# US 10,484,995 B2 · Joint procedure for beam management and partial control 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 10,484,995 B2 - Document ID: US10484995B2 - Status: Granted - Kind: B2 - Application number: 16/285,420 - Filed: 2019-02-26 - Published: 2019-06-20 - Granted: 2019-11-19 - Earliest claimed: 2017-09-15 - Assignees: AT&T Intellectual Property I, L.P. - Applicants: AT&T Intellectual Property I, L.P. - Inventors: Xiaoyi Wang; Salam Akoum; Arunabha Ghosh - Web page: https://patentgrep.com/patent/US10484995B2 ## CPC - H04W 72/046: {the resource being in the space domain, e.g. beams} - H04B 7/0408: using two or more beams, i.e. beam diversity - H04B 7/0617: {for beam forming} - H04B 7/0619: {using feedback from receiving side (feedback signaling for adaptive modulation/coding H04L1/0001)} - H04B 7/063: {Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection} - H04B 7/06964: {Re-selection of one or more beams after beam failure} - H04B 7/088: {using beam selection} - H04B 17/328: {Reference signal received power [RSRP]; Reference signal received quality [RSRQ]} - H04L 5/0025: {Spatial division following the spatial signature of the channel} - 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)} - H04L 5/006: {Quality of the received signal, e.g. BER, SNR, water filling} - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 28/18: Negotiating wireless communication parameters - H04W 72/20: Control channels or signalling for resource management - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 72/54: based on quality criteria - H04W 76/10: Connection setup - H04W 74/0833: Random access procedures, e.g. with 4-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 - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The described technology is generally directed towards a joint procedure in wireless communications for reporting a partial beam failure or performing beam management when no beams have failed. The joint procedure reports the beam management reference signal received power and control beam recovery on a common feedback channel, which avoids the need for a reserved, dedicated feedback channel resource for beam recovery. Also described is configuring a possibly different failure threshold for each selected beam, whereby the network can configure different beams to have different reliability/quality-of-service levels for example. ## Claims ### Claim 1 A method, comprising: obtaining, by a user equipment comprising a processor, threshold values, wherein the threshold values are associated with respective beams of a selected control channel search space; comparing, by the user equipment, respective measured reference signal received power values of the respective beams with the threshold values associated with the respective beams; and in response to determining, based on the comparing, a partial control beam failure wherein fewer than all of the respective beams, with respective threshold values of the threshold values, have measured reference signal received power values that do not satisfy the respective threshold values, transmitting, by the user equipment to a network device, a partial control beam failure report via a physical uplink control channel that is the physical uplink control channel for a beam management procedure. ### Claim 2 (depends on 1) The method of claim 1, wherein the transmitting the partial control beam failure report to the network device comprises reporting an index of a first selected control channel beam in association with a first measured reference signal received power value. ### Claim 3 (depends on 2) The method of claim 2, wherein the transmitting the partial control beam failure report to the network device further comprises transmitting the partial control beam failure report via a second selected control channel beam. ### Claim 4 (depends on 1) The method of claim 1, wherein the obtaining the threshold values comprises receiving the threshold values from the network device, in which at least one threshold value of the threshold values is based on a quality of service characteristic for an associated selected control channel beam. ### Claim 5 (depends on 1) The method of claim 1, wherein the obtaining the threshold values comprises receiving the threshold values from the network device, in which at least one threshold value of the threshold values is based on a reference signal type. ### Claim 6 (depends on 1) The method of claim 1, wherein the respective threshold values of the fewer than all of the respective beams are first respective threshold values, and wherein the partial control beam failure is indicative that other beams of the respective beams, other than the fewer than all of the respective beams, have satisfied second respective threshold values of the threshold values applicable to the other beams. ### Claim 7 (depends on 1) The method of claim 1, wherein the respective beams are arranged in subgroups of a larger group, and further comprising performing, by the user equipment, the beam management procedure comprising reporting a maximum channel state information reference signal for each subgroup of the subgroups. ### Claim 8 A user equipment, comprising: a processor; and a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, the operations comprising: obtaining threshold values, wherein the threshold values are associated with respective beams of a selected control channel search space; comparing respective measured reference signal received power values of the respective beams with the threshold values associated with the respective beams; and in response to determining, based on the comparing, a partial control beam failure where a first group of the respective beams, comprising some and not all of the respective beams, have measured reference signal received power values that do not satisfy first threshold values of the threshold values associated with the first group of respective beams, transmitting, to a network device, a partial control beam failure report via a physical uplink control channel that is the physical uplink control channel for a beam management procedure. ### Claim 9 (depends on 8) The user equipment of claim 8, wherein the transmitting the partial control beam failure report to the network device comprises reporting a first index of a first selected control channel beam in association with a first measured reference signal received power value. ### Claim 10 (depends on 9) The user equipment of claim 9, wherein the transmitting the partial control beam failure report to the network device comprises transmitting the partial control beam failure report via a second selected control channel beam. ### Claim 11 (depends on 8) The user equipment of claim 8, wherein the obtaining the threshold values comprises receiving the threshold values from the network device, in which at least one threshold value of the threshold values is based on a quality of service characteristic for an associated selected control channel beam. ### Claim 12 (depends on 8) The user equipment of claim 8, wherein the obtaining the threshold values comprises receiving the threshold values from the network device, in which at least one threshold value of the threshold values is based on a reference signal type. ### Claim 13 (depends on 8) The user equipment of claim 8, wherein the partial control beam failure is indicative of the first group of the respective beams, and further indicative a second group of the respective beams that have measured reference signal received power values that satisfy second respective threshold values of the threshold values applicable to the second group of the respective beams. ### Claim 14 (depends on 8) The user equipment of claim 8, wherein the respective beams are arranged in subgroups of a larger group, and the operations further comprising performing the beam management procedure comprising reporting a maximum channel state information reference signal for each subgroup of the subgroups. ### Claim 15 A non-transitory machine-readable medium, comprising executable instructions that, when executed by a processor of a user equipment, facilitate performance of operations, the operations comprising: obtaining threshold values, wherein the threshold values are associated with respective beams of a selected control channel search space; comparing respective measured reference signal received power values of the respective beams with the threshold values associated with the respective beams; and in response to determining, based on the comparing, a partial control beam failure where some and not all of the respective beams have measured reference signal received power values that do not satisfy first threshold values associated with the some and not all of the respective beams, transmitting, to a network device, a partial control beam failure report via a physical uplink control channel that is the physical uplink control channel for a beam management procedure. ### Claim 16 (depends on 15) The non-transitory machine-readable medium of claim 15, wherein the partial control beam failure report to the network device comprises reporting a first index of a first selected control channel beam in association with a first measured reference signal received power value. ### Claim 17 (depends on 16) The non-transitory machine-readable medium of claim 16, wherein the partial control beam failure report to the network device comprises transmitting the partial control beam failure report via a second selected control channel beam. ### Claim 18 (depends on 15) The non-transitory machine-readable medium of claim 15, wherein the obtaining the threshold values comprises receiving the threshold values from the network device, in which at least one threshold value of the threshold values is based on a quality of service characteristic for an associated selected control channel beam. ### Claim 19 (depends on 15) The non-transitory machine-readable medium of claim 15, wherein the obtaining the threshold values comprises receiving the threshold values from the network device, in which at least one threshold value of the threshold values is based on a reference signal type. ### Claim 20 (depends on 15) The non-transitory machine-readable medium of claim 15, wherein the partial control beam failure is indicative of the first number of beams comprising the some and not all of the respective beams, and further indicative of a second number of beams of the respective beams that have satisfied second respective threshold values of the threshold values applicable to the second number of beams.