ETSI ES 201 296 V1.3.1 (2003-04)

SLOVENSKI STANDARD
SIST ES 201 296 V1.3.1:2005
01-januar-2005
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Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User
Part (ISUP); Signalling aspects of charging
Ta slovenski standard je istoveten z: ES 201 296 Version 1.3.1
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
SIST ES 201 296 V1.3.1:2005 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ES 201 296 V1.3.1:2005

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SIST ES 201 296 V1.3.1:2005

ETSI ES 201 296 V1.3.1 (2003-04)
ETSI Standard


Integrated Services Digital Network (ISDN);
Signalling System No.7 (SS7);
ISDN User Part (ISUP);
Signalling aspects of charging

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SIST ES 201 296 V1.3.1:2005
 2 ETSI ES 201 296 V1.3.1 (2003-04)



Reference
RES/SPAN-130315
Keywords
ISDN, SS7, ISUP, charging
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SIST ES 201 296 V1.3.1:2005
 3 ETSI ES 201 296 V1.3.1 (2003-04)
Contents
Intellectual Property Rights.5
Foreword.5
1 Scope.6
2 References.7
3 Definitions and abbreviations.7
3.1 Definitions.7
3.2 Abbreviations.8
4 Specification structure.9
5 Description.10
5.1 General description.10
5.2 Network provider option .11
6 Application Process functions.11
6.1 Procedures at a Charge Determination Point.11
6.1.1 Procedures during call set-up.12
6.1.1.1 CRGT request primitive.12
6.1.1.2 Call attempt charge .12
6.1.1.3 Call set-up charge.12
6.1.1.4 Communication charge.13
6.1.2 Procedures after start of charging .13
6.1.2.1 Change current tariff .13
6.1.2.2 Provide or change the next tariff and the tariff switch-over time.14
6.1.2.3 Delete the previously issued next tariff and tariff switch-over time .14
6.1.2.4 Add-on charging information.14
6.1.3 Subsequent CRGT request primitives.14
6.1.4 Acknowledgement and timer Tcrga.14
6.1.5 Advice of charge/subscriber charging.15
6.1.6 Application Transport Instruction Indicators.15
6.1.7 Exceptional procedures.15
6.2 Procedures at the Connection Control Point.15
6.2.1 Procedures during call Set-up .16
6.2.1.1 CRGT indication primitive .16
6.2.2 Procedure at start of charge.16
6.2.3 Procedure after start of charge .16
6.2.3.1 Add-on charging information.16
6.2.3.2 CRGT indication primitive .16
6.2.4 Procedure at stop of charge.16
6.2.5 Acknowledgement and timer Tcrga.17
6.2.6 Application Transport Instruction Indicators.17
6.2.7 Exceptional procedures.17
6.3 Procedures at the charge registration or charge generation point .18
6.3.1 Procedures during call set-up.18
6.3.1.1 CRGT indication primitive .18
6.3.1.2 Call attempt charge .19
6.3.1.3 Call setup charge.19
6.3.1.4 Communication charge.19
6.3.2 Procedures after start of charge.20
6.3.2.1 Change current tariff .20
6.3.2.2 Provide or change the next tariff and the tariff switch-over time.22
6.3.2.3 Delete the previously received next tariff and tariff switch-over time.22
6.3.2.4 Add-on charging information.22
6.3.3 Subsequent CRGT indication primitives .22
6.3.4 Procedure at start of charge.23
6.3.5 STOP indication primitive .23
ETSI

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 4 ETSI ES 201 296 V1.3.1 (2003-04)
6.3.6 Acknowledgement.23
6.3.7 Advice of charge/subscriber charging.23
6.3.8 Activation of next tariff at start of charge.23
6.3.9 Exceptional procedures.24
6.3.10 Error indication primitive .25
6.4 Handling of identifiers.25
6.4.1 CRGT and AOCRG primitives.25
6.4.1.1 Identifiers in CRGT and AOCRG primitives.25
6.4.1.2 Assignment and use of identifiers .25
6.4.2 START and STOP primitives .26
6.4.2.1 Identifiers in START and STOP primitives .26
6.4.2.2 Assignment and use of identifiers .26
6.5 Primitive interface.26
6.6 ISUP basic call compatibility instruction indicators .27
7 Single association control function .27
7.1 Introduction.27
7.2 Outgoing messages.27
7.3 Incoming messages.28
8 Charging ASE.28
8.1 Introduction.28
8.2 Primitive interface.28
8.3 Signalling procedures.28
8.3.1 Outgoing direction.28
8.3.2 Incoming direction.29
8.3.3 Primitive contents.29
9 Formats and codes of application data .29
10 Timers.36
Annex A (informative): Signalling interworking with DSS1.37
Annex B (informative): Examples.38
B.1 Introduction.38
B.2 Examples.39
Annex C (informative): Specification Structure.46
History .47

ETSI

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SIST ES 201 296 V1.3.1:2005
 5 ETSI ES 201 296 V1.3.1 (2003-04)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
All published ETSI deliverables shall include information which directs the reader to the above source of information.
Foreword
This ETSI Standard (ES) has been produced by ETSI Technical Committee Services and Protocols for Advanced
Networks (SPAN).
ETSI

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SIST ES 201 296 V1.3.1:2005
 6 ETSI ES 201 296 V1.3.1 (2003-04)
1 Scope
The present document specifies the stage three of the transfer of charging related information between a charge
determination point and a charge registration or charge generation point by means of the Signalling System No.7
protocol. Additionally a connection control point may be located between determination point and a charge registration
or charge generation point. Stage three identifies the protocol procedures and switching functions needed to support a
feature.
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:
- which currency is used;
- capabilities that require a translation function of currencies or for the translation of currencies into metering
pulses;
- with an analogue access with pulse metering, no distinction can be made between pulses resulting from
charges imposed by different operators;
- the on-line provided advice of charge information may not accurately reflect the correct charging rate due to
discount rates, special charging arrangements, etc.;
- in association with these charging procedures, changes of the ISDN AoC supplementary services may be
required for the identification of the network operator;
- new services like B-ISDN and new IN call concepts are not fully considered in the present document;
especially the relay of charging information within configurations with more than one 'B' subscriber at the
same time
(e.g. conference calls) is not supported;
- no interworking is covered with existing implementations making use of implicit information elements
pointing to locally available charging data;
- complaint handling between network operators in case of incorrect advice of charge information;
- explicit encryption or special security mechanisms.
This application makes use of the Application Transport Mechanism (APM) described in [2]. The present document
specifies the respective user, i.e. the APM-user, to support the transfer of charging related information.
ETSI

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SIST ES 201 296 V1.3.1:2005
 7 ETSI ES 201 296 V1.3.1 (2003-04)
2 References
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 and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
[1] ETSI EN 300 356-1 (V3.2.2): "Integrated Services Digital Network (ISDN); Signalling System
No.7; ISDN User Part (ISUP) version 3 for the international interface; Part 1: Basic services
[ITU-T Recommendations Q.761 to Q.764 (1997), modified]".
[2] ETSI EN 301 069-1: "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7);
ISDN User Part (ISUP); Application transport mechanism; Part 1: Protocol specification
[ITU-T Recommendation Q.765, modified]".
[3] ITU-T Recommendation X.680: "Information technology - Abstract Syntax Notation One
(ASN.1): Specification of basic notation".
[4] ITU-T Recommendation X.681: "Information technology - Abstract Syntax Notation One
(ASN.1): Information object specification".
[5] ITU-T Recommendation X.682: "Information technology - Abstract Syntax Notation One
(ASN.1): Constraint specification".
[6] ITU-T Recommendation X.683: "Information technology - Abstract Syntax Notation One
(ASN.1): Parameterization of ASN.1 specifications".
[7] ITU-T Recommendation Q.1400: "Architecture framework for the development of signalling and
OA&M protocols using OSI concepts".
[8] ITU-T Recommendation X.690: "Information technology - ASN.1 encoding rules: Specification of
basic encoding Rules (BER), Canonical encoding rules (CER) and Distinguished encoding rules
(DER)".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
absolute time: time of the day representing GMT
add-on charge: single additional charge which does not change the current tariff
charge: number of charge units (for the usage of a chargeable event (telecommunication service))
charge determination point: point is a point (exchange or IN-SCP/Service provider) that determines which
tariff/add-on charge should be applied
charge generation point: exchange where online charging is performed (i.e. conversion of tariff per time to cost),
e.g. the originating local exchange for advice of charge purposes
ETSI

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charge registration point: exchange that collects the information to be used for the actual charging of the call or
service (either on meter-pulse counters or in call data records)
charge unit: base element for the charging process, expressed as meter-pulse units or as currency value
charging: calculation of the number of charge units, based on the chargeable event and its corresponding add-on
charge/tariff
connection control point: connection control point is an exchange (e.g. IN-SSP) which controls calls which consist of
multiple connection configurations (e.g. calls with introducing announcements, re-routing, follow-on, conferences)
start of charge: point in time where the condition to start charging are fulfilled, e.g. the connection between two
subscribers is established
NOTE: Within the most networks charging is started directly with receipt of the Answer message. Each network
operator - or in case of application of the charging messages over network boundaries each of the
involved network operators - has to define the conditions for starting charging individually. However all
the definitions base on the receipt of some kind of "connected" information.
stop of charge: point in time where the condition to stop charging is fulfilled, e.g. the connection between two
subscribers is cleared
NOTE: Within the most networks charging is stopped directly on receipt of the Release message.
subtariff: within a tariff sequence, a charge unit per time unit
NOTE: Each subtariff has an individual duration and an individual charge unit.
tariff: set of parameters used for charging purposes to calculate the numbering charge units for the telecommunication
service or a group of telecommunication services used
NOTE: A tariff consists of a tariff sequence.
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 up to 4 consecutive subtariffs which has to be applied for the charging of the communication
event
NOTE: The subtariffs are applied at the start of the communication event and are applied consecutively according
to the list of the subtariffs. The last subtariff may have an unlimited duration.
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AE Application Entity
AEI Application Entity Instance
ALS Application Layer Structure
AOC-E Advice Of Charge at the End of the call
AOCRG Add-On ChaRGing information
AP Application Process
APM APplication transport Mechanism
ASE Application Service Element
ATII Application Transport Instruction Indicators
BER Basic Encoding Rules
CCP Connection Control Point
CDP Charge Determination Point
CDR Call Data Record
CGP Charge Generation Point
CRGA ChaRGing Acknowledgement information
CRGT ChaRGing Tariff information
CRI Charging Reference Identifier
CRP Charge Registration Point
ETSI

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GMT Greenwich Mean Time
ID IDentification
ISUP ISDN User Part
MTP Message Transfer Part
NI Network Interface
OLE Originating Line Exchange
OSI Open System Interconnection
SACF Single Association Control Function
4 Specification structure
The description of the ISDN User Part procedures in the present document is structured according to figure C.1 in
annex C. The present document uses OSI ALS specification techniques described in [7].
The description is thus divided into two main parts:
• protocol functions;
• non-protocol functions, i.e. exchange nodal functions; this is referred to as the "Application Process".
The present document describes only the part of the total Application Process and protocol functions in the exchange
that relates to the transfer of charging related information between a charge determination point and a charge
registration or charge generation point.
The protocol functions are subdivided into three parts: Charging ASE, Application Transport Mechanism (APM ASE)
and ISUP Basic Call (ISUP ASE). These are co-ordinated by the Single Association Control Function (SACF).
The ISUP ASE is defined in [1]. It is not the intention of the present document to re-define ISUP [1] in ALS format.
The Application Transport Mechanism is specified in [2].
The Charging ASE is a user of the services offered by the APM ASE. It is responsible for preparing the charging
information in a form that can be transported by the Application Transport Mechanism.
This separation of the procedural description provides a logical and convenient document structure but does not imply
that the ISUP protocol itself is separated: e.g. in the context of the present document, the Initial Address message
always signifies the simultaneous set-up of a bearer and an associated call.
The service primitive technique, used to define the ASEs and the SACF specific to the application's signalling needs, is
a way of describing how the services offered by an ASE, or SACF - the provider of (a set) of service(s) - can be
accessed by the user of the service(s) - the SACF or the Application Process, respectively.
The service primitive interface is a conceptual one and is not a testable or accessible interface. It is a descriptive tool.
The use of service primitives at an interface does not imply any particular implementation of that interface, nor does it
imply that an implementation shall conform to that particular service primitive interface to provide the stated service.
All conformance to the ISUP specifications is based on the external behaviour at a node, i.e. on the generation of the
correct message structure (as specified in [1]), operation structure (as specified in the present document) and in the
proper sequence (as specified in [1] and the present document).
The interfaces between SACF and APM ASE, to ISUP basic call signalling ASE, between SACF and NI, and to MTP-3
are described in [2].
ETSI

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5 Description
5.1 General description
The present document specifies the procedures for the transfer of charging related information between a charge
determination point, a connection control point and a charge registration or charge generation point (see also annex B).
A charge determination, connection control, charge registration and charge generation point of the call may be located
within the network of one operator (single network operator environment) or may be located in different networks of
different operators (multi-operator environment).
The configuration of several charge determination points for one call is possible. It is assumed that there is only one
CGP for the call. Moreover, it is assumed for the present document that there is either one CRP for each CDP or one
CRP for all CDPs.
The transferred tariff information represents direct tariff or add-on charge (no pointers to charging data), either in
meter-pulse format or in currency forma
...