Dynamic indication of physical uplink shared channel (PUSCH) transmission to a single transmission reception point (TRP) or multiple TRPs
A method, system and apparatus for dynamic indication of physical uplink shared channel (PUSCH) transmission to a single transmission/reception point (TRP) or multiple TRPs are disclosed. According to one aspect, a method in a network node includes configure the WD with a first sounding reference signal, SRS, resource set, and with a second SRS resource set for physical uplink shared channel, PUSCH, and schedule, by sending a downlink control information, DCI, to the WD, a PUSCH transmission by the WD in at least one PUSCH transmission occasion associated with one of the first SRS resource set, the second SRS resource set, and both the first and the second SRS resource sets.
1 . A network node configured to communicate with a wireless device, WD, the network node comprising processing circuitry configured to:
transmit to the WD a transmission and reception point, TRP, indicator, TRPI, field, the TRPI field indicating one or both of a first TRP and a second TRP to which a physical uplink shared channel, PUSCH, is to be transmitted, the TRPI field indicating which of a plurality of sounding reference signals, SRS, of an SRS resource set is enabled for the indicated one or both TRPs, the TRPI field indicating at least three codepoints, a first codepoint indicating a first SRS resource set, a second codepoint indicating a second SRS resource set, and a third codepoint indicating both the first and the second SRS resource sets; and
schedule, by sending a downlink control information, DCI, to the WD, a PUSCH transmission by the WD in at least one PUSCH transmission occasion associated with the one or both of the first TRP and the second TRP.
2 . The network node of claim 1 , wherein the DCI that schedules the PUSCH transmission includes a first reference signal resource indicator, SRI, field and a second SRI field.
3 . The network node of claim 1 , wherein the DCI that schedules the PUSCH transmission includes a first transmit precoding matrix indicator, TPMI, field and a second TMPI field.
4 . The network node of claim 1 , wherein the scheduled PUSCH transmission by the WD is according to a first SRS resource indicator, SRI, a first transmit precoding matrix indicator, TPMI, and a first transmit power control, TPC command.
5 . A method implemented in a network node configured to communicate with a wireless device, WD, the method comprising:
transmitting to the WD a transmission and reception point, TRP, indicator, TRPI, field, the TRPI field indicating one or both of a first TRP and a second TRP to which a physical uplink shared channel, PUSCH, is to be transmitted, the TRPI field indicating which of a plurality of sounding reference signals, SRS, of an SRS resource set is enabled for the indicated one or both TRPs, the TRPI field indicating at least three codepoints, a first codepoint indicating a first SRS resource set, a second codepoint indicating a second SRS resource set, and a third codepoint indicating both the first and the second SRS resource sets; and
scheduling, by sending a downlink control information, DCI, to the WD, a PUSCH transmission by the WD in at least one PUSCH transmission occasions associated with the one or both of the first TRP and the second TRP.
6 . The method of claim 5 , wherein the DCI that schedules the PUSCH transmission includes a first sounding reference signal resource indicator, SRI, field and a second SRI field.
7 . The method of claim 5 , wherein the DCI that schedules the PUSCH transmission includes a first transmit precoding matrix indicator, TPMI, field and a second TMPI field.
8 . The method of claim 5 , wherein the scheduled PUSCH transmission by the WD is according to a first SRS resource indicator, SRI, a first transmit precoding matrix indicator, TPMI, and a first transmit power control, TPC command.
9 . A wireless device, WD, configured to communicate with one or more network nodes, the WD comprising a radio interface configured to:
receive from one of the one or more network nodes a configuration of a transmission and reception point, TRP, indicator, TRPI, field, the TRPI field indicating one or both of a first TRP and a second TRP to which a Physical Uplink Shared Channel, PUSCH, transmission is to be transmitted, the TRPI field indicating which of a plurality of sounding reference signals, SRS, of an SRS resource set is enabled for the indicated one or both TRPs, the TRPI field indicating at least three codepoints, a first codepoint indicating a first SRS resource set, a second codepoint indicating a second SRS resource set, and a third codepoint indicating both the first and the second SRS resource sets;
receive a downlink control information, DCI, configured to schedule a PUSCH transmission in at least one PUSCH transmission occasion,
transmit the scheduled PUSCH transmission to the indicated one or both of the first TRP and the second TRP during the at least one PUSCH transmission occasion.
10 . The WD of claim 9 , wherein the radio interface is further configured to transmit the scheduled PUSCH in the at least one PUSCH transmission occasion according to one of a first and second sounding reference signal resource indicator, SRI, one of a first and second transmit precoding matrix indicator, TPMI, and one of a first and second transmit power control, TPC, command.
11 . The WD of claim 9 , wherein the radio interface is further configured to transmit the scheduled PUSCH in at least a first transmission occasion according to one of a first sounding reference signal resource indicator, SRI, a first TPMI, and a first TPC and in a second transmission occasion(s) according to one of a second SRI, a second TPMI, and a second TPC when both the first and the second SRS resource sets are indicated by the third codepoint.
12 . A method in a wireless device, WD, configured to communicate with one or more network nodes, the method comprising:
receiving from one of the one or more network nodes a configuration of a transmission and reception point, TRP, indicator, TRPI, field, the TRPI field indicating one or both of a first TRP and a second TRP to which a Physical Uplink Shared Channel, PUSCH, transmission is to be transmitted, the TRPI field indicating which of a plurality of sounding reference signals, SRS, of an SRS resource set is enabled for the indicated one or both TRPs, the TRPI field indicating at least three codepoints, a first codepoint indicating a first SRS resource set, a second codepoint indicating a second SRS resource set, and a third codepoint indicating both the first and the second SRS resource sets;
receiving a downlink control information, DCI, configured to schedule a PUSCH transmission in at least one PUSCH transmission occasion;
and
transmitting the scheduled PUSCH transmission to the indicated one or both of the first TRP and the second TRP during the at least one PUSCH transmission occasion.
13 . The method of claim 12 , further comprising transmitting the scheduled PUSCH in the at least one PUSCH transmission occasion according to one of a first and second sounding reference signal resource indicator, SRI, one of a first and second transmit precoding matrix indicator, TPMI, and one of a first and second transmit power control, TPC, command.
14 . The method of claim 12 , further comprising transmitting the scheduled PUSCH in at least a first transmission occasion according to one of a first sounding reference signal resource indicator, SRI, a first TPMI, and a first TPC and in a second transmission occasion(s) according to one of a second SRI, a second TPMI, and a second TPC when both the first and the second SRS resource sets are indicated by the third codepoint.