# US 2025/0096876 A1 · Methods and systems for receive and transmit beam pairing in full duplex systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0096876 A1 - Document ID: US20250096876A1 - Status: Published application - Kind: A1 - Application number: 18/901,393 - Filed: 2024-09-30 - Published: 2025-03-20 - Earliest claimed: 2020-09-03 - Assignees: Huawei Technologies Co., Ltd. - Inventors: XI ZHANG; JIANGLEI MA - Web page: https://patentgrep.com/patent/US20250096876A1 ## CPC - H04B 7/0696: {Determining beam pairs} - H04B 7/0404: the mobile station comprising multiple antennas, e.g. to provide uplink diversity - H04B 7/0408: using two or more beams, i.e. beam diversity - H04B 7/06952: {Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping} - H04B 7/0697: {using spatial multiplexing} - H04B 7/088: {using beam selection} - H04B 17/328: {Reference signal received power [RSRP]; Reference signal received quality [RSRQ]} - H04B 17/336: Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] - H04J 11/0023: {Interference mitigation or co-ordination (direct sequence spread spectrum [DSSS] systems H04B1/7097; frequency hopping H04B1/713; allocation criteria for ingress interference avoidance H04L5/0062; frequency allocation criteria for requirements on out-of-channel emissions H04L5/0066; arrangements for removing intersymbol interference or baseband equalisers H04L25/03006; peak power aspects in multicarrier modulation H04L27/2614; power management H04W52/00; traffic scheduling H04W72/54, H04W72/541)} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H04L 25/0226: {sounding signals per se} - H04W 76/11: Allocation or use of connection identifiers - H04B: TRANSMISSION - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) - 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 Aspects of the present disclosure provide a manner of avoiding excessive latency and resource consumption due to exhaustive beam searching and pairing for finding an appropriate bi-directional beam pair combination with manageable mutual interference to enable point-to-point FD transmission. Aspects of the present disclosure also provide a solution for enabling multi-user transmission where one or all UEs are with FD capability and the cross-UE interference raised from FD transmission are measured and taken into account during multi-user pairing. ## Claims ### Claim 1 A method applied in a first apparatus, comprising: receiving, configuration information comprising a set of candidate beams that the first apparatus beamforms to receive a signal from or transmit a signal towards; receiving configuration information comprising transmit beam information associated with transmission by a second apparatus with a network device; for a UE transmit and UE receive beam pair for use by the first apparatus selected from one or multiple UE transmit and UE receive beam pairs, each UE transmit beam and UE receive beam belonging to the set of candidate beams: receiving a reference signal (RS) from the second apparatus on the UE receive beam, wherein the RS is for cross-apparatus interference measurement; measuring interference signal strength of the RS on the UE receive angle; determining cross-apparatus interference for the UE receive beam based on the RS; selecting a UE transmit and UE receive beam pair based on the determined cross-apparatus interference, wherein the selected UE transmit and UE receive beam pair belongs to the one or multiple UE transmit and UE receive beam pairs. ### Claim 2 (depends on 1) The method of claim 1, further comprising transmitting an identification of a UE transmit beam and an identification of a UE receive beam of the selected UE transmit and UE receive beam pair. ### Claim 3 (depends on 1) The method of claim 1, wherein the selecting the UE transmit and UE receive beam pair based on determined cross-apparatus interference comprises selecting: the UE transmit and UE receive beam pair with a lowest cross-apparatus interference. ### Claim 4 (depends on 1) The method of claim 1 further comprising transmitting, by the UE, an identification of: a cross-apparatus interference for the UE receive beam based on the measured interference signal strength ### Claim 5 (depends on 1) The method of claim 1, wherein the identification of the UE transmit beam and the identification of the UE receive beam comprises a relative index among the candidate beams. ### Claim 6 (depends on 1) The method of claim 1, wherein during selecting a UE transmit and UE receive beam pair based on the determined cross-apparatus interference comprises at least one of: prioritizing selecting a UE receive beam that receives from a network device transmit beam shared by the second apparatus; or avoiding selecting a UE receive beam that receives from a network device transmit beam shared by the second apparatus. ### Claim 7 (depends on 1) The method of claim 1, wherein receiving the configuration information comprising transmit beam information associated with transmission by the second apparatus with the network device comprises: receiving transmit beam information in which a sound reference signal (SRS) used for determining cross apparatus-interference between the first apparatus and the second apparatus is associated with a SRS used for determining self-isolation for a UE transmit and UE receive beam pair; or receiving transmit beam information in which a SRS used for determining cross apparatus-interference between the first apparatus and the second apparatus is not associated with a SRS used for determining self-isolation for a UE transmit and UE receive beam pair. ### Claim 8 An apparatus comprising: at least one processor coupled with a computer-readable medium having stored thereon computer executable instructions, when the instructions executed by the at least one processor, cause the apparatus to: receive configuration information comprising a set of candidate beams that the apparatus beamforms to receive a signal from or transmit a signal towards; receive configuration information comprising transmit beam information associated with transmission by a second apparatus with a network device; for a UE transmit and UE receive beam pair for use by the first apparatus selected from one or multiple UE transmit and UE receive beam pairs, each UE transmit beam and UE receive beam belonging to the set of candidate beams: receive a reference signal (RS) from the second apparatus on the UE receive beam, wherein the RS is for cross-apparatus interference measurement; measure interference signal strength of the RS on the UE receive beam; determine cross-apparatus interference for the UE receive beam based on the RS; select a UE transmit and UE receive beam pair based on the determined cross-apparatus interference, wherein the selected UE transmit and UE receive beam pair belongs to the one or multiple UE transmit and UE receive angle beams. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein the computer executable instructions, that when executed, cause the apparatus to transmit an identification of a UE transmit beam and an identification of a UE receive beam of the selected UE transmit and UE receive beam pair. ### Claim 10 (depends on 8) The apparatus of claim 8, wherein the computer executable instructions, that when executed, cause the apparatus to select the UE transmit and UE receive beam pair based on determined cross-apparatus interference comprise selecting the UE transmit and UE receive beam pair with a lowest cross-apparatus interference. ### Claim 11 (depends on 8) The apparatus of claim 8, wherein the computer executable instructions, that when executed, further cause the apparatus to transmit an identification of an identification of: a cross-apparatus interference for the UE receive beam based on the measured interference signal strength ### Claim 12 (depends on 8) The apparatus of claim 8, wherein the identification of the UE transmit beam and the identification of the UE receive beam comprises a relative index among the candidate beams. ### Claim 13 (depends on 8) The apparatus of claim 8, wherein during selecting the UE transmit and UE receive beam pair based on the determined cross-apparatus interference comprises at least one of: prioritizing selecting a UE receive beam that receives from a network device transmit beam shared by the second apparatus; or avoiding selecting a UE receive beam that receives from a network device transmit beam shared by the second apparatus. ### Claim 14 (depends on 8) The apparatus of claim 8, wherein the instructions executed by the at least one processor cause the apparatus to: receive transmit beam information in which a sound reference signal (SRS) used for determining cross apparatus-interference between the apparatus and the second apparatus is associated with a SRS used for determining self-isolation for a UE transmit and UE receive beam pair; or receive transmit beam information in which a SRS used for determining cross apparatus-interference between the apparatus and second apparatus is not associated with a SRS used for determining self-isolation for a UE transmit and UE receive beam pair. ### Claim 15 A non-transitory computer-readable storage medium having stored thereon computer-executable instructions, that when executed by a processor, cause the processor to: receive configuration information comprising a set of candidate beams that a first apparatus beamforms to receive a signal from or transmit a signal towards; receive configuration information comprising transmit beam information associated with transmission by a second apparatus with a network device; for a UE transmit and UE receive beam pair for use by the first apparatus selected from one or multiple UE transmit and UE receive beam pairs, each UE transmit beam and UE receive beam belonging to the set of candidate beams: receive a reference signal (RS) from the second apparatus on the UE receive beam, wherein the RS is for cross-apparatus interference measurement; measure interference signal strength of the RS on the UE receive beam; determine cross-apparatus interference for the UE receive beam based on the RS; select a UE transmit and UE receive beam pair based on the determined cross-apparatus interference, wherein the selected UE transmit and UE receive beam pair belongs to the one or multiple UE transmit and UE receive beam pairs. ### Claim 16 (depends on 15) The non-transitory computer-readable storage medium of claim 15, wherein the computer executable instructions, that when executed, cause transmit an identification of a UE transmit beam and an identification of a UE receive beam of the selected UE transmit and UE receive beam pair. ### Claim 17 (depends on 15) The non-transitory computer-readable storage medium of claim 15, wherein the computer executable instructions, that when executed, cause the processor to select the UE transmit and UE receive beam pair based on determined cross-apparatus interference comprise selecting the UE transmit and UE receive beam pair with a lowest cross-apparatus interference. ### Claim 18 (depends on 15) The non-transitory computer-readable storage medium of claim 15, wherein the computer executable instructions, that when executed, further cause the processor to transmit an identification of an identification of: a cross-apparatus interference for the UE receive beam based on the measured interference signal strength ### Claim 19 (depends on 15) The non-transitory computer-readable storage medium of claim 15, wherein the identification of the UE transmit beam and the identification of the UE receive beam comprises a relative index among the candidate beams. ### Claim 20 (depends on 15) The non-transitory computer-readable storage medium of claim 15, wherein during selecting the UE transmit and UE receive beam pair based on the determined cross-apparatus interference comprises at least one of: prioritizing selecting a UE receive beam that receives from a network device transmit beam shared by the second apparatus; or avoiding selecting a UE receive beam that receives from a network device transmit beam shared by the second apparatus.