# US 11,452,017 B2 · Transmission configuration indication (TCI) state/beam determination for NR dual active protocol stack (DAPS) handover > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,452,017 B2 - Document ID: US11452017B2 - Status: Granted - Kind: B2 - Application number: 17/004,600 - Filed: 2020-08-27 - Published: 2021-03-04 - Granted: 2022-09-20 - Earliest claimed: 2019-08-30 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Olufunmilola Omolade Awoniyi-Oteri; Tao Luo; Hung Dinh Ly; Yan Zhou - Web page: https://patentgrep.com/patent/US11452017B2 ## CPC - H04B 7/086: {using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming} - H04W 72/566: of the information or information source or recipient - 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} - H04W 16/28: using beam steering - H04W 36/185: {using make before break} - H04W 36/00838: {Resource reservation for handover} - H04W 36/06: Reselecting a communication resource in the serving access point - 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 In an aspect, the present disclosure includes a method, apparatus, and computer readable medium for wireless communications for connecting, by a user equipment (UE), to a source cell via a first transmission configuration indication (TCI) state; connecting, by the UE, to a target cell via a second TCI state during a handover from the source cell to the target cell; determining, by the UE, whether a first transmission using the first TCI state overlaps in time with a second transmission using the second TCI state; and performing, by the UE, TCI selection between the first beam and the second TCI state based at least in part on the determination of whether the first transmission using the first TCI state overlaps or does not overlap with the second transmission using the second TCI state. ## Claims ### Claim 1 An apparatus for wireless communication at a user equipment (UE), comprising: a transceiver; a memory configured to store instructions; and one or more processors communicatively coupled with the transceiver and the memory, wherein the one or more processors are configured to: connect to a source cell via a first beam; connect to a target cell via a second beam during a handover from the source cell to the target cell; determine whether a first transmission using the first beam overlaps in time with a second transmission using the second beam; and in response to determining that the first transmission overlaps in time with the second transmission; establish a time period for prioritizing the target cell over the source cell; select the target cell over the source cell for the time period; and switch from the target cell to the source cell at an end of the time period. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein selection is further performed based on at least one of a type of cell, a type of channel, or a quality of service (QoS). ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the one or more processors are configured to maintain the selection with the target cell over the source cell based on the determination that the time period has not expired. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the one or more processors are further configured to forgo performing the selection based at least in part on the determination that the first transmission using the first beam does not overlap with the second transmission using the second beam. ### Claim 5 (depends on 4) The apparatus of claim 4, wherein the one or more processors are further configured to determine that a distance in time between physical channels of the source cell and the target cell fails to satisfy a beam switching threshold. ### Claim 6 (depends on 5) The apparatus of claim 5, wherein the one or more processors are configured to: identify an earliest received physical channel from either the source cell or the target cell; and perform the selection with either the source cell or the target cell associated with the earliest received physical channel. ### Claim 7 (depends on 5) The apparatus of claim 5, wherein the one or more processors are configured to: determine that a first Physical Downlink Control Channel (PDCCH), associated with the target cell having priority over the source cell, is received before a second PDCCH associated with the source cell; and select for a Physical Downlink Shared Channel (PDSCH) associated with the target cell. ### Claim 8 (depends on 4) The apparatus of claim 4, wherein the one or more processors configured to forgo selection are further configured to: determine that a distance in time between reception of a Physical Downlink Control Channel (PDCCH) associated with the source cell and a Physical Downlink Shared Channel (PDSCH) associated with the target fails to satisfy a beam switching threshold, wherein the target cell has priority over the source cell; and utilize a beam for a PDCCH associated with the target cell and a determined beam for the PDSCH associated with the target cell. ### Claim 9 A method of wireless communication at a user equipment (UE), comprising: connecting to a source cell via a first beam; connecting to a target cell via a second beam during a handover from the source cell to the target cell; determining whether a first transmission using the first beam overlaps in time with a second transmission using the second beam; and in response to determining that the first transmission overlaps in time with the second transmission; establishing a time period for prioritizing the target cell over the source cell; selecting the target cell over the source cell for the time period; and switching from the target cell to the source cell at an end of the time period. ### Claim 10 (depends on 9) The method of claim 9, wherein selection is further performed based on at least one of a type of cell, a type of channel, or a quality of service (QoS). ### Claim 11 (depends on 9) The method of claim 9, further comprising maintaining the selection with the target cell over the source cell based on the determination that the time period has not expired. ### Claim 12 (depends on 9) The method of claim 9, wherein the selection further comprises selecting based at least in part on the determination that the first transmission using the first beam does not overlap with the second transmission using the second beam. ### Claim 13 (depends on 12) The method of claim 12, further comprising: determining that a distance in time between reception of a Physical Downlink Control Channel (PDCCH) associated with the source cell and a Physical Downlink Shared Channel (PDSCH) associated with the target fails to satisfy a beam switching threshold, wherein the target cell has priority over the source cell; and utilizing a beam for a PDCCH associated with the target cell and a determined beam for the PDSCH associated with the target cell. ### Claim 14 (depends on 12) The method of claim 12, wherein the selecting further comprises determining, by the UE, that a distance in time between physical channels of the source cell and the target cell fails to satisfy a beam switching threshold. ### Claim 15 (depends on 14) The method of claim 14, further comprising: identifying an earliest received physical channel from either the source cell or the target cell; and performing the selection with either the source cell or the target cell associated with the earliest received physical channel. ### Claim 16 (depends on 14) The method of claim 14, further comprising: determining that a first Physical Downlink Control Channel (PDCCH), associated with the target cell having priority over the source cell, is received before a second PDCCH associated with the source cell; and select for a Physical Downlink Shared Channel (PDSCH) associated with the target cell. ### Claim 17 An apparatus for wireless communication at a user equipment (UE), comprising: means for connecting to a source cell via a first beam; means for connecting to a target cell via a second beam during a handover from the source cell to the target cell; means for determining whether a first transmission using the first beam overlaps in time with a second transmission using the second beam; means for establishing, in response to determining that the first transmission overlaps in time with the second transmission, a time period for prioritizing the target cell over the source cell; means for selecting the target cell over the source cell for the time period; and means for switching from the target cell to the source cell at an end of the time period. ### Claim 18 (depends on 17) The apparatus of claim 17, wherein selection is further performed based on at least one of a type of cell, a type of channel, or a quality of service (QoS). ### Claim 19 (depends on 17) The apparatus of claim 17, further comprising means for maintaining the selection with the target cell over the source cell based on the determination that the time period has not expired. ### Claim 20 (depends on 17) The apparatus of claim 17, wherein means for selecting further comprises means for selecting based at least in part on the determination that the first transmission using the first beam does not overlap with the second transmission using the second beam. ### Claim 21 (depends on 20) The apparatus of claim 20, wherein means for selecting further comprises means for determining, by the UE, that a distance in time between physical channels of the source cell and the target cell fails to satisfy a beam switching threshold. ### Claim 22 (depends on 20) The apparatus of claim 20, further comprising: means for determining that a distance in time between reception of a Physical Downlink Control Channel (PDCCH) associated with the source cell and a Physical Downlink Shared Channel (PDSCH) associated with the target fails to satisfy a beam switching threshold, wherein the target cell has priority over the source cell; and means for utilizing a beam for a PDCCH associated with the target cell and a determined beam for the PDSCH associated with the target cell. ### Claim 23 (depends on 21) The apparatus of claim 21, further comprising: means for identifying an earliest received physical channel from either the source cell or the target cell; and means for selecting with either the source cell or the target cell associated with the earliest received physical channel. ### Claim 24 (depends on 21) The apparatus of claim 21, further comprising: means for determining that a first Physical Downlink Control Channel (PDCCH), associated with the target cell having priority over the source cell, is received before a second PDCCH associated with the source cell; and means for selecting for a Physical Downlink Shared Channel (PDSCH) associated with the target cell. ### Claim 25 A non-transitory computer-readable medium, comprising code executable by one or more processors to: connect to a source cell via a first beam; connect to a target cell via a second beam during a handover from the source cell to the target cell; determine that a first transmission using the first beam overlaps in time with a second transmission using the second beam; establish, in response to determining that the first transmission overlaps in time with the second transmission, a time period for prioritizing the target cell over the source cell; select the target cell over the source cell for the time period; and switch from the target cell to the source cell at an end of the time period. ### Claim 26 (depends on 25) The computer-readable medium of claim 25, wherein selection is further performed based on at least one of a type of cell, a type of channel, or a quality of service (QoS). ### Claim 27 (depends on 25) The computer-readable medium of claim 25, further comprising code executable by one or more processors to maintain the selection with the target cell over the source cell based on the determination that the time period has not expired. ### Claim 28 (depends on 25) The computer-readable medium of claim 25, further comprising code executable by one or more processors to forgo the selection based at least in part on the determination that the first transmission using the first beam does not overlap with the second transmission using the second beam. ### Claim 29 (depends on 28) The computer-readable medium of claim 28, further comprising code executable by one or more processors to determine that a distance in time between physical channels of the source cell and the target cell fails to satisfy a beam switching threshold. ### Claim 30 (depends on 28) The computer-readable medium of claim 28, further comprising code executable by one or more processors to: determine that a distance in time between reception of a Physical Downlink Control Channel (PDCCH) associated with the source cell and a Physical Downlink Shared Channel (PDSCH) associated with the target fails to satisfy a beam switching threshold, wherein the target cell has priority over the source cell; and utilize a beam for a PDCCH associated with the target cell and a determined beam for the PDSCH associated with the target cell. ### Claim 31 (depends on 29) The computer-readable medium of claim 29, further comprising code executable by one or more processors to: identify an earliest received physical channel from either the source cell or the target cell; and select either the source cell or the target cell associated with the earliest received physical channel. ### Claim 32 (depends on 29) The computer-readable medium of claim 29, further comprising code executable by one or more processors to: determine that a first Physical Downlink Control Channel (PDCCH), associated with the target cell having priority over the source cell, is received before a second PDCCH associated with the source cell; and select for a Physical Downlink Shared Channel (PDSCH) associated with the target cell.