Sidelink-assisted information transfer
This disclosure provides systems, methods, devices, and computer-readable media that support base station-assisted and unassisted sharing of particular information between neighboring user equipments (UEs). In a particular implementation, a method of wireless communication includes receiving, at a base station from a first UE, an information request corresponding to neighbor UEs of the first UE. The method also includes retrieving, at the base station from one or more serving UEs, corresponding information. The method further includes transmitting, from the base station to the first UE, an information package that includes the information corresponding to at least one of the one or more serving UEs. Other aspects and features are also claimed and described.
1. An apparatus configured for wireless communication, the apparatus comprising:
at least one processor; and
a memory coupled to the at least one processor,
wherein the at least one processor is configured to:
receive, at a base station from a first user equipment (UE), an information request corresponding to one or more neighbor UEs of the first UE;
identify, by the base station and based on the information request, a subset of UEs served by the base station that include the one or more neighbor UEs of the first UE;
transmit, from the base station to the subset of UEs, one or more requests for information corresponding to the one or more neighbor UEs of the first UE;
receive, at the base station from the subset of UEs, one or more responses, wherein the one or more responses include information responsive to the one or more requests for information; and
transmit, from the base station to the first UE, an information package that includes the information.
2. The apparatus of claim 1 , wherein the information comprises angle of arrival (AoA) data, angle of departure (AoD) data, zenith angle of arrival (ZoA) data, zenith angle of departure (ZoD) data, quasi co-location (QCL) data, Doppler spread data, Doppler shift data, delay profile data, delay spread data, or a combination thereof.
3. The apparatus of claim 1 , wherein, to receive the one or more responses, the at least one processor is configured to receive the one or more responses via a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), or a combination thereof, and wherein the one or more responses comprise one or more radio resource control (RRC) messages, one or more uplink control information (UCI) messages, or one or more medium access control (MAC) control elements (MAC CEs).
4. The apparatus of claim 1 , wherein the at least one processor is further configured to:
select, at the base station and based on geographic information, the subset of UEs from a plurality of UEs served by the base station; and
determine, at the base station, the geographic information based on communication beams corresponding to the subset of UEs and the first UE, trajectories of the subset of UEs and the first UE, or a combination thereof.
5. The apparatus of claim 1 , wherein the at least one processor is further configured to:
select, at the base station and based on geographic information, the subset of UEs from a plurality of UEs served by the base station; and
request, at the base station, the geographic information from a core network component, wherein the core network component comprises a location management function (LMF) or a position server.
6. The apparatus of claim 1 , wherein the at least one processor is further configured to:
select, at the base station and based on geographic information, the subset of UEs from a plurality of UEs served by the base station; and
request, at the base station, the geographic information from the subset of UEs.
7. The apparatus of claim 1 , wherein, to transmit the information package, the at least one processor is configured to transmit the information package via a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), or both, and wherein the information package comprises one or more radio resource control (RRC) messages, one or more downlink control information (DCI) messages, or a combination thereof.
8. The apparatus of claim 1 , wherein the at least one processor is further configured to:
receive, at the base station from the first UE, a negative-acknowledgement (NACK); and
reschedule, at the base station, transmission of the information package to the first UE.
9. The apparatus of claim 1 , wherein, to identify the subset of UEs, the at least one processor is configured to identify, by the base station and based on the information request, the subset of UEs based on geographic information determined by the base station from the information.
10. An apparatus configured for wireless communication, the apparatus comprising:
at least one processor; and
a memory coupled to the at least one processor,
wherein the at least one processor is configured to:
initiate transmission, from a first user equipment (UE) to a base station, of an information request corresponding to one or more neighbor UEs of the first UE; and
receive, at the first UE from the base station, an information package that includes information corresponding to the one or more neighbor UEs of the first UE, wherein the information is received by the base station in response to transmission of one or more requests for information corresponding to the one or more neighbor UEs of the first UE, the one or more neighbor UEs identified by the base station based on the information.
11. The apparatus of claim 10 , wherein the information comprises angle of arrival (AoA) data, angle of departure (AoD) data, zenith angle of arrival (ZoA) data, zenith angle of departure (ZoD) data, quasi co-location (QCL) data, Doppler spread data, Doppler shift data, delay profile data, delay spread data, or a combination thereof.
12. The apparatus of claim 10 , wherein the at least one processor is further configured to estimate, at the first UE, a position of the first UE based on the information included in the information package.
13. The apparatus of claim 10 , wherein the at least one processor is further configured to estimate, at the first UE, a speed of the first UE based on the information included in the information package.
14. The apparatus of claim 10 , wherein the at least one processor is further configured to predict, at the first UE, one or more candidate beams of the base station based on the information included in the information package.
15. The apparatus of claim 10 , wherein the at least one processor is further configured to predict, at the first UE, a candidate channel for communicating with the base station based on the information included in the information package.
16. An apparatus configured for wireless communication, the apparatus comprising:
at least one processor; and
a memory coupled to the at least one processor,
wherein the at least one processor is configured to:
receive, at a base station from a first user equipment (UE), an information request corresponding to one or more neighbor UEs of the first UE;
identify, at the base station and responsive to receipt of the information request, a subset of UEs served by the base station that include the one or more neighbor UEs of the first UE; and
transmit, from the base station to the first UE, a list of the one or more neighbor UEs to enable sidelink communications between the first UE and the one or more neighbor UEs.
17. The apparatus of claim 16 , wherein, to receive the information request, the at least one processor is configured to receive the information request via a physical uplink control channel (PUCCH) or one or more medium access control (MAC) control elements (MAC CEs), wherein the list is transmitted to the first UE via a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), or both, and wherein the list is included in a particular information element of one or more radio resource control (RRC) messages or a particular information element of one or more downlink control information (DCI) messages.
18. The apparatus of claim 16 , wherein, to identify the subset of UEs, the at least one processor is configured to identify the one or more neighbor UEs based on communication beams corresponding to the subset of UEs and the first UE, trajectories of the subset of UEs and the first UE, or a combination thereof.
19. The apparatus of claim 16 , wherein, to identify the subset of UEs, the at least one processor is further configured to:
request, at the base station, geographic information corresponding to the first UE and UEs served by the base station from a core network component; and
identify the subset of UEs based on the geographic information.
20. The apparatus of claim 16 , wherein, to identify the subset of UEs, the at least one processor is further configured to:
request geographic information from the UEs served by the base station; and
identify the subset of UEs based on the geographic information.
21. The apparatus of claim 16 , wherein the at least one processor is further configured to:
receive, at the base station from the first UE, a negative-acknowledgement (NACK); and
reschedule, at the base station, transmission of the list to the first UE.
22. An apparatus configured for wireless communication, the apparatus comprising:
at least one processor; and
a memory coupled to the at least one processor,
wherein the at least one processor is configured to:
initiate transmission, from a first user equipment (UE) to a base station, of an information request corresponding to one or more neighbor UEs of the first UE, wherein the information is received by the base station in response to transmission of requests to the one or more neighbor UEs identified by the base station based on the information;
receive, at the first UE from the base station, a list of the one or more neighbor UEs of the first UE; and
establish, at the first UE, one or more sidelink connections with the one or more neighbor UEs.
23. The apparatus of claim 22 , wherein, to transmit the information request, the at least one processor is configured to transmit the information request via a physical uplink control channel (PUCCH), and wherein, to receive the list, the at least one processor is configured to receive the list via a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), or both.
24. The apparatus of claim 22 , wherein the at least one processor is further configured to:
initiate transmission, from the first UE to the one or more neighbor UEs via the one or more sidelink connections, of one or more information requests; and
receive, at the first UE from the one or more neighbor UEs via the one or more sidelink connections, information corresponding to the one or more information requests.
25. The apparatus of claim 22 , wherein the information comprises angle of arrival (AoA) data, angle of departure (AoD) data, zenith angle of arrival (ZoA) data, zenith angle of departure (ZoD) data, quasi co-location (QCL) data, Doppler spread data, Doppler shift data, delay profile data, delay spread data, or a combination thereof.
26. The apparatus of claim 22 , wherein the at least one processor is further configured to estimate, at the first UE, a position of the first UE based on the information received from the one or more neighbor UEs.
27. The apparatus of claim 22 , wherein the at least one processor is further configured to estimate, at the first UE, a speed of the first UE based on the information received from the one or more neighbor UEs.
28. The apparatus of claim 22 , wherein the at least one processor is further configured to predict, at the first UE, a candidate channel for communicating with the base station based on the information received from the one or more neighbor UEs.
29. The apparatus of claim 22 , wherein the at least one processor is further configured to establish the one or more sidelink connections without assistance from the base station.