WO2024208033A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2024208033A1
WO2024208033A1 PCT/CN2024/083868 CN2024083868W WO2024208033A1 WO 2024208033 A1 WO2024208033 A1 WO 2024208033A1 CN 2024083868 W CN2024083868 W CN 2024083868W WO 2024208033 A1 WO2024208033 A1 WO 2024208033A1
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WIPO (PCT)
Prior art keywords
port
ports
csi
resource
groups
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PCT/CN2024/083868
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English (en)
Chinese (zh)
Inventor
宣一荻
官磊
李锐杰
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication of WO2024208033A1 publication Critical patent/WO2024208033A1/fr
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Classifications

    • 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 signalling, i.e. of overhead other than pilot signals
    • 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
    • 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
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • 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
    • 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
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0092—Indication of how the channel is divided

Definitions

  • the present application relates to the field of communication technology, and in particular to a communication method and device.
  • the base station and the terminal obtain channel state information (CSI) through the reference signal resource (CSI-RS), and then send and receive data based on the obtained CSI.
  • CSI channel state information
  • the base station sends CSI resource configuration information and CSI reporting configuration information associated with the CSI resource configuration information to the terminal through radio resource control (RRC) signaling.
  • RRC radio resource control
  • the CSI resource configuration information is used to configure the relevant information of the reference signal resource, such as the reference signal's time-frequency resources, antenna ports, power resources, and scrambling codes.
  • the spectrum used for communication is getting wider and wider, the number of transmitting antennas of base stations is increasing, and the power consumption of base stations is getting higher and higher.
  • One possible way to save energy is to reduce the power consumption of the base station by turning off the transmitting antenna.
  • the number of antennas used by the base station to send reference signals is also reduced. Therefore, when dynamically turning off the antenna, it is necessary to configure CSI-RS resources with multiple port numbers so that the terminal can measure CSI under different antenna turn-off conditions.
  • different CSI-RS resource configuration information needs to be independently configured in CSI-RS resources with different port numbers, resulting in a large signaling overhead for CSI-RS resource configuration.
  • Embodiments of the present application provide a communication method and apparatus for reducing the signaling overhead of CSI-RS resource configuration.
  • the present application provides a communication method
  • the execution subject of the method may be a terminal device, or a chip or circuit in the terminal device.
  • the method includes: receiving configuration information of a first channel state information reference signal CSI-RS resource, the first CSI-RS resource including M ports; receiving first information, the first information indicating L ports among the M ports; and determining a second CSI-RS resource from the first CSI-RS resource according to the first information.
  • the second CSI-RS resource is a resource including the L ports in the first CSI-RS resource.
  • the first information indicates L ports among the M ports included in the first CSI-RS resource, so that the terminal device can determine the second CSI-RS resource corresponding to the L ports from the first CSI-RS resource according to the first information, and there is no need to set the configuration information of the second CSI-RS resource separately.
  • this scheme can save signaling overhead and improve resource utilization.
  • the channel state information can be determined based on the second CSI-RS resource.
  • the channel state information includes a CSI-RS resource index, and the CSI-RS resource index is an index of the first CSI-RS resource or an index of the second CSI-RS resource.
  • the channel state information further includes first channel quality information and second channel quality information, the first channel quality information corresponds to a first CSI-RS resource, and the second channel quality information corresponds to a second CSI-RS resource.
  • the channel state information includes a first rank indication (RI) and/or a second RI, the first RI corresponds to a first CSI-RS resource, and the second RI corresponds to a second CSI-RS resource.
  • RI rank indication
  • second RI corresponds to a second CSI-RS resource.
  • the first information may include high-layer or physical layer signaling.
  • the first information indicates L ports among the M ports, including:
  • Case 1 M ports are ports included in A first code division multiplexing CDM groups, and the first information indicates B second CDM groups in the A first CDM groups; accordingly, L ports are ports included in B second CDM groups. That is, the terminal device can determine L ports based on B second CDM groups.
  • Case 2 M ports are ports included in C first orthogonal cover codes OCC codes, and the first information indicates ports included in D second OCC codes among the C first OCC codes; wherein L ports are ports included in the D second OCC codes. That is, the terminal device can determine L ports according to the D second OCC codes.
  • C ports included in the first OCC codes can be understood as the first
  • the ports included in the CSI-RS resource are ports that use any first OCC code among the C first OCC codes
  • "ports included in the D second OCC codes” can be understood as ports included in the second CSI-RS resource that use any second OCC code among the D second OCC codes.
  • M ports are ports included in C first OCC codes in A first CDM groups, and the first information indicates B second CDM groups in A first CDM groups and D second OCC codes in C first OCC codes; wherein L ports are ports included in D second OCC codes in B second CDM groups. That is, the terminal device can determine the L ports according to B second CDM groups and D second OCC codes.
  • "ports included in C first OCC codes in A first CDM groups” can be understood as ports using any first OCC code among the C first OCC codes in the ports included in A first CDM groups
  • "ports included in D second OCC codes in B second CDM groups” can be understood as ports using any second OCC code among the ports included in B first CDM groups.
  • L ports out of M ports are implicitly indicated, which can further reduce signaling overhead and thus improve resource utilization.
  • the first information includes a first bitmap, and the first bitmap indicates B second CDM groups among A first CDM groups; or, the first information is used to indicate the indexes of B second CDM groups among A first CDM groups.
  • the first information may indicate B second CDM groups among A first CDM groups by means of a bitmap, or may indicate B second CDM groups among A first CDM groups by means of indicating the indexes of B second CDM groups among A first CDM groups.
  • the M ports are ports included in the A first CDM groups, and the A first CDM groups are CDM groups in the E first CDM group sets; accordingly, the first information indicates the B second CDM groups in the A first CDM groups, including: the first information indicates the F second CDM group sets where the B second CDM groups are located; wherein the F second CDM group sets are subsets of the E first CDM group sets.
  • the E first CDM group sets are obtained by pre-grouping the A first CDM groups, and then the first information can implicitly indicate the B second CDM groups in the A first CDM groups by indicating the F second CDM group sets where the B second CDM groups in the A first CDM groups are located; relative to the scheme of indicating each second CDM group in the B second CDM groups one by one, the signaling overhead can be further reduced, thereby improving resource utilization.
  • the E first CDM group sets may be obtained by grouping A first CDM groups according to the time domain resources or frequency domain resources included in the A first CDM groups. That is, different first CDM group sets include different time domain resources, or different first CDM group sets include different frequency domain resources.
  • the first information includes a second bitmap, which indicates D second OCC codes among C first OCC codes; or, the first information indicates the index of D second OCC codes among C first OCC codes; or, C first OCC codes belong to G first OCC code sets, D second OCC codes belong to H second OCC code sets, and H second OCC code sets are subsets of G first OCC code sets. Accordingly, the first information indicates the index of the H second OCC code sets where the D second OCC codes are located, and then the terminal device determines the D second OCC codes according to the index of the H second OCC code sets. In this design, multiple ways of indicating the D second OCC codes are provided.
  • the M ports are ports included in the Y first port groups, and the first information indicates L ports among the M ports, including:
  • the first information indicates X second port groups in Y first port groups; accordingly, L ports are ports included in the X second port groups. That is, the terminal device can determine the L ports according to the X second port groups. In case 1, all ports in the X second port groups are indicated as L ports, so that the signaling design is relatively simple.
  • the first information indicates X second port groups and the first pattern in the Y first port groups, and the first pattern indicates the ports in each of the X second port groups that belong to the second CSI-RS resource.
  • the ports in each second port group that belong to the second CSI-RS resource can be understood as the ports that belong to the L ports in each second port group. That is to say, the terminal device can determine the L ports based on the X second port groups and the first pattern.
  • the first information indicates the ports of the X second port groups that belong to the second CSI-RS resource by means of the first pattern, so that the network device can flexibly configure the ports.
  • the first information indicates a first pattern
  • the first pattern indicates the ports belonging to the second CSI-RS resource in each of the Y first port groups.
  • the ports belonging to the second CSI-RS resource in each first port group can be understood as the ports belonging to the L ports in each first port group. That is to say, the terminal device can determine the L ports according to the first pattern.
  • the first information indicates the ports belonging to the second CSI-RS resource in the Y first port groups by means of the first pattern, which further enables the network device to flexibly configure the ports.
  • the first information indicates X second port groups among the Y first port groups; further, when the first information indicates X second port groups among the Y first port groups, the terminal device can determine L ports according to the X second port groups and a predefined first pattern, and the first pattern indicates a port belonging to the second CSI-RS resource in each of the X second port groups. In case 4, L ports are determined according to the predefined first pattern and the X second port groups indicated by the first information.
  • L ports in M ports are implicitly indicated, which can further reduce signaling overhead and thus improve resource utilization.
  • the Y first port groups are obtained by dividing the M ports.
  • the first dimension and the second dimension belong to the first codebook, which is the codebook used when calculating the precoding matrix on the first CSI-RS resource; accordingly, N1 is the number of CSI-RS ports included in the first dimension in the first codebook, and N2 is the number of CSI-RS ports included in the second dimension in the first codebook.
  • the first dimension and the second dimension are the dimensions of the first spatial basis vector, which is used to determine the precoding matrix on the first CSI-RS resource.
  • the M ports are ports in a first port matrix and a second port matrix
  • the first port matrix includes the first port to the M/2th port among the M ports
  • the second port matrix includes the (M/2+1)th port to the Mth port among the M ports
  • the first port matrix includes N1 columns and N2 rows
  • the second port matrix includes N1 columns and N2 rows
  • N1 is the number of ports included in the first CSI-RS resource in the first dimension
  • N2 is the number of ports included in the first CSI-RS resource in the second dimension
  • the Y first port groups are obtained by dividing the ports in the first port matrix and the second port matrix, and the G ports included in each of the Y first port groups meet a preset condition; wherein the preset condition is that the G ports have the same row coordinates or column coordinates in the first port matrix, or the G ports have the same row coordinates or column coordinates in the second port matrix, or the G ports are ports with the same row coordinates or column coordinates in the first port matrix and the second port matrix
  • the number of ports included in the first dimension of the first CSI-RS resource is N1, and the number of ports included in the second dimension of the first CSI-RS resource is N2;
  • the first information indicates L ports out of the M ports, including: the first information indicates N1' and N2'; wherein N1' is the number of ports of the second CSI-RS resource in the first dimension, and N2' is the number of ports of the second CSI-RS resource in the second dimension; accordingly, the terminal device can determine the L ports based on N1', N2', N1 and N2.
  • the first information implicitly indicates L ports out of the M ports by indicating N1' and N2', which can further reduce signaling overhead and thus improve resource utilization.
  • the first dimension and the second dimension belong to the first codebook, which is the codebook used when calculating the precoding matrix on the first CSI-RS resource; accordingly, N1 is the number of CSI-RS ports included in the first dimension in the first codebook, and N2 is the number of CSI-RS ports included in the second dimension in the first codebook.
  • the first dimension and the second dimension are the dimensions of the first spatial basis vector, which is used to determine the precoding matrix on the first CSI-RS resource.
  • N1 and N2 may be preset, or may be indicated by the network device to the terminal device.
  • the terminal device may also receive second information, and the second information indicates N1 and N2.
  • the first information may also indicate N1 and N2. It should be understood that when the first information indicates N1, N2, N1' and N2', N1 and N2 may be indicated by the first bit field in the first information, and N1' and N2' may be indicated by the second bit field in the first information.
  • the L ports are evenly distributed among the M ports; or, the L ports are evenly spaced in phase among the M ports.
  • the first port to the M/2th port of the M ports are ports in a first port matrix
  • the first port matrix includes N1 columns and N2 rows
  • the first port to the L/2th port of the L ports are ports in a second port matrix.
  • the second port matrix includes N1' columns and N2'rows; M and L are integer multiples of 2, and the first port to the L/2th port (i.e., the ports included in the second port matrix) among the L ports are evenly distributed in the first port matrix.
  • the ports included in the N1' column of the second port matrix are the ports included in the continuous N2' rows in the continuous N1' columns in the N1 column of the first port matrix, or the ports included in the N1' column of the second port matrix are the ports included in the N2' rows with equal intervals in the continuous N1' columns in the N1 column of the first port matrix, or the ports included in the N1' column of the second port matrix are the ports included in the continuous N2' rows in the evenly spaced N1' columns in the N1 column of the first port matrix, or the ports included in the N1' column of the second port matrix are the ports included in the N2' rows with equal intervals in the evenly spaced N1' columns in the N1 column of the first port matrix.
  • the (M/2+1)th port to the Mth port among the M ports are ports in a third port matrix
  • the third port matrix includes N1 columns and N2 rows
  • the (L/2+1)th port to the Lth port among the L ports are ports in a fourth port matrix
  • the fourth port matrix includes N1' columns and N2' rows
  • M and L are integer multiples of 2
  • the (L/2+1)th port to the Lth port among the L ports i.e., the ports included in the fourth port matrix) are evenly distributed in the third port matrix.
  • the ports included in the N1’ column of the fourth port matrix are the ports included in the consecutive N2’ rows in the consecutive N1’ columns in the N1 column of the third port matrix, or the ports included in the N1’ column of the fourth port matrix are the ports included in the equally spaced N2’ rows in the consecutive N1’ columns in the N1 column of the third port matrix, or the ports included in the N1’ column of the fourth port matrix are the ports included in the consecutive N2’ rows in the equally spaced N1’ columns in the N1 column of the third port matrix, or the ports included in the N1’ column of the fourth port matrix are the ports included in the equally spaced N2’ rows in the equally spaced N1’ columns in the N1 column of the third port matrix.
  • the identifier of each port in the M ports is M ij
  • the terminal device can determine the port indexes of the L
  • the first information indicates N1’ and N2’, including: the first information is the first index in the first index table, the first index indicates N1’ and N2’, the first index table includes multiple indexes, and each index in the multiple indexes indicates a value of N1’ and N2’.
  • the first information implicitly indicates the values of N1’ and N2’ by indicating the first index in the first index table, which can further reduce signaling overhead and thus improve resource utilization.
  • the first information is any one of the following: cell-specific indication information, terminal device group-specific indication information, or terminal device-specific indication information.
  • an embodiment of the present application further provides a communication method
  • the execution subject of the method may be a network device, or a chip or circuit in the network device.
  • the method includes: sending configuration information of a first channel state information reference signal CSI-RS resource, the first CSI-RS resource includes M ports; sending first information, the first information indicates L ports among the M ports; wherein the resources belonging to the L ports in the first CSI-RS resource are second CSI-RS resources.
  • the first information indicates L ports among the M ports, including:
  • Case 1 the M ports are ports included in A first code division multiplexing CDM groups, and the first information indicates B second CDM groups in the A first CDM groups; correspondingly, the L ports are ports included in the B second CDM groups.
  • Case 2 the M ports are ports included in the C first orthogonal cover codes OCC codes, and the first information indicates ports included in the D second OCC codes among the C first OCC codes; wherein the L ports are ports included in the D second OCC codes.
  • the M ports are ports included by the C first OCC codes in the A first CDM groups, and the first information indicates the B second CDM groups in the A first CDM groups and the D second OCC codes in the C first OCC codes; wherein, the L ports are ports included by the D second OCC codes in the B second CDM groups.
  • the first information includes a first bit map, which indicates B second CDM groups among A first CDM groups; or, the first information is used to indicate the indexes of B second CDM groups among A first CDM groups.
  • the M ports are ports included in A first CDM groups, and the A first CDM groups are CDM groups in a set of E first CDM groups; accordingly, the first information indicates B second CDM groups in the A first CDM groups, including: The first information indicates the indexes of the F second CDM group sets where the B second CDM groups are located; wherein the F second CDM group sets are subsets of the E first CDM group sets.
  • the E first CDM group sets may be obtained by grouping A first CDM groups according to the time domain resources or frequency domain resources included in the A first CDM groups. That is, different first CDM group sets include different time domain resources, or different first CDM group sets include different frequency domain resources.
  • the first information includes a second bit map, which indicates D second OCC codes among C first OCC codes; or, the first information indicates the indexes of D second OCC codes among C first OCC codes; or, the C first OCC codes belong to G first OCC code sets, the D second OCC codes belong to H second OCC code sets, and the H second OCC code sets are subsets of the G first OCC code sets. Accordingly, the first information indicates the indexes of the H second OCC code sets to which the D second OCC codes belong, and then the terminal device determines the D second OCC codes based on the indexes of the H second OCC code sets.
  • the M ports are ports included in the Y first port groups, and the first information indicates L ports among the M ports, including:
  • Case 1 the first information indicates X second port groups among the Y first port groups; accordingly, the L ports are ports included in the X second port groups.
  • the first information indicates X second port groups in Y first port groups and a first pattern
  • the first pattern indicates the ports belonging to the second CSI-RS resource in each of the X second port groups.
  • the ports belonging to the second CSI-RS resource in each second port group can be understood as the ports belonging to the L ports in each second port group.
  • the first information indicates a first pattern
  • the first pattern indicates a port belonging to the second CSI-RS resource in each of the Y first port groups.
  • a port belonging to the second CSI-RS resource in each first port group can be understood as a port belonging to the L ports in each first port group.
  • the first information indicates X second port groups among Y first port groups; wherein the X second port groups and the predefined first pattern are used to determine L ports, and the first pattern indicates the ports belonging to the second CSI-RS resource in each of the X second port groups.
  • the Y first port groups are obtained by dividing the M ports.
  • the M ports are ports in a first port matrix and a second port matrix
  • the first port matrix includes the first port to the M/2th port among the M ports
  • the second port matrix includes the (M/2+1)th port to the Mth port among the M ports
  • the first port matrix includes N1 columns and N2 rows
  • the second port matrix includes N1 columns and N2 rows
  • N1 is the number of ports included in the first CSI-RS resource in the first dimension
  • N2 is the number of ports included in the first CSI-RS resource in the second dimension
  • the Y first port groups are obtained by dividing the ports in the first port matrix and the second port matrix, and the G ports included in each of the Y first port groups meet a preset condition; wherein the preset condition is that the G ports have the same row coordinates or column coordinates in the first port matrix, or the G ports have the same row coordinates or column coordinates in the second port matrix, or the G ports are ports with the same row coordinates or column coordinates in the first port matrix and the second port matrix
  • the number of ports included in the first dimension of the first CSI-RS resource is N1, and the number of ports included in the second dimension of the first CSI-RS resource is N2;
  • the first information indicates L ports out of the M ports, including: the first information indicates N1’ and N2’; wherein N1’ is the number of ports of the second CSI-RS resource in the first dimension, and N2’ is the number of ports of the second CSI-RS resource in the second dimension; wherein N1’, N2’, N1 and N2 are used to determine the L ports.
  • N1 and N2 may be preset, or may be indicated by the network device to the terminal device.
  • the terminal device may also receive second information, and the second information indicates N1 and N2.
  • the first information may also indicate N1 and N2. It should be understood that When the first information indicates N1, N2, N1′ and N2′, N1 and N2 may be indicated by a first bit field in the first information, and N1′ and N2′ may be indicated by a second bit field in the first information.
  • the L ports are evenly distributed among the M ports; or, the L ports are evenly spaced in phase among the M ports.
  • the first port to the M/2th port among the M ports are ports in a first port matrix
  • the first port matrix includes N1 columns and N2 rows
  • the first port to the L/2th port among the L ports are ports in a second port matrix
  • the second port matrix includes N1' columns and N2' rows
  • M and L are integer multiples of 2
  • the first port to the L/2th port among the L ports i.e., the ports included in the second port matrix
  • the ports included in the N1’ column of the second port matrix are the ports included in the consecutive N2’ rows in the consecutive N1’ columns in the N1 column of the first port matrix, or the ports included in the N1’ column of the second port matrix are the ports included in the equally spaced N2’ rows in the consecutive N1’ columns in the N1 column of the first port matrix, or the ports included in the N1’ column of the second port matrix are the ports included in the consecutive N2’ rows in the equally spaced N1’ columns in the N1 column of the first port matrix, or the ports included in the N1’ column of the second port matrix are the ports included in the equally spaced N2’ rows in the equally spaced N1’ columns in the N1 column of the first port matrix.
  • the (M/2+1)th port to the Mth port among the M ports are ports in a third port matrix
  • the third port matrix includes N1 columns and N2 rows
  • the (L/2+1)th port to the Lth port among the L ports are ports in a fourth port matrix
  • the fourth port matrix includes N1' columns and N2' rows
  • M and L are integer multiples of 2
  • the (L/2+1)th port to the Lth port among the L ports i.e., the ports included in the fourth port matrix) are evenly distributed in the third port matrix.
  • the ports included in the N1’ column of the fourth port matrix are the ports included in the consecutive N2’ rows in the consecutive N1’ columns in the N1 column of the third port matrix, or the ports included in the N1’ column of the fourth port matrix are the ports included in the equally spaced N2’ rows in the consecutive N1’ columns in the N1 column of the third port matrix, or the ports included in the N1’ column of the fourth port matrix are the ports included in the consecutive N2’ rows in the equally spaced N1’ columns in the N1 column of the third port matrix, or the ports included in the N1’ column of the fourth port matrix are the ports included in the equally spaced N2’ rows in the equally spaced N1’ columns in the N1 column of the third port matrix.
  • each of the M ports is identified as Mij
  • the first information indicates N1’ and N2’, including: the first information is the first index in the first index table, the first index indicates N1’ and N2’, the first index table includes multiple indexes, each index in the multiple indexes indicates a value of N1’ and N2’.
  • the first information is any one of the following: cell-specific indication information, terminal device group-specific indication information, or terminal device-specific indication information.
  • an embodiment of the present application further provides another communication method
  • the execution subject of the method may be a terminal device, or a chip or circuit in the terminal device.
  • the method includes: receiving a first signaling, the first signaling indicating configuration information of a first CSI-RS resource; receiving a second signaling, the second signaling indicating a portion of configuration information of a second CSI-RS resource; determining the second CSI-RS resource according to the configuration information of the first CSI-RS resource and a portion of configuration information of the second CSI-RS resource.
  • the terminal device can determine the second CSI-RS resource based on the configuration information of the first CSI-RS resource and a part of the configuration information of the second CSI-RS resource, thereby effectively reducing the signaling overhead of the first CSI-RS resource configuration, thereby improving resource utilization.
  • the configuration information of the first CSI-RS resource includes a dedicated configuration of the first CSI-RS resource and a common configuration of the first CSI-RS and the second CSI-RS resource; the second configuration information includes dedicated configuration information of the second CSI-RS resource.
  • the common configuration of the first CSI-RS and the second CSI-RS resources may include at least one of the following: The CDM group type corresponding to the resource, the resource block carrying the CSI-RS resource, the frequency domain density of the CSI-RS resource, the first period of the CSI-RS resource, the time slot carrying the CSI-RS resource in the first period, the scrambling code corresponding to the CSI-RS resource, the power control offset, and the power control offset relative to the synchronization signal.
  • the dedicated configuration of the first CSI-RS resource may include at least one of the following: M CSI-RS ports corresponding to the first CSI-RS resource, the number of ports of the first CSI-RS resource, a subcarrier used to carry the first CSI-RS resource, and an OFDM symbol used to carry the first CSI-RS resource.
  • part of the configuration information of the second CSI-RS resource may include at least one item: L CSI-RS ports corresponding to the second CSI-RS resource, the number of ports of the second CSI-RS resource, the subcarrier used to carry the second CSI-RS resource, and the OFDM symbol used to carry the second CSI-RS resource.
  • the terminal device determines the second CSI-RS resource based on the configuration information of the first CSI-RS resource and part of the configuration information of the second CSI-RS resource, including: the terminal device determines the second CSI-RS resource based on the common configuration of the first CSI-RS and the second CSI-RS resources, and part of the configuration information of the second CSI-RS resource.
  • the terminal device determines the second CSI-RS resource based on the CDM group type corresponding to the CSI-RS resource, the resource block carrying the CSI-RS resource, the frequency domain density of the CSI-RS resource, the first period of the CSI-RS resource, the time slot carrying the CSI-RS resource within the first period, the scrambling code corresponding to the CSI-RS resource, the power control offset, the power control offset relative to the synchronization signal, and the L CSI-RS ports corresponding to the second CSI-RS resource, the number of ports of the second CSI-RS resource, the subcarrier used to carry the second CSI-RS resource, and the OFDM symbol used to carry the second CSI-RS resource.
  • the terminal device determines the second CSI-RS resource based on the CDM group type corresponding to the CSI-RS resource, the resource block carrying the CSI-RS resource, the frequency domain density of the CSI-RS resource, the first period of the CSI-RS resource, the time slot carrying the CSI-RS resource in the first period, the scrambling code corresponding to the CSI-RS resource, the L CSI-RS ports corresponding to the second CSI-RS resource, the number of ports of the second CSI-RS resource, the subcarrier used to carry the second CSI-RS resource, and the OFDM symbol used to carry the second CSI-RS resource.
  • the method further includes: receiving first information, wherein the first information indicates that the second CSI-RS resource is a resource belonging to L CSI-RS ports in the first CSI-RS resource.
  • the association relationship between the second CSI-RS resource and the first CSI-RS resource is indicated by the first information, so that the terminal device can determine the first CSI-RS resource in the second CSI-RS resource.
  • an embodiment of the present application further provides another communication method, the execution subject of the method may be a network device, or a chip or circuit in the network device.
  • the method includes: sending a first signaling, the first signaling indicating the configuration information of the first CSI-RS resource; sending a second signaling, the second signaling indicating a part of the configuration information of the second CSI-RS resource; wherein the configuration information of the first CSI-RS resource and a part of the configuration information of the second CSI-RS resource are used to determine the second CSI-RS resource.
  • the configuration information of the first CSI-RS resource includes a dedicated configuration of the first CSI-RS resource and a common configuration of the first CSI-RS and the second CSI-RS resource; the second configuration information includes dedicated configuration information of the second CSI-RS resource.
  • the common configuration of the first CSI-RS and the second CSI-RS resources may include at least one of the following: the CDM group type corresponding to the CSI-RS resource, the resource block carrying the CSI-RS resource, the frequency domain density of the CSI-RS resource, the first period of the CSI-RS resource, the time slot carrying the CSI-RS resource in the first period, the scrambling code corresponding to the CSI-RS resource, the power control offset, and the power control offset relative to the synchronization signal.
  • the dedicated configuration of the first CSI-RS resource may include at least one of the following: M CSI-RS ports corresponding to the first CSI-RS resource, the number of ports of the first CSI-RS resource, a subcarrier used to carry the first CSI-RS resource, and an OFDM symbol used to carry the first CSI-RS resource.
  • part of the configuration information of the second CSI-RS resource may include at least one item: L CSI-RS ports corresponding to the second CSI-RS resource, the number of ports of the second CSI-RS resource, the subcarrier used to carry the second CSI-RS resource, and the OFDM symbol used to carry the second CSI-RS resource.
  • the method also includes: sending first information, where the first information indicates that the second CSI-RS resource is a resource in the first CSI-RS resource belonging to L CSI-RS ports.
  • a communication device which may be a terminal device or a network device, or a chip arranged in the terminal device or the network device.
  • the communication device may implement the methods provided in the first aspect, the second aspect, the third aspect, and the fourth aspect.
  • the communication device includes a module, unit, or means for implementing the above method.
  • the module, unit, or means can be implemented by hardware, software, or by hardware executing corresponding software.
  • the hardware or software includes one or more components related to the above function. Can correspond to modules or units.
  • a communication device comprising a transceiver unit.
  • the communication device further comprises a processing unit.
  • the communication device can implement the method provided in the first aspect, the second aspect, the third aspect, the fourth aspect, or any one of the first aspect, the second aspect, the third aspect, and the fourth aspect.
  • a communication device comprising a processor.
  • the processor may be used to execute the method provided in the first aspect, the second aspect, the third aspect, the fourth aspect, or any one of the first aspect, the second aspect, the third aspect, and the fourth aspect.
  • the device further comprises a memory, the processor is coupled to the memory, the memory is used to store computer programs or instructions, and the processor may execute the program or instructions in the memory, so that the device may execute the method provided in the first aspect, the second aspect, the third aspect, the fourth aspect, or any one of the first aspect, the second aspect, the third aspect, and the fourth aspect.
  • a communication device comprising an interface circuit and a logic circuit, wherein the logic circuit is coupled to the interface circuit.
  • the interface circuit may be a code/data read/write interface circuit, the interface circuit is used to receive a computer execution instruction (the computer execution instruction is stored in a memory, may be read directly from the memory, or may pass through other devices) and transmit it to the logic circuit, so that the logic circuit runs the computer execution instruction to execute the method provided in the first aspect, the second aspect, the third aspect, the fourth aspect, or any one of the first aspect, the second aspect, the third aspect, and the fourth aspect.
  • the communication device may be a chip or a chip system.
  • a computer-readable storage medium in which a computer program or instruction is stored.
  • the computer program or instruction is executed by a processor, the method of any one of the first to fourth aspects and any possible design is implemented.
  • a computer program product storing instructions, which, when executed by a processor, implements the method in any one of the first to fourth aspects and any possible design.
  • a chip system including a processor and a memory, for implementing the method in any of the first to fourth aspects and any possible design.
  • the chip system can be composed of a chip, or can include a chip and other discrete devices.
  • a communication system comprising a network device and a terminal device, wherein the network device can be used to implement the method described in the second aspect or the fourth aspect, and the terminal device can be used to implement the method described in the first aspect or the third aspect.
  • a communication method including: a network device sends configuration information of a first CSI-RS resource to a terminal device, the first CSI-RS resource includes M ports, the network device also sends first information to the terminal device, the first information indicates L ports among the M ports, and the terminal device determines a second CSI-RS resource from the first CSI-RS resource according to the first information.
  • the technical effects brought about by any implementation of the above-mentioned fifth to thirteenth aspects can refer to the technical effects brought about by the above-mentioned first or third aspects, and will not be repeated here.
  • FIG1A is a schematic diagram of a CDM group
  • FIG1B is a schematic diagram of an OCC code
  • FIG1C is a schematic diagram of a network architecture
  • FIG2 is a schematic diagram of a flow chart of a first communication method provided in an embodiment of the present application.
  • FIG3 is a schematic diagram of a measurement resource indication according to an embodiment of the present application.
  • FIG4 is a second schematic diagram of a measurement resource indication provided in an embodiment of the present application.
  • FIG5 is a schematic diagram of ports corresponding to OCC codes provided in an embodiment of the present application.
  • FIG6 is a third schematic diagram of a measurement resource indication provided in an embodiment of the present application.
  • FIG7 is a fourth schematic diagram of a measurement resource indication provided in an embodiment of the present application.
  • FIG8 is a fifth schematic diagram of a measurement resource indication provided in an embodiment of the present application.
  • FIG9 is one of the schematic diagrams of the CSI-RS port group provided in an embodiment of the present application.
  • FIG10 is a sixth schematic diagram of a measurement resource indication provided in an embodiment of the present application.
  • FIG11 is a seventh schematic diagram of a measurement resource indication provided in an embodiment of the present application.
  • FIG12 is a schematic diagram of an eighth embodiment of a measurement resource indication provided by an embodiment of the present application.
  • FIG13 is a second schematic diagram of a CSI-RS port group provided in an embodiment of the present application.
  • FIG14 is a third schematic diagram of a CSI-RS port group provided in an embodiment of the present application.
  • FIG15 is a ninth schematic diagram of a measurement resource indication provided in an embodiment of the present application.
  • FIG16 is a schematic diagram of a flow chart of a second communication method provided in an embodiment of the present application.
  • FIG17 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application.
  • FIG18 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application.
  • CSI-RS Channel State Information Reference Signal
  • the network equipment and the terminal obtain CSI by measuring the reference signal, and transmit and receive data according to the obtained CSI.
  • channel measurement or interference measurement of the downlink channel is usually performed through CSI-RS.
  • the base station sends the CSI-RS configuration to the terminal through RRC signaling.
  • the terminal performs measurements based on the CSI-RS configuration, obtains CSI and reports it to the base station so that the base station can perform resource scheduling based on the CSI.
  • CSI-ReportConfig is used to configure reporting-related parameters, such as reporting types such as periodic reporting, non-periodic reporting, etc., and reporting amounts such as RI/PMI/CQI.
  • CSI-ResourceConfig is used to configure reference signal resource-related information, such as reference signal time-frequency resources, resource mapping configuration, antenna ports, power resources, and scrambling codes.
  • power resources can be, for example, power control offsets and power control offsets relative to synchronization channels.
  • the power control offset indicates the power offset of the assumed PDSCH relative to the CSI-RS resource, which is used for CQI calculation.
  • the power control offset relative to the synchronization channel indicates the power offset of the CSI-RS relative to the secondary synchronization signal.
  • the resource mapping configuration may include: indication information indicating the occupancy of frequency domain resources within a PRB (frequencyDomainAllocation), indication information indicating the number of ports (nrofPorts), indication information indicating the occupancy of OFDM symbols within a slot (firstOFDMSymbolInTimeDomain, or firstOFDMSymbolInTimeDomain and firstOFDMSymbolInTimeDomain2), indication information indicating the code division multiplexing type (cdm-Type), indication information indicating the frequency domain density of CSI-RS (density), and indication information indicating the occupied PRB (CSI-FrequencyOccupation); the terminal device can determine the physical time and frequency resources of the CSI-RS according to the resource mapping configuration.
  • CSI-ReportConfig The fields included in CSI-ReportConfig and CSI-ResourceConfig are described below respectively.
  • CSI reporting configuration identification (CSI-ReportConfigId) field This field is the identification number of CSI-ReportConfig, which is used to identify the reporting configuration of the CSI.
  • Channel measurement resources This field is used to configure reference signal resources for channel measurement. For example, this field may carry the identifier of the CSI-ResourceConfig for channel measurement (CSI-ResourceConfigId).
  • ReportConfigType This field is used to configure the reporting type of CSI.
  • the reporting type can be divided into periodic, semi-persistent and non-periodic reporting.
  • Report Quantity field This field is used to indicate the reported quantity of CSI.
  • the reportQuantity field can indicate different reported quantities through different configurations.
  • the reported quantity of CSI can include, but is not limited to, reference signal resource identifier, CSI-RS resource indicator (CSI-RS resource indicator, CRI), RI, PMI, CQI, etc.
  • CSI-ReportConfig may also include other fields, which are not listed here one by one.
  • CSI resource configuration identification (CSI-ResourceConfigId) field This field is the identification number of CSI-ResourceConfig, which is used to identify the resource configuration of the CSI.
  • CSI resource set list (CSI-RS-ResourceSetList) field: This field is used to configure a queue of resource sets, where the resource set may include a reference signal resource set for channel measurement.
  • the CSI-RS-ResourceSetList field can be associated with the configuration of the NZP-CSI-RS resource set (NZP-CSI-RS-ResourceSet) through NZP-CSI-RS-ResourceSetId.
  • Resource Type field This field is used to configure the type of reference signal resources.
  • the types of reference signal resources can be divided into periodic resources, semi-persistent resources, and non-periodic resources.
  • the CSI resource described in this article can be equivalent to the NZP-CSI-RS resource for channel measurement.
  • the CSI reporting configuration information is used to configure reporting related parameters, such as reporting type such as periodic reporting, non-periodic reporting, etc. And reporting quantity, such as rank indication (RI)/precoding matrix indicator (PMI)/channel quality indicator (CQI), etc.
  • the terminal measures all antenna ports configured based on the CSI resource configuration information, obtains CSI and reports it to the base station, so that the base station can perform resource scheduling according to the CSI.
  • a code division multiplexing (CDM) group includes multiple CSI-RS ports, and the multiple CSI-RS ports use different orthogonal cover codes (OCC) on the same physical time-frequency resources to achieve code division multiplexing.
  • CDC orthogonal cover codes
  • CDM group 0 carries four CSI-RS ports (i.e., ports 0, 1, 2, and 3) on four resource elements (REs) through code division multiplexing, and the four CSI-RS ports correspond to four OCC codes, which are orthogonal to each other.
  • a group of OCC codes corresponding to each CSI-RS port in a CDM group may be, for example, [+1*+1, +1*+1, -1*+1, -1*+1], which is generated by frequency domain OCC codes and time domain OCC codes.
  • the OCC code corresponding to each CSI-RS port in a CDM group is shown in Table 1.
  • Table 1 illustrates the OCC code of a CDM group that occupies 2 REs in the time domain and 2 REs in the frequency domain.
  • the CDM group includes 4 CSI-RS ports.
  • the 4 CSI-RS ports correspond to 4 OCC codes with indices from small to large in the order of CSI-RS port indices from small to large.
  • the OCC code of the CSI-RS port is generated by the frequency domain OCC code and the time domain OCC code, that is, the OCC code of the CSI-RS port is the product of the frequency domain OCC code and the time domain OCC code.
  • the OCC code with index 1 in the following Table 1 is the product [+1*+1,+1*+1,-1*+1,-1*+1] of the frequency domain OCC code [+1,-1] and the time domain OCC code [+1,+1].
  • the OCC codes in a CDM group may include OCC code 0, OCC code 1, OCC code 2, and OCC code 3 as shown in FIG. 1B .
  • the terminal can determine the size of the CDM group and the OCC codes corresponding to the multiple CSI-RS ports included in the CDM group according to the resource mapping configuration. If the resource mapping configuration indicates that the code division multiplexing type is 'CDM4-FD2-TD2', the terminal device determines the code division multiplexing of 4 CSI-RS ports in a CDM group, and the 4 CSI-RS ports are carried on 4 REs in a physical resource block (PRB), and further determines the OCC code according to Table 1.
  • PRB physical resource block
  • Table 1 OCC codes corresponding to CDM groups occupying 2 REs in the time domain and frequency domain respectively
  • the antenna port may also be referred to as a port for short, or may be referred to as a CSI-RS port.
  • the antenna ports in the embodiments of the present application refer to the ports of the logical antenna, not the ports of the physical antenna.
  • the signal transmitted on each antenna port is transmitted through a transmission channel associated with it.
  • the signal transmitted on each logical antenna port is weighted by a weighting coefficient and then transmitted through multiple transmission channels. It can also be understood that multiple physical antennas are weighted by weighting coefficients to form a logical antenna.
  • the weighting coefficient here can be a complex number or a real number, and the weighting coefficients on different physical antennas may be the same or different.
  • Each antenna port has corresponding time-frequency resources and reference signals.
  • the time-frequency resources corresponding to different antenna ports may be the same or different.
  • the reference signal transmitted by the base station through antenna port A can be used by the terminal to estimate the characteristics of the wireless channel from antenna port A to the terminal.
  • the characteristics of the wireless channel can be used by the terminal to estimate the physical channel transmitted through antenna port A, or to determine the modulation order, code rate and other information during data transmission.
  • a reference signal can correspond to one or more antenna ports.
  • the antenna port group may consist of one or more antenna ports (port). Among them, the antenna ports included in different antenna port groups are not exactly the same. For example, different antenna port groups include different numbers of antenna ports. These two antenna port groups may have at least one identical antenna port or may not have the same antenna port, which is not specifically limited here. For another example, different antenna port groups include the same number of antenna ports, but at least one antenna port is different.
  • the antenna port group may include Y first port groups, and the Y first port groups include X second port groups; wherein the ports in the first port group are ports included in the first CSI-RS resource, and the ports in the second port group are ports included in the second CSI-RS resource.
  • "at least one” means one or more, and “more” means two or more.
  • “And/or” describes the association relationship of the associated objects, indicating that there can be three relationships.
  • a and/or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.
  • the character “/” generally indicates that the associated objects before and after are an “or” relationship.
  • “At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items.
  • At least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b, and c, where a, b, and c can be single or multiple.
  • ordinal numbers such as “first” and “second” mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the size, content, order, timing, priority or importance of multiple objects.
  • first port group and the second port group are only used to distinguish different port groups, and do not indicate the difference in the position, index, priority or importance of the ports in the two port groups.
  • the embodiments of the present application provide a communication method and device for reducing the signaling overhead of CSI-RS resource configuration.
  • the method and the device are based on the same concept. Since the principles of solving the problem by the method and the device are similar, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.
  • the technical solutions provided in the embodiments of the present application can be applied to the fifth generation (5G) mobile communication system, such as the NR system, or to the long term evolution (LTE) system, or can also be applied to the next generation mobile communication system or other similar communication systems, without specific limitation.
  • 5G fifth generation
  • LTE long term evolution
  • FIG1C is a schematic diagram of the architecture of a communication system 1000 used in an embodiment of the present application.
  • the communication system includes a wireless access network 100 and a core network 200.
  • the communication system 1000 may also include the Internet 300.
  • the wireless access network 100 may include at least one network device (such as 110a and 110b in FIG1C ), and may also include at least one terminal (such as 120a-120j in FIG1C ).
  • the terminal is connected to the network device by wireless means, and the network device is connected to the core network by wireless or wired means.
  • the core network device and the network device may be independent and different physical devices, or the functions of the core network device and the logical functions of the network device may be integrated on the same physical device, or the functions of some core network devices and some network devices may be integrated on one physical device. Terminals and terminals and network devices and network devices may be connected to each other by wire or wireless means.
  • FIG1C is only a schematic diagram, and the communication system may also include other network devices, such as relay devices and backhaul devices, which are not drawn in FIG1C .
  • the network equipment can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), the next generation NodeB (gNB) in the fifth generation (5G) mobile communication system, the next generation base station in the sixth generation (6G) mobile communication system, a base station in a future mobile communication system or an access node in a WiFi system, etc.; it can also be a module or unit that completes part of the functions of a base station, for example, it can be a centralized unit (CU) or a distributed unit (DU).
  • eNodeB evolved NodeB
  • TRP transmission reception point
  • gNB next generation NodeB
  • 5G fifth generation
  • 6G sixth generation
  • a base station in a future mobile communication system or an access node in a WiFi system etc.
  • it can also be a module or unit that completes part of the functions of a base station, for example, it can be a centralized unit (CU) or a distributed unit (DU).
  • CU centralized unit
  • the CU completes the functions of the radio resource control protocol and the packet data convergence protocol (PDCP) of the base station, and can also complete the function of the service data adaptation protocol (SDAP);
  • the DU completes the functions of the radio link control layer and the medium access control (MAC) layer of the base station, and can also complete the functions of part of the physical layer or all of the physical layer.
  • 3GPP 3rd Generation Partnership Project
  • the network device can be a macro base station (such as 110a in Figure 1C), a micro base station or an indoor station (such as 110b in Figure 1C), or a relay node or a donor node.
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.
  • the terminal device may also be referred to as a terminal, UE, mobile station, mobile terminal, etc.
  • the terminal can be widely used in various scenarios, for example, device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), Internet of Things (IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc.
  • the terminal may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a robotic arm, a smart home device, etc.
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal.
  • the network devices and terminals can be fixed or movable.
  • the network devices and terminals can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on airplanes, balloons, and artificial satellites.
  • the embodiments of the present application do not limit the application scenarios of the network devices and terminals.
  • the helicopter or drone 120i in FIG. 1C can be configured as a mobile base station.
  • the terminals 120j that access the wireless access network 100 through 120i the terminals 120i are network devices; but for the network devices, the terminals 120i are network devices.
  • the terminals 120i are network devices.
  • device 110a, 120i is a terminal, that is, 110a and 120i communicate with each other through a wireless air interface protocol.
  • 110a and 120i can also communicate with each other through an interface protocol between network devices.
  • relative to 110a, 120i is also a network device. Therefore, network devices and terminals can be collectively referred to as communication devices.
  • 110a and 110b in FIG1C can be referred to as communication devices with network device functions
  • 120a-120j in FIG1C can be referred to as communication devices with terminal functions.
  • Network devices and terminals, network devices and network devices, and terminals and terminals can communicate through authorized spectrum, unlicensed spectrum, or both; can communicate through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz.
  • GHz gigahertz
  • the embodiments of the present application do not limit the spectrum resources used for wireless communication.
  • the functions of the network device may also be performed by a module (such as a chip) in a base station, or by a control subsystem including the network device function.
  • the control subsystem including the network device function here may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, smart transportation, and smart city.
  • the functions of the terminal may also be performed by a module (such as a chip or a modem) in the terminal, or by a device including the terminal function.
  • the network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application.
  • a person of ordinary skill in the art can appreciate that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
  • FIG. 2 it is a flow chart of a first communication method provided in an embodiment of the present application, and the method includes:
  • a network device sends configuration information of a first CSI-RS resource.
  • a terminal device receives the configuration information of the first CSI-RS resource.
  • the first CSI-RS resource includes M ports.
  • S202 The network device sends first information, where the first information indicates L ports among the M ports. Correspondingly, the terminal network device receives the first information.
  • the values of L and M are both positive integers, and the value of L is less than the value of M.
  • the first port to the L/2th port of the L ports are included in the first port to the M/2th port of the M ports, and the L/2+1th port to the Lth port of the L ports are included in the first port to the Mth port of the M/2+1 ports.
  • the L ports can include two polarization directions, the communication performance can be guaranteed, and the PMI specified in TS 38.214 can be used to feedback the channel state information.
  • the first port to the M/2th port among the M ports are ports in a first port matrix
  • the first port matrix includes N1 columns and N2 rows
  • R ports among the L ports are ports in a second port matrix
  • the second port matrix includes S columns and T rows
  • M and L are integer multiples of 2
  • R ports among the L ports are evenly distributed in the first port matrix.
  • the ports included in the S columns of the second port matrix may be ports included in continuous T rows in continuous S columns in the N1 column of the first port matrix, or the ports included in the S columns of the second port matrix may be ports included in T rows with equal intervals in continuous S columns in the N1 column of the first port matrix, or the ports included in the S columns of the second port matrix may be ports included in continuous T rows in evenly spaced S columns in the N1 column of the first port matrix, or the ports included in the S columns of the second port matrix may be ports included in T rows with equal intervals in evenly spaced S columns in the N1 column of the first port matrix.
  • the first port to the M/2th port among the M ports are ports in a first port matrix, the first port matrix includes N1 columns and N2 rows, the first port to the L/2th port among the L ports are ports in a second port matrix, the second port matrix includes N1' columns and N2' rows; M and L are integer multiples of 2; the first port to the L/2th port among the L ports (i.e., the ports included in the second port matrix) are evenly distributed in the first port matrix.
  • the ports included in the N1’ column of the second port matrix may be the ports included in the consecutive N2’ rows in the consecutive N1’ columns in the N1 column of the first port matrix, or the ports included in the N1’ column of the second port matrix may be the ports included in the equally spaced N2’ rows in the consecutive N1’ columns in the N1 column of the first port matrix, or the ports included in the N1’ column of the second port matrix may be the ports included in the consecutive N2’ rows in the equally spaced N1’ columns in the N1 column of the first port matrix, or the ports included in the N1’ column of the second port matrix may be the ports included in the equally spaced N2’ rows in the equally spaced N1’ columns in the N1 column of the first port matrix.
  • the (M/2+1)th port to the Mth port of the M ports are ports in a third port matrix
  • the third port matrix includes N1 columns and N2 rows
  • Q ports of the L ports are ports in a fourth port matrix
  • the fourth port matrix It includes S columns and T rows
  • M and L are integer multiples of 2
  • Q ports among the L ports are evenly distributed in the third port matrix.
  • the ports included in the S columns of the fourth port matrix are ports included in T rows in the continuous S columns in the N1 column of the third port matrix, or the ports included in the S columns of the fourth port matrix are ports included in T rows with equal intervals in the continuous S columns in the N1 column of the third port matrix, or the ports included in the S columns of the fourth port matrix are ports included in T rows in the continuous S columns with equal intervals in the N1 column of the third port matrix, or the ports included in the S columns of the fourth port matrix are ports included in T rows with equal intervals in the S columns with equal intervals in the N1 column of the third port matrix.
  • the (M/2+1)th port to the Mth port among the M ports are ports in a third port matrix
  • the third port matrix includes N1 columns and N2 rows
  • the (L/2+1)th port to the Lth port among the L ports are ports in a fourth port matrix
  • the fourth port matrix includes N1' columns and N2' rows
  • M and L are integer multiples of 2
  • the (L/2+1)th port to the Lth port among the L ports i.e., the ports included in the fourth port matrix) are evenly distributed in the third port matrix.
  • the ports included in the N1’ column of the fourth port matrix are the ports included in the consecutive N2’ rows in the consecutive N1’ columns in the N1 column of the third port matrix, or the ports included in the N1’ column of the fourth port matrix are the ports included in the equally spaced N2’ rows in the consecutive N1’ columns in the N1 column of the third port matrix, or the ports included in the N1’ column of the fourth port matrix are the ports included in the consecutive N2’ rows in the equally spaced N1’ columns in the N1 column of the third port matrix, or the ports included in the N1’ column of the fourth port matrix are the ports included in the equally spaced N2’ rows in the equally spaced N1’ columns in the N1 column of the third port matrix.
  • the first port matrix corresponding to the 1st port to the M/2th port among the M ports is M1
  • the second port matrix corresponding to the 1st port to the L/2th port among the L ports is L1
  • the third port matrix corresponding to the M/2+1th port to the Mth port among the M ports is M2
  • the fourth port matrix corresponding to the L/2+1th port to the Lth port among the L ports is L2
  • the ports included in the N1' column of the second port matrix may be the ports included in the consecutive N2' rows in the consecutive N1' columns in the N1 column of the first port matrix
  • the ports included in the N1' column of the fourth port matrix are the ports included in the consecutive N2' rows in the consecutive N1' columns in the N1 column of the third port matrix.
  • the first port matrix corresponding to the 1st port to the M/2th port among the M ports is M1
  • the second port matrix corresponding to the 1st port to the L/2th port among the L ports is L1
  • the third port matrix corresponding to the M/2+1th port to the Mth port among the M ports is M2
  • the fourth port matrix corresponding to the L/2+1th port to the Lth port among the L ports is L2
  • the ports included in the N1' column of the second port matrix may be the ports included in the continuous N2' rows in the equally spaced N1' columns in the N1 column of the first port matrix
  • the ports included in the N1' column of the fourth port matrix are the ports included in the continuous N2' rows in the equally spaced N1' columns in the N1 column of the third port matrix.
  • K is the interval between any two equally spaced columns in the N1′ columns in the N1 columns of the third port matrix or the first port matrix, and the value of K may be, for example, 2 or a value greater than 2.
  • the phases of the L ports are uniform, which can meet the conditions for using the PMI specified in TS 38.214 to feedback channel state information.
  • the first information may be any one of the following: cell-specific indication information, terminal device group-specific indication information, or terminal device-specific indication information.
  • the first information may include high-layer or physical layer signaling.
  • the first information includes but is not limited to at least one of a medium access control-control element (MAC CE), a downlink control information (DCI) command, and a radio resource control (RRC) signaling.
  • MAC CE medium access control-control element
  • DCI downlink control information
  • RRC radio resource control
  • the first information indicates specific implementations of L ports among the M ports, which will be described below.
  • the terminal device determines a second CSI-RS resource from the first CSI-RS resource according to the first information.
  • the second CSI-RS resource is a resource including the L ports in the first CSI-RS resource.
  • the network device indicates L ports among the M ports included in the first CSI-RS resource through the first information, so that the terminal device can determine the second CSI-RS resource corresponding to the L ports from the first CSI-RS resource according to the first information, and thus the network device does not need to set the configuration information of the second CSI-RS resource separately.
  • this scheme can save signaling overhead and improve resource utilization.
  • the channel state information can be determined based on the second CSI-RS resource.
  • the channel state information includes a CSI-RS resource index, and the CSI-RS resource index is an index of the first CSI-RS resource or an index of the second CSI-RS resource.
  • the channel state information further includes first channel quality information and second channel quality information, the first channel quality information corresponds to a first CSI-RS resource, and the second channel quality information corresponds to a second CSI-RS resource.
  • the channel state information includes a first rank indication (RI) and/or a second RI, the first RI corresponds to a first CSI-RS resource, and the second RI corresponds to a second CSI-RS resource.
  • RI rank indication
  • second RI corresponds to a second CSI-RS resource.
  • the channel state information includes an RI
  • the one RI corresponds to the first CSI-RS resource and the second CSI-RS resource. That is, the rank of the first CSI-RS resource is the same as the rank of the second CSI-RS resource.
  • the channel state information includes a first precoding matrix indication (PMI) and/or a second PMI, the first PMI corresponds to a first CSI-RS resource, and the second PMI corresponds to a second CSI-RS resource.
  • PMI precoding matrix indication
  • the first PMI corresponds to a first CSI-RS resource
  • the second PMI corresponds to a second CSI-RS resource.
  • the channel state information includes a PMI
  • the PMI corresponds to the first CSI-RS resource and the second CSI-RS resource. That is, the PMIs of the first CSI-RS resource and the second CSI-RS resource are the same. It should be understood that the fact that the PMIs of the first CSI-RS resource and the second CSI-RS resource are the same does not mean that the precoding matrices of the first CSI-RS resource and the second CSI-RS resource are the same.
  • the terminal can indicate the precoding matrix of the first CSI-RS resource or the second CSI-RS resource based on the one PMI through additional indication information.
  • the first channel quality information is determined based on a first precoding matrix
  • the second channel quality information is determined based on a second precoding matrix
  • the one PMI indicates the first precoding matrix
  • the second precoding matrix is determined based on the first precoding matrix.
  • the elements included in the second precoding are a subset of the elements included in the first precoding matrix, or the elements included in the second precoding are the product of a subset of the elements included in the first precoding matrix and a first coefficient, wherein the first coefficient may be predefined or indicated by a base station.
  • the first coefficient may be equal to The first RI corresponds to a first CSI-RS resource, and the second RI corresponds to a second CSI-RS resource.
  • the first information indicates that L ports among the M ports have multiple implementation modes, including but not limited to the following implementation modes:
  • the first information indicates L ports among the M ports, including but not limited to the following situations:
  • Case 1 M ports are ports included in A first CDM groups, and the first information indicates B second CDM groups in the A first CDM groups; accordingly, L ports are ports included in the B second CDM groups. That is, the terminal device can determine the L ports based on the B second CDM groups.
  • the values of A and B are positive integers, and the value of A is greater than or equal to the value of B.
  • CDM group 0 includes port 3000 to port 3003
  • CDM group 1 includes port 3004 to port 3007
  • CDM group 2 includes port 3008 to port 3011
  • CDM group 3 includes port 3012 to port
  • the L ports included in the second CSI-RS resource are port 3000-port 3003, port 3004-port 3007, port 3016-port 3019, port 3020-port 3023, and the four second CDM groups included in the second CSI-RS resource include CDM group 0, CDM group 1, CDM group 4 and CDM group 5, CDM group 0 includes port 3000 to port 3003, CDM group 1 includes port 3004 to port 3007, CDM group 4 includes port 3016 to port 3019, and CDM group 5 includes port 3020 to port 3023. Accordingly, the network device indicates CDM group 0, CDM group 1, CDM group 4 and CDM group 5 to the terminal device through the first information, and then the terminal device can determine the L ports according to CDM group 0, CDM group 1, CDM group 4 and CDM group 5.
  • Case 2 M ports are ports included in C first OCC codes, and the first information indicates ports included in D second OCC codes among the C first OCC codes; wherein L ports are ports included in D second OCC codes. That is, the terminal device can determine L ports according to D second OCC codes.
  • the ports included in the C first OCC codes can be understood as the ports including the first CSI-RS resource that use any of the C first OCC codes
  • the ports included in the D second OCC codes can be understood as the ports including the second CSI-RS resource that use any of the D second OCC codes.
  • the values of C and D are positive integers, and the value of C is greater than or equal to the value of D.
  • the network device indicates OCC0 and OCC2 to the terminal device through the first information, and then the terminal device can determine the L ports as port 3000, port 3004, port 3008, port 3012, port 3016, port 3020, port 3024, port 3028, port 3002, port 3006, port 3010, port 3014, port 3018, port 3022, port 3026, and port 3030 based on OCC0 and OCC2.
  • the first information may indicate the D second OCC codes by indicating the identifier or sequence of the OCC codes.
  • Case 3 M ports are ports included in C first OCC codes in A first CDM groups, and the first information indicates B second CDM groups in A first CDM groups and D second OCC codes in C first OCC codes; wherein L ports are ports included in D second OCC codes in B second CDM groups. That is, the terminal device can determine the L ports according to B second CDM groups and D second OCC codes.
  • ports included by C first OCC codes in A first CDM groups can be understood as ports among the ports included by A first CDM groups that use any first OCC code among C first OCC codes
  • ports included by D second OCC codes in B second CDM groups can be understood as ports among the ports included by B first CDM groups that use any second OCC code among D second OCC codes.
  • CDM group 4 includes port 3016 to port 3019
  • CDM group 5 includes port 3020 to port 3023
  • CDM group 6 includes port 3024 to port 3027
  • CDM group 7 includes port 3028 to port 3031
  • the C first OCC codes include OCC0, OCC1, OCC2, and OCC3 as shown in Figure 1B
  • the M ports are ports in which the OCC codes used in CDM group 0, CDM group 1, CDM group 2, CDM group 3, CDM group 4, CDM group 5, CDM group 6, and CDM group 7 are any one of OCC0, OCC1, OCC2, and OCC3.
  • the four second CDM groups included in the second CSI-RS resource include CDM group 0, CDM group 1, CDM group 4 and CDM group 5, CDM group 0 includes port 3000 to port 3003, CDM group 1 includes port 3004 to port 3007, CDM group 4 includes port 3016 to port 3019, and CDM group 5 includes port 3020 to port 3023;
  • the D second OCC codes include OCC0 and OCC2 as shown in FIG. 1B; accordingly, the L ports are ports whose OCC codes used in CDM group 0, CDM group 1 and CDM group 4 are OCC0 and OCC2.
  • the network device indicates CDM group 0, CDM group 1, CDM group 4, CDM group 5, and OCC0 and OCC2 to the terminal device through the first information, and then the terminal device can determine L ports from the ports included in CDM group 0, CDM group 1, CDM group 4 and CDM group 5 according to OCC0 and OCC2.
  • the terminal device is according to FIG. 5 6 , it can be determined that the L ports include port 3000 , port 3002 , port 3004 , port 3006 , port 3016 , port 3018 , port 3020 , and port 3022 .
  • the first information includes a first bitmap, the first bitmap indicating B second CDM groups among A first CDM groups; or, the first information is used to indicate the indexes of B second CDM groups among A first CDM groups.
  • one bit in the first bitmap is used to indicate one or more second CDM groups among the B second CDM groups.
  • a first CDM groups are CDM groups in a set of E first CDM groups; accordingly, the first information indicates B second CDM groups in A first CDM groups, including: the first information indicates F second CDM group sets where B second CDM groups are located; wherein the F second CDM group sets are a subset of the E first CDM group sets.
  • E first CDM group sets are obtained by pre-grouping A first CDM groups, and then the first information can implicitly indicate B second CDM groups in A first CDM groups by indicating F second CDM group sets where B second CDM groups in A first CDM groups are located; relative to the scheme of indicating each second CDM group in B second CDM groups one by one, the signaling overhead can be further reduced, thereby improving resource utilization.
  • the values of E and F are positive integers, and the value of E is greater than or equal to the value of F.
  • the E first CDM group sets may be obtained by grouping A first CDM groups according to the time domain resources or frequency domain resources included in the A first CDM groups. That is, different first CDM group sets include different time domain resources, or different first CDM group sets include different frequency domain resources.
  • the CDM groups with the same frequency domain resources in the 8 first CDM groups are divided into 1 first CDM group set, and 4 first CDM group sets can be obtained;
  • the 4 first CDM group sets include CDM group set 0, CDM group set 1, CDM group set 2, and CDM group set 3, wherein CDM group set 0 includes CDM group 0 and CDM group 4, CDM group set 1 includes CDM group 1 and CDM group 5, CDM group set 2 includes CDM group 2 and CDM group 6, and CDM group set 3 includes CDM group 3 and CDM group 7.
  • the B second CDM groups include CDM group 0 and CDM group 4, and the F second CDM group sets include CDM group set 0.
  • the network device indicates CDM group set 0 through the first information, that is, it can implicitly indicate CDM group 0 and CDM group 4 to the terminal device, and then the device can determine L ports based on CDM group 0 and CDM group 4.
  • the 8 first CDM groups included in the first CSI-RS resource are CDM group 0, CDM group 1, CDM group 2, CDM group 3, CDM group 4, CDM group 5, CDM group 6, and CDM group 7.
  • the CDM groups with the same time domain resources in the 8 first CDM groups are divided into 1 first CDM group set, and 2 first CDM group sets can be obtained; the 2 first CDM group sets include CDM group set 0 and CDM group set 1, wherein CDM group set 0 includes CDM group 0, CDM group 1, CDM group 2, and CDM group 3, and CDM group set 1 includes CDM group 4, CDM group 5, CDM group 6, and CDM group 7.
  • the B second CDM groups include CDM group 4, CDM group 5, CDM group 6, and CDM group 7, and the F second CDM group sets include CDM group set 1.
  • the network device indicates CDM group set 1 through the first information, that is, it can implicitly indicate CDM group 4, CDM group 5, CDM group 6 and CDM group 7 to the terminal device, and then the device can determine L ports based on CDM group 4, CDM group 5, CDM group 6 and CDM group 7.
  • the first information includes a second bitmap, which indicates D second OCC codes among C first OCC codes; or, the first information indicates the index of D second OCC codes among C first OCC codes; or, C first OCC codes belong to G first OCC code sets, D second OCC codes belong to H second OCC code sets, and H second OCC code sets are subsets of G first OCC code sets. Accordingly, the first information indicates the index of the H second OCC code sets where the D second OCC codes are located, and then the terminal device determines the D second OCC codes according to the index of the H second OCC code sets.
  • multiple ways of indicating the D second OCC codes are provided.
  • one bit in the second bitmap is used to indicate the index of one or more D second OCC codes among the D second OCC codes.
  • the values of G and H are positive integers, and the value of G is greater than or equal to the value of H.
  • the first information includes a first bit field and a second bit field; the first bit field indicates B second CMD groups in A first CDM groups, and the second bit field is used to indicate D second OCC codes in C first OCC codes; the terminal device determines L ports according to B second CMD groups in A first CDM groups and D second OCC codes in C first OCC codes.
  • the terminal device determines L ports according to A first B second CMD groups in the CDM group determine L ports.
  • the terminal device determines L ports according to B second CMD groups in A first CDM groups and D second OCC codes in C first OCC codes.
  • the M ports are ports included in the Y first port groups, and the first information indicates L ports among the M ports, including:
  • the first information indicates X second port groups in Y first port groups; accordingly, L ports are ports included in the X second port groups. That is, the terminal device can determine the L ports based on the X second port groups. In case 1, all ports in the X second port groups are indicated as L ports, so that the signaling design method is relatively simple.
  • the values of Y and X are positive integers, and the value of Y is greater than or equal to the value of X.
  • the first information indicates X second port groups out of Y first port groups, implicitly indicating L ports out of M ports, which can further reduce signaling overhead and thus improve resource utilization.
  • the Y first port groups include CSI-RS port group 0, CSI-RS port group 1, CSI-RS port group 2, and CSI-RS port group 3, and the X second port groups include CSI-RS port group 0 and CSI-RS port group 1.
  • the network device indicates CSI-RS port group 0 and CSI-RS port group 1 through the first information, and then after the terminal device receives the first information, it determines all ports in CSI-RS port group 0 and CSI-RS port group as L ports, that is, L ports are port 0-port 15.
  • the first information indicates X second port groups and the first pattern in the Y first port groups, and the first pattern indicates the ports in each of the X second port groups that belong to the second CSI-RS resource.
  • the ports in each second port group that belong to the second CSI-RS resource can be understood as the ports that belong to the L ports in each second port group. That is to say, the terminal device can determine the L ports based on the X second port groups and the first pattern.
  • the first information indicates the ports of the X second port groups that belong to the second CSI-RS resource in the form of the first pattern, so that the network device can flexibly configure the ports.
  • L ports out of the M ports are implicitly indicated, which can further reduce the signaling overhead and thus improve resource utilization.
  • the terminal device can determine L ports from the M ports according to CSI-RS port group 0, CSI-RS port group 1, and the first pattern, and the L ports include port 0, port 1, port 2, and port 3.
  • the first pattern can indicate 2 ports in CSI-RS port group 0, 2 ports in CSI-RS port group 1, 2 ports in CSI-RS port group 2, and 2 ports in CSI-RS port group 3; then the terminal device can determine L ports from M ports according to CSI-RS port group 0, CSI-RS port group 1, CSI-RS port group 2, CSI-RS port group 3, and the first pattern, and the L ports include port 0, port 1, port 2, port 3, port 16, port 17, port 18, and port 19.
  • the first information indicates a first pattern
  • the first pattern indicates the ports belonging to the second CSI-RS resource in each of the Y first port groups.
  • the ports belonging to the second CSI-RS resource in each first port group can be understood as the ports belonging to the L ports in each first port group. That is to say, the terminal device can determine the L ports according to the first pattern.
  • the first information implicitly indicates the ports belonging to the second CSI-RS resource in the Y first port groups by means of the first pattern, which further enables the network device to flexibly configure the ports.
  • the first information indicates that the first pattern indicates that the port belonging to the L ports in each of the Y second port groups is 1; the Y first port groups include CSI-RS port group 0, CSI-RS port group 1, CSI-RS port group 2, and CSI-RS port group 3, and accordingly, the first pattern indicates 1 port in CSI-RS port group 0, CSI-RS 1 port in port group 1, 1 port in CSI-RS port group 2, and 1 port in CSI-RS port group 3; after the network device indicates the first pattern through the first information, the terminal device can determine L ports from the M ports according to the first pattern, and the L ports include port 0, port 1, port 16, and port 17.
  • the first information indicates X second port groups among the Y first port groups; further, when the first information indicates X second port groups among the Y first port groups, the terminal device can determine L ports according to the X second port groups and a predefined first pattern, and the first pattern indicates a port belonging to the second CSI-RS resource in each of the X second port groups. In case 4, L ports are determined according to the predefined first pattern and the X second port groups indicated by the first information.
  • the predefined first pattern indicates that the port belonging to the L ports in each of the X second port groups is 1;
  • the Y first port groups include CSI-RS port group 0, CSI-RS port group 1, CSI-RS port group 2, and CSI-RS port group 3, and
  • the X second port groups include CSI-RS port group 0, CSI-RS port group 1, and CSI-RS port group 2.
  • the first pattern indicates CSI-RS 1 port in S port group 0, 1 port in CSI-RS port group 1, and 1 port in CSI-RS port group 2; the network device indicates CSI-RS port group 0, CSI-RS port group 1, and CSI-RS port group 2 through the first information; and then the terminal device can determine L ports from M ports according to CSI-RS port group 0, CSI-RS port group 1, and CSI-RS port group 2, and a predefined first pattern, and the L ports include port 0, port 1, and port 16.
  • the Y first port groups are obtained by dividing the M ports, and there are multiple implementation modes for grouping the M ports, including but not limited to the following modes:
  • the first dimension and the second dimension belong to the first codebook, which is the codebook used when calculating the precoding matrix on the first CSI-RS resource; accordingly, N1 is the number of CSI-RS ports included in the first dimension in the first codebook, and N2 is the number of CSI-RS ports included in the second dimension in the first codebook.
  • the first dimension and the second dimension are the dimensions of the first spatial basis vector (the first spatial basis vector may be the v vector specified in TS 38.214), and the first spatial basis vector is used to determine the precoding matrix on the first CSI-RS resource.
  • the two first port groups include port group 0 and port group 3, wherein port group 0 includes port 0, port 2, port 4, port 6, port 8, port 10, port 12, and port 14, as well as port 16, port 18, port 20, port 22, port 24, port 26, port 28, and port 30, and port group 1 includes port 1, port 3, port 5, port 7, port 9, port 11, port 13, and port 15, as well as port 17, port 19, port 21, port 23, port 25, port 27, port 29, and port 31.
  • the ports with the same value of i in the port index among the M ports are divided into a first port group, and 8 first port groups can be obtained.
  • These 8 first port groups include port group 0, port group 1, port group 2, port group 3, port group 4, port group 5, port group 6, and port group 7.
  • the M ports are ports in a first port matrix and a second port matrix
  • the first port matrix includes the first port to the M/2th port among the M ports
  • the second port matrix includes the (M/2+1)th port to the Mth port among the M ports
  • the first port matrix includes N1 columns and N2 rows
  • the second port matrix includes N1 columns and N2 rows
  • N1 is the number of ports included in the first CSI-RS resource in the first dimension
  • N2 is the number of ports included in the first CSI-RS resource in the second dimension
  • the Y first port groups are obtained by dividing the ports in the first port matrix and the second port matrix, and the G ports included in each of the Y first port groups meet a preset condition; wherein the preset condition is that the G ports have the same row coordinates or column coordinates in the first port matrix, or the G ports have the same row coordinates or column coordinates in the second port matrix, or the G ports are ports with the same row coordinates or column coordinates in the first port matrix and the second port matrix
  • M 32
  • the first port matrix corresponding to the 1st port to the M/2th port among the M ports is M1
  • the second port matrix corresponding to the M/2+1th port to the Mth port among the M ports is M2
  • M1 and M2 are as follows:
  • Implementation method three the number of ports included in the first dimension of the first CSI-RS resource is N1, and the number of ports included in the second dimension of the first CSI-RS resource is N2; the first information indicates L ports out of M ports, including: the first information indicates N1’ and N2’; wherein N1’ is the number of ports of the second CSI-RS resource in the first dimension, and N2’ is the number of ports of the second CSI-RS resource in the second dimension; accordingly, the terminal device can determine the L ports according to N1’, N2’, N1 and N2. In this way, the first information implicitly indicates L ports out of M ports by indicating N1’ and N2’, which can further reduce signaling overhead and thus improve resource utilization.
  • N1 and N2 may be preset, or may be indicated by the network device to the terminal device.
  • the terminal device may also receive second information, and the second information indicates N1 and N2.
  • the first information may also indicate N1 and N2. It should be understood that when the first information indicates N1, N2, N1' and N2', N1 and N2 may be indicated by the first bit field in the first information, and N1' and N2' may be indicated by the second bit field in the first information.
  • the first port to the L/2th port of the L ports are included in the first port to the M/2th port of the M ports, and the L/2+1th port to the Lth port of the L ports are included in the first port to the Mth port of the M/2+1 ports.
  • the L ports are evenly distributed among the M ports; or In other words, the L ports satisfy the equal phase interval among the M ports.
  • the first port to the M/2th port among the M ports are ports in a first port matrix, the first port matrix includes N1 columns and N2 rows, the first port to the L/2th port among the L ports are ports in a second port matrix, the second port matrix includes N1' columns and N2' rows; M and L are integer multiples of 2; the first port to the L/2th port among the L ports (i.e., the ports included in the second port matrix) are evenly distributed in the first port matrix.
  • the ports included in the N1' column of the second port matrix are the ports included in the continuous N2' rows in the continuous N1' columns in the N1 column of the first port matrix, or the ports included in the N1' column of the second port matrix are the ports included in the equally spaced N2' rows in the continuous N1' columns in the N1 column of the first port matrix, or the ports included in the N1' column of the second port matrix are the ports included in the continuous N2' rows in the equally spaced N1' columns in the N1 column of the first port matrix, or the ports included in the N1' column of the second port matrix are the ports included in the equally spaced N2' rows in the equally spaced N1' columns in the N1 column of the first port matrix.
  • the terminal device can flexibly determine the first port to the L/2th port among the first port to the M/2th port among the M ports based on N1', N2', N1 and N2.
  • the (M/2+1)th port to the Mth port among the M ports are ports in a third port matrix
  • the third port matrix includes N1 columns and N2 rows
  • the (L/2+1)th port to the Lth port among the L ports are ports in a fourth port matrix
  • the fourth port matrix includes N1' columns and N2' rows
  • M and L are integer multiples of 2
  • the (L/2+1)th port to the Lth port among the L ports i.e., the ports included in the fourth port matrix) are evenly distributed in the third port matrix.
  • the ports included in the N1' column of the fourth port matrix are the ports included in the continuous N2' rows in the continuous N1' columns in the N1 column of the third port matrix, or the ports included in the N1' column of the fourth port matrix are the ports included in the equally spaced N2' rows in the continuous N1' columns in the N1 column of the third port matrix, or the ports included in the N1' column of the fourth port matrix are the ports included in the continuous N2' rows in the equally spaced N1' columns in the N1 column of the third port matrix, or the ports included in the N1' column of the fourth port matrix are the ports included in the equally spaced N2' rows in the equally spaced N1' columns in the N1 column of the third port matrix.
  • the terminal device can flexibly determine the (L/2+1)th port to the Lth port among the (M/2+1)th port to the Mth port among the M ports according to N1', N2', N1 and N2.
  • each port in the M ports is identified as M ij
  • the first port matrix corresponding to the 1st port to the M/2th port among the M ports is M1
  • the second port matrix corresponding to the 1st port to the L/2th port among the L ports is L1
  • the third port matrix corresponding to the M/2+1th port to the Mth port among the M ports is M2
  • the fourth port matrix corresponding to the L/2+1th port to the Lth port among the L ports is L2
  • the ports included in the N1' column of the second port matrix may be the ports included in the consecutive N2' rows in the consecutive N1' columns in the N1 column of the first port matrix
  • the ports included in the N1' column of the fourth port matrix are the ports included in the consecutive N2' rows in the consecutive N1' columns in the N1 column of the third port matrix.
  • the first port matrix corresponding to the 1st port to the M/2th port among the M ports is M1
  • the second port matrix corresponding to the 1st port to the L/2th port among the L ports is L1
  • the third port matrix corresponding to the M/2+1th port to the Mth port among the M ports is M2
  • the fourth port matrix corresponding to the L/2+1th port to the Lth port among the L ports is L2
  • the ports included in the N1' column of the second port matrix may be the ports included in the continuous N2' rows in the equally spaced N1' columns in the N1 column of the first port matrix
  • the ports included in the N1' column of the fourth port matrix are the ports included in the continuous N2' rows in the equally spaced N1' columns in the N1 column of the third port matrix.
  • K is the interval between any two equally spaced columns in the N1' columns in the N1 columns of the third port matrix or the first port matrix, and the value of K may be, for example, 2 or a value greater than 2.
  • the phases of the L ports are uniform, which can meet the conditions for using the PMI specified in TS 38.214 to feedback the channel state information. Accordingly, the terminal device can determine the second port matrix L1 in the first port matrix M1 according to the values of N1' and N2'; and the terminal device can determine the second port matrix L2 in the first port matrix M2 according to the values of N1' and N2'.
  • the first information indicates N1’ and N2’, including: the first information is the first index in the first index table, the first index indicates N1’ and N2’, the first index table includes multiple indexes, and each index in the multiple indexes indicates a value of N1’ and N2’.
  • the first information implicitly indicates the values of N1’ and N2’ by indicating the first index in the first index table, which can further reduce signaling overhead, thereby improving resource utilization.
  • the first index table is shown in Table 2.
  • FIG. 16 shows a schematic diagram of a flow chart of a second communication method provided in an embodiment of the present application, the method comprising:
  • a network device sends a first signaling indicating configuration information of a first CSI-RS resource.
  • a terminal device receives the configuration information of the first CSI-RS resource.
  • the configuration information of the first CSI-RS resource includes a dedicated configuration of the first CSI-RS resource and a common configuration of the first CSI-RS and the second CSI-RS resource; and the second configuration information includes dedicated configuration information of the second CSI-RS resource.
  • the common configuration of the first CSI-RS and the second CSI-RS resources may include at least one of the following: the CDM group type corresponding to the CSI-RS resource, the resource block carrying the CSI-RS resource, the frequency domain density of the CSI-RS resource, the first period of the CSI-RS resource, the time slot carrying the CSI-RS resource in the first period, the scrambling code corresponding to the CSI-RS resource, the power control offset, and the power control offset relative to the synchronization signal.
  • the dedicated configuration information of the first CSI-RS resource may include at least one of the following: M CSI-RS ports corresponding to the first CSI-RS resource, the number of ports of the first CSI-RS resource, the subcarrier used to carry the first CSI-RS resource, and the OFDM symbol used to carry the first CSI-RS resource.
  • the network device sends a second signaling, where the second signaling indicates a portion of configuration information of a second CSI-RS resource.
  • the terminal device receives a portion of configuration information of the second CSI-RS resource.
  • part of the configuration information of the second CSI-RS resource may include at least one item: L CSI-RS ports corresponding to the second CSI-RS resource, the number of ports of the second CSI-RS resource, the subcarrier used to carry the second CSI-RS resource, and the OFDM symbol used to carry the second CSI-RS resource.
  • the terminal device determines the second CSI-RS resource according to the configuration information of the first CSI-RS resource and part of the configuration information of the second CSI-RS resource.
  • the terminal device can determine the second CSI-RS resource based on the configuration information of the first CSI-RS resource and a part of the configuration information of the second CSI-RS resource, thereby effectively reducing the signaling overhead of the first CSI-RS resource configuration and improving resource utilization.
  • the terminal device determines the second CSI-RS resource based on the configuration information of the first CSI-RS resource and part of the configuration information of the second CSI-RS resource, including: the terminal device determines the second CSI-RS resource based on the common configuration of the first CSI-RS and the second CSI-RS resources, and part of the configuration information of the second CSI-RS resource.
  • the terminal device determines the second CSI-RS resource based on the CDM group type corresponding to the CSI-RS resource, the resource block carrying the CSI-RS resource, the frequency domain density of the CSI-RS resource, the first period of the CSI-RS resource, the time slot carrying the CSI-RS resource within the first period, the scrambling code corresponding to the CSI-RS resource, the power control offset, the power control offset relative to the synchronization signal, and the L CSI-RS ports corresponding to the second CSI-RS resource, the number of ports of the second CSI-RS resource, the subcarrier used to carry the second CSI-RS resource, and the OFDM symbol used to carry the second CSI-RS resource.
  • the terminal device determines the second CSI-RS resource based on the CDM group type corresponding to the CSI-RS resource, the resource block carrying the CSI-RS resource, the frequency domain density of the CSI-RS resource, the first period of the CSI-RS resource, the time slot carrying the CSI-RS resource in the first period, the scrambling code corresponding to the CSI-RS resource, the L CSI-RS ports corresponding to the second CSI-RS resource, the number of ports of the second CSI-RS resource, the subcarrier used to carry the second CSI-RS resource, and the OFDM symbol used to carry the second CSI-RS resource.
  • the network device may also send first information to the terminal device, where the first information indicates that the second CSI-RS resource is a resource belonging to L CSI-RS ports in the first CSI-RS resource. Accordingly, the terminal device receives the first information. In this way, the terminal device can determine the first CSI-RS resource in the second CSI-RS resource.
  • an embodiment of the present application provides a communication device, the structure of which may be as shown in FIG. 17 , including a communication module 1701 and a processing module 1702 .
  • each functional module in each embodiment of the present application may be integrated into a processor, or may exist physically separately, or two or more modules may be integrated into one module.
  • the above-mentioned integrated modules may be implemented in the form of hardware or in the form of software functional modules. It is understood that the functions or implementations of each module in the embodiments of the present application may further refer to the relevant description of the method embodiment.
  • the communication device can be specifically used to implement the method executed by the terminal device in the embodiment of Figure 2.
  • the device can be the terminal device itself, or it can be a chip or chipset in the terminal device or a part of the chip used to execute the function of the relevant method.
  • the communication module 1701 is used to receive configuration information of a first channel state information reference signal CSI-RS resource, and the first CSI-RS resource includes M ports; receive first information, and the first information indicates L ports out of the M ports.
  • the processing module 1702 is used to determine the second CSI-RS resource from the first CSI-RS resource based on the first information.
  • M is an integer greater than 1.
  • the first information may include high-layer or physical layer signaling.
  • the first information includes but is not limited to at least one of a medium access control-control element (MAC CE), a downlink control information (DCI) command, and a radio resource control (RRC) signaling.
  • MAC CE medium access control-control element
  • DCI downlink control information
  • RRC radio resource control
  • the first information indicates that L ports among the M ports have multiple implementation modes, including but not limited to the following implementation modes:
  • the first information indicates L ports among M ports, including:
  • Case 1 the M ports are ports included in the A first code division multiplexing CDM groups, and the first information indicates the B second CDM groups in the A first CDM groups; accordingly, the L ports are ports included in the B second CDM groups. That is, the processing module 1702 can determine the L ports according to the B second CDM groups.
  • Case 2 M ports are ports included in C first orthogonal cover codes OCC codes, and the first information indicates ports included in D second OCC codes among the C first OCC codes; wherein L ports are ports included in the D second OCC codes. That is, the processing module 1702 can determine L ports according to the D second OCC codes.
  • Case 3 M ports are ports included in C first OCC codes in A first CDM groups, and the first information indicates B second CDM groups in A first CDM groups and D second OCC codes in C first OCC codes; wherein L ports are ports included in D second OCC codes in B second CDM groups. That is, the processing module 1702 can determine the L ports according to the B second CDM groups and the D second OCC codes.
  • the first information includes a first bit map, which indicates B second CDM groups among A first CDM groups; or, the first information is used to indicate indexes of B second CDM groups among A first CDM groups.
  • the M ports are ports included in A first CDM groups, and the A first CDM groups are CDM groups in a set of E first CDM groups; accordingly, the first information indicates B second CDM groups in the A first CDM groups, including: the first information indicates the F second CDM group sets to which the B second CDM groups are located; wherein the F second CDM group sets are a subset of the E first CDM group sets.
  • the E first CDM group sets may be obtained by grouping A first CDM groups according to the time domain resources or frequency domain resources included in the A first CDM groups. That is, different first CDM group sets include different time domain resources, or different first CDM group sets include different frequency domain resources.
  • the first information includes a second bit map, which indicates D second OCC codes among C first OCC codes; or, the first information indicates the indexes of D second OCC codes among C first OCC codes; or, the C first OCC codes belong to G first OCC code sets, the D second OCC codes belong to H second OCC code sets, and the H second OCC code sets are subsets of the G first OCC code sets. Accordingly, the first information indicates the indexes of the H second OCC code sets to which the D second OCC codes belong, and then the terminal device determines the D second OCC codes based on the indexes of the H second OCC code sets.
  • the M ports are ports included in the Y first port groups, and the first information indicates L ports among the M ports, including:
  • Case 1 the first information indicates X second port groups among the Y first port groups; accordingly, the L ports are ports included in the X second port groups. That is, the processing module 1702 can determine the L ports according to the X second port groups.
  • the first information indicates X second port groups in the Y first port groups and the first pattern
  • the first pattern indicates the ports belonging to the second CSI-RS resource in each of the X second port groups. That is, the processing module 1702 determines L ports according to the X second port groups and the first pattern.
  • the first information indicates a first pattern
  • the first pattern indicates ports belonging to the second CSI-RS resource in each of the Y first port groups.
  • the processing module 1702 may determine L ports according to the first pattern.
  • the first information indicates X second port groups among the Y first port groups; further, when the first information indicates X second port groups among the Y first port groups, the processing module 1702 can determine L ports according to the X second port groups and a predefined first pattern, and the first pattern indicates a port belonging to the second CSI-RS resource in each second port group among the X second port groups.
  • the Y first port groups are obtained by dividing the M ports, and there are multiple implementation methods for grouping the M ports, including but not limited to the following methods:
  • the first dimension and the second dimension belong to the first codebook structure, and the first codebook structure is the codebook structure used when calculating the precoding matrix on the first CSI-RS resource; accordingly, N1 is the number of CSI-RS ports included in the first dimension in the first codebook structure, and N2 is The number of CSI-RS ports included in the second dimension in the first codebook structure.
  • the first dimension and the second dimension are dimensions of a first spatial basis vector, and the first spatial basis vector is used to determine a precoding matrix on the first CSI-RS resource.
  • the M ports are ports in a first port matrix and a second port matrix
  • the first port matrix includes the first port to the M/2th port among the M ports
  • the second port matrix includes the (M/2+1)th port to the Mth port among the M ports
  • the first port matrix includes N1 columns and N2 rows
  • the second port matrix includes N1 columns and N2 rows
  • N1 is the number of ports included in the first CSI-RS resource in the first dimension
  • N2 is the number of ports included in the first CSI-RS resource in the second dimension
  • the Y first port groups are obtained by dividing the ports in the first port matrix and the second port matrix, and the G ports included in each of the Y first port groups meet a preset condition; wherein the preset condition is that the G ports have the same row coordinates or column coordinates in the first port matrix, or the G ports have the same row coordinates or column coordinates in the second port matrix, or the G ports are ports with the same row coordinates or column coordinates in the first port matrix and the second port matrix
  • the number of ports included in the first dimension of the first CSI-RS resource is N1, and the number of ports included in the second dimension of the first CSI-RS resource is N2;
  • the first information indicates L ports out of the M ports, including: the first information indicates N1’ and N2’; wherein N1’ is the number of ports of the second CSI-RS resource in the first dimension, and N2’ is the number of ports of the second CSI-RS resource in the second dimension; accordingly, the processing module 1702 can determine the L ports based on N1’, N2’, N1 and N2.
  • N1 and N2 may be preset, or may be indicated by the network device to the terminal device.
  • the terminal device may also receive second information, and the second information indicates N1 and N2.
  • the first information may also indicate N1 and N2. It should be understood that when the first information indicates N1, N2, N1' and N2', N1 and N2 may be indicated by the first bit field in the first information, and N1' and N2' may be indicated by the second bit field in the first information.
  • the L ports are evenly distributed among the M ports; or, the L ports are evenly spaced in phase among the M ports.
  • the first port to the M/2th port among the M ports are ports in a first port matrix
  • the first port matrix includes N1 columns and N2 rows
  • the first port to the L/2th port among the L ports are ports in a second port matrix
  • the second port matrix includes N1' columns and N2' rows
  • M and L are integer multiples of 2
  • the first port to the L/2th port among the L ports i.e., the ports included in the second port matrix
  • the ports included in the N1' column of the second port matrix are the ports included in the continuous N2' rows in the continuous N1' columns in the N1 column of the first port matrix, or the ports included in the N1' column of the second port matrix are the ports included in the equally spaced N2' rows in the continuous N1' columns in the N1 column of the first port matrix, or the ports included in the N1' column of the second port matrix are the ports included in the continuous N2' rows in the equally spaced N1' columns in the N1 column of the first port matrix, or the ports included in the N1' column of the second port matrix are the ports included in the equally spaced N2' rows in the equally spaced N1' columns in the N1 column of the first port matrix.
  • the processing module 1702 can flexibly determine the first port to the L/2th port in the L ports from the first port to the M/2th port according to N1', N2', N1 and N2.
  • the (M/2+1)th port to the Mth port among the M ports are ports in a third port matrix
  • the third port matrix includes N1 columns and N2 rows
  • the (L/2+1)th port to the Lth port among the L ports are ports in a fourth port matrix
  • the fourth port matrix includes N1' columns and N2' rows
  • M and L are integer multiples of 2
  • the (L/2+1)th port to the Lth port among the L ports i.e., the ports included in the fourth port matrix) are evenly distributed in the third port matrix.
  • the ports included in the N1' column of the fourth port matrix are the ports included in the continuous N2' rows in the continuous N1' columns in the N1 column of the third port matrix, or the ports included in the N1' column of the fourth port matrix are the ports included in the equally spaced N2' rows in the continuous N1' columns in the N1 column of the third port matrix, or the ports included in the N1' column of the fourth port matrix are the ports included in the continuous N2' rows in the equally spaced N1' columns in the N1 column of the third port matrix, or the ports included in the N1' column of the fourth port matrix are the ports included in the equally spaced N2' rows in the equally spaced N1' columns in the N1 column of the third port matrix.
  • the processing module 1702 can flexibly determine the L/2+1th port to the Lth port in the M/2+1th port to the Mth port of the M ports according to N1', N2', N1 and N2.
  • the identifier of each port in the M ports is M ij
  • the first information indicates N1' and N2', including: the first information is a first index in a first index table, the first index indicates N1' and N2', the first index table includes multiple indexes, each of the multiple indexes indicates a value of N1' and a value of N2'.
  • the first information is any one of the following: cell-specific indication information, terminal device group-specific indication information, or terminal device-specific indication information.
  • the communication device can be specifically used to implement the method executed by the network device in the embodiment of Figure 2.
  • the device can be the network device itself, or a chip or circuit in the network device or a part of the chip used to execute the function of the related method.
  • the communication module 1701 is used to send configuration information of the first channel state information reference signal CSI-RS resource, and the first CSI-RS resource includes M ports; and the communication module 1701 is also used to send first information, and the first information indicates L ports among the M ports; wherein the resources belonging to the L ports in the first CSI-RS resource are the second CSI-RS resources.
  • the first information may include high-layer or physical layer signaling.
  • the first information includes but is not limited to at least one of a medium access control-control element (MAC CE), a downlink control information (DCI) command, and a radio resource control (RRC) signaling.
  • MAC CE medium access control-control element
  • DCI downlink control information
  • RRC radio resource control
  • the first information indicates that L ports among the M ports have multiple implementation modes, including but not limited to the following implementation modes:
  • the first information indicates L ports among M ports, including:
  • Case 1 the M ports are ports included in A first code division multiplexing CDM groups, and the first information indicates B second CDM groups in the A first CDM groups; correspondingly, the L ports are ports included in the B second CDM groups.
  • Case 2 the M ports are ports included in the C first orthogonal cover codes OCC codes, and the first information indicates ports included in the D second OCC codes among the C first OCC codes; wherein the L ports are ports included in the D second OCC codes.
  • the M ports are ports included by the C first OCC codes in the A first CDM groups, and the first information indicates the B second CDM groups in the A first CDM groups and the D second OCC codes in the C first OCC codes; wherein, the L ports are ports included by the D second OCC codes in the B second CDM groups.
  • the first information includes a first bit map, which indicates B second CDM groups among A first CDM groups; or, the first information is used to indicate indexes of B second CDM groups among A first CDM groups.
  • the M ports are ports included in A first CDM groups, and the A first CDM groups are CDM groups in a set of E first CDM groups; accordingly, the first information indicates B second CDM groups in the A first CDM groups, including: the first information indicates the F second CDM group sets to which the B second CDM groups are located; wherein the F second CDM group sets are a subset of the E first CDM group sets.
  • the E first CDM group sets may be obtained by grouping A first CDM groups according to the time domain resources or frequency domain resources included in the A first CDM groups. That is, different first CDM group sets include different time domain resources, or different first CDM group sets include different frequency domain resources.
  • the first information includes a second bit map, which indicates D second OCC codes among C first OCC codes; or, the first information indicates the indexes of D second OCC codes among C first OCC codes; or, the C first OCC codes belong to G first OCC code sets, the D second OCC codes belong to H second OCC code sets, and the H second OCC code sets are subsets of the G first OCC code sets. Accordingly, the first information indicates the indexes of the H second OCC code sets to which the D second OCC codes belong, and then the terminal device determines the D second OCC codes based on the indexes of the H second OCC code sets.
  • the M ports are ports included in the Y first port groups, and the first information indicates L ports among the M ports, including:
  • Case 1 the first information indicates X second port groups among the Y first port groups; accordingly, the L ports are ports included in the X second port groups.
  • the first information indicates X second port groups in Y first port groups and a first pattern
  • the first pattern indicates the ports belonging to the second CSI-RS resource in each of the X second port groups.
  • the ports belonging to the second CSI-RS resource in each second port group can be understood as the ports belonging to the L ports in each second port group.
  • the first information indicates a first pattern
  • the first pattern indicates a port belonging to the second CSI-RS resource in each of the Y first port groups.
  • a port belonging to the second CSI-RS resource in each first port group can be understood as a port belonging to the L ports in each first port group.
  • the first information indicates X second port groups among Y first port groups; wherein the X second port groups and the predefined first pattern are used to determine L ports, and the first pattern indicates the ports belonging to the second CSI-RS resource in each of the X second port groups.
  • the Y first port groups are obtained by dividing the M ports, and there are multiple implementation modes for grouping the M ports, including but not limited to the following modes:
  • the M ports are ports in a first port matrix and a second port matrix
  • the first port matrix includes the first port to the M/2th port among the M ports
  • the second port matrix includes the (M/2+1)th port to the Mth port among the M ports
  • the first port matrix includes N1 columns and N2 rows
  • the second port matrix includes N1 columns and N2 rows
  • N1 is the number of ports included in the first CSI-RS resource in the first dimension
  • N2 is the number of ports included in the first CSI-RS resource in the second dimension
  • the Y first port groups are obtained by dividing the ports in the first port matrix and the second port matrix, and the G ports included in each of the Y first port groups meet a preset condition; wherein the preset condition is that the G ports have the same row coordinates or column coordinates in the first port matrix, or the G ports have the same row coordinates or column coordinates in the second port matrix, or the G ports are ports with the same row coordinates or column coordinates in the first port matrix and the second port matrix
  • the number of ports included in the first dimension of the first CSI-RS resource is N1
  • the number of ports included in the second dimension of the first CSI-RS resource is N2
  • the first information indicates L ports out of the M ports, including: the first information indicates N1’ and N2’; wherein N1’ is the number of ports of the second CSI-RS resource in the first dimension, and N2’ is the number of ports of the second CSI-RS resource in the second dimension; wherein N1’, N2’, N1 and N2 are used to determine the L ports.
  • N1 and N2 may be preset, or may be indicated by the network device to the terminal device.
  • the terminal device may also receive second information, and the second information indicates N1 and N2.
  • the first information may also indicate N1 and N2. It should be understood that when the first information indicates N1, N2, N1' and N2', N1 and N2 may be indicated by the first bit field in the first information, and N1' and N2' may be indicated by the second bit field in the first information.
  • the L ports are evenly distributed among the M ports; or, the L ports are evenly spaced in phase among the M ports.
  • the first port to the M/2th port among the M ports are ports in a first port matrix
  • the first port matrix includes N1 columns and N2 rows
  • the first port to the L/2th port among the L ports are ports in a second port matrix
  • the second port matrix includes N1' columns and N2' rows
  • M and L are integer multiples of 2
  • the first port to the L/2th port among the L ports are evenly distributed in the first port matrix.
  • the ports included in the N1’ column of the second port matrix are the ports included in the consecutive N2’ rows in the consecutive N1’ columns in the N1 column of the first port matrix, or the ports included in the N1’ column of the second port matrix are the ports included in the equally spaced N2’ rows in the consecutive N1’ columns in the N1 column of the first port matrix, or the ports included in the N1’ column of the second port matrix are the ports included in the consecutive N2’ rows in the equally spaced N1’ columns in the N1 column of the first port matrix, or the ports included in the N1’ column of the second port matrix are the ports included in the equally spaced N2’ rows in the equally spaced N1’ columns in the N1 column of the first port matrix.
  • the (M/2+1)th port to the Mth port among the M ports are ports in a third port matrix
  • the third port matrix includes N1 columns and N2 rows
  • the (L/2+1)th port to the Lth port among the L ports are ports in a fourth port matrix
  • the fourth port matrix includes N1' columns and N2'rows
  • M and L are integer multiples of 2
  • the (L/2+1)th port to the Lth port among the L ports i.e., the ports included in the fourth port matrix) are evenly distributed in the third port matrix.
  • the ports included in the N1' column of the fourth port matrix are ports included in consecutive N2' rows in consecutive N1' columns in the N1 column of the third port matrix, or the ports included in the N1' column of the fourth port matrix are ports included in consecutive N2' rows with equal intervals in consecutive N1' columns in the N1 column of the third port matrix.
  • the ports, or the ports included in the N1' column of the fourth port matrix are the ports included in the consecutive N2' rows in the equally spaced N1' columns in the N1 column of the third port matrix, or the ports included in the N1' column of the fourth port matrix are the ports included in the equally spaced N2' rows in the equally spaced N1' columns in the N1 column of the third port matrix.
  • the first information indicates N1’ and N2’, including: the first information is the first index in the first index table, the first index indicates N1’ and N2’, the first index table includes multiple indexes, each of the multiple indexes indicates a value of N1’ and N2’.
  • the first information is any one of the following: cell-specific indication information, terminal device group-specific indication information, or terminal device-specific indication information.
  • the communication device can be specifically used to implement the method executed by the terminal device in the embodiment of Figure 16.
  • the device can be the terminal device itself, or a chip or chipset in the terminal device or a part of the chip used to execute the function of the related method.
  • the communication module 1701 is used to receive a first signaling, which indicates the configuration information of the first CSI-RS resource; and, receive a second signaling, which indicates a part of the configuration information of the second CSI-RS resource.
  • the processing module 1702 is used to determine the second CSI-RS resource based on the configuration information of the first CSI-RS resource and the part of the configuration information of the second CSI-RS resource.
  • the configuration information of the first CSI-RS resource includes a dedicated configuration of the first CSI-RS resource and a common configuration of the first CSI-RS and the second CSI-RS resource; and the second configuration information includes dedicated configuration information of the second CSI-RS resource.
  • the common configuration of the first CSI-RS and the second CSI-RS resources may include at least one of the following: the CDM group type corresponding to the CSI-RS resource, the resource block carrying the CSI-RS resource, the frequency domain density of the CSI-RS resource, the first period of the CSI-RS resource, the time slot carrying the CSI-RS resource in the first period, the scrambling code corresponding to the CSI-RS resource, the power control offset, and the power control offset relative to the synchronization signal.
  • the dedicated configuration of the first CSI-RS resource may include at least one of the following: M CSI-RS ports corresponding to the first CSI-RS resource, the number of ports of the first CSI-RS resource, a subcarrier used to carry the first CSI-RS resource, and an OFDM symbol used to carry the first CSI-RS resource.
  • part of the configuration information of the second CSI-RS resource may include at least one item: L CSI-RS ports corresponding to the second CSI-RS resource, the number of ports of the second CSI-RS resource, the subcarrier used to carry the second CSI-RS resource, and the OFDM symbol used to carry the second CSI-RS resource.
  • the processing module 1702 when used to determine the second CSI-RS resource based on the configuration information of the first CSI-RS resource and part of the configuration information of the second CSI-RS resource, it is specifically used to: determine the second CSI-RS resource based on the common configuration of the first CSI-RS and the second CSI-RS resource, and part of the configuration information of the second CSI-RS resource.
  • the communication module 1701 is further used to receive first information, where the first information indicates that the second CSI-RS resource is a resource belonging to L CSI-RS ports in the first CSI-RS resource.
  • the communication device can be specifically used to implement the method executed by the network device in the embodiment of FIG. 2 , and the device can be the network device itself, or a chip or circuit in the network device or a part of the chip used to execute the function of the related method.
  • the communication module 1701 is used to send a first signaling, and the first signaling indicates the configuration information of the first CSI-RS resource; the communication module 1701 is also used to send a second signaling, and the second signaling indicates a part of the configuration information of the second CSI-RS resource; wherein the configuration information of the first CSI-RS resource and the part of the configuration information of the second CSI-RS resource are used to determine the second CSI-RS resource.
  • the configuration information of the first CSI-RS resource includes a dedicated configuration of the first CSI-RS resource and a common configuration of the first CSI-RS and the second CSI-RS resource; and the second configuration information includes dedicated configuration information of the second CSI-RS resource.
  • the common configuration of the first CSI-RS and the second CSI-RS resources may include at least one of the following: the CDM group type corresponding to the CSI-RS resource, the resource block carrying the CSI-RS resource, the frequency domain density of the CSI-RS resource, the first period of the CSI-RS resource, the time slot carrying the CSI-RS resource in the first period, the scrambling code corresponding to the CSI-RS resource, the power control offset, and the power control offset relative to the synchronization signal.
  • the dedicated configuration of the first CSI-RS resource may include at least one of the following: M CSI-RS ports corresponding to the first CSI-RS resource, the number of ports of the first CSI-RS resource, a subcarrier used to carry the first CSI-RS resource, and an OFDM symbol used to carry the first CSI-RS resource.
  • part of the configuration information of the second CSI-RS resource may include at least one item: L CSI-RS ports corresponding to the second CSI-RS resource, the number of ports of the second CSI-RS resource, the subcarrier used to carry the second CSI-RS resource, and the OFDM symbol used to carry the second CSI-RS resource.
  • the communication module 1701 is further used to send first information, where the first information indicates that the second CSI-RS resource is a resource belonging to L CSI-RS ports in the first CSI-RS resource.
  • the embodiment of the present application provides another communication device, the structure of which can be as shown in FIG18, and the image device can be a communication device or a chip in a communication device, wherein the communication device can be a terminal in the above embodiment or a network device in the above embodiment.
  • the device includes a processor 1801 and a communication interface 1802, and can also include a memory 1803.
  • the processing module 1702 can be the processor 1801.
  • the communication module 1701 can be the communication interface 1802.
  • the processor 1801 may be a CPU, or a digital processing unit, etc.
  • the communication interface 1802 may be a transceiver, or an interface circuit such as a transceiver circuit, or a transceiver chip, etc.
  • the device further includes: a memory 1803 for storing programs executed by the processor 1801.
  • the memory 1803 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), such as a random-access memory (RAM).
  • the memory 1803 is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.
  • the processor 1801 is used to execute the program code stored in the memory 1803, specifically to execute the actions of the processing module 1702, which will not be described in detail in this application.
  • the communication interface 1802 is specifically used to execute the actions of the communication module 1701, which will not be described in detail in this application.
  • connection medium between the communication interface 1802, the processor 1801 and the memory 1803 is not limited in the embodiment of the present application.
  • the memory 1803, the processor 1801 and the communication interface 1802 are connected via a bus 1804.
  • the bus is represented by a bold line in FIG. 18 .
  • the connection mode between other components is only for schematic illustration and is not intended to be limiting.
  • the bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one bold line is used in FIG. 18 , but it does not mean that there is only one bus or one type of bus.
  • An embodiment of the present application also provides a computer-readable storage medium for storing computer software instructions required to be executed by the above-mentioned processor, which includes a program required to be executed by the above-mentioned processor.
  • the embodiment of the present application also provides a communication system, including a communication device for implementing the terminal function in the embodiment of FIG. 2 and a communication device for implementing the network device function in the embodiment of FIG. 2 .
  • An embodiment of the present application also provides a communication system, including a communication device for implementing the terminal function in the embodiment of Figure 16 and a communication device for implementing the network device function in the embodiment of Figure 16.
  • An embodiment of the present application also provides a communication method, including: a network device sends configuration information of a first CSI-RS resource to a terminal device, wherein the first CSI-RS resource includes M ports; the network device may also send first information to the terminal device, wherein the first information indicates L ports among the M ports; and then the terminal device determines a second CSI-RS resource from the first CSI-RS resource according to the first information.
  • the specific functions or operations performed by the network device or terminal device can refer to the aforementioned method embodiments and will not be repeated here.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or it can be an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiments of the present application.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.
  • Computer-readable media include computer storage media and communication media, wherein the communication media include any media that facilitates the transmission of a computer program from one place to another.
  • the storage medium can be any available medium that a computer can access.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande concerne un procédé et un appareil de communication, qui sont utilisés pour réduire des surdébits de signalisation pour une configuration de ressources de signal de référence d'informations d'état de canal (CSI-RS). Le procédé consiste à : recevoir des informations de configuration d'une première ressource CSI-RS, la première ressource CSI-RS comprenant M ports ; recevoir des premières informations, les premières informations indiquant L ports parmi les M ports ; et, selon les premières informations, déterminer une seconde ressource CSI-RS à partir de la première ressource CSI-RS.
PCT/CN2024/083868 2023-04-07 2024-03-26 Procédé et appareil de communication Ceased WO2024208033A1 (fr)

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CN202310411056.5 2023-04-07
CN202310411056.5A CN118784182A (zh) 2023-04-07 2023-04-07 一种通信方法及装置

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022047759A1 (fr) * 2020-09-05 2022-03-10 Qualcomm Incorporated Partage de csi-rs flexible pour rétroaction de csi de sélection de port
CN115085876A (zh) * 2021-03-10 2022-09-20 华为技术有限公司 确定信道质量指示的方法及装置
CN115484636A (zh) * 2021-05-31 2022-12-16 华为技术有限公司 信道状态信息的测量方法和装置
CN115765942A (zh) * 2021-09-06 2023-03-07 华为技术有限公司 用于传输参考信号的方法和装置
CN117041985A (zh) * 2022-04-29 2023-11-10 华为技术有限公司 一种通信方法及装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022047759A1 (fr) * 2020-09-05 2022-03-10 Qualcomm Incorporated Partage de csi-rs flexible pour rétroaction de csi de sélection de port
CN115085876A (zh) * 2021-03-10 2022-09-20 华为技术有限公司 确定信道质量指示的方法及装置
CN115484636A (zh) * 2021-05-31 2022-12-16 华为技术有限公司 信道状态信息的测量方法和装置
CN115765942A (zh) * 2021-09-06 2023-03-07 华为技术有限公司 用于传输参考信号的方法和装置
CN117041985A (zh) * 2022-04-29 2023-11-10 华为技术有限公司 一种通信方法及装置

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