Method and apparatus for signaling in support of uplink multi-beam operation
Methods and apparatuses for uplink multi-beam operation. A method for operating a user equipment (UE) includes receiving, from a base station, an aperiodic reference signal (RS) trigger and, at a later time instant, an uplink (UL) beam indication. The method further includes decoding the aperiodic RS trigger and decoding the UL beam indication. The method includes determining, from the UL beam indication, a transmit spatial filter applied to a signal to be transmitted on a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH) and transmitting, to the base station, the signal on the PUSCH or the PUCCH. The transmit spatial filter corresponds to a reference RS. The UL beam indication includes a state of a transmit configuration associated with the reference RS.
1. A user equipment (UE) comprising:
a transceiver configured to receive, from a base station, an uplink (UL) beam indication; and
a processor operably connected to the transceiver, the processor configured to:
decode the UL beam indication; and
determine, from the UL beam indication, a transmit spatial filter applied to a signal to be transmitted on a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH),
wherein the transceiver is further configured to transmit, to the base station, the signal on the PUSCH or the PUCCH,
wherein the transmit spatial filter corresponds to a reference RS, and
wherein the UL beam indication includes a state of a transmit configuration associated with the reference RS.
2. The UE of claim 1 , wherein the reference RS is at least a channel state information RS (CSI-RS) or a sounding RS (SRS).
3. The UE of claim 1 , wherein the UL beam indication is included in an UL grant received on a physical downlink control channel (PDCCH).
4. The UE of claim 1 , wherein the UL beam indication is included in a DL-related DCI received on a physical downlink control channel (PDCCH).
5. A base station (BS) comprising:
a processor configured to generate an uplink (UL) beam indication; and
a transceiver operably connected to the processor, the transceiver configured to:
transmit, to a user equipment (UE), the UL beam indication; and
receive, from the UE, a signal on a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH),
wherein the UL beam indication includes a state of a transmit configuration associated with a transmit spatial filter that corresponds to a reference RS.
6. The BS of claim 5 , wherein the reference RS is at least a channel state information RS (CSI-RS) or a sounding RS (SRS).
7. The BS of claim 5 , wherein the UL beam indication is included in an UL grant transmitted on a physical downlink control channel (PDCCH).
8. The BS of claim 5 , wherein the UL beam indication is included in a DL-related DCI transmitted on a physical downlink control channel (PDCCH).
9. A method for operating a user equipment (UE), the method comprising:
receiving, from a base station, an uplink (UL) beam indication;
decoding the UL beam indication;
determining, from the UL beam indication, a transmit spatial filter applied to a signal to be transmitted on a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH); and
transmitting, to the base station, the signal on the PUSCH or the PUCCH,
wherein the transmit spatial filter corresponds to a reference RS, and
wherein the UL beam indication includes a state of a transmit configuration associated with the reference RS.
10. The method of claim 9 , wherein the reference RS is at least a channel state information RS (CSI-RS) or a sounding RS (SRS).
11. The method of claim 9 , wherein the UL beam indication is included in an UL grant received on a physical downlink control channel (PDCCH).
12. The method of claim 9 , wherein the UL beam indication is included in a DL-related DCI received on a physical downlink control channel (PDCCH).