Systems and method of power control for uplink transmissions
Methods are disclosed that enable a user equipment (UE) to receive cell specific, UE specific and, in some embodiments, Physical Uplink Shared Channel (PUSCH) specific parameters from a network side component, such as a transmit/receive point, and use that information to set at least one PUSCH transmit power when transmitting to the network side.
1. A method for uplink transmissions, comprising:
acquiring, by a user equipment (UE), a power parameter specific to a physical uplink shared channel (PUSCH);
determining, by the UE, a pathloss value for the PUSCH in accordance with a downlink reference signal (DL RS) configuration, the DL RS configuration being associated with a resource index identifying an antenna port;
deriving, by the UE, a transmission power for the PUSCH in accordance with the power parameter and the pathloss value; and
transmitting, by the UE, the PUSCH on the antenna port at the transmission power.
2. The method of claim 1 , wherein the DL RS configuration comprises a synchronization signal (SS) block configuration for reference signal received power (RSRP) measurement, the SS block configuration indicating a SS block comprising a downlink synchronization signal, and a demodulation reference signal (DMRS) for a physical broadcast channel (PBCH).
3. The method of claim 1 , wherein the DL RS configuration comprises a channel state information reference signal (CSI-RS) for DL mobility measurement, or a CSI-RS for downlink beam management measurement.
4. The method of claim 1 , wherein the DL RS configuration comprises a DL RS transmission power, or a PUSCH specific resource index.
5. The method of claim 1 , wherein the power parameter includes at least one of: a pathloss parameter specific to the PUSCH, an initial target PUSCH power parameter specific to the PUSCH, or a closed-loop factor specific to the PUSCH.
6. The method of claim 5 , wherein the closed-loop factor is based on a transmit power control command or a transmission format indication.
7. The method of claim 1 , wherein the power parameter comprises a common cell specific power parameter or a UE specific power parameter.
8. The method of claim 7 , wherein the common cell specific power parameter includes a cell specific initial target PUSCH power parameter.
9. The method of claim 1 , wherein the power parameter is represented as an offset from a common cell specific power parameter or a UE specific power parameter.
10. The method of claim 1 , wherein the acquiring the power parameter comprises:
receiving, by the UE, the power parameter from a base station through a radio resource control message.
11. A device comprising:
at least one processor;
a computer-readable medium, having stored thereon computer-executable instructions that, when executed by the at least one processor cause the device to:
acquire a power parameter specific to a physical uplink shared channel (PUSCH);
determine a pathloss value for the PUSCH in accordance with a downlink reference signal (DL RS) configuration, the DL RS configuration being associated with a resource index identifying an antenna port;
derive a transmission power for the PUSCH in accordance with the power parameter and the pathloss value; and
transmit the PUSCH on the antenna port at the transmission power.
12. The device of claim 11 , wherein the DL RS configuration comprises a synchronization signal (SS) block configuration for reference signal received power (RSRP) measurement, the SS block configuration indicating a SS block comprising a downlink synchronization signal, and a demodulation reference signal (DMRS) for a physical broadcast channel (PBCH).
13. The device of claim 11 , wherein the DL RS configuration comprises a channel state information reference signal (CSI-RS) for DL mobility measurement, or a CSI-RS for downlink beam management measurement.
14. The device of claim 11 , wherein the DL RS configuration comprises a DL RS transmission power, or a PUSCH specific resource index.
15. The device of claim 11 , wherein the power parameter includes at least one of: a pathloss parameter specific to the PUSCH, an initial target PUSCH power parameter specific to the PUSCH, or a closed-loop factor specific to the PUSCH.
16. The device of claim 15 , wherein the closed-loop factor is based on a transmit power control command or a transmission format indication.
17. The device of claim 11 , wherein the power parameter comprises a common cell specific power parameter or a UE specific power parameter.
18. The device of claim 17 , wherein the common cell specific power parameter includes a cell specific initial target PUSCH power parameter.
19. The device of claim 11 , wherein the power parameter is represented as an offset from a common cell specific power parameter or a UE specific power parameter.
20. The device of claim 11 , wherein the computer-executable instructions that cause the device to acquire the power parameter comprise computer-executable instructions that, when executed by the at least one processor, cause the device to receive the power parameter from a base station through a radio resource control message.