3 Definitions of terms, symbols and abbreviations

38.3403GPPBackhaul Adaptation Protocol (BAP) specificationNRRelease 17TS

3.1 Terms

For the purposes of the present document, the terms given in TR 21.905 [1] and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905 [1].

BH RLC channel: an RLC channel between two nodes, which is used to transport backhaul packets, as defined in TS 38.300 [2].

Boundary IAB-node: an IAB-node with one RRC interface terminating at a different IAB-donor-CU than the F1 interface, as defined in TS 38.401 [6].

Egress BH RLC channel: a BH RLC channel on which a packet is transmitted by a node.

Egress link: a radio link on which a packet is transmitted by a node.

F1-terminating donor: refers to the IAB-donor that terminates F1 for the boundary IAB-node, as defined in TS 38.401 [6].

IAB-donor: as defined in TS 38.300 [2].

IAB-donor-DU: as defined in TS 38.401 [6].

IAB-node: as defined in TS 38.300 [2].

Ingress BH RLC channel: a BH RLC channel on which a packet is received by a node.

Ingress link: a radio link on which a packet is received by a node.

Non-F1-terminating donor: refers to the IAB-donor that has an RRC connection with the boundary node but does not terminate F1 with this boundary IAB-node, as defined in TS 38.401 [6].

3.2 Abbreviations

For the purposes of the present document, the abbreviations given in TR 21.905 [1] and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905 [1].

BH Backhaul

DSCP Differentiated Services Code Point

IAB Integrated Access and Backhaul

MT Mobile Termination

TEID Tunnel Endpoint Identifier