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    • 专利摘要:
    method and apparatus for multiplexing control and data in wireless communication a method of wireless communication includes determining a number of symbols for uci in each of a plurality of layers, multiplexing symbols for uci with data in multiple layers so that the symbols are time-aligned across the layers, and sending multiplexed symbols across the multiple layers uplink. in some designs, the number of symbols for the uci can be determined based on a spectral feature parameter.
    公开号:BR112012028009B1
    申请号:R112012028009-0
    申请日:2011-05-03
    公开日:2022-01-11
    发明作者:Xiliang Luo；Tao Luo；Hao Xu；Wanshi Chen；Xiaoxia Zhang；Peter Gaal；Juan Montojo
    申请人:Qualcomm Incorporated；
    IPC主号:
    专利说明:

    Cross-Reference to Related Orders
    [0001] This application claims the priority benefits of the US provisional patent application. No. 61/330,852, titled “METHOD AND APPARATUS FOR MULTIPLEXING CONTROL INFORMATION AND DATA IN A WIRELESS COMMUNICATION SYSTEM”, filed on May 3, 2010 and provisional relative US application No. 61/374,169, titled “METHOD AND APPARATUS FOR CALCULATING NUMBER OF CODED MODULATION SYMBOLS IN A WIRELESS TRANSMISSION” filed August 16, 2010, each of which is incorporated herein by reference in their entirety. background Field
    [0002] The following description generally refers to wireless communications and, more particularly, to the transmission of uplink control information multiplexed with data in multiple layers in wireless communication. Relevant Background
    [0003] Wireless communication systems are widely developed to provide various types of communication content such as voice, data, and so on. These systems may be multiple access systems capable of supporting communication with multiple users by sharing available system resources (eg, bandwidth and transmission power). Examples of such multiple access systems include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, Long Term Evolution systems 3GPP (LTE), and orthogonal frequency division multiple access (OFDMA) systems.
    [0004] Generally, a wireless multiple access communication system can simultaneously support communication to multiple wireless terminals. Each terminal communicates with one or more base stations through forward and reverse link transmissions. The forward link (or downlink) refers to the communication link from the base stations to the terminals and the reverse link (or uplink) refers to the communication link from the terminals to the base station. The communication link can be established through a single-input, single-output, single-in, multiple-out, and multiple-in, multiple-output (MIMO) system.
    [0005] A wireless communication system may include multiple base stations that can support communication to multiple user equipment (UE). A base station may include multiple transmitting and/or receiving antennas. Each UE may include multiple transmit and/or receive antennas. UEs may transmit uplink control information (UCI) on a physical uplink control channel (PUCCH). However, if the UCI needs to be powered back when there is a simultaneous physical uplink shared channel (PUSCH) transmission, and there is only a single uplink layer, the UCI can be multiplexed with data and sent on the PUSCH in order to to maintain the uplink single-carrier waveform.
    [0006] A MIMO system employs multiple transmit antennas (NT) and multiple receive antennas (NR) for data transmission. A MIMO channel formed by NT transmit antennas and NR receive antennas can be decomposed into NS independent channels which are also referred to as spatial channels where NS < min {NT, NR}. Each of the NS independent channels corresponds to a dimension. The MIMO system can provide improved performance (eg, greater throughput and/or greater reliability) if additional dimensions created by multiple transmit and receive antennas are utilized. For example, multiple spatial layers can distribute multiple data sequences at an appropriate frequency and time resource. The sequences can be transmitted independently on separate antennas. Thus, in order to benefit from the improved performance of a MIMO system, there may be a need to multiplex UCI with data in PUSCH where there are many spatial layers for uplink. summary
    [0007] The following is a simplified summary of one or more modalities in order to provide a basic understanding of such techniques and modalities. This summary is not an extensive overview of all modalities contemplated, and is not intended to identify key or critical elements of all modalities or to outline the scope of each and every modality. Its only purpose is to present some concepts of one or more modalities in a simplified form as an introduction to the more detailed description that will be presented later.
    [0008] In one aspect, a wireless communication method includes determining a UCI, determining a number of symbols for the UCI in each of the plurality of layers based on a spectral resource parameter, multiplexing symbols for the UCI with data on each of the plurality of layers so that the symbols for the UCI are time aligned through each of the plurality of layers, and sending the multiplexed symbols to the UCI with the data on the plurality of uplink layers .
    [0009] In another aspect, an apparatus for wireless communication includes mechanisms for determining the UCI, mechanisms for determining the number of symbols for the UCI in each of a plurality of layers based on a spectral resource parameter, mechanisms for multiplexing symbols for the UCI with data in each of the plurality of layers so that the symbols for the UCI are time-aligned across each of the plurality of layers, and mechanisms for sending the multiplexed symbols to the UCI with the data in the plurality of uplink layers.
    [0010] In another aspect, an apparatus for wireless communication including at least one processor is described. The at least one processor is configured to determine the UCI, to determine a number of symbols for the UCI in each of a plurality of layers based on a spectral resource parameter, to multiplex the symbols for the UCI with data in each one among the plurality of layers so that the symbols for the UCI are time aligned across each of the plurality of uplink layers. The apparatus additionally includes a memory coupled to at least one processor.
    [0011] In another aspect, a computer program product comprising a non-transient computer-readable medium storing computer-executable instructions is described. Instructions include instructions for having at least one computer determine the UCI instructions for having at least one computer determine a number of symbols for the UCI in each of a plurality of layers based on a spectral resource parameter, instructions for causing at least one computer to multiplex the symbols for the UCI with data in each of the plurality of layers so that the symbols for the UCI are time-aligned across each of the plurality of layers, and instructions for doing so having at least one computer send the multiplexed symbols to the UCI with the data in the plurality of uplink layers.
    [0012] In another aspect, a method for wireless communication includes receiving a transmission comprising a number of UCI-encoded modulation symbols multiplexed with data and sent on a plurality of uplink layers by a UE so that the modulation symbols encoded for UCI are time aligned through each of the plurality of layers and the number of modulation symbols encoded in each of the plurality of layers is based on a spectral resource parameter, and processing the received transmission to retrieve the UCI and data sent by the UE.
    [0013] In another aspect, an apparatus for wireless communication includes mechanisms for receiving a transmission comprising several modulation symbols encoded for UCI multiplexed with data and sent on a plurality of uplink layers by a UE, where the modulation symbols coded for the UCI are time aligned through each of the plurality of layers and the number of modulation symbols encoded in each of the plurality of layers is based on a spectral resource parameter, and mechanisms for processing the received transmission to retrieve the UCI and data sent by the UE.
    [0014] In another aspect, an apparatus for wireless communication including at least one processor is described. The at least one processor is configured to receive a transmission comprising several modulation symbols encoded for the UCI multiplexed with data and sent on a plurality of uplink layers by a UE, where the modulation symbols encoded for UCI are time aligned across of each of the plurality of layers and the number of modulation symbols encoded in each of the plurality of layers is based on a spectral resource parameter, and to process the received transmission to retrieve the UCI and data sent by the UE.
    [0015] In another aspect, a computer program product includes a non-transient computer-readable medium storing computer-executable instructions and is described. The instructions include instructions for causing at least one computer to receive a transmission comprising a number of modulation symbols encoded for the UCI multiplexed with data and sent on a plurality of uplink layers by a UE, where the modulation symbols encoded for the UCI are time-aligned across each of the plurality of layers, and the number of modulation symbols encoded in each of the plurality of layers is based on a spectral resource parameter, and instructions for making at least one computer process the received transmission to retrieve the UCI and data sent by the UE.
    [0016] In order to carry out the above and related purposes, one or more aspects include the features hereinafter described and particularly highlighted in the claims. The following description and the accompanying drawings present certain illustrative aspects in detail and are indicative of only a few of the many ways in which the principles of the aspects may be employed. Other advantages and novelty features will become apparent from the following detailed description when considered in conjunction with the drawings and the described aspects shall include all said aspects and their equivalences. Brief Description of Drawings
    [0017] The features, nature and advantages of the present description will become more apparent from the detailed description presented below when taken into consideration in conjunction with drawings in which similar reference characters identify corresponding parts throughout all views and where:
    [0018] Figure 1 illustrates a multiple access wireless communication system according to an embodiment;
    [0019] Figure 2 illustrates a block diagram of a communication system;
    [0020] Figure 3 illustrates an illustrative frame structure for transmission in a wireless communication system;
    [0021] Figure 4 illustrates illustrative subframe formats for downlink in a wireless communication system;
    [0022] Figure 5 illustrates illustrative subframe formats for uplink in a wireless communication system;
    [0023] Figure 6 illustrates illustrative control and data multiplexing across multiple layers in a wireless communication system;
    [0024] Figure 7 is a flowchart representation of a process for wireless communication;
    [0025] Figure 8 is a representation in block diagram form of a part of a wireless communication apparatus;
    [0026] Figure 9 is a representation in the form of a flowchart of a process for wireless communication;
    [0027] Figure 10 is a representation in block diagram form of a part of a wireless communication apparatus;
    [0028] Figure 11 is a representation in block diagram form of an illustrative transmission timeline in a wireless communication system;
    [0029] Figure 13 is a representation in the form of a flowchart of a process for wireless communication;
    [0030] Figure 14 is an illustration of an illustrative coupling of electrical components that facilitates multiplexing of control and data across multiple layers according to one embodiment. Description
    [0031] Various aspects are now described with reference to the drawings. In the following description, for the purpose of explanation, numerous specific details are presented in order to provide a deep understanding of one or more aspects. It may be evident, however, that the various aspects can be practiced without these specific details. In other cases, well-known structures and devices are illustrated in block diagram form in order to facilitate the description of these aspects.
    [0032] The techniques described here can be used for various wireless communication networks such as CDMA, TDMA, FDMA, OFDMA, single-carrier FDMA (SC-FDMA) networks, etc. The terms “networks” and “systems” are often used interchangeably. A CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes Broadband CDMA (W-CDMA), and Low Chip Rate (LCR). cdma2000 covers IS-2000, IS-95 and IS-856 standards. A TDMA network may implement a radio technology such as Global System for Mobile Communications (GSM). An OFDMA network can implement a radio technology such as Evolved UTRA (E-UTRA), IEEE 802.11, IEEE 802.16, IEEE 802.20, Flash-OFDM®, etc. UTRA, E-UTRA, and GSM are part of the Universal Mobile Telecommunications System (UMTS), LTE is a future version of UMTS that uses E-UTRA. UTRA, E-UTRA, GSM, UMTS and LTE are described in documents from an organization called “Project 3rd Partnership. Generation” (3GPP).
    [0033] SC-FDMA uses single carrier modulation and frequency domain equalization. The SC-FDMA signal has a lower peak-to-average power ratio (PAPR) due to its inherent single-carrier structure. SC-FDMA has attracted a lot of attention, especially in uplink communications where a lower PAPR greatly benefits the mobile terminal in terms of transmit power efficiency. It is currently used for uplink multiple access scheme in LTE.
    [0034] It should be noted that, for the sake of clarity, the present subject matter is discussed below with respect to specific examples of certain signals and message formats used without LTE. However, the applicability of the described techniques to other communication systems and other transmission/reception technology will be appreciated by those skilled in the art.
    [0035] Figure 1 illustrates a wireless communication system 100 which may be an LTE system or some other system. System 100 may include multiple evolved Node Bs (eNBs) 110 and other network entities. An eNB can be an entity that communicates with UEs and can also be referred to as a base station, a Node B, an access point, etc. Each eNB 110 can provide communication coverage for a particular geographic area and can support communication for UEs located within the coverage area. To optimize capacity, the overall coverage area of an eNB can be divided into multiple (eg, three) smaller areas. Each smaller area can be served by a respective eNB subsystem. In 3GPP, the term “cell” can refer to the smallest coverage area of an eNB 110 and/or an eNB subsystem serving that coverage area.
    [0036] The UEs 120 can be distributed throughout the system and each UE 120 can be stationary or mobile. A UE may also be referred to as a mobile station, a terminal, an access terminal, a subscriber unit, a station, etc. A UE 120 can be a cell phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a wireless phone, a wireless local circuit station ( WLL), a smart phone, a netbook, a smartbook, a tablet, etc.
    [0037] LTE uses OFDM in downlink and SC-FDM in uplink. OFDM and SC-FDMA divide a frequency band into multiple (Ks) orthogonal subcarriers, which are also commonly referred to as tones, bands, etc. Each subcarrier can be modulated with data. In general, modulation symbols are sent in the frequency domain with OFDM and in the time domain with SC-FDMA. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers (Ks) can be bandwidth dependent. For example, Ks can equal 128, 256, 512, 1024, or 2048 for system bandwidth of 1.4, 3, 5, 10, or 20 Megahertz (MHz), respectively. System bandwidth may correspond to a subset of Ks total subcarriers.
    [0038] Figure 2 illustrates a block diagram of an illustrative base station/eNB 110 and a UE 120, which may be one of the eNBs and one of the UEs in Figure 1. A UE 120 may be equipped with T antennas 1234a to 1234t, and base station 110 can be equipped with R antennas 1252a to 1252r, where in general T > 1 and R > 1.
    [0039] At UE 120, a transmission processor 1220 may receive data from a data source 1212 and control information from a controller/processor 1240. The transmission processor 1220 may process (e.g., encode, interleave, and symbol-map ) the data and control information and can provide data symbols and control symbols, respectively. Transmission processor 1220 may also generate one or more demodulation reference signals for multiple contiguous clusters based on one or more RS sequences assigned to UE 120 and may provide reference symbols. A MIMO TX processor 1230 may perform spatial processing (e.g., precoding) on the data symbols, control symbols, and/or reference symbols from the transmission processor 1220, if applicable, and may provide T output to T modulators (MODs) 1232a to 1232t. Each modulator 1232 may process a respective output symbol sequence (e.g., for SC-FDMA, OFDM, etc.) to obtain an output sample sequence. Each modulator 1232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample sequence to obtain an uplink signal. T uplink signals from modulators 1232a to 1232t can be transmitted via T antennas 1234a to 1234t, respectively.
    [0040] At base station 110, antennas 1252a to 1252r can receive uplink signals from UE 120 and provide received signals to demodulators (DEMODs) 1254a to 1254r, respectively. Each demodulator 1254 may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain received samples. Each demodulator 1254 may further process received samples to obtain received symbols. A MIMO channel/detector processor 1256 can obtain symbols received from all R demodulators 1254a to 1254r. Channel processor 1256 may derive a channel estimate for a wireless channel from UE 120 to base station 110 based on demodulation reference signals received from UE 120. MIMO detector 1256 may perform MIMO detection/demodulation on received symbols. based on channel estimation and can provide detected symbols. A receiving processor 1258 may process (e.g., symbol-map, de-interleave, and decode) the sensed symbols, provide decoded data to a data store 1260, and provide decoded control information to a controller/processor 1280.
    [0041] Downlink, at base station 110, data from a data source 1262 and control information from controller/processor 1280 may be processed by a transmission processor 1264, pre-encoded by a MIMO TX 1266 processor if applicable , conditioned by modulators 1254a to 1254r, and transmitted to UE 120. At UE 120, downlink signals from base station 110 may be received by antennas 1234, conditioned by demodulators 1232, processed by a channel estimator/MIMO detector 1236 , and further processed by a receiving processor 1238 to obtain data and control information sent to the UE 120. Processor 1238 may provide decoded data to a data store 1239 and the decoded control information to the controller/processor 1240.
    [0042] Controllers/processors 1240 and 1280 can direct operation at UE 120 and base station 10, respectively. Processor 1220, processor 1240 and/or other processors and modules in UE 120 may perform or direct process 700 in Fig. 7, process 1200 in Fig. 12 and/or other processes for techniques described herein. Processor 1256, processor 1280, and/or other processors and modules in base station 110 may perform or direct process 900 in Figure 9, and/or other processes for the techniques described herein. Memories 1242 and 1282 can store data and program codes for UE 120 and base station 110, respectively. A scheduler 1284 may schedule the UEs for downlink and/or uplink transmission and may provide resource allocations (e.g., assignment of multiple non-contiguous clusters, RS sequences for demodulation of reference signals, etc.) to the scheduled UEs. .
    [0043] Advances in digital communication have led to the use of multiple transmit antennas on the UE 120. For example, in LTE version 10, a single-user MIMO (SU-MIMO) mode is defined, where, a UE 120 can transmit up to two transport blocks (TBs) for the eNB 110. TBs are also sometimes called codewords (CWs), although sometimes the mapping from TBs to CWs can follow a swap, such as an exchange of two TBs mapped to a couple of CWs.
    [0044] Although simultaneous PUCCH and PUSCH transmission may be allowed when there are multiple uplink layers, it may still be desirable in some situations to multiplex the UCI with data in PUSCH when there are multiple uplink spatial layers.
    [0045] In MIMO UL LTE version 10 operation, when UCI messages are multiplexed into PUSCH of rank greater than 1, that is, more than one layer, the messages are duplicated across all layers of both codewords, and the Messages are time-domain multiplexed with data so that the UCI symbols are time-aligned across all layers, as discussed in Figure 6 below. The UCI may include one or more of a hybrid automatic request acknowledgment (HARQ-ACK) message, resource indicator (RI) message, channel quality indicator (CQI), precoding matrix indicator ( PMI), or generally any information related to uplink control. Although LTE version 10 allows simultaneous transmission of PUCCH and PUSCH, where UCI can be sent in PUCCH and in parallel data can be transmitted with PUSCH, it may be desirable in some situations to multiplex UCI with data in PUSCH in order to avoid transmissions. simultaneous PUCCH and PUSCH. For example, it may be desirable to multiplex UCI with data in PUSCH when there are multiple layers for uplink if the UE has limited power space, or if the requested UCI, such as CQI, is aperiodic. The number of encoded modulation symbols used for the UCI can be determined based on one or more spectral resource parameters, as discussed in Figures 11 to 13 below.
    [0046] Figure 3 illustrates an illustrative frame structure 300 for FDD in LTE. In other designs, a frame structure may include TDD over LTE. The transmission timeline for each of the downlink and uplink can be divided into units of radio frames. Each radio frame can have a predetermined duration (eg, 10 ms) and can be divided into 10 subframes with indices from 0 to 9. Each subframe can include two partitions. Each radio frame can thus include 20 partitions with indices from 0 to 19. Each partition can include L symbol periods, for example seven symbol periods for a normal cyclic prefix (as illustrated in figure 2) or six symbol periods symbol for an extended cyclic prefix. The 2L symbol periods in each subframe can be assigned indices from 0 to 2L-1.
    [0047] LTE uses OFDM in downlink and SC-FDM in uplink. OFDM and SC-FDM divide the system bandwidth into multiple orthogonal subcarriers (NFFT) which are also commonly referred to as tones, bands, etc. Each support can be modulated with data. In general, modulation symbols are transmitted in the frequency domain with OFDM and in the time domain with SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers (NFFT) can be bandwidth dependent. For example, NFFT can equal 128, 256, 512, 1024, or 2048 for the system bandwidth of 1.4, 3, 5, 10, or 20 MHz, respectively.
    [0048] The frequency and time resources available for each of the downlink and uplink can be divided into resource blocks. Each resource block can cover 12 subcarriers in a partition and can include multiple resource elements. Each resource element can cover a subcarrier in a symbol period and can be used to send a modulation symbol, which can be a real or complex value. In downlink, an OFDMA symbol may be transmitted in each symbol period of a subframe. On uplink, an SC-FDMA symbol may be transmitted in each symbol period of a subframe.
    [0049] Figure 4 illustrates two illustrative subframe formats 410 and 420 for downlink with the normal cyclic prefix. Subframe format 410 can be used for a base station equipped with two antennas. A cell-specific reference signal (CRS) can be transmitted from antennas 0 and 1 at symbol periods 0, 4, 7, and 11. A reference signal is a signal that is known in advance by a transmitter and a receiver. and may also be referred to as a pilot. A CRS is a reference signal that is specific to a cell, for example generated based on a cell identity (ID). In Figure 4, for a given resource element with label Ra, a modulation symbol can be transmitted on that resource element from antenna a, and no modulation symbol can be transmitted on that resource element from other antennas. Subframe format 420 can be used for a base station equipped with four antennas. A CRS may be transmitted from antennas 0 and 1 at symbol periods 0, 4, 7 and 11 and from antennas 2 and 3 at symbol periods 1 and 8. For both subframe formats 410 and 420, a CRS may be transmitted on evenly spaced subcarriers, which can be determined based on the cell ID. Different base stations may broadcast their CRSs on the same or different subcarriers, depending on their cell IDs. For both 410 and 420 subframe formats, resource elements not used for the CRS may be used to transmit data (e.g., traffic data, control data, and/or other data).
    [0050] For both 410 and 420 subframe formats, a subframe includes a control region followed by a data region. The control region may include the first Q symbol periods in the subframe, where Q may equal 1, 2, 3, or 4. Q may change from subframe to subframe and may be ported into the first symbol period of the subframe. The control region can carry control information. The data region may include the remaining 2L-Q symbol periods of the subframe and may carry data and/or other information for the UEs.
    [0051] A base station may transmit a Physical Control Format Indicator Channel (PCFICH), a Physical Hybrid ARQ Indicator Channel (PHICH), and a Physical Downlink Control Channel (PDCCH) in the control region of a subframe. PCFICH may be transmitted in the first symbol period of the subframe and may carry the size (Q) of the control region. PHICH can carry ACK and NACK information for data transmission sent by uplink UEs with HARQ. PDCCH can carry downlink control information (DCI) to the UEs. The base station may also transmit a PDSCH in the data region of a subframe. The PDSCH may carry unicast data for individual UEs, multicast data for groups of UEs, and/or broadcast data for all UEs.
    [0052] Figure 5 illustrates an illustrative format for uplink in LTE. The resource blocks available for uplink can be divided into a data region and a control region. The control region can be formed at two edges of the system bandwidth and can be of a configurable size. The data region can include all resource blocks not included in the control region. The drawing in Figure 5 results in the data region including contiguous subcarriers, which can allow a single UE to receive all contiguous subcarriers in the data region.
    [0053] A UE may receive resource blocks in the control region to transmit control information to a base station. The UE may also receive resource blocks in the data region to transmit traffic data to the base station. The UE may transmit control information on the PUCCH using designated resource blocks 510a and 510b in the control region. The UE may transmit traffic data only or both traffic data and control information on PUSCH using designated resource blocks 520a to 520b in the data region. An uplink transmission can span both partitions of a subframe and can be frequency hopped, as illustrated in Figure 5.
    [0054] Figure 6 illustrates illustrative control and data multiplexing across multiple layers in a wireless communication system. Figure 6 illustrates UCI multiplexing, such as CQI, ACK, or RI, with data mapped to multiple layers, i.e., layer 0 to 610 and camera 1 620 for a rank 2 PUSCH transmission. layers 610, 620 may represent the SC-FDM symbols, while the vertical axes of layers 610, 620 may represent the time-domain modulated symbols for each SC-FDM symbol. As illustrated in Figure 6 , the UCI can be mapped to all layers 610, 620 associated with all codewords, and the UCI mapped to each layer can be time domain aligned on each SC-FDM symbol. Alternatively or additionally, the UCI can be mapped to all layers associated with a subset of all codewords, where the subset excludes at least one of the codewords. Modulation symbols encoded for the UCI can be time division multiplexed with the data prior to discrete Fourier transform (DFT) precoding.
    [0055] The total number of coded symbols for UCI within each of the layers can be determined according to the total spectral efficiency of the MIMO channel. For example, for an R classification the SU-MIMO transmission, considering codeword 0 is selected with MCS:MCS and codeword 1 is programmed with modulation coding scheme (MCS):MCS , then the total number of symbols coded for UCI: Q' must be determined from the overall spectral efficiency: f(MCSa)■ R + f(MCS,)■ R , where R denotes the number of layers to which codeword 0 is mapped, R denotes the number of layers to which codeword 1 is mapped, and function f (■) reports the spectral efficiency of a particular MCS, such as R = R +R . The steps of determining the number of encoded symbols for UCI within each of the layers are discussed further in Figures 11 to 13 below.
    [0056] Figure 7 is a flowchart representation of a wireless communication methodology 700. In box 702, UCI is determined, such as CQI/PMI, HARQ-ACK, RI, or generally any control related information. uplink. At box 704, a number of symbols for the UCI in each of the multiple layers is determined. For example, the number of symbols for UCI can be based on a spectral resource parameter, such as a spectral efficiency of a MIMO channel between a UE and a base station, and/or an aggregated spectral efficiency across all layers, such as discussed earlier in Figures 11 to 13 below. At box 706, the symbols for UCI are multiplexed with data on each of the layers so that the symbols for UCI are time-aligned across each of the layers. The UCI can be mapped to all layers associated with all codewords, and the UCI mapped to each layer can be time-domain aligned on each SC-FDM symbol. For example, symbols for the UCI may be mapped to the same set of at least one symbol location in each of the layers in each symbol period, such as in each SC-FDM/OFDM symbol period. UCI encoded modulation symbols can also be time division multiplexed with the data prior to DFT precoding. For example, symbols for UCI can be time division multiplexed with modulation symbols for the data in each of the layers, and then DFT can be performed on the modulation symbols multiplexed for the UCI and data for each of the layers in each layer. symbol period, such as each SC-FDM/OFDM symbol period. At block 708, symbols multiplexed to the UCI with data in each of the layers can be transmitted uplink.
    [0057] Figure 8 is a representation in block diagram form of a part of a wireless communication apparatus 800. Module 802 is provided for UCI, such as CQI/PMI, HARQ-ACK, RI, or generally any information related to uplink control. Module 804 is provided for determining various symbols for the UCI in each of the multiple spatial layers. For example, the number of symbols for UCI can be based on a spectral resource parameter as discussed in Figures 11 to 13. Module 806 is provided for multiplexing symbols for the UCI with data in each of the layers so that the symbols for UCI to be time-aligned across each of the layers. Module 808 is provided for sending multiplexed symbols to the UCI with the data in the uplink layers. Communication apparatus 800, module 802 and module 804 can be further configured to implement other functions and features discussed here.
    [0058] Fig. 9 is a flowchart representation of a wireless communication methodology 900. At box 902, a transmission comprising several modulation symbols encoded for UCI multiplexed with data is received. For example, the data multiplexed UCI can be sent in multiple uplink layers by a UE, such as in all layers associated with all codewords, or in all layers associated with a subset of all codewords. The modulation symbols encoded for UCI can be time aligned across each of the layers, and the number of modulation symbols encoded in each of the layers can be based on a spectral resource parameter, such as a spectral efficiency of a channel. MIMO between the UE and a base station, and/or an aggregated spectral efficiency across all layers, as further discussed in Figures 11 to 13 below. At box 904, the received transmission is processed to retrieve the UCI and data sent by the UE. For example, an IDFT can be performed for the transmission received in each symbol period to obtain multiplexed modulation symbols for the UCI and data for each of the layers. The multiplexed modulation symbols can then be time division demultiplexed to obtain modulation symbols for UCI and modulation symbols for the data for each of the layers.
    [0059] Fig. 10 is a representation in block diagram form of a part of a wireless communication apparatus 1000. The module 1002 serves to receive a transmission comprising several modulation symbols encoded for UCI multiplexed with data. For example, the UCI multiplexed with data can be sent in multiple spatial layers or uplink by a UE. The modulation symbols encoded for UCI can be time aligned across each of the layers, and the number of modulation symbols encoded in each of the layers can be based on a spectral resource parameter. Module 1004 serves for processing the received transmission to retrieve the UCI and data sent by the UE.
    [0060] Figure 11 is a representation in block diagram form of an illustrative timeline of transmissions on a horizontal geometric axis 1100, representing time increasing linearly. As previously discussed, the number of UCI-encoded modulation symbols in each of the layers can be determined based on one or more spectral efficiency parameters. For example, the number of UCI symbols in each CW and each layer for HARQ-ACK/RI, in the case of a single beta value, can be determined as follows:
    Eq. (1) Table 1 lists the various parameters used in equation 1.


    [0061] In equation 1, the initial PUSCH transmission parameters can be used since the initial transmission spectral efficiency targets a fixed block error rate (BLER), which can result in obtaining a well-controlled BLER for information UCI after taking PUSCH into account displacement

    [0062] However, the accuracy of computing the number of coded modulation symbols Q' can be improved in certain situations. For example, when a UL grant of eNodeB 110 schedules new transmissions of two transport blocks simultaneously, the formula for computing the number of UCI symbols in each CW in each layer for HARQ-ACK or RI illustrated in equation 1 works accurately since two TBs have the same transmit bandwidth in their corresponding initial grants. However, as explained further below, it is possible that a UL grant may schedule two TBs whose initial grants are not synchronized, in which case the computation of Q' can be improved.
    [0063] For example, at time t1, transmissions 1102 and 1004 can be scheduled for transport blocks TB0 and TB1 using PDCCH. Without loss of generality, transmissions at time t1 are considered to occupy 10 resource blocks (RBs). In certain situations, at time t2, transmissions may be repeated (blocks 1106, 1108) due to channel changes. For example, PHICH can trigger a non-adaptive retransmission for both TB0 and TB1. For example, transmissions 1106, 1108 will also have 10 RBs as their initial bandwidth. However, the initial transmission bandwidth is different for two scheduled TBs 1110 and 1114 (e.g. 6 RBs for TB1 while still 10 RBs for TB2), when HARQ-ACK must be multiplexed with PUSCH at time t3.
    [0064] Alternatively, the bandwidth calculation of TB0 and TB1 at time t3 may differ if an SRS is being transmitted at time t1, so the number of SC-FDM data symbols available for the initial transmission of two TBs is different at time t3 (since a symbol is used for SRS at time t1). So the variable
    in the numerator of equation 1 can be different for an initial transmission and a retransmission of a transport block.
    [0065] That way, when the initial UL grants for the two TBs are not programmed at the same time, the guidance on how to choose the parameters
    and
    in equation 1 may be necessary.
    [0066] For example, the following modified formula can override equation (1) to determine the number of UCI symbols in each CW and each layer for HARQ-ACK/RI:

    [0067] In equation 2, M PUSCH-initial(x) represents the bandwidth programmed in the initial grant for TBx (x = 0.1), and
    represents a number of SC-FDMA symbols per subframe for initial PUSCH transmission to TBx.
    [0068] As can be seen, the denominator of equation 2 attempts to compute the aggregated spectral efficiency across all spatial layers from the individual initial grant for each of the programmed TBs.
    [0069] It can be appreciated that Equation 2 reverts to Equation 1 when both TBs are programmed for their initial transmission simultaneously.
    [0070] It can be further appreciated that equation 2 can be equivalently rewritten as:
    Eq. (3)
    Eq. (4).
    [0071] During operation, UEs 120 may occasionally lose receipt and use of UL grants. The eNB 110, therefore, may need to consider multiple possible reasons for retransmission, including a loss of grant by the UE 120, upon retransmission. estimating the number of encoded modulation symbols for HARQ-ACK or RI transmission. In order to reduce the number of hypotheses to be tested on the eNB 110 when taking into account the various possible situations for relaying to the UE 120, the following reduced computational complexity approaches can be performed: Table 2: Complexity Reduction Approaches

    represents a first and second spectral resource parameters that are calculated based on the initially scheduled transmissions of TB0 and TB1.
    [0072] Additionally, the number of modulation symbols encoded for CQI in each layer can be determined by:
    CQI information can be multiplexed into less than all the TBs used for data transmission. For example, the CQI can be multiplexed across all layers of one of the TBs used for data transmission. However, even in this case the system can guarantee that the UCI symbols are time-aligned across all layers on which the UCI symbols are mapped.
    [0073] Figure 12 is a flowchart 1200 of a wireless communication process. At box 1202, a first spectral resource parameter is computed based on an initially programmed spectral allocation for a first transport block. At box 1204, a second spectral resource parameter is computed based on an initially programmed spectral allocation for a second transport block. At box 1206, a number of symbols, such as encoded modulation symbols, for UCI in each of the layers is determined using the first and second spectral resource parameters, such as using equation 2 discussed above. The given number of encoded modulation symbols can be mapped to each of the layers. For example, if in operation 1206, the number of encoded modulation symbols is determined to be x, then x encoded modulation symbols can be mapped to each of the layers.
    [0074] Fig. 13 is a representation in block diagram form of a wireless communication apparatus comprising a module 1302 for computing a first resource parameter based on an initially programmed spectral allocation for a first transport block, a module 1304 for switching a second spectral resource parameter based on an initially programmed spectral allocation for a second transport block and a module 1306 for determining a number of symbols, such as encoded modulation symbols, for UCI in each of the multiple layers using the first and second spectral feature parameters, such as through the use of equation 2 as discussed above. The number of encoded modulation symbols can be mapped to each of the layers. For example, if module 1306 determines that there must be x UCI encoded modulation symbols, then x UCI encoded modulation symbols can be mapped to each of the layers.
    [0075] Referring next to Figure 14, a system 1400 is illustrated that facilitates multiplexing and data control across multiple layers in accordance with one embodiment. System 1400 includes function blocks that can represent functions implemented by a processor, software, or combination thereof (e.g., firmware), where system 1400 includes a logical grouping 1402 of electrical components that can act together. As illustrated, the logical grouping 1402 may include an electrical component for determining the UCI 1410, in addition to an electrical component for determining a number of symbols for the UCI in each of the multiple layers. For example, the number of symbols for the UCI can be based on a spectral resource parameter. Logical cluster 1402 may also include an electrical component for multiplexing the symbols for the UCI with data in each layer so that the symbols for the UCI are time aligned across each of the layers. Additionally, logical grouping 1402 may include an electrical component for transmitting the multiplexed symbols to the UCI with the data in the uplink layers. Additionally, system 1400 may include memory 1420 that holds instructions for performing functions associated with electrical components 1410, 1412, 1414, and 1416, where any of electrical components 1410, 1412, 1414, and 1416 may exist inside or outside. from memory 1420.
    [0076] It is understood that the specific order or hierarchy of steps in the processes described is an example of illustrative approaches. Based on design preferences, it is understood that the specific order or hierarchy of steps in the processes may be re-arranged while remaining within the scope of the present description. The attached method claims the present multi-step elements in an illustrative order and should not be limited to the specific order or hierarchy presented.
    [0077] Those skilled in the art will understand that information and signals can be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, particles or magnetic fields, particles or optical fields, or any combination thereof.
    [0078] The term “illustrative” is used here to mean serving as an example, case or illustration. Any aspect or design described herein as "illustrative" is not to be considered necessarily preferred or advantageous over other aspects or designs.
    [0079] Those skilled in the art will further appreciate that the various illustrative logic blocks, modules, circuits, and algorithm steps described in connection with the embodiments described herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the particular application and the design constraints imposed on the system as a whole. Those skilled in the art may implement the described functionality in various ways for each particular application, but such implementation decisions should not be construed as departing from the scope of the present description.
    [0080] The various illustrative logic blocks, modules, and circuits described with respect to the modalities described herein (e.g., identifiers, designators, transmitters, and allocators), can be interpreted or realized with a general purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate assembly (FPGA), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described here. A general purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors together with a DSP core, or any other similar configuration.
    [0081] In one or more illustrative modalities, the functions described can be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, functions can be stored in or enclosed as one or more instructions or code on a computer-readable medium. Computer readable media includes computer storage media. Storage media can be any available media that can be accessed by a computer. By way of example, and not limitation, such computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage, or other magnetic storage devices, or any other medium that can be used to port or store the desired program code in the form of instructions or data structures and can be accessed by a computer. Floppy disks and disks, as used herein, include compact disks (CD), laser disk, optical disk, digital versatile disk (DVD), diskette and blu-ray disk where diskettes normally reproduce the data magnetically while the disks reproduce the data optically with lasers. Combinations of the above must also be included within the scope of computer readable media.
    [0082] The foregoing description of the described embodiments is provided to enable any person skilled in the art to create or make use of the present description. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the description. Accordingly, the present description should not be limited to the modalities illustrated here, but the broadest scope consistent with the novelty principles and characteristics described here should be agreed upon.
    权利要求:
    Claims (6)
    [0001]
    1. Method (700) for wireless LTE communication, characterized in that it comprises: determining (702) uplink control information, UCI; determining (704) a number of symbols for the UCI in each of a plurality of layers based on a spectral efficiency, and wherein the plurality of layers are layers of a multi-input, multi-output, MIMO channel, and wherein determining the number of symbols for the UCI in each of the plurality of layers based on spectral efficiency includes: computing (1202) a first spectral efficiency based on an initially programmed spectral allocation for a first transport block TB, 0, the from the plurality of layers; computing (1204) a second spectral efficiency based on an initially programmed spectral allocation for a second transport block TB, 1, from the plurality of layers; and determining (1206) the number of symbols for the UCI in each of the plurality of layers using the first and second spectral efficiencies, where the use of the first and second spectral efficiencies is based on:
    [0002]
    2. Method according to claim 1, characterized in that the symbols for the UCI include coded modulation symbols.
    [0003]
    3. Apparatus (800) for wireless LTE communication, characterized in that it comprises: mechanisms (802) for determining uplink control information (UCI); mechanisms (804) for determining a number of symbols for the UCI in each of a plurality of layers based on a spectral efficiency, and wherein the plurality of layers are layers of a multi-input, multi-output channel, MIMO , and wherein the mechanisms for determining the number of symbols for the UCI in each of the plurality of layers based on spectral efficiency include: mechanisms for computing a first spectral efficiency based on an initially programmed spectral allocation for a first transport block TB, 0, from the plurality of layers; mechanisms for computing a second spectral efficiency based on an initially programmed spectral allocation to a second transport block TB, 1, from the plurality of layers; and mechanisms for determining the number of symbols for the UCI in each of the plurality of layers using the first and second spectral efficiencies, where the use of the first and second spectral efficiencies is based on:
    [0004]
    4. A method for wireless LTE communication, characterized in that it comprises: receiving a transmission including a number of modulation symbols encoded for uplink, UCI, control information multiplexed with data and sent on a plurality of uplink layers by a user equipment, UE, so that the modulation symbols encoded for the UCI are time aligned through each of the plurality of layers and the number of modulation symbols encoded in each of the plurality of layers is based on at a spectral efficiency that was determined by calculating a first spectral efficiency based on an initially programmed spectral allocation for a first transport block TB, 0, from the plurality of layers and by calculating a second spectral efficiency based on a initially scheduled spectral allocation for a second transport block TB, 1, from the plurality of beds and when determining the number of symbols for the UCI in each of the plurality of layers using the first and second spectral efficiencies, where the use of the first and second spectral efficiencies is based on:
    [0005]
    5. Apparatus for wireless LTE communication, characterized in that it comprises: mechanisms for receiving a transmission including a number of coded modulation symbols for uplink, UCI, control information multiplexed with data and sent in a plurality of layers in uplink by a user equipment, UE, so that the modulation symbols encoded for the UCI are time aligned through each of the plurality of layers and the number of modulation symbols encoded in each of the plurality of layers is based on a spectral efficiency that was determined by calculating a first spectral efficiency based on an initially programmed spectral allocation for a first transport block TB, 0, from the plurality of layers and by calculating a second spectral efficiency based on in an initially programmed spectral allocation for a second transport block TB, 1, from p layer plurality and when determining the number of symbols for the UCI in each of the plurality of layers using the first and second spectral efficiencies, where the use of the first and second spectral efficiencies is based on:
    [0006]
    6. Computer readable memory characterized in that it comprises instructions stored therein, the instructions being computer executable to carry out the method steps as defined in any one of claims 1, 2 or 4.
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    同族专利:
    公开号 | 公开日
    KR20130028117A|2013-03-18|
    EP2567494B1|2021-04-14|
    JP5559423B2|2014-07-23|
    US9100155B2|2015-08-04|
    US20110268080A1|2011-11-03|
    KR101477157B1|2014-12-29|
    EP2567494A1|2013-03-13|
    JP5869049B2|2016-02-24|
    TW201210277A|2012-03-01|
    WO2011140109A1|2011-11-10|
    TWI472199B|2015-02-01|
    JP2014209750A|2014-11-06|
    CN102870367B|2015-04-29|
    CN102870367A|2013-01-09|
    JP2013531407A|2013-08-01|
    BR112012028009A2|2018-05-22|
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    法律状态:
    2018-12-26| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-05-12| B15K| Others concerning applications: alteration of classification|Free format text: A CLASSIFICACAO ANTERIOR ERA: H04L 5/00 Ipc: H04L 5/00 (2006.01), H04B 7/0413 (2017.01), H04B 7 |
    2020-05-12| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-10-26| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2022-01-11| 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 03/05/2011, OBSERVADAS AS CONDICOES LEGAIS. PATENTE CONCEDIDA CONFORME ADI 5.529/DF, QUE DETERMINA A ALTERACAO DO PRAZO DE CONCESSAO. |
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