3 Definitions, symbols and abbreviations

21.2023GPPRelease 17Technical Specifications and Technical Reports relating to the Common IP Multimedia Subsystem (IMS)TS

3.1 Definitions

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

3.2 Symbols

(None)

3.3 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].

NGN Next Generation Network

R1 Release 1

R2 Release 2

TISPAN Telecommunications and Internet converged Services and Protocols for Advanced Networks