CG-CandidateList

inter-node RRC message · TS 38.331 v19.4.0 (2026-09) · clause 11.2.2

CG-CandidateList is an inter-node RRC message of 3GPP TS 38.331 (38331), the 5G NR Radio Resource Control (RRC) protocol.

First seen v17.0.0 (2022-04) · Last changed v17.1.0 (2022-07)

Definition

This message is used to transfer the SCG radio configuration for one or more candidate cells for Conditional PSCell Addition (CPA), Conditional PSCell Change (CPC), inter-SN subsequent CPAC, or CHO with candidate SCG(s) as generated by the candidate target SgNB, or the serving SgNB in case of intra-SN subsequent CPAC configuration(s) which are delivered embedded within an RRC message generated by the MN.

CG-CandidateList ::=                SEQUENCE {
    criticalExtensions                  CHOICE {
        c1                                  CHOICE{
            cg-CandidateList-r17                CG-CandidateList-r17-IEs,
            spare3 NULL, spare2 NULL, spare1 NULL
        },
        criticalExtensionsFuture            SEQUENCE {}
    }
}

Candidate change requests of v17.1.0

The CRs whose title or cover names this change, strong and likely matches only.

CR 3137 r2 (likely): Corrections for further MRDC enhancements

Fields (7)

Field	Description
criticalExtensions CHOICE {
c1 CHOICE{
cg-CandidateList-r17 CG-CandidateList-r17-IEs since v17.1.0
spare3 NULL
spare2 NULL
spare1 NULL
criticalExtensionsFuture SEQUENCE {}

Fields of CG-CandidateList-r17-IEs (3)

Field	Description
cg-CandidateToAddModList-r17 SEQUENCE (SIZE (1..maxNrofCondCells-r16)) OF CG-CandidateInfo-r17 · OPTIONAL since v17.1.0	Contains information regarding candidate target cells to be added or modified for Conditional PSCell Addition (CPA), Conditional PSCell Change (CPC), inter-SN subsequent CPAC, or CHO with candidate SCG(s) from the candidate target secondary node or from the serving secondary node for intra-SN subsequent CPAC in configuration(s) which are delivered embedded within an RRC message generated by the MN.
cg-CandidateToReleaseList-r17 SEQUENCE (SIZE (1..maxNrofCondCells-r16)) OF CG-CandidateInfoId-r17 · OPTIONAL since v17.1.0	Contains information regarding candidate target cells for CPA, CPC, inter-SN subsequent CPAC, or CHO with candidate SCG(s) to be removed from the candidate target secondary node or from the serving secondary node for intra-SN subsequent CPAC in configuration(s) which are delivered embedded within an RRC message generated by the MN. This list is not used in CPA, CPC, subsequent CPAC, or CHO with candidate SCG(s) preparation.
nonCriticalExtension SEQUENCE {} · OPTIONAL since v17.1.0

Uses (1)

CG-CandidateList-r17-IEs