UECapabilityEnquirySidelink

PC5-RRC message · TS 38.331 v19.4.0 (2026-09) · clause 6.6.2

UECapabilityEnquirySidelink is a PC5-RRC message of 3GPP TS 38.331 (38331), the 5G NR Radio Resource Control (RRC) protocol.

First seen v16.0.0 (2020-04) · Last changed v17.1.0 (2022-07)

Definition

The UECapabilityEnquirySidelink message is used to request UE sidelink capabilities. It is only applied to unicast of NR sidelink communication.

UECapabilityEnquirySidelink ::=         SEQUENCE {
    rrc-TransactionIdentifier-r16           RRC-TransactionIdentifier,
    criticalExtensions                      CHOICE {
        ueCapabilityEnquirySidelink-r16         UECapabilityEnquirySidelink-r16-IEs,
        criticalExtensionsFuture                SEQUENCE {}
    }
}

Candidate change requests of v17.1.0

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

CR 3185 (likely): Miscellaneous corrections on TS 38.331 for NR V2X

Fields (4)

Field	Description
rrc-TransactionIdentifier-r16 RRC-TransactionIdentifier
criticalExtensions CHOICE {
ueCapabilityEnquirySidelink-r16 UECapabilityEnquirySidelink-r16-IEs
criticalExtensionsFuture SEQUENCE {}

Fields of UECapabilityEnquirySidelink-r16-IEs (4)

Field	Description
frequencyBandListFilterSidelink-r16 FreqBandList · OPTIONAL Need N since v16.9.0	This field is used to indicate frequency bands for which the peer UE is requested to provide supported bands and band combinations for NR sidelink communications. The UE always provides this field.
ue-CapabilityInformationSidelink-r16 OCTET STRING · OPTIONAL Need N since v16.9.0	This field indicates the UECapabilityInformationSidelink message to provide the UE sidelink capability, which can be optionally sent together with UECapabilityEnquirySidelink .
lateNonCriticalExtension OCTET STRING · OPTIONAL since v16.9.0
nonCriticalExtension SEQUENCE{} · OPTIONAL since v16.9.0

Used by (1)

SCCH-MessageType