ETSI TS 122 079 V14.0.0 (2017-03)

Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Support of Optimal Routeing (SOR); Service definition; Stage 1 (3GPP TS 22.079 version 14.0.0 Release 14)

RTS/TSGS-0122079ve00

General Information

• Status: Published
• Publication Date: 27-Mar-2017
• Technical Committee: 3GPP SA 1 - Services
• Current Stage: 12 - Completion
• Completion Date: 28-Mar-2017

Standards Content (Sample)

ETSI TS 122 079 V14.0.0 (2017-03)






TECHNICAL SPECIFICATION
Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS);
Support of Optimal Routeing (SOR);
Service definition;
Stage 1
(3GPP TS 22.079 version 14.0.0 Release 14)

R
GLOBAL SYSTEM FOR
MOBILE COMMUNICATIONS

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3GPP TS 22.079 version 14.0.0 Release 14 1 ETSI TS 122 079 V14.0.0 (2017-03)



Reference
RTS/TSGS-0122079ve00
Keywords
GSM,UMTS
ETSI
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3GPP TS 22.079 version 14.0.0 Release 14 2 ETSI TS 122 079 V14.0.0 (2017-03)
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 (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
http://webapp.etsi.org/key/queryform.asp.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.

ETSI

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3GPP TS 22.079 version 14.0.0 Release 14 3 ETSI TS 122 079 V14.0.0 (2017-03)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 4
1 Scope . 5
2 References . 5
3 Definitions and abbreviations . 5
4 Description of Optimal Routing . . 6
5 Functional requirements . 6
5.1 General . 6
5.2 Normal operation . 6
5.2.1 A is a fixed subscriber or a mobile subscriber who may not benefit from OR . 7
5.2.2 A is a mobile subscriber who may benefit from OR . 8
5.2.2.1 Description of the call routing . 8
5.2.2.2 Call scenarios handled in OR Phase 1 . 9
5.3 Exceptional procedures or unsuccessful outcome . 13
5.3.1 Non-support of SOR in the VPLMN of the caller . 13
5.3.2 Non-support of SOR in the HPLMN of the B subscriber . 13
5.3.3 Non support of SOR in the VPLMN of the B subscriber. 13
5.3.4 Calls to special mobile network numbers . 13
6 Interactions of Optimal Routing with Supplementary Services . 14
6.1 Call Forwarding . 14
6.2 Call Barring . 14
6.3 Call Transfer . 14
6.4 Call Deflection . 14
6.5 Advice of Charge. 14
7 Interactions of Optimal Routing with Operator Determined Barring (ODB). 14
8 Interactions of Optimal Routing with CAMEL . 14
Annex A: Change history . 15
History . 16

ETSI

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3GPP TS 22.079 version 14.0.0 Release 14 4 ETSI TS 122 079 V14.0.0 (2017-03)
Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The contents of the present document are subject to continuing work within the TSG and may change following formal
TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an
identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater indicates TSG approved document under change control.
y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
updates, etc.
z the third digit is incremented when editorial only changes have been incorporated in the document.
ETSI

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3GPP TS 22.079 version 14.0.0 Release 14 5 ETSI TS 122 079 V14.0.0 (2017-03)
1 Scope
This Stage 1 description of the first phase of Support of Optimal Routing (SOR):
- compiles the basic service requirements for SOR;
- describes the interactions for Supplementary Services (SS) in order to cater for SOR;
- refers to modifications to network features required by SOR.
This specification does not address the following:
- There is no need for optimisation of the routing of calls originally directed to a fixed network subscriber, because
the physical address of a fixed network terminating line cannot differ from its logical address.
- SOR in non-PLMNs is not a subject of this TS, but might be possible by bilateral arrangement between PLMN
operators and those non-PLMN operators.
The purpose of SOR is to reduce the number of unnecessary inter-PLMN call legs.
The first phase of SOR applies to:
- OR for the benefit of the B party i.e. Mobile terminated calls with late call forwarding to the home or visited
country (scenarios 1 and 2),
and optionally;
- OR for the benefit of the A party, e.g. Mobile to mobile calls where both mobile subscribers are in the same
country (scenarios 3 to 10).
The complete set of scenarios included in the phase 1 of OR is presented in the paragraph for normal procedures. All
other scenarios are excluded from Phase 1 of OR.
Note that Optimal Routing is applicable to national roaming situations, that is to calls directed to a mobile subscriber
roaming in her home country, but registered in a PLMN different from her HPLMN.
All further call scenarios, including multiple call forwarding, are left to subsequent phases of SOR. Subsequent phases
of SOR shall be backwards compatible with this first phase.
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, edition number, version number, etc.) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including
a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same
Release as the present document.
[1] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".
3 Definitions and abbreviations
Administrative PLMN: The complete set of all functional entities normally regarded as a single PLMN.
Basic OR : Routeing of a call by the direct route when no forwarding occurs.
ETSI

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3GPP TS 22.079 version 14.0.0 Release 14 6 ETSI TS 122 079 V14.0.0 (2017-03)
Direct route: A call uses the direct route if it is routed from the serving network of the original calling party to the
serving network of the ultimate called party without any intermediate PLMN.
HPLMN route: A call uses the HPLMN route if the destination is deduced from the MSISDN of the called party. This
forces the call to be routed via the HPLMN of the called party.
HPLMN leg: The HPLMN leg is that part of the HPLMN route from the IPLMN to the HPLMN of the called party.
IPLMN: An IPLMN is a PLMN which interrogates the HPLMN of a called party in order to determine the whereabouts
of that party.
Early Call Forwarding : Early Call Forwarding is Call Forwarding performed from the IPLMN before the call has
been extended to the VPLMN of the forwarding subscriber (i.e. Call Forwarding Unconditional and Conditional Call
Forwarding on Not Reachable known at the IPLMN before extension of the call)
Functional PLMN: For the purposes of this description the Administrative PLMN is divided into functional PLMNs
that represent different aspects of the Optimal Routeing functionality.
Late Call Forwarding: Late Call Forwarding is Call Forwarding performed after the call has been extended to the
VPLMN of the forwarding subscriber (i.e. Conditional Call Forwarding on Busy, Conditional Call Forwarding on No
Reply and Conditional Call Forwarding on Not Reachable detected in the VPLMN of the forwarding subscriber). Late
Call Forwarding may be invoked in the IPLMN or in the VPLMN of the forward
...