3 Definitions and abbreviations
24.6153GPPCommunication Waiting (CW) using IP Multimedia (IM) Core Network (CN) subsystemProtocol specificationRelease 17TS
3.1 Definitions
For definitions used in this document see:
– 3GPP TS 22.173 [1]
User B: User B is the user who reacts to the communication waiting at subscriber B. User B is the served user for the communication waiting service.
User C: User C is the user who has originated a communication to subscriber B which causes the CW supplementary service to be invoked.
User A: User A is a user (several such users may exist) who is engaged in a communication with User B (this communication can be in any state).
Network determined user busy: See 3GPP TS 22.173 [1] Annex Da.
Approaching Network determined user busy: See 3GPP TS 22.173 [1] Annex Da.
User determined user busy: See 3GPP TS 22.228 [6].
Network based CW: CW when the network detects the CW condition and informs the UE about the conditon.
Terminal based CW: CW when the UE detects the CW condition and informs the network about the condition.
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AoC Advice of Charge
CAT Customized Alerting Tones
CCBS Completion of Communication sessions to Busy Subscriber
CD Communication Deflection
CDIV Communication Diversion
CFB Communication Forwarding Busy
CFNL Communication Forwarding on Not Logged-in
CFNR Communication Forwarding No Reply
CFU Communication Forwarding Unconditional
FA Flexible Alerting
OIP Originating Identification Presentation
OIR Originating Identification Restriction
TIP Terminating Identification Presentation
TIR Terminating Identification Restriction
CW Communication Waiting
GRUU Globally Routable User agent URI
HOLD Communication Hold
IFC Initial Filter Criteria
IMS IP Multimedia Subsystem
IP Internet Protocol
ISDN Integrated Services Digital Network
MCID Malicious Communication Identification
MiD Multi-iDentity
MuD Multi-Device
NDUB Network Determined User Busy
SIP Session Initiation Protocol
UDUB User Determined User Busy
UE User Equipment