Communication method and device

Abstract

The invention provides a communication method and device, relates to the field of communication, and can reasonably configure antenna ports for a plurality of terminals respectively. The method comprises: a first terminal device receiving first indication information and second indication information, the first indication information indicating a first antenna port indication table, the first antenna port indication table comprising X groups of first antenna port information, X being a positive integer, the second indication information indicating the first group of antenna port information, the first antenna port indicator includes a first set of antenna port information. Wherein a first port group indicated by the first antenna port information comprises at least one first port and at least one second port, the number of the at least one first port is greater than that of the at least one second port, the at least one first port is located in the first port set, and the at least one second port is located in the second port set. The at least one second port is located in the second port set, and the minimum port index in the first port set is greater than the maximum port index in the second port set.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communications, and in particular, to a communication method and device. Background Art

[0002] In the multiple input multiple output (MIMO) technology of the 3rd generation partnership project (3GPP) release 18 (R18), the number of antenna ports for reference signals is enhanced. For example, when the reference signal (RS) sequence is mapped on one orthogonal frequency division multiplexing (OFDM) symbol, the maximum number of antenna ports is 12; when the RS sequence is mapped on two OFDM symbols, the maximum number of antenna ports is 24.

[0003] In multi-user (MU) MIMO technology, when multiple terminal devices support different protocol versions, the antenna ports supported by each terminal device may be inclusive. In this scenario, how to reasonably configure antenna ports for multiple terminals is an urgent problem to be solved. Summary of the invention

[0004] The present application provides a communication method and device, which can reasonably configure antenna ports for multiple terminals respectively.

[0005] In a first aspect, a communication method is provided, which can be executed by a first terminal device, or by a component of the first terminal device, such as a processor, a chip, or a chip system of the first terminal device, or by a logic module or software that can realize all or part of the functions of the first terminal device. The method includes: receiving first indication information, the first indication information indicates a first antenna port indication table, the first antenna port indication table includes X groups of first antenna port information, X is a positive integer, the first port group indicated by the first antenna port information includes at least one first port and at least one second port, the number of ports of at least one first port is greater than the number of ports of at least one second port, at least one first port is located in a first port set, at least one second port is located in a second port set, and the port index of any antenna port in the first port set is greater than the port index of any antenna port in the second port set, and the maximum port index in the second port set is less than half of the number of antenna ports supported under the reference signal configuration corresponding to the first antenna port indication table; receiving second indication information, the second indication information indicates the first group of antenna port information, and the first antenna port indication table includes the first group of antenna port information.

[0006] Based on this solution, the first terminal device can determine the first group of antenna port information from the first antenna port indication table including the first antenna port information of the X groups according to the second indication information. Among them, since the index of any port in the first port set is greater than the index of any port in the second port set, the maximum port index in the second port set is less than half of the number of antenna ports supported under the reference signal configuration corresponding to the first antenna port indication table, therefore, the ports in the second port set can be understood as ports in the traditional protocol or traditional ports, and the first port set can be understood as a port set enhanced on the basis of the traditional port. In addition, the first port group includes at least one first port and at least one second port, and the number of ports of at least one first port is greater than the number of ports of at least one second port, indicating that in the port group indicated by the first antenna port information, the number of enhanced ports is greater than the number of traditional ports. At this time, compared with the solution in which the network device indicates the reference signal port for the first terminal device from the existing protocol, the number of enhanced ports in the reference signal port configured by the network device for the first terminal device is larger, and the number of traditional ports is smaller. At this time, the number of remaining traditional ports is larger, so the number of ports that can be allocated to traditional terminal devices (terminal devices that only support traditional ports) is larger, thereby increasing the actual throughput of traditional terminal devices. In this way, the rationality of antenna port configuration is achieved when multiple terminal devices support different protocol versions.

[0007] In one possible design, the first indication information includes a reference signal configuration, which is associated with a first antenna port indication table. The reference signal configuration includes a first configuration type, a first length, and first enhancement information, wherein the first configuration type is the configuration type of the reference signal corresponding to the first antenna port indication table, the first length is the maximum length of the reference signal corresponding to the first antenna port indication table in the time domain, and the first enhancement information indicates that the first configuration type is an enhanced type.

[0008] In a possible design, the first enhancement information indicates that the first configuration type is an enhanced type, which can also be understood as: an enhanced reference signal (such as a demodulation reference signal DMRS) is turned on.

[0009] In one possible design, the first length of the reference signal configuration indication is 2, and the first length is the maximum length of the reference signal corresponding to the first antenna port indication table in the time domain.

[0010] Exemplarily, the reference signal configuration is associated with the first antenna port indicator table, which can be understood as: the reference signal configuration is used to determine the first antenna port indicator table. In PDSCH transmission, the terminal device can determine the first antenna port indicator table according to the reference signal configuration; in PUSCH transmission, the terminal device can determine the first antenna port indicator table according to the reference signal configuration and the first transmission layer number.

[0011] In one possible design, the first antenna port indication table also includes Y groups of second antenna port information, and the multiple orthogonal antenna ports in the second port group indicated by the second antenna port information belong to multiple code division multiplexing CDM groups, and Y is a positive integer; the antenna ports in the third port set except the multiple antenna ports in the second port group are not used for physical downlink shared channel PDSCH transmission; wherein the third port set includes the orthogonal antenna ports supported under the reference signal configuration, or the third port set includes the orthogonal antenna ports in the multiple CDM groups to which the multiple orthogonal antenna ports in the second port group belong, or the third port set includes the antenna ports in the multiple CDM groups to which the multiple orthogonal antenna ports in the second port group belong, which have the same time division orthogonal mask TD-OCC sequence as the multiple orthogonal antenna ports in the second port group.

[0012] In one possible design, when the received second indication information corresponds to the second port group, that is, the port group indicated by the first group of antenna port information is the second port group, the first terminal device can assume that among all orthogonal antenna ports supported under the reference signal configuration, all remaining orthogonal antenna port groups except the port group indicated by the first group of antenna port information are not associated with the physical downlink shared channel PDSCH transmission of terminal devices other than the first terminal device.

[0013] In one possible design, the first configuration type is type 1, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, and the second port group includes any one of the following multiple items: {0-2}, {0-3}, {0, 2}. The first configuration type is type 2, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, and the second port group includes any one of the following multiple items: {0-2}, {0-3}, {3-5}, {0, 2}.

[0014] In one possible design, when the received second indication information corresponds to the second port group, that is, the port group indicated by the first group of antenna port information is the second port group, the first terminal device can assume that, among the antenna ports belonging to the same CDM group as the multiple orthogonal antenna ports in the second port group, all remaining orthogonal antenna ports except the multiple orthogonal antenna ports in the port group indicated by the first group of antenna port information are not associated with the PDSCH transmission of terminal devices other than the first terminal device.

[0015] In one possible design, the first configuration type is type1, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, and the second port group includes any one of the following multiple items: {0-2}, {0-3}, {0, 2}, {0, 2, 4, 6}. The first configuration type is type type2, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, and the second port group includes any one of the following multiple items: {0-2}, {0-3}, {3-5}, {0, 2}.

[0016] In one possible design, when the received second indication information corresponds to the second port group, that is, the port group indicated by the first group of antenna port information is the second port group, the first terminal device can assume that the multiple orthogonal antenna ports in the port group indicated by the first group of antenna port information belong to the same CDM group, and among the orthogonal antenna ports with the same TD-OCC sequence corresponding to the multiple orthogonal antenna ports in the port group indicated by the first group of antenna port information, all remaining orthogonal antenna ports except the multiple orthogonal antenna ports in the port group indicated by the first group of antenna port information are not associated with the PDSCH transmission of terminal devices other than the first terminal device.

[0017] In one possible design, the first configuration type is type1, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, and the second port group includes any one of the following multiple items: {0-2}, {0-3}, {0, 2}, {0, 2, 4, 6}. The first configuration type is type type2, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, and the second port group includes any one of the following multiple items: {0-2}, {0-3}, {3-5}, {0, 2}.

[0018] Based on the above seven possible designs, since the antenna ports in the third port set except the multiple orthogonal antenna ports in the second port group are not used for data transmission (that is, the antenna ports in the third port set except the multiple orthogonal antenna ports in the second port group are not used for MU multiplexing with other devices except the first terminal device), that is to say, the first terminal device does not need to execute the step of determining whether the antenna ports in the third port set except the multiple orthogonal antenna ports in the second port group are not occupied by other devices. Compared with the case where the first terminal device receives an indication that the orthogonal antenna ports in the second port group belong to multiple CDM groups, the first terminal device needs to determine whether the antenna ports in the third port set except the multiple orthogonal antenna ports in the second port group are not occupied by other devices. This solution can reduce the complexity of channel estimation and improve the channel estimation capability.

[0019] In one possible design, the first antenna port indication table also includes Z groups of third antenna port information, and the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, and Z is a positive integer; the antenna ports in the fourth port set except the multiple orthogonal antenna ports in the third port group are not used for PDSCH transmission; wherein the fourth port set includes orthogonal antenna ports supported under the reference signal configuration, or the fourth port set includes orthogonal antenna ports in multiple CDM groups to which the multiple orthogonal antenna ports in the third port group belong.

[0020] In one possible design, when the received second indication information corresponds to the third port group, that is, the port group indicated by the first group of antenna port information is the third port group, the first terminal device can assume that among all orthogonal antenna ports supported under the reference signal configuration, all remaining orthogonal antenna port groups except the port group indicated by the first group of antenna port information are not associated with the physical downlink shared channel PDSCH transmission of terminal devices other than the first terminal device.

[0021] In one possible design, when the first configuration type is type 1, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, the third port group includes any one of the following multiple items: {0-2}, {0-3}, {0, 2}. When the first configuration type is type 2, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, the second port group includes any one of the following multiple items: {0, 1, 6}, {2, 3, 8}, {4, 5, 10}, {0, 1, 6, 7}, {2, 3, 8, 9}, {4, 5, 10, 11}.

[0022] In one possible design, when the received second indication information corresponds to the third port group, that is, the port group indicated by the first group of antenna port information is the third port group, the first terminal device can assume that, among the antenna ports belonging to the same CDM group as the multiple orthogonal antenna ports in the third port group, all remaining orthogonal antenna ports except the multiple orthogonal antenna ports in the port group indicated by the first group of antenna port information are not associated with the PDSCH transmission of terminal devices other than the first terminal device.

[0023] In one possible design, the first configuration type is type 1, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, and the third port group includes any one of the following multiple items: {0, 4}, {2, 6}, {0, 1, 4}, {2, 3, 6}, {0, 1, 4, 5}, {2, 3, 6, 7}. The first configuration type is type 2, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, and the second port group includes any one of the following multiple items: {0, 1, 6}, {2, 3, 8}, {4, 5, 10}, {0, 1, 6, 7}, {2, 3, 8, 9}, {4, 5, 10, 11}.

[0024] Based on this possible design, since the antenna ports in the fourth port set except the multiple orthogonal antenna ports in the third port group are not used for data transmission (that is, the orthogonal antenna ports in the fourth port set except the multiple orthogonal antenna ports in the third port group are not used for MU multiplexing with other devices except the first terminal device), that is to say, the first terminal device does not need to execute the step of determining whether the orthogonal antenna ports in the fourth port set except the multiple orthogonal antenna ports in the third port group are not occupied by other devices. Compared with the case where the first terminal device receives an indication that the orthogonal antenna ports in the third port group correspond to multiple groups of TD-OCC sequences, the first terminal device needs to determine whether the orthogonal antenna ports in the fourth port set except the multiple orthogonal antenna ports in the third port group are not occupied by other devices. This solution can reduce the complexity of channel estimation and improve channel estimation capability.

[0025] In one possible design, multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, including: multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, and the TD-OCC sequences of the multiple orthogonal antenna ports in the third port group are mutually orthogonal.

[0026] In one possible design, the first configuration type is type 1, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, and the third port group includes any one of the following items: {0, 4}, {2, 6}, {0, 2, 4, 6}.

[0027] In one possible design, the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, including: the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, the TD-OCC sequences of the multiple orthogonal antenna ports in the third port group are mutually orthogonal, and the frequency division mask FD-OCC sequences of the multiple orthogonal antenna ports in the third port group are the same. Alternatively, the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, including: the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, the TD-OCC sequences of the multiple orthogonal antenna ports in the third port group are mutually orthogonal, and the multiple orthogonal antenna ports in the third port group belong to the same CDM group.

[0028] In one possible design, the first configuration type is type 1, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, and the third port group includes any one of the following items: {0, 4}, {2, 6}.

[0029] Based on this possible design, since the multiple orthogonal antenna ports in the third port group belong to the same CDM group, the first terminal device can send or receive DMRS on the port of the same CDM group, which can reduce the complexity of channel estimation and improve the channel estimation capability compared to the port group in which the multiple orthogonal antenna ports belong to multiple CDM groups. In addition, the orthogonal antenna ports in other CDM groups except the CDM group to which the multiple orthogonal antenna ports in the third port group belong can be allocated to other terminal devices except the first terminal device for sending or receiving DMRS.

[0030] In one possible design, the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, including: the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, the TD-OCC sequences of the multiple orthogonal antenna ports in the third port group are mutually orthogonal, and the multiple orthogonal antenna ports in the third port group belong to multiple groups of CDM groups. Alternatively, the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, including: the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, the TD-OCC sequences of the multiple orthogonal antenna ports in the third port group are mutually orthogonal, and the frequency division mask FD-OCC sequences of the multiple orthogonal antenna ports in the third port group are different.

[0031] In one possible design, the first configuration type is type 1, the first length is 2, and when the first enhancement information indicates that the enhanced reference signal type is turned on, the third port group includes any one of the following items: {0, 2, 4, 6}. In one possible design, the communication method also includes: receiving third indication information, the third indication information indicates a first transmission layer number, the first transmission layer number is the transmission layer number of data (PUSCH), and the number of antenna ports in the first port group is equal to the first transmission layer number.

[0032] Exemplarily, the third indication information and the second indication information may be located in the same downlink control information DCI signaling.

[0033] In one possible design, the communication method also includes: communicating according to a port group indicated by the first group of antenna port information.

[0034] In a second aspect, a communication method is provided, which can be executed by a network device, or by a component of the network device, such as a processor, a chip, or a chip system of the network device, or by a logic module or software that can realize all or part of the network device function. The method includes: sending first indication information to a first terminal device, the first indication information indicating a first antenna port indication table, the first antenna port indication table including X groups of first antenna port information, X being a positive integer, the first port group indicated by the first antenna port information including at least one first port and at least one second port, the number of ports of at least one first port is greater than the number of ports of at least one second port, at least one first port is located in a first port set, at least one second port is located in a second port set, and the port index of any antenna port in the first port set is greater than the port index of any antenna port in the second port set, and the maximum port index in the second port set is less than half of the number of antenna ports supported under the reference signal configuration corresponding to the first antenna port indication table; sending second indication information to the first terminal device, the second indication information indicating a first group of antenna port information, the first antenna port indication table including the first group of antenna port information.

[0035] Based on this solution, the network device configures an antenna port for the first terminal device from the first antenna port indication table including the first antenna port information of the X group (i.e., sends the second indication information to the first terminal device). Since the index of any port in the first port set is greater than the index of any port in the second port set, the maximum port index in the second port set is less than half of the number of antenna ports supported under the reference signal configuration corresponding to the first antenna port indication table. Therefore, the ports in the second port set are ports in the traditional protocol or traditional ports, and the first port set is enhanced on the basis of the traditional ports. In addition, the first port group includes at least one first port and at least one second port, and the number of ports of at least one first port is greater than the number of ports of at least one second port. That is, in the port group indicated by the first antenna port information, the number of enhanced ports is greater than the number of traditional ports. At this time, compared with the solution in which the network device indicates the reference signal port for the first terminal device from the existing protocol, the number of enhanced ports in the reference signal port configured by the network device for the first terminal device is larger, and the number of traditional ports is smaller. At this time, the number of remaining traditional ports is larger, so the number of ports that can be allocated to traditional terminal devices (terminal devices that only support traditional ports) is larger, thereby increasing the actual throughput of traditional terminal devices. This ensures that antenna port configuration is reasonable when multiple terminal devices support different protocol versions.

[0036] In one possible design, the first antenna port indication table also includes K groups of fourth antenna port information, the fourth antenna port information is used to determine a first layer number combination with at least one group of first antenna port information, the first layer number combination is used to configure antenna ports for multiple terminal devices, the multiple terminal devices include the first terminal device, K is a positive integer; the antenna ports in at least one first port group indicated by at least one group of first antenna port information do not overlap with the ports in the fourth port group indicated by the fourth antenna port information, and the ports in at least one first port group do not overlap. In one possible design, the first layer number combination includes multiple groups of port numbers, and the multiple groups of port numbers include the number of ports in at least one first port group and the number of ports in the fourth port group.

[0037] In one possible design, in PUSCH transmission, the fourth port group supports all layer combinations, that is, the fourth port group can participate in multi-user MU transmission together with port groups other than the fourth port group (such as the first port group, the second port group, and the third port group).

[0038] In a possible design, a fourth port group may participate in multi-user MU transmission together with four first port groups.

[0039] In one possible design, when the first configuration type is type1, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, the four first port groups can be {1, 8, 9}, {5, 12, 13}, {3, 10, 11}, {7, 14, 15}, respectively, and the fourth port group can be {0, 2, 4, 6}. At this time, the first layer number combination includes 5 groups of port numbers, and the 5 groups of port numbers are {3, 3, 3, 3, 4}. And the sum of the 5 groups of port numbers is 16, that is, the first layer number combination is a 16-layer paired layer number combination.

[0040] In a possible design, when the first configuration type is type1, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, the four first port groups can be {1, 8, 9}, {5, 12, 13}, {3, 10, 11}, {7, 14, 15}, respectively, and the fourth port group can be {2, 4, 6}. At this time, the first layer number combination includes 5 groups of port numbers, and the 5 groups of port numbers are {3, 3, 3, 3, 3}. And the sum of the 5 groups of port numbers is 15, that is, the first layer number combination is a 15-layer paired layer number combination.

[0041] In a possible design, two fourth port groups may participate in multi-user MU transmission together with four first port groups.

[0042] In a possible design, when the first configuration type is type1, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, the four first port groups can be {1, 8, 9}, {5, 12, 13}, {3, 10, 11}, {7, 14, 15}, respectively, and the two fourth port groups can be {0, 2}, {4, 6}, respectively. At this time, the first layer number combination includes 6 groups of port numbers, and the 6 groups of port numbers are {3, 3, 3, 3, 2, 2}. And the sum of the 6 groups of port numbers is 16, that is, the first layer number combination is a 16-layer paired layer number combination.

[0043] In a possible design, three fourth port groups may participate in multi-user MU transmission together with two first port groups.

[0044] In a possible design, when the first configuration type is type1, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, the three first port groups can be {1, 8, 9}, {5, 12, 13}, respectively, and the three fourth port groups can be {0, 4}, {2, 3, 10, 11}, {6, 7, 14, 15}, respectively. At this time, the first layer number combination includes 5 groups of port numbers, and the 5 groups of port numbers are {3, 3, 2, 4, 4}. And the sum of the 5 groups of port numbers is 16, that is, the first layer number combination is a 16-layer paired layer number combination.

[0045] In a possible design, two fourth port groups may participate in multi-user MU transmission together with six first port groups.

[0046] In a possible design, when the first configuration type is type2, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, the six first port groups can be {1, 12, 13}, {7, 18, 19}, {3, 14, 15}, {9, 20, 21}, {5, 16, 17}, {11, 22, 23}, respectively, and the two fourth port groups can be {0, 2, 6}, {4, 8, 10}, respectively. At this time, the first layer number combination includes 6 groups of port numbers, and the 6 groups of port numbers are {3, 3, 3, 3, 3, 3, 3, 3}. And the sum of the 8 groups of port numbers is 24, that is, the first layer number combination is a 24-layer paired layer number combination.

[0047] In one possible design, five fourth port groups may participate in multi-user MU transmission together with two first port groups.

[0048] In a possible design, when the first configuration type is type2, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, the two first port groups can be {1, 12, 13}, {7, 18, 19}, respectively. At this time, the five fourth port groups can be {2, 3, 14, 15}, {8, 9, 20, 21}, {4, 5, 16, 17}, {10, 11, 22, 23}, {0, 6}, respectively. At this time, the first layer number combination includes 7 groups of port numbers, and the 7 groups of port numbers are {3, 3, 4, 4, 4, 4, 2}. And the sum of the 7 groups of port numbers is 24, that is, the first layer number combination is a 24-layer paired layer number combination.

[0049] In one possible design, the first layer number combination may include at least one fourth port group.

[0050] In one possible design, the first layer number combination includes six fourth port groups.

[0051] In a possible design, the first configuration type is type2, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on. At this time, the six fourth port groups can be {0, 1, 12, 13}, {6, 7, 18, 19}, {2, 3, 14, 15}, {8, 9, 20, 21}, {4, 5, 16, 17}, {10, 11, 22, 23}. At this time, the first layer number combination includes 6 groups of port numbers, and the 6 groups of port numbers are {4, 4, 4, 4, 4, 4}. And the sum of the 6 groups of port numbers is 24, that is, the first layer number combination is a 24-layer paired layer number combination.

[0052] In one possible design, the number of data-free reference signal code division multiplexing CDM groups indicated by at least one set of first antenna port information is the same as the number of data-free CDM groups indicated by the fourth antenna port information.

[0053] In one possible design, at least one antenna port in the first port group and an antenna port in the fourth port group are located in the same code CDM group.

[0054] Based on this possible design, the antenna ports configured by the network device for the terminal devices participating in MU transmission belong to the same CDM group, so that the antenna ports in other CDM groups except this CDM group can be configured to other devices except the terminal devices participating in MU transmission.

[0055] In one possible design, the sum of the number of antenna ports in the first layer number combination is less than or equal to the maximum number of transmission layers supported under the parameter configuration corresponding to the first antenna port indication table.

[0056] In a possible design, the fourth port group is applicable to multiple layer number combinations, wherein the sum of the numbers of antenna ports in the multiple layer number combinations is the same.

[0057] In combination with the first aspect and the second aspect, in a possible design, the number of ports in the first port set is equal to the number of ports in the second port set.

[0058] In combination with the first aspect and the second aspect, in a possible design, the port index of the second port is greater than 0.

[0059] In combination with the first aspect and the second aspect, in a possible design, at least one first port and at least one second port belong to the same CDM group, that is, the antenna ports in the port group indicated by the first antenna port information all belong to the same CDM group.

[0060] In combination with the first aspect and the second aspect, in a possible design, multiple antenna ports in the first port group belong to the same CDM group.

[0061] In combination with the first aspect and the second aspect, in one possible design, the difference between the number of ports of at least one first port and the number of ports of at least one second port is a first numerical value, the first numerical value is in a first numerical value set, the minimum numerical value in the first numerical value set is greater than or equal to 1, the maximum numerical value in the first numerical value set is less than one half of the number of antenna ports included in the first CDM group, the first CDM group is any one of the CDM groups under the reference signal configuration corresponding to the first antenna port indication table, and each numerical value in the first numerical value set is a positive integer.

[0062] In combination with the first aspect and the second aspect, in one possible design, the first configuration type is type1, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, and the first port group includes any one of the following items: {5, 8, 9, 12, 13}, {4, 5, 8, 9, 12, 13}, {1, 4, 5, 8, 9, 12, 13}, {1, 5, 8, 9, 12, 13}.

[0063] Based on the above four possible designs, since the antenna ports in the port group indicated by the first antenna port information belong to the same CDM group, that is, the first terminal device can send or receive reference signals (such as DMRS) on the antenna ports in the same CDM group, there is no need to determine whether the remaining antenna ports (that is, the antenna ports in the same CDM except the antenna ports in the port group indicated by the first antenna port information) are occupied by other devices, thereby reducing the complexity of channel estimation and improving the channel estimation capability.

[0064] In combination with the first aspect and the second aspect, in one possible design, at least one first port corresponds to the same TD-OCC sequence as at least one second port. In other words, the TD-OCC sequence of each antenna port in at least one first port and at least one second port is the same.

[0065] In combination with the first aspect and the second aspect, in a possible design, multiple antenna ports in the first port group correspond to the same TD-OCC sequence.

[0066] In combination with the first aspect and the second aspect, in one possible design, the difference between the number of ports of at least one first port and the number of ports of at least one second port is a second value, the second value is in a second value set, the minimum value in the second value set is greater than or equal to 1, the maximum value in the second value set is less than half of the number of antenna ports corresponding to the first TD-OCC sequence, the first TD-OCC sequence is the TD-OCC sequence corresponding to any antenna port in the antenna port under the reference signal configuration corresponding to the first antenna port indication table, and each value in the second value set is a positive integer.

[0067] In combination with the first aspect and the second aspect, in one possible design, when the first configuration type is type 1, the first length is 2, and the first enhancement information indicates that enhanced DMRS is turned on, the first port group includes any one of the following items: {2, 8, 9}, {6, 12, 13}, {1, 10, 11}, {4, 14, 15}.

[0068] In combination with the first aspect and the second aspect, in one possible design, when the first configuration type is type 2, the first length is 2, and the first enhancement information indicates that enhanced DMRS is turned on, the first port group includes any one of the following items: {2, 12, 13}, {8, 18, 19}, {1, 14, 15}, {7, 20, 21}, {1, 16, 17}, {7, 22, 23}.

[0069] Based on the above five possible designs, since the antenna ports in the port group indicated by the first antenna port information correspond to the same TD-OCC sequence, that is, the first terminal device can send or receive DMRS on the antenna port with the same TD-OCC sequence, compared with the scheme in which the first terminal device sends or receives DMRS on the antenna port with different TD-OCC sequence, it can reduce the complexity of channel estimation and improve the channel estimation capability.

[0070] In combination with the first aspect and the second aspect, in a possible design, at least one first port and at least one second port correspond to the same TD-OCC sequence, and the at least one first port and the at least one second port belong to the same CDM group.

[0071] In combination with the first aspect and the second aspect, in a possible design, the multiple antenna ports in the first port group belong to the same CDM group, and the multiple antenna ports in the first port group correspond to the same TD-OCC sequence.

[0072] In combination with the first aspect and the second aspect, in one possible design, the difference between the number of ports of at least one first port and the number of ports of at least one second port is a third value, the third value is in a third value set, the minimum value in the third value set is greater than or equal to 1, and the maximum value in the third value set is less than half of the number of antenna ports corresponding to the first TD-OCC sequence in the first CDM group, the first CDM group is any one of the CDM groups under the reference signal configuration corresponding to the first antenna port indication table, the first TD-OCC sequence is the TD-OCC sequence corresponding to any port in the first CDM group, and each value in the third value set is a positive integer.

[0073] In combination with the first aspect and the second aspect, in one possible design, when the first configuration type is type 1, the first length is 2, and the first enhancement information indicates that enhanced DMRS is turned on, the first port group includes any one of the following items: {1, 8, 9}, {5, 12, 13}, {3, 10, 11}, {7, 14, 15}.

[0074] In combination with the first aspect and the second aspect, in one possible design, when the first configuration type is type2, the first length is 2, and the first enhancement information indicates that enhanced DMRS is turned on, the first port group includes any one of the following items: {1, 12, 13}, {7, 18, 19}, {3, 14, 15}, {9, 20, 21}, {5, 16, 17}, {11, 22, 23}.

[0075] Based on the above five possible designs, since the antenna ports in the port group indicated by the first antenna port information correspond to the same group of TD-OCC sequences, and multiple antenna ports belong to the same CDM group; that is, the first terminal device can send or receive DMRS on the antenna port with the same TD-OCC sequence in the same CDM group. Compared with the scheme in which the first terminal device sends or receives DMRS on antenna ports with different TD-OCC sequences and / or belonging to different CDM groups, it can reduce the complexity of channel estimation and improve the channel estimation capability.

[0076] In combination with the first aspect and the second aspect, in a possible design, the number of ports of the multiple antenna ports in the port group indicated by the first antenna port information is greater than or equal to 3.

[0077] In combination with the first aspect and the second aspect, in one possible design, the four-long frequency domain mask sequences corresponding to each port of at least one first port and at least one second port are orthogonal, the four-long frequency domain mask sequences include the frequency domain masks corresponding to 4 consecutive subcarriers in a CDM group, and the adjacent frequency domain mask symbols in the four-long frequency domain mask sequences corresponding to each second port of at least one second port are orthogonal.

[0078] In combination with the first aspect and the second aspect, in one possible design, the frequency domain mask sequence of at least one second port includes {+1, +1, +1, +1} and / or {+1, -1, +1, -1}.

[0079] In combination with the first aspect and the second aspect, in one possible design, the frequency domain mask sequence of at least one first port includes {+1, +1, -1, -1} and / or {+1, -1, -1, +1}.

[0080] In combination with the first aspect and the second aspect, in one possible design, the first antenna port information is also used to indicate one or more of the following: an index of the first antenna port information, a number of reference signal CDM groups without data, and a number of preamble symbols.

[0081] In a third aspect, a communication device is provided for implementing various methods. The communication device may be the first terminal device in the first aspect, or a device included in the first terminal device, such as a chip or a chip system; or, the communication device may be the network device in the second aspect, or a device included in the network device, such as a chip or a chip system. The communication device includes a module, unit, or means corresponding to the implementation method, and the module, unit, or means may be implemented by hardware, software, or by hardware executing the corresponding software implementation. The hardware or software includes one or more modules or units corresponding to the functions.

[0082] In some possible designs, the communication device may include a processing module and a transceiver module. The processing module may be used to implement the processing function in any of the above aspects and any possible implementations thereof. The transceiver module may include a receiving module and a sending module, respectively used to implement the receiving function and the sending function in any of the above aspects and any possible implementations thereof.

[0083] In some possible designs, the transceiver module may be composed of a transceiver circuit, a transceiver, a transceiver or a communication interface.

[0084] In a fourth aspect, a communication device is provided, comprising: a processor and a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the communication device executes the method described in any aspect. The communication device can be the first terminal device in the first aspect, or a device included in the first terminal device, such as a chip or a chip system; or the communication device can be the network device in the second aspect, or a device included in the network device, such as a chip or a chip system.

[0085] In a fifth aspect, a communication device is provided, comprising: a processor and a communication interface; the communication interface is used to communicate with a module outside the communication device; the processor is used to execute a computer program or instruction so that the communication device executes the method described in any aspect. The communication device can be the first terminal device in the first aspect, or a device included in the first terminal device, such as a chip or a chip system; or the communication device can be the network device in the second aspect, or a device included in the network device, such as a chip or a chip system.

[0086] In a sixth aspect, a communication device is provided, comprising: at least one processor; the processor is used to execute a computer program or instruction stored in a memory, so that the communication device performs the method described in any aspect. The memory may be coupled to the processor, or may be independent of the processor. The communication device may be the first terminal device in the first aspect, or a device included in the first terminal device, such as a chip or a chip system; or the communication device may be the network device in the second aspect, or a device included in the network device, such as a chip or a chip system.

[0087] In some possible designs, the communication device includes a memory for storing necessary program instructions and data.

[0088] In some possible designs, when the device is a chip system, it can be composed of a chip or include a chip and other discrete devices.

[0089] It can be understood that when the communication device provided in any one of the third to sixth aspects is a chip, the sending action / function of the communication device can be understood as output information, and the receiving action / function of the communication device can be understood as input information.

[0090] In a seventh aspect, a computer-readable storage medium is provided, in which a computer program or instruction is stored, and when the computer-readable storage medium is run on a communication device, the communication device can execute the method described in any one of the aspects.

[0091] In an eighth aspect, a computer program product comprising instructions is provided, which, when executed on a communication device, enables the communication device to execute the method described in any one of the aspects.

[0092] Among them, the technical effects brought about by any design method in the third aspect to the eighth aspect can refer to the technical effects brought about by different design methods in the first aspect or the second aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0093] Figure 1 A schematic diagram of a time-frequency resource provided for this application;

[0094] Figure 2 A schematic diagram of another time-frequency resource provided for this application;

[0095] Figure 3 A schematic diagram of the structure of a communication system provided for this application;

[0096] Figure 4 A schematic diagram of the structure of a communication system provided for this application;

[0097] Figure 5 A flow chart of a communication method provided by the present application;

[0098] Figure 6 A flowchart of another communication method provided by the present application;

[0099] Figure 7 A distribution diagram of antenna ports provided in this application;

[0100] Figure 8 A schematic diagram of the structure of a communication device provided by the present application;

[0101] Fig. 9 A schematic diagram of the structure of another communication device provided by the present application;

[0102] Fig.10 A schematic diagram of the structure of another communication device provided in the present application. DETAILED DESCRIPTION

[0103] In the description of this application, unless otherwise specified, " / " indicates that the objects associated with each other are in an "or" relationship, for example, A / B can represent A or B; "and / or" in this application is merely a description of the association relationship between associated objects, indicating that three relationships may exist, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.

[0104] In the description of this application, unless otherwise specified, "plurality" means two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0105] In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same items or similar items with substantially the same functions and effects. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit the difference.

[0106] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way for easy understanding.

[0107] It is understood that the "embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the various embodiments in the entire specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It is understood that in various embodiments of the present application, the size of the sequence number of each process does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0108] It can be understood that in the present application, "when" and "if" both mean that corresponding processing will be carried out under certain objective circumstances, and do not limit the time, nor do they require any judgment action when implementing, nor do they mean the existence of other limitations.

[0109] It can be understood that some optional features in the embodiments of the present application may be implemented independently in certain scenarios without relying on other features, such as the solution on which they are currently based, to solve corresponding technical problems and achieve corresponding effects, or may be combined with other features according to needs in certain scenarios. Accordingly, the devices provided in the embodiments of the present application may also realize these features or functions accordingly, which will not be elaborated here.

[0110] In this application, unless otherwise specified, the same or similar parts between the various embodiments can refer to each other. In the various embodiments in this application, and the various implementation methods / implementation methods / implementation methods in each embodiment, if there is no special explanation and logical conflict, the terms and / or descriptions between different embodiments and the various implementation methods / implementation methods / implementation methods in each embodiment are consistent and can be referenced to each other. The technical features in different embodiments and the various implementation methods / implementation methods / implementation methods in each embodiment can be combined to form new embodiments, implementation methods, implementation methods, or implementation methods according to their inherent logical relationships. The implementation methods of this application described below do not constitute a limitation on the scope of protection of this application.

[0111] In order to facilitate understanding of the technical solutions of the embodiments of the present application, a brief introduction to the related technologies of the present application is first given as follows.

[0112] 1. Resource block (RB):

[0113] In wireless resources, the smallest resource granularity in the time domain can be an orthogonal frequency division multiplexing (OFDM) symbol, which can be referred to as a symbol. In the frequency domain, the smallest resource granularity can be a subcarrier. An OFDM symbol and a subcarrier can form a resource element (RE), and a slot and 12 consecutive subcarriers in the frequency domain can form an RB. Among them, a slot can include multiple consecutive OFDM symbols in the time domain, for example, a slot includes 12 consecutive OFDM symbols or 14 consecutive OFDM symbols, etc.

[0114] like Figure 1 The figure shows a schematic diagram of a time-frequency resource. Figure 1 In the physical layer, when performing resource mapping, RE is used as the basic unit. RB is the basic scheduling unit in the frequency domain for data channel allocation. An RB includes 12 consecutive subcarriers in the frequency domain and 14 consecutive OFDM symbols in the time domain.

[0115] Understandably, Figure 1 This is only a schematic diagram of RB. In specific applications, RB may include Figure 1 More or fewer subcarriers may be shown without limitation.

[0116] In addition, the embodiment of the present application does not limit the frequency interval between adjacent subcarriers (i.e., subcarrier spacing). For example, in the embodiment of the present application, the subcarrier spacing may be 15KHz, 30KHz, 60KHz, 120KHz or 240KHz, etc. Different subcarrier spacings may correspond to different OFDM symbol lengths.

[0117] 2. Number of transmission layers (rank):

[0118] For spatial multiplexing multiple input multiple output (MIMO) technology, multiple parallel data can be transmitted simultaneously on the same time-frequency resources. Each data stream is called a spatial layer or spatial stream or transmission stream or stream. The number of transmission layers can also be called the number of transmission streams.

[0119] 3. Antenna port:

[0120] The antenna port may be understood as a transmitting antenna that is not identified by the receiving end, or a transmitting antenna that can be distinguished in space. The antenna port may be defined according to a reference signal (RS) associated with the antenna port.

[0121] An antenna port may be a physical antenna on a transmitting device, or a weighted combination of multiple physical antennas on the transmitting device. For example, an antenna port may correspond to an RS. An antenna port may also correspond to a transmission stream.

[0122] The antenna port is used to carry at least one of a specific physical channel and a physical signal. The antenna port is equivalent to the RS port; taking the demodulation reference signal (DMRS) port as an example, the DMRS port is the antenna port that carries the DMRS. The signals sent through the same antenna port, regardless of whether these signals are sent through the same or different physical antennas, the channels corresponding to the paths experienced by these signals in spatial transmission can be considered to be the same or related. In other words, the signals sent at the same antenna port can be considered to have the same or related channels when demodulated by the receiving end. In other words, the antenna port defines the channel on a certain symbol. If the antenna ports of two symbols are the same, the channel on one symbol can be inferred from the channel on another symbol.

[0123] In the embodiment of the present application, the port number is used as an example to identify the antenna port. The port number may also have other names, such as port index, port identification, etc., which are not specifically limited in the embodiment of the present application.

[0124] 4. Multiplexing technology:

[0125] Multiplexing technology refers to the process of combining multiple signals at the transmitting end and transmitting the combined signal on a physical channel, receiving the combined signal on the physical channel at the receiving end, and restoring the combined signal to multiple signals. Multiplexing technology can improve the transmission efficiency of the channel.

[0126] Multiplexing technologies include frequency-division multiplexing (FDM), time-division multiplexing (TDM), and code-division multiplexing (CDM). Based on FDM technology, the RS time domain resources corresponding to different antenna ports are the same, but the frequency domain resources are different. Based on TDM technology, the time domain resources corresponding to different antenna ports are different. The frequency domain resources are different. Based on CDM technology, the time-frequency resources corresponding to different antenna ports are the same, but the orthogonal cover code (OCC) codewords are different. In a CDM group, an OCC codeword sequence is used to ensure the orthogonality of the port, thereby reducing the interference of the RS transmitted between ports.

[0127] Optionally, RS includes but is not limited to DMRS, sounding reference signal (SRS), phase tracking reference signal (PTRS), positioning reference signal, channel state information reference signal (CSI-RS), cell reference signal (CRS), etc.

[0128] 5.DMRS:

[0129] DMRS is used for equivalent channel estimation by a receiving device (such as a network device or a terminal device, etc.), and detects a data channel or a control channel based on the equivalent estimated channel result. Exemplarily, the data channel may include a physical downlink shared channel (PDSCH) and / or a physical uplink shared channel (PUSCH). The control channel includes a physical downlink control channel (PDCCH). Taking the data channel as PDSCH as an example, DMRS is usually precoded in the same way as the transmitted data signal, thereby ensuring that DMRS and the data experience the same equivalent channel. Thus, by estimating the equivalent channel experienced by DMRS, multiple-input multiple-output (MIMO) equalization and demodulation of the data signal are achieved.

[0130] Taking the DMRS vector sent by the transmitter as s and the data vector sent as x as an example, after the DMRS and the data are subjected to the same precoding operation, the signal vector received by the receiver can be expressed as follows:

[0131]

[0132] Among them, y represents the received signal corresponding to the data vector x, r represents the received signal corresponding to the DMRS vector s, and P represents the precoding matrix. It is represented as the equivalent channel experienced by the data vector x or DMRS vector s.

[0133] Exemplarily, the receiving end may estimate the equivalent channel experienced by the DMRS using a channel estimation algorithm (such as least square (LS) signal estimation, minimum mean square error (MMSE) channel estimation, etc.).

[0134] In order to ensure the quality of channel estimation, different DMRS ports are usually orthogonal ports. The DMRS corresponding to different DMRS ports are orthogonal in the frequency domain, time-frequency or code domain. Since DMRS occupies certain time-frequency resources, in order to reduce the DMRS overhead as much as possible and reduce the interference between the DMRS time-frequency resources corresponding to different DMRS ports, DMRS is often mapped to preset time-frequency resources through FDM, TDM or CDM. At present, the fifth generation (5th generation, 5G) new wireless (newradio, NR) system supports 2 DMRS resource mapping types (or DMRS configuration types). In each DMRS configuration type, DMRS can occupy one or two OFDM symbols in the time domain. Among them, DMRS occupying one OFDM symbol in the time domain can be called a single symbol, and DMRS occupying two OFDM symbols in the time domain can be called a double symbol.

[0135] Specifically, under the two DMRS configuration types, the number of DMRS ports supported by the protocol may be as shown in Table 1 below:

[0136] Table 1

[0137] DMRS configuration type Type 1 Type2 Single Symbol 4 DMRS ports 6 DMRS ports Double Symbol 8 DMRS ports 12 DMRS ports

[0138] In the above Table 1, when the DMRS configuration type is Type 1 and a single symbol, the number of DMRS ports supported by the protocol is 4 DMRS ports. When the DMRS configuration type is Type 1 and a double symbol, the number of DMRS ports supported by the protocol is 8 DMRS ports. When the DMRS configuration type is Type 2 and a single symbol, the number of DMRS ports supported by the protocol is 6 DMRS ports. When the DMRS configuration type is Type 2 and a double symbol, the number of DMRS ports supported by the protocol is 12 DMRS ports.

[0139] Optionally, the number of ports may be equivalent to any one of the number of transmission layers (or data streams) corresponding to the RS (such as DMRS), the number of layers of data corresponding to the RS, the rank of data corresponding to the RS, the number of streams of the data channel of the RS, the number of layers of the data channel of the RS, and the rank of the data channel of the RS. Taking PDSCH as an example, the port index of the DMRS port corresponding to different DMRS configuration types may be as shown in Table 2 below:

[0140] Table 2

[0141] DMRS configuration type Type 1 Type2 Single Symbol DMRS ports 1000-1003 DMRS ports 1000-1005 Double Symbol DMRS ports 1000-1007 DMRS ports 1000-1011

[0142] In the above Table 2, when the DMRS configuration type is Type 1 and is a single symbol, the port indexes of the DMRS ports supported by the protocol are 1000-1003. When the DMRS configuration type is Type 1 and is a double symbol, the port indexes of the DMRS ports supported by the protocol are 1000-1007. When the DMRS configuration type is Type 2 and is a single symbol, the port indexes of the DMRS ports supported by the protocol are 1000-1005. When the DMRS configuration type is Type 2 and is a double symbol, the port indexes of the DMRS ports supported by the protocol are 1000-1011.

[0143] The above only takes PDSCH as an example for introduction. In the case of PUSCH, when the DMRS configuration type is Type 1 and is a single symbol, the port index of the DMRS port supported by the protocol is 0-3. When the DMRS configuration type is Type 1 and is a double symbol, the port index of the DMRS port supported by the protocol is 0-7. When the DMRS configuration type is Type 2 and is a single symbol, the port index of the DMRS port supported by the protocol is 0-5. When the DMRS configuration type is Type 2 and is a double symbol, the port index of the DMRS port supported by the protocol is 0-11.

[0144] For a DMRS port, in order to perform channel estimation on different time-frequency resources and ensure the quality of channel estimation, it is necessary to send DMRS on multiple time-frequency resources. Among them, DMRS can occupy one or two OFDM symbols in the time domain, and the bandwidth occupied by DMRS in the frequency domain is the same as the scheduling bandwidth of the data signal. For a DMRS port, multiple OFDM symbols corresponding to the port correspond to the same reference signal sequence. Optionally, a reference signal sequence may include multiple reference signal sequence elements. Optionally, the DMRS reference signal sequence may be a pseudo-random (gold) sequence. Taking the DMRS reference signal sequence as a pseudo-random (gold) sequence as an example, the nth element in the DMRS reference signal sequence may satisfy the following relationship (3):

[0145]

[0146] In the above relationship (3), c(n) is represented as a pseudo-random sequence. Let c(n) be a pseudo-random sequence with a sequence length of 31, and the output length of c(n) is M. PN ,n=0,1,…,M PN -1 as an example, c(n) can satisfy the following relationship (4):

[0147] c(n)=(x1(n+N c )+x2(n+N c))mod2 (4)

[0148] Among them, x1(n+31)=(x1(n+3)+x1(n))mod2,

[0149] x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod2

[0150] In the above relationship (4), N c = 1600. The x1(n) sequence can be initialized to x1(0) = 1, x1(n) = 0, n = 1, 2, ..., 31. The x2(n) sequence can be initialized to x1(0) = 1, x1(n) = 0, n = 1, 2, ..., 31. init Initialization. Among them, c init The following relationship (5) can be satisfied:

[0151]

[0152] In the above relationship (5), Represented as the index of an OFDM symbol within a time slot. Represented as the index of a time slot within a system frame. Related to the cell identity (ID) (e.g. is equal to the cell ID, that is ). λ represents the index of the CDM group where the DMRS port is located. is the initialization parameter, The value of can be 0 or 1. In the adjacent DMRS frequency domain positions, different The peak to average power ratio (PAPR) can be reduced.

[0153] Specifically, The following relationship (6) can be satisfied:

[0154]

[0155] When the DMRS sequence initialization indication field is configured in the downlink control information (DCI), the n SCID ∈{0,1}, n is not indicated in DCI SCID The default value is n SCID =0.

[0156] For a DMRS port (port) p, the mth element r(m) in the DMRS sequence corresponding to the port is mapped to the index (k, l) according to the following rules: p,μThe RE of . Among them, the index is (k,l) p,μ The RE of corresponds to an OFDM symbol with index l in a time slot in the time domain and to a subcarrier with index k in the frequency domain. The mapping rule satisfies the following relationship (7):

[0157]

[0158]

[0159] k′=0,1;

[0160]

[0161] n=0,1,…;

[0162] l′=0,1;

[0163] Where p is the port number, μ is the subcarrier spacing parameter, To map to index (k,l) p，u DMRS modulation symbols on RE, is the symbol index of the first OFDM symbol occupied by the DMRS modulation symbol or the symbol index of the reference OFDM symbol, is the power scaling factor, w t (l′) is the time domain mask element corresponding to the l′th OFDM symbol occupied by the DMRS modulation symbol, w f (k') is the frequency domain mask element corresponding to the k'th subcarrier occupied by the DMRS modulation symbol, m = 2n + k', Δ is the subcarrier offset factor. OCC includes the above-mentioned time domain mask element and frequency domain mask element. The time domain mask can also be called time division orthogonal mask (time-division orthogonal cover code, TD-OCC), and the frequency domain mask can also be called frequency division orthogonal mask (frequency-division orthogonal cover code, FD-OCC).

[0164] When the DMRS configuration type is Type 1, the w corresponding to the DMRS port p t (l′), w f The values ​​of (k′) and Δ can be determined according to Table 3A. The introduction of Table 3A is as follows:

[0165] Table 3A

[0166]

[0167] As shown in Table 3A above, when the value of DMRS port p is 1000, the values ​​of λ and Δ are 0. When k′=0, wf The value of (k′) is +1. When k′=1, w f The value of (k') is +1. When l'=0, w t The value of (l') is +1. When l'=1, the value of wt(l') is +1. The other values ​​of the DMRS port p in Table 1 can be deduced by analogy and will not be described in detail here.

[0168] It can be seen from the above Table 3A that when the DMRS configuration type is Type 1, each DMRS port corresponds to two long time domain mask sequences (or, can also be called time division orthogonal mask sequences, i.e., TD-OCC sequences) (i.e., l′=0, l′=1). The TD-OCC sequence includes: {+1, +1}, {+1, -1}. Among them, the TD-OCC sequences of ports 1000 to 1003 are the same, and the TD-OCC sequence is {+1, +1}; the TD-OCC sequences in ports 1004 to 1007 are the same, and the TD-OCC sequence is {+1, -1}.

[0169] In addition, when the DMRS configuration type is Type 1, each DMRS port corresponds to two long frequency domain mask sequences (or, can also be called frequency division orthogonal mask sequences, i.e., FD-OCC sequences) (i.e., k′=0, k′=1). The FD-OCC sequence includes: {+1, +1}, {+1, -1}. Among them, the FD-OCC sequences of port 1000, port 1002, port 1004, and port 1006 are the same, and the FD-OCC sequence is {+1, +1}; the FD-OCC sequences of port 1001, port 1003, port 1003, and port 1007 are the same, and the FD-OCC sequence is {+1, -1}.

[0170] When the DMRS configuration type is Type2, the w corresponding to the DMRS port p t (l′), w f The values ​​of (k′) and Δ can be determined according to Table 3B. The introduction of Table 3B is as follows:

[0171] Table 3B

[0172]

[0173] As shown in Table 3B above, when the value of DMRS port p is 1000, the values ​​of λ and Δ are 0. When k′=0, w f The value of (k′) is +1. When k′=1, w f The value of (k') is +1. When l'=0, w t The value of (l') is +1. When l'=1, wt The value of (l') is +1. The other values ​​of the DMRS port p in Table 3B can be deduced by analogy and will not be described in detail here.

[0174] It can be seen from Table 3B above that when the DMRS configuration type is Type 2, the TD-OCC sequences of ports 1000 to 1005 are the same, and the TD-OCC sequence is {+1, +1}; the TD-OCC sequences in ports 1006 to 1011 are the same, and the TD-OCC sequence is {+1, -1}. In addition, when the DMRS configuration type is Type 2, each DMRS port corresponds to two long frequency domain mask sequences (or, can also be called frequency division orthogonal mask sequences, i.e., FD-OCC sequences) (i.e., k′=0, k′=1). The FD-OCC sequence includes: {+1, +1}, {+1, -1}. Among them, the FD-OCC sequence of port 1000, port 1002, port 1004, port 1006, port 1008, and port 1010 is the same, and the FD-OCC sequence is {+1, +1}; the FD-OCC sequence of port 1001, port 1003, port 1003, port 1007, port 1009, and port 1011 is the same, and the FD-OCC sequence is {+1, -1}.

[0175] Optionally, when the value of the DMRS port p is 1000, the DMRS port may be referred to as port 1000, or may also be referred to as port 0. The same may be applied to other values ​​of the DMRS port p, which will not be described in detail herein.

[0176] Based on the four cases in Table 1 or Table 2, the time-frequency resource mapping method of the above relationship (7) corresponds to different implementations. The time-frequency resource mapping methods in the four cases are introduced below.

[0177] Case 1: The DMRS configuration type is Type 1 and is a single symbol (corresponding to l′=0). In this case, the number of DMRS ports supported by the protocol is 4 DMRS ports.

[0178] The four DMRS ports can be divided into two CDM groups. CDM group 0 includes port 1000 and port 1001, and CDM group 1 includes port 1002 and port 1003. The CDM groups are distinguished by FDM (i.e., mapped on different frequency domain resources). The DMRS ports contained in a CDM group are mapped on the same time-frequency resources. The reference signals corresponding to the DMRS ports contained in a CDM group are distinguished by OCC to ensure the orthogonality of the DMRS ports in the CDM group, thereby suppressing the interference between the reference signals transmitted on different DMRS ports.

[0179] Specifically, port 1000 and port 1001 are located in the same RE, and resource mapping is performed in a comb-tooth manner in the frequency domain, that is, the adjacent frequency domain resources occupied by port 1000 and port 1001 are separated by one subcarrier. For example, taking the same time domain resource as symbol 2 and the frequency domain resource granularity as 1 RB as an example, the frequency domain resources occupied by port 1000 and port 1001 can be Figure 2 Subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8, and subcarrier 10 are shown in (a) of FIG. Similarly, the frequency domain resources occupied by port 1002 and port 1003 can be Figure 2 Subcarrier 1, subcarrier 3, subcarrier 5, subcarrier 7, subcarrier 9, and subcarrier 11 are shown in (a).

[0180] For two DMRS ports included in a CDM group, the length of the OCC sequence corresponding to the REs occupied by the two DMRS ports is 2. Exemplarily, the OCC codeword sequences of ports 1000 and 1001 included in CDM group 0, respectively mapped to corresponding REs in an RB, can be determined according to Table 4. Table 4 is described as follows:

[0181] Table 4

[0182] 1000 1001 RE0 +1 +1 RE 2 +1 -1 RE 4 +1 +1 RE 6 +1 -1 RE 8 +1 +1 RE10 +1 -1

[0183] For example, RE0 in Table 4 above may be Figure 2 The RE corresponding to symbol 2 and subcarrier 0 shown in (a) of FIG. 1 can be Figure 2 The RE corresponding to symbol 2 and subcarrier 2, RE4 can be Figure 2 The RE corresponding to symbol 2 and subcarrier 4 shown in (a) of FIG. 1 and RE6 can be Figure 2 The RE corresponding to symbol 2 and subcarrier 6 shown in (a) of FIG. 1 and RE8 can be Figure 2 The RE corresponding to symbol 2 and subcarrier 8 shown in (a) of FIG. 1 and RE10 can be Figure 2 The RE corresponding to symbol 2 and subcarrier 10 shown in (a).

[0184] As shown in Table 4 above, the OCC sequence corresponding to RE0 occupied by ports 1000 and 1001 is {+1, +1}. Other values ​​of RE occupied by ports 1000 and 1001, and other values ​​of RE occupied by ports 1002 and 1003 can be deduced by analogy and will not be repeated here.

[0185] The OCC codeword sequences mapped to the corresponding REs in one RB by the ports 1002 and 1003 included in the CDM group 1 can be determined according to Table 5. The introduction of Table 5 is as follows:

[0186] Table 5

[0187]

[0188]

[0189] For example, RE1 in Table 5 above may be Figure 2 The RE and RE3 corresponding to the symbol 2 and subcarrier 1 shown in (a) can be Figure 2 The RE corresponding to symbol 2 and subcarrier 3 shown in (a) of FIG. 1 and RE5 can be Figure 2 The RE corresponding to symbol 2 and subcarrier 5 shown in (a) of FIG. 1 and RE7 can be Figure 2 The symbol 2 and the RE9 corresponding to the subcarrier 7 shown in (a) can be Figure 2 The RE corresponding to symbol 2 and subcarrier 9 shown in (a) of FIG. 1 and RE11 can be Figure 2 The RE corresponding to symbol 2 and subcarrier 11 shown in (a).

[0190] As shown in Table 5 above, the OCC sequence corresponding to RE1 occupied by ports 1002 and 1003 is {+1, +1}. Other values ​​of RE occupied by ports 1002 and 1003 can be deduced by analogy and will not be described in detail here.

[0191] Case 2: The DMRS configuration type is Type 1, and it is a double symbol (corresponding to l′=0 and l′=1). In this case, the number of DMRS ports supported by the protocol is 8 DMRS ports.

[0192] The 8 DMRS ports can be divided into 2 CDM groups. CDM group 0 includes port 1000, port 1001, port 1004, and port 1005, and CDM group 1 includes port 1002, port 1003, port 1006, and port 1007. The CDM groups are distinguished by FDM (i.e., mapped on different frequency domain resources). The DMRS ports contained in a CDM group are mapped on the same time-frequency resources. The reference signals corresponding to the DMRS ports contained in a CDM group are distinguished by OCC to ensure the orthogonality of the DMRS ports in the CDM group, thereby suppressing the interference between the reference signals transmitted on different DMRS ports.

[0193] Specifically, port 1000, port 1001, port 1004, and port 1005 are located in the same RE, and resource mapping is performed in a comb-tooth manner in the frequency domain, that is, one subcarrier is spaced between adjacent frequency domain resources occupied by port 1000, port 1001, port 1004, and port 1005. Exemplarily, taking the same time domain resources as symbol 2 and symbol 3, and the frequency domain resource granularity as 1 RB as an example, the frequency domain resources occupied by port 1000, port 1001, port 1004, and port 1005 can be Figure 2 Subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8, and subcarrier 10 are shown in (b) of FIG. Similarly, the frequency domain resources occupied by port 1002, port 1003, port 1006, and port 1007 can be Figure 2 Subcarrier 1, subcarrier 3, subcarrier 5, subcarrier 7, subcarrier 9, and subcarrier 11 are shown in (b).

[0194] For the 4 DMRS ports included in a CDM group, the OCC sequence length corresponding to the REs occupied by the 4 DMRS ports is 4. Exemplarily, the OCC codeword sequences of ports 1000, 1001, 1004, and 1005 included in CDM group 0, respectively mapped to corresponding REs in an RB, can be determined according to Table 6. Table 6 is described as follows:

[0195] Table 6

[0196]

[0197] In the above Table 6, l' is the relative index of the OFDM symbol occupied by the DMRS modulation symbol. Figure 2 As shown in (b), the OFDM symbols occupied by the DMRS modulation symbol are symbol 2 and symbol 3. At this time, l′=0 corresponds to symbol 2, and l′=1 corresponds to symbol 3. Therefore, the OCC codeword sequence corresponding to subcarrier 0 and l′=0 is the OCC codeword sequence on the RE corresponding to subcarrier 0 and symbol 2. The other values ​​of the OCC codeword sequence on the RE in Table 6 can be deduced by analogy and will not be repeated here.

[0198] As shown in Table 6 above, when l′=0, the OCC sequence corresponding to the REs occupied by port 1000, port 1001, port 1004, and port 1005 is {+1, +1, +1, +1}; when l′=1, the OCC sequence corresponding to the REs occupied by port 1000, port 1001, port 1004, and port 1005 is {+1, +1, -1, -1}; other values ​​of REs occupied by port 1000, port 1001, port 1004, and port 1005 can be deduced by analogy and will not be repeated here.

[0199] The OCC codeword sequences of ports 1002, 1003, 1006, and 1007 included in CDM group 1 and mapped to corresponding REs in one RB can be determined according to Table 7. Table 7 is described as follows:

[0200] Table 7

[0201]

[0202]

[0203] In the above Table 7, l' is the relative index of the OFDM symbol occupied by the DMRS modulation symbol. Figure 2 As shown in (b), the OFDM symbols occupied by the DMRS modulation symbol are symbol 2 and symbol 3. At this time, l′=0 corresponds to symbol 2, and l′=1 corresponds to symbol 3. Therefore, the OCC codeword sequence corresponding to subcarrier 1 and l′=0 is the OCC codeword sequence on the RE corresponding to subcarrier 1 and symbol 2. The other values ​​of the OCC codeword sequence on the RE in Table 7 can be deduced by analogy and will not be repeated here.

[0204] As shown in Table 7 above, when l′=0, the OCC sequence corresponding to the REs occupied by port 1002, port 1003, port 1006, and port 1007 is {+1, +1, +1, +1}; when l′=1, the OCC sequence corresponding to the REs occupied by port 1002, port 1003, port 1006, and port 1007 is {+1, +1, -1, -1}; other values ​​of REs occupied by port 1002, port 1003, port 1006, and port 1007 can be deduced by analogy and will not be repeated here.

[0205] Case 3: The DMRS configuration type is Type 2 and is a single symbol (corresponding to l′=0). In this case, the number of DMRS ports supported by the protocol is 6 DMRS ports.

[0206] The 6 DMRS ports can be divided into 3 CDM groups. CDM group 0 includes port 1000 and port 1001, CDM group 1 includes port 1002 and port 1003, and CDM group 2 includes port 1004 and port 1005. The CDM groups are distinguished by FDM (i.e., mapped on different frequency domain resources). The DMRS ports contained in a CDM group are mapped on the same time-frequency resources. The reference signals corresponding to the DMRS ports contained in a CDM group are distinguished by OCC to ensure the orthogonality of the DMRS ports in the CDM group, thereby suppressing the interference between the reference signals transmitted on different DMRS ports.

[0207] For a DMRS port, its corresponding DMRS is mapped in the frequency domain to multiple resource sub-blocks containing two consecutive sub-carriers, and the adjacent resource blocks are separated by 4 sub-carriers in the frequency domain. Specifically, port 1000 and port 1001 are located in the same RE, and resource mapping is performed in a comb-tooth manner in the frequency domain. Taking the same time domain resource as symbol 2 and the frequency domain resource granularity as 1 RB as an example, the frequency domain resources occupied by port 1000 and port 1001 can be Figure 2 0, subcarrier 1, subcarrier 6, and subcarrier 7 as shown in (c) of FIG. Similarly, port 1002 and port 1003 are located in the same RE, and resource mapping is performed in a comb-tooth manner in the frequency domain. Taking the same time domain resource as symbol 2 and the frequency domain resource granularity as 1 RB as an example, the frequency domain resources occupied by port 1002 and port 1003 can be Figure 2 Carrier 2, subcarrier 3, subcarrier 8, and subcarrier 9 are shown in (c) of FIG. Port 1004 and port 1005 are located in the same RE, and resource mapping is performed in a comb-tooth manner in the frequency domain. Taking the same time domain resource as symbol 2 and the frequency domain resource granularity as 1 RB as an example, the frequency domain resources occupied by port 1004 and port 1005 can be Figure 2 Subcarrier 4, subcarrier 5, subcarrier 10, and subcarrier 11 are shown in (c).

[0208] For two DMRS ports included in a CDM group, the length of the OCC sequence corresponding to the REs occupied by the two DMRS ports is 2. Exemplarily, the OCC codeword sequences of ports 1000 and 1001 included in CDM group 0, respectively mapped to corresponding REs in an RB, can be determined according to Table 8. Table 8 is described as follows:

[0209] Table 8

[0210] 1000 1001 RE0 +1 +1 RE1 +1 -1 RE6 +1 +1 RE7 +1 -1

[0211] The OCC codeword sequences mapped to the corresponding REs in one RB by the ports 1002 and 1003 included in the CDM group 1 can be determined according to Table 9. The introduction of Table 9 is as follows:

[0212] Table 9

[0213] 1002 1003 RE2 +1 +1 RE3 +1 -1 RE8 +1 +1 RE9 +1 -1

[0214] The OCC codeword sequences mapped to the corresponding REs in one RB by the ports 1004 and 1005 included in the CDM group 3 can be determined according to Table 10. The introduction of Table 10 is as follows:

[0215] Table 10

[0216] 1004 1005 RE4 +1 +1 RE5 +1 -1 RE10 +1 +1 RE11 +1 -1

[0217] In the above table 7, RE0, RE1, RE6, and RE7 are Figure 2 The corresponding relationship in RB shown in (c) in Table 8, RE2, RE3, RE8, RE9 in Figure 2 The corresponding relationship in RB shown in (c) in Table 9, RE4, RE5, RE10, RE11 Figure 2 The corresponding relationship in RB shown in (c) can refer to RE0, RE2, RE4, RE6... in Table 4 above. Figure 2 The corresponding relationship in RB shown in (a) in Table 5, or RE1, RE3, RE5, RE7... in Figure 2 The relevant description between the corresponding relationships in the RBs shown in (a) will not be repeated here.

[0218] Case 4: The DMRS configuration type is Ttype2, and it is a dual-symbol DMRS (corresponding to l′=0 and l′=1). In this case, the number of DMRS ports supported by the protocol is 12 DMRS ports.

[0219] The 12 ports can be divided into 3 CDM groups. CDM group 0 includes port 1000, port 1001, port 1006 and port 1007, CDM group 1 includes port 1002, port 1003, port 1008 and port 1009, and CDM group 2 includes port 1004, port 1005, port 1010 and port 1011. CDM groups are distinguished by FDM. The DMRS ports contained in a CDM group are mapped to the same time-frequency resources. The RSs corresponding to the DMRS ports contained in a CDM group are distinguished by OCC to ensure the orthogonality of the DMRS ports in the CDM group, thereby suppressing the interference between the RSs transmitted on different DMRS ports.

[0220] For a DMRS port, its corresponding DMRS is mapped in the frequency domain to multiple resource subblocks containing two consecutive subcarriers, and adjacent resource subblocks are separated by four subcarriers in the frequency domain. Specifically, port 1000, port 1001, port 1006, and port 1007 are located in the same RE, and resource mapping is performed in a comb-tooth manner in the frequency domain. Taking the same time domain resources as symbol 2 and symbol 3, and the frequency domain resource granularity of 1 RB as an example, the frequency domain resources occupied by port 1000, port 1001, port 1006, and port 1007 can be Figure 2 The subcarrier 0, subcarrier 1, subcarrier 6, and subcarrier 7 shown in (d) in FIG. Similarly, the frequency domain resources occupied by ports 1002, 1003, 1008, and 1009 can be Figure 2The frequency domain resources occupied by ports 1004, 1005, 1010, and 1011 may be as follows: Figure 2 Subcarrier 4, subcarrier 5, subcarrier 10, and subcarrier 11 are shown in (d).

[0221] For the four DMRS ports included in a CDM group, the length of the OCC sequence corresponding to the REs occupied by the two DMRS ports is 4. Exemplarily, the OCC codeword sequences of the ports 1000, 1001, 1006 and 1007 included in CDM group 0, which are respectively mapped to the corresponding REs in an RB, can be determined according to Table 11. Table 11 is described as follows:

[0222] Table 11

[0223]

[0224] The OCC codeword sequences of ports 1002, 1003, 1008 and 1009 included in CDM group 1 and mapped to corresponding REs in one RB can be determined according to Table 12. Table 12 is described as follows:

[0225] Table 12

[0226]

[0227] The OCC codeword sequences of the ports 1004, 1005, 1010 and 1011 included in the CDM group 2 and mapped to the corresponding REs in one RB can be determined according to Table 13. The introduction of Table 13 is as follows:

[0228] Table 13

[0229]

[0230] In the above Table 11, subcarrier 0, subcarrier 1, subcarrier 6, and subcarrier 7 are as follows: Figure 2 The corresponding relationship among the subcarriers shown in (d) in Table 12, subcarrier 2, subcarrier 3, subcarrier 8, and subcarrier 9 are shown in Table 12. Figure 2 The corresponding relationship among the subcarriers shown in (d) in Table 13, subcarrier 4, subcarrier 5, subcarrier 10, subcarrier 11 in Table 13 Figure 2 For the corresponding relationship in RB shown in (d) in the above table 6, please refer to subcarrier 0, RE2, subcarrier 4, subcarrier 6, etc. Figure 2 The corresponding relationship in RB shown in (b) in Table 7, or subcarrier 1, subcarrier 3, subcarrier 5, subcarrier 7... in Table 7 Figure 2The relevant description of the corresponding relationship between the subcarriers shown in (b) in the figure will not be repeated here. With the development of wireless communications in the future, the deployment of wireless communication equipment will become more and more dense, and the number of terminal devices will further increase, which will put forward higher requirements on the number of transmission layers (or, it can also be called the number of spatial layers) in the multiple input multiple output (MIMO) technology. In addition, with the continuous evolution of the massive MIMO system, the number of transmitting and receiving antennas has further increased (for example, the number of transmitting antennas supported by the network device is 128 or 256 (or, it can also be called that the number of transmitting (transmit, T) antennas of the network device supports 128T or 256T), and the number of receiving antennas supported by the terminal device is 8 (or, it can also be called that the number of receiving (receive, R) antennas of the terminal device supports 8R), so that the channel information acquisition is more accurate, so that a higher number of transmission layers can be further supported to improve the spectrum efficiency of the MIMO system. However, the increase in the number of transmission layers (that is, more than 12 layers) will inevitably require more DMRS ports to support. And with the increase in the number of transmission layers, the accuracy of channel estimation is required to be higher.

[0231] However, the 12 DMRS ports supported by the 3rd Generation Partnership Project (3GPP) Release 15 (R15) protocol cannot guarantee good performance for transmissions greater than 12 layers. Therefore, in 3GPP Release 18 (R18), the number of DMRS ports is enhanced, so that the number of DMRS ports supported by the R18 protocol is 24 DMRS ports.

[0232] Specifically, the number of DMRS ports supported by the R18 protocol may be shown in Table 14 below:

[0233] Table 14

[0234] DMRS configuration type Type 1 Type2 Single Symbol 8 DMRS ports 12 DMRS ports Double Symbol 16 DMRS ports 24 DMRS ports

[0235] In the above Table 14, when the DMRS configuration type is Type 1 and is a single symbol, the number of DMRS ports supported by the protocol is 8 DMRS ports. When the DMRS configuration type is Type 1 and is a double symbol, the number of DMRS ports supported by the protocol is 16 DMRS ports. When the DMRS configuration type is Type 2 and is a single symbol, the number of DMRS ports supported by the protocol is 12 DMRS ports. When the DMRS configuration type is Type 2 and is a double symbol, the number of DMRS ports supported by the protocol is 24 DMRS ports.

[0236] Taking PDSCH as an example, the port index of the DMRS port corresponding to different DMRS configuration types may be as shown in Table 15 below:

[0237] Table 15

[0238] DMRS configuration type Type 1 Type2 Single Symbol DMRS ports 1000-1003, 1008-1011 DMRS ports 1000-1005, 1012-1017 Double Symbol DMRS ports 1000-1015 DMRS ports 1000-1023

[0239] In the above Table 15, when the DMRS configuration type is Type 1 and is a single symbol, the port indexes of the DMRS ports supported by the R18 protocol are 1000-1003 and 1008-1011. Among them, DMRS ports 1000-1003 are DMRS ports defined in the R15 protocol (or, they can also be called legacy ports). DMRS ports 1008-1011 are DMRS ports newly defined in the R18 protocol (or, they can also be called enhanced ports).

[0240] When the DMRS configuration type is Type 1 and is double-symbol, the port indexes of the DMRS ports supported by the R18 protocol are 1000-1015. Among them, DMRS ports 1000-1007 are DMRS ports defined in the R15 protocol. DMRS ports 1008-1015 are DMRS ports newly defined in the R18 protocol.

[0241] When the DMRS configuration type is Type 2 and is a single symbol, the port indexes of the DMRS ports supported by the R18 protocol are 1000-1005 and 1012-1017. Among them, DMRS ports 1000-1005 are DMRS ports defined in the R15 protocol. DMRS ports 1012-1017 are newly defined DMRS ports in the R18 protocol.

[0242] When the DMRS configuration type is Type 2 and is double-symbol, the port indexes of the DMRS ports supported by the R18 protocol are 1000-1023. Among them, DMRS ports 1000-10011 are DMRS ports defined in the R15 protocol. DMRS ports 1012-1023 are newly defined DMRS ports in the R18 protocol.

[0243] The above only takes PDSCH as an example for introduction. For PUSCH, when the DMRS configuration type is Type 1 and is a single symbol, the port indexes of the DMRS ports supported by the R18 protocol are 0-3 and 8-11. When the DMRS configuration type is Type 1 and is a double symbol, the port indexes of the DMRS ports supported by the R18 protocol are 0-15. When the DMRS configuration type is Type2 and is a single symbol, the port indexes of the DMRS ports supported by the R18 protocol are 0-5 and 12-17. When the DMRS configuration type is Type 2 and is a double symbol, the port indexes of the DMRS ports supported by the R18 protocol are 0-23. Optionally, since the DMRS ports under different DMRS configuration types are enhanced in the R18 protocol, in the R18 protocol, the DMRS configuration type can also be called an enhanced DMRS configuration type, or can also be simply referred to as an enhanced type. At this time, Type1 can be called enhanced type (enhanced type, eType) 1, and Type2 can be called eType2.

[0244] For the 24 DMRS ports supported by the R18 protocol, time-frequency resource mapping can be achieved in the following two ways:

[0245] In a possible implementation, the time-frequency resources occupied by DMRS are increased so that the number of DMRS symbols corresponding to each of the 24 DMRS ports remains unchanged. However, the exponential increase in DMRS overhead will exponentially reduce the spectrum efficiency of the system.

[0246] In another possible implementation, while ensuring the same time-frequency resources (overhead), more DMRS resources corresponding to orthogonal DMRS ports are reused. That is, in order not to increase the additional time-frequency resource overhead, on the basis of the existing NR DMRS port (i.e., 12 DMRS ports supported by the R15 protocol), a new DMRS port is further introduced through code division multiplexing enhancement.

[0247] Optionally, in this possible implementation, for a DMRS port (port) p, the mth element r(m) in the DMRS sequence corresponding to the port is mapped to the index (k, l) according to the following rule: p,μ The RE of . Among them, the index is (k,l) p,μ The RE of corresponds to an OFDM symbol with index l in a time slot in the time domain and to a subcarrier with index k in the frequency domain. The mapping rule satisfies the following relationship (8):

[0248]

[0249]

[0250] k′=0,1,2,3;

[0251]

[0252] n=0,1,…;

[0253] l′=0,1;

[0254] j=0,1,…,υ-1

[0255] Where p is the port number, μ is the subcarrier spacing parameter, To map to index (k,l) p，μ DMRS modulation symbols on RE, is the symbol index of the first OFDM symbol occupied by the DMRS modulation symbol or the symbol index of the reference OFDM symbol, is the power scaling factor, w t (l′) is the time domain mask element corresponding to the l′th OFDM symbol occupied by the DMRS modulation symbol, w f (k′) is the frequency domain mask element corresponding to the k′th subcarrier occupied by the DMRS modulation symbol, Δ is the subcarrier offset factor, and j represents the number of data streams.

[0256] The following introduces the values ​​of the parameters in relation (8) for PDSCH and PUSCH respectively.

[0257] (1) For PUSCH:

[0258] When the DMRS configuration type is Type 1, the w corresponding to the DMRS port p t (l′), w f The values ​​of (k′) and Δ can be determined according to Table 16. The introduction of Table 16 is as follows:

[0259] Table 16

[0260]

[0261]

[0262] It can be seen from Table 16 above that when the DMRS configuration type is Type 1, the TD-OCC sequences of port 0-port 3 and port 8-port 11 are the same, and the TD-OCC sequence is {+1, +1}; the TD-OCC sequences of port 4-port 7 and port 12-port 15 are the same, and the TD-OCC sequence is {+1, -1}.

[0263] In addition, when the DMRS configuration type is Type 1, each DMRS port corresponds to four long frequency domain mask sequences (or, can also be called frequency division orthogonal mask sequences, i.e., FD-OCC sequences (i.e., k′=0, k′=1, k′=2, k′=3)). The FD-OCC sequence includes: {+1, +1, +1, +1}, {+1, -1, +1, -1}, {+1, +j, -1, -j}, {+1, -j, -1, +j}. Among them, the frequency domain mask sequence corresponding to each DMRS port defined by the R15 protocol (i.e., any DMRS port from port 0 to port 7) can be {+1, +1, +1, +1} or {+1, -1, +1, -1}. For example, the FD-OCC sequence of port 0, port 2, port 4, and port 6 is the same, and the FD-OCC sequence is {+1, +1, +1, +1}; the FD-OCC sequence of port 1, port 3, port 5, and port 7 is the same, and the FD-OCC sequence is {+1, -1, +1, -1}. The frequency domain mask sequence corresponding to each DMRS port newly defined in the R18 protocol (i.e., any DMRS port from port 8 to port 15) can be {+1, +j, -1, -j} or {+1, -j, -1, +j}. For example, the FD-OCC sequence of port 8, port 10, port 12, and port 14 is the same, and the FD-OCC sequence is {+1, +j, -1, -j}; the FD-OCC sequence of port 9, port 11, port 13, and port 15 is the same, and the FD-OCC sequence is {+1, -j, -1, +j}.

[0264] When the DMRS configuration type is Type2, the w corresponding to the DMRS port p t (l′), w f The values ​​of (k′) and Δ can be determined according to Table 17. The introduction of Table 17 is as follows:

[0265] Table 17

[0266]

[0267]

[0268] It can be seen from Table 17 above that when the DMRS configuration type is Type 2, the TD-OCC sequences of port 0 to port 5 and port 12 to port 17 are the same, and the TD-OCC sequence is {+1, +1}; the TD-OCC sequences of port 6 to port 11 and port 18 to port 23 are the same, and the TD-OCC sequence is {+1, -1}.

[0269] In addition, when the DMRS configuration type is Type 2, each DMRS port corresponds to four long frequency domain mask sequences (or, can also be called frequency division orthogonal mask sequences, i.e., FD-OCC sequences (i.e., k′=0, k′=1, k′=2, k′=3)). The FD-OCC sequence includes: {+1, +1, +1, +1}, {+1, -1, +1, -1}, {+1, +j, -1, -j}, {+1, -j, -1, +j}. Among them, the frequency domain mask sequence corresponding to each DMRS port defined by the R15 protocol (i.e., any DMRS port from port 0 to port 11) can be {+1, +1, +1, +1} or {+1, -1, +1, -1}. For example, the FD-OCC sequence of port 0, port 2, port 4, port 6, port 8, and port 10 is the same, and the FD-OCC sequence is {+1, +1, +1, +1}; the FD-OCC sequence of port 1, port 3, port 5, port 7, port 9, and port 11 is the same, and the FD-OCC sequence is {+1, -1, +1, -1}. The frequency domain mask sequence corresponding to each DMRS port newly defined in the R18 protocol (i.e., any DMRS port from port 12 to port 23) can be {+1, +j, -1, -j} or {+1, -j, -1, +j}. For example, the FD-OCC sequence of port 12, port 14, port 16, port 18, port 20, and port 22 is the same, which is {+1, +j, -1, -j}; the FD-OCC sequence of port 13, port 15, port 17, port 19, port 21, and port 23 is the same, which is {+1, -j, -1, +j}.

[0270] (2) For PDSCH:

[0271] When the DMRS configuration type is Type 1, the w corresponding to the DMRS port p t (l′), w f The values ​​of (k′) and Δ can be determined according to Table 7. The introduction of Table 18 is as follows:

[0272] Table 18

[0273]

[0274] It can be seen from Table 18 above that when the DMRS configuration type is Type 1, the TD-OCC sequences of port 1000-port 1003 and port 1008-port 1011 are the same, and the TD-OCC sequence is {+1, +1}; the TD-OCC sequences of port 1004-port 1007 and port 1012-port 1015 are the same, and the TD-OCC sequence is {+1, -1}.

[0275] In addition, when the DMRS configuration type is Type 1, each DMRS port corresponds to four long frequency domain mask sequences (or, can also be called frequency division orthogonal mask sequences, i.e., FD-OCC sequences (i.e., k′=0, k′=1, k′=2, k′=3)). The FD-OCC sequence includes: {+1, +1, +1, +1}, {+1, -1, +1, -1}, {+1, +1, -1, -1}, {+1, -1, -1, +1}. Among them, the frequency domain mask sequence corresponding to each DMRS port defined by the R15 protocol (i.e., any DMRS port from port 1000 to port 1007) can be {+1, +1, +1, +1} or {+1, -1, +1, -1}. For example, the FD-OCC sequence of port 1000, port 1002, port 1004, and port 1006 is the same, and the FD-OCC sequence is {+1, +1, +1, +1}; the FD-OCC sequence of port 1001, port 1003, port 1005, and port 1007 is the same, and the FD-OCC sequence is {+1, -1, +1, -1}. The frequency domain mask sequence corresponding to each DMRS port newly defined in the R18 protocol (i.e., any DMRS port from port 1008 to port 1015) can be {+1, -1, +1, -1} or {+1, -1, -1, +1}. For example, the FD-OCC sequence of port 1008, port 1010, port 1012, and port 1014 is the same, which is {+1, -1, +1, -1}; the FD-OCC sequence of port 1009, port 1011, port 1013, and port 1015 is the same, which is {+1, -1, -1, +1}.

[0276] When the DMRS configuration type is Type2, the w corresponding to the DMRS port p t (l′), w f The values ​​of (k′) and Δ can be determined according to Table 19. The introduction of Table 19 is as follows:

[0277] Table 19

[0278]

[0279] It can be seen from Table 19 above that when the DMRS configuration type is Type 2, the TD-OCC sequences of port 1000-port 1005 and port 1012-port 1017 are the same, and the TD-OCC sequence is {+1, +1}; the TD-OCC sequences of port 1006-port 1011 and port 1018-port 1023 are the same, and the TD-OCC sequence is {+1, -1}.

[0280] In addition, when the DMRS configuration type is Type 2, each DMRS port corresponds to four long frequency domain mask sequences (or, can also be called frequency division orthogonal mask sequences, i.e., FD-OCC sequences (i.e., k′=0, k′=1, k′=2, k′=3)). The FD-OCC sequence includes: {+1, +1, +1, +1}, {+1, -1, +1, -1}, {+1, +1, -1, -1}, {+1, -1, -1, +1}. Among them, the frequency domain mask sequence corresponding to each DMRS port defined by the R15 protocol (i.e., any DMRS port from port 1000 to port 1011) can be {+1, +1, +1, +1} or {+1, -1, +1, -1}. For example, the FD-OCC sequence of port 1000, port 1002, port 1004, port 1006, port 1008, and port 1010 is the same, and the FD-OCC sequence is {+1, +1, +1, +1}; the FD-OCC sequence of port 1001, port 1003, port 1005 port 1007, port 1009, and port 1011 is the same, and the FD-OCC sequence is {+1, -1, +1, -1}. The frequency domain mask sequence corresponding to each DMRS port newly defined in the R18 protocol (i.e., any DMRS port from port 1012 to port 1023) can be {+1, +1, -1, -1} or {+1, -1, -1, +1}. For example, the FD-OCC sequence of port 1012, port 1014, port 1016, port 1018, port 1020, and port 1022 is the same, which is {+1, +1, -1, -1}; the FD-OCC sequence of port 1013, port 1015, port 1017, port 1019, port 1021, and port 1023 is the same, which is {+1, -1, -1, +1}.

[0281] Based on the four cases in Table 14 or Table 15, the time-frequency resource mapping method of the above relationship (8) corresponds to different implementations. The time-frequency resource mapping methods in the four cases are introduced below.

[0282] Case 5: DMRS configuration type is Type 1 and is a single symbol (corresponding to l'=0). At this time, the number of DMRS ports supported by the R18 protocol is 8 DMRS ports. DMRS ports 1000-1003 are ports defined in the R15 protocol. DMRS ports 1008-1011 are ports newly defined in the R18 protocol.

[0283] The 8 DMRS ports can be divided into 2 CDM groups. Among them, CDM group 0 includes port 1000, port 1001, port 1008, port 1009, and CDM group 1 includes port 1002, port 1003, port 1010, and port 1011. Among them, the DMRS ports in the same CDM group are located in the same RE, that is, the time-frequency resources of the DMRS ports in the same CDM group are the same. And the DMRS ports in the same CDM group are resource mapped in the frequency domain in a comb-tooth manner, that is, the adjacent frequency domain resources occupied by the DMRS ports in the same CDM group are separated by one subcarrier.

[0284] For example, taking the same time domain resource as symbol 2 and the frequency domain resource granularity as 1 RB as an example, the frequency domain resources occupied by port 1000, port 1001, port 1008, and port 1009 can be Figure 2 Subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8, and subcarrier 10 are shown in (a) of FIG. Similarly, the frequency domain resources occupied by 1002, port 1003, port 1010, and port 1011 can be Figure 2 Subcarrier 1, subcarrier 3, subcarrier 5, subcarrier 7, subcarrier 9, and subcarrier 11 are shown in (a).

[0285] Case 6: The DMRS configuration type is Type 1, and it is a double symbol (corresponding to l'=0 and l'=1). At this time, the number of DMRS ports supported by the R18 protocol is 16 DMRS ports. Among them, DMRS ports 1000-1007 are DMRS ports defined in the R15 protocol. DMRS ports 1008-1015 are DMRS ports newly defined in the R18 protocol.

[0286] The 16 DMRS ports can be divided into 2 CDM groups. CDM group 0 includes port 1000, port 1001, port 1008, port 1009, port 1004, port 1005, port 1012, and port 1013, and CDM group 1 includes port 1002, port 1003, port 1010, port 1011, port 1006, port 1007, port 1014, and port 1015. And the DMRS ports in the same CDM group are resource mapped in the frequency domain in a comb-tooth manner, that is, the adjacent frequency domain resources occupied by the DMRS ports in the same CDM group are separated by one subcarrier.

[0287] For example, taking the same time domain resources as symbol 2 and symbol 3, and the frequency domain resource granularity as 1 RB, the frequency domain resources occupied by ports 1000, 1001, 1008, 1009, 1004, 1005, 1012, and 1013 can be Figure 2Subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8, and subcarrier 10 are shown in (b) of FIG. Similarly, the frequency domain resources occupied by ports 1002, 1003, 1010, 1011, 1006, 1007, 1014, and 1015 can be Figure 2 Subcarrier 1, subcarrier 3, subcarrier 5, subcarrier 7, subcarrier 9, and subcarrier 11 are shown in (b).

[0288] Case 7: The DMRS configuration type is Type 2 and is a single symbol (corresponding to l′=0). In this case, the number of DMRS ports supported by the protocol is 12 DMRS ports. Among them, DMRS ports 1000-1005 are DMRS ports defined in the R15 protocol. DMRS ports 1012-1017 are DMRS ports newly defined in the R18 protocol.

[0289] The 12 DMRS ports can be divided into 3 CDM groups. CDM group 0 includes port 1000, port 1001, port 1012, and port 1013, CDM group 1 includes port 1002, port 1003, port 1014, and port 1015, and CDM group 2 includes port 1004, port 1005, port 1016, and port 1017. The DMRS ports in the same CDM group are located in the same RE, that is, the time-frequency resources of the DMRS ports in the same CDM group are the same.

[0290] For a DMRS port, its corresponding DMRS is mapped in the frequency domain to multiple resource sub-blocks containing two consecutive sub-carriers, and the adjacent resource blocks are separated by 4 sub-carriers in the frequency domain. For example, taking the same time domain resource as symbol 2 and the frequency domain resource granularity as 1 RB as an example, the frequency domain resources occupied by port 1000, port 1001, port 1012, and port 1013 can be Figure 2 Subcarrier 0, subcarrier 1, subcarrier 6, and subcarrier 7 are shown in (c) of FIG. Similarly, port 1002, port 1003, port 1014, and port 1015 are located in the same RE, and resource mapping is performed in a comb-tooth manner in the frequency domain. Taking the same time domain resource as symbol 2 and the frequency domain resource granularity as 1 RB as an example, the frequency domain resources occupied by port 1002, port 1003, port 1014, and port 1015 can be Figure 2 Carrier 2, subcarrier 3, subcarrier 8, and subcarrier 9 are shown in (c) of FIG. Port 1004, port 1005, port 1016, and port 1017 are located in the same RE, and resource mapping is performed in a comb-tooth manner in the frequency domain. Taking the same time domain resource as symbol 2 and the frequency domain resource granularity as 1 RB as an example, the frequency domain resources occupied by port 1004, port 1005, port 1016, and port 1017 can be Figure 2Subcarrier 4, subcarrier 5, subcarrier 10, and subcarrier 11 are shown in (c).

[0291] Case 8: The DMRS configuration type is Type 2, and it is a dual-symbol DMRS (corresponding to l'=0 and l'=1). At this time, the number of DMRS ports supported by the protocol is 24 DMRS ports. Among them, DMRS ports 1000-10011 are DMRS ports defined in the R15 protocol. DMRS ports 1012-1023 are DMRS ports newly defined in the R18 protocol.

[0292] The 12 ports can be divided into 3 CDM groups. CDM group 0 includes port 1000, port 1001, port 1012, port 1013, port 1006, port 1007, port 1018, and port 1019, CDM group 1 includes port 1002, port 1003, port 1014, port 1015, port 1008, port 1009, port 1020, and port 1021, and CDM group 2 includes port 1004, port 1005, port 1016, port 1017, port 1010, port 1011, port 1022, and port 1023. The DMRS ports in the same CDM group are located in the same RE, that is, the time-frequency resources of the DMRS ports in the same CDM group are the same.

[0293] For a DMRS port, its corresponding DMRS is mapped in the frequency domain to multiple resource sub-blocks containing two consecutive sub-carriers, and the adjacent resource blocks are separated by 4 sub-carriers in the frequency domain. For example, taking the same time domain resource as symbol 2 and the frequency domain resource granularity as 1 RB as an example, the frequency domain resources occupied by port 1000, port 1001, port 1012, port 1013, port 1006, port 1007, port 1018, and port 1019 can be Figure 2 Subcarrier 0, subcarrier 1, subcarrier 6, and subcarrier 7 are shown in (d) in FIG. Similarly, the frequency domain resources occupied by ports 1002, 1003, 1014, 1015, 1008, 1009, 1020, and 1021 can be Figure 2 The frequency domain resources occupied by ports 1004, 1005, 1016, 1017, 1010, 1011, 1022, and 1023 may be as follows: Figure 2 Subcarrier 4, subcarrier 5, subcarrier 10, and subcarrier 11 are shown in (d).

[0294] 6. DMRS port indication:

[0295] The NR protocol defines the DMRS symbols and time-frequency resource mapping methods corresponding to the DMRS ports. During the PDSCH or PUSCH transmission process, the network device notifies the terminal device of the DMRS port allocated to it. Based on the allocated DMRS port, the terminal device performs the DMRS signal reception and channel estimation process at the corresponding resource location (i.e., time-frequency resource) in accordance with the DMRS symbol generation method (such as the above relationship (3)) and the time-frequency resource mapping rules (such as the above relationship (7) or relationship (8)) defined in the protocol. Among them, for PDSCH transmission, the pilot signal is received and the corresponding channel estimation process is performed at the corresponding resource location; for PUSCH transmission, the DMRS pilot signal is sent at the corresponding resource location for the base station to perform uplink channel estimation.

[0296] Exemplarily, the DMRS port notification method defined in the NR protocol is as follows: High-level signaling semi-statically configures the reference signal configuration. Among them, the reference signal configuration includes: DMRS configuration type, the number of OFDM symbols occupied by DMRS in the time domain (or it can also be called the maximum length of DMRS in the time domain, for the convenience of description, it will be referred to as the maximum length below), and enhanced information, wherein the enhanced information indicates whether the DMRS configuration type is an enhanced type. DCI signaling dynamically notifies the assigned DMRS port index. The DMRS port notification method is introduced in detail below.

[0297] First, high-level signaling semi-statically configures reference signal configuration. The reference signal configuration is used to determine the antenna port indication table. Exemplarily, the reference signal configuration includes: DMRS configuration type, maximum length, and enhancement information.

[0298] Under the R18 protocol, the DMRS configuration type is an enhanced type; under the R15 protocol, the DMRS configuration type is not an enhanced type. And because there are four different scenarios corresponding to the R15 protocol and the R18 protocol respectively. Therefore, according to the enhanced information, it can be distinguished whether the reference signal configuration corresponds to one of the four scenarios under the R15 protocol or one of the four scenarios under the R18 protocol. Exemplarily, the enhanced information indicates that the DMRS configuration type is an enhanced type, which can be understood as: the two parameters of DMRS configuration type and maximum length can correspond to one of the four scenarios under the R18 protocol. The enhanced information indicates that the DMRS configuration type is an enhanced type, which can be understood as: the two parameters of DMRS configuration type and maximum length can correspond to one of the four scenarios under the R15 protocol.

[0299] Each case corresponds to an antenna port indication table. That is, there are 8 antenna port indication tables in total. Therefore, the purpose of high-level signaling configuration reference signal configuration is to determine an antenna port indication table from the 8 antenna port indication tables. That is, a unique antenna port indication table can be determined based on the three parameters of DMRS configuration type, maximum length, and enhancement information.

[0300] Exemplarily, the high-level signaling may include radio resource control (RRC) signaling. The network device may configure the reference signal configuration through RRC signaling. Exemplarily, the DMRS configuration type used may be configured through DMRS downlink configuration (DMRS-DownlinkConfig) signaling in the RRC signaling.

[0301] The DMRS-DownlinkConfig signaling may include a DMRS type (dmrs-Type) field, which is used to indicate the DMRS configuration type. Exemplarily, the dmrs-Type field may be represented by 2 bits, for example, when the 2 bits have a value of 01, that is, when dmrs-Type=1, it indicates that the DMRS configuration type is type 1, and when the 2 bits have a value of 10, that is, when dmrs-Type=2, it indicates that the DMRS configuration type is type 2. Alternatively, when the dmrs-Type field is not configured in the DMRS-DownlinkConfig signaling, it indicates that the DMRS configuration type is type 1, and at this time, the type 1 may also be referred to as the default type; that is, when the dmrs-Type field is not configured in the DMRS-DownlinkConfig signaling, the default DMRS configuration type is type 1.

[0302] The DMRS-DownlinkConfig signaling may also include a maximum length (maxLength) field, which is used to indicate the maximum length of the DMRS in the time domain. Exemplarily, the maxLength field may also be represented by 2 bits, for example, when the 2 bits are 01, that is, when maxLength=1, it indicates that the maximum length of the DMRS in the time domain is 1 OFDM, that is, the DMRS occupies 1 OFDM symbol in the time domain. When the 2 bits are 10, that is, when maxLength=2, it indicates that the maximum length of the DMRS in the time domain is 2 OFDM, that is, the DMRS can occupy 1 or 2 OFDM symbols in the time domain; at this time, it can be considered that the DMRS occupies 2 OFDM symbols in the time domain; or the network device can further indicate the number of OFDM symbols occupied by the DMRS in the time domain through the DCI. For the convenience of description, the following is an example of taking maxLength=2 as an example, and considering that the DMRS occupies 2 OFDM symbols in the time domain.

[0303] Alternatively, when there is no maxLength field in the DMRS-DownlinkConfig signaling, it indicates that the maximum length of DMRS in the time domain is 1 OFDM. At this time, the maximum length of 1 OFDM can also be called the default length; that is, when the maxLength field is not configured in the DMRS-DownlinkConfig signaling, the default maximum length of DMRS in the time domain is 1 OFDM.

[0304] The DMRS-DownlinkConfig signaling may also include an enhanced DMRS type (enhanced dmrs-Type) field, the enhanced dmrs-Type field indicating whether the DMRS configuration type is an enhanced type, or the enhanced dmrs-Type field indicating whether the network device is configured with an enhanced DMRS type, or the enhanced dmrs-Type field indicating whether the enhanced DMRS type is configured. Exemplarily, the enhanced dmrs-Type field may also be represented by 1 bit, for example, when the 1 bit is 1, it indicates that the DMRS configuration type is an enhanced type. When the 1 bit is 0, it indicates that the DMRS configuration type is not an enhanced type.

[0305] The following takes PDSCH transmission as an example to introduce the antenna port indication table defined in the R18 protocol. At this time, the enhanced dmrs-Type field indicates that the DMRS configuration type is an enhanced type.

[0306] (1) The DMRS configuration type in the reference signal configuration is Type 1, and the maximum length is 1, that is, dmrs-Type = 1, maxLength = 1. At this time, the antenna port indication table may include the content shown in the following Table 20:

[0307] Table 20

[0308]

[0309]

[0310] In the above Table 20, number of DMRS CDM group(s)without data=1, indicating that the number of DMRS CDM groups without data (or may also be referred to as CDM groups, for the convenience of description, hereinafter referred to as CDM groups) is 1. Further, number of DMRS CDM group(s)without data=1 can also indicate CDM group 0. number of DMRS CDM group(s)without data=2, indicating that the number of CDM groups is 2. Further, number of DMRS CDMgroup(s)without data=2 can also indicate CDM group 0 and CDM group 1.

[0311] Optionally, the value in Table 20 may also be referred to as an index, or may also be referred to as a port index, or may also be referred to as an index value. It is represented as a port index corresponding to a port group (i.e., a DMRS port (DMRS port(s)) in Table 20). The port group includes one or more DMRS ports.

[0312] The protocol stipulates that when the number of transmission layers is less than or equal to 4, a single codeword mapping method is adopted, and when the number of transmission layers is greater than 4, a dual codeword mapping method is adopted. Since the number of antenna ports supported by the protocol is 8 under the reference signal configuration corresponding to Table 20 above. That is, under the reference signal configuration corresponding to Table 20, the maximum number of transmission layers is 8. Therefore, for the port group with the number of DMRS ports less than or equal to 4, a single codeword mapping method is adopted, and for the port group with the number of DMRS ports greater than 4, a dual codeword mapping method is adopted.

[0313] (2) The DMRS configuration type in the reference signal configuration is Type 1, and the maximum length is 2, that is, dmrs-Type = 1, maxLength = 2. At this time, the antenna port indication table may include the content shown in the following Table 21:

[0314] Table 21

[0315]

[0316]

[0317]

[0318] In the above Table 21, number of front-load symbols can be expressed as the maximum length of DMRS in the time domain. Since the number of antenna ports supported by the protocol is 16 under the reference signal configuration corresponding to the above Table 21, that is, under the reference signal configuration corresponding to Table 21, the maximum number of transmission layers is 16. Therefore, for port groups with a number of DMRS ports less than or equal to 4, a single codeword mapping method is adopted, and for port groups with a number of DMRS ports greater than 4, a double codeword mapping method is adopted. The implementation of each parameter in Table 21 can refer to the relevant description of each parameter in Table 20, which will not be repeated here.

[0319] (3) The DMRS configuration type in the reference signal configuration is Type 2, and the maximum length is 1, that is, dmrs-Type = 2, maxLength = 1. At this time, the antenna port indication table may include the content shown in the following Table 22:

[0320] Table 22

[0321]

[0322]

[0323] Since the number of antenna ports supported by the protocol under the reference signal configuration corresponding to Table 22 is 12, that is, under the reference signal configuration corresponding to Table 22, the maximum number of transmission layers is 12. Therefore, for the port group with the number of DMRS ports less than or equal to 4, a single codeword mapping method is adopted, and for the port group with the number of DMRS ports greater than 4, a double codeword mapping method is adopted. The implementation of each parameter in Table 22 can refer to the relevant description of each parameter in Table 20, which will not be repeated here.

[0324] (4) The DMRS configuration type in the reference signal configuration is Type 2, and the maximum length is 2, that is, dmrs-Type = 2, maxLength = 2. At this time, the antenna port indication table may include the content shown in the following Table 23:

[0325] Table 23

[0326]

[0327]

[0328]

[0329]

[0330] Because under the reference signal configuration corresponding to the above Table 23, the number of antenna ports supported by the protocol is 24, that is to say, under the reference signal configuration corresponding to Table 23, the maximum number of transmission layers is 24. Therefore, for the port group whose number of DMRS ports is less than or equal to 4, a single codeword mapping method is adopted, and for the port group whose number of DMRS ports is greater than 4, a double codeword mapping method is adopted. The implementation of each parameter in Table 23 can refer to the relevant description of each parameter in Table 21, which will not be repeated here. In addition, in PDSCH transmission, the terminal device can obtain the number of transmission layers participating in the PDSCH transmission based on the number of DMRS ports in the port group. That is, the network device can indicate the number of transmission layers by indicating the port group.

[0331] The above is a description of some possible implementation forms of the antenna port indication table during PDSCH transmission. The following is a detailed description of possible implementation forms of the antenna port indication table during PUSCH transmission.

[0332] In PUSCH transmission, the network device sends the reference signal configuration and the number of transmission layers to the terminal device, so that the terminal device determines an antenna port indication table according to the reference signal configuration and the number of transmission layers, wherein the number of transmission layers is the number of transmission layers that the terminal device can support.

[0333] Optionally, the transport layer number is reported by the terminal device to the network device.

[0334] Exemplarily, the terminal device determines the antenna port indication table according to the reference signal configuration and the number of transmission layers. Among them, the implementation of the reference signal configuration can refer to the relevant description of the reference signal configuration in the above-mentioned PDSCH transmission, which will not be repeated here. The number of transmission layers can be carried in the DCI. That is, after the terminal device receives the RRC signaling carrying the reference signal configuration, it can determine one of the antenna port indication tables from the above-mentioned 8 antenna port indication tables as the initial table. After receiving the DCI carrying the number of transmission layers, a new table is determined from the determined antenna port indication table. The new table includes the antenna port information in the initial table whose number of transmission layers is the number of transmission layers indicated by the DCI.

[0335] Taking the above Table 20 (i.e., the DMRS configuration type in the reference signal configuration is Type 1, the maximum length is 1, and the network device is configured with an enhanced DMRS type) as an example, the antenna port indication tables corresponding to different numbers of transmission layers are introduced in detail.

[0336] (1) The DCI indicates that the number of transmission layers is 1. In this case, the antenna port indication table may include the content shown in the following Table 24:

[0337] Table 24

[0338] value number of DMRS CDM group(s)without data DMRS port(s) 0 1 0 1 1 1 2 2 0 3 2 1 4 2 2 5 2 3 6 1 8 7 1 9 8 2 8 9 2 9 10 2 10 11 2 11 12-15 reserved reserved

[0339] (2) The DCI indicates that the number of transmission layers is 2. In this case, the antenna port indication table may include the content shown in the following Table 25:

[0340] Table 25

[0341] value number of DMRS CDM group(s)without data DMRS port(s) 0 1 0,1 1 2 0,1 2 2 2,3 3 2 0,2 4 1 8,9 5 2 8,9 6 2 10,11 7 2 9,11

[0342] (3) The DCI indicates that the number of transmission layers is 3. In this case, the antenna port indication table may include the content shown in the following Table 26:

[0343] Table 26

[0344] value number of DMRS CDM group(s)without data DMRS port(s) 0 2 0-2 1 1 0,1,8 2 2 0,1,8 3 2 2,3,10 4-7 reserved reserved

[0345] (4) The DCI indicates that the number of transmission layers is 4. In this case, the antenna port indication table may include the content shown in Table 27 below:

[0346] Table 27

[0347] value number of DMRS CDM group(s)without data DMRS port(s) 0 2 0-3 1 1 0,1,8,9 2 2 0,1,8,9 3 2 2,3,10 4 2 2,3,10,11 5-7 reserved reserved

[0348] (5) The DCI indicates that the number of transmission layers is 5. In this case, the antenna port indication table may include the content shown in the following Table 28:

[0349] Table 28

[0350] value number of DMRS CDM group(s)without data DMRS port(s) 0 2 0,1,2,3,8 1 reserved reserved

[0351] (6) The DCI indicates that the number of transmission layers is 6. In this case, the antenna port indication table may include the content shown in the following Table 29:

[0352] Table 29

[0353] value number of DMRS CDM group(s)without data DMRS port(s) 0 2 0,1,2,3,8,10 1 reserved reserved

[0354] (7) The DCI indicates that the number of transmission layers is 7. In this case, the antenna port indication table may include the content shown in the following Table 30:

[0355] Table 30

[0356] value number of DMRS CDM group(s)without data DMRS port(s) 0 2 0,1,2,3,8,9,10 1 reserved reserved

[0357] (8) The DCI indicates that the number of transmission layers is 8. At this time, the antenna port indication table may include the content shown in the following Table 31:

[0358] Table 31

[0359] value number of DMRS CDM group(s)without data DMRS port(s) 0 2 0,1,2,3,8,9,10,11 1 reserved reserved

[0360] The implementation of each parameter in the above Table 24-Table 31 can refer to the relevant description of the above representation 20, which will not be repeated here.

[0361] The above example illustrates the antenna port indication table corresponding to different ranks in Table 20. In fact, Tables 21 to 23 can also determine different antenna port indication tables according to different ranks. For details, please refer to the relevant descriptions of Tables 24 to 31 above, which will not be repeated here.

[0362] In the above antenna port indication table (i.e., Table 20-Table 31), port x may refer to port x in PUSCH transmission, and may indicate port (1000+x) in PDSCH transmission, where x is an integer. In the embodiment of the present application, whether in PUSCH transmission or PDSCH transmission, x is understood as the index of the port, for example, the index of port 1000 is 0, and the index of port 1001 is 1.

[0363] The first step in the DMRS port notification method is described above. The second step in the DMRS port notification method is introduced below.

[0364] Second, DCI signaling dynamically notifies the allocated DMRS port index.

[0365] Based on the above description, it can be known that in PDSCH transmission, the terminal device can determine an antenna port indication table (such as antenna port indication table #1) according to the reference model configuration, or the reference model configuration and the number of transmission layers; 1 wherein, in PDSCH transmission, the terminal device can determine the antenna port indication table #1 according to the reference model configuration, and in PUSCH transmission, the terminal device can determine the antenna port indication table #1 according to the reference model configuration and the number of transmission layers; at this time, the DCI signaling can indicate a row in the antenna port indication table #1, that is, the DCI signaling is used to indicate a group of port groups from the antenna port indication table #1.

[0366] The network device can send indication information to the terminal device via DCI, and the indication information is used to indicate the DMRS port assigned by the network device to the terminal device, so that the terminal device can determine the DMRS port and then determine the mapping parameters corresponding to the DMRS port. In fact, the DMRS port refers to one or more antenna ports, or in other words, the network device assigns a group of DMRS ports (or a port group) to the terminal device. The group of DMRS ports is the DMRS port(s) corresponding to any row in the antenna port indication table.

[0367] Optionally, the indication information may be located in the antenna port (antenna port(s)) field in the DCI. Exemplarily, the indication information may be any value in "vaule" in the antenna port indication table, that is, the network device may indicate the DMRS port(s) corresponding to the value by indicating the value of "vaule". At this time, the DMRSport(s) corresponding to the value is a group of DMRS ports allocated by the network device to the terminal device.

[0368] Exemplarily, "vaule" can be called an index, that is, the network device can indicate the DMRS port(s) corresponding to the index by indicating the index. Taking the above Table 20 as an example, when the indication information in the antenna port field is index #2, it means that the DMRS port(s) includes port 0 and port 1. Furthermore, the indication information can also indicate the number of DMRS CDM groups without data. Taking the above Table 20 as an example, when the indication information in the antenna port(s) is index #2, the number of DMRS CDM groups without data is 1. And the DMRS CDM group without data is CDM group 0.

[0369] In the same antenna port indication table, a port index (i.e., a row in the antenna port indication table) can only be indicated to one terminal device at the same scheduling time. Multiple port indexes (i.e., multiple rows in the antenna port indication table) can be indicated to different terminal devices at the same scheduling time. Among them, the scenario of indicating different port indexes to multiple terminal devices at the same scheduling time can be understood as multiple terminal devices transmitting PDSCH in the same time unit, that is, multi-user (MU)-multiple input multiple output (MIMO) space division multiplexing is performed between multiple terminal devices.

[0370] Taking PDSCH as an example, according to any of the antenna port indication tables in Tables 20-23 above, it can be seen that in the dual codeword mapping mode (i.e., the number of transmission layers is greater than 4), in any group of port groups, the number of DMRS ports defined by R15 is much larger than the number of DMRS ports newly defined by R18. Therefore, in MU-MIMO technology, if multiple terminal devices support different protocol versions, taking two terminal devices as an example, terminal device #1 supports the R15 protocol, i.e., terminal device #1 only supports the transmission of PDSCH on the DMRS port defined by R15, and terminal device #2 supports the R18 protocol, i.e., terminal device #2 supports the transmission of PDSCH or PUSCH on the DMRS port defined by R15 and the DMRS port newly defined by R18.

[0371] Therefore, if the network device indicates any port group under the dual codeword mapping mode to terminal device #2, the number of DMRS ports that can be used for terminal device #2 is small, or even there is no DMRS port that can be used for terminal device #2.

[0372] Exemplarily, taking Table 20 as an example, under the parameter configuration corresponding to Table 20, the maximum number of transmission layers supported by the protocol is 8. That is to say, terminal device #1 and terminal device #2 can transmit PDSCH or PUSCH on a total of 8 DMRS ports. However, if the port group indicated by the network device for terminal device #2 is any one of index #1 to index #3 under the dual codeword mapping mode, since terminal device #1 only supports PDSCH transmission on the DMRS port defined in R15, and at this time, the DMRS ports defined in R15 have all been configured for terminal device #2, the network device cannot configure a suitable DMRS port for terminal device #1.

[0373] Or, taking Table 21 as an example, due to the parameter configuration corresponding to Table 21, the maximum number of transmission layers supported by the protocol is 16. That is to say, terminal device #1 and terminal device #2 can transmit PDSCH or PUSCH on a total of 16 DMRS ports. Among them, the DMRS ports defined by the R15 protocol include DMRS ports 0 to 7, and the DMRS ports newly defined by the R18 protocol include DMRS ports 8 to 15. If the port group indicated by the network device for terminal device #2 is index #0 under the dual codeword mapping method, at this time, the DMRS port that the network device can configure for terminal device #1 is at least one of DMRS ports 4 to 7. That is to say, at this time, the maximum number of transmission layers that terminal device #1 can use for PDSCH or PUSCH is 4. This reduces the actual throughput of terminal device #1. At the same time, in the above case, DMRS ports 8 to 15 are idle. This causes a waste of DMRS ports.

[0374] Therefore, in the MU-MIMO technology, when multiple terminal devices support different protocol versions, how to reasonably configure antenna ports for the multiple terminals is an urgent problem to be solved.

[0375] Under the same reference signal configuration (such as the same DMRS configuration type and the same number of OFDM symbols occupied by DMRS in the time domain), the DMRS port index defined by the R15 protocol is less than half of the number of antenna ports supported in this case; the index of the newly defined port in the R18 protocol is greater than half of the number of antenna ports supported in this case.

[0376] Exemplarily, when the DMRS configuration type is Type 1 and is a single symbol, the indexes of the DMRS ports supported by the R18 protocol are 0-3 and 8-11. That is, the number of antenna ports supported by the R18 protocol is 8. At this time, the indexes of the DMRS ports defined in the R15 protocol (or, also referred to as legacy ports) are all less than 4, and the indexes of the DMRS ports newly defined in the R18 protocol (or, also referred to as enhanced ports) are all greater than or equal to 4. For example, DMRS ports 0-3 are DMRS ports defined in the R15 protocol (i.e., legacy ports), and DMRS ports 8-11 are DMRS ports newly defined in the R18 protocol (i.e., enhanced ports).

[0377] When the DMRS configuration type is Type 1 and is double-symbol, the port indexes of the DMRS ports supported by the R18 protocol are 0-15. That is, the number of antenna ports supported by the R18 protocol is 16. At this time, the indexes of the DMRS ports defined in the R15 protocol are all less than 8, and the indexes of the DMRS ports newly defined in the R18 protocol are all greater than or equal to 8. For example, DMRS ports 0-7 are DMRS ports defined in the R15 protocol (i.e., traditional ports). DMRS ports 8-15 are DMRS ports newly defined in the R18 protocol (i.e., enhanced ports).

[0378] When the DMRS configuration type is Type 2 and is a single symbol, the port indexes of the DMRS ports supported by the R18 protocol are 0-5 and 12-17. That is, the number of antenna ports supported by the R18 protocol is 12. At this time, the indexes of the DMRS ports defined in the R15 protocol are all less than 6, and the indexes of the DMRS ports newly defined in the R18 protocol are all greater than or equal to 6. For example, DMRS ports 0-5 are DMRS ports defined in the R15 protocol (i.e., traditional ports). DMRS ports 12-17 are DMRS ports newly defined in the R18 protocol (i.e., enhanced ports).

[0379] When the DMRS configuration type is Type 2 and is double-symbol, the port indexes of the DMRS ports supported by the R18 protocol are 0-23. That is, the number of antenna ports supported by the R18 protocol is 24. At this time, the indexes of the DMRS ports defined in the R15 protocol are all less than 12, and the indexes of the ports newly defined in the R18 protocol are all greater than or equal to 12. For example, DMRS ports 0-11 are ports defined in the R15 protocol (i.e., traditional ports). DMRS ports 12-23 are ports newly defined in the R18 protocol (i.e., enhanced ports).

[0380] Based on this, the present application provides a communication method, providing enhanced antenna port information, in which the number of traditional ports in the port group indicated by the antenna port information is less than the number of enhanced ports, so that the network device can allocate the port group indicated by the antenna port information to the terminal device supporting the R18 protocol, compared with the scheme in which the network device allocates the port group to the terminal device supporting the R18 protocol from any of the antenna port indication tables in Tables 22-31 above, the number of remaining traditional ports is large, and the number of ports that can be allocated to the traditional terminal device (terminal device that only supports traditional ports) is large, thereby increasing the actual throughput of the traditional terminal device. Then, the rationality of the antenna port configuration is achieved when multiple terminal devices support different protocol versions.

[0381] The technical solution provided in the present application can be used in various communication systems, and the communication system can be a third generation partnership project 3GPP communication system, for example, a fourth generation (4G) long term evolution (LTE) system, an evolved LTE system (LTE-Advanced, LTE-A) system, a fifth generation (5G) NR system, a vehicle to everything (V2X) system, a system of hybrid networking of LTE and NR, or a device to device (D2D) system, a machine to machine (M2M) communication system, an Internet of Things (IoT), and other next generation communication systems, such as a sixth generation (6G) communication system, etc. Alternatively, the communication system may also be a non-3GPP communication system, without limitation.

[0382] Among them, the above-mentioned communication system applicable to the present application is only an example, and the communication system applicable to the present application is not limited to this. It is uniformly explained here and will not be repeated below.

[0383] See also Figure 3 , is an exemplary communication system provided by the present application. The communication system includes at least one network device and at least one terminal device. Optionally, MU-MIMO space division multiplexing can be performed between multiple terminal devices.

[0384] Optionally, multiple terminal devices support different protocol versions. For example, Figure 4As shown, taking multiple terminal devices including terminal device #1 and terminal device #2 as an example, terminal device #1 can support version R15, that is, terminal device #1 can transmit PDSCH or PUSCH on the DMRS port (or, can be called a traditional port) defined in the R15 protocol. Terminal device #2 can support version R18, that is, terminal device #1 can transmit PDSCH or PUSCH on the DMRS port (or, can be called an enhanced port) newly defined in the R18 protocol and the traditional port. Alternatively, terminal device #1 can support version R18, and terminal device #2 can support version R15.

[0385] Optionally, information transmission between network devices and terminal devices can be achieved through transmission media such as radio waves, visible light, laser, infrared light, optical fiber, etc.

[0386] Optionally, the network device in the embodiment of the present application is a device that connects a terminal device to a wireless network. The network device may be a node in a wireless access network, which may also be referred to as a base station, or a radio access network (RAN) node (or device).

[0387] For example, the network device may include an evolved NodeB (eNB or e-NodeB) in an LTE system or an LTE-A system, such as a traditional macro eNB and a micro eNB in ​​a heterogeneous network scenario. Alternatively, it may include a next generation node B (gNB) of wideband code division multiple access (WCDMA). Alternatively, it may include a transmission reception point (TRP), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a base band unit (BBU), a base band pool (BBU pool), a base transceiver station (BTS) in a global system for mobile communication (GSM) or code division multiple access (CDMA) network, or a wireless fidelity (WiFi) access point (AP), etc. Alternatively, it may include a base station in NTN, that is, it may be deployed on a high-altitude platform or satellite. In NTN, the network device may be used as a layer 1 (L1) relay, or as a base station, or as a DU, or as an integrated access and backhaul (IAB) node. Alternatively, the network device may be a device that implements the base station function in IoT, such as a device that implements the base station function in V2X, D2D, or machine to machine (machine to machine, M2M), or it may include a vehicle-mounted device or a wearable device, or it may include a network device in a 5G network or a public land mobile network (PLMN) that evolves after 5G, and the embodiments of the present application are not limited thereto.

[0388] Optionally, the base station in the embodiments of the present application may include various forms of base stations, such as: macro base stations, micro base stations (also called small stations), relay stations, access points, home base stations, TRPs, transmitting points (TP), mobile switching centers, etc., and the embodiments of the present application do not specifically limit this.

[0389] Optionally, the terminal device in the embodiment of the present application may be a user-side device for implementing a wireless communication function, such as a terminal or a chip that can be used in a terminal, etc. The terminal may be a user equipment (UE), an access terminal, a terminal unit, a terminal station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a wireless communication device, a terminal agent or a terminal device, etc. in a 5G network or a PLMN evolved after 5G. The access terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a smart phone, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device or a wearable device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a wireless data card, a tablet computer, a wireless modem, a handheld device (handset), a laptop computer, a machine type communication (MTC) terminal, etc. Alternatively, the terminal may be a terminal with communication function in IoT, such as a terminal in V2X (eg, a vehicle networking device), a terminal in D2D communication, or a terminal in M2M communication, etc. The terminal may be mobile or fixed.

[0390] Below in conjunction with accompanying drawing, the communication method that embodiment of the present application provides is described.It is understandable that, in embodiment of the present application, network equipment or terminal equipment can perform part or all of the steps in embodiment of the present application, and these steps or operations are only examples, and embodiment of the present application can also perform other operations or the deformation of various operations.In addition, each step can be performed in the different order presented in embodiment of the present application, and it is possible not to perform all the operations in embodiment of the present application.

[0391] like Figure 5 As shown, a communication method provided in an embodiment of the present application includes the following steps:

[0392] S501: A network device sends first indication information to a first terminal device. Correspondingly, the first terminal device receives the first indication information from the network device.

[0393] The first indication information indicates a first antenna port indication table, and the first antenna port indication table includes X groups of first antenna port information, where X is a positive integer.

[0394] Among them, the first antenna port information can indicate an antenna port. The first port group indicated by the first antenna port information includes at least one first port and at least one second port, and the number of ports of at least one first port is greater than the number of ports of at least one second port. At least one first port is located in the first port set, at least one second port is located in the second port set, and the index of any port in the first port set is greater than the index of any port in the second port set. The maximum port index in the second port set is less than half of the number of antenna ports supported under the reference signal configuration corresponding to the first antenna port indication table.

[0395] Optionally, the first terminal device is a terminal device supporting version R18 in MU-MIMO technology.

[0396] Exemplarily, the reference signal configuration corresponding to the first antenna port indication table can be understood as: a reference signal configuration used to determine the first antenna port indication table. In other words, the first antenna port indication table can be determined based on the reference signal configuration.

[0397] Exemplarily, the first indication information indicates a first antenna port indication table, which can also be understood as:

[0398] The first indication information corresponds to the first antenna port indication table. That is, the first antenna port indication table can be determined based on the first indication information.

[0399] Optionally, the first indication information includes a reference signal configuration, and the reference signal configuration is associated with the first line port indication table.

[0400] Exemplarily, the reference signal configuration is associated with the first antenna port indicator table, which can be understood as: the reference signal configuration is used to determine the first antenna port indicator table. In PDSCH transmission, the terminal device can determine the first antenna port indicator table according to the reference signal configuration; in PUSCH transmission, the terminal device can determine the first antenna port indicator table according to the reference signal configuration and the first transmission layer number.

[0401] As an example, in PDSCH transmission, after the terminal device receives the first indication information, it can determine the first antenna port indication table according to the reference signal configuration included in the first indication information.

[0402] In PUSCH transmission, after receiving the first indication information, the terminal device can determine the first antenna port indication table according to the reference signal configuration included in the first indication information.

[0403] As another example, in PUSCH transmission, the communication method further includes: the network device sends third indication information to the terminal device. Correspondingly, the terminal device receives the third indication information from the network device. The third indication information indicates the first number of transmission layers. The first number of transmission layers is the number of transmission layers that the first terminal device can support. Exemplarily, the third indication information can be carried in DCI signaling. For example, the third indication information can be located in the precoding information and number of layers field in the DCI.

[0404] Optionally, in this example, the terminal device determines the first antenna port indication table based on the indication information and the third indication information, so that the network device can indicate the first group of antenna port information for the terminal device from the first antenna port indication table.

[0405] Optionally, the network device obtains the first transmission layer number based on the report from the terminal device, and sends the third indication information to the terminal device. That is, the first transmission layer number is reported by the terminal device to the network device.

[0406] Optionally, the reference signal configuration may include a first configuration type, a first length, and first enhancement information. The first configuration type is the configuration type of the reference signal corresponding to the first antenna port indication table, the first length is the maximum length of the reference signal corresponding to the first antenna port indication table in the time domain, and the first enhancement information indicates that the first configuration type is an enhanced type.

[0407] Exemplarily, the first enhancement information indicates that the first configuration type is an enhanced type, which can also be understood as: an enhanced reference signal (such as a demodulation reference signal DMRS) is turned on.

[0408] Exemplarily, the first configuration type may include Type 1 or Type 2. The value of the first length may be 1 or 2. Since the first enhancement information indicates that the first configuration type is an enhanced type, the reference signal configuration may correspond to any one of the four scenarios under the R18 protocol (i.e., the four different scenarios shown in Table 14 and Table 15 above).

[0409] Exemplarily, the number of antenna ports supported under the reference signal configuration corresponding to the first antenna port indication table can be understood as: the number of antenna ports corresponding to the reference signal configuration. That is, in the R18 protocol, in the scenario of the first configuration type and the first length, the number of antenna ports supported by the protocol. For example, in the R18 protocol, when the first configuration type is Type 1 and the first length is 1 (ie, dmrs-Type=1, maxLength=1, or the DMRS configuration type is Type 1 and a single symbol), the number of antenna ports corresponding to the reference signal configuration is 8. When the first configuration type is Type 1 and the first length is 2 (ie, dmrs-Type=1, maxLength=2, or the DMRS configuration type is Type 1 and a double symbol), the number of antenna ports corresponding to the reference signal configuration is 16. When the first configuration type is Type 2 and the first length is 1 (ie, dmrs-Type=2, maxLength=1, or the DMRS configuration type is Type 2 and a single symbol), the number of antenna ports corresponding to the reference signal configuration is 12. When the first configuration type is Type 2 and the first length is 2 (ie, dmrs-Type=2, maxLength=2, or the DMRS configuration type is Type 2 and is a double symbol), the number of antenna ports corresponding to the reference signal configuration is 24.

[0410] For the convenience of description, in the following embodiments of the present application, the first configuration type is Type 1, the first length is 1, and the first enhancement information indicates that the first configuration type is an enhanced type, which is referred to as reference signal configuration #1; the first configuration type is Type 1, the first length is 2, and the first enhancement information indicates that the first configuration type is an enhanced type, which is referred to as reference signal configuration #2; the first configuration type is Type 2, the first length is 1, and the first enhancement information indicates that the first configuration type is an enhanced type, which is referred to as reference signal configuration #3; the first configuration type is Type 2, the first length is 2, and the first enhancement information indicates that the first configuration type is an enhanced type, which is referred to as reference signal configuration #4.

[0411] Optionally, in addition to the antenna port, the first antenna port information is also used to indicate one or more of the following: an index of the first antenna port information, the number of reference signal CDM groups without data, and the number of preamble symbols.

[0412] Exemplarily, a set of antenna port information can be understood as: information of a row in the first antenna port indication table, the row information may include an index (or may be referred to as a value, an index value, etc.), the number of reference signal CDM groups without data, a port group (or may be referred to as an antenna port), the number of preamble symbols, and other parameters. Specifically, any row of information in any of the above-mentioned Tables 20-31 may be referred to, and no further description is given here.

[0413] Therefore, a group of first antenna port information can be understood as: any row in the X rows of information (i.e., X groups of first antenna port information) in the first antenna port indication table having the characteristic that the number of ports of at least one first port is greater than the number of ports of at least one second port.

[0414] Optionally, the first indication information may be carried in RRC signaling or media access control (MAC) control element (MAC control element, MAC CE) signaling or DCI signaling.

[0415] Exemplarily, taking the first indication information as being carried in RRC signaling, for example, the first indication information may be carried in DMRS-DownlinkConfig signaling. The network device may send the DMRS-DownlinkConfig signaling to the first terminal device at one time, thereby reducing the complexity of the system.

[0416] S502: The network device sends second indication information to the first terminal device. Correspondingly, the first terminal device receives the second indication information from the network device. The second indication information indicates a first group of antenna port information, and the first antenna port information table includes the first group of antenna port information.

[0417] Exemplarily, the first group of antenna port information may be any group of first antenna port information among the X groups of first antenna port information.

[0418] Optionally, the second indication information may be carried in DCI. For example, the second indication information may be located in the Antenna Port(s) field in the DCI. Exemplarily, the format of the DCI carrying the second indication information may be DCI format 1_1 or DCI format 1_0.

[0419] Exemplarily, the third indication information and the second indication information may be located in the same downlink control information DCI signaling.

[0420] Optionally, the second indication information may include a first index, where the first index is the value of an index (or value) in the first group of antenna port information. That is, the second indication information may indicate the first group of antenna port information through the first index.

[0421] Optionally, after step S502, Figure 6 As shown, the communication method may further include step S503:

[0422] S503. The first terminal device communicates according to the port group indicated by the first group of antenna port information.

[0423] In the communication method provided by the present application, the first terminal device can determine the first group of antenna port information from the first antenna port indication table including the first antenna port information of the X group according to the second indication information. Among them, since the index of any port in the first port set is greater than the index of any port in the second port set, the maximum port index in the second port set is less than half of the number of antenna ports supported under the reference signal configuration corresponding to the first antenna port indication table, therefore, the ports in the second port set can be understood as ports in the traditional protocol or traditional ports, and the first port set can be understood as a port set enhanced on the basis of the traditional port. In addition, the first port group includes at least one first port and at least one second port, and the number of ports of at least one first port is greater than the number of ports of at least one second port, indicating that in the port group indicated by the first antenna port information, the number of enhanced ports is greater than the number of traditional ports. At this time, compared with the solution in which the network device indicates the reference signal port for the first terminal device from the existing protocol, the number of enhanced ports in the reference signal port configured by the network device for the first terminal device is larger, and the number of traditional ports is smaller. At this time, the number of remaining traditional ports is larger, so the number of ports that can be allocated to traditional terminal devices (terminal devices that only support traditional ports) is larger, thereby increasing the actual throughput of traditional terminal devices. In this way, the rationality of antenna port configuration is achieved when multiple terminal devices support different protocol versions.

[0424] The above is an overall description of the communication method of the present application. The first port and the second port mentioned in the above embodiment are described in detail below. For example, the "antenna port" mentioned in the embodiment of the present application may also be referred to as an orthogonal antenna port, a DMRS port, or a port, or other names may exist without limitation.

[0425] Optionally, the four-long frequency domain mask sequences corresponding to each antenna port in at least one first port and at least one second port are orthogonal. The four-long frequency domain mask sequences include the frequency domain masks corresponding to 4 consecutive subcarriers in a CDM group, and the adjacent frequency domain mask symbols in the four-long frequency domain mask sequences corresponding to the second port are orthogonal. Since each port in at least one first port and at least one second port corresponds to a four-long frequency domain mask sequence, the first port and the second port are both ports supported under the R18 protocol. That is to say, at least one first port and at least one second port can be part or all of the antenna ports supported under the R18 protocol.

[0426] Exemplarily, the frequency domain mask sequence of at least one second port includes {+1, +1, +1, +1} and / or {+1, -1, +1, -1}. The frequency domain mask sequence of at least one first port includes {+1, +1, -1, -1} and / or {+1, -1, -1, +1}. Since the frequency domain mask sequence of the second port is {+1, +1, +1, +1} or {+1, -1, +1, -1}, the second port is considered to be an antenna port defined by the R15 protocol (or, it can be called a traditional port). Since the frequency domain mask sequence of the first port is {+1, +1, -1, -1} or {+1, -1, -1, +1}, the first port is considered to be an antenna port defined by the R18 protocol (or, it can be called a traditional port).

[0427] Exemplarily, the index of any port in the first port set is greater than the index of any port in the second port set, and the maximum port index in the second port set is less than half of the number of antenna ports supported under the reference signal configuration corresponding to the first antenna port indication table. It can be understood that: the first port set may include antenna ports whose port index is greater than or equal to the first port index among the antenna ports corresponding to the reference signal configuration. The second port set may include antenna ports whose port index is less than the first port index among the antenna ports corresponding to the reference signal configuration. The value of the first port index is half of the number of antenna ports corresponding to the reference signal configuration.

[0428] See also Figure 7 , are the antenna ports supported under the reference signal configuration (i.e., reference signal configuration #1 to reference signal configuration #4), the CDM group to which the antenna ports belong, and the FD-OCC sequence corresponding to the antenna ports. Figure 7As shown, the number of antenna ports corresponding to reference signal configuration #1 is 8, and the indexes of the 8 antenna ports are 0-3 and 8-11. Therefore, the first port set may include at least one of the antenna ports indexed from 8 to 11. The second port set may include at least one of the antenna ports indexed from 0 to 3. The number of antenna ports corresponding to reference signal configuration #2 is 16, and the port indexes of the 8 antenna ports are 0-15. Therefore, the first port set may include at least one of the antenna ports indexed from 8 to 15. The second port set may include at least one of the antenna ports indexed from 0 to 7. The number of antenna ports corresponding to reference signal configuration #3 is 12, and the port indexes of the 12 antenna ports are 0-5 and 12-17. Therefore, the first port set may include at least one of the antenna ports indexed from 12 to 17. The second port set may include at least one of the antenna ports indexed from 0 to 5. The number of antenna ports corresponding to reference signal configuration #4 is 24, and the port indexes of the 24 antenna ports are 0-23. Thus, the first port set may include at least one of the antenna ports indexed from 12 to 23. The second port set may include at least one of the antenna ports indexed from 0 to 11.

[0429] As a first example, the number of ports in the first port set may be equal to the number of ports in the second port set.

[0430] Exemplarily, taking reference signal configuration #1 as an example, the first port set may include 15 implementation forms: first port set #1{8}, first port set #2{9}, first port set #3{10}, first port set #4{11}, first port set #5{8, 9}, first port set #6{8, 11}, first port set #7{9, 11}, first port set #8{10, 11}, first port set #9{9, 10}, first port set #10{8, ​​10}, first port set #11{8, 9, 10}, first port set #12{8, 9, 10, 11}, first port set #13{8, 9, 11}, first port set #14{8, 10, 11}, first port set #15{9, 10, 11}.

[0431] The second port set may also include 15 implementation forms: second port set #1 {0}, second port set #2 {1}, second port set #3 {2}, second port set #4 {3}, second port set #5 {0, 1}, second port set #6 {0, 3}, second port set #7 {1, 3}, second port set #8 {2, 3}, second port set #9 {1, 2}, second port set #10 {0, 2}, second port set #11 {0, 1, 2}, second port set #12 {0, 1, 2, 3}, second port set #13 {0, 1, 3}, second port set #14 {0, 2, 3}, second port set #15 {1, 2, 3}.

[0432] When the number of ports in the first port set is 4 (in this case, the first port set is the first port set #12 {8, 9, 10, 11}), the second port set may be the second port set #12 {0, 1, 2, 3}; when the number of ports in the first port set is 3 (in this case, the first port set may be any one of the first port set #11 {8, 9, 10}, the first port set #13 {8, 9, 11}, the first port set #14 {8, 10, 11}, and the first port set #15 {9, 10, 11}), the second port set may be any one of the second port set #11 {0, 1, 2}, the second port set #13 {0, 1, 3}, the second port set #14 {0, 2, 3}, and the second port set #15 {1, 2, 3}.

[0433] Exemplarily, each parameter in the first port set and the second port set is a port index of an antenna port. The antenna port is indicated by the port index. Taking the first port set #1{8} as an example, at this time, the first port set #1 includes an antenna port with a port index of 8. The above is only an example of the possible implementation forms of the first port set and the second port set when the number of ports in the first port set and the number of ports in the second port set are 3 or 4, taking the reference signal configuration #1 as an example. The cases of reference signal configuration #2, reference signal configuration #3, and reference signal configuration #4, as well as the possible implementation forms of the first port set and the second port set in the above cases, can all refer to the relevant description of the reference signal configuration #1 above, and will not be repeated here.

[0434] As a second example, the port index in the second port set is greater than 0. That is, the port index of the second port is greater than 0.

[0435] Exemplarily, taking reference signal configuration #1 as an example, the second port set may include 7 implementation forms: second port set #1{1}, second port set #2{2}, second port set #3{3}, second port set #4{1,3}, second port set #5{2,3}, second port set #6{1,2}, second port set #7{1,2,3}.

[0436] At this time, the implementation of the first port set may refer to the relevant description of the first port set in the first example above, which will not be repeated here.

[0437] The above is a description of the first port set and the second port set. The first antenna port indication table mentioned in the above embodiment is described in detail below. Optionally, the first antenna port indication table includes X groups of first antenna port information. Exemplarily, the X groups of first antenna port information may include the following three possible implementation forms:

[0438] In a first possible implementation form, at least one first port and at least one second port belong to the same CDM group, that is, antenna ports in the first port group all belong to the same CDM.

[0439] Optionally, in this possible implementation, the difference between the number of ports of at least one first port and the number of at least one second port is a first numerical value, the first numerical value is in a first numerical value set, the minimum numerical value in the first numerical value set is greater than or equal to 1, the maximum numerical value in the first numerical value set is less than one half of the number of antenna ports included in the first CDM group, the first CDM group is any one of multiple CDM groups under the reference signal configuration corresponding to the first antenna port indication table, and each numerical value in the first numerical value set is a positive integer.

[0440] Optionally, the CDM group under the reference signal configuration corresponding to the first antenna port indication table can be understood as: a group of CDM groups defined by the protocol under the scenario indicated by the reference signal configuration (i.e., the scenario corresponding to the first configuration type, the first length and the first enhancement information).

[0441] For example, Figure 7 As shown by Figure 7It can be seen that when the reference signal configuration is reference signal configuration #1 or reference signal configuration #3, one CDM group includes 4 antenna ports. Therefore, when the reference signal configuration is reference signal configuration #1 or reference signal configuration #3, or, the first value set can be {1}. When the reference signal configuration is reference signal configuration #2 or reference signal configuration #4, one CDM group includes 8 antenna ports. When the reference signal configuration is reference signal configuration #2 or reference signal configuration #4, the first value set can include any one of the following multiple items: {1}, {2}, {3}, {1, 2}, {1, 3}, {2, 3}, {1, 2, 3}. For example, when the first value set is {1, 2, 3}, the first value can be any one of 1, 2, and 3.

[0442] Exemplarily, when the reference signal configuration is reference signal configuration #1, the first value is 1. The first port group may include two first ports and one second port. Exemplarily, the first port group may include any one of the following: {1, 8, 9}, {2, 10, 11}, {3, 10, 11}.

[0443] Therefore, when the reference signal configuration is reference signal configuration #1, the X group of first antenna port information may include content shown in at least one row in the following Table 32, where a row of information in Table 32 may be represented as a group of first antenna port information:

[0444] Table 32

[0445] value number of DMRS CDM group(s)without data DMRS port(s) 0 1 1，8，9 1 1 2，10，11 2 1 3，10，11

[0446] The above table 32 is only an exemplary description of a possible implementation form of the first antenna port information of the X group. In this case, the first antenna port indication table may include at least one group of first antenna port information in the above table 32. Further, the first antenna port indication table may be a combination of at least one group of antenna port information in Table 20 and at least one group of first antenna port information in Table 32. For example, any 3 rows of information in Table 32 are combined with 3 rows of information in Table 32 as the first antenna port information. Among them, the value of "value" in Table 32 is only used to distinguish different port groups (i.e., DMRS port(s)) in Table 32, and does not mean that the correspondence between each port group and "value" can only be as shown in the above table 32. In fact, DMRS port(s) {1, 8, 9} can also correspond to other "values". For example, the "value" corresponding to DMRS port(s) {1, 8, 9} can be 3. As long as different port groups can be distinguished, there is no limitation.

[0447] It should be noted that the "port group" described in the embodiments of the present application only indicates the antenna port indicated by the port index in the port group, and does not indicate the order of each antenna port included in the port group. For example, the port group {1, 8, 9} indicates that the port group includes antenna ports with port indexes of 1, 8, and 9, respectively, and does not indicate the distribution order of port 1, port 8, and port 9.

[0448] When the reference signal configuration is reference signal configuration #2, if the first value is 1, the first port group may include the following three implementation forms:

[0449] As an example, the port group may include any of the following: {1, 8, 9}, {1, 9, 12}, {1, 8, 12}, {1, 8, 13}, {1, 9, 13}, {4, 8, 9}, {4, 9, 12}, {4, 12, 13}, {4, 8, 12}, {4, 8, 13}, {4, 9, 13}, {5, 8, 9}, {5, 9, 12}, {5, 12, 13}, {5, 8, 12}, {5, 8, 13}, {5, 9, 13}, {2, 10, 11}, {2, 10, 14}, {2, 10, 15}, {2 , 11, 14}, {2, 11, 15}, {2, 14, 15}, {3, 10, 11}, {3, 10, 14}, {3, 10, 15}, {3, 11, 14}, {3, 11, 15}, {3, 14, 15}, {6, 10, 11}, {6, 10, 14}, {6, 10, 15}, {6, 11, 14}, {6, 11, 15}, {6, 14, 15}, {7, 10, 11}, {7, 10, 14}, {7, 10, 15}, {7, 11, 14}, {7, 11, 15}, {7, 14, 15}.

[0450] As another example, the first port group may include three first ports and two second ports. Exemplarily, the first port group may include any one of the following: {1, 4, 8, 9, 12}, {1, 4, 8, 9, 13}, {1, 4, 8, 12, 13}, {1, 4, 9, 12, 13}, {1, 5, 8, 9, 12}, {1, 5, 8, 9, 13}, {1, 5, 8, 12, 13}, {1, 5, 9, 12, 13}, {4, 5 ,8,9,12},{4,5,8,9,13},{4,5,8,12,13},{4,5,9,12,13},{2,3,10,11,14},{2,3,10,11,15},{2,3,10,14,15},{2,3,11,14,15},{2,6,10,11,14},{2,6,10,11,1 5}, {2, 6, 10, 14, 15}, {2, 6, 11, 14, 15}, {2, 7, 10, 11, 14}, {2, 7, 10, 11, 15}, {2, 7, 10, 14, 15}, {2, 7, 11, 14, 15}, {3, 6, 10, 11, 14}, {3, 6, 10, 11, 15}, {3, 6, 10, 14, 15}, {3, 6, 11, 14, 15}, {3, 7, 10, 11, 14}, {3, 7, 10, 11, 15}, {3, 7, 10, 14, 15}, {3, 7, 11, 14, 15}, {6, 7, 10, 11, 14}, {6, 7, 10, 11, 15}, {6, 7, 10, 14, 15}, {6, 7, 11, 14, 15}.

[0451] As another example, the first port group may include four first ports and three second ports. Exemplarily, the first port group may include any one of the following: {1, 4, 5, 8, 9, 12, 13}, {2, 3, 6, 10, 11, 14, 15}, {2, 3, 7, 10, 11, 14, 15}, {3, 6, 7, 10, 11, 14, 15}.

[0452] Optionally, if the first value is 2, the first port group may include the following two implementation forms:

[0453] As an example, the first port group may include three first ports and one second port. Exemplarily, the first port group may include any one of the following: {1, 8, 9, 12}, {1, 8, 9, 13}, {1, 9, 12, 13}, {1, 8, 12, 13}, {4, 8, 9, 12}, {4, 8, 9, 13}, {4, 9, 12, 13}, {4, 8, 12, 13}, {5, 8, 9, 12}, {5, 8, 9, 13}, {5, 9, 12, 13}, {5, 8, 12, 13}, {2, 10, 11, 14}, {2, 10, 11, 15} 15}, {2, 10, 14, 15}, {2, 11, 14, 15}, {3, 10, 11, 14}, {3, 10, 11, 15}, {3, 10, 14, 15}, {3, 11, 14, 15}, {6, 10, 11, 14}, {6, 10, 11, 15}, {6, 10, 14, 15}, {6, 11, 14, 15}, {7, 10, 11, 14}, {7, 10, 11, 15}, {7, 10, 14, 15}, {7, 11, 14, 15}.

[0454] As another example, the first port group may include four first ports and two second ports. Exemplarily, the first port group may include any one of the following: {1, 4, 8, 9, 12, 13}, {1, 5, 8, 9, 12, 13}, {4, 5, 8, 9, 12, 13}, {2, 3, 10, 11, 14, 15}, {2, 6, 10, 11, 14, 15}, {2, 7, 10, 11, 14, 15}, {3, 6, 10, 11, 14, 15}, {3, 7, 10, 11, 14, 15}, {6, 7, 10, 11, 14, 15}.

[0455] Optionally, if the first value is 3, the first port group may include four first ports and one second port. Exemplarily, the first port group may include any one of the following: {1, 8, 9, 12, 13}, {4, 8, 9, 12, 13}, {5, 8, 9, 12, 13}, {2, 10, 11, 14, 15}, {3, 10, 11, 14, 15}, {6, 10, 11, 14, 15}, {7, 10, 11, 14, 15}.

[0456] Therefore, when the reference signal configuration is reference signal configuration #2, the first antenna port information of the X group may include the content shown in at least one row of the following Table 33 (such as Table 33A and / or Table 33B). Wherein, when a single codeword mapping mode is adopted (that is, the number of transmission layers (or the number of ports in the port group) is less than or equal to 4 at this time), the first antenna port information of the X group may include the content shown in at least one row of Table 33A:

[0457] Table 33A

[0458]

[0459]

[0460] When a dual codeword mapping method is adopted (that is, the number of transmission layers (or the number of ports in the port group) is greater than 4), the first antenna port information of the X group may include at least one row shown in Table 33B:

[0461] Table 33B

[0462]

[0463]

[0464] The above Tables 33A and 33B are only exemplary descriptions of possible implementation forms of the X group of first antenna port information. At this time, the first antenna port indication table may include at least one group of first antenna port information in the above Table 33. Further, the first antenna port indication table may be a combination of at least one group of antenna port information in Table 21 and at least one group of first antenna port information in Table 33.

[0465] Exemplarily, the first antenna port indication table may include the content shown in Table 34 (such as Table 34A, Table 34B, or Table 34C):

[0466] Table 34A

[0467]

[0468]

[0469] In the above Table 34A, the first antenna port information of the X group includes the antenna port information corresponding to the vaule values ​​of 58, 60, 62, and 64 in the single codeword mapping mode. The antenna port information in Table 34A except the first antenna port information of the X group is the antenna port information in Table 21.

[0470] It should be noted that the above Table 34A only indicates that the first antenna port indication table includes the above 79 groups of antenna port information (i.e., 67 groups of antenna port information under the single codeword mapping mode and 12 groups of antenna port information under the dual codeword mapping mode). It does not mean that the arrangement order of the 79 groups of antenna port information in the first antenna port indication table must be as shown in Table 34A. In fact, the arrangement order of the 79 groups of antenna port information can be swapped. For example, when the vaule value is 58, the DMRS port(s) is indicated to be {5, 12, 13}, and when the vaule value is 60, the DMRS port(s) is indicated to be {1, 8, 9}, which will not be repeated here.

[0471] Table 34B

[0472]

[0473]

[0474] In the above Table 34B, the first antenna port information of the X group includes the antenna port information corresponding to the vaule values ​​of 54-57 in the single codeword mapping mode, and the antenna port information corresponding to the vaule values ​​of 8-10 and 12-14 in the dual codeword mapping mode. The antenna port information in Table 34B except the first antenna port information of the X group is the antenna port information in Table 21. The implementation of the first antenna port indication table indicated in Table 34B is similar to the implementation of the first antenna port indication table indicated in Table 34A above. For details, please refer to the above description of Table 34A, which will not be repeated here.

[0475] Table 34C

[0476]

[0477]

[0478]

[0479] In the above Table 34C, the first antenna port information of the X group includes the antenna port information corresponding to the vaule values ​​of 54, 56, 58, and 60 in the single codeword mapping mode, and the antenna port information corresponding to the vaule values ​​of 8-10, 12-14 in the dual codeword mapping mode. The antenna port information in Table 34C except the first antenna port information of the X group is the antenna port information in Table 21. The implementation of the first antenna port indication table indicated in Table 34C is similar to the implementation of the first antenna port indication table indicated in Table 34A above. For details, please refer to the above description of Table 34A, which will not be repeated here.

[0480] The port group {0, 2, 3} corresponding to the last row in the above Table 34A / 34B / 34C is only valid in multi-TRP transmission or multi-panel transmission mode, that is, it can be understood that for non-multi-TRP or multi-panel transmission mode, the above table contains port combinations corresponding to all rows except the last row of port combinations. The multi-TRP or multi-panel transmission mode is defined as follows: when the first terminal device receives an activation command that maps at least one code point of the DCI field "transmission configuration indication" to two transmission configuration indicator (TCI) states, the first day new port indication table may include all antenna port information in the above Table 34A / 34B / 34C; at this time, the first group of antenna port information may be the antenna port information corresponding to the last row, that is, the first terminal device can send or receive DMRS through port 0, port 2, and port 3.

[0481] When the terminal device receives an activation command that maps at least one code point of the DCI field "transmission configuration indication" to a TCI state, the first day new port indication table may include all antenna port information except the antenna port information corresponding to the last row in the above-mentioned Table 34A / 34B / 34C; at this time, the first group of antenna port information does not include the antenna port information corresponding to the last row, that is, the first terminal device cannot send or receive DMRS through port 0, port 2, and port 3.

[0482] The above is only an exemplary description taking the first antenna port indication table as Table 34 as an example. In fact, when the first antenna port indication table is in a form other than Table 34, as long as the first antenna port indication table includes a set of antenna port information indicating the port group {0, 2, 3}, the above definition of multi-TRP or multi-panel transmission mode is still applicable.

[0483] The above Tables 34A-34C are only exemplary examples of possible implementation forms of the first antenna port indication table when the reference signal configuration is reference signal configuration #2. In fact, the first antenna port indication table may also have other forms besides the above Tables 34A-34C. For example, on the basis of the above Table 34, some antenna port information in Table 33 is added to form the first antenna port indication table, or on the basis of the above Table 34, some antenna port information in Table 21 is added to form the first antenna port indication table, or some contents in Table 34 are deleted to form the first antenna port indication table, etc. I will not repeat them again.

[0484] When the reference signal configuration is reference signal configuration #3, the first value is 1. The first port group may include two first ports and one second port. Exemplarily, the first port group may include any one of the following: {1, 12, 13}, {2, 14, 15}, {3, 14, 15}, {4, 16, 17}, {5, 16, 17}.

[0485] Therefore, when the reference signal configuration is reference signal configuration #3, the X group of first antenna port information may include content shown in at least one row in the following Table 34, where a row of information in Table 35 may be represented as a group of first antenna port information:

[0486] Table 35

[0487] value number of DMRS CDM group(s)without data DMRS port(s) 0 1 1，12，13 1 1 2，14，15 2 1 3，14，15 3 1 4，16，17 4 1 5，16，17 5-7 reserved reserved

[0488] The above table 35 is only an exemplary description of a possible implementation form of the X group of first antenna port information. At this time, the first antenna port indication table may include at least one group of first antenna port information in the above table 35. Further, the first antenna port indication table may be a combination of at least one group of antenna port information in Table 22 and at least one group of first antenna port information in Table 35. The specific implementation is similar to the implementation of the first antenna port indication table in the above table 32, and the relevant description of the above table 32 and the first antenna port indication table may be referred to, and will not be repeated here.

[0489] Depend on Figure 7 It can be seen that when the reference signal configuration is reference signal configuration #4, if the first value is 1, the first port group may include the following three implementation forms:

[0490] As an example, the first port group may include two first ports and one second port. Exemplarily, the port group indicated by the first antenna port information may include any one of the following items: {1, 12, 13}, {1, 12, 18}, {1, 12, 19}, {1, 13, 18}, {1, 13, 19}, {1, 18, 19}, {6, 12, 13}, {6, 12, 18}, {6, 12, 19}, {6, 13, 18}, {6, 13, 19}, {6, 18, 19}, {7, 12, 13}, {7 , 12, 18}, {7, 12, 19}, {7, 13, 18}, {7, 13, 19}, {7, 18, 19}, {2, 14, 15}, {3, 14, 15}, {8, 14, 15}, {9, 14, 15}, {2, 14, 20}, {3, 14, 20}, {8, 14, 20}, {9, 14, 20}, {2, 14, 21}, {3, 14, 21}, {8, 14, 21}, {9, 14, 21}, {2, 15, 20}, {3, 15, 20}, {8, 15, 20}, {9, 15, 20}, {2, 15, 21}, {3, 15, 21}, {8, 15, 21}, {9, 15, 21}, {2, 20, 21}, {3, 20, 21}, {8, 20, 21}, {9, 20, 21}, {4, 16, 22}, {5, 16, 22}, {10, 16, 22}, {11, 16, 22}, {4 , 16, 23}, {5, 16, 23}, {10, 16, 23}, {11, 16, 23}, {4, 17, 22}, {5, 17, 22}, {10, 17, 22}, {11, 17, 22}, {4, 17, 23}, {5, 17, 23}, {10, 17, 23}, {11, 17, 23}, {4, 22, 23}, {5, 22, 23}, {10, 22, 23}, {11, 22, 23}.

[0491] As another example, the first port group may include three first ports and two second ports. Exemplarily, the first port group may include any one of the following: {1, 6, 12, 13, 18}, {1, 6, 12, 13, 19}, {1, 6, 12, 18, 19}, {1, 6, 13, 18, 19}, {1, 7, 12, 13, 18}, {1, 7, 12, 13, 19}, {1, 7, 12, 18, 19}, {1, 7, 12, 13, 18}, {6, 7, 12, 13, 19}, {6, 7, 12, 13, 19}, {6, 7, 12, 18, 19}, {1, 6, 7, 12, 13, 18}, {2, , 3, 14, 15, 20}, {2, 3, 14, 15, 21}, {2, 3, 14, 20, 21}, {2, 3, 14, 20, 21}, {2, 8, 14, 15, 20}, {2, 8, 14, 15, 21}, {2, 8, 14, 20, 21}, {2, 8, 15, 20, 21}, {2, 9, 14, 15, 20}, {2, 9, 14, 15, 21}, {2, 9, 14, 20, 21}, {2, 9, 15, 20, 21}, {3, 8, 14, 15, 20}, {3, 8, 14, 15, 21}, {3, 8, 14, 20, 21}, {3, 8, 15, 20, 21}, {3, 9, 14, 15, 20}, {3, 9, 14, 15, 21}, {3, 9, 14, 20, 21}, {3, 9, 15, 20, 21}, {4, 5, 16, 17, 22}, {4, 5, 16, 17, 23}, {4, 5, 16, 22, 23}, {4, 10, 16, 17, 22}, {4, 10, 16, 17, 23}, {4, 10, 16, 22, 23}, {4, 10, 17, 22, 23}, {4, 11, 16, 17, 22}, {4, 11, 16, 17, 23}, { , 23}, {4, 11, 17, 22, 23}, {5, 10, 16, 17, 22}, {5, 10, 16, 17, 23}, {5, 10, 16, 22, 23}, {5, 10, 17, 22, 23}, {5, 11, 16, 17, 22}, {5, 11, 16, 17, 23}, {5, 11, 16, 22, 23}, {5, 11, 17, 22, 23}, {10, 11, 16, 17, 22}, {10, 11, 16, 17, 23}, {10, 11, 16, 22, 23}, {10, 11, 17, 22, 23}.

[0492] As another example, the first port group may include four first ports and three second ports. Exemplarily, the first port group may include any one of the following: {2, 3, 8, 14, 15, 20, 21}, {2, 3, 9, 14, 15, 20, 21}, {3, 8, 9, 14, 15, 20, 21}, {4, 5, 10, 16, 17, 22, 23}, {4, 5, 11, 16, 17, 22, 23}, {5, 10, 11, 16, 17, 22, 23}.

[0493] Optionally, if the first value is 2, the first port group may include the following two implementation forms:

[0494] As an example, the port group indicated by the first antenna port information may include three first ports and one second port. Exemplarily, the first port group may include any one of the following multiple items: {1, 12, 13, 18}, {1, 12, 13, 19}, {1, 13, 18, 19}, {6, 12, 13, 18}, {6, 12, 13, 19}, {6, 13, 18, 19}, {7, 12, 13, 18}, {7, 12, 13, 19}, {7, 13, 18, 19}, {2, 14, 15, 20}, {2, 14, 15, 21}, {2, 15, 20, 21}, {3, 14, 15, 20}, {3, 14, 15, 21}, {3, 15, 20, 21}, {8, 14, 15, 2 0}, {8, 14, 15, 21}, {8, 15, 20, 21}, {9, 14, 15, 20}, {9, 14, 15, 21}, {9, 15, 20, 21}, {4, 16, 17, 22}, {4, 16, 17, 23}, {4, 17, 22, 23}, {5, 16, 17, 22}, {5, 16, 17, 23}, {5, 17, 22, 23}, {10, 16, 17, 22}, {10, 16, 17, 23}, {10, 17, 22, 23}, {11, 16, 17, 22}, {11, 16, 17, 23}, {11, 17, 22, 23}.

[0495] As another example, the first port group may include four first ports and two second ports. Exemplarily, the first port group may include any one of the following: {1, 6, 12, 13, 18, 19}, {1, 7, 12, 13, 18, 19}, {6, 7, 12, 13, 18, 19}, {2, 3, 14, 15, 20, 21}, {2, 8, 14, 15, 20, 21}, {2, 9, 14, 15, 20, 21}, {3, 8, 14, 15, 20, 21}, {3, 9, 14, 15, 20, 21}, {8, 9, 14, 15, 20, 21}.

[0496] Optionally, if the first value is 3, the first port group may include four first ports and one second port. Exemplarily, the first port group may include any one of the following: {1, 12, 13, 18, 19}, {6, 12, 13, 18, 19}, {7, 12, 13, 18, 19}, {2, 14, 15, 20, 21}, {3, 14, 15, 20, 21}, {8, 14, 15, 20, 21}, {9, 14, 15, 20, 21}, {4, 16, 17, 22, 23}, {5, 16, 17, 22, 23}, {10, 16, 17, 22, 23}, {11, 16, 17, 22, 23}.

[0497] Therefore, when the reference signal configuration is reference signal configuration #4, the first antenna port information of the X group may include the content shown in at least one row of the following Table 36 (such as Table 36A and / or Table 36B). Wherein, when a single codeword mapping mode is adopted (that is, the number of transmission layers (or the number of ports in the port group) is less than or equal to 4 at this time), the first antenna port information of the X group may include the content shown in at least one row of Table 36A:

[0498] Table 36A

[0499]

[0500]

[0501]

[0502] When a dual codeword mapping method is adopted (that is, the number of transmission layers (or the number of ports in the port group) is greater than 4), the first antenna port information of the X group may include at least one row shown in Table 36B:

[0503] Table 36B

[0504]

[0505]

[0506]

[0507] The above Tables 36A and 36B are only exemplary descriptions of possible implementation forms of the X group of first antenna port information. At this time, the first antenna port indication table may include at least one group of first antenna port information in the above Table 36. Further, the first antenna port indication table may be a combination of at least one group of antenna port information in Table 23 and at least one group of first antenna port information in Table 65.

[0508] Exemplarily, the first antenna port indication table may include the content shown in Table 37 (such as Table 37A, Table 37B, Table 37C, or Table 37D):

[0509] Table 37A

[0510]

[0511]

[0512]

[0513]

[0514] In the above Table 37A, the first antenna port information of group X includes antenna port information corresponding to vaule values ​​of 116, 118, 120, 122, 124, and 126. The antenna port information in Table 37A except the first antenna port information of group X is the antenna port information in Table 23.

[0515] It should be noted that the above Table 37A only indicates that the first antenna port indication table includes the above 147 groups of antenna port information (i.e., 129 groups of antenna port information under the single codeword mapping mode and 18 groups of antenna port information under the dual codeword mapping mode). It does not mean that the arrangement order of the 147 groups of antenna port information in the first antenna port indication table must be as shown in Table 37A. In fact, the arrangement order of the 147 groups of antenna port information can be swapped. For example, when the vaule value is 126, it indicates that the DMRS port(s) is {10, 11, 22, 23}, and when the vaule value is 127, it indicates that the DMRS port(s) is {11, 22, 23}, which will not be repeated here.

[0516] Table 37B

[0517]

[0518]

[0519]

[0520]

[0521] In the above Table 37B, the first antenna port information of the X group includes the antenna port information corresponding to the vaule values ​​of 116-121. The antenna port information in Table 37B except the first antenna port information of the X group is the antenna port information in Table 23. The implementation of the first antenna port indication table indicated in Table 37B is similar to the implementation of the first antenna port indication table indicated in Table 37A. For details, please refer to the above description of Table 37A, which will not be repeated here.

[0522] Table 37C

[0523]

[0524]

[0525]

[0526]

[0527] In the above Table 37C, the first antenna port information of the X group includes the antenna port information corresponding to the vaule values ​​of 116-121. The antenna port information in Table 37C except the first antenna port information of the X group is the antenna port information in Table 23. The implementation of the first antenna port indication table indicated by Table 37C is similar to the implementation of the first antenna port indication table indicated by Table 37A. For details, please refer to the above description of Table 37A, which will not be repeated here.

[0528] Table 37D

[0529]

[0530]

[0531]

[0532]

[0533] In the above Table 37D, the first antenna port information of the X group includes antenna port information corresponding to vaule values ​​of 115, 117, 119, 119, 121, 123, and 125. The antenna port information in Table 37D except the first antenna port information of the X group is the antenna port information in Table 23. The implementation of the first antenna port indication table indicated by Table 37D is similar to the implementation of the first antenna port indication table indicated by Table 37A. For details, please refer to the above description of Table 37A, which will not be repeated here.

[0534] The port group {0, 2, 3} corresponding to the last row in the above Table 37A / 37B / 37C / 37D is only effective in multi-TRP transmission or multi-panel transmission mode, that is, it can be understood that for non-multi-TRP or multi-panel transmission mode, the above table contains port combinations corresponding to all rows except the port combination in the last row. The multi-TRP or multi-panel transmission mode is defined as follows: when the first terminal device receives an activation command that maps at least one code point of the DCI field "transmission configuration indication" to two TCI states, the first day new port indication table may include all antenna port information in the above Table 34A / 34B / 34C; at this time, the first group of antenna port information may be the antenna port information corresponding to the last row, that is, the first terminal device can send or receive DMRS through port 0, port 2, and port 3.

[0535] When the terminal device receives an activation command that maps at least one code point of the DCI field "transmission configuration indication" to a TCI state, the first day new port indication table may include all antenna port information except the antenna port information corresponding to the last row in the above-mentioned Table 37A / 37B / 37C / 37D; at this time, the first group of antenna port information does not include the antenna port information corresponding to the last row, that is, the first terminal device cannot send or receive DMRS through port 0, port 2, and port 3.

[0536] The above is only an exemplary description using the first antenna port indication table as Table 37. In fact, when the first antenna port indication table is in a form other than Table 34, as long as the first antenna port indication table includes a set of antenna port information indicating the port group {0, 2, 3}, the above definition of multi-TRP or multi-panel transmission mode is still applicable. Among them, when the first antenna port table is the above Table 37C or Table 37D, the network device can represent the second indication information through 7 bits, that is, the 7 bits can indicate any group of antenna port information in the first antenna port indication table, which can save signaling overhead compared to the solution in which the network device indicates any group of antenna port information from Table 23 (8 bits are required to represent the second indication information).

[0537] The above Tables 37A to 37D are only exemplary examples of possible implementation forms of the first antenna port indication table when the reference signal configuration is reference signal configuration #4. In fact, the first antenna port indication table may also have other forms besides the above Tables 37A to 37D. For example, on the basis of the above Table 37, some antenna port information in Table 36 is added to form the first antenna port indication table, or on the basis of the above Table 37, some antenna port information in Table 23 is added to form the first antenna port indication table, or some contents in Table 37 are deleted to form the first antenna port indication table, etc. It will not be repeated again.

[0538] Optionally, in this optional implementation, if the port group indicated by the first group of antenna port information is the first port group, multiple antenna ports in the port group indicated by the first group of antenna port information belong to the same CDM group.

[0539] Based on this possible implementation method, since the antenna ports in the port group indicated by the first group of antenna port information belong to the same CDM group, that is, the first terminal device can send or receive DMRS on the antenna ports in the same CDM group, there is no need to determine whether the remaining antenna ports (that is, the antenna ports in the same CDM except the antenna ports in the port group indicated by the first group of antenna port information) are occupied by other devices, thereby reducing the complexity of channel estimation and improving the channel estimation capability.

[0540] In a second possible implementation form, at least one first port corresponds to the same TD-OCC sequence as at least one second port. In other words, the TD-OCC sequence of each antenna port in at least one first port and at least one second port is the same.

[0541] Optionally, in this possible implementation, the difference between the number of ports of at least one first port and the number of ports of at least one second port is a second value, the second value is in a second value set, the minimum value in the second value set is greater than or equal to 1, the maximum value in the second value set is less than half of the number of antenna ports corresponding to the first TD-OCC sequence, the first TD-OCC sequence is the TD-OCC sequence corresponding to any antenna port in the antenna port under the reference signal configuration corresponding to the first antenna port indication table, and each value in the second value set is a positive integer.

[0542] Exemplarily, the first TD-OCC sequence may be {+1, +1}, or may also be {+1, -1}.

[0543] like Figure 7 As shown, when the reference signal configuration is reference signal configuration #1 or reference signal configuration #2, the number of antenna ports corresponding to the first TD-OCC sequence is 8. Therefore, the second value set can be one or more of the following: {1}, {2}, {3}, {1, 2}, {1, 3}, {2, 3}, {1, 2, 3}.

[0544] Optionally, if the second value is 1, the first port group may include two first ports and one second port. Alternatively, the first port group may include three first ports and two second ports. Alternatively, the first port group may include four first ports and three second ports.

[0545] Exemplarily, taking the example that the first port group can include two first ports and one second port, when the reference signal configuration is reference signal configuration #1, the first port group can include any one of the following items: {1, 8, 9}, {2, 8, 9}, {3, 8, 9}, {1, 10, 11}, {2, 10, 11}, {3, 10, 11}. When the reference signal configuration is reference signal configuration #2, the port group indicated by the first antenna port information may include any one of the following: {1, 8, 9}, {2, 8, 9}, {3, 8, 9}, {1, 10, 11}, {2, 10, 11}, {3, 10, 11}, {4, 12, 13}, {5, 12, 13}, {6, 12, 13}, {7, 12, 13}, {4, 14, 15}, {5, 14, 15}, {6, 14, 15}, {7, 14, 15}.

[0546] Optionally, if the second value is 2, the first port group may include three first ports and one second port. Alternatively, the first port group may include four first ports and two second ports.

[0547] Exemplarily, taking the example that the first port group can include three first ports and one second port, when the reference signal configuration is reference signal configuration #1, the first port group can include any one of the following items: {1, 8, 9, 10}, {2, 8, 9, 10}, {2, 8, 9, 10}, {1, 8, 9, 11}, {2, 8, 9, 11}, {3, 8, 9, 11}, {1, 8, 10, 11}, {2, 8, 10, 11}, {3, 8, 10, 11}, {1, 9, 10, 11}, {2, 9, 10, 11}, {3, 9, 10, 11}. When the reference signal configuration is reference signal configuration #2, the first port group may include any one of the following items: {1, 8, 9, 10}, {2, 8, 9, 10}, {2, 8, 9, 10}, {1, 8, 9, 11}, {2, 8, 9, 11}, {3, 8, 9, 11}, {1, 8, 10, 11}, {2, 8, 10, 11}, {3, 8, 10, 11}, {1, 9, 10, 11}, {2, 9, 10, 11}, {3, 9, 10, 11}, {4, 12, 13, 14}, {5 , 12, 13, 14}, {6, 12, 13, 14}, {7, 12, 13, 14}, {4, 12, 13, 15}, {5, 12, 13, 15}, {6, 12, 13, 15}, {7, 12, 13, 15}, {4, 12, 14, 15}, {5, 12, 14, 15}, {6, 12, 14, 15}, {7, 12, 14, 15}, {4, 13, 14, 15}, {5, 13, 14, 15}, {6, 13, 14, 15}, {7, 13, 14, 15}.

[0548] Optionally, if the second value is 3, the first port group may include four first ports and one second port. Exemplarily, when the reference signal configuration is reference signal configuration #1, the first port group may include any one of the following multiple items: {1, 8, 9, 10, 11}, {2, 8, 9, 10, 11}, {3, 8, 9, 10, 11}. When the reference signal configuration is reference signal configuration #2, the first port group may include any one of the following multiple items: {1, 8, 9, 10, 11}, {2, 8, 9, 10, 11}, {3, 8, 9, 10, 11}, {4, 12, 13, 14, 15}, {5, 12, 13, 14, 15}, {6, 12, 13, 14, 15}, {7, 12, 13, 14, 15}.

[0549] Exemplarily, when the reference signal configuration is reference signal configuration # 1, the implementation of the first antenna port information of the X group is similar to that of the above table 32, and specific reference may be made to the relevant description of the above table 32. When the reference signal configuration is reference signal configuration # 2, the implementation of the first antenna port information of the X group is similar to that of the above table 33, and specific reference may be made to the relevant description of the above table 33, which will not be repeated here.

[0550] like Figure 7 As shown, when the reference signal configuration is reference signal configuration #3 or reference signal configuration #4, the number of antenna ports corresponding to the first TD-OCC sequence is 12. Therefore, the second value set can be one or more of the following: {1}, {2}, {3}, {4}, {5}, {1, 2}, {1, 3}, {1, 4}, {1, 5}, {2, 3}, {2, 4}, {2, 5}, {3, 3}, {3, 4}, {3, 5}, {4, 5}, {1, 2, 3} ... {1, 2, 3, 4}, {1, 2, 3, 4, 5}.

[0551] Optionally, if the second value is 1, the first port group may include two first ports and one second port. Alternatively, the first port group may include three first ports and two second ports. Alternatively, the first port group may include four first ports and three second ports. Alternatively, the first port group may include five first ports and four second ports. Alternatively, the first port group may include six first ports and five second ports.

[0552] Exemplarily, taking the example that the first port group may include six first ports and five second ports, when the reference signal configuration is reference signal configuration #3, the first port group may include any of the following items: {1, 2, 3, 4, 5, 12, 13, 14, 15, 16, 17}. When the reference signal configuration is reference signal configuration #4, the first port group may include any of the following items: {1, 2, 3, 4, 5, 12, 13, 14, 15, 16, 17}, {6, 7, 8, 9, 10, 18, 19, 20, 21, 22, 23}, {6, 7, 8, 9, 11, 18, 19, 20, 21, 22, 23}, {7, 8, 9, 10, 11, 18, 19, 20, 21, 22, 23}.

[0553] Optionally, if the second value is 2, the first port group may include three first ports and one second port. Alternatively, the first port group may include four first ports and two second ports. Alternatively, the first port group may include five first ports and three second ports. Alternatively, the first port group may include six first ports and four second ports.

[0554] Exemplarily, taking the example that the first port group can include six first ports and four second ports, when the reference signal configuration is reference signal configuration #3, the first port group can include any one of the following items: {1, 2, 3, 4, 12, 13, 14, 15, 16, 17}, {1, 2, 3, 5, 12, 13, 14, 15, 16, 17}, {2, 3, 4, 5, 12, 13, 14, 15, 16, 17}. When the reference signal configuration is reference signal configuration #4, the first port group may include any one of the following: {1, 2, 3, 4, 12, 13, 14, 15, 16, 17}, {1, 2, 3, 5, 12, 13, 14, 15, 16, 17}, {2, 3, 4, 5, 12, 13, 14, 15, 16, 17}, {7, 8, 9, 10, 18, 19, 20, 21, 22}, {7, 8, 9, 11, 18, 19, 20, 21, 22}, {8, 9, 10, 11, 18, 19, 20, 21, 22}.

[0555] Optionally, if the second value is 3, the first port group may include four first ports and one second port. Alternatively, the first port group may include five first ports and two second ports. Alternatively, the first port group may include six first ports and three second ports.

[0556] Exemplarily, taking the example that the first port group may include six first ports and three second ports, when the reference signal configuration is reference signal configuration #3, the first port group may include any one of the following multiple items: {1, 2, 3, 12, 13, 14, 15, 16, 17}, {1, 2, 4, 12, 13, 14, 15, 16, 17}, {1, 2, 5, 12, 13, 14, 15, 16, 17}, , 13, 14, 15, 16, 17}, {1, 3, 4, 12, 13, 14, 15, 16, 17}, {2, 3, 4, 12, 13, 14, 15, 16, 17}, {2, 3, 5, 12, 13, 14, 15, 16, 17}, {3, 4, 5, 12, 13, 14, 15, 16, 17}.

[0557] When the reference signal configuration is reference signal configuration #4, the first port group may include any one of the following items: {1, 2, 3, 12, 13, 14, 15, 16, 17}, {1, 2, 4, 12, 13, 14, 15, 16, 17}, {1, 2, 5, 12, 13, 14, 15, 16, 17}, {1, 3, 4, 12, 13, 14, 15, 16, 17}, {1, 3, 5, 12, 13, 14, 15, 16, 17}, {2, 3, 4, 12, 13, 14, 15, 16, 17}, { 2, 3, 5, 12, 13, 14, 15, 16, 17}, {3, 4, 5, 12, 13, 14, 15, 16, 17}, {6, 7, 9, 18, 19, 20, 21, 22, 23}, {6, 7, 9, 18, 19, 20, 21, 22, 23}, {6, 7, 10, 18, 19, 20, 21, 22, 23}, {6, 7, 11, 18, 19, 20, 21, 22, 23}, {6, 8, 9, 18, 19, 20, 21, 22, 23}, {6, 8, 10, 18, 19, 20, 21, 22, 23}, {6, 8, 11, 18, 19, 20, 21, 22, 23}, {6, 9, 10, 18, 19, 20, 21, 22, 23}, {6, 9, 11, 18, 19, 20, 21, 22, 23}, {6, 10, 11, 18, 19, 20, 21, 22, 23}, {7, 8, 9, 18, 19, 20, 21, 22, 23}, {7, 8, 10, 18, 19, 20, 21, 22, 23}, {7, 8, 11, 18, 19, 20, 21, 22, 23} , 23}, {7, 9, 10, 18, 19, 20, 21, 22, 23}, {7, 9, 11, 18, 19, 20, 21, 22, 23}, {7, 10, 11, 18, 19, 20, 21, 22, 23}, {8, 9, 10, 18, 19, 20, 21, 22, 23}, {8, 9, 11, 18, 19, 20, 21, 22, 23}, {8, 10, 11, 18, 19, 20, 21, 22, 23}, {9, 10, 11, 18, 19, 20, 21, 22, 23}.

[0558] Optionally, if the second value is 4, the first port group may include five first ports and one second port. Alternatively, the first port group may include six first ports and two second ports.

[0559] Exemplarily, taking the case where the first port group may include six first ports and two second ports, when the reference signal configuration is reference signal configuration #3, the first port group may include any one of the following multiple items: {1, 2, 12, 13, 14, 15, 16, 17}, {1, 3, 12, 13, 14, 15, 16, 17}, {1, 4, 12, 13, 14, 15, 16, 17}, {1, 5, 12, 13, 14 , 15, 16, 17}, {2, 3, 12, 13, 14, 15, 16, 17}, {2, 4, 12, 13, 14, 15, 16, 17}, {2, 5, 12, 13, 14, 15, 16, 17}, {3, 4, 12, 13, 14, 15, 16, 17}, {3, 5, 12, 13, 14, 15, 16, 17}, {4, 5, 12, 13, 14, 15, 16, 17}. When the reference signal configuration is reference signal configuration #4, the first port group may include any one of the following multiple items: {1, 2, 12, 13, 14, 15, 16, 17}, {1, 3, 12, 13, 14, 15, 16, 17}, {1, 4, 12, 13, 14, 15, 16, 17}, {1, 5, 12, 13, 14, 15, 16, 17}, {2, 3, 12, 13, 14, 15, 16, 17}, {2, 4, 12, 13, 14, 15, 16, 17}, {2, 5, 12, 13, 14, 15, 16, 17}, {3, 4, 12, 13, 14, 15, 16, 17}, {3, 5, 12, 13, 14, 15, 16, 17}, {4, 5, 12, 13, 14, 15, 16, 17}, {7, 8, 18, 19, 20, 21, 22, 23}, {7, 9, 18, 19, 20, 21, 22, 23}, {7, 10, 18, 19, 20, 21, 22, 23}, {7, 11, 18, 19, 20, 21, 22, 23}, {8, 9, 18, 19, 20, 21, 2 2, 23}, {8, 10, 18, 19, 20, 21, 22, 23}, {8, 11, 18, 19, 20, 21, 22, 23}, {9, 10, 18, 19, 20, 21, 22, 23}, {9, 11, 18, 19, 20, 21, 22, 23}, {10, 11, 18, 19, 20, 21, 22, 23}.

[0560] Optionally, if the second value is 5, the first port group may include six first ports and one second port. Exemplarily, when the reference signal configuration is reference signal configuration #3, the first port group may include any one of the following: {1, 12, 13, 14, 15, 16, 17}, {2, 12, 13, 14, 15, 16, 17}, {3, 12, 13, 14, 15, 16, 17}, {4, 12, 13, 14, 15, 16, 17}, {5, 12, 13, 14, 15, 16, 17}. When the reference signal configuration is reference signal configuration #4, the first port group may include any one of the following multiple items: {1, 12, 13, 14, 15, 16, 17}, {2, 12, 13, 14, 15, 16, 17}, {3, 12, 13, 14, 15, 16, 17}, {4, 12, 13, 14, 15, 16, 17}, {5, 12, 13, 14, 15, 16, 17} , 16, 17}, {6, 18, 19, 20, 21, 22, 23}, {7, 18, 19, 20, 21, 22, 23}, {8, 18, 19, 20, 21, 22, 23}, {9, 18, 19, 20, 21, 22, 23}, {10, 18, 19, 20, 21, 22, 23}, {11, 18, 19, 20, 21, 22, 23}.

[0561] Exemplarily, when the reference signal configuration is reference signal configuration #3, the implementation of the first antenna port information of the X group is similar to that of the above table 35, and specific reference may be made to the relevant description of the above table 35. When the reference signal configuration is reference signal configuration #4, the implementation of the first antenna port information of the X group is similar to that of the above table 36, and specific reference may be made to the relevant description of the above table 36, which will not be repeated here.

[0562] Optionally, in this optional implementation, if the port group indicated by the first group of antenna port information is the first port group, the port group indicated by the first group of antenna port information corresponds to the same TD-OCC sequence. That is, the TD-OCC sequence of each antenna port in the multiple antenna ports in the port group indicated by the first group of antenna port information is the same.

[0563] Based on this possible implementation method, since the antenna ports in the port group indicated by the first group of antenna port information correspond to the same TD-OCC sequence, that is, the first terminal device can send or receive DMRS at the antenna port with the same TD-OCC sequence, compared with the solution in which the first terminal device sends or receives DMRS at the antenna port with different TD-OCC sequence, it can reduce the complexity of channel estimation and improve the channel estimation capability.

[0564] In a third possible implementation form, at least one first port and at least one second port correspond to the same TD-OCC sequence, and the at least one first port and the at least one second port belong to the same CDM group.

[0565] Optionally, the difference between the number of ports of at least one first port and the number of ports of at least one second port is a third value, the third value is in a third value set, the minimum value in the third value set is greater than or equal to 1, the maximum value in the third value set is less than half of the number of antenna ports corresponding to the first TD-OCC sequence in the first CDM group, the first CDM group is any one of the CDM groups under the reference signal configuration corresponding to the first antenna port indication table, the first TD-OCC sequence is the TD-OCC sequence corresponding to any antenna port in the first CDM group, and each value in the third value set is a positive integer.

[0566] like Figure 7 As shown, only when the first length is 2, there will be multiple antenna ports in the same CDM group with different TD-OCC sequences, that is, when the reference signal configuration is reference signal configuration #1 and reference signal configuration #3, multiple antenna ports in the same CDM group have the same TD-OCC sequence. Therefore, in this case, the number of antenna ports corresponding to the first TD-OCC sequence in the first CDM group is the number of antenna ports included in the first CDM group, that is, 4. When the reference signal configuration is reference signal configuration #2 and reference signal configuration #4, multiple antenna ports in the same CDM group have different TD-OCC sequences. Therefore, in this case, the number of antenna ports corresponding to the first TD-OCC sequence in the first CDM group is half the number of antenna ports included in the first CDM group, that is, 4. Based on the above analysis, it can be seen that the first value set is {1}.

[0567] Optionally, the port group indicated by the first antenna port information may include two first ports and one second port. Exemplarily, when the reference signal configuration is reference signal configuration #1, the first port group may include any one of the following items: {1, 8, 9}, {2, 10, 11}, {3, 10, 11}. When the reference signal configuration is reference signal configuration #1, the implementation of the first antenna port information of group X is similar to that of Table 32 above. For details, please refer to the relevant description of Table 32 above, which will not be repeated here.

[0568] When the reference signal configuration is reference signal configuration #2, the first port group may include any one of the following items: {1, 8, 9}, {2, 10, 11}, {3, 10, 11}, {4, 12, 13}, {5, 12, 13}, {6, 14, 15}, {7, 14, 15}. When the reference signal configuration is reference signal configuration #2, the first antenna port information of group X is similar to the implementation of Table 33 above. For details, please refer to the relevant description of Table 33 above, which will not be repeated here.

[0569] When the reference signal configuration is reference signal configuration #3, the first port group may include any one of the following items: {1, 12, 13}, {2, 14, 15}, {3, 14, 15}, {4, 16, 17}, {5, 16, 17}. When the reference signal configuration is reference signal configuration #3, the first antenna port information of the X group is similar to the implementation of Table 35 above. For details, please refer to the relevant description of Table 35 above, which will not be repeated here.

[0570] When the reference signal configuration is reference signal configuration #4, the first port group may include any one of the following items: {6, 18, 19}, {7, 18, 19}, {8, 20, 21}, {9, 20, 21}, {10, 22, 23}, {11, 22, 23}. When the reference signal configuration is reference signal configuration #4, the first antenna port information of group X is similar to the implementation of Table 36 above. For details, please refer to the relevant description of Table 36 above, which will not be repeated here.

[0571] Optionally, in this optional implementation, if the port group indicated by the first group of antenna port information is the first port group, the port group indicated by the first group of antenna port information corresponds to the same TD-OCC sequence, and multiple antenna ports in the port group indicated by the first group of antenna port information belong to the same CDM group.

[0572] Based on this possible implementation method, since the antenna ports in the port group indicated by the first group of antenna port information correspond to the same TD-OCC sequence, and multiple antenna ports belong to the same CDM group; that is, the first terminal can send or receive DMRS on the antenna port with the same TD-OCC sequence in the same CDM group. Compared with the scheme in which the first terminal device sends or receives DMRS on antenna ports with different TD-OCC sequences and / or belonging to different CDM groups, it can reduce the complexity of channel estimation and improve the channel estimation capability.

[0573] The above is an explanation of the case where the first antenna port indication table includes X groups of first antenna port information. In fact, in addition to the above X groups of first antenna port information, the first antenna port indication table may also include antenna port information having the following feature 1 and / or feature 2:

[0574] Feature 1: the antenna ports in the port group indicated by the antenna port information belong to multiple CDM groups, or the antenna ports in the port group indicated by the antenna port information correspond to multiple groups of TD-OCC sequences.

[0575] In a first possible implementation, the first antenna port indication table further includes Y groups of second antenna port information, the multiple antenna ports in the second port group indicated by the second antenna port information belong to different CDM groups, and Y is a positive integer. At this time, the antenna ports in the third port set other than the multiple antenna ports in the second port group are not used for physical downlink shared channel PDSCH transmission.

[0576] Exemplarily, implementation of the second antenna port information is similar to implementation of the first antenna port information. For details, reference may be made to the related description of the first antenna port information, which will not be repeated here.

[0577] Optionally, the second antenna port information of group Y may include the first group antenna port information, that is, multiple antenna ports in the port group indicated by the first group antenna port information belong to multiple CDM groups (or, multiple antenna ports in the port group indicated by the first group antenna port information span multiple CDM groups, or, multiple antenna ports in the port group indicated by the first group antenna port information belong to different CDM groups).

[0578] Exemplarily, the third port set may include the following three implementations:

[0579] As a first implementation, the third port set includes orthogonal antenna ports supported under the reference signal configuration.

[0580] Exemplarily, when the received second indication information corresponds to the second port group, that is, when the port group indicated by the first group of antenna port information is the second port group, the first terminal device may assume that, among all orthogonal antenna ports supported under the reference signal configuration, all remaining orthogonal antenna port groups except the port group indicated by the first group of antenna port information are not associated with the physical downlink shared channel PDSCH transmission of terminal devices other than the first terminal device. For example, when the reference signal configuration is reference signal configuration #2, the second port group includes any one of the following items: {0-2}, {0-3}, {0, 2}. When the reference signal configuration is reference signal configuration #4, the second port group includes any one of the following items: {0-2}, {0-3}, {3-5}, {0, 2}.

[0581] As a second implementation, the third port set includes the orthogonal antenna ports in the multiple CDM groups to which the multiple orthogonal antenna ports in the second port group belong.

[0582] Exemplarily, when the received second indication information corresponds to the second port group, that is, when the port group indicated by the first group of antenna port information is the second port group, the first terminal device may assume that, among the antenna ports belonging to the same CDM group as the multiple orthogonal antenna ports in the second port group, all remaining orthogonal antenna ports except the multiple orthogonal antenna ports in the port group indicated by the first group of antenna port information are not associated with the PDSCH transmission of terminal devices other than the first terminal device. For example, when the reference signal configuration is reference signal configuration #2, the second port group includes any of the following items: {0-2}, {0-3}, {0, 2}, {0, 2, 4, 6}. When the reference signal configuration is reference signal configuration #4, the second port group includes any of the following items: {0-2}, {0-3}, {3-5}, {0, 2}.

[0583] As a third implementation, the third port set includes antenna ports in multiple CDM groups to which the multiple orthogonal antenna ports in the second port group belong, and having the same time division orthogonal masking code TD-OCC sequence as the multiple orthogonal antenna ports in the second port group.

[0584] Exemplarily, when the received second indication information corresponds to the second port group, that is, when the port group indicated by the first group of antenna port information is the second port group, the first terminal device may assume that the multiple orthogonal antenna ports in the port group indicated by the first group of antenna port information belong to the same CDM group, and among the orthogonal antenna ports with the same TD-OCC sequence as the multiple orthogonal antenna ports in the port group indicated by the first group of antenna port information, all remaining orthogonal antenna ports except the multiple orthogonal antenna ports in the port group indicated by the first group of antenna port information are not associated with the PDSCH transmission of terminal devices other than the first terminal device. For example, when the reference signal configuration is reference signal configuration #2, the second port group includes any of the following items: {0-2}, {0-3}, {0, 2}, {0, 2, 4, 6}. When the reference signal configuration is reference signal configuration #4, the second port group includes any of the following items: {0-2}, {0-3}, {3-5}, {0, 2}. Based on this optional scheme, since the antenna ports in the third port set except the multiple orthogonal antenna ports in the second port group are not used for data transmission (that is, the antenna ports in the third port set except the multiple orthogonal antenna ports in the second port group are not used for MU multiplexing with other devices except the first terminal device), that is to say, the first terminal device does not need to execute the step of determining whether the antenna ports in the third port set except the multiple orthogonal antenna ports in the second port group are not occupied by other devices. Compared with the case where the first terminal device receives an indication that the orthogonal antenna ports in the second port group belong to multiple CDM groups, the first terminal device needs to determine whether the antenna ports in the third port set except the multiple orthogonal antenna ports in the second port group are not occupied by other devices. This scheme can reduce the complexity of channel estimation and improve the channel estimation capability.

[0585] In a second possible implementation, the first antenna port indication table further includes Z groups of third antenna port information, the multiple antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, and Z is a positive integer. At this time, the antenna ports in the fourth port set except the multiple orthogonal antenna ports in the third port group are not used for PDSCH transmission.

[0586] Exemplarily, the implementation of the third antenna port information is similar to the implementation of the first antenna port information. For details, reference may be made to the relevant description of the first antenna port information, which will not be repeated here. Exemplarily, the fourth port set may include the following two implementations:

[0587] As a first implementation, the fourth port set includes orthogonal antenna ports supported under the reference signal configuration.

[0588] Exemplarily, when the received second indication information corresponds to the third port group, that is, when the port group indicated by the first group of antenna port information is the third port group, the first terminal device may assume that, among all orthogonal antenna ports supported under the reference signal configuration, all remaining orthogonal antenna port groups except the port group indicated by the first group of antenna port information are not associated with the physical downlink shared channel PDSCH transmission of terminal devices other than the first terminal device. For example, when the reference signal configuration is reference signal configuration #2, the third port group includes any one of the following items: {0-2}, {0-3}, {0, 2}. When the reference signal configuration is reference signal configuration #4, the third port group includes any one of the following items: {0, 1, 6}, {2, 3, 8}, {4, 5, 10}, {0, 1, 6, 7}, {2, 3, 8, 9}, {4, 5, 10, 11}.

[0589] As a second implementation, the fourth port set includes orthogonal antenna ports in multiple CDM groups to which the multiple orthogonal antenna ports in the third port group belong.

[0590] Exemplarily, when the received second indication information corresponds to the third port group, that is, when the port group indicated by the first group of antenna port information is the third port group, the first terminal device may assume that, among the antenna ports belonging to the same CDM group as the multiple orthogonal antenna ports in the third port group, all remaining orthogonal antenna ports except the multiple orthogonal antenna ports in the port group indicated by the first group of antenna port information are not associated with PDSCH transmissions of terminal devices other than the first terminal device. For example, when the reference signal configuration is reference signal configuration #2, the third port group includes any one of the following items: {0, 4}, {2, 6}, {0, 1, 4}, {2, 3, 6}, {0, 1, 4, 5}, {2, 3, 6, 7}. When the reference signal configuration is reference signal configuration #4, the third port group includes any one of the following items: {0, 1, 6}, {2, 3, 8}, {4, 5, 10}, {0, 1, 6, 7}, {2, 3, 8, 9}, {4, 5, 10, 11}.

[0591] Optionally, in addition to the above examples, the third port group may also include the following three possible implementation forms:

[0592] As an example, the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, including: the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, and the TD-OCC sequences of the multiple orthogonal antenna ports in the third port group are orthogonal to each other.

[0593] Exemplarily, when the first configuration type is type 1, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, the third port group includes any one of the following items: {0, 4}, {2, 6}, {0, 2, 4, 6}.

[0594] As another example, the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, including: the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, the TD-OCC sequences of the multiple orthogonal antenna ports in the third port group are mutually orthogonal, and the frequency division mask FD-OCC sequences of the multiple orthogonal antenna ports in the third port group are the same. Alternatively, the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, including: the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, the TD-OCC sequences of the multiple orthogonal antenna ports in the third port group are mutually orthogonal, and the multiple orthogonal antenna ports in the third port group belong to the same CDM group.

[0595] Exemplarily, when the first configuration type is type 1, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, the third port group includes any one of the following items: {0, 4}, {2, 6}.

[0596] Based on this optional solution, since the multiple orthogonal antenna ports in the third port group belong to the same CDM group, the first terminal device can send or receive DMRS on the port of the same CDM group, which can reduce the complexity of channel estimation and improve the channel estimation capability compared to the port group in which the multiple orthogonal antenna ports belong to multiple CDM groups. In addition, the orthogonal antenna ports in other CDM groups except the CDM group to which the multiple orthogonal antenna ports in the third port group belong can be allocated to other terminal devices except the first terminal device for sending or receiving DMRS.

[0597] As another example, the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, including: the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, the TD-OCC sequences of the multiple orthogonal antenna ports in the third port group are mutually orthogonal, and the multiple orthogonal antenna ports in the third port group belong to multiple groups of CDM groups. Alternatively, the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, including: the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, the TD-OCC sequences of the multiple orthogonal antenna ports in the third port group are mutually orthogonal, and the frequency division mask FD-OCC sequences of the multiple orthogonal antenna ports in the third port group are different.

[0598] Exemplarily, the first configuration type is type 1, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, and the third port group includes any one of the following items: {0, 2, 4, 6}. Based on this possible implementation, since the antenna ports in the fourth port set other than the multiple orthogonal antenna ports in the third port group are not used for data transmission (that is, the orthogonal antenna ports in the fourth port set other than the multiple orthogonal antenna ports in the third port group are not used for MU multiplexing with other devices other than the first terminal device), that is to say, the first terminal device does not need to perform the step of determining whether the orthogonal antenna ports in the fourth port set other than the multiple orthogonal antenna ports in the third port group are not occupied by other devices. Compared with the case where the first terminal device receives an indication that the orthogonal antenna ports in the third port group correspond to multiple groups of TD-OCC sequences, the first terminal device needs to determine whether the orthogonal antenna ports in the fourth port set other than the multiple orthogonal antenna ports in the third port group are not occupied by other devices, which can reduce the complexity of channel estimation and improve channel estimation capability.

[0599] Feature 2: The first antenna port indication table also includes K groups of fourth antenna port information, the fourth antenna port information is used to determine a first layer combination with at least one group of first antenna port information, the first layer combination is used to configure antenna ports for multiple terminal devices, the multiple terminal devices include the first terminal device, and K is a positive integer. The antenna ports in at least one first port group indicated by at least one group of first antenna port information do not overlap with the antenna ports in at least one fourth port group indicated by at least one group of fourth antenna port information, and the antenna ports in at least one first port group do not overlap. Exemplarily, the fourth antenna port information may include the following two implementation methods:

[0600] In a possible implementation manner, the number of reference signal CDM groups without data respectively indicated by at least one set of first antenna port information is the same as the number of CDM groups without data indicated by the fourth antenna port information.

[0601] Exemplarily, taking the first antenna port group indication table including Table 33, at least one group of first antenna port information is the antenna port information in Table 33, at least one group of first antenna port information includes two groups of first antenna port information, and the second port groups indicated by the two groups of first antenna port information are {1, 8, 9, 12}, {3, 11, 14, 15} respectively, as an example, according to the above Table 33A, it can be known that the numbers of reference signal CDM groups without data respectively indicated by the two groups of first antenna port information are both 2. Therefore, the first antenna port group indication table also includes Table 21, and the fourth antenna port information can be any one of index 3, index 5, index 11-12, index 14, index 16-19, index 22-25, or index 30 in Table 21.

[0602] In another possible implementation manner, at least one port in the second port group and a port in the third port group belong to the same CDM group.

[0603] Exemplarily, taking the first antenna port group indication table including Table 33, at least one group of first antenna port information is the antenna port information in Table 33, at least one group of first antenna port information includes two groups of first antenna port information, and the second port groups indicated by the two groups of first antenna port information are {1, 8, 9}, {3, 10, 11} respectively, as an example, according to the above Table 33A, the numbers of reference signal CDM groups without data respectively indicated by the two groups of first antenna port information are both 2. Therefore, the first antenna port group indication table also includes Table 21, and the fourth antenna port information can be any one of index 3, index 5, index 11-12, and index 14 in Table 21.

[0604] Based on this possible implementation, the antenna ports configured by the network device for the terminal devices participating in MU-MIMO belong to the same CDM group, so that the antenna ports in other CDM groups except this CDM group can be configured to other devices except the terminal devices participating in MU-MIMO.

[0605] Optionally, the antenna ports in at least one first port group do not overlap with the antenna ports in at least one fourth port group, and the antenna ports in at least one first port group do not overlap, which can be understood as: the antenna ports in at least one first port group and the antenna ports in at least one fourth port group are different antenna ports.

[0606] Optionally, before step S502, Figure 6 As shown, the communication method may further include the following steps:

[0607] S504: The network device determines the maximum number of transmission layers (the number of antenna ports supported under the reference signal configuration) according to the reference signal configuration.

[0608] Exemplarily, the implementation of determining the maximum number of transmission layers according to the reference signal configuration may refer to the related description of the number of antenna ports supported under the above reference signal configuration, which will not be repeated here.

[0609] S505: The network device determines a first layer number combination according to the maximum number of transmission layers and the number of terminal devices participating in MU-MIMO.

[0610] Optionally, the sum of the number of antenna ports in the first layer number combination is less than or equal to the maximum number of transmission layers supported under the parameter configuration corresponding to the first antenna port indication table.

[0611] Exemplarily, when the reference signal configuration is reference signal configuration #1, the maximum number of transmission layers supported (i.e., the number of antenna ports supported) is 8. Therefore, under reference signal configuration #1, the sum of the number of antenna ports in the first layer number combination is less than or equal to 8; when the reference signal configuration is reference signal configuration #2, the maximum number of transmission layers supported (i.e., the number of antenna ports supported) is 16. Therefore, under reference signal configuration #2, the sum of the number of antenna ports in the first layer number combination is less than or equal to 16; when the reference signal configuration is reference signal configuration #3, the maximum number of transmission layers supported (i.e., the number of antenna ports supported) is 12. Therefore, under reference signal configuration #3, the sum of the number of antenna ports in the first layer number combination is less than or equal to 12; when the reference signal configuration is reference signal configuration #4, the maximum number of transmission layers supported (i.e., the number of antenna ports supported) is 24. Therefore, under reference signal configuration #4, the sum of the number of antenna ports in the first layer number combination is less than or equal to 24.

[0612] Optionally, the parameter in the first layer number combination may be the number of ports. That is, the first layer number combination may include multiple groups of port numbers. Further, the number of items of the parameter in the first layer number combination is the number of terminal devices participating in MU-MIMO.

[0613] For example, if the number of terminal devices participating in MU-MIMO is 3, the first layer number combination includes 3 items. Each parameter corresponds to one of the terminal devices participating in MU-MIMO. That is, each parameter in the first layer number combination represents the number of antenna ports configured for one of the terminal devices participating in MU-MIMO. In other words, the number of ports in multiple groups includes the number of ports corresponding to at least one first port group and the number of ports corresponding to at least one fourth port group.

[0614] Optionally, the port group indicated by the first antenna port information enables the first layer combination, that is, the network device can schedule the port group of the corresponding number of ports for the first terminal device from the first antenna port information of the X group according to the first layer combination. Exemplarily, in PUSCH transmission, the fourth port group supports all layer combinations. That is, the fourth port group can participate in multi-user MU transmission together with port groups other than the fourth port group (such as the first port group, the second port group, and the third port group).

[0615] As an example, one fourth port group may participate in multi-user MU transmission together with four first port groups.

[0616] Exemplarily, when the reference information is configured as reference signal configuration #2, the four first port groups may be {1, 8, 9}, {5, 12, 13}, {3, 10, 11}, {7, 14, 15}, respectively, and the fourth port group may be {0, 2, 4, 6}. At this time, the first layer number combination includes 5 groups of port numbers, and the 5 groups of port numbers are {3, 3, 3, 3, 4}. And the sum of the 5 groups of port numbers is 16, that is, the first layer number combination is a 16-layer paired layer number combination.

[0617] Alternatively, when the reference information is configured as reference signal configuration #2, the four first port groups may be {1, 8, 9}, {5, 12, 13}, {3, 10, 11}, {7, 14, 15}, respectively, and the fourth port group may be {2, 4, 6}. At this time, the first layer number combination includes 5 groups of port numbers, and the 5 groups of port numbers are {3, 3, 3, 3, 3}. And the sum of the 5 groups of port numbers is 15, that is, the first layer number combination is a 15-layer paired layer number combination.

[0618] As another example, two fourth port groups may participate in multi-user MU transmission together with four first port groups.

[0619] Exemplarily, when the reference information is configured as reference signal configuration #2, the four first port groups may be {1, 8, 9}, {5, 12, 13}, {3, 10, 11}, {7, 14, 15}, respectively, and the two fourth port groups may be {0, 2}, {4, 6}, respectively. At this time, the first layer number combination includes 6 groups of port numbers, and the 6 groups of port numbers are {3, 3, 3, 3, 2, 2}. And the sum of the 6 groups of port numbers is 16, that is, the first layer number combination is a 16-layer paired layer number combination.

[0620] As yet another example, three fourth port groups may participate in multi-user MU transmission together with two first port groups.

[0621] Exemplarily, when the reference information is configured as reference signal configuration #2, the three first port groups may be {1, 8, 9}, {5, 12, 13}, respectively, and the three fourth port groups may be {0, 4}, {2, 3, 10, 11}, {6, 7, 14, 15}, respectively. At this time, the first layer number combination includes 5 groups of port numbers, and the 5 groups of port numbers are {3, 3, 2, 4, 4}. And the sum of the 5 groups of port numbers is 16, that is, the first layer number combination is a 16-layer paired layer number combination.

[0622] As yet another example, two fourth port groups may participate in multi-user MU transmission together with six first port groups.

[0623] Exemplarily, when the first configuration type is type2, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, the six first port groups can be {1, 12, 13}, {7, 18, 19}, {3, 14, 15}, {9, 20, 21}, {5, 16, 17}, {11, 22, 23}, respectively, and the two fourth port groups can be {0, 2, 6}, {4, 8, 10}, respectively. At this time, the first layer number combination includes 6 groups of port numbers, and the 6 groups of port numbers are {3, 3, 3, 3, 3, 3, 3, 3}. And the sum of the 8 groups of port numbers is 24, that is, the first layer number combination is a 24-layer paired layer number combination.

[0624] As yet another example, five fourth port groups may participate in multi-user MU transmission together with two first port groups.

[0625] Exemplarily, when the first configuration type is type2, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, the two first port groups may be {1, 12, 13}, {7, 18, 19} respectively, and the five fourth port groups may be

[0626] {2, 3, 14, 15}, {8, 9, 20, 21}, {4, 5, 16, 17}, {10, 11, 22, 23}, {0, 6}. At this time, the first layer number combination includes 7 groups of port numbers, and the 7 groups of port numbers are {3, 3, 4, 4, 4, 4, 2}. And the sum of the 7 groups of port numbers is 24, that is, the first layer number combination is a 24-layer paired layer number combination.

[0627] In addition to the implementation form of the first layer number combination described above, the first layer number combination may include at least one fourth port group.

[0628] Optionally, the first layer number combination includes six fourth port groups.

[0629] Exemplarily, when the first configuration type is type2, the first length is 2, and the first enhancement information indicates that the enhanced reference signal type is turned on, the six fourth port groups can be {0, 1, 12, 13}, {6, 7, 18, 19}, {2, 3, 14, 15}, {8, 9, 20, 21}, {4, 5, 16, 17}, {10, 11, 22, 23}. At this time, the first layer number combination includes 6 groups of port numbers, and the 6 groups of port numbers are {4, 4, 4, 4, 4, 4}. And the sum of the 6 groups of port numbers is 24, that is, the first layer number combination is a 24-layer paired layer number combination.

[0630] In a possible design, the fourth port is applicable to multiple layer number combinations, wherein the sum of the numbers of antenna ports in the multiple layer number combinations is the same.

[0631] Exemplarily, when the reference information is configured as reference signal configuration #2, the first layer combination is {3, 3, 3, 3, 4}, and the 5 port groups corresponding to the first layer combination are {1, 8, 9}, {5, 12, 13}, {3, 10, 11}, {7, 14, 15}, and {0, 2, 4, 6}, respectively. At this time, the first layer combination is a 16-layer paired layer combination (that is, the number of antenna ports in the first layer combination is 16). Therefore, the fourth port group {0, 2, 4, 6} can be used for layer combinations other than the first layer combination in the 16-layer paired layer combination. For example, the fourth port is also applicable to the layer combination {3, 3, 2, 4, 4}, or the layer combination {5, 4, 3, 4}, etc. The above embodiments are only illustrative descriptions of partial implementations of the first layer combination. In fact, the first layer combination may have other implementations besides the above examples. For example, the first layer combination may be {2, 3, 5, 2, 2}, etc., and its specific implementation is similar to the implementation of the above first layer combination. For details, please refer to the relevant description of the above first layer combination and will not be repeated here.

[0632] It can be understood that in the above embodiments, the methods and / or steps implemented by the network device can also be implemented by components that can be used for the network device (such as a processor, chip, chip system, circuit, logic module, or software such as a chip or circuit); the methods and / or steps implemented by the terminal device can also be implemented by components that can be used for the terminal device (such as a processor, chip, chip system, circuit, logic module, or software such as a chip or circuit).

[0633] The above mainly introduces the scheme provided by the present application. Accordingly, the present application also provides a communication device, which is used to implement the above various methods. The communication device can be the first terminal device in the above method embodiment, or a device including the above first terminal device, or a component that can be used for the network device or the first terminal device, such as a chip or a chip system; or, the communication device can be the network device in the above method embodiment, or a device including the above network device, or a component that can be used for the network device, such as a chip or a chip system.

[0634] It is understandable that, in order to realize the above functions, the communication device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0635] The embodiment of the present application can divide the functional modules of the communication device according to the above method embodiment. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0636] communication device Figure 8 A schematic diagram of the structure of a communication device 80 is shown. The communication device 80 includes a processing module 801 and a transceiver module 802. The communication device 80 can be used to implement the functions of the first terminal device or network device mentioned above.

[0637] In some embodiments, the communication device 80 may further include a storage module ( Figure 8 ), for storing program instructions and data.

[0638] In some embodiments, the transceiver module 802 may also be referred to as a transceiver unit for implementing a sending and / or receiving function. The transceiver module 802 may be composed of a transceiver circuit, a transceiver, a transceiver or a communication interface.

[0639] In some embodiments, the transceiver module 802 may include a receiving module and a sending module, which are respectively used to execute the receiving and sending steps performed by the network device or the terminal device in the above-mentioned method embodiment, and / or used to support other processes of the technology described in this document; the processing module 801 may be used to execute the processing steps (such as determination, generation, etc.) performed by the network device or the terminal device in the above-mentioned method embodiment, and / or used to support other processes of the technology described in this document.

[0640] When the communication device 80 is used to implement the functions of the first terminal device:

[0641] In some embodiments, the transceiver module 802 is used to receive first indication information, the first indication information indicates a first antenna port indication table, the first antenna port indication table includes X groups of first antenna port information, X is a positive integer, the first port group indicated by the first antenna port information includes at least one first port and at least one second port, the number of ports of at least one first port is greater than the number of ports of at least one second port, at least one first port is located in the first port set, at least one second port is located in the second port set, and the port index of any antenna port in the first port set is greater than the port index of any antenna port in the second port set, and the maximum port index in the second port set is less than half of the number of antenna ports supported under the reference signal configuration corresponding to the first antenna port indication table. The transceiver module 802 is also used to receive second indication information, the second indication information indicates the first group of antenna port information, and the first antenna port indication table includes the first group of antenna port information.

[0642] Optionally, the processing module 801 is configured to communicate according to a port group indicated by the first group of antenna port information.

[0643] When the communication device 80 is used to implement the functions of the above network device:

[0644] In some embodiments, the transceiver module 802 is used to send first indication information to the first terminal device, the first indication information indicates a first antenna port indication table, the first antenna port indication table includes X groups of first antenna port information, X is a positive integer, the first port group indicated by the first antenna port information includes at least one first port and at least one second port, the port number of at least one first port is greater than the port number of at least one second port, at least one first port is located in the first port set, at least one second port is located in the second port set, and the port index of any antenna port in the first port set is greater than the port index of any antenna port in the second port set, and the maximum port index in the second port set is less than half of the number of antenna ports supported under the reference signal configuration corresponding to the first antenna port indication table; the transceiver module 802 is also used to send second indication information to the first terminal device, the second indication information indicates the first group of antenna port information, and the first antenna port indication table includes the first group of antenna port information.

[0645] Among them, all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module, and will not be repeated here.

[0646] In the present application, the communication device 80 may be presented in the form of dividing various functional modules in an integrated manner. The "module" here may refer to a specific application-specific integrated circuit (ASIC), a circuit, a processor and a memory that executes one or more software or firmware programs, an integrated logic circuit, and / or other devices that can provide the above functions.

[0647] In some embodiments, when Figure 8 When the communication device 80 is a chip or a chip system, the function / implementation process of the transceiver module 802 can be implemented through the input and output interface (or communication interface) of the chip or the chip system, and the function / implementation process of the processing module 801 can be implemented through the processor (or processing circuit) of the chip or the chip system.

[0648] Since the communication device 80 provided in this embodiment can execute the above method, the technical effects that can be obtained can refer to the above method embodiment and will not be repeated here.

[0649] As a possible product form, the first terminal device or network device described in the embodiment of the present application can also be implemented using the following: one or more field programmable gate arrays (FPGA), programmable logic devices (PLD), controllers, state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits that can perform the various functions described throughout the present application.

[0650] As another possible product form, the network device or the first terminal device of the embodiment of the present application can be implemented by a general bus architecture. Fig. 9 , Fig. 9 is a schematic diagram of the structure of a communication device 90 provided in an embodiment of the present application, and the communication device 90 includes a processor 901 and a transceiver 902. The communication device 90 may be a first terminal device, or a chip or chip system therein; or, the communication device 90 may be a network device, or a chip or module therein. Fig. 9 Only the main components of the communication device 90 are shown. In addition to the processor 901 and the transceiver 902, the communication device may further include a memory 903, and an input and output device ( Fig. 9 not indicated).

[0651] Optionally, the processor 901 is mainly used to process the communication protocol and communication data, and to control the entire communication device, execute the software program, and process the data of the software program. The memory 903 is mainly used to store the software program and data. The transceiver 902 may include a radio frequency circuit and an antenna. The radio frequency circuit is mainly used for converting the baseband signal and the radio frequency signal and processing the radio frequency signal. The antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. The input and output devices, such as a touch screen, a display screen, a keyboard, etc., are mainly used to receive data input by the user and output data to the user.

[0652] Optionally, the processor 901, the transceiver 902, and the memory 903 may be connected via a communication bus.

[0653] When the communication device is turned on, the processor 901 can read the software program in the memory 1103, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 901 performs baseband processing on the data to be sent, and outputs the baseband signal to the RF circuit. The RF circuit performs RF processing on the baseband signal and then sends the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor 901. The processor 901 converts the baseband signal into data and processes the data.

[0654] In another implementation, the RF circuit and antenna may be arranged independently of the processor performing baseband processing. For example, in a distributed scenario, the RF circuit and antenna may be arranged remotely from the communication device.

[0655] In some embodiments, in terms of hardware implementation, those skilled in the art may imagine that the communication device 80 may be implemented as Fig. 9 The form of the communication device 90 is shown.

[0656] As an example, Figure 8 The function / implementation process of the processing module 801 in Fig. 9 The processor 801 in the communication device 90 shown calls the computer execution instructions stored in the memory 803 to implement. Figure 8 The function / implementation process of the transceiver module 802 can be achieved by Fig. 9 The transceiver 902 in the communication device 90 shown is implemented.

[0657] As another possible product form, the network device or the first terminal device in the present application can adopt Fig.10 The structure shown, or including Fig.10 Parts shown. Fig.10 A schematic diagram of the composition of a communication device 100 provided in the present application, wherein the communication device 100 may be a first terminal device or a chip or a system on chip in the first terminal device; or, it may be a network device or a module or chip or a system on chip in a network device.

[0658] like Fig.10 As shown, the communication device 100 includes at least one processor 1001 and at least one communication interface ( Fig.10 The communication device 100 is merely exemplary and is described by taking a communication interface 1004 and a processor 1001 as an example. Optionally, the communication device 100 may further include a communication bus 1002 and a memory 1003.

[0659] The processor 1001 may be a general-purpose central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 1001 may also be other devices with processing functions, such as circuits, devices, or software modules, without limitation.

[0660] The communication bus 1002 is used to connect different components in the communication device 100 so that the different components can communicate. The communication bus 1002 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.10 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0661] The communication interface 1004 is used to communicate with other devices or communication networks. Exemplarily, the communication interface 1004 can be a module, a circuit, a transceiver, or any device capable of implementing communication. Optionally, the communication interface 1004 can also be an input / output interface located in the processor 1001 to implement signal input and signal output of the processor.

[0662] The memory 1003 may be a device with a storage function, used to store instructions and / or data, wherein the instructions may be computer programs.

[0663] Exemplarily, the memory 1003 may be a read-only memory (ROM) or other types of static storage devices that can store static information and / or instructions, or a random access memory (RAM) or other types of dynamic storage devices that can store information and / or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.

[0664] It should be noted that the memory 1003 may exist independently of the processor 1001, or may be integrated with the processor 1001. The memory 1003 may be located inside the communication device 100, or may be located outside the communication device 100, without limitation. The processor 1001 may be used to execute instructions stored in the memory 1003 to implement the methods provided in the following embodiments of the present application.

[0665] As an optional implementation, the communication device 100 may further include an output device 1005 and an input device 1006. The output device 1005 communicates with the processor 1001 and can display information in a variety of ways. For example, the output device 1005 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. The input device 1006 communicates with the processor 1001 and can receive user input in a variety of ways. For example, the input device 1006 may be a mouse, a keyboard, a touch screen device, or a sensor device.

[0666] In some embodiments, in terms of hardware implementation, those skilled in the art may imagine that the communication device 80 may be implemented as Fig.10 The form of the communication device 100 is shown.

[0667] As an example, Figure 8 The function / implementation process of the processing module 801 in Fig.10 The processor 1001 in the communication device 100 shown calls the computer execution instructions stored in the memory 1003 to implement. Figure 8The function / implementation process of the transceiver module 802 can be achieved by Fig.10 The communication interface 1004 in the communication device 100 shown is implemented.

[0668] It should be noted that Fig.10 The structure shown does not constitute a specific limitation on the network device or terminal device. For example, in other embodiments of the present application, the network device or the first terminal device may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0669] In some embodiments, an embodiment of the present application further provides a communication device, which includes a processor for implementing a method in any of the above method embodiments.

[0670] As a possible implementation, the communication device further includes a memory. The memory is used to store necessary computer programs and data. The computer program may include instructions, and the processor may call the instructions in the computer program stored in the memory to instruct the communication device to execute the method in any of the above method embodiments. Of course, the memory may not be in the communication device.

[0671] As another possible implementation, the communication device also includes an interface circuit, which is a code / data read / write interface circuit, which is used to receive computer execution instructions (computer execution instructions are stored in a memory, may be read directly from the memory, or may pass through other devices) and transmit them to the processor.

[0672] As another possible implementation manner, the communication device further includes a communication interface, and the communication interface is used to communicate with a module outside the communication device.

[0673] It can be understood that the communication device can be a chip or a chip system. When the communication device is a chip system, it can be composed of chips, or it can include chips and other discrete devices. The embodiments of the present application do not specifically limit this.

[0674] The present application also provides a computer-readable storage medium on which a computer program or instruction is stored. When the computer program or instruction is executed by a computer, the functions of any of the above method embodiments are implemented.

[0675] The present application also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.

[0676] Those skilled in the art will appreciate that, for the sake of convenience and brevity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0677] It is understood that the systems, devices and methods described in the present application can also be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. 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. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0678] The units described as separate components may or may not be physically separated, i.e., they may be located in one place, or they may be distributed over multiple network units. The components shown as units may or may not be physical units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0679] In addition, 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.

[0680] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or may contain one or more servers, data centers and other data storage devices that can be integrated with the medium. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)), etc. In the embodiment of the present application, the computer may include the aforementioned device.

[0681] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art may understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in a claim. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0682] Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, a person skilled in the art may make various modifications and variations to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A communication method, characterized in that: The method comprises: Receive first indication information, where the first indication information indicates a first antenna port indication table, where the first antenna port indication table includes X groups of first antenna port information, where X is a positive integer, where the first port group indicated by the first antenna port information includes at least one first port and at least one second port, where the number of ports of the at least one first port is greater than the number of ports of the at least one second port, where the at least one first port is located in a first port set, where the at least one second port is located in a second port set, and where a port index of any antenna port in the first port set is greater than a port index of any antenna port in the second port set, and where a maximum port index in the second port set is less than half of the number of antenna ports supported under a reference signal configuration corresponding to the first antenna port indication table; Second indication information is received, where the second indication information indicates a first group of antenna port information, and the first antenna port indication table includes the first group of antenna port information.

2. The method according to claim 1, characterized in that The first indication information includes the reference signal configuration, the reference signal configuration is associated with the first antenna port indication table, the reference signal configuration includes a first configuration type, a first length and first enhancement information, wherein the first configuration type is the configuration type of the reference signal corresponding to the first antenna port indication table, the first length is the maximum length of the reference signal corresponding to the first antenna port indication table in the time domain, and the first enhancement information indicates that the first configuration type is an enhanced type.

3. The method according to claim 1 or 2, characterized in that: The number of ports in the first port set is equal to the number of ports in the second port set.

4. The method according to claim 1 or 2, characterized in that: The port index of the second port is greater than 0.

5. The method according to any one of claims 1 to 4, characterized in that: The multiple antenna ports in the first port group belong to the same code division multiplexing CDM group.

6. The method according to claim 5, characterized in that The difference between the number of ports of the at least one first port and the number of ports of the at least one second port is a first numerical value, the first numerical value is in a first numerical value set, the minimum numerical value in the first numerical value set is greater than or equal to 1, the maximum numerical value in the first numerical value set is less than half of the number of antenna ports included in the first CDM group, the first CDM group is any one of the CDM groups under the reference signal configuration corresponding to the first antenna port indication table, and each numerical value in the first numerical value set is a positive integer.

7. The method according to any one of claims 1 to 4, characterized in that: The multiple antenna ports in the first port group correspond to the same time division orthogonal cover code TD-OCC sequence.

8. The method according to claim 7, characterized in that The difference between the number of ports of the at least one first port and the number of ports of the at least one second port is a second value, the second value is in a second value set, the minimum value in the second value set is greater than or equal to 1, the maximum value in the second value set is less than half of the number of antenna ports corresponding to the first TD-OCC sequence, the first TD-OCC sequence is the TD-OCC sequence corresponding to any antenna port in the antenna port under the reference signal configuration corresponding to the first antenna port indication table, and each value in the second value set is a positive integer.

9. The method according to any one of claims 1 to 4, characterized in that: The multiple antenna ports in the first port group belong to the same CDM group, and the multiple antenna ports in the first port group correspond to the same TD-OCC sequence.

10. The method according to claim 9, characterized in that The difference between the number of ports of the at least one first port and the number of ports of the at least one second port is a third value, the third value is in a third value set, the minimum value in the third value set is greater than or equal to 1, and the maximum value in the third value set is less than half of the number of antenna ports corresponding to the first TD-OCC sequence in the first CDM group, the first CDM group is any one of the CDM groups under the reference signal configuration corresponding to the first antenna port indication table, the first TD-OCC sequence is the TD-OCC sequence corresponding to any port in the first CDM group, and each value in the third value set is a positive integer.

11. The method according to any one of claims 1 to 10, characterized in that: The number of ports of the multiple antenna ports in the first port group is greater than or equal to 3.

12. The method according to any one of claims 1 to 11, characterized in that: The first antenna port indication table also includes Y groups of second antenna port information, the second antenna port information indicates that the multiple orthogonal antenna ports in the second port group belong to multiple CDM groups, and Y is a positive integer; the orthogonal antenna ports in the third port set except the multiple antenna ports in the second port group are not used for PDSCH transmission; wherein, The third port set includes orthogonal antenna ports supported by the reference signal configuration, or The third port set includes orthogonal antenna ports in the plurality of CDM groups, or, The third port set includes orthogonal antenna ports in the multiple CDM groups having the same TD-OCC sequence as that of the multiple orthogonal antenna ports in the second port group.

13. The method according to any one of claims 1 to 11, characterized in that: The first antenna port indication table also includes Z groups of third antenna port information, wherein the multiple orthogonal antenna ports in the third port group indicated by the third antenna port information correspond to multiple groups of TD-OCC sequences, and Z is a positive integer; the antenna ports in the fourth port set except the multiple orthogonal antenna ports in the third port group are not used for PDSCH transmission; wherein, The fourth port set includes orthogonal antenna ports supported by the reference signal configuration, or, The fourth port set includes orthogonal antenna ports in the plurality of CDM groups.

14. The method according to any one of claims 1 to 13, characterized in that: The four long frequency domain mask sequences corresponding to each of the at least one first port and the at least one second port are orthogonal, the four long frequency domain mask sequences include frequency domain masks corresponding to 4 consecutive subcarriers in a CDM group, and adjacent frequency domain mask symbols in the four long frequency domain mask sequences corresponding to each second port of the at least one second port are orthogonal.

15. The method according to claim 14, characterized in that The frequency domain mask sequence of the at least one second port includes {+1, +1, +1, +1} and / or {+1, -1, +1, -1}.

16. The method according to claim 14 or 15, characterized in that The frequency domain mask sequence of the at least one first port includes {+1, +1, -1, -1} and / or {+1, -1, -1, +1}.

17. The method according to any one of claims 1 to 16, characterized in that: The first antenna port information is further used to indicate one or more of the following: an index of the first antenna port information, a number of reference signal CDM groups without data, and a number of preamble symbols.

18. The method according to any one of claims 2 to 10, characterized in that: The first length of the reference signal configuration indication is 2, and the first length is the maximum length of the reference signal corresponding to the first antenna port indication table in the time domain.

19. The method according to any one of claims 1 to 18, characterized in that: The method further comprises: Communicate according to the port group indicated by the first group of antenna port information.

20. A communication method, characterized in that: The method comprises: Sending first indication information to a first terminal device, where the first indication information indicates a first antenna port indication table, where the first antenna port indication table includes X groups of first antenna port information, where X is a positive integer, and the first port group indicated by the first antenna port information includes at least one first port and at least one second port, the number of ports of the at least one first port is greater than the number of ports of the at least one second port, the at least one first port is located in a first port set, the at least one second port is located in a second port set, and the port index of any antenna port in the first port set is greater than the port index of any antenna port in the second port set, and the maximum port index in the second port set is less than half of the number of antenna ports supported under the reference signal configuration corresponding to the first antenna port indication table; Send second indication information to the first terminal device, where the second indication information indicates a first group of antenna port information, and the first antenna port indication table includes the first group of antenna port information.

21. The method according to claim 20, characterized in that The first antenna port indication table further includes K groups of fourth antenna port information, where the fourth antenna port information is used to determine a first layer number combination with at least one group of first antenna port information, where the first layer number combination is used to configure antenna ports for multiple terminal devices, where the multiple terminal devices include the first terminal device, and K is a positive integer; The antenna ports in at least one first port group indicated by the at least one set of first antenna port information do not overlap with the ports in the fourth port group indicated by the fourth antenna port information, and the ports in the at least one first port group do not overlap.

22. The method according to claim 21, characterized in that The first layer number combination includes multiple groups of port numbers, and the multiple groups of port numbers include the port number of at least one first port group and the port number of the fourth port group.

23. The method according to claim 22, characterized in that The number of reference signal code division multiplexing (CDM) groups without data respectively indicated by the at least one group of first antenna port information is the same as the number of CDM groups without data indicated by the fourth antenna port information.

24. The method according to claim 23, characterized in that The antenna ports in the at least one first port group and the antenna ports in the fourth port group are located in the same CDM group.

25. The method according to any one of claims 20 to 24, characterized in that: The first indication information includes the reference signal configuration, the reference signal configuration is associated with the first antenna port indication table, the reference signal configuration includes a first configuration type, a first length and first enhancement information, wherein the first configuration type is the configuration type of the reference signal corresponding to the first antenna port indication table, the first length is the maximum length of the reference signal corresponding to the first antenna port indication table in the time domain, and the first enhancement information indicates that the first configuration type is an enhanced type.

26. The method according to any one of claims 20 to 25, characterized in that: The number of ports in the first port set is equal to the number of ports in the second port set.

27. The method according to any one of claims 20 to 25, characterized in that: The port index of the first port is greater than 0.

28. The method according to any one of claims 20 to 27, characterized in that: The multiple antenna ports in the first port group belong to the same CDM group.

29. The method according to claim 28, characterized in that The difference between the number of ports of the at least one first port and the number of ports of the at least one second port is a first numerical value, the first numerical value is in a first numerical value set, the minimum numerical value in the first numerical value set is greater than or equal to 1, the maximum numerical value in the first numerical value set is less than half of the number of antenna ports included in the first CDM group, the first CDM group is any one of the CDM groups under the reference signal configuration corresponding to the first antenna port indication table, and each numerical value in the first numerical value set is a positive integer.

30. The method according to any one of claims 20 to 27, characterized in that The multiple antenna ports in the first port group correspond to the same time division orthogonal cover code TD-OCC sequence.

31. The method according to claim 30, characterized in that The difference between the number of ports of the at least one first port and the number of the at least one second port is a second value, the second value is in a second value set, the minimum value in the second value set is greater than or equal to 1, the maximum value in the second value set is less than half of the number of antenna ports corresponding to the first TD-OCC sequence, the first TD-OCC sequence is the TD-OCC sequence corresponding to any antenna port in the antenna port under the reference signal configuration corresponding to the first antenna port indication table, and each value in the second value set is a positive integer.

32. The method according to any one of claims 20 to 27, characterized in that: The multiple antenna ports in the first port group belong to the same CDM group, and the multiple antenna ports in the first port group correspond to the same TD-OCC sequence.

33. The method according to claim 32, characterized in that The difference between the number of ports of the at least one first port and the number of ports of the at least one second port is a third value, the third value is in a third value set, the minimum value in the third value set is greater than or equal to 1, and the maximum value in the third value set is less than half of the number of antenna ports corresponding to the first TD-OCC sequence in the first CDM group, the first CDM group is any one of the CDM groups under the reference signal configuration corresponding to the first antenna port indication table, the first TD-OCC sequence is the TD-OCC sequence corresponding to any port in the first CDM group, and each value in the third value set is a positive integer.

34. The method according to any one of claims 20 to 33, characterized in that The four long frequency domain mask sequences corresponding to each of the at least one first port and the at least one second port are orthogonal, the four long frequency domain mask sequences include frequency domain masks corresponding to 4 consecutive subcarriers in a CDM group, and adjacent frequency domain mask symbols in the four long frequency domain mask sequences corresponding to each second port of the at least one second port are orthogonal.

35. The method according to claim 34, characterized in that The frequency domain mask sequence of the at least one second port includes {+1, +1, +1, +1} and / or {+1, -1, +1, -1}.

36. The method according to claim 34 or 35, characterized in that The frequency domain mask sequence of the at least one first port includes {+1, +1, -1, -1} and / or {+1, -1, -1, +1}.

37. The method according to any one of claims 20 to 36, characterized in that The first length of the reference signal configuration indication is 2, and the first length is the maximum length of the reference signal corresponding to the first antenna port indication table in the time domain.

38. The method according to any one of claims 20 to 37, characterized in that The first antenna port information is further used to indicate one or more of the following: an index of the first antenna port information, a number of reference signal CDM groups without data, and a number of preamble symbols.

39. A communication device, characterized in that: The communication device includes a transceiver module and a processing module. The transceiver module is used to perform the receiving behavior or the sending behavior in the method according to any one of claims 1 to 19; The processing module is used to execute the processing behavior in the method according to any one of claims 1-19.

40. A communication device, characterized in that: The communication device includes a transceiver module and a processing module. The transceiver module is used to perform the receiving behavior or the sending behavior in the method according to any one of claims 20 to 38; The processing module is used to execute the processing behavior in the method described in any one of claims 20-38.

41. A communication device, characterized in that: The communication device comprises a processor; the processor is configured to run a computer program or instructions so that the communication device executes the method according to any one of claims 1 to 19.

42. A communication device, characterized in that: The communication device comprises a processor; the processor is configured to run a computer program or instructions so as to enable the communication device to perform the method according to any one of claims 20 to 38.

43. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions or programs. When the computer instructions or programs are executed on a computer, the method according to any one of claims 1 to 19 is executed.

44. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions or programs, and when the computer instructions or programs are executed on a computer, the method according to any one of claims 20 to 38 is executed.

45. A chip, characterized in that: include: A processor, wherein the processor is coupled to a memory, wherein the memory is used to store programs or instructions, and when the programs or instructions are executed by the processor, the chip executes the method as described in any one of claims 1-19.

46. ​​A chip, characterized in that: include: A processor, the processor is coupled to a memory, the memory is used to store programs or instructions, when the program or instructions are executed by the processor, the chip executes the method as described in any one of claims 20-38.

Images