3 Definitions, symbols and abbreviations
36.4253GPPEvolved Universal Terrestrial Radio Access Network (E-UTRAN)Release 17TSX2 interface user plane protocol
3.1 Definitions
For the purposes of the present document, the terms and definitions 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].
Master eNB: as defined in TS 36.300 [2].
Secondary eNB: as defined in TS 36.300 [2].
Split bearer: as defined in TS 36.300 [2].
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].
DC Dual Connectivity
DL Downlink
E-RAB E-UTRAN Radio Access Bearer
MeNB Master eNB
SeNB Secondary eNB
UL Uplink
UP User Plane
X2 UP X2 User Plane