Beam-based relay node switch
Techniques for beam-based relay node switch. An example method of wireless communication by a first wireless node generally includes relaying wireless communications between a user equipment (UE) ( 120, 120 a - y ) and a network entity; transmitting, to one or more second wireless nodes, relay request signals via a plurality of beams ( 402 a - d, 602 a - d, 604 a - b, 706 a - b ) at relay request signal occasions ( 1, 2, 3 ), wherein each of the relay request signals indicates a request to switch relay services of the UE ( 120, 120 a - y ) from the first wireless node to the one or more second wireless nodes; and switching the relay services of the UE ( 120, 120 a - y ) to at least one of the one or more second wireless nodes.
1. A method of wireless communication by a first wireless node, comprising:
relaying wireless communications between a user equipment (UE) and a second wireless node;
transmitting, to one or more third wireless nodes, relay request signals via a plurality of beams at relay request signal occasions, wherein each of the relay request signals indicates a request to switch relay services of the UE from the first wireless node to the one or more third wireless nodes; and
switching the relay services of the UE to at least one of the one or more third wireless nodes.
2. The method of claim 1 , wherein transmitting the relay request signals comprises transmitting each of the relay request signals via a different beam of the plurality of beams at a different relay request signal occasion of the relay request signal occasions.
3. The method of claim 1 , wherein each of the plurality of beams corresponds to a different transmit direction and a different relay request occasion, wherein the second wireless node includes a network entity or another UE.
4. The method of claim 1 , wherein the relay request signals include one or more wake-up signals.
5. The method of claim 1 , wherein switching the relay services further comprises receiving, from at least one of the one or more third wireless nodes, one or more acknowledgement signals at one or more acknowledgement signal occasions.
6. The method of claim 5 , wherein each of the acknowledgement signal occasions is associated with one of the relay request signal occasions respectively.
7. The method of claim 5 , wherein switching the relay services further comprises:
transmitting, to the at least one of the one or more third wireless nodes, one or more control signals via at least one of the plurality of beams at one or more control signal occasions; and
wherein each of the control signals indicates to the at least one of the one or more third wireless nodes to transmit one or more discovery signals at one or more discovery signal occasions.
8. The method of claim 7 , wherein each of the control signal occasions is associated with one of the relay request signal occasions respectively or associated with one of the acknowledgement signal occasions respectively.
9. The method of claim 8 , wherein each of the at least one of the plurality of beams corresponds to one of the plurality of beams associated with one of the relay request signals.
10. The method of claim 7 , wherein each of the discovery signal occasions is associated with one of the relay request signal occasions respectively or associated with one of the control signal occasions respectively.
11. The method of claim 7 , further comprising:
identifying the one or more acknowledgement signal occasions when the one or more acknowledgement signals are received;
determining the one or more control signal occasions associated with the identified acknowledgement signal occasions; and
wherein transmitting the one or more control signals comprises transmitting the one or more control signals via the at least one of the plurality of beams at the one or more determined control signal occasions.
12. The method of claim 1 , further comprising transmitting, to the UE, a signal indicating a measurement configuration for the UE to discover the one or more third wireless nodes via one or more discovery signals, wherein the measurement configuration indicates one or more discovery signal occasions for receiving the one or more discovery signals.
13. The method of claim 1 , further comprising configuring at least one of the one or more third wireless nodes with one or more associations between the relay request signal occasions and at least one of acknowledgement signal occasions, control signal occasions, discovery signal occasions, or the plurality of beams.
14. The method of claim 1 , further comprising receiving, from a network entity, a configuration indicating one or more associations between the relay request signal occasions and at least one of acknowledgement signal occasions, control signal occasions, or discovery signal occasions.
15. The method of claim 1 , further comprising configuring one or more associations between the relay request signal occasions and at least one of acknowledgement signal occasions, control signal occasions, discovery signal occasions, or the plurality of beams.
16. The method of claim 15 , wherein configuring comprises:
receiving, from a network entity, a configuration indicating the one or more associations; and
configuring the associations based on the configuration.
17. A method of wireless communication by a second wireless node, comprising:
receiving, from a first wireless node, one or more relay request signals via one or more beams at one or more relay request signal occasions, wherein each of the relay request signals indicates a request to switch wireless communication relay services of a user equipment (UE) from the first wireless node to the second wireless node;
switching wireless communication relay services of the UE to the second wireless node; and
after switching the wireless communication relay services, relaying communications between the UE and a third wireless node.
18. The method of claim 17 , wherein receiving the relay request signals comprises receiving each of the relay request signals via a different beam of the one or more beams at a different relay request signal occasion of the one or more relay request signal occasions.
19. The method of claim 17 , wherein each of the one or more beams corresponds to a different transmit direction and different relay request occasion, wherein the second wireless node includes a network entity or another user equipment.
20. The method of claim 17 , wherein the relay request signals include one or more wake-up signals.
21. The method of claim 17 , wherein switching the relay services further comprises transmitting, to the first wireless node, an acknowledgement signal at an acknowledgement signal occasion.
22. The method of claim 21 , wherein the acknowledgement signal occasion is associated with one of the relay request signal occasions.
23. The method of claim 21 , wherein transmitting the acknowledgement signal is based on properties of one of the relay request signals received at one of the relay request signal occasions associated with the acknowledgement signal occasion.
24. The method of claim 21 , wherein switching the relay services further comprises:
receiving, from the first wireless node, one or more control signals via at least one of the one or more beams at one or more control signal occasions;
wherein each of the control signal occasions is associated with one of the acknowledgement signal occasions and indicates to the second wireless nodes to transmit one or more discovery signals.
25. The method of claim 24 , wherein each of the control signal occasions is associated with at least one of the relay request signal occasions or associated with at least one of the acknowledgement signal occasions.
26. The method of claim 24 , wherein each of the at least one of the one or more beams corresponds to one of the one or more beams associated with the relay request signals.
27. The method of claim 24 , wherein switching the relay services further comprises:
transmitting, to the UE, one or more discovery signals at a discovery signal occasion;
wherein each of the discovery signals is associated with at least one of the control signals and indicates to the UE to switch relay services.
28. The method of claim 27 , wherein the discovery signal occasion is associated with one of the relay request signal occasions or associated with one of the control signal occasions.
29. A method of wireless communication by a user equipment (UE), comprising:
communicating with a first wireless node via first wireless communications with a second wireless node;
receiving, from one or more third wireless nodes, one or more discovery signals at one or more discovery signal occasions;
switching from the second wireless node to at least one of the third wireless nodes to communicate with the first wireless node based on the received discovery signals; and
communicating with the first wireless node via second wireless communications with at least one of the third wireless nodes.
30. The method of claim 29 , further comprising:
receiving, from the second wireless node, a signal indicating a measurement configuration for the UE to discover the one or more third wireless nodes via the one or more discovery signals, wherein the measurement configuration indicates the one or more discovery signal occasions for receiving the one or more discovery signals; and
wherein receiving the one or more discovery signals comprises receiving the one or more discovery signal based on the measurement configuration.
31. A method of wireless communication by a network entity, comprising:
communicating with a user equipment (UE) via first wireless communications with a first wireless node;
configuring the first wireless node with one or more associations between relay request signal occasions and at least one of acknowledgement signal occasions, control signal occasions, discovery signal occasions, or a plurality of beams used to switch relay services of the UE from the first wireless node to one or more second wireless nodes; and
communicating with the UE via second wireless communications with the one or more second wireless nodes.
32. The method of claim 31 , further comprising:
configuring the one or more second wireless nodes with the one or more associations, wherein configuring the one or more second wireless nodes comprises transmitting, to the one or more second wireless nodes, a signal indicating the one or more associations; and
wherein configuring the first wireless node comprises transmitting, to the first wireless node, a signal indicating the one or more associations.