# US 12,004,032 B2 · Nested conditional mobility procedures > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,032 B2 - Document ID: US12004032B2 - Status: Granted - Kind: B2 - Application number: 17/398,876 - Filed: 2021-08-10 - Published: 2023-02-16 - Granted: 2024-06-04 - Earliest claimed: 2021-08-10 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Rajeev Kumar; Punyaslok Purkayastha; Ozcan Ozturk; Aziz Gholmieh - Web page: https://patentgrep.com/patent/US12004032B2 ## CPC - H04W 36/00837: {Determination of triggering parameters for hand-off} - H04W 36/0061: {of neighbour cell information} - H04W 36/00692: {using simultaneous multiple data streams, e.g. cooperative multipoint [CoMP], carrier aggregation [CA] or multiple input multiple output [MIMO] (allocation of physical resources in CoMP or in CA H04L5/0035)} - H04W 36/00838: {Resource reservation for handover} - H04W 36/305: {Handover due to radio link failure (control signalling for hand-off failure H04W36/0079)} - H04W 36/0016: {Hand-off preparation specially adapted for end-to-end data sessions} - 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 apparatus, methods, processing systems, and computer readable mediums for a nested conditional mobility procedure. In some cases, a method for wireless communications by a UE generally includes receiving configuration information configuring the UE for conditional handover (CHO) from a source master node (S-MN) to a target master node (T-MN) and for conditional primary secondary cell (PSCell) addition or change (CPAC) and performing a nested procedure based on an evaluation of conditions for both CHO and CPAAC in accordance with the configuration information. ## Claims ### Claim 1 An apparatus for wireless communications, comprising: a memory comprising instructions; and one or more processors coupled with the memory and configured to execute the instructions and cause the apparatus to: receive configuration information configuring the apparatus for conditional handover (CHO) from a source master node (S-MN) to a target master node (T-MN) and for conditional primary secondary cell (PSCell) addition or change (CPAC); and perform a nested procedure based on an evaluation of conditions for both CHO and CPAC in accordance with the configuration information, wherein the one or more processors are configured to cause the apparatus to: initiate a CHO procedure in parallel with a CPAC procedure if the evaluation of the conditions triggers both the CHO procedure and the CPAC procedure; perform the CPAC procedure, if the evaluation of the conditions indicates the CPAC procedure is triggered before a CHO procedure, without regard to a radio link failure (RLF) at the S-MN; perform the CPAC procedure even if the evaluation of the conditions indicates the CHO procedure is triggered; perform the CHO procedure if the evaluation of the conditions indicates the CHO procedure is triggered while the CPAC procedure is in progress; and recover a primary cell (PCell) using master cell group (MCG) failure information if the RLF is detected during the CPAC procedure. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the one or more processors being configured to perform the nested procedure comprises the one or more processors being configured to at least one of: complete the CHO procedure if the evaluation of the conditions indicates the CHO procedure is triggered before the CPAC procedure is triggered; or complete the CPAC procedure if the evaluation of the conditions indicates the CPAC procedure is triggered before the CHO procedure is triggered. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the one or more processors are further configured to cause the apparatus to evaluate nested CPAC conditions after completing the CHO procedure. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the one or more processors being configured to cause the apparatus to receive the configuration information comprises the one or more processors being configured to cause the apparatus to receive a radio resource control (RRC) reconfiguration message with a CPAC configuration and a CHO configuration containing a conditional PSCell change (CPC) configuration. ### Claim 5 (depends on 1) The apparatus of claim 1, further comprising a transceiver via which the configuration information is received, wherein the apparatus is configured as a user equipment. ### Claim 6 A source master node (S-MN), comprising: a transceiver; a memory comprising instructions; and one or more processors configured to execute the instructions and cause the S-MN to: transmit, via the transceiver, configuration information configuring a user equipment (UE) for conditional handover (CHO) from the S-MN to a target master node (T-MN) and for conditional primary secondary cell (PSCell) addition or change (CPAC); participate in a nested procedure based on an evaluation of conditions for both CHO and CPAC by the UE in accordance with the configuration information; and notify one or more T-MNs of at least one target secondary node (T-SN) cell identity upon initialization or completion of a CPAC procedure, wherein: the configuration information configures the UE to perform the nested procedure by performing the CPAC procedure if the evaluation of the conditions indicates the CPAC procedure is triggered before a CHO procedure, without regard to a radio link failure (RLF) at the S-MN. ### Claim 7 (depends on 6) The S-MN of claim 6, wherein the one or more processors being configured to cause the S-MN to transmit the configuration information comprises the one or more processors being configured to cause the S-MN to transmit a radio resource control (RRC) reconfiguration message with a CPAC configuration and a CHO configuration containing a conditional PSCell change (CPC) configuration. ### Claim 8 A method for wireless communications at a user equipment (UE), comprising: receiving configuration information configuring the UE for conditional handover (CHO) from a source master node (S-MN) to a target master node (T-MN) and for conditional primary secondary cell (PSCell) addition or change (CPAC); and performing a nested procedure based on an evaluation of conditions for both CHO and CPAC in accordance with the configuration information, the performing the nested procedure comprises: performing a CPAC procedure, if the evaluation of the conditions indicates the CPAC procedure is triggered before a CHO procedure, without regard to a radio link failure (RLF) at the S-MN; performing the CPAC procedure even if the evaluation of the conditions indicates the CHO procedure is triggered; performing the CHO procedure if the evaluation of the conditions indicates the CHO procedure is triggered while the CPAC procedure is in progress; and recovering a primary cell (PCell) using master cell group (MCG) failure information if the RLF is detected during the CPAC procedure. ### Claim 9 (depends on 8) The method of claim 8, wherein performing the nested procedure comprises at least one of: completing the CHO procedure if the evaluation of the conditions indicates the CHO procedure is triggered before the CPAC procedure is triggered; or completing the CPAC procedure if the evaluation of the conditions indicates the CPAC procedure is triggered before the CHO procedure is triggered. ### Claim 10 (depends on 8) The method of claim 8, wherein performing the nested procedure comprises prioritizing the CHO procedure over the CPAC procedure, even if the evaluation of the conditions indicates the CPAC procedure is triggered before the CHO procedure. ### Claim 11 (depends on 8) The method of claim 8, wherein performing the nested procedure comprises performing the CHO procedure and the CPAC procedure in parallel if the evaluation of the conditions triggers both the CHO procedure and the CPAC procedure. ### Claim 12 (depends on 8) The method of claim 8, wherein performing the nested procedure comprises: initiating the CPAC procedure if the evaluation of the conditions indicates the CPAC procedure is triggered before the CHO procedure and prioritizing the CHO procedure if the evaluation of the conditions subsequently indicates the CHO procedure is triggered after the CPAC procedure. ### Claim 13 (depends on 12) The method of claim 12, wherein prioritizing the CHO procedure comprises: pausing or suspending the CPAC procedure; and performing the CHO procedure while the CPAC procedure is paused or suspended. ### Claim 14 An apparatus for wireless communications, comprising: a memory comprising instructions; and one or more processors configured to execute the instructions and cause the apparatus to: receive configuration information configuring the apparatus for conditional handover (CHO) from a source master node (S-MN) to a target master node (T-MN) and for conditional primary secondary cell (PSCell) addition or change (CPAC); and perform a nested procedure based on an evaluation of conditions for both CHO and CPAC in accordance with the configuration information, wherein the one or more processors are configured to cause the apparatus to: perform a CPAC procedure if the evaluation of the conditions indicates the CPAC procedure is triggered before a CHO procedure, without regard to a radio link failure (RLF) at the S-MN; perform the CPAC procedure even if the evaluation of the conditions indicates the CHO procedure is triggered; and recover a primary cell (PCell) using master cell group (MCG) failure information if the RLF is detected during the CPAC procedure. ### Claim 15 (depends on 14) The apparatus of claim 14, further comprising a transceiver via which the configuration information is received, wherein the apparatus is configured as a user equipment. ### Claim 16 (depends on 14) The apparatus of claim 14, wherein the one or more processors being configured to cause the apparatus to receive the configuration information comprises the one or more processors being configured to cause the apparatus to receive a radio resource control (RRC) reconfiguration message with a CPAC configuration and a CHO configuration containing a conditional PSCell change (CPC) configuration. ### Claim 17 (depends on 14) The apparatus of claim 14, wherein the one or more processors being configured to perform the nested procedure comprises the one or more processors being configured to at least one of: complete the CHO procedure if the evaluation of the conditions indicates the CHO procedure is triggered before the CPAC procedure is triggered; or complete the CPAC procedure if the evaluation of the conditions indicates the CPAC procedure is triggered before the CHO procedure is triggered. ### Claim 18 (depends on 14) The apparatus of claim 14, wherein the one or more processors are further configured to cause the apparatus to evaluate nested CPAC conditions after completing the CHO procedure. ### Claim 19 (depends on 14) The apparatus of claim 14, wherein the one or more processors being configured to cause the apparatus to perform the nested procedure comprises the one or more processors being configured to cause the apparatus to perform the CHO procedure and CPAC procedure in parallel if the evaluation of the conditions triggers both the CHO procedure and the CPAC procedure. ### Claim 20 An apparatus for wireless communications, comprising: a memory comprising instructions; and one or more processors configured to execute the instructions and cause the apparatus to: receive configuration information configuring the apparatus for conditional handover (CHO) from a source master node (S-MN) to a target master node (T-MN) and for conditional primary secondary cell (PSCell) addition or change (CPAC); and perform a nested procedure based on an evaluation of conditions for both CHO and CPAC in accordance with the configuration information, wherein the one or more processors being configured to cause the apparatus to: perform a CPAC procedure if the evaluation of the conditions indicates the CPAC procedure is triggered before a CHO procedure, without regard to a radio link failure (RLF) at the S-MN; and recover a primary cell (PCell) using master cell group (MCG) failure information if the RLF is detected during the CPAC procedure. ### Claim 21 (depends on 20) The apparatus of claim 20, further comprising a transceiver via which the configuration information is received, wherein the apparatus is configured as a user equipment. ### Claim 22 (depends on 20) The apparatus of claim 20, wherein the one or more processors being configured to cause the apparatus to receive the configuration information comprises the one or more processors being configured to cause the apparatus to receive a radio resource control (RRC) reconfiguration message with a CPAC configuration and a CHO configuration containing a conditional PSCell change (CPC) configuration. ### Claim 23 (depends on 20) The apparatus of claim 20, wherein the one or more processors being configured to perform the nested procedure comprises the one or more processors being configured to at least one of: complete the CHO procedure if the evaluation of the conditions indicates the CHO procedure is triggered before the CPAC procedure is triggered; or complete the CPAC procedure if the evaluation of the conditions indicates the CPAC procedure is triggered before the CHO procedure is triggered. ### Claim 24 (depends on 20) The apparatus of claim 20, wherein the one or more processors are further configured to cause the apparatus to evaluate nested CPAC conditions after completing the CHO procedure. ### Claim 25 (depends on 20) The apparatus of claim 20, wherein the one or more processors being configured to cause the apparatus to perform the nested procedure comprises the one or more processors being configured to cause the apparatus to perform the CHO procedure and CPAC procedure in parallel if the evaluation of the conditions triggers both the CHO procedure and the CPAC procedure. ### Claim 26 A source master node (S-MN), comprising: a transceiver; a memory comprising instructions; and one or more processors configured to execute the instructions and cause the S-MN to: transmit, via the transceiver, configuration information configuring a user equipment (UE) for conditional handover (CHO) from the S-MN to a target master node (T-MN) and for conditional primary secondary cell (PSCell) addition or change (CPAC); participate in a nested procedure based on an evaluation of conditions for both CHO and CPAC by the UE in accordance with the configuration information; and notify one or more T-MNs of at least one target secondary node (T-SN) cell identity upon initialization of a CPAC procedure, wherein the configuration information configures the UE to perform the nested procedure by: initiating the CPAC procedure, if the evaluation of the conditions indicates the CPAC procedure is triggered before a CHO procedure; and prioritizing the CHO procedure, if the evaluation of the conditions subsequently indicates the CHO procedure is triggered after the CPAC procedure. ### Claim 27 (depends on 26) The S-MN of claim 26, wherein the one or more processors being configured to cause the S-MN to transmit the configuration information comprises the one or more processors being configured to cause the S-MN to transmit a radio resource control (RRC) reconfiguration message with a CPAC configuration and a CHO configuration containing a conditional PSCell change (CPC) configuration.