# US 11,115,892 B2 · Beam failure information for radio configuration > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,115,892 B2 - Document ID: US11115892B2 - Status: Granted - Kind: B2 - Application number: 16/277,062 - Filed: 2019-02-15 - Published: 2019-08-15 - Granted: 2021-09-07 - Earliest claimed: 2018-02-15 - Assignees: Ofinno, LLC - Applicants: Kyungmin Park; Esmael Dinan; Hyoungsuk Jeon; Hua Zhou; Alireza Babaei; Ali Cirik - Inventors: Kyungmin Park; Esmael Dinan; Hyoungsuk Jeon; Hua Zhou; Alireza Babaei; Ali Cirik - Web page: https://patentgrep.com/patent/US11115892B2 ## CPC - H04W 36/305: {Handover due to radio link failure (control signalling for hand-off failure H04W36/0079)} - H04B 7/0617: {for beam forming} - H04B 7/06964: {Re-selection of one or more beams after beam failure} - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 36/0077: {of access information of target access point} - H04W 76/19: Connection re-establishment - H04W 24/04: Arrangements for maintaining operational condition - H04W 36/06: Reselecting a communication resource in the serving access point - H04W 76/38: triggered by timers - 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 may detect a beam failure on at least one beam. The at least one beam may be of a first cell. A beam failure recovery procedure may be started in response to the beam failure. The beam failure recovery procedure may comprise transmitting a recovery request for a first beam. A beam failure recovery timer for the beam failure recovery procedure may be started. The wireless device may determine a connection failure based on expiration of the beam failure recovery timer. The wireless device may transmit a radio link failure report to a first base station based on the connection failure. The radio link failure report may comprise an index of the first beam. ## Claims ### Claim 1 A method comprising: receiving, by a wireless device, a radio resource control message comprising one or more beam configuration parameters of at least one beam of a cell; detecting a beam failure of the at least one beam; initiating a beam failure recovery procedure based on detecting the beam failure; determining a radio link failure based on a failure of the beam failure recovery procedure; and transmitting, based on the radio link failure, a radio link failure report comprising: a first field indicating that the failure of the beam failure recovery procedure is a cause of the radio link failure; and a second field indicating a random access resource for the beam failure recovery procedure. ### Claim 2 (depends on 1) The method of claim 1, wherein: the radio resource control message indicates a random access preamble for the beam failure recovery procedure; and the beam failure recovery procedure comprises transmitting the random access preamble for a recovery request. ### Claim 3 (depends on 1) The method of claim 1, wherein the radio link failure report comprises at least one of: control resource set information for the beam failure recovery procedure; or a number of random access preamble transmissions associated with the beam failure recovery procedure. ### Claim 4 (depends on 1) The method of claim 1, wherein the radio link failure report indicates at least one of: a cell identifier of the cell; at least one beam index of the at least one beam of the cell; a beam index of a candidate beam for the beam failure recovery procedure; or a received power for the candidate beam for the beam failure recovery procedure. ### Claim 5 (depends on 1) The method of claim 1, wherein the radio link failure report comprises the one or more beam configuration parameters of the at least one beam of the cell. ### Claim 6 (depends on 1) The method of claim 1, wherein the at least one beam comprises at least one of: a synchronization signal block beam; or a channel state information-reference signal beam. ### Claim 7 (depends on 1) The method of claim 1, further comprising: receiving, by a second base station comprising the cell from a first base station, a part of the radio link failure report; determining, by the second base station and based on the part of the radio link failure report, configuration parameters of the cell; and transmitting, by the second base station to one or more wireless devices, the configuration parameters. ### Claim 8 (depends on 7) The method of claim 7, wherein the configuration parameters comprise beam configuration parameters for the one or more wireless devices. ### Claim 9 (depends on 1) The method of claim 1, further comprising: selecting, by the wireless device and based on the determining the radio link failure, a second cell; transmitting, to a first base station, a preamble for a random access to the second cell of the first base station; and receiving a random access response in response to the preamble for the random access. ### Claim 10 (depends on 9) The method of claim 9, wherein the transmitting the radio link failure report is based on the receiving the random access response. ### Claim 11 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 a radio resource control message comprising one or more beam configuration parameters of at least one beam of a cell; detect a beam failure of the at least one beam; initiate a beam failure recovery procedure based on detecting the beam failure; determine a radio link failure based on a failure of the beam failure recovery procedure; and transmit, based on the radio link failure, a radio link failure report comprising: a field indicating that the failure of the beam failure recovery procedure is a cause of the radio link failure; and a second field indicating a random access resource for the beam failure recovery procedure. ### Claim 12 (depends on 11) The wireless device of claim 11, wherein: the radio resource control message indicates a random access preamble for the beam failure recovery procedure; and the beam failure recovery procedure comprises transmitting the random access preamble for a recovery request. ### Claim 13 (depends on 11) The wireless device of claim 11, wherein the radio link failure report comprises at least one of: control resource set information for the beam failure recovery procedure; or a number of random access preamble transmissions associated with the beam failure recovery procedure. ### Claim 14 (depends on 11) The wireless device of claim 11, wherein the radio link failure report indicates at least one of: a cell identifier of the cell; at least one beam index of the at least one beam of the cell; a beam index of a candidate beam for the beam failure recovery procedure; or a received power for the candidate beam for the beam failure recovery procedure. ### Claim 15 (depends on 11) The wireless device of claim 11, wherein the radio link failure report comprises the one or more beam configuration parameters of the at least one beam of the cell. ### Claim 16 (depends on 11) The wireless device of claim 11, wherein the at least one beam comprises at least one of: a synchronization signal block beam; or a channel state information-reference signal beam. ### Claim 17 (depends on 11) The wireless device of claim 11, wherein: a second base station, comprising the cell from a first base station, receives a part of the radio link failure report; the second base station determines, based on the part of the radio link failure report, configuration parameters of the cell; and the second base station transmits, to one or more wireless devices, the configuration parameters. ### Claim 18 (depends on 17) The wireless device of claim 17, wherein the configuration parameters comprise beam configuration parameters for the one or more wireless devices. ### Claim 19 (depends on 11) The wireless device of claim 11, wherein the instructions, when executed by the one or more processors, further cause the wireless device to: select, based on the wireless device determining the radio link failure, a second cell; transmit, to a first base station, a preamble for a random access to the second cell of the first base station; and receive a random access response in response to the preamble for the random access. ### Claim 20 (depends on 19) The wireless device of claim 19, wherein the instructions that cause the wireless device to transmit the radio link failure report further cause the wireless device to transmit the radio link failure report based on the wireless device receiving the random access response.