# US 12,015,998 B2 · Device cooperation for mitigation of deafness in sidelink communications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,015,998 B2 - Document ID: US12015998B2 - Status: Granted - Kind: B2 - Application number: 17/453,693 - Filed: 2021-11-05 - Published: 2023-05-11 - Granted: 2024-06-18 - Earliest claimed: 2021-11-05 - Assignees: QUALCOMM Incorporated - Applicants: Qualcomm Incorporated - Inventors: Yisheng Xue; Xiaoxia Zhang; Jing Sun; Chih-Hao Liu; Sony Akkarakaran - Web page: https://patentgrep.com/patent/US12015998B2 ## CPC - H04W 72/02: Selection of wireless resources by user or terminal - H04W 76/14: Direct-mode setup - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/046: {the resource being in the space domain, e.g. beams} - H04W 72/56: based on priority criteria - H04W 88/182: {Network node acting on behalf of an other network entity, e.g. proxy} - H04W 88/04: adapted for relaying to or from another terminal or user - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Methods, systems, and devices for wireless communications are described. A first and second user equipment (UE) may perform a handshake procedure to establish a cooperation agreement designating one or more frequency and time resources which the first UE is to act as the proxy device for the second UE. For example, the first UE may receive a sidelink message directed to a second UE from a third UE. The first UE may determine to act as a proxy device for the second UE with respect to the sidelink message based on the sidelink message being received during a time resource designated for the first UE to act as the proxy device for the second UE. The first UE may proceed to transmit to the third UE feedback information associated with the sidelink message, and may transmit the sidelink message to the second UE on behalf of the third UE. ## Claims ### Claim 1 A method for wireless communications at a first user equipment (UE), comprising: receiving, at the first UE and on a sidelink channel, a sidelink message directed to a second UE and transmitted by a third UE; determining that the first UE is to act as a proxy device for the second UE with respect to the sidelink message based at least in part on the sidelink message being received during a time slot designated for the first UE to act as the proxy device for the second UE; and transmitting, to the third UE based at least in part on the determining, feedback information associated with the sidelink message. ### Claim 2 (depends on 1) The method of claim 1, further comprising: receiving, from the second UE, control signaling designating a set of periodic time slots comprising the time slot for the first UE to act as the proxy device for the second UE, wherein determining that the first UE is to act as the proxy device for the second UE with respect to the sidelink message is based at least in part on receiving the control signaling. ### Claim 3 (depends on 2) The method of claim 2, wherein receiving the control signaling designating the set of periodic time slots for the first UE to act as the proxy device for the second UE comprises: receiving radio resource control signaling via the sidelink channel comprising a set of parameters, the set of parameters comprising a periodicity of the set of periodic time slots, an offset value for the set of periodic time slots, or any combination thereof. ### Claim 4 (depends on 2) The method of claim 2, wherein receiving the control signaling designating the set of periodic time slots for the first UE to act as the proxy device for the second UE comprises: receiving the control signaling designating of the set of periodic time slots during a cooperation establishment procedure for establishing a cooperation agreement. ### Claim 5 (depends on 1) The method of claim 1, wherein determining that the first UE is to act as the proxy device for the second UE with respect to the sidelink message further comprises: receiving, the sidelink message on a first beam of a set of beams, wherein the set of beams is associated with the first UE acting as the proxy device for the second UE. ### Claim 6 (depends on 5) The method of claim 5, further comprising: receiving, from the first UE an indication of the set of beams during a cooperation establishment procedure for establishing a cooperation agreement. ### Claim 7 (depends on 5) The method of claim 5, further comprising: determining that the second UE is located in a geographic coverage area associated with the first beam, wherein determining that the first UE is to act as the proxy device for the second UE with respect to the sidelink message is based at least in part on determining that the second UE is located in the geographic coverage area associated with the first beam. ### Claim 8 (depends on 1) The method of claim 1, wherein determining that the first UE is to act as the proxy device for the second UE with respect to the sidelink message further comprises: determining that the sidelink message transmitted by the third UE satisfies one or more conditions. ### Claim 9 (depends on 8) The method of claim 8, wherein determining that the sidelink message satisfies the one or more conditions comprises: determining that a device identifier for the sidelink message is one of a set of device identifiers identified in a coordination agreement, determining that the sidelink message is a cast type identified in the coordination agreement, determining that the sidelink message is associated with a sidelink priority level identified in the coordination agreement, determining that the sidelink message is associated with a number of retransmissions identified in the coordination agreement, determining that the sidelink message includes a flag indicating a packet delay budget threshold, determining that the UE is located in a geographic coverage area associated with the time slot, or any combination thereof. ### Claim 10 (depends on 1) The method of claim 1, wherein determining that the first UE is to act as the proxy device for the second UE with respect to the sidelink message further comprises: receiving the sidelink message as a unicast sidelink message addressed to the second UE during the time slot. ### Claim 11 (depends on 1) The method of claim 1, further comprising: receiving, from the second UE, a sidelink control information message designating the time slot for the first UE to act as the proxy device for the second UE, wherein determining that the first UE is to act as the proxy device for the second UE with respect to the sidelink message is based at least in part on receiving the sidelink control information message. ### Claim 12 (depends on 1) The method of claim 1, further comprising: transmitting, to the second UE, an indication that the first UE received the sidelink message transmitted by the third UE during the time slot. ### Claim 13 (depends on 1) The method of claim 1, wherein transmitting the feedback information comprises: transmitting a negative acknowledgement feedback message triggering a retransmission of the sidelink message. ### Claim 14 (depends on 13) The method of claim 13, further comprising: refraining from decoding a data message associated with the sidelink message, wherein the sidelink message comprises a sidelink control information message. ### Claim 15 (depends on 13) The method of claim 13, further comprising: decoding the sidelink message; and transmitting, to the first UE on sidelink resources associated with the triggered retransmission, the sidelink message. ### Claim 16 (depends on 1) The method of claim 1, wherein transmitting the feedback information comprises: transmitting an acknowledgement feedback message to the third UE indicating that the second UE successfully received the sidelink message. ### Claim 17 (depends on 16) The method of claim 16, further comprising: decoding the sidelink message; transmitting, to the first UE, an activation of a set of sidelink resources allocated for forwarding signaling received during the time slot; and transmitting, to the first UE on the set of sidelink resources, the sidelink message. ### Claim 18 (depends on 1) The method of claim 1, further comprising: performing a handshake procedure with the first UE to establish a cooperation agreement designating one or more time slots comprising the time slot, one or more conditions, one or more beams, or any combination thereof, for which the UE is to act as the proxy device for the second UE. ### Claim 19 A method for wireless communications at a second user equipment (UE), comprising: determining that a first UE is to act as a proxy device for the second UE with respect to a sidelink message transmitted by a third UE to the second UE based at least in part on the sidelink message being transmitted by the third UE during a time slot Yes-au-Pee designated for the first UE to act as the proxy device for the second UE; performing sidelink communications with the first UE or a fourth UE on a sidelink channel during the time slot; and receiving, after the time slot and based at least in part on the determining, a retransmission of the sidelink message from the third UE, or the sidelink message forwarded by the second UE. ### Claim 20 (depends on 19) The method of claim 19, wherein determining that the first UE is to act as the proxy device for the second UE comprises: performing a handshake procedure with the first UE to establish a cooperation agreement designating one or more time slots comprising the time slot, one or more conditions, one or more beams, or any combination thereof, for which the first UE is to act as the proxy device for the second UE. ### Claim 21 (depends on 19) The method of claim 19, wherein receiving the retransmission of the sidelink message comprises: receiving the retransmission of the sidelink message from the third UE. ### Claim 22 (depends on 19) The method of claim 19, wherein receiving the retransmission of the sidelink message comprises: receiving the retransmission of the sidelink message from the second UE via a set of sidelink resources allocated for the retransmission of the sidelink message by the third UE. ### Claim 23 An apparatus for wireless communications at a first user equipment (UE), comprising: a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: receive, at the first UE and on a sidelink channel, a sidelink message directed to a second UE and transmitted by a third UE; determine that the first UE is to act as a proxy device for the second UE with respect to the sidelink message based at least in part on the sidelink message being received during a time slot designated for the first UE to act as the proxy device for the second UE; and transmit, to the third UE based at least in part on the determining, feedback information associated with the sidelink message. ### Claim 24 (depends on 23) The apparatus of claim 23, wherein the instructions are further executable by the processor to cause the apparatus to: receive, from the second UE, control signaling designating a set of periodic time slots comprising the time slot for the first UE to act as the proxy device for the second UE, wherein determining that the first UE is to act as the proxy device for the second UE with respect to the sidelink message is based at least in part on receiving the control signaling. ### Claim 25 (depends on 24) The apparatus of claim 24, wherein the instructions to receive the control signaling designating the set of periodic time slots for the first UE to act as the proxy device for the second UE are executable by the processor to cause the apparatus to: receive radio resource control signaling via the sidelink channel comprising a set of parameters, the set of parameters comprising a periodicity of the set of periodic time slots, an offset value for the set of periodic time slots, or any combination thereof. ### Claim 26 (depends on 24) The apparatus of claim 24, wherein the instructions to receive the control signaling designating the set of periodic time slots for the first UE to act as the proxy device for the second UE are executable by the processor to cause the apparatus to: receive the control signaling designating of the set of periodic time slots during a cooperation establishment procedure for establishing a cooperation agreement. ### Claim 27 (depends on 23) The apparatus of claim 23, wherein the instructions to determine that the first UE is to act as the proxy device for the second UE with respect to the sidelink message are further executable by the processor to cause the apparatus to: receive, the sidelink message on a first beam of a set of beams, wherein the set of beams is associated with the first UE acting as the proxy device for the second UE. ### Claim 28 (depends on 27) The apparatus of claim 27, wherein the instructions are further executable by the processor to cause the apparatus to: receive, from the first UE an indication of the set of beams during a cooperation establishment procedure for establishing a cooperation agreement. ### Claim 29 An apparatus for wireless communications at a second user equipment (UE), comprising: a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: determine that a first UE is to act as a proxy device for the second UE with respect to a sidelink message transmitted by a third UE to the second UE based at least in part on the sidelink message being transmitted by the third UE during a time slot designated for the first UE to act as the proxy device for the second UE; perform sidelink communications with the first UE or a fourth UE on a sidelink channel during the time slot; and receive, after the time slot and based at least in part on the determining, a retransmission of the sidelink message from the third UE, or the sidelink message forwarded by the second UE. ### Claim 30 (depends on 29) The apparatus of claim 29, wherein the instructions to determine that the first UE is to act as the proxy device for the second UE are executable by the processor to cause the apparatus to: perform a handshake procedure with the first UE to establish a cooperation agreement designating one or more time slots comprising the time slot, one or more conditions, one or more beams, or any combination thereof, for which the first UE is to act as the proxy device for the second UE.