Methods, devices and computer storage media for communication
Embodiments of the present disclosure relate to a method, device and computer readable storage medium of communication. The method comprises receiving at a terminal device a DCI for scheduling at least one PUSCH transmission from a network device. The DCI comprises a first field indicating that the at least one PUSCH transmission is to be transmitted based on a SRS resource set from a plurality of SRS resource sets or the plurality of SRS resource sets, and a second field indicating an index of the single SRS resource set for transmitting the at least one PUSCH transmission. The method further comprises transmitting, by the terminal device, the at least one PUSCH transmission based on the DCI to the network device. In this way, when supporting dynamic switching between single-TRP transmission and multi-TRP transmission, the newly-introduced overhead may be minimized.
1 . A method of communication performed by a terminal device, comprising:
receiving, from a network device, a downlink control information (DCI) scheduling a Physical Uplink Shared Channel (PUSCH), wherein the DCI comprises
a first field indicating one or both of a first sounding reference signal (SRS) resource set and
a second SRS resource set are used for transmission of the PUSCH; and
transmitting, to the network device, the PUSCH based on a parameter defining the maximum number of layers applied for the first SRS resource set and the second SRS resource set in a case where the first field indicates the first SRS resource set is used for transmission of a first subset of the PUSCH and the second SRS resource set is used for transmission of a second subset of the PUSCH, the value range of the maximum number is {1, 2}.
2 . The method of claim 1 , wherein the DCI comprises a second field indicating a first number of layers associated with the first SRS resource set and a third field indicating a second number of layers associated with the second SRS resource set, the first number is smaller than or equal to the maximum number defined by the parameter and the second number is smaller than or equal to the maximum number defined by the parameter.
3 . The method of claim 1 , wherein the first field comprises a first indication indicating the PUSCH is based on a first parameter set and a second indication indicating the PUSCH is based on a second parameter set, and each of the first parameter set and the second parameter set comprises at least one of: open loop power control parameter, timing advance indication and timing advance group (TAG) indication.
4 . A method of communication performed by a network device, comprising:
transmitting, to a terminal device, a downlink control information (DCI) scheduling a Physical Uplink Shared Channel (PUSCH), wherein the DCI comprises
a first field indicating one or both of a first sounding reference signal (SRS) resource set and
a second SRS resource set are used for transmission of the PUSCH; and
receiving, from the terminal device, the PUSCH based on a parameter defining the maximum number of layers applied for the first SRS resource set and the second SRS resource set in a case where the first field indicates the first SRS resource set is used for transmission of a first subset of the PUSCH and the second SRS resource set is used for transmission of a second subset of the PUSCH, the value range of the maximum number is {1, 2}.
5 . The method of claim 4 , wherein the DCI comprises a second field indicating a first number of layers associated with the first SRS resource set and a third field indicating a second number of layers associated with the second SRS resource set, the first number is smaller than or equal to the maximum number defined by the parameter and the second number is smaller than or equal to the maximum number defined by the parameter.
6 . The method of claim 4 , wherein the first field comprises a first indication indicating the PUSCH is based on a first parameter set and a second indication indicating the PUSCH is based on a second parameter set, and each of the first parameter set and the second parameter set comprises at least one of: open loop power control parameter, timing advance indication and timing advance group (TAG) indication.
7 . A terminal device, comprising:
a processor configured to cause the terminal device to:
receive, from a network device, a downlink control information (DCI) scheduling a physical uplink shared channel (PUSCH), wherein the DCI comprises a first field indicating one or both of a first sounding reference signal (SRS) resource set and a second SRS resource set are used for transmission of the PUSCH; and
transmit, to the network device, the PUSCH based on a parameter defining the maximum number of layers applied for the first SRS resource set and the second SRS resource set in a case where the first field indicates the first SRS resource set is used for transmission of a first subset of the PUSCH and the second SRS resource set is used for transmission of a second subset of the PUSCH, the value range of the maximum number is {1, 2}.
8 . The terminal device of claim 7 , wherein the DCI comprises a second field indicating a first number of layers associated with the first SRS resource set and a third field indicating a second number of layers associated with the second SRS resource set, the first number is smaller than or equal to the maximum number defined by the parameter and the second number is smaller than or equal to the maximum number defined by the parameter.
9 . The terminal device of claim 7 , wherein the first field comprises a first indication indicating the PUSCH is based on a first parameter set and a second indication indicating the PUSCH is based on a second parameter set, and each of the first parameter set and the second parameter set comprises at least one of: open loop power control parameter, timing advance indication and timing advance group (TAG) indication.