# US 2021/0243752 A1 · Sidelink-assisted information transfer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243752 A1 - Document ID: US20210243752A1 - Status: Published application - Kind: A1 - Application number: 17/159,502 - Filed: 2021-01-27 - Published: 2021-08-05 - Earliest claimed: 2020-01-31 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Jingchao Bao; Sony Akkarakaran; Tao Luo; Taesang Yoo; Hamed Pezeshki; Arumugam Chendamarai Kannan; Mahmoud Taherzadeh Boroujeni - Web page: https://patentgrep.com/patent/US20210243752A1 ## CPC - H04W 72/51: based on terminal or device properties - H04B 7/088: {using beam selection} - H04W 72/20: Control channels or signalling for resource management - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION ## Abstract 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. ## Claims ### Claim 1 A method of wireless communication, the method comprising: receiving, at a base station from a first user equipment (UE), an information request corresponding to neighbor UEs of the first UE; retrieving, at the base station from one or more serving UEs, corresponding information; and 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. ### Claim 2 (depends on 1) The method of claim 1, wherein the information comprises beam selection data, angle of arrival (AoA) data, angle of departure (AoD) data, zenith angle of arrival (ZoA) data, zenith angle of departure (ZoD) data, position data, velocity data, channel information, quasi co-location (QCL) data, Doppler spread data, Doppler shift data, delay profile data, delay spread data, or a combination thereof. ### Claim 3 (depends on 1) The method of claim 1, wherein retrieving the corresponding information comprises: transmitting, from the base station to the one or more serving UEs, one or more requests for the information; and receiving, at the base station from the one or more serving UEs, one or more responses including the information. ### Claim 4 (depends on 3) The method of claim 3, wherein the one or more responses are received 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 media access control control elements (MAC CEs). ### Claim 5 (depends on 1) The method of claim 1, further comprising: selecting, at the base station, a subset of UEs of the one or more serving UEs based on geographic information; and inferring, at the base station, the geographic information based on communication beams corresponding to the one or more serving UEs and the first UE, trajectories of the one or more serving UEs and the first UE, or a combination thereof. ### Claim 6 (depends on 1) The method of claim 1, further comprising: selecting, at the base station, a subset of UEs of the one or more serving UEs based on geographic information; and requesting, 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. ### Claim 7 (depends on 1) The method of claim 1, further comprising: selecting, at the base station, a subset of UEs of the one or more serving UEs based on geographic information; and requesting, at the base station, the geographic information from the one or more serving UEs. ### Claim 8 (depends on 1) The method of claim 1, wherein the information package is transmitted 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. ### Claim 9 (depends on 1) The method of claim 1, further comprising: receiving, at the base station from the first UE, a negative-acknowledgement (NACK); and rescheduling, at the base station, transmission of the information package to the first UE. ### Claim 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 neighbor UEs of the first UE; and receive, at the first UE from the base station, an information package that includes information corresponding to one or more neighbor UEs of the first UE. ### Claim 11 (depends on 10) The apparatus of claim 10, wherein the information comprises beam selection data, angle of arrival (AoA) data, angle of departure (AoD) data, zenith angle of arrival (ZoA) data, zenith angle of departure (ZoD) data, position data, velocity data, channel information, quasi co-location (QCL) data, Doppler spread data, Doppler shift data, delay profile data, delay spread data, or a combination thereof. ### Claim 12 (depends on 10) The apparatus of claim 10, wherein the information package is received 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 (RRC) messages, one or more downlink control information (DCI) messages, or a combination thereof. ### Claim 13 (depends on 10) 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. ### Claim 14 (depends on 10) 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. ### Claim 15 (depends on 10) 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. ### Claim 16 (depends on 10) 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. ### Claim 17 A method of wireless communication, the method comprising: receiving, at a base station from a first user equipment (UE), an information request corresponding to neighbor UEs of the first UE; determining, at the base station, one or more neighbor UEs of the first UE from one or more serving UEs of the base station responsive to receiving the information request; and transmitting, 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. ### Claim 18 (depends on 17) The method of claim 17, wherein the information request is received via a physical uplink control channel (PUCCH) or one or more media 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. ### Claim 19 (depends on 17) The method of claim 17, wherein determining the one or more neighbor UEs is based on communication beams corresponding to the one or more serving UEs and the first UE, trajectories of the one or more serving UEs and the first UE, or a combination thereof. ### Claim 20 (depends on 17) The method of claim 17, wherein determining the one or more neighbor UEs comprises: requesting, at the base station, geographic information corresponding to the first UE and the one or more serving UEs from a core network component; and determining the one or more neighbor UEs based on the geographic information. ### Claim 21 (depends on 17) The method of claim 17, wherein determining the one or more neighbor UEs comprises: requesting geographic information from the one or more serving UEs; and determining the one or more neighbor UEs based on the geographic information. ### Claim 22 (depends on 17) The method of claim 17, further comprising: receiving, at the base station from the first UE, a negative-acknowledgement (NACK); and rescheduling, at the base station, transmission of the list to the first UE. ### Claim 23 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 neighbor UEs of the first UE; receive, at the first UE from the base station, a list of one or more neighbor UEs to the first UE; and establish, at the first UE, one or more sidelink connections with the one or more neighbor UEs. ### Claim 24 (depends on 23) The apparatus of claim 23, wherein the information request is transmitted via a physical uplink control channel (PUCCH), and wherein the list is received via a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), or both. ### Claim 25 (depends on 23) The apparatus of claim 23, 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. ### Claim 26 (depends on 23) The apparatus of claim 23, wherein the information comprises beam selection data, angle of arrival (AoA) data, angle of departure (AoD) data, zenith angle of arrival (ZoA) data, zenith angle of departure (ZoD) data, position data, velocity data, channel information, quasi co-location (QCL) data, Doppler spread data, Doppler shift data, delay profile data, delay spread data, or a combination thereof. ### Claim 27 (depends on 23) The apparatus of claim 23, 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. ### Claim 28 (depends on 23) The apparatus of claim 23, 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. ### Claim 29 (depends on 23) The apparatus of claim 23, 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 received from the one or more neighbor UEs. ### Claim 30 (depends on 23) The apparatus of claim 23, 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.