Section: 5.3.5.13 Conditional Reconfiguration 5.3.5.13.1 General
Content: The network configures the UE with one or more candidate target SpCells in the conditional reconfiguration. The UE evaluates the condition of each configured candidate target SpCell. The UE applies the conditional reconfiguration associated with one of the target SpCells which fulfils associated execution condition. The network can also configure the UE with one or more candidate target PCells associated with one or more candidate target PSCells. The UE evaluates the conditions for the candidate target PCells and the associated candidate target PSCells in parallel and applies a target configuration that include PCell and PSCell for which the associated execution conditions are fullfiled. If there are multiple candidate PSCells associated with one candidate target PCell, the network provides multiple conditional configurations for the same candidate target PCell, i.e., each configuration contains one MCG configuration (for the same candidate target PCell) and one SCG configuration (for one of the multiple associated candidate PSCells). For this case, the network may also provide a complementary CHO only configuration, i.e., there is execution condition only for candidate PCell. The network provides the configuration parameters for the target SpCell(s) in the condRRCReconfig. In NR-DC, the UE may receive two independent conditionalReconfiguration: - a conditionalReconfiguration associated with MCG, that is included in the RRCReconfiguration message received via SRB1; and - a conditionalReconfiguration, associated with SCG, that is included in the RRCReconfiguration message received via SRB3, or, alternatively, included within a RRCReconfiguration message embedded in a RRCReconfiguration message received via SRB1. In this case: - the UE maintains two independent VarConditionalReconfig, one associated with each conditionalReconfiguration; - the UE independently performs all the procedures in clause 5.3.5.13 for each conditionalReconfiguration and the associated VarConditionalReconfig, unless explicitly stated otherwise; - the UE performs the procedures in clause 5.5 for the VarConditionalReconfig associated with the same cell group like the measConfig. In EN-DC, the VarConditionalReconfig is associated with the SCG. In NE-DC and when no SCG is configured, the VarConditionalReconfig is associated with the MCG. The UE performs the following actions based on a received ConditionalReconfiguration IE: 1> if the ConditionalReconfiguration contains the condReconfigToRemoveList: 2> perform conditional reconfiguration removal procedure as specified in 5.3.5.13.2; 1> if the ConditionalReconfiguration contains the condReconfigToAddModList: 2> perform conditional reconfiguration addition/modification as specified in 5.3.5.13.3; 1> if the ConditionalReconfiguration contains the scpac-ReferenceConfiguration: 2> perform subsequent CPAC reference configuration addition/removal as specified in 5.3.5.13.6; 1> if the ConditionalReconfiguration contains the sk-CounterConfiguration: 2> perform sk-CounterList addition/modification/removal as specified in 5.3.5.13.7; 1> if the ConditionalReconfiguration contains the servingSecurityCellSetId: 2> if the current VarServingSecurityCellSetID includes servingSecurityCellSetId: 3> replace the servingSecurityCellSetId value within VarServingSecurityCellSetID with the received servingSecurityCellSetID; 2> else: 3> store the received servingSecurityCellSetId within VarServingSecurityCellSetID.