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    apparatus and method for providing harq feedback in a multi-carrier wireless communication system a method and apparatus provide hybrid automatic repeat (harq) request feedback corresponding to the state of multiple downlink carriers, with or without mimic being configured. here, by at least some configurations, with respect to the selection of harq feedback symbols, the downlink carriers are grouped into groups of one or two carriers, so that the harq feedback symbol codebooks that were previously applied in conventional hsdpa or dc-hsdpa systems can be used. that is, after encoding a data stream, the 15 harq feedback symbols, selected from a plurality of codebooks, configured for groups of one or two among the downlink carriers, are used to modulate an uplink channel. modulation, or channeling, can be performed with dual 20 channel codes or a single channel code, with a reduced - spreading factor, to insert two symbols into a single time slice.
    公开号:BR112012007686B1
    申请号:R112012007686-8
    申请日:2010-10-05
    公开日:2021-08-10
    发明作者:Sharad Deepak Sambhwan
    申请人:Qualcomm Incorporated；
    IPC主号:
    专利说明:

    Cross reference to related order(s)
    [001] This application claims the benefit of US Patent Application, No. 61/248,666, entitled "HS-DPCCH ACK/NACK DESIGN Codebook", filed October 5, 2009, which is expressly incorporated here by reference in its entirety. Field of Invention
    [002] Aspects of the present disclosure relate, generally, to wireless communication systems and, more particularly, to the provision of feedback information in a multi-carrier wireless communication system. Description of Prior Art
    [003] Wireless communication networks are widely employed to provide various communication services, such as telephony, video, data, messaging, broadcasts, and so on. Such networks, which are usually multiple access networks, support communications for multiple users by sharing available network resources. An example of such a network is the UMTS Terrestrial Radio Access Network (UTRAN). UTRAN is the radio access network (RAN) defined as part of the Universal Mobile Telecommunications System (UMTS), a third generation (3G) mobile telephony technology supported by the 3rd Generation Partnership Project (3GPP). UMTS, which is the successor to Global System for Mobile Communications (GSM) technologies, currently supports several air interface standards such as Broadband Code Division Multiple Access (W-CDMA), Time Division Multiple Access - Code Division (TD-CDMA) and Time Division Multiple Access - Synchronous Code Division (TD-SCDMA). UMTS also supports enhanced 3G data communications protocols, such as High Speed Packet Access (HSDPA), which provide high speeds and data transfer capabilities for associated UMTS networks.
    [004] As the demand for mobile broadband access continues to increase, research and development continues to advance UMTS technologies, not only to meet the growing demand for mobile broadband access, but to enhance the user experience with mobile communications . Invention Summary
    [005] A method and apparatus provide hybrid auto-repeat request feedback (HARQ) corresponding to the state of multiple downlink carriers, with or without MIMO being configured. Here, for at least some configurations, with respect to the selection of HARQ feedback symbols, the downlink carriers are grouped into groups of one or two carriers, so that the codebooks of HARQ feedback symbols that were previously applied in conventional HSDPA or DC-HSDPA systems can be used. That is, after encoding a data stream, HARQ feedback symbols, selected from a plurality of codebooks, configured for groups of one or two among the downlink carriers, are used to modulate an uplink channel. Modulation, or channeling, can be performed with dual channeling codes or a single channeling code, with a reduced spreading factor, to insert two symbols into a single time slice.
    [006] In one aspect, the disclosure provides a wireless communication method, which includes receiving downlink signaling on a plurality of downlink carriers and determining hybrid automatic repeat feedback (HARQ) corresponding to each of the plurality of carriers. A first HARQ feedback symbol is selected to encode HARQ feedback corresponding to a first subset among the plurality of carriers. Here, the first subset includes at least two of the plurality of carriers. A second HARQ feedback symbol is selected to encode HARQ feedback corresponding to a first subset among the plurality of carriers. Here, the second subset includes at least one of the plurality of carriers. The first and second HARQ feedback symbols are transmitted on an uplink.
    [007] Another aspect of the disclosure provides a wireless communication method, which includes providing a first feedback symbol corresponding to a state of decoding information received on a plurality of downlink carriers, and providing a second feedback symbol corresponding to a state of decoding information received on at least one downlink carrier.
    [008] Yet another aspect of the disclosure provides an apparatus, for wireless communication, that includes a receiver for receiving downlink signaling on a plurality of downlink carriers. A processor determines hybrid automatic repeat (HARQ) request feedback corresponding to each of the plurality of carriers, selects a first HARQ feedback symbol, to encode HARQ feedback corresponding to a first subset of the plurality of carriers, comprising at least two from among the plurality of carriers, and selects a second HARQ feedback symbol, to encode HARQ feedback corresponding to a second subset from the plurality of carriers, comprising at least one from the plurality of carriers. A transmitter transmits the first and second HARQ feedback symbols on an uplink.
    [009] Yet another aspect of the disclosure provides equipment for wireless communication that includes mechanisms for receiving downlink signaling on a plurality of downlink carriers, and mechanisms for determining automatic hybrid repeat request feedback (HARQ) corresponding to each one of the plurality of carriers. Additionally, the apparatus includes mechanisms for selecting a first HARQ feedback symbol, for encoding HARQ feedback corresponding to a first subset among the plurality of carriers, comprising at least two of the plurality of carriers, mechanisms for selecting a second HARQ feedback symbol, for encoding HARQ feedback corresponding to a second subset among the plurality of carriers, comprising at least one of the plurality of carriers, and mechanisms for transmitting the first and second HARQ feedback symbols on an uplink.
    [0010] Yet another aspect of the disclosure provides an apparatus for wireless communication that includes mechanisms for providing a first HARQ feedback symbol corresponding to a state of decoding information received on a plurality of downlink carriers, and mechanisms for providing a second feedback symbol corresponding to a state of decoding information received on at least one downlink carrier.
    [0011] Yet another aspect of the disclosure provides a computer program product, which includes a computer-readable medium having instructions for causing a computer to receive downlink signaling on a plurality of downlink carriers, to determine request feedback. hybrid automatic repetition (HARQ) corresponding to each of the plurality of carriers, to select a first HARQ feedback symbol, to encode HARQ feedback corresponding to a first subset among the plurality of carriers, comprising at least two of the plurality of carriers, to select a second HARQ feedback symbol, to encode HARQ feedback corresponding to a second subset from the plurality of carriers, comprising at least one from the plurality of carriers, and to transmit the first and second HARQ feedback symbols in an uplink.
    [0012] Yet another aspect of the disclosure provides equipment for wireless communication, which includes at least one processor and a memory coupled to the at least one processor. Here, the at least one processor is configured to receive downlink signaling on a plurality of downlink carriers, to determine hybrid automatic repeat (HARQ) request feedback corresponding to each of the plurality of carriers, to select a first symbol from HARQ feedback, to encode HARQ feedback corresponding to a first subset from the plurality of carriers, including at least two from the plurality of carriers, to select a second HARQ feedback symbol, to encode HARQ feedback corresponding to a second subset from the plurality of carriers, including at least one of the plurality of carriers, and to transmit the first and second HARQ feedback symbols on an uplink.
    [0013] These and other aspects of the invention will become fully understood upon review of the detailed description, which follows. Brief Description of Drawings
    [0014] Figure 1 is a diagram that illustrates an example of a hardware implementation for an equipment that employs a processing system;
    [0015] Figure 2 is a block diagram that conceptually illustrates an example of a telecommunications system.
    [0016] Figure 3 is a block diagram that conceptually illustrates the structure of the high-speed dedicated physical control channel (HS-DPCCH) uplink.
    [0017] Figure 4 is a block diagram that conceptually illustrates three exemplary channeling schemes to encode HARQ feedback for the HS-DPCCH.
    [0018] Figure 5 is a block diagram that conceptually illustrates three exemplary time slices within the HS-DPCCH, to carry HARQ feedback.
    [0019] Figures 6A and 6B are simplified schematic diagrams of a UE in communication with a Node B, in accordance with an exemplary aspect of the disclosure.
    [0020] Figure 7 is a pair of flow diagrams illustrating an exemplary process, in accordance with aspects of the disclosure.
    [0021] Figure 8 is a block diagram that conceptually illustrates an example of a Node B in communication with a UE in a telecommunications system. Detailed Description of the Invention
    [0022] The detailed description set forth below, in connection with the attached drawings, is intended as a description of various configurations, and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. However, it will be apparent to those skilled in the art that these concepts can be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form in order to avoid obscuring such concepts.
    [0023] Figure 1 is a conceptual diagram illustrating an example of a hardware implementation for an equipment 100, which employs a processing system 114. In this example, the processing system 114 can be implemented with a bus architecture, shown generally by bus 102. Bus 102 can include any number of interconnecting buses and bridges, depending on the specific application of processing system 114 and overall design constraints. Bus 102 connects together various circuits, including one or more processors, generally represented by processor 104, and computer readable media, generally represented by computer readable medium 106. Bus 102 may also link various other circuits, such as timing sources , peripherals, voltage regulators and power management circuits, which are well known in the art, and therefore no additional will be described. A bus interface 108 provides an interface between the bus 102 and a transceiver 110. The transceiver 110 provides mechanisms for communicating with various other equipment over a transmission medium. Depending on the nature of the equipment, a 112 user interface (eg numeric keypad, display, speaker, microphone, joystick) may also be provided.
    [0024] Processor 104 is responsible for managing bus 102 and general processing, including running software stored on computer-readable medium 106. The software, when executed by processor 104, causes processing system 114 to perform the various functions described above for any particular equipment. Computer readable medium 106 can also be used to store data that is manipulated by processor 104 when executing software.
    [0025] The various concepts presented throughout this disclosure can be implemented across a wide variety of telecommunications systems, network architectures and communication standards. By way of example and without limitation, aspects of the present disclosure illustrated in Figure 2 are presented with reference to a UMTS 200 system employing a W-CDMA air interface. A UMTS network includes three interaction domains: a Core Network (CN) 204, a UMTS Terrestrial Radio Access Network (UTRAN) 202, and User Equipment (UE) 210. In this example, the UTRAN 202 provides various wireless services, including video, telephony, data, messages, transmissions and/or other services. The UTRAN 202 may include a plurality of Radio Network Subsystems (RNSs), such as an RNS 207, each controlled by a respective Radio Network Controller (RNC), such as an RNC 206. Here, the UTRAN 202 may include any number of RNCs 206 and RNSs 207 in addition to the RNCs 206 and RNSs 207 illustrated here. The RNC 206 is an equipment responsible for, among other things, assigning, reconfiguring and releasing radio resources within the RNS 207. The RNC 206 can be interconnected to other RNCs (not shown) in the UTRAN 202 through various types of interfaces, such as such as a direct physical connection, a virtual network, or the like, using any suitable transport network.
    [0026] Communication between a UE 210 and a Node B 208 can be considered to include a physical layer (PHY) and a medium access control layer (MAC). Furthermore, communication between a UE 210 and an RNC 206, via a respective Node B 208, can be considered to include a radio resource control layer (RRC). In the immediate specification, the PHY layer can be considered as layer 1, the MAC layer can be considered as layer 2, and the RRC layer can be considered as layer 3. The information below uses terminology introduced in the Control Protocol Specification. Radio Resource (CRR), 3GPP TS 25.331 v9.1.0, incorporated herein by reference.
    [0027] The geographic region covered by the SRNS 207 can be divided into a number of cells, with a radio transceiver equipment serving each cell. A radio transceiver equipment is commonly referred to as a Node B, in UMTS applications, but may also be referred to by those skilled in the art as a base station (BS), a base transceiver station (BTS), a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), an access point (AP), or some other suitable terminology. For clarity, three Node B 208 are shown in each SRNS 207, however, SRNS 207 can include any number of wireless Node B. Node B 208 provides wireless access points to a core network (CN) 204 for any number of mobile devices. Examples of a mobile device include a cell phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a notebook, a netbook, a smartbook, a personal digital assistant (PDA), a satellite radio , a global positioning system (GPS) device, a multimedia device, a video device, a digital audio player (eg, MP3 player), a camera, a game console, or any similar functioning device. Mobile equipment is commonly referred to as user equipment (UE) in UMTS applications, but may also be referred to by those skilled in the art as a mobile station (MS), a subscriber station, a mobile unit, a mobile unit. subscriber, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal (AT), a mobile terminal, a wireless terminal, a remote terminal, a handset, a terminal, a user agent, a mobile client, a client, or some other suitable terminology. In a UMTS system, the UE 210 may further include a universal subscriber identity module (USIM) 211, which contains information about a user's subscription to a network. For illustrative purposes, a UE 210 is shown in communication with a number of NodeBs 208. The downlink (DL), also called a direct link, refers to the communication link from a Node B 208 to a UE 210, and the uplink (UL), also called reverse link, refers to the communication link from a UE 210 to a Node B 208.
    [0028] The core network 204 interacts with one or more access networks, such as the UTRAN 202. As shown, the core network 204 is a GSM core network. However, as those skilled in the art will recognize, the various concepts presented throughout this description can be implemented in a RAN, or other suitable access network, to provide UEs with access to core network types other than GSM networks.
    [0029] The core network 204 includes a circuit switched domain (CS) and a packet switched domain (PS). Some of the circuit-switched elements are a Mobile Services Switching Center (MSC), a Visitor Location Register (VLR) and a Gateway MSC. Packet-switched elements include a Server GPRS Support Node (SGSN) and a Gateway GPRS Support Node (GGSN). Some network elements, such as EIR, HLR, VLR, and AuC, can be shared by both circuit-switched and packet-switched domains. In the illustrated example, the core network 204 supports circuit-switched services with an MSC 212 and a GMSC 214. In some applications, the GMSC 214 may be referred to as a media port (MGW). One or more RNCs, such as the RNC 206, can be connected to the MSC 212. The MSC 212 is equipment that controls call setup, call routing and UE mobility functions. The MSC 212 also includes a Visitor Location Register (VLR), which contains subscriber related information, for the duration that a UE is in the coverage area of the MSC 212. The GMSC 214 offers a gateway through the MSC 212 to the UE , to access a circuit-switched network 216. The GMSC 214 includes a native location record (HLR) 215 that contains subscriber data, such as data reflecting the details of the services for which a particular user has subscribed. The HLR is also associated with an authentication center (AUC) that contains subscriber-specific authentication data. When a call is received by a particular UE, the GMSC 214 consults the HLR 215 to determine the location of the UE and routes the call to the particular MSC that serves that location.
    [0030] The core network 204 also supports packet data services with a server GPRS support node (SGSN) 218 and a gateway GPRS support node (GGSN) 220. GPRS, which stands for General Packet Radio Service, is designed to provide packet data services at speeds greater than those available with standard circuit-switched data services. The GGSN 220 provides a connection, to the UTRAN 202, to a packet-based network 222. The packet-based network 222 may be the Internet, a private data network, or some other suitable packet-based network. The primary function of the GGSN 220 is to provide the 210 UEs with packet-based network connectivity. Data packets can be transferred between the GGSN 220 and the UEs 210 via the SGSN 218, which mainly performs the same functions in the packet-based domain as the MSC 212 performs in the circuit switched domain.
    [0031] The UMTS air interface is a Direct Sequence Code Division Multiple Access (DS-CDMA) spread spectrum system. Spread-spectrum DS-CDMA spreads user data by multiplying it by a sequence of pseudo-random bits called chips. The W-CDMA air interface to UMTS is based on such direct sequence spread spectrum technology and additionally requires frequency division duplexing (FDD). FDD uses a different carrier frequency for the uplink (UL) and downlink (DL) between a Node B 208 and a UE 210. Another air interface for UMTS that uses DS-CDMA, and uses time division duplexing, is air interface TD-SCDMA. Those skilled in the art will recognize that while several examples described herein may refer to a WCDMA air interface, the underlying principles are equally applicable to a TD-SCDMA air interface.
    [0032] The HSPA configuration used in this example includes a series of improvements for the 3G/WCDMA air interface, facilitating higher throughput and lower latency. Among other modifications, from previous versions, HSPA uses hybrid auto-repeat request (HARQ), shared channel transmission, and adaptive modulation and encoding. The standards that define HSPA include HSDPA (High Speed Downlink Packet Access) and HSUPA (High Speed Uplink Packet Access).
    [0033] HSDPA uses as its transport channel the high-speed downlink shared channel (HS-DSCH). HS-DSCH is implemented by three physical channels: the high-speed physical downlink shared channel (HS-PDSCH), the high-speed shared control channel (HS-SCCH) and the high-speed dedicated physical control channel ( HS-DPCCH).
    [0034] Among these physical channels, HS-DPCCH can carry uplink feedback signaling related to downlink HS-DSCH transmissions and HS-SCCH orders. For example, Figure 3 illustrates the frame structure of the HS-DPCCH, in accordance with an exemplary aspect of the disclosure. Feedback signaling may include Hybrid ARQ Acknowledgment (HARQ-ACK) 302 and Quality Channel Indication (CQI) 304 and, in case the UE is configured in MIMO mode, Precoding Control Indication (PCI) 306 Each subframe (for example, which has a length of 2 ms (3 * 2560 chips)) can include 3 partitions, 308A, 308B and 308C, each 308 partition having a length of 2560 chips. The HARQ-ACK 302 can be carried in the first slot 308A of the HS-DPCCH subframe. The CQI 304 and, in case the UE is configured in MIMO mode, also the PCI 306 can be ported in the second and/or third slots, 308B and 308C, of the HS-DPCCH subframe.
    [0035] In a direct sequence code division multiple access (DS-CDMA) system, such as HSPA, data signals in both the uplink and downlink are each combined with a respective spreading code that has a certain chip rate, to separate a plurality of simultaneous transmissions from one another and enable recovery of the individual data signals. For example, on a given downlink carrier, a data stream, destined for a given user, can be spread by applying an appropriate spreading code. At the receiving end of the signal, the signal is unscrambled, and the data stream is recovered, by applying the appropriate spreading code. By using a plurality of spreading codes, multiple codes can be assigned to each subscriber, allowing multiple services to be delivered simultaneously. Similarly, on the uplink, multiple streams can be transmitted from a UE on the same channel by applying a plurality of channeling codes.
    [0036] In one aspect of the disclosure, an appropriate choice of a channeling code can allow the encoding of additional information into a data stream. For example, two forms of channeling code can be used on an HSDPA link: one for precoding control indication (PCI) and quality channel indication (MCQ), and one for HARQ ACK/NACK ( negative acknowledgment/confirmation) or DTX (discontinuous transmission) indicators.
    [0037] In particular, the channeling code corresponding to the HARQ feedback can use an adequate number of bits to encode the HARQ ACK/NACK/DTX state for each transport block in each one of the carriers in the downlink. In a conventional W-CDMA system, 10 bits of code are used for HARQ feedback, using a channeling code with a spreading factor (SF) of 256 chips per symbol.
    [0038] Systems using HSDPA can implement multiple carriers (3GPP uses the term "cell" to refer to a carrier), for example, 4C-HSDPA, for a 4-carrier system, or, more generally, MC-HSDPA, for multiple cells, where a plurality of HS-DSCH channels, over different carriers, can be used. That is, a UE can be programmed in an HS-DSCH serving cell, as well as in one or more secondary HS-DSCH serving cells, over parallel HS-DSCH transport channels from the same node B. those skilled in the art will understand that any one of the plurality of carriers can be configured to function as the HS-DSCH serving cell or the secondary HS-DSCH serving cell, for a particular UE. Here, data rates and system capacity can each be increased compared to systems using only a single carrier for the downlink.
    [0039] For MC-HSDPA systems, HARQ ACK/NACK feedback signaling can be sent separately for each downlink channel or together, as a composite HARQ ACK/NACK, corresponding to two or more downlink channels. For a system that encodes HARQ ACK/NACK according to the selection of channeling codes as described above, if HARQ ACK/NACK is sent separately for each downlink carrier, the UE can use plural channeling codes. When using plural channeling codes, each channeling code can be adapted to provide the HARQ ACK/NACK for a respective downlink carrier.
    [0040] However, a DC-HSDPA system can apply one or more channeling codes that can provide composite HARQ ACK/NACK information as feedback corresponding to a plurality of downlink carriers. Here, the channeling code can be selected from a codebook, where each code symbol corresponds to a composite HARQ ACK/NACK, i.e. an ACK/NACK corresponding to each of a plurality of carriers. downlink, all at once.
    [0041] HSPA+, or HSPA Evolved, is an evolution of the HSPA standard, which includes Multiple Inputs and Multiple Outputs (MIMO) and 64-QAM, allowing for higher throughput and better performance. That is, in one aspect of the disclosure, node B 208 and/or UE 210 (see Figure 2) may have multiple antennas that support MIMO technology. The use of MIMO technology allows node B 208 to explore the spatial domain to support spatial multiplexing, beam shaping, transmit diversity.
    [0042] MIMO is a term generally used to refer to multiple antenna technology, that is, multiple transmit antennas (multiple inputs to the channel) and multiple receive antennas (multiple outputs from the channel). MIMO systems generally improve data transmission performance by allowing diversity gains to reduce multipath fading and increase transmission quality and spatial multiplexing gains to increase data throughput.
    [0043] Spatial multiplexing can be used to transmit different data streams simultaneously on the same frequency. Data streams can be transmitted to a single UE 210 to increase the data rate, or to multiple UEs 210 to increase overall system capacity. This is achieved by spatially precoding each data stream and then transmitting each spatially precoded stream through a different transmit antenna on the downlink. The spatially pre-coded data streams arrive at the UE(s) 210 with different spatial signatures, which allows each of the UE(s) 210 to retrieve the one or more data streams destined for that UE 210. In the uplink, each UE 210 transmits a spatially precoded data stream, which allows node B 208 to identify the source of each spatially precoded data stream.
    [0044] Spatial multiplexing is generally used when channel conditions are good. When channel conditions are less favorable, beam shaping can be used to focus transmission energy in one or more directions. This can be achieved by spatially precoding the data for transmission over multiple antennas. To achieve good coverage at the cell edges, a single flux beam shaping transmission can be used in combination with transmission diversity.
    [0045] Generally, for MIMO systems that use n transmit antennas, n transport blocks can be transmitted simultaneously over the same carrier, using the same channeling code. Note that the different transport blocks, sent through the n transmission antennas, can have the same or different modulation and coding schemes, starting from one another.
    [0046] On the other hand, Single Input and Multiple Outputs (SIMO) generally refers to a system that uses a single transmit antenna (a single input to the channel) and multiple receive antennas (multiple outputs from the channel) . Thus, in a SIMO system, a single transport block is sent over the corresponding carrier. Using this terminology, a Single Input and Single Output (SISO) system is one that uses a single transmit and receive antenna.
    [0047] When MIMO is likely to be implemented across one or more of a plurality of carriers, HARQ-ACK feedback can become quite complicated. That is, the number of ACK/NACK guesses that the UE can use in order to respond to different scheduling scenarios involving SIMO and MIMO transmissions from node B can become very large. To illustrate, Table 1 lists HARQ-ACK hypotheses for a 3C-HSDPA Node B that schedules SIMO transmissions on two carriers and MIMO transmissions (including two transport blocks) on a third carrier (S/S/M). On each of the two SIMO carriers, the HARQ feedback can be an ACK, a NACK, or an indication that no signal was received on that carrier (called a discontinuous transmission, DTX). In the MIMO carrier, HARQ feedback can be an ACK, for one or both of the two transport blocks, depending on what was received, an ACK, for one transport block, and a NACK, for the other transport block, or a DTX, if no transport blocks are received. For this relatively simple system, with only one MIMO carrier out of three carriers, there are 44 HARQ guesses to cover all possible feedback, not including the conventional PRE/POST indication, which can add two more guesses to this number. TABLE 1


    [0048] Furthermore, a codebook, to encode HARQ feedback, can be even greater than the number of HARQ guesses for a given system. That is, in the example above, with two SIMO carriers and one MIMO carrier (abbreviated as S/S/M), the UE must have a ready response, not only for an S/S/M transmission, but also for transmissions of S/S/S, since the UE can only receive one of the transport blocks scheduled on the MIMO channel, without having received an indication that that channel was in fact a MIMO channel. For the example of an S/S/M system, the ACK/NACK/DTX codebook size includes 62 unique codewords, excluding PRE/POST.
    [0049] As can be seen from this description, the number of HARQ hypotheses grows rapidly as the number of carriers grows and when more among the carriers can have MIMO configured. In a 4C-HSDPA system with MIMO configured on all four carriers, a codebook with 2320 unique codewords, excluding PRE/POST, is required.
    [0050] Theoretically, the most ideal solution for providing HARQ feedback in an MC-HSDPA system would be to create a single codebook and co-encode the ACK/NACK feedback for all carriers. That is, according to an exemplary aspect of the disclosure, a single channeling code can be used in the HS-DPCCH, with the conventional spreading factor SF = 256, where a new codebook is designed to encode the HARQ feedback to each of the plurality of carriers.
    [0051] However, the code rate corresponding to the transmission of 4C-HSDPA codewords in a single channeling code is essentially one. That is, while there are generally 10 symbols per ACK/NACK partition, more than 10 bits are needed, for example, for the 2320 unique codewords needed for a 4C-HSDPA system with MIMO enabled.
    [0052] According to one aspect of the disclosure, from a practical standpoint, it makes sense to encode feedback together for groups of two carriers at a time. That is, substantial time and effort was spent on previous versions of 3GPP specifications to create efficient codebooks for up to two-carrier systems (ie, DC-HSDPA). In this way, existing codebooks already implemented in UE hardware can be reused to provide HARQ feedback in HSDPA systems with more than two carriers and MIMO.
    [0053] In one aspect of the disclosure, plural channeling codes may be used to provide HARQ feedback, wherein each channeling code is adapted to provide HARQ feedback for a group of one or two carriers. For example, in a 3C-HSDPA or 4C-HSDPA system, dual channeling codes can be used, where each channeling code provides HARQ feedback for a group of one or two downlink carriers.
    [0054] In another aspect of the disclosure, a single channeling code can be used, with a reduction of the SF scattering factor below the conventional SF = 256. Thus, when the SF scattering factor is less than 256, the number of symbols per ACK/NACK partition can be increased beyond 10, and thus a suitable codebook, to encode HARQ feedback for 4C-HSDPA+MIMO, is possible. In a further aspect, the spreading factor is defined as SF = 128. In this way, the number of symbols that the ACK/NACK time slice can carry is doubled to 20, thus allowing two HARQ-ACK codewords to be inserted on the ACK/NACK time partition. Here, each of the two HARQ-ACK codewords can correspond to a composite ACK/NACK, for a group of one or two downlink carriers, in a similar way as described above, in the case of using dual channel codes .
    [0055] In yet another aspect of the disclosure, the above aspects can be combined, for example, designing a codebook with a single channeling code and the conventional SF = 256 for one or more configurations (for example, 3 carriers, configured such as S/S/S, in one example), while using other aspects for other configurations (for example, using a scatter factor reduction to SF = 128, for 3-carrier or 4-carrier configurations, in all configurations other than S/S/S). Of course, other combinations of the above aspects can be combined within the scope of instant revelation.
    [0056] Figure 4 illustrates three schemes for implementing HARQ feedback, according to various aspects of the disclosure. Box A represents the legacy case that uses a single channeling code, with a spreading factor SF = 256; box B represents a case that uses a single channeling code, with a reduction spreading factor, for SF = 128; and box C represents a case using dual channeling codes, each having a scattering factor SF = 256.
    [0057] In each of the cases illustrated in Figure 4, k bits of information are fed into an encoder 402, which can encode the information, for example, using various routing error correction schemes or any other suitable encoding, as known by those skilled in the art. In box A, encoder 402A is configured to encode the k bits of input information to result in an output of n/2 bits of encoded information. The n/2 bits are then combined with a single channeling code, having a scattering factor of SF = 256, as in a legacy system. As discussed above, a codebook, from which the channeling code is selected for proper HARQ feedback, according to the HARQ scenario, can be implemented in such a way as to substantially optimize characteristics in the uplink transmission.
    [0058] In boxes B and C, the encoder 402B or 402C is configured to encode the k bits of input information, to result in an output of n bits of encoded information. Here, encoders 402B and 402C can be substantially the same encoder. In box B, a single channeling code, having a reduced spreading factor of less than 256, for example, SF = 128 can be used to encode HARQ feedback for the channel. In box C, after the n encoded information bits are split into two paths that can be destined for dual uplink carriers, dual channel codes that have a spreading factor SF = 256 can be used to encode HARQ feedback for the channel. As will be described in more detail below, the channeling to encode HARQ feedback in boxes B and C is quite similar, both allowing grouping of two downlink carriers into groups to allow the use of codebooks previously designed for conventional single-carrier systems or DC-HSDPA. That is, in box B, with a single channeling code and a scattering factor reduced to SF = 128, the HARQ feedback for a first group of downlink carriers can be placed in a first portion (eg half) of a time partition, and a second group of downlink carriers can be placed in a second portion (eg, half) of the time partition. Whereas, in box C, with dual channel codes, the HARQ feedback for each of a first and second group of downlink carriers can be placed in the same time slice, but separated according to code division multiplexing by through the dual channel codes. For example, dual channel codes can be substantially orthogonal to one another such that they can be resolved at a receiver.
    [0059] Figure 5 illustrates a HARQ-ACK 302 time slice, as illustrated in Figure 3, in further detail. In Figure 5, boxes A, B and C illustrate a time partition for a single channel code with SF = 256, for a single channel code with SF = 128, and for the dual channel codes with SF = 256, respectively. . That is, the AC boxes in Fig. 5 correspond to the AC-boxes in Fig. 4. Returning to Fig. 5, the time slot 302A in box A includes a field 302A1 in which a single channel code symbol can be included. . Here, as discussed above, a codebook, configured to provide a HARQ feedback for all of the downlink carriers, can be used, so that a single channel code symbol will suffice to provide feedback for all of the downlink carriers correspondents. In box B, time slice 302B includes two sequential fields 302B1 and 302B2. A respective channel code symbol can be inserted into each of the two fields 302B1 and 302B2. Here, as described above, the scattering factor can be reduced, for example, to SF = 128. Thus, a channeling code symbol, which has the same length as the legacy case, can be used within half a time slice. , instead of a full time partition. That is, a reduction in the SF scattering factor compresses information in time. When the SF spreading factor is reduced by a factor of two, the same piece of information that was previously sent in one time slice can now be sent in half a time slice. Thus, reducing the spread factor by two and grouping the downlink carriers into two-carrier groups allows two pre-existing codebooks, designed for two-carrier systems, to be used to provide HARQ feedback in a three-or system. four carriers, with the respective codes used in each half of the time slice.
    [0060] As a simple example, if a four-carrier 4C-HSDPA system is configured such that the first two carriers are set to SIMO, but the next two carriers are set to MIMO (ie S/S/ M/M), two of the carriers can be grouped into a first group (S/S), while the other two carriers can be grouped into a second group (M/M). Here, the previous 3GPP standards defined in Version 8, for DC-HSDPA, included a suitable codebook to provide HARQ feedback for two carriers configured as S/O. Thus, this codebook can be used to provide a channeling code symbol in the first half 302B1 of time slice 302B. Similarly, previous 3GPP standards defined in Version 9, for DC-HSDPA+MIMO, included a suitable codebook to provide HARQ feedback for two carriers configured as M/M. Thus, this codebook can be used to provide a channeling code symbol in the second half 302B2 of time slice 302B. Of course these examples of codebooks being reused from previous 3GPP standards are just exemplary in nature, and, in a particular implementation, other codebooks coming from different pre-existing standards, other standards, or even new books -code, to encode HARQ feedback for two downlink carriers, can be used.
    [0061] Box C illustrates an approach that uses dual channeling codes, with a spreading factor SF = 256. Here, the spreading factor is the same as described in box A, so that a channeling code symbol take the entire 302C time partition. However, dual channel codes are used, so that, as described above with respect to box B, the four downlink carriers in a 4C-HSDPA system can be grouped into two groups of two carriers each, and the channeling codes provide code division multiplexing of the HARQ feedback for each of two groups of two downlink carriers.
    [0062] In a system with an odd number of downlink carriers for which to provide feedback, such as a 3C-HSDPA system, each of the three approaches illustrated in Figure 5 can be used, however, one of the groups of carriers downlink will include only one downlink carrier. For example, in a 3-carrier system, configured for SISO on the first two downlink carriers and MIMO on the third downlink carrier (ie S/S/M), a first group may include the first two carriers (S/S ), while a second group may include the third carrier (M). Thus, HARQ feedback to the first group can use a channeling codebook, defined in DC-HSDPA Version 8, while HARQ feedback to the second group can use a channeling codebook, defined in DL-MIMO Version 7. Of course, as described above, these pre-existing codebooks from earlier versions of the 3GPP standards are only given as an illustrative example, and various aspects of the disclosure can utilize any other suitable codebooks.
    [0063] In further embodiments, HARQ feedback, for any number of downlink carriers, may be provided by using any number of codebooks that together encode the HARQ feedback for a corresponding number of groups of two downlink carriers.
    [0064] Figure 6A is a simplified schematic diagram illustrating a UE 602 in communication with a node B 604. Here, node B 604 transmits downlink signaling 606 on a plurality of downlink carriers, and the UE transmits HARQ feedback 608 on one or more uplink carriers. For example, downlink 606 signaling can include four downlink carriers in a 4C-HSDPA system, and HARQ 608 feedback can be provided in one uplink carrier. In other aspects of the disclosure, each of the 606 downlink signaling and the 608 HARQ feedback may be provided on any suitable number of carriers. Fig. 6B is a block diagram illustrating certain details of UE 602. In the illustrated example, UE 602 includes a processor 610 to perform functions such as determining HARQ feedback corresponding to each of the plurality of downlink carriers received in the signaling of downlink 606. Processor 610 is in communication with a transmitter 620, a receiver 630, and a memory 640. Receiver 630 may include one or more receive antennas 631, 632 for receiving downlink signaling 606, and transmitter 620 may include one or more transmit antennas 621, 622 to transmit HARQ feedback 608 on the uplink. Memory 640 may include any suitable form of data structures, such as a first codebook 641 and a second codebook 642, for storing HARQ feedback symbols corresponding to a state of decoding information received on a plurality of data carriers. downlink, such as an ACK, NACK, DTX or HARQ PRE/POST. That is, symbols stored in a codebook, such as the first codebook 641, can encode HARQ feedback for a subset among the plurality of downlink carriers. Here, the subset can include any number of downlink carriers, including from one downlink carrier to all downlink carriers. In an exemplary aspect of the disclosure, first codebook 641 may include HARQ feedback symbols to encode HARQ feedback corresponding to two downlink carriers, and second codebook 642 may include HARQ feedback symbols to encode HARQ feedback corresponding to one third downlink carrier. Of course, more than two codebooks can be stored in memory 640, and each of the codebooks can be configured to store encoded HARQ feedback symbols corresponding to HARQ feedback for essentially any number of downlink carriers.
    [0065] In another exemplary aspect of the disclosure, one of the codebooks stored in memory includes HARQ feedback symbols corresponding to HARQ feedback for three downlink carriers configured for SIMO transmission (S/S/S). In this aspect, when a UE 602 is configured to communicate over three SIMO downlink channels (S/S/S), a single codebook can encode HARQ feedback for all three carriers. When the UE 602 is configured to communicate over any other configuration (i.e., three carriers, with at least one carrier configured for MIMO, or four carriers, with zero or more carriers configured for MIMO), then codebooks to store HARQ feedback symbols, to encode HARQ feedback over some subsets of one or two carriers, can be accessed. That is, the changes to a legacy system needed to reduce the scatter factor or to use dual channeling codes may be larger than desired for a case like S/S/S where the book size -code is relatively small. Thus, a special exception can be made in such a case to co-code the HARQ feedback for all of the downlink carriers in a single codebook, and the feedback can be provided using a single channeling code, with a factor of SF spread = 256, similar to a conventional case.
    [0066] Figure 7 is a flowchart illustrating exemplary processes, 700 and 750, of wireless communication, according to an aspect of the disclosure, in which HARQ feedback corresponding to the state of plural downlink carriers is grouped into two or more groups , and at least one of the two or more groups includes two of the downlink carriers. In process 700, at block 702, downlink signaling is received on a plurality of downlink carriers. For example, according to two exemplary aspects of the disclosure, downlink signaling may be received on three or four downlink carriers, in a 3C-HSDPA or 4C-HSDPA system, respectively. In block 704, the HARQ feedback is determined corresponding to each of the plurality of downlink carriers. For example, processor 610 in Fig. 6B can determine whether information encoded in transport blocks on the corresponding downlink carrier is correctly decoded, or whether it has received nothing at the end. In block 706, based on the HARQ feedback determined in block 704, a first HARQ feedback symbol for encoding the HARQ feedback corresponding to a first subset of the plurality of carriers, including at least two of the plurality of carriers, is selected. Similarly, in block 710, a second HARQ feedback symbol for encoding the HARQ feedback corresponding to a second subset among the plurality of carriers, including at least one of the plurality of carriers, is selected. In an exemplary aspect of the disclosure, the second subset may include two downlink carriers, in a 4C-HSDPA system, or one carrier, in a 3C-HSDPA system. In block 712, the first and second HARQ feedback symbols are transmitted on an uplink. In some aspects of the disclosure, HARQ feedback symbols corresponding to the first subset may be encoded by modulating respective time slices in one or two uplink channels, as described above and illustrated in Figures 4 and 5.
    [0067] In process 750, in block 714, a first feedback symbol is provided, corresponding to a state of a decoding of information received on a plurality of downlink carriers (e.g., HARQ feedback). In block 716, a second feedback symbol is provided, corresponding to a state of a decoding of information received on at least one downlink carrier. For example, for a 4C-HSDPA system, the first feedback symbol may include HARQ feedback for a first and second downlink carrier, and the second feedback symbol may include HARQ feedback for a third and fourth downlink carrier. For a 3C-HSDPA system, the second symbol can only include HARQ feedback for the third downlink carrier.
    [0068] Figure 8 is a block diagram of a node B 810 in communication with a UE 850, where node B 810 may be node B 208 in figure 2 and UE 850 may be UE 210 in Figure 2. In downlink communication, a transmission processor 820 can receive data from a data source 812, and control signals from a controller/processor 840. The transmission processor 820 provides various data processing functions. signal for the control and data signals as well as reference signals (eg pilot signals). For example, the 820 transmission processor can provide cyclic redundancy (CRC) codes for error detection, encoding and interlacing to facilitate early error correction (FEC), mapping to signal constellations based on various modulation schemes (e.g. , binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-ary phase shift keying (M-PSK), quadrature M-ary amplitude modulation (M-QAM) and similar), scattering with orthogonal variable scattering factors (OVSF), and multiplying with scrambling codes, to produce a series of symbols. Channel estimates from an 844 channel processor may be used by a controller/processor 840 to determine the encoding, modulation, spreading, and/or scrambling schemes for the 820 transmission processor. These channel estimates may be derived from a reference signal, transmitted by UE 850, or from feedback from UE 850. Symbols generated by transmit processor 820 are provided to a transmit frame processor 830 to create a frame structure. Transmit frame processor 830 creates this frame structure by multiplexing the symbols with information from controller/processor 840, resulting in a series of frames. The frames are then delivered to a transmitter 832, which provides various signal conditioning functions, including amplifying, filtering, and modulating the frames to a carrier for downlink transmission over the wireless medium through antenna 834. Antenna 434 can include one or more antennas, for example, including adaptive bidirectional beam steering antenna arrays or other similar beam technologies.
    [0069] At UE 850, a receiver 854 receives the downlink transmission through an antenna 852 and processes the transmission to retrieve the modulated information for the carrier. Information retrieved by receiver 854 is provided to a receive frame processor 860, which analyzes each frame and provides information from the frames to an 894 channel processor, and data, control, and reference signals to an 870 receive processor. The receive processor 870 then performs the inverse of the processing performed by the transmit processor 820 at Node B 810. More specifically, the receive processor 870 unscrambles and unscrambles the symbols and then determines the constellation points of most likely signal transmitted by node B 810 based on the modulation scheme. These soft decisions can be based on channel estimates computed by the 894 channel processor. The soft decisions are then decoded and de-interlaced to retrieve the data, control, and reference signals. The CRC codes are then checked to determine if the frames were successfully decoded. The data carried by the successfully decoded frames will then be provided to a data store 872 representing applications running on UE 850 and/or various user interfaces (e.g., display). Control signals carried by successfully decoded frames will be provided to an 890 controller/processor. When frames are unsuccessfully decoded by the 870 receive processor, the 890 controller/processor may also use an acknowledgment (ACK) and/or acknowledgment protocol negative (NACK), to support retransmission requests for these frames.
    [0070] In the uplink, data from a data source 878 and control signals from the controller/processor 890 are provided to a transmission processor 880. The data source 878 can represent applications running on the UE 850 and various interfaces of user (eg keyboard). Similar to the functionality described in connection with downlink transmission by Node B 810, the 880 transmission processor provides various signal processing functions, including CRC codes, encoding and interlacing, to facilitate FEC, mapping to signal constellations, spreading with OVSFs and scattering, to produce a series of symbols. Channel estimates, derived by the 894 channel processor from a reference signal transmitted by Node B 810 or from feedback contained in the midamble transmitted by Node B 810, can be used to select the appropriate encoding, modulation, schemes, spreading and/or shuffling. The symbols produced by transmit processor 880 will be provided to transmit frame processor 882 to create a frame structure. The transmission frame processor 882 creates this frame structure by multiplexing the symbols with information from the controller/processor 890, resulting in a series of frames. The frames are then provided to a transmitter 856, which provides various signal conditioning functions, including amplifying, filtering, and modulating the frames to a carrier to transmit uplink over the wireless medium through antenna 852.
    [0071] The uplink transmission is processed at Node B 810 in a similar manner as described, in connection with the receive function at UE 850. A receiver 835 receives the uplink transmission through antenna 834 and processes the transmission to retrieve the modulated information for the carrier. Information retrieved by receiver 835 is provided to a receive frame processor 836, which analyzes each frame and provides information from the frames, to channel processor 844, and data, control and reference signals, to a receive processor. 838. The receiving processor 838 performs the inverse of the processing performed by the transmission processor 880 at the UE 850. The data and control signals carried by the successfully decoded frames can then be provided to a data store 839 and the controller/ processor, respectively. If some of the frames are unsuccessfully decoded by the receiving processor, controller/processor 840 may also use an acknowledgment (ACK) and/or negative acknowledgment (NACK) protocol to support retransmission requests for other frames.
    [0072] The controller/processor, 840 and 890, can be used to direct the operation at Node B 810 and UE 850, respectively. For example, the controller/processor, 840 and 890, can provide various functions including timing, peripheral interfaces, voltage regulation, power management and other control functions. The computer readable media of the memories, 842 and 892, can store data and software for the Node B 810 and the UE 850, respectively. A scheduler/processor 846, at NodeB 810, may be used to allocate resources to the UEs and schedule downlink and/or uplink transmissions to the UEs.
    [0073] In one configuration, the equipment 850 for wireless communication includes mechanisms for receiving downlink signaling on a plurality of downlink carriers and mechanisms for transmitting the first and second HARQ feedback symbols on an uplink. In one aspect, the mechanisms referred to above may be receiver 854, receive frame processor 860, and receive processor 870; and transmitter 856, broadcast frame processor 882, and broadcast processor 880, respectively. In addition, apparatus 850, in accordance with this configuration, includes mechanisms for determining hybrid automatic repeat (HARQ) request feedback corresponding to each of the plurality of carriers, mechanisms for selecting a first HARQ feedback symbol, to encode feedback HARQ corresponding to a first subset among the plurality of carriers, comprising at least two of the plurality of carriers, and mechanisms for selecting a second HARQ feedback symbol, to encode HARQ feedback corresponding to a second subset among the plurality of carriers, comprising at least least one among the plurality of carriers. In one aspect, the mechanisms referred to above may be the channel processor 894 and/or the controller/processor 890. In another aspect, the mechanisms referred to above may be a module or any equipment configured to perform the functions recited by the mechanisms referred to above.
    [0074] In another configuration, the equipment 850, for wireless communication, includes mechanisms for providing a first feedback symbol, corresponding to a state of decoding information, received on a plurality of downlink carriers, and mechanisms for providing a second feedback symbol, corresponding to a state of decoding information received on the at least one downlink carrier. In one aspect, the mechanisms referred to above may be the controller/processor 890, channel processor 894, transmit processor 880, transmit frame processor 882 and/or transmitter 856. In another aspect, the mechanisms referred to above may be a module or any equipment configured to perform the functions recited by the mechanisms referred to above.
    [0075] Various aspects of a telecommunications system have been presented with reference to a W-CDMA system. As those skilled in the art will readily appreciate, various aspects described throughout this disclosure can be extended to other telecommunication systems, network architectures and communication standards. That is, the modulation and multiple access scheme employed by an access network, in accordance with various aspects of the disclosure, may vary depending on the particular telecommunications standard being deployed. By way of example, the standard might include Optimized Evolution Data (EV-DO) or Ultramobile Broadband (UMB). EV-DO and UMB are air interface standards promulgated by the 3rd Generation Partnership Project 2 (3GPP2) as part of the CDMA2000 family of standards and employ CDMA to provide broadband Internet access to mobile stations. The standard may alternatively be Universal Terrestrial Radio Access (UTRA) which employs Broadband CDMA (W-CDMA) and other CDMA variants such as TD-SCDMA, Global System for Mobile Telecommunications (GSM) which employs TDMA and UTRA Evolved (E-UTRA), Ultramobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20 and Flash-OFDM that employ OFDMA. UTRA, E-UTRA, UMTS, LTE, Advanced LTE and GSM are described in documents from the 3GPP organization. CDMA2000 and UMB are described in documents from the 3GPP2 organization. The current wireless communication standard and multiple access technology employed will depend on the specific application and global design constraints imposed on the system.
    [0076] In accordance with various aspects of the disclosure, an element, or any part of an element, or any combination of elements, may be implemented with a "processing system" that includes one or more processors. Examples of processors include microprocessors, microcontrollers, digital signal processors (DSPs), field programmable gate arrays (FPGA), programmable logic devices (PLDs), state machines, gate logic, discrete hardware circuits, and other suitable configured hardware to perform the various features described throughout this disclosure. One or more processors in the processing system can run software. Software shall be broadly interpreted to mean instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables , execution chains, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise. The software may reside on a computer-readable medium. The computer-readable medium may be a non-transient computer-readable medium. A non-transient computer-readable medium includes, by way of example, a magnetic storage device (eg hard disk, floppy disk, magnetic card), an optical disk (eg compact disk (CD), digital versatile disk (DVD) )), a smart card, a flash memory device (eg card, stick, key drive), random access memory (RAM), read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM ), electrically erasable PROM (EEPROM), a registry, a removable disk, and any other suitable medium for storing software and/or instructions that can be accessed and read by a computer. The computer-readable medium may also include, by way of example, a carrier wave, a transmission line, and any other medium suitable for transmitting software and/or instructions that can be accessed and read by a computer. The computer-readable medium may be resident in the processing system, external to the processing system, or distributed across multiple entities, including the processing system. The computer-readable medium can be incorporated into a computer program product. By way of example, a computer program product can include a computer-readable medium in packaging materials. Those skilled in the art will recognize how best to implement the described functionality presented throughout this disclosure, depending on the particular application and overall design constraints imposed on the overall system.
    [0077] It should be understood that the specific order or hierarchy of steps in the disclosed methods is an illustration of exemplary processes. Based on project performances, it is understood that the specific hierarchy or order of steps in the methods can be rearranged. The accompanying method claims elements present, from the various steps, in a sample order, and is not intended to be limited to the specific order or hierarchy presented, unless specifically recited there.
    [0078] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown here, but the full scope is to be granted consistent with the language in the claims, in which reference to an element, in the singular, is not intended to mean "one and only one", unless specifically stated, but rather "one or more". Unless specifically stated otherwise, the term "some" refers to one or more. A phrase referring to "at least one of a list of items" refers to any combination of these items, including individual members. As an example, "at least one of: a, b, or c" is intended to encompass: a;b; c; a and b; a and c; bec; and a, b and c. All structural and functional equivalents for the elements of the various aspects described throughout this disclosure that are known, or later come to be known to those of ordinary skill in the art , are expressly incorporated herein by reference and are intended to be encompassed by the claims. Furthermore, nothing disclosed herein is intended to be dedicated to the public, regardless of the fact that such disclosure is explicitly recited in the claims. interpreted under the provisions of 35 USC § 112, sixth paragraph, unless the element is expressly recited using the phrase "mechanisms for", or, in the case of a method claim, the element is recited. ted using the phrase "step to".
    权利要求:
    Claims (7)
    [0001]
    1. A method for wireless communication, comprising: - providing (714) a first feedback symbol corresponding to a hybrid auto-repeat request acknowledgment feedback, HARQ, of the decoding information received on a plurality of downlink carriers to jointly encode hybrid auto-repeat request acknowledgment feedback for the plurality of carriers; and - providing (716) a second feedback symbol corresponding to a hybrid auto-repeat request confirmation feedback of the decoding information received on at least one downlink carrier to encode the hybrid auto-repeat request confirmation feedback for at least a carrier; the method characterized in that it further comprises: - receiving (702) downlink signaling on a plurality of downlink carriers; - determining (704) hybrid auto-repeat request confirmation feedback, HARQ, corresponding to each of the plurality of carriers; - selecting (706) a first HARQ feedback symbol to encode the HARQ confirmation feedback corresponding to a first subset of the plurality of carriers comprising at least two of the plurality of carriers, wherein the first HARQ feedback symbol is selected from a codebook among a plurality of codebooks; - selecting (710) a second HARQ feedback symbol to encode the HARQ confirmation feedback corresponding to a second subset of the plurality of carriers comprising at least one of the plurality of carriers, wherein the second HARQ feedback symbol is selected from a codebook among the plurality of codebooks; - transmitting the first and second feedback symbols on an uplink, wherein the transmission comprises modulating at least a first part of a time slice (302) of an uplink carrier with the first HARQ feedback symbol, and modulating a second part of the time slice (302) of the uplink carrier, different from the first portion of the time slice (302), with the second HARQ feedback symbol.
    [0002]
    2. Method according to claim 1, characterized in that the modulation of at least the first part of the time partition comprises: - substantially modulating the total time partition (302C1) of the uplink carrier with the first symbol of HARQ feedback; and - substantially modulate the total time partition (302C2) of the uplink carrier with the second HARQ feedback symbol.
    [0003]
    3. Method according to claim 2, characterized in that modulating the time slice (302) with the first HARQ feedback symbol and modulating the time slice (302) with the second HARQ feedback symbol, comprises, each use a spread factor of 256 chips per bit.
    [0004]
    4. Method according to claim 1, characterized in that it modulates the respective first and second parts of the uplink carrier, each one, comprises using a spreading factor smaller than 256 chips per bit.
    [0005]
    5. Method according to claim 4, characterized in that the scattering factor is 128.
    [0006]
    6. Equipment for wireless communication, comprising: - means for providing a first feedback symbol corresponding to a hybrid auto-repeat request acknowledgment feedback of the decoding information received on a plurality of downlink carriers to jointly encode the acknowledgment feedback hybrid auto-repeat request for the plurality of carriers; and - means for providing a second feedback symbol corresponding to a hybrid auto-repeat request confirmation feedback of the decoding information received on at least one downlink carrier for encoding the hybrid auto-repeat request confirmation feedback for at least one carrier; the equipment characterized in that it further comprises: - means for receiving downlink signaling on a plurality of downlink carriers; - means for determining hybrid auto-repeat request acknowledgment feedback, HARQ, corresponding to each of the plurality of carriers; - means for selecting a first HARQ feedback symbol to encode the HARQ confirmation feedback corresponding to a first subset of the plurality of carriers comprising at least two from the plurality of carriers, wherein the first HARQ feedback symbol is selected from a codebook among a plurality of codebooks; - means for selecting a second HARQ feedback symbol to encode the HARQ confirmation feedback corresponding to a second subset of the plurality of carriers comprising at least one of the plurality of carriers, wherein the second HARQ feedback symbol is selected from one codebook among the plurality of codebooks; - means for transmitting the first and second feedback symbols on an uplink, wherein the means for transmitting comprises means for modulating at least a first part of a time slice (302) of an uplink carrier with the first HARQ feedback symbol , and means for modulating a second time slice portion (302) of the uplink carrier, different from the first time slice portion (302), with the second HARQ feedback symbol.
    [0007]
    7. Computer-readable memory characterized by the fact that it has instructions stored in it that, when executed, cause a computer to perform the method as defined in any one of claims 1 to 5.
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    法律状态:
    2020-09-24| B15K| Others concerning applications: alteration of classification|Free format text: AS CLASSIFICACOES ANTERIORES ERAM: H04L 1/16 , H04L 1/18 , H04L 5/00 Ipc: H04L 1/18 (2006.01), H04L 5/00 (2006.01) |
    2020-09-24| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-06-08| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-08-10| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 05/10/2010, OBSERVADAS AS CONDICOES LEGAIS. PATENTE CONCEDIDA CONFORME ADI 5.529/DF, QUE DETERMINA A ALTERACAO DO PRAZO DE CONCESSAO. |
    优先权:
    申请号 | 申请日 | 专利标题
    US24866609P| true| 2009-10-05|2009-10-05|
    US61/248,666|2009-10-05|
    US12/897,460|2010-10-04|
    US12/897,460|US8767797B2|2009-10-05|2010-10-04|Apparatus and method for providing HARQ feedback in a multi-carrier wireless communication system|
    PCT/US2010/051535|WO2011044170A1|2009-10-05|2010-10-05|Apparatus and method for providing harq feedback in a multi-carrier wireless communication system|
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