# US 10,772,119 B2 · Scheduling request based beam failure recovery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,772,119 B2 - Document ID: US10772119B2 - Status: Granted - Kind: B2 - Application number: 16/371,643 - Filed: 2019-04-01 - Published: 2019-10-03 - Granted: 2020-09-08 - Earliest claimed: 2018-03-30 - Assignees: Ofinno, LLC - Applicants: Hua Zhou; Esmael Dinan; Ali Cirik; Alireza Babaei; Hyoungsuk Jeon; Kyungmin Park - Inventors: Hua Zhou; Esmael Dinan; Ali Cirik; Alireza Babaei; Hyoungsuk Jeon; Kyungmin Park - Web page: https://patentgrep.com/patent/US10772119B2 ## CPC - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04B 7/0617: {for beam forming} - H04B 7/06964: {Re-selection of one or more beams after beam failure} - H04B 17/327: Received signal code power [RSCP] - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 72/20: Control channels or signalling for resource management - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04W 72/046: {the resource being in the space domain, e.g. beams} - H04W 76/19: Connection re-establishment - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A wireless device transmits a first scheduling request (SR) based on a buffer status reporting procedure. A second SR is triggered in response to initiating a beam failure recovery. The second SR is transmitted via an uplink control channel resource configured for the second SR. A first downlink control information is received via a downlink control channel, as a response to the second SR. Based on receiving the first downlink control information: the first SR is keep pending, and the second SR is cancelled for the beam failure recovery. ## Claims ### Claim 1 A method comprising: transmitting, by a wireless device, a first scheduling request (SR) based on a buffer status reporting procedure; triggering, in response to initiating a beam failure recovery, a second SR; transmitting the second SR via an uplink control channel resource configured for the second SR; receiving, via a downlink control channel, a first downlink control information as a response to the second SR; and based on receiving the first downlink control information: keeping the first SR pending; and cancelling the second SR for the beam failure recovery. ### Claim 2 (depends on 1) The method of claim 1, wherein the uplink control channel resource comprises at least one of: a frequency radio resource; an uplink control channel format; a cyclic shift of a base sequence; and a time radio resource. ### Claim 3 (depends on 1) The method of claim 1, wherein the first downlink control information comprises a downlink assignment. ### Claim 4 (depends on 1) The method of claim 1, wherein the first downlink control information comprises an uplink grant. ### Claim 5 (depends on 1) The method of claim 1, further comprising completing the beam failure recovery in response to cancelling the second SR. ### Claim 6 (depends on 1) The method of claim 1, further comprising receiving one or more messages comprising at least one of: first configuration parameters of a first plurality of SRs comprising the first SR; and second configuration parameters of the second SR. ### Claim 7 (depends on 6) The method of claim 6, wherein the wireless device triggers the second SR based on the second configuration parameters. ### Claim 8 (depends on 6) The method of claim 6, wherein the second configuration parameters indicate the uplink control channel resource for the second SR. ### Claim 9 (depends on 1) The method of claim 1, wherein the wireless device initiates the beam failure recovery in response to detecting a number of beam failure instances. ### Claim 10 (depends on 9) The method of claim 9, wherein the wireless device detects the number of beam failure instances in response to channel quality of one or more reference signal resources being lower than one or more first thresholds. ### Claim 11 (depends on 9) The method of claim 9, further comprising selecting, from a plurality of reference signals, a first reference signal based on one or more second thresholds in response to initiating the beam failure recovery. ### Claim 12 (depends on 11) The method of claim 11, wherein the second SR indicates a reference signal receive power value of the first reference signal. ### Claim 13 (depends on 11) The method of claim 11, wherein the second SR indicates at least one of: the number of beam failure instances being detected; and the first reference signal being selected. ### Claim 14 (depends on 1) The method of claim 1, further comprising monitoring the downlink control channel for the first downlink control information. ### Claim 15 (depends on 14) The method of claim 14, wherein the wireless device monitors the downlink control channel on: at least one control resource set of the downlink control channel; and at least one search space of the downlink control channel. ### Claim 16 (depends on 14) The method of claim 14, wherein the downlink control channel is associated with the second SR. ### Claim 17 (depends on 16) The method of claim 16, wherein the downlink control channel being associated with the second SR comprises at least one of: at least one control resource set of the downlink control channel being determined based on the second SR; and at least one search space of the downlink control channel being determined based on the second SR. ### Claim 18 (depends on 1) The method of claim 1, further comprising transmitting the first SR via a second uplink control channel resource configured for the first SR, in response to keeping the first SR pending. ### Claim 19 (depends on 18) The method of claim 18, further comprising receiving, via a second downlink control channel, one or more second downlink control information comprising one or more uplink grants. ### Claim 20 (depends on 19) The method of claim 19, further comprising cancelling the first SR in response to the one or more uplink grants accommodating data available for uplink transmission.