# US 12,114,211 B2 · Device and method for supporting conditional handover in wireless communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,114,211 B2 - Document ID: US12114211B2 - Status: Granted - Kind: B2 - Application number: 17/634,128 - Filed: 2020-08-10 - Published: 2022-09-01 - Granted: 2024-10-08 - Earliest claimed: 2019-08-09 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Beomsik Bae; Soenghun Kim - Web page: https://patentgrep.com/patent/US12114211B2 ## CPC - H04W 36/0033: {with transfer of context information} - H04W 76/12: Setup of transport tunnels - H04W 36/087: {between radio units of access points} - H04W 36/362: {Conditional handover} - H04W 76/22: Manipulation of transport tunnels - H04W 88/085: {Access point devices with remote components} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract The disclosure relates to a 5th Generation (5G) or pre-5G communication system for supporting a higher data transfer rate after a 4th Generation (4G) communication system such as long term evolution (LTE). According to various embodiments of the disclosure, an operation method performed by a Center Unit (CU)-Control Plane (CP) of a candidate Base Station (BS) may include transmitting a first message for a bearer context setup request to a CU-User Plane (UP) of the candidate BS, wherein the first message includes information for indicating a conditional handover which is a handover performed by a User Equipment (UE) when at least one execution condition is satisfied, and receiving a second message for a bearer context setup response from the CU-UP. ## Claims ### Claim 1 A method performed by a central unit (CU)-control plane (CP) of a base station (BS), the method comprising: transmitting a first message for a bearer context setup request to a CU-user plane (UP) of the BS, wherein the first message includes information for indicating a conditional handover which is a handover executed by a user equipment (UE) when at least one execution condition is satisfied; and receiving a second message for a bearer context setup response from the CU-UP. ### Claim 2 (depends on 1) The method of claim 1, wherein inactivity monitoring of the CU-UP is performed after a bearer context modification procedure, based on the conditional handover. ### Claim 3 (depends on 1) The method of claim 1, wherein inactivity monitoring of the CU-UP is disabled specified procedures based on the conditional handover. ### Claim 4 (depends on 1) The method of claim 1, further comprising: transmitting a third message for a UE context setup request to a distributed unit (DU) of the BS, wherein the third message includes information for indicating the conditional handover; and receiving a fourth message for a UE context setup response from the DU, wherein the DU is configured to stop an operation for detecting a radio link failure (RLF), based on the conditional handover. ### Claim 5 A method performed by a central unit-user plane (CU-UP) of a base station (BS), the method comprising: receiving a first message for a bearer context setup request from a CU-CP of the BS, wherein the first message includes information for indicating a conditional handover which is a handover executed by a user equipment (UE) when at least one execution condition is satisfied; and transmitting a second message for a bearer context setup response to the CU-CP. ### Claim 6 (depends on 5) The method of claim 5, wherein inactivity monitoring of the CU-UP is performed after a bearer context modification procedure, based on the conditional handover. ### Claim 7 (depends on 5) The method of claim 5, wherein inactivity monitoring of the CU-UP is disabled specified procedures based on the conditional handover. ### Claim 8 A method performed by a distributed unit (DU) of a base station (BS), the method comprising: receiving a first message for a UE context setup request from a central unit-control plane (CU-CP) of the BS, wherein the first message includes information for indicating a conditional handover which is a handover executed by a UE when at least one execution condition is satisfied; and transmitting a second message for a UE context setup response to the CU-CP, wherein the DU is configured to stop an operation for detecting a radio link failure (RLF) based on the conditional handover. ### Claim 9 An apparatus of a central unit (CU)-control plane (CP) of a base station (BS), comprising: at least one transceiver; and at least one processor, wherein the at least one processor is configured to: control the at least one transceiver to transmit a first message for a bearer context setup request to a CU-user plane (UP) of the BS, wherein the first message includes information for indicating a conditional handover which is a handover executed by a user equipment (UE) when at least one execution condition is satisfied; and control the at least one transceiver to receive a second message for a bearer context setup response from the CU-UP. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein inactivity monitoring of the CU-UP is performed after a bearer context modification procedure, based on the conditional handover. ### Claim 11 (depends on 9) The apparatus of claim 9, wherein inactivity monitoring of the CU-UP is disabled specified procedures based on the conditional handover. ### Claim 12 (depends on 9) The apparatus of claim 9, wherein the at least one processor is further configured to: control the at least one transceiver to transmit a third message for a UE context setup request to a distributed unit (DU) of the BS, wherein the third message includes information for indicating the conditional handover, and control the at least one transceiver to receive a fourth message for a UE context setup response from the DU, and wherein the DU is configured to stop an operation for detecting a radio link failure (RLF), based on the conditional handover. ### Claim 13 An apparatus of a central unit-user plane (CU-UP) of a base station (BS), the apparatus comprising: at least one transceiver; and at least one processor, wherein the at least one processor is configured to control the at least one transceiver to receive a first message for a bearer context setup request from a CU-CP of the BS, wherein the first message includes information for indicating a conditional handover which is a handover executed by a user equipment (UE) when at least one execution condition is satisfied; and control the at least one transceiver to transmit a second message for a bearer context setup response to the CU-CP. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein inactivity monitoring of the CU-UP is performed after a bearer context modification procedure, based on the conditional handover. ### Claim 15 (depends on 13) The apparatus of claim 13, wherein inactivity monitoring of the CU-UP is disabled specified procedures based on the conditional handover. ### Claim 16 An apparatus of a distributed unit (DU) of a base station (BS), the apparatus comprising: at least one transceiver; and at least one processor, wherein the at least one processor is configured to control the at least one transceiver to receive a first message for a UE context setup request from a central unit-control plane (CU-CP) of the BS, wherein the first message includes information for indicating a conditional handover which is a handover executed by a UE when at least one execution condition is satisfied, and control the at least one transceiver to transmit a second message for a UE context setup response to the CU-CP, and wherein the DU is configured to stop an operation for detecting a radio link failure, RLF, based on the conditional handover.