# US 12,120,675 B2 · Variable uplink response and/or scheduling delays for non-terrestrial networks > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,120,675 B2 - Document ID: US12120675B2 - Status: Granted - Kind: B2 - Application number: 18/297,151 - Filed: 2023-04-07 - Published: 2023-08-03 - Granted: 2024-10-15 - Earliest claimed: 2019-05-03 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Xiao Feng Wang; Iyab Issam Sakhnini; Peter Gaal; Jun Ma; Huilin Xu - Web page: https://patentgrep.com/patent/US12120675B2 ## CPC - H04W 72/1268: of uplink data flows - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - 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 74/006: {in the downlink, i.e. towards the terminal} - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station (BS) may determine at least one of a variable random access response (RAR) window start time, a variable maximum quantity of slots for an index of a first slot of a physical random access channel occasion, or scheduling information related to one or more variable delays for an uplink transmission. The BS may transmit, to a user equipment, at least one of information that identifies the RAR window start time, information that identifies the variable maximum quantity of slots, or the scheduling information. Numerous other aspects are provided. ## Claims ### Claim 1 A method of wireless communication performed by a user equipment (UE), comprising: receiving information that identifies a variable random access response (RAR) window start time; and searching for an RAR from the variable RAR window start time until an RAR window size elapses, wherein the variable RAR window start time is greater than or equal to a value determined based at least in part on a feeder link delay and a service link delay. ### Claim 2 (depends on 1) The method of claim 1, wherein the variable RAR window start time is associated with at least one of: a particular beam, or a particular satellite. ### Claim 3 (depends on 1) The method of claim 1, further comprising: receiving information that identifies a variable maximum quantity of slots for an index of a first slot of a physical random access channel (PRACH) occasion, wherein a random access procedure associated with the RAR is performed in accordance with the variable maximum quantity of slots for the index of the first slot of the PRACH occasion. ### Claim 4 (depends on 3) The method of claim 3, wherein the index of the first slot of the PRACH occasion is between zero and another variable maximum quantity of slots. ### Claim 5 (depends on 3) The method of claim 3, wherein the index is located within a variable duration of time that is signaled from a base station or is preconfigured for the UE. ### Claim 6 (depends on 1) The method of claim 1, further comprising: receiving an indication of the RAR window size. ### Claim 7 (depends on 1) The method of claim 1, wherein the RAR includes a cyclic redundancy check (CRC) scrambled by a random access radio network temporary identifier (RA-RNTI). ### Claim 8 (depends on 1) The method of claim 1, wherein the value is determined further based at least in part on a base station processing time. ### Claim 9 (depends on 8) The method of claim 8, wherein the value is determined further based at least in part on a beam-dependent delay. ### Claim 10 A user equipment (UE) for wireless communication, comprising: a memory; and one or more processors, coupled to the memory, configured to: receive information that identifies a variable random access response (RAR) window start time; and search for an RAR from the variable RAR window start time until an RAR window size elapses, wherein the variable RAR window start time is greater than or equal to a value determined based at least in part on a feeder link delay and a service link delay. ### Claim 11 (depends on 10) The UE of claim 10, wherein the variable RAR window start time is associated with at least one of: a particular beam, or a particular satellite. ### Claim 12 (depends on 10) The UE of claim 10, wherein the one or more processors are further configured to: receive information that identifies a variable maximum quantity of slots for an index of a first slot of a physical random access channel (PRACH) occasion, wherein a random access procedure associated with the RAR is performed in accordance with the variable maximum quantity of slots for the index of the first slot of the PRACH occasion. ### Claim 13 (depends on 12) The UE of claim 12, wherein the index of the first slot of the PRACH occasion is between zero and another variable maximum quantity of slots. ### Claim 14 (depends on 12) The UE of claim 12, wherein the index is located within a variable duration of time that is signaled from a base station or is preconfigured for the UE. ### Claim 15 (depends on 10) The UE of claim 10, wherein the one or more processors are further configured to: receive an indication of the RAR window size. ### Claim 16 (depends on 10) The UE of claim 10, wherein the RAR includes a cyclic redundancy check (CRC) scrambled by a random access radio network temporary identifier (RA-RNTI). ### Claim 17 (depends on 10) The UE of claim 10, wherein the value is determined further based at least in part on a base station processing time. ### Claim 18 (depends on 17) The UE of claim 17, wherein the value is determined further based at least in part on a beam-dependent delay. ### Claim 19 An apparatus for wireless communication, comprising: means for receiving information that identifies a variable random access response (RAR) window start time; and means for searching for an RAR from the variable RAR window start time until an RAR window size elapses, wherein the variable RAR window start time is greater than or equal to a value determined based at least in part on a feeder link delay and a service link delay. ### Claim 20 (depends on 19) The apparatus of claim 19, wherein the variable RAR window start time is associated with at least one of: a particular beam, or a particular satellite.