# US 12,114,209 B2 · Techniques for sidelink resource reservations > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,114,209 B2 - Document ID: US12114209B2 - Status: Granted - Kind: B2 - Application number: 17/175,438 - Filed: 2021-02-12 - Published: 2022-08-18 - Granted: 2024-10-08 - Earliest claimed: 2021-02-12 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Seyedkianoush Hosseini; Kapil Gulati; Gabi Sarkis; Hong Cheng; Qing Li; Tien Viet Nguyen - Web page: https://patentgrep.com/patent/US12114209B2 ## CPC - H04W 28/26: Resource reservation - H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame} - H04W 72/02: Selection of wireless resources by user or terminal - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/20: Control channels or signalling for resource management - H04W 72/56: based on priority criteria - H04W 76/14: Direct-mode setup - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - H04W 52/0245: {according to signal strength} - H04W 88/04: adapted for relaying to or from another terminal or user - H04W 92/18: between terminal devices - 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 user equipment (UE) may transmit, within an active duration of a first sidelink discontinuous reception (DRX) pattern of a second UE, sidelink control information (SCI) indicating a resource reservation for a sidelink resource of the sidelink channel within at least a portion of an inactive duration of the first sidelink DRX pattern. The first UE may then communicate, with the second UE via the sidelink channel, a sidelink message within the sidelink resource indicated in the resource reservation. ## Claims ### Claim 1 A method for wireless communication at a first user equipment (UE), comprising: transmitting, to a second UE and within an active duration of a first sidelink discontinuous reception pattern of the second UE, sidelink control information indicating a resource reservation for a sidelink resource of a sidelink channel within at least a portion of an inactive duration of the first sidelink discontinuous reception pattern, wherein transmitting the sidelink control information indicating the resource reservation of the sidelink resource within the inactive duration is based at least in part on a resource availability within the active duration failing to satisfy a threshold resource availability; and communicating, with the second UE via the sidelink channel, a sidelink message within the sidelink resource of the sidelink channel within at least the portion of the inactive duration indicated in the resource reservation. ### Claim 2 (depends on 1) The method of claim 1, further comprising: identifying a second resource reservation indicated by an additional UE for a second sidelink resource within a second portion of the inactive duration, wherein transmitting the sidelink control information indicating the resource reservation for the sidelink resource within the portion of the inactive duration is based at least in part on identifying the second resource reservation for the second sidelink resource within the second portion of the inactive duration. ### Claim 3 (depends on 1) The method of claim 1, further comprising: identifying an absence of additional resource reservations indicated by additional UEs for sidelink resources within the portion of the inactive duration, wherein transmitting the sidelink control information indicating the resource reservation within the portion of the inactive duration is based at least in part on the absence of additional resource reservations for sidelink resources within the portion of the inactive duration. ### Claim 4 (depends on 1) The method of claim 1, wherein transmitting the sidelink control information comprises: transmitting the sidelink control information indicating the resource reservation based at least in part on the resource availability failing to satisfy a second threshold resource availability that is adjusted relative to a first threshold resource availability. ### Claim 5 (depends on 1) The method of claim 1, wherein transmitting the sidelink control information comprises: transmitting the sidelink control information indicating the resource reservation based at least in part on the resource availability corresponding to a first priority associated with the sidelink message. ### Claim 6 (depends on 1) The method of claim 1, further comprising: receiving a feedback message from the second UE in response to the sidelink control information and based at least in part on the sidelink resource being positioned within at least the portion of the inactive duration, wherein communicating the sidelink message within the sidelink resource of the sidelink channel within at least the portion of the inactive duration is based at least in part on receiving the feedback message. ### Claim 7 (depends on 6) The method of claim 6, wherein the feedback message is received via a sidelink feedback channel, and wherein the feedback message comprises an indication that the second UE will adjust the first sidelink discontinuous reception pattern to communicate the sidelink message within the inactive duration, wherein communicating the sidelink message within the inactive duration is based at least in part on the indication. ### Claim 8 (depends on 1) The method of claim 1, wherein the first UE is configured to remain in an active state. ### Claim 9 (depends on 1) The method of claim 1, wherein the resource reservation occurs within an active duration of a second sidelink discontinuous reception pattern of the first UE. ### Claim 10 (depends on 9) The method of claim 9, wherein the active duration of the second sidelink discontinuous reception pattern is longer than the active duration of the first sidelink discontinuous reception pattern. ### Claim 11 (depends on 1) The method of claim 1, further comprising: determining an absence of periodic sidelink transmissions scheduled to be performed within the inactive duration, wherein transmitting the sidelink control information indicating the resource reservation within the inactive duration is based at least in part on the absence of periodic sidelink transmissions scheduled within the inactive duration. ### Claim 12 (depends on 1) The method of claim 1, wherein an active duration of second discontinuous reception pattern of the first UE is aligned in a time domain with the active duration of the first sidelink discontinuous reception pattern. ### Claim 13 (depends on 1) The method of claim 1, wherein the sidelink message comprises a periodic sidelink message, an aperiodic sidelink message, or both. ### Claim 14 (depends on 1) The method of claim 1, further comprising: receiving an indication of the first sidelink discontinuous reception pattern of the second UE from the second UE, a network entity, or both. ### Claim 15 A method for wireless communication at a second user equipment (UE), comprising: receiving, from a first UE and within an active duration of a first sidelink discontinuous reception pattern of the second UE, sidelink control information indicating a resource reservation for a sidelink resource of a sidelink channel within at least a portion of an inactive duration of the first sidelink discontinuous reception pattern, wherein receiving the sidelink control information indicating the resource reservation of the sidelink resource within the inactive duration is based at least in part on a resource availability within the active duration failing to satisfy a threshold resource availability; and communicating, with the first UE via the sidelink channel, a sidelink message within the sidelink resource of the sidelink channel within at least the portion of the inactive duration indicated in the resource reservation. ### Claim 16 (depends on 15) The method of claim 15, wherein sidelink control information indicates the resource reservation for the sidelink resource within the portion of the inactive duration based at least in part on a second resource reservation indicated by an additional UE reserving a second sidelink resource within a second portion of the inactive duration. ### Claim 17 (depends on 15) The method of claim 15, wherein the sidelink control information indicates the resource reservation for the sidelink resource within the portion of the inactive duration based at least in part on an absence of additional resource reservations indicated by additional UEs reserving sidelink resources within the portion of the inactive duration. ### Claim 18 (depends on 15) The method of claim 15, wherein receiving the sidelink control information comprises: receiving the sidelink control information indicating the resource reservation based at least in part on the resource availability failing to satisfy a second threshold resource availability that is adjusted relative to a first threshold resource availability. ### Claim 19 (depends on 15) The method of claim 15, wherein receiving the sidelink control information comprises: receiving the sidelink control information indicating the resource reservation based at least in part on the resource availability corresponding to a first priority associated with the sidelink message. ### Claim 20 (depends on 15) The method of claim 15, further comprising: transmitting a feedback message to the first UE in response to the sidelink control information and based at least in part on the sidelink resource being positioned within at least the portion of the inactive duration, wherein communicating the sidelink message within the sidelink resource of the sidelink channel within at least the portion of the inactive duration is based at least in part on transmitting the feedback message. ### Claim 21 (depends on 20) The method of claim 20, wherein the feedback message is received via a sidelink feedback channel, and wherein the feedback message comprises an indication that the second UE will adjust the first sidelink discontinuous reception pattern to communicate the sidelink message within the inactive duration, wherein communicating the sidelink message within the inactive duration is based at least in part on the indication. ### Claim 22 (depends on 15) The method of claim 15, wherein the first UE is configured to remain in an active state. ### Claim 23 (depends on 15) The method of claim 15, wherein the resource reservation occurs within an active duration of a second sidelink discontinuous reception pattern of the first UE. ### Claim 24 (depends on 23) The method of claim 23, wherein the active duration of the second sidelink discontinuous reception pattern is longer than the active duration of the first sidelink discontinuous reception pattern. ### Claim 25 (depends on 15) The method of claim 15, wherein the sidelink control information indicates the resource reservation for the sidelink resource within the portion of the inactive duration based at least in part on an absence of periodic sidelink transmissions scheduled to be performed within the inactive duration. ### Claim 26 (depends on 15) The method of claim 15, further comprising: initiating an inactivity timer based at least in part on receiving the sidelink control information indicating the resource reservation; and extending the active duration of the first sidelink discontinuous reception pattern based at least in part on the inactivity timer, wherein communicating the sidelink message is based at least in part on extending the active duration of the first sidelink discontinuous reception pattern. ### Claim 27 An apparatus for wireless communication at a first user equipment (UE), comprising: at least one processor; at least one memory coupled with the at least one processor; and instructions stored in the at least one memory and executable by the at least one processor to cause the apparatus to: transmit, to a second UE and within an active duration of a first sidelink discontinuous reception pattern of the second UE, sidelink control information indicating a resource reservation for a sidelink resource of a sidelink channel within at least a portion of an inactive duration of the first sidelink discontinuous reception pattern, wherein transmission of the sidelink control information indicating the resource reservation of the sidelink resource within the inactive duration is based at least in part on a resource availability within the active duration failing to satisfy a threshold resource availability; and communicate, with the second UE via the sidelink channel, a sidelink message within the sidelink resource of the sidelink channel within at least the portion of the inactive duration indicated in the resource reservation. ### Claim 28 (depends on 27) The apparatus of claim 27, wherein the instructions are further executable by the at least one processor to cause the apparatus to: identify a second resource reservation indicated by an additional UE for a second sidelink resource within a second portion of the inactive duration, wherein transmission of the sidelink control information indicating the resource reservation for the sidelink resource within the portion of the inactive duration is based at least in part on identification of the second resource reservation for the second sidelink resource within the second portion of the inactive duration. ### Claim 29 (depends on 28) The apparatus of claim 28, wherein the instructions are further executable by the at least one processor to cause the apparatus to: identify an absence of additional resource reservations indicated by additional UEs for sidelink resources within the portion of the inactive duration, wherein transmission of the sidelink control information indicating the resource reservation within the portion of the inactive duration is based at least in part on the absence of additional resource reservations for sidelink resources within the portion of the inactive duration. ### Claim 30 An apparatus for wireless communication at a second user equipment (UE), comprising: at least one processor; at least one memory coupled with the at least one processor; and instructions stored in the at least one memory and executable by the at least one processor to cause the apparatus to: receive, from a first UE and within an active duration of a first sidelink discontinuous reception pattern of the second UE, sidelink control information indicating a resource reservation for a sidelink resource of a sidelink channel within at least a portion of an inactive duration of the first sidelink discontinuous reception pattern, wherein reception of the sidelink control information indicating the resource reservation of the sidelink resource within the inactive duration is based at least in part on a resource availability within the active duration failing to satisfy a threshold resource availability; and communicate, with the first UE via the sidelink channel, a sidelink message within the sidelink resource of the sidelink channel within at least the portion of the inactive duration indicated in the resource reservation.