3 Definitions and abbreviations

38.4253GPPNG-RANNR user plane protocolRelease 17TS

3.1 Definitions

For the purposes of the present document, the terms and definitions given in 3GPP 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 3GPP TR 21.905 [1].

Corresponding node: a node interacting with a node hosting PDCP for flow control. In an IAB network, this is the IAB-DU serving the UE for the corresponding data radio bearer.

eNB-CP: as defined in TS 36.401 [9].

eNB-UP: as defined in TS 36.401 [9].

Master node: as defined in TS 37.340 [3].

Secondary node: as defined in TS 37.340 [3].

3.2 Abbreviations

For the purposes of the present document, the abbreviations given in 3GPP 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 3GPP TR 21.905 [1].

EN-DC E-UTRA-NR Dual Connectivity

IAB Integrated Access and Backhaul

MBS Multicast/Broadcast Service

MR-DC Multi-RAT Dual Connectivity

MRB MBS Radio Bearer

PTM Point To Multipoint