# US 2025/0159699 A1 · Methods and systems for inter-ue coordination scheme2 > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0159699 A1 - Document ID: US20250159699A1 - Status: Published application - Kind: A1 - Application number: 18/836,548 - Filed: 2022-02-11 - Published: 2025-05-15 - Earliest claimed: 2022-02-11 - Assignees: Apple Inc. - Applicants: Apple Inc. - Inventors: Chunxuan Ye; Haitong Sun; Dawei Zhang; Wei Zeng; Huaning Niu; Sigen Ye; Seyed Ali Akbar Fakoorian; Yushu Zhang; Hong He; Weidong Yang - Web page: https://patentgrep.com/patent/US20250159699A1 ## CPC - H04W 72/25: between terminals via a wireless link, e.g. sidelink - H04L 1/1854: {Scheduling and prioritising arrangements} - H04W 72/02: Selection of wireless resources by user or terminal - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A user equipment including a transceiver and a processor is disclosed. The processor is configured to receive from another UE a first sidelink control information (SCI) format payload identifying a number of resources reserved for transmission by the other UE. The processor is configured to detect, based on the received first SCI format and one or more resources selected by the UE for transmission, resource collision corresponding to one or more resources of the number of resources reserved for transmission by the other UE. The processor is configured to send, in response to the detected resource collision, a physical sidelink feedback channel (PSFCH) to the other UE for inter-UE coordination (IUC) of the number of resources reserved for transmission by the other UE. ## Claims ### Claim 1 A user equipment (UE), comprising: a transceiver; and a processor configured to: receive from a second UE a first sidelink control information (SCI) format payload identifying a number of resources reserved for transmission by the second UE; based on the received first SCI format payload and one or more resources selected by the UE for transmission, detect resource collision corresponding to the one or more resources of the number of resources reserved for transmission by the second UE; and in response to the detected resource collision, send a physical sidelink feedback channel (PSFCH) to the second UE for inter-UE coordination (IUC) of the number of resources reserved for transmission by the second UE. ### Claim 2 (depends on 1) The UE of claim 1, wherein the number of resources reserved for transmission by the second UE includes a first reserved resource and a second reserved resource, and wherein the detected resource collision for the second reserved resource, and the second reserved resource is used for transmission of a transport block (TB) later in time after the first reserved resource. ### Claim 3 (depends on 2) The UE of claim 2, wherein the processor is further configured to send the PSFCH to the second UE before the first reserved resource in response to the detected resource collision. ### Claim 4 (depends on 2) The UE of claim 2, wherein the processor is further configured to send the PSFCH to the second UE after the first reserved resource and before the second reserved resource. ### Claim 5 (depends on 2) The UE of claim 2, wherein the first reserved resource and the second reserved resource each is used for transmission of a same TB or different TBs. ### Claim 6 (depends on 2) The UE of claim 2, wherein the processor is further configured to send the PSFCH to the second UE for IUC a (pre)configured or predefined number of periods before the second reserved resource for which the resource collision is detected. ### Claim 7 (depends on 6) The UE of claim 6, wherein the (pre)configured or predefined number of periods is one period. ### Claim 8 (depends on 1) The UE of claim 1, wherein the processor is further configured to build and send a physical sidelink feedback channel (PSFCH) sequence according to the detected resource collision and the PSFCH to the second UE for the IUC. ### Claim 9 (depends on 8) The UE of claim 8, wherein the PSFCH sequence identifies at least one resource of the number of resources for which the resource collision is detected in more than one period. ### Claim 10 (depends on 9) The UE of claim 9, wherein the PSFCH sequence identifies a resource of the number of resources in a next transmission period, or a reserved resource of the number of resources by the second UE. ### Claim 11 (depends on 8) The UE of claim 8, wherein the processor is further configured to prioritize the PSFCH sequence for the IUC with the PSFCH sequence for HARQ, an uplink transmission, and a long-term evolution (LTE) sidelink transmission or reception. ### Claim 12 (depends on 11) The UE of claim 11, wherein to prioritize the PSFCH sequence for the IUC, the processor is further configured to: determine a higher priority among the PSFCH sequence for the IUC, the PSFCH sequence for HARQ, the uplink transmission, and the LTE sidelink transmission or reception; and in response to determining that the PSFCH sequence for the IUC has the highest priority, and the PSFCH sequence for IUC overlaps with the PSFCH for HARQ, prioritize the PSFCH for HARQ over the PSFCH for IUC. ### Claim 13 (depends on 1) The UE of claim 1, wherein sending of the PSFCH to the second UE for the IUC is performed based on one or more of: UE capabilities, a higher layer configuration of the UE, a resource pool configuration at the UE, and a specific implementation of the UE. ### Claim 14 A user equipment (UE), comprising: a transceiver; and a processor configured to: transmit to a second UE a first sidelink control information (SCI) format payload identifying a number of resources reserved for transmission; in response to the first SCI format payload, receive a physical sidelink feedback channel (PSFCH) from the second UE for inter-UE coordination (IUC); and in response to the received PSFCH, detect resource collision for one or more resources of the number of resources reserved for transmission by the UE. ### Claim 15 (depends on 14) The UE of claim 14, wherein the number of resources reserved for transmission includes a first reserved resource and a second reserved resource, the second reserved resource is used for transmission of a transport block (TB) later in time after the first reserved resource. ### Claim 16 (depends on 15) The UE of claim 15, wherein the resource collision for the one or more resources of the number of resources reserved for transmission by the UE corresponds to a time slot of a resource for which the resource collision is detected. ### Claim 17 A method, comprising: receiving, at a first user equipment (UE) from a second UE, a first sidelink control information (SCI) format payload identifying a number of resources reserved for transmission by the second UE; based on the received first SCI format payload and one or more resources selected by the first UE for transmission, detecting, by the first UE, resource collision corresponding to the one or more resources of the number of resources reserved for transmission by the second UE; in response to the detected resource collision, transmitting, from the first UE to the second UE, a PSFCH for inter-UE coordination (IUC) notifying the second UE of the detected resource collision; and prioritizing, by the first UE, transmission of the PSFCH for the IUC along transmission of HARQ, an uplink transmission, and a sidelink transmission or reception. ### Claim 18 (depends on 17) The method of claim 17, wherein the number of resources reserved for transmission by the second UE includes a first reserved resource and a second reserved resource, and wherein the resource collision is detected for the second reserved resource, the second reserved resource is used for transmission of a transport block (TB) later in time after the first reserved resource. ### Claim 19 (depends on 18) The method of claim 18, wherein transmitting the PSFCH for the IUC comprises transmitting the PSFCH to the second UE before the first reserved resource in response to detecting the resource collision. ### Claim 20 (depends on 18) The method of claim 18, wherein transmitting the PSFCH for the IUC comprises transmitting the PSFCH to the second UE after the first reserved resource and before the second reserved resource.