# US 11,910,252 B2 · Radio network node, wireless device, and methods performed in a wireless communication network > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,910,252 B2 - Document ID: US11910252B2 - Status: Granted - Kind: B2 - Application number: 18/149,354 - Filed: 2023-01-03 - Published: 2023-07-13 - Granted: 2024-02-20 - Earliest claimed: 2017-05-12 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Icaro L. J. Da Silva; Patrik Rugeland; Johan Rune - Web page: https://patentgrep.com/patent/US11910252B2 ## CPC - H04W 36/0079: {in case of hand-off failure or rejection} - H04W 36/0072: {of resource information of target access point} - H04W 74/004: {in the uplink, i.e. towards network} - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W 74/0838: using contention-free random access [CFRA] - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Embodiments herein relate, e.g., to a method performed by a wireless device for handling communication in a wireless communication network. The wireless device transmits to a radio network node, a first preamble associated with a selected downlink beam. The wireless device further monitors for a random access response, RAR, in a first RAR reception window and when the RAR is not received in the first RAR reception window, monitors for the RAR in a second RAR reception window of a different beam or to transmit, to the radio network node, a second preamble associated with a second beam wherein the first preamble is associated with a channel state information reference signal and the second preamble is associated with a synchronization signal block. ## Claims ### Claim 1 A method of operating a wireless device in a wireless communication network, the method comprising: transmitting to a radio network node in the wireless communication network, a first preamble associated with a selected downlink beam; monitoring the wireless communication network for a random access response, RAR, during a first RAR reception window; responsive to the RAR not being received during the first RAR reception window, transmitting, to the radio network node, a second preamble associated with a second beam; and monitoring the wireless communication network for the RAR during a second RAR reception window of a different beam, wherein the first preamble is associated with a channel state information reference signal and the second preamble is associated with a synchronization signal block. ### Claim 2 (depends on 1) The method of claim 1, wherein the second beam is wider than the selected downlink beam. ### Claim 3 (depends on 2) The method of claim 2, further comprising: acquiring synchronization with a cell of the selected downlink beam; and detecting and selecting the second beam using the acquired synchronization. ### Claim 4 A wireless device operating in a wireless communication network, the wireless device comprising: processing circuitry; and memory coupled to the processing circuitry and having instructions stored therein that are executable by the processing circuitry to cause the wireless device to perform operations, the operations comprising: transmitting, to a radio network node in the wireless communication network, a first preamble associated with a selected downlink beam; monitoring the wireless communication network for a random access response, RAR, during a first RAR reception window; responsive to the RAR not being received during the first RAR reception window, transmitting, to the radio network node, a second preamble associated with a second beam; and monitoring the wireless communication network for the RAR during a second RAR reception window of a different beam wherein the first preamble is associated with a channel state information reference signal and the second preamble is associated with a synchronization signal block. ### Claim 5 (depends on 4) The wireless device of claim 4, wherein the second beam is wider than the selected downlink beam. ### Claim 6 (depends on 5) The wireless device of claim 5, the operations further comprising: acquiring synchronization with a cell of the selected downlink beam; and detecting and selecting the second beam using the acquired synchronization. ### Claim 7 (depends on 6) The wireless device of claim 6, the operations further comprising: receiving a radio resource control, RRC, connection reconfiguration message including random access channel, RACH, mapping configuration; responsive to receiving the RRC connection reconfiguration message, selecting the selected downlink beam based on the RACH mapping configurations; and responsive to the RAR not being received during the first RAR reception window, selecting the second beam based on the RACH mapping configurations. ### Claim 8 A non-transitory computer-readable medium having instructions stored therein that are executable by processing circuitry of a wireless device in a wireless communication network to cause the wireless device to perform operations, the operations comprising: transmitting, to a radio network node in the wireless communication network, a first preamble associated with a selected downlink beam; monitoring the wireless communication network for a random access response, RAR, during a first RAR reception window; responsive to the RAR not being received during the first RAR reception window, transmitting, to the radio network node, a second preamble associated with a second beam; and monitoring the wireless communication network for the RAR during a second RAR reception window of a different beam wherein the first preamble is associated with a channel state information reference signal and the second preamble is associated with a synchronization signal block. ### Claim 9 (depends on 8) The non-transitory computer-readable medium of claim 8, wherein the second beam is wider than the selected downlink beam. ### Claim 10 (depends on 9) The non-transitory computer-readable medium of claim 9, further comprising: acquiring synchronization with a cell of the selected downlink beam; and detecting and selecting the second beam using the acquired synchronization. ### Claim 11 (depends on 8) The non-transitory computer-readable medium of claim 8, the operations further comprising: receiving a radio resource control, RRC, connection reconfiguration message including random access channel, RACH, mapping configuration; responsive to receiving the RRC connection reconfiguration message, selecting the selected downlink beam based on the RACH mapping configurations; and responsive to the RAR not being received during the first RAR reception window, selecting the second beam based on the RACH mapping configurations.