# US 11,310,799 B2 · Identifying a beam in 5G wireless communication systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,310,799 B2 - Document ID: US11310799B2 - Status: Granted - Kind: B2 - Application number: 16/846,833 - Filed: 2020-04-13 - Published: 2020-07-30 - Granted: 2022-04-19 - Earliest claimed: 2018-03-02 - Assignees: AT&T Intellectual Property I, L.P. - Applicants: At&T Intellectual Property I, L.P. - Inventors: SaiRamesh Nammi; Salam Akoum; Arunabha Ghosh - Web page: https://patentgrep.com/patent/US11310799B2 ## CPC - H04W 72/046: {the resource being in the space domain, e.g. beams} - H04B 7/0617: {for beam forming} - H04B 7/06952: {Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping} - H04B 7/088: {using beam selection} - H04B 17/328: {Reference signal received power [RSRP]; Reference signal received quality [RSRQ]} - H04W 4/02: Services making use of location information - 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 Various embodiments disclosed herein provide for optimizing identification of a beam in a massive multiple-input multiple output (MIMO) system. The receiver device can select a beam to use for a transmission, and generate channel state information based on a selection of either a single stage beam selection process or a two stage beam selection process. According to an embodiment of the disclosure, the receiver can select which beam selection process to use based on the context of the receiver device. The receiver can select which beam selection process to use based on the long term signal to noise ratio, or the correlation metrics associated with the receiver and transmitter, or based on the path loss between the transmitter and receiver, or based on the location of the receiver relative to the transmitter. ## Claims ### Claim 1 A user equipment device, comprising: a processor; and a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising: determining whether to select a beam for a transmission from a base station device to the user equipment device according to a single stage beam selection protocol or a two stage beam selection protocol, wherein the determining comprises: in response to a signal strength of a reference signal received from the base station device being below a defined threshold, and a correlation value associated with the user equipment device and the base station device being below a correlation value threshold, selecting the beam according to the two stage beam selection protocol, and in response to the signal strength being above the defined threshold, and the correlation value being above the correlation value threshold, selecting the beam according to the single stage beam selection protocol; and transmitting channel state information associated with the beam to the base station device via an uplink control channel. ### Claim 2 (depends on 1) The user equipment device of claim 1, wherein the operations further comprise determining the signal strength of the reference signal based on a location of the user equipment device relative to the base station device. ### Claim 3 (depends on 1) The user equipment device of claim 1, wherein the operations further comprise determining the signal strength of the reference signal based on a path loss of the reference signal. ### Claim 4 (depends on 1) The user equipment device of claim 1, wherein the correlation value is based on multiple channels. ### Claim 5 (depends on 1) The user equipment device of claim 1, wherein the selecting of the beam according to the single stage beam selection protocol comprises selecting the beam based on identifying the beam and associated channel state information that corresponds to a highest throughput of a group of beams. ### Claim 6 (depends on 1) The user equipment device of claim 1, wherein the selecting of the beam according to the two stage beam selection protocol comprises selecting the beam of a group of beams that has a highest signal power, and wherein the operations further comprise, after the selecting of the beam, determining the channel state information for the beam. ### Claim 7 (depends on 6) The user equipment device of claim 6, wherein a throughput of the beam with the channel state information has a block error ratio below a block error ratio threshold. ### Claim 8 A method, comprising: determining, by a receiver device comprising a processor, whether to select a beam for a transmission from a base station device to a user equipment device according to a single stage beam selection protocol or a two stage beam selection protocol, wherein the determining comprises: in response to a signal strength of a reference signal received from the base station device being below a defined threshold, and a correlation value associated with the user equipment device and the base station device being below a correlation value threshold, selecting the beam according to the two stage beam selection protocol, and in response to the signal strength not being below the defined threshold, and the correlation value not being below the correlation value threshold, selecting the beam according to the single stage beam selection protocol; and transmitting, by the receiver device, channel state information associated with the beam to the base station device via an uplink control channel. ### Claim 9 (depends on 8) The method of claim 8, further comprising determining, by the receiver device, the signal strength of the reference signal based on a location of the user equipment device. ### Claim 10 (depends on 8) The method of claim 8, further comprising determining, by the receiver device, the signal strength of the reference signal based on a path loss of the reference signal. ### Claim 11 (depends on 8) The method of claim 8, wherein the correlation value is based on multiple channels. ### Claim 12 (depends on 8) The method of claim 8, wherein the selecting of the beam according to the single stage beam selection protocol comprises selecting the beam based on identifying the beam and associated channel state information that corresponds to a throughput of a group of beams that satisfies a throughput function. ### Claim 13 (depends on 8) The method of claim 8, wherein the selecting of the beam according to the two stage beam selection protocol comprises selecting the beam of a group of beams that that satisfies a signal power function, and wherein the method further comprises, after the selecting of the beam, determining, by the receiver device, the channel state information for the beam. ### Claim 14 (depends on 13) The method of claim 13, wherein a throughput of the beam with the channel state information has a block error ratio below a block error ratio threshold. ### Claim 15 A non-transitory machine-readable medium, comprising executable instructions that, when executed by a processor of a network device, facilitate performance of operations, comprising: determining whether to select a beam for a transmission from a base station device to a user equipment device according to a single stage beam selection protocol or a two stage beam selection protocol, wherein the determining comprises: in response to a signal strength of a reference signal received from the base station device not being above a defined threshold, and a correlation value associated with the user equipment device and the base station device not being above a correlation value threshold, selecting the beam according to the two stage beam selection protocol, and in response to the signal strength being above the defined threshold, and the correlation value being above the correlation value threshold, selecting the beam according to the single stage beam selection protocol; and transmitting channel state information associated with the beam to the base station device via an uplink control channel. ### Claim 16 (depends on 15) The non-transitory machine-readable medium of claim 15, wherein the operations further comprise determining the signal strength of the reference signal based on a distance of the user equipment device to the base station device. ### Claim 17 (depends on 15) The non-transitory machine-readable medium of claim 15, wherein the operations further comprise determining the signal strength of the reference signal based on path loss data representative of a path loss of the reference signal. ### Claim 18 (depends on 15) The non-transitory machine-readable medium of claim 15, wherein the correlation value is based on multiple channels. ### Claim 19 (depends on 15) The non-transitory machine-readable medium of claim 15, wherein the selecting of the beam according to the single stage beam selection protocol comprises selecting the beam based on identifying the beam and associated channel state information that corresponds to at least a threshold throughput of a group of beams. ### Claim 20 (depends on 15) The non-transitory machine-readable medium of claim 15, wherein the selecting of the beam according to the two stage beam selection protocol comprises selecting the beam of a group of beams that has at least a threshold signal power, and wherein the operations further comprise, after the selecting of the beam, determining the channel state information for the beam.