Abstract

This European Telecommunication Standard (ETS) gives the stage 2 descr iption of the Advice of Charge (AoC) supplementary services. The charging supplementary services currently defined are: - Advice of Charge (Information) (AoCI) (clause 1); - Advice of Charge (Charging) (AoCC) (clause 2).

Status
Published
Publication Date
30-Nov-2003
ICS
33.070.50 - Global System for Mobile Communication (GSM)
Technical Committee
SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Dec-2003
Due Date
01-Dec-2003
Completion Date
01-Dec-2003
Ref Project
ETSI ETS 300 935 ed.1 (1997-05) - Digital cellular telecommunications system; Advice of Charge (AoC) supplementary services; Stage 2 (GSM 03.86 version 5.0.1)

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SIST ETS 300 935 E1:2003 is the Slovenian edition of ETS 300 935 Edition 1 from ETSI. It specifies the stage 2 behavior of the Advice of Charge (AoC) supplementary services in digital cellular telecommunications systems, covering Advice of Charge (Information) (AoCI) and Advice of Charge (Charging) (AoCC). The document is written for GSM network and mobile equipment implementations that need to generate, carry, acknowledge, store, and act on charging information.

What does SIST ETS 300 935 E1:2003 specify?

SIST ETS 300 935 E1:2003 specifies the stage 2 description of AoC supplementary services for the digital cellular telecommunications system. In practice, it defines how the network and the mobile equipment exchange charging information, how subscriber service state is stored, and how roaming and handover affect the service.

The document is organized into a short front section, the scope and normative references, then two main service clauses:

  • Clause 1 - Advice of Charge (Information) (AoCI)
  • Clause 2 - Advice of Charge (Charging) (AoCC)

It also includes:

  • Annex A - normative information stored in the MSC
  • Annex B - informative status of GSM 03.86

AoC is stated as not applicable to emergency calls in the service clauses. That matters because implementers must not rely on AoC behavior for emergency-call handling.

AnnexWhat it covers
Annex AInformation stored in the MSC, including the tables used to generate Charge Advice Information (CAI)
Annex BInformative status history of GSM 03.86

What are the key requirements of SIST ETS 300 935 E1:2003?

The most important requirements are the service control rules in clauses 1 and 2, the handling of charging information, and the storage and transfer of service state between network registers. These are the points that affect call setup, call continuation, charging display, and subscriber reachability.

AoCI behavior in the network and the mobile equipment

Clause 1.1 says the MSC generates Charge Advice Information (CAI) when AoC is initiated or when a charge is modified. Clause 1.2 says the mobile equipment should start charging calculations as soon as possible after receiving charging information, amend those calculations according to GSM 02.24, and stop them when the call ends. The practical effect is that the handset or mobile station must update the user-facing charging estimate promptly and keep it aligned with network charging changes.

Clause 1.2 also says reception of CAI is acknowledged only if the MS supports AoCI functionality as specified in GSM 02.24 and GSM 02.86, although the network does not act on that acknowledgement in the AoCI case. For implementers, that means acknowledgement is part of the protocol behavior, but it is not used to control the network response for AoCI.

AoCC behavior, call control, and timer T(AoC)

Clause 2.1 states that when AoCC is invoked, the network sends CAI to the mobile station and allows the call to continue while waiting for an acknowledgement. The waiting time is controlled by Timer T(AoC), and expiry of that timer causes call clearing. This is the main network-side control rule for charge-based call handling.

Clause 2.2 adds mobile-side thresholds based on ACM and ACMmax. For mobile originated calls, the MS shall prevent call setup when ACM is equal to or greater than ACMmax. For mobile terminated calls, setup is still allowed, but if the call is chargeable and ACM reaches or exceeds ACMmax, the call shall be released. During an active call, the MS shall also release the call when ACM reaches or exceeds ACMmax. In practice, this is how the service enforces a charging limit on outgoing and ongoing calls.

Roaming handling for AoCC

Clause 2.4 defines what happens when an AoCC subscriber enters an MSC area that does not support AoCC, or is subscribed while roaming in such an area. The HLR shall mark roaming as restricted in that area, which prevents further mobile terminated traffic and makes the MS unreachable. When the subscriber enters an AoCC-supporting area, the restriction is removed in the HLR. When AoCC is withdrawn, the restriction is removed in both the HLR and VLR, independently of other roaming restrictions. This matters for service availability and for correct reachability behavior during roaming.

Subscriber state storage and transfer

Clauses 1.4 and 2.5 require the HLR to store the logical state of AoCI and AoCC on a per-subscriber basis. Clauses 1.6 and 2.7 require the HLR to send that logical state to the VLR when a subscriber registers, and to update the VLR if the state changes while the subscriber is registered. Clauses 1.7 and 2.8 require the VLR to store the state information received from the HLR. The practical consequence is that the visited network can apply the right service behavior for a roaming subscriber.

Handover and network data

Clauses 1.8 and 2.9 state that handover has no impact on the AoC control procedure. Annex A then identifies the tables the MSC needs in order to generate CAI, based on service request, call destination, type of day, and time of day. That means the charging data comes from predefined network tables rather than ad hoc calculation rules.

What terms does SIST ETS 300 935 E1:2003 define?

  • Advice of Charge (AoC) - the umbrella supplementary service family covered by the document.
  • Advice of Charge (Information) (AoCI) - the AoC service in clause 1, where charging information is generated and sent to the mobile equipment.
  • Advice of Charge (Charging) (AoCC) - the AoC service in clause 2, where charging information is used to control call handling against charging limits.
  • Charge Advice Information (CAI) - the charging information generated by the network and sent to the mobile station.
  • Timer T(AoC) - the waiting timer used by AoCC while the network waits for acknowledgement of CAI.
  • ACMmax - the threshold value used by AoCC to decide when call setup must be blocked or an active call must be released.
  • SDL diagram - the state/behavior diagram used in the clauses to show MSC and mobile equipment control flow.

Who uses SIST ETS 300 935 E1:2003?

SIST ETS 300 935 E1:2003 is used by GSM network operators, switching engineers, charging system designers, and mobile equipment implementers. It is also relevant to service providers and roaming planners because it defines how service state is stored, transferred, and withdrawn.

In practice, the document supports:

  • MSC and network control implementation
  • handset or mobile station charging display and enforcement logic
  • HLR and VLR service-state handling
  • roaming behavior design and troubleshooting
  • charging-related testing and integration

Which standards are used with SIST ETS 300 935 E1:2003?

The document names four normative references:

  • GSM 01.04 - provides the abbreviations and acronyms used in the ETS.
  • GSM 02.24 - defines the description of Charge Advice Information (CAI) and how charging calculations are handled.
  • GSM 02.86 - gives the stage 1 description of AoC supplementary services.
  • GSM 03.11 - provides the technical realization framework for supplementary services, including the notation used for logical states.

These references supply the background definitions and related service behavior that this ETS depends on.

What does the SIST ETS 300 935 E1:2003 document contain?

The document contains MSC and mobile equipment SDL diagrams for both AoCI and AoCC, plus information flow diagrams showing call setup, charging information transfer, acknowledgement, and call clearing behavior. It also includes state transition models for the service logic states stored in the HLR.

Annex A lists the MSC-side charging tables used to generate CAI, including unit and time interval tables and scaling values. Annex B gives the publication status history of GSM 03.86. Together, these parts show how the service is controlled in the network, how the subscriber state is managed, and what data the MSC uses to produce charging advice.

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Frequently Asked Questions

SIST ETS 300 935 E1:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Digital cellular telecommunications system; Advice of Charge (AoC) supplementary services; Stage 2 (GSM 03.86 version 5.0.1)". This standard covers: This European Telecommunication Standard (ETS) gives the stage 2 descr iption of the Advice of Charge (AoC) supplementary services. The charging supplementary services currently defined are: - Advice of Charge (Information) (AoCI) (clause 1); - Advice of Charge (Charging) (AoCC) (clause 2).

This European Telecommunication Standard (ETS) gives the stage 2 descr iption of the Advice of Charge (AoC) supplementary services. The charging supplementary services currently defined are: - Advice of Charge (Information) (AoCI) (clause 1); - Advice of Charge (Charging) (AoCC) (clause 2).

SIST ETS 300 935 E1:2003 is classified under the following ICS (International Classification for Standards) categories: 33.070.50 - Global System for Mobile Communication (GSM). The ICS classification helps identify the subject area and facilitates finding related standards.

SIST ETS 300 935 E1:2003 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-december-2003
'LJLWDOQLFHOLþQLWHOHNRPXQLNDFLMVNLVLVWHP±'RSROQLOQDVWRULWHYREYHVWLORRFHQL
$2& ±6WRSQMD *60UD]OLþLFD
Digital cellular telecommunications system; Advice of Charge (AoC) supplementary
services; Stage 2 (GSM 03.86 version 5.0.1)
Ta slovenski standard je istoveten z: ETS 300 935 Edition 1
ICS:
33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN ETS 300 935
TELECOMMUNICATION May 1997
STANDARD
Source: ETSI TC-SMG Reference: DE/SMG-030386Q
ICS: 33.020
Key words: Digital cellular telecommunications system, Global System for Mobile communications (GSM)
R
GLOBAL SYSTEM FOR
MOBILE COMMUNICATIONS
Digital cellular telecommunications system;
Advice of Charge (AoC) supplementary services - Stage 2
(GSM 03.86 version 5.0.1)
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.fr
Tel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright
and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1997. All rights reserved.

Page 2
ETS 300 935 (GSM 03.86 version 5.0.1): May 1997
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

Page 3
ETS 300 935 (GSM 03.86 version 5.0.1): May 1997
Contents
Foreword .5
0 Scope .7
0.1 Normative references.7
0.2 Abbreviations .7
1 Advice of Charge (Information) (AoCI).8
1.1 Advice of Charge (Information) MSC SDL diagram.8
1.2 Advice of Charge (Information) mobile equipment SDL diagram .8
1.3 Advice of Charge (Information) information flow diagram .8
1.4 Information stored in the HLR.12
1.5 State transition model .12
1.6 Transfer of Information from HLR to VLR .12
1.7 Information stored in the VLR.12
1.8 Handover.12
2 Advice of Charge (Charging) (AoCC).13
2.1 Advice of Charge (Charging) MSC SDL diagram.13
2.2 Advice of Charge (Charging) mobile equipment SDL diagram.13
2.3 Advice of Charge (Charging) information flow diagram.13
2.4 AoCC subscriber roaming requirements .13
2.5 Information stored in the HLR.18
2.6 State transition model .18
2.7 Transfer of Information from HLR to VLR .18
2.8 Information stored in the VLR.18
2.9 Handover.18
Annex A (normative): Information stored in the MSC.19
Annex B (informative): Status of GSM 03.86.20
History .21

Page 4
ETS 300 935 (GSM 03.86 version 5.0.1): May 1997
Blank page
Page 5
ETS 300 935 (GSM 03.86 version 5.0.1): May 1997
Foreword
This European Telecommunication Standard (ETS) has been produced by the Special Mobile Group
(SMG) Technical Committee (TC) of the European Telecommunications Standards Institute (ETSI).
This ETS defines the stage 2 of the Advice of Charge (AoC) supplementary services within the digital
cellular telecommunications system.
The specification from which this ETS has been derived was originally based on CEPT documentation,
hence the presentation of this ETS may not be entirely in accordance with the ETSI rules.
Transposition dates
Date of adoption: 18 April 1997
Date of latest announcement of this ETS (doa): 31 August 1997
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 28 February 1998
Date of withdrawal of any conflicting National Standard (dow): 28 February 1998

Page 6
ETS 300 935 (GSM 03.86 version 5.0.1): May 1997
Blank page
Page 7
ETS 300 935 (GSM 03.86 version 5.0.1): May 1997
0 Scope
This European Telecommunication Standard (ETS) gives the stage 2 description of the Advice of Charge
(AoC) supplementary services.
The charging supplementary services currently defined are:
- Advice of Charge (Information) (AoCI) (clause 1);
- Advice of Charge (Charging) (AoCC) (clause 2).
0.1 Normative references
This ETS incorporates by dated and undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply
to this ETS only when incorporated in it by amendment or revision. For undated references, the latest
edition of the publication referred to applies.
[1] GSM 01.04 (ETR 350): "Digital cellular telecommunications system (Phase 2+);
Abbreviations and acronyms".
[2] GSM 02.24 (ETS 300 923): "Digital cellular telecommunications system;
Description of Charge Advice Information (CAI)".
[3] GSM 02.86: "Digital cellular telecommunications system; Advice of Charge
(AoC) supplementary services - Stage 1".
[4] GSM 03.11 (ETS 300 928): "Digital cellular telecommunications system;
Technical realization of supplementary services".
0.2 Abbreviations
Abbreviations used in this ETS are listed in GSM 01.04.

Page 8
ETS 300 935 (GSM 03.86 version 5.0.1): May 1997
1 Advice of Charge (Information) (AoCI)
1.1 Advice of Charge (Information) MSC SDL diagram
The SDL diagram for the Advice of Charge (Information) supplementary service within the MSC is given in
figure 1.1.
NOTE 1: AoC (Information) is not applicable to emergency calls.
NOTE 2: The request of generation of the Charge Advice Information (CAI) applies to AoC
initiation or charge modification.
1.2 Advice of Charge (Information) mobile equipment SDL diagram
The SDL diagram for the Advice of Charge (Information) supplementary service within the mobile
equipment is given in figure 1.2. This SDL indicates when charging calculations are started, amended and
stopped, within the mobile equipment. The mobile equipment should start charging calculations as soon as
possible after receiving the charging information. Charging calculations should be amended by the mobile
equipment in accordance with GSM 02.24.
NOTE: The point at which the charging calculations are amended can occur before or after
sending the AoC Acknowledge.
Charging calculations are stopped when the call ends for any reason.
The reception of the CAI shall be acknowledged only if the MS supports the AoCI functionality specified in
GSM 02.24 and GSM 02.86, however the network does not action this acknowledgement in the
AoC (Information) case.
1.3 Advice of Charge (Information) information flow diagram
The Advice of Charge (Information) information flow diagrams are shown in figure 1.3.

Page 9
ETS 300 935 (GSM 03.86 version 5.0.1): May 1997
Process AoCI_MSC 386_11(1)
Figure 1.1
call in
progress or
call set up
in progress
Request of generation of CAI
request
applies to AoC initiation or
generation
charge modification.
of CAI
generate
CAI
send CAI
continue call
or CAI: Charge Advice Information
call set up
Figure 1.1: SDL diagram of advice of charge (information) in the MSC

Page 10
ETS 300 935 (GSM 03.86 version 5.0.1): May 1997
Process AoCI_ME 386_12(1)
call set up
Figure 1.2
in progress
charging
information
start
charge
calculations
AoC
acknowledge
AoC
active
call charging
ends information
AoC
acknowledge
Point at which charging
stop amend
calculations are amended
charge charging
can occur before or after
calculations calculations
sending the AoC acknowledge.
AoC
clear call
active
Figure 1.2: SDL diagram of advice of charge (information) in the mobile equipment

Page 11
ETS 300 935 (GSM 03.86 version 5.0.1): May 1997
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Figure 1.3: Information flow for Advice of Charge (Information)

Page 12
ETS 300 935 (GSM 03.86 version 5.0.1): May 1997
1.4 Information stored in the HLR
AoCI may have the following logical states (refer to GSM 03.11 for an explanation of the notation):
Provisioning State Registration State Activation State HLR Induction State
(Not Provisioned, Not Applicable, Not Active, Not Induced)
(Provisioned, Not Applicable, Active and Operative, Not Induced)
The HLR shall store the logical state of AoCI (which shall be one of the valid states listed above) on a per
subscriber basis.
1.5 State transition model
The following figure shows the successful cases of transition between the applicable logic states of AoCI.
The state changes are caused by actions of the service provider.
Note that error cases are not shown in the diagram as they normally do not cause a state change.
Additionally, some successful requests may not cause a state change. Hence they are not shown in the
diagram.
Provision
(Not Provisioned, (Provisioned,
Not Registered, Not Applicable,
Not Active, Active and Operative,
Not Induced) Not Induced)
Withdrawal
Figure 1.4: State transition model for AoCI
1.6 Transfer of Information from HLR to VLR
If the provisioning state for AoCI is "Provisioned" then when the served subscriber registers on a VLR the
HLR shall send that VLR information about the logical state of AoCI.
If the
...