IABOtherInformation (IABOtherInformation-r16)

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

IABOtherInformation-r16 is an RRC message of 3GPP TS 38.331 (38331), the 5G NR Radio Resource Control (RRC) protocol.

First seen v16.1.0 (2020-07) · Last changed v18.2.0 (2024-07)

Definition

The IABOtherInformation message is used by IAB-MT to request the network to allocate IP addresses for the collocated IAB-DU or inform the network about IP addresses allocated to the collocated IAB-DU.

IABOtherInformation-r16 ::=     SEQUENCE {
    dummy                           RRC-TransactionIdentifier,
    criticalExtensions              CHOICE {
        iabOtherInformation-r16         IABOtherInformation-r16-IEs,
        criticalExtensionsFuture        SEQUENCE {}
    }
}

Candidate change requests of v18.2.0

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

CR 4704 r1 (strong): Dummy the rrc-TransactionIdentifier field from IABOtherInformation

Fields (4)

Field	Description
dummy RRC-TransactionIdentifier since v16.17.0	This field is not used in the specification and network ignores the received value.
criticalExtensions CHOICE {
iabOtherInformation-r16 IABOtherInformation-r16-IEs
criticalExtensionsFuture SEQUENCE {}

Fields of IABOtherInformation-r16-IEs (13)

Field	Description
ip-InfoType-r16 CHOICE { since v16.2.0
iab-IP-Request-r16 SEQUENCE { since v16.2.0
iab-IPv4-AddressNumReq-r16 IAB-IP-AddressNumReq-r16 · OPTIONAL since v16.2.0	This field is used to request the numbers of IPv4 address per specific usage. The specific usages include F1-C traffic, F1-U traffic, non-F1 traffic and all traffic.
iab-IPv6-AddressReq-r16 CHOICE { · OPTIONAL since v16.2.0
iab-IPv6-AddressNumReq-r16 IAB-IP-AddressNumReq-r16 since v16.2.0	This field is used to request the numbers of IPv6 address per specific usage. The specific usages include F1-C traffic, F1-U traffic, non-F1 traffic and all traffic.
iab-IPv6-AddressPrefixReq-r16 IAB-IP-AddressPrefixReq-r16 since v16.2.0	This field is used to request the prefix of IPv6 address per specific usage. The specific usages include F1-C traffic, F1-U traffic, non-F1 traffic and all traffic.
iab-IP-Report-r16 SEQUENCE { since v16.2.0
iab-IPv4-AddressReport-r16 IAB-IP-AddressAndTraffic-r16 · OPTIONAL since v16.2.0	This field is used to report the IPv4 address per specific usage assigned by OAM for IAB-DU. The specific usages include F1-C traffic, F1-U traffic, non-F1 traffic and all traffic.
iab-IPv6-Report-r16 CHOICE { · OPTIONAL since v16.2.0
iab-IPv6-AddressReport-r16 IAB-IP-AddressAndTraffic-r16 since v16.2.0	This field is used to report the IPv6 address per specific usage assigned by OAM for IAB-DU. The specific usages include F1-C traffic, F1-U traffic, non-F1 traffic and all traffic.
iab-IPv6-PrefixReport-r16 IAB-IP-PrefixAndTraffic-r16 since v16.2.0	This field is used to report the prefix of IPv6 address per specific usage assigned by OAM for IAB-DU. The specific usages include F1-C traffic, F1-U traffic, non-F1 traffic and all traffic.
lateNonCriticalExtension OCTET STRING · OPTIONAL
nonCriticalExtension SEQUENCE {} · OPTIONAL

Used by (1)

UL-DCCH-MessageType