3 Definitions, symbols and abbreviations

32.2603GPPCharging managementIP Multimedia Subsystem (IMS) chargingRelease 17Telecommunication managementTS

3.1 Definitions

For the purposes of the present document, the following terms and definitions given in TR 21.905 [100] and TS 32.240 [1] apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905 [100].

3.2 Symbols

For the purposes of the present document, the following symbols apply:

Bi Reference point for the CDR file transfer from the IMS CGF to the BD.

Ga Reference point for CDR transfer between a CDF and CGF.

Nchf Service based interface exhibited by CHF.

N45 Reference point between IMS Node and the CHF.

Rf Offline Charging Reference Point between an IMS Network Entity or an AS and CDF

Ro Online Charging Reference Point between an AS or MRFC and IMS-GWF and the OCS

3.3 Abbreviations

For the purposes of the present document, the abbreviations given in TR 21.905 [100] 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 [100].

5GS 5G System

ABNF Augmented Backus-Naur Form

ACA Accounting-Answer

ACR Accounting-Request

AS Application Server

ATCF Access Transfer Control Function

ATGW Access Transfer Gateway

AVP Attribute Value Pair

B2BUA Back-to-Back User Agent

BGCF Breakout Gateway Control Function

BS Billing System

CCA Credit-Control-Answer

CCF Charging Collection Function

CCR Credit-Control-Request

CDF Charging Data Function

CDIV Communication Diversion

CDR Charging Data Record

CGF Charging Gateway Function

CHF Charging Function

CONF Conference

CPCF Content Provider Charging Function

CSCF Call Session Control Function (I-Interrogating; P-Proxy; and S-Serving)

EATF Emergency Access Transfer Function

ECF Event Charging Function

ECUR Event Charging with Unit Reservation

IBCF Interconnect Border Control Function

IEC Immediate Event Charging

IMS IP Multimedia Subsystem

IMS-AGW IMS Access Media Gateway

IMS-ALG IMS – Application Level Gateway

IMS-GWF IMS Gateway Function

IOI Inter Operator Identifier

ISC IMS Service Control

LBO Local Break Out

MGCF Media Gateway Control Function

MMTel MultiMedia Telephony

MRFC Media Resource Function Controller

NNI Network to Network Interface

MRFP Multimedia Resource Function Processor

NCGI NR Cell Global Identity

NCI NR Cell Identity

NetLoc Network provided Location informationNR New Radio

OCS Online Charging System

OMR Optimal Media Routing

PCRF Policy and Charging Rules Function

PCF Policy Control Function

RTTI Real-time Transfer of Tariff Information

SCCF Subscriber Content Charging Function

SCUR Session Charging with Unit Reservation

SDP Session Description Protocol

SMF Session Management Function

SIP Session Initiation Protocol

TF Transit Functions

TIP Terminating Identity Presentation

TIR Terminating Identity Restriction

TRF Transit and Roaming Function

TrGW Transition GateWay

UA User Agent

UE User Equipment

VCC Voice Call Continuity

VCS Voice Call Service

VDN VCC Domain transfer Number