Closed loop power control for PUSCH
Systems, devices, and techniques for transmit power control (TPC) in wireless communication systems are described. A described technique performed by a user equipment (UE) includes signaling that enables transmit power control (TPC) accumulation; receiving, by the UE, downlink control information (DCI) messages corresponding to respective physical uplink shared channel (PUSCH) transmission occasions; determining, by the UE, power control adjustment states for the PUSCH transmission occasions; and transmitting, by the UE, in the PUSCH transmission occasions in accordance with the power control adjustment states. Determining the power control adjustment states can include selectively applying TPC accumulation to one or more of the power control adjustment states based on a determination that at least one of the PUSCH transmission occasions is out-of-order based on an arrival ordering of the DCI messages.
1. A method comprising:
receiving signaling that enables transmit power control (TPC) accumulation;
receiving downlink control information (DCI) messages corresponding to respective physical uplink shared channel (PUSCH) transmission occasions;
determining power control adjustment states for the PUSCH transmission occasions, wherein determining the power control adjustment states comprises selectively applying TPC accumulation to one or more of the power control adjustment states based on a determination that at least one of the PUSCH transmission occasions is out-of-order based on an arrival ordering of the DCI messages; and
transmitting in the PUSCH transmission occasions in accordance with the power control adjustment states,
wherein receiving the DCI messages comprises receiving an indication whether a TPC command for an out-of-order PUSCH transmission occasion is to be accumulated for a subsequent PUSCH transmission occasion occurring after the out-of-order PUSCH transmission occasion, and
wherein determining the power control adjustment states comprises determining a power control adjustment state for the subsequent PUSCH transmission occasion by ignoring the TPC command for the out-of-order PUSCH transmission occasion.
2. The method of claim 1 , wherein the out-of-order PUSCH transmission occasion comprises a plurality of out-of-order PUSCH transmission occasions, wherein determining the power control adjustment states comprises applying TPC accumulation among the plurality of out-of-order PUSCH transmission occasions.
3. The method of claim 1 , wherein determining the power control adjustment states comprises determining whether a first PUSCH transmission occasion occurs out-of-order with respect to a second PUSCH transmission occasion based on an arrival ordering of the DCI messages, wherein the first PUSCH transmission occasion occurs before the second PUSCH transmission occasion.
4. The method of claim 1 , wherein:
a first PUSCH transmission occasion occurs before a second PUSCH transmission occasion,
the second PUSCH transmission occasion occurs before a third PUSCH transmission occasion,
the DCI message for the second PUSCH transmission occasion arrives before the first PUSCH transmission occasion,
the DCI message for the second PUSCH transmission occasion arrives before the DCI message for a third PUSCH transmission occasion, and
the DCI message for the first PUSCH transmission occasion arrives before the DCI message for the third PUSCH transmission occasion.
5. The method of claim 4 , wherein determining the power control adjustment states comprises determining a first power control adjustment state corresponding to the first PUSCH transmission occasion, determining a second power control adjustment state corresponding to the second PUSCH transmission occasion, and determining a third power control adjustment state corresponding to the third PUSCH transmission occasion.
6. The method of claim 5 , wherein the third power control adjustment state is based on i) a TPC command in the DCI message for the third PUSCH transmission occasion and ii) the second power control adjustment state.
7. The method of claim 6 , wherein the second power control adjustment state is not accumulative of a previous state, and wherein the second power control adjustment state is given by a TPC command absolute value indicated in the DCI message for the second PUSCH transmission occasion.
8. An apparatus comprising:
circuitry configured to receive signaling that enables transmit power control (TPC) accumulation, receive downlink control information (DCI) messages corresponding to respective physical uplink shared channel (PUSCH) transmission occasions, and transmit in the PUSCH transmission occasions in accordance with respective power control adjustment states; and
circuitry configured to perform operations comprising determining the power control adjustment states for the PUSCH transmission occasions, wherein determining the power control adjustment states comprises selectively applying TPC accumulation to one or more of the power control adjustment states based on a determination that at least one of the PUSCH transmission occasions is out-of-order based on an arrival ordering of the DCI messages,
wherein determining the power control adjustment states comprises determining whether a first PUSCH transmission occasion occurs out-of-order with respect to a second PUSCH transmission occasion based on an arrival ordering of the DCI messages, wherein the first PUSCH transmission occasion occurs before the second PUSCH transmission occasion, and
wherein determining the power control adjustment states comprises determining a power control adjustment state by ignoring a TPC command in a DCI message corresponding to the first PUSCH transmission occasion based on a determination that the first PUSCH transmission occasion occurs out-of-order.
9. The apparatus of claim 8 , wherein the DCI messages comprise an indication whether a TPC command for an out-of-order PUSCH transmission occasion is to be accumulated for a subsequent PUSCH transmission occasion occurring after the out-of-order PUSCH transmission occasion.
10. The apparatus of claim 9 , wherein the out-of-order PUSCH transmission occasion comprises a plurality of out-of-order PUSCH transmission occasions, wherein determining the power control adjustment states comprises applying TPC accumulation among the plurality of out-of-order PUSCH transmission occasions.
11. The apparatus of claim 9 , wherein determining the power control adjustment states comprises determining a power control adjustment state for the subsequent PUSCH transmission occasion by ignoring the TPC command for the out-of-order PUSCH transmission occasion.
12. The apparatus of claim 8 , wherein:
a first PUSCH transmission occasion occurs before a second PUSCH transmission occasion,
the second PUSCH transmission occasion occurs before a third PUSCH transmission occasion,
the DCI message for the second PUSCH transmission occasion arrives before the first PUSCH transmission occasion,
the DCI message for the second PUSCH transmission occasion arrives before the DCI message for a third PUSCH transmission occasion, and
the DCI message for the first PUSCH transmission occasion arrives before the DCI message for the third PUSCH transmission occasion.
13. The apparatus of claim 12 , wherein determining the power control adjustment states comprises determining a first power control adjustment state corresponding to the first PUSCH transmission occasion, determining a second power control adjustment state corresponding to the second PUSCH transmission occasion, and determining a third power control adjustment state corresponding to the third PUSCH transmission occasion.
14. The apparatus of claim 13 , wherein the third power control adjustment state is based on i) a TPC command in the DCI message for the third PUSCH transmission occasion and ii) the second power control adjustment state.
15. The apparatus of claim 14 , wherein the second power control adjustment state is not accumulative of a previous state, and wherein the second power control adjustment state is given by a TPC command absolute value indicated in the DCI message for the second PUSCH transmission occasion.
16. A system comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor, the memory storing instructions which, when executed by the at least one processor, cause the at least one processor to perform operations comprising:
receiving signaling that enables transmit power control (TPC) accumulation;
receiving downlink control information (DCI) messages corresponding to respective physical uplink shared channel (PUSCH) transmission occasions;
determining power control adjustment states for the PUSCH transmission occasions, wherein determining the power control adjustment states comprises selectively applying TPC accumulation to one or more of the power control adjustment states based on a determination that at least one of the PUSCH transmission occasions is out-of-order based on an arrival ordering of the DCI messages; and
transmitting in the PUSCH transmission occasions in accordance with the power control adjustment states, wherein:
a first PUSCH transmission occasion occurs before a second PUSCH transmission occasion,
the second PUSCH transmission occasion occurs before a third PUSCH transmission occasion,
the DCI message for the second PUSCH transmission occasion arrives before the first PUSCH transmission occasion,
the DCI message for the second PUSCH transmission occasion arrives before the DCI message for a third PUSCH transmission occasion, and
the DCI message for the first PUSCH transmission occasion arrives before the DCI message for the third PUSCH transmission occasion,
wherein determining the power control adjustment states comprises determining a first power control adjustment state corresponding to the first PUSCH transmission occasion, determining a second power control adjustment state corresponding to the second PUSCH transmission occasion, and determining a third power control adjustment state corresponding to the third PUSCH transmission occasion,
wherein the third power control adjustment state is based on i) a TPC command in the DCI message for the third PUSCH transmission occasion and ii) the second power control adjustment state, and
wherein the second power control adjustment state is not accumulative of a previous state, and wherein the second power control adjustment state is given by a TPC command absolute value indicated in the DCI message for the second PUSCH transmission occasion.
17. The system of claim 16 , wherein the system is a user equipment (UE).
18. The system of claim 16 wherein the system is a baseband processor.