# US 11,115,103 B2 · Method and apparatus for beam measurement and management in wireless systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,115,103 B2 - Document ID: US11115103B2 - Status: Granted - Kind: B2 - Application number: 16/575,206 - Filed: 2019-09-18 - Published: 2020-01-09 - Granted: 2021-09-07 - Earliest claimed: 2016-08-10 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Li Guo; Young-Han Nam; Yang Li; Boon Ng - Web page: https://patentgrep.com/patent/US11115103B2 ## CPC - H04B 7/0696: {Determining beam pairs} - H04B 7/024: Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems - H04B 7/0408: using two or more beams, i.e. beam diversity - H04B 7/0456: Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting - H04B 7/0619: {using feedback from receiving side (feedback signaling for adaptive modulation/coding H04L1/0001)} - H04B 7/088: {using beam selection} - H04B 17/309: Measuring or estimating channel quality parameters - H04W 16/28: using beam steering - H04W 72/046: {the resource being in the space domain, e.g. beams} - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method of user equipment (UE) for beam management in a wireless communication system comprises receiving, from a base station (BS), at least two groups of Tx beams comprising transmit (Tx) signals generated from different antenna panels, the at least two groups of Tx beams transmitted through reference signals; receiving, from the BS, configuration information including a selection constraint for the at least two groups of Tx beams; measuring, based on the configuration information, at least one beam from each of the at least two groups of beams; selecting at least one Tx beam from each of the at least two groups and a same Rx beam set as an Rx beam corresponding to respective selected Tx beams; and transmitting, to the BS, a reporting message including information of the selected Tx beams and the selected same Rx beam set corresponding to the Rx beam. ## Claims ### Claim 1 A method for operating a user equipment (UE) in a wireless communication system, the method comprising: receiving, from a base station (BS), configuration information regarding a channel state information (CSI) reporting, the configuration information configuring the UE to transmit report information for at least two transmit beams that are associated with a same receive beam of the UE; and transmitting, to the BS, the report information based on the configuration information, the report information comprising first information for indicating a first of the two transmit beams and second information for indicating a second of the two transmit beams, wherein a receive beam of the UE is usable for receiving a first signal based on the first transmit beam and a second signal based on the second transmit beam. ### Claim 2 (depends on 1) The method of claim 1, wherein the first transmit beam and the second transmit beam are associated with the receive beam of the UE. ### Claim 3 (depends on 1) The method of claim 1, wherein the first transmit beam and the second transmit beam are identified based on the configuration information. ### Claim 4 (depends on 1) The method of claim 1, further comprising: receiving, from the BS, the first signal based on the first transmit beam; and receiving, from the BS, the second signal based on the second transmit beam, wherein a signal based on the first transmit beam and a signal based on the second transmit beam can be received by the UE at a same time unit based on the receive beam of the UE. ### Claim 5 (depends on 1) The method of claim 1, further comprising transmitting, based on the configuration information to the BS, information comprising: a reference signal received power (RSRP) value indicating a reference channel quality measured based on the first transmit beam, and a differential RSRP value indicating a difference between the reference channel quality and a channel quality based on the second transmit beam. ### Claim 6 (depends on 5) The method of claim 5, wherein the first transmit beam is identified among a plurality of transmit beams of the BS, and wherein the RSRP value is a largest value among a plurality of RSRP values for the plurality of transmit beams of the BS. ### Claim 7 (depends on 1) The method of claim 1, wherein a signal based on the first transmit beam and a signal based on the second transmit beam can be received at a same orthogonal frequency division multiplexing (OFDM) symbol based on the receive beam of the UE, wherein the configuration information further comprises information for configuring the UE to transmit channel state information comprising a resource for indicating a transmit beam and a reference signal received power (RSRP), and wherein the configuration information is transmitted via a radio resource control (RRC) signaling. ### Claim 8 (depends on 1) The method of claim 1, further comprising: transmitting, to the BS, capability information for indicating whether the UE supports a reference signal received power (RSRP) reporting for at least two reference signals. ### Claim 9 A method for operating a base station (BS) in a wireless communication system, the method comprising: transmitting, to a user equipment (UE), configuration information regarding a channel state information (CSI) reporting, the configuration information configuring the UE to transmit report information for at least two transmit beams that are associated with a same receive beam of the UE; and receiving, from the UE, the report information based on the configuration information, the report information comprising first information for indicating a first of the two transmit beams and second information for indicating a second of the two transmit beams, wherein a receive beam of the UE is usable for receiving a first signal based on the first transmit beam and a second signal based on the second transmit beam. ### Claim 10 (depends on 9) The method of claim 9, wherein the first transmit beam and the second transmit beam are associated with the receive beam of the UE. ### Claim 11 (depends on 9) The method of claim 9, wherein the first transmit beam and the second transmit beam are identified based on the configuration information. ### Claim 12 (depends on 9) The method of claim 9, further comprising: transmitting, to the UE, the first signal based on the first transmit beam; and transmitting, to the UE, the second signal based on the second transmit beam, wherein a signal based on the first transmit beam and a signal based on the second transmit beam can be received by the UE at a same time unit based on the receive beam of the UE. ### Claim 13 (depends on 9) The method of claim 9, further comprising receiving, from the UE, information based on the configuration information, the information comprising: a reference signal received power (RSRP) value indicating a reference channel quality measured based on the first transmit beam, and a differential RSRP value indicating a difference between the reference channel quality and a channel quality based on the second transmit beam. ### Claim 14 (depends on 13) The method of claim 13, wherein the first transmit beam is identified among a plurality of transmit beams of the BS, and wherein the RSRP value is a largest value among a plurality of RSRP values for the plurality of transmit beams of the BS. ### Claim 15 (depends on 9) The method of claim 9, wherein a signal based on the first transmit beam and a signal based on the second transmit beam can be received at a same orthogonal frequency division multiplexing (OFDM) symbol based on the receive beam of the UE, wherein the configuration information further comprises information for configuring the UE to transmit channel state information comprising a resource for indicating a transmit beam and a reference signal received power (RSRP), and wherein the configuration information is transmitted via a radio resource control (RRC) signaling. ### Claim 16 (depends on 9) The method of claim 9, further comprising: receiving, from the UE, capability information for indicating whether the UE supports a reference signal received power (RSRP) reporting for at least two reference signals. ### Claim 17 A user equipment (UE) in a wireless communication system, the UE comprising: at least one transceiver; and at least one processor operatively coupled to the at least one transceiver, and configured to: receive, from a base station (BS), configuration information regarding a channel state information (CSI) reporting, the configuration information configuring the UE to transmit report information for at least two transmit beams that are associated with a same receive beam of the UE, and transmit, to the BS, the report information based on the configuration information, the report information comprising first information for indicating a first of the two transmit beams and second information for indicating a second of the two transmit beams, wherein a receive beam of the UE is usable for receiving a first signal based on the first transmit beam and a second signal based on the second transmit beam. ### Claim 18 (depends on 17) The UE of claim 17, wherein the first transmit beam and the second transmit beam are associated with the receive beam of the UE. ### Claim 19 (depends on 17) The UE of claim 17, wherein the first transmit beam and the second transmit beam are identified based on the configuration information. ### Claim 20 (depends on 17) The UE of claim 17, wherein the at least one processor is further configured to: receive, from the BS, the first signal based on the first transmit beam; and receive, from the BS, the second signal based on the second transmit beam, wherein a signal based on the first transmit beam and a signal based on the second transmit beam can be received by the UE at a same time unit based on the receive beam of the UE. ### Claim 21 (depends on 17) The UE of claim 17, wherein the at least one processor is further configured to: transmit, based on the configuration information to the BS, information comprising: a reference signal received power (RSRP) value indicating a reference channel quality measured based on the first transmit beam, and a differential RSRP value indicating a difference between the reference channel quality and a channel quality based on the second transmit beam. ### Claim 22 (depends on 21) The UE of claim 21, wherein the first transmit beam is identified among a plurality of transmit beams of the BS, and wherein the RSRP value is a largest value among a plurality of RSRP values for the plurality of transmit beams of the BS. ### Claim 23 (depends on 17) The UE of claim 17, wherein a signal based on the first transmit beam and a signal based on the second transmit beam can be received at a same orthogonal frequency division multiplexing (OFDM) symbol based on the receive beam of the UE, wherein the configuration information further comprises information for configuring the UE to transmit channel state information comprising a resource for indicating a transmit beam and a reference signal received power (RSRP), and wherein the configuration information is transmitted via a radio resource control (RRC) signaling. ### Claim 24 (depends on 17) The UE of claim 17, wherein the at least one processor is further configured to: transmit, to the BS, capability information for indicating whether the UE supports a reference signal received power (RSRP) reporting for at least two reference signals. ### Claim 25 A base station (BS) in a wireless communication system, the BS comprising: at least one transceiver; and at least one processor operatively coupled to the at least one transceiver, and configured to: transmit, to a user equipment (UE), configuration information regarding a channel state information (CSI) reporting, the configuration information configuring the UE to transmit report information for at least two transmit beams that are associated with a same receive beam of the UE, and receive, from the UE, the report information based on the configuration information, the report information comprising first information for indicating a first of the two transmit beams and second information for indicating a second of the two transmit beams, wherein a receive beam of the UE is usable for receiving a first signal based on the first transmit beam and a second signal based on the second transmit beam. ### Claim 26 (depends on 25) The BS of claim 25, wherein both of the first transmit beam and the second transmit beam are associated with the receive beam of the UE. ### Claim 27 (depends on 25) The BS of claim 25, wherein the first transmit beam and the second transmit beam are identified based on the configuration information. ### Claim 28 (depends on 25) The BS of claim 25, wherein the at least one processor is further configured to: transmit, to the UE, the first signal based on the first transmit beam; and transmit, to the UE, the second signal based on the second transmit beam, wherein a signal based on the first transmit beam and a signal based on the second transmit beam can be received by the UE at a same time unit based on the receive beam of the UE. ### Claim 29 (depends on 25) The BS of claim 25, wherein the at least one processor is further configured to: receive, from the UE, information based on the configuration information, the information comprising: a reference signal received power (RSRP) value indicating a reference channel quality measured based on the first transmit beam, and a differential RSRP value indicating a difference between the reference channel quality and a channel quality based on the second transmit beam. ### Claim 30 (depends on 29) The BS of claim 29, wherein the first transmit beam is identified among a plurality of transmit beams of the BS, and wherein the RSRP value is a largest value among a plurality of RSRP values for the plurality of transmit beams of the BS. ### Claim 31 (depends on 25) The BS of claim 25, wherein a signal based on the first transmit beam and a signal based on the second transmit beam can be received at a same orthogonal frequency division multiplexing (OFDM) symbol based on the receive beam of the UE, wherein the configuration information further comprises information for configuring the UE to transmit channel state information comprising a resource for indicating a transmit beam and a reference signal received power (RSRP), and wherein the configuration information is transmitted via a radio resource control (RRC) signaling. ### Claim 32 (depends on 25) The BS of claim 25, wherein the at least one processor is further configured to: receive, from the UE, capability information for indicating whether the UE supports a reference signal received power (RSRP) reporting for at least two reference signals.