6 Definition of charging information

32.2523GPPCharging managementRelease 9Telecommunication managementTSWireless Local Area Network (WLAN) charging

6.1 Data description for WLAN offline charging

6.1.1 Rf message contents

The WLAN nodes generate accounting information that can be transferred from the CTF to the CDF. For this purpose, WLAN offline charging utilises the Charging Data Transfer operation that is specified in the 3GPP accounting application in 3GPP TS 32.299 [50].

6.1.1.1 WLAN Direct IP Access Charging message contents

The accounting message contents at Wa and Wd reference points are specified in 3GPP TS 29.234 [204].

The accounting information exchanged on the interface (Wf reference point) shall be the same as specified in 3GPP TS 32.299 [50] (reference point Rf). The Wf reference point shall transport the accounting Information Elements arriving over the Wa/Wd reference point. If the Wa/Wd reference point is RADIUS based, the RADIUS accounting messages and Information Elements shall be translated to Diameter accounting messages AVPs as defined in RFC 3588 [401] and in RFC 4005 [404]. If Wa/Wd reference point is Diameter incoming messages shall be passed on.

Editor’s Note: When Wf interface is based on the Rf interface, it is FFS if there is a need for Diameter – Diameter translation. Alternatively, Wf could be based on Wa/Wd.

The Charging Data Transfer operation employs the Charging Data Request and Charging Data Response messages. Table 6.1.1.1 describes the use of these messages in WLAN direct IP access offline charging.

Table 6.1.1.1: Offline Charging Messages Reference Table

Message

Source

Destination

Charging Data Request

WLAN AN

CDF

Charging Data Response

CDF

WLAN AN

6.1.1.1.1 Charging Data Request Message

Table 6.1.1.1.1 illustrates the basic structure of the Charging Data Request message as used for WLAN direct IP access offline charging.

Table 6.1.1.1.1: Charging Data Request Message Contents

Field

Category

Description

Session Identifier

M

This field identifies the operation session.

Originator Node-Id

M

This field contains the identification of the source point of the operation and the realm of the operation originator.

Originator Domain

M

This field contains the realm of the operation originator.

Operation Type

M

This field defines the transfer type: event for event based charging and start, interim, stop for session based charging.

Operation Number

M

This field contains the sequence number of the transferred messages.

Operation Token

OM

This field identifies the domain, subsystem or service and release.

Service Information

OM

This field holds the 3GPP specific WLAN parameter.

6.1.1.1.2 Charging Data Response Message

Table 6.1.1.1.2 illustrates the basic structure of a Charging Data Response message as used for WLAN direct IP access offline charging.

Table 6.1.1.1.2: Charging Data Response Message

Field

Category

Description

Session Identifier

M

This field identifies the operation session.

Result

6.1.2 GTP’ message contents

GTP’ is used between CDF and CGF on Wz reference point.

Editor’s note: more description needed

6.1.3 CDR Description on the Bw Interface

Dedicated types of CDRs can be generated in the service domain for WLAN by the WLAN AN/PDG/AAA Servers. The content of each CDR type is defined in one of the tables that are part of this clause. For each CDR type the parameter definition includes the parameter name, description and category.

6.1.3.1 CDR Field Types

The following Standard CDR content and format are considered:

– WLAN-AN-CDR generated based on information from the WLAN AN handled by 3GPP AAA Server.

– WLAN-PDG-CDR generated based on information from the PDG.

The content of each CDR type is defined in the tables 6.1.3.2.1 and 6.1.3.2.2. For each CDR type the field definition includes the field name, category and description. The CDF provides the CDRs at the Bw interface in the format and encoding described in 3GPP TS 32.298 [51]. Additional CDR formats and contents may be available at the interface to the billing system to meet the requirements of the billing system, these are outside of the scope of 3GPP standardisation.

6.1.3.2 CDR Content

Editor’s Note: Contents of the CDRs are for further study.

6.1.3.2.1 WLAN Direct IP Access CDR (WLAN-AN-CDR)

NOTE: This CDR should contain a WLAN-Radio-Container as defined in "WLAN Information".

Table 6.1.3.2.1 WLAN Direct IP Access CDR (WLAN-AN-CDR)

Field

Category

Description

Record Type

M

WLAN Direct IP Access CDR

Record Sequence Number

C

Partial record sequence number. Only present in case of partial records

Served IMSI

M

IMSI of the served party

Served IMEI

C

The IMEI of the ME, if available

Operator Name

M

Hot Spot Operator Name as defined in IETF RFC 5580 [405]

Location Information

C

Location information regarding the hotspot operator as defined in IETF RFC 5580 [405]

Location Data

C

Location data regarding the hotspot operator as defined in IETF RFC 5580 [405]

Charging ID

M

Accounting Session-ID from WLAN AN

NAS Port

C

NAS Port of WLAN AN

NAS Port-Id

C

NAS Port-Id of WLAN AN

NAS Port Type

C

NAS-Port-Type of WLAN AN

NAS-IP address

C

IPv4 address of the hot-spot

NAS-Ipv6 address

C

IPv6 address of the hot-spot

Local IP Address

OC

Local IP address of the served IMSI, i.e. IPv4 or IPv6

Data Volume Downlink

C

Downlink data volume for WLAN UE

Data Volume Uplink

C

Uplink data volume for WLAN UE

Record Opening Time

M

Time stamp when WLAN session is activated or record opening time on subsequent partial records

Local Record Sequence Number

OM

Consecutive record number created by this node. The number is allocated sequentially including all CDR types

Duration

M

Duration of this record

Cause for Record Closing

M

The reason for closure of the record

Node ID

OM

Name of the recording entity

Service Context Id

OM

Holds the context information to which the CDR belongs. The information is obtained from the Operation Token of the Charging Data Request message

Record Extensions

OC

A set of network operator/manufacturer specific extensions to the record
Conditioned upon the existence of an extension

6.1.3.2.2 WLAN 3GPP IP Access charging message contents

The content of WLAN 3GPP IP Access CDR is defined in the table 6.1.3.2.2. The field definition includes the field name, category and description. The detailed field descriptions are provided in 3GPP TS 32.298 [51].

If the collection of CDR data is enabled then the PDG shall make available the following data available for each WLAN 3GPP IP Access connection.

Table 6.1.3.2.2 : Wz interface CDR content (WLAN-CDR)

Field

Category

Description

Record Type

M

WLAN PDG record.

Served IMSI

M

IMSI of the served party.

Served MSISDN

OM

The primary MSISDN of the subscriber.

PDG Address used

M

IP address of the PDG used.

Node ID

OM

Name of the recording entity.

Serving WAG Address

M

Serving WAG address used during this record.

WAG PLMN Identifier

OM

WAG PLMN Identifier (MCC and MNC) used during this record.

Serving AAA Server/proxy Address

M

Serving AAA Server/Proxy address.

WLAN UE remote IP address

OC

WLAN UE Local IP address

OC

Charging ID

M

PDG charging identifier used to correlate WLAN AN generated information to PDG generated information

WLAN session id

M

WLAN session identifier used to correlate WLAN AN generated information to PDG generated information

Access Point Name Network Identifier

OM

The logical name of the connected access point to the external packet data network (network identifier part of APN).

Charging Characteristics?

M

The Charging Characteristics applied to the PDP context.?

Charging Characteristics Selection Mode?

OM

Holds information about how Charging Characteristics were selected.

Record Opening Time

M

Time stamp when End-to-end Tunnel is activated in this PDG? or record opening time on subsequent partial records.

Duration

M

Duration of this record in the PDG.

Cause for Record Closing

M

The reason for the release of record from this PDG.

Record Sequence Number

C

Partial record sequence number, only present in case of partial records.

Local Record Sequence Number

OM

Consecutive record number created by this node. The number is allocated sequentially including all CDR types.

Diagnostics

OM

A more detailed reason for the release of the connection.

Record Extensions

OC

A set of network operator/manufacturer specific extensions to the record. Conditioned upon the existence of an extension.

6.2 Data description for WLAN online charging

Editor’s Note: To be completed

6.2.1 Ro message contents

6.2.1.1 WLAN Direct IP Access Charging message contents

The WLAN nodes generate debit/reserve unit information that can be transferred from the CTF to the OCF. For this purpose, WLAN online charging utilises the Debit Unit and Reserve Unit procedure that is specified in the 3GPP credit control application in 3GPP TS 32.299 [50].

The Debit/Reserve Unit procedure employs the Debit/Reserve Unit Request and Debit/Reserve Unit Response messages. Table 6.2.1.1 describes the use of these messages in WLAN Direct IP Access online charging.

Table 6.2.1.1: Online Charging Messages Reference Table

Command-Name

Source

Destination

Debit/Reserve Unit Request

3GPP AAA Server

OCS

Debit/Reserve Unit Response

OCS

3GPP AAA Server

6.2.1.1.1 Debit/Reserve Unit Request message

Table 6.2.1.1.1 illustrates the basic structure of the Debit/Reserve Unit Request message as used for WLAN direct IP access online charging.

Table 6.2.1.1.1: Debit/Reserve Units Request Content

Debit/Reserve Units Request

Category

Description

Session Identifier

M

This field identifies the operation session.

Originator Node-Id

M

This field contains the identification of the source point of the operation.

Originator Domain

M

This field contains the realm of the operation originator.

Operation Token

M

This field is an unique operation identifier.

Operation Type

M

This field defines the transfer type: event for event based charging and start, interim, stop for session based charging.

Operation Number

M

This field contains the sequence number of the transferred messages.

Subscriber Address

OC

This field contains the identification of the mobile subscriber (i.e. MSISDN) that uses the requested service.

Service Token

OC

This field is a unique service identifier.

Cause of Termination

OC

This field contains the termination reason of the service.

Service Units Requested

OC

This field contains the amount of requested service units.

Service Units Used

OC

This field contains the amount of used service units.

Multiple Operation

OC

This field indicate the occurrence of multiple operations.

Multiple Unit Operation

OC

This field contains the parameter for the quota management.

Subscriber Equipment Number

OC

This field contains the identification of the mobile device (i.e. IMEI) that uses the subscriber.

Service Information

OM

This field holts additional 3GPP service specific parameter:

– PS Information;

– WLAN Information;

– IMS Information;

– LCS Information;

– PoC Information;

– MBMS Information.

6.2.1.1.2 Debit/Reserve Unit Response message

Table 6.2.1.1.2 illustrates the basic structure of the Debit/Reserve Unit Response message as used for WLAN direct IP access online charging.

Table 6.2.1.1.2: Debit/Reserve Units Response Content

Debit/ Reserve Units Response

Category

Description

Session Identifier

M

This field identifies the operation session.

Operation Result

M

This field identifies the result of the operation.

Originator Node-Id

M

This field contains the identification of the source point of the operation.

Originator Domain

M

This field contains the realm of the operation originator.

Operation Type

M

This field defines the transfer type: event for event based charging and start, interim, stop for session based charging.

Operation Number

M

This field contains the sequence number of the transferred messages.

Service Units Granted

OC

This filed contains the amount of used service units.

Unit Validity Time

OC

This field contains the time for the validity of the granted service units.

Extended Information

OC

This field holds the 3GPP specific information.

6.2.1.2 WLAN 3GPP IP Access Charging message contents

The Debit/Reserve Unit procedure employs the Debit/Reserve Unit Request and Debit/Reserve Unit Response messages. Table 6.2.1.2 describes the use of these messages in WLAN 3GPP IP Access online charging.

Table 6.2.1.2 Online Charging Messages Reference Table

Command-Name

Source

Destination

Debit/Reserve Unit Request

PDG/3GPP AAA Server

OCS

Debit/Reserve Unit Response

OCS

PDG/3GPP AAA Server

6.2.1.2.1 Debit/Reserve Unit Request message

Table 6.2.1.2.1 illustrates the basic structure of the Debit/Reserve Unit Request message as used for WLAN 3GPP IP access online charging.

Table 6.2.1.2.1 Debit/Reserve Units Request Content

Debit/Reserve Units Request

Category

Description

Session Identifier

M

This field identifies the operation session.

Originator Node-Id

M

This field contains the identification of the source point of the operation.

Originator Domain

M

This field contains the realm of the operation originator.

Operation Token

M

This field is an unique operation identifier.

Operation Type

M

This field defines the transfer type: event for event based charging and start, interim, stop for session based charging.

Operation Number

M

This field contains the sequence number of the transferred messages.

Subscriber Address

OC

This field contains the identification of the mobile subscriber (i.e. MSISDN) that uses the requested service.

Service Token

OC

This field is a unique service identifier.

Cause of Termination

OC

This field contains the termination reason of the service.

Service Units Requested

OC

This field contains the amount of requested service units.

Service Units Used

OC

This field contains the amount of used service units.

Multiple Operation

OC

This field indicate the occurrence of multiple operations.

Multiple Unit Operation

OC

This field contains the parameter for the quota management.

Subscriber Equipment Number

OC

This field contains the identification of the mobile device (i.e. IMEI) that uses the subscriber.

Service Information

OM

This field holts additional 3GPP service specific parameter:

– PS Information;

– WLAN Information;

– IMS Information;

– LCS Information;

– PoC Information;

– MBMS Information.

6.2.1.2.2 Debit/Reserve Unit Response message

Table 6.2.1.2.2 illustrates the basic structure of the Debit/Reserve Unit Response message as used for WLAN 3GPP IP access online charging.

Table 6.2.1.2.2 Debit/Reserve Units Response Content

Debit/ Reserve Units Response

Category

Description

Session Identifier

M

This field identifies the operation session.

Operation Result

M

This field identifies the result of the operation.

Originator Node-Id

M

This field contains the identification of the source point of the operation.

Originator Domain

M

This field contains the realm of the operation originator.

Operation Type

M

This field defines the transfer type: event for event based charging and start, interim, stop for session based charging.

Operation Number

M

This field contains the sequence number of the transferred messages.

Service Units Granted

OC

This filed contains the amount of used service units.

Unit Validity Time

OC

This field contains the time for the validity of the granted service units.

Extended Information

OC

This field holds the 3GPP specific information.

6.2.2 Detailed Message Formats

FFS.

6.2.2.1 WLAN Direct IP Access Charging message contents

FFS.

6.2.2.2 WLAN 3GPP IP Access Charging message contents

FFS.

6.3 WLAN Charging specific parameters

The WLAN-Information parameter used for WLAN online charging is provided in the Service-Information parameter.

6.3.1.1 WLAN charging information assignment for Service-Information

The components in the Service-Information that are use for WLAN charging can be found in table 6.3.1.1.

Table 6.3.1.1: Service-Information used for WLAN Charging

Field

Category

Description

Service-Information

OM

This is a structured field and holds the 3GPP specific parameter as defined in 3GPP TS 32.299 [50].
For WLAN Charging the WLAN-Information is used.

WLAN-Information

OM

This is a structured field and holds the WLAN specific parameters.
The details are defined in clause 6.3.1.2.

6.3.1.2 Definition of WLAN Information

WLAN specific charging information is provided within the WLAN-Information. The fields of the WLAN-Information which are different coved in several WLAN network notes are indicated by the note specific type.

The detailed structure of the WLAN-Information parameter can be found in table 6.3.1.2.

Table 6.3.1.2 Structure of the WLAN-Information

Field

Category

Description

PDG-Charging-Id

OC

TBD

WLAN-Session-Id

OC

TBD

PDG-Address

OC

TBD

PDG-IPv6-Address

OC

TBD

WAG-Address

OC

TBD

WAG-IPv6-Address

OC

TBD

WAG-PLMN-Id

OC

TBD

AAA-Server/Proxy-Address

OC

TBD

AAA-Server/Proxy-Ipv6-Address

OC

TBD

Framed-IP-Address

OC

TBD

Framed-IPv6-Prefix

OC

TBD

WLAN-UE-Local-IP-Address

OC

TBD

WLAN-UE-Local-Ipv6-Address

OC

TBD

3GPP-CG-Address

OC

TBD

3GPP-CG-IPv6-Address

OC

TBD

Called-Station-Id (See note)

OC

TBD

3GPP-Session-Stop-Indicator

OC

TBD

3GPP-Charging-Characteristics

OC

TBD

Charging-Rule-Base-Name

OC

TBD

WLAN-Radio-Container

OC

TBD

Operator-Name

OC

TBD

Location-Data

OC

TBD

Location-Information

OC

TBD

WLAN-Technology

OC

TBD

NOTE: This field contains the identifier of the access point (APN) the user is connected to

6.3.2 Formal WLAN charging parameter description

6.3.2.1 WLAN charging information for CDRs

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

6.3.2.2 Definition of the WLAN charging events

The detailed event parameter definitions are specified in TS 32.299 [50].

Annex A (informative):
Bibliography

a) The 3GPP charging specifications

– 3GPP TS 32.250: "Telecommunication management; Charging management; Circuit Switched (CS) domain charging".

– 3GPP TS 32.251: "Telecommunication management; Charging management; Packet Switched (PS) domain charging".

– 3GPP TS 32.260: "Telecommunication management; Charging management; IP Multimedia Subsystem (IMS) charging".

– 3GPP TS 32.270: "Telecommunication management; Charging management; Multimedia Messaging Service (MMS) charging".

– 3GPP TS 32.271: "Telecommunication management; Charging management; Location Services (LCS) charging".

– 3GPP TS 32.296: "Telecommunication management; Charging management; Online Charging System (OCS): Applications and interfaces".

b) Other charging specifications

– ITU-T Recommendation D.93: "Charging and accounting in the international land mobile telephone service (provided via cellular radio systems)".

c) Common 3GPP specifications

– 3GPP TS 22.101: "Service aspects; Service principles".

– 3GPP TS 22.115: "Service aspects; Charging and billing".

– 3GPP TS 23.002: "Network architecture".

– 3GPP TS 23.003: "Numbering, addressing and identification".

– 3GPP TS 27.001: "General on Terminal Adaptation Functions (TAF) for Mobile Stations (MS)".

d) other Domain and Service specific 3GPP / ETSI specifications

– 3GPP TR 23.934: "3GPP system to Wireless Local Area Network (WLAN) interworking; Functional and architectural definition".

– 3GPP TS 24.234: "3GPP System to Wireless Local Area Network (WLAN) interworking; User Equipment (UE) to network protocols; Stage 3".

e) Relevant ITU Recommendations

– ITU-T Recommendation D.93: "Charging and accounting in the international land mobile telephone service (provided via cellular radio systems)".

– ITU-T Recommendation E.164: "The international public telecommunication numbering plan".

– ITU-T Recommendation Q.767: "Application of the ISDN user part of CCITT signalling System No.7 for international ISDN interconnections".

– ITU-T Recommendation X.25: "Interface between Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE) for terminals operating in the packet mode and connected to public data networks by dedicated circuit".

– ITU-T Recommendation X.121: "International numbering plan for public data networks".

f) Relevant IETF RFCs

– IETF RFC 959 (1985): "File Transfer Protocol".

– IETF RFC 783 (1981): "Trivial File Transfer Protocol (TFTP)".

Annex B (informative):
Change history

Change history

Date

TSG #

TSG Doc.

CR

Rev

Subject/Comment

Cat

Old

New

Jun 2006

SA_32

SP-060246

0001

Correction to I-WLAN Charging Identities

F

6.0.0

6.1.0

Sep 2006

SA_33

SP-060521

0002

Correction to Served PDP Address in WLAN-AN-CDR

F

6.1.0

6.2.0

Dec 2006

SA_34

SP-060716

0003

Add an identifier for the service initiating offline Diameter Accounting

B

6.2.0

7.0.0

Jun 2008

SA_40

SP-080330

0004

1

WLAN online charging

F

7.0.0

8.0.0

Sep 2009

SA_45

SP-090537

0005

Add I-WLAN related reference and some definitions

B

8.0.0

9.0.0

Sep 2011

SA_53

SP-110528

0008

1

Correction to Charging ID in WLAN-CDR content

A

9.0.0

9.1.0

Mar 2015

SA_67

SP-150070

0013

Correction on IETF references

A

9.1.0

9.2.0