Information indication method, device and readable storage medium

Abstract

Embodiments of the present application disclose a kind of information indication method, device and readable storage medium, the method includes: base station sends first indication information and second indication information, first indication information at least one value, for indicating rank and the combination of multiple TPMI indexes, second indication information indicates DMRS port index, when the value of second indication information is the value in first set, the DMRS port index is associated with the first combination in multiple combinations, when the value of second indication information is the value in second set, the DMRS port index is associated with the second combination in multiple combinations;UE jointly these two indication information determines the unique rank, TPMI index and corresponding DMRS port index indicated by base station. With the embodiments of the present application, the combination indication of rank and TPMI index greater than 4 antenna ports and the indication of DMRS port index can be supported, and the indication overhead can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, and in particular to an information indication method and device and a readable storage medium. BACKGROUND

[0002] For uplink transmission, the sending behavior of a terminal device is scheduled by a network device. The network device can inform the terminal device of the number of transmission streams (also referred to as the number of transmission layers, the number of spatial layers or rank), a transmitted precoding matrix indicator (TPMI) index, and a corresponding dedicated demodulation reference signal (DMRS) port index through indication information, where the TPMI index is used to identify a precoding matrix used for uplink transmission, and the DMRS port index is used to identify a DMRS port, one DMRS port corresponding to one spatial layer. For multiple input multiple output (MIMO) transmission with a transmission layer number of R, the number of required DMRS ports is R.

[0003] In a new radio access technology (NR / 5G) protocol, a terminal device can only support uplink transmission with a maximum of 4 layers (i.e., rank = 4). However, with further improvement of terminal device capability, terminal devices with more than 4 transmit antennas (such as 8 transmit antennas) are increasingly common. A terminal device with more than 4 antennas can support a transmission layer number (i.e., rank) greater than 4, such as uplink transmission with a maximum of 8 layers (i.e., rank = 8) for a terminal device with 8 antennas. Therefore, in order to support uplink transmission with more than 4 layers, the indication of a TPMI index and a DMRS port index for more than 4 antenna ports needs to be explored. SUMMARY

[0004] Embodiments of the present application provide an information indication method and device and a readable storage medium, which can support combined indication of a transmission layer number and a TPMI index for more than 4 antenna ports and indication of a DMRS port index, such as combined indication of a transmission layer number (a maximum of 8 layers) and a TPMI index for 8 antenna ports and indication of a DMRS port index for 8 antenna ports, and can reduce indication overhead.

[0005] The present application will be described from different aspects below. It should be understood that the embodiments and advantages of the different aspects below can be mutually referred to.

[0006] In a first aspect, the present application provides an information indication method, which comprises: a network device sending first indication information and second indication information. The first indication information is used to indicate a combination of a transmission rank and a TPMI index, and the transmission rank and the TPMI index correspond to each other, for example, the transmission rank and the TPMI index correspond to the same rank of a precoding matrix. The first indication information has at least a first value, and the first value indicates a plurality of combinations of a transmission rank and a TPMI index, one combination being a transmission rank and a TPMI index corresponding to the transmission rank. The plurality of combinations includes a first combination and a second combination. The second indication information is used to indicate a DMRS port index. The value of the second indication information belongs to one of a plurality of sets, and the plurality of sets at least includes a first set and a second set. When the value of the second indication information is a value in the first set, the DMRS port index indicated by the second indication information is associated with the first combination, for example, the number of DMRS port indexes indicated by the second indication information is the same as the transmission rank (i.e., rank) in the first combination. When the value of the second indication information is a value in the second set, the DMRS port index indicated by the second indication information is associated with the second combination, for example, the number of DMRS port indexes indicated by the second indication information is the same as the transmission rank (i.e., rank) in the second combination.

[0007] The present application makes the first indication information have at least one value, which indicates a plurality of combinations of a transmission rank and a TPMI index, not only can support the combination indication of a transmission rank (maximum 8 layers) and a TPMI index of more than 4 antenna ports (such as 8 antenna ports), but also reduces the indication overhead compared with the mode of one value indicating one combination of a transmission rank and a TPMI index. The present application also encodes the DMRS port indexes corresponding to two different transmission ranks in one table, and uses different values to indicate the DMRS port indexes corresponding to different transmission ranks, not only can support the indication of DMRS port indexes of more than 4 antenna ports (such as 8 antenna ports), but also does not need to additionally increase 4 DMRS port index tables, does not increase the bit overhead of DMRS port indication, and can reduce the redundant indication bits in the DMRS port index table.

[0008] In a second aspect, the present application provides an information indication method, which comprises: a terminal device receiving first indication information and second indication information, and determining a combination from a plurality of combinations of a transmission layer number and a TPMI index according to a value of the second indication information. The first indication information is used to indicate a combination of a transmission layer number and a TPMI index, and the transmission layer number and the TPMI index correspond, for example, the number of layers of a precoding matrix identified by the transmission layer number and the TPMI index is the same. The first indication information has at least a first value, and the first value indicates a plurality of combinations of a transmission layer number and a TPMI index, and a transmission layer number and a TPMI index corresponding to the transmission layer number are a combination. The plurality of combinations includes a first combination and a second combination. The second indication information is used to indicate a DMRS port index. The value of the second indication information belongs to one of a plurality of sets, and the plurality of sets at least includes a first set and a second set. When the second indication information is a value in the first set, the DMRS port index indicated by the second indication information is associated with the first combination, for example, the number of DMRS port indexes indicated by the second indication information is the same as the transmission layer number (i.e., rank) in the first combination; when the second indication information is a value in the second set, the DMRS port index indicated by the second indication information is associated with the second combination, for example, the number of DMRS port indexes indicated by the second indication information is the same as the transmission layer number (i.e., rank) in the second combination.

[0009] The terminal device of the embodiments of the present application determines one or more rank values and the TPMI indexes corresponding to the one or more rank values through the value of the first indication information, and then determines a specific (or unique) rank value and a DMRS port index according to the value of the second indication information, and further determines the TPMI index corresponding to the rank value. Not only can it support the indication of the combination of the transmission layer number and the TPMI index and the indication of the DMRS port index for more than 4 antenna ports (such as 8 antenna ports), but also can reduce the indication overhead, and further can support uplink transmission of more than 4 layers, thereby improving the transmission performance.

[0010] In combination with the first aspect or the second aspect, in a possible implementation manner, the transmission layer number in the first combination is one of 1, 2, 3, and 4, and the transmission layer number in the second combination is one of 5, 6, 7, and 8. In other words, there is a corresponding relationship between the transmission layer number in the first combination and the transmission layer number in the second combination.

[0011] Optionally, when the transmission layer number in the first combination is 1, the transmission layer number in the second combination is 5; when the transmission layer number in the first combination is 2, the transmission layer number in the second combination is 6; when the transmission layer number in the first combination is 3, the transmission layer number in the second combination is 7; and when the transmission layer number in the first combination is 4, the transmission layer number in the second combination is 8.

[0012] Optionally, when the number of transmission layers in the first combination is 1, the number of transmission layers in the second combination is 8; when the number of transmission layers in the first combination is 2, the number of transmission layers in the second combination is 7; when the number of transmission layers in the first combination is 3, the number of transmission layers in the second combination is 6; and when the number of transmission layers in the first combination is 4, the number of transmission layers in the second combination is 5.

[0013] The application establishes a correspondence between rank=1-4 and rank=5-8, and based on the correspondence, the first indication information has at least one value indicating a plurality of combinations of the number of transmission layers and the TPMI index; and the application encodes DMRS port indexes corresponding to two ranks having the correspondence in a table, and uses different values to indicate DMRS port indexes corresponding to different ranks; not only can the combination indication of the number of transmission layers (from 1 layer to 8 layers) and the TPMI index of 8 antenna ports and the DMRS port index indication of 8 antenna ports be supported, but also the indication overhead can be reduced without affecting compatibility.

[0014] In combination with the first aspect or the second aspect, in a possible implementation, the first indication information and the second indication information are carried in downlink control information (DCI) signaling. For example, the first indication information can be a precoding information and number of layers field in DCI signaling, used to indicate the combination of the number of transmission layers (i.e., rank) and the TPMI index corresponding to the number of transmission layers; and the second indication information can be an antenna port field in DCI signaling, used to indicate the DMRS port index.

[0015] In a third aspect, the application provides a communication apparatus, specifically a network device or a chip therein, used to execute the method in the first aspect or any possible implementation of the first aspect. The communication apparatus includes units having the method in the first aspect or any possible implementation of the first aspect.

[0016] In a fourth aspect, the application provides a communication apparatus, specifically a terminal device or a chip therein, used to execute the method in the second aspect or any possible implementation of the second aspect. The communication apparatus includes units having the method in the second aspect or any possible implementation of the second aspect.

[0017] In the third aspect or the fourth aspect, the communication device can include a transceiver and a processing unit. The specific description of the transceiver and the processing unit can also refer to the device embodiments shown below. The beneficial effects of the third aspect to the fourth aspect described above can refer to the relevant description of the first aspect and the second aspect described above, and will not be repeated here.

[0018] In a fifth aspect, the present application provides an information indication method, which includes: a network device sending first indication information and third indication information. The first indication information is used to indicate the combination of the transmission layer number and the TPMI index, and the transmission layer number and the TPMI index correspond, such as the number of layers of the precoding matrix identified by the transmission layer number and the TPMI index is the same. The first indication information has at least a first value, which indicates a plurality of combinations of the transmission layer number and the TPMI index, and one transmission layer number and the TPMI index corresponding to this transmission layer number is one combination. The third indication information indicates one combination in the plurality of combinations.

[0019] The present application makes the first indication information have at least one value, which indicates a plurality of combinations of the transmission layer number and the TPMI index, and indicates which combination in the plurality of combinations is allocated to the terminal device by the third indication information; not only can support the combination indication of the transmission layer number and the TPMI index greater than 4 antenna ports, reduce the indication overhead, but also can support the uplink transmission greater than 4 layers, and further can improve the transmission performance.

[0020] In combination with the fifth aspect, in a possible implementation manner, the plurality of combinations includes a first combination and a second combination. The third indication information can indicate the first combination in the plurality of combinations by indicating that one of the two codewords is enabled, and the third indication information can indicate the second combination in the plurality of combinations by indicating that both of the two codewords are enabled.

[0021] Optionally, the third indication information is one or more of a modulation and coding scheme (MCS) field, a redundancy version field, and a new data indicator field in the DCI signaling. For example, the third indication information is the MCS field and the redundancy version field. For example, a code word in the DCI signaling is disabled by taking a preset value or a special value in the MCS field and the redundancy version field corresponding to the code word.

[0022] In a possible implementation of the fifth aspect, the method further includes: the network device sending second indication information. The second indication information is used to indicate DMRS port indexes. The value of the second indication information belongs to one of a plurality of sets, and the plurality of sets at least include the first set and the second set. When the value of the second indication information is a value in the first set, the DMRS port indexes indicated by the second indication information are associated with the first combination in the plurality of combinations. For example, the number of the DMRS port indexes indicated by the second indication information is the same as the number of ranks in the first combination. When the value of the second indication information is a value in the second set, the DMRS port indexes indicated by the second indication information are associated with the second combination in the plurality of combinations. For example, the number of the DMRS port indexes indicated by the second indication information is the same as the number of ranks in the second combination.

[0023] The present application encodes the DMRS port indexes corresponding to two different ranks in a table, and uses different values to indicate the DMRS port indexes corresponding to different ranks. The present application can support the indication of DMRS port indexes greater than 4 antenna ports, does not need to additionally increase 4 DMRS port index tables, does not increase the bit overhead of DMRS port indication, and can reduce the redundant indication bits in the DMRS port index table.

[0024] In a sixth aspect, the present application provides an information indication method, which comprises: a terminal device receiving first indication information and third indication information, and determining a combination from a plurality of combinations of a transmission layer number and a TPMI index according to the third indication information. The first indication information is used to indicate a combination of a transmission layer number and a TPMI index, and the transmission layer number and the TPMI index correspond, for example, the number of layers of a precoding matrix identified by the transmission layer number and the TPMI index is the same. The first indication information has at least a first value, and the first value indicates a plurality of combinations of a transmission layer number and a TPMI index, and a transmission layer number and a TPMI index corresponding to the transmission layer number are a combination. The third indication information indicates one combination from the plurality of combinations.

[0025] The terminal device of the present application determines one or more rank values and the TPMI index corresponding to the one or more rank values through the value of the first indication information, and determines a unique rank value and the TPMI index corresponding to the rank value according to the indication of the third indication information. Not only can the combination indication of the transmission layer number (maximum 8 layers) and the TPMI index greater than 4 antenna ports be supported, but also the indication overhead can be reduced, and the uplink transmission greater than 4 layers can be supported, thereby improving the transmission performance.

[0026] In combination with the sixth aspect, in a possible implementation manner, the plurality of combinations includes a first combination and a second combination. The terminal device determines a combination from the plurality of combinations of a transmission layer number and a TPMI index according to the third indication information, which comprises: when the third indication information indicates that one of the two codewords is enabled, the terminal device determines the first combination from the plurality of combinations; and when the third indication information indicates that the two codewords are both enabled, the terminal device determines the second combination from the plurality of combinations.

[0027] Optionally, the third indication information is one or more of the MCS field, the redundancy version field and the new data indication field in the DCI signaling, for example, the third indication information is the MCS field and the redundancy version field. It can be understood that the DCI signaling contains the MCS field, the redundancy version field and the new data indication field corresponding to the two codewords respectively. When the MCS field corresponding to a certain codeword in the DCI signaling takes a special value (such as 26) and the redundancy version field corresponding to the codeword takes a special value (such as 1), it is used to jointly indicate that the codeword is disabled; and when the MCS field corresponding to a certain codeword in the DCI signaling is not 26 or the redundancy version field corresponding to the codeword is not 1, it indicates that the codeword is enabled, at this time the MCS field corresponding to the codeword is used to indicate the scheduling MCS index, and the redundancy version field corresponding to the codeword is used to indicate the redundancy version information of the coding corresponding to the scheduling data.

[0028] With reference to the sixth aspect, in a possible implementation manner, the method further includes: receiving, by the terminal device, second indication information. The second indication information is used to indicate DMRS port indexes. The value of the second indication information belongs to one of a plurality of sets, and the plurality of sets at least include the first set and the second set. When the value of the second indication information is a value in the first set, the DMRS port indexes indicated by the second indication information are associated with the first combination in the plurality of combinations, for example, the number of the DMRS port indexes indicated by the second indication information is the same as the number of ranks in the first combination. When the value of the second indication information is a value in the second set, the DMRS port indexes indicated by the second indication information are associated with the second combination in the plurality of combinations, for example, the number of the DMRS port indexes indicated by the second indication information is the same as the number of ranks in the second combination.

[0029] With reference to the fifth aspect or the sixth aspect, in a possible implementation manner, the number of ranks in the first combination is one of 1, 2, 3, and 4, and the number of ranks in the second combination is one of 5, 6, 7, and 8. In other words, the number of ranks in the first combination and the number of ranks in the second combination have a corresponding relationship.

[0030] Optionally, when the number of ranks in the first combination is 1, the number of ranks in the second combination is 5; when the number of ranks in the first combination is 2, the number of ranks in the second combination is 6; when the number of ranks in the first combination is 3, the number of ranks in the second combination is 7; and when the number of ranks in the first combination is 4, the number of ranks in the second combination is 8.

[0031] Optionally, when the number of ranks in the first combination is 1, the number of ranks in the second combination is 8; when the number of ranks in the first combination is 2, the number of ranks in the second combination is 7; when the number of ranks in the first combination is 3, the number of ranks in the second combination is 6; and when the number of ranks in the first combination is 4, the number of ranks in the second combination is 5.

[0032] With reference to the fifth aspect or the sixth aspect, in a possible implementation manner, the first indication information is carried in DCI signaling. For example, the first indication information can be a precoding information and rank field in the DCI signaling, which is used to indicate the combination of the number of ranks (i.e., rank) and the TPMI index corresponding to the number of ranks.

[0033] The seventh aspect provides a communication apparatus, specifically a network device or a chip therein, which is used to execute the method in the fifth aspect or any possible implementation manner of the fifth aspect. The communication apparatus includes units that execute the method in the fifth aspect or any possible implementation manner of the fifth aspect.

[0034] In an eighth aspect, the present application provides a communication apparatus, specifically a terminal device or a chip thereof, which is configured to execute the method in the sixth aspect or any possible implementation manner of the sixth aspect. The communication apparatus comprises units configured to execute the method in the sixth aspect or any possible implementation manner of the sixth aspect.

[0035] In the seventh aspect or the eighth aspect, the communication apparatus can comprise a transceiver unit and a processing unit. The specific description of the transceiver unit and the processing unit can also be referred to the apparatus embodiment shown below. The beneficial effects of the above-mentioned seventh aspect to the eighth aspect can be referred to the foregoing description of the fifth aspect and the sixth aspect, and will not be described here.

[0036] In a ninth aspect, the present application provides an information indication method, which comprises: a network device sending fourth indication information and third indication information. The fourth indication information is used to indicate DMRS port indexes. The fourth indication information has at least a second value, which indicates a plurality of DMRS port index groups. Each DMRS port index group comprises at least one DMRS port index. The third indication information indicates one DMRS port index group in the plurality of DMRS port index groups.

[0037] The present application makes the fourth indication information have at least one value, which indicates a plurality of DMRS port index groups (each DMRS port index group comprises at least one DMRS port index), and indicates through the third indication information which DMRS port index group in the plurality of DMRS port index groups is allocated to the terminal device by the network device. Not only can the DMRS port index indication of more than 4 antenna ports be supported, but also the DMRS port index table does not need to be additionally increased, and the additional indication information overhead is not introduced, the redundant indication bits can be reduced, the uplink transmission of more than 4 layers can be supported, and the transmission performance can be improved.

[0038] In combination with the ninth aspect, in a possible implementation manner, the plurality of DMRS port index groups comprises a first DMRS port index group and a second DMRS port index group. The third indication information indicates the first DMRS port index group in the plurality of DMRS port index groups by indicating that one code word of two code words is enabled, and indicates the second DMRS port index group in the plurality of DMRS port index groups by indicating that both of the two code words are enabled.

[0039] Optionally, the third indication information is carried in DCI signaling. The implementation manner of the third indication information can be referred to the description of the fifth aspect or the sixth aspect, or the description of the embodiment below, which will not be described here.

[0040] In a possible implementation manner, the method further includes: the network device sending first indication information. The first indication information is used to indicate a combination of a transmission layer number and a TPMI index, and the transmission layer number and the TPMI index correspond, for example, the transmission layer number and the TPMI index correspond in a number of layers of a precoding matrix identified by the transmission layer number and the TPMI index. The first indication information has at least a first value, and the first value indicates a plurality of combinations of a transmission layer number and a TPMI index, one combination of one transmission layer number and a TPMI index corresponding to the transmission layer number. The plurality of combinations includes a first combination and a second combination. The first combination is associated with a first DMRS port index group in the plurality of DMRS port index groups, and the second combination is associated with a second DMRS port index group in the plurality of DMRS port index groups.

[0041] In a possible implementation manner, the method further includes: the network device sending first indication information. The first indication information is used to indicate a combination of a transmission layer number and a TPMI index, and the transmission layer number and the TPMI index correspond, for example, the transmission layer number and the TPMI index correspond in a number of layers of a precoding matrix identified by the transmission layer number and the TPMI index. The first indication information has at least a first value, and the first value indicates a plurality of combinations of a transmission layer number and a TPMI index, one combination of one transmission layer number and a TPMI index corresponding to the transmission layer number. The plurality of combinations includes a first combination and a second combination. The first combination is associated with a first DMRS port index group in the plurality of DMRS port index groups, and the second combination is associated with a second DMRS port index group in the plurality of DMRS port index groups.

[0042] The terminal device determines one or more DMRS port index groups through a value of the fourth indication information, and determines a DMRS port index group according to indication of the third indication information. Not only can the DMRS port index indication of more than 4 antenna ports be supported, but also no additional DMRS port index table needs to be added, no additional indication information overhead is introduced, redundancy indication bits are reduced, and uplink transmission of more than 4 layers can be supported, thereby improving transmission performance.

[0043] In a possible implementation manner, the plurality of DMRS port index groups includes a first DMRS port index group and a second DMRS port index group. The terminal device determines a DMRS port index group from the plurality of DMRS port index groups according to the third indication information, including: when the third indication information indicates that one of two codewords is enabled, the terminal device determines the first DMRS port index group from the plurality of DMRS port index groups; and when the third indication information indicates that both of the two codewords are enabled, the terminal device determines the second DMRS port index group from the plurality of DMRS port index groups.

[0044] Optionally, the third indication information is carried in DCI signaling, and the implementation of the third indication information can refer to the description of the fifth or sixth aspect or the description of the embodiments below, which will not be described here.

[0045] In combination with the tenth aspect, in a possible implementation, the method further includes: the terminal device receives first indication information, and determines a combination from a plurality of combinations of a transmission layer number and a TPMI index indicated by the first indication information according to the third indication information. The first indication information is used to indicate a combination of a transmission layer number and a TPMI index, and the transmission layer number and the TPMI index correspond, for example, the number of layers of the precoding matrix identified by the transmission layer number and the TPMI index is the same. The first indication information has at least a first value, and the first value indicates a plurality of combinations of a transmission layer number and a TPMI index, and a transmission layer number and a TPMI index corresponding to the transmission layer number are a combination. The plurality of combinations includes a first combination and a second combination. The first combination is associated with a first DMRS port index group in the plurality of DMRS port index groups, and the second combination is associated with a second DMRS port index group in the plurality of DMRS port index groups.

[0046] Optionally, when the third indication information indicates that one of the two codewords is enabled, the terminal device determines the first combination from the plurality of combinations; and when the third indication information indicates that both of the two codewords are enabled, the terminal device determines the second combination from the plurality of combinations.

[0047] The present application makes the first indication information have at least one value, which indicates a plurality of combinations of a transmission layer number and a TPMI index, and indicates by the third indication information which combination of the plurality of combinations is allocated to the terminal device by the network device; can support the indication of the combination of the transmission layer number and the TPMI index greater than 4 antenna ports, and reduce the indication overhead.

[0048] In combination with the ninth aspect or the tenth aspect, in a possible implementation, the transmission layer number in the first combination is one of 1, 2, 3, and 4, and the transmission layer number in the second combination is one of 5, 6, 7, and 8. In other words, the transmission layer number in the first combination and the transmission layer number in the second combination have a corresponding relationship.

[0049] Optionally, when the transmission layer number in the first combination is 1, the transmission layer number in the second combination is 5; when the transmission layer number in the first combination is 2, the transmission layer number in the second combination is 6; when the transmission layer number in the first combination is 3, the transmission layer number in the second combination is 7; and when the transmission layer number in the first combination is 4, the transmission layer number in the second combination is 8.

[0050] Optionally, when the number of transmission layers in the first combination is 1, the number of transmission layers in the second combination is 8; when the number of transmission layers in the first combination is 2, the number of transmission layers in the second combination is 7; when the number of transmission layers in the first combination is 3, the number of transmission layers in the second combination is 6; when the number of transmission layers in the first combination is 4, the number of transmission layers in the second combination is 5.

[0051] With reference to the ninth aspect or the tenth aspect, in a possible implementation manner, the fourth indication information is carried in DCI signaling. For example, the fourth indication information can be an antenna port field in the DCI signaling, used to indicate a DMRS port index.

[0052] In a twelfth aspect, the present application provides a communication apparatus, specifically a terminal device or a chip therein, configured to execute the method in the tenth aspect or any possible implementation manner of the tenth aspect. The communication apparatus comprises units configured to execute the method in the tenth aspect or any possible implementation manner of the tenth aspect.

[0053] In a twelfth aspect, the present application provides a communication apparatus, specifically a terminal device or a chip therein, configured to execute the method in the tenth aspect or any possible implementation manner of the tenth aspect. The communication apparatus comprises units configured to execute the method in the tenth aspect or any possible implementation manner of the tenth aspect.

[0054] In the eleventh aspect or the twelfth aspect, the communication apparatus can comprise a transceiver unit and a processing unit. For specific description of the transceiver unit and the processing unit, reference can be made to the apparatus embodiments shown below. The beneficial effects of the eleventh aspect to the twelfth aspect can refer to the related description of the ninth aspect and the tenth aspect, which will not be described here.

[0055] In a thirteenth aspect, the present application provides an information indication method, which comprises: a network device sending fifth indication information and second indication information. The fifth indication information is used to indicate a sounding reference signal (SRS) resource index. The fifth indication information has at least a first value, and the first value indicates a plurality of SRS resource index groups. Each SRS resource index group comprises at least one SRS resource index. The plurality of SRS resource index groups comprise a first SRS resource index group and a second SRS resource index group. The first SRS resource index group contains a number of SRS resource indexes equal to a first number of transmission layers, and the second SRS resource index group contains a number of SRS resource indexes equal to a second number of transmission layers. The second indication information is used to indicate a DMRS port index. The value of the second indication information belongs to one of a plurality of sets, and the plurality of sets at least comprise a first set and a second set. When the second indication information is a value in the first set, the DMRS port index indicated by the second indication information is associated with the first number of transmission layers. For example, the number of DMRS port indexes indicated by the second indication information is the same as the first number of transmission layers (i.e., rank). When the second indication information is a value in the second set, the DMRS port index indicated by the second indication information is associated with the second number of transmission layers. For example, the number of DMRS port indexes indicated by the second indication information is the same as the second number of transmission layers (i.e., rank).

[0056] The present application makes the fifth indication information have at least one value, which indicates a plurality of SRS resource index groups (each SRS resource index group comprises at least one SRS resource index). This not only can support SRS resource index indication of 8 antenna ports, support non-codebook transmission of a maximum of 8 layers, and further improve transmission performance, but also reduces indication overhead compared with a mode in which one value indicates one SRS resource index group. The present application also encodes DMRS port indexes corresponding to two different numbers of transmission layers in one table, and uses different values to indicate DMRS port indexes corresponding to different numbers of transmission layers. This not only can support DMRS port index indication of more than 4 antenna ports, but also does not need to additionally increase 4 DMRS port index tables, does not increase bit overhead of DMRS port indication, and can reduce redundant indication bits in the DMRS port index table.

[0057] In a fourteenth aspect, the present application provides an information indication method, which comprises: a terminal device receiving fifth indication information and second indication information, and determining a SRS resource index group from a plurality of SRS resource index groups indicated by the fifth indication information according to a value of the second indication information. The fifth indication information is used to indicate SRS resource indexes, and the fifth indication information has at least a first value, which indicates a plurality of SRS resource index groups, and each SRS resource index group includes at least one SRS resource index. The plurality of SRS resource index groups includes a first SRS resource index group and a second SRS resource index group. The first SRS resource index group contains a number of SRS resource indexes equal to a first number of transmission layers, and the second SRS resource index group contains a number of SRS resource indexes equal to a second number of transmission layers. The second indication information is used to indicate DMRS port indexes. The value of the second indication information belongs to one of a plurality of sets, and the plurality of sets includes at least a first set and a second set. When the value of the second indication information is in the first set, the DMRS port indexes indicated by the second indication information are associated with the first number of transmission layers, for example, the number of DMRS port indexes indicated by the second indication information is the same as the first number of transmission layers (i.e., rank). When the value of the second indication information is in the second set, the DMRS port indexes indicated by the second indication information are associated with the second number of transmission layers, for example, the number of DMRS port indexes indicated by the second indication information is the same as the second number of transmission layers (i.e., rank).

[0058] The terminal device of the present application determines one or more SRS resource index groups through the value of the fifth indication information, and then determines a specific (or unique) SRS resource index group according to the value of the second indication information, which can support SRS resource index indication of more than 4 SRS resources, thereby supporting non-codebook transmission of more than 4 layers and further improving transmission performance.

[0059] In combination with the thirteenth aspect or the fourteenth aspect, in a possible implementation manner, the first number of transmission layers is one of 1, 2, 3, and 4, and the second number of transmission layers is one of 5, 6, 7, and 8.

[0060] Optionally, the first number of transmission layers is one of 1, 2, 3, and 4, and the second number of transmission layers is one of 5, 6, 7, and 8. For example, when the first number of transmission layers is 1, the second number of transmission layers is 5; when the first number of transmission layers is 2, the second number of transmission layers is 6; when the first number of transmission layers is 3, the second number of transmission layers is 7; and when the first number of transmission layers is 4, the second number of transmission layers is 8.

[0061] Optionally, when the first number of transmission layers is 1, the second number of transmission layers is 8; when the first number of transmission layers is 2, the second number of transmission layers is 7; when the first number of transmission layers is 3, the second number of transmission layers is 6; and when the first number of transmission layers is 4, the second number of transmission layers is 5.

[0062] In a possible implementation manner of the thirteenth aspect or the fourteenth aspect, the fifth indication information and the second indication information can be carried in DCI signaling. For example, the fifth indication information can be an SRS resource indicator (SRI) field in the DCI signaling, used to indicate an SRS resource index; and the second indication information can be an antenna port field in the DCI signaling, used to indicate a DMRS port index.

[0063] In a fifteenth aspect, the present application provides a communication apparatus, specifically a network device or a chip therein, used to execute the method in the thirteenth aspect or any possible implementation manner of the thirteenth aspect. The communication apparatus includes units with functions of executing the method in the thirteenth aspect or any possible implementation manner of the thirteenth aspect.

[0064] In a sixteenth aspect, the present application provides a communication apparatus, specifically a terminal device or a chip therein, used to execute the method in the fourteenth aspect or any possible implementation manner of the fourteenth aspect. The communication apparatus includes units with functions of executing the method in the fourteenth aspect or any possible implementation manner of the fourteenth aspect.

[0065] In the fifteenth aspect or the sixteenth aspect, the communication apparatus can include a transceiver unit and a processing unit. The specific description of the transceiver unit and the processing unit can also be referred to the apparatus embodiment shown below. The beneficial effects of the fifteenth aspect to the sixteenth aspect can be referred to the foregoing description of the thirteenth aspect and the fourteenth aspect, which will not be described here.

[0066] In a seventeenth aspect, the present application provides an information indication method, including: a network device sending fifth indication information and third indication information. The fifth indication information is used to indicate an SRS resource index, and the fifth indication information has at least a first value, the first value indicating a plurality of SRS resource index groups, and each SRS resource index group includes at least one SRS resource index. The third indication information indicates one SRS resource index group in the plurality of SRS resource index groups.

[0067] The present application makes the fifth indication information have at least one value, the value indicating a plurality of SRS resource index groups (each SRS resource index group includes at least one SRS resource index), and indicates, through the third indication information, which SRS resource index group in the plurality of SRS resource index groups is allocated to the terminal device by the network device; not only can support SRS resource index indication of more than 4 antenna ports, support non-codebook transmission of more than 4 layers, and further improve the transmission performance; and compared with the mode of one value indicating one SRS resource index group, also reduces the indication overhead.

[0068] In a possible implementation of the seventeenth aspect, the plurality of SRS resource index groups includes a first SRS resource index group and a second SRS resource index group. The third indication information indicates the first SRS resource index group in the plurality of SRS resource index groups by indicating that one of the two code words is enabled, and indicates the second SRS resource index group in the plurality of SRS resource index groups by indicating that both of the two code words are enabled.

[0069] Optionally, the third indication information is carried in DCI signaling. The implementation of the third indication information can refer to the description of the fifth or sixth aspect, or refer to the description of the embodiments below, which are not described herein.

[0070] In a possible implementation of the seventeenth aspect, the method further includes: sending, by the network device, second indication information. The second indication information is used to indicate DMRS port indexes. The value of the second indication information belongs to one of a plurality of sets, and the plurality of sets at least include a first set and a second set. The second indication information is used to indicate DMRS port indexes. The value of the second indication information belongs to one of a plurality of sets, and the plurality of sets at least include a first set and a second set. When the value of the second indication information is a value in the first set, the DMRS port indexes indicated by the second indication information are associated with a first number of transmission layers, for example, the number of the DMRS port indexes indicated by the second indication information is the same as the first number of transmission layers (i.e., rank). When the value of the second indication information is a value in the second set, the DMRS port indexes indicated by the second indication information are associated with a second number of transmission layers, for example, the number of the DMRS port indexes indicated by the second indication information is the same as the second number of transmission layers (i.e., rank). The plurality of SRS resource index groups includes a first SRS resource index group and a second SRS resource index group. The first SRS resource index group contains a number of SRS resource indexes equal to the first number of transmission layers, and the second SRS resource index group contains a number of SRS resource indexes equal to the second number of transmission layers.

[0071] The present application encodes the DMRS port indexes corresponding to two different numbers of transmission layers in a table, uses different values to indicate the DMRS port indexes corresponding to different numbers of transmission layers, can support the indication of DMRS port indexes greater than 4 antenna ports, does not need to additionally increase 4 DMRS port index tables, does not increase the bit overhead of DMRS port indication, and can reduce the redundant indication bits in the DMRS port index table.

[0072] In an eighteenth aspect, the present application provides an information indication method, which comprises: a terminal device receiving fifth indication information and third indication information, and determining one SRS resource index group from a plurality of SRS resource index groups indicated by the fifth indication information according to the third indication information. The fifth indication information is used to indicate SRS resource indexes, and the fifth indication information has at least a first value, which indicates the plurality of SRS resource index groups, and each SRS resource index group includes at least one SRS resource index. The third indication information indicates one SRS resource index group in the plurality of SRS resource index groups.

[0073] The terminal device of the present application determines one or more SRS resource index groups through the value of the fifth indication information, and then determines one SRS resource index group according to the indication of the third indication information, which can support SRS resource index indication of more than 4 antenna ports, support non-codebook transmission of more than 4 layers, and further improve transmission performance.

[0074] In combination with the eighteenth aspect, in a possible implementation manner, the plurality of SRS resource index groups includes a first SRS resource index group and a second SRS resource index group. The terminal device determines one SRS resource index group from the plurality of SRS resource index groups indicated by the fifth indication information according to the third indication information, which comprises: when the third indication information indicates that one of two codewords is enabled, the terminal device determines the first SRS resource index group from the plurality of SRS resource index groups; and when the third indication information indicates that both of the two codewords are enabled, the terminal device determines the second SRS resource index group from the plurality of SRS resource index groups.

[0075] In a possible implementation manner of the eighteenth aspect, the method further includes: receiving, by the terminal device, second indication information. The value of the second indication information belongs to one of a plurality of sets, and the plurality of sets at least include the first set and the second set. The second indication information is used to indicate DMRS port indexes. The value of the second indication information belongs to one of a plurality of sets, and the plurality of sets at least include the first set and the second set. When the value of the second indication information is a value in the first set, the DMRS port indexes indicated by the second indication information are associated with the first number of transmission layers, for example, the number of the DMRS port indexes indicated by the second indication information is the same as the first number of transmission layers (rank). When the value of the second indication information is a value in the second set, the DMRS port indexes indicated by the second indication information are associated with the second number of transmission layers, for example, the number of the DMRS port indexes indicated by the second indication information is the same as the second number of transmission layers (rank). The plurality of SRS resource index groups include a first SRS resource index group and a second SRS resource index group. The first SRS resource index group contains SRS resource indexes with a number equal to the first number of transmission layers, and the second SRS resource index group contains SRS resource indexes with a number equal to the second number of transmission layers.

[0076] In a possible implementation manner of the seventeenth aspect or the eighteenth aspect, the first number of transmission layers is one of 1, 2, 3, and 4, and the second number of transmission layers is one of 5, 6, 7, and 8.

[0077] Optionally, the first number of transmission layers is one of 1, 2, 3, and 4, and the second number of transmission layers is one of 5, 6, 7, and 8. For example, when the first number of transmission layers is 1, the second number of transmission layers is 5; when the first number of transmission layers is 2, the second number of transmission layers is 6; when the first number of transmission layers is 3, the second number of transmission layers is 7; and when the first number of transmission layers is 4, the second number of transmission layers is 8.

[0078] Optionally, when the first number of transmission layers is 1, the second number of transmission layers is 8; when the first number of transmission layers is 2, the second number of transmission layers is 7; when the first number of transmission layers is 3, the second number of transmission layers is 6; and when the first number of transmission layers is 4, the second number of transmission layers is 5.

[0079] In a possible implementation manner of the seventeenth aspect or the eighteenth aspect, the fifth indication information is carried in DCI signaling. For example, the fifth indication information can be an SRS resource indication (SRI) field in the DCI signaling.

[0080] In a nineteenth aspect, the present application provides a communication apparatus, which is specifically a network device or a chip therein, for executing the method in the seventeenth aspect or any possible implementation manner of the seventeenth aspect. The communication apparatus comprises units configured to execute the method in the seventeenth aspect or any possible implementation manner of the seventeenth aspect.

[0081] In a twentieth aspect, the present application provides a communication apparatus, which is specifically a terminal device or a chip therein, for executing the method in the eighteenth aspect or any possible implementation manner of the eighteenth aspect. The communication apparatus comprises units configured to execute the method in the eighteenth aspect or any possible implementation manner of the eighteenth aspect.

[0082] In the nineteenth aspect or the twentieth aspect, the communication apparatus can comprise a transceiver and a processing unit. For specific description of the transceiver and the processing unit, reference can be made to the apparatus embodiments shown below. The beneficial effects of the nineteenth aspect to the twentieth aspect can be referred to the related description of the seventeenth aspect and the eighteenth aspect, which will not be repeated here.

[0083] In a twenty-first aspect, the present application provides a communication apparatus, which is a network device, comprising a processor configured to execute the method in the first aspect, the fifth aspect, the ninth aspect, the thirteenth aspect, the seventeenth aspect, or any possible implementation manner of any of the aspects. Alternatively, the processor is configured to execute a program stored in a memory, and when the program is executed, the method in the first aspect, the fifth aspect, the ninth aspect, the thirteenth aspect, the seventeenth aspect, or any possible implementation manner of any of the aspects is executed.

[0084] In combination with the twenty-first aspect, in a possible implementation manner, the memory is located outside the communication apparatus.

[0085] In combination with the twenty-first aspect, in a possible implementation manner, the memory is located inside the communication apparatus.

[0086] In the present application, the processor and the memory can also be integrated into one device, i.e., the processor and the memory can also be integrated together.

[0087] In combination with the twenty-first aspect, in a possible implementation manner, the communication apparatus further comprises a transceiver configured to send indication information.

[0088] In a twentieth aspect, this application provides a communication device, which is a terminal device. The communication device includes a processor configured to execute the methods shown in any possible implementation of the second, sixth, tenth, fourteenth, eighteenth, or any of these aspects. Alternatively, the processor may execute a program stored in a memory, and when the program is executed, the methods shown in any possible implementation of the second, sixth, tenth, fourteenth, eighteenth, or any of these aspects are executed.

[0089] In conjunction with aspect twenty-two, in one possible implementation, the memory is located outside the aforementioned communication device.

[0090] In conjunction with aspect twenty-two, in one possible implementation, the memory is located within the aforementioned communication device.

[0091] In this application, the processor and memory can also be integrated into a single device, that is, the processor and memory can be integrated together.

[0092] In conjunction with aspect twenty-two, in one possible implementation, the communication device further includes a transceiver for receiving instruction information.

[0093] In a twentieth aspect, this application provides a communication device including a logic circuit and an interface, the logic circuit and the interface being coupled together.

[0094] In one design, a logic circuit is used to generate first indication information and second indication information. The first indication information is used to indicate a combination of a transport layer number and a TPMI index, the transport layer number and the TPMI index corresponding to each other. The first indication information has at least a first value, the first value indicating multiple combinations of the transport layer number and the TPMI index, the multiple combinations including the first combination and the second combination. The second indication information is used to indicate a DMRS port index. The value of the second indication information belongs to one of multiple sets, the multiple sets including at least the first set and the second set. When the value of the second indication information is a value in the first set, the DMRS port index is associated with the first combination; when the value of the second indication information is a value in the second set, the DMRS port index is associated with the second combination. An interface is used to output the first indication information and the second indication information.

[0095] In one design, a logic circuit generates first indication information and third indication information. The first indication information indicates a combination of a transmission rank and a transmit precoding matrix indicator (TPMI) index, the transmission rank and the TPMI index corresponding to each other, the first indication information having at least a first value, the first value indicating a plurality of combinations of transmission ranks and TPMI indices. The third indication information indicates one of the plurality of combinations. An interface outputs the first indication information and the third indication information.

[0096] In one design, a logic circuit generates fourth indication information and third indication information. The fourth indication information indicates a demodulation reference signal (DMRS) port index. The fourth indication information has at least a second value, the second value indicating a plurality of DMRS port index groups, each DMRS port index group including at least one DMRS port index. The third indication information indicates one of the plurality of DMRS port index groups. An interface outputs the fourth indication information and the third indication information.

[0097] In one design, a logic circuit generates fifth indication information and second indication information. The fifth indication information indicates a sounding reference signal (SRS) resource index. The fifth indication information has at least a first value, the first value indicating a plurality of SRS resource index groups, each SRS resource index group including at least one SRS resource index. The second indication information indicates a demodulation reference signal (DMRS) port index. A value of the second indication information belongs to one of a plurality of sets, the plurality of sets including at least a first set and a second set. When the second indication information is a value in the first set, the DMRS port index is associated with a first transmission rank. When the second indication information is a value in the second set, the DMRS port index is associated with a second transmission rank. The plurality of SRS resource index groups includes a first SRS resource index group and a second SRS resource index group. The first SRS resource index group includes a number of SRS resource indices equal to the first transmission rank. The second SRS resource index group includes a number of SRS resource indices equal to the second transmission rank. An interface outputs the fifth indication information and the second indication information.

[0098] In one design, a logic circuit generates fifth indication information and third indication information. The fifth indication information indicates a sounding reference signal (SRS) resource index. The fifth indication information has at least a first value, the first value indicating a plurality of SRS resource index groups, each SRS resource index group including at least one SRS resource index. The third indication information indicates one of the plurality of SRS resource index groups. An interface outputs the fifth indication information and the third indication information.

[0099] In a twenty-fourth aspect, the application provides another communication apparatus, comprising a logic circuit and an interface, the logic circuit and the interface being coupled.

[0100] In one design, an interface is configured to input first indication information and second indication information, the first indication information is configured to indicate a combination of a transmission layer number and a TPMI index, the transmission layer number and the TPMI index correspond to each other, the first indication information has at least a first value, the first value indicates a plurality of combinations of transmission layer numbers and TPMI indexes, the plurality of combinations includes a first combination and a second combination; the second indication information is configured to indicate a DMRS port index; a value of the second indication information belongs to one of a plurality of sets, the plurality of sets includes at least a first set and a second set, when the value of the second indication information is a value in the first set, the DMRS port index is associated with the first combination, when the value of the second indication information is a value in the second set, the DMRS port index is associated with the second combination; and a logic circuit is configured to determine one combination from the plurality of combinations according to the value of the second indication information.

[0101] In one design, an interface is configured to input first indication information and third indication information, the first indication information is configured to indicate a combination of a transmission layer number and a TPMI index, the transmission layer number and the TPMI index correspond to each other, the first indication information has at least a first value, the first value indicates a plurality of combinations of transmission layer numbers and TPMI indexes; and a logic circuit is configured to determine one combination from the plurality of combinations according to the third indication information.

[0102] In one design, an interface is configured to input fourth indication information and third indication information, the fourth indication information is configured to indicate a DMRS port index, the fourth indication information has at least a second value, the second value indicates a plurality of DMRS port index groups, each DMRS port index group includes at least one DMRS port index; and a logic circuit is configured to determine one DMRS port index group from the plurality of DMRS port index groups according to the third indication information.

[0103] In one design, an interface is configured to input fifth indication information and second indication information. The fifth indication information is configured to indicate sounding reference signal (SRS) resource indices. The fifth indication information has at least a first value, which indicates a plurality of SRS resource index groups. Each SRS resource index group includes at least one SRS resource index. The second indication information is configured to indicate a demodulation reference signal (DMRS) port index. The second indication information has a value that belongs to one of a plurality of sets, which includes at least a first set and a second set. The DMRS port index is associated with a first number of transmission layers when the second indication information has a value in the first set. The DMRS port index is associated with a second number of transmission layers when the second indication information has a value in the second set. The plurality of SRS resource index groups includes a first SRS resource index group and a second SRS resource index group. The first SRS resource index group includes a number of SRS resource indices equal to the first number of transmission layers. The second SRS resource index group includes a number of SRS resource indices equal to the second number of transmission layers. A logic circuit is configured to determine one SRS resource index group from the plurality of SRS resource index groups based on the value of the second indication information.

[0104] In one design, an interface is configured to input fifth indication information and third indication information. The fifth indication information is configured to indicate sounding reference signal (SRS) resource indices. The fifth indication information has at least a first value, which indicates a plurality of SRS resource index groups. Each SRS resource index group includes at least one SRS resource index. A logic circuit is configured to determine one SRS resource index group from the plurality of SRS resource index groups based on the third indication information.

[0105] In a twenty-fifth aspect, embodiments of the present application provide a computer readable storage medium configured to store a computer program, which when executed on a computer, causes the method of any possible implementation of the above first aspect, the above fifth aspect, the above ninth aspect, the above thirteenth aspect, the above seventeenth aspect, or any of these aspects to be performed.

[0106] In a twenty-sixth aspect, embodiments of the present application provide a computer readable storage medium configured to store a computer program, which when executed on a computer, causes the method of any possible implementation of the above second aspect, the above sixth aspect, the above tenth aspect, the above fourteenth aspect, the above eighteenth aspect, or any of these aspects to be performed.

[0107] In a twenty-seventh aspect, an embodiment of the present application provides a computer program product, which comprises computer programs or computer codes, when executed on a computer, cause the method shown in the first aspect, the fifth aspect, the ninth aspect, the thirteenth aspect, the seventeenth aspect, or any possible implementation of any of the aspects to be performed.

[0108] In a twenty-eighth aspect, an embodiment of the present application provides a computer program product, which comprises computer programs or computer codes, when executed on a computer, cause the method shown in the second aspect, the sixth aspect, the tenth aspect, the fourteenth aspect, the eighteenth aspect, or any possible implementation of any of the aspects to be performed.

[0109] In a twenty-ninth aspect, an embodiment of the present application provides a computer program, when executed on a computer, cause the method shown in the first aspect, the fifth aspect, the ninth aspect, the thirteenth aspect, the seventeenth aspect, or any possible implementation of any of the aspects to be performed.

[0110] In a thirtieth aspect, an embodiment of the present application provides a computer program, when executed on a computer, cause the method shown in the second aspect, the sixth aspect, the tenth aspect, the fourteenth aspect, the eighteenth aspect, or any possible implementation of any of the aspects to be performed.

[0111] In a thirty-first aspect, an embodiment of the present application provides a wireless communication system, which comprises a network device and a terminal device, the network device is configured to perform the method shown in the first aspect, the fifth aspect, the ninth aspect, the thirteenth aspect, the seventeenth aspect, or any possible implementation of any of the aspects, and the terminal device is configured to perform the method shown in the second aspect, the sixth aspect, the tenth aspect, the fourteenth aspect, the eighteenth aspect, or any possible implementation of any of the aspects. BRIEF DESCRIPTION OF DRAWINGS

[0112] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows.

[0113] Figure 1 is a schematic diagram of the architecture of the communication system provided by the embodiments of the present application;

[0114] Figure 2 is a simplified structure schematic diagram of the UE and the base station provided by the embodiments of the present application;

[0115] Figure 3is a non-codebook uplink transmission process schematic diagram provided by an embodiment of the present application;

[0116] Figure 4 is a first process schematic diagram of an information indication method provided by an embodiment of the present application;

[0117] Figure 5 is a second process schematic diagram of an information indication method provided by an embodiment of the present application;

[0118] Figure 6 is a third process schematic diagram of an information indication method provided by an embodiment of the present application;

[0119] Figure 7 is a fourth process schematic diagram of an information indication method provided by an embodiment of the present application;

[0120] Figure 8 is a fifth process schematic diagram of an information indication method provided by an embodiment of the present application;

[0121] Figure 9 is a structure schematic diagram of a communication device provided by an embodiment of the present application;

[0122] Figure 10 is a structure schematic diagram of a communication device 1000 provided by an embodiment of the present application;

[0123] Figure 11 is another structure schematic diagram of a communication device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0124] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0125] In the embodiments of the present application, "at least one" means one or more, and "multiple" means two or more. "And / or" describes the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can represent the following three cases: A exists alone, A and B exist together, B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after it. "At least one of the following" or similar expressions means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can represent: a, b, c; a and b; a and c; b and c; or a and b and c. Where a, b, and c can be single or multiple.

[0126] In the description of the present application, the words "first", "second", etc. are used only to distinguish different objects, and do not limit the quantity and execution order, and the words "first", "second", etc. do not also limit to be different. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device, etc. comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units not listed, etc., or optionally also includes other steps or units inherent to these processes, methods, products or devices, etc.

[0127] In the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design scheme described in the present application as "exemplary", "for example", or "for instance" should not be construed as being more preferred or advantageous than other embodiments or design schemes. Rather, the use of the words "exemplary", "for example", or "for instance" is intended to present the relevant concept in a specific manner.

[0128] It should be understood that in the present application, "when", "if" and "whether" all refer to the device making corresponding processing under certain objective conditions, and are not limited to time, and do not require the device to have a judgment action when implemented, nor does it mean that there are other limitations.

[0129] In the present application, "at the same time" can be understood as at the same time point, can also be understood as within a period of time, and can also be understood as within the same cycle, which can be understood in combination with the context.

[0130] In the present application, the element expressed by using the singular is intended to represent "one or more", rather than "one and only one", unless otherwise specified.

[0131] In addition, the terms "system" and "network" can be used interchangeably in the present application.

[0132] It should be understood that in the embodiments of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that the determination of B according to A does not mean that B is determined only according to A, but B can also be determined according to A and / or other information.

[0133] The technical solutions of the embodiments of the present application can be applied to a communication system of various radio access technologies (RATs), for example, a long term evolution (LTE) system, a worldwide interoperability for microwave access (WiMAX) communication system, a 5th generation (5G) system, such as a new radio access technology (NR) communication system, a transition system between an LTE communication system and a 5G communication system (the transition system can also be referred to as a 4.5G communication system), a network of multiple system fusion, an Internet of Things system, a vehicle-to-vehicle system, and the like. Of course, the technical solutions of the embodiments of the present application can also be applied to future communication systems, such as a 6th generation (6G) or even a 7th generation (7G) system.

[0134] It should be understood that the network architecture and service scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. It can be known by those skilled in the art that, with the evolution of communication network architecture and the appearance of new service scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0135] In some scenarios in the embodiments of the present application, the scenarios of the NR network in a wireless communication network are taken as examples for illustration. It should be understood that the solutions in the embodiments of the present application can also be applied to other wireless communication networks, and the corresponding names can be replaced by the names of corresponding functions in other wireless communication networks.

[0136] Referring to Figure 1 , Figure 1 is an architecture diagram of a communication system provided by the embodiments of the present application. As Figure 1 indicated, the communication system includes one or more network devices (such as a base station in Figure 1 ) and one or more terminal devices (such as a user equipment in Figure 1A terminal device (e.g., a UE in a wireless communication system) can communicate wirelessly with a network device. One terminal device can communicate with one network device or multiple network devices simultaneously, and one network device can communicate with one terminal device or multiple terminal devices simultaneously. For uplink transmission, a terminal device can be equipped with one or more antennas for data / information transmission and reception. A network device can be equipped with multiple antennas for data / information transmission and reception. It should be understood that a network device and a terminal device can also include other components that are related to data / information transmission and reception (e.g., a processor, a modulator, a multiplexer, a demodulator, a demultiplexer, etc.). It should also be understood that Figure 1 The communication system is merely an example, and other devices, such as a core network device, a wireless relay device, and / or a wireless backhaul device, etc., can also be included in the communication system, which are not shown in Figure 1

[0137] ​Optionally, the network device in the embodiments of the present application includes an access network device, such as a base station (BS). The access network device can be a device that provides access for terminals, and can include a radio access network (RAN) device and an access node (AN) device. The RAN device is mainly a wireless network device in a 3GPP network, and the AN device can be an access network device that is not defined by 3GPP. The RAN device is mainly responsible for functions such as radio resource management, quality of service (QoS) management, data compression and encryption on the air interface side. The RAN device can include various forms of base stations, such as macro base stations, micro base stations (also known as small stations), relay stations, access points, balloon stations, etc. In systems using different wireless access technologies, the names of devices with base station functions may vary, for example, in LTE systems, fifth generation (5G), sixth generation (6G) and even seventh generation (7G) systems, network devices can be referred to as: RAN or next-generation Node base station (gNB), evolved Node B (eNB or eNodeB), network device controller (BSC), network device transceiver station (BTS), home network device (for example, home evolved Node B, or home Node B, HNB), baseband unit (BBU), access point (AP) in a wireless fidelity (WIFI) system, wireless relay node, wireless backhaul node, transmission and reception point (TRP), transmission point (TP), etc.; or one or a group of (including multiple antenna panels) antenna panels of a network device in a 5G system, or a network node that constitutes a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (DU), or a road side unit (RSU) in a vehicle to everything (V2X) or intelligent driving scenario.

[0138] It can be understood that, in the embodiments of the present application, the apparatus for implementing the function of the network device can be the network device, or can be an apparatus capable of supporting the network device to implement the function, such as a chip system, or a communication module, or a modem, etc., which can be installed in the network device. In the technical solutions provided in the embodiments of the present application, the apparatus for implementing the function of the network device is the network device, and taking the network device as a base station as an example, the technical solutions provided in the embodiments of the present application are described. The base station can support the network of the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0139] In some deployments, a gNB or transmission point can include a centralized unit (CU) and a DU, etc. The gNB or transmission point can also include a radio unit (RU). The CU implements part of the functions of the gNB or transmission point, and the DU implements part of the functions of the gNB or transmission point, for example, the CU implements the functions of the radio resource control (RRC) layer, the packet data convergence protocol (PDCP) layer, and the DU implements the functions of the radio link control (RLC), the media access control (MAC) and the physical (PHY) layer. Since the information of the RRC layer will eventually become the information of the physical layer, or be converted from the information of the physical layer, under this architecture, high-layer signaling, such as RRC layer signaling or PDCP layer signaling, can also be considered to be transmitted by the DU, or transmitted by the DU+RU. It can be understood that the network device can be a CU node, or a DU node, or a device including a CU node and a DU node. Alternatively, the network device can also be an auxiliary communication device, such as a satellite.

[0140] Optionally, the terminal device in the embodiments of the present application can also be referred to as a terminal, a user equipment (UE), a customer premise equipment (CPE), a mobile station (MS), a mobile terminal (MT), an access terminal device, a vehicle-mounted terminal, an industrial control terminal, a UE unit, a UE station, a remote station, a remote terminal device, a mobile device, a UE agent or a UE apparatus, etc. The terminal device is a kind of device with wireless transceiving function, which can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; can also be deployed on water surface (such as ships, etc.); can also be deployed in the air (such as airplanes, balloons and satellites, etc.). The terminal device can be a mobile phone, a tablet computer (Pad), a computer with wireless transceiving function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a vehicle-mounted terminal device, a wireless terminal in unmanned driving, a wireless terminal in remote medical treatment, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a wearable terminal device, etc. The terminal device can be fixed or mobile.

[0141] It can be understood that, in the embodiments of the present application, the device for implementing the function of the terminal can be a terminal; or can be a device capable of supporting the terminal to implement the function, such as a chip system, or a communication module, or a modem, etc., which can be installed in the terminal. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices. In the technical solutions provided by the embodiments of the present application, the device for implementing the function of the terminal is a terminal, and taking the terminal as an example of UE, the technical solutions provided by the embodiments of the present application are described. The embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal device.

[0142] In some scenarios, the UE can also be used to act as a base station. For example, the UE can act as a scheduling entity that provides sidelink signals between UEs in vehicle-to-everything (V2X), device-to-device (D2D) or peer to peer (P2P), etc.

[0143] In some scenarios, a UE can also be used to act as a relay node. For example, a UE can act as a relay device, or an integrated access and backhaul (IAB) node, to provide wireless backhaul service for terminal devices.

[0144] In the embodiments of the present application, the term "wireless communication" can also be referred to as "communication", and the term "communication" can also be described as "data transmission", "information transmission" or "transmission".

[0145] Referring to Figure 2 , Figure 2 is a simplified structure diagram of a UE and a base station provided by the embodiments of the present application. For simplicity, Figure 2 only the main components in the base station 110 and the UE 120 are shown, and in actual applications, the structure of the base station and the UE can be more than Figure 2 the components shown, can be less than Figure 2 the components shown, and can only include Figure 2 the components shown. The following will briefly introduce each component in Figure 2 .

[0146] The base station 110 includes an interface 111 and a processor 112. The processor 112 can optionally store a program 114. The base station 110 can optionally include a memory 113. The memory 113 can optionally store a program 115. The UE 120 includes an interface 121 and a processor 122. The processor 122 can optionally store a program 124. The UE 120 can optionally include a memory 123. The memory 123 can optionally store a program 125. These components work together to provide various functions described in the present application. For example, the processor 112 and the interface 111 work together to provide a wireless connection between the base station 110 and the UE 120. The processor 122 and the interface 121 work together to implement the downlink transmission and / or uplink transmission of the UE 120.

[0147] The processor (e.g., the processor 112 and / or the processor 122) can include one or more processors and be implemented as a combination of computing devices. The processor (e.g., the processor 112 and / or the processor 122) can respectively include one or more of a microprocessor, a microcontroller, a digital signal processor (DSP), a digital signal processing device (DSPD), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), a programmable logic device (PLD), gated logic, transistor logic, discrete hardware circuits, processing circuitry, or other suitable hardware, firmware, and / or hardware and software in combination, for performing the various functions described in the present application. The processor (e.g., the processor 112 and / or the processor 122) can be a general purpose processor or a special purpose processor. For example, the processor 112 and / or the processor 122 can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data. The central processing unit can be used to make the base station 110 and / or the UE 120 execute software programs and process data in the software programs.

[0148] The interface (e.g., the interface 111 and / or 121) can include a wire for coupling a wired connection, or a pin for coupling a wireless transceiver, or a chip and / or pin for a wireless connection, for enabling communication between one or more computer devices (e.g., a UE, a BS, and / or a network node). In some embodiments, the interface can include a transmitter, a receiver, a transceiver, and / or an antenna. The interface can be configured to use any available protocol (e.g., a 3GPP standard).

[0149] A program in the present application is used in a broad sense to mean software. Non-limiting examples of software are program code, programs, subprograms, instructions, instruction sets, codes, code segments, software modules, application programs, software applications, etc. The program can be run in the processor and / or computer to make the base station 110 and / or the UE 120 perform various functions and / or processes described in the present application.

[0150] Memory (e.g., memory 113 and / or memory 123) can store data which is manipulated by the processor 112, 122 when executing software. Memory 113, 123 can be implemented using any storage technology. For example, memory can be implemented using a processor and / or computer accessible memory, such as RAM, ROM, EEPROM, CD-ROM, or any other available storage media. Memory 113, 123 can be removable memory, local or remote to the processor.

[0151] Memory (e.g., memory 113 and / or memory 123) and processor (e.g., processor 112 and / or processor 122) can be separate or integrated together. Memory can be used in connection with processor to enable processor to read information from memory, store and / or write information to memory. Memory 113 can be integrated in processor 112. Memory 123 can be integrated in processor 122. Processor (e.g., processor 112 and / or processor 122) and memory (e.g., memory 113 and / or memory 123) can be disposed in an integrated circuit (e.g., the integrated circuit can be disposed in a UE or a base station or other network node).

[0152] The above briefly describes the network architecture of the embodiments of the present application, in order to better understand the technical solutions of the embodiments of the present application, the following will briefly introduce several contents related to the present application.

[0153] I. Demodulation reference signal (dedicated demodulation reference signal, DMRS)

[0154] A demodulation reference signal (DMRS) is a reference signal used for equivalent channel estimation at the receiving end. The DMRS can be used to estimate the equivalent channel matrix experienced by a data channel (such as a physical uplink shared channel (PUSCH) or a physical downlink shared channel (PDSCH)) or a control channel (such as a physical uplink control channel (PUCCH) or a physical downlink control channel (PDCCH)), thereby used for detection and demodulation of data. Taking the PUSCH as an example, the DMRS is usually subjected to the same precoding processing as the transmitted data signal, i.e., the same precoding matrix P is used, to ensure that the DMRS and the data signal experience the same equivalent channel.

[0155] For example, assuming that the DMRS vector transmitted by the transmitting end is s, and the data symbol vector transmitted is x, the DMRS and the data symbol are subjected to the same precoding operation, i.e., multiplied by the same precoding matrix P, the corresponding received signal vector at the receiving end can be represented as follows.

[0156] Data:

[0157] DMRS:

[0158] wherein the above formula (1-1) is the equivalent received signal vector (y) of the data symbol transmitted to the receiving end, and the above formula (1-2) is the equivalent received signal vector (r) of the DMRS transmitted to the receiving end. The vector n represents noise.

[0159] As can be seen from the above formula (1-1) and the above formula (1-2), for the data signal and the DMRS, the equivalent channel experienced is The receiving end can obtain an estimate of the equivalent channel (i.e., HP) based on the known DMRS vector s using a channel estimation algorithm (such as a least squares (LS) channel estimation or a minimum mean square error (MMSE) channel estimation, etc.). Based on the equivalent channel, MIMO equalization and subsequent demodulation of the data signal can be completed.

[0160] The DMRS is used to estimate the equivalent channel (i.e., HP), which has a dimension of N R x R (i.e., NR (R rows, R columns). Where, N R R represents the number of receive antennas, and R represents the number of transport streams (also known as the number of transport layers, spatial layers, or rank). Typically, one DMRS port corresponds to one spatial layer. For a MIMO transmission with R transport layers, R is the number of DMRS ports required. To ensure the quality of channel estimation, different DMRS ports are usually orthogonal ports. The DMRS symbols corresponding to different DMRS ports are orthogonal in at least one domain: the frequency domain, time-frequency domain, or code domain.

[0161] In some scenarios of this application, "transmission layer number" and "rank" have the same meaning and can be used interchangeably.

[0162] II. Transmitted Precoding Matrix Indicator (TPMI)

[0163] In multiple-input multiple-output (MIMO) systems, to effectively guarantee uplink data transmission performance, precoding of the uplink multi-layer transmission signals is typically performed. For example, suppose the data symbol vector transmitted by the terminal device is x = [x1, x2, ..., x...]. l ,...,x L ] T , where x l This represents the transmitted data symbol corresponding to the l-th spatial layer. Assuming the precoding matrix is ​​W, the precoded transmitted signal vector can be represented as:

[0164]

[0165] in, This represents the transmitted symbol corresponding to the j-th transmitting antenna port, where j can take values ​​of 1, 2, 3, ..., N.

[0166] In practical applications, the precoding matrix (W) used by the terminal device in uplink transmission is usually indicated to the terminal device by the network device. Among them, considering the indication overhead and performance of the precoding matrix, for a codebook-based system, the precoding matrix W is usually selected from a preset precoding matrix set (also known as codebook). Taking the NR protocol as an example, for a single-antenna single-layer transmission system, the precoding matrix W = 1. For a multi-antenna system, the network device sends a TPMI (transmit precoding matrix indication) to the terminal device to indicate which precoding matrix in the codebook set needs to be used for uplink precoding. Taking a 4-antenna port as an example, the NR protocol defines different codebooks for rank = 1 to 4, as shown in Tables 1 to 4 below. It can be understood that the symbol “-” in Tables 1 to 4 represents no content.

[0167] Table 1: Precoding matrix set corresponding to 4-antenna port, single-layer (i.e., rank = 1) transmission

[0168]

[0169]

[0170] Table 2: Precoding matrix set corresponding to 4-antenna port, 2-layer (i.e., rank = 2) transmission

[0171]

[0172] Table 3: Precoding matrix set corresponding to 4-antenna port, 3-layer (i.e., rank = 3) transmission

[0173]

[0174] Table 4: Precoding matrix set corresponding to 4-antenna port, 4-layer (i.e., rank = 4) transmission

[0175]

[0176] The antenna architecture and capability of different terminal devices are different due to the volume and cost of the terminal devices. For different terminal device transmit antenna capabilities, the precoding matrices that can be used are not the same. In other words, for different antenna capabilities, the range of TPMI index values is different. For example, 1) when the antenna capability of a terminal device (or UE) is that none of the transmit antennas support coherent transmission (Non Coherent), the terminal device can use the precoding matrices identified by TPMI index = 0-3 in Table 1, TPMI index = 0-5 in Table 2, TPMI index = 0 in Table 3, and TPMI index = 0 in Table 4. 2) When the antenna capability of a terminal device (or UE) is that all transmit antennas support partial coherent transmission (Partial Coherent), for example, only antennas in a subset or subgroup of antennas can support coherent transmission, the corresponding precoding matrices identified by TPMI index = 4-11 in Table 1, TPMI index = 6-13 in Table 2, TPMI index = 1-2 in Table 3, and TPMI index = 1-2 in Table 4. 3) When the antenna capability of a terminal device (or UE) is that all transmit antennas support coherent transmission (Full Coherent), the corresponding precoding matrices identified by TPMI index = 12-27 in Table 1, TPMI index = 14-21 in Table 2, TPMI index = 3-6 in Table 3, and TPMI index = 3-4 in Table 4. It can be understood that when the antenna capability of a terminal device (or UE) is that all transmit antennas support coherent transmission (Full Coherent), since the antenna capability of the terminal device is strong, the terminal device can use any precoding matrix in Tables 1-4 (including non-coherent transmission precoding matrices, partial coherent transmission precoding matrices, and full coherent transmission precoding matrices), and is not limited to the precoding matrices identified by TPMI index = 12-27 in Table 1, TPMI index = 14-21 in Table 2, TPMI index = 3-6 in Table 3, and TPMI index = 3-4 in Table 4. When the antenna capability of a terminal device (or UE) is to support partial coherent transmission (Partial Coherent), the terminal device can use non-coherent transmission precoding matrices and partial coherent transmission precoding matrices in Tables 1-4, and the corresponding precoding matrices identified by TPMI index = 4-27 in Table 1, TPMI index = 6-21 in Table 2, TPMI index = 1-6 in Table 3, and TPMI index = 1-4 in Table 4.When the antenna capability of the terminal device (or UE) is to support non-coherent transmission, the terminal device can only use the precoding matrices of non-coherent transmission in Tables 1 to 4, corresponding to the precoding matrices identified by TPMI index = 0 ~ 3 in Table 1, TPMI index = 0 ~ 5 in Table 2, TPMI index = 0 in Table 3, and TPMI index = 0 in Table 4.

[0177] III. Codebook-based uplink transmission

[0178] For uplink transmission, when the terminal device is configured with multiple antenna transmission radio frequency channels, the terminal device can perform uplink MIMO transmission through multiple antennas. Or multiple terminal devices simultaneously transmit on the same time-frequency resource to form a virtual MIMO system, i.e. uplink (UL) multi-user (MU) MIMO transmission (UL MU-MIMO). The current NR protocol supports two uplink MIMO transmission modes: codebook-based transmission and non-codebook transmission.

[0179] For codebook-based uplink transmission, the precoding matrix for uplink transmission can be determined according to a fixed or preset codebook. Specifically, the codebook-based uplink transmission process includes: 1) the terminal device sends a sounding reference signal (SRS) to the network device. 2) The network device performs uplink channel measurement according to the SRS sent by the terminal device, and determines the DMRS port index, the number of transmission layers (i.e. rank), the precoding matrix, and the modulation and coding scheme (MCS) and other information for uplink transmission. 3) The network device informs the terminal device of the resource scheduling information of the PUSCH such as MCS, TPMI index, number of transmission layers (i.e. rank), and DMRS port index. 4) The terminal device encodes and modulates the uplink data based on the MCS indicated by the network device, and determines the precoding matrix based on the indicated TPMI index and the number of transmission layers, and precodes the uplink data and the DMRS signal indicated by the DMRS port index, and then transmits the uplink data and the DMRS.

[0180] That is, in the uplink transmission process, the sending behavior of the terminal device is subject to the scheduling of the network device. The network device can inform the terminal device of the transmission layer number (also referred to as rank), TPMI index, and corresponding DMRS port index through indication information. The terminal device can send the uplink data and DMRS by using the precoding matrix identified by the TPMI index and the DMRS and the transmission layer number (i.e., rank) indicated by the DMRS port index at the time of sending the uplink data on the corresponding time-frequency resource. The meanings of the DMRS port index and the transmission layer number (i.e., rank) are described in the existing standards or protocols, which are not described one by one here.

[0181] Taking the NR protocol as an example, the maximum uplink (UL) transmission currently supports 4 layers, and the network device can indicate the transmission layer number (i.e., rank) and the corresponding TPMI index, and the DMRS port index to the terminal device through downlink control information (DCI) signaling. Specifically, the precoding information and layer number field in the DCI signaling is used to indicate the transmission layer number (i.e., rank) and the corresponding TPMI index. For different antenna capabilities and configuration parameters of the terminal device (or UE), the protocol defines different optional combinations of the transmission layer number (i.e., rank value) and TPMI index. For example, for 4 antenna ports, if the configuration parameter of the terminal device is that the transform precoder is not turned on (cyclic prefix (CP) orthogonal frequency-division multiplexing (OFDM) waveform), and the uplink full power transmission (ul-FullPowerTransmission) is not configured or is configured as full power mode 2 (fullpowerMode2) or full power (fullpower), the optional combinations of rank and TPMI index are shown in the following table 5.

[0182] It can be understood that the TPMI index value in table 5 represents the corresponding precoding matrix in the foregoing table 1 to the foregoing table 4.

[0183] Table 5: Optional combinations of TPMI index and transmission layer number (i.e., rank) for 4 antenna ports (transform precoder is not turned on, ul-FullPowerTransmission is not configured, or is configured as fullpowerMode2 or fullpower)

[0184]

[0185]

[0186] The first, third and fifth columns of Table 5 above represent the value of the precoding information and number of layers field, which is an index value representing one combination of rank and TPMI index. The second, fourth and sixth columns of Table 5 above represent the selectable combinations of rank and TPMI index for different antenna capabilities. The terminal device can obtain the rank and TPMI index for uplink transmission according to the value of the precoding information and number of layers field in the DCI signaling and its own antenna capability (e.g. coherent, partial coherent or non-coherent). For example, assuming that the value of the precoding information and number of layers field in the DCI signaling is 3 (i.e. index value 3) and the antenna capability of the terminal device is non-coherent, the combination of rank and TPMI index for uplink transmission can be determined as: rank = 1, TPMI = 3.

[0187] In addition, the DCI signaling also includes an antenna port field for indicating the DMRS port index. The protocol defines different DMRS port index tables for different rank values. Taking double-symbol Type 1 DMRS as an example, when the transform precoder is not enabled, the DMRS port index tables corresponding to 1 layer (i.e. rank = 1) to 4 layers (i.e. rank = 4) are shown in Tables 6 to 9 below. The terminal device can select the corresponding DMRS port index table according to the rank value obtained based on the precoding information and number of layers field and its own antenna capability, so as to determine the DMRS port index indicated by the antenna port field.

[0188] Table 6: DMRS port index, dmrs-Type = 1, maximum number of DMRS symbols = 2, rank = 1

[0189]

[0190]

[0191] Table 7: DMRS port index, dmrs-Type = 1, maximum number of DMRS symbols = 2, rank = 2

[0192]

[0193] Table 8: DMRS port index, dmrs-Type = 1, maximum number of DMRS symbols is 2, rank = 3

[0194]

[0195] Table 9: DMRS port index, dmrs-Type = 1, maximum number of DMRS symbols is 2, rank = 4

[0196]

[0197] The first column (value) in the above Tables 6 to 9 represents the value of the antenna port field, and the third column (DMRS port(s)) represents the DMRS port index value. The meanings of the second and fourth columns of parameters in the above Tables 6 to 9 can refer to the existing standards or protocols, which are not described one by one here.

[0198] From the indication method of rank, TPIM index and DMRS port index in the NR protocol (as shown in the above Tables 5 to 9), it can be known that the maximum uplink transmission can only support 4 layers (i.e., rank = 4). However, with the further improvement of terminal device capability, the terminal devices with more than 4 transmit antennas are increasing. The maximum number of transmission layers (i.e., rank) that can be supported by the terminal device with more than 4 antennas is also greater than 4, such as the terminal device with 8 antennas can support up to 8 layers (i.e., rank = 8) of uplink transmission. Therefore, the indication of TPIM index and DMRS port index for more than 4 antenna ports is urgently explored.

[0199] Four, non-codebook transmission

[0200] For non-codebook transmission, the main difference compared with codebook-based transmission is that the precoding matrix of non-codebook transmission is no longer selected from the preset codebook, so that the indication overhead of the precoding matrix can be saved. Compared with the codebook transmission mode, the precoding matrix does not need to be selected from the limited preset precoding set, breaks through the limitation of the amplitude and phase quantization accuracy of the precoding matrix in the codebook, can effectively improve the precoding matrix accuracy, and further improves the transmission performance.

[0201] Referring to Figure 3 , Figure 3 is a non-codebook uplink transmission flowchart provided by the embodiments of the present application. As Figure 3As shown, the non-codebook-based uplink transmission process includes: 1) the terminal device performs channel measurement through a downlink reference signal, obtains a candidate uplink precoding matrix, and sends SRS to the network device after precoding based on the determined uplink precoding matrix. 2) The network device performs channel estimation based on the SRS sent by the terminal device, and schedules the terminal device based on the channel measurement result, determines the SRS resource of the uplink transmission and the MCS of the uplink transmission, and notifies the terminal device. The SRS resource of the uplink transmission is notified to the terminal device through SRS resource indication (SRS resource indicator, SRI). 3) The terminal device determines the number of transmission layers (i.e., rank) according to the received SRI, encodes and modulates the data through the MCS information, and then sends the precoded uplink data.

[0202] V. Sounding Reference Signal Resource Indicator (SRI)

[0203] Sounding reference signal (SRS) is mainly used for the network device to determine the uplink channel quality, so as to perform uplink frequency selective scheduling. The network device can configure the time-frequency resource position occupied by the SRS resource and the transmission mode adopted for sending the SRS on the SRS resource through high-layer signaling such as radio resource control (RRC) signaling or medium access control-control element (MAC-CE) signaling. The configuration information of each SRS resource (for example, the high-layer parameter SRS-Resource) at least includes: the index number of the SRS resource, the time-frequency position information occupied by the SRS resource, the SRS transmission port number, etc. The time domain type of the SRS resource configuration has periodic, semi-static and aperiodic.

[0204] For non-codebook-based uplink transmission, the network device can indicate SRS resource configuration information and channel state information (CSI) reference signal (CSI-RS) resource configuration information associated with the SRS through RRC signaling, wherein the CSI-RS resource configuration information includes the ports of the CSI-RS resource, the occupied time-frequency resources, etc. The network device transmits the CSI-RS on the corresponding time-frequency resources, the terminal device receives the CSI-RS on the corresponding time-frequency resources and obtains a candidate precoding matrix based on channel reciprocity assumption and its own algorithm, and then transmits the SRS processed by the candidate precoding matrix on the corresponding SRS resource. The network device receives and measures the weighted SRS on the corresponding SRS time-frequency resource to obtain the uplink channel information. The network device determines the time-frequency resources and transmission scheme used by the terminal device to transmit PUSCH through its own implementation algorithm, and indicates these information to the terminal device through the DCI signaling carried in the PDCCH for uplink scheduling. The transmission scheme at least includes beam information, SRS resource indication (SRI), modulation and coding strategy (MCS), and antenna port indication information used by the terminal device to transmit PUSCH. After receiving the DCI for scheduling PUSCH transmission, the terminal device transmits PUSCH according to the time-frequency resources and transmission scheme indicated in the DCI. Each SRS transmitted on each SRS resource corresponds to a precoding matrix, usually, one SRS resource is one virtual port, and the number of SRS resources configured by the higher layer signaling represents the maximum number of layers supported by PUSCH transmission. The terminal device needs to transmit DMRS associated with PUSCH while transmitting PUSCH, and the network device performs channel estimation and demodulation on the corresponding PUSCH through DMRS. The DMRS port corresponds to the SRS resource indicated by SRI one by one. The role of SRI is to indicate the phase weighting between the transmission antennas used by the terminal device to transmit PUSCH, and the same phase weighting operation is performed on the transmission antennas indicated by the SRS, and the number of transmission layers of PUSCH is also indicated.

[0205] The mapping relationship between the value of the SRI field in the DCI signaling and the SRS resource index is shown in Table 10 below. The first column, the third column and the fifth column of Table 10 represent the value of the SRI field, and the second column, the fourth column and the sixth column represent the SRS resource index indicated by the corresponding value. Wherein, N SRS The number of bits of the SRI field depends on the number of configured SRS resources. When the number of SRS resources is greater than 1, the number of bits of the SRI field is greater than 0. Taking N SRSFor example, for =4, each value of the 4-bit SRI field is used to indicate one or more SRS resources, and the number of SRS resources represents the number of transmission layers. For example, four single-port SRS resources (with index values from 0 to 3) correspond to the precoding matrices [1 0 0 0], [0 1 0 0], [0 0 1 0], and [0 0 0 1], respectively. When the SRI field indicates an index value of 7, SRS resources 1 and 2 are indicated, and the PUSCH transmission adopts two layers, and the precoding matrices of each layer are [0 1 0 0] and [0 0 1 0], respectively.

[0206] Table 10: SRI field example 1

[0207]

[0208] As can be seen from the above indication of the SRS resource (as shown in Table 10), the current uplink can only support non-codebook transmission with a maximum of 4 layers (i.e., rank = 4). However, with the further improvement of terminal device capabilities, terminal devices with more than 4 transmit antennas are increasingly common. The maximum number of transmission layers (i.e., rank) that a terminal device with more than 4 antennas can support is also greater than 4, such as a terminal device with 8 antennas that can support uplink transmission with a maximum of 8 layers (i.e., rank = 8). Therefore, the indication of the SRS resource for non-codebook transmission with more than 4 antenna ports also needs to be explored.

[0209] For uplink transmission based on a codebook, the embodiments of the present application provide an information indication method, device, and readable storage medium, which can support the combined indication of the number of transmission layers and the TPMI index for more than 4 antenna ports and the indication of the DMRS port index, and can reduce the indication overhead without affecting compatibility. In other words, the embodiments of the present application can maximize the reuse of the optional combination table of the number of transmission layers (from 1 layer to 4 layers) and the TPMI index (Table 5) and the indication table of the DMRS port index (Tables 6 to 9) for 4 antenna ports, reduce the combined indication overhead of the number of transmission layers and the TPMI index for more than 4 antenna ports and the indication overhead of the DMRS port index for more than 4 antenna ports without affecting the combined indication of the number of transmission layers and the TPMI index for 4 antenna ports and the indication of the DMRS port index, and reduce redundancy.

[0210] For non-codebook transmission, the embodiments of the present application provide an information indication method, device, and readable storage medium, which can support the indication of the SRS resource index for more than 4 SRS resources, thereby supporting non-codebook transmission with more than 4 layers, and further improving transmission performance.

[0211] The technical solutions provided by the present application will be described in detail below in combination with more drawings.

[0212] For the purpose of clearly describing the technical solutions of the present application, the present application is described through multiple embodiments, and specific reference is made to the following. In the present application, the same or similar parts between various embodiments or implementation manners can be mutually referenced, unless otherwise specified. In the various embodiments of the present application, and the various implementation manners / implementation methods / realization methods in each embodiment, the terms and / or descriptions between different embodiments, and the various implementation manners / implementation methods / realization methods in each embodiment have consistency and can be mutually referenced, unless otherwise specified and logically conflicted. The technical features in different embodiments, and the various implementation manners / implementation methods / realization methods in each embodiment can be combined to form new embodiments, implementation manners, implementation methods, or realization methods according to their inherent logical relationship. The implementation manners of the present application described below do not constitute a limitation on the protection scope of the present application.

[0213] Embodiment one

[0214] Embodiment one of the present application mainly introduces the correspondence relationship based on low rank (such as rank = 1 ~ 4) and high rank (such as rank = 5 ~ 8), encodes the combination of rank = 1 ~ 8 and the TPMI index corresponding to each rank in a table, and encodes the DMRS port index of two ranks with a corresponding relationship in a table according to the correspondence relationship, so as to jointly determine the rank, TPMI index and DMRS port index to be used through the two tables.

[0215] Reference Figure 4 , Figure 4 is the first flowchart of the information indication method provided by the embodiment of the present application. The terminal device involved in the method can have more than 4 transmission antennas, such as the terminal device in the present application having 6 transmission antennas or 8 transmission antennas. As shown in Figure 4 , the information indication method includes but is not limited to the following steps:

[0216] S101, the network device sends first indication information and second indication information, the first indication information is used to indicate the combination of the number of transmission layers and the TPMI index, the number of transmission layers and the TPMI index correspond to each other, the first indication information has at least a first value, the first value indicates a plurality of combinations of the number of transmission layers and the TPMI index, the plurality of combinations includes a first combination and a second combination; the second indication information is used to indicate the DMRS port index; the value of the second indication information belongs to one of a plurality of sets, the plurality of sets at least includes a first set and a second set, when the second indication information is a value in the first set, the DMRS port index is associated with the first combination, when the second indication information is a value in the second set, the DMRS port index is associated with the second combination.

[0217] Correspondingly, the terminal device receives the first indication information and the second indication information.

[0218] In S102, the terminal device determines a combination from the multiple combinations according to a value of the second indication information.

[0219] Optionally, the first indication information and the second indication information can be carried in one signaling or in different signaling, which is not limited in the embodiments of the present application. For example, the first indication information and the second indication information can be carried in a downlink control information (DCI) signaling. For example, the first indication information can be a precoding information and number of layers field in the DCI signaling, which is used to indicate a combination of a transmission rank and a TPMI index corresponding to the transmission rank; the second indication information can be an antenna port field in the DCI signaling, which is used to indicate a DMRS port index.

[0220] Optionally, the first indication information (such as the precoding information and number of layers field) has at least one value (referred to as the first value for convenience of description), which indicates multiple combinations of a transmission rank and a TPMI index. The transmission rank and the TPMI index correspond to each other, for example, the number of layers of a precoding matrix identified by the transmission rank and the TPMI index is the same. One of the transmission ranks and the TPMI index corresponding to the transmission rank is a combination. For example, the multiple combinations at least include a first combination and a second combination. The transmission rank in the first combination is one of 1, 2, 3, and 4, and the transmission rank in the second combination is one of 5, 6, 7, and 8. In other words, the transmission rank in the first combination and the transmission rank in the second combination have a corresponding relationship. For example, taking 8 antenna ports as an example, when the transmission rank in the first combination is 1, the transmission rank in the second combination is 5; when the transmission rank in the first combination is 2, the transmission rank in the second combination is 6; when the transmission rank in the first combination is 3, the transmission rank in the second combination is 7; and when the transmission rank in the first combination is 4, the transmission rank in the second combination is 8. Alternatively, when the transmission rank in the first combination is 1, the transmission rank in the second combination is 8; when the transmission rank in the first combination is 2, the transmission rank in the second combination is 7; when the transmission rank in the first combination is 3, the transmission rank in the second combination is 6; and when the transmission rank in the first combination is 4, the transmission rank in the second combination is 5. Of course, the transmission rank in the first combination and the transmission rank in the second combination can have other corresponding relationships, which are not limited to the above examples, and the embodiments of the present application do not limit the corresponding relationship between the transmission ranks.

[0221] Optionally, the value of the second indication information (e.g., the antenna port field) belongs to one of a plurality of sets, each set including at least one value, the plurality of sets including at least a first set and a second set. When the value of the second indication information is a value in the first set, the DMRS port index indicated by the second indication information is associated with the first combination, e.g., the number of the DMRS port index indicated by the second indication information is the same as the number of ranks in the first combination. When the value of the second indication information is a value in the second set, the DMRS port index indicated by the second indication information is associated with the second combination, e.g., the number of the DMRS port index indicated by the second indication information is the same as the number of ranks in the second combination. In other words, the DMRS port index indicated by the antenna port field corresponds to different number of ranks when the antenna port field takes values in different sets.

[0222] It can be understood that in order to support uplink transmission of more than 4 layers, the indication of rank, TPMI index and DMRS port index needs to be designed. The following illustrates how the first indication information (e.g., the precoding information and the number of layers field) indicates the combination of the number of transmission layers (i.e., rank) and TPMI index, and how the second indication information (e.g., the antenna port field) indicates the DMRS port index in the embodiments of the present application.

[0223] In one example, taking 8 antenna ports (maximum 8-layer uplink transmission) as an example, a one-to-one correspondence relationship is established between rank = 5 ~ 8 and rank = 1 ~ 4. Taking rank = 1 corresponding to rank = 5, rank = 2 corresponding to rank = 6, rank = 3 corresponding to rank = 7, and rank = 4 corresponding to rank = 8 as an example.

[0224] (1) According to the correspondence described above, the embodiment of the present application encodes the combination of rank = 1 ~ 4 and the TPMI index corresponding thereto respectively, and the combination of rank = 5 ~ 8 and the TPMI index corresponding thereto respectively in a table. As shown in Table 11 below, Table 11 shows the optional combination of the TPMI index and the number of transmission layers of 8 antenna ports, that is, Table 11 shows the optional combination of 1 layer to 8 layers and the TPMI index corresponding thereto respectively. Among them, the first column, the third column and the fifth column in Table 11 represent the value of the first indication information (such as the precoding information and the layer number field) described above. The second column, the fourth column and the sixth column of Table 11 represent the optional combination of the number of transmission layers and the TPMI index under different antenna capabilities respectively. As can be seen from Table 11, there is at least one value of the first indication information (such as the precoding information and the layer number field), which indicates multiple combinations of the number of transmission layers and the TPMI index. For example, the antenna capability of the terminal device is fully coherent (Fully coherent), the value of the precoding information and the layer number field is 1, the first value = 1, which indicates two combinations of the number of transmission layers and the TPMI index: the first combination: rank = 1 and TPMI = 1; the second combination: rank = 5 and TPMI = 1. For another example, the first value can be 8, which indicates two combinations of the number of transmission layers and the TPMI index: the first combination: rank = 2 and TPMI = 0; the second combination: rank = 6 and TPMI = 0.

[0225] It can be understood that one TPMI index in Table 11 identifies one precoding matrix, and the present application does not limit the precoding matrix identified by the TPMI index in Table 11.

[0226] Table 11: Optional combination of TPMI index and number of transmission layers (i.e. rank) of 8 antenna ports (transform precoder is not turned on, ul-FullPowerTransmission is not configured or is configured as fullpowerMode2 or fullpower)

[0227]

[0228]

[0229]

[0230]

[0231]

[0232]

[0233]

[0234]

[0235]

[0236]

[0237]

[0238]

[0239]

[0240]

[0241]

[0242] It can be understood that for the precoding codebook, as shown in the aforementioned Table 1 to the aforementioned Table 4, it can be seen that the number of selectable precoding matrices in the codebook set decreases with the increase of the number of transmission layers (i.e., rank) when the number of antenna ports is unchanged. Then, the range of TPMI index corresponding to rank = 5-8 under 8 antenna ports is not greater than the range of TPMI index corresponding to rank = 1-4 under 8 antenna ports. Therefore, part of the values of the first indication information (such as the precoding information and the rank field) in Table 11 indicate 2 combinations of the number of transmission layers (i.e., rank) and TPMI index, and the other part of the values indicate 1 combination of the number of transmission layers (i.e., rank) and TPMI index.

[0243] The embodiment of the present application establishes the corresponding relationship between rank = 1-4 and rank = 5-8, and based on the corresponding relationship, there is at least one value of the first indication information (such as the precoding information and the rank field), which indicates multiple combinations of the number of transmission layers and TPMI index, i.e., the indication of 2 ranks and corresponding TPMI index is encoded in the same row of the table, corresponding to the same indication index value, which reduces the indication overhead compared with the extension of the combination indication of the number of transmission layers and TPMI index of 8 antenna ports according to the combination indication mode of the number of transmission layers and TPMI index of 4 antenna ports in the NR protocol. It can be understood that the combination indication mode of the number of transmission layers and TPMI index of 4 antenna ports in the NR protocol is that one value indicates one combination of the number of transmission layers and TPMI index. Because the selectable combinations of the number of transmission layers and TPMI index of 8 antenna ports are more than the selectable combinations of the number of transmission layers and TPMI index of 4 antenna ports, the indication bits required by 8 antenna ports are more than the indication bits required by 4 antenna ports (as shown in the aforementioned Table 5, 4 antenna ports require 6 bits (2 6If 8 antenna ports still use the same indication manner as 4 antenna ports (i.e. one value of precoding information and number of layers field indicates one combination of number of transmission layers and TPMI index), more indication bits are needed for 8 antenna ports, at least 9 bits (2 9 = 512), while the embodiment of the present application in Table 11 only needs 8 bits (2 8 = 256) to indicate. Therefore, the embodiment of the present application reduces 1 bit of indication overhead.

[0244] (2) According to the above correspondence (rank = 1 corresponds to rank = 5, rank = 2 corresponds to rank = 6, rank = 3 corresponds to rank = 7, rank = 4 corresponds to rank = 8), the embodiment of the present application encodes the DMRS port indexes corresponding to rank = 1 and rank = 5 in a table respectively, as shown in the following Table 12a and Table 12b; encodes the DMRS port indexes corresponding to rank = 2 and rank = 6 in a table respectively, as shown in the following Table 13a and Table 13b; encodes the DMRS port indexes corresponding to rank = 3 and rank = 7 in a table respectively, as shown in the following Table 14a and Table 14b; encodes the DMRS port indexes corresponding to rank = 4 and rank = 8 in a table respectively, as shown in the following Table 15a and Table 15b. Table 12a, Table 13a, Table 14a and Table 15a take double-symbol Type 1 DMRS as an example, while Table 12b, Table 13b, Table 14b and Table 15b take double-symbol Type 2 DMRS as an example. For ease of description, the following takes double-symbol Type 1 DMRS as an example for example description.

[0245] The first column in Tables 12a to 15b represents the value of the second indication information (e.g., the antenna port field), and the third column represents the DMRS port index indicated by the corresponding value. The meanings of the parameters in the second and fourth columns in Tables 12a to 15b can be referred to the existing standards or protocols, which are not described in detail herein. For example, the value of the second indication information can belong to one of a plurality of sets, which include a first set and a second set, and the first set and the second set can be distinguished by the number of DMRS port indexes. Specifically, each value in the same set indicates the same number of DMRS port indexes, and the values in different sets indicate different numbers of DMRS port indexes, that is, the number of DMRS port indexes indicated by any value in the first set is different from the number of DMRS port indexes indicated by any value in the second set. For example, for Table 12a, the first set is 0 to 13 (including 0 and 13), and the second set is 14; for Table 12b, the first set is 0 to 27 (including 0 and 27), and the second set includes 28 and 29. For Table 13a, the first set is 0 to 9 (including 0 and 9), and the second set is 10; for Table 13b, the first set is 0 to 18 (including 0 and 18), and the second set includes 19 and 20. For Table 14a, the first set is 0 to 2 (including 0 and 2), and the second set is 3; for Table 14b, the first set is 0 to 5 (including 0 and 5), and the second set is 6. For Table 15a, the first set is 0 to 3 (including 0 and 3), and the second set is 4; for Table 15b, the first set is 0 to 4 (including 0 and 4), and the second set is 5.

[0246] Table 12a: DMRS port index, dmrs-Type=1, maximum number of DMRS symbols is 2, rank=1 and 5

[0247]

[0248] Table 12b: DMRS port index, dmrs-Type=2, maximum number of DMRS symbols is 2, rank=1 and 5

[0249]

[0250]

[0251] It can be understood that the table 12a uses the reserved values (14 or 15) of the DMRS port index table corresponding to rank = 1 (the aforementioned table 6) to indicate the DMRS port index corresponding to rank = 5. It can also be understood that the table 12a is only an example, and which reserved value (14 or 15) is used to indicate the DMRS port index corresponding to rank = 5 is not limited in the embodiments of the present application. In addition, the DMRS port index corresponding to rank = 5 can be any 5 of 0, 1, 2, 3, 4, 5, 6, 7, and the DMRS port index corresponding to rank = 5 in the embodiments of the present application is not limited to the DMRS port index (i.e. 0, 1, 2, 3, 4) shown in the aforementioned table 12a. The table 12b is similar to the table 12a, and will not be described one by one here.

[0252] Table 13a: DMRS port index, dmrs-Type = 1, maximum number of DMRS symbols is 2, rank = 2 and 6

[0253]

[0254]

[0255] Table 13b: DMRS port index, dmrs-Type = 2, maximum number of DMRS symbols is 2, rank = 2 and 6

[0256]

[0257] It can be understood that the table 13a uses the reserved values (10 to 15) of the DMRS port index table corresponding to rank = 2 (the aforementioned table 7) to indicate the DMRS port index corresponding to rank = 6. It can also be understood that the table 13a is only an example, and which reserved value (any one of 10 to 15) is used to indicate the DMRS port index corresponding to rank = 6 is not limited in the embodiments of the present application. In addition, the DMRS port index corresponding to rank = 6 can be any 6 of 0, 1, 2, 3, 4, 5, 6, 7, and the DMRS port index corresponding to rank = 6 in the embodiments of the present application is not limited to the DMRS port index (i.e. 0, 1, 2, 3, 4, 6) shown in the aforementioned table 13a. The table 13b is similar to the table 13a, and will not be described one by one here.

[0258] Table 14a: DMRS port index, dmrs-Type = 1, maximum number of DMRS symbols is 2, rank = 3 and 7

[0259]

[0260] Table 14b: DMRS port index, dmrs-Type = 2, maximum number of DMRS symbols is 2, rank = 3 and 7

[0261]

[0262]

[0263] It can be understood that the table 14a indicates the DMRS port index corresponding to rank=7 by using the reserved values (3 to 15) of the DMRS port index table corresponding to rank=3 (the aforementioned table 8). It can also be understood that the table 14a is only an example, and any one of the reserved values (3 to 15) is used to indicate the DMRS port index corresponding to rank=7, which is not limited in the embodiments of the present application. In addition, the DMRS port index corresponding to rank=7 can be any 7 of 0, 1, 2, 3, 4, 5, and 6, and the DMRS port index corresponding to rank=7 in the embodiments of the present application is not limited to the DMRS port index (i.e. 0, 1, 2, 3, 4, 5, and 6) shown in the aforementioned table 14a. The table 14b is similar to the table 14a, which is not described one by one here.

[0264] Table 15a: DMRS port index, dmrs-Type=1, maximum number of DMRS symbols is 2, rank=4 and 8

[0265]

[0266] Table 15b: DMRS port index, dmrs-Type=2, maximum number of DMRS symbols is 2, rank=4 and 8

[0267]

[0268] It can be understood that the table 15a indicates the DMRS port index corresponding to rank=8 by using the reserved values (4 to 15) of the DMRS port index table corresponding to rank=4 (the aforementioned table 9). It can also be understood that the table 15a is only an example, and any one of the reserved values (4 to 15) is used to indicate the DMRS port index corresponding to rank=8, which is not limited in the embodiments of the present application. The table 15b is similar to the table 15a, which is not described one by one here.

[0269] It can be understood that the aforementioned tables 12a to 15b are taken as an example of double-symbol Type 1 DMRS and double-symbol Type 2 DMRS, and the aforementioned DMRS port index table is only an example. The same is applicable to other DMRS types, such as single-symbol Type 1 DMRS and Type 2 DMRS.

[0270] It can be understood that, in order to ensure that the DCI signaling lengths corresponding to different transmission layers (i.e., ranks) are the same, a large number of reserved options appear in the DMRS port index table. As shown in the foregoing table 6 to the foregoing table 9, the DMRS port index indication overhead corresponding to rank = 1 ~ 4 is 4 bits, wherein there are 2 reserved options in the DMRS port index table corresponding to rank = 1 (such as the foregoing table 6), there are 6 reserved options in the DMRS port index table corresponding to rank = 2 (such as the foregoing table 7), there are 13 reserved options in the DMRS port index table corresponding to rank = 3 (such as the foregoing table 8), and there are 12 reserved options in the DMRS port index table corresponding to rank = 4 (such as the foregoing table 9). Therefore, it can be known that, with the increase of the transmission layers (i.e., ranks), the optional combinations of the DMRS port indexes are less and less. That is, the number of optional combinations of the DMRS port indexes corresponding to rank = 5 ~ 8 is less than the number of optional combinations of the DMRS port indexes corresponding to rank = 1 ~ 4.

[0271] Based on this, the embodiment of the present application encodes the DMRS port indexes corresponding to two ranks with a corresponding relationship in a table, and uses the reserved values (or redundant bits) in the DMRS port index table corresponding to rank = 1 ~ 4 in the existing NR protocol to indicate the DMRS port indexes corresponding to rank = 5 ~ 8, without increasing the bit overhead of the DMRS port index indication; and without the need to additionally increase 4 DMRS port index tables, the redundant indication bits can be reduced.

[0272] It can be understood that the foregoing corresponding relationship (rank = 1 corresponds to rank = 5, rank = 2 corresponds to rank = 6, rank = 3 corresponds to rank = 7, and rank = 4 corresponds to rank = 8) has a fixed offset, and the optional combination indication of the rank and TPMI index and the DMRS port index indication based on the corresponding relationship are simpler and more direct.

[0273] It can be understood that although the above examples (Tables 11 to 15b) are all taken as an example of 8 antenna ports, maximum supporting 8 layers of uplink transmission, the present application can also be applicable to other transmission layer numbers greater than 4 layers of uplink transmission, such as maximum 6 layers of uplink transmission. The implementation mode of the first indication information and the second indication information under 6 antenna ports (i.e. the combined indication mode of rank and TPMI index, and the indication mode of DMRS port index) can refer to the implementation mode under 8 antenna ports, which will not be described one by one here. Under 6 antenna ports, rank = 5 ~ 6 and rank = 1 ~ 2 can be established a one-to-one correspondence relationship, rank = 1 corresponds to rank = 5, and rank = 2 corresponds to rank = 6; under 6 antenna ports, how to indicate the combination of the transmission layer number (i.e. rank) and the TPMI index, and how to indicate the DMRS port index can refer to the indication mode under 8 antenna ports, which will not be described one by one here. It can also be understood that the following is described by taking 8 antenna ports as an example for ease of description.

[0274] Optionally, at the sending end, the network device can jointly indicate the transmission layer number (i.e. rank) configured for the terminal device, the TPMI index and the DMRS port index in combination with the above Tables 11 and 12a to 15b. For example, based on the above Table 11, if the network device wants to indicate this combination of rank = 5, TPMI = 2, the network device needs to set the value of the first indication information to 2, and needs to set the value of the second indication information to the value in the second set (such as 14 in Table 12a).

[0275] Correspondingly, at the receiving end, the terminal device can determine the transmission rank, TPMI index and DMRS port index indicated by the network device, by combining the first indication information (such as precoding information and rank field) and the second indication information (such as antenna port field) received and the antenna capability of the terminal device. In one possible implementation, after receiving the first indication information (such as precoding information and rank field) and the second indication information (such as antenna port field), the terminal device determines the DMRS port index table according to the transmission rank in the multiple combinations, and then determines the values contained in the first set and the values contained in the second set; and then determines a combination from the multiple combinations according to which set the value of the second indication information belongs to and the antenna capability of the terminal device. For example, if the value of the second indication information belongs to the first set, the terminal device determines the first combination, and the transmission rank and TPMI index in the first combination are the transmission rank and TPMI configured by the network device for uplink transmission of the terminal device. If the value of the second indication information belongs to the second set, the terminal device determines the second combination, and the transmission rank and TPMI index in the second combination are the transmission rank and TPMI configured by the network device for uplink transmission of the terminal device. For example, if the value of the first indication information is 0 and the antenna capability of the terminal device is Partial coherent, the multiple combinations indicated are the first combination: rank = 1, TPMI = 0, and the second combination: rank = 5, TPMI = 0. The terminal device can determine that the transmission ranks in the multiple combinations are 1 and 5, and then determine the DMRS port index table to be Table 12a (for example, for double-symbol Type 1 DMRS). As shown in Table 12a, the first set is 0-13, and the second set is 14. If the value of the second indication information is one of 0 to 13, for example, 5, which belongs to the first set, the terminal device can determine that the network device indicates the first combination: rank = 1, TPMI = 0. If the value of the second indication information is 14, which belongs to the second set, the terminal device can determine that the network device indicates the second combination: rank = 5, TPMI = 0.

[0276] In another possible implementation, after receiving the first indication information (such as precoding information and the number of layers field) and the second indication information (such as the antenna port field), the terminal device can determine which DMRS port indexes are indicated by the second indication information according to the number of transmission layers in the multiple combinations and the value of the second indication information, and then determine a combination from the multiple combinations according to the number of DMRS port indexes indicated by the second indication information and the antenna capability of the terminal device. For example, if the number of DMRS port indexes indicated by the second indication information is the same as the number of transmission layers in the first combination, the terminal device determines the first combination, and the number of transmission layers and the TPMI index in the first combination are the number of transmission layers and the TPMI configured by the network device for uplink transmission of the terminal device. If the number of DMRS port indexes indicated by the second indication information is the same as the number of transmission layers in the second combination, the terminal device determines the second combination, and the number of transmission layers and the TPMI index in the second combination are the number of transmission layers and the TPMI configured by the network device for uplink transmission of the terminal device.

[0277] For example, assuming that the value of the first indication information is 3, if the antenna capability of the terminal device is Partial coherent, the two combinations of the indicated rank and TPMI are: rank = 1 and TPMI = 3 (i.e., the first combination); and rank = 5 and TPMI = 3 (i.e., the second combination). The terminal device can determine that the rank indicated by the network device is 1 or 5. Taking double-symbol Type 1 DMRS as an example, the corresponding DMRS port index table is Table 12a. If the value of the second indication information is one of 0 to 13, for example, 0, it indicates that the rank indicated by the network device is 1, and the corresponding DMRS port index is 0, and accordingly it can be determined that the TPMI is 3. If the value of the second indication information is 14, it indicates that the rank indicated by the network device is 5, and the corresponding DMRS port index is 0 to 4, and accordingly it can be determined that the TPMI is 3.

[0278] The terminal device according to the embodiments of the present application determines one or more rank values and the TPMI indexes corresponding to the one or more rank values through the value of the first indication information, determines a specific rank value and a DMRS port index according to the value of the second indication information, and further determines the TPMI index corresponding to the rank value. Not only can it support the combination indication of the number of transmission layers (maximum 8 layers) and the TPMI index of 8 antenna ports and the indication of the DMRS port index of 8 antenna ports, but also can reduce the indication overhead, and further can support uplink transmission of maximum 8 layers, thereby improving the transmission performance.

[0279] Another example is that rank=1 corresponds to rank=8, rank=2 corresponds to rank=7, rank=3 corresponds to rank=6, and rank=4 corresponds to rank=5.

[0280] (1) According to the above correspondence, the embodiment of the present application encodes the combination of rank=1~4 and the TPMI index corresponding thereto respectively, and the combination of rank=5~8 and the TPMI index corresponding thereto respectively in a table. As shown in Table 16 below, Table 16 shows the optional combination of the TPMI index and the number of transmission layers of 8 antenna ports, that is, Table 16 shows the optional combination of 1 layer to 8 layers and the TPMI index corresponding thereto respectively. Among them, the first column, the third column and the fifth column in Table 16 represent the value of the first indication information (such as precoding information and layer number field). The second column, the fourth column and the sixth column of Table 16 represent the optional combination of the number of transmission layers and the TPMI index under different antenna capabilities respectively. As can be seen from Table 16, there is at least one value of the first indication information (such as precoding information and layer number field), which indicates multiple combinations of the number of transmission layers and the TPMI index. For example, the antenna capability of the terminal device is fully coherent (Fully coherent), and the value of the precoding information and the layer number field is 8, which indicates two combinations of the number of transmission layers and the TPMI index: rank=2 and TPMI=0; rank=7 and TPMI=0.

[0281] It can be understood that one TPMI index in Table 16 identifies one precoding matrix, and the present application does not limit the precoding matrix identified by the TPMI index in Table 16.

[0282] Table 16: Optional combination of TPMI index and number of transmission layers (i.e. rank) of 8 antenna ports (transform precoder is not turned on, ul-FullPowerTransmission is not configured, or is configured as fullpowerMode2 or fullpower)

[0283]

[0284]

[0285]

[0286]

[0287]

[0288]

[0289]

[0290]

[0291]

[0292]

[0293]

[0294]

[0295]

[0296]

[0297] It can be understood that, as the number of transmission layers (i.e., rank) increases, the number of selectable precoding matrices in the codebook set decreases. Then, the range of TPMI indexes corresponding to rank = 5-8 under 8 antenna ports is not greater than the range of TPMI indexes corresponding to rank = 1-4 under 8 antenna ports.

[0298] The embodiment of the present application establishes the correspondence between rank = 1-4 and rank = 5-8, and based on the correspondence, the first indication information (such as precoding information and layer number field) has at least one value, which indicates a plurality of combinations of the number of transmission layers and TPMI indexes, i.e., 2 kinds of rank and the indication of corresponding TPMI indexes are encoded in the same row of the table, corresponding to the same indication index value, compared with extending the combination indication of the number of transmission layers and TPMI indexes of 8 antenna ports according to the combination indication mode of the number of transmission layers and TPMI indexes of 4 antenna ports in the NR protocol, the indication overhead is reduced.

[0299] (2) Taking double-symbol Type 1 DMRS as an example, according to the above correspondence (rank = 1 corresponds to rank = 8, rank = 2 corresponds to rank = 7, rank = 3 corresponds to rank = 6, and rank = 4 corresponds to rank = 5), the embodiment of the present application encodes the DMRS port indexes corresponding to rank = 1 and rank = 8 in a table, as shown in Table 17 below; encodes the DMRS port indexes corresponding to rank = 2 and rank = 7 in a table, as shown in Table 18 below; encodes the DMRS port indexes corresponding to rank = 3 and rank = 6 in a table, as shown in Table 19 below; and encodes the DMRS port indexes corresponding to rank = 4 and rank = 5 in a table, as shown in Table 20 below.

[0300] The first column in Tables 17 to 20 indicates the value of the second indication information (e.g., the antenna port field), and the third column indicates the DMRS port index indicated by the corresponding value. The meanings of the parameters in the second and fourth columns in Tables 17 to 20 can be referred to the existing standards or protocols, which are not described one by one here. For example, the value of the second indication information can belong to one of a plurality of sets, which include a first set and a second set, and the first set and the second set can be distinguished by the number of DMRS port indexes. Specifically, each value in the same set indicates the same number of DMRS port indexes, and the values in different sets indicate different numbers of DMRS port indexes, that is, the number of DMRS port indexes indicated by any value in the first set is different from the number of DMRS port indexes indicated by any value in the second set. The first set and the second set are not listed one by one here.

[0301] Table 17: DMRS port index, dmrs-Type=1, maximum number of DMRS symbols is 2, rank=1 and 8

[0302]

[0303] It can be understood that Table 17 uses the reserved values (14 and 15) of the DMRS port index table corresponding to rank=1 (the aforementioned Table 6) to indicate the DMRS port index corresponding to rank=8. It can also be understood that in order to make the DMRS occupy one code division multiplexing (CDM) group, the DMRS port index corresponding to rank=8 can be: 2, 3, 6, 7, 10, 11, 14, 15, in addition to the DMRS port index indicated by value=14 in Table 17 (i.e., 0, 1, 4, 5, 8, 9, 12, 13).

[0304] Table 18: DMRS port index, dmrs-Type=1, maximum number of DMRS symbols is 2, rank=2 and 7

[0305]

[0306]

[0307] It can be understood that Table 18 indicates the DMRS port indexes corresponding to rank = 7 by using the reserved values (10 to 15) of the DMRS port index table corresponding to rank = 2 (the aforementioned Table 7). It can also be understood that Table 17 is merely an example, and which reserved values (10 to 15) are used to indicate the DMRS port indexes corresponding to rank = 7 is not limited by the embodiments of the present application. In addition, the DMRS port indexes corresponding to rank = 7 can be any 7 of 0, 1, 2, 3, 4, 5, 6, and 7, and the embodiments of the present application are not limited to the DMRS port indexes (i.e., 0, 1, 2, 3, 4, 5, and 6) indicated by value = 10 and 12 in the aforementioned Table 18.

[0308] It can be understood that, in order to make the DMRS occupy one code division multiplexing (CDM) group, the DMRS port indexes corresponding to rank = 7 can be any 7 of 0, 1, 4, 5, 8, 9, 12, and 13 or any 7 of 2, 3, 6, 7, 10, 11, 14, and 15, and the embodiments of the present application are not limited to the DMRS port indexes (i.e., 0, 1, 4, 5, 8, and 9) indicated by value = 14 in the aforementioned Table 18.

[0309] Table 19: DMRS port indexes, dmrs-Type = 1, maximum number of DMRS symbols is 2, rank = 3 and 6

[0310]

[0311] It can be understood that Table 19 indicates the DMRS port indexes corresponding to rank = 6 by using the reserved values (3 to 15) of the DMRS port index table corresponding to rank = 3 (the aforementioned Table 8). It can also be understood that Table 19 is merely an example, and which reserved values (3 to 15) are used to indicate the DMRS port indexes corresponding to rank = 6 is not limited by the embodiments of the present application. In addition, the DMRS port indexes corresponding to rank = 6 can be any 6 of 0, 1, 2, 3, 4, 5, 6, and 7, and the embodiments of the present application are not limited to the DMRS port indexes (i.e., 0, 1, 2, 3, 4, and 6) indicated by value = 3 and 5 in the aforementioned Table 19.

[0312] It can be understood that, in order to make the DMRS occupy one code division multiplexing (CDM) group, the DMRS port indexes corresponding to rank = 6 can be any 6 of 0, 1, 4, 5, 8, 9, 12, and 13 or any 6 of 2, 3, 6, 7, 10, 11, 14, and 15, and the embodiments of the present application are not limited to the DMRS port indexes (i.e., 0, 1, 4, 5, 8, and 9) indicated by value = 4 in the aforementioned Table 19.

[0313] Table 20: DMRS port indexes, dmrs-Type = 1, maximum number of DMRS symbols is 2, rank = 4 and 5

[0314]

[0315]

[0316] It can be understood that the table 20 indicates the DMRS port indexes corresponding to rank=5 by using the reserved values (4 to 15) of the DMRS port index table (the aforementioned table 9) corresponding to rank=4. It can also be understood that the table 20 is only an example, and the application embodiments do not limit which reserved values (4 to 15) are used to indicate the DMRS port indexes corresponding to rank=5. In addition, the DMRS port indexes corresponding to rank=5 can be any 5 of 0, 1, 2, 3, 4, 5, 6, 7 or any 5 of 8-15, and the application embodiments are not limited to the DMRS port indexes (namely 0-4 and 8-12 and 3, 4, 5, 6, 7) indicated by value=4, 5, 7 and 9 in the aforementioned table 20.

[0317] It can be understood that in order to make the DMRS occupy one code division multiplexing (CDM) group, the DMRS port indexes corresponding to rank=5 can be any 5 of 0, 1, 4, 5, 8, 9, 12, 13 or any 5 of 2, 3, 6, 7, 10, 11, 14, 15, and the application embodiments are not limited to the DMRS port indexes (namely 0, 1, 4, 5, 8 and 5, 8, 9, 12, 13) indicated by value=6 and 8 in the aforementioned table 20.

[0318] It can be understood that as the number of transmission layers (namely rank) increases, the number of optional combinations of DMRS port indexes decreases. Then, the number of optional combinations of DMRS port indexes corresponding to rank=5-8 is not more than the number of optional combinations of DMRS port indexes corresponding to rank=1-4.

[0319] Based on this, the application embodiments encode the DMRS port indexes of two ranks with a corresponding relationship in one table, and use the reserved values (or redundant bits) in the DMRS port index table corresponding to rank=1-4 in the existing NR protocol to indicate the DMRS port indexes corresponding to rank=5-8; without the need to additionally increase four DMRS port index tables, no additional indication information overhead is introduced, and the redundant indication bits can be reduced.

[0320] In addition, because the number of optional codebooks gradually decreases and the number of DMRS port combinations gradually decreases as the number of transmission layers (i.e., rank) increases, that is, from rank = 1 to rank = 8, the above correspondence (rank = 1 corresponds to rank = 8, rank = 2 corresponds to rank = 7, rank = 3 corresponds to rank = 6, and rank = 4 corresponds to rank = 5) is used to encode the maximum number of transmission layers (1 layer) of DMRS port index combination and the minimum number of transmission layers (8 layers) of DMRS port index combination in a table, which can maximize the use of existing redundant indication bits and save overhead. For example, for the case of DMRS port index extension, rank = 5 corresponds to DMRS port index that needs 6 values to indicate. If rank = 1 and rank = 5 correspond to DMRS port index in a DMRS port index table, because there are only 2 reserved options in the DMRS port index table corresponding to rank = 1 (such as the above table 6), 1 bit needs to be added to indicate.

[0321] It can be understood that although the above examples (tables 11 to 15b) are all examples of 8 antenna ports and maximum support of 8 layers of uplink transmission, the present application can also be applied to other transmission layers of uplink transmission greater than 4 layers, such as maximum 6 layers of uplink transmission. The implementation mode of the first indication information and the second indication information under 6 antenna ports (i.e., the combination indication mode of rank and TPMI index, and the indication mode of DMRS port index) can refer to the implementation mode under 8 antenna ports, which will not be described here.

[0322] Optionally, at the sending end, the network device can jointly indicate the transmission layer number (i.e., rank), TPMI index and DMRS port index configured for the terminal device in combination with the above table 16 and tables 17 to 20. For details, refer to the foregoing description, which will not be described here. Correspondingly, at the receiving end, the terminal device can determine the transmission layer number (i.e., rank), TPMI index and DMRS port index indicated by the network device in combination with the received first indication information (such as precoding information and layer number field) and the second indication information (such as antenna port field) and its own antenna capability. For details of the determination mode, refer to the foregoing description, which will not be described here.

[0323] The embodiment of the present application associates low rank (such as rank = 1-4) and high rank (such as rank = 5-8), so that one low rank and its corresponding TPMI index and one high rank and its corresponding TPMI index are encoded in one table. Compared with the extension of the combination indication of the number of transmission layers and the TPMI index of more than 4 antenna ports according to the combination indication mode of the number of transmission layers and the TPMI index of 4 antenna ports in the NR protocol, the indication overhead can be reduced; and the TPMI index corresponding to the low rank is unchanged, so that the TPMI index indication of rank = 1-4 is not affected. In addition, the embodiment of the present application also multiplexes the DMRS port index table corresponding to rank = 1-4 of the existing 4 antenna ports, and uses the redundant bits (or reserved values) in the DMRS port index table corresponding to rank = 1-4 of the 4 antenna ports based on the established rank correspondence to indicate the DMRS port index corresponding to rank = 5-8, so that no additional DMRS port index table is needed, and therefore no additional indication information overhead is introduced, and the redundant indication bits can be reduced. The terminal device of the embodiment of the present application jointly determines the number of transmission layers (i.e., rank), TPMI index and DMRS port index when performing uplink transmission by the value of the first indication information and the value of the second indication information and its own antenna capability.

[0324] Therefore, the embodiment of the present application can not only support the combination indication of the number of transmission layers and the TPMI index of more than 4 antenna ports and the DMRS port index indication of more than 4 antenna ports, but also reduce the indication overhead without affecting compatibility.

[0325] Embodiment two

[0326] The second embodiment of the present application mainly introduces the correspondence between low rank (such as rank = 1-4) and high rank (such as rank = 5-8), encodes the combination of rank = 1-8 and its corresponding TPMI index in one table, and at least one value in the table indicates multiple combinations of the number of transmission layers and the TPMI index, and then indicates which combination in the multiple combinations is allocated to the terminal device by the indication information.

[0327] Referring to Figure 5 , Figure 5 is a second flowchart of the information indication method provided by the embodiment of the present application. The terminal device involved in the method can have more than 4 transmission antennas, such as the terminal device in the present application having 6 transmission antennas or 8 transmission antennas. As shown in Figure 5 , the information indication method includes but is not limited to the following steps:

[0328] S201, the network device sends first indication information and third indication information, the first indication information is used to indicate the combination of the transmission layer number and the TPMI index corresponding to the transmission layer number, the first indication information has at least a first value, and the first value indicates a plurality of combinations of the transmission layer number and the TPMI index; the third indication information indicates one combination in the plurality of combinations.

[0329] Correspondingly, the terminal device receives the first indication information and the third indication information.

[0330] S202, the terminal device determines a combination from the plurality of combinations according to the third indication information.

[0331] Optionally, the first indication information and the third indication information can be carried in one signaling and sent, or can be carried in different signaling and sent, and the embodiments of the application do not limit this. For example, the first indication information and the third indication information can be carried in a downlink control information (DCI) signaling. For example, the first indication information can be a precoding information and number of layers field in the DCI signaling, used to indicate the combination of the transmission layer number (i.e. rank) and the TPMI index corresponding to the transmission layer number; the third indication information can be one or more of the MCS field, the redundancy version field and the new data indicator field in the DCI signaling, such as the third indication information being the MCS field and the redundancy version field. When the MCS field corresponding to a certain codeword in the DCI signaling takes a special value (such as 26) and the redundancy version field corresponding to the codeword also takes a special value (such as 1), it is used to jointly indicate that the codeword is disabled; and when the MCS field corresponding to a certain codeword in the DCI signaling is not 26 or the redundancy version field corresponding to the codeword is not 1, it indicates that the codeword is enabled, at this time the MCS field corresponding to the codeword is used to indicate the scheduling MCS index, and the redundancy version field corresponding to the codeword is used to indicate the redundancy version information of the coding corresponding to the scheduling data.

[0332] Optionally, the implementation of the first indication information (such as the precoding information and the number of layers field) can refer to the related description in the foregoing embodiment one, which will not be repeated here. The optional combination of the TPMI index of the 8 antenna port and the transmission layer number in the embodiments of the application is shown in the foregoing table 11 or the foregoing table 16, which will not be repeated here.

[0333] Understandably, downlink control information (DCI) is used to schedule the transmission of one or more PUSCHs within a cell. DCI includes: a) For transport block 1, it includes the MCS, new data indicator, and redundant version. b) If the higher-layer signaling `maxNrofCodeWordsScheduledByDCI` is configured to 2 (i.e., two codeword transmissions are enabled), it also includes relevant fields for transport block 2: MCS, new data indicator, and redundant version. Specifically, for the preset combination of coding rate and modulation order in the MCS table, a 5-bit MCS field indicates the scheduled MCS. The new data indicator field indicates whether the scheduled PUSCH is newly transmitted or retransmitted data. The redundant version field indicates the redundant version information of the coding corresponding to the scheduled data. The DCI format can be format 0_1 ​​or format 0_2.

[0334] It is also understandable that if the higher-layer signaling maxNrofCodeWordsScheduledByDCI is configured to 2, then when the field corresponding to one of the two transport blocks in the DCI indicates I... MCS =26 and rv id =1 indicates that the transport block is not enabled (or that no data is sent in the transport block, and only one transport block is transmitted). Where I MCS =26 can be understood as the value of the MCS field being 26, rv id =1 can be understood as the redundancy version field value being 1. If the value of the MCS field corresponding to a certain transport block is not 26 or the value of the redundancy version field is not 1, it indicates that the transport block is enabled; in this case, the MCS field is used to indicate the scheduling MCS index, and the redundancy version field is used to indicate the redundancy version information of the encoding corresponding to the scheduled data. When both transport blocks are enabled (i.e., both transport blocks are transmitted), the fields corresponding to transport block 1 and transport block 2 correspond to codeword 0 and codeword 1, respectively. If only one transport block is enabled (only one transport block is transmitted), the enabled transport block corresponds to the first codeword.

[0335] Therefore, the third indication information can indicate the first combination in the plurality of combinations by indicating that one of the two codewords is enabled. For example, the network device sets the value of the MCS field corresponding to one of the transport blocks in the DCI to 26, and sets the value of the redundancy version field to 1, indicating that the transport block is disabled, that is, the codeword corresponding to the transport block is disabled. At this time, one of the two codewords is enabled, and the other codeword is disabled, indicating that the combination of the number of transmission layers and the TPMI index indicated by the first indication information is the first combination in the plurality of combinations. Similarly, the third indication information can indicate the second combination in the plurality of combinations by indicating that the two codewords are enabled. For example, the value of the MCS field corresponding to any one of the transport blocks in the DCI is not 26, or the value of the redundancy version field is not 1, indicating that the two transport blocks are enabled, that is, the codewords corresponding to the two transport blocks are enabled. At this time, the two codewords are enabled, indicating that the combination of the number of transmission layers and the TPMI index indicated by the first indication information is the second combination in the plurality of combinations.

[0336] Optionally, at the receiving end, the terminal device can determine the number of transmission layers (i.e., rank) and the TPMI index indicated by the network device by combining the received first indication information and third indication information and the antenna capability of the terminal device. For example, when the terminal device receives the third indication information indicating that one of the two codewords is enabled, the terminal device determines a first combination from the plurality of combinations in combination with the antenna capability of the terminal device, and the number of transmission layers and the TPMI index in the first combination are the number of transmission layers and the TPMI of the uplink transmission configured by the network device for the terminal device. When the terminal device receives the third indication information indicating that the two codewords are enabled, the terminal device determines a second combination from the plurality of combinations in combination with the antenna capability of the terminal device, and the number of transmission layers and the TPMI index in the second combination are the number of transmission layers and the TPMI of the uplink transmission configured by the network device for the terminal device.

[0337] For example, taking the optional combination of the number of transmission layers and TPMI index of the 8-antenna port shown in Table 11 as an example. Assuming that the value of the first indication information is 8, if the antenna capability of the terminal device is Fully coherent, the 2 combinations of the indicated rank and TPMI are: rank = 2 and TPMI = 0 (i.e., the first combination); rank = 6 and TPMI = 0 (i.e., the second combination). If the third indication information indicates that one of the two codewords is enabled, the terminal device determines that the network device indicates the combination of rank = 2 and TPMI = 0 (i.e., the first combination). If the third indication information indicates that both of the two codewords are enabled, the terminal device determines that the network device indicates the combination of rank = 6 and TPMI = 0 (i.e., the second combination).

[0338] In a possible implementation, the information indication method can further include: the network device sending second indication information, the second indication information being used to indicate DMRS port indexes. No matter what value the second indication information is, the DMRS port indexes indicated by the second indication information are associated with one transmission layer (i.e., rank). That is, for different rank values (rank = 1-8), different DMRS port index tables can be defined in the embodiments of the present application; that is, for one rank value, one DMRS port index table is defined. For example, in addition to the DMRS port indexes corresponding to rank = 5-8 in the foregoing Table 12a to Table 15b (or the foregoing Table 17 to Table 20), 4 DMRS port index tables can be additionally added, and one DMRS port index table includes the DMRS port indexes corresponding to one rank value.

[0339] In another possible implementation, the information indication method can further include:

[0340] S203, the network device sends second indication information, the second indication information being used to indicate DMRS port indexes; the value of the second indication information belongs to one of a plurality of sets, the plurality of sets at least including a first set and a second set, when the second indication information is a value in the first set, the DMRS port indexes are associated with a first combination in the plurality of combinations, and when the second indication information is a value in the second set, the DMRS port indexes are associated with a second combination in the plurality of combinations.

[0341] Correspondingly, the terminal device receives the second indication information.

[0342] S204, the terminal device determines the DMRS port indexes of the terminal device according to the value of the second indication information.

[0343] Optionally, the second indication information can be sent in the same signaling as the first indication information and / or the third indication information, or can be sent in different signaling, which is not limited in the embodiments of the present application. For example, the second indication information can also be carried in the DCI signaling. For example, the second indication information can be an antenna port field in the DCI signaling, which is used to indicate the DMRS port index. The specific implementation of the second indication information (such as the antenna port field) can refer to the related description in the foregoing embodiment one, which will not be repeated here. The DMRS port index table corresponding to different ranks (such as rank = 1-8) in the embodiments of the present application is shown in the foregoing table 12a to table 15b or the foregoing table 17 to table 20, which will not be repeated here.

[0344] It can be understood that the second indication information is associated with the third indication information. For example, if the third indication information indicates that one of the two code words is enabled, the value of the second indication information belongs to the first set; if the third indication information indicates that both of the two code words are enabled, the value of the second indication information belongs to the second set.

[0345] The embodiments of the present application associate rank = 1-4 (referred to as low rank) and rank = 5-8 (referred to as high rank), so that one low rank and its corresponding TPMI index and one high rank and its corresponding TPMI index are encoded in one table, and the TPMI index corresponding to the low rank is unchanged, which not only can support the combination indication of the transmission layer number (from 1 layer to 8 layers) and the TPMI index of 8 antenna ports, but also can reduce the indication overhead without affecting compatibility. In addition, because there is at least one value in the optional combination table of the rank and the TPMI index of the 8 antenna ports designed in the embodiments of the present application indicating multiple combinations, the embodiments of the present application also indicate which combination in the multiple combinations the network device allocates to the terminal device through one indication information, so that the terminal device can uniquely determine the transmission layer number and the TPMI index allocated by the network device. The embodiments of the present application also multiplex the DMRS port index table corresponding to rank = 1-4 of the existing 4 antenna ports, and indicate the DMRS port index corresponding to rank = 5-8 based on the established rank correspondence using the redundant bits (or reserved values) in the DMRS port index table corresponding to rank = 1-4 of the 4 antenna ports, so that the DMRS port index table does not need to be additionally increased, and therefore does not introduce additional indication information overhead, and can reduce the redundant indication bits.

[0346] Embodiment three

[0347] The embodiment three of the application mainly introduces the correspondence relationship based on low rank (such as rank=1~4) and high rank (such as rank=5~8), encodes the DMRS port indexes corresponding to the two ranks with the correspondence relationship in a table, and at least one value in the table indicates a plurality of DMRS port index groups, and then indicates the network device to allocate which DMRS port index group in the plurality of DMRS port index groups to the terminal device through the indication information.

[0348] Referring to Figure 6 , Figure 6 is a third flow diagram of the information indication method provided by the embodiment of the application. The terminal device involved in the method can have more than 4 transmission antennas, such as the terminal device in the application having 6 transmission antennas or 8 transmission antennas. As shown in Figure 6 , the information indication method includes but is not limited to the following steps:

[0349] S301, the network device sends fourth indication information and third indication information, the fourth indication information is used to indicate the DMRS port index, the fourth indication information has at least a second value, the second value indicates a plurality of DMRS port index groups, each DMRS port index group includes at least one DMRS port index, and the third indication information indicates one DMRS port index group in the plurality of DMRS port index groups.

[0350] Correspondingly, the terminal device receives the fourth indication information and the third indication information.

[0351] S302, the terminal device determines a DMRS port index group from the plurality of DMRS port index groups according to the third indication information.

[0352] Optionally, the fourth indication information and the third indication information can be carried in one signaling for sending, or can be carried in different signaling for sending, and the embodiment of the application does not make limitation. Exemplarily, the fourth indication information and the third indication information can be carried in the downlink control information (DCI) signaling. For example, the fourth indication information can be the antenna port field in the DCI signaling, which is used to indicate the DMRS port index; the third indication information can be one or more of the MCS field, the redundancy version field and the new data indication field in the DCI signaling, such as the third indication information being the MCS field and the redundancy version field. The specific MCS field and redundancy version field jointly indicate the code word without being enabled, and the related description is referred to the foregoing embodiment two, which is not described here.

[0353] Optionally, the fourth indication information (e.g., the antenna port field) has at least one value (denoted as a second value for ease of description), and the value (i.e., the second value) indicates a plurality of DMRS port index groups, each of which includes at least one DMRS port index. For example, the plurality of DMRS port index groups includes at least a first DMRS port index group and a second DMRS port index group. The first DMRS port index group and the second DMRS port index group are respectively associated with different numbers of transmission layers. In other words, the number of DMRS port indexes included in the first DMRS port index group is different from the number of DMRS port indexes included in the second DMRS port index group.

[0354] Optionally, the third indication information can indicate the first DMRS port index group in the plurality of DMRS port index groups by indicating that one of the two codewords is enabled. For example, the network device sets the value of the MCS field corresponding to one of the transport blocks in the DCI to 26 and sets the value of the redundancy version field to 1, to indicate that the codeword corresponding to the transport block is not enabled. Similarly, the third indication information can indicate the second DMRS port index group in the plurality of DMRS port index groups by indicating that both of the two codewords are enabled. For example, the value of the MCS field corresponding to any of the transport blocks in the DCI is not 26, or the value of the redundancy version field is not 1, to indicate that the codewords corresponding to the two transport blocks are both enabled. It can be understood that the meaning of the third indication information in the embodiment of the present application is similar to the meaning of the third indication information in the second embodiment described above, except that the third indication information in the second embodiment described above indicates one of the plurality of combinations by indicating that one of the two codewords is enabled, while the third indication information in the embodiment of the present application indicates one of the plurality of DMRS combinations by indicating that one of the two codewords is enabled.

[0355] It can be understood that, in order to support uplink transmission of more than 4 layers, the indication of the DMRS port index needs to be designed. The following illustrates how the fourth indication information (e.g., the antenna port field) indicates the DMRS port index in the embodiment of the present application.

[0356] In an example, rank=5~8 is one-to-one corresponding to rank=1~4. Taking rank=1 corresponding to rank=5, rank=2 corresponding to rank=6, rank=3 corresponding to rank=7, and rank=4 corresponding to rank=8 as an example. Taking double-symbol Type 1 DMRS as an example, according to the correspondence, the DMRS port indexes corresponding to rank=1 and rank=5 are encoded in a table, as shown in Table 21 below; the DMRS port indexes corresponding to rank=2 and rank=6 are encoded in a table, as shown in Table 22 below; the DMRS port indexes corresponding to rank=3 and rank=7 are encoded in a table, as shown in Table 23 below; and the DMRS port indexes corresponding to rank=4 and rank=8 are encoded in a table, as shown in Table 24 below. In the tables 21 to 24, the first column indicates the value of the fourth indication information (such as the antenna port field), and the third column and the sixth column indicate the DMRS port indexes corresponding to different ranks. The meanings of the other columns in the tables 21 to 24 can be referred to the existing standards or protocols, which are not described in detail here. As can be seen from the tables 21 to 24, there is at least one value of the fourth indication information (such as the antenna port field), which indicates a plurality of DMRS port index groups. For example, for rank=1 or rank=5, the value of the antenna port field is 3, and then the indicated two DMRS port index groups are 1 (i.e., the first DMRS port index group) and 0, 1, 2, 3, 4 (i.e., the second DMRS port index group).

[0357] Table 21: DMRS port indexes, dmrs-Type=1, maximum number of DMRS symbols is 2, rank=1 and 5

[0358]

[0359] Table 22: DMRS port indexes, dmrs-Type=1, maximum number of DMRS symbols is 2, rank=2 and 6

[0360]

[0361]

[0362] Table 23: DMRS port indexes, dmrs-Type=1, maximum number of DMRS symbols is 2, rank=3 and 7

[0363]

[0364] Table 24: DMRS port indexes, dmrs-Type=1, maximum number of DMRS symbols is 2, rank=4 and 8

[0365]

[0366]

[0367] In another example, rank=1 corresponds to rank=8, rank=2 corresponds to rank=7, rank=3 corresponds to rank=6, and rank=4 corresponds to rank=5. In the case of double-symbol Type 1 DMRS, according to the correspondence, embodiments of the application encode the DMRS port indexes corresponding to rank=1 and rank=8 in a table, as shown in Table 25 below; encode the DMRS port indexes corresponding to rank=2 and rank=7 in a table, as shown in Table 26 below; encode the DMRS port indexes corresponding to rank=3 and rank=6 in a table, as shown in Table 27 below; and encode the DMRS port indexes corresponding to rank=4 and rank=5 in a table, as shown in Table 28 below. In Tables 25 to 28, the first column indicates the value of the fourth indication information (such as the antenna port field), and the third and sixth columns indicate the DMRS port indexes corresponding to different ranks. As can be seen from Tables 25 to 28, there is at least one value of the fourth indication information (such as the antenna port field), which indicates a plurality of DMRS port index groups. For example, in the case of rank=1 or rank=8, the value of the antenna port field is 1, and the indicated two DMRS port index groups are 1 (i.e., the first DMRS port index group) and 0, 1, 4, 5, 8, 9, 12, 13 (i.e., the second DMRS port index group).

[0368] Table 25: DMRS port indexes, dmrs-Type=1, maximum number of DMRS symbols is 2, rank=1 and 8

[0369]

[0370] Table 26: DMRS port indexes, dmrs-Type=1, maximum number of DMRS symbols is 2, rank=2 and 7

[0371]

[0372]

[0373] Table 27: DMRS port indexes, dmrs-Type=1, maximum number of DMRS symbols is 2, rank=3 and 6

[0374]

[0375] Table 28: DMRS port index, dmrs-Type = 1, maximum number of DMRS symbols is 2, rank = 4 and 5

[0376]

[0377]

[0378] The embodiment of the present application encodes the DMRS port indexes corresponding to the two ranks with the corresponding relationship in a table, so that the fourth indication information (such as the antenna port field) has at least one value indicating a plurality of DMRS port index groups, without increasing the bit overhead of DMRS port index indication, without the need to additionally increase the four DMRS port index tables, without introducing additional indication information overhead, and with the possibility of reducing redundant indication bits.

[0379] It can be understood that although the above two examples (Tables 21 to 28) are both examples of 8-antenna-port maximum 8-layer uplink transmission, the present application can also be applied to other transmission layers greater than 4 layers, such as maximum 6-layer uplink transmission. The implementation mode of the fourth indication information (i.e., the indication mode of the DMRS port index) under 6-antenna-port can refer to the implementation mode under 8-antenna-port, which will not be described here. Under 6-antenna-port, rank = 5-6 and rank = 1-2 can be established in a one-to-one correspondence, rank = 1 corresponds to rank = 5, and rank = 2 corresponds to rank = 6; or, under 6-antenna-port, rank = 5-6 and rank = 3-4 can be established in a one-to-one correspondence, rank = 4 corresponds to rank = 5, and rank = 3 corresponds to rank = 6; how to indicate the DMRS port index under 6-antenna-port can refer to the indication mode under 8-antenna-port, which will not be described here. It can also be understood that the following is described by taking 8-antenna-port as an example for ease of description.

[0380] Optionally, at the receiving end, the terminal device can determine the DMRS port index indicated by the network device in combination with the received fourth indication information and the third indication information. For example, when the terminal device receives the third indication information indicating that one of the two codewords is enabled, the terminal device determines a first DMRS port index group from the plurality of DMRS port index groups. When the terminal device receives the third indication information indicating that both of the two codewords are enabled, the terminal device determines a second DMRS port index group from the plurality of DMRS port index groups.

[0381] For example, rank=1 corresponds to rank=5, rank=2 corresponds to rank=6, rank=3 corresponds to rank=7, and rank=4 corresponds to rank=8. Assuming that rank=8, the corresponding DMRS port index table is Table 24. Assuming that the value of the fourth indication information is 2, the indicated two DMRS port index groups are 2, 3, 6, 7 (i.e., the first DMRS port index group) and 0, 1, 2, 3, 4, 5, 6, 7 (i.e., the second DMRS port index group). If the third indication information indicates that one of the two codewords is enabled, it means that the DMRS port index indicated by the network device is 2, 3, 6, 7 (i.e., the first DMRS port index group). If the third indication information indicates that both of the two codewords are enabled, it means that the DMRS port index indicated by the network device is 0, 1, 2, 3, 4, 5, 6, 7 (i.e., the second DMRS port index group).

[0382] The embodiment of the present application multiplexes the DMRS port index table corresponding to rank=1-4 of the existing 4 antenna ports, and establishes an association between rank=1-4 (referred to as low rank) and rank=5-8 (referred to as high rank), so that the DMRS port index corresponding to one low rank and the DMRS port index corresponding to one high rank are encoded in one table. There is at least one value in the table, indicating a plurality of DMRS port index groups (each DMRS port index group includes at least one DMRS port index), so that no additional DMRS port index table is needed, thus no additional indication information overhead is introduced, and the redundant indication bits can be reduced. In addition, the embodiment of the present application also indicates, through one indication information, which DMRS port index group of the plurality of DMRS port index groups the DMRS port index allocated by the network device to the terminal device is in, so that the terminal device can uniquely determine the DMRS port index allocated by the network device to it. Therefore, the embodiment of the present application can support DMRS port index indication of 8 antenna ports.

[0383] In a possible implementation manner, the information indication method can further include that the network device sends the first indication information, and the first indication information is used to indicate a combination of the number of transmission layers and the TPMI index. One value of the first indication information indicates one combination of the number of transmission layers and the TPMI index. That is, one optional combination of the number of transmission layers and the TPMI index of 8 antenna ports is indicated by one value.

[0384] In another possible implementation manner, the information indication method further includes that the network device sends the first indication information, and the first indication information is used to indicate a combination of the number of transmission layers and the TPMI index. One value of the first indication information indicates one combination of the number of transmission layers and the TPMI index. That is, one optional combination of the number of transmission layers and the TPMI index of 8 antenna ports is indicated by one value.

[0385] S303, the network device sends first indication information, the first indication information is used for indicating a combination of a transmission layer number and a TPMI index corresponding to the transmission layer number, the first indication information has at least a first value, the first value indicates a plurality of combinations of the transmission layer number and the TPMI index, the plurality of combinations includes a first combination and a second combination; the first combination is associated with a first DMRS port index group in the plurality of DMRS port index groups, and the second combination is associated with a second DMRS port index group in the plurality of DMRS port index groups.

[0386] Correspondingly, the terminal device receives the first indication information.

[0387] Optionally, the implementation of step S303 in the embodiment of the present application can refer to the implementation of the same or corresponding part of step S101 in the aforementioned embodiment one, or refer to the implementation of the same or corresponding part of step S201 in the aforementioned embodiment two, which will not be described here.

[0388] Optionally, the third indication information can indicate the first combination in the plurality of combinations by indicating that one of the two codewords is enabled. For example, the network device sets the value of the MCS field corresponding to a certain transport block in the DCI to 26, and sets the value of the redundancy version field to 1, to indicate that the codeword corresponding to the transport block is not enabled. Similarly, the third indication information can indicate the second combination in the plurality of combinations by indicating that both of the two codewords are enabled. For example, the value of the MCS field corresponding to any transport block in the DCI is not 26, or the value of the redundancy version field is not 1, indicating that the codewords corresponding to the two transport blocks are both enabled.

[0389] S304, the terminal device determines a combination from the plurality of combinations according to the third indication information.

[0390] Optionally, the implementation of step S304 in the embodiment of the present application can refer to the implementation of step S202 in the aforementioned embodiment two, which will not be described here.

[0391] The embodiment of the present application associates rank=1~4 (referred to as low rank) and rank=5~8 (referred to as high rank), encodes one low rank and its corresponding TPMI index and one high rank and its corresponding TPMI index in one table, and the TPMI index corresponding to the low rank is unchanged, which can not only support the combined indication of the number of transmission layers (from 1 layer to 8 layers) and the TPMI index of 8 antenna ports, but also reduce the indication overhead without affecting compatibility. In addition, because there is at least one value in the optional combination table of the rank and the TPMI index of 8 antenna ports designed by the embodiment of the present application indicating multiple combinations, the embodiment of the present application also indicates which combination in the multiple combinations the network device allocates to the terminal device through an indication information, so that the terminal device can uniquely determine the number of transmission layers and the TPMI index allocated by the network device.

[0392] Embodiment four

[0393] The embodiment four of the present application mainly introduces how to support the SRS resource index indication of more than 4 SRS resources, thereby supporting the non-codebook transmission of more than 4 layers.

[0394] Referring to Figure 7 , Figure 7 is a fourth flowchart of the information indication method provided by the embodiment of the present application. The terminal device involved in the method can have more than 4 transmission antennas, for example, the terminal device in the present application has 6 transmission antennas or 8 transmission antennas. As shown in Figure 7 , the information indication method includes but is not limited to the following steps:

[0395] S401, the network device sends fifth indication information and second indication information, the fifth indication information is used to indicate the SRS resource index, the fifth indication information has at least a first value, the first value indicates a plurality of SRS resource index groups, each SRS resource index group includes at least one SRS resource index; the second indication information is used to indicate the DMRS port index; the value of the second indication information belongs to one of a plurality of sets, the plurality of sets at least includes a first set and a second set, when the second indication information is a value in the first set, the DMRS port index is associated with a first number of transmission layers, when the second indication information is a value in the second set, the DMRS port index is associated with a second number of transmission layers.

[0396] Correspondingly, the terminal device receives the fifth indication information and the second indication information.

[0397] S402, the terminal device determines an SRS resource index group from the plurality of SRS resource index groups according to the value of the second indication information.

[0398] Optionally, the fifth indication information and the second indication information can be carried in one signaling or in different signaling, and the embodiments of the present application do not make any limitation. For example, the fifth indication information and the second indication information can be carried in DCI signaling. For example, the fifth indication information can be an SRS resource indication (SRI) field in the DCI signaling, used for indicating an SRS resource index; and the second indication information can be an antenna port field in the DCI signaling, used for indicating a DMRS port index.

[0399] Optionally, the implementation of the second indication information (such as the antenna port field) can refer to the related description in the foregoing embodiment one, and details are not described herein. In the embodiments of the present application, the DMRS port index table corresponding to different ranks (such as rank = 1-8) is shown in the foregoing table 12a to table 15b or the foregoing table 17 to table 20, and details are not described herein.

[0400] Optionally, the fifth indication information (such as the SRI field) has at least one value (referred to as a first value for convenience of description), and the value (i.e., the first value) indicates a plurality of SRS resource index groups, each of which includes at least one SRS resource index. It can be understood that the first value in the embodiments of the present application is independent of the first value in the foregoing embodiment one, and is not necessarily the same or not necessarily different; it is only a representation for convenience of description. The plurality of SRS resource index groups includes a first SRS resource index group and a second SRS resource index group. The first SRS resource index group contains a number of SRS resource indexes equal to the first transmission layer number, or in other words, the first SRS resource index group is associated with the first transmission layer number. The second SRS resource index group contains a number of SRS resource indexes equal to the second transmission layer number, or in other words, the second SRS resource index group is associated with the second transmission layer number. Wherein, the first transmission layer number is one of 1, 2, 3, and 4, and the second transmission layer number is one of 5, 6, 7, and 8. For example, taking 8 antenna ports as an example, when the first transmission layer number is 1, the second transmission layer number is 5; when the first transmission layer number is 2, the second transmission layer number is 6; when the first transmission layer number is 3, the second transmission layer number is 7; and when the first transmission layer number is 4, the second transmission layer number is 8. Alternatively, when the first transmission layer number is 1, the second transmission layer number is 8; when the first transmission layer number is 2, the second transmission layer number is 7; when the first transmission layer number is 3, the second transmission layer number is 6; and when the first transmission layer number is 4, the second transmission layer number is 5. Of course, the first transmission layer number and the second transmission layer number can also have other corresponding relationships, which are not limited to the foregoing examples, and the embodiments of the present application do not limit the corresponding relationship between the transmission layer numbers.

[0401] It can be understood that in order to support non-codebook transmission of maximum 8 layers, the indication of SRS resource index needs to be designed. The following illustrates how the fifth indication information (such as SRI field) indicates SRS resource index in the embodiments of the present application.

[0402] For example, rank=1 corresponds to rank=8, rank=2 corresponds to rank=7, rank=3 corresponds to rank=6, and rank=4 corresponds to rank=5. It can be understood that the first SRS resource index group is associated with the first number of transmission layers, the second SRS resource index group is associated with the second number of transmission layers, and the embodiments of the present application associate rank=1-4 with rank=5-8, so there is also an association between the plurality of SRS resource index groups indicated by the first value. The embodiments of the present application jointly indicate (such as using one value to indicate the plurality of SRS resource index groups having an association) the plurality of SRS resource index groups having an association based on the corresponding relationship between ranks, and specific examples are shown in the following table 29. The meanings of each parameter and each column in table 29 are referred to the related description of table 10, which will not be described here. As shown in table 29, there is at least one value of the fifth indication information (such as SRI field), which indicates a plurality of SRS resource index groups. For example, N SRS =8, and the value of SRI field is 0, then the two SRS resource index groups indicated are: 0, 1, 2, 3, 4, 5, 6, 7 (i.e. the second SRS resource index group) and 0 (i.e. the first SRS resource index group).

[0403] It should be understood that when N SRS =8, the SRS resource index group corresponding to rank=1 is a combination of selecting 1 SRS resource index from 8 SRS resource indexes, i.e. the SRS resource index group corresponding to rank=1 has C8 1 =8. Similarly, when N SRS =8, the SRS resource index group corresponding to rank=2 is a combination of selecting 2 SRS resource indexes from 8 SRS resource indexes, i.e. the SRS resource index group corresponding to rank=2 has C8 2 =(8*7) / (2*1)=28. When N SRS =8, the SRS resource index group corresponding to rank=3 is a combination of selecting 3 SRS resource indexes from 8 SRS resource indexes, i.e. the SRS resource index group corresponding to rank=3 has C8 3 =(8*7*6) / (3*2*1)=56. When N SRS =8, the SRS resource index group corresponding to rank=4 is a combination of selecting 4 SRS resource indexes from 8 SRS resource indexes, i.e. the SRS resource index group corresponding to rank=4 has C8 4 =(8*7*6*5) / (4*3*2*1)=70. Similarly, when NSRS When rank = 8, the SRS resource index group corresponding to rank = 5 has a total of C8. 5 There are 8 SRS resource index groups corresponding to rank=6. 6 There are 8 SRS resource index groups corresponding to rank=7. 7 There are 8 SRS resource index groups corresponding to rank=8, with a total of C8. 8 Therefore, when N SRS When the value is 8, the higher the rank value, the more SRS resource index groups it corresponds to. For the sake of brevity, Table 29 below only shows a portion of the SRI field values ​​and the SRS resource index groups indicated by these values. In practical applications, Table 29 below may include N... SRS When rank = 8, all SRS resource index groups corresponding to rank = 1 to 8.

[0404] Table 29: Example 2 of SRI field

[0405]

[0406]

[0407]

[0408]

[0409]

[0410] Because N SRS When rank = 8, the total number of SRS resource index groups corresponding to rank = 1 to 8 (equal to C8) 1 +C8 2 +C8 3 +C8 4 +C8 5 +C8 6 +C8 7 +C8 8 Since there are many SRS resource index groups, this application embodiment establishes a correspondence between rank=1~4 and rank=5~8. Based on this correspondence, the fifth indication information (such as the SRI field) has at least one value, which indicates multiple SRS resource index groups. Compared with the method of one value indicating one SRS resource index group, the indication overhead is reduced.

[0411] It can be understood that although the above example (Table 29) is an example of 8 antenna ports, maximum support of 8 layers of uplink transmission, but the present application can also be applicable to other transmission layer numbers greater than 4 layers of uplink transmission, such as maximum 6 layers of uplink transmission. The implementation mode of the fifth indication information under 6 antenna ports (that is, the indication mode of the SRS resource index) can refer to the implementation mode under 8 antenna ports, which will not be described one by one here. Under 6 antenna ports, rank = 5 ~ 6 and rank = 3 ~ 4 can be established a one-to-one correspondence relationship, rank = 4 and rank = 5 are corresponding, rank = 3 and rank = 6 are corresponding; How to indicate the SRS resource index under 6 antenna ports can refer to the indication mode under 8 antenna ports, which will not be described in detail here. It can also be understood that the following is described by taking 8 antenna ports as an example for convenience.

[0412] In some scenarios, in order to further reduce the indication overhead, the embodiments of the present application can also select part of the SRS resource index groups corresponding to each rank to indicate. That is, the above table 29 can only include N SRS = 8, part of all SRS resource index groups corresponding to rank = 1 ~ 8.

[0413] Optionally, at the receiving end, the terminal device can jointly receive the above-mentioned fifth indication information (such as SRI field) and the above-mentioned second indication information (such as antenna port field) to determine the SRS resource index and DMRS port index indicated by the network device. Specifically, after the terminal device receives the above-mentioned fifth indication information (such as SRI field) and the above-mentioned second indication information (such as antenna port field), it can determine which DMRS port index is indicated by the second indication information according to the number of SRS resource indexes contained in the above-mentioned multiple SRS resource index groups and the value of the above-mentioned second indication information, and then determine an SRS resource index group from the above-mentioned multiple SRS resource index groups according to the number of DMRS port indexes indicated by the second indication information. For example, if the number of DMRS port indexes indicated by the second indication information is the same as the number of SRS resource indexes contained in the first SRS resource index group in the above-mentioned multiple SRS resource index groups; then the terminal device determines the first SRS resource index group, and the SRS resource indexes contained in the first SRS resource index group are the SRS resource indexes configured by the network device for the terminal device. If the number of DMRS port indexes indicated by the second indication information is the same as the number of SRS resource indexes contained in the second SRS resource index group in the above-mentioned multiple SRS resource index groups; then the terminal device determines the second SRS resource index group, and the SRS resource indexes contained in the second SRS resource index group are the SRS resource indexes configured by the network device for the terminal device.

[0414] For example, taking the above table 29 as an example, assuming that NSRS = 8, and the value of the fifth indication information is 0, the indicated SRS resource index groups are 0, 1, 2, 3, 4, 5, 6, 7 (i.e., the second SRS resource index group) and 0 (i.e., the first SRS resource index group) respectively. Based on the number of SRS resource indexes contained in the first SRS resource index group and the second SRS resource index group, the terminal device can determine that the rank indicated by the network device is 1 or 5. Taking a double-symbol Type 1 DMRS as an example, the corresponding DMRS port index table is the aforementioned table 12a. If the value of the second indication information is one of 0 to 13, for example, 0, it indicates that the network device indicates rank = 1, and the corresponding SRS resource index is 0, that is, the first SRS resource index group can be determined. If the value of the second indication information is 14, it indicates that the network device indicates rank = 5, and the corresponding SRS resource index is 0, 1, 2, 3, 4, 5, 6, 7, that is, the second SRS resource index group can be determined.

[0415] The embodiments of the present application associate low rank (such as rank = 1 ~ 4) with high rank (such as rank = 5 ~ 8), so that the SRS resource index group corresponding to one low rank is also associated with the SRS resource index group corresponding to one high rank, and multiple SRS resource index groups having an association relationship are jointly indicated, such as using one value to indicate multiple SRS resource index groups having an association relationship. The SRS resource index indication of more than 4 SRS resources can be supported, thereby supporting non-codebook transmission of more than 4 layers, and further improving transmission performance. In addition, the embodiments of the present application also multiplex the DMRS port index table corresponding to rank = 1 ~ 4 of the existing 4 antenna ports, and use the redundant bits (or reserved values) in the DMRS port index table corresponding to rank = 1 ~ 4 of the 4 antenna ports to indicate the DMRS port index corresponding to rank = 5 ~ 8 based on the established rank correspondence, so that the DMRS port index table does not need to be additionally increased, and therefore the additional indication information overhead is not introduced, and the redundant indication bits can be reduced.

[0416] Embodiment five

[0417] The embodiments of the present application mainly introduce another way to support the SRS resource index indication of more than 4 SRS resources, thereby supporting non-codebook transmission of more than 4 layers.

[0418] Referring to Figure 8 , Figure 8 is the fifth flowchart of the information indication method provided by the embodiments of the present application. The terminal device involved in the method can have more than 4 transmission antennas, such as the terminal device in the present application having 6 transmission antennas or 8 transmission antennas. As shown in Figure 8 , the information indication method includes but is not limited to the following steps:

[0419] S501, the network device sends fifth indication information and third indication information, the fifth indication information is used for indicating SRS resource indexes, the fifth indication information has at least a first value, the first value indicates a plurality of SRS resource index groups, each SRS resource index group includes at least one SRS resource index; the third indication information indicates one SRS resource index group in the plurality of SRS resource index groups.

[0420] Correspondingly, the terminal device receives the fifth indication information and the third indication information.

[0421] S502, the terminal device determines one SRS resource index group from the plurality of SRS resource index groups according to the third indication information.

[0422] Optionally, the fifth indication information and the third indication information can be carried in one signaling for sending, or can be carried in different signaling for sending, and the embodiments of the application do not limit this. For example, the fifth indication information and the third indication information can be carried in downlink control information (DCI) signaling. For example, the fifth indication information can be an SRS resource indication (SRI) field in the DCI signaling, used for indicating SRS resource indexes; the third indication information can be one or more of an MCS field, a redundancy version field and a new data indicator field in the DCI signaling, such as the third indication information being the MCS field and the redundancy version field. For the specific MCS field and redundancy version field jointly indicating a code word disabled manner, reference is made to the related description of the foregoing embodiment two, which is not repeated here.

[0423] Wherein, the implementation of the fifth indication information (such as the SRI field) can refer to the related description in the foregoing embodiment four, which is not repeated here. The value of the SRI field and the SRS resource index indicated thereby in the embodiments of the application is shown in the foregoing table 29, which is not repeated here. The implementation of the third indication information can refer to the related description in the foregoing embodiment two, which is not repeated here.

[0424] Optionally, the first value indicates a plurality of SRS resource index groups, including a first SRS resource index group and a second SRS resource index group. The first SRS resource index group contains SRS resource indexes equal to the first number of transmission layers, or the first SRS resource index group is associated with the first number of transmission layers. The second SRS resource index group contains SRS resource indexes equal to the second number of transmission layers, or the second SRS resource index group is associated with the second number of transmission layers. The third indication information can indicate the first SRS resource index group in the plurality of SRS resource index groups by indicating that one of the two codewords is enabled. For example, the network device sets the value of the MCS field of one of the transport blocks in the DCI to 26, and sets the value of the redundancy version field to 1, to indicate that the codeword corresponding to the transport block is not enabled. Similarly, the third indication information can indicate the second SRS resource index group in the plurality of SRS resource index groups by indicating that both of the two codewords are enabled. For example, the value of the MCS field of any of the transport blocks in the DCI is not 26, or the value of the redundancy version field is not 1, to indicate that the codewords corresponding to the two transport blocks are both enabled.

[0425] Optionally, at the receiving end, the terminal device can jointly determine the SRS resource index indicated by the network device based on the received fifth indication information and third indication information. For example, when the terminal device receives the third indication information indicating that one of the two codewords is enabled, the terminal device determines the first SRS resource index group from the plurality of SRS resource index groups, and the SRS resource indexes contained in the first SRS resource index group are the SRS resource indexes configured by the network device for the terminal device. When the terminal device receives the third indication information indicating that both of the two codewords are enabled, the terminal device determines the second SRS resource index group from the plurality of SRS resource index groups, and the SRS resource indexes contained in the second SRS resource index group are the SRS resource indexes configured by the network device for the terminal device.

[0426] For example, taking the foregoing Table 29 as an example, assuming that N SRS = 8, the value of the fifth indication information is 8, and the indicated SRS resource index groups are 0, 1, 2, 3, 4, 5, and 6 (i.e., the second SRS resource index group) and 0 and 1 (i.e., the first SRS resource index group). If the third indication information indicates that one of the two codewords is enabled, the terminal device determines that the SRS resource indexes indicated by the network device are 0 and 1 (i.e., the first SRS resource index group). If the third indication information indicates that both of the two codewords are enabled, the terminal device determines that the SRS resource indexes indicated by the network device are 0, 1, 2, 3, 4, 5, and 6 (i.e., the second SRS resource index group).

[0427] In a possible implementation, the information indication method further includes:

[0428] S503, the network device sends second indication information, the second indication information is used for indicating the DMRS port index; the value of the second indication information belongs to one of a plurality of sets, the plurality of sets at least include the first set and the second set, when the second indication information is the value in the first set, the DMRS port index is associated with the first transmission layer number, when the second indication information is the value in the second set, the DMRS port index is associated with the second transmission layer number.

[0429] Correspondingly, the terminal device receives the second indication information and determines the DMRS port index.

[0430] Optionally, the implementation of step S504 in the embodiment of the application can refer to the implementation of the same or corresponding part of step S401 in the aforementioned embodiment four, which will not be described here.

[0431] In another possible implementation, the above information indication method further includes: the network device sends fourth indication information, the fourth indication information is used for indicating the DMRS port index, the fourth indication information has at least a second value, the second value indicates a plurality of DMRS port index groups, each DMRS port index group includes at least one DMRS port index. Correspondingly, the terminal device receives the fourth indication information. The terminal device determines a DMRS port index group from the plurality of DMRS port index groups according to the third indication information.

[0432] The embodiment of the application associates rank=1~4 (referred to as low rank) with rank=5~8 (referred to as high rank), so that one SRS resource index group corresponding to a low rank is also associated with one SRS resource index group corresponding to a high rank, and a plurality of SRS resource index groups having an association relationship are jointly indicated, such as using one value to indicate a plurality of SRS resource index groups having an association relationship; the embodiment of the application also indicates, through one indication information, which SRS resource index group the SRS resource index allocated by the network device to the terminal device is in the plurality of SRS resource index groups, so that the terminal device can uniquely determine the SRS resource index allocated by the network device to it; the SRS resource index indication of a maximum of 8 SRS resources can be supported, thereby supporting a maximum of 8 layers of non-codebook transmission, and further improving transmission performance.

[0433] With the evolution of antenna technology and signal processing technology, future needs to support more than 4 transmit antennas for uplink transmission. In one optional embodiment, for the above codebook based uplink transmission, the present embodiment also provides a set of precoding matrices (codebook) corresponding to 8 transmit antennas. For example, the set of precoding matrices (codebook) corresponding to 8 antennas can be as shown in the following Table 30 to Table 37. It can be understood that the determination of TPMI index determines a unique precoding matrix. It should be understood that Table 30 to Table 37 are only examples, and the present embodiment does not limit the specific content of the precoding matrix.

[0434] Table 30: Set of precoding matrices corresponding to 8 antenna ports, single layer (i.e. rank = 1) transmission

[0435]

[0436]

[0437] The precoding matrices identified by TPMI indexes 56 to 63 in the above Table 30 are as follows:

[0438]

[0439]

[0440] The precoding matrices identified by TPMI indexes 64 to 71 in the above Table 30 are as follows:

[0441]

[0442]

[0443] Table 31: Set of precoding matrices corresponding to 8 antenna ports, 2 layers (i.e. rank = 2) transmission

[0444]

[0445]

[0446]

[0447] The precoding matrices identified by TPMI indexes 70 to 75 in the above Table 31 are as follows:

[0448]

[0449]

[0450] Table 32: Set of precoding matrices corresponding to 8 antenna ports, 3 layers (i.e. rank = 3) transmission

[0451]

[0452]

[0453] The precoding matrices identified by TPMI indices 48 to 55 in Table 32 above are as follows:

[0454]

[0455]

[0456]

[0457]

[0458] Table 33: Precoding matrix set for 8 antenna ports, 4 layers (i.e., rank = 4) transmission

[0459]

[0460]

[0461]

[0462] The precoding matrices identified by TPMI indices 29, 31, 33, 35, 37, 39, 41, and 43 in Table 33 above are as follows:

[0463]

[0464]

[0465]

[0466]

[0467]

[0468]

[0469]

[0470]

[0471] Table 34: Precoding matrix set for 8 antenna ports, 5 layers (i.e., rank = 5) transmission

[0472]

[0473] Table 35: Precoding matrix set for 8 antenna ports, 6 layers (i.e., rank = 6) transmission

[0474]

[0475] Table 36: Precoding matrix set corresponding to 8 antenna port, 7 layer (i.e., rank = 7) transmission

[0476]

[0477]

[0478] The precoding matrices identified by TPMI indices 4 to 6 in the above Table 36 are as follows:

[0479]

[0480]

[0481] Table 37: Precoding matrix set corresponding to 8 antenna port, 8 layer (i.e., rank = 8) transmission

[0482]

[0483] The precoding matrices identified by TPMI indices 3 and 4 in the above Table 37 are as follows:

[0484]

[0485] It can be understood that the antenna architecture and capability of different terminal devices are different due to the volume and cost of the terminal devices. For the transmit antenna capability of different terminal devices, the precoding matrices that can be used are different. In other words, for different antenna capabilities, the value range of TPMI index is different. For example, 1) when the antenna capability of the terminal device (or UE) is that all transmit antennas do not support coherent transmission (Non Coherent), the terminal device can use the precoding matrices identified by TPMI index = 0-7 in Table 30, TPMI index = 0-27 in Table 31, TPMI index = 0-15 in Table 32, TPMI index = 0-11 in Table 33, TPMI index = 0-3 in Table 34, TPMI index = 0-1 in Table 35, TPMI index = 0 in Table 36, and TPMI index = 0 in Table 37. 2) When the antenna capability of the terminal device (or UE) is that all transmit antennas support partial coherent transmission (Partial Coherent), the terminal device can use the precoding matrices identified by TPMI index = 8-39 in Table 30, TPMI index = 28-59 in Table 31, TPMI index = 16-39 in Table 32, TPMI index = 12-27 in Table 33, TPMI index = 4-11 in Table 34, TPMI index = 2-5 in Table 35, TPMI index = 1-2 in Table 36, and TPMI index = 1-2 in Table 37. 3) When the antenna capability of the terminal device (or UE) is that all transmit antennas support coherent transmission (Full Coherent), the terminal device can use the precoding matrices identified by TPMI index = 40-71 in Table 30, TPMI index = 60-75 in Table 31, TPMI index = 40-55 in Table 32, TPMI index = 28-43 in Table 33, TPMI index = 12-19 in Table 34, TPMI index = 6-13 in Table 35, TPMI index = 3-6 in Table 36, and TPMI index = 3-4 in Table 37. It can be understood that when the antenna capability of the terminal device (or UE) is that all transmit antennas support coherent transmission (Full Coherent), since the antenna capability of the terminal device is strong, the terminal device can use any precoding matrix in the above Tables 30 to 37.

[0486] The above describes the method provided by the application in detail. In order to facilitate the implementation of the above scheme of the embodiments of the application, the embodiments of the application further provide a corresponding device or equipment.

[0487] The network device and the terminal device in the embodiments of the present application are divided into functional modules according to the above method embodiments. 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 realized in the form of hardware or in the form of a software functional module. It should be noted that the division of the modules in the present application is illustrative, and is only a logical functional division. In actual implementation, another division mode can be used. The following will be described in detail in combination with Figures 9 to 11 The network device and the terminal device in the embodiments of the present application are divided into functional modules according to the above method embodiments. 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 realized in the form of hardware or in the form of a software functional module. It should be noted that the division of the modules in the present application is illustrative, and is only a logical functional division. In actual implementation, another division mode can be used. The following will be described in detail in combination with

[0488] The network device and the terminal device in the embodiments of the present application are divided into functional modules according to the above method embodiments. 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 realized in the form of hardware or in the form of a software functional module. It should be noted that the division of the modules in the present application is illustrative, and is only a logical functional division. In actual implementation, another division mode can be used. The following will be described in detail in combination with Figure 9 Figure 9 The network device and the terminal device in the embodiments of the present application are divided into functional modules according to the above method embodiments. 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 realized in the form of hardware or in the form of a software functional module. It should be noted that the division of the modules in the present application is illustrative, and is only a logical functional division. In actual implementation, another division mode can be used. The following will be described in detail in combination with Figure 9

[0489] In some embodiments of the present application, the communication apparatus can be the network device shown above. That is Figure 9 The communication apparatus shown in FIG. 1 can be used to perform the steps or functions performed by the network device in the above method embodiments. For example, the communication apparatus can be a network device or a chip, and the embodiments of the present application do not limit this.

[0490] In one design, the transceiver 10 is configured to transmit the first indication information and the second indication information.

[0491] For example, the processing unit 20 is configured to generate the first indication information and the second indication information, and transmit the first indication information and the second indication information by or control the transceiver 10 to transmit the first indication information and the second indication information.

[0492] It can be understood that the specific description of the first indication information and the second indication information can refer to the method embodiments shown above, and will not be repeated here.

[0493] It can be understood that the specific description of the transceiver and the processing unit shown in the embodiments of the present application is only an example. For the specific functions or steps performed by the transceiver and the processing unit, it can refer to the above method embodiments (such as Figure 4 ), and will not be described here.

[0494] In another design, the transceiver 10 is configured to transmit the first indication information and the third indication information.

[0495] For example, the processing unit 20 is configured to generate the first indication information and the third indication information, and transmit the first indication information and the third indication information by or control the transceiver 10 to transmit the first indication information and the third indication information.

[0496] In a possible implementation, the transceiver 10 is further configured to transmit the second indication information.​​

[0497] The processing unit 20 is configured to generate the second indication information and send the second indication information through or control the transceiver unit 10 to send the second indication information.

[0498] It can be understood that the specific description of the first indication information, the second indication information, and the third indication information can refer to the method embodiments shown above, and will not be repeated here.

[0499] It can be understood that the specific description of the transceiver unit and the processing unit shown in the embodiments of the present application is only an example, and the specific functions or steps of the transceiver unit and the processing unit can refer to the above method embodiments (such as Figure 5 ), and will not be described here.

[0500] In another design, the transceiver unit 10 is configured to send the fourth indication information and the third indication information.

[0501] The processing unit 20 is configured to generate the fourth indication information and the third indication information, and send the fourth indication information and the third indication information through or control the transceiver unit 10 to send the fourth indication information and the third indication information.

[0502] In a possible implementation, the transceiver unit 10 is further configured to send the first indication information.

[0503] The processing unit 20 is configured to generate the first indication information and send the first indication information through or control the transceiver unit 10 to send the first indication information.

[0504] It can be understood that the specific description of the first indication information, the third indication information, and the fourth indication information can refer to the method embodiments shown above, and will not be repeated here.

[0505] It can be understood that the specific description of the transceiver unit and the processing unit shown in the embodiments of the present application is only an example, and the specific functions or steps of the transceiver unit and the processing unit can refer to the above method embodiments (such as Figure 6 ), and will not be described here.

[0506] In another design, the transceiver unit 10 is configured to send the fifth indication information and the second indication information.

[0507] The processing unit 20 is configured to generate the fifth indication information and the second indication information, and send the fifth indication information and the second indication information through or control the transceiver unit 10 to send the fifth indication information and the second indication information.

[0508] It can be understood that the specific description of the fifth indication information and the second indication information can refer to the method embodiments shown above, and will not be repeated here.

[0509] It is to be understood that the specific description of the transceiver unit and the processing unit shown in the embodiments of the present application is only an example. For the specific functions or steps of the transceiver unit and the processing unit, please refer to the above method embodiments (such as Figure 7 ), which will not be described in detail here.

[0510] In yet another design, the transceiver unit 10 is configured to transmit the fifth indication information and the third indication information.

[0511] For example, the processing unit 20 is configured to generate the fifth indication information and the third indication information, and transmit the fifth indication information and the third indication information through or by controlling the transceiver unit 10.

[0512] In a possible implementation, the transceiver unit 10 is further configured to transmit the second indication information.

[0513] For example, the processing unit 20 is configured to generate the second indication information, and transmit the second indication information through or by controlling the transceiver unit 10.

[0514] It is to be understood that the specific description of the fifth indication information, the third indication information, and the second indication information can be referred to the above method embodiments, which will not be described one by one here.

[0515] It is to be understood that the specific description of the transceiver unit and the processing unit shown in the embodiments of the present application is only an example. For the specific functions or steps of the transceiver unit and the processing unit, please refer to the above method embodiments (such as Figure 8 ), which will not be described in detail here.

[0516] Multiplexing Figure 9 In some other embodiments of the present application, the communication device can be the terminal device shown above. That is Figure 9 The communication device shown above can be configured to perform the steps or functions performed by the terminal device in the above method embodiments. For example, the communication device can be a terminal device or a chip, and the embodiments of the present application are not limited thereto.

[0517] In one design, the transceiver unit 10 is configured to receive the first indication information and the second indication information; and the processing unit 20 is configured to determine one combination from a plurality of combinations according to the value of the second indication information.

[0518] It is to be understood that the specific description of the first indication information and the second indication information can be referred to the above method embodiments, which will not be described one by one here.

[0519] It is to be understood that the specific description of the transceiver unit and the processing unit shown in the embodiments of the present application is only an example. For the specific functions or steps of the transceiver unit and the processing unit, please refer to the above method embodiments (such as Figure 4The specific description of the first indication information, the second indication information, and the third indication information can refer to the method embodiments shown in the foregoing method embodiments, and will not be repeated here.

[0520] In another design, the transceiver 10 is configured to receive the first indication information and the third indication information; and the processor 20 is configured to determine one combination from the multiple combinations according to the third indication information.

[0521] In a possible implementation, the multiple combinations include a first combination and a second combination. The processor 20 is specifically configured to: when the third indication information indicates that one of the two code words is enabled, determine the first combination from the multiple combinations; and when the third indication information indicates that both of the two code words are enabled, determine the second combination from the multiple combinations.

[0522] In a possible implementation, the transceiver 10 is further configured to receive the second indication information.

[0523] It can be understood that the specific description of the first indication information, the second indication information, and the third indication information can refer to the method embodiments shown in the foregoing method embodiments, and will not be repeated here.

[0524] It can be understood that the specific description of the transceiver and the processor shown in the embodiments of the present application is only an example. For the specific functions or steps of the transceiver and the processor, the method embodiments (such as the method embodiments shown in the foregoing method embodiments) can be referred to, and will not be repeated here. Figure 5

[0525] In another design, the transceiver 10 is configured to receive the fourth indication information and the third indication information; and the processor 20 is configured to determine one DMRS port index group from the multiple DMRS port index groups according to the third indication information.

[0526] In a possible implementation, the multiple DMRS port index groups include a first DMRS port index group and a second DMRS port index group. The processor 20 is specifically configured to: when the third indication information indicates that one of the two code words is enabled, determine the first DMRS port index group from the multiple DMRS port index groups; and when the third indication information indicates that both of the two code words are enabled, determine the second DMRS port index group from the multiple DMRS port index groups.

[0527] In a possible implementation, the transceiver 10 is further configured to receive the first indication information; and the processor 20 is configured to determine one combination from the multiple combinations according to the third indication information.

[0528] In a possible implementation, the processor 20 is further specifically configured to: when the third indication information indicates that one of the two code words is enabled, determine the first combination from the multiple combinations; and when the third indication information indicates that both of the two code words are enabled, determine the second combination from the multiple combinations. ​

[0529] It can be understood that the specific description of the first indication information, the third indication information, and the fourth indication information can refer to the method embodiments shown above, and will not be repeated here.

[0530] It can be understood that the specific description of the transceiver unit and the processing unit shown in the embodiments of the present application is only an example, and the specific functions or executed steps of the transceiver unit and the processing unit can refer to the above method embodiments (such as Figure 6 ), and will not be described here.

[0531] In another design, the transceiver unit 10 is configured to receive the fifth indication information and the second indication information; and the processing unit 20 is configured to determine one SRS resource index group from the plurality of SRS resource index groups according to the value of the second indication information.

[0532] It can be understood that the specific description of the fifth indication information and the second indication information can refer to the method embodiments shown above, and will not be repeated here.

[0533] It can be understood that the specific description of the transceiver unit and the processing unit shown in the embodiments of the present application is only an example, and the specific functions or executed steps of the transceiver unit and the processing unit can refer to the above method embodiments (such as Figure 7 ), and will not be described here.

[0534] In another design, the transceiver unit 10 is configured to receive the fifth indication information and the third indication information; and the processing unit 20 is configured to determine one SRS resource index group from the plurality of SRS resource index groups according to the third indication information.

[0535] In a possible implementation, the plurality of SRS resource index groups includes a first SRS resource index group and a second SRS resource index group. The processing unit 20 is specifically configured to: when the third indication information indicates that one of the two code words is enabled, determine the first SRS resource index group from the plurality of SRS resource index groups; and when the third indication information indicates that both of the two code words are enabled, determine the second SRS resource index group from the plurality of SRS resource index groups.

[0536] In a possible implementation, the transceiver unit 10 is further configured to receive the second indication information.

[0537] It can be understood that the specific description of the fifth indication information, the third indication information, and the second indication information can refer to the method embodiments shown above, and will not be repeated here.

[0538] It can be understood that the specific description of the transceiver unit and the processing unit shown in the embodiments of the present application is only an example, and the specific functions or executed steps of the transceiver unit and the processing unit can refer to the above method embodiments (such asFigure 8 ), which are not described again here.

[0539] The network device and the terminal device of the embodiments of the present application are introduced above, and possible product forms of the network device and the terminal device are introduced below. It should be understood that any product form having the functions of the network device described above or any product form having the functions of the terminal device described above falls within the protection scope of the embodiments of the present application. It should also be understood that the following introduction is only an example, and the product form of the network device and the terminal device of the embodiments of the present application is not limited to this. Figure 9 Figure 9 It should be understood that the following introduction is only an example, and the product form of the network device and the terminal device of the embodiments of the present application is not limited to this.

[0540] In a possible implementation manner, the communication apparatus shown in FIG. 10 can be the network device or the terminal device, or a chip in the network device or the terminal device. Figure 9 In the communication apparatus shown in FIG. 10, the processing unit 20 can be one or more processors, and the transceiver unit 10 can be a transceiver, or the transceiver unit 10 can also be a sending unit and a receiving unit, the sending unit can be a transmitter, and the receiving unit can be a receiver, and the sending unit and the receiving unit are integrated in one device, for example, a transceiver. In the embodiments of the present application, the processor and the transceiver can be coupled, and the connection manner of the processor and the transceiver is not limited in the embodiments of the present application. In the process of executing the above method, the process of sending information (such as sending the first indication information, the second indication information, the third indication information, the fourth indication information, the fifth indication information, etc.) in the above method can be understood as the process of outputting the above information by the processor. When the above information is output, the processor outputs the above information to the transceiver, so that the transceiver transmits. After the above information is output by the processor, it can also need to be processed further, and then reach the transceiver. Similarly, the process of receiving information (such as receiving the first indication information, the second indication information, the third indication information, the fourth indication information, the fifth indication information, etc.) in the above method can be understood as the process of receiving the input above information by the processor. When the processor receives the input information, the transceiver receives the above information and inputs it to the processor. Further, after the transceiver receives the above information, the above information can need to be processed further, and then input to the processor.

[0541] Referring to Figure 10 , Figure 10 FIG. 10 is a structural schematic diagram of a communication apparatus 1000 provided by the embodiments of the present application. The communication apparatus 1000 can be a network device or a terminal device, or a chip therein. Figure 10 Only the main components of the communication apparatus 1000 are shown. In addition to the processor 1001 and the transceiver 1002, the communication apparatus can further include a memory 1003 and an input and output device (not shown in the figure).

[0542] ​The processor 1001 is mainly used for processing communication protocol and communication data, and controlling the whole communication device, executing software program, and processing data of the software program. The memory 1003 is mainly used for storing software program and data. The transceiver 1002 can include control circuit and antenna, and the control circuit is mainly used for converting baseband signal and radio frequency signal, and processing radio frequency signal. The antenna is mainly used for receiving and transmitting radio frequency signal in the form of electromagnetic wave. Input and output device, such as touch screen, display screen, keyboard, etc. is mainly used for receiving user input data and outputting data to user.

[0543] When the communication device is powered on, the processor 1001 can read the software program in the memory 1003, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be transmitted wirelessly, the processor 1001 performs baseband processing on the data to be transmitted, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit converts the baseband signal into a radio frequency signal, and transmits the radio frequency signal in the form of electromagnetic wave through the antenna. When data is transmitted to the communication device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1001. The processor 1001 converts the baseband signal into data and processes the data.

[0544] In another implementation, the radio frequency circuit and the antenna can be arranged independently of the processor for baseband processing, such as in a distributed scenario, the radio frequency circuit and the antenna can be arranged remotely from the communication device.

[0545] The processor 1001, the transceiver 1002, and the memory 1003 can be connected through a communication bus.

[0546] In one design, the communication device 1000 can be configured to perform the functions of the network device in the foregoing embodiment one: the processor 1001 can be configured to generate Figure 4 the first indication information and the second indication information transmitted in step S101, and / or perform other processes described herein; the transceiver 1002 can be configured to perform Figure 4 step S101 in the foregoing embodiment one, and / or perform other processes described herein.

[0547] In another design, the communication device 1000 can be configured to perform the functions of the terminal device in the foregoing embodiment one: the processor 1001 can be configured to perform Figure 4 step S102 in the foregoing embodiment one, and / or perform other processes described herein; the transceiver 1002 can be configured to receive Figure 4 the first indication information and the second indication information transmitted in step S101 in the foregoing embodiment one, and / or perform other processes described herein.

[0548] In an design, the communication apparatus 1000 can be configured to perform the functions of the network device in the foregoing embodiment two: the processor 1001 can generate Figure 5 the first indication information and the third indication information sent in step S201 and the second indication information sent in step S203, and / or other procedures for performing the technologies described herein; the transceiver 1002 can be configured to receive Figure 5 the first indication information and the third indication information sent in step S201 and the second indication information sent in step S203 in the foregoing embodiment two, and / or other procedures for performing the technologies described herein.

[0549] In another design, the communication apparatus 1000 can be configured to perform the functions of the terminal device in the foregoing embodiment two: the processor 1001 can be configured to perform Figure 5 the steps S202 and S204 in the foregoing embodiment two, and / or other procedures for performing the technologies described herein; the transceiver 1002 can be configured to receive Figure 5 the first indication information and the third indication information sent in step S201 and the second indication information sent in step S203 in the foregoing embodiment two, and / or other procedures for performing the technologies described herein.

[0550] In an design, the communication apparatus 1000 can be configured to perform the functions of the network device in the foregoing embodiment three: the processor 1001 can generate Figure 6 the fourth indication information and the third indication information sent in step S301 and the first indication information sent in step S303 in the foregoing embodiment three, and / or other procedures for performing the technologies described herein; the transceiver 1002 can be configured to perform Figure 6 the steps S301 and S303 in the foregoing embodiment three, and / or other procedures for performing the technologies described herein.

[0551] In another design, the communication apparatus 1000 can be configured to perform the functions of the terminal device in the foregoing embodiment three: the processor 1001 can be configured to perform Figure 6 the steps S302 and S304 in the foregoing embodiment three, and / or other procedures for performing the technologies described herein; the transceiver 1002 can be configured to receive Figure 6 the fourth indication information and the third indication information sent in step S301 and the first indication information sent in step S303 in the foregoing embodiment three, and / or other procedures for performing the technologies described herein.

[0552] In an design, the communication apparatus 1000 can be configured to perform the functions of the network device in the foregoing embodiment four: the processor 1001 can generate Figure 7 the fifth indication information and the second indication information sent in step S401 in the foregoing embodiment four, and / or other procedures for performing the technologies described herein; the transceiver 1002 can be configured to perform Figure 7In the step S401, and / or other procedures for the techniques described herein.

[0553] In another design, the communication apparatus 1000 can be configured to perform the functions of the terminal device in the aforementioned embodiment four: the processor 1001 can be configured to perform the following functions: Figure 7 In the step S402, and / or other procedures for performing the techniques described herein; the transceiver 1002 can be configured to receive the fifth indication information and the second indication information transmitted in the step S401, and / or other procedures for the techniques described herein. Figure 7 In the step S401, and / or other procedures for the techniques described herein.

[0554] In one design, the communication apparatus 1000 can be configured to perform the functions of the network device in the aforementioned embodiment five: the processor 1001 can be configured to generate the fifth indication information and the third indication information transmitted in the step S501, and the second indication information transmitted in the step S503, and / or other procedures for performing the techniques described herein. Figure 8 In the step S501 and the step S503, and / or other procedures for the techniques described herein. Figure 8

[0555] In another design, the communication apparatus 1000 can be configured to perform the functions of the terminal device in the aforementioned embodiment five: the processor 1001 can be configured to perform the following functions: Figure 8 In the step S502, and / or other procedures for performing the techniques described herein; the transceiver 1002 can be configured to receive the fifth indication information and the third indication information transmitted in the step S501, and the second indication information transmitted in the step S503, and / or other procedures for the techniques described herein. Figure 8 In the step S501 and the step S503, and / or other procedures for the techniques described herein.

[0556] In any of the above designs, the processor 1001 can include a transceiver for implementing the receiving and transmitting functions. For example, the transceiver can be a transceiver circuit, or an interface, or an interface circuit. The transceiver circuit, the interface, or the interface circuit for implementing the receiving and transmitting functions can be separate, or integrated together. The above transceiver circuit, the interface, or the interface circuit can be used for reading and writing of codes / data, or the above transceiver circuit, the interface, or the interface circuit can be used for transmission or transfer of signals.

[0557] In any of the above designs, the processor 1001 can store instructions, which can be a computer program. The computer program can run on the processor 1001, and can cause the communication apparatus 1000 to perform the methods described in the above method embodiments. The computer program can be fixed in the processor 1001, in which case the processor 1001 can be implemented by hardware.

[0558] ​In an implementation, the communication apparatus 1000 can include circuitry that can implement the functions of transmitting or receiving or communicating in the foregoing method embodiments. The processor and transceiver described in the present application can be implemented on an integrated circuit (IC), an analog IC, a radio frequency integrated circuit (RFIC), a mixed-signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), positive channel metal oxide semiconductor (PMOS), bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0559] The scope of the communication apparatus described in the present application is not limited thereto, and the structure of the communication apparatus can not be limited by Figure 10 The communication apparatus can be a stand-alone device or can be a part of a larger device. For example, the communication apparatus can be:

[0560] (1) a stand-alone integrated circuit (IC), or a chip, or a chip system or subsystem;

[0561] (2) a set of one or more ICs, optionally including a storage component for storing data, computer programs, etc.

[0562] (3) an ASIC, such as a Modem;

[0563] (4) a module that can be embedded in other devices;

[0564] (5) a receiver, a terminal, a smart terminal, a cellular phone, a wireless device, a handset, a mobile unit, a car device, a network device, a cloud device, an artificial intelligence device, etc.

[0565] (6) other, etc.

[0566] In another possible implementation manner, Figure 9 In the communication apparatus shown, the processing unit 20 can be one or more logic circuits, and the transceiver unit 10 can be an input / output interface, also referred to as a communication interface, or an interface circuit, or an interface, etc. Alternatively, the transceiver unit 10 can also be a transmitting unit and a receiving unit, the transmitting unit can be an output interface, and the receiving unit can be an input interface, and the transmitting unit and the receiving unit are integrated in one unit, for example, an input / output interface. See Figure 11 , Figure 11 is another structural schematic diagram of the communication apparatus provided in the embodiments of the present application. As shown in Figure 11 , Figure 11 The communication apparatus shown includes a logic circuit 901 and an interface 902. That is, the processing unit 20 described above can be implemented by the logic circuit 901, and the transceiver unit 10 can be implemented by the interface 902. The logic circuit 901 can be a chip, a processing circuit, an integrated circuit, or a system on chip (SoC) chip, etc., and the interface 902 can be a communication interface, an input / output interface, a pin, etc. Exemplarily, Figure 11 is an example in which the above communication apparatus is a chip, which includes the logic circuit 901 and the interface 902.

[0567] In the embodiments of the present application, the logic circuit and the interface can also be coupled to each other. The specific connection manner of the logic circuit and the interface is not limited in the embodiments of the present application.

[0568] Exemplarily, when the communication apparatus is used to execute the method or the function or the step executed by the network device in the first embodiment described above, the logic circuit 901 is configured to generate the first indication information and the second indication information; and the interface 902 is configured to output the first indication information and the second indication information.

[0569] Exemplarily, when the communication apparatus is used to execute the method or the function or the step executed by the terminal device in the first embodiment described above, the interface 902 is configured to input the first indication information and the second indication information; and the logic circuit 901 is configured to determine one combination from the multiple combinations according to the value of the second indication information.

[0570] It can be understood that the specific description about the first indication information and the second indication information can refer to the method embodiments shown above, which will not be repeated here.

[0571] Exemplarily, when the communication apparatus is used to execute the method or the function or the step executed by the network device in the second embodiment described above, the logic circuit 901 is configured to generate the first indication information and the third indication information; and the interface 902 is configured to output the first indication information and the third indication information.

[0572] For example, when the communication apparatus is configured to perform the method or functions or steps performed by the terminal device in Embodiment Two, the interface 902 is configured to input the first indication information and the third indication information; and the logic circuit 901 is configured to determine one combination from the plurality of combinations according to the third indication information.

[0573] It can be understood that the specific description of the first indication information and the third indication information can refer to the method embodiments shown above, and will not be repeated here.

[0574] For example, when the communication apparatus is configured to perform the method or functions or steps performed by the network device in Embodiment Three, the logic circuit 901 is configured to generate the fourth indication information and the third indication information; and the interface 902 is configured to output the fourth indication information and the third indication information.

[0575] For example, when the communication apparatus is configured to perform the method or functions or steps performed by the terminal device in Embodiment Three, the interface 902 is configured to input the fourth indication information and the third indication information; and the logic circuit 901 is configured to determine one DMRS port index group from the plurality of DMRS port index groups according to the third indication information.

[0576] It can be understood that the specific description of the third indication information and the fourth indication information can refer to the method embodiments shown above, and will not be repeated here.

[0577] For example, when the communication apparatus is configured to perform the method or functions or steps performed by the network device in Embodiment Four, the logic circuit 901 is configured to generate the fifth indication information and the second indication information; and the interface 902 is configured to output the fifth indication information and the second indication information.

[0578] For example, when the communication apparatus is configured to perform the method or functions or steps performed by the terminal device in Embodiment Four, the interface 902 is configured to input the fifth indication information and the second indication information; and the logic circuit 901 is configured to determine one SRS resource index group from the plurality of SRS resource index groups according to the value of the second indication information.

[0579] It can be understood that the specific description of the fifth indication information and the second indication information can refer to the method embodiments shown above, and will not be repeated here.

[0580] For example, when the communication apparatus is configured to perform the method or functions or steps performed by the network device in Embodiment Five, the logic circuit 901 is configured to generate the fifth indication information and the third indication information; and the interface 902 is configured to output the fifth indication information and the third indication information.

[0581] For example, when the communication apparatus is used to perform the method or function or step performed by the terminal device in the fifth preceding embodiment, the interface 902 is configured to input the fifth indication information and the third indication information; and the logic circuit 901 is configured to determine one SRS resource index group from the plurality of SRS resource index groups according to the third indication information.

[0582] It can be understood that the specific description of the fifth indication information and the third indication information can refer to the method embodiments shown above, and will not be repeated here.

[0583] It can be understood that the communication apparatus shown in the embodiments of the present application can be in the form of hardware to implement the method provided by the embodiments of the present application, or in the form of software to implement the method provided by the embodiments of the present application, and the embodiments of the present application do not limit this.

[0584] For Figure 11 The specific implementation of each embodiment shown above can also refer to the above-mentioned embodiments, and will not be described in detail here.

[0585] The embodiments of the present application also provide a wireless communication system, which includes a network device and a terminal device, and the network device and the terminal device can be used to perform the method in any of the preceding embodiments.

[0586] In addition, the present application also provides a computer program for implementing the operations and / or processes performed by the network device in the method provided by the present application.

[0587] The present application also provides a computer program for implementing the operations and / or processes performed by the terminal device in the method provided by the present application.

[0588] The present application also provides a computer readable storage medium, which stores computer code, when the computer code is run on a computer, the computer executes the operations and / or processes performed by the network device in the method provided by the present application.

[0589] The present application also provides a computer readable storage medium, which stores computer code, when the computer code is run on a computer, the computer executes the operations and / or processes performed by the terminal device in the method provided by the present application.

[0590] The present application also provides a computer program product, which includes computer code or computer program, when the computer code or computer program is run on a computer, the operations and / or processes performed by the network device in the method provided by the present application are executed.

[0591] The application further provides a computer program product comprising computer code or a computer program which, when run on a computer, causes the operations and / or processes performed by the terminal device in the method provided by the application to be performed.

[0592] In several embodiments provided in the application, it should be understood that the disclosed system, device and method can be implemented in other manners. For example, the described device embodiments are merely schematic. For example, the division of the units is only a logical function division. There can be another division manner for the actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0593] The units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the technical effects of the solutions provided in the embodiments of the application.

[0594] In addition, each functional unit in the various embodiments of the application can be integrated into a processing unit, or each unit can exist physically, or two or more units can be integrated into one unit. The integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0595] The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the application essentially or the parts that make contributions to the prior art, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a computer readable storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the application. The aforementioned computer readable storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0596] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An information indicating method characterized by comprising: The network device sends first indication information, the first indication information is used for indicating the combination of the transmission layer number and the transmission precoding matrix indicator (TPMI) index corresponding to the transmission layer number, the first indication information has at least a first value, the first value indicates a plurality of combinations of the transmission layer number and the TPMI index, the plurality of combinations includes a first combination and a second combination; The network device sends second indication information, the second indication information is used for indicating a demodulation reference signal (DMRS) port index; The value of the second indication information belongs to one of a plurality of sets, the plurality of sets includes at least a first set and a second set, when the second indication information is a value in the first set, the DMRS port index is associated with the first combination, when the second indication information is a value in the second set, the DMRS port index is associated with the second combination. The transmission layer number in the first combination is one of 1, 2, 3, and 4, and the transmission layer number in the second combination is one of 5, 6, 7, and 8.

2. The method of claim 1, wherein, When the transmission layer number in the first combination is 1, the transmission layer number in the second combination is 5; 3. The method of claim 2, wherein, When the transmission layer number in the first combination is 2, the transmission layer number in the second combination is 6; When the transmission layer number in the first combination is 3, the transmission layer number in the second combination is 7; When the transmission layer number in the first combination is 4, the transmission layer number in the second combination is 8. When the transmission layer number in the first combination is 1, the transmission layer number in the second combination is 8; 4. The method of claim 2, wherein, When the transmission layer number in the first combination is 2, the transmission layer number in the second combination is 7; When the transmission layer number in the first combination is 3, the transmission layer number in the second combination is 6; When the transmission layer number in the first combination is 4, the transmission layer number in the second combination is 5. The first indication information and the second indication information are carried in a downlink control information.

5. The method according to any one of claims 1-4, characterized in that, The first indication information is a precoding information and layer number field in the downlink control information, and the second indication information is an antenna port field in the downlink control information.

6. The method according to any one of claims 1-4, characterized in that, The terminal device receives first indication information, the first indication information is used for indicating the combination of the transmission layer number and the transmission precoding matrix indicator (TPMI) index corresponding to the transmission layer number, the first indication information has at least a first value, the first value indicates a plurality of combinations of the transmission layer number and the TPMI index, the plurality of combinations includes a first combination and a second combination; 7. An information indicating method characterized by comprising: The terminal device receives second indication information, the second indication information is used for indicating a demodulation reference signal (DMRS) port index; The value of the second indication information belongs to one of a plurality of sets, the plurality of sets includes at least a first set and a second set, when the second indication information is a value in the first set, the DMRS port index is associated with the first combination, when the second indication information is a value in the second set, the DMRS port index is associated with the second combination; ​ ​ The terminal device determines one combination from the multiple combinations according to a value of the second indication information.

8. The method of claim 7, wherein, The number of transmission layers in the first combination is one of 1, 2, 3, and 4, and the number of transmission layers in the second combination is one of 5, 6, 7, and 8.

9. The method of claim 8, wherein, When the number of transmission layers in the first combination is 1, the number of transmission layers in the second combination is 5. When the number of transmission layers in the first combination is 2, the number of transmission layers in the second combination is 6. When the number of transmission layers in the first combination is 3, the number of transmission layers in the second combination is 7. When the number of transmission layers in the first combination is 4, the number of transmission layers in the second combination is 8.

10. The method of claim 8, wherein, When the number of transmission layers in the first combination is 1, the number of transmission layers in the second combination is 8. When the number of transmission layers in the first combination is 2, the number of transmission layers in the second combination is 7. When the number of transmission layers in the first combination is 3, the number of transmission layers in the second combination is 6. When the number of transmission layers in the first combination is 4, the number of transmission layers in the second combination is 5.

11. The method according to any one of claims 7-10, characterized in that, The first indication information and the second indication information are both carried in downlink control information.

12. The method according to any one of claims 7-10, characterized in that, The first indication information is precoding information and a layer number field in the downlink control information, and the second indication information is an antenna port field in the downlink control information.

13. A communications device, characterized by Comprise: A transceiving unit configured to send first indication information, the first indication information being used to indicate a combination of a number of transmission layers and a TPMI index, the number of transmission layers and the TPMI index corresponding to each other, the first indication information having at least a first value, the first value indicating multiple combinations of a number of transmission layers and a TPMI index, the multiple combinations including a first combination and a second combination; The transceiving unit is configured to send second indication information, the second indication information being used to indicate a DMRS port index; a value of the second indication information belongs to one of multiple sets, the multiple sets including at least a first set and a second set, when the second indication information is a value in the first set, the DMRS port index is associated with the first combination, and when the second indication information is a value in the second set, the DMRS port index is associated with the second combination.

14. The apparatus of claim 13, wherein, The number of transmission layers in the first combination is one of 1, 2, 3, and 4, and the number of transmission layers in the second combination is one of 5, 6, 7, and 8.

15. The apparatus of claim 14, wherein, When the number of transmission layers in the first combination is 1, the number of transmission layers in the second combination is 5. When the number of transmission layers in the first combination is 2, the number of transmission layers in the second combination is 6. When the number of transmission layers in the first combination is 3, the number of transmission layers in the second combination is 7. When the number of transmission layers in the first combination is 4, the number of transmission layers in the second combination is 8.

16. The apparatus of claim 14, wherein, When the number of transmission layers in the first combination is 1, the number of transmission layers in the second combination is 8. When the number of transmission layers in the first combination is 2, the number of transmission layers in the second combination is 7. When the number of transmission layers in the first combination is 3, the number of transmission layers in the second combination is 6. When the number of transmission layers in the first combination is 4, the number of transmission layers in the second combination is 5.

17. The apparatus of any one of claims 13-16, wherein, The first indication information and the second indication information are both carried in downlink control information.

18. The apparatus of any one of claims 13-16, wherein, The first indication information is a precoding information and a number of layers field in the downlink control information, and the second indication information is an antenna port field in the downlink control information.

19. A communications device, characterized by Comprising: a transceiver unit, configured to receive first indication information, the first indication information being used to indicate a combination of a number of transmission layers and a transmission precoding matrix indicator (TPMI) index, the number of transmission layers corresponding to the TPMI index, the first indication information having at least a first value, the first value indicating a plurality of combinations of the number of transmission layers and the TPMI index, the plurality of combinations including a first combination and a second combination; the transceiver unit is further configured to receive second indication information, the second indication information being used to indicate a demodulation reference signal (DMRS) port index; a value of the second indication information belonging to one of a plurality of sets, the plurality of sets including at least a first set and a second set, when the second indication information is a value in the first set, the DMRS port index being associated with the first combination, and when the second indication information is a value in the second set, the DMRS port index being associated with the second combination; a processing unit, configured to determine one combination from the plurality of combinations according to the value of the second indication information.

20. The apparatus of claim 19, wherein, The number of transmission layers in the first combination is one of 1, 2, 3, and 4, and the number of transmission layers in the second combination is one of 5, 6, 7, and 8.

21. The apparatus of claim 20, wherein, When the number of transmission layers in the first combination is 1, the number of transmission layers in the second combination is 5. When the number of transmission layers in the first combination is 2, the number of transmission layers in the second combination is 6. When the number of transmission layers in the first combination is 3, the number of transmission layers in the second combination is 7. When the number of transmission layers in the first combination is 4, the number of transmission layers in the second combination is 8.

22. The apparatus of claim 20, wherein, When the number of transmission layers in the first combination is 1, the number of transmission layers in the second combination is 8. When the number of transmission layers in the first combination is 2, the number of transmission layers in the second combination is 7. When the number of transmission layers in the first combination is 3, the number of transmission layers in the second combination is 6. When the number of transmission layers in the first combination is 4, the number of transmission layers in the second combination is 5.

23. The apparatus of any one of claims 19-22, wherein, The first indication information and the second indication information are both carried in downlink control information.

24. The apparatus of any one of claims 19-22, wherein, The first indication information is a precoding information and a number of layers field in the downlink control information, and the second indication information is an antenna port field in the downlink control information.

25. A communications device, characterized by Comprising a processor, a transceiver, and a memory; the memory is configured to store instructions; the processor is configured to execute the instructions, so that the method in any one of claims 1 to 12 is executed.

26. A communications device, characterized by Comprising a logic circuit and an interface, the logic circuit and the interface being coupled; the interface is configured to input and / or output code instructions, and the logic circuit is configured to execute the code instructions, so that the method in any one of claims 1 to 12 is executed.

27. A computer readable storage medium, characterized in that, The computer readable storage medium is for storing a computer program which, when executed, causes the method of any one of claims 1 to 12 to be performed.

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