5.1.13 Charging support of UE location(s) and TimeZone(s)

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

As specified in TS 24.229 [204], clause 7.2A.4.3, and in RFC 7315 [406], details of the UE location and Timezone are transported in the SIP P-Access-Network-Info header, which is conveyed in SIP signalling through IMS Nodes. Consequently UE location and TimeZone changes are addressed under SIP P-Access-Network-Info header changes.

The SIP P-Access-Network-Info header includes either UE-provided location, either Network-Provided location, both are subject to change independently during an IMS session. Any available UE-provided and Network-Provided locations are received by IMS Nodes in every SIP requests and responses, and transported in two P-Access-Network-Info headers when both are available.The charging support for Network-Provided location is described in clause 5.1.9.

As specified in TS 24.229 [204], clause 7.2.15.3, when a User Agent (UA) supporting one or more cellular radio access technology (e.g. E-UTRAN) is using a non-cellular IP-CAN to access the IM CN subsystem, details of the radio cell identity of the cellular radio access network on which the UE most recently camped are transported in the SIP Cellular-Network-Info header, which is conveyed in SIP signalling through IMS Nodes.

When Charging Data Request [Start/ Interim/Stop] are triggered for SIP session-related procedures, based on principles described in clause 5.2.1, any available SIP P-Access-Network-Info and SIP Cellular-Network-Info header(s) shall be reported to the CDF, using Access Network Information, Additional Access Network Information and Cellular Network Information IEs. The received IEs shall be included by the CDF:

– in Access Network Information, Additional Access Network Information and Cellular Network Information fields of IMS CDRs, upon Charging Data Request [Start] from IMS Nodes.

-_ in the List of Access Network Info Change field of IMS CDRs, upon reception of Charging Data Request [Interim, Stop] from IMS Nodes, only for SIP P-Access-Network-Info and SIP Cellular-Network-Info header(s) identified as changed.

When Debit / Reserve Units Request [Initial/ Update/Terminate] are triggered for SIP session-related procedures, based on principles described in clause 5.3.1, any available SIP P-Access-Network-Info and SIP Cellular-Network-Info header(s) shall be reported, using Access Network Information, Additional Access Network Information and Cellular Network Information IEs.

As specified in clause 5.1.11, during IMS service continuity transfer procedure, the Access Network Information, Additional Access Network Information and Cellular Network Information shall be provided by the AS and ATCF together with transfer parameters, using Access Transfer Information IE, in offline and online charging.