Techniques for indicating physical uplink control channel repetition for random access procedures
Methods, systems, and devices for wireless communication are described. A communication device, such as a user equipment (UE) may receive, from a network entity, a random access message of a random access procedure, which may be a two-step random access channel (RACH) procedure or a four-step RACH procedure. In some examples, the UE may receive the PUCCH repetition parameter via a physical downlink control channel (PDCCH). Alternatively, the UE may receive the PUCCH repetition parameter via a physical downlink shared channel (PDSCH). The UE may determine a physical uplink control channel (PUCCH) repetition parameter based on the received random access message, and may transmit, to the network entity, feedback information on a PUCCH based on the determined PUCCH repetition parameter.
1. A method for wireless communication at a user equipment (UE), comprising:
receiving, from a network entity, a random access message of a random access procedure, the random access message including an indication of a physical uplink control channel repetition parameter;
determining the physical uplink control channel repetition parameter based at least in part on the received random access message including the indication; and
transmitting, to the network entity, feedback information associated with the received random access message on a physical uplink control channel based at least in part on the determined physical uplink control channel repetition parameter.
2. The method of claim 1 , further comprising:
receiving the random access message including the indication of the physical uplink control channel repetition parameter on a physical downlink shared channel.
3. The method of claim 2 , wherein the random access procedure includes a two-step random access procedure and the random access message includes a message B associated with the two-step random access procedure.
4. The method of claim 2 , wherein the random access procedure includes a four-step random access procedure and the random access message includes a message 4 associated with the four-step random access procedure.
5. The method of claim 1 , further comprising:
receiving the random access message including the indication of the physical uplink control channel repetition parameter on a physical downlink control channel.
6. The method of claim 5 , wherein the random access procedure includes a two-step random access procedure and the random access message includes a message B associated with the two-step random access procedure.
7. The method of claim 5 , wherein the random access procedure includes a four-step random access procedure and the random access message includes a message 4 associated with the four-step random access procedure.
8. The method of claim 5 , further comprising:
receiving downlink control information on the physical downlink control channel during the random access procedure, the downlink control information including a downlink control information bitfield indicating the physical uplink control channel repetition parameter.
9. The method of claim 5 , further comprising:
determining the physical uplink control channel repetition parameter based at least in part on one or more of an aggregation level associated with the physical downlink control channel or a control channel element location associated with the physical downlink control channel.
10. The method of claim 5 , further comprising:
determining the physical uplink control channel repetition parameter based at least in part on a physical uplink control channel resource indicator bitfield.
11. The method of claim 1 , further comprising:
receiving, from the network entity, a system information block including system information indicating a physical uplink control channel repetition configuration including a set of physical uplink control channel repetition parameters.
12. The method of claim 11 , further comprising:
selecting the physical uplink control channel repetition parameter from the set of physical uplink control channel repetition parameters based at least in part on the received random access message, wherein the system information includes remaining minimum system information.
13. The method of claim 1 , wherein the physical uplink control channel repetition parameter corresponds to a physical uplink control channel format, a frequency range, a subcarrier spacing, or a combination thereof.
14. The method of claim 1 , wherein:
the random access procedure includes a two-step random access procedure or a four-step random access procedure; and
the feedback information includes a hybrid automatic repeat request acknowledgment.
15. A method for wireless communication at a network entity, comprising:
transmitting, to a user equipment (UE), a random access message of a random access procedure, the random access message including an indication of a physical uplink control channel repetition parameter; and
receiving, from the UE, feedback information associated with the random access message via a physical uplink control channel based at least in part on the physical uplink control channel repetition parameter.
16. The method of claim 15 , further comprising:
transmitting the random access message including the indication of the physical uplink control channel repetition parameter on a physical downlink shared channel.
17. The method of claim 16 , wherein the random access procedure includes a two-step random access procedure and the random access message includes a message B associated with the two-step random access procedure.
18. The method of claim 16 , wherein the random access procedure includes a four-step random access procedure and the random access message includes a message 4 associated with the four-step random access procedure.
19. The method of claim 15 , further comprising:
transmitting the random access message including the indication of the physical uplink control channel repetition parameter on a physical downlink control channel.
20. The method of claim 19 , wherein the random access procedure includes a two-step random access procedure and the random access message includes a message B associated with the two-step random access procedure.
21. The method of claim 19 , wherein the random access procedure includes a four-step random access procedure and the random access message includes a message 4 associated with the four-step random access procedure.
22. The method of claim 19 , further comprising:
transmitting downlink control information on the physical downlink control channel during the random access procedure, the downlink control information including a downlink control information bitfield indicating the physical uplink control channel repetition parameter.
23. The method of claim 15 , further comprising:
transmitting, to the UE, a system information block including system information indicating a physical uplink control channel repetition configuration including a set of physical uplink control channel repetition parameters including the physical uplink control channel repetition parameter, wherein the system information includes remaining minimum system information.
24. The method of claim 15 , wherein the physical uplink control channel repetition parameter corresponds to a physical uplink control channel format, a frequency range, a subcarrier spacing, or a combination thereof.
25. The method of claim 15 , wherein:
the random access procedure includes a two-step random access procedure or a four-step random access procedure; and
the feedback information includes a hybrid automatic repeat request acknowledgment.
26. An apparatus for wireless communication at a user equipment (UE), comprising:
a processor;
memory coupled with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
receive, from a network entity, a random access message of a random access procedure, the random access message including an indication of a physical uplink control channel repetition parameter;
determine the physical uplink control channel repetition parameter based at least in part on the received random access message including the indication; and
transmit, to the network entity, feedback information associated with the received random access message on a physical uplink control channel based at least in part on the determined physical uplink control channel repetition parameter.
27. An apparatus for wireless communication at a network entity, comprising:
a processor;
memory coupled with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
transmit, to a user equipment (UE), a random access message of a random access procedure, the random access message including an indication of a physical uplink control channel repetition parameter; and
receive, from the UE, feedback information associated with the random access message via a physical uplink control channel based at least in part on the physical uplink control channel repetition parameter.