# US 12,016,050 B2 · Random access for a non-terrestrial network > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,016,050 B2 - Document ID: US12016050B2 - Status: Granted - Kind: B2 - Application number: 18/056,365 - Filed: 2022-11-17 - Published: 2023-03-16 - Granted: 2024-06-18 - Earliest claimed: 2019-03-29 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Xiao Feng Wang; Iyab Issam Sakhnini; Jun Ma; Huilin Xu; Dan Zhang - Web page: https://patentgrep.com/patent/US12016050B2 ## CPC - H04W 74/006: {in the downlink, i.e. towards the terminal} - H04B 7/1851: {Systems using a satellite or space-based relay (H04B7/18508, H04B7/18521 take precedence; providing specific services H04B7/18523 - H04B7/18576)} - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W 74/0836: with 2-step access - 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 Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive information that indicates whether to perform a first random access channel (RACH) procedure for a non-terrestrial network or a second RACH procedure for a terrestrial network, wherein the first RACH procedure is configured to support a larger number of UEs contemporaneously performing a RACH procedure than the second RACH procedure. Responsive to the information indicating that the UE is to perform the first RACH procedure, the UE may perform the first RACH procedure. Numerous other aspects are provided. ## Claims ### Claim 1 A method of wireless communication performed by a user equipment (UE), comprising: receiving or determining information that indicates whether to perform a first random access channel (RACH) procedure for a first network or a second RACH procedure for a second network, wherein the first RACH procedure is configured to support a larger number of UEs contemporaneously performing a RACH procedure than the second RACH procedure; and responsive to the information indicating that the UE is to perform the first RACH procedure, performing the first RACH procedure. ### Claim 2 (depends on 1) The method of claim 1, wherein the first RACH procedure is performed based at least in part on a Zadoff-Chu signature that is selected from a larger number of permitted Zadoff-Chu signatures than the second RACH procedure. ### Claim 3 (depends on 1) The method of claim 1, wherein the first RACH procedure is performed based at least in part on a Zadoff-Chu signature that is selected from more than 64 permitted Zadoff-Chu signatures. ### Claim 4 (depends on 1) The method of claim 1, wherein the first RACH procedure comprises a Zadoff-Chu coding procedure and a different coding procedure that is based at least in part on one of: a pseudo-noise sequence, a signature that is randomly or pseudo-randomly selected by the UE, or a signature that is signaled to the UE. ### Claim 5 (depends on 1) The method of claim 1, wherein the first RACH procedure comprises a cover coding procedure that is based at least in part on one of: a number of repetitions of the RACH procedure, a cover code that is randomly or pseudo-randomly selected by the UE, ora cover code that is signaled to the UE. ### Claim 6 (depends on 1) The method of claim 1, further comprising: receiving an indication to perform a particular coding procedure of the first RACH procedure, wherein performing the first RACH procedure comprises performing the particular coding procedure based at least in part on the indication to perform the particular coding procedure. ### Claim 7 (depends on 1) The method of claim 1, wherein the first network or the second network is a non-terrestrial network. ### Claim 8 (depends on 7) The method of claim 7, wherein the information is based at least in part on whether the UE is associated with the non-terrestrial network. ### Claim 9 (depends on 1) The method of claim 1, wherein receiving or determining the information that indicates whether to perform the first RACH procedure or the second RACH procedure comprises: receiving, from a network device, the information that indicates whether to perform the first RACH procedure or the second RACH procedure. ### Claim 10 A method of wireless communication performed by a network device, comprising: transmitting information that indicates whether a user equipment (UE) is to perform a first random access channel (RACH) procedure for a first network or a second RACH procedure for a second network, wherein the first RACH procedure is configured to support a larger number of UEs contemporaneously performing a RACH procedure than the second RACH procedure; and when the information indicates to perform the first RACH procedure, performing the first RACH procedure in accordance with the information. ### Claim 11 (depends on 10) The method of claim 10, wherein the first RACH procedure is performed based at least in part on a Zadoff-Chu signature that is selected from a larger number of permitted Zadoff-Chu signatures than the second RACH procedure. ### Claim 12 (depends on 10) The method of claim 10, wherein the first RACH procedure comprises a Zadoff-Chu coding procedure and a different coding procedure that is based at least in part on one of: a pseudo-noise sequence, or a signature that is randomly or pseudo-randomly selected by the UE. ### Claim 13 (depends on 10) The method of claim 10, further comprising: providing an indication that the UE is to perform a particular coding procedure as part of the first RACH procedure. ### Claim 14 (depends on 10) The method of claim 10, wherein the first network or the second network is a non-terrestrial network. ### Claim 15 (depends on 14) The method of claim 14, wherein the information is based at least in part on whether the UE is associated with the non-terrestrial network. ### Claim 16 A user equipment (UE) for wireless communication, comprising: a memory; and one or more processors, coupled to the memory, configured to: receive or determine information that indicates whether to perform a first random access channel (RACH) procedure for a first network or a second RACH procedure for a second network, wherein the first RACH procedure is configured to support a larger number of UEs contemporaneously performing a RACH procedure than the second RACH procedure; and responsive to the information indicating that the UE is to perform the first RACH procedure, perform the first RACH procedure. ### Claim 17 (depends on 16) The UE of claim 16, wherein the first RACH procedure is performed based at least in part on a Zadoff-Chu signature that is selected from a larger number of permitted Zadoff-Chu signatures than the second RACH procedure. ### Claim 18 (depends on 16) The UE of claim 16, wherein the first RACH procedure is performed based at least in part on a Zadoff-Chu signature that is selected from more than 64 permitted Zadoff-Chu signatures. ### Claim 19 (depends on 16) The UE of claim 16, wherein the first RACH procedure comprises a Zadoff-Chu coding procedure and a different coding procedure that is based at least in part on one of: a pseudo-noise sequence, a signature that is randomly or pseudo-randomly selected by the UE, or a signature that is signaled to the UE. ### Claim 20 (depends on 16) The UE of claim 16, wherein the first RACH procedure comprises a cover coding procedure that is based at least in part on one of: a number of repetitions of the RACH procedure, a cover code that is randomly or pseudo-randomly selected by the UE, or a cover code that is signaled to the UE. ### Claim 21 (depends on 16) The UE of claim 16, wherein the one or more processors are further configured to: receive an indication to perform a particular coding procedure of the first RACH procedure, and wherein the one or more processors, to perform the first RACH procedure, are configured to perform the particular coding procedure based at least in part on the indication to perform the particular coding procedure. ### Claim 22 (depends on 16) The UE of claim 16, wherein the first network or the second network is a non-terrestrial network. ### Claim 23 (depends on 16) The UE of claim 16, wherein the information is based at least in part on whether the UE is associated with the non-terrestrial network. ### Claim 24 (depends on 16) The UE of claim 16, wherein the one or more processors, to receive or determine the information that indicates whether to perform the first RACH procedure or the second RACH procedure, are configured to: receive, from a network device, the information that indicates whether to perform the first RACH procedure or the second RACH procedure. ### Claim 25 A network device for wireless communication, comprising: a memory; and one or more processors, coupled to the memory, configured to: transmit information that indicates whether a user equipment (UE) is to perform a first random access channel (RACH) procedure for a first network or a second RACH procedure for a second network, wherein the first RACH procedure is configured to support a larger number of UEs contemporaneously performing a RACH procedure than the second RACH procedure; and when the information indicates to perform the first RACH procedure, perform the first RACH procedure in accordance with the information. ### Claim 26 (depends on 25) The network device of claim 25, wherein the first RACH procedure is performed based at least in part on a Zadoff-Chu signature that is selected from a larger number of permitted Zadoff-Chu signatures than the second RACH procedure. ### Claim 27 (depends on 25) The network device of claim 25, wherein the first RACH procedure comprises a Zadoff-Chu coding procedure and a different coding procedure that is based at least in part on one of: a pseudo-noise sequence, or a signature that is randomly or pseudo-randomly selected by the UE. ### Claim 28 (depends on 25) The network device of claim 25, wherein the one or more processors are further configured to: provide an indication that the UE is to perform a particular coding procedure as part of the first RACH procedure. ### Claim 29 (depends on 25) The network device of claim 25, wherein the first network or the second network is a non-terrestrial network. ### Claim 30 (depends on 29) The network device of claim 29, wherein the information is based at least in part on whether the UE is associated with the non-terrestrial network.