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 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; and transmitting 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. Determining the power control adjustment states can include 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, where the first PUSCH transmission occasion occurs before the second PUSCH transmission occasion.
1. A method comprising:
receiving, by a user equipment (UE), downlink control information (DCI) messages corresponding to respective physical uplink shared channel (PUSCH) transmission occasions in a sequence;
determining, by the UE, power control adjustment states for the PUSCH transmission occasions, wherein determining the power control adjustment states comprises determining that a first PUSCH transmission occasion, a second PUSCH transmission occasion, and a third PUSCH transmission occasion occur out-of-order with respect to one another based on an arrival ordering of the DCI messages, wherein the first PUSCH transmission occasion occurs immediately before the second PUSCH transmission occasion in the sequence, wherein the second PUSCH transmission occurs immediately before the third PUSCH transmission in the sequence;
where 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, and
wherein the third power control adjustment state is based on an addition of the first power control adjustment state, a TPC command value indicated in the DCI for the second PUSCH transmission occasion, and a TPC command value indicated in the DCI for the third PUSCH transmission occasion; and
transmitting, by the UE, in the PUSCH transmission occasions in accordance with the power control adjustment states.
2. The method of claim 1 , comprising:
receiving, by the UE, a higher layer signaling that enables transmit power control (TPC) accumulation.
3. The method of claim 1 , wherein determining the power control adjustment states comprises:
when the first PUSCH transmission occasion occurs out-of-order with respect to the second PUSCH transmission occasion, determining whether to use the first power control adjustment state corresponding to the first PUSCH transmission occasion in determining the second power control adjustment state corresponding to the second PUSCH transmission occasion.
4. The method of claim 1 , wherein:
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 the third PUSCH transmission occasion,
the DCI message for the first PUSCH transmission occasion arrives before the DCI message for the third PUSCH transmission occasion,
the first PUSCH transmission occasion ends before the second and third PUSCH transmission occasions, and
the second PUSCH transmission occasion ends before the third PUSCH transmission occasion.
5. A user equipment (UE) comprising:
one or more processors;
a transceiver; and
a memory storing instructions that, when executed by the one or more processors, cause the one or more processors to perform operations comprising:
receiving, via the transceiver, downlink control information (DCI) messages corresponding to respective physical uplink shared channel (PUSCH) transmission occasions in a sequence;
determining power control adjustment states for the PUSCH transmission occasions, wherein determining the power control adjustment states comprises determining that a first PUSCH transmission occasion, a second PUSCH transmission occasion, and a third PUSCH transmission occasion occur out-of-order with respect to one another based on an arrival ordering of the DCI messages, wherein the first PUSCH transmission occasion occurs immediately before the second PUSCH transmission occasion in the sequence, wherein the second PUSCH transmission occurs immediately before the third PUSCH transmission in the sequence,
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, and
wherein the third power control adjustment state is based on an addition of the first power control adjustment state, a TPC command value indicated in the DCI for the second PUSCH transmission occasion, and a TPC command value indicated in the DCI for the third PUSCH transmission occasion; and
transmitting, via the transceiver, in the PUSCH transmission occasions in accordance with the power control adjustment states.
6. The UE of claim 5 , wherein the operations comprise:
receiving a higher layer signaling that enables transmit power control (TPC) accumulation.
7. The UE of claim 5 , wherein determining the power control adjustment states comprises:
when the first PUSCH transmission occasion occurs out-of-order with respect to the second PUSCH transmission occasion, determining whether to use the first power control adjustment state corresponding to the first PUSCH transmission occasion in determining the second power control adjustment state corresponding to the second PUSCH transmission occasion.
8. The UE of claim 5 , wherein:
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 the third PUSCH transmission occasion,
the DCI message for the first PUSCH transmission occasion arrives before the DCI message for the third PUSCH transmission occasion,
the first PUSCH transmission occasion ends before the second and third PUSCH transmission occasions, and
the second PUSCH transmission occasion ends before the third PUSCH transmission occasion.
9. An apparatus comprising:
circuitry configured to receive downlink control information (DCI) messages corresponding to respective physical uplink shared channel (PUSCH) transmission occasions in a sequence and to 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 determining that a first PUSCH transmission occasion, a second PUSCH transmission occasion, and a third PUSCH transmission occasion occur out-of-order with respect to one another based on an arrival ordering of the DCI messages, wherein the first PUSCH transmission occasion occurs immediately before the second PUSCH transmission occasion in the sequence, wherein the second PUSCH transmission occurs immediately before the third PUSCH transmission in the sequence;
where 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, and
wherein the third power control adjustment state is based on an addition of the first power control adjustment state, a TPC command value indicated in the DCI for the second PUSCH transmission occasion, and a TPC command value indicated in the DCI for the third PUSCH transmission occasion.
10. The apparatus of claim 9 , wherein the operations comprise:
receiving a higher layer signaling that enables transmit power control (TPC) accumulation.
11. The apparatus of claim 9 , wherein determining the power control adjustment states comprises:
when the first PUSCH transmission occasion occurs out-of-order with respect to the second PUSCH transmission occasion, determining whether to use the first power control adjustment state corresponding to the first PUSCH transmission occasion in determining the second power control adjustment state corresponding to the second PUSCH transmission occasion.
12. The apparatus of claim 9 , wherein:
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 the third PUSCH transmission occasion,
the DCI message for the first PUSCH transmission occasion arrives before the DCI message for the third PUSCH transmission occasion,
the first PUSCH transmission occasion ends before the second and third PUSCH transmission occasions, and
the second PUSCH transmission occasion ends before the third PUSCH transmission occasion.