# US 12,120,066 B2 · Facilitating full-duplex operation using an advanced searcher > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,120,066 B2 - Document ID: US12120066B2 - Status: Granted - Kind: B2 - Application number: 17/338,511 - Filed: 2021-06-03 - Published: 2021-12-16 - Granted: 2024-10-15 - Earliest claimed: 2020-06-10 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Navid Abedini; Qian Zhang; Yan Zhou; Kapil Gulati; Tao Luo; Junyi Li - Web page: https://patentgrep.com/patent/US12120066B2 ## CPC - H04B 7/0696: {Determining beam pairs} - H04B 7/0802: {using antenna selection (H04B7/0868 takes precedence; antenna beam directivity switching H01Q3/24)} - H04B 7/088: {using beam selection} - H04L 5/0023: {Time-frequency-space} - 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} - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04B 7/063: {Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection} - H04B 7/0874: {using subgroups of receive antennas} - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Apparatus, methods, and computer-readable media for facilitating full-duplex operation are disclosed herein. The disclosed techniques include using an advanced searcher. An example method for wireless communication at a first wireless device includes receiving a set of reference signals from a second wireless device. The example method also includes determining a first set of BPLs based on the set of reference signals. The example method also includes determining a second set of BPLs based on a capability of full-duplex operation with at least one BPL of the first set of BPLs. Additionally, the example method includes performing measurements for the second set of BPLs. The example method also includes communicating using full-duplex operation by transmitting or receiving via a BPL of the first set of BPLs while also performing the other of transmitting or receiving via a BPL of the second set of BPLs. ## Claims ### Claim 1 An apparatus for wireless communication at a first wireless device, comprising: memory; and at least one processor coupled to the memory and configured to: receive a set of reference signals from a second wireless device; determine a first set of beam-pair links (BPLs) based on the set of reference signals, wherein each BPL in the first set of BPLs includes a first transmit beam and a first receive beam; determine to evaluate a second set of BPLs based on a capability of the second set of BPLs for full-duplex operation with at least one BPL of the first set of BPLs, wherein each BPL in the second set of BPLs includes a second transmit beam and a second receive beam, and wherein to determine the second set of BPLs, the at least one processor is configured to: select, from a plurality of receiver-side beams, a first subset of receiver-side beams based on the at least one BPL of the first set of BPLs, wherein the plurality of receiver-side beams excludes a receiver-side beam of the at least one BPL of the first set of BPLs, or select, from a plurality of transmitter-side beams, a first subset of transmitter-side beams based on the at least one BPL of the first set of BPLs, wherein the plurality of transmitter-side beams excludes a transmitter-side beam of the at least one BPL of the first set of BPLs; perform measurements for the second set of BPLs; and communicate using the full-duplex operation by transmitting or receiving via a first BPL of the first set of BPLs while also performing a different one of transmitting or receiving via a second BPL of the second set of BPLs. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein to determine the first set of BPLs, the at least one processor is configured to: evaluate a plurality of beams based on the set of reference signals; and select one or more BPLs based on one or more beams that satisfy a quality threshold based on an evaluation of the plurality of beams. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein to determine the second set of BPLs, the at least one processor is further configured to: evaluate the first subset of receiver-side beams based on the set of reference signals; and select one or more BPLs based on the first subset of receiver-side beams that satisfy a quality threshold based on an evaluation of the first subset of receiver-side beams. ### Claim 4 (depends on 3) The apparatus of claim 3, wherein a second subset of receiver-side beams comprises the receiver-side beam of the at least one BPL of the first set of BPLs. ### Claim 5 (depends on 4) The apparatus of claim 4, wherein the first subset of receiver-side beams is associated with a first antenna array of the first wireless device and the second subset of receiver-side beams is associated with a second antenna array of the first wireless device, wherein the first antenna array is different than the second antenna array. ### Claim 6 (depends on 4) The apparatus of claim 4, wherein the at least one processor is configured to: receive information regarding a relationship between the at least one BPL of the first set of BPLs and beams of the second subset of receiver-side beams, wherein selecting the first subset of receiver-side beams is based on the information. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein to determine the second set of BPLs, the at least one processor is further configured to: evaluate the first subset of transmitter-side beams based on the set of reference signals; and select one or more BPLs based on the first subset of transmitter-side beams that satisfy a quality threshold based on an evaluation of the first subset of transmitter-side beams. ### Claim 8 (depends on 7) The apparatus of claim 7, wherein the set of reference signals are associated with at least two transmitter-side beams. ### Claim 9 (depends on 7) The apparatus of claim 7, wherein a second subset of transmitter-side beams comprises the transmitter-side beam of the at least one BPL of the first set of BPLs. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein the first subset of transmitter-side beams is associated with a first antenna array or a first TRP of the second wireless device and the second subset of transmitter-side beams is associated with a second antenna array or a second TRP of the second wireless device, the first antenna array or the first TRP being different than the second antenna array or the second TRP. ### Claim 11 (depends on 9) The apparatus of claim 9, wherein the at least one processor is configured to: receive information regarding a relationship between first beams of the first subset of transmitter-side beams and second beams of the second subset of transmitter-side beams, wherein selecting the first subset of transmitter-side beams is based on the information. ### Claim 12 (depends on 9) The apparatus of claim 9, wherein the at least one processor is configured to: receive information regarding a relationship between the at least one BPL of the first set of BPLs and beams of the second subset of transmitter-side beams, wherein selecting the first subset of transmitter-side beams is based on the information. ### Claim 13 (depends on 1) The apparatus of claim 1, wherein the at least one processor is configured to: report at least one of the first set of BPLs and the second set of BPLs to the second wireless device or to a control node. ### Claim 14 (depends on 1) The apparatus of claim 1, wherein the first wireless device comprises a user equipment (UE) or a mobile termination node and the second wireless device comprises a first transmission—reception point (TRP) and a second TRP. ### Claim 15 (depends on 1) The apparatus of claim 1, wherein the first wireless device comprises a user equipment (UE) or a mobile termination node and the second wireless device comprises a base station or a distributed unit node. ### Claim 16 (depends on 1) The apparatus of claim 1, wherein the first set of BPLs are associated with the second wireless device and the second set of BPLs are associated with a third wireless device different than the second wireless device. ### Claim 17 (depends on 16) The apparatus of claim 16, wherein the first wireless device comprises a user equipment (UE) or a mobile termination node, the second wireless device comprises a first distributed unit node, and the third wireless device comprises a second distributed unit node. ### Claim 18 (depends on 16) The apparatus of claim 16, wherein the first wireless device comprises a base station or a distributed unit node, the second wireless device comprises a first user equipment (UE) or a first mobile termination node, and the third wireless device comprises a second UE or a second mobile termination node. ### Claim 19 (depends on 16) The apparatus of claim 16, wherein the at least one processor is configured to: receive relationship information between first beams of the first subset of transmitter-side beams of the second wireless device and second beams of a second subset of transmitter-side beams of the third wireless device, wherein the first set of BPLs are associated with a first subset of the first subset of transmitter-side beams and the second set of BPLs are associated with a second subset of the second subset of transmitter-side beams, and wherein determining the second set of BPLs is based on the relationship information. ### Claim 20 (depends on 16) The apparatus of claim 16, wherein the first wireless device reports a third set of BPLs to the third wireless device based on the first set of BPLs. ### Claim 21 (depends on 1) The apparatus of claim 1, wherein the first wireless device comprises an integrated access and backhaul (IAB) device comprising a mobile termination node associated with a first set of receiver-side beams and a distributed unit node associated with a second set of receiver-side beams. ### Claim 22 (depends on 21) The apparatus of claim 21, wherein the mobile termination node is in communication with a parent node and the distributed unit node is in communication with at least one child node, and wherein the IAB device is capable of the full-duplex operation with the parent node and the at least one child node. ### Claim 23 (depends on 22) The apparatus of claim 22, wherein the first wireless device reports a third set of BPLs to the second wireless device or to a control node based on the first set of BPLs. ### Claim 24 (depends on 23) The apparatus of claim 23, wherein the second set of BPLs are selected from a subset of the second set of receiver-side beams, and wherein each receiver-side beam of the subset is capable of the full-duplex operation with receiver-side beams of the first set of BPLs. ### Claim 25 (depends on 23) The apparatus of claim 23, wherein the first set of BPLs are associated with the at least one child node and wherein the second set of BPLs are associated with the parent node. ### Claim 26 (depends on 25) The apparatus of claim 25, wherein the second set of BPLs are associated with a cross-link interference with the first set of BPLs that satisfies an interference threshold. ### Claim 27 (depends on 26) The apparatus of claim 26, wherein the first wireless device reports the third set of BPLs to the second wireless device or to the control node based on the first set of BPLs. ### Claim 28 (depends on 1) The apparatus of claim 1, further comprising a transceiver coupled to the at least one processor, the transceiver being configured to receive the set of reference signals from the second wireless device, and communicate using the full-duplex operation by transmitting or receiving via the first BPL of the first set of BPLs while also performing the different one of transmitting or receiving via the second BPL of the second set of BPLs. ### Claim 29 (depends on 1) The apparatus of claim 1, wherein the at least one processor is further configured to: receive first relationship information regarding a full-duplex capability associated with each reference signal of the set of reference signals, wherein a first selection of the first subset of receiver-side beams is further based on the first relationship information, or a second selection of the first subset of transmitter-side beams is further based on the first relationship information. ### Claim 30 A method of wireless communication at a first wireless device, comprising: receiving a set of reference signals from a second wireless device; determining a first set of beam-pair links (BPLs) based on the set of reference signals, wherein each BPL in the first set of BPLs includes a first transmit beam and a first receive beam; determining to evaluate a second set of BPLs based on a capability of the second set of BPLs for full-duplex operation with at least one BPL of the first set of BPLs, wherein each BPL in the second set of BPLs includes a second transmit beam and a second receive beam, and wherein determining the second set of BPLs comprises: selecting, from a plurality of receiver-side beams, a first subset of receiver-side beams based on the at least one BPL of the first set of BPLs, wherein the plurality of receiver-side beams excludes a receiver-side beam of the at least one BPL of the first set of BPLs, or selecting, from a plurality of transmitter-side beams, a first subset of transmitter-side beams based on the at least one BPL of the first set of BPLs, wherein the plurality of transmitter-side beams excludes a transmitter-side beam of the at least one BPL of the first set of BPLs; performing measurements for the second set of BPLs; and communicating using the full-duplex operation by transmitting or receiving via a first BPL of the first set of BPLs while also performing a different one of transmitting or receiving via a second BPL of the second set of BPLs. ### Claim 31 (depends on 30) The method of claim 30, wherein determining the first set of BPLs comprises: evaluating a plurality of beams based on the set of reference signals; and selecting one or more BPLs based on one or more beams that satisfy a quality threshold based on evaluating the plurality of beams.