VARIABLE RANDOM ACCESS CHANNEL CONTENTION RESOLUTION WINDOW IN A NON-TERRESTRIAL NETWORK
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit a physical uplink shared channel (PUSCH) message associated with a random access channel (RACH) procedure to a non-terrestrial network node. The UE may monitor a physical downlink control channel (PDCCH) for a contention resolution message associated with the RACH procedure during a contention resolution window. In some aspects, the UE may start to monitor the PDCCH a variable time period after the PUSCH message is transmitted. Numerous other aspects are provided.
1 . A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors coupled with the memory, the one or more processors configured to:
transmit a physical uplink shared channel (PUSCH) message associated with a random access channel (RACH) procedure to a non-terrestrial network node; and
monitor, after transmission of the PUSCH message and after a variable time period, a physical downlink control channel (PDCCH) for a contention resolution message during a contention resolution window, wherein the variable time period is based at least in part on:
a feeder link delay between a gateway and the non-terrestrial network node, and
a service link delay between the UE and the non-terrestrial network node.
2 . The UE of claim 1 , wherein the variable time period has a value that is based at least in part on the feeder link delay and the service link delay.
3 . The UE of claim 2 , wherein the value of the variable time period is based at least in part on a sum of the feeder link delay and the service link delay.
4 . The UE of claim 1 , wherein the variable time period has a value based at least in part on a random access response window start time.
5 . The UE of claim 4 , wherein the value of the variable time period is further based at least in part on a network configured value.
6 . The UE of claim 1 , wherein the feeder link delay is based at least in part on a deployment type.
7 . The UE of claim 1 , further comprising:
receiving one or more downlink messages, associated with the RACH procedure, comprising a network-determined value,
wherein monitoring the PDCCH is based at least in part on the network-determined value.
8 . The UE of claim 7 , wherein the variable time period comprises the network-determined value.
9 . A method of wireless communication performed by a user equipment (UE), comprising:
transmitting physical uplink shared channel (PUSCH) message associated with a random access channel (RACH) procedure to a non-terrestrial network node; and
monitoring, after transmission of the PUSCH message and after a variable time period, a physical downlink control channel (PDCCH) for a contention resolution message during a contention resolution window, wherein the variable time period is based at least in part on at least of:
a feeder link delay between a gateway and the non-terrestrial network node, or
a service link delay between the UE and the non-terrestrial network node.
10 . The method of claim 9 , wherein the variable time period has a value that is based at least in part on the feeder link delay and the service link delay.
11 . The method of claim 10 , wherein the value of the variable time period is based at least in part on a sum of the feeder link delay and the service link delay.
12 . The method of claim 9 , wherein the variable time period has a value based at least in part on a random access response window start time.
13 . The method of claim 9 , wherein the feeder link delay is based at least in part on a deployment type.
14 . The method of claim 9 , further comprising:
receiving one or more downlink messages, associated with the RACH procedure, comprising a network-determined value,
wherein monitoring the PDCCH is based at least in part on the network-determined value.
15 . The method of claim 14 , wherein the variable time period comprises the network-determined value.
16 . A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising:
one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the one or more processors to:
transmit a physical uplink shared channel (PUSCH) message associated with a random access channel (RACH) procedure to a non-terrestrial network node; and
monitor, after transmission of the PUSCH message and after a variable time period, a physical downlink control channel (PDCCH) for a contention resolution message during a contention resolution window, wherein the variable time period is based at least in part on at least one of:
a feeder link delay between a gateway and the non-terrestrial network node, or
a service link delay between the UE and the non-terrestrial network node.
17 . The non-transitory computer-readable medium of claim 16 , wherein the variable time period has a value that is based at least in part on the feeder link delay and the service link delay.
18 . The non-transitory computer-readable medium of claim 16 , wherein the variable time period has a value based at least in part on a random access response window start time.
19 . The non-transitory computer-readable medium of claim 16 , wherein the feeder link delay is based at least in part on a deployment type.
20 . The non-transitory computer-readable medium of claim 16 , wherein the one or more processors are further configured to:
receive one or more downlink messages, associated with the RACH procedure, comprising a network-determined value,
wherein the PDCCH is monitored based at least in part on the network-determined value.