# US 12,015,959 B2 · Mobility enhancements: CHO execution condition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,015,959 B2 - Document ID: US12015959B2 - Status: Granted - Kind: B2 - Application number: 17/643,535 - Filed: 2021-12-09 - Published: 2023-06-15 - Granted: 2024-06-18 - Earliest claimed: 2021-12-09 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Jelena Damnjanovic; Tao Luo; Aleksandar Damnjanovic - Web page: https://patentgrep.com/patent/US12015959B2 ## CPC - H04W 36/00837: {Determination of triggering parameters for hand-off} - H04W 36/362: {Conditional handover} - H04W 36/0058: {Transmission of hand-off measurement information, e.g. measurement reports} - H04W 36/0072: {of resource information of target access point} - H04W 56/001: {Synchronization between nodes} - H04W 16/28: using beam steering - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Methods, apparatuses, and computer-readable storage medium for conditional handover (CHO) are provided. An example method at a UE may include receiving, from a first base station, a CHO configuration comprising one or more CHO candidate cell configurations associated with a second base station and one or more execution conditions associated with the first base station and including one or more CHO measurements, the one or more CHO measurements comprising one or more L1 beam or cell specific measurements or one or more L3 beam specific measurements. The example method may further include detaching from a first cell associated with the first base station and synchronizing with a second cell associated with the second base station based on the one or more CHO measurements satisfying the one or more execution conditions, the second cell being one cell associated with the one or more CHO candidate cell configurations. ## Claims ### Claim 1 An apparatus for wireless communication at a user equipment (UE), comprising: a memory; and at least one processor coupled to the memory and configured to: receive, from a first base station, a conditional handover (CHO) configuration comprising one or more CHO candidate cell configurations associated with a second base station via a handover request acknowledge and one or more execution conditions associated with the first base station and including one or more CHO measurements, the one or more CHO measurements comprising one or more layer 1 (L1) beam or cell specific measurements or one or more layer 3 (L3) beam specific measurements, wherein the one or more execution conditions comprises a slope associated with the one or more L1 beam or cell specific measurements and the one or more L3 beam or cell specific measurements; and detach from a first cell associated with the first base station and synchronize with a second cell associated with the second base station based on the one or more CHO measurements satisfying the one or more execution conditions, the second cell being one cell associated with the one or more CHO candidate cell configurations. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the one or more CHO measurements comprises a combination of the one or more L1 beam or cell specific measurements and the one or more L3 beam specific measurements. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the one or more execution conditions are based on a primary cell. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the one or more execution conditions are based on a primary cell and one or more secondary cells. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the one or more L1 beam or cell specific measurements comprises inter-frequency measurements and intra-frequency measurements. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the one or more L1 beam or cell specific measurements and the one or more L3 beam or cell specific measurements are based on one or more synchronization signal blocks (SSBs). ### Claim 7 (depends on 1) The apparatus of claim 1, wherein the one or more L1 beam or cell specific measurements and the one or more L3 beam or cell specific measurements are based on one or more channel state information (CSI) reference signals (RSs) (CSI-RSs). ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the one or more execution conditions is based on a beam quality of one or more beams. ### Claim 9 (depends on 1) The apparatus of claim 1, wherein the one or more execution conditions comprises a threshold number of beams having a beam measurement above a beam quality threshold. ### Claim 10 (depends on 1) The apparatus of claim 1, wherein the one or more execution conditions comprises a time window. ### Claim 11 (depends on 1) The apparatus of claim 1, wherein the one or more execution conditions is further based on one or more predictions associated with a beam-specific channel condition or a cell-specific channel condition. ### Claim 12 (depends on 1) The apparatus of claim 1, wherein the one or more execution conditions is further based on a maximum permissible exposure (MPE). ### Claim 13 (depends on 1) The apparatus of claim 1, further comprising a transceiver coupled to the at least one processor. ### Claim 14 An apparatus for wireless communication at a first base station, comprising: a memory; and at least one processor coupled to the memory and configured to: receive, from a second base station, one or more CHO candidate cell configurations; and transmit, to a user equipment (UE), a conditional handover (CHO) configuration comprising the one or more CHO candidate cell configurations associated with the second base station via a handover request acknowledge and one or more execution conditions associated with the first base station and including one or more CHO measurements, the one or more CHO measurements comprising one or more layer 1 (L1) beam or cell specific measurements or one or more layer 3 (L3) beam specific measurements, wherein the one or more execution conditions comprises a slope associated with the one or more L1 beam or cell specific measurements and the one or more L3 beam or cell specific measurements. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein the one or more CHO measurements comprises a combination of the one or more L1 beam or cell specific measurements and the one or more L3 beam specific measurements. ### Claim 16 (depends on 14) The apparatus of claim 14, wherein the one or more execution conditions are based on a primary cell. ### Claim 17 (depends on 14) The apparatus of claim 14, wherein the one or more execution conditions are based on a primary cell and one or more secondary cells. ### Claim 18 (depends on 14) The apparatus of claim 14, wherein the one or more L1 beam or cell specific measurements comprises inter-frequency measurements and intra-frequency measurements. ### Claim 19 (depends on 14) The apparatus of claim 14, wherein the one or more L1 beam or cell specific measurements and the one or more L3 beam or cell specific measurements are based on one or more synchronization signal blocks (SSBs). ### Claim 20 (depends on 14) The apparatus of claim 14, wherein the one or more L1 beam or cell specific measurements and the one or more L3 beam or cell specific measurements are based on one or more channel state information (CSI) reference signals (RSs) (CSI-RSs). ### Claim 21 (depends on 14) The apparatus of claim 14, wherein the one or more execution conditions is based on a beam quality of one or more beams. ### Claim 22 (depends on 14) The apparatus of claim 14, wherein the one or more execution conditions comprises a threshold number of beams having a beam measurement above a beam quality threshold. ### Claim 23 (depends on 14) The apparatus of claim 14, wherein the one or more execution conditions comprises a time window. ### Claim 24 (depends on 14) The apparatus of claim 14, wherein the one or more execution conditions is further based on one or more predictions associated with a beam-specific channel condition or a cell-specific channel condition. ### Claim 25 (depends on 14) The apparatus of claim 14, wherein the one or more execution conditions is further based on a maximum permissible exposure (MPE). ### Claim 26 (depends on 14) The apparatus of claim 14, further comprising a transceiver coupled to the at least one processor. ### Claim 27 A method for wireless communication at a user equipment (UE), comprising: receiving, from a first base station, a conditional handover (CHO) configuration comprising one or more CHO candidate cell configurations associated with a second base station via a handover request acknowledge and one or more execution conditions associated with the first base station and including one or more CHO measurements, the one or more CHO measurements comprising one or more layer 1 (L1) beam or cell specific measurements or one or more layer 3 (L3) beam specific measurements, wherein the one or more execution conditions comprises a slope associated with the one or more L1 beam or cell specific measurements and the one or more L3 beam or cell specific measurements; and detaching from a first cell associated with the first base station and synchronizing with a second cell associated with the second base station based on the one or more CHO measurements satisfying the one or more execution conditions, the second cell being one cell associated with the one or more CHO candidate cell configurations. ### Claim 28 A method for wireless communication at a first base station, comprising: receiving, from a second base station, one or more CHO candidate cell configurations; and transmitting, to a user equipment (UE), a conditional handover (CHO) configuration comprising the one or more CHO candidate cell configurations associated with the second base station via a handover request acknowledge and one or more execution conditions associated with the first base station and including one or more CHO measurements, the one or more CHO measurements comprising one or more layer 1 (L1) beam or cell specific measurements or one or more layer 3 (L3) beam specific measurements, wherein the one or more execution conditions comprises a slope associated with the one or more L1 beam or cell specific measurements and the one or more L3 beam or cell specific measurements.