User equipment transmission power control
Embodiments of the present disclosure provide for mechanisms to enable full-power uplink transmission. Other embodiments may be described and claimed.
1. One or more non-transitory, computer-readable media having instructions that, when executed by one or more processors, cause a user equipment (UE) to:
configure one or more uplink codebooks, wherein configuring the one or more uplink codebooks include:
configuring a first scaling factor for one or more first antenna ports of the UE, and
configuring a second scaling factor for one or more second antenna ports of the UE, the second scaling factor being distinct from the first scaling factor;
receive feedback information from a first access node;
select, based on the feedback information, a precoder from a codebook of the one or more codebooks for communication with the first access node; and
apply the first scaling factor to the precoder to communicate with the first access node using the one or more first antenna ports, while concurrently communicating with a second access node using the one or more second antenna ports, wherein the first scaling factor is applied to the precoder to prevent a total transmission power from all antenna ports of the UE from exceeding a maximum transmission power of the UE, wherein the UE is to support full-power transmission.
2. The one or more non-transitory, computer-readable media of claim 1 , wherein the UE supports non-coherent transmission and the precoder is an antenna-selection-based precoder.
3. The one or more non-transitory, computer-readable media of claim 1 , wherein the codebook is a single-layer codebook for two antenna ports and the precoder is
[
1
0
]
or
[
0
1
]
.
4. The one or more non-transitory, computer-readable media of claim 1 , wherein the instructions, when executed, further cause the UE to: receive configuration information to configure the first scaling factor or the second scaling factor.
5. The one or more non-transitory, computer-readable media of claim 4 , wherein to receive configuration information, the UE is to process higher-layer signaling.
6. The one or more non-transitory, computer-readable media of claim 4 , wherein the configuration information is to configure scaling factors per antenna port (AP), per antenna port group, or across all antenna ports.
7. The one or more non-transitory, computer-readable media of claim 6 , wherein the instructions, when executed, further cause the UE to:
generate a report to indicate a maximum scaling factor supported per antenna port (AP), AP group, or across all APs.
8. The one or more non-transitory, computer-readable media of claim 7 , wherein at least one of the first scaling factor or the second scaling factor is smaller than or equal to the maximum scaling factor.
9. The one or more non-transitory, computer-readable media of claim 1 , wherein the instructions, when executed, further cause the UE to:
generate a capability indication to indicate that the UE supports full-power transmission; and
transmit the capability indication to an access node.
10. An apparatus to be employed in a user equipment (UE), the apparatus comprising:
memory to store one or more codebooks; and
baseband circuitry, coupled with the memory, to:
generate a physical uplink shared channel (PUSCH) transmission to be transmitted as a single-layer transmission on a first subset of antenna ports of the UE;
precode the PUSCH transmission with a precoder selected from a codebook of the one or more codebooks, wherein the precoder is scaled with a first scaling factor corresponding to the first subset of antenna ports, and wherein a second scaling factor distinct from the first scaling factor is applied for communication using a second subset of antenna ports of the UE; and
cause the PUSCH transmission to be transmitted to a first access node using the first subset of antenna ports while concurrently communicating with a second access node using the second subset of antenna ports.
11. The apparatus of claim 10 , wherein the baseband circuitry is further to cause the PUSCH transmission to be transmitted as a non-coherent transmission or a partial-coherent transmission.
12. The apparatus of claim 10 , wherein the baseband circuitry is to generate and cause transmission of a report to indicate that the UE supports full-power transmission.
13. The apparatus of claim 10 , wherein the baseband circuitry is to generate and cause transmission of a report to indicate the UE supports PUSCH to phase tracking reference signal (PT-RS) Energy Per Resource Element (EPRE) ratio configuration.
14. One or more non-transitory, computer-readable media having instructions that, when executed by one or more processors, cause an access node to:
determine, based on first capability information, that a first user equipment (UE) supports full-power uplink transmission;
provide first configuration information to configure the first UE with first codebook information to provide full-power uplink transmission, wherein each precoder of the first codebook is scaled using a first scaling factor to enable the first UE to concurrently communicate with a different access node using a second scaling factor that is distinct from the first scaling factor; and
provide second configuration information to configure the second UE with second codebook information to provide non-full-power uplink transmission.
15. The one or more non-transitory, computer-readable media of claim 14 , wherein the first and second codebook information is to configure first and second codebooks, respectively.
16. The one or more non-transitory, computer-readable media of claim 15 , wherein the first codebook comprises precoders
[
1
0
]
or
[
0
1
]
and the second codebook comprises precoders
1
2
[
1
0
]
and
1
2
[
0
1
]
.
17. The one or more non-transitory, computer-readable media of claim 14 , wherein the first codebook information is to configure a first codebook with a first scaling factor and the second codebook information is to configure the first codebook with a second scaling factor.
18. The one or more non-transitory, computer-readable media of claim 14 , wherein the instructions, when executed, further cause the access node to: provide the second configuration information to configure the second UE with the second codebook based on capability information received from the second UE or as a default configuration.
19. The one or more non-transitory, computer-readable media of claim 14 , wherein the first scaling factor and the second scaling factor are selected to allow a total transmission power from all ports of the first UE to reach the maximum transmission power.
20. A user equipment (UE) comprising:
transmit circuitry to provide radio frequency signals for transmission by a plurality of antenna panels of the UE; and
baseband circuitry to scale power of one or more first antenna panels of the plurality of antenna panels using a first scaling factor and scale one or more second antenna panels of the plurality of antenna panels using a second scaling factor when a total transmission power for all antenna panels exceed a maximum transmission power for concurrent transmission to a first access node and a second access node using respectively the one or more first antenna panels and the one or more second antenna panels,
wherein for a transmission occasion, the transmission power for individual antenna panels with uplink transmissions are scaled equally or based on priority associated with respective uplink transmissions.
21. The UE of claim 20 , wherein to scale power of an antenna panel, the baseband circuitry is to:
scale down power of the one or more first antenna panels associated with a first uplink transmission, wherein the one or more second antenna panels are associated with a second uplink transmission and the second uplink transmission has a priority that is higher than a priority of the first uplink transmission.
22. The UE of claim 21 , wherein the baseband circuitry is to determine relative priorities of the first and second uplink transmissions based on type of uplink signals, content of uplink signals, time-domain behavior of uplink signals, or triggering scheme of uplink signals.