UECapabilityEnquiry

RRC message · TS 38.331 v19.4.0 (2026-09) · clause 6.2.2

UECapabilityEnquiry is an RRC message of 3GPP TS 38.331 (38331), the 5G NR Radio Resource Control (RRC) protocol.

First seen v15.3.0 (2018-09) · Last changed v18.4.0 (2024-12), in UECapabilityEnquiry-v1610-IEs

Definition

The UECapabilityEnquiry message is used to request UE radio access capabilities for NR as well as for other RATs.

UECapabilityEnquiry ::=             SEQUENCE {
    rrc-TransactionIdentifier           RRC-TransactionIdentifier,
    criticalExtensions                  CHOICE {
        ueCapabilityEnquiry                 UECapabilityEnquiry-IEs,
        criticalExtensionsFuture            SEQUENCE {}
    }
}

Fields (4)

Field	Description
rrc-TransactionIdentifier RRC-TransactionIdentifier
criticalExtensions CHOICE {
ueCapabilityEnquiry UECapabilityEnquiry-IEs
criticalExtensionsFuture SEQUENCE {}

Fields of UECapabilityEnquiry-IEs (3)

Field	Description
ue-CapabilityRAT-RequestList UE-CapabilityRAT-RequestList
lateNonCriticalExtension OCTET STRING · OPTIONAL
ue-CapabilityEnquiryExt OCTET STRING (CONTAINING UECapabilityEnquiry-v1560-IEs) · OPTIONAL Need N since v15.6.0

Fields of UECapabilityEnquiry-v1560-IEs (2)

Field	Description
capabilityRequestFilterCommon UE-CapabilityRequestFilterCommon · OPTIONAL Need N since v15.6.0
nonCriticalExtension UECapabilityEnquiry-v1610-IEs · OPTIONAL since v15.6.0

Fields of UECapabilityEnquiry-v1610-IEs (2)

Field	Description
rrc-SegAllowed-r16 ENUMERATED {enabled} · OPTIONAL Need N since v16.1.0	This field is used to enable the UL message segment transfer for UECapabilityInformation message. The field is present only if rrc-MaxCapaSegAllowe d is not present.
nonCriticalExtension UECapabilityEnquiry-v17b0-IEs · OPTIONAL since v16.1.0

Fields of UECapabilityEnquiry-v17b0-IEs (2)

Field	Description
rrc-MaxCapaSegAllowed-r17 INTEGER (2..16) · OPTIONAL Need N since v17.11.0	This field is used to enable the UL message segment transfer for UECapabilityInformation message with the number of segments allowed by the network. The field is present only if rrc-SegAllowed is not present.
nonCriticalExtension SEQUENCE {} · OPTIONAL since v17.11.0

Used by (1)

DL-DCCH-MessageType