method and apparatus for designing a nr broadcast channel in a wireless communication system

专利摘要:
According to the present invention, a common control signal is defined through a group common control channel (gccc) for a new radio access technology (nr). a user equipment (eu) receives the common control signal from a network via gccc. The common control signal fits all ues or a group of ues in a cell. This deals with the priority of the common control signal compared to other signals. for example, the common control signal priority may be higher than a configuration specifically configured to semi-static, and may be lower than a configuration commonly configured for the cell or commonly for a group.
公开号:BR112019010659A2
申请号:R112019010659
申请日:2017-11-27
公开日:2019-10-01
发明作者:Kim Byounghoon；Lee Seungmin；Yi Yunjung
申请人:Lg Electronics Inc；
IPC主号:

专利说明:

“METHOD AND APPARATUS TO DESIGN A BROADCASTING CHANNEL FOR NR IN A WIRELESS COMMUNICATION SYSTEM”
BACKGROUND OF THE INVENTION
Field of the Invention [001] The present invention relates to wireless communications, and, more particularly, to a method and apparatus for designing a broadcasting channel, for example, common to a group or common to a cell, for an access technology via new radio (NR) in a wireless communication system.
Related Technique [002] Long-term evolution (LTE) of the third generation partnership project (3GPP) is a technology to enable high-speed packet communications. Many schemes have been proposed for the purpose of LTE including those aimed at reducing user and provider costs, improving service quality and expanding and improving system coverage and capacity. 3GPP LTE requires reduced costs per bit, increased service availability, flexible use of a frequency band, a simple structure, an open interface, and adequate power consumption from a terminal as a higher level requirement.
[003] Since more and more communication devices require more communication capacity, there is a need for improved mobile broadband communication in relation to the existing radio access technology. Likewise, massive machine-type communications (MTC), which provides various services connecting many devices and objects, are a major problem to be considered in next generation communication. In addition, a communication system project that considers service / UE sensitive to reliability / latency has been discussed. The introduction of next generation radio access technology that considers enhanced mobile broadband communication (eMBB), massive MTC (mMTC), ultra-reliable and low-cost communication is discussed
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2/89 latency (URLLC). This new technology can be termed as new radio access technology (new RAT or NR) for reasons of convenience.
[004] In NR, an analog beam formation can be introduced. In the case of millimeter wave (mmW), the wavelength is shortened so that a plurality of antennas can be installed in the same area. For example, in the 30 GHz band, a total of 100 antenna elements can be installed in a two-dimensional array of 0.5 lambda intervals (wavelength) on a 5 by 5 cm panel with a wavelength of 1 cm. Therefore, in mmW, multiple antenna elements can be used to increase the beam formation gain to increase coverage or increase throughput.
[005] In this case, if a transceiver unit (TXRU) is provided so that the power and transmission phase can be adjusted for each antenna element, an independent beam formation is possible for each frequency resource. However, installing a TXRU in all 100 antenna elements presents a problem in terms of cost effectiveness. Therefore, a method of mapping a plurality of antenna elements to a TXRU and adjusting the direction of a beam using an analog phase shifter is considered. This analog beamforming method has a disadvantage that it cannot perform frequency-selective beamforming because it can only make one beam direction across all bands.
[006] A hybrid beam formation with B TXRUs, which is an intermediate form of digital beam formation and analog beam formation, and less than Q antenna elements, can be considered. In this case, although there is a difference depending on the connection method of the B TXRU and Q antenna elements, the beam direction that can be simultaneously transmitted is limited to B or less.
[007] To operate NR efficiently, several schemes were discussed. In particular, NR bands can be operated on an unpaired spectrum
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3/89 to maximize bandwidth, and therefore can be operated over broadband. When downlink and uplink resources are multiplexed by time division multiplexing (TDM) in the unpaired spectrum, to minimize UE power consumption, it is important to indicate a direction of resources that can be dynamically changed.
SUMMARY OF THE INVENTION [008] The present invention relates to wireless communications, and, more particularly, to a method and apparatus for designing a broadcasting channel, for example, common to a group or common to a cell, for an access technology new radio (NR) in a wireless communication system. the present invention discusses a physical downlink control (PDCCH) channel design for NR. Common signaling for groups or cells can be used to indicate a direction of resource between downlink and uplink, and also to indicate other information related to UE assumptions about data measurements, transmission and control / monitoring.
[009] In one aspect, a method is provided for handling the priority of a common control signal by a user equipment (UE) in a wireless communication system. The method includes receiving the common control signal from a network through a common group control channel (GCCC), where the common control signal is for all UEs or a group of UEs in a cell, and dealing with the priority of the common control signal compared to other signals.
[010] In another aspect, user equipment (UE) is provided in a wireless communication system. The UE includes a memory, a transceiver and a processor, operationally coupled to the memory and the transceiver, which controls the transceiver to receive the common control signal from a network through a common group control channel (GCCC), in that the common control signal is for all UEs or a group of UEs in a cell, and handles the priority
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4/89 of the common control signal compared to other signals.
[011] The broadcasting channel common to group or common to cell for NR can be efficiently defined.
BRIEF DESCRIPTION OF THE DRAWINGS [012] Figure 1 shows a 3GPP LTE system.
[013] Figure 2 shows the structure of a 3GPP LTE radio frame.
[014] Figure 3 shows a resource grid for a downlink partition.
[015] Figure 4 shows an example of a type of subframe for NR.
[016] Figure 5 shows an example of indicating which DL / UL standard by common signal according to one embodiment of the present invention.
[017] Figure 6 shows an example of a procedure that acquires a beam index according to an embodiment of the present invention.
[018] Figure 7 shows an example of a fallback operation according to an embodiment of the present invention.
[019] Figure 8 shows an example of subband formation according to an embodiment of the present invention.
[020] Figure 9 shows an example of CSS formation according to one embodiment of the present invention.
[021] Figure 10 shows an example of using a guard band for common signal according to an embodiment of the present invention.
[022] Figure 11 shows an example of patterns for the coexistence of LTE and NR according to an embodiment of the present invention.
[023] Figure 12 shows a method for handling the priority of a common control signal by a UE according to an embodiment of the present invention.
[024] Figure 13 shows a wireless communication system to implement a modality of the present invention.
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DESCRIPTION OF EXAMPLE MODES [025] Figure 1 shows a 3GPP LTE system. The 3rd generation partnership project (3GPP) long-term evolution (LTE) system 10 includes at least one eNodeB (eNB) 11. The respective eNBs 11 provide a communication service to specific geographical areas 15a, 15b and 15c ( which are generally called cells). Each cell can be divided into a plurality of areas (which are called sectors). User equipment (UE) 12 can be fixed or mobile and can be called by other names such as mobile station (MS), mobile terminal (MT), user terminal (UT), subscriber station (SS), wireless device , personal digital assistant (PDA), wireless modem, portable device. ENB 11, in general, refers to a fixed station that communicates with the UE 12 and can be called by other names such as base station (BS), base transceiver system (BTS), access point (AP), etc.
[026] In general, a UE belongs to a cell, and the cell to which a UE belongs is called a server cell. An eNB that provides a communication service to the server cell is called an eNB server. The wireless communication system is a cellular system, so there is a different cell adjacent to the server cell. The different cell adjacent to the server cell is called a neighbor cell. An eNB that provides a communication service to the neighboring cell is called a neighboring eNB. The serving cell and the neighboring cell are relatively determined based on a UE.
[027] This technique can be used for DL or UL. In general, DL refers to communication between eNB 11 and UE 12, and UL refers to communication between UE 12 and eNB 11. In DL, a transmitter can be part of eNB 11 and a receiver can be part of UE 12. In UL, a transmitter can be part of UE 12 and a receiver can be part of eNB 11.
[028] The wireless communication system can be any one of a
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6/89 multiple input and multiple output system (MIMO), a multiple input and single output system (MISO), a single input and single output system (SISO) and a single input and multiple output system (SIMO). The MIMO system uses a plurality of transmitting antennas and a plurality of receiving antennas. The MISO system uses a plurality of transmitting antennas and a single receiving antenna. The SISO system uses a single transmitting antenna and a single receiving antenna. The SIMO system uses a single transmitting antenna and a plurality of receiving antennas. Later in this document, a transmitting antenna refers to a physical or logic antenna used to transmit a signal or stream, and a receiving antenna refers to a physical or logic antenna used to receive a signal or stream.
[029] Figure 2 shows a structure of a 3GPP LTE radio frame. With reference to Figure 2, a radio frame includes 10 subframes. A subframe includes two slots in the time domain. A time to transmit a transport block per layer higher than the physical layer (usually through a subframe) is defined as a transmission time interval (TTI). For example, a subframe can have a duration of 1ms, and a partition can have a duration of 0.5ms. A partition includes a plurality of orthogonal frequency division (OFDM) multiplexing symbols in the time domain. Since the 3GPP LTE uses OFDMA in the DL, the OFDM symbol is used to represent a symbol period. OFDM symbols can be called by other names depending on a multiple access scheme. For example, when SC-FDMA is in use as a UL multiple access scheme, OFDM symbols can be called SC-FDMA symbols. A resource block (RB) is a unit of resource allocation, and includes a plurality of contiguous subcarriers in a partition. The structure of the radio board is shown for illustrative purposes only. In this way, the number of subframes included in the radio frame or the number of
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7/89 partitions included in the subframe or the number of OFDM symbols included in the partition can be modified in several ways.
[030] The wireless communication system can be divided into a frequency division duplexing (FDD) scheme and a time division duplexing (TDD) scheme. According to the FDD scheme, the UL transmission and DL transmission are done in different frequency bands. According to the TDD scheme, UL transmission and DL transmission are performed for different periods of time in the same frequency band. A channel response from the TDD scheme is substantially reciprocal. This means that a DL channel response and a UL channel response are almost the same in a given frequency band. In this way, the TDD-based wireless communication system is advantageous in that the DL channel response can be obtained from the UL channel response. In the TDD scheme, the entire frequency band is divided in time for UL and DL transmissions, so a DL transmission by eNB and a UL transmission by UE cannot be performed simultaneously. In a TDD system where a UL transmission and a DL transmission are broken down into units of subframes, the transmission of UL and the transmission of DL are performed in different subframes. In a TDD system, to allow quick switching between DL and UL, the transmission of UL and DL can be performed within the same subframe / partition in time division multiplexing (TDM) / frequency division multiplexing (FDM).
[031] Figure 3 shows a resource grid for a downlink partition. Referring to Figure 3, a DL partition includes a plurality of OFDM symbols in the time domain. It is described in the present invention that a DL partition includes 7 OFDM symbols, and an RB includes 12 subcarriers in the frequency domain as an example. However, the present invention is not limited to this. Each element in the resource grid is called an element of
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8/89 resource (RE). A RB includes a 12x7 or 12x14 resource element. The Ndl number of RBs included in the DL partition depends on a DL transmission bandwidth. The structure of a UL partition can be the same as that of the DL partition. The number of OFDM symbols and the number of subcarriers can vary depending on the duration of a CP, frequency spacing, etc. For example, in the case of a normal cyclic prefix (CP), the number of OFDM symbols is 7 or 14, and in the case of an extended CP, the number of OFDM symbols is 6 or 12. One of 128, 256, 512, 1024, 1536, 2048, 4096 and 8192 can be selectively used as the number of subcarriers in an OFDM symbol.
[032] 5th generation mobile networks or 5th generation wireless systems, abbreviated 5G, are the next proposed telecommunication standards in addition to the current advanced LTE 4G / international mobile telecommunications (IMT) standards. 5G includes both new radio access technology (new RAT or NR) and LTE evolution. Later in this document, between 5G, NR will be determined. 5G planning aims at greater capacity than current 4G LTE, allowing for a higher density of mobile broadband users, and supporting massive machine communication device for ultra-reliable device 5G research and development aims at lower latency than 4G equipment and less battery consumption , for better implementation of the Internet of Things.
[033] The NR can use the OFDM transmission scheme or a similar transmission scheme. The NR can follow the existing LTE / LTE-A numerology, or it can follow the numerology different from the existing LTE / LTE-A numerology. NR can have a higher system bandwidth (for example, 100 MHz). Or, a cell can support multiple NR numerologies. That is, the UEs that operate in different numerologies can coexist within a cell in the NR.
[034] A different framework structure is expected to be required for NR. In particular, a different frame structure in which UL and DL can
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9/89 be present in each subframe or may change very often on the same carrier may be required for NR. A different application may require a different minimum portion size of DL or UL to support different latency and coverage requirements. For example, massive machine type (mMTC) communication for high coverage cases may require a relatively long portion of DL and UL so that a transmission can be successfully transmitted. Furthermore, due to the different requirement in synchronization accuracy requirements and tracking, a different subcarrier spacing and / or different PC life can be considered. In this sense, it is necessary to consider mechanisms to allow structures of different frames to coexist on the same carrier and be operated by the same eNB cell.
[035] In NR, the use of a subframe in which the downlink and the uplink are contained can be considered. This scheme can be applied for both paired and unpaired spectrum. The paired spectrum means that a carrier consists of two carriers. For example, in the paired spectrum, a carrier can include a DL carrier and an UL carrier, which are paired with each other. In the paired spectrum, communication, such as DL, UL, device-to-device communication and / or retransmission communication, can be performed using the paired spectrum. The paired spectrum means that a carrier consists of only one carrier, like the current 4G LTE. In the unpaired spectrum, communication, such as DL, UL, device-to-device communication and / or retransmission communication, can be performed in the unpaired spectrum.
[036] Furthermore, in NR, the following types of subframe can be considered to support the paired spectrum of the unpaired spectrum mentioned above.
(1) Subframes including DL control and DL data (2) Subframes including DL control, DL data and UL control
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10/89 (3) Subframes including DL control and UL data (4) Subframes including DL control, UL data and UL control (5) Subframes including access signals or random access signals or other purposes.
(6) Subframes including DL / UL and all UL signals.
[037] However, the types of subframe mentioned above are exemplary only, and other types of subframe can also be considered.
[038] Figure 4 shows an example of a subframe type for NR. The subframe shown in Figure 4 can be used in the NR TDD system, to minimize data transmission latency. With reference to Figure 4, the subframe contains 14 symbols in a TTI, like the current subframe. However, the subframe includes a DL control channel on the first symbol, and the UL control channel on the last symbol. A region for DL control channel indicates a transmission area of a physical downlink control channel (PDCCH) for transmitting downlink control information (DCI), and a region for UL control channel indicates an area transmission of a physical uplink control channel (PUCCH) for transmission of uplink control (UCI) information. Here, the control information transmitted by the eNB to the UE through the DCIs may include information about the cell configuration that the UE should know, specific DL information, such as DL scheduling, and specific UL information such as UL grant. Also, the control information transmitted by the UE to the eNB through the UCIs may include a hybrid automatic confirmation / non-confirmation (ACK / NACK) report of the DL data, a channel status information report (CSI) about DL channel status and a scheduling request (SR). The remaining symbols can be used for DL data transmission (for example, downlink shared physical channel (PDSCH)) or for transmission of data.
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11/89 UL data (eg, uplink shared physical channel (PUSCH)).
[039] According to this subframe structure, DL transmission and UL transmission can proceed sequentially in a subframe. Consequently, DL data can be transmitted in the subframe, and UL confirmation / non-confirmation (ACK / NACK) can also be received in the subframe. In this way, the subframe shown in Figure 4 can be called an independent subframe. As a result, it can take less time to retransmit data when a data transmission error occurs, thereby minimizing the final data transmission latency. In the independent subframe structure, a time interval may be necessary for the process of transition from transmission mode to reception mode or from reception mode to transmission mode. For this purpose, some OFDM symbols when switching from DL to UL in the subframe structure can be adjusted to the guard period (GP).
[040] Later in this document, several aspects of designing a broadcast channel, for example, common group or common cell, for NR are described according to the modalities of the present invention. In NR, a single beam operation and / or multiple beam operation can be expected. In addition, due to the different bandwidth between different UEs, a different data subband can be configured for different UEs. Also, a different network entity with different transmit / receive points (TRPs) can transmit different information.
[041] The present invention discusses an efficient mechanism for indicating common signal (or, common information) to all UEs or a group of UEs in a cell. The group of UEs can be grouped based, for example, on one of the following.
[042] - Data subband (or, part of bandwidth (BWP)): UEs that share the same data subband can be grouped.
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12/89 [043] - Primary TRP in charge: UEs can be grouped based on the primary TRP dealing with UEs.
[044] Other grounds for EU grouping are not prohibited. For example, the network can separate UEs into different groups in the usage scenario (for example, ultra-reliable, low-latency communication (URLLC) / advanced mobile broadband communication (eMBB)), UE capacity (for example, support coexistence NR / LTE or not) or numerology used for data transmission (for example, 15 kHz or 30 kHz subcarrier spacing), etc. In particular, when a UE supports multiple TDM numerologies, the common group signaling numerology can also be different. And for that, the numerology used in the common group signage can be configured / determined for each group. Furthermore, the subframe can be used interchangeably with partitioning in the present invention.
[045] In accordance with an embodiment of the present invention, common signal contents are proposed. Common signal content can include at least one of the following information.
[046] - If a current subframe type is UL centered or DL centered or reserved for UL or DL [047] - If a type of the next subframe type is UL centered or DL centered or reserved for UL or DL [ 048] - If a type of a few upcoming subframes including the current subframe types is UL-centered or DL-centered or reserved for UL or DL [049] - If a type of a few upcoming subframe types is UL-centered or centered on DL or reserved for UL or DL [050] - If the current subframe is scheduled with single level DCI or two / multiple level DCI [051] - If the next subframe is scheduled with single level DCI or DCI
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13/89 two / multiple levels [052] - The size of the common or group-specific shared control resource set [053] - The OFDM symbol set or the set of research spaces or the set of candidates: Wait the target UEs are monitored the OFDM symbol set / search spaces / candidates in the current or next subframe [054] - The OFDM symbol set and / or frequency regions: Can be expected that the targeted UEs monitor or use the OFDM / frequency region symbol set for data control / mapping. For example, a feature for compatibility with newer versions or a feature that is not usable for NR due to the coexistence of LTE / NR, etc., may be indicated.
[055] - Resource reserved for UEs of different numerology: This may be included in the description above, or a separate indication may also be possible.
[056] - Resource reserved for sidelink or backhaul: This may be included in the description above or a separate indication may also be possible. Most importantly, the sidelink or backhaul resource can be represented as a “reserved” or “unknown” resource for regular access link UEs, as the resources are not usable for such UEs.
[057] - Resource reserved for reasons compatible with newer versions / previous versions, for example, for use of LTE in the case of sharing ULe / or DL of LTE-NR: Particularly, the UL, if a UE is connected to LTE and NR in the same UL spectrum, time division multiplexing (TDM) in UL sharing can be considered, and resources allocated for the transmission of UL from LTE can be configured as a reserved resource in perspective of UL of NR [058] - Indication of DL resource, ULe resource / or real reserved resource:
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The DL, ULe reserved feature can be indicated separately. For a paired spectrum, the reserved resource can be configured for DL and UL spectrum, separately. In addition, there may be a reserved resource configured semi-statically in a frequency and / or time domain. The reserved resource can be called different names. For example, the reserved resource can be called a flexible resource, that means resource used for DL or UL in a flexible way. Or, the reserved resource can be called an unknown resource, which means a resource whose use is not known until determined. When the signal is not available, all resources can be unknown resources or flexible resources, which can be changed to different types of resources.
[059] For example, the DL resource can have one of the following patterns.
[060] · Entire partition of DL [061] · Partition duration - duration of 2 DL [062] · Partition duration - duration of 3 DL [063] · Partition duration - duration of 4 DL [064] · Only the DL duration of the control region.
[065] · Alternatively, other numbers can also be considered. [066] For UL feature, one of the following standards can be considered. [067] · Entire partition of UL [068] · Partition duration - 1 - UL duration of control region size [069] · Partition duration - 2 - UL duration of control region size [070] · Partition duration - -3 - UL duration of control region size [071] UL duration of configured UCI region size (for example 1 or 2 or 3 or X depending on configuration).
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15/89 [072] · Alternatively, other numbers can also be considered.
[073] For reserved feature, one of the following standards can be considered.
[074] · First X symbols: X can be configured top layer.
[075] · Bitmap pattern 1: For example, bitmap pattern 1 can be [0 0 0 0 1 1 1] where reserved bits are reserved for the last partition portion.
[076] · Bitmap pattern 2: For example, bitmap pattern 2 can be [1 1 1 1 0 0 0] where reserved bits are reserved for the first partition portion.
[077] · The configuration of bitmap patterns can be configured in a semi-static way, and the indices can be indicated through dynamic signaling.
[078] · Without reserved portion [079] · Entire partition is reserved [080] - In combination of DL, UL and reserved resource, the partition type can be defined as' DL (s) - Unknown (s) - UL (s) 'for each partition. Each DL or Unknown or UL can have 0, 1, 2 ... 14 symbols in each partition, but the total number of symbols in each partition can be limited to 14. When multiple DL-UL switching occurs, the ' DL-Unknown-UL 'can be applied to 7 OFDM symbols instead of 14 OS or 4/3 symbols within the case of 7 OFDM symbols (for switching 2, 4, respectively). In other words, the partition type or subpartition type can start with zero or more DL symbols and end with zero or more UL symbols. And, undefined symbols can be treated as unknown resources or reserved resources.
[081] - A set of beam pairs or transmission beams used in the next partitions: To minimize the overhead of blind UE detection, a transmission beam sequence in one partition or through some nearby ones
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16/89 partitions can be indicated. This information can be transmitted by each beam. This information can be transmitted on the partition where control channels are transmitted by scanning multiple beam bundles, regardless of actual scheduling or common data scheduling. In other words, information can be transmitted along with common data.
[082] The proposals in the present invention can also be applied to the case where a UE acquires the formation of partition through semi-static signaling. Semistatic signaling can be indicated specifically for cells, common to the EU group or specifically for the EU. In particular, the reserved resource can be configured semi-statically, and a dynamic indication may not have an explicit indication on the reserved resource. In the case of semi-static configuration, the pattern format patterns can be used, and the behavior of a UE can be similar as shown in the present invention.
[083] A partition type can be indicated by a bitmap for each or a set of OFDM symbols, and each bit can represent DL or UL (or DL or UL or reserved resource). When DL / UL is used to indicate the type of each or a set of OFDM symbols, DL may include DL or reserved resource. Alternatively, UL can include UL or reserved resource. In other words, the reserved resource can be expressed by DL or UL, if two type indications are used. In addition, the number of OFDM symbols that belong to each set or each bit or the bitmap size that represents each partition can be configured by the top layer. The set of OFDM symbols corresponding to a bit in the bitmap can be 1 the partition size. When a partition type indication is for a partition set instead of a partition, a set of OFDM symbols within the partition set can be defined. The number of partitions indicated by a partition type indication can also be
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17/89 be configured by the upper layer.
[084] When multiple referral purposes are achieved and a common signal can be scheduled with a temporary radio network identity (RNTI), a UE can search for more than one RNTI to find the necessary information. Each common signal based on each RNTI can have different functionality. For example, for a URLLC UE, the resource reserved for eMBB, but not reserved for URLLC UE may be available for transmission / reception of URLLC traffic. Also, for example, UEs with triggered channel status information signal (CSI-RS) can assume that the subframe / partition can transmit CSI-RS, while UEs with semistatic or persistent CSI-RS configuration can assume that the subframe / partition may not transmit CSI-RS if the subframe is indicated as UL-centered. Either way, it is highly possible that the CSI-RS transmission location is different. The common signal may apply to UEs with partition-based scheduling only, or it may also be applicable to UEs with mini-partition-based scheduling, depending on your configuration. When a UE is configured with a mini-partition, it can be indicated whether or not the common signal is also applicable to mini-partition scheduling. More generally, different RNTIs or search spaces can be configured for scheduling based on a minipartition to transmit a common signal, if a scheduling common to a different group is applied. Depending on the partition-based or mini-partition-based scheduling, a UE can apply different information to a common control channel to a different group.
[085] According to an embodiment of the present invention, the combination of different information is proposed. Although a physical channel is used, a different set of information or information can be transmitted in each incident, depending on the configuration. For example, the type of partition,
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DL / UL / reserved resource may be indicated at different intervals. For example, the partition type can be transmitted with a periodicity that is applied during the interval, and DL / UL / reserved resource information can be transmitted periodically or with a different periodicity that is applied only to the same partition. Depending on the configuration, content other than a common or group control channel can be expected. Also depending on your content, even if the channel itself is the same (in relation to channel encoding, mapping, DCI format, etc.), the mapped candidate may be different. For example, the type of partition can be indicated for any candidate in the common or common group search space. However, if dynamic signaling in the number of OFDM symbols is indicated, it can be mapped to the first pre-fixed candidate index or semi-statically configured so that it can be obtained without any blind decoding (to minimize latency).
[086] According to an embodiment of the present invention, the periodicity of signal transmission in time is proposed. The following mechanisms can be considered to indicate a common signal. In the description below, the common signal refers to a group or cell-specific signal that is applicable to all UEs or a group of UEs in a cell, depending on how the signal is projected. If multiple common signals are used for different purposes or different UEs, one or more of the following mechanisms can be used together.
(1) The indication can be made in the current subframe [087] The indication can have higher priority than the semistatic signals configured, such as semistatic configuration of transmission of audible reference signal (SRS).
[088] The indication may have a lower priority than the dynamically indicated schedule. The UE can ignore the common signal if the schedule indicates otherwise. In the dynamic indication “x” partitions / subframes were transmitted before,
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19/89 the common signal may have higher priority than the dynamically indicated schedule. In other words, the dynamically indicated schedule that took place on the same subframe / partition may have a higher priority than the common signal. Otherwise, the common signal may have a higher priority than the dynamically indicated schedule. In other words, the most recent signaling can always have the highest priority than other signaling, regardless of common / EU-specific and / or dynamic / semi-static signaling. Alternatively, since the common signal may not be received by the UE, dynamic signaling specific to the UE can always have a higher priority than the common signal.
[089] If the indication is not given, a UE can always assume that the common signal is present. Thus, if the common signal is not present, the current subframe / partition may not be valid or the resource type (s) within a partition may not be determined. Alternatively, a UE may, in due course, assume that the common signal may be present. If the common signal is not present, the default configuration or configuration of the previous subframe / partition can be applied to the subframe / partition. The standard configuration can be given by UE or UE group or by cell. Alternatively, a UE may not be necessary to read the common signal. That is, it may be the UE's ability to read the common signal. If a UE is unable to read the common signal, a UE's fallback behavior can be used. Alternatively, a UE can assume a different value for each field or each indication to avoid any negative impact on the network side.
[090] If the common signal is assumed to be present in each subframe, and the common signal is not detected in the first OFDM symbol of a partition, the UE can search for the common signal in the next OFDM symbol. The UE can assume that the first OFDM symbol is the blank OFDM symbol if the common signal is not detected. More generally, this common signal can be transmitted on each
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20/89 symbol to indicate whether the current symbol is valid or invalid.
(2) The indication can be made before the subframe [091] For example, to indicate whether the first OFDM symbol is blank or reserved, the indication before the current partition / subframe can also be considered. In addition, to minimize latency, the common signal can be transmitted before the current partition / subframe. Also, to adapt the network bandwidth, the bandwidth can also be indicated before the actual transmission. Also, if the network wants to dynamically reconfigure or change the frequency region in which the common signal is transmitted, the common signal can be transmitted beforehand. The common sign may indicate the following subframe / partition, and multiple indication may be possible.
[092] In terms of priority, a similar priority described above can be applied to this case as well.
(3) The indication can be made at the end of the current subframe or at the beginning of the next subframe [093] For example, the indication cannot be transmitted before or some changes may occur during the partition / subframe. In this case, the indication of the next or the end of the current subframe can also be considered. The end of the partition / subframe can refer to the last OFDM symbol (s) of the partition / subframe or the last OFDM symbol (s) of the DwPTS (DL portion) excluding the guard period and / or the UL portion. The signal for this may include indication of previous versions of reserved signal or punctured feature. If the common signal is transmitted at the end of the partition / subframe, data rate matching may be required. One of the following options can be considered for data rate matching.
[094] - Data rate matching can always be done on the common or group control channel.
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- Data rate matching can only be done on the resource used by the common control channel (s) or group control channel (s).
- Data rate matching can be done and the common or group control can perform the punching.
- An option between different options can be configured over the network.
- The common signal can be transmitted within the reserved resource or guard period so that the data rate correspondence is not submitted to the transmission of a common or common control channel to a group. A similar approach can be considered for the case where the common or group-common control channel is transmitted at a fixed time / frequency location within a partition (for example, fixed by search space candidate, fixed by frequency or fixed by time / frequency resource, etc.), and control channels can be transmitted through the common or group control channel resource. In such a case, data rate matching on the control channel can be done by a similar approach as mentioned above.
(4) The indication can be made simultaneously in the current subframe and in the next subframe [095] Depending on the type of indication, the indication for both the current or next partition / subframe and for the current / next subframe can also be considered. This can be effective when the first OFDM symbol of the next subframe / partition can be reserved or the resource on which the common signal is transmitted is reserved.
(5) The indication can be made simultaneously in the current and / or future subframe [096] Similar to the option above, however the indication can be dynamically changed to indicate only the current subframe, or only the future subframes or both. To differentiate, a field can be present to indicate which indication is used in the common signal.
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22/89 (6) The indication can be made periodically. Particularly with (4) / (5), different numbers of partitions / subframes can be indicated by each indication.
[097] In this case, OnJDuration Discontinuous Reception (DRX) UEs may not be expected to receive common control channels, or it may not be expected to change or apply certain behaviors based on the common signal. In other words, operation without reading the common or group-common control channel can be performed particularly for XRD UEs.
(7) The indication can be made by activating / deactivating the control element (CE) of media access control (MAC).
(8) The indication can be made periodically / aperiodically for multiple subframes / partitions [098] In this case, the indication can also include the duration for which the indication is applied. Or, the indication may have a bitmap field to indicate which subsequent subframes are applied with the indicated information.
(9) Similar to DCI interference management and advanced traffic adaptation (elMTA), within a certain interval (which can be configured by the upper layer), one or multiple times of common or common control channels can be transmitted. If multiple transmission times occur within a period / interval, the same information can be transmitted. This serves to increase reliability and also to manipulate XRD UEs. More particularly, if the common signal is configured to be transmitted periodically, considering that resources may not be available due to reserved / UL, the duration / window within each period in which a UE can monitor multiple occasions of control transmission can be configured to increase common signal transmission opportunities.
[099] According to an embodiment of the present invention, the manipulation of different information between the semistatic configuration and a common PDCCH or
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23/89 between dynamic scheduling DCI and common DCI is proposed. The common PDCCH can be called another name, for example, common or group-common control channel (GCCC). Depending on the content, different manipulation seems necessary if the GCCC displays information different from the information known as semi-static configuration or dynamic scheduling. For example, if a partition type includes a guard / reserved period that can be used for certain applications such as URLLC, URLLC UEs need to assume that reserved portions can be used for dynamic scheduling based URLLC. Another issue is how to handle resources exempt from concession, whether these can be transmitted in DL / reserved resource indicated or not by the GCCC. In general, when the network indicates the DL resource for the concession-exempt resource portion, the concession-exempt transmission may not be successfully received by the network, regardless of whether the UE transmits or not. In this sense, it is generally better to assume that the grant-exempt resource can be canceled by the GCCC. However, URLLC UEs can still use the reserved resource. To solve this problem, a separate partition type indication can be provided for different UEs (for example, eMBB UEs and URLLC UEs). Or, a UE can assume that semi-statically configured UL resources are valid unless the portions are retrieved as DL. If the preemption indication is used, a GCCC can override scheduling DCIs.
[0100] However, to support very reliable / low-latency URLLC UEs, some concession-exempt resources can be reserved and cannot be canceled by any common signal or dynamic signaling, unless a reconfiguration is made. UEs granted to use such a resource may ignore the GCCC signal for the determination of an exempt resource.
[0101] In terms of total priority, the following options can be considered. The semi-static configuration in flexible resource may or may not be
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24/89 as amended by GCCC. The flexible resource can be determined by the resource that is not indicated as a fixed DL resource or fixed UL resource by assigning semi-static DL / UL, which can be transmitted in remaining system information (RMSI) / system information on demand (OSI ) and / or EU-specific signage. DL / UL assignment can be provided to a SCell via specific EU signaling. In specific EU signaling, a different DL / UL assignment may be possible. The common DL / UL assignment to the cell can be transmitted via cell-specific signaling such as RMSI / OSI, and UE-specific can be transmitted via EU-specific signaling. Since there may be a different behavior depending on the DL / UL assignment characteristic, the type needs to be separated in SCell configuration. It can also be differentiated whether or not it is included in the SIB (1) The GCCC may have the lowest priority. Unless there is no conflict, a UE can apply the configuration indicated by the GCCC.
(2) The GCCC may have the highest priority. For the RNTI configured to read the GCCC, information may have a higher priority compared to another dynamic or semi-static DCI configuration.
(3) GCCC may have a higher priority than the setting configured specifically for UE, it may have a lower priority than settings commonly configured for cell or settings commonly configured for group, and it may have lower priority than settings dynamically configured specifically for HUH. In terms of dynamic DCI, the priority can also be determined based on the effective timing. If the common signal is applied or transmitted after dynamic DCI, the common signal may have a higher priority than dynamic DCI. For example, if dynamic DCI schedules cross-subframe / partition scheduling on k-partitions where the common signal is transmitted between n and n + k partitions, the common signal may have higher priority
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25/89 than dynamic DCI. Or, to minimize ambiguity or uncertainty about whether a UE received the common signal or not, dynamic DCI may have a higher priority than GCCC regardless of timing.
[0102] More generally, the following options can be considered in the event of a collision between GCCC and semi-statically configured resources, particularly with a view to partition indication. When there is no collision (that is, information transmitted in GCCC and semi-static configuration do not conflict), the information in each is obeyed.
(1) Option 1: 0 GCCC can always replace semi-static resources including physical broadcasting channel (PBCH) resources / primary synchronization signal (PSS) / secondary synchronization signal (SSS). Although the features of PBCH / PSS / SSS are semi-statically or predefined, they can be changed by the GCCC. When a UE detects the GCCC which indicates that the OFDM symbols for PBCH / PSS / SSS are DL, the resources for PBCH / PSS / SSS can be reserved for PBCH / PSS / SSS, so that the data can match the rate at these reserved resources. If the GCCC indicates UL, a UE may assume that PBCH / PSS / SSS resources may not be used for PBCH / PSS / SSS and may be deprecated by the transmission of UL.
(2) Option 2: The GCCC can replace most semi-static features with exceptions. Exceptions may include one or more PBCH / PSS / SSS / control region / concession-exempt resources.
(3) Option 3: The GCCC cannot replace the semi-static feature, at least configured specifically for the cell or specifically for the group. In other words, the configuration by system information block (SIB) / PBCH may not be changeable, while the specific settings for UE (for example, CSI-RS) can be changed or replaced by the GCCC. In other words, the GCCC cannot replace the configuration with RMSI / OSI, while it can replace any
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26/89 configuration provided by the specific configuration for UE. In terms of SCell, the SIB configuration can also be considered as specific signaling for UE. Or, in a specific configuration for UE, at least for the SCell SIB configuration, it can be indicated whether the configuration can or cannot be replaced or it can be determined whether the configuration is included in SIB or not.
(4) Option 4: The GCCC cannot replace the semi-static feature including specific configuration for UE. Another alternative is to place higher priority on the semi-static configuration.
(5) Option 5: The priority can be configured. For each configuration or general priority between the semi-static configuration and the dynamic PDCCH it can be configured by the upper layer together with the GCCC enabling configuration. When priority is set for each setting, it can be explicitly stated for each setting (for example, the setting cannot be replaced by GCCC or it can be replaced by GCCC). As a standard, the features predefined in the specification, unless otherwise configured by the upper layer later, cannot be replaced by GCCC and the semi-static configuration can be replaced by GCCC ..
(6) Option 6: The GCCC can always replace the semi-static configuration. In other words, the GCCC may have a higher priority than the semi-static configuration.
(7) Option 7: The GCCC can replace the semi-static configuration on resources considered to be flexible and cannot replace the semi-static configurations on resources considered as fixed DL or UL resources. The flexible feature can be determined by semi-static DL / UL configuration. If the semi-static DL / UL configuration is provided by the cell-specific configuration and / or UE-specific configuration and / or EU-common configuration, the fixed DL / UL features indicated can be considered as fixed DL or UL.
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Alternatively, the flexible feature can be determined by features or types of RS of semi-static configuration. For a given RS (for example, tracking RS, CSI-RS beam management or SS block or physical random access channel (PRACH)), the configuration can define fixed DL or fixed UL resources, and others can be considered as flexible resources. Alternatively, the flexible feature can be determined by the configuration method. For example, resources that are configured semi-statically by broadcast messages such as ISMS or configured specifically for cell can be considered as fixed DL or UL resources. For example, if the beam management RS is defined by RMSI, or SS block or the PRACH is defined by RMSI, the configured resources can be considered as fixed DL or UL resources.
[0103] If semi-static DL / UL configurations are provided, and there are multiple configurations with different types of RS and / or based on different configuration methods (ie several approaches described above are used together), it can be assumed that the union of fixed DL / UL resources is used for DL / UL semi-static configuration and RS semi-static configuration, or it can be assumed that no conflict occurs. If conflict occurs, the UE can treat the case as an error case, or the UE can follow the DL / UL semi-static configuration.
[0104] For different options described above, it may be necessary to clarify that the resources reserved for PBCH / PSS / SSS may include only real resources intended for PBCH / PSS / SSS. For example, potential resources for PBS PSS / SSS can be reserved for the N SS block and only a subset of N SS blocks can be used. In this case, the unused SS blocks can be indicated for UEs, so that they can be used for control / data / other transmission. Since unused resources are seldom used in a deterministic manner, unused resources can be indicated by the upper layer (common to group or cell specific or specific to
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EU) to the UEs. In such a case, even with option 2, the allocation of resources on such an unused resource can be changed (that is, unused resources cannot be counted for the PBCH / PSS / SSS region).
[0105] A different priority between the semi-static configuration and the GCCC can be defined (for example, standard behavior or priority rule). For example, the GCCC can replace the CSI-RS configuration, but the GCCC cannot replace the grant-exempt resources (at least some resources).
[0106] More specifically, there may be different types of resources, ie DL / UL / flexible / reserved. Depending on the priority, different UE behavior can be considered.
[0107] Regarding the relationship between the GCCC and dynamic scheduling, the following priority can be considered.
(1) Option 1: Dynamic scheduling can always replace GCCC.
(2) Option 2: Dynamic scheduling cannot replace the GCCC with the UL feature. In other words, if the GCCC indicates UL resources, dynamic scheduling cannot change UL resources to DL resources. If this occurs, the UE may assume that such resources are not used for DL (for example, for measurement, data mapping, etc.).
(3) Option 3: Dynamic scheduling cannot replace GCCC with the DL feature. Similar to Option 2, it may not be possible to change the resources indicated as DL by GCCC with dynamic scheduling.
(4) Option 4: Dynamic scheduling cannot replace GCCC. That is, GCCC can always have a higher priority than dynamic scheduling.
(5) Option 5: The priority can be configured. Similar to the relationship between GCCC and semi-static configuration, the relationship between GCCC and dynamic scheduling can be configured by configuration or by the upper layer.
[0108] Here, dynamic scheduling can include enabling / disabling of
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29/89 DL data scheduling, UL granting, semi-persistent scheduling (SPS), any activation / deactivation messages. For each channel or type of dynamic scheduling, different behavior can be defined. For example, the GCCC may have a higher priority than the UL grant, but the GCCC may have a lower priority than the DL schedule.
[0109] When the common signal indicates reserved resource, the reserved resource can be used for some purposes by additional signaling or dynamic DCI indication or configuration. For example, the resource reserved for eMBB UEs can be used for URLLC. As another example, the reserved resource can be used for sidelink operation. As another example, the reserved resource can be used for backhaul links. For sidelink, semi-static sidelink resource pools can be configured in which actual sidelink resources are considered to be available if semi-static sidelink resources are indicated as reserved resources or UL resources.
[0110] If multiple GCCC or different content are adopted, the priority can be configured or determined differently depending on the channel or the content. For example, if the common signal transmits the partition type, option 3 described above can be applied. If the common signal transmits control region size information, the priority can be determined so that the common signal can have a higher priority than the dynamic semistatic and / or DCI configuration. An example is that dynamic DCIs can indicate the starting position of the OFDM symbol for data transmission and the common signal can indicate the end of the control region where the data is rate matched or punctured in the resource where the control channel correspondent is mapped to schedule data.
[0111] In accordance with an embodiment of the present invention, the location of time / frequency signal transmission is proposed. When GCCC is used to handle UEs with a different radio frequency (RF) bandwidth, a
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Separate GCCC can be configured by UEs with different RF bandwidth. In other words, different GCCCs can be configured for UEs with different RF bandwidths. Alternatively, the GCCC can be transmitted within the lowest bandwidth so that all UEs can access the GCCC. If multiple regions are monitored by UEs with small RF bandwidth, it may still be necessary to transmit multiple GCCCs in a different frequency region. UEs that support higher bandwidth can detect multiple GCCCS that can have the same content. Alternatively, the GCCC can be transmitted based on the nominal RF bandwidth with aggregation level L. The aggregation level L / 2 can be accessed by UEs with nominal BW / 2, and the aggregation level L / 4 can be accessed. accessed by UEs with nominal BW / 4. In other words, based on the RF bandwidth, a different level of aggregation can be used. Alternatively, GCCC can be used only for UEs that support at least M MHz. M can be prefixed or configured over the network. This can be indicated by the network by configuring RNTI to monitor the GCCC. In other words, the GCCC can be monitored based on the semi-statically configured RNTI value (s).
[0112] In accordance with an embodiment of the present invention, the control channel format is proposed. At least for the partition type indication, the smallest DCI, which can be transmitted via common search space or group search space, can be used. To minimize decoding latency so that the common signal can be applied to the current partition, the set of candidates where the common signal can be transmitted can be restricted to a subset of candidates or the first OFDM symbols in the control region or frequency region between the set of control features. To minimize overhead, aggregation level 1 or 2 can be used for GCCC and, in addition, a small cyclic redundancy check (CRC) can be used
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31/89 be used. Depending on the content, the restriction or the number of blind detections required to acquire the common signal may be different.
[0113] If a common or common group search space is shared between the common signal and / or other data common to control scheduling and / or transmission power control commands (TPC) and / or fallback DCIs, the the hash function of these DCIs may need to be adjusted depending on the aggregation level used for the GCCC or depending on whether the resource for the GCCC is reserved or not. For example, if aggregation level 1 is used for GCCC, the hash function for common or group-common search space for fallback DCI or DCI scheduling data or TPC commands can begin at the 2nd control channel element (CCE ) instead of 1 ^Q CCE. Alternatively, to minimize the impact on other DCIs, the GCCC can be transmitted at the last CCE or its blind decoding can be started from the end of CCE (for example, the hash function for GCCC can be set to N where N is the number of CCEs in the common or group search space). N can be changed per partition depending on the size of the control feature set or common or group search space configuration. In other words, the GCCC mapping can start from the end of CCE (in a reverse mapping). If the aggregation level is greater than 1, DCI can be mapped to CCE N-1 and CCE N and the hash function starts from N-1. If candidates are M with aggregation level L, the hash function can start at N - M * L +1, where M candidates can be searched sequentially.
[0114] In general, the idea is to map the common control search space differently from other DCIs, particularly if the aggregation levels are different. If the aggregation levels are the same, the same search space can also be shared. Also, a different search space can be used if different DCI sizes are used between data common to the
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32/89 scheduling of DCIs or TPC and GCCC. If reserved resources are used, regardless of the presence of common data, the reserved resource can be rate matched to another control transmission. To minimize the burden of blind decoding, a set of aggregation levels used for the GCCC can be further restricted, that is, a different set of aggregation levels can be configured for GCCC and other DCIs. More generally, a set of aggregation levels can be configured differently by RNTI and / or by DCI format. Also a different hash function can also be considered by RNTI and / or by DCI format. In addition, a different set of control and / or search space configuration features can also be used by RNTI and / or DCI format. A different set of control features can be used depending on UE knowledge from a network perspective. If contention-based PRACH is transmitted, the SS for random access response (RAR) can be used which is shared between UEs that use the same set of PRACH resources (or connected to the used PRACH resource). On the other hand, if the containment-free PRACH is transmitted, the UE-specific search space (USS) for the UE can also be shared for RAR transmission.
[0115] In accordance with an embodiment of the present invention, the application of a common signal is proposed. At least one of the following mechanisms can be applied.
(1) The common signal can be applied to UEs with RNTI configured for GCCC. In this case, the common signal may not be applied to data common to the cell, such as paging, RAR, SIB, radio resource management (RRM), etc. In other words, the GCCC may not be applied to UEs in non-RRC mode or just for unicast control / data. In other words, in terms of GCCC priority or manipulation, semi-static configuration can always be prioritized
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33/89 for common data. For example, paging can always be expected on the configured paging occasion, RAR can be transmitted on the resource based on the semistatic resource configuration, PRACH can be transmitted on the allocated PRACH resources, the PBCH can always be transmitted on the configured resources, and the SIB can always be transmitted on the configured resource. Note that this is from the perspective of the UE, and the network may not transmit data on the configured resource for some reason (s). At least one of the following may be excluded from the application of the GCCC.
- PBCH transmission
- SIB transmission
- Paging transmission
- PRACH transmission
- RAR transmission (RAR window): For example, if the common signal is also applicable to RAR, the RAR window can be configured so that it counts only valid DL subframes / partitions, thus, depending on the signaling, the Actual duration may change.
- RRM measurement This can also be applied to neighboring cells. A set of subframes usable for measuring RRM can be fixed which can be performed by fixed DL subframes / partitions. The configured set of fixed DL subframes / partitions can always be DL partitions / subframes, unless explicitly reconfigured to be flexible subframes / partitions. To support this, the RRM resource indicated for a neighboring cell measurement can be considered as a fixed DL resource. To support this, separate measurements can be exchanged via gNBs. A UE may not be required to monitor the neighboring cell GCCC to perform measurements.
- Radio link failure measurement (RLF)
- Tracking subframes: Similar to RRM, the transmission of RS from
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34/89 tracking can also occur within the fixed DL subframes / partitions.
- Transmission of synchronization signals
- Fixed common search space: In combination with the tracking RS transmission, a set of subframes can be fixed with common search space and the shared RS transmission can be expected, regardless of the common data transmission. If such a configuration is achieved, regardless of the presence of common control, these signals and behaviors can be maintained.
- Periodic CSI feedback measurement
- Periodic SRS transmission
- Periodic scheduling request (SR) feature
- Concession-exempt PUSCH resources (2) The common signal can be applied to all RRC_CONNECTED UEs. In this case, a UE may behave differently depending on the detection of GCCC. For example, RRM may not be performed on a partition / subframe that is indicated only as an UL partition. This can be particularly beneficial if a different RS is used for measuring RRM for RRC_CONNECTED UEs compared to RRCJDLE UEs. In that case, depending on the common signal content, an UE may or may not perform RRM measurement. If sufficient aggregation of RRM measurement cannot be obtained due to dynamic change of partition type, a manipulation similar to licensed and assisted access (LAA) measurement can be used. That is, a relaxed measurement can be performed or a single measurement can also be considered. A similar approach can also be applied to tracking / RLF measurement and if the tracking RS or RLF measurement RS has not been transmitted, the network can transmit RLF tracking RS / measurement RS to support the UE requirement.
(3) The common sign can be applicable to all UEs regardless of the
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35/89 RRC status. The same can be applied to RRCJDLE UES or RRCJNACTIVE UEs as well. Particularly in this case, information about GCCC (frequency, time interval, time location, resource configuration, RNTI information, etc.) needs to be indicated by common data such as PBCH or SIB, so that all UEs can access the information unless stated in the specification. To support different UEs with different bandwidths that are anchored in different frequency regions within the system's bandwidth, multiple copies of GCCC can be transmitted. Since different UEs have a different periodicity to activate, the information can be applied only within the partition or next partition or previous partition where the common signal is transmitted. Or, if periodic transmission is used, multiple repetitions of transmissions within a range can be supported.
(4) Some features may be impacted by a common signal to meet RRC status, while some features may not be impacted by the common signal. For example, the transmission of RS / sync signal for RRM measurement to RRCJDLE UEs can be performed without impact by common signal, while RS for RRM measurement of RRCJDONNECTED UEs can be impacted by common signal or DL / configuration Semi-static UL (EU specific). As another example, PRACH based on containment may not be affected by common signal, while PRACH based on activated and / or exempt from containment may be affected by common signal. In other words, the contention-based PRACH features can be indicated as a UL feature by GCCC, while the PRACH feature for contention-free can be replaced by GCCC. As another example, the transmission of common search space to RRCJDLE, DRX UEs may not be affected by a common signal, while the transmission of common search to active UEs may be affected by a common signal. As another example, the DRX timer may not be affected
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36/89 by the common signal to minimize ambiguity or misalignment between the UE and the network.
[0116] In particular, the common signal can affect all resources configured specifically for UE, while the same signal may not affect all resources configured commonly to the cell or commonly to the group. If this approach is used, the grant-exempt resource (if configured in a shared resource way) can be fixed regardless of GCCC. An example of such a configuration may include the configuration of a sidelink resource or reserved resources commonly used by the cell. In other words, in terms of priority or determination of resource availability, certain resources common to the cell (which can be configured by SIB or signaling common to the cell or preset) may have higher priority than the dynamic common signal and / or specific configuration for HUH. Another example of such a configuration can include PRACH. Since CSIRS can be configured specifically for UE, it can be affected by GCCC.
(5) A subset of partitions / subframes can be configured in which the common signal may not be transmitted or the common signal may not be affected. For example, a set of fixed DL partition / subframes and fixed UL partition / subframes can be configured, and dynamically the partition type can be indicated periodically or aperiodically. Even though the type of partition can be applied during the periodicity between intervals in which the signal is transmitted, the configured subframe / partitions can remain the same (that is, not affected by the common signal). In another example, a set of subframes containing common search space and the shared RS in which the shared RS can be present can be configured, regardless of the presence of the common search space.
(6) Fallback
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37/89 [0117] When signaling is a periodic transmission, if any signaling is received during the period, the fallback can be performed based on a configuration common to the cell or semi-statically configured or specific to UE or configuration common to the group. When signaling is an aperiodic transmission, it can temporarily replace the semi-statically configured configuration. Otherwise, the semi-static configuration can be applied. Alternatively, regardless of periodic, semi-static, a subset of partitions / subframes can be considered that the common signal is not effective. This is for RRM, PRACH transmission, etc., from RRCJDLE UEs.
[0118] In accordance with an embodiment of the present invention, the indication of a common signal in the case of multiple beams is proposed. For multiple beams, at least one of the following aspects can be used with group-specific or cell-specific signaling. In the case of multiple beams, the GCCC can potentially be transmitted with beam scanning where each beam is transmitted in a subset of OFDM symbol (s) within a partition. For each beam, the OFDM symbol set (s) can be configured and the set can indicate potential OFDM symbol (s) in which the configured beam-based GCCC can be transmitted, or OFDM symbol (s) exact (s) in which the configured beam-based GCCC can be transmitted.
[0119] In terms of configuration, a UE can be configured with multiple control feature sets. Each set of control features can be mapped to one or more OFDM symbols where a UE is expected to monitor the configured beam. In other words, multiple bundles can be configured for multiple sets of resources. For each beam, the maximum or minimum size can be known or prefixed or semi-statically configured and a UE can be expected to monitor multiples of that. A set of control features associated with a beam can be called a set of beam control features (BCRS).
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A UE can be configured with one or multiple BCRS. In each BCRS, a UE can be configured with one or more OFDM symbols in which the specific beam can be expected. For each BCRS, the same or different beam can be assigned. For example, a different TRP can be used for each BCRS to which a different beam is assigned. A UE can monitor these BCRS time / frequency resources configured for each pool. To allow full flexibility on the network side, the network can configure very large time resources (for example, a partition or maximum number of OFDM symbols where a symbol contains a beam control region). In that case, blind EU decoding can be considerable.
[0120] To minimize UE complexity, each OFDM symbol configured for BCRS can contain a signal. The sign can indicate at least one of the following.
- Beam identity (ID): According to the current symbol that transmits the control signal for a given beam, the signal can be scrambled with the beam ID to indicate which beam is used in the current OFDM symbol. If the signal is not detected, a UE can stop decoding the target OFDM symbol. The beam ID can be indicated through the CSI-RS resource index and a UE can know the near-colocalization relationship (QCL) between the CSI-RS resource and each transmission beam through configurations.
- The presence of GCCC in the symbol: The signal can also be transmitted with the beam, and if the UE detects the beam, the UE can try to decode the symbol. In this case, the presence of GCCC or whether the symbol was used for the transmission of GCCC can be indicated.
- Beam ID, and number of blind detections required: In addition to the beam ID, the number of blind detections per symbol can also be indicated.
- {beam ID, DL grant, part of DL data region}, and / or {ID of
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39/89 beam, UL grant, UL data region part} and / or {beam ID, associated time resource}: Another indication can be made to indicate which piece of data will be used for DL or UL depending on the type. The data region part can be indicated from a pre-configured set (through semi-static signaling) of possible locations within a partition or across multiple partitions covered by the current control signal. The common signal between scheduling DL and UL can also be considered. When the time resource is indicated, additional scheduling within that time resource can also be considered.
[0121] The following description shows some examples of a common signal in cases of multiple beams. The indication of single beam can be made by beam for multiple beams, without loss of generality.
(1) Case 1: Indicates which OFDM symbol (s) should be read for the control channel [0122] The beam index for the next OFDM symbol set (s) can be indicated on each OFDM symbol. The signaling frequency can be each OFDM symbol or some OFDM symbols depending on the size of the BCRS.
(2) Case 2: Indicates candidates for blind search space detection in each OFDM symbol [0123] The number of candidates in which a UE is supposed to perform blind detection can be indicated in each OFDM symbol. Regardless of the beam index, a UE can search for candidates or can be combined with the beam index. In terms of signaling, the same can be the actual number or the search space ratio or the number of candidates compared to the standard / configured values.
(3) Case 3: Indicates the DL portion or the UL portion associated with the control channel
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40/89 [0124] When the beam index is indicated on the signal, it can also indicate the associated DL or UL potion within a partition or across multiple partitions. If the signal is made by partition or by multiple partitions it can be configured by the upper layer or dynamically indicated in the signaling. The indication can indicate one of pre-configured patterns or sets. Also, the indication can only configure the start / end of each region. The data region can exist without any associated control region. In this sense, it is also possible that, instead of signaling the DL or UL portion associated with the control beam, the indication can simply indicate the DL portion or the UL portion within a partition or within multiple partitions. Two pieces of information can also be displayed independently. With this information, the following can be applied.
- CSI-RS transmission: The CSI-RS position can be fixed in relation to the end of the DL portion. If the DL portion changes due to some reasons, for example, the reserved resource or UL resource, the actual position of CSI-RS can be changed. Alternatively, CSI-RS cannot be transmitted within a unit (partition or multiple partitions depending on the configuration) if the DL portion size is smaller or does not cover the CSI-RS position.
- SRS transmission: Similar to CSI-RS, the SRS can be fixed in relation to the beginning of UL or end of the UL portion. Or, the UL portion can determine whether or not to transmit the SRS.
- Any periodic RS: If the tracking RS is adopted, similar to CSIRS, different approaches can be considered.
[0125] In terms of duration, it can be determined implicitly based on the OFDM symbol index on which the control is performed. For example, the portion of DL or UL per beam can be virtually divided based on the maximum number of beams per partition / multiple partitions, and the control channel index in terms of
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41/89 OFDM symbol can be used to index the DL or UL portion within the partition / multiple partitions.
(4) Case 4: Indicates the beam index used in the control channel [0126] Simply, the beam index used for the OFDM symbol (s) can also be indicated.
(5) Case 5: Enables or disables any semi-statically configured information [0127] Another approach is to allow the timely signal that can enable or disable semi-statically configured information. Activation or deactivation can be applied only to the partition / multiple partitions where the signal is applied or the effectiveness can continue. In the case of the latter, reliability can become an issue that requires repeated signaling. In this sense, when the timely signaling is used, it can be restricted only to the partition / multiple partitions (ie, temporary activation / deactivation). For example, temporary deactivation can also be transmitted, and UE can expect that the periodically configured CSI-RS or SRS transmission can occur if the deactivation signal is not detected (or temporary activation can also be considered). This serves to support the temporary suppression of resources due to some coordination or manipulation of resources compatible with newer versions, etc. Similarly, for OFDM symbols semi-statically configured for a beam index for control channel monitoring, if any signal to disable the symbol is detected, the UE can skip decoding the symbol.
(6) Case 6: DL / UL pattern within one partition / multiple partitions [0128] Which DL / UL pattern is used within one partition or multiple partitions can be indicated. For example, if a partition or multiple partitions is divided into four small mini-partitions, the DL / UL configuration (for example 2: 2) can be indicated by a common signal for each beam.
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42/89 [0129] Figure 5 shows an example of standard indication of DL / UL by common signal according to an embodiment of the present invention. In Figure 5, a UE is configured with a set of BCRS. In each BCRS, at least one of a beam index, SS frequency / duration location, multiple candidates or related hash function can be indicated. In addition, in Figure 5, two partitions are divided into a control region and four small mini-partitions. In this case, the DL / UL standard (or, configuration) can be indicated.
[0130] The beam index discovered / used during beam management / initialization can be used for the control channel.
[0131] When the beam index is signaled, a channel / signal can contain more than one beam index since the signal can be targeted for more than one beam. For example, for UEs without DL / UL scheduling, control channel monitoring may not be necessary. However, some indication (for example, activation / deactivation) may be useful. To support this, the beam indexes can be grouped and the signal can be transmitted by group of beams instead of by beam. The indication of activation / deactivation or another channel / common signal can be transmitted in addition to this signal. For example, the first signal can indicate whether there are any channels / control signals in the current OFDM symbol. This can be done by transmitting the beam group or beam ID in each OFDM symbol (based on the size of the unit the signal is transmitted in, each OFDM symbol or some OFDM symbols). Once detected, the additional control can include additional necessary information (for example, activation / deactivation) per beam.
[0132] The single beam case can be treated as a special case of a multiple beam case with one beam. In other words, all the mechanisms applicable in the case of multiple beams can also be applicable in the case of single beams.
[0133] According to an embodiment of the present invention, the indication of
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43/89 common signal in the case of single beam is proposed. A common signal purpose similar to the case of multiple beams can be considered for the case of single beams. In the case of multiple beams, the beam index can be used as a group index. In the case of a single beam, a separate group ID, which can be divided by sub-band or by UE groups, depending on usage scenarios, etc., can be defined. Additional bundling within a bundle or bundling bundles into multiple bundles can also be considered.
[0134] Applying to the case of single beam and the case of multiple beams, a motivation to adopt the common signal is to indicate the type of allocation and / or granularity of resources.
[0135] According to an embodiment of the present invention, the relationship between the beams is proposed. In the present invention, it has been mentioned that the beam index can indicate whether the UE should read the control channel or indicate any possible DL or UL region associated with the beam index. However, actual information to indicate the beam index may differ depending on various operations. The following description can be some examples to indicate the beam index.
- Alternatively, in the case of multiple beams, resources can be defined for GCCC with beam index (s) that a UE is configured to monitor. Otherwise, resources can be considered as flexible resources unless the UE is scheduled. In this sense, some semi-static configuration may not be valid for flexible resources if they are configured for this.
- CSI-RS resource index: If a UE is configured with multiple CSI-RS resources and data transmission associated with one or more CSI-RS resources occurs, similarly, the CSI-RS resource may be associated with a control channel. In other words, a UE can be configured with one or more CSI-RS resource indices that are monitored by the UE. A different CSI-RS resource can be configured with different characteristics such as
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TRP, different blank resource set (semi-statically configured), control resource set configuration (only time domain or only frequency domain or time / frequency domain). For a common search space, standard CSI-RS configuration / feature indexes can be used, or no explicit settings can be used.
- beam index from measurement RS: The beam index used in the measurement RS can be used as the control channel beam index. The measurement RS can be based on the reference signal or synchronization signals.
- The OFDM symbol beam index in which the corresponding pre-coded measurement RS is transmitted: The symbol index or SS block index in which the synchronization and / or measurement RS was transmitted with the corresponding beam can be used as beam index of the control channel.
[0136] More specifically, the following description may be some procedure for acquiring the beam index for monitoring the control channel, and its associated feedback.
(1) Multiple SS blocks can be transmitted and each SS block can contain a single beam. Based on the initial cell search and measurement based on the signals transmitted in each SS block, a UE can determine the best transmission beam (s) (TX) and the transmission beam (s) corresponding reception (s) (RX) for each best TX beam. The beam index can be inferred from the SS block location, SS block index, or separately indicated for each SS block. In this case, a UE can assume that the best selected TX beam can also be used for control channel monitoring. For a common search space, an UE is expected to monitor the control channel on a given TX / RX beam pair (s) that is / are discovered during the initial access. The beam pair for each common search space for initial access can be configured as follows.
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- RAR: Reciprocity may or may not be assumed. When reciprocity is assumed, the corresponding RX beam based on the TX beam can be used for PRACH transmission, and the TX beam selected for PRACH transmission can be used for RAR reception. In order for the RX beam to receive the TX beam, the best RX beam selected by the UE in the initial access procedure or in the synchronization signal detection procedure, or already known RX beam can be used for the supplied TX beam .
- Msg 3: The TX beam of a UE can be explicitly indicated by RAR or a UE can select the best beam similar to the beam selection for PRACH. The RX beam to receive Msg 3 can also be determined based on the PRACH / RAR procedure. UCIs transmitted with Msg 3 can be transmitted in the same beam direction or can follow the PRACH beam direction. If the Msg 3 beam index is explicitly indicated and the transmission of UCI and PUSCH occurs independently, the beam used for the transmission of PUSCH and UCI can be different, and the UCIs can be transmitted to the same beam index in which the PRACH was broadcast. If PRACH is transmitted with multiple beams, UCIs can be transmitted only with the best beam.
- Msg 4: Without any additional configuration, the same beam index can be used between RAR and Msg 4. With the HARQ-ACK feedback in Msg 4, Msg 3 can conduct CSI feedback which can be used to further refine plus the beam for each EU. In this way, the beam index used for the UE can be additionally reconfigured after or during Msg 4.
(2) The SS block index can be defined, and the SS block index can indicate the associated RAR / Msg4 timing TX / RX beam pair implicitly without any further association. The preset timing relationship between the PRACH TX beam and the RAR TX beam can exist so that a UE can expect to receive the RAR TX beam at a given position
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46/89 without additional configuration. Similarly, the beam used for PRACH / Msg 2 can be used for Msg 3/4. For the Msg 4 search space, the fixed time between Msg 3 and Msg 4 can be used. This way, a UE may not need to monitor multiple search spaces. Or, the common signal mentioned in the present invention can be used to indicate the beam index used in each SS so that a UE can ignore decoding if the beam index is not correlated with the corresponding beam.
(3) The same beam used for the reception of PBCH or the beam associated with PRACH (that is, TX beam of gNB corresponding to the beam of PRACH TX of the UE) can also be used for the reception of control channel at least for common control data. For the PBCH, if it is different from the synchronization signal, it can be indicated by the UE. This value can be used as a default value until reconfiguration occurs.
[0137] Figure 6 shows an example of a procedure acquiring a beam index according to an embodiment of the present invention. When reconfiguration occurs for the USS, or the group search space, in each search space, the associated beam index (or CSI-RS resource index) can be indicated. A UE, configuring one or multiple search spaces or set of resources, can monitor one or multiple beams. For each beam index (or CSI-RS resource index), the UE can know the best RX beam through beam management. In terms of search space or feature set configuration, a UE can be configured with the time feature or the time feature which is the feature set for maximum control over time.
[0138] More specifically, the beam index or beam used for the transmission of control may consist of a subset of CSI-RS resources. For example, 1 or 2 CSI-RS ports can be used for the transmission of control, or a certain pre-coding can be used. In each case, the
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47/89 number of ports can also be configured for each set of control features. This can be useful when spatial multiplexing is applied between different control channels. When the beam index or related information is not configured, a UE can assume that the beam index discovered during the initial access procedure can also be used for the control channel or a single beam is used on the network.
[0139] Hereinafter, several aspects of GCCC are proposed according to the modalities of the present invention.
1. Physical channel used for GCCC [0140] When GCCC is transmitted and / or received in a timely manner, it may not be desirable to prefix the resources for GCCC. Since a control channel decoding can occur after GCCC detection, if GCCC is transmitted on a predefined resource, GCCC can punch a control channel. Or, the presence of GCCC can be implicitly determined by the detection of GCCC, and depending on the presence of GCCC, the control channel mapping may be different, that is, the control channel can be matched to the rate or the group mapping of resource element (REG) can be changed.
[0141] Alternatively, GCCC can be transmitted via a group search space or search space common to the cell or UE search space. In this case, the aggregation levels for GCCC can be configured through an upper chamber or broadcast configuration (for example, SIB). This can be particularly useful if the size of GCCC content is very different from other DCI sizes (and therefore increases the number of blind detections). Additionally, when a reliability requirement between regular DCI and GCCC is different, a different level of aggregation seems necessary. Finally, it can also be useful when GCCC is mapped to partial OFDM symbols in the SS control region where GCCC can be transmitted. If multiple OFDM symbols
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48/89 are configured for SS where GCCC is also transmitted, the GCCC mapping can be restricted to the first or two OFDM symbols to reduce latency. In that case, the following mechanisms can be considered.
- Regardless of the size of the SS control region where GCCC can be transmitted, GCCC can always be mapped to one or two symbols only. In other words, in the case of GCCC mapping, except for one or two symbols, the control channel can be matched to the rate in other OFDM symbols. Since it can reduce the available resources on which GCCC is mapped, increased levels of aggregation can be used. The level of aggregation can also be increased automatically. For example, if the control region transposes two OFDM symbols while GCCC is mapped to an OFDM symbol, and REGs in a CCE are preferably evenly distributed within the control region, the aggregation level for GCCC can be doubled to compensate for the resources mapped in the second OFDM symbol. This can also be addressed by an explicit upper layer configuration of aggregation levels used for GCCC. Alternatively, when GCCC is configured, the number of OFDM symbols where GCCC can be mapped can be configured by an upper layer. Depending on the information, the aggregation levels can be automatically defined. If the number of OFDM symbols where GCCC can be mapped is equal to the size of the control region, the same set of aggregation levels configured in SS can also be used for GCCC. Or, the same set of aggregation levels for a common group search space can be used for GCCC. If a smaller number of OFDM symbols are used compared to the search space, the aggregation levels can be doubled, and an additional aggregation level can be monitored.
- Separate feature set can be configured for GCCC
- Different REG-CCE mapping (restricted to one or two symbols of
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OFDM) can be considered.
2. Handling of carrier aggregation (CA) environments [0142] In NR, different CA environments can be considered as follows.
(1) DL and UL can be configured from a different frequency band. From the carrier frequency band perspective, although a UE is served through only one carrier, DL and UL can be treated as if they were aggregated by carrier.
(2) Multiple carriers can be added to support a broadband operation (3) Interfrequency or intrafrequency band CA can be considered.
[0143] When CA is used, GCCC transmission becomes a little more challenging, particularly when a UE does not monitor a common or group-common search space in a secondary cell (SCell). Particularly, when a different carrier is configured for DL and UL separately, seen and different UEs can be configured with a different UL carrier although they share the same DL, the common signal needs to be clarified. The following mechanisms can be considered for CA environments.
(1) When a group search space or GCCC is transmitted, a separate GCCC can be transmitted by DL / UL pair. A different DL / UL frequency band can be configured. However, this can lead to excessive overload if UEs are configured with different DL / UL frequency bands.
(2) A common signal can be transmitted separately for DL carrier and UL carrier. For a DL carrier, scheduling / transmission from the same carrier can be used, while for a UL carrier,
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50/89 cross-carrier scheduling / transmission can be used.
(3) A common signal can only be transmitted to a carrier carrier so that any common signal is not supported for cases of cross-carrier scheduling or a different DL / UL carrier combination. This may also include an FDD case. For an FDD case, the paired DL and UL can be the same carrier from the GCCC scheduling / transmission perspective. In this case, although a UE is scheduled with cross-carrier scheduling, for a common signal, the UE can monitor a search space common to a group on a self-carrier. Still in this case, if UL is in a different frequency band, unless the pairing is specified as a common cell pairing by broadcasting signaling, for example, through PBCH / SIB, any signaling on UL carrier may not be supported . If a different frequency band pairing between DL and UL is achieved through broadcasting common to the cell, the signaling can be interpreted for the paired UL as well. UEs configured with a different UL carrier from cell-matched DL-ULs can ignore UL related settings.
(4) A common signal can be transmitted either by scheduling a carrier carrier or scheduling a cross carrier. A separate or combined indication for multiple carriers may be possible. If GCCC is configured only and a subset of carriers among configured aggregate carriers, signaling can include information for multiple carriers.
[0144] Particularly for intra-band CA, the same configuration applies to all carriers in the same frequency band if a UE is indicated that the configuration can be the same. In other words, if the network configures the same configuration among intraband carriers, the network can inform UEs about it, and the UE can assume the same configuration. This can be accomplished by mapping the configuration of multiple carriers to the same
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51/89 partition (SFI) when multiple SFIs are given by GCCC. Otherwise, a UE may not assume the same configuration. In particular, fixed DL subframes / partitions may differ by carrier even in the case of intraband CA.
[0145] More specifically, if a UE is configured with multiple specific carriers in the EU on one carrier from a network perspective, a UE can monitor GCCC and a specific EU carrier (or subset of specific EU subcarriers) from specific EU carriers configured. The UE can assume that the same configuration applies to other specific carriers in the UE. Even when a UE monitors GCCC on multiple specific carriers the UE on a carrier, the same setting can be used unless some advanced feature (such as full duplexing or FDM between DL / UL is supported) is used or unless otherwise noted. In that case, although a UE can be configured with a specific carrier to multiple DL UE, the UE can only be configured with a specific carrier to UL UE. For specific EU UE carriers not configured, information carried by GCC can be ignored. If a UE is configured on a specific carrier the DL UE and specific carrier the corresponding UL UE is not configured, the GCCC information for UL can be applied to the specific carrier the configured UL UE. If a different configuration is applied to each specific carrier in the UE, the UE can assume that the network can configure a specific carrier in the UE appropriate for GCCC monitoring. The specific EU carrier where GCCC is monitored can be configured by a higher layer than a UE or group of UEs, particularly when a UE is configured with multiple EU specific carriers on an NR carrier. This can be accomplished by configuring a mapping between SFI in GCCC (such as an entry in multiple inputs on the channel) and one or more carrier indexes configured to a UE. In other words, this mapping can be specific to the EU. If the mapping is not given, a UE
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52/89 can assume that a carrier with the DL / UL associated in an unpaired spectrum is mapped.
[0146] Additionally, a UE can be configured with multiple carrier groups for GCCC. In each carrier group, the same configuration can be assumed, including an indication of partition type from GCCC and / or fallback configuration. When carrier groups are configured, which carrier is used for GCCC transmission can also be configured. In other words, a representative carrier for transmitting GCCC can be additionally indicated by carrier group.
(5) When a GCCC transmission is not available due to a cross carrier scheduling configuration or a different UL frequency band configuration, etc., the UE can assume that a semi-static configuration can always be applied and possibly assisted by a EU-specific dynamic signage. If this is not available, the carrier (UL carrier only or DL carrier only or DL / UL carrier) cannot be configured with GCCC, and features can be flexible.
(6) A common signal at least for indicating the type of partition can only be transmitted to TDD carriers. If a flexible duplexing operation is achieved on an UL FDD spectrum, a common signal for UL where a TDD operation is achieved can be transmitted. Another common signal can be transmitted to DL or UL or DL / UL depending on the contents. For example, in the case of a puncture indication, it may be more desirable to indicate only for DL, and the size of the control region may also be indicated only for DL [0147] When a supplemental UL carrier (SOUTH) is configured for a DL / UL carrier, GCCC can be transmitted separately between a DL / UL carrier and a SOUTH carrier. When a different numerology is
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53/89 used between DL / UL bearer and SUL bearer, the following can be considered for SFI for SUL bearer.
- The partition format can be based on the DL carrier where SFI is transmitted. Correspondingly, the partition type for SOUTH carrier can be determined (for example, if 2 15 kHz subcarrier spacing OFDM symbols in DL are used, 4 30 kHz subcarrier spacing OFDM symbols in carrier SOUTH in DL are used).
- The partition format can be based on the SOUTH carrier that can be configured to the UE. In terms of the interpretation of the partition format for SOUTH, one can consider a numerology of a SOUL carrier.
- Similar manipulation can also be assumed when DL and UL use different numerologies. In other words, when DL and UL use different numerologies, a separate SFI can be transmitted to DL and UL respectively, even in an unpaired spectrum case.
[0148] In general, for DL, GCCC can be applied to the DL carrier if a carrier carrier transmission is used, and / or the same carrier where GCCC is transmitted if a cross carrier schedule is used (for itself), and / or the DL bearer indicated by a cross bearer schedule, and / or all the EU-specific DL bearers in an NR bearer, and / or all DL bearers in contiguous intra-band bearers. For UL, GCCC can be applied to the UL carrier if a self-carrier transmission is used, and / or the UL carrier paired with a signal common to the cell and / or by specification with a DL carrier where GCCC is transmitted, and / or all EU-specific UL subcarriers in an NR carrier, and / or all UL carriers in contiguous intra-band carriers. For cross carrier scheduling, a separate carrier index can be used for DL and UL, and therefore cross carrier for UL may also be possible regardless of the DL carrier. Or the
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54/89 paired UL carrier for the scheduled DL cross carrier can be used. If the latter is used, the carrier index can be used for a DL-UL paired carrier or DL-only carrier. In the case of TDD on the same frequency band, the same frequency can be paired on the same frequency. If a GCCC cross carrier schedule is adopted, and a different numerology is used between a schedule and a scheduled carrier, scheduling can be done on the first partition, where a partition boundary between carriers is aligned only. Or, if a schedule occurs in the middle of the partitions corresponding to a partition with a smaller subcarrier spacing, the setting can be applied to the next partition.
[0149] In accordance with a modality of the present invention, it is proposed to handle the case of scheduling CA and cross carrier. When a partition type indication is considered to involve both DL and UL, some clarification may be needed, particularly if different UEs are configured with a different UL carrier while sharing the same DL carrier. For example, as discussed in LTE-NR coexistence, an LTE UL spectrum for NR UL transmission can be used to obtain better coverage. In that case, instead of using a paired UL spectrum or the same spectrum as the DL spectrum, a UE can use a different UL spectrum. In this case, if an UE can assume the type of partition indicated also for the UL spectrum or does not need to be clarified. Additionally, when a UE is configured with a cross-carrier schedule for a carrier, if GCCC can be transmitted from the same carrier or scheduling carrier it may need further discussion.
3. Fallback behavior [0150] When a partition type is indicated by a common signal, the fallback operation needs to be clarified. Since a partition type can include
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55/89 a different length than DL, UL, reserved portions, a fallback configuration needs to be carefully considered, particularly for UL transmission. The following mechanisms can be considered.
(1) Dynamic signaling can include a larger DL portion, and can indicate the same UL portion compared to the fallback configuration. For DL, a UE without detecting the common signal can miss the transmission of RS in the DL portion increased by dynamic signaling. If a UE is configured with aperiodic CSI-RS reporting, a UE can assume that CSI-RS is transmitted despite losing the dynamic common signaling, and a fallback setting can indicate no potential metering RS transmission on the partition.
(2) Dynamic signaling can indicate a smaller DL portion, and can indicate the larger UL portion compared to the fallback configuration. For DL, a UE without detecting a common signal can assume that the transmission of RS can occur in the partition. Since the network did not transmit RS on the partition, this can affect the measurement performance of the UE. Particularly for RS used for aggregate measurement such as RRM, periodic CSI-RS, the transmission of RS can occur in the fixed DL portion and the fixed DL portion cannot be changed by dynamic signaling. In other words, there may be some overlapping part for DL between fallback configuration and dynamic signaling so that a UE can assume that the UE erroneously detects a common signal if the common signal indicating fixed DL portions is changed to UL or reserved.
[0151] For UL, a UE can assume that a long PUCCH format can be transmitted if a common signal has been received. Otherwise, the UE can assume that a short PUCCH format can be transmitted. If a PUCCH format is dynamically selected depending on the type of partition, some additional considerations may be necessary. For example, a long PUCCH format can be designed so that it can be rate-matched to
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56/89 around the short PUCCH features. Alternatively, to address a missing case, a long PUCCH format can be activated only if UL only or UL heavy partition type are semi-statically configured, which may not be changed by dynamic signaling or dynamic indication in the schedule (in other words, DL agenda DCI can also include a PUCCH format between long and short). If long PUCCH resources are reserved, a set of subframes / partitions can be centric to UL / heavy or UL partitions. In terms of indication of dynamic signaling, these resources / partitions can always be indicated as centric to UL or UL partition. However, the network can change the partition to DL centric or DL heavy as if there was no expected PUCCH transmission. Therefore, for UL, it may not be so fundamental to assume that a subset of subframes are fixed to UL's centric or UL partition. Regardless of the settings, a UE can assume that a partition type is UL or UL weighed if a long PUCCH is configured to be transmitted. Since a different long PUCCH format size can be used in a different UL portion length, when a long PUCCH format is configured, the long PUCCH format size can be configured. Alternatively, when a DL transmission occurs, the exact length or format of long PUCCH can also be indicated, and the network can configure a set of PUCCH formats including long PUCCH formats and dynamically indicates the exact format. If multiple ACK / NACKs are transmitted in the same format, the same format can be indicated for each DL transmission.
(3) A dynamic signal can indicate the entire DL, while a fallback configuration can include a portion of UL. It is possible that a UE scheduled with periodic SRS, etc., can transmit on the partition if it loses a common signal.
(4) A dynamic signage can indicate the entire UL, while a
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57/89 fallback configuration can include portions of DL and UL. It is possible for a UE to expect some DL measurement RS transmission on the partition if it loses a common signal and measurement RS is configured to be transmitted on the partition.
(5) A dynamic flag can indicate a reserved resource, while a fallback configuration can include portions of DL and UL. It is possible for a UE to expect some DL measurement RS transmission on the partition and / or a UE can also transmit any scheduled UL transmission such as SRS if a common signal is lost and the measurement RS is configured to be transmitted on the partition.
[0152] In terms of producing a fallback configuration, the following approaches can be considered.
(1) The semi-static DL / UL configuration (for example, LTE TDD DL / UL configurations with a special subframe configuration) can be used. If a common signal is missing, the partition can be considered as DL or UL or a special subframe. In this case, a reserved resource can be protected only by scheduling.
(2) A DL partition can be assigned as a partition that requires a fallback configuration due to the missing common signal. In that case, a UE can assume a DL measurement even though the network cannot transmit any DL transmission. This can lead to inaccurate measurement performance. In this sense, if this approach is used, it is highly desirable that the measurement be transmitted in portions of fixed DL that may not be altered by a common signal. To minimize the case of measurement computation error, it is also possible that only a minimum portion of DL may be able to schedule DL. Data can be scheduled where a UE can take on even more DL resources available by scheduling. To minimize the case of non-transmission of UCI, it is possible that a minimum UL portion is also assumed if a UE is scheduled ACK / NACK on the partition, it can transmit ACK / NACK.
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58/89 (3) A UL partition can be assigned as a partition that requires a fallback configuration due to the missing common signal. If a UE behaves differently on the UL partition compared to centric to UL or centric to DL (for example, using a different PUCCH length, PRACH format, etc.), it may be necessary to design the PUCCH / PRACH used on the UL partition not to interfere in the transmission of PUCCH / PRACH in centric to UL / centric to DL. For example, separate features for PUCCH / PRACH transmission can be configured depending on the length / format.
(4) A reserved partition can be assigned as a partition that requires a fallback configuration due to the missing common signal.
(5) A semi-static DL / UL configuration or DL / UL partition type can be configured to a subset of partitions and fallback can occur after the semi-static configuration. In other partitions / subframes, an option among (2), (3) or (4) mentioned above can be used.
(6) Semi-static DL / UL partition type settings can be used. Similar to the DL / UL configuration, a partition type set for each partition across multiple partitions can also be configured semi-static.
[0153] More specifically, when a UE is configured with a long PUCCH format on a carrier and partition type can be dynamically changed, the following mechanisms can be considered.
(1) A UE can transmit a long PUCCH format on a partition based on the PUCCH timing configuration regardless of the common signal indication and / or semi-static configuration. In other words, if the UE is indicated to transmit a long PUCCH format, regardless of the common signal / fallback operation, the UE can transmit a long PUCCH format in a given partition.
(2) A UE can transmit a long PUCCH format only on one
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59/89 partition that is indicated as a UL or UL centric partition by dynamic signaling (or by a fallback operation if a dynamic signaling is missing). Otherwise, a UE can switch to a short PUCCH format or omit PUCCH transmission.
(3) A UE can transmit a long PUCCH format only on a configured subset of partitions that are configured that they can carry centric channels to UL such as a long PUCCH format. In other partitions, regardless of the partition type, a UE can transmit a short PUCCH format. Alternatively, a UE can be configured with a subset of partitions / subframes where a long PUCCH format can be transmitted (and / or short PUCCH can be transmitted).
(4) A fallback configuration can always be followed by the long PUCCH format. For dynamically altered centric and UL partitions, the long PUCCH format may not be allowed (that is, a short PUCCH format is preferably used).
(5) A different size of long PUCCH format can be used after the fallback configuration. The maximum UL portion granted per fallback configuration can be used for PUCCH transmission on each partition. If more than one UL portion is granted by GCCC, additional UL portions can be used for non-PUCCH transmissions (for example, aperiodic SRS, PUSCH, etc.). This is particularly true if a PUCCH length is semi-statically configured or a PUCCH length is not dynamically changeable. This can be true even if a fallback configuration is not given for a DL / UL partition type in general. Alternatively, the PUCCH length in each partition can be semi-statically configured. A set of partitions used for a long PUCCH format with a certain length can be configured and multiple sets from that list can be configured to a UE or
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60/89 group of UEs or specifically to the cell.
(6) a length of PUCCH can be dynamically indicated by DL scheduling DCI, and the UE can always follow a length indicated by scheduling DL. GCCC can indicate a smaller or larger portion of UL that may be of lower priority compared to a dynamic indication. In other words, a UE can expect PUCCH resources to be dynamically indicated in a resource that is indicated as a DL resource or resource unknown by GCCC. Similar to dynamic DCI, the same can always be assumed that the same information by dynamic signaling is used. Semi-static features, such as SR, CSI feedback, or HARQ-ACK for corresponding SPS (if any), can be replaced with dynamic GCCC. In this case, if a semistatically configured PUCCH resource length is greater than the UL resource indicated by GCCC, it can be configured as an invalid resource. Or, multiple PUCCH formats can be configured and a format that has the longest length embedded within the indicated UL feature can be selected.
[0154] Alternatively, the fallback option may be different depending on how the indication is used. If GCCC serves to handle neighbor cell interference, a UE can use a DL partition for a fallback option when GCCC is missing.
[0155] An example of fallback is as follows. Except where flagging is purely additional flagging, some fallback behavior needs to be defined to handle a missing GCCC case. An example of a fallback operation is to use semi-statically configured partition types, which are applied / assumed if GCCC is missing. In addition, if a partition type indication changes the duration of UL portions, it needs to be clarified how PUCCH is transmitted. One approach is to assume that the fallback configuration is always a subset of dynamically indicateable portions of UL
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61/89 (except where it is configured as a DL only subframe) so that a UE can transmit a PUCCH on the resource following the fallback configuration. If this approach is used, regardless of UL portions configured by GCCC, limited UL resources may be available for PUCCH transmission.
[0156] Figure 7 shows an example of a fallback operation according to an embodiment of the present invention. Referring to Figure 7, regardless of the indication of GCCC in the partition type, the PUCCH region can be unchanged to avoid any ambiguity between the network and UEs. Likewise, it may be desirable that a dynamic PDCCH does not indicate any smaller UL portion than the PUCCH regions.
[0157] For the fallback configuration, the DL minor and UL minor portion can be configured and other portions can be made flexible so that flexible resources can be indicated by the network for data and other scheduling. If this is used, for DL measurement, measurement RS may need to be transmitted in the smaller DL to avoid any ambiguity. A different partition can have a different partition type, and the smaller DL and the smaller UL can be used for a partition with DL and UL. In a flexible resource, the dynamically indicated resources can be valid, and some semi-static configuration can also be considered as valid (or depending on the configuration, the default behavior can also be configured if it assumes valid or invalid) under the condition of fallback.
4. Common signal resource configuration [0158] Assuming a periodic or aperiodic transmission of GCCC, GCCC can be transmitted through a common search space or common group search space. The aggregation level used for GCCC can be further restricted to the maximum aggregation level considering reliability. In a broadband system, there may be a multiple duplicate common search space and
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62/89 different UEs can monitor different common search spaces due to their limited bandwidth or bandwidth adaptation operation, etc. A UE that can monitor multiple common search space or resources simultaneously can acquire multiple copies of GCCC or can be configured to monitor only one common search space. If a UE can purchase multiple copies, the content needs to be equal across different sub-bands in broadband. Since a different subband can be equipped with different partition structures and / or numerology and / or resource allocation in DL, UL, guard period, and / or reserved resource, the relationship between GCCC and its effective bandwidth need to be clarified. The following approaches can be considered.
(1) Broadband can be divided into some sub-bands and each sub-band can have a search space specific to the independent cell (CSS). GCCC can be ported on each sub-band. GCCC can be applied to resources only in the corresponding sub-band.
(2) There can be multiple resource sets for CSS and a UE can be configured with a resource set for CSS for GCCC. In addition to the adjusted CSS resource configuration, the resource region where GCCC is effective can also be configured. Unless otherwise noted, GCCC can be applied to the entire system bandwidth.
[0159] In any approach, a UE needs to be configured with a search space in which GCCC can be monitored and the resource in which the GCCC is applied, implicitly or explicitly.
[0160] Another question is whether a UE is required to monitor a common search space or group-common search space for GCCC in each subframe, regardless of whether a UE is configured with a subset of partitions for control monitoring. The following approaches can be considered.
(1) An UE can monitor GCCC only on partitions where CSS / space
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63/89 group search (GSS) is configured to be monitored.
(2) An UE can monitor GCCC separately from CSS / GSS. In other words, if a UE needs to monitor GCCC on each partition, regardless of the control feature set or search space configuration, the UE can monitor CSS / GSS on each subframe or resources configured for monitoring.
[0161] In addition, a monitoring partition can be configured differently by resource set and / or search space.
[0162] In a broadband, due to the small supported bandwidth compared to broadband, there may be different defined sub-bands and different UEs can monitor different sub-bands. For example, if the system's bandwidth is 400 MHz, and a UE can nominally support up to 100 MHz, there may be 4 * 100 MHz in the system. To simplify the design, the UE X bandwidth (for example, 100 MHz) can be assumed to be nominal. UEs that support less than X cannot be optimized in the system design.
[0163] Bandwidth partitioning or subband formation can be propagated by PBCH and / or SIB. In terms of partitioning, the size can be defined as X. In each subband, the synchronization signals for cell detection and RS transmission required for measurement can be transmitted. PBCH and / or SIB can also be transmitted to support a PBCH / SIB update without requiring a UE to return to a different frequency. For each UE, a search space or control feature set (CORESET) where the UE can monitor GCCC can be configured.
[0164] Figure 8 shows an example of subband formation according to an embodiment of the present invention. Referring to Figure 8, in each subband with an X bandwidth, synchronization and / or PBCH / SIB signals can be transmitted with potentially different frequency, sequence. If X is
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64/89 small, there may be sub-bands without additional synchronization signals.
[0165] CSS in each sub-band can be configured so that all UEs can monitor CSS in the configured sub-band. If there are UEs with a lower bandwidth, a small bandwidth CSS can be configured. Likewise, if a UE can access multiple sub-bands, a CSS can be configured to the UE as a primary search space. Likewise, the resource allocation or resource region where CSS covers can be indicated. This is particularly necessary when GCCC is transmitted separately by sub-band, and an UE that can access more than one sub-band can only listen to one CSS. A UE can be configured that GCCC from CSS can cover multiple sub-bands or not. Alternatively, a UE needs to receive GCCC from each subband.
[0166] When a subband is defined, an anchor subband can carry an initial SS block that can be accessed by RRC-IDLE / INACTIVE UEs as well. For other sub-bands, an additional SS block can be transmitted with a different periodicity or the same periodicity compared to the initial SS block.
[0167] Sub-band information compared to SS block can be known / reported to the UE, and a resource can be allocated based on the sub-bands where a UE monitors. In terms of resource allocation / shuffling, the following options can be considered.
(1) PRB indexing can be performed locally in a subband. An UE that accesses multiple sub-bands can have an allocation of resources across multiple sub-bands with a sub-band index, and a shuffle can be performed separately for each sub-band.
(2) PRB indexing can be performed by system bandwidth, and scrambling can be done locally. In terms of resource allocation, a different number of PRBs can be allocated based on the sub-bands
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65/89 configured from a UE. And depending on the allocated bandwidth, different UEs may have different indexes of physical RB at first even though they are monitoring the same subband.
(3) PRB indexing and scrambling can be performed on a system bandwidth. Considering that the system's bandwidth may not be known to UEs, PRB indexing can be performed based on the indication to a reference point (for example, virtual PRB 0) assuming some maximum virtual system bandwidth RBs .
[0168] CSS, particularly CSS where a UE monitors GCCC, fallback, TPC, etc., can be configured by MIB / SIB or UE-specific signaling when a subband reconfiguration occurs. Alternatively, the same CSS configuration can be present in each subband, and an UE can assume the same configuration from the anchor subband CSS configuration except for the physical frequency location, and therefore no additional information may be necessary. CSS in a subband, however, can be reconfigured using PBCH / MIB. If PBCH / MIB reconfigures CSS for a subband, the following two mechanisms may exist.
(1) PBCH / SIB in each subband can carry all information from the entire subband CSS so that a UE can acquire the information from any PBCH / SIB in a subband.
(2) PBCH / SIB in each subband can carry information from the subband CSS data so that a UE needs to re-tune to a different subband to acquire PBCH / SIB.
[0169] In PBCH / SIB, the information of synchronization and / or transmission signals of sub-bands PBCH / SIB can be indicated so that a UE can acquire PBCH / SIB from the given PBCH / SIB. All information including the CSS configuration can also be given by a specific configuration to
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UE when re-tuning occurs. However, a subband PBCH / SIB can carry different CSS information. If a different PBCH / SIB is transmitted, a SIB update may still apply to all PBCH / SIBs in all subbands. A UE can acquire PBCH / SIB in any sub-band, since the contents are basically the same with some different options in terms of sub-band size, CSS configuration, etc., which are sub-band specific. Whenever an UE switches over to the subband, the UE may demand to acquire that specific information from the subband again.
[0170] Figure 9 shows an example of CSS formation according to a modality of the present invention. Figure 9 assumes the same configuration as Figure 8. PRB indexing can be based on SS block, at least when a PRB indexing occurs locally. RB indexing can start from the center of the SS block or PSS, and can be expanded to the size of the subband. When a UE is reconfigured with a different subband, the central location of the SS block or PSS center can be indicated with a subband size, which can define the resource mapping on the configured subband as well. Due to the channel scan, it may not be possible to place an SS block in the center of a subband. If these cases are considered, based on the indicated direct current (DC) subcarrier or center of an anchor subband from PBCH / SIB, the resource block can be formed locally on an anchor subband.
5. Resource allocation [0171] In NR, due to several reasons, a time resource may not be contiguously available. In this sense, the allocation of resources can be performed through dynamic scheduling, in the frequency and time domain, or only in the frequency domain or only in the time domain. In other words, NR can support multiple resource allocations. Correspondingly, a
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67/89 different granularity in terms of frequency or time resource may be allowed. For example, the size of the sub-band used for a frequency domain can be variable, or be configurable by upper layer signaling, or implicitly adapted depending on the change in bandwidth or other reasons (bandwidth restricted).
[0172] Additionally, it is possible to allow the indication of time and frequency resources or time resources only or frequency resources only. For example, when there is only one UE per beam in most cases, it may be desirable that all frequency resources (only available) are used for a single UE, which can eliminate the need for frequency domain resource allocation. If only a few UEs are allocated, all frequency resources can be divided into a few blocks (for example, the maximum number of schedulable UEs at one time), and then you can indicate how many blocks are assigned to each UE. The number of frequency blocks across the system's bandwidth for a given UE (ie from the EU-specific bandwidth perspective) can be indicated via upper layer signaling or dynamic signaling or by scheduling . In the same way, the assigned number of blocks can also be indicated and the allocation can be carried out in bitmap mode or in contiguous allocation mode. To accomplish this, the following approaches can be considered.
(1) Frequency blocks can be divided in a semi-static way, for example, based on the maximum possible number of UEs, so the allocation of resources of each block to the UE can be indicated either through bitmap or indication of start block /end.
(2) Frequency blocks can be divided into some candidate numbers (for example, 1, 2, 4 or maximum number of UEs), which can be dynamically indicated by scheduling (for example, first grant). The size of
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68/89 actual resource allocation may differ depending on the chosen candidate. For example, if 1 is selected, the allocation of resources in the next step in the frequency domain can be omitted.
(3) Some patterns can be defined and a pattern can be indicated. For example, standards may include {(full bandwidth), (upper half bandwidth), (lower half bandwidth), (upper quarter bandwidth, upper two quarter bandwidth, upper three-quarter bandwidth, upper four-quarter bandwidth), etc.}. In other words, the combination of the number of frequency blocks and the allocation can be performed. The set of standards can be configured per top layer, and the bandwidth size can also be configured to the UE. Similarly, for a time domain resource, the following approaches can be considered.
(1) Unless otherwise configured (via semi-static signaling), a UE can assume that all portions of DL are available for receiving DL data. In that case, a UE can only be configured with a number of partitions where a transport block (TB) is spanning.
(2) An UE can assume that all resources may not be used for data transmission. Only time resources indicated by scheduling DL or granting UL may be valid for DL or UL. In this case, the referral mechanism can be as follows.
- Bitmap to indicate the OFDM symbols available in a partition or in multi-partitions: The size of multi-partitions can be configured by top layer, or indicated by DCI.
- Contiguous: For example, start and duration of data transmission can be indicated by DCI.
- Time domain resource block group (RBG) concept: OFDM symbols can be grouped with a time domain RBG, and a
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69/89 individual resource mapping for each time domain RBG can be considered. An example of a time domain RBG is to use a mini-partition size. The mini-partition size can be configured per top layer. In each time domain RBG, an independent bit can be used to indicate whether the time domain RBG is used for scheduling or not. To minimize changing the dynamic size of the time domain RBG when dynamic and multi-partition partitions are used for scheduling, the size of the time domain RBG can be adapted depending on the number of partitions used. For example, if a partition is used, the time domain RBG size can become 2 OFDM symbols. If 2 partitions are used, time domain RBG size can become 4 OFDM symbols. If 4 partitions are used, the time domain RBG size can become 8 OFDM symbols. Instead of the bitmap of each time domain RBG, similar to the frequency domain resource allocation, in each time domain RBG, one or more OFDM symbols can be selected for scheduling by adding a few bits that are commonly applied to all time domain RBGs.
[0173] If a time domain resource allocation is also used, it can be used to indicate multiple null resources due to various reasons. An example is not to map data in CSI-RS resources that are destined for different UEs from the UEs scheduled in the resource. Another example is to avoid a legacy LTE-protected region such as a cell-specific reference signal (CRS), PDCCH, etc.
[0174] (3) The indication of time resources may be necessary in the following cases.
- Silence the CSI-RS transmission for different beams in relation to the beam used for data transmission (predominantly TX beam)
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- Silence the SRS transmission for different beams in relation to the assumed beam for data transmission (predominantly RX beam)
- Silence direct compatibility features
- Silence resources protected by inter-cell interference coordination (ICIC) (for example, LTE PDCCH, LTE CRS, protected region)
-Schedule a multi-partition schedule or multi-mini-partition schedule (4) In terms of time resource, the duration or size of the resource can be configured (for example, the maximum partition size) (5) The domain resource of time can be grouped into a mini-partition or a set of OFDM symbols and resource allocation can be applied by each group. In terms of resource allocation, a contiguous or group based time resource approach can be considered. A joint indication between frequency and time can also be considered.
[0175] Similar mechanisms can also be applied to a common search space or group-specific search space and the configuration can be carried out using a common signal such as SIB / MIB and / or group broadcast.
[0176] Since an indication of time and frequency domains can lead to considerable overhead, it can be indicated whether a time and / or frequency resource allocation is used. In addition, if the time / frequency resource granularity is performed by adopting two-level or multiple-level DCIs it can also be indicated. The first level DCI, which can be shared between multiple UEs or performed by a common signal mentioned in the present invention, can indicate the granularity of resources and / or type of resource allocation. Depending on the indication, the size of the resource allocation and / or interpretation may be different. For UEs that may not be able to successfully decode a common signal in at least some cases, a standard setting can be used.
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71/89 [0177] To indicate unavailable time / frequency resources, in addition to the common signal for indicating the type of resource allocation / granularity, invalid time / frequency resource can also be indicated using the common signal. Depending on the signaling, the hypothesis of UE on a different channel may be different. The following are examples.
- Common signal can indicate time / frequency resources available for all channels. For example, DL / UL partition type or DL / UL size can be commonly indicated.
- Common signal can indicate time / frequency resources available for all channels except for data channels. For example, the available resources can be scheduled through dynamic scheduling (specifically UE), and a common signal can indicate the resource available to other channels such as CSI-RS, PUCCH, SRS, etc. More generally, the signal can be applied to channels where the resource may not be dynamically indicated (for example, periodically configured channels, or channels with semi-static configuration for the resources). For other channels, a dynamic indication can be used through scheduling.
- Common signal can indicate minimum available time / frequency resources and additional resources can be indicated to the EU through dynamic scheduling. When this approach is used, unless an additional referral is received, all channels can assume that the resource indicated by a common signal is the only resource available. To handle the missing case, a standard minimum available time / frequency resource can be pre-configured.
- Common signal can indicate a maximum available time / frequency resource and an additional restriction can be indicated to the EU through dynamic scheduling. When this approach is used, unless an additional referral is received, all channels can assume that the resource indicated by a common signal is the available resource. To handle the missing case, you can pre-configure a
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72/89 standard available time / frequency feature.
[0178] Since the common sign can be indicated by different UEs grouping based on different reasons (for example, numerology used, usage scenario, type of service, etc.), a UE may need to search for more than one sign common. In terms of actual configuration / indication, instead of a direct time / frequency resource configuration, one can consider an index of pre-configured patterns. An example of pre-configured patterns can be as follows.
- [00110110011011]: First, second, 4- symbols are not available for every 7 OFDM symbols.
- [001111111111111]: first and second symbols are not available (for example, single frequency broadcasting and multicast network (MBSFN)).
- [011111111111111]: only the first symbol is not available.
- [111111111100000]: Size of the downlink pilot time partition region (DwPTS) is equal to 9 symbols from OFDM to DL. Depending on the size of the GP, the size of the uplink pilot time partition (UpPTS) can be 1,2, 3, 4 (GP size becomes 4, 3, 2, 1).
6. Null / punctured resource indication [0179] When eMBB / URLLC are multiplexed or some resources (for example, invalid OFDM symbols) are not available, the mechanism for indicating a null resource needs to be considered.
(1) Indication mechanism [0180] Common signal (CSS or EU group search space) that contains information in indication signal positions can be indicated, and an actual indication signal in the indicated position can also be indicated. The common signal can indicate the possible positions where the indication signal can actually be transmitted. In the indicated position, a real indication signal can be transmitted. For example, to support URLLC and eMBB data, possibly a partition type
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73/89 DL centric and symmetric DL-UL partition type can coexist. If the network has any UL URLLC data, the network can switch the partition type from DL centric partition type to symmetric DL-UL partition. In this case, the indicated position can be an intermediate OFDM symbol or OFPM starting symbol of DL-UL symmetric partition type UpPTS. If the indication sign indicates the DL symbol, the UE can assume that the DL centric partition type is used.
[0181] Alternatively, mini-partition positions can be indicated, and each mini-partition can indicate DL or UL that are maintained until the next indication position. To change the partition type, the indicated positions can include (1) the first UPPTS OFDM symbol in UL centric partition type, (2) the first UPPTS OFDM symbol in DL-UL symmetric partition type, and ( 3) UpPTS 'first OFDM symbol in DL heavier partition type. Symmetric partition type of DL-UL can refer, for example, DDDDDDDGUUUUUU or DDDDDDGUUUUUUU or DDDGUUU. UL centric partition type can refer to, for example, DGUUUUU or DGUUUUUUUUUUUU. Heavier partition type of DL can refer, for example, to DDDDGUU or DDDDDDDDDGUUUU (ie, portion of DL is greater than portion of UL). The indication can be implicit or explicit. When an implicit indication is used, the capture gap position where UEs or the network can perform a capture for some other high priority data transmission in progress can be used. High priority transmission may include the following.
-Transmission of LTE if LTE / NR coexist in LTE spectrum -Transmission of DL in resources destined for DL
- Transmission of UL in resources destined for UL
- URLLC traffic by eMBB
- Any high priority transmission over the network [0182] The indication may include time and frequency information where the
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74/89 indication or capture must be transmitted or occurred. A common signal can indicate an index from a set of pre-configured or configured patterns of time / frequency resources. In addition to the indicated position, the type of indication or indication reason can also be configured. For example, type or reason of indication can be as follows.
- Reticulated interference mitigation (capture may be required): Valid / invalid resource for UL without DL resource intended or valid / invalid for DL resource in UL intended resource
- URLLC punctures eMBB (indication can be signaled) (2) UE behavior in the indicated resource
- The UE can detect an indication signal. The indication signal can be multiplexed with DL data. When the UE detects an indication signal, depending on the transmission data reception / progress priority, the UE can do different things. For example, eMBB UEs can assume that the referral means invalid appeal or null appeal where the referral is applied, and can treat the appeal as punctured or postponed. The indication can also include validity and a UE can assume that the indicated resources are valid only if the signal / indication is detected.
- the UE can perform a capture. For example, when an UE schedules UL, at the indicated positions, the UE can pick up whether there is a DL transmission in progress or not. If a collection does not show a DL transmission, the UE can continue the UL transmission. When capturing, the UE can also capture a UL URLLC transmission, and then it can stop the UL transmission.
- UE behavior can be configured over the network. Depending on the type of UE and usage scenarios, etc., the behavior can be configured by the network. For example, the UE can take on an invalid resource or take on a valid resource. Or, the UE can punch or correspond by fee or make a capture or target
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75/89 pickup, for example, neighbor cell or other UEs or URLLC traffic, etc.
[0183] (3) Examples
- For mitigation of reticulated interference, in an intended DL resource, indication in invalid resource can be indicated for UL resource. The indication sign can indicate valid or invalid. A UE transmitting on this resource can capture the configured / indicated resource or detect the indication signal, and if the capture results show IDLE or indication shows indication resource, UL transmission can be continued. Otherwise, the UL transmission can be abandoned, punctured, matched for a fee in the resources affected by the indicated / capture position. The affected resource can be defined between two cue points (that is, from the current cue point to the next cue point).
- For mitigation of reticulated interference, in a UL resource destined, indication in invalid resource can be indicated for DL resource. Unlike the previous description, if a capture is used, a capture can be performed by the network instead of UEs. When the capture fails, the network may stop transmission. To avoid UE buffer corruption, an additional indication can also be considered and an actual capture can take place before the indication. To support this, a null resource for capturing the network and indicated position can be separated or jointly configured / indicated by common signal. Or, a UE can blindly search for a signal / RS after the indication point to detect whether the transmission continues or not.
- Punching of eMBB DL: if a puncture is possible due to URLLC DL or URLLC UL in transmission of eMBB DL, the indication can indicate whether the puncture has occurred or not. In the case of URLLC ULe eMBB DL, an indication may not be possible to be transmitted. Therefore, UEs can assume that the resource is stolen if an indication is not detected.
- eMBB UL punching: similar to DL, a UL punching
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76/89 can also occur to transmit URLLC DL or URLLCLC UL. In this case, an explicit indication on an invalid resource indication can be used and UEs can assume that the resources are invalid only if the indication signs are detected. Otherwise, the UE can continue the UL transmission. In this case, it is more efficient to transmit UL through a mini-partition design where a gap or indication position can be placed between mini-partitions.
[0184] In terms of punching indication, since it is difficult to indicate before transmission, a post-transmission indication can be considered, and a common signal can be transmitted at the end of the subframe / partition or at the beginning of the next partition. When the common signal is used to indicate puncture, a common channel can be present only when the puncture has occurred. Since the next partition / subframe may not have a control region, the first available partition / subframe with a control region can transmit an indication. Since different UEs can have different information about partition / subframe available, the gap between partition / subframe punctured to the indicated subframe can be fixed (for example, 1). When a specific punching EU indication is used, an allocation of resources for retransmission may include a punching indication. If this signaling is adopted, it is not necessary that all UEs need to detect a common signal. Only UEs scheduled with data can fetch the signal.
[0185] The common signal can also be used to stop UL transmission If a UE detects a common signal, the UE can interrupt any UL transmission on the few current or nearby partitions. Or, simply a UE can cancel the entire UL scheduled by dynamic DCI. If a UE is transmitting a multi-partition UL transmission, the UE can abandon the rest of the UL transmission once the common signal is detected. If this signaling is used, the signaling transmission can be aperiodic and the signaling can be transmitted
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77/89 only if a puncture is performed. This can be associated with the type of partition and the punching can be indicated with the reserved resources. In the case of puncture, the type of indication can indicate regression or for previous partition / subframe. If punching indication using a common signal is used, and ACK / NACK based on code block group (CB) is used, ACK / NACK for punching CBs and CBs with low signal to interference to noise ratio (SINR) (or low signal quality) can be separately indicated so that redundancy versions (RVs) can be constructed differently. The common signal for a puncture case can also be used for transmission of intercellular URLLC and a UE in one cell may overhear a common signal from another cell that may indicate a puncture indication. If this punctured resource can have a higher level of interference and require an emptying of the received resource due to a higher level of URLLC interference, it can also be indicated to the network for retrieval (or retransmission of system information bits).
7. Coexistence of NR / LTE [0186] When NR is deployed in an LTE spectrum whether co-channel or in an adjacent carrier, to maximize resource utilization, a null resource can be dynamically indicated for NR. A null resource can include resources required for LTE operation. For example, the number of OFDM symbols used for legacy PDCCH, whether the subframe is used for LTE transmission or not, or type of subframe, etc., can be indicated. Particularly when LTE and NR cells are colocalized or connected via ideal backhaul, the NR cell can know known dynamic scheduling information. Otherwise, NR cell can listen in the LTE control region (at least partially, for example, read physical control format indicator channel (PCFICH), SIB, etc.) by aerial signaling between LTE and NR. Based on the information, cell NR can
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78/89 determine the starting position of the partition or control region. The starting position or set of valid or invalid resources can be indicated in the dedicated / reserved resource.
[0187] An example of a dedicated / reserved resource for common signal transmission is to use LTE band guard band. For example, if an NR band has a smaller guard band through filtering, the guard band can be used for some signal transmission. Alternatively, the time / frequency region for common signal transmission can be reserved for NR.
[0188] Figure 10 shows an example of using a guard band for common signal according to an embodiment of the present invention. Referring to Figure 10, an NR transmission occurs with a 30 kHz subcarrier spacing and its transmission starts from the 4- OFDM symbol.
[0189] The common sign can indicate at least one among a starting position from which NR begins transmission (for example, the legacy PDCCH region number), a set of symbols usable for NR (for example, symbols OFDM voids or OFDM symbols available for NR transmission), or an available resource pattern. The possible patterns can be as follows.
-1 first OFDM symbol used for legacy PDCCH + 2/4 normal CRS TX port subframe (2 or 4 ports can be configured / indicated by top layer)
- 2 first OFDM symbol used for legacy PDCCH + 2/4 normal CRS TX port subframe (2 or 4 ports can be configured / indicated by top layer)
- 3 first OFDM symbol used for legacy PDCCH + 2/4 normal CRS TX port subframe (2 or 4 ports can be configured / indicated by top layer)
Petition 870190048697, of 05/24/2019, p. 95/127
79/89
-1 first OFDM symbol used for legacy PDCCH + 2/4 subframe CRS TX MBSFN port (2 or 4 ports can be configured / indicated by top layer)
- 2 first OFDM symbol used for legacy PDCCH + 2/4 subframe CRS TX MBSFN port (2 or 4 ports can be configured / indicated by upper layer) [0190] When a standard is configured, the UE can assume that the NR portion can start at the available resource. In terms of handling unavailable resources, rate compatibility or puncturing can be considered. Rate compatibility means that control, RS or data are pushed to the next OFDM symbol if the current symbol is not available or matched by rate. Rate compatibility can only be applied to the control channel and associated RS. The data reference signal and demodulation (DM-RS) or PDSCH can be punctured in unavailable resources. It may be generally desirable to fix a DM-RS data position and also to control the OFDM symbols that are generally available to NR if the partition is available to NR. To minimize bad behavior, standard behavior can be as follows.
- 3 OFDM symbols can be used for legacy PDCCH (assuming 1.4 MHz system bandwidth is not supported)
- CRS (if present) can puncture the NR transmission [0191] If this is assumed, the control or partition region can start at the 4 OFDM symbol. When a 30 kHz subcarrier spacing is used, the partition size of each partition will be 11 OFDM symbols (in total 22 OFDM symbols in 1 ms, excluding 3 15 kHz OFDM symbols). Or, the first partition can be fee-matched or punctured only.
[0192] Figure 11 shows an example of patterns for LTE coexistence and
Petition 870190048697, of 05/24/2019, p. 96/127
80/89
NR according to an embodiment of the present invention. Figure 11- (a) shows a case of equal partition size based on a semi-static configuration. Figure 11 - (b) shows a case of equal partition size assuming all available resources. In this case, if a common signal indicates that more resources are available, the resource available for common / dynamic signaling can be used for data portion. Even in this case, the control region can preferably be fixed, and the remaining portions can be used for data. To improve reliability, DCI can indicate a data departure OFDM symbol before the control region. In Figure 11, DCI can indicate a data transmission in -4 OFDM symbols. DM-RS data positions can preferably be fixed based on the semi-static configuration or fallback configuration. When sets of available / unavailable resources are configured, a signal can contain information by multi-partitions rather than on a per-partition basis. The resource can include both time and frequency.
[0193] This can generally be applied to cases where NR can exist autonomously in a frequency spectrum as well, if loss of generality. The control region can be fixed as the first OFDM symbol on a partition.
8. eMBB / URLLC multiplexing [0194] A common signal can be used for eMBB / URLLC multiplexing and to assist information for URLLC transmission. The following describes examples of possible referral information for multiplexing / scheduling eMBB / URLLC.
- Priority partition for URLLC: eMBB UEs need to check the indication signal when puncturing. This may also be applicable to the type of UL partition as well.
- Priority partition for eMBB: URLLC data cannot punch the
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81/89 data transmitted on the partition
- Resource reserved for eMBB: Protected resources can be indicated using the common sign
- Channels / signals reserved for eMBB: Channels / signals protected in the partition that will not be punctured by URLLC can be indicated using the common signal.
- If the partition can be used for contention-based and / or concession-free transmission: If the indication is present, the partition can be usable for contention-based or concession-free transmission. Otherwise, the partition cannot be used for transmission based and contention and / or concession free. With this mechanism, to dynamically adjust a containment feature, a very large grouping for containment feature can be allocated, and then the feature can be enabled or disabled on a per-partition basis or on a multi-partition basis.
- If a partition type is DL or DL centric, a containment feature may not be available. If a partition type is UL or UL centric, the containment feature may be available.
- Multiple resource sets can be configured and the activation or deactivation of multiple resource sets can be indicated through a possibly dynamic common signaling.
9. Assistance in reducing EU blind detection [0195] A usual case for using a common signal is to indicate or assist in reducing EU blind control detection. Since a long-term reduction of blind detection can be accomplished by semi-static signaling or dynamic bandwidth adaptation, general blind detection reduction can be accomplished on a per-partition basis. That is, a reduction in blind detection can occur in the partition or in the next partition where a common signal was transmitted / received. For better quality, the common signal
Petition 870190048697, of 05/24/2019, p. 98/127
82/89 for blind detection reduction assistance can be transmitted on the previous partition. The common signal transmission point or gap between the common signal and a partition where the common signal is applied can be configured (the gap can be 0, 1 ... etc.). Control region size information can be entered with CRC in the common channel or scrambling can be used differently depending on the size of the control region. In other words, the size of the control region in the time domain can be transmitted opportunistically if the common signal is transmitted, and the information can be incorporated as CRC or scrambling, to minimize the payload size.
[0196] If a common signal is for multiple carriers, the size of the control region is only for the carrier where the signal is transmitted. In other words, other carriers without a common signal transmission may not dynamically transmit the size of the control region. In addition, the economy of blind detections with common signal can be configured or applied only when a UE expects CCEs to be mapped in a first frequency mode. In other words, PDCCHs are preferably confined to OFDM symbols. Alternatively, if the size of the control region is fixed and some resources are fixed regardless of the common signal to indicate a size of the control region, the mapping for the first time can be used on the fixed resource, and the first frequency mapping can be used flexible resource. If a scramble or CRC is used to deliver a control region size, if a common control is not configured or transmitted, CRC or scrambling can be performed on some other cell-common RS transmissions like CSI-RS, tracking RS, Measuring RS, etc. If a common signal is transmitted from the previous partition, the reduction of blind detection in terms of numbers, percentages, etc., can also be considered. Another approach or reduction in blind detection serves to indicate a set of
Petition 870190048697, of 05/24/2019, p. 99/127
83/89 UE groups that are scheduled on the current or next partition instead of the size of the control region. This can be accomplished through a map of M bits, where M can be the number of UE groups. A UE based on their RNTI or UE-ID can determine their group, and does not blindly decode if the group does not have an appointment indication.
[0197] For another possible reduction in blind detection, at least one cross subframe / partition schedule can be used, the start of the data may not be less than the end of the control region. For example, if a UE is scheduled with data starting at the 3 ^Q OFDM symbol at n + 4, a UE assumes that the size of the control region is 2 n / 4 partition / subframe symbols, regardless of the settings. However, control feature sets may not cover the entire UE bandwidth where the UE monitors control and / or data. In this case, the beginning of PDSCH can be indicated as earlier than the end of the control region. In this case, data can be matched by rate in the configured control feature sets. If a UE can assume that the size of the control region is smaller than the start of data transmission or not for cross-subframe / partition scheduling, it can be configured / informed by the upper layer. This may not be true for the same partition / subframe schedule, as the size of the USS control region may be larger than the start of data transmission. If there is an indication whether an UE can take over TDM between the control region and the data region through explicit or implicit indication, this can also be applied to the same partition / subframe schedule.
[0198] A useful case of reducing blind detection by indicating the size of the control region is the case that the scheduling of a common signal cross carrier is achieved by a carrier with a larger sub carrier spacing to another carrier with a spacing smaller subcarrier. In that case, the
Petition 870190048697, of 05/24/2019, p. 100/127
84/89 information can be applied to the same partition where cross-carrier scheduling is applied, or to the next partition after cross-carrier scheduling is achieved. If this case is supported, the size of the control region for a carrier can be included in the common signal content, and the common signal can be transmitted through cross carrier scheduling. The size of the control region can also be indicated as part of the partition type indication, and no additional information may be required if a UL or UL centric or reserved partition type is indicated, since the control region in these cases is clear. An additional control region size can be indicated only if a DL or DL centric partition is indicated where the size of the control region can be additionally transmitted. A joint transmission of partition type and size of control region can also be considered according to the following examples.
[0199] - [1 DL-control symbol, centric to DL, 1 symbol
UL-control], symbol DL-control, centric to DL, 2 symbol UL-control] [0200] - [2 symbol DL-control, centric to DL, 1 symbol
UL-control], [2 symbol DL-control, centric to DL, 2 symbol UL-control] [0201] - [3 symbol DL-control, centric to DL, 1 symbol
UL-control], [3 symbol DL-control, centric to DL, 2 symbol UL-control] [0202] - [1 symbol DL-control, centric to UL, 1 symbol
UL-control], DL-control symbol, UL-centric, 2 UL-control symbol] [0203] - [2 DL-control symbol, UL-centric, 1 symbol
UL-control], [2 DL-control symbol, UL-centric, 2 UL-control symbol] [0204] - [3 DL-control symbol, UL-centric, 1 symbol
UL-control], [3 DL-control symbol, UL-centric, 2 UL-control symbol] [0205] 0 other standards can also be considered. The previous standards can potentially be subsets of possible configurations. The type
Petition 870190048697, of 05/24/2019, p. 101/127
85/89 multi-partition partition excluding fixed or reserved DL or UL partitions or fixed DL / UL partitions, if a common signal is periodically transmitted, it can be transmitted.
[0206] If the size of the control region is indicated by a common sign, it is necessary to clarify whether the signaling is applied to all EU control regions or some UEs only. UEs that receive the common RNTI common to the corresponding group can assume that the same size can be applied to all configured control feature sets. If a different size is applied or configured to each control feature set, a common sign may indicate an unmapped control region in OFDM symbols, rather than the size of the control region. For example, if the size of the control region is set to 3 OFDM symbols semi-statically, and a common sign indicates that two symbols are not mapped to a control region, a UE can assume that 1 OFDM symbol is used for a region of control. Through this, the same reduction can be applied to all configured resource sets that can lead to different time domain control resource set sizes. Alternatively, an RNTI common to a different group can be configured for each or a subset of resource sets as well, and a different indication can be expected.
[0207] In a millimeter wave (mmWave) environment, it is challenging to transmit a common signal. If a common signal is adopted, it can be indicated whether there will be a schedule in the same beam direction on the next partition or not. For example, if the network has transmitted a beam 1,3, 5 in partition n, for each beam 1,3, and 5, the network can indicate whether there will be a control schedule to beam 1, 3 and 5 or not, respectively . If a schedule is not indicated for the next partition, a UE can omit decoding on the next partition if the UE is configured with the beams. Similarly, to minimize blind decoding of resources
Petition 870190048697, of 05/24/2019, p. 102/127
86/89 used for different beams in relation to beams configured from an EU perspective, a set of candidate OFDM symbols can be determined based on a function or a rule. For example, if a UE supports a total of N beams, and a maximum of K beams can be transmitted per partition, and a UE expects about P times of monitoring occasions during N / K partitions, a UE can monitor the region from control on N * P / K * i + UE-ID or RNTI% N * P / K partitions, where i = 0,1,2 ... P-1. The idea is to distribute monitoring occasions evenly to UEs. A different function can be considered.
[0208] Another approach is to map CCEs across multiple partitions. The number of partitions can be configured by the dynamic network or semi-statically and a UE can access different OFDM symbols to search for candidates based on the hash function. In this case, to allow multiplexing of UEs with the same beam to the same OFDM symbols, the same hash function can be used between UEs sharing the same beam ID. In other words, the hash function can be based on the beam ID or the associated CSI-RS resource index where a UE expects to receive the data. To minimize collision between UEs with the same beam ID, a secondary hashing can be used after hashing based on the beam ID. Alternatively, the hash function based on the beam ID can be performed at the OFDM symbol level, and if the network sets up K control symbols on each partition by M partitions, a total of K * M symbols may be available for hashing. The number of candidate symbols, for example, P, can be selected based on the hash function and the configured offset. Or, P OFDM symbols can be randomly selected based on hash / randomization functions. A secondary hashing can be performed on the selected symbols.
[0209] Figure 12 shows a method for handling priority of a common control signal by a UE according to an embodiment of the present invention. The present invention described above can be applied to this embodiment.
Petition 870190048697, of 05/24/2019, p. 103/127
87/89 [0210] In step S100, the UE receives the common control signal from a network through a GCCC. The common control signal is for all UEs or a group of UEs in a cell. In step S110, the UE handles the priority of the common control signal compared to other signals.
[0211] The priority of the common control signal can be higher than a configured configuration semistatic or specifically the UE. The priority of the common control signal may be less than a setting configured commonly for the cell or commonly for the group. The priority of the common control signal may be less than a setting specifically configured for dynamic UE.
[0212] The priority of the common control signal can be higher than a semi-static setting when the common control signal indicates a flexible feature. The flexible feature can be determined by a semi-static DL / UL configuration. The flexible resource can be determined by a resource or type of RS of the semi-static configuration. The flexible feature can be determined by a configuration method.
[0213] The priority of the common control signal may be lower than a semi-static setting when the common control signal indicates a fixed DL resource or UL resource.
[0214] The common control signal can be received in a subset of candidates or in a first OFDM symbol of a control region or in a frequency region among the control resource sets.
[0215] The common control signal can indicate at least whether a type of a current subframe is centric to UL or centric to DL, whether a type of close subframe is centric to UL or centric to DL, whether the current subframe is scheduled with Single-level or multi-level DCI, if the next subframe is scheduled with single-level or multi-level DCI, a common or group-specific shared resource pool size, or a real DL resource indication, UL resource and / or
Petition 870190048697, of 05/24/2019, p. 104/127
88/89 reserved feature.
[0216] The common control signal can be received through a carrier scheduling or a cross carrier scheduling.
[0217] An exact length of a long PUCCH format can be indicated from the network. The UE can receive DL data from the network, and transmit a UL control signal to the network via the long PUCCH format.
[0218] Figure 13 shows a wireless communication system for implementing a modality of the present invention.
[0219] A network node 800 includes a processor 810, a memory 820 and a transceiver 830. The processor 810 can be configured to implement the proposed functions, procedures and / or methods described in that description. The radio interface protocol layers can be implemented in the 810 processor. The 820 memory is operationally coupled to the 810 processor and stores a variety of information to operate the 810 processor. The 830 transceiver is operationally coupled to the 810 processor, and transmits and / or receives a radio signal.
[0220] An UE 900 includes a 910 processor, a 920 memory and a 930 transceiver. The 910 processor can be configured to implement proposed functions, procedures and / or methods described in that description. The radio interface protocol layers can be implemented in the 910 processor. The 920 memory is operationally coupled to the 910 processor and stores a variety of information to operate the 910 processor. The 930 transceiver is operationally coupled to the 910 processor, and transmits and / or receives a radio signal.
[0221] Processors 810, 910 may include an application specific integrated circuit (ASIC), another chipset, logic circuit and / or data processing device. Memories 820, 920 can include memory only for
Petition 870190048697, of 05/24/2019, p. 105/127
89/89 read (ROM), random access memory (RAM), flash memory, memory card, storage media and / or other storage device. Transceivers 830, 930 may include a baseband circuitry for processing radio frequency signals. When the modalities are implemented in software, the techniques described in this document can be implemented with modules (for example, procedures, functions, and so on) that perform the functions described in this document. The modules can be stored in memories 820, 920 and executed by processors 810, 910. Memories 820, 920 can be implemented in processors 810, 910 or external to processors 810, 910, in which case those can be communicatively coupled to processors 810 .910 by various means as known in the art.
[0222] In view of the exemplifying systems described in this document, the methodologies that can be implemented according to the revealed material have been described with reference to several flowcharts. Although for the sake of simplicity, the methodologies are shown and described as a series of steps or blocks, it must be understood and evaluated that the claimed matter is not limited by the order of the steps or blocks, since some steps may occur in different orders or simultaneously with other steps from what is portrayed and described in this document. Furthermore, an individual skilled in the art understands that the steps illustrated in the flowchart are not exclusive and other steps can be included or one or more steps in the example flowchart can be excluded without affecting the scope of the present disclosure.

权利要求:
Claims (15)
[1]
1. Method performed by a user equipment (UE) in a wireless communication system, CHARACTERIZED by the fact that the method comprises:
receive a common group control signal from a network through a common group control channel (GCCC), where the common group control signal is scheduled to a group of UEs with a temporary radio network identity (RNTI) specific to the control channel common to the group;
receiving a signal different from the common group control signal from the network; and dealing with a group-common control signal priority compared to a signal priority.
[2]
2. Method, according to claim 1, CHARACTERIZED by the fact that the priority of the control signal common to the group is higher than a priority of the signal when the signal is a configuration configured specifically to the semistatic UE.
[3]
3. Method, according to claim 2, CHARACTERIZED by the fact that the configuration specifically configured for the semistatic UE is a configuration of a transmission of the reference sound signal (SRS).
[4]
4. Method, according to claim 2, CHARACTERIZED by the fact that the configuration configured specifically for the semistatic UE is a configuration of a reference transmission signal of channel state information (CSI-RS).
[5]
5. Method, according to claim 1, CHARACTERIZED by the fact that the priority of the control signal common to the group is lower than a signal priority when the signal is a configuration configured commonly to the semistatic cell.
[6]
6. Method, according to claim 5, CHARACTERIZED by the fact that
Petition 870190048697, of 05/24/2019, p. 125/127
2/3 that the configuration commonly configured for the semistatic cell is a configuration of at least one system information block (SIB) or a physical broadcasting channel (PBCH).
[7]
7. Method, according to claim 1, CHARACTERIZED by the fact that the priority of the control signal common to group is less than a priority of the signal when the signal is a configuration specifically indicated the dynamic UE through scheduling.
[8]
8. Method, according to claim 1, CHARACTERIZED by the fact that the control signal common to the group indicates a first type of resource, and in which the sign indicates a second type of resource different from the first type of resource.
[9]
9. Method, according to claim 8, CHARACTERIZED by the fact that the control signal common to the group replaces the signal when the second type of resource indicates a flexible resource.
[10]
10. Method, according to claim 8, CHARACTERIZED by the fact that the control signal common to the group does not replace the signal when the second type of resource indicates a fixed downlink (DL) resource or an uplink resource ( UL) fixed.
[11]
11. Method, according to claim 1, CHARACTERIZED by the fact that the control signal common to the group is received in a subset of candidates or in a first orthogonal frequency division multiplexing (OFDM) symbol of a control region or in a frequency region among sets of control resources.
[12]
12. Method, according to claim 1, CHARACTERIZED by the fact that the control signal common to the group indicates at least one among whether a type of a current subframe is centric to UL or centric to DL, if a type of next subset is UL centric or DL centric, if the current subframe is scheduled with information
Petition 870190048697, of 05/24/2019, p. 126/127
3/3 single-level downlink (DCI) or multi-level DCI control, if the next subframe is scheduled with single-level or multi-level DCI, a common or group-specific shared control resource set size, or a indication of actual DL resource, UL resource and / or reserved resource.
[13]
13. Method, according to claim 1, CHARACTERIZED by the fact that the control signal common to the group is received through a self-carrier scheduling or a cross-carrier scheduling.
[14]
14. Method, according to claim 1, CHARACTERIZED by the fact that an exact length of a physical uplink control channel format (PUCCH) is indicated from the network.
[15]
15. User equipment (UE) in a wireless communication system, CHARACTERIZED by the fact that the UE comprises:
a memory;
a transceiver; and a processor, operationally coupled to the memory and the transceiver, which:
controls the transceiver to receive a common group control signal from a network through a common group control channel (GCCC), where the common group control signal is scheduled to a group of UEs with a temporary identity radio network (RNTI) specific to the common group control channel, controls the transceiver to receive a signal other than the common group control signal from the network, and handles a common group control signal priority compared to a signal priority.

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法律状态:
2021-03-09| B11A| Dismissal acc. art.33 of ipl - examination not requested within 36 months of filing|

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2021-05-25| B11Y| Definitive dismissal - extension of time limit for request of examination expired [chapter 11.1.1 patent gazette]|

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2021-10-05| B350| Update of information on the portal [chapter 15.35 patent gazette]|

优先权:

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申请号 | 申请日 | 专利标题

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US201662426326P| true| 2016-11-25|2016-11-25|

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US201662434388P| true| 2016-12-14|2016-12-14|

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US201762452392P| true| 2017-01-31|2017-01-31|

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US201762454616P| true| 2017-02-03|2017-02-03|

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US201762473451P| true| 2017-03-19|2017-03-19|

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US201762476620P| true| 2017-03-24|2017-03-24|

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US201762565068P| true| 2017-09-28|2017-09-28|

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PCT/KR2017/013616|WO2018097680A1|2016-11-25|2017-11-27|Method and apparatus for designing broadcast channel for nr in wireless communication system|

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