Sidelink assisted multi-link communication
Aspects described herein relate to sidelink-assisted virtual multi-link. In one aspect, for example, a relay node may serve as an additional virtual antenna panel for a UE by receiving downlink data from a base station via an access link, or receiving uplink data from the UE via a sidelink. The relay node may forward the downlink data to the UE via sidelink, or the uplink data to the base station via the access link. In another aspect, a base station may determine, for a UE, quasi-colocation (QCL) information and a grant for one or both of one or more access link resources or one or more sidelink resources. The base station may further transmit, to the UE, the QCL information and the grant on a downlink communication channel.
1. A method of wireless communications by a relay node, comprising:
receiving, from a base station and via an aggregated slot on a physical downlink control channel (PDCCH), a semi-persistent or dynamic grant for one or more access link resources and one or more sidelink resources that are offset in a time domain, wherein the relay node represents a virtual antenna panel for a user equipment (UE) having a single antenna panel to facilitate multi-link communication between the base station and the UE;
receiving data from at least one of:
the base station on an access link using the one or more access link resources, or the UE on a sidelink using the one or more sidelink resources; and
forwarding the data to at least one of:
the UE using the one or more sidelink resources when received from the base station on the access link using the one or more access link resources, or
the base station using the one or more access link resources when received from the UE on the sidelink using the one or more sidelink resources.
2. The method of claim 1 , further comprising:
determining whether data received on the access link has been successfully decoded;
forwarding the data based on determining that the data received on the access link has been successfully decoded; and
forgoing forwarding of the data based on determining that the data received on the access link has not been successfully decoded.
3. The method of claim 2 , further comprising transmitting a failure indication within sidelink control information to at least one of the UE or the base station.
4. The method of claim 1 , wherein the one or more sidelink resources include at least one resource for sidelink control information.
5. The method of claim 1 , wherein the one or more access link resources facilitate communication on a cellular (Uu) interface.
6. The method of claim 1 , wherein the one or more sidelink resources facilitate communication on a ProSe sidelink (PC5) interface.
7. A relay node device for wireless communication, comprising:
a memory configured to store instructions; and
at least one processor communicatively coupled with the memory, wherein the at least one processor is configured to:
receive, from a base station and via an aggregated slot on a physical downlink control channel (PDCCH), a semi-persistent or dynamic grant for one or more access link resources and one or more sidelink resources that are offset in a time domain, wherein the relay node represents a virtual antenna panel for a user equipment (UE) having a single antenna panel to facilitate multi-link communication between the base station and the UE;
receive data from at least one of:
the base station on an access link using the one or more access link resources, or
the UE on a sidelink using the one or more sidelink resources; and
forwarding the data to at least one of:
the UE using the one or more sidelink resources when received from the base station on the access link using the one or more access link resources, or
the base station using the one or more access link resources when received from the UE on the sidelink using the one or more sidelink resources.
8. The relay node of claim 7 , wherein the processor is further to:
determine whether data received on the access link has been successfully decoded;
forward the data based on determining that the data received on the access link has been successfully decoded; and
forgo forwarding of the data based on determining that the data received on the access link has not been successfully decoded.
9. The relay node of claim 8 , wherein the processor is further to transmit a failure indication within sidelink control information to at least one of the UE or the base station.
10. The relay node of claim 7 , wherein the one or more sidelink resources include at least one resource for sidelink control information.
11. The relay node of claim 7 , wherein the one or more access link resources facilitate communication on a cellular (Uu) interface.
12. The relay node of claim 7 , wherein the one or more sidelink resources facilitate communication on a ProSe sidelink (PC5) interface.
13. A relay node device for wireless communication, comprising:
means for receiving, from a base station and via an aggregated slot on a physical downlink control channel (PDCCH), a semi-persistent or dynamic grant for one or more access link resources and one or more sidelink resources that are offset in a time domain, wherein the relay node represents a virtual antenna panel for a user equipment (UE) having a single antenna panel to facilitate multi-link communication between the base station and the UE;
means for receiving data from at least one of:
the base station on an access link using the one or more access link resources, or
the UE on a sidelink using the one or more sidelink resources; and forwarding the data to at least one of:
the UE using the one or more sidelink resources when received from the base station on the access link using the one or more access link resources, or
the base station using the one or more access link resources when received from the UE on the sidelink using the one or more sidelink resources.
14. The relay node device of claim 13 , further comprising:
means for determining whether data received on the access link has been successfully decoded;
means for forwarding the data based on determining that the data received on the access link has been successfully decoded; and
means for forgoing forwarding of the data based on determining that the data received on the access link has not been successfully decoded.
15. The relay node device of claim 14 , further comprising means for transmitting a failure indication within sidelink control information to at least one of the UE or the base station.
16. The method of claim 13 , wherein the one or more sidelink resources include at least one resource for sidelink control information.
17. The relay node device of claim 13 , wherein the one or more access link resources facilitate communication on a cellular (Uu) interface.
18. The relay node device of claim 13 , wherein the one or more sidelink resources facilitate communication on a ProSe sidelink (PC5) interface.