6.4 Data description for IMS converged charging

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

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

6.4.1 Message contents

6.4.1.1 General

The Charging Data Request and Charging Data Response are specified in TS 32.290 [57] and include charging information. The Charging Data Request can be of type [Event, Initial, Update, Termination].

Table 6.4.1.1.1 describes the use of these messages for converged charging.

Table 6.4.1.1.1: Converged charging messages reference table

Message	Source	Destination
Charging Data Request	IMS Node	CHF
Charging Data Response	CHF	IMS Node

6.4.1.2 Structure for the converged charging message formats

6.4.1.2.1 Charging Data Request message

Table 6.4.1.2.1.1 illustrates the basic structure of a Charging Data Request message as used for IMS converged charging.

Table 6.4.1.2.1.1: Charging Data Request message contents

Information Element	Category	Description
Session Identifier	O_C	Described in TS 32.290 [45]
Subscriber Identifier	O_M	Described in TS 32.290 [45]
NF Consumer Identification	M	Described in TS 32.290 [45]
NF Functionality	M	Described in TS 32.290 [45]
NF Name	O_C	Described in TS 32.290 [45]
NF Address	O_C	Described in TS 32.290 [45]
NF PLMN ID	O_C	Described in TS 32.290 [45]
Invocation Timestamp	M	Described in TS 32.290 [45]
Invocation Sequence Number	M	Described in TS 32.290 [45]
Retransmission Indicator	O_C	Described in TS 32.290 [45]
One-time Event	O_C	Described in TS 32.290 [45]
One-time Event Type	O_C	Described in TS 32.290 [45]
Service Specification Information	O_C	Described in TS 32.290 [45]
Supported Features	O_C	Described in TS 32.290 [45]
Notify URI	O_C	Described in TS 32.290 [45]
Triggers	O_C	This field is described in TS 32.290 [45] and holds the IMS specific triggers described in clause 5.4
Multiple Unit Usage	O_C	Described in TS 32.290 [45]
Rating Group	M	Described in TS 32.290 [45]
Requested Unit	O_C	Described in TS 32.290 [45]
Used Unit Container	O_C	Described in TS 32.290 [45]
Triggers	O_C	This field is described in TS 32.290 [45] and holds the IMS specific triggers described in clause 5.4
IMS Charging Information	O_M	This field holds the IMS specific information described in clause 6.4.2.2

Editor’s Note: The full structure of the charging data request is FFS.

6.4.1.2.2 Charging Data Response message

Table 6.4.1.2.2.1 illustrates the basic structure of a Charging Data Response message as used for IMS converged charging.

Table 6.4.1.2.2.1: Charging Data Response Message Contents

Information Element	Category	Description
Session Identifier	O_C	Described in TS 32.290 [45]
Invocation Timestamp	M	Described in TS 32.290 [45]
Invocation Result	O_C	Described in TS 32.290 [45]
Result code	O_C	Described in TS 32.290 [45]
Failed parameter	O_C	Described in TS 32.290 [45]
Failure Handling	O_C	Described in TS 32.290 [45]
Invocation Sequence Number	M	Described in TS 32.290 [45]
Session Failover	O_C	Described in TS 32.290 [45]
Triggers	O_C	Described in TS 32.290 [45]
Multiple Unit information	O_C	Described in TS 32.290 [45]
Result Code	O_C	Described in TS 32.290 [45]
Rating Group	O_M	Described in TS 32.290 [45]
Granted Unit	O_C	Described in TS 32.290 [45]
Validity Time	O_C	Described in TS 32.290 [45]
Announcement Information	O_C	Described in TS 32.281 [41]
Final Unit Indication	O_C	Described in TS 32.290 [45]
IMS Charging Information	O_M	This field holds the IMS specific information described in clause 6.4.2.2.

Editor’s Note: The full structure of the charging data response is FFS.

6.4.1a Ga message contents

Refer to clause 5.4.5 for further information.6.4.1b CDR description on the B_i interface

6.4.1b.1 General

This clause describes the CHF CDR content and format generated of IMS converged charging for IMS nodes (i.e. MRFC, IMS-GWF and SIP AS).

The following tables provide a brief description of each CDR parameter of CHF CDR. The category in the tables is used according to the charging data configuration defined in clause 5.4 of TS 32.240 [1]. Full definitions of the CDR parameters, sorted by the name in alphabetical order, are provided in TS 32.298 [51].

6.4.1b.2 IMS converged charging CHF CDR data

The fields of IMS converged charging CHF CDR are specified in table 6.4.1b.2.1.

Table 6.4.1b.2.1: IMS converged charging CHF record data

Field	Category	Description
Record Type	M	CHF record.
Recording Network Function ID	O_M	This field holds the name of the recording entity, i.e. the CHF id.
Subscriber Identifier	O_M	This field holds the Subscription Permanent Identifier (SUPI) of the served party. This fields should be present except for emergency session. The detail of SUPI is specified in clause 5.9.2 of TS 23.501 [200]
NF Consumer Information	M	This field holds the information of the IMS nodes that used the charging service.
NF Functionality	M	This field contains the function of the node (i.e. MRFC, IMS-GWF and SIP AS)
NF Name	O_C	This field holds the name of the IMS Nodes used.
NF Address	O_C	This fields holds the IP Address of the IMS Nodes used.
NF PLMN ID	O_C	This field holds the PLMN identifier (MCC MNC) of the IMS Nodes.
List of Multiple Unit Usage	O_M	This field holds a list of changes in charging
Rating Group	O_M	This filed holds the rating group.
Used Unit Container	O_C	This field holds the used units and information connected to the reported units.
Service Identifier	O_C	This field holds the Service Identifier.
Triggers	O_C	This field holds the reason for closing the used unit container.
Trigger Timestamp	O_C	This field holds the timestamp of the trigger.
Time	O_C	This field holds the amount of used time.
Service Specific Unit	O_C	This field holds the amount of used service specific units.
Event Time Stamps	O_C	This field holds the timestamps of the event reported in the Service Specific Units, if the reported units are event based.
Rating Indicator	O_C	This field indicates if the units have been rated or not.
Local Sequence Number	M	This field holds the container sequence number.
Record Opening Time	M	Time stamp when the CHF opens the records.
Duration	M	Described in TS 32.298 [57].
Record Sequence Number	C	Described in TS 32.298 [57].
Cause for Record Closing	M	Described in TS 32.298 [57].
Diagnostics	OM	Described in TS 32.298 [57].
Local Record Sequence Number	OM	Described in TS 32.298 [57].
Record Extensions	OC	Described in TS 32.298 [57].
IMS Charging Information	O_M	This field holds the IMS specific information defined in clause 6.4.2.2.

6.4.2 Definition of the IMS converged charging information

6.4.2.1 General

The Charging Information parameter used for IMS converged charging is provided in the following clauses.

6.4.2.2 Definition of IMS charging information

IMS specific charging information used for IMS converged charging is provided within the IMS charging Information.

Table 6.4.2.2.1: Structure of IMS Charging Information

Information Element	Category	Description
Event Type	O_C	This field holds the SIP Method, the content of the SIP "Event" header and the content of the SIP "expires" header when present in the SIP request.
IMS Node Functionality	O_M	This field contains the function of the IMS node.
Role of Node	O_M	This field specifies whether the IMS node is serving the Originating or the Terminating party.
User Information	O_M	Group of user information.
User Identifier	O_C	This field contains the public identification of the user (i.e. GPSI).
User Equipment Info	O_C	This field uniquely identifies the device (fixed or mobile) of the served user, can be based on SIP instance id.
User Location Info	O_C	This field indicates details of where the UE is currently located (access-specific user location information). For MA PDU session, this field holds the user location associated to the 3GPP access
UE Time Zone	O_C	This field holds the Time Zone of where the UE is located, if available where the UE currently resides.
3GPP PS Data Off Status	O_C	This field holds the 3GPP Data off Status when UE’s 3GPP Data Off status is Activated or Deactivated.
ISUP Cause	O_C	This indicates the reason the call was released.
Serving Node Address	O_C	This field holds the IP-address of the Node that generated the access Charging ID.
VLR Number	O_C	This identifies the international E.164 address of the VLR serving the user.
MSC Address	O_C	This identifies the international E.164 address of the MSC that generated the network call reference number.
User Session ID	O_M	This field holds the session identifier. For a SIP session the Session-ID contains the SIP Call ID. When the AS acts as B2BUA, the incoming session is identified.
Outgoing Session ID	O_C	When the AS acts as B2BUA, the outgoing side session is identified by the Outgoing Session ID which contains the SIP Call ID.
Session Priority	O_C	This field contains the priority of the session.
Calling Party Addresses	O_M	This field holds the addresses (SIP URI or Tel URI) URI of the party (Public User Identity or Public Service Identity) initiating a session or requesting a service.
Called Party Address	O_M	For SIP transactions, except for registration, this field holds the address of the party (Public User ID or Public Service ID) to whom the SIP transaction is posted. For registration transactions, this field holds the Public User ID under registration.
Number Portability routing information	O_C	This field includes information on number portability after DNS/ENUM request from IMS node in the calling user’s home network.
Carrier Select routing information	O_C	This field includes information on carrier select after DNS/ENUM request from IMS node in the calling user’s home network.
Alternate Charged Party Address	O_C	The address of an alternate party that is identified by the AS at session initiation, and is charged in place of the calling party.
Requested Party Address	O_C	For SIP transactions this field initially holds the address of the party (Public User ID or Public Service ID) to whom the SIP transaction was originally posted. This field is only present if different from the Called Party Address parameter.
Called Asserted Identities	O_C	The addresses of the final asserted identity. Present if the final asserted identity is available in the SIP 2xx response.
Called Identity Change	O_C	Terminating identity address change and associated time stamp.
Called Identity	O_C	Changed terminating identity information received in a SIP UPDATE or SIP RE-INVITE.
Called Identity Change Time Stamp	O_C	Time stamp of SIP UPDATE or SIP RE-INVITE with changed terminating identity information.
Associated URI	O_C	This field holds a non-barred public user identity (SIP URI or Tel URI) associated to the public user identity under registration and is present for registration transactions.
Time Stamps	O_C	This field holds the time of the SIP Request and the time of the response to the SIP Request.
Application Server Information	O_C	This field holds the SIP URI(s) of the AS(s) addressed during the session and the called party number (SIP URI, E.164), if an AS determines it.
Inter Operator Identifier	O_C	This field holds the identification of the network neighbours (originating and terminating) as exchanged via SIP signalling if available. This field may occur several times.
IMS Charging Identifier	O_M	This field holds the IMS Charging Identifier (ICID) as generated by a IMS node for a SIP session.
Related IMS Charging Identifier	O_C	This field holds the Related IMS charging identifier when the session is the target access leg in case of access transfer.
Related IMS Charging Identifier Generation Node	O_C	This field holds the identifier of the server that generated the Related IMS charging identifier.
Transit IOI List	O_C	This field holds the identification of the involved transit networks as exchanged via SIP signalling if available. This field may occur several times. When received from the AS, each occurrence of this field represents transit networks inbound to or outbound from the S-CSCF.
Early Media Description	O_C	This field holds session and media parameters related to media components set to active during the SIP session establishment and before a final successful or unsuccessful SIP answer to the initial SIP INVITE request is received. Once a media component is set to active, subsequent status changes shall be registered. Since several SDP negotiations may occur during the SIP session establishment, this field may occur several times.
SDP Session Description	O_C	This field holds the content of an "attribute-line" (i=, c=, b=, k=, a=, etc.) related to a session.
SDP Media Component	O_C	This is a grouped field comprising several sub-fields associated with one media component. Since several media components may exist for a session in parallel these sub-fields may occur several times.
Served Party IP Address	O_C	This field holds the IP address of either the calling or called party, depending on whether the P-CSCF is in touch with the calling or the called party.
Server Capabilities	O_C	This field contains the server capabilities as described in 3GPP TS 29.229 [205].
Trunk Group ID	O_C	This field identifies the incoming and outgoing PSTN legs.
Bearer Service	O_C	This field holds the used bearer service for the PSTN leg.
Service Id	O_C	This field identifies the service the MRFC is hosting. For conferences the conference ID is used as the value of this parameter.
Message Bodies	O_C	This field holds information about the Message body, Content-Type, Content-Length, Content-Disposition and Originator if available.
Access Network Information	O_C	This field contains the content of the first P-header P-Access-Network-Info, if available.
Additional Access Network Information	O_C	This field contains the content of an additional SIP P-header "P-Access-Network-Info", if available.
Cellular Network Information	O_C	This field contains the content of one SIP "Cellular-Network-Info" header, when the UE supporting one or more cellular radio access technologies but using a non-cellular IP-CAN, such as untrusted WLAN access, provides this header field to relay information to its service provider about the radio cell identity of the cellular radio access network on which the UE most recently camped.
Access Transfer Information	O_C	This field contains information related to the session transfer.
Access Network Info Change	O_C	This field is a grouped field describing the subsequent SIP P-header "P-Access-Network-Info" changes and associated time stamp.
IMS Communication Service ID	O_C	This field contains the IMS communication service identifier if received in the P-Asserted-Service header in the SIP request for all applicable IMS nodes downstream from the S‑CSCF serving the Originating party. This field contains the IMS communication service identifier if received in the "+g.3gpp.icsi-ref" header field parameter of the Feature-Caps header in the SIP response for all applicable IMS nodes upstream from the S‑CSCF serving the Originating party.
IMS Application Reference ID	O_C	This field contains the IMS application reference identifier if received in the SIP Request.
Cause Code	O_C	This field contains the cause value.
Reason Header	O_C	This field contains SIP reason header included in BYE or CANCEL method, Reliability of this information is not guaranteed if the SIP or CANCEL is originated outside of the trust domain which is determined by the Operator on a "per parameter basis". Since several Reason Header may exist for a SIP message, these sub-fields may occur several times
Initial IMS Charging Identifier	O_C	This field holds the Initial IMS charging identifier (ICID) as generated by the IMS node for the initial SIP session created for IMS service continuity.
NNI Information	O_C	This field holds information about the NNI used for interconnection and roaming.
From Address	O_M	Contains the information from the SIP From header.
IMS Emergency Indication	O_C	This field indicates the registration is an emergency registration or the IMS session is an IMS emergency session
IMS Visited Network Identifier	O_C	Contains the information from the SIP P-Visited-Network-ID header.
SIP Route header received	O_C	Contains the information in the topmost route header in a received initial SIP INVITE or non-session related SIP MESSAGE request.
SIP Route header transmitted	O_C	Contains the information in the route header representing the destination in a transmitted initial SIP INVITE or non-session related SIP MESSAGE request.
TAD Identifier	O_C	This field indicates the type of access network (CS or PS) through which the session shall be terminated.
FE Identifier List	O_C	This element contains one or more IM CN subsystem functional entity addresses and/or AS and application identifiers where the IM CN subsystem functional entity does create charging information for the related CDR of this IM CN subsystem functional entity.

6.4.2.3 Detailed message format for converged charging

The following clause specifies per Operation Type the charging data that are sent by IMS node for IMS converged charging.

The Operation Types are listed in the following order: I (Initial)/U (Update)/T (Termination)/E (Event). Therefore, when all Operation Types are possible it is marked as IUTE. If only some Operation Types are allowed for a node, only the appropriate letters are used (i.e. IUT or E) as indicated in the table heading. The omission of an Operation Type for a particular field is marked with "-" (i.e. I-TE). Also, when an entire field is not allowed in a node the entire cell is marked as "-".

Table 6.5.3.1 defines the basic structure of the supported fields in the Charging Data Request message for IMS converged charging.

Table 6.4.2.3.1: Supported fields in Charging Data Request message

Information Element	Node Type	IMS Node
Information Element	Supported Operation Types	IUTE
Session Identifier		-UTE
Subscriber Identifier		IUTE
NF Consumer Identification		IUTE
Invocation Timestamp		IUTE
Invocation Sequence Number		IUTE
Retransmission Indicator		IUT-
Notify URI		IU–
Supported Features		IU-E
Service Specification Information		IUTE
Triggers		-UT-
Multiple Unit Usage		IUT E
Rating Group		IUT E
Requested Unit		IU–
Used Unit Container		-UT E
Triggers		-UT E
IMS Charging Information		IUTE
Event Type		IUTE
IMS Node Functionality		IUTE
Role of Node		IUTE
User Information		IUTE
User Identifier		IUTE
User Equipment Info		IUTE
User Location Info		IUTE
UE Time Zone		IUTE
3GPP PS Data Off Status		—E
ISUP Cause		–TE
Serving Node Address		IU–
VLR Number		I–E
MSC Address		I–E
User Session ID		IUTE
Outgoing Session ID		IUTE
Session Priority		I–E
Calling Party Address		IUTE
Called Party Address		IUTE
Number Portability routing information		I–E
Carrier Select routing information		I–E
Alternate Charged Party Address		IUTE
Requested Party Address		I–E
Called Asserted Identity		-U-E
Called Identity Change		-U–
Called Identity		-U–
Called Identity Change Time Stamp		-U–
Associated URI		—E
Time Stamps		IUTE
Application Server Information		IUTE
Inter Operator Identifier		IUTE
IMS Charging Identifier		IUTE
Related IMS Charging Identifier		IUTE
Related IMS Charging Identifier Generation Node		IUTE
Transit IOI List		IUTE
Early Media Description		I–E
SDP Session Description		IU–
SDP Media Component		IU–
Served Party IP Address		IUTE
Server Capabilities		IUTE
Trunk Group ID		IUTE
Bearer Service		IUTE
Service Id		IUT-
Message Bodies		IUTE
Access Network Information		IUTE
Additional Access Network Information		IUTE
Cellular Network Information		IUTE
Access Transfer Information		IU–
Access Network Info Change		-U–
IMS Communication Service ID		-U–
IMS Application Reference ID		I–E
Cause Code		–TE
Reason Header		–TE
Initial IMS Charging Identifier		IUTE
NNI Information		I-TE
From Address		IUTE
IMS Emergency Indication		IUTE
IMS Visited Network Identifier		IUTE
SIP Route header received		I–E
SIP Route header transm-tted		I–E
TAD Identifier		IU–
FE Identifier List		IUTE

Table 6.4.2.3.1 defines the basic structure of the supported fields in the Charging Data Response message for IMS converged charging.

Table 6.4.2.3.2: Supported fields in Charging Data Response message

Information Element	Node Type	IMS Node
Information Element	Supported Operation Types	IUTE
Session Identifier		IUTE
Invocation Timestamp		IUTE
Invocation Result		IUTE
Invocation Sequence Number		IUTE
Session Failover		I—
Triggers		–
Multiple Unit information		I–E
Result Code		IU-E
Rating Group		IU–
Granted Unit		IU–
Validity Time		IU–
Final Unit Indication		IU–

6.4.2.4 Formal IMS converged charging parameter description

6.4.2.4.1 IMS charging CHF CDR parameters

The detailed definitions, abstract syntax and encoding of the IMS charging CHF CDR parameters are specified in TS 32.298 [51].

6.4.2.2.2 IMS charging resources attributes

The detailed definitions of resources attributes used for IMS charging are specified in TS 32.291 [58].

Annex A (informative):
Bibliography

This Annex is a placeholder for documents which are not explicitly cited in this specification.

Annex B (informative):
Message flows for service termination by OCS