WO2020063877A1 - 指示方法、信息确定方法、装置、基站、终端及存储介质 - Google Patents

指示方法、信息确定方法、装置、基站、终端及存储介质 Download PDF

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Publication number
WO2020063877A1
WO2020063877A1 PCT/CN2019/108575 CN2019108575W WO2020063877A1 WO 2020063877 A1 WO2020063877 A1 WO 2020063877A1 CN 2019108575 W CN2019108575 W CN 2019108575W WO 2020063877 A1 WO2020063877 A1 WO 2020063877A1
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Prior art keywords
precoding matrix
sri
elements
codebook
precoding
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PCT/CN2019/108575
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English (en)
French (fr)
Inventor
蒋创新
鲁照华
李儒岳
陈艺戬
吴昊
高波
王瑜新
张淑娟
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US17/280,391 priority Critical patent/US12034510B2/en
Priority to EP19864662.2A priority patent/EP3860021A4/en
Priority to CA3114463A priority patent/CA3114463C/en
Publication of WO2020063877A1 publication Critical patent/WO2020063877A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0478—Special codebook structures directed to feedback optimisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0689—Hybrid systems, i.e. switching and simultaneous transmission using different transmission schemes, at least one of them being a diversity transmission scheme
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0691—Hybrid systems, i.e. switching and simultaneous transmission using subgroups of transmit antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0226—Channel estimation using sounding signals sounding signals per se
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams

Definitions

  • the present disclosure relates to, but is not limited to, the field of communications, and in particular, to an indication method, information determination method, device, base station, terminal, and storage medium.
  • the uplink codebook based transmission (UL) solution of the NR supports a 2-antenna port and a 4-antenna port.
  • the base station will be configured to carry the precoding and layer number indications of the 2-antenna port in the DCI (Downlink Control Information), where the precoding
  • the sum layer indication is used to indicate TPMI (Transmit Precoding Matrix Indicator) and the number of layers transmitted. Since the two antenna ports may do coherent (coherent) transmission, the two antenna ports can be considered to be from the same panel.
  • the base station will be configured to carry the precoding and layer number indication of the 4 antenna ports in the DCI. Since the 4 antenna ports may do coherent transmission, these 4 antenna ports can be considered to be from the same A panel.
  • the precoding codebooks for the 2-antenna port and 4-antenna port are described in the protocol 38.211.
  • the uplink codebook-based transmission method can also be applied at high frequencies, but the use is limited to single analog beam transmission or antenna panel transmission. There is no solution on how to support multi-panel transmission, or to flexibly support the dynamic indication between single-panel transmission and multi-panel transmission.
  • Embodiments of the present disclosure provide an indication method, an information determination method, a device, a base station, a terminal, and a storage medium, and provide a solution that supports multi-panel transmission or flexibly supports dynamic indication between single-panel transmission and multi-panel transmission.
  • An embodiment of the present disclosure provides an indication method, including:
  • the basic information includes at least one of the following:
  • DMRS port indication information information of precoded codebook or precoding matrix, CSR (codebook subset restriction)
  • the determination of the basic information depends on the value of the SRI.
  • An embodiment of the present disclosure further provides a method for determining information, including:
  • the basic information includes at least one of the following:
  • DMRS port indication information information of precoded codebook or precoding matrix, CSR
  • the determination of the basic information depends on the value of the SRI.
  • An embodiment of the present disclosure further provides an indication device, including: a notification module;
  • the notification module is used to notify the DMRS port indication, the SRI and the transmission precoding indication to the terminal to notify the basic information
  • the basic information includes at least one of the following:
  • DMRS port indication information information of precoded codebook or precoding matrix, CSR
  • the determination of the basic information depends on the value of the SRI.
  • An embodiment of the present disclosure further provides an information determining device, including: a receiving determining module;
  • the receiving determination module is configured to receive a DMRS port indication, an SRI, and a transmission precoding indication notified by a base station to determine basic information, where the basic information includes at least one of the following:
  • DMRS port indication information information of precoded codebook or precoding matrix, CSR
  • the determination of the basic information depends on the value of the SRI.
  • An embodiment of the present disclosure further provides a base station, including: a first processor, a first memory, and a first communication bus;
  • the first communication bus is configured to implement connection and communication between the first processor and a first memory
  • the first processor is configured to execute one or more first programs stored in the first memory to implement the foregoing instruction method.
  • An embodiment of the present disclosure further provides a terminal, including: a second processor, a second memory, and a second communication bus;
  • the second communication bus is configured to implement connection and communication between the second processor and a second memory
  • the second processor is configured to execute one or more second programs stored in the second memory to implement the foregoing information determination method.
  • An embodiment of the present disclosure further provides a storage medium.
  • the computer-readable storage medium stores one or more computer programs, and the one or more computer programs can be executed by one or more processors to implement the foregoing instruction method. , Or implement the information determination method described above.
  • the indication method, information determination method, device, base station, terminal, and storage medium notify the DMRS port instruction, SRI, and transmission precoding instruction to the terminal, so that the terminal can determine the method for implementing uplink based codebook.
  • Basic information required for transmission (including DMRS port indication information, precoded codebook or precoding matrix information, at least one of CSR, and the determination of these basic information depends on the value of SRI), so that the terminal According to the requirements of the base station, data transmission can be realized in a single panel or multiple panels. That is, the base station can implicitly notify the DMRS mapping information, CSR, precoding codebook, etc. according to the dynamic indication of the SRI, so that the terminal can effectively dynamically switch between single-beam and multi-beam, and supports multi-panel transmission And flexible support for dynamic indication between single-panel transmission and multi-panel transmission.
  • FIG. 1a is a schematic diagram of a 2-antenna port provided by related technologies
  • FIG. 1b is a schematic diagram of a 4-antenna port provided by related technologies
  • FIG. 2 is a schematic diagram of interaction between a base station and a terminal according to an embodiment of the present disclosure
  • FIG. 3 is a schematic structural diagram of a 2 antenna panel and 4 antenna ports according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of another 2 antenna panel and 4 antenna port structure provided by an embodiment of the present disclosure.
  • FIG. 5 is a schematic diagram of a diagonal exchange provided by an embodiment of the present disclosure.
  • FIG. 6 is another schematic diagram of diagonal exchange according to an embodiment of the present disclosure.
  • FIG. 7 is another schematic diagram of diagonal exchange according to an embodiment of the present disclosure.
  • 8A is a schematic structural diagram of a 2-antenna panel and 8-antenna port according to an embodiment of the present disclosure
  • 8B is a schematic diagram of another 2 antenna panel and 8 antenna port structure provided by an embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram of a diagonal exchange provided by an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of an indicating device according to Embodiment 11 of the present disclosure.
  • FIG. 11 is a schematic structural diagram of an information determining apparatus according to Embodiment 11 of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a base station according to Embodiment 12 of the present disclosure.
  • FIG. 13 is a schematic structural diagram of a terminal according to Embodiment 12 of the present disclosure.
  • first, second, etc. may be used herein to describe various elements or operations, these elements or operations should not be limited by these terms. These terms are only used to distinguish one element or operation from another. For example, a first feature may be referred to as a second feature, and similarly, a second feature may be referred to as a first feature without departing from the teachings of the present disclosure.
  • FIG. 2 is a schematic diagram of interaction between a base station and a terminal according to a first embodiment of the present disclosure.
  • S201 is essentially an indication method on the base station side, including:
  • the UE terminal
  • each antenna panel has multiple antenna ports
  • the analog beams emitted by different panels of the UE may not be required.
  • the same, and multiple antenna panels can send reference signals or data at the same time.
  • the base station may configure an SRS (Sounding Reference Signal) resource set (resource set) to a UE through RRC (Radio Resource Control, Radio Resource Control) signaling, which is used for codebook-based based) uplink transmission, and this SRS resource set may include multiple SRS resources, each SRS resource may correspond to an antenna panel of a UE, and each SRS resource may be configured with a separate spatial correlation information parameter (SRS-SpatialRelationInfo), Represents the beam used by the UE to send the SRS resource.
  • SRS-SpatialRelationInfo separate spatial correlation information parameter
  • the base station needs to schedule PUSCH (Physical Uplink Shared Channel) transmission through downlink control information format (DCI format) 0_1.
  • PUSCH Physical Uplink Shared Channel
  • the base station may instruct the SRI to represent the resource index of the SRS, so that the UE needs to send the PUSCH according to the beam or panel of the indicated SRS resource when transmitting the PUSCH.
  • the base station needs to instruct TPMI for precoding operations on multiple ports in the panel corresponding to the SRS resource.
  • the base station may notify the DMRS port indication, the SRI and the transmission precoding indication to the terminal to notify the terminal of basic information
  • the basic information includes at least one of the following: DMRS port indication information, precoded codebook or precoding Coding matrix information, CSR.
  • the determination of the DMRS port indication information, the information of the precoded codebook or the precoding matrix, and the basic information of the CSR in this embodiment should depend on the value of the SRI.
  • the corresponding basic information may be determined depending on the size of the R value corresponding to the SRI.
  • the R value is the number of SRS resources or the number of reference signals RS included in the spatial information parameters of the corresponding SRS resources.
  • a combination of precoding and layer number indication corresponding to multiple UE panels may be limited. That is, in this embodiment, the base station can configure a codebook subset limit for the UE.
  • the codebook subset limit is a combination of multiple precoding and layer number indications. In this way, when the R value corresponding to the SRI is greater than 1 (that is, when there are two or more SRS resources indicated), the CSR applied to multiple precoding and layer number indications is selected to correspond to multiple UE panels.
  • the combination of precoding and layer number indication limits are examples of precoding and layer number indication limits.
  • the CSR when the R value corresponding to the SRI is 1, the CSR will also be configured for it.
  • This CSR is used to limit the selection of the precoding and layer number indication when the SRI corresponds to one SRS resource. It does not involve multiple precoding. Coding and number of layers indicate the limits of the combination.
  • the base station notifies multiple precoding matrices in the DCI, and each column of each precoding matrix notified is non-zero.
  • the number of elements is the same.
  • the indicated precoding attributes of multiple panels of the UE must be the same. That is, among the multiple TPMIs indicated to the UE, the number of non-zero elements in a certain column of one TPMI is the same as the number of non-zero elements in a certain column of another TPMI.
  • the number of non-zero elements represents the transmission capability of the UE, such as Stands for non-coherent transmission, and This means full coherent transmission.
  • the precoding attributes of different panels must be the same, and CSR is not required to restrict (of course, CSR can also be used to restrict at the same time).
  • the base station may be configured with multiple sets of CSRs for the UE, and the application of the actual CSR depends on the indication of the SRI.
  • the base station may configure two sets of codebook subset restrictions for the UE through high-level signaling, one set for single-panel transmission and one set for multi-panel transmission.
  • the application of the actual codebook subset limitation depends on the number of SRS resources indicated by the SRI. Specifically, when the SRI indicated in the DCI corresponds to one SRS resource, the first CSR is used, and when the SRI indicated in the DCI corresponds to two or more SRS resources, the second CSR is used.
  • the base station may configure a set of CSRs corresponding to each SRI value. This has the highest flexibility, and the base station can even limit different codebook subsets for different panels of the UE.
  • a codebook may be redesigned for multi-Panel transmission, and the new codebook is different from the original single-panel codebook.
  • the new codebook is different from the original single-panel codebook.
  • the transmission precoding matrix is determined according to the transmission precoding instruction and the codebook corresponding to the R value.
  • the number of rows of the precoding matrix in the selected codebook is P * R; P * R indicates that there are P * R ports, and each port corresponds to the precoding matrix in order.
  • Each line of the; and P is the number of ports configured for each SRS resource.
  • the first to fourth rows correspond to ports 0-3 in turn.
  • the four ports of the two antenna panels are 0-3 in sequence. At this time, the first two rows of the precoding matrix correspond to the first SRS resource from the first. Panel, the last two lines correspond to the second SRS resource, which comes from the second panel.
  • the four ports of the two antenna panels are 0, 2, 1, and 3 in sequence.
  • the first, third, and second rows of the precoding matrix correspond to the first one.
  • the SRS resource comes from the first panel, and the second and fourth two lines correspond to the second SRS resource from the second panel.
  • At least an element having a (1-1 / R) ratio is zero. That is, when one panel sends a layer of data, other panels do not send data on that layer.
  • the first half of the ports in the precoding matrix belong to the first panel and the second half of the ports belong to the second panel, then when the number of SRS resources corresponding to the SRI or the spatial information parameters of the corresponding SRS resources When the number is greater than 1, at least the first half of the elements in each column of the precoding matrix in the codebook is zero or the second half of the elements is zero.
  • the number of non-zero elements included in each column of the precoding matrix in the codebook may be limited.
  • the P * R ports can be divided into 4 groups in order, and at least the elements corresponding to the ports of the odd-numbered port group are all zero or even bits. The elements corresponding to the ports of the port group are all zero.
  • the spatially related information of the corresponding first P ports in the precoding matrix comes from the first of the SRS resources indicated by the SRI, or from the first of the SRS resources indicated by the SRI.
  • the first RS included in the spatial information parameter; the spatial related information of the next P ports comes from the second of the SRS resource indicated by the SRI, or from the RS included in the spatial information parameter of the SRS resource indicated by the SRI. The second one.
  • the 2P ports can be sequentially divided into 4 groups; the corresponding port numbers in the precoding matrix that belong to the P ports of the even array are spatially related information from the SRI indication
  • At least one precoding matrix in the precoding matrix in the codebook is a diagonal switching matrix of another precoding matrix.
  • the diagonal swap matrix refers to: each row in the P * R row precoding matrix is divided into 4 groups in order. If a precoding matrix contains elements with even non-zero elements in the even array, the number is T1, move the X elements belonging to the upper left corner T1 column in the even array to the element positions on the lower right corner T1 column belonging to the odd array; T2, move the Y elements belonging to the lower right corner T2 column in the odd array to the elements on the upper left corner T2 column belonging to the even array.
  • the matrix thus obtained is the diagonal swap matrix of the precoding matrix; or
  • the X elements in the upper left corner of the precoding matrix are placed in the lower right corner of the precoding matrix, and then the Y elements in the lower right corner of the precoding matrix are placed in the upper left corner of the precoding matrix.
  • the resulting matrix is the precoding matrix Diagonal switching matrix; where X and Y are positive integers.
  • Figure 5 shows two diagonal switching matrices.
  • R> 1 when R> 1, at least two transmission layers (layers) are sent from different UE panels. At this time, the assignment of DMRS ports is different from that of a UE panel. In order to save DMRS overhead, allocating to a UE port 0 and port 1 is a good choice. However, when R> 1, the layer 2 transmission comes from two different panels, and the time-frequency offset of these two different panels may be different, and port 0 and port 1 are no longer suitable. Because port 0 and port 1 are code-divided, in a code division multiplexing (Code Division Multiplexing, CDM) group, the time-frequency offset is different, which will cause demodulation performance to decline. Therefore, in an example of this embodiment, when R> 1, the number of DMRS ports indicated by the DMRS port indication information should be at least two, or the number of transport layers with one should not be included in the precoded codebook. happening.
  • CDM Code Division Multiplexing
  • the differences in R correspond to different DMRS port mapping tables. That is, the candidate values of the port mapping corresponding to different R are different.
  • the DMRS port mapping table does not include the case where multiple layers occupy only one DMRS CDM group.
  • S202 Receive a DMRS port indication, SRI, and transmission precoding indication notified by the base station to determine basic information.
  • the basic information includes at least one of the following: DMRS port indication information, precoded codebook or precoding matrix information, and CSR.
  • the determination of the DMRS port indication information, the information of the precoded codebook or the precoding matrix, and the basic information of the CSR should depend on the value of the SRI.
  • the UE may depend on the size of the R value corresponding to the SRI to determine the corresponding basic information.
  • the R value is the number of SRS resources or the number of reference signals RS included in the spatial information parameters of the corresponding SRS resources.
  • the CSR selected by the UE should be a CSR applied to multiple precoding and layer number indication combinations.
  • the UE may receive multiple precoding matrices notified in the DCI (the number of non-zero elements in each column of each precoding matrix notified is the same).
  • the UE may select a codebook corresponding to the R value; and further determine a transmission precoding matrix according to the transmission precoding instruction and the codebook corresponding to the R value.
  • the number of rows of the precoding matrix in the codebook selected by the UE is P * R;
  • P * R indicates that there are P * R ports, and each port is in order Corresponding to each row of the precoding matrix;
  • the P is: the number of ports configured for each SRS resource.
  • each column in the precoding matrix in the codebook may have at least a (1-1 / R) ratio of zero elements .
  • the number of non-zero elements included in each column of the precoding matrix in the codebook may be the same.
  • the number of rows of the precoding matrix in the codebook selected by the UE is P * R
  • at least the first half element or the last half element of each column in the precoding matrix in the codebook is zero.
  • the P * R ports can be divided into 4 groups in order, at least the elements corresponding to the ports of the odd-numbered port group are all zero or the elements corresponding to the ports of the even-numbered port group are all zero.
  • the spatially related information of the corresponding first P ports in the precoding matrix comes from the SRS resource indicated by the SRI
  • the first of the RS, or the first of the RS included in the spatial information parameter of the SRS resource indicated by the SRI; the spatially related information of the last P ports comes from the second of the SRS resource indicated by the SRI, or from The second RS included in the spatial information parameter of the SRS resource indicated by the SRI.
  • the 2P ports can be sequentially divided into 4 groups; the corresponding port numbers in the precoding matrix belong to
  • the spatial related information of the P ports of the even array comes from the first of the SRS resources indicated by the SRI, or from the first of the RS contained in the spatial information parameters of the SRS resources indicated by the SRI; the port numbers belong to the odd array
  • the spatial related information of the P ports comes from the second of the SRS resources indicated by the SRI or from the second of the RS included in the spatial information parameters of the SRS resources indicated by the SRI.
  • the diagonal swap matrix refers to: each row in the P * R row precoding matrix is divided into 4 groups in order. If a precoding matrix contains elements with even non-zero elements in the even array, the number of columns is T1, move the X elements belonging to the top left column T1 in the even array to the position of the elements on column T1 belonging to the odd array in the bottom right; if the number of non-zero elements in a precoding matrix that belongs to the odd array is T2, move the Y elements belonging to the lower right corner T2 column in the odd array to the elements on the upper left corner T2 column belonging to the even array.
  • the matrix thus obtained is the diagonal switching matrix of the precoding matrix; or, The X elements in the upper left corner of the precoding matrix are placed in the lower right corner of the precoding matrix, and then the Y elements in the lower right corner of the precoding matrix are placed in the upper left corner of the precoding matrix.
  • the resulting matrix is the precoding matrix Diagonal switching matrix; where X and Y are positive integers.
  • R> 1 when R> 1, at least two transmission layers will be sent from different UE panels. At this time, the assignment of DMRS ports is different from that of a UE panel. In order to save DMRS overhead, allocating to a UE port 0 and port 1 is a good choice. However, when R> 1, the layer 2 transmission comes from two different panels, and the time-frequency offset of these two different panels may be different, and port 0 and port 1 are no longer suitable. Because port 0 and port 1 are code-divided, in a CDM group, the time-frequency offset is different, which will cause the demodulation performance to decrease. Therefore, in an example of this embodiment, when R> 1, the number of DMRS ports indicated by the DMRS port indication information received by the UE should be at least 2, or the pre-encoded codebook should not include the number of transmission layers. When the number is 1.
  • the terminal can correspondingly determine the DMRS port instruction information, the precoded codebook or the information of the precoding matrix, CSR, etc. , And further, the PUSCH may be sent according to the beam or panel of the indicated SRS resource.
  • the terminal by notifying the DMRS port instruction, the SRI and the transmission precoding instruction to the terminal, so that the terminal can determine the basic information required to implement uplink codebook-based transmission ( (Including DMRS port indication information, pre-coded codebook or pre-coding matrix information, at least one of CSR, and the determination of these basic information depends on the value of SRI), so that the terminal can be used in a single panel according to the requirements of the base station Data transmission in the case of multiple panels. That is, the base station can implicitly notify the DMRS mapping information, CSR, precoding codebook, etc. according to the dynamic indication of the SRI, so that the terminal can effectively dynamically switch between single-beam and multi-beam, and realizes support for multi-panel transmission And flexible support for dynamic indication between single-panel transmission and multi-panel transmission.
  • uplink codebook-based transmission (Including DMRS port indication information, pre-coded codebook or pre-coding matrix information, at least one of CSR, and the determination of these basic information depends on the value of SRI)
  • the base station can configure an SRS resource set to a UE through RRC signaling for codebook based uplink transmission, and this SRS resource set can include multiple SRS resources, each SRS resource can correspond to a UE's antenna panel, and each The SRS resource can be configured with a separate spatially related information parameter, which represents the beam that the UE will use to send the SRS resource. After the UE sends this SRS resource set, the base station needs to schedule PUSCH transmission through DCI format 0_1.
  • the base station can instruct the SRI to represent the resource index of the SRS, so that when the UE sends the PUSCH, it needs to send the PUSCH according to the indicated SRS resource beam or Panel.
  • the base station needs to instruct TPMI for the precoding operation of multiple ports in the panel corresponding to the SRS resource.
  • the UE has 2 antenna panels, and each antenna panel has 2 antenna ports, as shown in FIG. 3. If the base station instructs the UE to transmit PUSCH simultaneously with two antenna panels, then the number of antenna ports of the UE is actually four.
  • An intuitive solution is to use the 4-antenna codebook in the related technology. However, since phase compensation cannot be performed between the two antenna panels, that is, coherent transmission cannot be performed, then the 4-antenna codebook in the related technology is not combined. Not applicable.
  • the base station can instruct the UE with two independent precoding and layer number indications, and the two independent precodings are based on the codebook of the two antennas.
  • Tables 1-1.1 and 1-1.2 list the codebooks for 1-layer data transmission (1-layer) and 2-layer data transmission (2-layers) in the case of 2 antennas, respectively.
  • the base station needs to indicate the precoding and layer information in the DCI, as shown in Table 1-1.3, that is, each panel needs 4 bits to inform the precoding and layer information.
  • the physical layer signaling overhead caused by the two independent precoding and layer number indications notified to the UE in DCI is completely independent, that is, 8 bits, and the complexity of the UE will be greatly increased, because the UE needs to consider Combination of any two TPMIs.
  • the combination of precoding and layer number indication corresponding to multiple UE panels can be restricted.
  • the base station configures a codebook subset limit for the UE through high-level signaling.
  • the codebook subset limit is a combination of multiple precoding and layer number indications.
  • the base station uses the CSR to tell the user
  • multiple precoding and layer number indications are notified by the DCI
  • the two precoding corresponding to the two panels The combination of coding and layer number indication is invalid.
  • the UE has 2 panels, and the base station uses a 81-bit CSR to notify the user whether the combination of the precoding and layer number indication of the first panel and the precoding and layer number indication of the second panel is valid.
  • the precoding and layer number indication of the first panel requires 9 indexes, and the precoding and layer number indication of the second panel also requires 9 indexes.
  • the combination of independent precoding and layer number indication of the two panels There are 81 states. As shown in Table 1-1.4, the CSR bits have a total of 81 bits. If the value is 0, it indicates that the two precoding and layer number indication information is invalid.
  • the base station When indicating multiple precoding and layer number indications in DCI, only the combination of effective precoding and layer number indications need to be considered, that is, the overhead of DCI depends on the number of valid combinations of multiple precoding and layer number indications. . If the number of bit values of 1 in the CSR is 16, then only 4 bits in the DCI need to be used to select one of the 16 valid precoding and layer number indication combinations. At this time, the base station notifies in the DCI two indexes of the combination of precoding and layer number indication, and one index represents the two precoding and layer number indication.
  • the indicated precoding attributes of multiple panels of the UE must be the same. That is, among the multiple TPMIs indicated to the UE, the number of non-zero elements in a certain column of one TPMI is the same as the number of non-zero elements in a certain column of another TPMI.
  • the number of non-zero elements represents the transmission capability of the UE, such as Stands for non-coherent transmission, and It means full coherent transmission. In this way, it is stipulated that multiple Panels of the UE are either coherent transmissions or non-coherent transmissions. With such a rule, the TPMI attributes of different panels must be the same, and no CSR signaling is required to notify.
  • the precoding matrix synthesized by the 2 TPMIs finally notified should be 4 rows.
  • the first and second rows of the precoding matrix are applied to the first panel, that is, port 0 and port 1; the third and fourth rows are applied to the second panel, that is, port 3 and port 4.
  • the base station can configure an SRS resource set for a UE through RRC signaling for codebook based uplink transmission, and this SRS resource set can include multiple SRS resources, and each SRS resource can correspond to a UE Antenna panel, and each SRS resource can be configured with a separate spatial related information parameter, which represents the beam that the UE will use to send the SRS resource.
  • the base station needs to schedule PUSCH transmission through DCI format 0_1.
  • the base station can instruct the SRI to represent the resource index of the SRS, so that when the UE sends the PUSCH, it needs to send the PUSCH according to the indicated SRS resource beam or Panel.
  • the base station can use SRI in DCI to indicate one SRS resource or multiple SRS resources, such as two.
  • One SRS resource corresponds to a single panel transmission
  • multiple SRS resources corresponds to a multi-panel transmission.
  • Each resource is configured with 2 ports.
  • the value of the 2bit SRI is shown in Table 1-2.1. It is assumed that the SRS resource set that the base station configures to the UE for codebook based transmission through RRC signaling contains 2 resources, which are resource0 and resource1.
  • the role of the CSR is to limit some precoding and layer number indications.
  • the role of the CSR is to limit the combination of some precoding and layer number indications, as described in Embodiment 2,
  • the codebook subset limitation at this time is a combination when applied to multiple precoding and layer number indications.
  • the base station configures multiple sets of codebook subset restrictions for the UE through high-level signaling.
  • the application of the actual codebook subset restriction depends on the indication of the SRI.
  • the base station configures two sets of codebook subset restrictions for the UE through high-level signaling, one set for single-panel transmission and one set for multi-panel transmission.
  • the application of the actual codebook subset limitation depends on the number of SRS resources indicated by the SRI.
  • the base station configures two sets of CSRs for the UE through high-level signaling. When the SRI indicated in the DCI corresponds to one SRS resource, the first set of CSRs is used, and when the SRI indicated in the DCI corresponds to two SRS resources. , Use the second set of CSR.
  • the base station can configure multiple sets of codebook subset restrictions for the UE through high-level signaling, and each set corresponds to an SRI value. This has the highest flexibility, and the base station can even limit different codebook subsets for different panels of the UE.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • some SRS resources in the SRS resource set configured through RRC signaling may include multiple RS resources, or some SRS resources may have multiple spatial information parameters.
  • These SRS The resource is equivalent to configuring multiple beams, that is, corresponding to multiple panels. Therefore, the base station configures multiple sets of codebook subset restrictions for the UE through high-level signaling. The application of the actual codebook subset restrictions depends on the indication of the SRI.
  • the space-related information parameters in an SRS resource corresponding to the SRI indicated in the DCI include When one RS (reference signal) or the spatial information parameter of the SRS resource is 1, a set of CSRs configured at a higher layer is called CSR1; and when the SRI indicated in the DCI corresponds to the spatial related information in an SRS resource
  • CSR1 and CSR2 can be independently configured and applied to single-panel transmission and two-panel transmission.
  • the role of CSR2 is to limit the combination of multiple precoding and layer number indications for multi-panel transmission.
  • the application of CSR depends on the instructions of SRI. Further, the selection of the CSR depends on the number of SRS resources corresponding to the SRI or the number R of RSs included in the spatial correlation parameters of the SRS resources corresponding to the SRI. When R is greater than 1, the corresponding CSR is a combination of multiple precoding and layer number indications.
  • the base station often uses DCI to indicate multiple TPMIs to the UE. In order to reduce the complexity, the non-zero values of each column of a TPMI The number of zero elements is the same as the number of nonzero elements in each column of another TPMI.
  • the corresponding CSR elements may be many, so RRC signaling and media access control can be used (Medium Access Control, MAC) control unit (Control Element, CE) to perform CSR execution.
  • MAC Medium Access Control
  • RRC signaling selects the combination of A2 precoding and layer number indication from the combination of A1 precoding and layer number indication, and then MAC CE selects A3 from the combination of A2 precoding and layer number indication.
  • the combination of precoding and layer number indication is to choose a combination of precoding and layer number indication from the combination of A3 precoding and layer number indication, that is, the overhead of DCI depends on A3.
  • the RRC signaling performs codebook subset restriction on multiple TPMIs individually (instead of limiting multiple TPMI combinations), and then the MAC CE selects a combination of multiple effective TPMIs after RRC restriction. Finally, DCI selects a combination of TPMI from the combination of valid multiple TPMI selected by MAC CE.
  • the DCI overhead depends on the number of valid TPMI combinations selected by the MAC CE.
  • Embodiment 5 is a diagrammatic representation of Embodiment 5:
  • the base station can instruct the UE with two independent precoding and layer number indications, and these two independent precoding are based on the codebook of 2 antennas.
  • the base station can instruct the UE with two independent precoding and layer number indications, and these two independent precoding are based on the codebook of 2 antennas.
  • such an independent scheme of indicating two two-antenna precoding and layer number indication greatly increases DCI overhead.
  • the CSR scheme is used to limit the combination of the two precoding and layer number indications.
  • This solution leaves the task of controlling DCI overhead to the base station. But this may still not meet the low complexity requirements of the UE. Because the UE should be able to support all precoding combinations of 2 Panels when designing.
  • the codebook can be redesigned for multi-Panel transmission, that is, the new codebook is different from the original single-panel codebook.
  • the base station can use SRI in DCI to indicate one SRS resource or multiple SRS resources, corresponding to single-panel transmission or multi-panel transmission; or the base station can use SRI to correspond Whether the spatially-related information parameter configured in the SRS resource includes one RS or multiple RSs, respectively corresponding to single-panel transmission or multi-panel transmission.
  • this RS may be SSB (Single Side Band, Single Sideband), CSI-RS (Channel State Information Reference Signal, channel measurement reference signal), SRS. It can be seen that, for the example in FIG. 3, the number of ports of each SRS resource should be configured as two.
  • the transmission is a single panel, and the codebook used is the codebook of a single panel, which can be marked as codeboook1; and
  • the spatial related information parameter contains multiple RSs (such as multiple SSB indexes, or multiple CSI-RS resources indexes, or multiple SRSs). resource index), then multi-panel transmission, all codebooks are multi-panel codebooks, which can be marked as codeboook2.
  • the codebook should be different, that is, codebook1 is different from codebook2. Therefore, the selection of the codebook for uplink transmission actually depends on the notification of the SRI in the DCI. Specifically, the selection of the codebook for uplink transmission actually depends on the number of SRS resources corresponding to the SRI or the number of RSs included in the spatial information parameters of the corresponding SRS resources. That is, when the number of SRS resources corresponding to the SRI or the number of RSs included in the spatial information parameters of the corresponding SRS resources are different, the codebooks used for uplink transmission are different. In other words, the selection of the codebook changes dynamically depending on the indication of the SRI.
  • Embodiment 6 is a diagrammatic representation of Embodiment 6
  • the precoding matrix synthesized by the 2 TPMIs finally notified should be 4 rows.
  • the first and second rows of the final precoding matrix are applied to the two ports of the first panel, namely port 0 and port 1; the third and fourth rows are applied to the two ports of the second panel, ie Port 3 and port 4.
  • the precoding and layer number indication of the first panel is 1 layer: [1 0] T
  • the precoding and layer number indication of the second panel is 1 layer: [0 1] T
  • the actual final precoding matrix should be
  • the number of ports configured for each resource under the SRS resource set for codebook based uplink transmission is P
  • the number of rows of the precoding matrix in the corresponding codebook is P * R, that is, the total number of ports is P * R.
  • the selection of the codebook for uplink transmission actually depends on the SRI notification in the DCI. Specifically, when the number of SRS resources corresponding to the SRI or the number of RSs contained in the spatial information parameters of the corresponding SRS resources is greater than At 1, at this time, at least half of the elements in each precoding matrix in the codebook are zero. If R> 2, then the least (1-1 / R) proportion of the elements is zero. In other words, when one panel sends a layer of data, other panels do not send data on that layer.
  • the numbering of the antenna ports is performed according to FIG. 3, that is, the first half of the ports belong to the first panel and the second half of the ports belong to the second panel, then specifically, it can be said that when the number of SRS resources corresponding to the SRI or corresponding When the number of RSs contained in the spatial information parameter of the SRS resource is greater than 1, at this time, at least the first half of the elements in each column of the precoding matrix in the codebook is zero or the second half of the elements is zero. This is because for panel1, the first two ports are occupied, that is, the last two ports do not send anything to Panel1, that is, they send zero elements; while for panel2, they occupy the last two ports, that is, the first two ports.
  • This port does not send anything to Panel 2, which is sending zero elements.
  • the first two ports (port 0 and port 1) come from Panel1, which correspond to the first two rows of the precoding matrix, and the last two ports (port 2 and port 3) come from Panel2, which correspond to the precoding In the last two rows of the matrix, when the number of SRS resources corresponding to the SRI is 2, then port 0 and port 1 correspond to the first of the two SRS resources indicated by the SRI, and the spatial related information sources of port 0 and port 1
  • the first of the two SRS resources indicated by the SRI; port 2 and port 3 correspond to the second of the two SRS resources indicated by the SRI, and the spatial related information of port 2 and port 3 is derived from the two SRS indicated by the SRI The second resource.
  • port 0 and port 1 correspond to the first RS contained in the spatial information parameter of the SRS resource indicated by the SRI
  • the spatial related information of port 0 and port 1 comes from the first RS included in the spatial information parameter of the SRS resource indicated by SRI
  • port 2 and port 3 correspond to the spatial information parameters of the SRS resource indicated by SRI
  • the second RS of the RS, and the spatial related information of port 2 and port 3 is derived from the second RS of the RS included in the spatial information parameter of the SRS resource indicated by the SRI.
  • the transmission of port 0 and port 1 when the number of SRS resources corresponding to the SRI or the number of RSs included in the spatial information parameter of the corresponding SRS resource is 2, the transmission of port 0 and port 1, and the transmission of port 2 and port 3
  • the beams are respectively from the two RSs included in the spatial information parameters of the two SRS resources indicated by the SRI or the one SRS resource indicated by the SRI.
  • the precoding matrix may only have 2 rows, that is, only 2 ports. At this time, these 2 The spatial information parameters of each port are derived from the SRS resources corresponding to the SRI. At this time, for simplicity, these two ports issued by any panel can be labeled as port 0 and port 1.
  • the space-related information of the first P ports in the precoding matrix comes from the first of the two SRS resources indicated by the SRI, and the space of the last P ports
  • the relevant information is from the second of the two SRS resources indicated by the SRI; or when the number of RSs included in the spatial information parameter of the SRS resource corresponding to the SRI is 2, the first P ports in the precoding matrix
  • the spatial related information comes from the first RS included in the spatial information parameter of the SRS resource indicated by the SRI.
  • the spatial related information of the last P ports in the precoding matrix comes from the spatial information parameter of the SRS resource indicated by the SRI. Contains the 2nd RS.
  • Embodiment 7 is a diagrammatic representation of Embodiment 7:
  • the two panels of the UE respectively send data streams based on different beams.
  • the number of transmission layers is at least two.
  • the number of DMRS ports is at least two.
  • the two panels of the UE each send a layer 1 data stream, that is, each sends a DMRS port: 1 + 1
  • the precoding matrices of the 2-port and 2-layer NR are as follows:
  • the first column of the precoding matrix comes from the first panel, and the second column comes from the second panel.
  • the above matrix needs to be transformed into a 4-port precoding matrix, that is, the precoding matrix needs 4 rows and its size is 4 ⁇ 2.
  • the last two rows of the columns of the precoding matrix corresponding to the first panel need to be inserted with zero elements, that is, zeros on ports 2 and 3; the first two rows of the columns of the precoding matrix corresponding to the second panel need to be inserted with zeros Element, which is zero on port 0 and port 1.
  • the converted codebook can be found in Table 1-6.2 below. For simplicity, the amplitude of the precoding matrix is not given in this paper.
  • the precoding vector can only be [1, 0], [1, 1], [1, j], and cannot be [0, 1], [1, -1], [1, j];
  • the precoding vector can only be [0], [1, -1], [1, j], but not [1, 0], [1, 1], [1]. Since the 2 panels have independent rows, such a limitation will cause a performance loss.
  • one precoding matrix in the codebook is another diagonal exchange.
  • the diagonal swap means that some elements in the upper left corner and some elements in the lower right corner of a precoding matrix are swapped.
  • the element at the upper left corner of the precoding matrix is the precoding vector set of the first panel
  • the element at the lower right corner is the precoding vector set of the second panel.
  • the precoding vectors of the two panels are swapped.
  • a precoding matrix contains two sets of precoding vectors (a vector is a column of the precoding matrix), which is applied to two panels respectively. On the rows of non-zero elements of the precoding vectors in the first set of precoding vectors, the elements of the precoding vectors in the second set of precoding vectors are all zero.
  • the precoding matrix in the lower row is the diagonal switching matrix above.
  • the advantage of this is that for a Panel, different precoding vectors can be tried, which makes up for the deficiency of the matrix without increasing the number of precoding matrices too much.
  • the two panels of the UE each send a layer 1 data stream, that is, each sends a DMRS port: 1 + 1
  • the two panels of the UE generate 2 data layer and 1 layer data, respectively, or send 1 layer data and 2 layer data respectively: 2 + 1 or 1 + 2
  • the first and second columns of the precoding matrix can be predefined from the first panel, and the third column can be derived from the second panel. Since the first and second columns of the precoding matrix correspond to the first UE panel, the elements of the last two rows of these two columns should be zero, because the first panel only occupies port 0 and port 1. Because the third column of the precoding matrix corresponds to the second UE panel, the first two rows of this column should be zero, because the second panel only takes up port 2 and port 3.
  • the attributes of the precoding vectors sent by the two Panels of the UE can be restricted, that is, the number of non-zero elements contained in all columns in each precoding matrix with the number of layers 3 The number is the same. Although it limits some scheduling flexibility, it is also more in line with the actual channel and UE antenna properties.
  • the precoding codebook obtained according to this attribute is shown in Table 1-6.4.
  • one precoding matrix in the codebook is another diagonal exchange.
  • the diagonal swap means that some elements in the upper left corner and some elements in the lower right corner of a precoding matrix are swapped.
  • the number of layers is 3, that is, the 4 elements in the upper left corner and the 2 elements in the lower right corner are exchanged.
  • diagonal swap means that the X elements in the upper left corner of the precoding matrix are placed in the lower right corner of the precoding matrix, and then the Y elements in the lower right corner of the precoding matrix are placed in the upper left corner of the precoding matrix. .
  • X may not be equal to Y.
  • the precoding matrix has Z rows, then the number of all elements of the first Z / 2 rows contained in the column with nonzero elements in the first Z / 2 rows of the precoding matrix is X, and the last Z of the precoding matrix is X The number of all elements of the last Z / 2 rows contained in the column with nonzero elements in the / 2 row is Y.
  • Diagonally swapping all the precoding matrices in Table 1-6.4 another 10 precoding matrices will be derived, so there will be a total of 20 precoding matrices in the case of 3 layer transmission in the codebook, of which every 2 are diagonal Switching matrix.
  • the second row is the diagonal swap of the precoding matrix in the first row
  • the fourth row is the diagonal swap of the precoding matrix in the third row
  • the sixth row is the fifth Diagonal swap of the precoding matrices of the rows.
  • the number of columns containing non-zero elements corresponding to ports 0 and 1 in the precoding matrix is the number of layers Q sent by the first panel, that is, the first of the two SRS resources corresponding to the SRI or the SRI corresponding.
  • the first of the two RSs in the spatially related parameters of the SRS resource is associated with Q layers; the number of columns containing non-zero elements corresponding to ports 2 and 3 in the precoding matrix is the layer of the second panel.
  • the number W that is, the second of the two SRS resources corresponding to the SRI or the second of the two RSs in the spatial correlation parameter of the SRS resource corresponding to the SRI, is associated with the W layers. There are a total of Q + W layers. The first panel occupies the first Q and the second panel occupies the last W.
  • precoding matrices there seem to be a lot of 20 precoding matrices. In order to further limit the number of precoding matrices in the codebook. It may have the following provisions:
  • phase coefficients are the same or opposite.
  • the same attributes mean that they are all real or imaginary numbers; the opposite is that one attribute is real and one is imaginary.
  • the phase coefficient refers to the precoding coefficients of port 1 and port 3, that is, the values of the second and fourth rows of the precoding matrix (a row index of 0 is the first One line).
  • the second and fourth rows correspond to the phase coefficients of the two Panels, respectively.
  • the attributes of the phase coefficients in the upper left corner and the lower right corner of the matrix are the same, that is, ports 1 and 3 correspond
  • the coefficients of are either real or imaginary.
  • the precoding matrix in Table 1-6.5 Does not meet this requirement. In this way, the precoding matrices in Table 1-6.5 that do not meet this requirement are removed, and the precoding matrices in the codebook are as shown in Table 1-6.6, which is only 12.
  • the advantage of this is to reduce the overhead of the DCI, while ensuring that the phase compensation of the two panels in the different polarization directions is consistent. If the channel attribute difference between the two Panels of the UE is not large, then this method can be applied well without causing much performance loss.
  • precoding matrix in Table 1-6.5 Does not meet this requirement. In this way, the precoding matrices in Table 1-6.5 that do not meet this requirement are removed, and the precoding matrices in the codebook are as shown in Table 1-6.7, which is only 12.
  • the advantage of this is to reduce the overhead of DCI, and at the same time to ensure that the phase compensation of the two panels in different polarization directions is inconsistent, and in some cases there will be diversity gain. If the channel attributes of the two Panels of the UE are very different, then this method can be applied well without much performance loss.
  • one of the precoding matrices in the codebook is another diagonal swap. See the following two matrices in Table 1-6.8.
  • the attributes of the phase coefficients in the upper left corner and the lower right corner of the matrix are the same or opposite. For example, if the rules are reversed, then the precoding matrix Does not meet the requirements, should be removed from the codebook transmitted at layer 4.
  • Embodiment 8 is a diagrammatic representation of Embodiment 8
  • the port mapping of the four antennas is shown in Figure 4, and the methods of some precoding matrices above are slightly different.
  • the first panel sends ports 0 and 2 and is mapped on the first and third rows of the precoding matrix; the second panel sends port 1 and port 3 and is mapped on the precoding matrix Lines 2 and 4.
  • each of all the precoding matrices in the codebook In a column at least half of the elements are still 0, and all odd bits are all zeros or even bits are all zeros, as shown in Table 1-7.1 below.
  • a, b, c, d, e, f may still be equal to zero.
  • one precoding matrix in the codebook is another diagonal exchange. That is, some elements in the upper left corner and some elements in the lower right corner of a precoding matrix are swapped.
  • the diagonal exchange at this time can be understood as: placing the X elements in the upper left corner of the precoding matrix to the lower right corner of the precoding matrix, and then placing the Y elements in the lower right corner of the precoding matrix into the upper left corner of the precoding matrix See, for example, Figure 7.
  • X may not be equal to Y.
  • the elements in the 1st and 3rd rows of a column with nonzero elements in the first or third row of the precoding matrix constitute the X elements in the upper left corner, and the precoding The elements in rows 2 and 4 in the second or fourth row of the matrix with nonzero elements make up the Y elements in the lower right corner.
  • the X / 2 elements on the left of the first row of a precoding matrix are placed on the right of the second row; the X / 2 elements on the left of the third row of the precoding matrix are placed on the fourth row
  • the right side of the second row of the precoding matrix is placed on the left side of the first row of Y / 2 elements; the right side of the fourth row of the precoding matrix is placed on the left side of the third row.
  • the element at the upper left corner of the precoding matrix is the precoding vector set of the first panel
  • the element at the lower right corner is the precoding vector set of the second panel.
  • a precoding matrix contains two sets of precoding vectors (a vector is a column of the precoding matrix), which is applied to two panels respectively. On the rows of non-zero elements of the precoding vectors in the first set of precoding vectors, the elements of the precoding vectors in the second set of precoding vectors are all zero.
  • the spatial related information of the P ports whose port numbers are even (or odd) in the precoding matrix comes from the first of the 2 SRS resources indicated by the SRI
  • the spatial related information of the P ports whose port numbers are odd (or even) is from the second of the two SRS resources indicated by the SRI; or when the number of RSs included in the spatial information parameter of the SRS resource corresponding to the SRI
  • the port-related information of the P ports whose port numbers are even (or odd) in the precoding matrix comes from the first RS included in the spatial information parameter of the SRS resource indicated by the SRI, the precoding matrix.
  • the spatial related information of the P ports whose port numbers are odd (or even) is from the second RS in the spatial information parameter of the SRS resource indicated by the SRI.
  • the number of columns containing nonzero elements corresponding to ports 0 and 2 in the precoding matrix is the number of layers Q sent by the first panel, that is, the first of the two SRS resources corresponding to the SRI or the SRI corresponding.
  • the first of the two RSs in the spatially related parameters of the SRS resource is associated with Q layers; the number of columns containing non-zero elements corresponding to ports 1 and 3 in the precoding matrix is the layer of the second panel.
  • the number W that is, the second of the two SRS resources corresponding to the SRI or the second of the two RSs in the spatial correlation parameter of the SRS resource corresponding to the SRI, is associated with the W layers. There are a total of Q + W layers. The first panel occupies the first Q and the second panel occupies the last W.
  • phase coefficients are the same or opposite.
  • the same attributes mean that they are all real or imaginary numbers; the opposite is that one attribute is real and one is imaginary.
  • the phase coefficient refers to the precoding coefficients of port 2 and port 3, that is, the values of the third and fourth rows of the precoding matrix (a row index of 0 is the first Row).
  • the third and fourth rows correspond to the phase coefficients of the two Panels, respectively. If the uplink codebook uses a codebook similar to the downlink, then the phase coefficient is
  • the DMRS port mapping is different for the transmission of the same number of layers.
  • the differences in R correspond to different DMRS port mapping tables. That is, the candidate values for port mapping are different.
  • the DMRS port mapping table does not include the case where multiple layers occupy only one DMRS CDM group.
  • Embodiment 10 is a diagrammatic representation of Embodiment 10:
  • FIG. 8A and 8B Comparing FIG. 3, if the UE has 2 panels and each panel has 4 ports, the antenna pattern is shown in FIGS. 8A and 8B.
  • codebook design such as diagonal exchange, DMRS and other solutions can still be used. But there are different details.
  • the selection of the CSR depends on the number of SRS resources corresponding to the SRI or the number R of RSs included in the spatial correlation parameters of the SRS resources corresponding to the SRI.
  • R is greater than 1
  • the corresponding CSR is a combination of multiple precoding and layer number indications.
  • the base station often uses DCI to indicate multiple TPMIs to the UE.
  • a non- The number of zero elements is the same as the number of non-zero elements in a certain column of another TPMI. Because there are too many candidates for the 4-antenna codebook, which can be further restricted, the precoding vectors corresponding to multiple TPMIs must be orthogonal.
  • the selection of the codebook for uplink transmission actually depends on the SRI notification in the DCI. Specifically, the selection of the codebook for uplink transmission actually depends on the number of SRS resources corresponding to the SRI or the number of RSs included in the spatial information parameters of the corresponding SRS resources.
  • the number of rows of the precoding matrix in the codebook depends on the number of SRS resources indicated by the SRI or the number R of RSs included in the spatial information parameter of the corresponding SRS resource.
  • R 1
  • the number of rows of all precoding matrices in the codebook is P.
  • the number of SRS resources corresponding to the SRI or the number of RSs contained in the spatial information parameters of the corresponding SRS resources is greater than 1, at this time, at least half of each column in all the precoding matrices in the codebook is zero.
  • at this time in each column of all the precoding matrices in the codebook, at least the first half of the elements are zero or the second half of the elements are zero, corresponding to FIG. 8A; optionally, at least the elements corresponding to the ports of the odd-numbered port group are all zero. Or the elements corresponding to the ports of the even-numbered port group are all zero, corresponding to FIG. 8B.
  • the number of non-zero elements included in all columns of the precoding matrix may be limited.
  • the spatially related information of the first P ports in the precoding matrix comes from the first of the two SRS resources indicated by the SRI, and the spatially related information of the next P ports comes from The second of the 2 SRS resources indicated by the SRI; or when the number of RSs included in the spatial information parameter of the SRS resource corresponding to the SRI is 2, the spatially related information of the first P ports in the precoding matrix comes from The first RS included in the spatial information parameter of the SRS resource indicated by the SRI, and the spatial related information of the last P ports in the precoding matrix comes from the RS included in the spatial information parameter of the SRS resource indicated by the SRI.
  • the second one corresponds to FIG. 8A; and corresponding to FIG.
  • the precoding matrix has a total of 2P rows, that is, a total of 2P ports.
  • the port number in the precoding matrix belongs to the P port of the even array (or odd array).
  • the spatial related information comes from the first of the two SRS resources indicated by the SRI.
  • the port number belongs to the odd array (or even array).
  • the spatial related information of the P ports comes from the second of the two SRS resources indicated by the SRI; or when the number of RSs included in the spatial information parameters of the SRS resources corresponding to the SRI is 2, the The spatial related information of the P ports whose port numbers belong to the even array (or odd array) comes from the first RS included in the spatial information parameter of the SRS resource indicated by the SRI, and the port numbers in the precoding matrix belong to the odd array ( Or even arrays) of the spatially related information of the P ports comes from the second RS included in the spatial information parameter of the SRS resource indicated by the SRI.
  • the even array refers to a group with a group index of 0, 2 and the odd array refers to a group with a group index of 1, 3.
  • the two panels of the UE respectively send data streams based on different beams.
  • the number of transmission layers is at least two.
  • the number of DMRS ports is at least two.
  • one of the precoding matrices in the codebook is a diagonal exchange of the other.
  • Diagonal swap is to swap some elements in the upper left corner and some elements in the lower right corner of a precoding matrix.
  • a precoding matrix contains two sets of precoding vectors (a vector is a column of the precoding matrix), which is applied to two panels respectively. On the rows of non-zero elements of the precoding vectors in the first set of precoding vectors, the elements of the precoding vectors in the second set of precoding vectors are all zero. For FIG.
  • the diagonal swap means that the X elements in the upper left corner of the precoding matrix are placed in the lower right corner of the precoding matrix, and then the Y elements in the lower right corner of the precoding matrix are placed. The element is placed in the upper left corner of the precoding matrix.
  • X may not be equal to Y.
  • the precoding matrix has Z rows, then the number of all elements of the first Z / 2 rows contained in the column with nonzero elements in the first Z / 2 rows of the precoding matrix is X, and the last Z of the precoding matrix is X The number of all elements of the last Z / 2 rows contained in the column with nonzero elements in the / 2 row is Y.
  • the upper left corner T1 column belongs to the even port group.
  • the X elements on the port are moved to the elements on the port belonging to the odd port group on the T1 column in the lower right corner.
  • the number of columns with non-zero elements on the ports belonging to the odd port group in the precoding matrix is T2
  • the port group index starts from 0, 0, 2 are even arrays, and 1, 3 are odd arrays.
  • the port corresponding to the row of the precoding matrix belongs to the row of the even port group (rows 0, 1, 4, 5).
  • the transformed matrix is shown in the matrix on the right of Figure 9.
  • At least one precoding matrix in the codebook described in this embodiment is a diagonal exchange of the other.
  • Embodiment 11 is a diagrammatic representation of Embodiment 11:
  • FIG. 10 is a pointing device 10 provided in this embodiment, including: a notification module 101. among them:
  • the notification module 101 is used to notify the DMRS port indication, the SRI and the transmission precoding indication to the terminal to notify the basic information
  • the basic information includes at least one of the following: DMRS port indication information, precoded codebook or precoding matrix information, CSR ; Among them, the determination of basic information depends on the value of SRI.
  • the corresponding basic information may be determined depending on the size of the R value corresponding to the SRI.
  • the R value is the number of SRS resources or the number of reference signals RS included in the spatial information parameters of the corresponding SRS resources.
  • the pointing device provided in this embodiment. Can be applied to base stations. For ease of description, the actions described below with the base station may be performed by the pointing device.
  • a combination of precoding and layer number indication corresponding to multiple UE panels may be limited. That is, in this embodiment, the base station may configure a CSR for the UE, and the codebook subset limitation is a combination of multiple precoding and layer number indications. In this way, when the R value corresponding to the SRI is greater than 1 (that is, when there are two or more SRS resources indicated), the CSR applied to multiple precoding and layer number indications is selected to correspond to multiple UE panels.
  • the combination of precoding and layer number indication limits are examples of precoding and layer number indication limits.
  • the CSR when the R value corresponding to the SRI is 1, the CSR will also be configured for it.
  • This CSR is used to limit the selection of the precoding and layer number indication when the SRI corresponds to one SRS resource. It does not involve multiple precoding. Coding and number of layers indicate the limits of the combination.
  • the base station notifies multiple precoding matrices in the DCI, and each column of each precoding matrix notified is non-zero.
  • the number of elements is the same.
  • the indicated precoding attributes of multiple panels of the UE must be the same. That is, among the multiple TPMIs indicated to the UE, the number of non-zero elements in a certain column of one TPMI is the same as the number of non-zero elements in a certain column of another TPMI.
  • the number of non-zero elements represents the transmission capability of the UE, such as Stands for non-coherent transmission, and It means full coherent transmission.
  • the precoding attributes of different panels must be the same, and CSR is not required to restrict (of course, CSR can also be used to restrict at the same time).
  • the base station may be configured with multiple sets of CSRs for the UE, and the application of the actual CSR depends on the indication of the SRI.
  • the base station may configure two sets of codebook subset restrictions for the UE through high-level signaling, one set for single-panel transmission and one set for multi-panel transmission.
  • the application of the actual codebook subset limitation depends on the number of SRS resources indicated by the SRI. Specifically, when the SRI indicated in the DCI corresponds to one SRS resource, the first CSR is used, and when the SRI indicated in the DCI corresponds to two or more SRS resources, the second CSR is used.
  • the base station may configure a set of CSRs corresponding to each SRI value. This has the highest flexibility, and the base station can even limit different codebook subsets for different panels of the UE.
  • a codebook may be redesigned for multi-Panel transmission, and the new codebook is different from the original single-panel codebook.
  • the new codebook is different from the original single-panel codebook.
  • the transmission precoding matrix is determined according to the transmission precoding instruction and the codebook corresponding to the R value.
  • the number of rows of the precoding matrix in the selected codebook is P * R; P * R indicates that there are P * R ports, and each port corresponds to the precoding matrix in order.
  • Each line of the; and P is the number of ports configured for each SRS resource.
  • the first to fourth rows correspond to ports 0-3 in turn.
  • the four ports of the two antenna panels are 0-3 in sequence. At this time, the first two rows of the precoding matrix correspond to the first SRS resource from the first. Panel, the last two lines correspond to the second SRS resource, which comes from the second panel.
  • the four ports of the two antenna panels are 0, 2, 1, and 3 in sequence.
  • the first, third, and second rows of the precoding matrix correspond to the first one.
  • the SRS resource comes from the first panel, and the second and fourth two lines correspond to the second SRS resource from the second panel.
  • At least an element having a (1-1 / R) ratio is zero. That is, when one panel sends a layer of data, other panels do not send data on that layer.
  • the first half of the ports in the precoding matrix belong to the first panel and the second half of the ports belong to the second panel, then when the number of SRS resources corresponding to the SRI or the spatial information parameters of the corresponding SRS resources When the number is greater than 1, at least the first half of the elements in each column of the precoding matrix in the codebook is zero or the second half of the elements is zero.
  • the number of non-zero elements included in each column of the precoding matrix in the codebook may be limited.
  • the P * R ports can be divided into 4 groups in order, and at least the elements corresponding to the ports of the odd-numbered port group are all zero or even bits. The elements corresponding to the ports of the port group are all zero.
  • the spatially related information of the corresponding first P ports in the precoding matrix comes from the first of the SRS resources indicated by the SRI, or from the first of the SRS resources indicated by the SRI.
  • the first RS included in the spatial information parameter; the spatial related information of the next P ports comes from the second of the SRS resource indicated by the SRI, or from the RS included in the spatial information parameter of the SRS resource indicated by the SRI. The second one.
  • the 2P ports can be sequentially divided into 4 groups; the corresponding port numbers in the precoding matrix that belong to the P ports of the even array are spatially related information from the SRI indication
  • At least one precoding matrix in the precoding matrix in the codebook is a diagonal switching matrix of another precoding matrix.
  • the diagonal swap matrix refers to: each row in the P * R row precoding matrix is divided into 4 groups in order. If a precoding matrix contains elements with even non-zero elements in the even array, the number of columns is T1, move the X elements belonging to the top left column T1 in the even array to the position of the elements on column T1 belonging to the odd array in the bottom right; if the number of non-zero elements in a precoding matrix that belongs to the odd array is T2, move the Y elements belonging to the lower right corner T2 column in the odd array to the elements on the upper left corner T2 column belonging to the even array.
  • the matrix thus obtained is the diagonal switching matrix of the precoding matrix; or,
  • the X elements in the upper left corner of the precoding matrix are placed in the lower right corner of the precoding matrix, and the Y elements in the lower right corner of the precoding matrix are placed in the upper left corner of the precoding matrix.
  • Figure 5 shows two diagonal switching matrices.
  • R> 1 when R> 1, at least two transmission layers will be sent from different UE panels. At this time, the assignment of DMRS ports is different from that of a UE panel. In order to save DMRS overhead, allocating to a UE port 0 and port 1 is a good choice. However, when R> 1, the layer 2 transmission comes from two different panels, and the time-frequency offset of these two different panels may be different, and port 0 and port 1 are no longer suitable. Because port 0 and port 1 are code-divided, in a CDM group, the time-frequency offset is different, which will cause the demodulation performance to decrease. Therefore, in an example of this embodiment, when R> 1, the number of DMRS ports indicated by the DMRS port indication information should be at least two, or the number of transport layers with one should not be included in the precoded codebook. happening.
  • the differences in R correspond to different DMRS port mapping tables. That is, the candidate values of the port mapping corresponding to different R are different.
  • the DMRS port mapping table does not include the case where multiple layers occupy only one DMRS CDM group.
  • FIG. 11 is an information determining device 11 corresponding to the pointing device shown in FIG. 10 provided for the UE side.
  • the information determining device 11 is applied to a terminal and includes a receiving determining module 111 . It should be noted that, for the convenience of description, the following description of the terminal may be performed by the information determining device.
  • the receiving and determining module 111 is configured to receive the DMRS port indication, SRI, and transmission precoding indication notified by the base station to determine basic information.
  • the basic information includes at least one of the following: DMRS port indication information, precoded codebook, or precoding matrix information. , CSR.
  • the determination of the DMRS port indication information, the information of the precoded codebook or the precoding matrix, and the basic information of the CSR should depend on the value of the SRI.
  • the UE may depend on the size of the R value corresponding to the SRI to determine the corresponding basic information.
  • the R value is the number of SRS resources or the number of reference signals RS included in the spatial information parameters of the corresponding SRS resources.
  • the CSR selected by the UE should be a CSR applied to multiple precoding and layer number indication combinations.
  • the UE may receive multiple precoding matrices notified in the DCI (the number of non-zero elements in each column of each precoding matrix notified is the same).
  • the UE may select a codebook corresponding to the R value; and further determine a transmission precoding matrix according to the transmission precoding instruction and the codebook corresponding to the R value.
  • the number of rows of the precoding matrix in the codebook selected by the UE is P * R;
  • P * R indicates that there are P * R ports, and each port is in order Corresponding to each row of the precoding matrix;
  • the P is: the number of ports configured for each SRS resource.
  • each column in the precoding matrix in the codebook may have at least a (1-1 / R) ratio of zero elements .
  • the number of non-zero elements included in each column of the precoding matrix in the codebook may be the same.
  • the number of rows of the precoding matrix in the codebook selected by the UE is P * R
  • at least the first half element or the last half element of each column in the precoding matrix in the codebook is zero.
  • the P * R ports can be divided into 4 groups in order, at least the elements corresponding to the ports of the odd-numbered port group are all zero or the elements corresponding to the ports of the even-numbered port group are all zero.
  • the spatially related information of the corresponding first P ports in the precoding matrix comes from the SRS resource indicated by the SRI
  • the first of the RS, or the first of the RS included in the spatial information parameter of the SRS resource indicated by the SRI; the spatially related information of the last P ports comes from the second of the SRS resource indicated by the SRI, or from The second RS included in the spatial information parameter of the SRS resource indicated by the SRI.
  • the 2P ports can be sequentially divided into 4 groups; the corresponding port numbers in the precoding matrix belong to
  • the spatial related information of the P ports of the even array comes from the first of the SRS resources indicated by the SRI, or from the first of the RS contained in the spatial information parameters of the SRS resources indicated by the SRI; the port numbers belong to the odd array
  • the spatial related information of the P ports comes from the second of the SRS resources indicated by the SRI or from the second of the RS included in the spatial information parameters of the SRS resources indicated by the SRI.
  • the diagonal swap matrix refers to: each row in the P * R row precoding matrix is divided into 4 groups in order. If a precoding matrix contains elements with even non-zero elements in the even array, the number is T1, move the X elements belonging to the upper left corner T1 column in the even array to the element positions on the lower right corner T1 column belonging to the odd array; T2, move the Y elements belonging to the lower right corner T2 column in the odd array to the elements on the upper left corner T2 column belonging to the even array.
  • the matrix thus obtained is the diagonal swap matrix of the precoding matrix; or
  • the X elements in the upper left corner of the precoding matrix are placed in the lower right corner of the precoding matrix, and then the Y elements in the lower right corner of the precoding matrix are placed in the upper left corner of the precoding matrix.
  • the resulting matrix is the precoding matrix Diagonal switching matrix; where X and Y are positive integers.
  • R> 1 when R> 1, at least two transmission layers will be sent from different UE panels. At this time, the assignment of DMRS ports is different from that of a UE panel. In order to save DMRS overhead, allocating to a UE port 0 and port 1 is a good choice. However, when R> 1, the layer 2 transmission comes from two different panels, and the time-frequency offset of these two different panels may be different, and port 0 and port 1 are no longer suitable. Because port 0 and port 1 are code-divided, in a CDM group, the time-frequency offset is different, which will cause the demodulation performance to decrease. Therefore, in an example of this embodiment, when R> 1, the number of DMRS ports indicated by the DMRS port indication information received by the UE should be at least 2, or the pre-encoded codebook should not include the number of transmission layers. When the number is 1.
  • the standards on the terminal side that is, the information determining device side
  • the base station side that is, the pointing device side
  • the information determining device can correspondingly determine the DMRS port instruction information.
  • the information of the precoded codebook or the precoding matrix, the CSR, etc., and then the PUSCH can be sent according to the beam or panel of the indicated SRS resource.
  • the indication device and the information determination device provided in the embodiments of the present disclosure, by notifying the DMRS port instruction, the SRI and the transmission precoding instruction to the terminal, so that the terminal can determine the basic information required to implement uplink codebook-based transmission ( (Including DMRS port indication information, pre-coded codebook or pre-coding matrix information, at least one of CSR, and the determination of these basic information depends on the value of SRI), so that the terminal can be used in a single panel according to the requirements of the base station Data transmission in the case of multiple panels. That is, the base station can implicitly notify the DMRS mapping information, CSR, precoding codebook, etc. according to the dynamic indication of the SRI, so that the terminal can effectively dynamically switch between single-beam and multi-beam, and realizes support for multi-panel transmission And flexible support for dynamic indication between single-panel transmission and multi-panel transmission.
  • uplink codebook-based transmission (Including DMRS port indication information, pre-coded codebook or pre-coding matrix information, at least one of CSR
  • Embodiment 12 is a diagrammatic representation of Embodiment 12
  • This embodiment provides a base station. As shown in FIG. 12, it includes a first processor 121, a first memory 122, and a first communication bus 123. Among them, the first communication bus 123 is used to implement the first processor 121 and The connection and communication between the first memories 122; the first processor 121 is configured to execute one or more first programs stored in the first memory 122 to implement the instruction method according to the first to tenth embodiments.
  • the terminal includes a second processor 131, a second memory 132, and a second communication bus 133.
  • the second communication bus 133 is used to implement the second The connection and communication between the processor 131 and the second memory 132; the second processor 131 is configured to execute one or more second programs stored in the second memory 132, so as to implement the information described in Embodiments 1 to 10. Determine the method.
  • This embodiment also provides a storage medium including a volatile or non-volatile memory implemented in any method or technology for storing information such as computer-readable instructions, data structures, computer program modules, or other data. Volatile, removable or non-removable media.
  • Storage media include, but are not limited to, RAM (Random Access Memory, Random Access Memory), ROM (Read-Only Memory, Read-Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory) Or other memory technology, CD-ROM (Compact Disc Read-Only Memory), digital versatile disc (DVD) or other optical disc storage, magnetic box, magnetic tape, disk storage or other magnetic storage device, or can be used Any other medium for storing the desired information and accessible by the computer.
  • Computer-executable instructions are stored in the storage medium provided in this embodiment, and the computer-executable instructions can be executed by one or more processors to implement the instruction method or the information determination method described in Embodiments 1 to 10. I will not repeat them here.
  • a communication medium typically contains computer-readable instructions, data structures, computer program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium. Therefore, this application is not limited to any specific combination of hardware and software.

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Abstract

本公开提供了一种指示方法、信息确定方法、装置、基站、终端及存储介质，将解调参考信号DMRS端口指示，探测参考信号资源指示SRI和传输预编码指示通知给终端，以通知基础信息，所述基础信息包括以下至少之一：DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，以及码本子集限制CSR；其中，所述基础信息的确定依赖于所述SRI的取值。

Description

指示方法、信息确定方法、装置、基站、终端及存储介质
本申请要求在2018年09月27日提交中国专利局、申请号为201811133472.9的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本公开涉及但不限于通信领域，具体而言，涉及但不限于一种指示方法、信息确定方法、装置、基站、终端及存储介质。
背景技术
NR(New radio，新无线技术)的上行基于码本的传输(UL codebook based transmission)方案支持2天线端口和4天线端口。对于2天线端口，如图1a所示，基站会配置在DCI(Downlink Control Information，下行控制信息)中携带2天线端口的预编码和层数指示(Precoding information and number of layers)，其中，预编码和层数指示用于指示TPMI(Transmit precoding matrix indicator，传输预编码指示)和传输的层数。由于2天线端口可能做coherent(连贯)传输，所以这2个天线端口可以认为是来自于同一个panel(面板)。对于4天线端口，如图1b所示，基站会配置在DCI中携带4天线端口的预编码和层数指示，由于4天线端口可能做coherent传输，所以这4个天线端口可以认为是来自于同一个panel。2天线端口和4天线端口的预编码码本在协议38.211中有所阐述。
但是，对于上行基于码本的传输方式在高频下也可以应用，然而用途仅仅限定于单模拟波束传输或者说是单天线面板(antenna panel)传输。而如何支持多panel传输，或者灵活支持单panel传输和多panel传输之间的动态指示并没有解决方案。
发明内容
本公开实施例提供一种指示方法、信息确定方法、装置、基站、终端及存储介质，提供一种支持多panel传输，或者灵活支持单panel传输和多panel传输之间的动态指示的方案。
本公开实施例提供了一种指示方法，包括：
通知DMRS(Demodulation Reference Signal，解调参考信号)端口指示，SRI(SRS Resource Indicator；探测参考信号资源指示)和传输预编码指示给终端，以通知基础信息，所述基础信息包括以下至少一种：
DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，CSR(codebook subset restriction，码本子集限制)；
所述基础信息的确定依赖于所述SRI的取值。
本公开实施例还提供了一种信息确定方法，包括：
接收基站通知的DMRS端口指示，SRI和传输预编码指示，以确定基础信息，所述基础信息包括以下的至少一种：
DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，CSR；
所述基础信息的确定依赖于所述SRI的取值。
本公开实施例还提供了一种指示装置，包括：通知模块；
所述通知模块用于通知DMRS端口指示，SRI和传输预编码指示给终端，以通知基础信息，所述基础信息包括以下至少一种：
DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，CSR；
所述基础信息的确定依赖于所述SRI的取值。
本公开实施例还提供了一种信息确定装置，包括：接收确定模块；
所述接收确定模块用于接收基站通知的DMRS端口指示，SRI和传输预编码指示，以确定基础信息，所述基础信息包括以下至少一种：
DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，CSR；
所述基础信息的确定依赖于所述SRI的取值。
本公开实施例还提供了一种基站，包括：第一处理器、第一存储器以及第一通信总线；
所述第一通信总线用于实现所述第一处理器和第一存储器之间的连接通信；
所述第一处理器用于执行所述第一存储器中存储的一个或者多个第一程序，以实现上述指示方法。
本公开实施例还提供了一种终端，包括：第二处理器、第二存储器以及第二通信总线；
所述第二通信总线用于实现所述第二处理器和第二存储器之间的连接通信；
所述第二处理器用于执行所述第二存储器中存储的一个或者多个第二程序，以实现上述信息确定方法。
本公开实施例还提供一种存储介质，所述计算机可读存储介质存储有一个或者多个计算机程序，所述一个或者多个计算机程序可被一个或者多个处理器执行，以实现上述指示方法，或实现上述信息确定方法。
本公开实施例提供的指示方法、信息确定方法、装置、基站、终端及存储介质，通过通知DMRS端口指示，SRI和传输预编码指示给终端，从而使得终端可以确定出用于实现上行基于码本的传输所需的基础信息(包括DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，CSR中的至少一种，而这些基础信息的确定依赖于SRI的取值)，从而使得终端可以按照基站的要求在单panel或多panel情况下实现数据传输。即，基站可以根据SRI的动态指示来隐含的通知DMRS映射信息，CSR，预编码码本等，从而使得终端可以有效的在单波束和多波束间动态切换，实现了对多panel传输的支持，以及灵活支持单panel传输和多panel传输之间的动态指示。
附图说明
图1a为相关技术提供的一种2天线端口示意图；
图1b为相关技术提供的一种4天线端口示意图；
图2为本公开实施例提供的一种基站和终端之间的交互示意图；
图3为本公开实施例提供的一种2天线面板4天线端口结构示意图；
图4为本公开实施例提供的另一种2天线面板4天线端口结构示意图；
图5为本公开实施例提供的一种对角交换示意图；
图6为本公开实施例提供的又一种对角交换示意图；
图7为本公开实施例提供的又一种对角交换示意图；
图8A为本公开实施例提供的一种2天线面板8天线端口结构示意图；
图8B为本公开实施例提供的另一种2天线面板8天线端口结构示意图；
图9为本公开实施例提供的一种对角交换示意图；
图10为本公开实施例十一提供的一种指示装置结构示意图；
图11为本公开实施例十一提供的一种信息确定装置结构示意图；
图12为本公开实施例十二提供的一种基站的结构示意图；
图13为本公开实施例十二提供的一种终端的结构示意图。
具体实施方式
下面参考附图更详细地描述本公开构思的各个实施例。但是，本公开构思可被以很多不同的形式具体实施，并且不应被理解为仅限于所示出的实施例。相反，提供这些实施例以使本公开透彻和完整，并且将向本领域技术人员全面地传达本公开构思的范围。贯穿上面描述和附图，相同的参考数字和标记代表相同或者类似的元素。
应当理解的是，尽管这里可能使用术语第一、第二等来描述各种元件或操作，但是这些元件或操作不应被这些术语限制。这些术语只被用来将一个元件或操作与另一个加以区分。例如，第一特征可以被称为第二特征，并且类似地，第二特征可以被称为第一特征而不偏离本公开的教导。
这里使用的术语仅仅是为了描述特定实施例，并非旨在限制本公开构思。如这里所使用的，单数形式“一”、“一个”和“该”预期也包括复数形式，除非上下文清楚地另有指示。还应当理解的是，术语“包含”或“包括”在本说明书中被使用时，规定了存在所陈述的特征、区域、部分、步骤、操作、元件，和/或部件，但是不排除存在或者添加一个或更多个其他的特征、区域、部分、步骤、操作、元件、部件，和/或其组。
除非另外定义，否则这里使用的所有术语(包括技术和科学术语)具有和本公开所属技术领域的技术人员通常理解的相同的含义。还应当理解的是，例如在常用词典中定义的那些的术语应该被解释为具有与其在相关技术和/或本公开的上下文中的含义相符的含义，并且将不会以理想化或者过于形式化的意义解释，除非这里明确地如此定义。
下面通过具体实施方式结合附图对本公开实施例作进一步详细说明。
实施例一：
参见图2所示，图2为本公开实施例一提供基站和终端之间的交互示意图。其中，S201实质为基站侧的指示方法，包括：
S201：通知DMRS端口指示，SRI和传输预编码指示给终端。
在实际应用中，当UE(终端)有多个天线面板且每个天线面板有多个天线端口时，由于不同天线面板一般的射频链路是独立的，UE的不同面板发射的模拟波束可以不一样，且多个天线面板可以同时发送参考信号或者数据。
在本实施例中，基站可以通过RRC(Radio Resource Control，无线资源控制)信令配置一个SRS(Sounding Reference Signal，探测参考信号)资源集合(resource set)给一个UE，用于基于码本(codebook based)上行传输，且这个SRS资源集合中可包含多个SRS资源，每个SRS资源可以对应一个UE的天线面板，且 每个SRS资源可以配置一个单独的空间相关信息参数(SRS-SpatialRelationInfo)，代表UE将要发送该SRS资源使用的波束。在UE发送了这个SRS资源集合后，基站就需要通过下行控制信息格式(DCI format)0_1来调度PUSCH(Physical UplinkShared Channel，物理上行共享信道)的传输了。在调度PUSCH时，基站可以指示SRI来代表SRS的资源索引，这样UE在发送PUSCH时就需要按照指示的SRS资源的波束或者Panel来发送PUSCH。同时，基站需要指示TPMI，用于与SRS资源对应的panel里的多个端口的预编码操作。
因此，在本实施例中，基站可以通知DMRS端口指示，SRI和传输预编码指示给终端，以通知终端基础信息，基础信息包括以下至少一种：DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，CSR。
但是，需要说明的是，本实施例中DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，CSR等基础信息的确定应当依赖于SRI的取值。
具体的，本实施例中可以依赖于SRI对应的R值的大小来确定相应的基础信息。其中，R值为SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的参考信号RS的个数。
在本实施例中，可以完全独立的在DCI中通知给UE多个独立的预编码和层数指示。但是这样做所带来的物理层信令开销太大了，而且UE的复杂度会大大提高。为了降低DCI的开销，可以对多个UE面板对应的预编码和层数指示的结合进行限制。即在本实施例中基站可以为UE配置码本子集限制，该码本子集限制是应用于多个预编码和层数指示时的结合。这样，在SRI对应的R值大于1时(即指示的SRS资源有两个或两个以上时)，即选择应用于多个预编码和层数指示结合的CSR来对多个UE面板对应的预编码和层数指示的结合进行限制。
这里需要说明的是，对于SRI对应的R值为1时，也会为其配置CSR，该CSR用于限制SRI对应1个SRS resource时对于预编码和层数指示的选取，不涉及多个预编码和层数指示结合的限制。
此外，为了降低UE复杂度和CSR的开销，在本实施例中可以直接规定当R>1时，基站在DCI中通知多个预编码矩阵，且通知的各预编码矩阵的每一列的非零元素的个数相同。这样使得UE的多个panel的被指示的预编码属性必须相同。即指示给UE的多个TPMI中，一个TPMI的某一列的非零元素的个数和另外一个TPMI的某一列的非零元素的个数相同。需要理解的是，在预编码矩阵中，非零元素的个数就代表了UE的传输能力，比如
Figure PCTCN2019108575-appb-000001
就代表非连贯 (non-coherent)传输，而
Figure PCTCN2019108575-appb-000002
就就代表完全连贯(full coherent)传输。这样规定UE的多个Panel要么都是coherent传输，要么都是non-coherent传输。有了这样的规定，不同panel的预编码属性就必须相同了，就可以不需要CSR来限制了(当然，也可以同时采用CSR来限制)。
在本实施例中，基站可以配置给UE多套CSR，实际CSR的应用依赖于SRI的指示。例如，基站可以通过高层信令配置给UE两套码本子集限制，1套应用于单panel传输，一套应用于多panel传输。而实际码本子集限制的应用依赖于SRI的指示的SRS资源的个数。具体的，当DCI中指示的SRI对应1个SRS resource时，就使用第一套CSR，而当DCI中指示的SRI对应2个或2个以上SRS resource时，就使用第二套CSR。
可选择的，基站可以为每一个SRI的取值对应配置一套CSR。这样的灵活性最高，基站甚至可以对UE的不同panel进行不同的码本子集限制。
在本实施例中，为了更进一步的降低UE复杂度，可以针对多Panel传输时重新设计码本，而新码本跟原来单panel的码本有所区别。这样，在SRI对应的R大于1时，选择对应的多Panel传输时的码本即可。在本实施例中，甚至可以针对不同的R值分别设计不同的码本。即在本实施例中，在R大于1时，即会选择与R值对应的码本，进而根据传输预编码指示和R值对应的码本来确定传输预编码矩阵。
在本实施例中，当R>1时，选择的码本中的预编码矩阵的行数为P*R；其中，P*R表征存在P*R个端口，各端口按顺序对应预编码矩阵的每一行；而P为每个SRS资源配置的端口数。例如，以一个4(2*2)行的预编码矩阵而言，第一至四行就依次对应端口0-3。以图3所示的2天线面板结构而言，两个天线面板的4个端口依次为0-3，此时预编码矩阵的前两行对应的就是第一个SRS资源，来自于第一个panel，后两行对应的就是第二个SRS资源，来自于第二个panel。而以图4所示的2天线面板结构而言，两个天线面板的4个端口依次为0、2、1、3，此时预编码矩阵的第一、三两行对应的就是第一个SRS资源，来自于第一个panel，第二、四两行对应的就是第二个SRS资源，来自于第二个panel。
此外，在本实施例的一种示例中，码本中的预编码矩阵中的每一列，至少存在(1-1/R)比例的元素为零。也即，在一个panel发送一层数据时，其他panel在该层上不发送数据。
此外，如果预编码矩阵中前一半端口属于第一个panel，后一半端口属于第二个panel，那么当SRI对应的SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的RS的个数大于1时，此时码本中所有的预编码矩阵中的每一列，至少前一半元素是零或者后一半元素是零。
在本实施例一种示例中，为了限制预编码矩阵的候选个数，可以限制码本中的预编码矩阵每一列中包含的非零元素的个数相同。
此外，在本实施例一种示例中，在码本的预编码矩阵中，可以将P*R端口按顺序等分为4组，至少奇数位端口组的端口对应的元素全是零或者偶数位端口组的端口对应的元素全是零。
在本实施例一种示例中，当R＝2时，预编码矩阵中对应的前P个端口的空间相关信息来自于SRI指示的SRS资源的第1个，或者来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第1个；后P个端口的空间相关信息来自于SRI指示的SRS资源的第2个，或者来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第2个。
在本实施例一种示例中，当R＝2时，可以将2P个端口按顺序分为4组；预编码矩阵中对应的端口号属于偶数组的P个端口的空间相关信息来自于SRI指示的SRS资源的第1个，或者来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第1个；端口号属于奇数组的P个端口的空间相关信息来自于SRI指示的SRS资源的第2个或者来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第2个。
在本实施例一种示例中，当R＝2时，码本中的预编码矩阵至少存在一个预编码矩阵是另外一个预编码矩阵的对角交换矩阵。
需要说明的是，对角交换矩阵是指：将P*R行预编码矩阵中，各行按顺序分为4组，如果一个预编码矩阵中，属于偶数组的元素有非零元素的列数为T1，将属于偶数组中的左上角T1列的X个元素移到右下角属于奇数组的T1列上元素位置上；如果一个预编码矩阵中属于奇数组的元素有非零元素的列数为T2，将属于奇数组中的右下角T2列的Y个元素移到左上角属于偶数组的T2列上元素位置上，这样得到的矩阵即为该预编码矩阵的对角交换矩阵；或者，将预编码矩阵的左上角的X个元素放置到预编码矩阵的右下角，然后将预编码矩阵的右下角的Y个元素放置到预编码矩阵的左上角，这样得到的矩阵即为该预编码矩阵的对角交换矩阵；其中，X和Y为正整数。例如图5所示的即为两个对角交换矩阵。
在本实施例一种示例中，在R>1，且预编码矩阵中每列的非零元素的个数都为P时，预编码矩阵的每一列的非零元素组成的向量都相互正交。
值得注意的是，在本实施例一种示例中，在R＝2时，在每一列有一半的元素为非零元素的预编码矩阵中，矩阵左上角和矩阵右下角的元素所代表的相位系数的属性相同或者相反。需要说明的是，属性相同是指：元素都为实数或者 都为虚数；属性相反是指：一个元素为实数而另一个元素为虚数；相位系数是指：补偿在第二个极化方向上的相位。
需要理解的是，在实际应用中，当R>1时，至少会有2个传输层(layer)从不同的UE panel发出来。此时DMRS端口的分配有别于一个UE panel的情况。为了节省DMRS开销，分配给一个UE端口0和端口1是一个很好的选择。然而当R>1时，2层传输来自于2个不同的panel，这2个不同的panel的时频偏可能不一样，端口0和端口1就不再适合了。因为端口0和端口1是码分的，在一个码分复用(Code Division Multiplexing，CDM)组内，时频偏不一样会导致解调性能下降。因此，在本实施例一种示例中，在R>1时，DMRS端口指示信息指示的DMRS的端口数应当至少为2，或者预编码的码本中应当不包括传输层的个数为1的情况。
此外，在R>1时，多个layer至少占据2个DMRS的码分复用组(CDM group)。而R＝1时，没有这个限制。
此外，在本实施例中还可以设定不同的R对应的DMRS端口映射关系不同。即R的不同对应了不同的DMRS端口映射表格。即不同的R对应的端口映射的候选值不同。当R>1时，对应的K个layer的传输的DMRS端口映射表格不同于R＝1时对应的K个layer的传输的DMRS的端口映射表格。一般当R>1时，DMRS的端口映射表格中不包括多个layer只占据1个DMRS的CDM group的情况。
相应的，参见图2终端侧所示，其实质是与基站侧的指示方法对应的信息确定方法，包括：
S202：接收基站通知的DMRS端口指示，SRI和传输预编码指示，以确定基础信息，基础信息包括以下至少一种：DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，CSR。
需要说明的是，本实施例中UE对DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，CSR等基础信息的确定应当依赖于SRI的取值。
具体的，本实施例中UE可以依赖于SRI对应的R值的大小来确定相应的基础信息。其中，R值为SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的参考信号RS的个数。
在本实施例的一种示例中，当R>1时，UE选择的CSR应当为应用于多个预编码和层数指示结合的CSR。
在本实施例一种示例中，当R>1时，UE可以接收DCI中通知的多个预编码矩阵(通知的各预编码矩阵的每一列的非零元素的个数相同)。
在本实施例一种示例中，当R>1时，UE可以选择该R值对应的码本；进而根据传输预编码指示和R值对应的码本来确定传输预编码矩阵。
在本实施例一种示例中，当R>1时，UE选择的码本中的预编码矩阵的行数为P*R；其中，P*R表征存在P*R个端口，各端口按顺序对应预编码矩阵的每一行；所述P为：每个SRS资源配置的端口数。
在上述UE选择的码本中的预编码矩阵的行数为P*R的示例中，码本中的预编码矩阵中的每一列，可以至少存在(1-1/R)比例的元素为零。此外，在上述示例中，码本中的预编码矩阵每一列中包含的非零元素的个数可以相同。
在上述UE选择的码本中的预编码矩阵的行数为P*R的示例中，码本中的预编码矩阵中，每一列至少前一半元素或后一半元素为零。或者，在码本的预编码矩阵中，可以将P*R端口按顺序等分为4组，至少奇数位端口组的端口对应的元素全是零或者偶数位端口组的端口对应的元素全是零。
在上述UE选择的码本中的预编码矩阵的行数为P*R的示例中，当R＝2时，预编码矩阵中对应的前P个端口的空间相关信息来自于SRI指示的SRS资源的第1个，或者来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第1个；后P个端口的空间相关信息来自于SRI指示的SRS资源的第2个，或者来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第2个。
在上述UE选择的码本中的预编码矩阵的行数为P*R的示例中，当R＝2时，可以将2P个端口按顺序分为4组；预编码矩阵中对应的端口号属于偶数组的P个端口的空间相关信息来自于SRI指示的SRS资源的第1个，或者来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第1个；端口号属于奇数组的P个端口的空间相关信息来自于SRI指示的SRS资源的第2个或者来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第2个。
在上述UE选择的码本中的预编码矩阵的行数为P*R的示例中，当R＝2时，码本中的预编码矩阵至少存在一个预编码矩阵是另外一个预编码矩阵的对角交换矩阵。
需要说明的是，对角交换矩阵是指：将P*R行预编码矩阵中，各行按顺序分为4组，如果一个预编码矩阵中，属于偶数组的元素有非零元素的列数为T1，将属于偶数组中的左上角T1列的X个元素移到右下角属于奇数组的T1列上元素位置上；如果一个预编码矩阵中属于奇数组的元素有非零元素的列数为T2，将属于奇数组中的右下角T2列的Y个元素移到左上角属于偶数组的T2列上元素位置上，这样得到的矩阵即为该预编码矩阵的对角交换矩阵；或者，将预编码矩阵的左上角的X个元素放置到预编码矩阵的右下角，然后将预编码矩阵的 右下角的Y个元素放置到预编码矩阵的左上角，这样得到的矩阵即为该预编码矩阵的对角交换矩阵；其中，X和Y为正整数。
在本实施例一种示例中，在R>1，且预编码矩阵中每列的非零元素的个数都为P时，预编码矩阵的每一列的非零元素组成的向量都相互正交。
值得注意的是，在本实施例一种示例中，在R＝2时，在每一列有一半的元素为非零元素的预编码矩阵中，矩阵左上角和矩阵右下角的元素所代表的相位系数的属性相同或者相反。需要说明的是，属性相同是指：元素都为实数或者都为虚数；属性相反是指：一个元素为实数而另一个元素为虚数；相位系数是指：补偿在第二个极化方向上的相位。
需要理解的是，在实际应用中，当R>1时，至少会有2个传输层从不同的UE panel发出来。此时DMRS端口的分配有别于一个UE panel的情况。为了节省DMRS开销，分配给一个UE端口0和端口1是一个很好的选择。然而当R>1时，2层传输来自于2个不同的panel，这2个不同的panel的时频偏可能不一样，端口0和端口1就不再适合了。因为端口0和端口1是码分的，在一个CDM组内，时频偏不一样会导致解调性能下降。因此，在本实施例一种示例中，在R>1时，UE接收到的DMRS端口指示信息指示的DMRS的端口数应当至少为2，或者预编码的码本中应当不包括传输层的个数为1的情况。
此外，在R>1时，多个layer至少占据2个DMRS的CDM group。而R＝1时，没有这个限制。此外，在本实施例中还可以设定不同的R对应的DMRS端口映射关系不同。即R的不同对应了不同的DMRS端口映射表格。
事实上，终端侧与基站侧的标准是完全对照的，终端根据基站侧发送来的各个指示，即可以对应的确定出DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，CSR等，进而可以按照指示的SRS resource的波束或者Panel来发送PUSCH。
根据本公开实施例提供的指示方法及信息确定方法，通过通知DMRS端口指示，SRI和传输预编码指示给终端，从而使得终端可以确定出用于实现上行基于码本的传输所需的基础信息(包括DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，CSR中的至少一种，而这些基础信息的确定依赖于SRI的取值)，从而使得终端可以按照基站的要求在单panel或多panel情况下实现数据传输。即，基站可以根据SRI的动态指示来隐含的通知DMRS映射信息，CSR，预编码码本等，从而使得终端可以有效的在单波束和多波束间动态切换，实现了对多panel传输的支持，以及灵活支持单panel传输和多panel传输之间的动态指示。
实施例二：
当UE有多个天线面板且每个天线面板有多个天线端口时，由于不同天线面板一般的射频链路是独立的，UE的不同面板发射的模拟波束可以不一样，且多个天线面板可以同时发送参考信号或者数据。基站可以通过RRC信令配置一个SRS资源集合给一个UE，用于codebook based上行传输，且这个SRS resource set中可包含多个SRS resources，每个SRS resource可以对应一个UE的天线面板，且每个SRS resource可以配置一个单独的空间相关信息参数，代表UE将要发送该SRS resource使用的波束。在UE发送了这个SRS resource set后，基站就需要通过DCI format 0_1来调度PUSCH的传输了。在调度PUSCH时，基站可以指示SRI来代表SRS的resource索引，这样UE在发送PUSCH时就需要按照指示的SRS resource的波束或者Panel来发送PUSCH。同时，基站需要指示TPMI，用于与SRS resource对应的panel里的多个端口的预编码操作。
比如，UE有2个天线面板，每个天线面板有2个天线端口，那么如图3所示。如果基站指示UE用2个天线面板同时传输PUSCH，那么实际上UE的天线端口数是4个。一种直观的方案是利用相关技术中的4天线的码本即可，然而由于2个天线面板之间是不能做相位补偿的，即不能做coherent传输，那么相关技术中的4天线码本并不适用。
由于UE的2个panel的传输是比较独立的，所以基站可以指示给UE两个独立的预编码和层数指示，而这2个独立的预编码都基于2天线的码本。如表1-1.1和1-1.2分别列举了2天线情况下1层数据传输(1 layer)和2层数据传输(2 layers)时的码本。对于每个panel，基站都需要在DCI中指示预编码和层的信息，如表1-1.3所示，即每个panel需要4比特(bits)来通知预编码和层的信息。
表1-1.1
Figure PCTCN2019108575-appb-000003
表1-1.2
Figure PCTCN2019108575-appb-000004
表1-1.3
索引 码本子集情况
0 1 layer：TPMI＝0
1 1 layer：TPMI＝1
2 2 layers：TPMI＝0
3 1 layer：TPMI＝2
4 1 layer：TPMI＝3
5 1 layer：TPMI＝4
6 1 layer：TPMI＝5
7 2 layers：TPMI＝1
8 2 layers：TPMI＝2
9-15 保留
然而，完全独立的在DCI中通知给UE两个独立的预编码和层数指示所带来的物理层信令开销太大了，即8bits，而且UE的复杂度会大大提高，因为UE需要考虑任意2个TPMI的结合。为了降低DCI的开销，可以对多个UE panel对应的预编码和层数指示的结合进行限制。换句话说，基站通过高层信令配置给UE一个码本子集限制，该码本子集限制是应用于多个预编码和层数指示时的结合，即基站利用CSR来告诉用户在基站用DCI通知的多个预编码和层数指示时，对于一个预编码和层数指示和另一个预编码和层数指示是不可能同时被基站通知的，此时2个panel对应的这2个预编码和层数指示的结合是无效的。
比如UE有2个panel，基站利用81bits的CSR来通知用户的第一个panel的预编码和层数指示与第二个panel的预编码和层数指示的结合是否有效。这是因为第一个panel的预编码和层数指示需要9个索引，第二个panel的预编码和层数指示也需要9个索引，两个panel的独立的预编码和层数指示的结合就是81 种状态。如表1-1.4所示，CSR的bit总共有81bits，取值为0的话，就表示2个预编码和层数指示的信息是无效的，比如表中第一行表示，CSR中第1bit为0，即第一个panel是1 layer，TPMI＝0，而且第二个panel是1 layer，TPMI＝0的这种组合是无效的。
表1-1.4
Figure PCTCN2019108575-appb-000005
在DCI中指示多个预编码和层数指示时，只需要考虑有效的预编码和层数指示结合，即DCI的开销依赖于有效的多个预编码和层数指示的结合的个数即可。如果CSR中bit值为1的个数为16，那么就只需要用DCI中的4bit来从16个有效的预编码和层数指示结合中挑选1个即可。此时，基站在DCI中通知的是2个预编码和层数指示结合的索引，一个索引代表2个预编码和层数指示。
为了进一步降低UE复杂度和CSR的bits开销，可以直接规定UE的多个 panel的被指示的预编码属性必须相同。即指示给UE的多个TPMI中，一个TPMI的某一列的非零元素的个数和另外一个TPMI的某一列的非零元素的个数相同。非零元素的个数就代表了UE的传输能力，比如
Figure PCTCN2019108575-appb-000006
就代表non-coherent传输，而
Figure PCTCN2019108575-appb-000007
就代表full coherent传输。这样规定UE的多个Panel要么都是coherent传输，要么都是non-coherent传输。有了这样的规定，不同panel的TPMI属性就必须相同了，就不需要CSR的信令来通知了。
如图3所示的天线面板，当2个panel都用于数据传输时，实际上是4个端口，那么最终通知的2个TPMI合成的预编码矩阵应该是4行。比如第1个panel的预编码和层数指示是1 layer：TPMI＝0，第2个panel的预编码和层数指示是1 layer：TPMI＝1，那么实际最终的预编码矩阵应该是
Figure PCTCN2019108575-appb-000008
预编码矩阵的第1行和第2行应用于第1个panel，即端口0和端口1；第3行和第4行应用于第2个panel，即端口3和端口4。
实施例三：
如实施例2所示，基站可以通过RRC信令配置一个SRS资源集合给一个UE，用于codebook based上行传输，且这个SRS resource set中可包含多个SRS resources，每个SRS resource可以对应一个UE的天线面板，且每个SRS resource可以配置一个单独的空间相关信息参数，代表UE将要发送该SRS resource使用的波束。在UE发送了这个SRS resource set后，基站就需要通过DCI format 0_1来调度PUSCH的传输了。在调度PUSCH时，基站可以指示SRI来代表SRS的resource索引，这样UE在发送PUSCH时就需要按照指示的SRS resource的波束或者Panel来发送PUSCH。
为了支持多panel传输和单panel传输之间的动态切换，基站可以在DCI中利用SRI来指示1个SRS resource或者多个SRS resources，比如2个。1个SRS resource对应单panel传输，多个SRS resource对应多panel传输，每个resource配置2端口。比如2bits SRI的值如表1-2.1，假设基站通过RRC信令配置给UE用于codebook based传输的SRS resource set中包含了2个resources，分别为resource 0和resource1。
表1-2.1
SRI索引值 SRS资源索引
0 0
1 1
2 0，1
3 保留
如果DCI中指示的SRI的值对应的是1个SRS resource，比如SRI＝0或者SRI＝1，那么就是单panel传输，此时CSR的作用就是限制某些预编码和层数指示；而如果DCI中指示的SRI的值对应的是2个SRS resource，比如SRI＝2，那么就是2panel传输，此时CSR的作用就是限制某些预编码和层数指示的结合，如实施例2中所述，此时的码本子集限制是应用于多个预编码和层数指示时的结合。所以，为了提高码本子集限制灵活性，对于UL codebook based transmission，基站通过高层信令配置给UE多套码本子集限制，实际码本子集限制的应用依赖于SRI的指示。进一步的，基站通过高层信令配置给UE两套码本子集限制，1套应用于单panel传输，一套应用于多panel传输。而实际码本子集限制的应用依赖于SRI指示的SRS资源的个数。具体的一个例子，基站通过高层信令配置给UE两套CSR，当DCI中指示的SRI对应1个SRS resource时，就使用第一套CSR，而当DCI中指示的SRI对应2个SRS resource时，就使用第二套CSR。
可选择的，基站可通过高层信令配置给UE多套码本子集限制，每套对应一个SRI的取值。这样的灵活性最高，基站甚至可以对UE的不同panel进行不同的码本子集限制。
实施例四：
对比实施例三，可选择的，通过RRC信令配置的SRS资源集合中的某些SRS资源的空间相关信息参数可以包含多个RS resources或者某些SRS资源的空间信息参数是多个，这些SRS资源就相当于配置了多个波束，即对应了多个panel。所以，基站通过高层信令配置给UE多套码本子集限制，实际码本子集限制的应用依赖于SRI的指示，当DCI中指示的SRI对应的一个SRS资源中的空间相关信息参数包含1个RS(参考信号)或者该SRS资源的空间信息参数是1个时，用高层配置的一套CSR，称之为CSR1；而当DCI中指示的SRI对应的一个SRS资源中的空间相关信息参数可以包含多个RS或者该SRS资源的空间 信息参数是多个时，就用高层配置的另外一套CSR，称之为CSR2。CSR1与CSR2可以独立配置，分别应用于单panel传输和两panel传输。换句话说，SRI对应的SRS资源的个数不同或者对应的SRS资源的空间信息参数里所包含的RS的个数不同时，对应的CSR不同。具体的，CSR2的作用就是限制多个预编码和层数指示的结合，用于多panel传输的。
总之，CSR的应用依赖于SRI的指示。进一步地，CSR的选择依赖于SRI对应的SRS资源个数或者SRI对应的SRS资源的空间相关参数里包含的RS的个数R。当R大于1时，对应的CSR是应用于多个预编码和层数指示时的结合，此时基站往往用DCI指示给UE的多个TPMI，为了降低复杂度，一个TPMI的每一列的非零元素的个数和另外一个TPMI的每一列的非零元素的个数相同。
当SRI对应的SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的RS的个数R大于1时，对应的CSR的元素可能很多，所以可以采用RRC信令加媒体接入控制(Medium Access Control，MAC)控制单元(Control Element，CE)的方式来进行CSR的执行。
具体的，RRC信令从A1个预编码和层数指示的结合中挑选A2个预编码和层数指示的结合，然后MAC CE从A2个预编码和层数指示的结合中再挑选出A3个预编码和层数指示的结合，最终DCI是从A3个预编码和层数指示的结合中挑选1个预编码和层数指示的结合，即DCI的开销依赖于A3。
可选择地，RRC信令单独对多个TPMI进行码本子集限制(而不是进行多个TPMI结合的限制)，然后MAC CE再对RRC限制后的多个有效TPMI的结合进行挑选。最后再由DCI从MAC CE挑选的有效的多个TPMI的结合中选择一个TPMI的结合。DCI的开销依赖于MAC CE挑选的有效TPMI的结合的个数。
实施例五：
如图3所示。如果基站指示UE用2个天线面板同时传输PUSCH，那么实际上UE的天线端口数是4个。一种直观的方案是利用相关技术中的4天线的码本即可，然而由于2个天线面板之间是不能做相位补偿的，即不能做coherent传输，那么相关技术中的4天线码本并不适用。
由于两个UE panel的传输是比较独立的，所以基站可以指示给UE两个独立的预编码和层数指示，而这2个独立的预编码都基于2天线的码本。然而，这样独立的指示2个两天线预编码和层数指示的方案大大增加了DCI开销。
按照实施例二的方案，利用CSR的方案来限制两个预编码和层数指示的结 合。这种方案将控制DCI开销的任务交给了基站。但是这样可能仍然满足不了UE端低复杂度的要求。因为UE在设计时要有能力支持2个Panel的所有预编码的结合。为了更进一步的降低UE复杂度，可以针对多Panel传输时重新设计码本，即新码本跟原来单panel的码本有所区别。
为了支持多panel传输和单panel传输之间的动态切换，基站可以在DCI中利用SRI来指示1个SRS resource或者多个SRS resources，分别对应单panel传输或者多panel传输；或者基站可以利用SRI对应的SRS资源中配置的空间相关信息参数是包含1个RS还是多个RS，分别对应单panel传输或者多panel传输。其中，这个RS可以是SSB(Single Side Band，单边带)，CSI-RS(Channel state information reference signal，信道测量参考信号)，SRS。从中可以看出，对于图3的例子，每个SRS resource的端口个数应该配置成2。当DCI通知的SRI对应了1个SRS resource，且该SRS resource的空间相关信息参数中包含1个RS，那么就是单panel传输，所用的码本就是单panel的码本，可以标示为codeboook1；而当DCI通知的SRI对应了多个SRS resources，或者SRI对应的1个SRS resource的空间相关信息参数中包含多个RS(比如多个SSB索引，或者多个CSI-RS resource索引，或者多个SRS resource索引)，那么就是多panel传输，所有的码本就是多panel的码本，可以标示为codeboook2。由于单panel和多Panel传输的性质不同，码本就应该不同，即码本(codebook)1不同于codebook2。所以，上行传输的码本的选择实际上依赖于DCI中的SRI的通知。具体的，上行传输的码本的选择实际上依赖于SRI对应的SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的RS的个数。即SRI对应的SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的RS的个数不同时，上行传输所用的码本不同。换句话说，码本的选择依赖于SRI的指示而动态改变。
实施例六：
如图3所示，当2个panel都用于数据传输时，实际上是4个端口，那么最终通知的2个TPMI合成的预编码矩阵应该是4行。最终的预编码矩阵的第1行和第2行应用于第1个panel的2个端口，即端口0和端口1；第3行和第4行应用于第2个panel的两个端口，即端口3和端口4。比如第1个panel的预编码和层数指示是1 layer：[1 0]T，第2个panel的预编码和层数指示是1 layer：[0 1]T，那么实际最终的预编码矩阵应该是
Figure PCTCN2019108575-appb-000009
假设用于codebook based上行传输的SRS resource set下的每个resource配置的端口数是P，那么当SRI对应的SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的RS的个数R大于1时，就是多Panel传输，此时对应的码本中的预编码矩阵的行数就是P*R，即总端口数就是P*R。对于图3的例子，P＝2，R＝2时预编码矩阵就是4行。
此时可以看出，由于2个panel之间不能进行coherent传输，所以当多panel传输时，预编码矩阵中的每一列中的元素，最少有一半元素的值是零元素。由于上行传输的码本的选择实际上依赖于DCI中的SRI的通知，具体地说，当SRI对应的SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的RS的个数大于1时，此时码本中所有的预编码矩阵中的每一列，最少有一半元素是零。如果当R>2时，那么最少有(1-1/R)比例的元素是零。也就是说，在一个panel发送一层数据时，其他panel在该层上不发送数据。
如果天线端口的编号按照图3来进行，即前一半端口属于第一个panel，后一半端口属于第二个panel，那么具体的，就可以说是：当SRI对应的SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的RS的个数大于1时，此时码本中所有的预编码矩阵中的每一列，至少前一半元素是零或者后一半元素是零。这是因为对于panel1，占用的是前两个端口，即后两个端口对于Panel1来说没有发送任何东西，即发送的是零元素；而对于panel2，占用的是后两个端口，即前两个端口对于Panel 2来说没有发送任何东西，即发送的是零元素。按照这样的对应关系，前两个端口(端口0和端口1)来自于Panel1，即对应预编码矩阵的前两行，而后两个端口(端口2和端口3)来自于Panel2，即对应预编码矩阵的后两行，当SRI对应的SRS资源的个数为2时，那么端口0和端口1就对应SRI指示的2个SRS资源的第1个，且端口0和端口1的空间相关信息来源于SRI指示的2个SRS资源的第1个；端口2和端口3就对应SRI指示的2个SRS资源的第2个，且端口2和端口3的空间相关信息来源于SRI指示的2个SRS资源的第2个。或者当SRI对应的SRS资源的空间信息参数里所包含的RS的个数为2时，那么端口0和端口1就对应SRI指示的SRS资源的空间信息参数里所包含的RS的第1个，且端口0和端口1的空间相关信息来源于SRI指示的SRS资源的空间信息参数里所包含的RS的第1个；端口2和端口3就对应SRI指示的SRS资源的空间信息参数里所包含的RS的第2个，且端口2和端口3的空间相关信息来源于SRI指示的SRS资源的空间信息参数里所包含的RS的第2个。
换而言之，当SRI对应的SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的RS的个数R为2时，端口0和端口1，以及端口2和端口3的发送波束分别来自于SRI指示的2个SRS资源或者SRI指示的1个SRS资源的 空间信息参数里包含的2个RS。而当SRI对应的SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的RS的个数R为1时，预编码矩阵可能只有2行，即只有2个端口，此时这2个端口的空间信息参数来源于SRI对应的SRS资源。此时为了简单起见，无论是哪个panel发出的这2个端口，都可以标示为端口0和端口1。
概括的说，当SRI对应的SRS资源的个数为2时，预编码矩阵中的前P个端口的空间相关信息来自于SRI指示的2个SRS资源的第1个，后P个端口的空间相关信息自于SRI指示的2个SRS资源的第2个；或者说当SRI对应的SRS资源的空间信息参数里所包含的RS的个数为2时，预编码矩阵中的前P个端口的空间相关信息来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第1个，预编码矩阵中的后P个端口的空间相关信息来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第2个。
所以，码本中的预编码矩阵的行数是依赖于SRI指示的SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的RS的个数R。假设每个SRS资源的端口个数为P，当R＝1时，对应的预编码矩阵或者码本中的所有预编码矩阵的行数都是P；而当R＝2时，对应的预编码矩阵或者码本中的所有预编码矩阵的行数都是2P。比如每个SRS资源的端口个数为2，当R＝1时，对应的预编码矩阵或者码本中的所有预编码矩阵的行数都是2；而当R＝2时，对应的预编码矩阵或者码本中的所有预编码矩阵的行数都是4。即预编码矩阵的行数等于P*R。
同理，对于每个Panel有4个端口的情况下，即每个SRS资源的端口个数为4，当R＝1时，对应的预编码矩阵或者码本中的所有预编码矩阵的行数都是4；而当R＝2时，对应的预编码矩阵或者码本中的所有预编码矩阵的行数都是8。
实施例七：
基于前面各实施例的分析，对于一个用于codebook based传输的SRS resource set，它包含了N个SRS resources，其中N>＝1。如果每个resource的端口个数都为P，那么就代表一个UE panel有P个端口，例如P＝2。基站利用DCI中的SRI来指示挑选的SRS资源，SRI对应的SRS资源的个数或者SRI对应的1个SRS资源的空间信息参数里所包含的RS的个数R，如果R＝1，则预编码的码本就是一个2天线端口的码本，而如果R＝2，则预编码的码本就是一个4天线端口的码本。很明显的，SRI的不同值会导致码本的不同。当R>1时，4天线的码本中的预编码矩阵是由2个panel的2个两天线预编码矩阵组合而成，如果2个panel的两天线预编码矩阵独立来自于相关技术中的2天线码本，那么此时 DCI中的TPMI域的开销(overhead)就很大。为了限制在R>1的情况下码本中预编码矩阵的个数而不失灵活性，就需要有一些特殊的设计了。本实施例主要讨论R＝2时码本的设计。
当R＝2时，UE的2个panel都分别基于不同的波束单独发送数据流，此时传输的层数就最少是2层。此时DMRS的端口数也就最少是2。
7.1：假设一个UE最大支持2个layer
此时UE的两个panel各发1层数据流，即各发1个DMRS端口：1+1
为了降低预编码矩阵的个数，可以参考表1-6.1，NR的2端口2层的预编码矩阵如下：
表1-6.1 2 layer 2端口码本
Figure PCTCN2019108575-appb-000010
当R＝2时，预编码矩阵的第一列来自于第一个panel，第二列来自于第二个panel。则需要将上述矩阵变换为4端口的预编码矩阵，即预编码矩阵需要4行，其大小为4×2。那么第一个panel对应的预编码矩阵的列的后两行需要插入零元素，即在端口2和端口3上是零；第二个panel对应的预编码矩阵的列的前两行需要插入零元素，即在端口0和端口1上是零。转换后的码本可以参见下表1-6.2。本文为了简单，都没有给出预编码矩阵的幅度。
表1-6.2基于2个panel的2 layer 4端口码本
Figure PCTCN2019108575-appb-000011
然而，这样的简化有一些弊端。对于第一个panel，预编码向量只能是[1 0]，[1 1]，[1 j]，不能是[0 1]，[1 -1]，[1 -j]；同理对于第二个panel，预编码向量只能是[0 1]，[1 -1]，[1 -j]，不能是[1 0]，[1 1]，[1 j]。由于2个panel有独立行，这样的限制会带来性能损失。
为了扩展码本的灵活性，当R＝2时，码本中的某1个预编码矩阵是另外1个的对角交换。如图5所示，对角交换的意思就是说，将一个预编码矩阵的左上角的若干元素和右下角的若干元素对换。可以理解为，预编码矩阵的左上角的元素就是第一个panel的预编码向量集合，而右下角的元素就是第二个panel的预编码向量集合。做完对角交换，就是将2个panel的预编码向量进行了交换。当R＝2时，一个预编码矩阵就包含了2个预编码向量集合(一个向量就是预编 码矩阵的一列)，分别应用于2个panel。在第一个预编码向量集合中的预编码向量的非零元素的行上，第二个预编码向量集合中的预编码向量的元素都是0。
如下表1-6.3所示，下面一行的预编码矩阵就是上面的对角交换矩阵。这样做的好处就是，对于一个Panel，不同的预编码向量都可以尝试到，弥补了矩阵的不足，而没有增加太多的预编码矩阵个数。
表1-6.3
Figure PCTCN2019108575-appb-000012
7.2：假设一个UE最大支持4个layer
7.2.1、对于总共2层传输，UE的两个panel各发1层数据流，即各发1个DMRS端口：1+1
此时跟上述最大2个layer情况相同。
7.2.2、对于总共3层传输，UE的两个panel分别发生2数据层和1层数据，或者分别发送1层数据和2层数据：2+1或者1+2
此时，当R＝2时，可以预定义使得预编码矩阵的第一列和第二列来自于第一个panel，第三列来自于第二个panel。由于预编码矩阵的第一列和第二列是对应第一个UE panel，那么此两列的后两行元素应该是零，因为第一个panel只占用了端口0和端口1。由于预编码矩阵的第三列是对应第2个UE panel，那么此列的前两行元素应该是零，因为第2个panel只占用了端口2和端口3。为了限制预编码矩阵的候选个数，可以限制UE的2个Panel发送的预编码向量的属性都相同，即层数为3的每个预编码矩阵中，所有列中包含的非零元素的个数相同。虽然限制了一些调度灵活性，但是也比较符合实际的信道和UE天线属性。根据此属性得到的预编码码本如表1-6.4。
表1-6.4
Figure PCTCN2019108575-appb-000013
然而，始终限制第一个UE panel发送2个数据层不符合实际的信道条件。为了扩展码本的灵活性，当R＝2时，码本中的某1个预编码矩阵是另外1个的对角交换。如图6所示，对角交换的意思就是说，将一个预编码矩阵的左上角的若干元素和右下角的若干元素对换。此时layer个数是3，即将左上角的4个元素和右下角的2个元素进行位置交换。换句话说，对角交换的意思就是将预编码矩阵的左上角的X个元素放置到预编码矩阵的右下角，然后将预编码矩阵的右下角的Y个元素放置到预编码矩阵的左上角。X可以不等于Y。假设预编码矩阵有Z行，那么预编码矩阵的前Z/2行中有非零元素的列中所包含的前Z/2行的所有元素的个数就是X，而预编码矩阵的后Z/2行中有非零元素的列中所包含的后Z/2行的所有元素的个数就是Y。
对表1-6.4的所有预编码矩阵进行对角交换，就会衍生出另外10个预编码矩阵，所以codebook中3层传输的情况总共会有20个预编码矩阵，其中每2个是对角交换矩阵。如下表1-6.5所示，每一列中，第2行就是第1行的预编码矩阵的对角交换；第4行就是第3行的预编码矩阵的对角交换；第6行就是第5行的预编码矩阵的对角交换。
表1-6.5
Figure PCTCN2019108575-appb-000014
此时，根据具体的预编码矩阵就可以判断出第一个Panel对应传输几个layer，第二个panel对应传输几个layer。具体地，预编码矩阵中端口0和端口1对应的包含非零元素的列数就是第一个panel发出的layer的个数Q，即SRI对应的2个SRS resource中的第一个或者SRI对应的SRS资源的空间相关参数里的2个RS的第一个，与Q个layer关联；预编码矩阵中端口2和端口3对应的包含非零元素的列数就是第2个panel发出的layer的个数W，即SRI对应的2个SRS resource中的第2个或者SRI对应的SRS资源的空间相关参数里的2个RS的第2个，与W个layer关联。总共Q+W个layer，第一个panel占了前Q个，第二个panel占了后W个。
然而20个预编码矩阵似乎有些多，为了进一步限制码本中预编码矩阵的个数。可以有如下规定：
当每个panel内的2个端口都是coherent传输时，即对于码本中的预编码矩阵中的每一列都有一半的元素是非零元素的这些预编码矩阵，矩阵左上角和矩阵右下角的相位系数的属性相同或者相反。属性相同是指都是实数或者都是虚数；属性相反是指一个是实数一个是虚数。所谓相位系数就是指补偿在第二个极化方向上的相位。类似于下行信道系数(参见协议38.214)。对于P＝2，预编 码矩阵中行索引(从0开始)为奇数的预编码的取值。对于P＝2(每个SRS资源配置2端口)，相位系数就是指端口1和端口3的预编码系数，即预编码矩阵的第二行和第四行的取值(行索引为0就是第一行)。第2行和第4行分别对应2个Panel的相位系数。
比如，对于码本中的预编码矩阵中的每一列都有一半的元素是非零元素的这些预编码矩阵，规定矩阵左上角和矩阵右下角的相位系数的属性相同，即端口1和端口3对应的系数要么都是实数，要么都是虚数，不能一个是实数而另外一个是虚数。比如表1-6.5中的预编码矩阵
Figure PCTCN2019108575-appb-000015
就不符合此规定。这样去除表1-6.5中不符合此规定的预编码矩阵，码本中的预编码矩阵就如表1-6.6所示，只有12个。这样做的好处是减少了DCI的开销，同时保证了两个panel在不同极化方向上的相位补偿是一致的。如果UE的两个Panel的信道属性差距不大，那么该方法就能很好的应用而不会带来太大的性能损失。
表1-6.6
Figure PCTCN2019108575-appb-000016
对于码本中的预编码矩阵中的每一列都有一半的元素是非零元素的这些预 编码矩阵，如果规定矩阵左上角和矩阵右下角的相位系数的属性相反，即端口1和端口3对应的系数一个是实数而另外一个是虚数。比如表1-6.5中的预编码矩阵
Figure PCTCN2019108575-appb-000017
就不符合此规定。这样去除表1-6.5中不符合此规定的预编码矩阵，码本中的预编码矩阵就如表1-6.7所示，只有12个。这样做的好处是减少了DCI的开销，同时保证了两个panel在不同极化方向上的相位补偿不一致，在某些情况下会有分集增益。如果UE的两个Panel的信道属性差距很大，那么该方法就能很好的应用而不会带来太大的性能损失。
表1-6.7
Figure PCTCN2019108575-appb-000018
7.2.3、对于总共4层传输，UE的两个panel分别发生2层数据：2+2
类似于3层传输，一些规则也可以用于4层传输。
比如，当R＝2时，码本中的某1个预编码矩阵是另外1个的对角交换。如下表1-6.8的两个矩阵。
表1-6.7
Figure PCTCN2019108575-appb-000019
又比如，对于码本中的预编码矩阵中的每一列都有一半的元素是非零元素的这些预编码矩阵，矩阵左上角和矩阵右下角的相位系数的属性相同或者相反。比如，如果规定相反，那么预编码矩阵
Figure PCTCN2019108575-appb-000020
不符合规定，应该从4层传输的码本中剔除。
实施例八：
以上实施例二至七是基于图3的进行说明的。如果2个UE panel的情况下，4个天线的端口映射如图4所示的话，以上有些预编码矩阵的方法就有些不同了。此时，第1个panel上发送的是端口0和端口2，映射在预编码矩阵的第一行和第三行；第2个panel上发送的是端口1和端口3，映射在预编码矩阵的第2行和第4行。
此时，当SRI对应的SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的RS的个数R大于1时，比如R＝2，码本中所有的预编码矩阵中的每一列仍然至少有一半元素为0，且是奇数位元素全是零或者偶数位元素全是零，如下表1-7.1所示。另外，表中，a，b，c，d，e，f仍然有可能等于0。
表1-7.1端口序号基于图4
Figure PCTCN2019108575-appb-000021
此时，为了增加预编码的灵活性，当R＝2时，码本中的某1个预编码矩阵是另外1个的对角交换。即将一个预编码矩阵的左上角的若干元素和右下角的若干元素对换。此时的对角交换可以理解为，将预编码矩阵的左上角的X个元素放置到预编码矩阵的右下角，然后将预编码矩阵的右下角的Y个元素放置到预编码矩阵的左上角，例如参见图7所示。X可以不等于Y。假设预编码矩阵有Z行，那么预编码矩阵的第1行或者第3行有非零元素的列中的第1行和第3行的元素就组成了左上角的X个元素，而预编码矩阵的第2或者第4行有非零 元素的列中的第2行和第4行的元素就组成了右下角的Y个元素。具体的来说，就是将一个预编码矩阵第一行左边的X/2个元素放在了第二行的右边；将预编码矩阵第三行左边的X/2个元素放在了第四行的右边；将预编码矩阵的第二行右边的Y/2个元素放在了第一行左边；将预编码矩阵的第四行右边的Y/2个元素放在了第三行左边。如图7所示。此时，可以理解为，预编码矩阵的左上角的元素就是第一个panel的预编码向量集合，而右下角的元素就是第二个panel的预编码向量集合。做完对角交换，就是将2个panel的预编码向量进行了交换。当R＝2时，一个预编码矩阵就包含了2个预编码向量集合(一个向量就是预编码矩阵的一列)，分别应用于2个panel。在第一个预编码向量集合中的预编码向量的非零元素的行上，第二个预编码向量集合中的预编码向量的元素都是0。
此时，当SRI对应的SRS资源的个数为2时，预编码矩阵中的端口号为偶数(或者奇数)的P个端口的空间相关信息来自于SRI指示的2个SRS资源的第1个，端口号为奇数(或者偶数)的P个端口的空间相关信息自于SRI指示的2个SRS资源的第2个；或者说当SRI对应的SRS资源的空间信息参数里所包含的RS的个数为2时，预编码矩阵中的端口号为偶数(或者奇数)的P个端口的空间相关信息来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第1个，预编码矩阵中的端口号为奇数(或者偶数)的P个端口的空间相关信息来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第2个。
此时，根据具体的预编码矩阵就可以判断出第一个Panel对应传输几个layer，第二个panel对应传输几个layer。具体地，预编码矩阵中端口0和端口2对应的包含非零元素的列数就是第一个panel发出的layer的个数Q，即SRI对应的2个SRS resource中的第一个或者SRI对应的SRS资源的空间相关参数里的2个RS的第一个，与Q个layer关联；预编码矩阵中端口1和端口3对应的包含非零元素的列数就是第2个panel发出的layer的个数W，即SRI对应的2个SRS resource中的第2个或者SRI对应的SRS资源的空间相关参数里的2个RS的第2个，与W个layer关联。总共Q+W个layer，第一个panel占了前Q个，第二个panel占了后W个。
当每个panel内的2个端口都是coherent传输时，即对于码本中的预编码矩阵中的每一列都有一半的元素是非零元素的这些预编码矩阵，矩阵左上角和矩阵右下角的相位系数的属性相同或者相反。属性相同是指都是实数或者都是虚数；属性相反是指一个是实数一个是虚数。所谓相位系数就是指补偿在第二个极化方向上的相位。类似于下行信道系数的(参见协议38.214)。对于P＝2，预编码矩阵中行索引(从0开始)为后一半的预编码的取值。对于P＝2(每个SRS资源配置2端口)相位系数就是指端口2和端口3的预编码系数，即预编码矩阵的第三行和第四行的取值(行索引为0就是第一行)。第3行和第4行分别对 应2个Panel的相位系数。如果上行码本采用与下行类似的码本，那么相位系数就是指
Figure PCTCN2019108575-appb-000022
实施例九：
根据前面实施例二至八所述，当R>1时，至少会有2个layer从不同的UE panel发出来。此时DMRS端口的分配有别于一个UE panel的情况。比如单panel的2层传输，DMRS端口分配情况如下表1-8.1所示。
表1-8.1
值 没有数据的DMRS CDM组的数量 DMRS端口
0 1 0，1
1 2 0，1
2 2 2，3
3 2 0，2
... ... ...
为了节省DMRS开销，分配给一个UE端口0和端口1是一个很好的选择。然而当R>1时，2层传输来自于2个不同的panel，这2个不同的panel的时频偏可能不一样，端口0和端口1就不再适合了。因为端口0和端口1是码分的，在一个CDM组内，时频偏不一样会导致解调性能下降。
所以说，当SRI对应的SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的RS的个数R不同时，对于相同层数的传输，DMRS的端口映射不同。
具体地，当R>1时，多个layer至少占据2个DMRS的CDM group。而R＝1时，没有这个限制。
可选择地，R的不同对应了不同的DMRS端口映射表格。即端口映射的候选值不同。当R>1时，对应的K个layer的传输的DMRS端口映射表格不同于R＝1时对应的K个layer的传输的DMRS的端口映射表格。一般当R>1时，DMRS的端口映射表格中不包括多个layer只占据1个DMRS的CDM group的情况。
实施例十：
对比图3，如果UE有2个panel，每个panel有4个端口，天线图样如图8A和图8B所示。上述对于CSR，码本设计，比如对角交换等，DMRS等方案仍然可以用。但存在细节不同。
当多TPMI(可能是多个TPMI的结合)在DCI中指示时，CSR的选择依赖于SRI对应的SRS资源个数或者SRI对应的SRS资源的空间相关参数里包含的RS的个数R。当R大于1时，对应的CSR是应用于多个预编码和层数指示时的结合，此时基站往往用DCI指示给UE的多个TPMI，为了降低复杂度，一个TPMI的某一列的非零元素的个数和另外一个TPMI的某一列的非零元素的个数相同。由于4天线码本候选个数太多，可以进一步限制，多个TPMI对应的预编码向量必须正交。
而如果是将多个panel的预编码传输不按照多TPMI指示的方式，而是按照码本的设计的方式来进行，那么上行传输的码本的选择实际上依赖于DCI中的SRI的通知。具体的，上行传输的码本的选择实际上依赖于SRI对应的SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的RS的个数。
假设用于codebook based上行传输的SRS resource set下的每个resource配置的端口数是P，那么当SRI对应的SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的RS的个数R大于1时，就是多Panel传输，此时对应的码本中的预编码矩阵的行数就是P*R。
所以，码本中的预编码矩阵的行数是依赖于SRI指示的SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的RS的个数R。当R＝1时，码本中的所有预编码矩阵的行数就是P。
当SRI对应的SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的RS的个数大于1时，此时码本中所有的预编码矩阵中的每一列，最少有一半元素是零。此时码本中所有的预编码矩阵中的每一列，至少前一半元素是零或者后一半元素是零，对应图8A；可选择的是，至少奇数位端口组的端口对应的元素全是零或者偶数位端口组的端口对应的元素全是零，对应图8B。进一步的，可以进行限制为预编码矩阵所有列中包含的非零元素的个数相同。
当SRI对应的SRS资源的个数为2时，预编码矩阵中的前P个端口的空间相关信息来自于SRI指示的2个SRS资源的第1个，后P个端口的空间相关信息来自于SRI指示的2个SRS资源的第2个；或者说当SRI对应的SRS资源的空间信息参数里所包含的RS的个数为2时，预编码矩阵中的前P个端口的空间相关信息来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第1个，预编码矩阵中的后P个端口的空间相关信息来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第2个，对应图8A；而对应图8B，当SRI对应的 SRS资源的个数为2时，预编码矩阵总共2P行，即共有2P个端口。将2P个端口按顺序分为4组，即端口0，..(P/2-1)为第1组，组索引为0；(P/2)，..(P-1)为第2组，组索引为1；P，..(3P/2-1)为第3组，组索引为2；(3P/2)，..(2P)为第4组，组索引为3。因为P＝4，那么端口0和端口1为第一组，端口2和端口3为第二组，端口4和端口5为第三组，端口6和端口7为第四组。此时预编码矩阵中的端口号属于偶数组(或者奇数组)的P个端口的空间相关信息来自于SRI指示的2个SRS资源的第1个，端口号属于奇数组(或者偶数组)的P个端口的空间相关信息来自于SRI指示的2个SRS资源的第2个；或者说当SRI对应的SRS资源的空间信息参数里所包含的RS的个数为2时，预编码矩阵中的端口号属于偶数组(或者奇数组)的P个端口的空间相关信息来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第1个，预编码矩阵中的端口号属于奇数组(或者偶数组)的P个端口的空间相关信息来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第2个。偶数组是指组索引为0，2的组，奇数组是指组索引为1，3的组。
当R＝2时，UE的2个panel都分别基于不同的波束单独发送数据流，此时传输的层数就最少是2层。此时DMRS的端口数也就最少是2。
当R＝2时，码本中的某1个预编码矩阵是另外1个的对角交换。对角交换就是将一个预编码矩阵的左上角的若干元素和右下角的若干元素对换。一个预编码矩阵包含了2个预编码向量集合(一个向量就是预编码矩阵的一列)，分别应用于2个panel。在第一个预编码向量集合中的预编码向量的非零元素的行上，第二个预编码向量集合中的预编码向量的元素都是0。对于图8A，类似于实施例七中所述，对角交换的意思就是将预编码矩阵的左上角的X个元素放置到预编码矩阵的右下角，然后将预编码矩阵的右下角的Y个元素放置到预编码矩阵的左上角。X可以不等于Y。假设预编码矩阵有Z行，那么预编码矩阵的前Z/2行中有非零元素的列中所包含的前Z/2行的所有元素的个数就是X，而预编码矩阵的后Z/2行中有非零元素的列中所包含的后Z/2行的所有元素的个数就是Y。
对于图8B，将2P个端口按顺序分为4组后，如果预编码矩阵中属于偶数端口组的端口上的元素有非零元素的列数为T1，将左上角T1列中属于偶数端口组的端口上的X个元素移到右下角T1列上属于奇数端口组的端口上的元素。反之，如果预编码矩阵中属于奇数端口组的端口上的元素有非零元素的列数为T2，将右下角T2列中属于奇数端口组的端口上的元素移到左上角T2列上属于偶数端口组的端口上的元素。端口组索引从0开始，0，2就是偶数组，1，3就是奇数组。
如图9所示，左边的预编码矩阵中，预编码矩阵的行对应的端口属于偶数端口组的行(行0，1，4，5)有非零元素的列就是第一列，即T1＝1那么第1列中行0，1，4，5的元素就组成了左上角的X个元素，然后将这X个元素就移到最右下角的1列中属于奇数端口组的元素上，即将第一列行0，1，4，5的元素分别移到最后1列行2，3，6，7上。反过来，左边预编码矩阵中属于奇数端口组的端口上的元素有非零元素的列数为T2，即在端口2，3，6，7上有非零元素的列数为右边2列，T2＝2，那么后2列中行2，3，6，7上的元素就组成了右下角的Y个元素，将这Y个元素分别移到前两列行0，1，4，5的位置上。这样变换后的矩阵就如图9右边的矩阵所示。
值得注意的是，本实施例所述的码本中至少有一个预编码矩阵是另一个的对角交换。
由于在R>1的时候，码本的候选集太多，因此可以进一步对Panel内coherent传输时的码本做进一步规定：
当R>1时，例如R＝2，且预编码矩阵中每列的非零元素都是P时，那么该预编码矩阵的每一列的非零元素组成的向量都相互正交。如图9中，向量[a0 a1 a2 a3]，[b0 b1 b2 b3]，[c0 c1 c2 c3]都是正交向量。
实施例十一：
本实施例提供了一种指示装置。参见图10，图10为本实施例提供的一种指示装置10，包括：通知模块101。其中：
通知模块101用于通知DMRS端口指示，SRI和传输预编码指示给终端，以通知基础信息，基础信息包括以下至少一种：DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，CSR；其中，基础信息的确定依赖于SRI的取值。
具体的，本实施例中可以依赖于SRI对应的R值的大小来确定相应的基础信息。其中，R值为SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的参考信号RS的个数。
需要说明的是，本实施例中所提供的指示装置。可以应用于基站上。为了便于描述，以下以基站进行描述的动作可以为由指示装置执行。
在本实施例中，可以完全独立的在DCI中通知给UE多个独立的预编码和层数指示。但是这样做所带来的物理层信令开销太大了，而且UE的复杂度会大大提高。为了降低DCI的开销，可以对多个UE面板对应的预编码和层数指示的结合进行限制。即在本实施例中基站可以为UE配置CSR，该码本子集限制 是应用于多个预编码和层数指示时的结合。这样，在SRI对应的R值大于1时(即指示的SRS资源有两个或两个以上时)，即选择应用于多个预编码和层数指示结合的CSR来对多个UE面板对应的预编码和层数指示的结合进行限制。
这里需要说明的是，对于SRI对应的R值为1时，也会为其配置CSR，该CSR用于限制SRI对应1个SRS resource时对于预编码和层数指示的选取，不涉及多个预编码和层数指示结合的限制。
此外，为了降低UE复杂度和CSR的开销，在本实施例中可以直接规定当R>1时，基站在DCI中通知多个预编码矩阵，且通知的各预编码矩阵的每一列的非零元素的个数相同。这样使得UE的多个panel的被指示的预编码属性必须相同。即指示给UE的多个TPMI中，一个TPMI的某一列的非零元素的个数和另外一个TPMI的某一列的非零元素的个数相同。需要理解的是，在预编码矩阵中，非零元素的个数就代表了UE的传输能力，比如
Figure PCTCN2019108575-appb-000023
就代表non-coherent传输，而
Figure PCTCN2019108575-appb-000024
就代表full coherent传输。这样规定UE的多个Panel要么都是coherent传输，要么都是non-coherent传输。有了这样的规定，不同panel的预编码属性就必须相同了，就可以不需要CSR来限制了(当然，也可以同时采用CSR来限制)。
在本实施例中，基站可以配置给UE多套CSR，实际CSR的应用依赖于SRI的指示。例如，基站可以通过高层信令配置给UE两套码本子集限制，1套应用于单panel传输，一套应用于多panel传输。而实际码本子集限制的应用依赖于SRI的指示的SRS资源的个数。具体的，当DCI中指示的SRI对应1个SRS resource时，就使用第一套CSR，而当DCI中指示的SRI对应2个或2个以上SRS resource时，就使用第二套CSR。
可选择的，基站可以为每一个SRI的取值对应配置一套CSR。这样的灵活性最高，基站甚至可以对UE的不同panel进行不同的码本子集限制。
在本实施例中，为了更进一步的降低UE复杂度，可以针对多Panel传输时重新设计码本，而新码本跟原来单panel的码本有所区别。这样，在SRI对应的R大于1时，选择对应的多Panel传输时的码本即可。在本实施例中，甚至可以针对不同的R值分别设计不同的码本。即在本实施例中，在R大于1时，即会选择与R值对应的码本，进而根据传输预编码指示和R值对应的码本来确定传输预编码矩阵。
在本实施例中，当R>1时，选择的码本中的预编码矩阵的行数为P*R；其中，P*R表征存在P*R个端口，各端口按顺序对应预编码矩阵的每一行；而P为每个SRS资源配置的端口数。例如，以一个4(2*2)行的预编码矩阵而言，第一至四行就依次对应端口0-3。以图3所示的2天线面板结构而言，两个天线 面板的4个端口依次为0-3，此时预编码矩阵的前两行对应的就是第一个SRS资源，来自于第一个panel，后两行对应的就是第二个SRS资源，来自于第二个panel。而以图4所示的2天线面板结构而言，两个天线面板的4各端口依次为0、2、1、3，此时预编码矩阵的第一、三两行对应的就是第一个SRS资源，来自于第一个panel，第二、四两行对应的就是第二个SRS资源，来自于第二个panel。
此外，在本实施例的一种示例中，码本中的预编码矩阵中的每一列，至少存在(1-1/R)比例的元素为零。也即，在一个panel发送一层数据时，其他panel在该层上不发送数据。
此外，如果预编码矩阵中前一半端口属于第一个panel，后一半端口属于第二个panel，那么当SRI对应的SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的RS的个数大于1时，此时码本中所有的预编码矩阵中的每一列，至少前一半元素是零或者后一半元素是零。
在本实施例一种示例中，为了限制预编码矩阵的候选个数，可以限制码本中的预编码矩阵每一列中包含的非零元素的个数相同。
此外，在本实施例一种示例中，在码本的预编码矩阵中，可以将P*R端口按顺序等分为4组，至少奇数位端口组的端口对应的元素全是零或者偶数位端口组的端口对应的元素全是零。
在本实施例一种示例中，当R＝2时，预编码矩阵中对应的前P个端口的空间相关信息来自于SRI指示的SRS资源的第1个，或者来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第1个；后P个端口的空间相关信息来自于SRI指示的SRS资源的第2个，或者来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第2个。
在本实施例一种示例中，当R＝2时，可以将2P个端口按顺序分为4组；预编码矩阵中对应的端口号属于偶数组的P个端口的空间相关信息来自于SRI指示的SRS资源的第1个，或者来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第1个；端口号属于奇数组的P个端口的空间相关信息来自于SRI指示的SRS资源的第2个或者来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第2个。
在本实施例一种示例中，当R＝2时，码本中的预编码矩阵至少存在一个预编码矩阵是另外一个预编码矩阵的对角交换矩阵。
需要说明的是，对角交换矩阵是指：将P*R行预编码矩阵中，各行按顺序分为4组，如果一个预编码矩阵中，属于偶数组的元素有非零元素的列数为T1，将属于偶数组中的左上角T1列的X个元素移到右下角属于奇数组的T1列上元 素位置上；如果一个预编码矩阵中属于奇数组的元素有非零元素的列数为T2，将属于奇数组中的右下角T2列的Y个元素移到左上角属于偶数组的T2列上元素位置上，这样得到的矩阵即为该预编码矩阵的对角交换矩阵；或者，将预编码矩阵的左上角的X个元素放置到预编码矩阵的右下角，然后将预编码矩阵的右下角的Y个元素放置到预编码矩阵的左上角，这样得到的矩阵即为该预编码矩阵的对角交换矩阵；其中，X和Y为正整数。例如图5所示的即为两个对角交换矩阵。
在本实施例一种示例中，在R>1，且预编码矩阵中每列的非零元素的个数都为P时，预编码矩阵的每一列的非零元素组成的向量都相互正交。
值得注意的是，在本实施例一种示例中，在R＝2时，在每一列有一半的元素为非零元素的预编码矩阵中，矩阵左上角和矩阵右下角的元素所代表的相位系数的属性相同或者相反。需要说明的是，属性相同是指：元素都为实数或者都为虚数；属性相反是指：一个元素为实数而另一个元素为虚数；相位系数是指：补偿在第二个极化方向上的相位。
需要理解的是，在实际应用中，当R>1时，至少会有2个传输层从不同的UE panel发出来。此时DMRS端口的分配有别于一个UE panel的情况。为了节省DMRS开销，分配给一个UE端口0和端口1是一个很好的选择。然而当R>1时，2层传输来自于2个不同的panel，这2个不同的panel的时频偏可能不一样，端口0和端口1就不再适合了。因为端口0和端口1是码分的，在一个CDM组内，时频偏不一样会导致解调性能下降。因此，在本实施例一种示例中，在R>1时，DMRS端口指示信息指示的DMRS的端口数应当至少为2，或者预编码的码本中应当不包括传输层的个数为1的情况。
此外，在R>1时，多个layer至少占据2个DMRS的CDM group。而R＝1时，没有这个限制。
此外，在本实施例中还可以设定不同的R对应的DMRS端口映射关系不同。即R的不同对应了不同的DMRS端口映射表格。即不同的R对应的端口映射的候选值不同。当R>1时，对应的K个layer的传输的DMRS端口映射表格不同于R＝1时对应的K个layer的传输的DMRS的端口映射表格。一般当R>1时，DMRS的端口映射表格中不包括多个layer只占据1个DMRS的CDM group的情况。
相应的，参见图11所示，图11为对应为UE侧提供的一种与图10所示的指示装置对应的信息确定装置11，该信息确定装置11应用于终端上，包括接收确定模块111。需要说明的是，为了便于描述，以下对终端进行描述的动作可以为由信息确定装置执行。
接收确定模块111用于接收基站通知的DMRS端口指示，SRI和传输预编码指示，以确定基础信息，基础信息包括以下至少一种：DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，CSR。
需要说明的是，本实施例中UE对DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，CSR等基础信息的确定应当依赖于SRI的取值。
具体的，本实施例中UE可以依赖于SRI对应的R值的大小来确定相应的基础信息。其中，R值为SRS资源的个数或者对应的SRS资源的空间信息参数里所包含的参考信号RS的个数。
在本实施例的一种示例中，当R>1时，UE选择的CSR应当为应用于多个预编码和层数指示结合的CSR。
在本实施例一种示例中，当R>1时，UE可以接收DCI中通知的多个预编码矩阵(通知的各预编码矩阵的每一列的非零元素的个数相同)。
在本实施例一种示例中，当R>1时，UE可以选择该R值对应的码本；进而根据传输预编码指示和R值对应的码本来确定传输预编码矩阵。
在本实施例一种示例中，当R>1时，UE选择的码本中的预编码矩阵的行数为P*R；其中，P*R表征存在P*R个端口，各端口按顺序对应预编码矩阵的每一行；所述P为：每个SRS资源配置的端口数。
在上述UE选择的码本中的预编码矩阵的行数为P*R的示例中，码本中的预编码矩阵中的每一列，可以至少存在(1-1/R)比例的元素为零。此外，在上述示例中，码本中的预编码矩阵每一列中包含的非零元素的个数可以相同。
在上述UE选择的码本中的预编码矩阵的行数为P*R的示例中，码本中的预编码矩阵中，每一列至少前一半元素或后一半元素为零。或者，在码本的预编码矩阵中，可以将P*R端口按顺序等分为4组，至少奇数位端口组的端口对应的元素全是零或者偶数位端口组的端口对应的元素全是零。
在上述UE选择的码本中的预编码矩阵的行数为P*R的示例中，当R＝2时，预编码矩阵中对应的前P个端口的空间相关信息来自于SRI指示的SRS资源的第1个，或者来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第1个；后P个端口的空间相关信息来自于SRI指示的SRS资源的第2个，或者来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第2个。
在上述UE选择的码本中的预编码矩阵的行数为P*R的示例中，当R＝2时，可以将2P个端口按顺序分为4组；预编码矩阵中对应的端口号属于偶数组的P个端口的空间相关信息来自于SRI指示的SRS资源的第1个，或者来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第1个；端口号属于奇数组 的P个端口的空间相关信息来自于SRI指示的SRS资源的第2个或者来自于SRI指示的SRS资源的空间信息参数里所包含的RS的第2个。
在上述UE选择的码本中的预编码矩阵的行数为P*R的示例中，当R＝2时，码本中的预编码矩阵至少存在一个预编码矩阵是另外一个预编码矩阵的对角交换矩阵。
需要说明的是，对角交换矩阵是指：将P*R行预编码矩阵中，各行按顺序分为4组，如果一个预编码矩阵中，属于偶数组的元素有非零元素的列数为T1，将属于偶数组中的左上角T1列的X个元素移到右下角属于奇数组的T1列上元素位置上；如果一个预编码矩阵中属于奇数组的元素有非零元素的列数为T2，将属于奇数组中的右下角T2列的Y个元素移到左上角属于偶数组的T2列上元素位置上，这样得到的矩阵即为该预编码矩阵的对角交换矩阵；或者，将预编码矩阵的左上角的X个元素放置到预编码矩阵的右下角，然后将预编码矩阵的右下角的Y个元素放置到预编码矩阵的左上角，这样得到的矩阵即为该预编码矩阵的对角交换矩阵；其中，X和Y为正整数。
在本实施例一种示例中，在R>1，且预编码矩阵中每列的非零元素的个数都为P时，预编码矩阵的每一列的非零元素组成的向量都相互正交。
值得注意的是，在本实施例一种示例中，在R＝2时，在每一列有一半的元素为非零元素的预编码矩阵中，矩阵左上角和矩阵右下角的元素所代表的相位系数的属性相同或者相反。需要说明的是，属性相同是指：元素都为实数或者都为虚数；属性相反是指：一个元素为实数而另一个元素为虚数；相位系数是指：补偿在第二个极化方向上的相位。
需要理解的是，在实际应用中，当R>1时，至少会有2个传输层从不同的UE panel发出来。此时DMRS端口的分配有别于一个UE panel的情况。为了节省DMRS开销，分配给一个UE端口0和端口1是一个很好的选择。然而当R>1时，2层传输来自于2个不同的panel，这2个不同的panel的时频偏可能不一样，端口0和端口1就不再适合了。因为端口0和端口1是码分的，在一个CDM组内，时频偏不一样会导致解调性能下降。因此，在本实施例一种示例中，在R>1时，UE接收到的DMRS端口指示信息指示的DMRS的端口数应当至少为2，或者预编码的码本中应当不包括传输层的个数为1的情况。
此外，在R>1时，多个layer至少占据2个DMRS的CDM group。而R＝1时，没有这个限制。此外，在本实施例中还可以设定不同的R对应的DMRS端口映射关系不同。即R的不同对应了不同的DMRS端口映射表格。
事实上，终端侧(即信息确定装置侧)与基站侧(即指示装置侧)的标准 是完全对照的，信息确定装置根据指示装置发送来的各个指示，即可以对应的确定出DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，CSR等，进而可以按照指示的SRS resource的波束或者Panel来发送PUSCH。
根据本公开实施例提供的指示装置和信息确定装置，通过通知DMRS端口指示，SRI和传输预编码指示给终端，从而使得终端可以确定出用于实现上行基于码本的传输所需的基础信息(包括DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，CSR中的至少一种，而这些基础信息的确定依赖于SRI的取值)，从而使得终端可以按照基站的要求在单panel或多panel情况下实现数据传输。即，基站可以根据SRI的动态指示来隐含的通知DMRS映射信息，CSR，预编码码本等，从而使得终端可以有效的在单波束和多波束间动态切换，实现了对多panel传输的支持，以及灵活支持单panel传输和多panel传输之间的动态指示。
实施例十二：
本实施例提供了一种基站，参见图12所示，其包括第一处理器121、第一存储器122以及第一通信总线123；其中：第一通信总线123用于实现第一处理器121和第一存储器122之间的连接通信；第一处理器121用于执行第一存储器122中存储的一个或者多个第一程序，以实现如实施例一至实施例十所述的指示方法。
此外，本实施例中还提供了一种终端，参见图13所示，其包括第二处理器131、第二存储器132以及第二通信总线133；其中：第二通信总线133用于实现第二处理器131和第二存储器132之间的连接通信；第二处理器131用于执行第二存储器132中存储的一个或者多个第二程序，以实现如实施例一至实施例十所述的信息确定方法。
本实施例还提供了一种存储介质，该存储介质包括在用于存储信息(诸如计算机可读指令、数据结构、计算机程序模块或其他数据)的任何方法或技术中实施的易失性或非易失性、可移除或不可移除的介质。存储介质包括但不限于RAM(Random Access Memory，随机存取存储器)，ROM(Read-Only Memory，只读存储器)，EEPROM(Electrically Erasable Programmable read only memory，带电可擦可编程只读存储器)、闪存或其他存储器技术、CD-ROM(Compact Disc Read-Only Memory，光盘只读存储器)，数字多功能盘(DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。
本实施例提供的存储介质中存储有计算机可执行指令，该计算机可执行指令可被一个或者多个处理器执行，以实现实施例一至实施例十所述的指示方法或信息确定方法。在此不再赘述。
本公开中，各个实施例中的技术特征，在不冲突的情况下，可以组合在一个实施例中使用。每个实施例仅仅是本公开的具体实施方式。
此外，本领域的技术人员应该明白，上文中所公开方法中的全部或某些步骤、系统、装置中的功能模块/单元可以被实施为软件(可以用计算装置可执行的计算机程序代码来实现)、固件、硬件及其适当的组合。在硬件实施方式中，在以上描述中提及的功能模块/单元之间的划分不一定对应于物理组件的划分；例如，一个物理组件可以具有多个功能，或者一个功能或步骤可以由若干物理组件合作执行。某些物理组件或所有物理组件可以被实施为由处理器，如中央处理器、数字信号处理器或微处理器执行的软件，或者被实施为硬件，或者被实施为集成电路，如专用集成电路。
此外，本领域普通技术人员公知的是，通信介质通常包含计算机可读指令、数据结构、计算机程序模块或者诸如载波或其他传输机制之类的调制数据信号中的其他数据，并且可包括任何信息递送介质。所以，本申请不限制于任何特定的硬件和软件结合。
以上内容是结合具体的实施方式对本发明实施例所作的进一步详细说明，不能认定本申请的具体实施只局限于这些说明。对于本申请所属技术领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本申请的保护范围。

Claims (43)

  1. 一种指示方法，包括：
    将解调参考信号DMRS端口指示，探测参考信号资源指示SRI和传输预编码指示通知给终端，以通知基础信息，所述基础信息包括以下至少之一：
    DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，以及码本子集限制CSR；
    其中，所述基础信息的确定依赖于所述SRI的取值。
  2. 如权利要求1所述的方法，其中，所述基础信息的确定依赖于所述SRI的取值包括：所述基础信息的确定依赖于所述SRI对应的R；其中，R为所述SRI对应的探测参考信号SRS资源的个数或者所述SRI对应的SRS资源的空间信息参数里所包含的参考信号RS的个数。
  3. 如权利要求2所述的方法，其中，在所述基础信息包括所述CSR的情况下，所述基础信息的确定依赖于所述SRI的取值包括：
    在R>1的情况下，选择的CSR为应用于多个预编码和层数指示结合的CSR。
  4. 如权利要求2或3所述的方法，其中，在所述基础信息包括所述预编码矩阵的信息的情况下，所述基础信息的确定依赖于所述SRI的取值包括：
    在R>1的情况下，在下行控制信息DCI中通知多个预编码矩阵；所述多个预编码矩阵的所有列的非零元素的个数相同。
  5. 如权利要求2所述的方法，其中，所述基础信息包括预编码的码本或者预编码矩阵的信息；在R>1的情况下，还包括：
    所述终端选择R对应的码本；
    所述终端根据所述传输预编码指示和所述R对应的码本确定预编码矩阵。
  6. 如权利要求5所述的方法，其中，
    在R>1的情况下，所述R对应的码本中的预编码矩阵的行数为P*R；
    其中，P*R表征所述SRI对应的SRS资源有P*R个端口，P*R个端口按顺序对应所述R对应的码本中的预编码矩阵的多行；P为所述SRI对应的每个SRS资源配置的端口数。
  7. 如权利要求6所述的方法，其中，
    所述R对应的码本中的预编码矩阵的每一列至少存在
    Figure PCTCN2019108575-appb-100001
    比例的元素为零。
  8. 如权利要求6所述的方法，其中，
    所述R对应的码本中的预编码矩阵的所有列中包含的非零元素的个数相同。
  9. 如权利要求6-8任一项所述的方法，其中，
    所述R对应的码本中的预编码矩阵的每一列中至少前一半元素为零或至少后一半元素为零。
  10. 如权利要求6-8任一项所述的方法，还包括：
    所述R对应的码本中的预编码矩阵中至少奇数位端口组的端口对应的元素全是零或者至少偶数位端口组的端口对应的元素全是零；其中，P*R端口按顺序等分为4组。
  11. 如权利要求6所述的方法，其中，
    在R＝2的情况下，所述R对应的码本中的预编码矩阵对应的前P个端口的空间相关信息来自于所述SRI指示的SRS资源的第1个，或者来自于所述SRI指示的SRS资源的空间信息参数里所包含的RS的第1个；所述R对应的码本中的预编码矩阵对应的后P个端口的空间相关信息来自于所述SRI指示的SRS资源的第2个，或者来自于所述SRI指示的SRS资源的空间信息参数里所包含的RS的第2个。
  12. 如权利要求6所述的方法，其中：
    在R＝2的情况下，所述R对应的码本中的预编码矩阵对应的2P个端口按顺序分为4组；
    所述R对应的码本中的预编码矩阵对应的端口号属于偶数组的P个端口的空间相关信息来自于所述SRI指示的SRS资源的第1个，或者来自于所述SRI指示的SRS资源的空间信息参数里所包含的RS的第1个；所述R对应的码本中的预编码矩阵对应的端口号属于奇数组的P个端口的空间相关信息来自于所述SRI指示的SRS资源的第2个或者来自于所述SRI指示的SRS资源的空间信息参数里所包含的RS的第2个。
  13. 如权利要求6所述的方法，其中，
    在R＝2的情况下，所述R对应的码本中的预编码矩阵至少存在一个预编码矩阵是所述R对应的码本中的预编码矩阵中另外一个预编码矩阵的对角交换矩阵。
  14. 如权利要求13所述的方法，其中，所述对角交换矩阵包括：
    将P*R行预编码矩阵中的多行元素按顺序分为4组，在所述P*R行预编码矩阵中，属于偶数组的元素有非零元素的列数为T1的情况下，将所述P*R行预编码矩阵中属于偶数组中的左上角T1列的X个元素移到右下角属于奇数组的 T1列的元素位置上；在所述P*R行预编码矩阵中属于奇数组的元素有非零元素的列数为T2的情况下，将所述P*R行预编码矩阵中属于奇数组中的右下角T2列的Y个元素移到左上角属于偶数组的T2列的元素位置上，得到的矩阵为所述P*R行预编码矩阵的对角交换矩阵；
    或者，将预编码矩阵的左上角的X个元素放置到所述预编码矩阵的右下角，将所述预编码矩阵的右下角的Y个元素放置到所述预编码矩阵的左上角，得到的矩阵为所述预编码矩阵的对角交换矩阵；
    其中，X、Y、T1和T2为正整数。
  15. 如权利要求6所述的方法，其中，在R>1，且所述R对应的码本中的预编码矩阵的每列的非零元素的个数为P的情况下，所述R对应的码本中的预编码矩阵的多列的非零元素组成的向量都相互正交。
  16. 如权利要求7所述的方法，其中，在R＝2，且所述R对应的码本中的预编码矩阵的每列有一半的元素为非零元素的情况下，所述R对应的码本中的预编码矩阵左上角的元素所代表的相位系数的属性和所述R对应的码本中的预编码矩阵右下角的元素所代表的相位系数的属性相同或者相反；
    元素所代表的相位系数的属性相同包括：元素都为实数或者都为虚数；元素所代表的相位系数的属性相反包括：一个元素为实数，另一个元素为虚数；相位系数包括：补偿在一极化方向上的相位。
  17. 如权利要求2所述的方法，其中，在R>1的情况下，所述DMRS端口指示信息指示的DMRS的端口数至少为2，或者所述预编码的码本中不包括传输层的个数为1的情况。
  18. 如权利要求17所述的方法，其中，在R>1的情况下，多个传输层至少占据2个DMRS的码分复用组CDM group。
  19. 如权利要求17或18所述的方法，其中，不同的R对应的DMRS端口映射关系不同。
  20. 一种信息确定方法，包括：
    接收基站通知的解调参考信号DMRS端口指示，探测参考信号资源指示SRI和传输预编码指示，以确定基础信息，所述基础信息包括以下至少之一：
    DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，以及码本子集限制CSR；
    其中，所述基础信息的确定依赖于所述SRI的取值。
  21. 如权利要求20所述的方法，其中，所述基础信息的确定依赖于所述 SRI取值包括：所述基础信息的确定依赖于所述SRI对应的R；其中，R为所述SRI对应的探测参考信号SRS资源的个数或者所述SRI对应的SRS资源的空间信息参数里所包含的参考信号RS的个数。
  22. 如权利要求21所述的信息确定方法，其中，在所述基础信息包括所述CSR的情况下，所述基础信息的确定依赖于所述SRI的取值包括：
    在R>1的情况下，选择的CSR为应用于多个预编码和层数指示结合的CSR。
  23. 如权利要求21或22所述的方法，其中，在所述基础信息包括所述预编码矩阵的信息的情况下，所述基础信息的确定依赖于所述SRI的取值包括：
    在R>1的情况下，接收下行控制信息DCI中通知的多个预编码矩阵；所述多个预编码矩阵的同一列的非零元素的个数相同。
  24. 如权利要求21所述的方法，其中，所述基础信息包括预编码的码本或者预编码矩阵的信息；在R>1的情况下，还包括：
    选择R对应的码本；
    根据所述传输预编码指示和所述R对应的码本来确定预编码矩阵。
  25. 如权利要求24所述的方法，其中，
    在R>1的情况下，所述R对应的码本中的预编码矩阵的行数为P*R；
    其中，P*R表征所述SRI对应的SRS资源被配置P*R个端口，P*R端口按顺序对应所述R对应的码本中的预编码矩阵的多行；P为所述SRI对应的每个SRS资源配置的端口数。
  26. 如权利要求25所述的方法，其中，
    所述R对应的码本中的预编码矩阵的每列至少存在
    Figure PCTCN2019108575-appb-100002
    比例的元素为零。
  27. 如权利要求25所述的方法，其中，
    所述R对应的码本中的预编码矩阵的所有列中包含的非零元素的个数相同。
  28. 如权利要求25-27任一项所述的方法，其中，
    所述R对应的码本中的预编码矩阵的每列中至少前一半元素为零或至少后一半元素为零。
  29. 如权利要求25-27任一项所述的方法，其中，
    所述R对应的码本中的预编码矩阵中至少奇数位端口组的端口对应的元素全是零或者至少偶数位端口组的端口对应的元素全是零；其中，P*R端口按顺 序等分为4组。
  30. 如权利要求25所述的方法，其中，
    在R＝2的情况下，所述R对应的码本中的预编码矩阵对应的前P个端口的空间相关信息来自于所述SRI指示的SRS资源的第1个，或者来自于所述SRI指示的SRS资源的空间信息参数里所包含的RS的第1个；所述R对应的码本中的预编码矩阵对应的后P个端口的空间相关信息来自于所述SRI指示的SRS资源的第2个，或者来自于所述SRI指示的SRS资源的空间信息参数里所包含的RS的第2个。
  31. 如权利要求25所述的方法，还包括：
    在R＝2的情况下，将所述R对应的码本中的预编码矩阵对应的2P个端口按顺序分为4组；
    所述R对应的码本中的预编码矩阵对应的端口号属于偶数组的P个端口的空间相关信息来自于所述SRI指示的SRS资源的第1个，或者来自于所述SRI指示的SRS资源的空间信息参数里所包含的RS的第1个；所述R对应的码本中的预编码矩阵对应的端口号属于奇数组的P个端口的空间相关信息来自于所述SRI指示的SRS资源的第2个或者来自于所述SRI指示的SRS资源的空间信息参数里所包含的RS的第2个。
  32. 如权利要求25所述的方法，其中，
    在R＝2的情况下，所述R对应的码本中的预编码矩阵中至少存在一个预编码矩阵是所述R对应的码本中的预编码矩阵中另外一个预编码矩阵的对角交换矩阵。
  33. 如权利要求32所述的方法，其中，所述对角交换矩阵包括：
    将P*R行预编码矩阵中的多行按顺序分为4组，在所述P*R行预编码矩阵中，属于偶数组的元素有非零元素的列数为T1的情况下，将属于偶数组中的左上角T1列的X个元素移到右下角属于奇数组的T1列上元素位置上；在所述P*R行预编码矩阵中属于奇数组的元素有非零元素的列数为T2的情况下，将属于奇数组中的右下角T2列的Y个元素移到左上角属于偶数组的T2列上元素位置上，得到的矩阵为所述P*R行预编码矩阵的对角交换矩阵；
    或者，将预编码矩阵的左上角的X个元素放置到所述预编码矩阵的右下角，然后将所述预编码矩阵的右下角的Y个元素放置到所述预编码矩阵的左上角，得到的矩阵为所述预编码矩阵的对角交换矩阵；
    其中，X、Y、T1和T2为正整数。
  34. 如权利要求25所述的方法，其中，在R>1，且所述R对应的码本中的预编码矩阵的每列的非零元素的个数为P的情况下，所述R对应的码本中的预编码矩阵的多列的非零元素组成的向量都相互正交。
  35. 如权利要求26所述的方法，其中，在R＝2，且所述R对应的码本中的预编码矩阵的每一列有一半的元素为非零元素的情况下，所述R对应的码本中的预编码矩阵左上角的元素所代表的相位系数的属性和所述R对应的码本中的预编码矩阵右下角的元素所代表的相位系数的属性相同或者相反；
    元素所代表的相位系数的属性相同包括：元素都为实数或者都为虚数；元素所代表的相位系数的属性相反包括：一个元素为实数，另一个元素为虚数；相位系数包括：补偿在第二个极化方向上的相位。
  36. 如权利要求21所述的方法，其中，在R>1的情况下，所述DMRS端口指示信息指示的DMRS的端口数至少为2，或者所述预编码的码本中不包括传输层的个数为1的情况。
  37. 如权利要求36所述的方法，其中，在R>1的情况下，多个传输层至少占据2个DMRS的码分复用组CDM group。
  38. 如权利要求36或37所述的方法，其中，不同的R对应的DMRS端口映射关系不同。
  39. 一种指示装置，包括：通知模块；
    所述通知模块设置为将解调参考信号DMRS端口指示，探测参考信号资源指示SRI和传输预编码指示通知给终端，以通知基础信息，所述基础信息包括至少之一：
    DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，以及码本子集限制CSR；
    其中，所述基础信息的确定依赖于所述SRI的取值。
  40. 一种信息确定装置，包括：接收确定模块；
    所述接收确定模块设置为接收基站通知的解调参考信号DMRS端口指示，探测参考信号资源指示SRI和传输预编码指示，以确定基础信息，所述基础信息包括以下至少之一：
    DMRS端口指示信息，预编码的码本或者预编码矩阵的信息，以及码本子集限制CSR；
    其中，所述基础信息的确定依赖于所述SRI的取值。
  41. 一种基站，包括：第一处理器、第一存储器以及第一通信总线；
    所述第一通信总线设置为实现所述第一处理器和所述第一存储器之间的连接通信；
    所述第一处理器设置为执行所述第一存储器中存储的至少一个第一程序，以实现如权利要求1-19任一项所述的指示方法。
  42. 一种终端，包括：第二处理器、第二存储器以及第二通信总线；
    所述第二通信总线设置为实现所述第二处理器和所述第二存储器之间的连接通信；
    所述第二处理器设置为执行所述第二存储器中存储的至少一个第二程序，以实现如权利要求20-38任一项所述的信息确定方法。
  43. 一种存储介质，存储有至少一个计算机程序，所述至少一个计算机程序可被至少一个处理器执行，以实现如权利要求1-19任一项所述的指示方法，或实现如权利要求20-38任一项所述的信息确定方法。
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EP3860021A1 (en) 2021-08-04
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