3 Definitions and abbreviations
24.3153GPPIP Multimedia Subsystem (IMS) Operator Determined Barring (ODB)Release 17Stage 3: protocol specificationTS
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].
B2BUA, dialog, header, header field, SIP response, SIP request, session: definitions in IETF RFC 3261 [3] apply.
incoming initial request: all requests intended to initiate either a dialog or a standalone transaction terminated by the served user
incoming communication: communication destined to the served user
indication that this communication is a Premium Rate Communication: the Request-URI of the received INVITE request includes the " premium-rate" tel URI parameter set to either the value "information" or the value "entertainment".
in progress communication: outgoing or incoming communication for which the initiating request has been forwarded to the terminating UE.
outgoing communication: communication outgoing from the user side of the interface
supplementary service: see ITU‑T Recommendation I.210 [5], clause 2.4.
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AS Application Server
CB Communication Barring
CDIV Communication DIVersion services
ECT Explicit Communication Transfer
HPLMN Home Public Land Mobile Network
HSS Home Subscriber Server
IP Internet Protocol
ODB Operator Determined Barring
SDP Session Description Protocol
SIP Session Initiation Protocol
UE User Equipment