# US 12,192,942 B2 · Random access response window configuration > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,192,942 B2 - Document ID: US12192942B2 - Status: Granted - Kind: B2 - Application number: 18/531,810 - Filed: 2023-12-07 - Published: 2024-03-28 - Granted: 2025-01-07 - Earliest claimed: 2017-08-10 - Assignees: Ofinno, LLC - Applicants: Ofinno, LLC - Inventors: Hyoungsuk Jeon; Esmael Hejazi Dinan; Kyungmin Park; Alireza Babaei; Hua Zhou - Web page: https://patentgrep.com/patent/US12192942B2 ## CPC - H04W 56/0045: {compensating for timing error by altering transmission time} - H04B 7/06952: {Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping} - H04W 16/28: using beam steering - H04W 48/20: Selecting an access point - H04W 74/006: {in the downlink, i.e. towards the terminal} - H04W 76/40: for selective distribution or broadcast - 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 A wireless device receives one or more broadcast messages indicating a first time offset for starting a random access response (RAR) window and preamble transmission occasions. Each of the preamble transmission occasions is associated with a respective synchronization signal (SS)-physical broadcast channel (PBCH) block of SS-PBCH blocks. The wireless device determines, for a preamble transmission, a preamble transmission occasion of the preamble transmission occasions. The preamble transmission occasion is associated with an SS-PBCH block selected from the SS-PBCH blocks. The wireless device starts the RAR window from a starting time based on the preamble transmission occasion, the first time offset, and a second time offset. The wireless device receives, during the RAR window, an RAR of the preamble transmission. ## Claims ### Claim 1 A wireless device comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the wireless device to: receive one or more broadcast messages indicating: a first time offset for starting a random access response (RAR) window; and preamble transmission occasions, wherein each of the preamble transmission occasions is associated with a respective synchronization signal (SS)-physical broadcast channel (PBCH) block of SS-PBCH blocks; determine, for a preamble transmission, a preamble transmission occasion of the preamble transmission occasions, wherein the preamble transmission occasion is associated with an SS-PBCH block selected from the SS-PBCH blocks; start the RAR window from a starting time based on: the preamble transmission occasion; the first time offset; and a second time offset; and receive, during the RAR window, an RAR of the preamble transmission. ### Claim 2 (depends on 1) The wireless device of claim 1, wherein the instructions further cause the wireless device to select, based on a received signal strength of the SS-PBCH block, the SS-PBCH block among the SS-PBCH blocks. ### Claim 3 (depends on 1) The wireless device of claim 1, wherein the instructions further cause the wireless device to transmit the preamble transmission via the preamble transmission occasion. ### Claim 4 (depends on 1) The wireless device of claim 1, wherein the starting time occurs after the preamble transmission occasion with the first time offset and the second time offset. ### Claim 5 (depends on 1) The wireless device of claim 1, wherein the instructions further cause the wireless device to receive the RAR based on a radio network temporary identifier of the wireless device. ### Claim 6 (depends on 1) The wireless device of claim 1, wherein the second time offset is predefined. ### Claim 7 (depends on 6) The wireless device of claim 6, wherein the preamble transmission occasion comprises: a subframe; a slot; a mini-slot; or a duration of one or more orthogonal frequency division multiplexing (OFDM) symbols. ### Claim 8 A base station comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the base station to: transmit one or more broadcast messages indicating: a first time offset for starting a random access response (RAR) window; and preamble transmission occasions, wherein each of the preamble transmission occasions is associated with a respective synchronization signal (SS)-physical broadcast channel (PBCH) block of SS-PBCH blocks; receive, from a wireless device, a preamble transmission via a preamble transmission occasion of the preamble transmission occasions; and transmit, to the wireless device, an RAR of the preamble transmission during the RAR window that starts from a starting time based on: the preamble transmission occasion; the first time offset; and a second time offset. ### Claim 9 (depends on 8) The base station of claim 8, wherein the instructions further cause the base station to transmit the RAR with a best uplink beam pair link. ### Claim 10 (depends on 8) The base station of claim 8, wherein the starting time occurs after the preamble transmission occasion with the first time offset and the second time offset. ### Claim 11 (depends on 8) The base station of claim 8, wherein the instructions further cause the base station to receive the preamble transmission via the preamble transmission occasion. ### Claim 12 (depends on 8) The base station of claim 8, wherein the second time offset is predefined. ### Claim 13 (depends on 12) The base station of claim 12, wherein the preamble transmission occasion comprises: a subframe; a slot; a mini-slot; or a duration of one or more orthogonal frequency division multiplexing (OFDM) symbols. ### Claim 14 A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a wireless device, cause the wireless device to: receive one or more broadcast messages indicating: a first time offset for starting a random access response (RAR) window; and preamble transmission occasions, wherein each of the preamble transmission occasions is associated with a respective synchronization signal (SS)-physical broadcast channel (PBCH) block of SS-PBCH blocks; determine, for a preamble transmission, a preamble transmission occasion of the preamble transmission occasions, wherein the preamble transmission occasion is associated with an SS-PBCH block selected from the SS-PBCH blocks; start the RAR window from a starting time based on: the preamble transmission occasion; the first time offset; and a second time offset; and receive, during the RAR window, an RAR of the preamble transmission. ### Claim 15 (depends on 14) The non-transitory computer-readable medium of claim 14, wherein the instructions further cause the wireless device to select, based on a received signal strength of the SS-PBCH block, the SS-PBCH block among the SS-PBCH blocks. ### Claim 16 (depends on 14) The non-transitory computer-readable medium of claim 14, wherein the instructions further cause the wireless device to transmit the preamble transmission via the preamble transmission occasion. ### Claim 17 (depends on 14) The non-transitory computer-readable medium of claim 14, wherein the starting time occurs after the preamble transmission occasion with the first time offset and the second time offset. ### Claim 18 (depends on 14) The non-transitory computer-readable medium of claim 14, wherein the instructions further cause the wireless device to receive the RAR based on a radio network temporary identifier of the wireless device. ### Claim 19 (depends on 14) The non-transitory computer-readable medium of claim 14, wherein the second time offset is predefined. ### Claim 20 (depends on 19) The non-transitory computer-readable medium of claim 19, wherein the preamble transmission occasion comprises: a subframe; a slot; a mini-slot; or a duration of one or more orthogonal frequency division multiplexing (OFDM) symbols.