Scheduling uplink transmissions using relay devices
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a relay device may receive, from a first user equipment (UE) on a sidelink channel, a buffer status report. Accordingly, the relay device may receive, from a base station, a grant of an uplink resource based at least in part on determining a priority of data associated with the buffer status report. Additionally, the relay device may transmit, to the base station, the buffer status report based at least in part on receiving the grant of the uplink resource. Numerous other aspects are provided.
1. A first user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory, the one or more processors configured to:
transmit an uplink request based at least in part on a priority of data, wherein a priority of a logical channel in the uplink request indicates the priority of the data associated with the uplink request, and wherein the uplink request includes at least one of a scheduling request, control information, or a combination thereof;
receive a grant of a sidelink resource based at least in part on transmitting the uplink request; and
transmit, to a relay device on a sidelink channel, a buffer status report associated with the data based at least in part on receiving the grant of the sidelink resource.
2. The first UE of claim 1 , wherein the first UE shares a medium access control (MAC) layer with the relay device.
3. The first UE of claim 1 , wherein the first UE uses a first medium access control (MAC) layer that is distinct from a second MAC layer shared by the relay device and at least one second UE.
4. The first UE of claim 1 , wherein the first UE shares a radio network temporary identifier (RNTI) with the relay device.
5. The first UE of claim 1 , wherein the first UE uses a first radio network temporary identifier (RNTI) that is distinct from a second RNTI shared by the relay device and at least one second UE.
6. The first UE of claim 1 , wherein the one or more processors are further configured to:
receive a retransmission of the grant of the sidelink resource; and
retransmit, to the relay device, the buffer status report.
7. A relay device for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory, the one or more processors configured to:
receive, from a first user equipment (UE) on a sidelink channel, a buffer status report;
transmit, to a network entity, a scheduling request for a grant of an uplink resource based at least in part on determining a priority of data associated with the buffer status report, the priority of the data being based at least in part on a priority of a logical channel in the buffer status report; and
transmit, to the network entity, the buffer status report based at least in part on receiving the grant of the uplink resource.
8. The relay device of claim 7 , wherein the relay device shares a medium access control (MAC) layer on the sidelink channel with the first UE.
9. The relay device of claim 7 , wherein the relay device uses a first medium access control (MAC) layer, with the first UE, that is distinct from a second MAC layer shared by the relay device and at least one second UE.
10. The relay device of claim 7 , wherein the relay device shares a radio network temporary identifier (RNTI) with the first UE.
11. The relay device of claim 7 , wherein the relay device uses a first radio network temporary identifier (RNTI), with the first UE, that is distinct from a second RNTI shared by the relay device and at least one second UE.
12. The relay device of claim 7 , wherein the one or more processors are further configured to:
receive, from the first UE and on the sidelink channel, a scheduling request,
wherein the buffer status report is received based at least in part on receiving the scheduling request.
13. The relay device of claim 12 , wherein the one or more processors are further configured to:
transmit, to the first UE, a grant of a sidelink resource based at least in part on receiving the scheduling request,
wherein the buffer status report is received based at least in part on transmitting the grant of the sidelink resource.
14. The relay device of claim 13 , wherein the one or more processors are further configured to:
receive, from the network entity, the grant of the sidelink resource.
15. The relay device of claim 14 , wherein the one or more processors are further configured to:
transmit, to the network entity, a request for the sidelink resource,
wherein the grant of the sidelink resource is received, from the network entity, based at least in part on transmitting the request for the sidelink resource.
16. The relay device of claim 15 , wherein the one or more processors are further configured to:
transmit, to the network entity, a scheduling request for the request for the sidelink resource; and
receive, from the network entity, an uplink grant for the request for the sidelink resource,
wherein the request for the sidelink resource is transmitted, to the network entity, based at least in part on receiving the uplink grant.
17. The relay device of claim 7 , wherein the one or more processors are further configured to:
receive, from the first UE and on the sidelink channel, control information,
wherein the buffer status report is received based at least in part on receiving the control information.
18. The relay device of claim 17 , wherein the one or more processors are further configured to:
transmit, to the first UE, a grant of a sidelink resource based at least in part on receiving the control information,
wherein the buffer status report is received based at least in part on transmitting the grant of the sidelink resource.
19. The relay device of claim 18 , wherein the one or more processors are further configured to:
receive, from the network entity, the grant of the sidelink resource.
20. The relay device of claim 19 , wherein the one or more processors are further configured to:
transmit, to the network entity, a request for the sidelink resource,
wherein the grant of the sidelink resource is received, from the network entity, based at least in part on transmitting the request for the sidelink resource.
21. The relay device of claim 20 , wherein the one or more processors are further configured to:
transmit, to the network entity, a scheduling request for the request for the sidelink resource; and
receive, from the network entity, an uplink grant for the request for the sidelink resource,
wherein the request for the sidelink resource is transmitted, to the network entity, based at least in part on receiving the uplink grant.
22. The relay device of claim 20 , wherein the request for the sidelink resource is transmitted based at least in part on determination of the priority of the data associated with the control information.
23. The relay device of claim 22 , wherein the request for the sidelink resource is transmitted on a physical uplink control channel (PUCCH), wherein the PUCCH is selected based at least in part on the priority of the logical channel in the control information.
24. The relay device of claim 7 , wherein the one or more processors are further configured to:
transmit, to the network entity, a negative-acknowledgment (NACK) signal based at least in part on failing to receive information from the first UE,
wherein the information is received based at least in part on transmitting the NACK signal.
25. The relay device of claim 24 , wherein the relay device fails to receive the information based at least in part on transmitting a grant of a sidelink resource to the first UE.
26. The relay device of claim 25 , wherein the one or more processors are further configured to:
retransmit, to the first UE, the grant of the sidelink resource.
27. The relay device of claim 25 , wherein the one or more processors are further configured to:
receive, from the network entity, a retransmission of the grant of the sidelink resource based at least in part on transmitting the NACK signal.
28. The relay device of claim 7 , wherein the one or more processors are further configured to:
transmit, to the network entity, an acknowledgment (ACK) signal based at least in part on receiving information from the first UE,
wherein the grant of the uplink resource is received based at least in part on transmitting the ACK signal.
29. A network entity for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory, the one or more processors configured to:
receive an uplink request, wherein a priority of a logical channel in the uplink request indicates a priority of data associated with the uplink request, and wherein the uplink request includes at least one of a scheduling request, control information, or a combination thereof;
transmit a grant of a sidelink resource based at least in part on the priority of the data associated with the uplink request; and
receive, from a relay device, a buffer status report associated with a first user equipment (UE), based at least in part on transmitting the grant of the sidelink resource, the buffer status report being associated with the data.
30. A method of wireless communication performed by a relay device, comprising:
receiving, from a first user equipment (UE) on a sidelink channel, a buffer status report;
transmitting, to a network entity, a scheduling request for a grant of an uplink resource based at least in part on determining a priority of data associated with the buffer status report, the priority of the data being based at least in part on a priority of a logical channel in the buffer status report; and
transmitting, to the network entity, the buffer status report based at least in part on receiving the grant of the uplink resource.