Communication method and communication apparatus

Abstract

The embodiment of the application discloses a communication method and a communication device, the method comprises the following steps: a terminal device sends an uplink reference signal to an access network device according to a sending pattern, the uplink reference signal resource of the uplink reference signal comprises N ports, the N ports in the sending pattern are carried on 2 or more OFDM symbols, or the N ports in the sending pattern are carried on 2 or more frequency domain combs and 1 OFDM symbol, the N is an integer greater than 4; the terminal device receives precoding indication information from the access network device, the precoding indication information is used for indicating the precoding adopted by uplink data transmission, the precoding indication information is obtained by the access network device according to the uplink reference signal, and the rows of the matrix corresponding to the precoding correspond to the N ports one by one; by carrying the N ports included in the same uplink reference signal resource on 2 or more OFDM symbols, the orthogonality between each port in the N ports can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication, and in particular to a communication method and a communication device. BACKGROUND

[0002] A sounding reference signal (SRS) is an uplink reference signal sent by a terminal device to an access network device (for example, a base station). The SRS is used by the access network device to obtain an uplink (UL) channel of the terminal device. Alternatively, the SRS is used by the access network device to obtain a downlink (DL) channel of the terminal device according to channel reciprocity, so as to perform data scheduling on the terminal device according to the channel information. Each SRS resource includes SRS ports, and each SRS port corresponds to a specific time-frequency code resource. In an ideal case, the SRS ports are orthogonal, and each SRS port corresponds to a physical antenna or a virtual antenna of the terminal device. When the orthogonality between the SRS ports in one SRS resource is weak, when the terminal device sends an SRS occupying the SRS resource, coherent transmission occurs between different antennas, resulting in poor quality of the transmitted SRS. Therefore, in order to ensure the signal quality of the SRS sent by the terminal device, it is necessary to study a time-frequency mapping scheme of the SRS resource that makes the orthogonality between the SRS ports strong. SUMMARY

[0003] Embodiments of the present application disclose a communication method and a communication device.

[0004] In a first aspect, the embodiments of the present application provide a communication method, which includes: a terminal device sending an uplink reference signal to an access network device according to a sending pattern, an uplink reference signal resource of the uplink reference signal including N ports, at least two groups of ports existing in the N ports in the sending pattern, each group of ports corresponding to a same time-frequency resource, different groups of ports respectively corresponding to different time-frequency resources, the N ports in the sending pattern being carried in 2 or more than 2 orthogonal frequency division multiplexing (OFDM) symbols, or the N ports in the sending pattern being carried in 2 or more than 2 frequency domain combs and 1 OFDM symbol, the N being an integer greater than 4; the terminal device receiving precoding indication information from the access network device, the precoding indication information being used to indicate precoding adopted for uplink data transmission, a row of a matrix corresponding to the precoding corresponding to the N ports one by one.

[0005] Optionally, the precoding indication information is obtained by the access network device according to the uplink reference signal.

[0006] Optionally, the sending antenna of the uplink data transmission corresponds to each port in the plurality of uplink reference signals. The terminal device sending the uplink reference signal to the access network device according to the sending pattern can be replaced by: the terminal device sending the uplink reference signal according to the sending pattern according to configuration information; the configuration information indicates that the terminal device sends the uplink reference signal according to the sending pattern. The configuration information can be the configuration information of the uplink reference signal resource, such as the sounding reference signal (SRS) resource. The N ports in the sending pattern are carried in 2 or more OFDM symbols can be replaced by: the sending pattern indicates that the N ports are carried in 2 or more OFDM symbols. The N ports in the sending pattern are carried in 2 or more frequency domain combs and 1 OFDM symbol can be replaced by: the sending pattern indicates that the N ports are carried in 2 or more frequency domain combs and 1 OFDM symbol.

[0007] In the embodiments of the application, the terminal device sends the uplink reference signal to the access network device according to the sending pattern, so that the N (greater than 4) ports included in the uplink reference signal resource of the uplink reference signal are carried in 2 or more OFDM symbols; by carrying the N ports included in the same uplink reference signal resource in 2 or more OFDM symbols, the orthogonality between each port in the N ports can be improved. The terminal device sends the uplink reference signal to the access network device according to the sending pattern, so that the N (greater than 4) ports included in the uplink reference signal resource of the uplink reference signal are carried in 2 or more frequency domain combs and 1 OFDM symbol, and the precoding indication information indicates that the rows of the matrix corresponding to the precoding used by the terminal device for uplink data transmission are one-to-one corresponding to the N ports included in the uplink reference signal resource; a scheme for carrying the uplink reference signal using the uplink reference signal resource including the N ports is provided.

[0008] In a possible implementation, the method further includes: the terminal device determines the sending pattern from two or more patterns according to the CS reference value of the uplink reference signal included in the configuration information of the uplink reference signal resource. The sending pattern is determined from two or more patterns.

[0009] In this implementation, the terminal device determines the sending pattern from two or more patterns according to the CS reference value of the uplink reference signal. The sending pattern is determined from two or more patterns; the sending pattern suitable for the terminal device to send the uplink reference signal can be quickly and accurately determined.

[0010] In a possible implementation, the method further includes: determining, by the terminal device, a CS value of each SRS port according to the CS reference value indication and an index of each SRS port in the N ports; and the CS value of each port is used to generate a sending sequence of each port.

[0011] In this implementation, the CS value of each SRS port can be quickly and accurately determined.

[0012] In a possible implementation, the determining, by the terminal device, of the CS value of each SRS port according to the CS reference value indication and the index of each SRS port in the N ports includes: determining The p i represents an index of the i th port in the N ports (for example, 1001), represents a maximum CS indication, represents a CS reference value indication; the determining of the CS value of the i th port in the N ports i ,

[0013] In this implementation, when p o ∈{1000, 1001, 1003, 1004}, when p i ∈{1002, 1003, 1005, 1006},

[0014]

[0015] So that the ports located in the same frequency domain comb occupy uneven CS, and the remaining CS guarantees a large interval and is left for other terminal devices to occupy.

[0016] In a possible implementation, the determining, by the terminal device, of the CS value of each SRS port according to the CS reference value indication and the index of each SRS port in the N ports includes: determining, by the terminal device, the CS value of each SRS port according to the CS reference value indication, the index of each SRS port in the N ports,

[0017] The determining wherein K ∈{1, 2}, represents a maximum CS indication, represents a CS reference value indication, P i represents an index of the i th port in the N ports (for example, 1001), is 8; the determining of the CS value of the i th port in the N ports ​determining a CS value α of an i-th port in the N ports i ,

[0018] In this way, the CS values of each port located in the same time-frequency resource can be allocated with equal intervals and as large intervals as possible.

[0019] In a possible implementation, the method further includes: determining, by the terminal device, the sending pattern from two or more patterns according to a CS reference value indication, a maximum CS indication, and a symbol number included in the configuration information of the uplink reference signal resource; the two or more patterns include at least two of a first pattern, a second pattern, a third pattern, and a fourth pattern; and the symbol number indicates a number of OFDM symbols carrying the N ports. a comb corresponding to a second port set in the N ports is indexes of OFDM symbols corresponding to two ports in the first port set are l, and indexes of OFDM symbols corresponding to the other two ports in the first port set are (l+n); indexes of OFDM symbols corresponding to two ports in the second port set are l, and indexes of OFDM symbols corresponding to the other two ports in the second port set are (l+n); the n is an integer greater than or equal to 1, and the l is an integer greater than or equal to 0; a comb corresponding to a first port set and a second port set in the N ports in the second pattern is indexes of OFDM symbols corresponding to the first port set are l, and indexes of OFDM symbols corresponding to the second port set are (l+n); the l and the n are integers greater than or equal to 1; a comb corresponding to a first port set in the N ports in the third pattern is a comb corresponding to a second port set in the N ports is and indexes of OFDM symbols corresponding to the first port set and the second port set are l; the l is an integer greater than or equal to 1; combs corresponding to four port sets in the N ports in the fourth pattern are and indexes of OFDM symbols corresponding to the four port sets are l; the l is an integer greater than or equal to 1; ports included in the first port set are different from ports included in the second port set.

[0020] In this implementation, the terminal device determines the sending pattern from two or more patterns according to a CS reference value of the uplink reference signal a maximum CS and the symbol number, the sending pattern is determined from two or more patterns; the sending pattern suitable for the terminal device to send the uplink reference signal can be determined quickly and accurately.

[0021] In a possible implementation, the method further includes: the terminal device determining the sending pattern from two or more patterns according to the CS reference value indication and the maximum CS indication of the uplink reference signal included in the configuration information of the uplink reference signal resource.

[0022] In this implementation, the terminal device determines the sending pattern from two or more patterns according to the CS reference value of the uplink reference signal and the maximum CS In this implementation, the terminal device determines the sending pattern from two or more patterns according to the CS reference value of the uplink reference signal

[0023] In a second aspect, an embodiment of the present application provides another communication method, which includes: an access network device receiving an uplink reference signal sent by a terminal device, an uplink reference signal resource of the uplink reference signal including N ports, the N ports being carried in 2 or more orthogonal frequency division multiplexing (OFDM) symbols, or the N ports being carried in 2 or more frequency domain combs and 1 OFDM symbol, N being an integer greater than 4; and the access network device sending precoding indication information to the terminal device, the precoding indication information being used to indicate precoding adopted by the terminal device for uplink data transmission, the precoding indication information being obtained by the access network device according to the uplink reference signal, and rows of a matrix corresponding to the precoding corresponding to the N ports one by one.

[0024] In an embodiment of the present application, an access network device receives an uplink reference signal sent by a terminal device, the uplink reference signal resource including N (greater than 4) ports, and the access network device sends precoding indication information to the terminal device, the precoding indication information indicating that rows of a matrix corresponding to precoding adopted by the terminal device for uplink data transmission correspond to the N ports included in the uplink reference signal resource one by one; a scheme of carrying an uplink reference signal by using an uplink reference signal resource including N ports is provided.

[0025] In a third aspect, an embodiment of the present application provides another communication method, which includes: a terminal device sending a plurality of uplink reference signals according to configuration information of a plurality of uplink reference signal resources; and the terminal device receiving precoding and transmission layer number indication information, the precoding and transmission layer number indication information being used to indicate a precoding and transmission layer number used by the terminal device for uplink data transmission, and the precoding and transmission layer number indication information corresponding to the plurality of uplink reference signals; wherein the transmission layer number is less than or equal to a total number of ports included in the plurality of uplink reference signals, a number of rows of a matrix corresponding to the precoding is the total number of ports included in the plurality of uplink reference signals, and each row of the matrix corresponds to each port included in the plurality of uplink reference signals. The total number of ports included in the plurality of uplink reference signals can be understood as a total number of ports included in the plurality of uplink reference signal resources.

[0026] Optionally, the precoding and transmission layer number indication information is obtained by the access network device according to the uplink reference signal.

[0027] Optionally, a transmission antenna of the uplink data transmission corresponds to each port in the plurality of uplink reference signals.

[0028] Optionally, the precoding and transmission layer number indication information includes a plurality of first indication information, and the plurality of first indication information corresponds to the plurality of uplink reference signal resources one by one.

[0029] Optionally, the transmission layer number of the uplink data is a sum of transmission layer numbers indicated in the plurality of first indication information.

[0030] In an embodiment of the present application, the uplink reference signal for codebook-based uplink data transmission is carried on a plurality of uplink reference signal resources. In this way, flexible resource configuration of the uplink reference signal, and corresponding precoding indication and transmission layer number indication can be supported.

[0031] In a fourth aspect, an embodiment of the present application provides another communication method, which includes: an access network device receiving a plurality of uplink reference signals from a terminal device; the access network device generating precoding and transmission layer number indication information according to the plurality of uplink reference signals; and the access network device sending the precoding and transmission layer number indication information to the terminal device, the precoding and transmission layer number indication information being used to indicate a precoding and transmission layer number used by the terminal device for uplink data transmission, and the precoding and transmission layer number indication information corresponding to the plurality of uplink reference signals; wherein the transmission layer number is less than or equal to a total number of ports included in the plurality of uplink reference signals, a number of rows of a matrix corresponding to the precoding is the total number of ports included in the plurality of uplink reference signals, and each row of the matrix corresponds to each port included in the plurality of uplink reference signals.

[0032] In the embodiments of the present application, the access network device sends precoding and transmission layer indication information to the terminal device, the precoding and transmission layer indication information corresponds to multiple uplink reference signals, and one precoding and transmission layer indication information does not need to be sent for each uplink reference signal, so that signaling overhead can be reduced.

[0033] In a fifth aspect, the embodiments of the present application provide a terminal device having a function of implementing the operations in the method embodiments of the first aspect. The function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions. In a possible implementation, the terminal device includes a transceiver module and a processing module, wherein: the processing module is configured to control the transceiver module to send an uplink reference signal to an access network device according to a sending pattern, the uplink reference signal resource includes N ports, the N ports in the sending pattern correspond to different time-frequency resources respectively, the N ports in the sending pattern are carried in 2 or more OFDM symbols, or the N ports in the sending pattern are carried in 2 or more frequency domain combs and 1 OFDM symbol, and N is an integer greater than 4; the transceiver module is further configured to receive precoding indication information from the access network device, the precoding indication information is used to indicate precoding adopted for uplink data transmission, the precoding indication information is obtained by the access network device according to the uplink reference signal, and the rows of a matrix corresponding to the precoding correspond to the N ports one by one. The processing module configured to control the transceiver module to send an uplink reference signal to an access network device according to a sending pattern can be replaced by: the processing module is configured to control the transceiver module to send an uplink reference signal according to a sending pattern according to configuration information; and the configuration information indicates that the terminal device sends an uplink reference signal according to the sending pattern.

[0034] In a possible implementation of the first aspect or the fifth aspect, the uplink reference signal is an SRS, the uplink reference signal resource is an SRS resource, the uplink data is carried in a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH), and N is 8. The method further includes: the terminal device maps the uplink data to antenna ports according to the precoding, the number of the antenna ports is the same as the number of the ports of the SRS resource, and the antenna ports correspond to the ports of the SRS resource one by one.

[0035] In the implementation, a resource mapping scheme including 8 SRS ports in an SRS resource is provided, and the SRS resource design in a scenario with a large number of SRS ports is supported.

[0036] In a possible implementation of the first aspect or the fifth aspect, the N is 8, the N ports in the transmission pattern are carried on 2 frequency domain combs with a frequency domain comb degree of 2 and 2 OFDM symbols, and two ports located on the same frequency domain comb and OFDM symbol correspond to 2 different cyclic shifts (CSs); or the N ports in the transmission pattern are carried on 1 frequency domain comb with a frequency domain comb degree of 2 and 2 OFDM symbols, and four ports located on the same frequency domain comb and OFDM symbol correspond to 4 different CSs; or the N ports in the transmission pattern are carried on 2 frequency domain combs with a frequency domain comb degree of 2 and 1 OFDM symbol, and four ports located on the same frequency domain comb and OFDM symbol correspond to 4 different CSs.

[0037] In the implementation, the base station can flexibly configure the transmission pattern based on the channel state of the terminal device. Specifically, when the uplink transmission power of the terminal device is limited, a transmission pattern occupying multiple OFDM symbols can be configured, and when the base station has a high requirement on the phase accuracy of the terminal device, a transmission pattern occupying one OFDM symbol can be configured.

[0038] In a possible implementation of the fifth aspect, the processing module is further configured to determine, according to the CS reference value of the uplink reference signal indicated in the configuration information of the uplink reference signal resource determine the transmission pattern from two or more patterns. In the implementation, the terminal device determines the transmission pattern according to the CS reference value of the uplink reference signal determine the transmission pattern from two or more patterns; and switch the transmission pattern through the redundant information in the CS reference value, which can simplify the configuration signaling design.

[0039] In a possible implementation of the fifth aspect, the processing module is further configured to determine, according to the CS reference value and the index of each SRS port in the N ports, the CS value of each SRS port; and the CS value of each port is used to generate a transmission sequence of each port.

[0040] In a possible implementation of the fifth aspect, the processing module is specifically configured to determine the p i indicates the index of the i th port in the N ports (for example, 1001), indicates the maximum CS indication, indicates a CS reference value indication; according to the determining a CS value α i ,

[0041] In this implementation mode, so that the ports located in the same frequency domain comb occupy uneven CS, and the remaining CS ensures a large interval, leaving for other terminal devices to occupy.

[0042] In a possible implementation mode of the fifth aspect, the processing module is specifically configured to determine the CS value α

[0043] wherein K ∈ {1, 2}, indicates a maximum CS indication, indicates a CS reference value indication, p i indicates an index of the i-th port in the N ports (for example, 1001), is 8; according to the determining a CS value α i ,

[0044] In a possible implementation mode of the first aspect or the fifth aspect, the configuration information further includes a comb position indication of the uplink reference signal and a frequency domain comb degree K TC The two or more patterns include at least two of a first pattern, a second pattern, and a third pattern; a comb corresponding to a first port set in the N ports in the first pattern is a comb corresponding to a second port set in the N ports in the first pattern is indexes of OFDM symbols corresponding to two ports in the first port set are l, indexes of OFDM symbols corresponding to the other two ports in the first port set are (l+n), indexes of OFDM symbols corresponding to two ports in the second port set are l, and indexes of OFDM symbols corresponding to the other two ports in the second port set are (l+n), the n is an integer greater than or equal to 1, and the l is an integer greater than or equal to 0; a comb corresponding to a first port set and a second port set in the N ports in the second pattern is indexes of OFDM symbols corresponding to the first port set are l, indexes of OFDM symbols corresponding to the second port set are (l+n), the n is an integer greater than or equal to 1, and the l is an integer greater than or equal to 0; a comb corresponding to a first port set in the N ports in the third pattern is a second set of ports in the N ports corresponds to a comb and an index of an OFDM symbol corresponding to the first set of ports and the second set of ports is l, the l is an integer greater than or equal to 0; ports included in the first set of ports and ports included in the second set of ports are different.

[0045] In the implementation, the N ports in the sending pattern are carried on the frequency domain combs and the OFDM symbols in a manner, which can make the orthogonality between the ports stronger and the power spectrum density of each SRS port can be improved by occupying multiple OFDM symbols by one SRS resource.

[0046] In a possible implementation of the first aspect or the fifth aspect, the N is 8, the N ports in the sending pattern are carried on 2 frequency domain combs with a frequency domain comb degree of 4 and 2 OFDM symbols, two ports located on a same frequency domain comb and OFDM symbol correspond to 2 different CS values; or, the N ports in the sending pattern are carried on 1 frequency domain comb with a frequency domain comb degree of 4 and 2 OFDM symbols, four ports located on a same frequency domain comb and OFDM symbol correspond to 4 different CS values; or, the N ports in the sending pattern are carried on 2 frequency domain combs with a frequency domain comb degree of 4 and 1 OFDM symbol, four ports located on a same frequency domain comb and OFDM symbol correspond to 4 different CS values; or, the N ports in the sending pattern are carried on 4 frequency domain combs with a frequency domain comb degree of 4 and 1 OFDM symbol, two ports located on a same frequency domain comb and OFDM symbol correspond to 2 different CS values.

[0047] In the implementation, the N ports in the sending pattern are carried on the frequency domain combs and the OFDM symbols in a manner, which can make the orthogonality between the ports stronger.

[0048] In a possible implementation of the first aspect or the fifth aspect, the configuration information further includes a comb position indication and a frequency domain comb degree K TC The two or more patterns include at least two of a first pattern, a second pattern, a third pattern and a fourth pattern; a first set of ports in the N ports in the first pattern corresponds to a comb a second set of ports in the N ports corresponds to a comb two ports in the first port set correspond to OFDM symbol with index of l, another two ports in the first port set correspond to OFDM symbol with index of (l+n), two ports in the second port set correspond to OFDM symbol with index of l, another two ports in the second port set correspond to OFDM symbol with index of (l+n), n is an integer greater than or equal to 1, and l is an integer greater than or equal to 0; the comb corresponding to the first port set and the second port set in the N ports in the second pattern is the first port set corresponds to OFDM symbol with index of l, the second port set corresponds to OFDM symbol with index of (l+n), l and n are integers greater than or equal to 1; the comb corresponding to the first port set in the N ports in the third pattern is the comb corresponding to the second port set in the N ports is the first port set and the second port set correspond to OFDM symbol with index of l, and l is an integer greater than or equal to 1; the combs corresponding to the four port sets in the N ports in the fourth pattern are the four port sets correspond to OFDM symbol with index of l, l is an integer greater than or equal to 1, and the ports included in the first port set are different from the ports included in the second port set.

[0049] In this implementation, the manner in which the N ports in the sending pattern are carried on the frequency domain comb and the OFDM symbol can make the orthogonality between the ports stronger and the occupation of multiple OFDM symbols by one SRS resource can improve the power spectral density of each SRS port.

[0050] In a possible implementation of the fifth aspect, the processing module is further configured to determine the sending pattern from two or more patterns according to a CS reference value indication, a maximum CS indication, and a symbol number included in the configuration information of the uplink reference signal resource; the two or more patterns include at least two of a first pattern, a second pattern, a third pattern, and a fourth pattern; and the symbol number indicates the number of OFDM symbols carrying the N ports; the comb corresponding to the first port set in the N ports in the first pattern is the comb corresponding to the second port set in the N ports is two ports in the first port set correspond to OFDM symbol index l, another two ports in the first port set correspond to OFDM symbol index (l+n), two ports in the second port set correspond to OFDM symbol index l, and another two ports in the second port set correspond to OFDM symbol index (l+n), n is an integer greater than or equal to 1, and l is an integer greater than or equal to 0; the comb corresponding to the first port set and the second port set in the N ports in the second pattern is the first port set corresponds to OFDM symbol index l, and the second port set corresponds to OFDM symbol index (l+n), l and n are integers greater than or equal to 1; the comb corresponding to the first port set in the N ports in the third pattern is and the comb corresponding to the second port set in the N ports is and the first port set and the second port set correspond to OFDM symbol index l, l is an integer greater than or equal to 1; the combs corresponding to the four port sets in the N ports in the fourth pattern are and the four port sets correspond to OFDM symbol index l, l is an integer greater than or equal to 1, and the ports included in the first port set are different from the ports included in the second port set.

[0051] In this implementation, the terminal device determines the transmission pattern from two or more patterns according to the CS reference value of the uplink reference signal Maximum CS and the number of symbols.

[0052] In a possible implementation of the first aspect or the fifth aspect, the N is 8, the N ports in the sending pattern are carried on 2 frequency domain combs with a frequency domain comb degree of 8 and 2 OFDM symbols, and two ports located on the same frequency domain comb and OFDM symbol correspond to 2 different CS values; or, the N ports in the sending pattern are carried on 1 frequency domain comb with a frequency domain comb degree of 8 and 2 OFDM symbols, and four ports located on the same frequency domain comb and OFDM symbol correspond to 4 different CS values; or, the N ports in the sending pattern are carried on 2 frequency domain combs with a frequency domain comb degree of 8 and 1 OFDM symbol, and four ports located on the same frequency domain comb and OFDM symbol correspond to 4 different CS values; or, the N ports in the sending pattern are carried on 4 frequency domain combs with a frequency domain comb degree of 8 and 1 OFDM symbol, and two ports located on the same frequency domain comb and OFDM symbol correspond to 2 different CS values.

[0053] In this implementation, the N ports in the sending pattern are carried on a frequency domain comb and an OFDM symbol in such a manner that the orthogonality between the ports is strong.

[0054] In a possible implementation of the first aspect or the fifth aspect, the sending power of the uplink reference signal is determined according to the sending pattern; when the sending pattern indicates that the N ports are carried on OFDM symbols, the maximum sending power of each port does not exceed wherein P CMAX is the maximum sending power configured for the terminal device, is an integer greater than 1, the is equal to the N.

[0055] In this implementation, the N ports are carried on OFDM symbols, which can make the actual sending power of the SRS resource corresponding to the SRS be times of the total sending power, and can improve the channel measurement accuracy.

[0056] The technical effects brought by the various possible implementations of the fifth aspect can refer to the introduction of the technical effects of the first aspect or the various possible implementations of the first aspect.

[0057] In a sixth aspect, an access network device is provided, which has functions to implement the operations in the method embodiments of the second aspect. The functions can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions. In a possible implementation, the access network device includes a transceiver module and a processing module, wherein: the transceiver module is configured to receive an uplink reference signal sent by a terminal device, the uplink reference signal resource of the uplink reference signal includes N ports, the N ports are carried on 2 or more than 2 orthogonal frequency division multiplexing (OFDM) symbols, or the N ports are carried on 2 or more than 2 frequency domain combs and 1 OFDM symbol, N is an integer greater than 4; the processing module is configured to process precoding indication information according to the uplink reference signal; and the transceiver module is further configured to send the precoding indication information to the terminal device, the precoding indication information is used to indicate precoding adopted by the terminal device for uplink data transmission, the precoding indication information is obtained by the access network device according to the uplink reference signal, and the rows of a matrix corresponding to the precoding correspond to the N ports one by one.

[0058] In a possible implementation of the second aspect or the sixth aspect, the uplink reference signal is an SRS, the uplink reference signal resource is an SRS resource, the uplink data is carried on a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH), and N is 8; the precoding is used for the terminal device to map the uplink data to antenna ports, the number of the antenna ports is the same as the number of the SRS resource ports, and the antenna ports correspond to the SRS resource ports one by one.

[0059] In this implementation, the precoding is used for the terminal device to map the uplink data to antenna ports, the antenna ports correspond to the SRS resource ports one by one, and a resource mapping scheme in which the SRS resource includes 8 SRS ports is provided.

[0060] In a possible implementation of the second aspect or the sixth aspect, N is 8, the N ports are carried on 2 frequency domain combs with a frequency domain comb degree of 2 and 2 OFDM symbols, two ports located on the same frequency domain comb and OFDM symbol correspond to 2 different cyclic shifts (CSs), or the N ports are carried on 1 frequency domain comb with a frequency domain comb degree of 2 and 2 OFDM symbols, four ports located on the same frequency domain comb and OFDM symbol correspond to 4 different CS values, or the N ports are carried on 2 frequency domain combs with a frequency domain comb degree of 2 and 1 OFDM symbol, four ports located on the same frequency domain comb and OFDM symbol correspond to 4 different CS values.

[0061] In this implementation, the N ports are carried on the frequency domain combs and OFDM symbols in a manner that can make the orthogonality between the ports stronger.

[0062] In a possible implementation of the second aspect or the sixth aspect, the N is 8, the N ports are carried on 2 frequency domain combs with a frequency domain comb degree of 4 and 2 OFDM symbols, and two ports located on the same frequency domain comb and OFDM symbol correspond to 2 different CS values; or the N ports are carried on 1 frequency domain comb with a frequency domain comb degree of 4 and 2 OFDM symbols, and four ports located on the same frequency domain comb and OFDM symbol correspond to 4 different CS values; or the N ports are carried on 2 frequency domain combs with a frequency domain comb degree of 4 and 1 OFDM symbol, and four ports located on the same frequency domain comb and OFDM symbol correspond to 4 different CS values; or the N ports are carried on 4 frequency domain combs with a frequency domain comb degree of 4 and 1 OFDM symbol, and two ports located on the same frequency domain comb and OFDM symbol correspond to 2 different CS values.

[0063] In this implementation, the N ports are carried on the frequency domain combs and OFDM symbols in a manner that can make the orthogonality between the ports stronger.

[0064] In a possible implementation of the second aspect or the sixth aspect, the N ports are carried on 2 frequency domain combs with a frequency domain comb degree of 8 and 2 OFDM symbols, and two ports located on the same frequency domain comb and OFDM symbol correspond to 2 different CS values; or the N ports are carried on 1 frequency domain comb with a frequency domain comb degree of 8 and 2 OFDM symbols, and four ports located on the same frequency domain comb and OFDM symbol correspond to 4 different CS values; or the N ports are carried on 2 frequency domain combs with a frequency domain comb degree of 8 and 1 OFDM symbol, and four ports located on the same frequency domain comb and OFDM symbol correspond to 4 different CS values; or the N ports are carried on 4 frequency domain combs with a frequency domain comb degree of 8 and 1 OFDM symbol, and two ports located on the same frequency domain comb and OFDM symbol correspond to 2 different CS values.

[0065] In this implementation, the N ports are carried on the frequency domain combs and OFDM symbols in a manner that can make the orthogonality between the ports stronger.

[0066] In a possible implementation of the second aspect or the sixth aspect, a first port set in the N ports corresponds to a comb A second port set in the N ports corresponds to a comb two ports in the first port set correspond to OFDM symbols with index l, another two ports in the first port set correspond to OFDM symbols with index (l+n), two ports in the second port set correspond to OFDM symbols with index l, another two ports in the second port set correspond to OFDM symbols with index (l+n), the n is an integer greater than or equal to 1, the l is an integer greater than or equal to 0, K TC is a frequency domain comb degree of the uplink reference signal, is a comb position indication of the uplink reference signal, and ports included in the first port set and ports included in the second port set are different.

[0067] In this implementation, the first port set corresponds to OFDM symbols with index l, and the second port set corresponds to OFDM symbols with index (l+n), which can improve the orthogonality between ports and can improve the power spectral density of each SRS port by occupying multiple OFDM symbols for one SRS resource.

[0068] In a possible implementation of the second aspect or the sixth aspect, the first port set and the second port set in the N ports correspond to combs the first port set corresponds to OFDM symbols with index l, and the second port set corresponds to OFDM symbols with index (l+n), the n is an integer greater than or equal to 1, the l is an integer greater than or equal to 0, K TC is a frequency domain comb degree of the uplink reference signal, is a comb position indication of the uplink reference signal, and ports included in the first port set and ports included in the second port set are different.

[0069] In this implementation, the first port set corresponds to OFDM symbols with index l, and the second port set corresponds to OFDM symbols with index (l+n), which can improve the orthogonality between ports and can improve the power spectral density of each SRS port by occupying multiple OFDM symbols for one SRS resource.

[0070] In a possible implementation of the second aspect or the sixth aspect, the first port set in the N ports corresponds to a comb the second port set in the N ports corresponds to a comb and the first port set and the second port set correspond to OFDM symbols with index l, the l is an integer greater than or equal to 0, K TC is a frequency domain comb degree of the uplink reference signal, The ports included in the first port set and the ports included in the second port set are different for the comb position indication of the uplink reference signal.

[0071] In the implementation mode, the indexes of the OFDM symbols corresponding to the first port set and the second port set are l, and the overhead of the OFDM symbols can be reduced. The combs corresponding to the first port set are The combs corresponding to the second port set are The orthogonality among the ports can be made stronger.

[0072] In a possible implementation mode of the second aspect or the sixth aspect, the combs corresponding to the four port sets in the N ports are The indexes of the OFDM symbols corresponding to the four port sets are l, the l is an integer greater than or equal to 1, the ports included in each of the four port sets are different, K TC The frequency domain comb degree of the uplink reference signal is K, The comb position indication of the uplink reference signal is K.

[0073] In the implementation mode, the combs corresponding to the four port sets are The orthogonality among the ports can be made stronger.

[0074] In a possible implementation mode of the second aspect or the sixth aspect, the transmission power of the uplink reference signal is determined by the terminal device according to a transmission pattern; when the transmission pattern indicates that the N ports are borne on OFDM symbols, the maximum transmission power of each port does not exceed P CMAX The maximum transmission power of the terminal device configured is P The integer greater than 1 is K, The N is equal to the N.

[0075] In the implementation mode, the N ports are borne on OFDM symbols, the actual transmission power of the SRS resource corresponding to the SRS can be times of the total transmission power, and the channel measurement accuracy can be improved.

[0076] The technical effects brought by the various possible implementation modes of the sixth aspect can be referred to the introduction of the technical effects of the second aspect or the various possible implementation modes of the second aspect.

[0077] In a seventh aspect, an embodiment of the present application provides another terminal device having functions to implement the operations in the method embodiments of the third aspect. The functions can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions. In a possible implementation, the terminal device includes a transceiver module and a processing module, wherein: the processing module is configured to generate a plurality of uplink reference signals according to configuration information of a plurality of uplink reference signal resources; the transceiver module is configured to send the plurality of uplink reference signals; the transceiver module is further configured to receive precoding and transmission layer number indication information, the precoding and transmission layer number indication information being used to indicate a precoding and transmission layer number adopted by the terminal device for uplink data transmission, and the precoding and transmission layer number indication information corresponding to the plurality of uplink reference signals; wherein the transmission layer number is less than or equal to a total number of ports included in the plurality of uplink reference signals, and a number of rows of a matrix corresponding to the precoding is equal to the total number of ports included in the plurality of uplink reference signals, and each row of the matrix corresponds to each port included in the plurality of uplink reference signals. The total number of ports included in the plurality of uplink reference signals can be understood as a total number of ports included in the plurality of uplink reference signal resources.

[0078] In a possible implementation of the third aspect or the seventh aspect, the plurality of uplink reference signals are a plurality of SRSs, the plurality of uplink reference signal resources are a plurality of SRS resources, and the plurality of uplink reference signal resources include two first SRS resources, and a number of ports included in the first SRS resources is 4.

[0079] In this implementation, the plurality of uplink reference signal resources include two first SRS resources, a number of ports included in the first SRS resources is 4, and each row of a matrix corresponding to the precoding corresponds to each port included in the plurality of uplink reference signals. The time-frequency resource mapping mode of each port (for example, 8 ports) included in the plurality of uplink reference signals can be obtained through the precoding and transmission layer number indication information.

[0080] In a possible implementation of the third aspect or the seventh aspect, the two first SRS resources include an SRS resource 1 and an SRS resource 2, an antenna port corresponding to a port of the SRS resource 1 is of a first polarization direction, and an antenna port corresponding to a port of the SRS resource 2 is of a second polarization direction; or, for an i-th stream of uplink data transmission, a precoding corresponding to a port of the SRS resource 1 is v i , and a precoding corresponding to a port of the SRS resource 2 is n is an integer; wherein a number of elements in the v i is 4, and i is a positive integer.

[0081] In another possible implementation manner, the precoding and transmission layer number indication information includes two transmission indication fields, the two transmission indication fields correspond to two uplink reference signal resources one by one, and the transmission layer number of the uplink data is the sum of the transmission layer numbers indicated by the two transmission indication fields; the precoding and transmission layer number indication information further includes phase indication information The phase rotation between antennas corresponding to the two uplink reference signal resources is indicated.

[0082] In another possible implementation manner, the precoding and transmission layer number indication information includes one precoding beam indication field, one transmission layer number indication field and one phase indication information The precoding beam indication field is used to indicate a transmission beam corresponding to each uplink reference signal resource, the transmission layer number indication field is used to indicate a transmission layer number of uplink data, and the phase indication information The phase rotation between antennas corresponding to the two uplink reference signal resources is indicated.

[0083] In this implementation manner, it can be ensured that the antenna ports in the same polarization direction are simultaneously transmitted in the same SRS resource, so that the beams in two polarization directions can be uniformly indicated, and for each stream data, only the polarization phase deviation needs to be additionally indicated, thereby reducing the overhead of DCI precoding indication.

[0084] Optionally, in the implementation manner described above, the coherence capability of the terminal device is full coherence.

[0085] Optionally, in the implementation manner described above, the precoding is full-coherent code word.

[0086] In a possible implementation manner of the third aspect or the seventh aspect, the multiple uplink reference signals are multiple SRSs, the multiple uplink reference signal resources are multiple SRS resources, the multiple uplink reference signal resources include two second SRS resources and one first SRS resource, the first SRS resource includes four ports, and the second SRS resource includes two ports; or the multiple uplink reference signal resources include four second SRS resources, and each second SRS resource includes two ports.

[0087] In this implementation manner, the rows of the precoding corresponding matrix correspond to each port included in the multiple uplink reference signals one by one; and the terminal device can obtain the time-frequency resource mapping mode of each port (for example, eight ports) included in the multiple uplink reference signals through the precoding and transmission layer number indication information.

[0088] In a possible implementation of the third aspect or the seventh aspect, the uplink reference signal resource is an SRS resource, the kth SRS resource in the plurality of SRS resources corresponds to the layers of the uplink data, and the precoding matrix has non-zero elements in the kth column of the mth row, where m is a positive integer less than or equal to the number of ports of the kth SRS resource, and k is an integer greater than 0. The kth column of the mth row of the precoding matrix corresponds to the ports of the kth SRS resource. The kth column of the mth row of the precoding matrix corresponds to the ports of the kth SRS resource. k The kth column of the mth row of the precoding matrix corresponds to the ports of the kth SRS resource.

[0089] Optionally, in the implementation, the precoding is a partially coherent code word.

[0090] Optionally, in the implementation, the coherence capability of the terminal device is partial coherence.

[0091] In this implementation, the antenna ports that can be coherently transmitted are located in the same SRS resource, so that the antenna ports that can be coherently transmitted can be simultaneously transmitted, improving the channel measurement accuracy of the base station. Meanwhile, the precoding design only needs to indicate the phase for each port in one SRS resource, simplifying the precoding design.

[0092] In a possible implementation of the third aspect or the seventh aspect, the precoding and the number-of-transmission-layer indication information includes a plurality of transmission indication fields, the plurality of transmission indication fields correspond to the plurality of uplink reference signal resources one by one, the rows of the precoding matrix in the plurality of transmission indication fields correspond to the ports in the corresponding uplink reference signal resources one by one, and the number of transmission layers of the uplink data is the sum of the numbers of transmission layers indicated by the plurality of transmission indication fields.

[0093] In this implementation, the rows of the precoding matrix in the plurality of transmission indication fields correspond to the ports in the corresponding uplink reference signal resources one by one, and the terminal device can obtain the information about the plurality of SRS resources used for transmitting the uplink data through the PUSCH or the PUCCH according to the precoding and the number-of-transmission-layer indication information, reducing the signaling overhead.

[0094] In a possible implementation form of the third aspect or the seventh aspect, the multiple uplink reference signal resources are multiple SRS resources, the precoding and transmission layer number indication information is precoding indication information, and the precoding and transmission layer indication information comprises a sounding reference signal resource indicator (SRI), a transmission rank indicator (TRI), and a transmission precoding matrix indicator (TPMI), the SRI is used to indicate two or more of the multiple SRS resources, the TPMI is used to indicate the precoding, and the TRI indicates the transmission layer.

[0095] In this implementation form, the SRI is used to indicate multiple SRS resources, and the number of ports included in the precoding matrix is the sum of the number of ports included in the multiple uplink reference signals; the terminal device can obtain, according to the precoding and transmission layer number indication information, information about the multiple SRS resources used for transmitting uplink data through the PUSCH or the PUCCH, and signaling overhead is small.

[0096] In a possible implementation form of the third aspect or the seventh aspect, the multiple SRS resources indicated by the SRI each independently correspond to a data layer transmitted through the PUSCH or the PUCCH. In other words, the multiple SRS resources indicated by the SRI correspond to independent layers and layer mapping.

[0097] In this implementation form, the multiple SRS resources indicated by the SRI each independently correspond to a data stream transmitted through the PUSCH or the PUCCH, and 8-port SRS resources (i.e., 8 SRS ports) can be split and transmitted on multiple OFDM symbols, and SRS transmission power boosting is supported to improve channel measurement accuracy.

[0098] The technical effects brought by the various possible implementation forms of the seventh aspect can be referred to the introduction of the technical effects of the third aspect or the various possible implementation forms of the third aspect.

[0099] In an eighth aspect, an embodiment of the present application provides another access network device having a function of implementing the operations in the method embodiment of the fourth aspect. The function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions. In a possible implementation, the access network device includes a transceiver module and a processing module, wherein: the transceiver module is configured to receive a plurality of uplink reference signals from a terminal device; the processing module is configured to generate precoding and transmission layer number indication information according to the plurality of uplink reference signals; the transceiver module is further configured to send the precoding and transmission layer number indication information to the terminal device, the precoding and transmission layer number indication information being used to indicate a precoding and transmission layer number adopted by the terminal device for uplink data transmission, and the precoding and transmission layer number indication information corresponding to the plurality of uplink reference signals; and the transmission layer number is less than or equal to a total number of ports included in the plurality of uplink reference signals, a row number of a matrix corresponding to the precoding is the total number of ports included in the plurality of uplink reference signals, and the rows of the matrix correspond to the respective ports included in the plurality of uplink reference signals one by one.

[0100] In a possible implementation of the fourth aspect or the eighth aspect, the plurality of uplink reference signals are a plurality of SRSs, the plurality of uplink reference signal resources are a plurality of SRS resources, the plurality of uplink reference signal resources include two first SRS resources, and a number of ports included in the first SRS resources is 4.

[0101] In this implementation, the plurality of uplink reference signal resources include two first SRS resources, a number of ports included in the first SRS resources is 4, and rows of a matrix corresponding to the precoding correspond to the respective ports included in the plurality of uplink reference signals one by one; 8-port SRS (i.e., 8 SRS ports) transmission is supported by supporting a plurality of SRS resource aggregation.

[0102] In a possible implementation of the fourth aspect or the eighth aspect, the precoding is a full-coherent code word, the two first SRS resources include SRS resource 1 and SRS resource 2, an antenna port corresponding to a port of the SRS resource 1 is a first polarization direction, and an antenna port corresponding to a port of the SRS resource 2 is a second polarization direction; or for an i-th stream, a precoding corresponding to a port of the SRS resource 1 is v i , and a precoding corresponding to a port of the SRS resource 2 is n is an integer; wherein a number of elements in the v i is 4, and i is an integer.

[0103] In this implementation, it can be ensured that the antenna ports cannot be transmitted in correlation.

[0104] In one possible implementation of the fourth or eighth aspect, the plurality of uplink reference signals are a plurality of SRS, the plurality of uplink reference signal resources are a plurality of SRS resources, the plurality of uplink reference signal resources include two second SRS resources and one first SRS resource, the first SRS resource includes 4 ports and the second SRS resource includes 2 ports; or, the plurality of uplink reference signal resources include four second SRS resources, the second SRS resource includes 2 ports.

[0105] In this implementation, the rows of the precoding matrix correspond one-to-one with the ports included in the multiple uplink reference signals; 8-port SRS (i.e., 8 SRS ports) transmission is supported by aggregating multiple SRS resources. Since the time-frequency resource location of each SRS resource can be configured independently, the 8-port SRS can be split and transmitted on multiple OFDM symbols, supporting increased SRS transmission power and thus improving channel measurement accuracy. Furthermore, this approach leverages the design of existing 2-port and 4-port SRS resources supported by existing protocols, and maximizes the reuse of existing TPMI codebooks.

[0106] In one possible implementation of the fourth or eighth aspect, the precoding is a partially coherent codeword, the uplink reference signal resource is an SRS resource, and the k-th SRS resource among the plurality of SRS resources is related to the k-th SRS resource of the uplink data. Corresponding to the layer, the precoded first The row containing the non-zero element in the column corresponds one-to-one with the port of the k-th SRS resource, where m k The number of ports is a positive integer less than or equal to the number of ports of the k-th SRS resource, where k is a positive integer greater than 0; any two SRS resources among the plurality of SRS resources correspond to different layers of the uplink data; the uplink data corresponds to a PUSCH or PUCCH.

[0107] In one possible implementation of the fourth or eighth aspect, the precoding and transmission layer number indication information includes multiple transmission indication fields, each of which corresponds one-to-one with the multiple uplink reference signal resources, and the rows of the precoding matrix in the multiple transmission indication fields correspond one-to-one with the ports in the corresponding uplink reference signal resources; the transmission layer number of the uplink data is the sum of the transmission layers indicated by the multiple transmission indication fields.

[0108] In the implementation, the rows of the precoding matrix in the multiple transmission indication fields correspond to the ports in the corresponding uplink reference signal resources one by one, so that the terminal device can obtain the information about the multiple SRS resources used for transmitting uplink data through the PUSCH or the PUCCH according to the precoding and the transmission layer indication information, and the signaling overhead is small.

[0109] In a possible implementation of the fourth aspect or the eighth aspect, the multiple uplink reference signal resources are multiple SRS resources, the precoding and the transmission layer indication information is precoding indication information, and the precoding and the transmission layer indication information includes an SRI, a TRI and a TPMI. The SRI is used for indicating two or more of the multiple SRS resources, the TPMI is used for indicating the precoding, and the TRI is used for indicating the transmission layer.

[0110] In the implementation, the SRI is used for indicating the multiple SRS resources, and the number of the rows of the precoding matrix is the sum of the number of the ports included in the multiple uplink reference signal resources; so that the terminal device can obtain the information about the multiple SRS resources used for transmitting uplink data through the PUSCH or the PUCCH according to the precoding and the transmission layer indication information, and the signaling overhead is small.

[0111] In a possible implementation of the fourth aspect or the eighth aspect, the multiple SRS resources indicated by the SRI each independently correspond to a data stream transmitted through the PUSCH or the PUCCH. In other words, the multiple SRS resources indicated by the SRI correspond to independent streams and stream mapping.

[0112] In the implementation, the multiple SRS resources indicated by the SRI each independently correspond to a data stream transmitted through the PUSCH or the PUCCH, and the 8-port SRS can be split and transmitted on multiple OFDM symbols, and the SRS transmission power can be lifted to improve the channel measurement accuracy.

[0113] In a possible implementation of the fourth aspect or the eighth aspect, the F ports included in each SRS resource indicated by the SRI correspond to consecutive N rows in the matrix, and the SRS resources indicated by the SRI correspond to the rows of the matrix from small to large in the order of the index from small to large.

[0114] In the implementation, the existing 2-port and 4-port SRS resource design can be reused.

[0115] The technical effects brought by the various possible implementations of the eighth aspect can be referred to the introduction of the technical effects of the fourth aspect or the various possible implementations of the fourth aspect.

[0116] In a ninth aspect, the present application provides a communication apparatus, comprising a processor, which can be configured to execute computer-executable instructions stored in a memory to cause the method in the first aspect or any possible implementation of the first aspect to be performed, or to cause the method in the second aspect or any possible implementation of the second aspect to be performed, or to cause the method in the third aspect or any possible implementation of the third aspect to be performed, or to cause the method in the fourth aspect or any possible implementation of the fourth aspect to be performed.

[0117] In the embodiments of the present application, in the process of executing the above method, the process of sending information in the above method can be understood as the process of outputting information based on the instructions of the processor. When outputting the information, the processor outputs the information to the transceiver so as to be transmitted by the transceiver. After the information is output by the processor, it can also need to be processed further and then reach the transceiver. Similarly, when the processor receives the input information, the transceiver receives the information and inputs it to the processor. Furthermore, after the transceiver receives the information, the information can need to be processed further and then be input to the processor.

[0118] For the sending and / or receiving operations of the processor, if no special description is given, or if it does not contradict the actual role or inherent logic in the related description, it can be generally understood as being output based on the instructions of the processor.

[0119] In the implementation process, the processor can be a processor specially used for executing the methods, or a processor executing the computer instructions in the memory to execute the methods, such as a general-purpose processor. For example, the processor can also be configured to execute a program stored in the memory, and when the program is executed, the communication apparatus executes the method in the first aspect or any possible implementation of the first aspect. In a possible implementation, the memory is located outside the communication apparatus. In a possible implementation, the memory is located inside the communication apparatus.

[0120] In the embodiments of the present application, the processor and the memory can also be integrated into one device, that is, the processor and the memory can also be integrated together.

[0121] In a possible implementation, the communication apparatus further comprises a transceiver, which is configured to receive a packet or send a packet, etc.

[0122] In a tenth aspect, the present application provides another kind of communication apparatus, which comprises a processing circuit and an interface circuit, the interface circuit is used to acquire data or output data; the processing circuit is used to execute the corresponding method shown in the first aspect or any possible implementation manner of the first aspect, or the processing circuit is used to execute the corresponding method shown in the second aspect or any possible implementation manner of the second aspect, or the processing circuit is used to execute the corresponding method shown in the third aspect or any possible implementation manner of the third aspect, or the processing circuit is used to execute the corresponding method shown in the fourth aspect or any possible implementation manner of the fourth aspect.

[0123] In an eleventh aspect, the present application provides a computer readable storage medium, which is used to store a computer program, when the computer program is run on a computer, the method shown in the first aspect or any possible implementation manner of the first aspect is executed, or the method shown in the second aspect or any possible implementation manner of the second aspect is executed, or the method shown in the third aspect or any possible implementation manner of the third aspect is executed, or the method shown in the fourth aspect or any possible implementation manner of the fourth aspect is executed.

[0124] In a twelfth aspect, the present application provides a computer program product, which comprises a computer program or computer code, when the computer program or computer code is run on a computer, the method shown in the first aspect or any possible implementation manner of the first aspect is executed, or the method shown in the second aspect or any possible implementation manner of the second aspect is executed, or the method shown in the third aspect or any possible implementation manner of the third aspect is executed, or the method shown in the fourth aspect or any possible implementation manner of the fourth aspect is executed.

[0125] In a thirteenth aspect, the present application provides a communication system, which comprises the terminal device shown in the fifth aspect or any possible implementation manner of the fifth aspect and the access network device shown in the sixth aspect or any possible implementation manner of the sixth aspect.

[0126] In a fourteenth aspect, the present application provides another kind of communication system, which comprises the terminal device shown in the seventh aspect or any possible implementation manner of the seventh aspect and the access network device shown in the eighth aspect or any possible implementation manner of the eighth aspect. BRIEF DESCRIPTION OF DRAWINGS

[0127] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background art, the drawings needed to be used in the embodiments of the present application or the background art will be described below.

[0128] Figure 1Examples of three different comb teeth degrees provided for the present application;

[0129] Figure 2 Examples of a scanning bandwidth and a frequency modulation bandwidth provided for the present application;

[0130] Figure 3 A comparison diagram of transmission power provided for the embodiments of the present application;

[0131] Figure 4 Examples of a wireless communication system provided for the embodiments of the present application;

[0132] Figure 5 An interactive flowchart of a communication method provided for the embodiments of the present application;

[0133] Figure 6 Another interactive flowchart of a communication method provided for the embodiments of the present application;

[0134] Figure 7 Examples of a first pattern, a second pattern, and a third pattern provided for the embodiments of the present application;

[0135] Figure 8 Another interactive flowchart of a communication method provided for the embodiments of the present application;

[0136] Figure 9 Examples of a first pattern, a second pattern, a third pattern, and a fourth pattern provided for the embodiments of the present application;

[0137] Figure 10 Another interactive flowchart of a communication method provided for the embodiments of the present application;

[0138] Figure 11 Examples of a first pattern, a second pattern, a third pattern, and a fourth pattern provided for the embodiments of the present application;

[0139] Figure 12 Another interactive flowchart of a communication method provided for the embodiments of the present application;

[0140] Figure 13 Another interactive flowchart of a communication method provided for the embodiments of the present application;

[0141] Figure 14 A diagram of an antenna architecture provided for the embodiments of the present application;

[0142] Figure 15 A diagram of another antenna architecture provided for the embodiments of the present application;

[0143] Figure 16 A diagram of another antenna architecture provided for the embodiments of the present application;

[0144] Figure 17 A structural diagram of a communication apparatus 1700 is shown;

[0145] Figure 18 A structural diagram of another communication apparatus 180 provided by embodiments of the present application is shown;

[0146] Figure 19 A structural diagram of another communication apparatus 190 provided by embodiments of the present application is shown. DETAILED DESCRIPTION

[0147] The terms "first" and "second" and the like in the description, claims and drawings of the present application merely mean different objects and do not describe a particular sequence. Furthermore, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device, etc. that includes a list of steps or units is not limited to the listed steps or units but can optionally further include other steps or units not listed or can optionally further include other steps or units inherent to such processes, methods, products or devices.

[0148] "Embodiments" mentioned herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0149] The terms used in the following embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to be limiting to the present application. As used in the specification and the appended claims of the present application, the singular forms "a", "an" and "the" are intended to include plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used in the present application means and includes any or all possible combinations of one or more listed items. For example, "A and / or B" can mean three cases: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The term "a plurality of" used in the present application means two or more.

[0150] First, some concepts related to embodiments of the present application are described.

[0151] 1、SRS, SRS port, comb of SRS

[0152] SRS is an uplink reference signal sent by a terminal device to an access network device (e.g., a base station). The access network device obtains the UL channel of the terminal device according to the SRS sent by the terminal device. Alternatively, the access network device obtains the DL channel of the terminal device according to channel reciprocity, so as to make data scheduling for the UE according to the channel information.

[0153] The SRS resource is semi-statically configured by the base station through a high-level parameter, including:

[0154] one SRS port (antenna port) p i = 1000 + i, the existing design only supports up to 4 SRS ports included in each SRS resource. Each SRS port corresponds to a specific time-frequency code resource. In an ideal case, each SRS port is orthogonal. Each SRS port corresponds to a physical antenna or a virtual antenna of the UE. For codebook-based uplink transmission, each port of the SRS resource corresponds to a physical antenna of the terminal device;

[0155] one continuous OFDM symbol;

[0156] Intra-slot symbol-level time-domain starting position l0∈{0,1,…,13};

[0157] Frequency domain starting position k0.

[0158] Comb of SRS: The frequency domain subcarriers on a comb of SRS are equally spaced, and the comb degree K TC ∈{2,4,8} is semi-statically configured by the base station through a high-level parameter, which determines the number of subcarriers between any two adjacent subcarriers on the comb. Figure 1 Examples of three different comb degrees of combs (or frequency domain combs) provided in the present application. Figure 1 In each grid, the frequency domain represents a resource element (RE). The black grid is an example of the RE positions occupied by one comb under different comb degrees.

[0159] 2, SRS scanning bandwidth and frequency hopping bandwidth

[0160] The SRS scanning bandwidth, frequency hopping bandwidth, and frequency hopping period are determined according to the high-level parameter and the protocol predefined table. When the base station does not configure the frequency scaling factor P FAt this time, the SRS scanning bandwidth is the bandwidth range corresponding to the channel obtained by the base station according to the SRS, the SRS frequency hopping bandwidth is the bandwidth range corresponding to the channel obtained by the base station after a single SRS transmission, the frequency hopping bandwidth is less than or equal to the scanning bandwidth, and the frequency hopping period is the number of SRS transmissions required for the base station to obtain the channel corresponding to the scanning bandwidth; when the base station configures the frequency scaling factor P through higher layer parameters... F At this time, the scanning bandwidth, frequency hopping bandwidth, and frequency hopping period of SRS remain unchanged, but the bandwidth of a single SRS transmission becomes 1 / P of the original bandwidth. F In this case, the scanning bandwidth is P times the bandwidth range corresponding to the channel obtained by the base station based on the SRS. F The SRS frequency hopping bandwidth is P times the bandwidth range of the channel obtained by the base station after a single SRS transmission. F times. Figure 2 An example of scanning bandwidth and frequency hopping bandwidth provided for this application. Figure 2 In the diagram, each grid cell represents a resource block (RB) in the frequency domain. The SRS scan bandwidth is 16 RBs, the frequency hopping bandwidth is 4 RBs, and the frequency hopping period is 4. The left diagram does not have a P configured. F The right image shows a configuration for P. F =2.

[0161] 3. Cyclic shift (CS) of SRS

[0162] The sequence used by SRS in LTE and NR It is a base sequence. Circular shift:

[0163]

[0164] Where α is the cyclic shift value, which is a real number; δ = log2(K TC ), where is an integer; u, v are indices of a base sequence in the SRS base sequence set, and are integers; j is the imaginary unit; M ZC is the length of the SRS sequence, which is a positive integer; n is the index of the element in the SRS sequence, which is an integer. The sequence elements are mapped sequentially onto the subcarriers corresponding to the SRS resources in ascending order of their indices.

[0165] SRS port p i The corresponding cyclic shift α i Defined by the following formula:

[0166]

[0167]

[0168] in, is the maximum cyclic shift value, according to K TC The values are defined respectively, refer to Table 1:

[0169] Table 1

[0170]

[0171] The meaning of can be understood as dividing the delay domain into parts, or can be understood as dividing the phase value 2 into parts, and each cyclic shift value corresponds to the starting point of each part. is the cyclic shift reference value, which is semi-statically configured by the base station through the high-level parameter transmissionComb.

[0172] For the same base sequence, different cyclic shift values can obtain different SRS sequences. When and satisfy, the sequence obtained by the base sequence and the cyclic shift is orthogonal to the sequence obtained by the base sequence and the cyclic shift, that is, the cross-correlation coefficient is zero. Wherein, the cross-correlation coefficient of the sequence s1(m) and s2(m), m=0,1,…,M-1, of length M is defined as: Due to the orthogonality, the base station can assign SRS sequences obtained based on the same base sequence and different cyclic shift values to different users, and these users can send these SRS sequences on the same time-frequency resource. When the channel between the user and the base station is flat within the SRS sequence length, these SRS sequences will not cause inter-user interference.

[0173] From formula (1) and formula (2), when SRS port number=2, , the CS corresponding to the two ports differs by 4, and the specific CS value occupied is determined by When SRS port number=2, , the CS corresponding to the two ports differs by 3. Except , this allocation method makes the interval between the CS values corresponding to the two ports in one SRS resource as large as possible.

[0174] 4, comb allocation of SRS port

[0175] The frequency domain starting position i of SRS port p is defined by the following formula:

[0176]

[0177] Wherein,

[0178]

[0179]

[0180]

[0181] Frequency hopping offset And partial sounding offset The calculation formula, n shift And The association with the present application is weak, and will not be described in detail here.

[0182] SRS port p i Occupied comb Defined by the following formula: The comb offset is configured by the base station through the high layer parameter transmissionComb.

[0183] As can be seen from the above formula (7), for the case of , whether each port of an SRS resource occupies two combs or one comb can be indicated by configuring . For example, when , the combs occupied by ports 1001 and 1003 are different from the combs occupied by 1000 and 1002. For another example, when , the combs occupied by ports 1001 and 1003 are the same as the combs occupied by 1000 and 1002.

[0184] 5. Codebook-based PUSCH transmission

[0185] For codebook-based PUSCH transmission, the phase of each transmission antenna of the terminal device transmitting PUSCH (TPMI) and the number of transmission streams need to be indicated, and each transmission antenna of the terminal device transmitting PUSCH corresponds one-to-one to each port of the SRS resource corresponding to the PUSCH. The precoding indication information of the access network device scheduling the PUSCH includes SRI, TRI, and TPMI. SRI is used to indicate the SRS resource corresponding to the PUSCH (used to determine the transmission antenna transmitting the PUSCH), TRI is used to indicate the transmission stream of the PUSCH, and TPMI is used to indicate the transmission phase of the transmission antenna corresponding to the PUSCH. The existing protocol defines the transmission mode of the PUSCH as follows: y = [y (0) (i) y (1) (i) … y (v-1) (i)] T , i = 0, 1, …, denotes the number of modulation symbols in a transmission layer, v is the number of transmission streams of PUSCH, y is the ith modulation symbol mapped to the kth stream, k = 0, …, v-1, y is mapped to the transmit antennas of PUSCH based on the precoding matrix W ({p0, p1, …, p ρ-1}, the physical meaning is: the data transmitted on each transmit antenna is z. The formula for mapping y to the transmit antennas of PUSCH based on the precoding matrix W is as follows:

[0186]

[0187] denotes the data transmitted on the transmit antenna p0.

[0188] In codebook-based PUSCH transmission, SRI usually indicates one SRS resource, and the number of rows of TPMI is the number of SRS ports in the SRS resource, which corresponds to each SRS port one by one.

[0189] The current allocation scheme of comb and CS for each port of one SRS resource is introduced below.

[0190] Currently, the allocation of comb and CS for SRS ports in one SRS resource is for the case of a maximum of 4 ports. For example, a 4-port SRS resource (i.e., an SRS resource including 4 ports) in the case of K TC = 2 supports the allocation of comb and CS through indicates whether the 4 ports included in one SRS resource are located in one comb or two combs. The access network device can select the number of combs occupied by an SRS resource according to the channel state of the terminal device by flexibly allocating the number of combs occupied by an SRS resource. For example, when the terminal device is in a non line of sight (NLOS) scenario, the channel delay spread is large, and the CS interval of the ports numbered adjacent to each other (occupying adjacent CS) can be increased as much as possible. The method is to use the allocation strategy of formula (7) to allocate the ports 1000 and 1002 to one comb, and the corresponding CS interval is 1001 and 1003 are allocated to another comb, and the corresponding CS interval is also Here, the CS interval of the two ports refers to the number of integers included between the CS values corresponding to the two ports respectively. When an SRS resource occupies one comb, the CS interval between adjacent ports is That is, for a 4-port SRS resource, there are two configurable CS intervals: 1 and 3.

[0191] 2-port SRS resource (i.e., one SRS resource including 2 ports) occupies one comb, and the CS interval between adjacent ports is TC = 2, the 2-port SRS resource and the 4-port SRS resource both support the maximum CS interval of 3, and it is insufficient to only support the CS interval of 1. Assuming that the time-domain discrete fourier transform (DFT) point number is N, the CS interval of 3 represents that the time-domain DFT point interval is 3*8 / N, and the CS interval of 1 represents that the time-domain DFT point interval is 8 / N.

[0192] It can be seen that, in the case of K TC = 2, the 2-port SRS resource and the 4-port SRS resource both support the maximum CS interval of 3, and it is insufficient to only support the CS interval of 1. Assuming that the time-domain discrete fourier transform (DFT) point number is N, the CS interval of 3 represents that the time-domain DFT point interval is 3*8 / N, and the CS interval of 1 represents that the time-domain DFT point interval is 8 / N.

[0193] 4-port SRS resource occupies one comb when K TC = 4, the CS interval between adjacent ports is The CS interval between adjacent ports in the same comb is

[0194] 2-port SRS resource occupies one comb when K TC = 4, the CS interval between adjacent ports is

[0195] It can be seen that, in the case of K TC = 4, the 2-port SRS resource and the 4-port SRS resource both support the maximum CS interval of 5, and it is insufficient to only support the CS interval of 2. Assuming that the time-domain DFT point number is N, the CS interval of 5 represents that the time-domain DFT point interval is 5*12 / N, and the CS interval of 2 represents that the time-domain DFT point interval is 2*12 / N.

[0196] 4-port SRS resource occupies one comb when K TC = 8, the CS interval between adjacent ports in the same comb is

[0197] 2-port SRS resource occupies one comb when K TC = 8, the CS interval between adjacent ports is

[0198] It can be seen that, in the case of K TCWith a value of 8, both 2-port SRS and 4-port SRS resources support a maximum CS interval of 2. Assuming the number of delay domain DFT points is N, a CS interval of 2 represents a delay domain DFT point interval of 2*6 / N.

[0199] For 8-port SRS resources, K TC =2. Under the current SRS combo structure, if all 8 ports are placed in one combo, it can only support mapping where adjacent ports have no CS interval. In this case, the orthogonality performance between ports is lower than that of existing 2-port SRS resources and 4-port SRS resources. If the 8 ports are evenly placed in two combos, the CS interval between adjacent ports within one combo is... It also fails to achieve the orthogonality level of existing 2-port SRS resources and 4-port SRS resources. To ensure the signal quality of SRS transmitted by terminal equipment, it is necessary to study a time-frequency mapping scheme for SRS resources that achieves strong orthogonality between SRS ports. This application provides a time-frequency mapping scheme for 8-port SRS resources, which can achieve the orthogonality level between ports that is comparable to that of existing 2-port SRS resources and 4-port SRS resources.

[0200] Currently, all ports within an SRS resource are mapped to the same OFDM symbol. In power-constrained scenarios, due to the limited total transmit power of the SRS on an OFDM, the transmit power of each SRS port may not meet the demodulation performance requirements. Figure 3 This is a comparative schematic diagram of transmission power provided for an embodiment of this application. For example... Figure 3 As shown, assuming Pcmax = 23dBm (i.e., total transmit power is 23dBm), for a 4-port SRS resource (ports 0 to 4), the maximum transmit power corresponding to each SRS port (ports 0, 1, 2, 3) is 17dBm. However, for an 8-port SRS resource (ports 0 to 8), the maximum transmit power corresponding to each SRS port is only 14dBm, resulting in a 3dB power loss for each SRS port. Therefore, it is necessary to study a time-frequency mapping scheme that maximizes the transmit power of each port when an SRS resource includes a large number of ports (e.g., 8 ports).

[0201] Some communication methods provided in this application employ a new time-frequency resource mapping scheme for SRS resources, which can make the orthogonality between ports stronger and / or make the transmission power of each port larger.

[0202] The communication method provided in the application is applicable to the scenarios of homogeneous networks and heterogeneous networks, and is not limited to transmission points, and can be multi-point cooperative transmission between macro base stations and macro base stations, micro base stations and micro base stations, and macro base stations and micro base stations, and is applicable to FDD / TDD systems. The communication method, the communication method, and the communication method provided in the application are applicable to low-frequency scenarios (sub-6G) and high-frequency scenarios (6G and above), single transmission reception point (transmission reception point, TRP) or multi-transmission reception point (multi-TRP) scenarios, and any derivative scenarios thereof. The communication method provided in the application can be applied to 5G, satellite communication, short-range wireless communication systems, etc.

[0203] It should be noted that the wireless communication system mentioned in the embodiments of the application includes but is not limited to: a narrow band Internet of Things (NB-IoT) system, a fourth generation (4th generation, 4G) communication system such as a long term evolution (LTE) system, a non-terrestrial network (NTN) system such as a satellite communication system, a fifth generation (5th generation, 5G) communication system or new radio (NR), and a 5G evolution communication system such as 6G, a wireless fidelity (WiFi) system, and a communication system supporting multiple wireless technology fusion.

[0204] The following will first introduce examples of several communication systems to which the communication scheme provided in the application is applicable.

[0205] Figure 4 An example of a wireless communication system provided in the embodiments of the application is shown in FIG. 1. Figure 4 As shown in FIG. 1, the communication system includes one or more terminal devices, Figure 4 only two terminal devices are taken as an example, and one or more access network devices (such as base stations) that can provide communication services for terminal devices, Figure 4 only one access network device is taken as an example. In some embodiments, the wireless communication system can be composed of cells, each cell containing one or more access network devices, and the access network devices providing communication services for multiple terminals. The wireless communication system can also perform point-to-point communication, such as communication between multiple terminals.

[0206] A terminal is a device with wireless transceiver function. The terminal can communicate with one or more core network (CN) devices (or core devices) through an access network device (or access device) in a radio access network (RAN). The terminal can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on water (such as ships, etc.); can also be deployed in the air (such as airplanes, balloons and satellites, etc.). In the embodiments of the present application, the terminal can also be referred to as a terminal device or a user equipment (UE), which can be a mobile phone, a mobile station (MS), a pad, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self driving, a wireless terminal device in remote medical, a wireless terminal device in smart grid, a wireless terminal in transportation safety, a wireless terminal device in smart city, a wireless terminal in smart home, a subscriber unit, a cellular phone, a wireless data card, a personal digital assistant (PDA) computer, a tablet computer, a laptop computer, a machine type communication (MTC) terminal, etc. The terminal can include various handheld devices with wireless communication function, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems. Alternatively, the terminal can be a handset with wireless communication function, a vehicle-mounted device, a wearable device or a terminal in Internet of Things, Internet of Vehicles, any form of terminal in a communication system evolved from 5G and beyond, etc., which is not limited in the present application.

[0207] The access network device can be any device with wireless transceiver function and capable of communicating with the terminal, such as a radio access network (RAN) node that accesses the terminal to the wireless network. Currently, some examples of the RAN node include: a macro base station, a micro base station (also known as a small station), a relay station, an access point, a gNB, a transmission reception point (TRP), an evolved Node B (eNB), a radio network controller (RNC), a home base station (for example, a home evolved NodeB, or a home Node B, HNB), a baseband unit (BBU), a WiFi access point (AP), an integrated access and backhaul (IAB), and the like.

[0208] The communication method provided by the embodiments of the present application will be described below with reference to the accompanying drawings.

[0209] Figure 5 A communication method interaction flowchart is provided by the embodiments of the present application. As shown in the figure, the method comprises: Figure 5

[0210] 501. The terminal device sends an uplink reference signal to the access network device according to a transmission pattern.

[0211] Correspondingly, the access network device receives the uplink reference signal from the terminal device.

[0212] The uplink reference signal resource of the uplink reference signal comprises N ports, and in the transmission pattern, there are at least two groups of ports in the N ports, each group of ports corresponds to the same time-frequency resource, different groups of ports correspond to different time-frequency resources, and the N ports in the transmission pattern are carried in 2 or more OFDM symbols. For example, N is 8, and the 8 ports in the transmission pattern are carried in 2 OFDM symbols. Alternatively, the N ports in the transmission pattern are carried in 2 or more frequency domain combs and 1 OFDM symbol, and the N is an integer greater than 4, for example, N is 8.

[0213] In one possible implementation, step 501 is replaced by: the terminal device sends an uplink reference signal according to a transmission pattern according to configuration information; and the configuration information indicates that the terminal device sends the uplink reference signal according to the transmission pattern. That is, the time-frequency resource mapping mode of the N ports included in the uplink signal resource is the same as the time-frequency resource mapping mode of the N ports in the transmission pattern. ​

[0214] In a possible implementation, N is 8, the N ports in the transmission pattern are carried on 2 frequency domain combs with a frequency domain comb degree of 2 and 2 OFDM symbols, and two ports located on the same frequency domain comb and OFDM symbol correspond to two different CSs; or, the N ports in the transmission pattern are carried on 1 frequency domain comb with a frequency domain comb degree of 2 and 2 OFDM symbols, and four ports located on the same frequency domain comb and OFDM symbol correspond to four different CS values; or, the N ports in the transmission pattern are carried on 2 frequency domain combs with a frequency domain comb degree of 2 and 1 OFDM symbol, and four ports located on the same frequency domain comb and OFDM symbol correspond to four different CS values.

[0215] In this implementation, the N ports in the transmission pattern are carried on a frequency domain comb and an OFDM symbol in such a manner that the orthogonality between the ports is strong.

[0216] 502. The terminal device receives precoding indication information from the access network device.

[0217] Correspondingly, the access network device sends precoding indication information to the terminal device. Optionally, the precoding indication information is obtained by the access network device according to the uplink reference signal. Optionally, the transmission antenna of the uplink data corresponds to each port in the plurality of uplink reference signals.

[0218] The precoding indication information is used to indicate the precoding adopted by the uplink data transmission, the precoding indication information is obtained by the access network device according to the uplink reference signal, and the rows of the matrix corresponding to the precoding correspond to the N ports one by one. For example, the precoding corresponds to an 8-row matrix, the rows of the matrix correspond to the N ports included in the uplink reference signal resource one by one. For example, the precoding corresponds to two 4-row matrices, the rows of the two matrices correspond to the 8 ports included in the uplink reference signal resource one by one. For example, the precoding corresponds to four 2-row matrices, the rows of the four matrices correspond to the 8 ports included in the uplink reference signal resource one by one.

[0219] 503. The terminal device maps the uplink data to the antenna ports according to the precoding.

[0220] Correspondingly, the access network device receives the uplink data from the terminal device.

[0221] In a possible implementation, the uplink reference signal is an SRS, the uplink reference signal resource is an SRS resource, the uplink data is carried in a PUSCH or a PUCCH, the N is 8, the number of the antenna ports is the same as the number of the ports of the SRS resource, and the antenna ports correspond to the ports of the SRS resource one by one. The terminal device can map the uplink data to the antenna ports according to the precoding in the following manner: the terminal device maps the uplink data to the antenna ports according to the precoding by using formula (8); wherein, W in formula (8) represents a matrix corresponding to the precoding, z represents data transmitted on each antenna port, and y is the uplink data.

[0222] In a possible implementation, the transmission power of the uplink reference signal is determined according to the transmission pattern. When the transmission pattern indicates that the N ports are carried on (For example, 2) OFDM symbols, the maximum transmission power of each port does not exceed , wherein, P CMAX is the maximum transmission power configured for the terminal device, is an integer greater than 1, and the is equal to the N. Optionally, the total transmission power of the SRS determined by the existing power control strategy is equally divided among the corresponding SRS ports on each OFDM symbol, so that the actual transmission power of the SRS corresponding to the 8-port SRS resource is times of the total transmission power. In this implementation, the N ports are carried on OFDM symbols, so that the actual transmission power of the SRS corresponding to the SRS resource is times of the total transmission power, and the channel measurement accuracy can be improved.

[0223] In a possible implementation, the 8-port SRS is configured in an SRS resource set used for uplink codebook transmission. The terminal device transmits the 8-port SRS, the access network device determines the channel information of each transmission antenna of the terminal device based on the 8-port SRS, and then indicates a TPMI based on the 8-port SRS. The TPMI is in the form of a matrix, the number of rows of the matrix is 8 (determined according to the number of ports of the corresponding SRS), each SRS port corresponds to a terminal device transmission antenna for transmitting a PUSCH, and the transmission phase of the transmission antenna corresponding to each SRS port is determined according to each row of the TPMI. In this implementation, the transmission phase of the transmission antenna corresponding to each SRS port of the 8-port SRS can be accurately determined.

[0224] In the embodiments of the present application, the terminal device sends the uplink reference signal to the access network device according to the transmission pattern, so that the N (greater than 4) ports included in the uplink reference signal resource of the uplink reference signal are carried in 2 or more OFDM symbols; by carrying the N ports included in the same uplink reference signal resource in 2 or more OFDM symbols, the orthogonality between each port in the N ports can be improved. The terminal device sends the uplink reference signal to the access network device according to the transmission pattern, so that the N (greater than 4) ports included in the uplink reference signal resource of the uplink reference signal are carried in 2 or more frequency domain combs and 1 OFDM symbol, and the precoding indication information indicates that the rows of the matrix corresponding to the precoding used for the uplink data transmission of the terminal device are one-to-one corresponding to the N ports included in the uplink reference signal resource; a scheme for carrying the uplink reference signal using the uplink reference signal resource including the N ports is provided, and the design of the SRS resource in the scenario with a large number of SRS ports is supported.

[0225] The N ports included in the uplink reference signal resource can be carried in frequency domain combs with different comb degrees. The terminal device carries the N ports included in the uplink reference signal resource in frequency domain combs with different comb degrees, and sends the uplink reference signal to the access network device according to different transmission patterns. In the present application, the frequency domain comb degree and the comb degree can be replaced with each other. The signal transmission scheme when the terminal device carries the SRS port in the frequency domain comb with a comb degree of 2, 4 or 8 will be described below.

[0226] Figure 6 Another communication method interaction flowchart provided in the embodiments of the present application. Figure 6 The signal transmission scheme when the terminal device carries the SRS port in the frequency domain comb with a comb degree of 2. Figure 6 The method flow in the above Figure 5 A possible implementation manner of the described method. In this implementation manner, the terminal device can select a transmission pattern from two or more patterns to obtain a transmission pattern suitable for transmitting the uplink reference signal. As Figure 6 indicated, the method comprises:

[0227] 601. The terminal device determines a transmission pattern from two or more patterns according to the CS reference value indication of the uplink reference signal included in the configuration information of the uplink reference signal resource, and the comb degree of the two or more patterns is 2.

[0228] The uplink reference signal resource is an SRS resource, and the uplink reference signal is an SRS. The N ports in the transmission pattern correspond to different time-frequency resources respectively. The N ports in the transmission pattern are carried in 2 or more OFDM symbols. Alternatively, the N ports in the transmission pattern are carried in 2 or more frequency domain combs and 1 OFDM symbol, and N is an integer greater than 4, for example, N is 8. Example 1: The N ports in the transmission pattern are carried in 2 frequency domain combs with a frequency domain comb degree of 2 and 2 OFDM symbols, and two ports located in the same frequency domain comb and OFDM symbol correspond to two different cyclic shift (CS) values. Example 2: The N ports in the transmission pattern are carried in 1 frequency domain comb with a frequency domain comb degree of 2 and 2 OFDM symbols, and four ports located in the same frequency domain comb and OFDM symbol correspond to four different CS values. Example 3: The N ports in the transmission pattern are carried in 2 frequency domain combs with a frequency domain comb degree of 2 and 1 OFDM symbol, and four ports located in the same frequency domain comb and OFDM symbol correspond to four different CS values. It should be understood that when the terminal device carries the SRS ports by using the frequency domain comb with a comb degree of 2, the time-frequency resource mapping mode corresponding to the transmission pattern can be any one of the following: a frequency division mapping mode (corresponding to Example 3): 2 combs + 4 CSs are allocated to 8 ports; a frequency division + time division mapping mode 1 (corresponding to Example 1): 2 combs + 2 OFDM + 2 CSs are allocated to 8 ports; a frequency division + time division mapping mode 2 (corresponding to Example 2): 1 comb + 2 OFDM + 4 CSs are allocated to 8 ports.

[0229] In a possible implementation, the configuration information further includes comb position indication of the uplink reference signal and a frequency domain comb degree K TC (2), the two or more patterns include at least two of a first pattern, a second pattern, and a third pattern;

[0230] The first port set in the N ports in the first pattern (corresponding to Example 1) corresponds to a comb The second port set in the N ports corresponds to a comb The indexes of the OFDM symbols corresponding to two ports in the first port set are l, the indexes of the OFDM symbols corresponding to the other two ports in the first port set are (l+n), the indexes of the OFDM symbols corresponding to two ports in the second port set are l, and the indexes of the OFDM symbols corresponding to the other two ports in the second port set are (l+n), n is an integer greater than or equal to 1, and l is an integer greater than or equal to 0;

[0231] The first port set and the second port set in the first pattern (corresponding to example 1) correspond to the comb teeth of The index of the OFDM symbol corresponding to the first port set is l, the index of the OFDM symbol corresponding to the second port set is (l+n), n is an integer greater than or equal to 1, and l is an integer greater than or equal to 0;

[0232] The first port set in the third pattern (corresponding to example 3) corresponds to the comb teeth of The second port set in the third pattern corresponds to the comb teeth of The index of the OFDM symbol corresponding to the first port set and the second port set is l, and l is an integer greater than or equal to 0;

[0233] The ports included in the first port set and the ports included in the second port set are different.

[0234] In a possible implementation, the first pattern, the second pattern, and the third pattern each include 8 ports, the first port set is {1, 3, 5, 7}, the second port set is {0, 2, 4, 6}, and port 0 to port 7 represent port 1000 to port 1007, that is, port 0 represents port 1000, port 1 represents port 1001, and so on. Figure 7 The first pattern, the second pattern, and the third pattern provided by the embodiments of the present application are exemplified. As shown in FIG. 7, Figure 7 The first port set in the first pattern corresponds to the comb teeth of 1 (that is, ), the index of the OFDM symbol corresponding to port 1 and port 3 is l, the index of the OFDM symbol corresponding to port 5 and port 7 is (l+n), the second port set in the first pattern corresponds to the comb teeth of 0 (that is, ), the index of the OFDM symbol corresponding to port 0 and port 2 is l, and the index of the OFDM symbol corresponding to port 4 and port 6 is (l+n); the first port set and the second port set in the second pattern correspond to the comb teeth of 0 (that is, ), the index of the OFDM symbol corresponding to the first port set is l, and the index of the OFDM symbol corresponding to the second port set is (l+n); the first port set in the third pattern corresponds to the comb teeth of 1 (that is, ), and the second port set in the third pattern corresponds to the comb teeth of 0 (that is, ).

[0235] It should be understood that the port numbers included in each of the above port sets are only an example, and other combinations of port numbers can also be included in different port sets.

[0236] A possible implementation of step 601 is as follows: the terminal device determines the third pattern in the second pattern and the third pattern as the sending pattern when the CS reference value indication (i.e. ) is contained in the first set; determines the second pattern in the second pattern and the third pattern as the sending pattern when the CS reference value indication is contained in the second set; the first set is the second set is The first port set and the second port set in the N ports in the second pattern correspond to the combs The first port set corresponds to the OFDM symbol index l, and the second port set corresponds to the OFDM symbol index (l+n). The first port set in the N ports in the third pattern corresponds to the comb The second port set in the N ports corresponds to the comb , and the first port set and the second port set correspond to the OFDM symbol index l. By switching the sending pattern through the redundant information in the CS reference value indication, the configuration signaling design can be simplified.

[0237] A possible implementation of the above step 601 corresponds to the following formula:

[0238]

[0239]

[0240]

[0241]

[0242]

[0243] wherein p i represents the index of port i, represents the index of the OFDM symbol, l0 and (l0+1) represent the indexes of two different OFDM symbols. Formula (9) represents the third pattern; formula (10) and formula (11) represent the second pattern.

[0244] In an implementation, The value range and the corresponding relationship of the pattern can not be limited to the above examples.

[0245] Another possible implementation of step 601 is as follows: the terminal device determines the third pattern in the second pattern and the third pattern as the sending pattern when the CS reference value indication (i.e. When a pattern is included in the first set, the third pattern from the first and third patterns is selected as the sending pattern; when the CS reference value indicates that a pattern is included in the second set, the first pattern from the first and third patterns is selected as the sending pattern; the first set is... The second set is The comb teeth corresponding to the first port set of the N ports mentioned above in the first pattern. The comb teeth corresponding to the second port set among the above N ports are The OFDM symbol indices corresponding to the two ports in the first port set mentioned above are denoted by l, and the OFDM indices corresponding to the other two ports in the first port set mentioned above are denoted by (l+n). Similarly, the OFDM indices corresponding to the two ports in the second port set mentioned above are denoted by l, and the OFDM symbol indices corresponding to the other two ports in the second port set mentioned above are denoted by (l+n), where n is an integer greater than or equal to 1, and l is an integer greater than or equal to 0. The corresponding formula for this implementation is as follows:

[0246]

[0247]

[0248]

[0249]

[0250]

[0251] Where, p i This represents the index of port i. Indicates the index of the OFDM symbol. Formula (12) represents the third drawing mentioned above; formulas (13) and (14) represent the first drawing mentioned above. In one implementation, The correspondence between the range of values ​​and the pattern is not limited to the example above.

[0252] Step 601 can be replaced by: The terminal device indices the CS reference value of the uplink reference signal according to the configuration information of the uplink reference signal resource. and symbol number The sending pattern is determined from three or more patterns, where the comb tooth degree corresponding to two or more patterns is 2. For example, in... Included in the first set and When the value equals 1, the first pattern, the second pattern, and the third pattern from the third pattern are used as the sending pattern; Included in the first set and When the value is greater than 1, the first pattern, the second pattern, and the second pattern from the third pattern will be used as the sending pattern; is included in the second set and when the CS reference value is greater than 1, the first pattern among the first pattern, the second pattern and the third pattern is taken as the sending pattern.

[0253] 602. The terminal device sends the uplink reference signal to the access network device according to the sending pattern.

[0254] Step 602 can refer to step 501.

[0255] 603. The terminal device receives the precoding indication information from the access network device.

[0256] Step 603 can refer to step 502.

[0257] 604. The terminal device maps the uplink data to the antenna port according to the precoding.

[0258] Step 604 can refer to step 503.

[0259] In the embodiments of the present application, the access network device can flexibly configure the sending pattern based on the channel state of the terminal device. Specifically, when the uplink sending power of the terminal device is limited, the sending pattern occupying multiple OFDM symbols can be configured, and when the base station has a high requirement on the phase accuracy of the terminal device, the sending pattern occupying one OFDM symbol can be configured. In addition, the sending pattern can be switched through the redundant information in the CS reference value indication, which can simplify the configuration signaling design.

[0260] Figure 8 Another communication method interaction flowchart provided by the embodiments of the present application. Figure 8 When the terminal device adopts the frequency domain comb with a comb degree of 4 (i.e. K TC When the terminal device adopts the frequency domain comb with a comb degree of 4 (i.e. K Figure 8 The method flow in the above embodiment is Figure 5 A possible implementation of the method described above. In this implementation, the terminal device can determine the sending pattern from two or more patterns in order to obtain the sending pattern suitable for sending the uplink reference signal. As shown in the following method, the method includes: Figure 8

[0261] 801. The terminal device determines the sending pattern from two or more patterns according to the CS reference value indication of the uplink reference signal included in the configuration information of the uplink reference signal resource, the two or more patterns corresponding to a comb degree of 4.

[0262] ​Step 801 can refer to step 501. In possible way 1, the N ports in the sending pattern are carried on 2 frequency domain combs with a frequency domain comb degree of 4 and 2 OFDM symbols, and two ports located on the same frequency domain comb and OFDM symbol correspond to 2 different CS values. In possible way 2, the N ports in the sending pattern are carried on 1 frequency domain comb with a frequency domain comb degree of 4 and 2 OFDM symbols, and four ports located on the same frequency domain comb and OFDM symbol correspond to 4 different CS values. In possible way 3, the N ports in the sending pattern are carried on 2 frequency domain combs with a frequency domain comb degree of 4 and 1 OFDM symbol, and four ports located on the same frequency domain comb and OFDM symbol correspond to 4 different CS values. In possible way 4, the N ports in the sending pattern are carried on 4 frequency domain combs with a frequency domain comb degree of 4 and 1 OFDM symbol, and two ports located on the same frequency domain comb and OFDM symbol correspond to 2 different CS values. The time-frequency resource mapping mode corresponding to the sending pattern can be any one of the following: frequency division mapping mode 1: 2 combs+4 CS (way 3); frequency division mapping mode 2: 4 combs+2 CS (way 4); frequency division+time-frequency mapping mode 1: 2 combs+2 OFDM symbols+2 CS (way 1); frequency division+time-frequency mapping mode 2: 2 OFDM symbols+4 CS (way 2).

[0263] In a possible implementation, the configuration information further includes comb position indication and frequency domain comb degree K TC The two or more patterns include at least two of a first pattern, a second pattern, a third pattern, and a fourth pattern.

[0264] The first port set in the N ports in the first pattern (corresponding to way 1) corresponds to a comb The second port set in the N ports corresponds to a comb The indexes of the OFDM symbols corresponding to two ports in the first port set are l, and the indexes of the OFDM symbols corresponding to the other two ports in the first port set are (l+n), the indexes of the OFDM symbols corresponding to two ports in the second port set are l, and the indexes of the OFDM symbols corresponding to the other two ports in the second port set are (l+n), where n is an integer greater than or equal to 1, and l is an integer greater than or equal to 0.

[0265] The combs corresponding to the first port set and the second port set in the N ports in the second pattern (corresponding to way 2) are The index of the OFDM symbol corresponding to the first port set in the first pattern is l, the index of the OFDM symbol corresponding to the second port set in the first pattern is (l+n), and l and n are integers greater than or equal to 1.

[0266] The comb corresponding to the first port set in the third pattern (corresponding to mode 3) is The comb corresponding to the second port set in the third pattern is The index of the OFDM symbol corresponding to the first port set and the second port set in the third pattern is l, and l is an integer greater than or equal to 1.

[0267] The combs corresponding to the four port sets in the fourth pattern (corresponding to mode 4) are The index of the OFDM symbol corresponding to the four port sets in the fourth pattern is l, and l is an integer greater than or equal to 1.

[0268] The ports included in the first port set are different from the ports included in the second port set.

[0269] In a possible implementation, the first pattern, the second pattern, the third pattern, and the fourth pattern each include 8 ports, the first port set is {1, 3, 5, 7}, the second port set is {0, 2, 4, 6}, the four port sets included in the fourth pattern are {0, 4}, {2, 6}, {1, 5}, and {3, 7} respectively, and port 0 to port 7 represent port 1000 to port 1007, that is, port 0 represents port 1000, port 1 represents port 1001, and so on. Figure 9 The first pattern, the second pattern, the third pattern, and the fourth pattern provided by the embodiments of the present application are examples. As shown in FIG. 9, Figure 9 The comb corresponding to the first port set in the first pattern is 2 (that is, ), the index of the OFDM symbol corresponding to port 1 and port 3 is l, the index of the OFDM symbol corresponding to port 5 and port 7 is (l+n), the comb corresponding to the second port set in the first pattern is 0 (that is, ), the index of the OFDM symbol corresponding to port 0 and port 2 is l, and the index of the OFDM symbol corresponding to port 4 and port 6 is (l+n); the comb corresponding to the first port set and the second port set in the second pattern is 0 (that is, ), the index of the OFDM symbol corresponding to the first port set is l, and the index of the OFDM symbol corresponding to the second port set is (l+n); the comb corresponding to the first port set in the third pattern is 2 (that is, ), the comb corresponding to the second port set in the third pattern is 0 (i.e. ), the index of the OFDM symbol corresponding to the first port set and the second port set is l; the combs corresponding to the four port sets in the first pattern are 0 (i.e. ), 1 (i.e. ), 2 (i.e. ), and 3 (i.e. ), respectively. The index of the OFDM symbol corresponding to the four port sets is l. It should be understood that the port numbers included in each of the above port sets are only an example, and other combinations of port numbers can also be included in different port sets.

[0270] A possible implementation of step 801 is as follows: when the CS reference value indication (i.e. ) is contained in the first set, the terminal device takes the third pattern in the second pattern and the third pattern as the transmission pattern; when the CS reference value indication is contained in the second set, the terminal device takes the second pattern in the second pattern and the third pattern as the transmission pattern; the first set is The second set is By switching the transmission pattern through the redundant information in the CS reference value indication, the configuration signaling design can be simplified.

[0271] Another possible implementation of step 801 is as follows: when the CS reference value indication (i.e. ) is contained in the first set, the terminal device takes the third pattern in the first pattern and the third pattern as the transmission pattern; when the CS reference value indication is contained in the second set, the terminal device takes the first pattern in the first pattern and the third pattern as the transmission pattern; the first set is The second set is By switching the transmission pattern through the redundant information in the CS reference value indication, the configuration signaling design can be simplified.

[0272] Another possible implementation of step 801 is as follows: when the CS reference value indication (i.e. ) is contained in the first set, the terminal device takes the first pattern in the first pattern and the second pattern as the transmission pattern; when the CS reference value indication is contained in the second set, the terminal device takes the second pattern in the first pattern and the second pattern as the transmission pattern; the first set is The second set is By switching the transmission pattern through the redundant information in the CS reference value indication, the configuration signaling design can be simplified.

[0273] Another possible implementation of step 801 is as follows: when the CS reference value indication (i.e. When the CS reference value is included in the first set, the third pattern from the third and fourth patterns is used as the transmission pattern; when the CS reference value is included in the second set, the fourth pattern from the third and fourth patterns is used as the transmission pattern; the first set is... The second set is Switching transmission patterns using redundant information in the CS reference value indication can simplify the configuration signaling design.

[0274] Another possible implementation of step 801 is as follows: The terminal device indicates the CS reference value (i.e. When the CS reference value is included in the first set, the first pattern from the first and fourth patterns is used as the transmission pattern; when the CS reference value indicates that the CS is included in the second set, the fourth pattern from the first and fourth patterns is used as the transmission pattern; the first set is... The second set is Switching transmission patterns using redundant information in the CS reference value indication can simplify the configuration signaling design.

[0275] Another possible implementation of step 801 is as follows: The terminal device indicates the CS reference value (i.e. When the pattern is included in the first set, the second pattern from the second and fourth patterns is used as the transmission pattern; when the CS reference value indicates that the pattern is included in the second set, the fourth pattern from the second and fourth patterns is used as the transmission pattern; the first set is... The second set is Switching transmission patterns using redundant information in the CS reference value indication can simplify the configuration signaling design.

[0276] One possible implementation of step 801 is as follows: The terminal device uses the CS reference value indication and maximum CS indication included in the configuration information of the uplink reference signal resources. and symbolic number The transmission pattern is determined from two or more patterns; the two or more patterns include at least two of the first pattern, second pattern, third pattern, and fourth pattern, and the symbol number indicates the number of OFDM symbols carrying the N ports. For example, the terminal device determines the transmission pattern from the first pattern, second pattern, third pattern, and fourth pattern based on the CS reference value indication, maximum CS indication, and symbol number included in the uplink reference signal resource configuration information. The formula corresponding to this implementation is as follows:

[0277] (Frequency Division Mode)

[0278]

[0279]

[0280]

[0281]

[0282]

[0283]

[0284]

[0285]

[0286]

[0287] wherein, p i denotes the index of port i, denotes the index of OFDM symbol. Formula (15) denotes the third pattern; formula (16) denotes the fourth pattern; formula (17) and formula (18) denote the first pattern; formula (19) and formula (20) denote the second pattern. The transmission pattern can be sent by switching the redundant information in the CS reference value indication, which can simplify the configuration signaling design. In an implementation manner, The correspondence between the value range and the pattern can not be limited to the above examples.

[0288] 802. The terminal device sends the uplink reference signal to the access network device according to the transmission pattern.

[0289] The step 802 can refer to the step 501.

[0290] 803. The terminal device receives the precoding indication information from the access network device.

[0291] The step 803 can refer to the step 502.

[0292] 804. The terminal device maps the uplink data to the antenna port according to the precoding.

[0293] The step 804 can refer to the step 503.

[0294] In the embodiments of the present application, the access network device can flexibly configure the transmission pattern based on the channel state of the terminal device. Specifically, when the uplink transmission power of the terminal device is limited, the transmission pattern occupying multiple OFDM symbols can be configured, and when the base station has a high requirement on the phase accuracy of the terminal device, the transmission pattern occupying one OFDM symbol can be configured.

[0295] Figure 10 Another communication method interaction flowchart is provided for the embodiments of the present application. Figure 10 The terminal device adopts a comb degree of 8 (i.e., KTC is a signal sending scheme when the N ports in the sending pattern are carried by 2 comb of 8 in frequency domain. Figure 10 The method flow in the method is Figure 5 A possible implementation of the method is described. In this implementation, the terminal device can select a sending pattern from two or more patterns in order to obtain a sending pattern suitable for sending an uplink reference signal. As shown in Figure 10 The method includes:

[0296] 1001. The terminal device determines a sending pattern from two or more patterns according to a CS reference value indication of an uplink reference signal included in the configuration information of the uplink reference signal resource, the two or more patterns corresponding to a comb degree of 8.

[0297] Step 1001 can refer to step 501. In a possible way 5, the N ports in the sending pattern are carried by 2 combs of 8 in frequency domain and 2 OFDM symbols, and two ports located in the same comb and OFDM symbol correspond to two different CS values. In a possible way 6, the N ports in the sending pattern are carried by 1 comb of 8 in frequency domain and 2 OFDM symbols, and four ports located in the same comb and OFDM symbol correspond to four different CS values. In a possible way 7, the N ports in the sending pattern are carried by 2 combs of 8 in frequency domain and 1 OFDM symbol, and four ports located in the same comb and OFDM symbol correspond to four different CS values. In a possible way 8, the N ports in the sending pattern are carried by 4 combs of 8 in frequency domain and 1 OFDM symbol, and two ports located in the same comb and OFDM symbol correspond to two different CS values. The time-frequency resource mapping mode corresponding to the sending pattern can be any of the following: frequency division mapping mode 1: 2 combs + 4 CS (way 7); frequency division mapping mode 2: 4 combs + 2 CS (way 8); frequency division + time-frequency mapping mode 1: 2 combs + 2 OFDM symbols + 2 CS (way 5); frequency division + time-frequency mapping mode 2: 2 OFDM symbols + 4 CS (way 6).

[0298] In a possible implementation, the configuration information further includes a comb position indication and a frequency domain comb degree K TC The two or more patterns include at least two of a first pattern, a second pattern, a third pattern, and a fourth pattern.

[0299] The first port set in the N ports in the first pattern (corresponding to way 5) corresponds to a comb of The comb teeth corresponding to the second port set in the N ports are The indexes of the OFDM symbols corresponding to the two ports in the first port set are l, the indexes of the OFDM symbols corresponding to the other two ports in the first port set are (l+n), the indexes of the OFDM symbols corresponding to the two ports in the second port set are l, and the indexes of the OFDM symbols corresponding to the other two ports in the second port set are (l+n), where n is an integer greater than or equal to 1, and l is an integer greater than or equal to 0.

[0300] The comb teeth corresponding to the first port set and the second port set in the N ports in the second pattern (corresponding to mode 6) are The indexes of the OFDM symbols corresponding to the first port set are l, and the indexes of the OFDM symbols corresponding to the second port set are (l+n), where l and n are integers greater than or equal to 1.

[0301] The comb teeth corresponding to the first port set in the N ports in the third pattern (corresponding to mode 7) are The comb teeth corresponding to the second port set in the N ports are The indexes of the OFDM symbols corresponding to the first port set and the second port set are l, where l is an integer greater than or equal to 1.

[0302] The comb teeth corresponding to the four port sets in the N ports in the fourth pattern (corresponding to mode 8) are The indexes of the OFDM symbols corresponding to the four port sets are l, where l is an integer greater than or equal to 1.

[0303] The ports included in the first port set are different from the ports included in the second port set.

[0304] In a possible implementation, the first pattern, the second pattern, the third pattern, and the fourth pattern each include 8 ports, the first port set is {1, 3, 5, 7}, the second port set is {0, 2, 4, 6}, the third port set is {0, 1, 3, 4}, and the second port set is {2, 3, 5, 6}, the four port sets included in the fourth pattern are {0, 4}, {2, 6}, {1, 5}, and {3, 7} respectively, and ports 0 to 7 represent ports 1000 to 1007, that is, port 0 represents port 1000, port 1 represents port 1001, and so on. Figure 11 Examples of the first pattern, the second pattern, the third pattern, and the fourth pattern provided by the embodiments of the present application are as follows. Figure 11As shown, 1101 represents a first pattern, 1102 represents a second pattern, 1103 represents a third pattern, and 1104 represents a fourth pattern. Rectangular boxes with different textures belong to different combs; the combs corresponding to the first port set in the first pattern are 4 (i.e. ), the indexes of the OFDM symbols corresponding to port 1 and port 3 are l, the indexes of the OFDM symbols corresponding to port 5 and port 7 are (l+n), the combs corresponding to the second port set in the first pattern are 0 (i.e. ), the indexes of the OFDM symbols corresponding to port 0 and port 2 are l, the indexes of the OFDM symbols corresponding to port 4 and port 6 are (l+n); the combs corresponding to the first port set and the second port set in the second pattern are 0 (i.e. ), the indexes of the OFDM symbols corresponding to the first port set are l, and the indexes of the OFDM symbols corresponding to the second port set are (l+n); the comb corresponding to the fourth port set in the third pattern is 2 (i.e. The comb corresponding to the third port set in the third pattern is 0 (i.e. ), the indexes of the OFDM symbols corresponding to the third port set and the fourth port set are l; the combs corresponding to the four port sets in the fourth pattern are 0 (i.e. ), 2 (i.e. ), 4 (i.e. ), and 6 (i.e. ), respectively, and the indexes of the OFDM symbols corresponding to the four port sets are l. It should be understood that the port numbers included in each of the above port sets are only an example, and other combinations of port numbers can also be included in different port sets.

[0305] One possible implementation of step 1001 is as follows: when the CS reference value indication (i.e. ) is contained in a first set, the terminal device takes the third pattern in the first pattern and the fourth pattern as the transmission pattern; when the CS reference value indication is contained in a second set, the terminal device takes the first pattern in the first pattern and the fourth pattern as the transmission pattern; the first set is The second set is Switching the transmission pattern through the redundant information in the CS reference value indication can simplify the configuration signaling design.

[0306] Another possible implementation of step 1001 is as follows: when the CS reference value indication (i.e. ) is contained in a first set, the terminal device takes the third pattern in the second pattern and the third pattern as the transmission pattern; when the CS reference value indication is contained in a second set, the terminal device takes the second pattern in the second pattern and the third pattern as the transmission pattern; the first set is The second set is The sending pattern can be switched by the redundant information in the CS reference value indication, and the configuration signaling design can be simplified.

[0307] In a possible implementation of step 1001, the terminal device takes the first pattern in the first pattern and the second pattern as the sending pattern when the CS reference value indication is included in a first set, and takes the second pattern in the first pattern and the second pattern as the sending pattern when the CS reference value indication is included in a second set. The first set is The second set is The corresponding formula of the possible implementation is as follows:

[0308]

[0309]

[0310]

[0311]

[0312]

[0313] wherein p i represents the index of the port i, represents the index of the OFDM symbol. The formula (21) represents the fourth pattern, and the formula (22) and the formula (23) represent the first pattern. In an implementation, the value range and the corresponding relationship of the pattern can not be limited to the above examples.

[0314] In a possible implementation of step 1001, the terminal device takes the third pattern in the third pattern and the fourth pattern as the sending pattern when the CS reference value indication is included in a first set, and takes the fourth pattern in the third pattern and the fourth pattern as the sending pattern when the CS reference value indication is included in a second set. The first set is The second set is The sending pattern can be switched by the redundant information in the CS reference value indication, and the configuration signaling design can be simplified.

[0315] In a possible implementation of step 1001, the terminal device takes the first pattern in the first pattern and the third pattern as the sending pattern when the CS reference value indication is included in a first set, and takes the third pattern in the first pattern and the third pattern as the sending pattern when the CS reference value indication is included in a second set. The first set is ​Switching transmission patterns using redundant information in the CS reference value indication can simplify the configuration signaling design.

[0316] Another possible implementation of step 1001 is as follows: The terminal device indicates the CS reference value (i.e. When the pattern is included in the first set, the second pattern from the second and fourth patterns is used as the transmission pattern; when the CS reference value indicates that the pattern is included in the second set, the fourth pattern from the second and fourth patterns is used as the transmission pattern; the first set is... The second set is Switching transmission patterns using redundant information in the CS reference value indication can simplify the configuration signaling design.

[0317] One possible implementation of step 1001 is as follows: The terminal device uses the CS reference value indication and maximum CS indication included in the configuration information of the uplink reference signal resources. and symbolic number The transmission pattern is determined from two or more patterns; the two or more patterns include at least two of the first pattern, second pattern, third pattern, and fourth pattern, and the symbol number indicates the number of OFDM symbols carrying the N ports. For example, the terminal device determines the transmission pattern from the first pattern, second pattern, third pattern, and fourth pattern based on the CS reference value indication, maximum CS indication, and symbol number included in the uplink reference signal resource configuration information. The formula corresponding to this implementation is as follows:

[0318]

[0319]

[0320]

[0321]

[0322]

[0323]

[0324]

[0325]

[0326]

[0327]

[0328] Where, p i This represents the index of port i. indicates the fourth pattern described above; formula (25) indicates the third pattern described above; formula (26) and formula (27) indicate the first pattern described above; formula (28) and formula (29) indicate the second pattern described above. The transmission pattern can be switched by the redundant information in the CS reference value indication, which can simplify the configuration signaling design. In an implementation, the value range and the corresponding pattern can be as follows. The value range and the corresponding pattern can not be limited to the above examples. In this application, several first patterns, second patterns, third patterns and fourth patterns corresponding to different comb degrees are provided. Figure 6 The first pattern, the second pattern and the third pattern involved in the method flow of the first aspect of the application correspond to a comb degree of 2. Figure 8 The first pattern, the second pattern, the third pattern and the fourth pattern involved in the method flow of the second aspect of the application correspond to a comb degree of 4. Figure 10 The first pattern, the second pattern, the third pattern and the fourth pattern involved in the method flow of the third aspect of the application correspond to a comb degree of 8.

[0329] 1002. The terminal device transmits an uplink reference signal to the access network device according to the transmission pattern.

[0330] Step 1002 can refer to step 501.

[0331] 1003. The terminal device receives precoding indication information from the access network device.

[0332] Step 1003 can refer to step 502.

[0333] 1004. The terminal device maps uplink data to an antenna port according to the precoding.

[0334] Step 1004 can refer to step 503.

[0335] In the embodiments of the application, the access network device can flexibly configure the transmission pattern based on the channel state of the terminal device. Specifically, when the uplink transmission power of the terminal device is limited, a transmission pattern occupying multiple OFDM symbols can be configured, and when the base station has a high requirement for the phase accuracy of the terminal device, a transmission pattern occupying one OFDM symbol can be configured.

[0336] Figure 12 Another communication method interaction flowchart provided by the embodiments of the application. Figure 12 The method flow in the first aspect of the application is Figure 5 A possible implementation of the method described above. In this implementation, the access network device determines the channel information of each transmission antenna of the terminal device based on the 8-port SRS, and then indicates the TPMI based on the 8-port SRS. As shown in Figure 12 The method includes:

[0337] 1201、The terminal device sends an uplink reference signal to the access network device according to a sending pattern.

[0338] Correspondingly, the access network device receives the uplink reference signal from the terminal device. Step 1201 can refer to step 501. The uplink reference signal is an 8-port SRS. The 8-port SRS is configured in an SRS resource set for uplink codebook transmission. The uplink reference signal resource of the uplink reference signal includes 8 ports.

[0339] 1202、The access network device determines the channel information of each sending antenna of the terminal device according to the uplink reference signal.

[0340] Each sending antenna of the terminal device corresponds to the 8 ports included in the uplink reference signal resource.

[0341] 1203、The access network device sends precoding indication information to the terminal device according to the determined channel information of each sending antenna of the terminal device.

[0342] The precoding indication information indicates the precoding used for uplink data transmission. The corresponding matrix (which can be referred to as a precoding matrix) of the precoding has one-to-one correspondence with each SRS port of the uplink reference signal. The sending antenna of the terminal device corresponding to the SRS port is used to send PUSCH, and the sending phase of the sending antenna corresponding to each SRS port is determined according to each row of the matrix. Alternatively, the precoding indication information includes a TPMI. The TPMI is in the form of a matrix, the number of rows of the matrix is 8 (determined according to the number of ports of the corresponding SRS), each row of the TPMI corresponds to each SRS port, the sending antenna of the terminal device corresponding to the SRS port is used to send PUSCH, and the sending phase of the sending antenna corresponding to each SRS port is determined according to each row of the TPMI.

[0343] 1204、The terminal device determines the sending phase of the sending antenna corresponding to each SRS port according to the precoding indication information.

[0344] 1205、The terminal device maps the uplink data to the antenna port according to the precoding.

[0345] Correspondingly, the access network device receives the uplink data from the terminal device. In this application, the sending antenna and the antenna port can be replaced with each other.

[0346] In the embodiments of the present application, the access network device determines the channel information of each sending antenna of the terminal device according to the uplink reference signal; the channel information of the sending antenna corresponding to the 8 SRS ports can be determined, and the corresponding precoding indication information is sent, so the signaling overhead is small.

[0347] The communication scheme provided in the present application can make the orthogonality between the ports stronger and / or make the transmission power of each port larger. The following introduces a communication scheme provided in the present application to support a time-frequency mapping scheme of an 8-port SRS resource, which can make the orthogonality between the ports reach the orthogonality level of the existing 2-port SRS resource and 4-port SRS resource.

[0348] Figure 13 Another communication method interaction flowchart provided in an embodiment of the present application is shown in FIG. 13. As shown in FIG. 13, the method comprises the following steps. Figure 13

[0349] 1301. The terminal device transmits a plurality of uplink reference signals according to configuration information of the plurality of uplink reference signal resources.

[0350] Correspondingly, the access network device receives the plurality of uplink reference signals from the terminal device.

[0351] 1302. The access network device generates precoding and transmission layer number indication information according to the plurality of uplink reference signals.

[0352] The precoding and transmission layer number indication information is used to indicate the precoding and transmission layer number adopted by the uplink data transmission, and the precoding and transmission layer number indication information corresponds to the plurality of uplink reference signals; wherein the transmission layer number is less than or equal to the total number of ports included in the plurality of uplink reference signals, the number of rows of the matrix corresponding to the precoding is the total number of ports included in the plurality of uplink reference signals, and the rows of the matrix correspond to each port included in the plurality of uplink reference signals one by one. The precoding and transmission layer number indication information can be referred to as precoding indication information. The precoding and transmission layer number indication information can include a TPMI, which is used to indicate the transmission phase of the transmission antenna corresponding to the PUSCH.

[0353] Optionally, the purpose of the plurality of uplink reference signals is configured for codebook-based uplink transmission.

[0354] Optionally, the precoding and transmission layer number indication information is obtained by the access network device according to the uplink reference signals.

[0355] Optionally, the transmission antenna of the uplink data transmission corresponds to each port in the plurality of uplink reference signals.

[0356] Optionally, the precoding and transmission layer number indication information includes a plurality of first indication information, and the plurality of first indication information corresponds to the plurality of uplink reference signal resources one by one.

[0357] Optionally, the transmission layer number of the uplink data is the sum of the transmission layer numbers indicated in the plurality of first indication information. ​

[0358] In the embodiments of the present application, the uplink reference signal corresponding to the codebook-based uplink data transmission is carried on multiple uplink reference signal resources. In this way, flexible resource configuration of the uplink reference signal, and corresponding precoding indication and transmission layer indication can be supported.

[0359] The time-frequency mapping scheme of the 8-port SRS resource provided in the present application supports 8-port SRS transmission by supporting multiple SRS resource aggregation. Since the time-frequency resource position of each SRS resource can be independently configured, the 8-port SRS can be split and transmitted on multiple OFDM symbols, supporting the improvement of the transmission power of the SRS, and further improving the channel measurement accuracy. In addition, this method can utilize the design of the 2-port SRS and 4-port SRS resources supported by the existing protocol, and maximize the reuse of the design of the existing TPMI codebook. In the present application, a simplified 8-port SRS design is that the SRI can indicate multiple SRS resources, the number of rows of the TPMI is the sum of all port numbers included in the indicated multiple SRS resources, and the F ports included in each SRS resource correspond to the consecutive F rows in the TPMI, and correspond to the rows of the TPMI from small to large according to the SRS resource index from small to large. In this way, the design of the existing 2-port and 4-port SRS resources can be reused.

[0360] Two possible configuration methods of the 8-port SRS resource are introduced below.

[0361] Configuration method 1: Four 2-port SRS resources are configured. Figure 14 A schematic diagram of an antenna architecture provided in the embodiments of the present application is shown. Figure 14 In the present application, SRS resource 1, SRS resource 2, SRS resource 3, and SRS resource 4 are all 2-port SRS resources.

[0362] In a possible implementation manner, each group of dual-polarized antennas of the terminal device corresponds to a 2-port SRS resource.

[0363] In a possible implementation manner, the four groups of dual-polarized antennas of the terminal device can be respectively subjected to coherent transmission, and coherent transmission cannot be performed between the four groups of antennas. The terminal device can determine the stream-to-port mapping of each SRS resource based on formula (8), and each SRS resource corresponds to an independent layer mapping.

[0364] In a possible implementation manner, the terminal device receives the SRI sent by the base station, and the SRI is used to indicate to select part or all of the SRS resources configured by the base station. The above four SRS resources are indicated by the SRI.

[0365] In a possible implementation, each 2-port SRS resource corresponds to one precoding indication, and the DCI scheduling the uplink data transmission includes four precoding and transmission layer indication information fields, the precoding indication in each field corresponds to the precoding reference table 2 and table 3. Table 2 shows the precoding matrix corresponding to 2-port SRS, 1-layer PUSCH transmission. Table 2 shows the precoding matrix corresponding to 2-port SRS, 2-layer PUSCH transmission. The transmission layer of the uplink data transmission is the sum of the transmission layers indicated by the four fields.

[0366] Table 2

[0367]

[0368] Table 3

[0369]

[0370] Configuration mode 2: 1 4-port SRS resource and 2 2-port SRS resources are configured. Figure 15 A schematic diagram of an antenna architecture provided for an embodiment of the present application. Figure 15 In the above, SRS resource 1 is a 4-port SRS resource, and SRS resource 2 and SRS resource 3 are 2-port SRS resources.

[0371] In a possible implementation, the two groups of dual-polarized antennas corresponding to the 2-port SRS resource of the terminal device can be respectively used for coherent transmission, and the two groups of dual-polarized antennas corresponding to the 4-port SRS resource can be used for coherent transmission. The terminal device can determine the layer-to-port mapping of each SRS resource based on formula (8), and each SRS resource corresponds to an independent layer mapping.

[0372] In a possible implementation, the terminal device receives the SRI sent by the base station, and the SRI is used to indicate to select part or all of the SRS resources from the plurality of SRS resources configured by the base station. The above three SRS resources are indicated by the SRI.

[0373] In a possible implementation, each SRS resource corresponds to one precoding indication, 3 precoding and transmission layer indication information fields are included in the DCI scheduling uplink data transmission, for 2-port SRS resource, the precoding indication in each field corresponds to the precoding reference table 2 and table 3, for 4-port SRS resource, the precoding indication in each field corresponds to the precoding reference table 4 to table 8. The transmission layer number of uplink data transmission is the sum of the transmission layer numbers indicated by the 3 fields. Table 4 shows the precoding matrix corresponding to 4-port SRS, 1-layer PUSCH transmission. Table 5 shows the precoding matrix corresponding to 4-port SRS, 1-layer PUSCH transmission. Table 6 shows the precoding matrix corresponding to 4-port SRS, 2-layer PUSCH transmission. Table 7 shows the precoding matrix corresponding to 4-port SRS, 3-layer PUSCH transmission. Table 8 shows the precoding matrix corresponding to 4-port SRS, 4-layer PUSCH transmission.

[0374] Table 4

[0375]

[0376] Table 5

[0377]

[0378] Table 6

[0379]

[0380] Table 7

[0381]

[0382] Table 8

[0383]

[0384] The transmitting antenna of the terminal device described above can also be single polarization.

[0385] Configuration mode 3: 2 4-port SRS resources are configured. Figure 16 Another schematic diagram of an antenna architecture provided by the embodiments of the present application. Figure 16 In the above, SRS resource 1 and SRS resource 2 are both 4-port SRS resources.

[0386] In a possible implementation, each two groups of dual-polarized antennas of the terminal device correspond to one 4-port SRS resource, and coherent transmission cannot be performed between the two groups of dual-polarized antennas and the other two groups of dual-polarized antennas of the terminal device. The terminal device can determine the stream-to-port mapping of the SRS resource based on formula (8), and each SRS resource corresponds to independent streams and stream mapping.

[0387] In a possible implementation, the terminal device receives an SRI sent by the base station, and the SRI is used to indicate selection of part or all SRS resources from a plurality of SRS resources configured by the base station, and the two SRS resources are indicated by the SRI.

[0388] In a possible implementation, each SRS resource corresponds to one precoding indication, and a DCI scheduling uplink data transmission includes two precoding and transmission layer indication information fields, and the precoding indication in each field corresponds to a precoding reference table 3-6. The transmission layer number of the uplink data transmission is the sum of the transmission layer numbers indicated by the two fields.

[0389] In another possible implementation, each group of polarized antennas of the terminal device corresponds to one 4-port SRS resource, that is, different SRS resources correspond to different polarization directions. The 8 transmitting antennas of the terminal device have coherent transmission capability, that is, the terminal device has full coherent transmission capability.

[0390] In a possible implementation, the precoding is a full-coherent code word. The full-coherent code word means that for each layer (each column of the precoding matrix), the matrix elements corresponding to the 8 ports are all non-zero. In a possible implementation, the plurality of uplink reference signals are a plurality of SRSs, the plurality of uplink reference signal resources are a plurality of SRS resources, the plurality of uplink reference signal resources include two first SRS resources, and the number of ports included in the first SRS resource is 4. For example, the two first SRS resources include SRS resource 1 and SRS resource 2, the antenna ports corresponding to the ports of the SRS resource 1 are in a first polarization direction, and the antenna ports corresponding to the ports of the SRS resource 2 are in a second polarization direction; or for an i-th stream of the uplink data transmission, the precoding corresponding to the ports of the SRS resource 1 is v i , and the precoding corresponding to the ports of the SRS resource 2 is v n is an integer; wherein the number of elements in v i is 4, and i is an integer.

[0391] In a possible design, v i may take one column of the precoding matrix in Table 4 to Table 8.

[0392] In a possible design, v i is a DFT vector with 4 elements.

[0393] In the present application, the antennas in one polarization direction are mapped on the same SRS resource, which can ensure that the transmission beams between the two polarization directions remain consistent, and only the phase rotation between the polarization directions needs to be indicated, thereby reducing the overhead of indicating the precoding.

[0394] In a possible implementation, the multiple uplink reference signals are multiple SRSs, the multiple uplink reference signal resources are multiple SRS resources, the multiple uplink reference signal resources include two second SRS resources and one first SRS resource, the first SRS resource includes 4 ports, and the second SRS resource includes 2 ports. Alternatively, the multiple uplink reference signal resources include four second SRS resources, and the second SRS resource includes 2 ports. The precoding is a partially coherent code word, the uplink reference signal resource is an SRS resource, the kth SRS resource in the multiple SRS resources corresponds to the mth layer of the uplink data, and the row in which a non-zero element in the mth column of the precoding matrix is located corresponds to a port of the kth SRS resource, where m is a positive integer less than or equal to the number of ports of the kth SRS resource, and k is an integer greater than 0. The kth column of the precoding matrix corresponds to the kth SRS resource. The row in which a non-zero element in the mth column of the precoding matrix is located corresponds to a port of the kth SRS resource, where m is a positive integer less than or equal to the number of ports of the kth SRS resource, and k is an integer greater than 0. k The kth SRS resource in the multiple SRS resources corresponds to the mth layer of the uplink data, and the row in which a non-zero element in the mth column of the precoding matrix is located corresponds to a port of the kth SRS resource, where m is a positive integer less than or equal to the number of ports of the kth SRS resource, and k is an integer greater than 0. Partially coherent means that, for each layer (each column of the precoding matrix), only part of the elements in the corresponding matrix is non-zero. That is, each layer of the uplink data corresponds to only one SRS resource in the multiple SRS resources.

[0395] In the present application, the antennas that can be coherently transmitted are mapped on the same SRS resource, which can ensure the accuracy of the base station in measuring the channel of the coherent antenna.

[0396] In a possible implementation, the precoding and transmission layer number indication information includes multiple transmission indication fields, the multiple transmission indication fields correspond to the multiple uplink reference signal resources one by one, and the row of the precoding matrix in the multiple transmission indication fields corresponds to the port in the corresponding uplink reference signal resource one by one. The number of transmission layers of the uplink data is the sum of the numbers of transmission layers indicated by the multiple transmission indication fields. In this implementation, the row of the precoding matrix in the multiple transmission indication fields corresponds to the port in the corresponding uplink reference signal resource one by one, and the terminal device can obtain the related information of the multiple SRS resources used for transmitting the uplink data through the PUSCH or the PUCCH according to the precoding and transmission layer number indication information, and the signaling overhead is small.

[0397] 1303. The access network device sends the precoding and transmission layer number indication information to the terminal device.

[0398] Correspondingly, the terminal device receives the precoding and transmission layer number indication information.

[0399] 1304、The terminal device determines the phase of each transmitting antenna and the number of transmission streams for transmitting uplink data through the PUSCH according to the precoding and the number-of-transmission-layer indication information.

[0400] 1305、The terminal device maps the uplink data to the antenna port according to the precoding.

[0401] Correspondingly, the access network device receives the uplink data from the terminal device.

[0402] In the embodiments of the present application, the access network device sends the precoding and the number-of-transmission-layer indication information to the terminal device, which corresponds to multiple uplink reference signals, and does not need to send a precoding and a number-of-transmission-layer indication information for each uplink reference signal, thereby reducing the signaling overhead. In addition, the 8-port SRS transmission is supported by supporting multiple SRS resource aggregation, the 8-port SRS can be split and transmitted on multiple OFDM symbols, the SRS transmission power is improved, and the channel measurement accuracy is further improved.

[0403] Figure 17 A structural diagram of a communication apparatus 1700 is shown. The communication apparatus 1700 can correspond to implement the functions or steps of the terminal device in the above-mentioned various method embodiments, or implement the functions or steps of the access network device in the above-mentioned various method embodiments. The communication apparatus can include a processing module 1710 and a transceiver module 1720. Optionally, it can also include a storage unit, which can be used to store instructions (codes or programs) and / or data. The processing module 1710 and the transceiver module 1720 can be coupled with the storage unit, for example, the processing module 1710 can read the instructions (codes or programs) and / or data in the storage unit to implement the corresponding method. The above-mentioned various units can be independently arranged, or partially or entirely integrated. For example, the transceiver module 1720 can include a transmitting module and a receiving module.

[0404] In some possible implementation manners, the communication apparatus 1700 can correspond to implement the operations and functions of the terminal device in the above-mentioned method embodiments. For example, the communication apparatus 1700 can be the terminal device, or a component (for example, a chip or a circuit) applied to the terminal device. The transceiver module 1720 can be used to perform, for example, all receiving or transmitting operations performed by the terminal device in the embodiments of the above-mentioned method embodiments, for example, the steps 501, 502 and 503 in the embodiments shown in Figure 5 、 Figure 6 、 Figure 8 、 Figure 10 、 Figure 12 Figure 5 the embodiments shown in Figure 6 the embodiments shown in Figure 8 ​Step 802, step 803, step 804 in the illustrated embodiment, Figure 10 Step 1002, step 1003, step 1004 in the illustrated embodiment, Figure 12 Step 1201, step 1203, step 1205 in the illustrated embodiment, and / or other procedures for supporting the techniques described herein. The processing module 1710 is configured to perform all the operations of the terminal device performed in addition to the transceiving operations in embodiments of Figure 5 , Figure 6 , Figure 8 , Figure 10 , Figure 12 Figure 5 Step 501, step 503 in the illustrated embodiment, Figure 6 Step 601 in the illustrated embodiment, Figure 8 Step 801 in the illustrated embodiment, Figure 10 Step 1001 in the illustrated embodiment, Figure 12 Step 1204 in the illustrated embodiment.

[0405] In some possible implementation, the communication apparatus 1700 can correspond to implement operations and functions of the access network device in the above-mentioned method embodiments. For example, the communication apparatus 1700 can be the access network device, or can be a component (for example, a chip or circuit) applied to the access network device. The transceiver module 1720 can be configured to perform all the receiving or sending operations of the terminal device performed in embodiments of Figure 5 , Figure 6 , Figure 8 , Figure 10 , Figure 12 Figure 5 Step 501, step 502, step 503 in the illustrated embodiment, Figure 6 Step 602, step 603, step 604 in the illustrated embodiment, Figure 8 Step 802, step 803, step 804 in the illustrated embodiment, Figure 10 Step 1002, step 1003, step 1004 in the illustrated embodiment, Figure 12 Step 1201, step 1203, step 1205 in the illustrated embodiment, and / or other procedures for supporting the techniques described herein. The processing module 1710 is configured to perform all the operations of the terminal device performed in embodiments of Figure 12 , Figure 13 , Figure 13 , Figure 13 , Figure 13 Figure 13 Step 1202 in the illustrated embodiment. The processing module 1710 can be configured to generate the precoding indication information. ​​​

[0406] In some possible implementations, the communication device 1700 can correspondingly implement the operation and functions of the terminal device in the above method embodiments. For example, the communication device 1700 can be a terminal device or a component (e.g., a chip or circuit) applied in the terminal device. The transceiver module 1720 can, for example, be used to perform... Figure 13 In the embodiments, all receiving or sending operations performed by the terminal device, for example Figure 13 Steps 1301, 1303, and 1305 in the illustrated embodiments, and / or other processes used to support the techniques described herein. Processing module 1710 is used to execute... Figure 18 In the embodiments, all operations performed by the terminal device except for sending and receiving operations, such as Figure 18 Step 1304 in the illustrated embodiment.

[0407] In some possible implementations, the communication device 1700 can correspondingly implement the operation and functions of the access network device in the above method embodiments. For example, the communication device 1700 can be an access network device or a component (e.g., a chip or circuit) applied in the access network device. The transceiver module 1720 can, for example, be used to perform... Figure 18 In the embodiments, all receiving or sending operations performed by the terminal device, for example Figure 18 Steps 1301, 1303, and 1305 in the illustrated embodiments, and / or other processes used to support the techniques described herein. Processing module 1710 is used to execute... Figure 5 In the embodiments, all operations performed by the terminal device except for sending and receiving operations, such as Figure 6 Step 1302 in the illustrated embodiment.

[0408] Figure 8 This is a schematic diagram of another communication device 180 provided in an embodiment of this application. Figure 10 The communication device mentioned above can be the terminal equipment. Figure 12 The communication device in the above-mentioned access network equipment can be the communication device mentioned above.

[0409] like Figure 5 As shown, the communication device 180 includes at least one processor 1820 and a transceiver 1810.

[0410] In other embodiments of this application, the processor 1820 and transceiver 1810 can be used to perform the functions or operations performed by the terminal device described above. For example, the processor 1820 can perform one or more of the following operations: Figure 6 Steps 501 and 503 in the illustrated embodiment are shown. Figure 8 Step 601 in the illustrated embodiment, Figure 10Step 801 in the illustrated embodiment, Figure 12 Step 1001 in the illustrated embodiment, Figure 12 Step 1204 in the illustrated embodiment. The transceiver 1810 may, for example, perform one or more of the following operations: Figure 5 Step 501, Step 502, Step 503 in the illustrated embodiment, Figure 6 Step 602, Step 603, Step 604 in the illustrated embodiment, Figure 8 Step 802, Step 803, Step 804 in the illustrated embodiment, Figure 10 Step 1002, Step 1003, Step 1004 in the illustrated embodiment, Figure 12 Step 1201, Step 1203, Step 1205 in the illustrated embodiment.

[0411] In some embodiments of the present application, the processor 1820 and the transceiver 1810 can be configured to perform the functions or operations, etc. performed by the access network device as described above. The processor 1820 may, for example, perform one or more of the following operations: Figure 13 Step 1202 in the illustrated embodiment. The transceiver 1810 may, for example, perform one or more of the following operations: Figure 13 Step 501, Step 502, Step 503 in the illustrated embodiment, Figure 13 Step 602, Step 603, Step 604 in the illustrated embodiment, Figure 13 Step 802, Step 803, Step 804 in the illustrated embodiment, Figure 18 Step 1002, Step 1003, Step 1004 in the illustrated embodiment, Figure 18 Step 1201, Step 1203, Step 1205 in the illustrated embodiment.

[0412] In some embodiments of the present application, the processor 1820 and the transceiver 1810 can be configured to perform the functions or operations, etc. performed by the terminal device as described above. The processor 1820 may, for example, perform one or more of the following operations: Figure 18 Step 1304 in the illustrated embodiment. The transceiver 1810 may, for example, perform one or more of the following operations: Figure 19 Step 1301, Step 1303, Step 1305 in the illustrated embodiment.

[0413] In some embodiments of the present application, the processor 1820 and the transceiver 1810 can be configured to perform the functions or operations, etc. performed by the access network device as described above. The processor 1820 may, for example, perform one or more of the following operations: Figure 19 Step 1302 in the illustrated embodiment. The transceiver 1810 may, for example, perform one or more of the following operations: Figure 19Step 1301, step 1303, step 1305 in the illustrated embodiment.

[0414] The transceiver 1810 is configured to communicate with other devices / apparatuses via transmission medium. The processor 1820 is configured to transceive data and / or signaling with the transceiver 1810, and is configured to implement the methods in the above-described method embodiments. The processor 1820 can implement the functions of the processing module 1710, and the transceiver 1810 can implement the functions of the transceiving module 1720.

[0415] Optionally, the communication apparatus 180 can further include at least one memory 1830 configured to store program instructions and / or data. The memory 1830 is coupled to the processor 1820. The coupling in the embodiments of the present application is indirect coupling or communication connection between apparatuses, units or modules, which can be electrical, mechanical or other forms, and is used for information interaction between apparatuses, units or modules. The processor 1820 can operate in cooperation with the memory 1830. The processor 1820 can execute program instructions stored in the memory 1830. At least one of the at least one memory can be included in the processor.

[0416] The specific connection medium between the transceiver 1810, the processor 1820 and the memory 1830 in the embodiments of the present application is not limited. In the embodiments of the present application, the memory 1830, the processor 1820 and the transceiver 1810 are connected through a bus 1840, and the bus is represented by a thick line in the Figure 19 embodiments of the present application. The connection mode between other components is only schematically illustrated and is not limited. The bus can be divided into an address bus, a data bus, a control bus, etc. For convenience, only one thick line is used to represent the bus in the Figure 19 embodiments of the present application, but it does not mean that there is only one bus or only one type of bus. ​

[0417] In the embodiments of the present application, the processor can be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present application can be directly embodied as hardware processor execution or executed by a combination of hardware and software modules in the processor.

[0418] ​ Another structural schematic diagram of a communication apparatus 190 is provided in the embodiments of the present application. As shown in ​ , the ​ communication apparatus includes a logic circuit 1901 and an interface 1902. ​ ​The processing module 1910 in the terminal device can be implemented by a logic circuit 1901, ​ The transceiving module 1920 in the terminal device can be implemented by an interface 1902. The logic circuit 1901 can be a chip, a processing circuit, an integrated circuit or a system on chip (SoC) chip, etc., and the interface 1902 can be a communication interface, an input / output interface, etc. In the embodiments of the present application, the logic circuit and the interface can also be coupled to each other. The specific connection mode of the logic circuit and the interface is not limited in the embodiments of the present application.

[0419] In some embodiments of the present application, the logic circuit and the interface can be used to perform the functions or operations of the terminal device described above.

[0420] In some other embodiments of the present application, the logic circuit and the interface can be used to perform the functions or operations of the terminal device described above.

[0421] 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 method of the above embodiments.

[0422] 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 method of the above embodiments is executed.

[0423] The present application also provides a communication system, which includes the terminal device and the access network device.

[0424] The above is only a 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 changes or replacements within the technical range disclosed in 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 above claims.

Claims

1. A communication method, characterized in that, include: The terminal device sends an uplink reference signal to the access network device according to the transmission pattern. The uplink reference signal resource includes N ports. The N ports in the transmission pattern correspond to different time-frequency resources. The N ports in the transmission pattern are carried by two or more orthogonal frequency division multiplexing (OFDM) symbols. Alternatively, the N ports in the transmission pattern are carried by two or more frequency domain combs and one OFDM symbol. N is an integer greater than 4. The terminal device receives precoding indication information from the access network device. The precoding indication information is used to indicate the precoding used for uplink data transmission. The precoding indication information is obtained by the access network device based on the uplink reference signal. The rows of the matrix corresponding to the precoding correspond one-to-one with the N ports.

2. The method according to claim 1, characterized in that, The uplink reference signal is a channel sounding reference signal (SRS), the uplink reference signal resource is an SRS resource, the uplink data is carried on a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH), and N is 8. The terminal device maps the uplink data to the antenna ports according to the precoding. The number of antenna ports is the same as the number of ports of the SRS resource, and the antenna ports correspond one-to-one with the ports of the SRS resource.

3. The method according to claim 1 or 2, characterized in that, The N is 8. The N ports in the transmission pattern are carried on two frequency domain combs with a comb tooth ratio of 2 and two OFDM symbols, and two ports located on the same frequency domain comb and OFDM symbol correspond to two different cyclic shift (CS) values; or, the N ports in the transmission pattern are carried on one frequency domain comb with a comb tooth ratio of 2 and two OFDM symbols, and four ports located on the same frequency domain comb and OFDM symbol correspond to four different CS values; or, the N ports in the transmission pattern are carried on two frequency domain combs with a comb tooth ratio of 2 and one OFDM symbol, and four ports located on the same frequency domain comb and OFDM symbol correspond to four different CS values.

4. The method according to claim 3, characterized in that, The method further includes: The terminal device determines the transmission pattern from two or more patterns based on the CS reference value indication of the uplink reference signal included in the configuration information of the uplink reference signal resource.

5. The method according to claim 4, characterized in that, The configuration information also includes the comb position indication of the uplink reference signal. and frequency domain comb tooth degree K TC The two or more drawings include at least two of the first drawing, the second drawing, and the third drawing; The comb teeth corresponding to the first port set of the N ports in the first pattern are The comb teeth corresponding to the second port set among the N ports are: The index of the OFDM symbol corresponding to the two ports in the first port set is l, and the OFDM index corresponding to the other two ports in the first port set is (l+n). The OFDM index corresponding to the two ports in the second port set is l, and the index of the OFDM symbol corresponding to the other two ports in the second port set is (l+n), where n is an integer greater than or equal to 1, and l is an integer greater than or equal to 0. The comb teeth corresponding to the first port set and the second port set among the N ports in the second pattern are: The index of the OFDM symbol corresponding to the first port set is l, and the index of the OFDM symbol corresponding to the second port set is (l+n), where n is an integer greater than or equal to 1, and l is an integer greater than or equal to 0. The comb teeth corresponding to the first port set of the N ports in the third pattern are: The comb teeth corresponding to the second port set among the N ports are: Furthermore, the index of the OFDM symbol corresponding to the first port set and the second port set is l, where l is an integer greater than or equal to 0; The ports contained in the first port set are different from the ports contained in the second port set.

6. The method according to claim 1 or 2, characterized in that, Where N is 8, the N ports in the transmission pattern are carried on 2 frequency domain combs with a frequency domain comb tooth ratio of 4 and 2 OFDM symbols, and two ports located on the same frequency domain comb and OFDM symbol correspond to 2 different CS values; or, the N ports in the transmission pattern are carried on 1 frequency domain comb tooth with a frequency domain comb tooth ratio of 4 and 2 OFDM symbols, and four ports located on the same frequency domain comb tooth and OFDM symbol correspond to 4 different CS values; or, the N ports in the transmission pattern are carried on 2 frequency domain comb teeth with a frequency domain comb tooth ratio of 4 and 1 OFDM symbol, and four ports located on the same frequency domain comb tooth and OFDM symbol correspond to 4 different CS values; or, the N ports in the transmission pattern are carried on 4 frequency domain comb teeth with a frequency domain comb tooth ratio of 4 and 1 OFDM symbol, and two ports located on the same frequency domain comb tooth and OFDM symbol correspond to 2 different CS values.

7. The method according to claim 6, characterized in that, The method further includes: The terminal device determines the transmission pattern from two or more patterns according to the CS reference value indication in the configuration information.

8. The method according to claim 7, characterized in that, The configuration information also includes a comb tooth position indicator. and frequency domain comb tooth degree K TC The two or more drawings include at least two of the first drawing, the second drawing, the third drawing, and the fourth drawing; The comb teeth corresponding to the first port set of the N ports in the first pattern are The comb teeth corresponding to the second port set among the N ports are: The index of the OFDM symbol corresponding to the two ports in the first port set is l, and the OFDM index corresponding to the other two ports in the first port set is (l+n). The OFDM index corresponding to the two ports in the second port set is l, and the index of the OFDM symbol corresponding to the other two ports in the second port set is (l+n), where n is an integer greater than or equal to 1, and l is an integer greater than or equal to 0. The comb teeth corresponding to the first port set and the second port set among the N ports in the second pattern are: The index of the OFDM symbol corresponding to the first port set is l, and the index of the OFDM symbol corresponding to the second port set is (l+n), where l and n are integers greater than or equal to 1; The comb teeth corresponding to the first port set of the N ports in the third pattern are: And the comb teeth corresponding to the second port set among the N ports are Furthermore, the index of the OFDM symbol corresponding to the first port set and the second port set is l, where l is an integer greater than or equal to 1; The comb teeth corresponding to the four port sets among the N ports in the fourth pattern are respectively: Furthermore, the index of the OFDM symbol corresponding to the four port sets is l, where l is an integer greater than or equal to 1. The ports contained in the first port set are different from the ports contained in the second port set.

9. The method according to claim 6, characterized in that, The method further includes: The terminal device determines the transmission pattern from two or more patterns based on the CS reference value indication, maximum CS indication, and symbol number included in the configuration information of the uplink reference signal resources; the two or more patterns include at least two of the first pattern, second pattern, third pattern, and fourth pattern, and the symbol number indicates the number of OFDM symbols carrying the N ports; The comb teeth corresponding to the first port set of the N ports in the first pattern are The comb teeth corresponding to the second port set among the N ports are: The index of the OFDM symbol corresponding to the two ports in the first port set is l, and the OFDM index corresponding to the other two ports in the first port set is (l+n). The OFDM index corresponding to the two ports in the second port set is l, and the index of the OFDM symbol corresponding to the other two ports in the second port set is (l+n), where n is an integer greater than or equal to 1, and l is an integer greater than or equal to 0. The comb teeth corresponding to the first port set and the second port set among the N ports in the second pattern are: The index of the OFDM symbol corresponding to the first port set is l, and the index of the OFDM symbol corresponding to the second port set is (l+n), where l and n are integers greater than or equal to 1; The comb teeth corresponding to the first port set of the N ports in the third pattern are: And the comb teeth corresponding to the second port set among the N ports are Furthermore, the index of the OFDM symbol corresponding to the first port set and the second port set is l, where l is an integer greater than or equal to 1; The comb teeth corresponding to the four port sets among the N ports in the fourth pattern are respectively: Furthermore, the index of the OFDM symbol corresponding to the four port sets is l, where l is an integer greater than or equal to 1. The ports contained in the first port set are different from the ports contained in the second port set.

10. The method according to claim 1 or 2, characterized in that, Where N is 8, the N ports in the transmission pattern are carried on 2 frequency domain combs with a frequency domain comb tooth ratio of 8 and 2 OFDM symbols, and two ports located on the same frequency domain comb tooth and OFDM symbol correspond to 2 different CS values; or, the N ports in the transmission pattern are carried on 1 frequency domain comb tooth with a frequency domain comb tooth ratio of 8 and 2 OFDM symbols, and four ports located on the same frequency domain comb tooth and OFDM symbol correspond to 4 different CS values; or, the N ports in the transmission pattern are carried on 2 frequency domain comb teeth with a frequency domain comb tooth ratio of 8 and 1 OFDM symbol, and four ports located on the same frequency domain comb tooth and OFDM symbol correspond to 4 different CS values; or, the N ports in the transmission pattern are carried on 4 frequency domain comb teeth with a frequency domain comb tooth ratio of 8 and 1 OFDM symbol, and two ports located on the same frequency domain comb tooth and OFDM symbol correspond to 2 different CS values.

11. The method according to claim 10, characterized in that, The method further includes: The terminal device determines the transmission pattern from two or more patterns based on the CS reference value indication and maximum CS indication of the uplink reference signal included in the configuration information of the uplink reference signal resource.

12. The method according to claim 11, characterized in that, The configuration information also includes a comb tooth position indicator. and frequency domain comb tooth degree K TC The two or more drawings include at least two of the first drawing, the second drawing, the third drawing, and the fourth drawing; The comb teeth corresponding to the first port set of the N ports in the first pattern are The comb teeth corresponding to the second port set among the N ports are: The index of the OFDM symbol corresponding to the two ports in the first port set is l, and the OFDM index corresponding to the other two ports in the first port set is (l+n). The OFDM index corresponding to the two ports in the second port set is l, and the index of the OFDM symbol corresponding to the other two ports in the second port set is (l+n), where n is an integer greater than or equal to 1, and l is an integer greater than or equal to 0. The comb teeth corresponding to the first port set and the second port set among the N ports in the second pattern are: The index of the OFDM symbol corresponding to the first port set is l, and the index of the OFDM symbol corresponding to the second port set is (l+n), where l and n are integers greater than or equal to 1; The comb teeth corresponding to the first port set of the N ports in the third pattern are: And the comb teeth corresponding to the second port set among the N ports are Furthermore, the index of the OFDM symbol corresponding to the first port set and the second port set is l, where l is an integer greater than or equal to 1; The comb teeth corresponding to the four port sets among the N ports in the fourth pattern are respectively: Furthermore, the index of the OFDM symbol corresponding to the four port sets is l, where l is an integer greater than or equal to 1; The ports contained in the first port set are different from the ports contained in the second port set.

13. The method according to claim 10, characterized in that, The method further includes: The terminal device determines the transmission pattern from two or more patterns based on the CS reference value indication, maximum CS indication, and symbol number included in the configuration information of the uplink reference signal resources; the two or more patterns include at least two of the first pattern, second pattern, third pattern, and fourth pattern, and the symbol number indicates the number of OFDM symbols carrying the N ports; The comb teeth corresponding to the first port set of the N ports in the first pattern are The comb teeth corresponding to the second port set among the N ports are: The index of the OFDM symbol corresponding to the two ports in the first port set is l, and the OFDM index corresponding to the other two ports in the first port set is (l+n). The OFDM index corresponding to the two ports in the second port set is l, and the index of the OFDM symbol corresponding to the other two ports in the second port set is (l+n), where n is an integer greater than or equal to 1, and l is an integer greater than or equal to 0. The comb teeth corresponding to the first port set and the second port set among the N ports in the second pattern are: The index of the OFDM symbol corresponding to the first port set is l, and the index of the OFDM symbol corresponding to the second port set is (l+n), where l and n are integers greater than or equal to 1; The comb teeth corresponding to the first port set of the N ports in the third pattern are: And the comb teeth corresponding to the second port set among the N ports are Furthermore, the index of the OFDM symbol corresponding to the first port set and the second port set is l, where l is an integer greater than or equal to 1; The comb teeth corresponding to the four port sets among the N ports in the fourth pattern are respectively: Furthermore, the index of the OFDM symbol corresponding to the four port sets is l, where l is an integer greater than or equal to 1; The ports contained in the first port set are different from the ports contained in the second port set.

14. The method according to any one of claims 1 to 13, characterized in that, The transmission power of the uplink reference signal is determined based on the transmission pattern; when the transmission pattern indicates that the N ports are carried on On each OFDM symbol, the maximum transmit power of each port does not exceed Among them, P CMAX The maximum transmission power configured for the terminal device. The integer is greater than 1. It equals the stated N.

15. A communication method, characterized in that, include: The access network device receives an uplink reference signal sent by a terminal device. The uplink reference signal resource of the uplink reference signal includes N ports, and the N ports are carried by two or more orthogonal frequency division multiplexing (OFDM) symbols, or the N ports are carried by two or more frequency domain combs and one OFDM symbol, where N is an integer greater than 4. The access network device sends precoding indication information to the terminal device. The precoding indication information is used to indicate the precoding used for uplink data transmission of the terminal device. The precoding indication information is obtained by the access network device based on the uplink reference signal. The rows of the matrix corresponding to the precoding correspond one-to-one with the N ports.

16. The method according to claim 15, characterized in that, The uplink reference signal is SRS, the uplink reference signal resource is SRS resource, the uplink data is carried on the Physical Uplink Shared Channel (PUSCH) or the Physical Uplink Control Channel (PUCCH), and N is 8; the precoding is used by the terminal device to map the uplink data to the antenna ports, the number of antenna ports is the same as the number of ports of the SRS resource, and the antenna ports correspond one-to-one with the ports of the SRS resource.

17. The method according to claim 15 or 16, characterized in that, The N is 8. The N ports are carried on two frequency domain combs with a comb tooth ratio of 2 and two OFDM symbols, and two ports located on the same frequency domain comb and OFDM symbol correspond to two different CS values; or, the N ports are carried on one frequency domain comb with a comb tooth ratio of 2 and two OFDM symbols, and four ports located on the same frequency domain comb and OFDM symbol correspond to four different CS values; or, the N ports are carried on two frequency domain combs with a comb tooth ratio of 2 and one OFDM symbol, and four ports located on the same frequency domain comb and OFDM symbol correspond to four different CS values.

18. The method according to claim 15 or 16, characterized in that, The number N is 8. The N ports are carried on two frequency domain combs with a comb tooth ratio of 4 and two OFDM symbols, and two ports located on the same frequency domain comb and OFDM symbol correspond to two different CS values; or, the N ports are carried on one frequency domain comb with a comb tooth ratio of 4 and two OFDM symbols, and four ports located on the same frequency domain comb and OFDM symbol correspond to four different CS values; or, the N ports are carried on two frequency domain combs with a comb tooth ratio of 4 and one OFDM symbol, and four ports located on the same frequency domain comb and OFDM symbol correspond to four different CS values; or, the N ports are carried on four frequency domain combs with a comb tooth ratio of 4 and one OFDM symbol, and two ports located on the same frequency domain comb and OFDM symbol correspond to two different CS values.

19. The method according to claim 15 or 16, characterized in that, Where N is 8, the N ports in the transmission pattern are carried on 2 frequency domain combs with a frequency domain comb tooth ratio of 8 and 2 OFDM symbols, and two ports located on the same frequency domain comb tooth and OFDM symbol correspond to 2 different CS values; or, the N ports in the transmission pattern are carried on 1 frequency domain comb tooth with a frequency domain comb tooth ratio of 8 and 2 OFDM symbols, and four ports located on the same frequency domain comb tooth and OFDM symbol correspond to 4 different CS values; or, the N ports in the transmission pattern are carried on 2 frequency domain comb teeth with a frequency domain comb tooth ratio of 8 and 1 OFDM symbol, and four ports located on the same frequency domain comb tooth and OFDM symbol correspond to 4 different CS values; or, the N ports in the transmission pattern are carried on 4 frequency domain comb teeth with a frequency domain comb tooth ratio of 8 and 1 OFDM symbol, and two ports located on the same frequency domain comb tooth and OFDM symbol correspond to 2 different CS values.

20. The method according to any one of claims 15 to 19, characterized in that, The transmission power of the uplink reference signal is determined by the terminal device based on the transmission pattern; when the transmission pattern indicates that the N ports are carried on On each OFDM symbol, the maximum transmit power of each port does not exceed Among them, P CMAX The maximum transmission power configured for the terminal device. The integer is greater than 1. It equals the stated N.

21. A communication device, characterized in that, Includes modules or units for implementing the method according to any one of claims 1 to 14.

22. A communication device, characterized in that, Includes modules or units for implementing the method of any one of claims 15 to 20.

23. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, the computer program including program instructions that, when executed by a processor, cause the method of any one of claims 1 to 14 to be performed, or the method of any one of claims 15 to 20 to be performed.

24. A communication device, characterized in that, The device includes a processor coupled to a memory storing instructions, the processor executing the instructions to cause the communication device to perform the method as claimed in any one of claims 1 to 14, or to cause the communication device to perform the method as claimed in any one of claims 15 to 20.

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