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    • 专利摘要:
    IMPROVED ALLOCATION OF UP-LINK CONTROL PHYSICAL CHANNEL FORMAT FEATURE FOR TIME DIVISION DUPLEX MODE. In one aspect of the invention, exemplary embodiments provide a method that includes, when in a time division duplex mode of operation with a user equipment, allocating uplink physical control channel resources by reserving channel resources physical uplink control with the granularity of a negative acknowledgment/acknowledgment packet (Ack/Nack), and sending an indication of the allocated resources of the uplink physical control channel from a network access node to the user equipment .
    公开号:BR112012032414B1
    申请号:R112012032414-4
    申请日:2010-06-18
    公开日:2021-04-20
    发明作者:Peng Chen；Chunyan Gao；Esa Tiirola
    申请人:Nokia Solutions And Networks Oy；
    IPC主号:
    专利说明:

    TECHNICAL FIELD:
    Exemplary and non-limiting embodiments of the present invention generally relate to wireless communication systems, methods, devices and computer programs and more specifically relate to signaling related to the allocation of resources between a network access node and user equipment, as well as uplink recognition reporting techniques. BACKGROUND OF THE INVENTION:
    This section is intended to provide a background or context for the invention that is reported in the claims. The present description may include concepts that can be implemented, but are not necessarily those that were previously conceived, implemented or described. Therefore, unless otherwise indicated herein, what is described in this section is not prior art to the description and claims of this application and is not accepted as being prior art by inclusion in this section.
    The following abbreviations can be found in the specification and/or the drawing data are defined as follows: 3GPP third generation partnership project - third generation partnership project ACK acknowledgment - acknowledge BS base station - base station BW bandwidth - bandwidth CA carrier aggregation carrier aggregation CC carrier component component carrier CCE channel control element - control channel element DAI downlink assignment index - downlink assignment index DL downlink - downlink (eNB towards UE) eNB E-UTRAN node B (evolved node B) EPC core evolved packet - evolved packet core E-UTRAN UTRAN evolved - evolyed UTRAN (LTE) FDMA frequency division multiple access - frequency division multiple access HSPA high speed packet access - high speed packet access IMTA international mobile telecommunications association - mobile telecommunications association : t '' r ITU-R international telecommunications union-radiocommunication sector - international telecommunication union- radiocommunication LTE sector long term evolution of UTRÀN - long term evolution of 5 LTE-A UTRAN (E-UTRAN) Advanced LTE MAC medium access control - medium access control (layer 2, L2) MM/MME mobility management / mobility management entity - mob ility management/mobility management entity 10 NACK not acknowledge (negative) - not (negative) acknowledge NodeB base station - base station OFDMA orthogonal frequency division multiple access - orthogonal frequency division multiple access O&M operations and maintenance 15 PDCCH physical control channel downlink - physical downlink control channel PDCP packet data convergence protocol - packet data convergence protocol physical PHY (layer 1, L1) 20 PUCCH physical uplink control channel - physical uplink control channel PUSCH physical uplink sharing channel - physical uplink shared channel QPSK quadrature phase shift modulation - quadrature 25 phase shift keying Release release - RLC release radio link control - radio link control RRC radio resource control - radio resource control RRM radio resource management - radio resource management 30 SGW server port - serving gateway SC-FDMA single carrier, frequency division multiple access - single carrier, frequency division multiple access TDD duplex duplex - time division duplex UE user equipment - user equipment, such as a UL mobile station, mobile node or mobile terminal uplink - uplink (UE towards eNB) UPE user plane entity - user plane entity UTRAN universal terrestrial radio access network - universal terrestrial radio access network
    A modern communication system is known as an evolved UTRAN (E-UTRAN, also referred to as UTRAN-LTE or as E-UTRA). In this system, the DL access technique is OFDMA, and the UL access technique is SC-FDMA.
    A specification of interest is 3GPP TS 36,300, V8.11.0 (2009-12), "3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Access Network (EUTRAN) ; Overall description; Stage 2 (Release 8)," incorporated herein by reference in its entirety. This system may be referred to for convenience as LTE Rel-8. In general, the set of specifications generally denoted as 3GPP TS 36.xyz (eg 36.211, 36.311, 36,312, etc) can be seen to describe the LTE system release 8. More recently, the release of versions 9 at least some of these specifications have been published, including 3GPP TS 36.300, V9.3.0 (2010-03). Figure 1A reproduces Figure 4.1 of the 3GPP TS 36.300 V8.11.0, and shows the general architecture of the EUTRAN system (Rel-8). Reference can also be made to Figure 1B. The E-UTRAN system includes eNBs, providing the E-UTRAN user plane (PDCP / RLC / MAC / PHY) and control plane protocol terminations (RRC) for the UEs. The eNBs are interconnected with each other via an X2 interface. The eNBs are also linked via an S1 interface to an EPC, more specifically to an MME, via an S1 interface and MME to the S-GW via an S1 interface (MME / S-GW 4). The S1 interface supports a many-to-many relationship between MMES / S-GWS / UPES and eNBs.
    The eNB hosts the following functions: - functions for RRM: RRC, Radio Admission Control, Radio Link Mobility Control, Dynamic Resource Allocation for UEs, both in UL and DL (scheduling); - IP header compression and user data stream encryption; - selection of an MME in the EU annex; - data routing from User Plan to EPC (MME / S-GW); - programming and transmission of paging messages (originated from the MME); -scheduling and transmission of broadcast information (sourced from MME or O&M); and a measurement and configuration of mobility measurement and scheduling reports.
    Of particular interest in this context are the additional releases of 3GPP LTE (eg LTE Rel-10) aimed at future IMTA systems, herein referred to for convenience simply as LTE-Advanced (LTE-A). Reference in this regard can be made to 3GPP TR 36.913, V9.0.0 (2009-12), Third Generation Partnership Project; Radio Group Access Network Technical Specification; Evolved Universal Terrestrial Radio Access (E-UTRA) (LTE-Advanced) (release 9). Reference can also be made to 3GPP TR 36.912 V9.3.0 (2010-06) Third Generation Partnership Project Technical Report; Radio Group Access Network Technical Specification, Feasibility Study for Further Advances to E-UTRA (LTE-Advanced) (Release 9).
    The goal of LTE-A is to deliver significantly improved services through higher data rates and lower latency at a reduced cost. LTE-A is aimed at extending and optimizing LTE 3GPP Rel-8 radio access technologies to provide higher data rates at a lower cost. LTE-A will be an optimized radio system meeting the ITU-R requirements for IMT-Advanced while maintaining compatibility with the previous LTE Rel-8 version.
    As specified in 3GPP TR 36.913, LTE-A must operate in spectrum allocation of different dimensions, including spectrum allocations wider than LTE Rel-8 (eg up to 100MHz) to achieve the peak data rate 100 Mbit/s for high mobility and 1 Gbit/s for low mobility. It was agreed that carrier aggregation should be considered for LTE-A in order to support bandwidths greater than 20 MHz. Carrier aggregation, where two or more component carriers (CC) are aggregated, is considered for o LTE-A in order to support transmission bandwidths greater than 20MHz. Carrier aggregation can be contiguous or non-contiguous. This technique, as a bandwidth extension, can provide significant benefits in terms of peak data rate and. the cell throughput, compared to the non-aggregate operation as in LTE Rel-8.
    A terminal can simultaneously receive one or multiple component carriers, depending on its capabilities. The LTE-A terminal with reception capability beyond 20 MHz can simultaneously receive transmissions on multiple component carriers. A Rel-8 LTE terminal can receive single component carrier transmissions only, as long as the component carrier structure follows the Rel-8 specifications. In addition, it is required that LTE-A must be compatible with LTE Rel-8 in the sense that an LTE terminal of Rel-8 must be operable in the LTE-A system, and that an LTE-A terminal must be operable, in a Rel-8 LTE system. Figure 1C shows an example of carrier aggregation, where the component carriers M of Rel-8 are combined together to form MH Rel-8 PN (eg, 5H = 20MHz 100MHz given M = 5). Rel-8 terminals receive/transmit one component carrier, while LTE-A terminals can simultaneously receive/transmit on multiple component carriers to achieve higher (wider) bandwidths. It was agreed that up to five CCs can be aggregated in LTE-Advanced, in both FDD and TDD systems. Figure 1D shows the use of carriers, aggregate components, in terms of system bandwidth. In Figure 1D, the total system bandwidth is shown as 100 MHz (frequency). In case 1, a first case of LTE-A with the component carriers aggregated, all this band is aggregated and used by a single UE device. In case 2, the bandwidth is partially aggregated into two 40 MHz groups, leaving a 20 MHz pool. This remaining bandwidth can be used, for example, by a LTE UE Release 8, which requires only 20 MHz. It should be noted that the CA configuration is UE-specific, meaning that Rel-8 UEs can operate on each of the five carriers shown. In case 3, none of the DCs are aggregated and therefore five 20 MHz components are available for use by five different UEs. 3GPP TS 36.211 V9.1.0 (2010-03) Third Generation Partnership Project Technical Specification; Technical Specification of the Radio Access Group Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Channels and Modulation (Release 9) describe in section 5.4.1 the PUCCH 1, 1a and 1b formats.
    In LTE TDD Rel-8 the UE has the possibility to report the ACK/NACK feedback associated with several DL subframes during an UL subframe. Thus, the AÇK/NACK resources corresponding to multiple DL subframes are implicitly reserved in the corresponding UL subframe (ie, based on the mapping between the ACK/NACK resources and the first part of the corresponding CCE PDCCH). Explicit PUCCH resource allocation is applied to a persistently scheduled PDSCH.
    For the LTE-Advanced system it was agreed in 3GPP RAN1 # 58bis to support the mapping of ACK/NACK resources into a UE-specific UL CC. For the LTE-Advanced TDD system, this implies the fact that several ACK / NACK resources (corresponding to multiple DL subframes in the time domain and multiple (DL) CCs in the frequency domain) need to be allocated in a specific UE -CC ( UL), during a single UL subframe.
    It can be expected that this approach will increase the allocation/consumption of PUCCH resources in the EU-specific UL CC. From a resource consumption standpoint, it would be desirable to provide an efficient 1a/1b PUCCH format resource allocation for LTE-Advanced TDD. SUMMARY
    The above and other problems are overcome and other advantages are realized by using exemplary embodiments of the present invention.
    In a first aspect of exemplary embodiments of the present invention, a method is provided which comprises, when in time division duplex mode of operation with a user equipment, allocating uplink physical control channel resources by reserving resources of the uplink physical control channel with a granularity of a negative acknowledgment/acknowledgement (ACK/NACK) packet, and sending an indication of the uplink physical control channel resources allocated from a network access node to the user's equipment.
    In another aspect thereof, exemplary embodiments of the present invention provide an apparatus comprising a processor and a computer program memory, including code, wherein the program code and computer memory are configured to, with the processor. , cause the apparatus, at least once in time division duplex mode of operation with a user equipment, to allocate physical uplink physical control channel resources by reserving physical control channel resources uplink physical channel with a granularity of a negative acknowledgment/acknowledgement (ACK/NACK) packet, and sending an indication of the uplink channel physical control channel allocated resources from a network access node to the user's equipment.
    In another aspect of this, exemplary embodiments of the present invention, a method is provided which comprises obtaining in a user equipment a single uplink format 1a/1b physical control channel resource allocation, where resources physical uplink control channel are reserved with a granularity of a negative acknowledgment/acknowledgment (ACK/NACK) packet, performing ACK/NACK aggregation through spatial codewords, where one ACK/NACK bit packetized per carrier component/subframe is generated) and selecting a constellation point for uplink transmission based on a value of a packed ACK/NACK bit, and a value of a downlink assignment index of a last physical control channel downlink received within an ACK/NACK packet.
    In yet another aspect of this, the . exemplary embodiments of the present invention provide a method comprising obtaining in a user equipment an allocation of a plurality of format 1a/1b physical uplink control channel resources, where the physical link control channel resources ascendant are reserved with a granularity of a negative acknowledgment/acknowledgement (ACK/NACK) packet, and select one. of a plurality of format 1a/1b physical uplink control channel resources for sending a packetized ACK/NACK result based on a value of a downlink assignment index of the last received physical downlink control channel inside an AÕK / NÁCK package. BRIEF DESCRIPTION OF THE DRAWINGS
    In the figures of the attached drawings: Figure 1A reproduces Figure 4.1 of the 3GPP TS 36.300, and shows the general architecture of the EUTRAN system. Figure 1B shows another view of the EUTRAN system. Figure 1C shows an example of carrier aggregation as proposed for the LTE-A system. Figure 1D shows the use of aggregated component carriers, in terms of system bandwidth. Figure 2 shows a simplified block diagram of various electronic devices that are suitable for use in practicing exemplary embodiments of the present invention. Figure 3 illustrates the maximum ACK/NACK bundling. Figure 4 illustrates time domain packaging and CC domain for ACK/NACK. Figure 5A shows a first mode of resource allocation in 1a/1b format for maximum ACK/NACK bundling of PUCCH. Figure 5B is a table illustrating the selection of the constellation of points for the embodiment of Figure 5A. Figure 5C shows a second mode of resource allocation in 1a/1b format for maximum PUCCH ACK/NACK bundling. Figure 6 illustrates a grouping of the CC and conventional TDD subframe. Figure 7 illustrates an exemplary embodiment of a DAI encoding value. Figure 8 illustrates another exemplary embodiment of the DAI encoding value. Figure 9 illustrates the patterns used for ACK/NACK signaling. Figure 10 illustrates in detail one of the ACK/NACK signaling patterns of Figure 9. Figures 11A, 11B and 11C, collectively referred to as Figure 11, each consist of a logical flowchart illustrating the operation of a method, and a result of executing computer program instructions contained on a computer-readable medium, in accordance with exemplary embodiments of the present invention. DETAILED DESCRIPTION OF THE INVENTION
    Exemplary embodiments of the present invention relate, at least in part, to an LTE-Advanced wireless communication system that is expected to be implemented in the 3GPP LTE Rel-10 (although the exemplary embodiments are not limited to just LTE Rel-10). More specifically, the exemplary embodiments are directed towards allocation in the 1 a/1 b PUCCH format (i.e., ACK/NACK resource) in the case of component carrier (CC) aggregation in the TDD mode.
    Generally, TDD operation implies the use of single carrier which is the time between multiplex transmissions from eNB to UE and transmissions from UE to eNB.
    Exemplary embodiments focus on resource allocation in the 1a/1b PUCCH format and provide an efficient distribution technique that is applicable, but not limited to, the LTE-Advanced TDD system.
    As noted above, in LTE Rel-8, the PUCCH resource for ACK/NACK feedback corresponding to a dynamically programmed PDSCH is implicitly determined by the first CCE of the corresponding PDCCHs. In LTE-Advanced, this kind of implicit ACK/NACK resource reservation scheme must be preserved at least for the case of the inversely compatible DL CC paired with an UL CC. However, the dynamic ACK/NACK reservation feature for all crossed CCs in the same way as done for the paired DL CC will result in an inefficient use of the PUCCH resource. This would basically require reserving the dynamic ACK/NACK resources corresponding to all DL CCs in each of the UL CCs.
    Furthermore, for multiple ACK/NACK resources of the LTE-Advanced TDD system (corresponding to multiple DL subframes in the time domain and multiple DL CCs in the frequency domain) need to be allocated in a UE-specific CC (UL) during a single UL subframe. It can easily be seen that such "complete implicit resource allocation", as is done in Rel-8, will result in an unacceptable resource consumption for the UE-specific CC.
    It is noteworthy that for the LTE-Advanced TDD system the ACK/NACK allocation will continue to be an important element, as in TDD Rel-8, to ensure UL coverage. This will be the case especially for ACK / NACK in PUCCH 1a/1b format.
    As discussed in 3GPP RAN TSG GT1 Meeting #60bis, R1-101886, Beijing, China, 12-16 April 2010, Agenda theme: 6.2.4.1, Source: Nokia,. Nokia Siemens Networks, Title: "UL ACK/NACK Feedback in LTE-A TDD", for ACK/NACK feedback over PUCCH 1a/1b format in LTE-Advanced TDD, the following options are promising: - ACK/NACK packaging , as shown in Figure 3; - partial ACK/NACK packaging; CC domain bundling plus channel selection, as shown in Figure 4, and - partial ACK/NACK bundling: p time domain bundling plus channel selection, also as shown in^Figure 4.
    Now discussing in more detail the proposals made in R1-101886, it is said that CA presents additional degree of freedom (compared to TDD Rel-8) for PDCCH transmitted in DL. A consequence of this is that more ACK/NACK bits (eg up to 20 bits, with 5 carrier elements) need to be supported during an uplink subframe. More specifically, TDD support Rel-8 at most 4 bits of ACK/NACK (single component carrier) and hence 4 bits times 5 ccs = 20 bits. In principle, even more than 20 bits can be considered for some TDD configurations. There are many TDD-specific issues that need to be taken into account with regard to ACK/NACK signaling, including which container is used for various ACK/NACK bits, how to reduce the number of ACK/NACK bits in coverage cases limited, and how to handle PDCCH error cases.
    For UL ACK/NACK feedback in LTE-A TDD, an UL subframe can be associated with PDSCH multicasts in: - multiple CCs in frequency domain (depending on UE setting =.ÇCs), and - multiple DL subframes in the time domain (depending on the configured TDD configuration).
    It can be noted that for TDD, DL / UL the time domain asymmetry already exists in LTE Rel-8. Therefore, a set of mechanisms has already been specified to support ACK/NACK signaling that corresponds to multiple DL subframes during a single UL subframe. . More specifically, in TDD Rel-8 both the PUSCH and PUCCH can carry ACK/NACK(s) corresponding to multiple DL subframes. The following modes have been specified. ACK / NACK packaging:
    In this mode, an "AND" operation is performed on multiple ACK/NACK bits within one "wrap window" per codeword, and will generate one or two ACK/NACK bits packed for feedback. Such mode is useful for limited UE coverage. ACK / NACK multiplexing:
    In this mode, an "AND" operation is performed through spatial codewords (ie, ACK / NACK spatial packing) and ACK / NACK multiplexing is achieved through a channel selection method, which allows an increase in DL throughput, compared to just using ACK/NACK bundling. Switching between these modes is UE-specific and can be configured at high layer.
    In TDD Rel-8 so to cope. with p possible error cases due to ACK/NACK bundling, the Downlink Assignment Index (DAI) was included in the UL grant and most of the DL grants. The related DAI coding methods have been specified in order to balance the case of error handling, programming flexibility and other requirements.
    As can also be noted further, in R1T1.0.1886, taking into account the fact that all these mechanisms have been carefully optimized during the standardization of Rel-8, which can be retained for viable solutions to signal multi feedback -ACK/NACK also in LTE-A. Therefore, it is desirable that the current mechanisms specified in TDD Rel-8 are reused as much as possible in LTE-A.
    A proposal R1-101886 is such that the ACK/NACK feedback mechanisms specified in TDD Rel-8 should be reused as much as possible in LTE-A.
    In TDD LTE-A, carrier size increases the payload component of ACK/NACK compared to TDD Rel-8. Thus, the PUCCH 2 format can be considered as an additional container for increasing the number of ACK/NACK bits (in addition to the 1a/1b format of PUCCH and PUSCH), .
    Based on the above observations, it is further stated in R1-101886 that the following ACK/NACK modes/containers have to be considered in TDD LTE-A. (A) As specified in TDD Rel-8, PUCCH 1a/1b format could be used as the ACK/NACK container for small and medium ACK/NACK payload cases in LTE-A TDD. The following ACK/NACK feedback modes could be supported:
    Full Packing Mode: * Starting with TDD Rel-8, it is mainly used for a small number of ACK/NACK feedback bits. * As in TDD Rel-8, 1 or 2 bit ACK/NACK packets will be generated through "AND" operation on various ACK/NACKs.. . * In LTE-A TDD, such mode will be (still is) significant for limited coverage of UEs and will serve as an ACK/NACK takedown mode. Channel selection mode: * From TDD Rel-8, which is mainly used for the average number of bits of ACK/NACK (eg maximum 4 bits). * In LTE-A TDD, the channel selection mechanism specified in TDD. Rel-8 can be fully utilized. * In LTE-A TDD, additional bundling may be needed to adjust the ACK / NACK payload, with multiplexing capability. (B) In LTE-A TDD, PUCCH format 2 is a realizable ACK I NACK container for large ACK/NACK payloads. (C) In LTE-A TDD, switching between the above modes could be UE-specific and higher-layer configuration, as in TDD Rel-8.
    Furthermore, for ACK/NACK feedback, simultaneous transmission of several PUCCH channels will result in a non-optimal cubic metric property, and thus a significant increase in power consumption in the UE. Thus, ACK/NACK feedback should be based on a single PUCCH transmission rather than a simultaneous transmission of multiple PUCCHs.
    It is further proposed that in R1-101886-A for LTE TDD, PUCCH format 1a/1b, PUCCH format 2 are considered as potential PUSCH containers for ACK/NACK feedback signaling, which both complete bundling and channel selection modes must be supported with PUCCH 1a/1b format, and ACK/NACK feedback must be based on a single PUCCH transmission rather than simultaneous transmission of multiple PUCCHs.
    It is noted in R1-101886 that in TDD Rel-8, ACK/NACK bundling was specified to maximize ACK/NACK coverage through spatial and temporal domain bundling.
    In LTE-A TDD, ACK/NACK bundling is still an essential element; for ACK/NACK feedback, especially when considering the limited container capacity and the increased ACK/NACK overload potential. Thus, the following packaging modes (and their combinations) should be considered as candidates for reducing ACK/NACK feedback overhead in UL: (A) Spatial domain packaging: * As in TDD Rel-8, the " AND" is performed using spatial codewords and generates a bundled ACK/NACK result. * From the above perspective of ACK,/NAÇK, this effectively compresses the ACK/NACK overhead from the spatial domain. * From the DL transfer point of view, the loss can be reduced. (B) Time domain bundling: * In TDD Rel-8, this bundling has already been adopted for "ACK/NACK bundling" mode. .. , * In LTE-A TDD, time domain packets can also be considered. (C) CC domain packaging: * The "AND" operation is performed on multiple CCs configured to generate the ACK/NACK packet. * From the above perspective of ACK/NACK, this effectively compresses the ACK/NACK payload in the CC domain. * ACK/NACK CC domain bundling outperforms ACK/NACK time domain bundling in terms of DL throughput, especially for cellular edge throughput.
    It is further proposed in R1-101886-A that in LTE-A TDD spatial domain packing, time domain packing, and CC domain packing (and their combinations) can be used to reduce ACK / NACK. The ACK / NACK CC domain bundling can have priority from the DL transfer point of view.
    In TDD Rel-8, and accompanied with ACK/NACK bundling, the DAI approach was included in DL/UL grants and the encoding method was specified to handle potential error cases.
    In LTE-A TDD, DAI is necessary, as DAI is still the essential element for UL ACK/NACK feedback in LTE-A TDD to handle error cases related due to lack of DL grants within the "window of packaging" (ie same motivation as there is in TDD Rel-8). Furthermore, in LTE-A TDD a "wrapping window" can be increased both for the time domain and the CC domain.
    Regarding the DAI field bitwidth, in TDD Rel-8 the DL/UL DAI bitwidth is 2-bits. In LTE-A TDD, a similar DAI bitwidth is preferred to avoid specific additional TDD overhead for most grants. Furthermore, and with regard to a DTX to ACK probability requirement, in TDD Rel-8, in the case of ACK/NACK bundling a DTX to ACK error can occur due to a lack of DL grant. DTX target probability for ACK is set to be 1E-4. In TDD Rel-10, the same level of reliability can be aimed for.
    Having thus summarized what is indicated in R1-101886, it can be observed that for the transmission in 1 a/1 b format of PUCCH with ACK / NACK bundling the reservation of PUCCH resources for each PDCCH is unnecessary since there will only be one (or two) bits of ACK/NACK(s) generated within each marshaling window. As a result only one PUCCH channel needs to be used for ACK/NACK transmission. This observation suggests that a one-to-one mapping between the allocation between the 1a/1b format of PDCCH and PUCCH (as in LTE Rel-8) will result in excessive resource consumption, especially in a TDD system configured for the ACK / NACK bundling mode.
    Exemplary embodiments of the present invention provide effective methods to overcome the problem of inefficient allocation in the 1a/1b PUCCH format in the LTE-Advanced TDD system.
    Previously, there have been several proposed methods for allocating/reserving ACK/NACK resources in LTE-Advanced. However, these methods have mainly focused on the FDD system and not the TDD system.
    One possible approach is to assume that the dynamic ACK/NACK space is composed of two parts: (A) the conventional dynamic ACK/NACK space as defined in LTE Rel-8; and (B) a new CC-ACK/NACK dynamic crossspace.
    In this approach, it becomes possible to use a multiple-to-one mapping between the CCEs and ACK/NACK resources in the CC PUCCH cross dynamics feature, which can be configured by higher protocol layers. This can be considered as a form of resource compression in the 1 a/1 b PUCCH format.
    In 3GPP RAN TSG GT1 Meeting # 59bis, R1-100243, Valencia, Spain, January 18-22, 2010, Source: Huawei, Title: "UL ACK/NACK resource allocation for Carrier aggregation", it is stated that reservations can be made resources M of ACK/NACK for a total of N CCEs, where M <N. This can be considered for a linked but unpaired DL CC to reduce the implicit ACK/NACK resource overhead. A similar proposal was also made in 3GPP RAN TSG GT1 Meeting #59bis, R1-100363, Valencia, Spain, 18 - 22 January 2010, Source: Panasonic, Title: "PUCCH resource allocation for Carrier aggregation".
    Resource compression in the aforementioned 1a/1b PUCCH format (ie, multiple-to-one mapping between CCEs and PUCCH resources) is achieved through implicit and explicit signaling, and may introduce additional limitations of scheduling in order to achieve a more efficient compression of resources. This approach is, however, not optimal for use in the LTE-Advanced TDD system. That is, in the TDD system you have more freedom for ACK/NACK resource mapping as there can be a mapping of multiple CCs and multiple DL subframes to a UE-specific CC during an UL subframe. Furthermore, and as discussed above, the ACK/NACK bundling operation provides a new property for resource allocation in PUCCH 1a/1b format that can be used for efficient resource compression.
    In accordance with exemplary embodiments of the present invention, an efficient technique is provided to accommodate resource allocation in 1a/1b PUCCH format in the LTE-Advanced TDD system supporting CA.
    Before describing in detail the exemplary embodiments of the present invention, reference is made to Figure 2 to illustrate a simplified block diagram of various electronic devices and apparatus that are suitable for use in practicing the exemplary embodiments of the present invention. In Figure 2, a wireless network 1 is adapted for communication via a wireless link 11 with an apparatus, such as a mobile communication device, which may be referred to as a UE 10, via a network access node , such as a node B (base station), and more specifically an eNB 12. Network 1 may include a network control element (NCE) 14, which may include the MME / SGW functionality shown in Figure 1A, and which provides connectivity to an additional network, such as a telephone network and/or a data communications network (eg internet). The UE 10 includes a controller, such as at least a computer or a data processor (DP) 10A, at least one non-transient computer readable memory means built-in such as a memory 10B (MEM) that stores a program of instructions. of computer (PROG) 10C, and at least one suitable radio frequency (RF) transceiver 10D for bidirectional wireless communications with the eNB 12 via one or more antennas. The eNB 12 also includes a controller, such as at least a computer or a data processor (DP) 12A, at least one computer readable memory medium incorporated such as a memory 12B (MEM) which stores a program of computer instructions. (PROG) 12C, and at least one RF transceiver 12D suitable for communicating with the UE 10 via one or more antennas (typically multiple when multiple input/multiple output (MIMO) operation is in use). The eNB 12 is coupled via a data/control route 13 to the NCE 14. Route 13 can be implemented as an S1 interface shown in Figure 1A. The eNB 12 can also be coupled to another eNB via data/control route 15, which can be implemented as an X2 interface shown in Figure 1A.
    For the purposes of describing exemplary embodiments of the present invention, the UE 10 can be assumed to also include an ACK/NACK generation and transmission unit or module or function 10E that operates in accordance with the exemplary embodiments of the present invention, and the eNB 12 includes a complementary ACK/NACK reception and interpretation unit or module or function 12E. The eNB 12 also includes a PUCCH resource allocation unit or 12F module or function that operates as described below.
    At least one of PROGS 10C and 12C is assumed to include program instructions which, when executed by the associated DP, allow the device to function in accordance with exemplary embodiments of the present invention, as will be discussed in more detail below. That is, the exemplary embodiments of the present invention can be implemented, at least in part, by software. computer executable by the DP 10A of the UE 10 and/or the DP 12A of the eNB 12, either via hardware, or by a combination of software and hardware, (and firmware). For example, the ACK / NACK generation and transmission unit or module or function 10E, the ACK / NACK reception or interpretation unit or module or function 12E receive and the resource allocation unit of PUCCH or module or function 12F can each be embedded as hardware or executable code/software stored in memory 10B and 12B, or as a combination of executable code/software and hardware (and firmware).
    In general, the various modalities of LIE 1Ò may include, but are not limited to, cell phones, personal digital assistants (PDAs) with wireless communication capability, handheld computers with wireless communication capabilities, image capture devices, such as such as digital cameras with wireless communication capabilities, gaming devices with wireless communication capabilities, music storage devices and playback devices with wireless communication capabilities, Internet devices that allow wireless Internet access and browsing, as well as portable units or terminals that incorporate combinations of such functions.
    Computer readable MEMs 10B and 12B can be of any type suitable for the local technical medium and can be implemented using any suitable data storage technology such as devices: semiconductor based memory, random access memory, memory only. read-only, programmable read-only memory, flash memory, magnetic memory devices and systems, memory devices and optical systems, fixed memory and removable memory. PD 10A and 12A can be of any type suitable for the local technical environment, which may include one or more of the general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multi architectures. -core, as non-limiting examples.
    Turning now to a more detailed description of the exemplary embodiments of the present invention, for the allocation of resources in 1a/1b format of PUCCH in TDD LTE-Advanced, resources in 1a/1b format of PUCCH are reserved with the granularity of "an ACK/NACK packet". An "ACK/NACK packet" can be interpreted as a set of TDD-subframe(s) and the carrier(s) component(s) it is configured so as to. form a feedback subset of ACK/NACK to be sent in the UL as a response to received data (PDSCH) in the DL By "configured to form a feedback subset of ACK/NACK" means that the configuration is , in a typical (and non-limiting) request: made by the eNB 12, performed using RRC signaling between the eNB 12 and the UE 10, and is semi-static in nature.
    To generalize this concept, the number of format resources, PUCCH 1a/1b reserved for each "ACK /.NACK packet" can be predefined or configured by an upper protocol layer. The exact value may be different for different ones. ACK/NACK feedback/packaging schemes.
    For example, the total number of PUCCH format 1a/1b resources allocated to a given UE 10 by the PUCCH resource allocation unit 12F depends on the adopted ACK/NACK bundling scheme is the number of "ACK/NACK packets NACK". More specifically, the total number of PUCCH format 1a/1b resources allocated to certain UE 10 scales is the number of "ACK/NACK packets", which in turn depends on a specific configuration of the UE.
    With respect to resource allocation, the resource positions of the PUCCH 1 a/1 b format assigned to a given ÜÈ 10 are derived in a predetermined manner based on implicit or explicit resource allocation signaling (or a combination of implicit signaling and explicit allocation of resources).
    Furthermore, the start position of the PUCCH format 1a/1b resources assigned to a particular UE 10 is explicitly indicated by means of RRC signaling, or alternatively, is indicated implicitly by means of some other specific EU-parameters (by example, the introduction of a relationship between the means of ACK/NACK and the starting position of an EU-specific search space).
    The "UE-specific search space" corresponds to a predefined set of control channel elements (CCE) available to transmit PDCCH to a given UE (there is a one-to-one mapping between the first GCE and the PUCCH ACK resource / NACK in LTE Rel-8). The entire CCE-space (from a single UE perspective) is divided into (i) a common search space (available to all UEs), (ii) an UE-specific search space (available to a given UE ), and a search space that is not available in all data for the UE.
    Regarding the number of allocated PUCCH resources in 1a/1b format for different ACK/NACK bundling schemes, various methods can be used to support "full ACK/NACK bundling" and "time-domain ACK/NACK bundling / CC domain bundling plus channel selection" as discussed in the aforementioned R1-101886.
    For example, and for the case of complete ACK/NACK bundling (ie a single "ACK/NACK packet"), the number of resources allocated in format 1a/1b. PUCCH can be preset or configured from the top layer.
    Referring to Figures 5A and 5B (discussed in more detail below), in a first embodiment, a single resource in PUCCH 1a/1b format is assigned to a given UE 10 via the resource distribution unit PUCCH 12F, and the provided result of ACK/NACK is then sent by the ACK/NACK generator and the transmitter 10E via the allocated resource. Furthermore, ACK/NACK bundling on all space codewords can be applied. In addition, selection of a constellation of points based on the value of the packed ACK/NACK bit and the DAI of the last PDCCH received within the packing window can be applied.
    In a second embodiment (referring to Figure 5C). multiple resources of PUÇCH format 1a/1b are, assigned to a given UE 10, and the resource selected to send the provided result of. ACK / NACK depends on the DAI value of the last PDCCH received inside the packing windowβ.
    In yet another example, and for the case of ACK/NACK time domain bundling and/or CC domain bundling plus channel selection, a resource in PUCCH 1a/1b format is allocated by "ACK/NACK packet 11. Therefore, the total number of resources in PUÇCH format 1a/1b assigned to a given UE 10 depends on the number of "configured ACK/NACK packets".
    Channel selection is done among multiple resources allocated in 1 a/1 b PUCCH format, and is used to transmit the generated (packaged) ACK/NACK results. Exemplary rules that can be used for implicit resource allocation are now described.
    In the LTE-Advanced TDD system, the position of resources in PUCCH 1a/1b format allocated to a given UE 10 are determined in a predefined manner as follows: . where • UEpara is a specific parameter, which is decided by the RRC signaling, or other UE-specific parameters (eg the starting position of the UE-specific search space). • RAindex , where M is the total number of PUCCH format 1a/1b resources allocated to a given UE 10, and M corresponds to the number of ACK/NACK packets (which can be of default configuration or in higher layer).
    As an exemplary realization, f(UEpara,RAindex) can have the following form: fÇUEpara '^^index ) =: PUCCH + ' UEpara + ^^index ) C OR f(UEpara ■> EAindex) = NPUCCH + (M • UE to + ) mod C where " •" means a "multiply" operation, where "mod" is modulo, and where NPUCCH and C are values defined by the eNB 12's PUCCH 12F resource allocation unit.
    For full ACK/NACK bundling, an exemplary implementation is such (as shown in Figure 5A): • a single resource in PUCCH 1a/1b format is assigned to a given UE 10. • ACK/NACK bundling via Spatial codewords are applied (one CC-packed ACK/NACK bit / received subframe is generated). • constellation point selection based on the value of the bundled ACK/NACK bit and the DAI of the last PDCCH received within the bundling window is applied, as shown in the table in Figure 5B.
    For full ACK/NACK bundling another exemplary implementation is such (as shown in Figure 5C): • The number of allocated resources in PUCCH 1a/1b format for a given UE 10 is predefined or configured in upper layer (denoted as M ). • The resource used to send the bundled ACK/NACK results depends on the DAI value of the last PDCCH received within the bundle window. • One implementation consists of the resource in PUCCH 1a/1b format (n mod M) that is used to transmit the given result of ACK / NACK, where n is the DAI value of the last received PDCCH, and M is the total number of resources in format 1 a/1 b of PUCCH allocated to the UE 10 by the resource allocation unit PUCCH 12F of the eNB 12.
    The DAI coding principle depicted in Figures 5A and 5C is explained in more detail in co-pending US patent application 12/497, 434, filed July 2, 2009, by the same inventors of the present patent application and entitled "System and Method for ACK/NACK Feedback in TDD Communications, "hereinafter referred to as the "Common Property Application". The DAI coding principle in accordance with the common property application will be briefly summarized here with reference to Figures 6-10.
    In 3GPP RAN TSG GT1 meeting # 56bis, R1-091526, Seoul, Korea, 23 - 27 March 2009, Source: CATT, "UL AÇK/NACK transmission in LTE-A", the concept of CC bundling is described. A number of component DL carriers and TDD subframes are arranged to form groups of C; d, c2, c3, c4, in a predefined way. These C groups are configured to generate group specific ACK / NACK / DTX information based on up to M input bits per group. The specific ACK / NACK / DTX information group is generated by bundling or multiplexing the ACK / NACK bits corresponding to the different CC component carriers, TDD subframes and spatial layers within the group. Regardless of the bundling shown in Figure 6, resource allocation grants (UL/DL) transmitted on PDCCH corresponding to PDSCH(s) of different component carriers and TDD subframes can be coded separately. Figure 6 illustrates the concept of packaging. On component carriers, the C groups d, c2, c3, c4 and are shown with different shading, and the TDD subframes are shown from left to right in the figure. ACK/NAK message information is shown in different subframes. TDD on the component carriers, for groups d -c4, labeled N/A. Embodiments of the invention in accordance with the common property application use this packaging concept as detailed below.
    Proposed conventional approaches do not address the ACK/NACK signaling required to support LTE-A. Specifically, prior art approaches do not provide ACK/NACK uplink signaling that takes into account the error case handling necessary to separate PDCCH UL and DL grants when these dedicated resource allocation grants correspond to different component carriers ( CCs) and TDD subframes.
    Embodiments of the invention in accordance with the common property application provide features that can be used together to effect ACK/NACK signaling on the PUCCH for LTE-A systems taking into account error cases. In one embodiment, a new DAI encoding is provided for the aggregated CC case as used in LTE-A. In the embodiment of a method, a DAI intra-group coding method is used. In an alternative embodiment, an inter-group encoding method for the DAI is used. In both of these embodiments two DAI bits are included in the downlink PDCCH grant. The use of DAI coding in the downlink grant allows the UE 10 and the eNB 12 to handle error cases related to the packaging of ACK/NAÇK feedback signals corresponding to the multiple CCs and TDD subframes. Such error cases occur when a PDCCH #downlink grant allocation in the specific CC / TDD subframe is not correctly received by the UE 10. Without the inventive DAI encoding according to the same owner application, the UE and eNB they would not be able to correctly process these errors.
    In another aspect of the invention, according to the same proprietary application, modalities provide the arrangement for the feedback of the ACK/NACK signal in the PUCCH on top of the configurable bundling. In an exemplary embodiment scheme, a semi-static group is used. In an alternative embodiment, dynamic packaging is used. The ACK/NACK signals are then transmitted in the UL to report the results of previous DL transmissions. Figure 7 presents a simple diagram on a method for encoding the DAI in the "in-group" embedding method. In this exemplary embodiment, the DAI encoding is group specific, that is, the DAI encoding starts over with each of the groups. In the embodiment, a DAI counter is used when the count is equal to the number of previous grants with the group. For each group, the DAI counter is incremented from 0, 1, ... Ni-1, where Ni is the number of DL grants within the i-th group. The DAI counter is numbered first in the frequency domain and time domain for each group and the number starts at 0. Equation 1 expresses the value of the DAI counter.
    DAI counter = 0.1,2,...N, -1; where N|= .number of DL concessions in the nth group (1). The DAI Value is then obtained. by applying a module operation, here, MOD 4 is used. . , Equation 2 provides an expression for this step: ValorDAI - Counter DAI MOD 4 (2) Figure 7 illustrates a non-limiting example, an exemplary case of the application method. Here, there are 4 CCs and 4 subframes divided into four groups. There are 2, 1, 1 and 2 DL concessions in the 4 groups, respectively. The groups are indicated as Group 1, Group 2, Group 3, Group 4, and by the shading in Figure 7.
    For the first group, the first DL grant has no predecessor, so the count is 0. For the second DL grant in the first group, the count is 1. In group 2, there is only one DL grant, so it receives a count of DAI 0. Similarly, in group 3, there is only one DL grant and it also receives a count of 0. In group 4, the first DL grant starts counting from 0 and then the second DL grant receives a count of DAI 1. Since the MOD 4 operation does not change the count values, in this example the DAI values are shown as 0, 1 for Group 1, Q for Group 2, 0 for Group 3 and de 0, 1 for Group 4, respectively. In an alternative embodiment to the DAI encoding method, according to the commonly owned application of the invention, "inter-group" encoding is used. In this approach, the DAI counter is started at 0 and incremented to the total number of DL grants within the UE's receive bandwidth for the frequency domain and within the scheduling window for the time domain. That is, the DAI counter is not reset for each group. Thus, the DAI counter = 0.1, 2, ... N-1, where N is the total of DL pockets observed for all groups. Equation 3 provides a simple expression. Once the DAI count is determined, a MOD 4 operation is performed for $e to get a DAI value. Equation 4 provides this expression. DAI Value = 0.1,2...N-1, where N is the total number of DL grants (3). ValueDAI = Counter DAI MOD 4 (4) In Figure β, an application example of the present embodiment is shown for a non-limiting illustrative example. In Figure 8 four groups are again indicated in the programming window, with 4 component carriers and 4.TDD subframe. Groups are indicated by shading from Group 1, Group 2, Group 3, and Group 4. The numerical values shown in some blpqos represent the DAI value determined using the method of embedding between groups, as follows.
    For Group 1, there are two DL concessions. For Group 2, there is a downlink grant. For Group 3, there is a DL.e concession for the
    Group 4, there are two concessions.DL So, in this illustrative case, there are a total of six DL concessions. Using the interministerial prupo method for the DAI counter, the counter will be incremented by 0... 5. Applying the DAI value step method using MOD 4, then ps DAI values mpstradps in Figure 8. are obtained, for example, 0.1 for Group 1, 2 for Group è, 3 for Group. 3, and 0.1 for Group 4. These values are represented in the appropriate TDD/CC subframe block of Figure 8.
    The DAI encoding schemes of the two alternative embodiments are shown in Figures 7 and 8. Since the DAI encoding schemes are still formed as 2-bit DAI values, there is no compatibility issue with compatible usage. LTE Rel-8 systems in TDD mode. The use of embodiments of the invention according to the same owner's application is compatible with the use of Rel-8 equipment.
    In another aspect of the embodiments of the invention, in accordance with the same proprietary application, methods are disclosed for providing the . ACK / NACK information return. Two alternative approaches to method embodiments are provided that direct the trade-off between system performance (efficiency) and UL coverage in the LTE-A system in TDD mode.
    In one embodiment of the method, semi-static bundling is used to provide the ACK/NACK feedback. In this mode, C groups and M subgroups are defined by upper layer actions. This information can be transmitted to the UE as control bits of an initialization message. This approach can be used in conjunction with any of the above-described intergroup or intragroup DAI coding schemes.
    In an alternative method embodiment, dynamic bundling for ACK/NACK feedback can be used. In this embodiment, groups C and subgroups M are formed according to parameters C and M, which are signaled to the UE by the eNB. These parameters can be cell specific or EU-specific. The group division between CCs and subframes can be done in a predefined way. As an approach, which is non-limiting, there may be C.+ groups. Each C+ group contains consecutive [N/C] bits of ACK / NACK and Ç- groups, each contains consecutive [N/C] bits of ACK / NACK, where N is the total number of DL grants observed in UE 10 and C + - N mod C, and C_ = C - C +. The operation is a limit operation, ie [5/2] = 3, for example. The [N/C] operation is a.step operation, that is, [5/2] = 2, for example.
    After the bundling has been set up, the UE can transmit the ACK/NACK information according to the following steps: Step #1: Within each subgroup, the ACK/NACK bits are first bundled in the space domain /CC/time to generate M ACK / NACK feedback bits. Step #2: A technique of, selection, of. channel is applied to carry ACK/NACK feedback M bits per group. Alternatively, some other technique is used to transport the ACK/NACK feedback M bits per group. Step #3: After. the channel have. been selected, the UE transmits the corresponding ACK / NACK / DTX feedback, to parallel C groups, on the selected or preset channels. . Figure 9 illustrates various configurations 1-8 of predefined bundling patterns, which are combined with the embodiment of the ACK/NACK signaling scheme to provide feedback of the ACK/NACK information from the UE, in the PUCCH for example. The shading indicates different groups and the circle shape indicates the subgroups in which the ACK / NACK bundling domain is applied. For example, for configuration 7, 2 groups and 4 subgroups per group are configured. Within each group, four ACK/NACK/DTX feedback information is generated through ACK/NACK bundling within each subgroup. Then, channel selection is performed within each group to carry four ACK / « feedback signals. NACK / DTX. Finally, all ACK / NACK / DTX feedback signals are sent through selected parallel channels in PUCCH format 1b. Figure 10 illustrates a more detailed view of pattern 5 from Figure 9. In Figure 10, DAI encoding for "intergroup" has been applied. ACK / NACK bits corresponding to all observed DL grants (observed by UE 10) are arranged in two groups and three subgroups per group, as shown in Figure 10. Each subgroup provides an indication of ACK / NACK / DTX status by usage ACK / NACK packaging. To transmit this information, proper channel and QPSK constellation point selection (or coding scheme in general) is done within each group to perform ACK/NACK feedback corresponding to 3 subgroups. Finally, the ACK / NACK / DTX feedback information corresponding to the two groups will be transmitted in parallel using two PUCCH format 1b channels, or using another coding scheme corresponding to the two groups. The two arrows in Figure 10 indicate an uplink transmission in parallel (simultaneously in time) over the two channels.
    There is a need for error handling when the UE does not correctly observe all DL grants transmitted by the eNB. There is a risk that the bundled ACK signal is generated during the last N DL grants and that it will be lost at the same time. As an example, consider a case where DL 10 grants within a "program window" are programmed, then the two bits for DAI values will be 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, respectively. If the UE only observes or receives the first 7 DL grants and the last 3 are lost, then from the UE side, it will observe seven DL grants with DAI values 0, 1, 2, 3, 0, 1, 2. Since the DAI indices are continuous, in this example the UE will not be aware of the missing detection of the other 3 DL grants.
    In this case, the uplink error of transmitted packetized ACK/NACK signals does not correspond to the true ACK information. The embodiments of the method below are provided as embodiments of the invention, in accordance with the common property request, which can be used to handle this error situation, known as a "DTX to ACK" error situation.
    First, as a simplified case hypothesis, the most likely case is that the last DL grant is missing. The possibility of the last continuous DL N grants missing is much smaller, so the case is not dealt with here.
    In one embodiment, the UE indicates the last received PDCCH DL grant explicitly always using the PUCCH resource corresponding to the last received DL grant. This embodiment or implementation approach is suitable for at least the case (the transmission of orthogonal resources) ORT to PUCCH in multi-antenna diversity. In this approach, signaling diversity, the UE will use PUCCH diversity based on the use of various PUCCH format 1a/1b resources. In such a case, the UE can select the PUCCH resource that corresponds to the last observation or DL grant received, thus, the eNB receiving the PUCCH knows what is the last DL grant received by the UE.
    This embodiment or execution approach is also suitable for at least the SCTD (Single Carrier Transmission Diversity) case for PUCCH diversity with multiple antennas. SCTD is also referred to as the TRO scheme in 3GPP Ran1 discussions. In SCTD or ORT, diversity gain is achieved by transmitting the PUCCH information even from multiple antennas in the UE with orthogonal PUCCH resources. This scheme is under consideration as a candidate diversity transmission scheme for the PUCCH channel in LTE-A. In such a case, multiple orthogonal PUCCH channels are required for the various antennas. In this embodiment for the signaling method implicitly in the last received DL grant, the UE can select the PUCCH resource that corresponds to the last received observation or DL grant and use it as a PUCCH channel required by the ORT transmission. Upon receiving the PUCCH, the eNB receiving the PUCCH knows that the DL grant is the last DL grant received by the UE. For example, in a non-limiting illustration there are C=1 groups, and the UE has 2 antennas, then in the ORT case, the UE can select the PUCCH channel for an antenna according to the channel selection of the M subgroups , while selecting the PUCCH channel for the other antenna according to the last DL grants received.
    In another alternative approach, the UE indicates the DAI value 'V of the last PDCCH received within each group, implicitly, by means of a channel selection.
    In this alternative approach, the UE performs a PUCCH resource selection (which the UE is otherwise free to select from any of the PDCCH channels within a selected subgroup) in a manner that implicitly indicates the value V. On receiving the UL signals, the eNB will know that it is the last observed DL concession on the UE side, and the eNB and the UE will have a common understanding on the status of the received DL concessions.
    To perform this selection, a subgroup is selected through channel selection, within each subgroup. For an illustrative example, if the DAI of the last received DL grant is 2, then the UE can select the third resource within the selected subgroup to send the ACK/NACK results. In this way, the eNB will know that the DL grant is the last UE grant safely received.
    Thus, embodiments of the invention in accordance with the common property application provide at least two methods for performing DAI encoding, various methods for providing ACK/NACK feedback, and methods for transmitting the information. These embodiments can be used to provide ACK/NACK error handling and to support LTE-A, using TDD systems and aggregated CCs on PUCCH channels while remaining fully compatible with the release 8 of the LTE standards, because, by . For example, the DAI value remains in two bits. Furthermore, no "programming predication" is needed in the time domain, since the first CC "pure counter" encoding of the DAI counter is used.
    The methods described under the common property claim also provide a means of dealing with the "last missing DL grant" in several alternative embodiments.
    The methods described according to the common property request also provide embodiments for the ACK/NACK response from the UE using semi-static packing or dynamic packing. Semi-static bundling is determined at higher levels, the programmer can then direct the UE to use the appropriate standard in order to improve ACK/NACK feedback efficiency while considering traffic signal strength, and quality, etc. In dynamic bundling, the pattern used on the UE side is based on assignments at a time to further improve ACK/NACK efficiency. However, the dynamic approach may require DAI signaling in UL messages, thus increasing signaling traffic resource utilization and increasing UE complexity.
    It should be noted that the DAI encoding described above with reference to Figures 6-10 represents various other exemplary and non-limiting approaches to providing DAI encoding with respect to Figures 5A and 5C of exemplary embodiments of the present invention. The use of exemplary embodiments of the present invention provides a number of technical effects and advantages.
    For example, the use of exemplary embodiments of the present invention provides greater efficiency of PUCCH resources by avoiding unnecessary PUCCH allocations. Furthermore, the possibility of resource collisions is reduced and controllable by the eNB 12. Furthermore, the signaling overhead for resource allocation is reduced. In addition, exemplary embodiments are compatible with channel selection and ACK/NACK bundling modes, such as those discussed above in relation to R1-101886, as well as with the full ACK/NACK bundling mode discussed. in R1 -101886. Figure 11A is a logic flow diagram illustrating the operation of a method, and a result of executing computer program instructions, in accordance with exemplary embodiments of the present invention. According to these exemplary embodiments of an execution method, in Block 1.1A-1, a step in a time division duplex mode of operation with an uplink controller physical channel resource allocation user equipment through gives physical uplink control channel resource reservation with a granularity of a negative acknowledgment/acknowledgement packet (ACK/NACK). In Block 11B-1, there is a step of sending an indication of the uplink physical control channel allocated resources from a network access node to the user equipment. Figure 11B is a logic flow diagram illustrating the operation of another method, and a result of executing computer program instructions, even more, in accordance with exemplary embodiments of the present invention. In accordance with these exemplary embodiments of an execution method, in Block 11A-2, a step of obtaining from a user equipment an assignment of a single physical control channel resource. uplink format 1a/1b, where physical uplink control channel resources are reserved with a granularity of a negative acknowledgment/acknowledgement (ACK/NACK) packet. In Block 11B-2 there is a step of performing p ACK/NACK bundling on all spatial codewords, where one packet of ACK/NACK bits per received component carrier/subframe is generated. In Block 11C-2 there is a step of selecting a constellation point for transmission on the uplink based on a packed ACK/NACK bit value and a value of an assignment index of. downlink of a last physical downlink control channel received within an ACK/NACK packet. Figure 11C is a logic flow diagram illustrating the operation of an additional method, and as a result of executing computer program instructions, also in accordance with exemplary embodiments of the present invention. According to these exemplary embodiments of an execution method, in Block 11A-3, a step of obtaining in a user equipment an allocation of a plurality of format 1 uplink control physical channel resources a/ 1b, where uplink physical control channel resources are reserved with a granularity of a negative acknowledgment/acknowledgement (ACK/NACK) packet. In Block 11B-3, there is a step of selecting uni from a plurality of format 1a/1b uplink physical control channel resources to send a packed ACK/NACK result based on a value of an index. of downlink assignment of the last physical downlink control channel received within an ACK/NACK packet.
    The various blocks shown in Figure 11 can be viewed as method steps, and/or as operations that result from the operation of computer program code, and/or as a plurality of coupled circuit logic elements constructed to carry out the (s) associated function(s). 4 •
    Exemplary embodiments also include a type of apparatus having > at least one processor memory and including computer program code, wherein the program code and computer memory are configured to, with the processor, make the machine, at least when in duplex operation mode । by time division with a user equipment, allocate resources from the physical channel. uplink control, reserving uplink t-coptrol physical channel resources with a granularity of an acknowledgment/acknowledgement packet < negative (ACK/NACK), and sending an indication dpp uplink control physical channel resources allocated from a network access node for the user equipment.
    Exemplary embodiments also encompass apparatus comprising response means, for operating in a time division duplex mode operation with a user equipment, for physical uplink allocation of the control channel, reserving channel resources uplink control physical allocated with a granularity of a negative acknowledgment/acknowledgement (ACK/NACK) packet, and means for sending an indication of the uplink physical control channel resources allocated from an access node the network to the user's equipment. 1
    Exemplary embodiments also include a type of apparatus having at least one processor e.g. memory including computer program code, wherein the program code and computer memory are configured to, with the processor, cause the apparatus to obtain at least one user equipment of a single channel resource allocation format 1a/1b uplink control physical, where physical uplink control channel resources are reserved with a granularity of a negative acknowledgment/acknowledgement (ACK/NACK) packet, to perform ACK/NACK bundling through spatial coding words, where one ACK / NAK bit packed per component carrier / received subframe is generated), and to select a constellation point for uplink transmission based on a value of one ACK / NACK bit packed and a value of a downlink assignment index of a last physical downlink control channel received within an ACK/NACK packet.
    Exemplary embodiments also encompass apparatus comprising means for obtaining from a user equipment a resource allocation of a single physical uplink control channel in the format 1a/1b, where uplink channel control resources Physical are reserved with a granularity of a negative acknowledgment/acknowledgment packet (ACK/NACK packet), means for performing ACK/NACK bundling on all spatial codewords, where one ACK/NACK bit packetized per component/subframe carrier is generated), and means for selecting a constellation point for uplink transmission based on a value of a packetized ACK/NACK bit, and a value of a downlink assignment index of the last physical control channel downlink received within an ACK/NACK packet.
    Exemplary embodiments also include a type of apparatus having at least one processor and memory including computer program code, wherein the program code and computer memory are configured to, with the processor, cause The apparatus obtains at least one user equipment of an allocation of a plurality of uplink control physical channel resources of format 1a/1b, where uplink control physical channel resources are reserved with a granularity of a negative acknowledgment/acknowledgement (ACK/NACK) packet, and select one of the plurality of format 1a/1b uplink physical control channel resources to send a packetized ACK/NACK result based on a value of an index of downlink assignment of a last physical downlink control channel received within an ACK/NACK packet.
    Exemplary embodiments also include an apparatus comprising means for obtaining a user equipment to allocate a plurality of format 1a/1b uplink physical control channel resources, wherein the physical channel means uplink control channels are reserved with a granularity of a negative acknowledgment/acknowledgement packet (ACK/NACK packet), and means for selecting one of a plurality of format 1a/1b uplink control physical channel resources to send a packed ACK/NACK result based on a value of a downlink assignment index of a last physical downlink control channel received within an ACK/NACK packet.
    In general, the various exemplary embodiments may be implemented in hardware or special purpose, circuitry, software, or any combination thereof. For example, some aspects can be implemented in hardware, while other aspects can be implemented in firmware or software that can be executed by a controller, microprocessor or other computing device, although the invention is not limited to them. While various aspects of exemplary embodiments of the present invention may be illustrated and described as block diagrams, flowcharts, or using some other pictorial representation, it is well understood that these blocks, apparatus, systems, techniques, and methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuitry or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
    It should thus be appreciated that at least some aspects of the exemplary embodiments of the invention can be practiced on various components, such as chips and integrated circuit modules, and that the exemplary embodiments of the present invention can be carried out in one apparatus. which is personified as an integrated circuit. The integrated circuit, or circuits, may comprise a circuit (as well as possibly firmware) for which it contains at least one or more of a data processor or data processors, a digital signal processor or the processors, the circuits of baseband and radio frequency circuitry that are configured to operate in accordance with the exemplary embodiments of the present invention. Various modifications and adaptations of the above exemplary embodiments of the present invention may become apparent to those skilled in the art in view of the foregoing description, when read in conjunction with the accompanying drawings. However, any and all modifications are still within the scope of the non-limiting and exemplary embodiments of the present invention.
    For example, although exemplary embodiments have been described above in the context of the system (UTRAN-LTE-A), it should be noted that exemplary embodiments of the present invention are not limited to use with only this particular type of a wireless communication system, and which can be used to advantage in other wireless communication systems.
    It should be noted that the terms "linked", "coupled", or any variant thereof, means any link or coupling, direct or indirect, between two or more elements, and may encompass the presence of one or more intermediate elements between the two elements that are "connected" or "associated". The coupling or linking between elements can be physical, logical, or a combination of these. As used herein, two elements can be considered to be "connected" or "associated", together with the use of one or more wires, cables and/or printed electrical connections, as well as the use of electromagnetic energy, such as energy electromagnetic having wavelengths in the radio frequency region, the microwave region, and the optical (visible and invisible) region, as various non-limiting organizations and non-exhaustive examples.
    Furthermore, the various names used for the described parameters, information elements and other concepts (eg ACK/NACK packets, DAI, etc.) are not intended to be limiting in any respect, as these various parameters, information elements and concepts can be identified by all the appropriate names. In addition, formulas, equations and expressions that are used in a specific application may differ from those expressly disclosed herein. Furthermore, the various names assigned to different channels and channel types (eg PDCCH, <4 PUCCH, PUCCH 1a/1b format, etc.) are not intended to be limiting in any way, as these channels of various types and channel can be identified by any suitable name.
    Furthermore, some of the features of the various non-limiting and exemplary embodiments of the present invention can be used to advantage without the corresponding use of other features. As such, the foregoing description is to be considered merely illustrative of the principles, teachings and exemplary embodiments of the present invention, and not limitation thereof.
    权利要求:
    Claims (24)
    [0001]
    1. Method, characterized by comprising: - when in time division duplex mode of operation with a user equipment, allocating uplink control physical channel resources, reserving uplink control physical channel resources with a granularity of a negative acknowledgment/acknowledgement packet (ACK/NACK), and - sending an indication of the uplink physical control channel allocated resources from a network access node to the user equipment.
    [0002]
    The method of claim 1, characterized in that the physical uplink control channel resources are format 1a/1b resources which are reserved for each ACK/NACK packet and are at least one of the predefined and configured ones.
    [0003]
    The method of claim 1 or claim 2, characterized in that the ACK/NACK packet comprises a set of time division duplex subframe(s) and carrier(s) component(s) which is configured to form a ACK/NACK feedback subset to be sent by the user equipment on the uplink as a response to data received on the downlink.
    [0004]
    4. Method according to any one of claims 1-3, characterized in that a single resource of the uplink physical control channel in format 1 a/1 b is ,,, allocated to a certain user equipment, in which a set of subframe(s) > time division duplex and carrier(s) component(s) is configured to form a single ACK/NACK packet.
    [0005]
    The method of claim 4, characterized in that the selection of the constellation point is based on the value of a packed ACK/NACK bit, and a value of a downlink assignment index of a last received downlink physical control channel inside an AÇK/NACK package.
    [0006]
    A method according to any one of claims 1-3, characterized in that a plurality of format 1a/1b uplink physical control channel resources are assigned to a given user equipment, wherein a set of subframe(s) ) time division duplex and carrier(s) component(s) is configured for at least one ACK/NACK packet.
    [0007]
    A method according to claim 6, characterized in that one of a plurality of format 1a/1b uplink physical control channel resources is selected to send the ACK/NAÇK packet based on a value of an index of downlink assignment of a last physical downlink control channel received within a packet (ACK/NACK.
    [0008]
    Method according to claim 1, characterized by at least one packing of the ACK/NACK time domain and packing of the component carrier domain with the channel selection, at least one resource of the physical link control channel uplink in format 1a/1b be allocated per ACK/NACK packet such that a total number of resources allocated from the physical uplink control channel in Tá/1b format to the user equipment depends on the number of ACK/NACK packets configured from the user's equipment, and wherein channel selection is performed among a plurality of uplink physical control channel allocated resources and is used to transmit ACK/NACK packet results.
    [0009]
    9. Method according to claim 1, characterized in that the position of allocated resources of the format 1a/1b uplink physical control channel assigned to a given user equipment (UE) is determined according to: Where UEpara is a UE-specific parameter; and *jRA,'dejc , where M is a total number of format 1a/1b uplink physical control channel resources allocated to UE 10, and corresponds to a number of ACK/NACK packets.
    [0010]
    10. Computer-readable - non-transient medium, characterized in that it contains the > software program instructions, wherein the execution of the software program instructions by at least one. data processor, results in carrying out operations which comprise carrying out the method of any one of claims 1-9.
    [0011]
    11. Apparatus, characterized in that it comprises: a processor; and a memory including the computer program code, wherein the program code q-- and computer memory are configured to, with the processor, make the apparatus at least - when in split duplex mode of operation of time with a user equipment, allocate channel resources, physical <control. uplink, reserving physical uplink control channel resources with a granularity of a negative acknowledgment/acknowledgement (ACK/NACK) packet, and - sending an indication of the allocated resources of the uplink physical control channel from from a network access node to the user equipment.
    [0012]
    The apparatus of claim 11, characterized in that the physical uplink control channel resources are format 1a/1b resources which are reserved for each ACK/NACKe packet and are at least one of the predefined and configured ones.
    [0013]
    The apparatus of claim 11 or claim 12, characterized in that the ACK/NACK packet comprises a set of time division duplex subframe(s) and carrier(s) component(s) which is configured to form a subset ACK/NACK feedback loops to be sent by the user equipment on the uplink as a response to data received on the downlink.
    [0014]
    Apparatus according to any one of claims 11-13, characterized in that a single resource of the uplink physical control channel in format 1 a/1 b is allocated in a certain user equipment, in which a subframe set( s) time division duplex and carrier(s) component(s) is configured to form a single ACK/NACK packet.
    [0015]
    The apparatus of claim 14, characterized in that the selection of the constellation point is based on the value of a packed ACK/NACK bit, and a value of a downlink assignment index of a last received downlink physical control channel inside an ACK/NACK packet.
    [0016]
    Apparatus according to any one of claims 11-13, characterized in that a plurality of format 1a/1b uplink physical control channel resources are assigned to a given user equipment, wherein a subframe set Time division duplex(s) and carrier(s) component(s) is configured for at least one ACK/NACK packet.
    [0017]
    The apparatus of claim 16, characterized in that one of a plurality of format 1a/1b uplink physical control channel resources is selected to send the ACK/NACK packet based on a value of an allocation index of downlink of a last physical downlink control channel received within an ACK/NACK packet.
    [0018]
    Apparatus according to claim 11, characterized by at least one ACK/NACK time domain bundling and component carrier domain bundling with channel selection, an uplink physical control channel resource in format 1 to /1b be allocated per ACK/NACK packet such that a total number of resources allocated from the uplink physical control channel in format 1a/1b to the user equipment depends on the number of ACK/NACK packets configured by the equipment. user, and wherein channel selection is performed among a plurality of allocated resources of the uplink physical control channel and is used to transmit ACK/NACK packet results.
    [0019]
    19. The apparatus of claim 11, characterized in that the position of allocated format 1a/1b uplink physical control channel resources assigned to a given user equipment (UE) is determined according to: where UEpara is a specific parameter of the EU; and RAMdex = , where M is a total number of format 1a/1b physical uplink control channel resources allocated to UE 10, and corresponds to a number of ACK/NACK packets.
    [0020]
    20. Method characterized by comprising: - obtaining in a user equipment an allocation of a single uplink control physical channel resource in format 1 a/1 b, where uplink control physical channel resources are reserved with a granularity of a negative acknowledgment/acknowledgement (ACK/NACK) packet; - perform ACK/NACK bundling on all spatial codewords, where one ACK/NACK bit bundled per received component/subframe carrier is generated and - select a constellation point for uplink transmission based on a value of a packed ACK/NACK bit, and a value of a downlink assignment index of a last physical downlink control channel received within an ACK/NACK packet.
    [0021]
    The method of claim 20, characterized in that the ACK/NACK packet comprises a set of time division duplex subframe(s) and carrier(s) component(s) which is configured to form an ACK feedback subset t /NACK to be sent by the user equipment on the uplink as a response to data received on the downlink. *
    [0022]
    22. Method, characterized in that it comprises: - obtaining in a user equipment an allocation of a plurality of uplink physical control channel resources of format 1a/1b, where the uplink physical control channel resources are reserved with a granularity of a negative acknowledgment/acknowledgement (ACK/NACK) packet; and - selecting one of a plurality of physical uplink control channel resources in 1a/1b format to send a packed ACK/NACK result based on a value of a downlink assignment index of a last physical channel of downlink control received within an ACK/NACK packet.
    [0023]
    A method according to claim 22, characterized in that an uplink physical control channel resource in format 1 a/1 b (n mod M) is used to transmit the packetized ACK/NACK result, where n is the downlink assignment index value of the last received physical downlink control channel, and M is a total number of allocated resources of the format 1a/1b physical uplink control channel to the user equipment.
    [0024]
    A method according to claim 22 or claim 23, characterized in that the ACK/NACK packet comprises a set of time division duplex subframe(s) and carrier(s) component(s) which is configured to form a feedback subset of ACK I NACK to be sent by the user equipment on the uplink as a response to data received on the downlink.
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    同族专利:
    公开号 | 公开日
    RU2013103462A|2014-07-27|
    US10182420B2|2019-01-15|
    CA2802921A1|2011-12-22|
    TW201215067A|2012-04-01|
    US20130182619A1|2013-07-18|
    KR20130031892A|2013-03-29|
    AU2010355630B9|2015-08-13|
    EP2583395A1|2013-04-24|
    CA2802921C|2017-08-22|
    AU2010355630B2|2015-04-09|
    WO2011156967A9|2013-05-10|
    EP2583395A4|2018-06-27|
    KR20160065223A|2016-06-08|
    AU2010355630A1|2012-12-20|
    JP2013534749A|2013-09-05|
    SG186387A1|2013-01-30|
    WO2011156967A8|2012-03-29|
    BR112012032414A2|2016-11-08|
    MX2012014871A|2013-02-15|
    CN102971978A|2013-03-13|
    RU2546191C2|2015-04-10|
    WO2011156967A1|2011-12-22|
    TWI527418B|2016-03-21|
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    法律状态:
    2018-02-27| B25D| Requested change of name of applicant approved|Owner name: NOKIA SOLUTIONS AND NETWORKS OY (FI) |
    2019-01-15| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-12-17| B15K| Others concerning applications: alteration of classification|Free format text: A CLASSIFICACAO ANTERIOR ERA: H04J 3/00 Ipc: H04L 1/16 (1968.09), H04L 1/18 (1968.09), H04L 5/0 |
    2019-12-24| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-02-02| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-04-20| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 20/04/2021, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    PCT/CN2010/074059|WO2011156967A1|2010-06-18|2010-06-18|Enhanced physical uplink control channel format resource allocation for time division duplex mode|
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