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Content for  TS 29.658  Word version:  17.0.0

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1  Scopep. 7

The present document specifies the Stage 3 of the real-time transfer of Tariff Information between a Charge Determination Point (CDP) and a Charge Generation Point (CGP) by means of the Session Initiation Protocol (SIP).
It identifies the protocol procedures and switching functions needed to support the transfer of tariff information related to IP multimedia services. The information needed to support the ISDN User part (ISUP) signalling aspects of charging (ES 201 296 [6]) for Advice of Charge information purposes is also specified, however, it can be used for other purposes as well where applicable.
The present document is applicable to an environment where different operators are working together. It is also applicable to a single network operator environment.
Whether the present document is applicable to a national environment and/or can be used for inter-network purposes depends on regulatory demands and/or bilateral agreements. It should be noted that there are network requirements and signalling limitations that are not covered because they are outside the scope of the present document. Examples of these are as follows:
  • the on-line provided advice of charge information may not accurately reflect the correct charging rate due to discount rates, special charging arrangements, etc. It is out of scope to ensure alignment of this information;
  • complaint handling between network operators in case of incorrect advice of charge information;
  • explicit encryption or special security mechanisms;
  • usage of the transferred tariff information for charging purposes;
  • interaction between UE and CGP for possible confirmation of provided tariffs;
  • any function behind the CGP towards the UE.

2  Referencesp. 7

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
  • References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
  • For a specific reference, subsequent revisions do not apply.
  • For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
The following referenced documents are indispensable for the application of the present document. For dated references, only the edition cited applies. For non-specific references, the latest edition of the referenced document (including any amendments) applies.
TS 22.173: "IP Multimedia Core Network Subsystem (IMS) Multimedia Telephony Service and supplementary services; Stage 1".
RFC 2976:  "The SIP INFO Method".
RFC 4006:  "Diameter Credit-Control Application".
TS 24.229: "Internet Protocol (IP) multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3".
ISO 4217: "International Organization for Standardization; Type Currency Code List".
ETSI ES 201 296 (V1.3.1): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP); Signalling aspects of charging".
ETSI TS 183 058 V2.0.0: "Telecommunications and Internet Converged Services and Protocols for Advanced Networking (TISPAN); SIP Transfer of IP Multimedia Service Tariff Information; Protocol specification".
RFC 3261  (June 2002): "SIP: Session Initiation Protocol".
RFC 3023  (January 2001): "XML Media Types".
RFC 4288  (December 2005): "Media Type Specifications and Registration Procedures".

3  Definitions and abbreviationsp. 8

3.1  Definitionsp. 8

For the purposes of the present document, the terms and definitions given in TS 22.173 and the following apply:
absolute time:
time of the day representing GMT
add-on charge:
single additional charge which does not change the current tariff
number of charge units (for the usage of a chargeable event (telecommunication service))
Charge Determination Point (CDP):
determines which tariff/add-on charge should be applied, and inserts the tariff/add-on charge information to the appropriate SIP requests or responses
Charge Generation Point (CGP):
receives the tariff/add-on charge information that was added by a CDP and transferred in the appropriate SIP requests or responses
charge unit:
base element for the charging process, expressed in non-monetary or monetary units
function within the telecommunications network and the associated OCS/BD components whereby information related to a chargeable event is collected, formatted, transferred and evaluated in order to make it possible to determine usage for which the charged party may be billed (offline charging) or the subscriber's account balance may be debited (online charging).
time, typically in number of seconds, to perform the on-line mechanism used for fraud control and cost control
within a tariff sequence, a charge unit per time unit
set of parameters defining the network utilization charges for the use of a particular bearer / session / service
tariff determination instance:
particular charging-related process with a corresponding communication between a charge determination point and a charge registration/charge generation point
tariff sequence:
list of consecutive subtariffs which has to be applied for the charging of the communication event

3.2  Abbreviationsp. 9

For the purposes of the present document, the following abbreviations apply:
Advice Of Charge
Add-On ChaRGe information
Application Service Element
Charge Determination Point
Charge Generation Point
ChaRGe Tariff information
Greenwich Mean Time
IP Multimedia Subsystem
Internet Protocol
Integrated Service Data Network
ISDN User Part
Next Generation Network
Public Switch Telephone Network
Session Initiation Protocol
User Equipment

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