Dynamic uplink transmission scheme indication for multi-panel user equipment

1 . An apparatus, comprising:

at least one processor; and

at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to:

indicate to a network a capability of the apparatus to support simultaneous multi-panel transmission to the network; and

receive a configuration of two sounding reference signal resource sets for a physical uplink shared channel and a three-bit sounding reference signal resource set indicator for the simultaneous multi-panel transmission over the physical uplink shared channel, wherein a first value of the three-bit sounding reference signal resource set indicator indicates that the apparatus performs spatial domain multiplexing using two panels for the simultaneous multi-panel transmission over the physical uplink shared channel, and wherein a third value of the three-bit sounding reference signal resource set indicator indicates that the apparatus performs frequency division multiplexing type B transmission using two panels for the simultaneous multi-panel transmission over the physical uplink shared channel.

2 . The apparatus of claim 1 , wherein the physical uplink shared channel is codebook-based.

3 . The apparatus of claim 1 , wherein the apparatus is triggered to transmit or use sounding reference signal resources for uplink channel sounding purposes after the configuration is received.

4 . The apparatus of claim 1 , wherein the instructions, when executed by the at least one processor, cause the apparatus at least to

receive a scheduling command from the network for the simultaneous multi-panel transmission over the physical uplink shared channel, the scheduling command comprising the three-bit sounding reference signal resource set indicator.

5 . The apparatus of claim 4 , wherein the scheduling command is received in a physical downlink control channel message from the network.

6 . The apparatus of claim 1 , wherein a second value of the three-bit sounding reference signal resource set indicator indicates that the apparatus performs single frequency network transmission using two panels for the simultaneous multi-panel transmission over the physical uplink shared channel.

7 . The apparatus of claim 1 , wherein a fourth value of the three-bit sounding reference signal resource set indicator indicates that the apparatus performs spatial domain multiplexing repetition transmission using two panels for the simultaneous multi-panel transmission over the physical uplink shared channel.

8 . The apparatus of claim 1 , wherein the configuration of the two sounding reference signal resource sets is received via radio resource control signaling from the network, and the three-bit sounding reference signal resource set indicator is received in a physical downlink control channel message from the network.

9 . An apparatus, comprising:

at least one processor; and

at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to:

receive an indication of a capability of a user equipment to support simultaneous multi-panel transmission from the user equipment; and

configure the user equipment with two sounding reference signal resource sets for a physical uplink shared channel and a three-bit sounding reference signal resource set indicator for the simultaneous multi-panel transmission over the physical uplink shared channel, wherein a first value of the three-bit sounding reference signal resource set indicator indicates that the user equipment performs spatial domain multiplexing using two panels for the simultaneous multi-panel transmission over the physical uplink shared channel, and wherein a third value of the three-bit sounding reference signal resource set indicator indicates that the user equipment performs frequency division multiplexing type B transmission using two panels for the simultaneous multi-panel transmission over the physical uplink shared channel.

10 . The apparatus of claim 9 , wherein the physical uplink shared channel is codebook-based.

11 . The apparatus of claim 9 , wherein the user equipment is triggered to transmit or use sounding reference signal resources for uplink channel sounding purposes after the user equipment is configured.

12 . The apparatus of claim 9 , wherein the instructions, when executed by the at least one processor, cause the apparatus at least to

provide a scheduling command to the user equipment for the simultaneous multi-panel transmission over the physical uplink shared channel, the scheduling command comprising the three-bit sounding reference signal resource set indicator.

13 . The apparatus of claim 12 , wherein the scheduling command is transmitted in a physical downlink control channel message to the user equipment.

14 . The apparatus of claim 9 , wherein a second value of the three-bit sounding reference signal resource set indicator indicates that the user equipment performs single frequency network transmission using two panels for the simultaneous multi-panel transmission over the physical uplink shared channel.

15 . The apparatus of claim 9 , wherein a fourth value of the three-bit sounding reference signal resource set indicator indicates that the user equipment performs spatial domain multiplexing repetition transmission using two panels for the simultaneous multi-panel transmission over the physical uplink shared channel.

16 . The apparatus of claim 9 , wherein the instructions, when executed by the at least one processor, cause the apparatus at least to

transmit, to the user equipment, the configuration of the two sounding reference signal resource sets via radio resource control signaling; and

transmit, to the user equipment, the three-bit sounding reference signal resource set indicator in a physical downlink control Channel message.