SIST-V ETSI/EG 201 916 V1.1.1:2003

SLOVENSKI STANDARD
SIST-V ETSI/EG 201 916 V1.1.1:2003
01-november-2003
Storitve in protokoli za napredna omrežja (SPAN) - Dostop ponudnika storitve -
Razvoj standardov za podporo odprtih medomrežnih vmesnikov in dostopa
ponudnika storitve
Services and Protocols for Advanced Networks (SPAN) - Service Provider Access -
Development of standards to support Open Inter-Network Interfaces and Service
Provider Access
Ta slovenski standard je istoveten z: EG 201 916 Version 1.1.1
ICS:
33.040.35 Telefonska omrežja Telephone networks
SIST-V ETSI/EG 201 916 V1.1.1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-V ETSI/EG 201 916 V1.1.1:2003

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SIST-V ETSI/EG 201 916 V1.1.1:2003

ETSI EG 201 916 V1.1.1 (2001-10)
ETSI Guide


Services and Protocols for Advanced Networks (SPAN);
Service Provider Access;
Development of standards to support Open Inter-Network
Interfaces and Service Provider Access

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Reference
DEG/SPAN-141605
Keywords
Access
ETSI
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© European Telecommunications Standards Institute 2001.
All rights reserved.

ETSI

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SIST-V ETSI/EG 201 916 V1.1.1:2003
 3 ETSI EG 201 916 V1.1.1 (2001-10)
Contents
Intellectual Property Rights.4
Foreword.4
Introduction .4
1 Scope.6
2 References.6
3 Definitions and abbreviations.8
3.1 Definitions.8
3.2 Abbreviations.8
4 History and Regulatory Background.9
4.1 Development of the Market.9
4.2 EC Directives.9
5 Service aspects.9
5.1 Service Definition.9
5.2 Benchmark Services.9
5.3 Service Provider Access Management .10
6 Architectural Aspects.10
6.1 API - Architectures.12
6.2 Management Architecture.12
7 Interfaces.13
7.1 Open Access using the User to Network Interface.13
7.2 Open Access using the Network to Network interface.14
7.3 Requirements and Priorities .15
7.4 SP-PNO Scenarios analysed in this ETSI Guide.17
8 Protocol Aspects.18
8.1 Impact of a service provider's access interface on the UNI between network operators and service
providers.18
8.2 Impact of a service provider's access interface on the NNI between network operators and service
providers.29
8.3 IN Protocol and API Assessment .42
8.4 Telephony IP Harmonization Aspects.54
9 Indirect Service Provider access interface (I-SPAI).55
10 Mapping of Requirements against Benchmark Services.72
11 Management Plane requirements to support services. .75
11.1 Relationship between Management Plane, Control Plane, and User Plane.75
11.2 Management Plane categories: .75
12 Conclusions.77
13 Future Work.77
13.1 New/Emerging Protocols.77
13.2 New Requirements.77
Annex A (informative): Bibliography.78
History .79

ETSI

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 4 ETSI EG 201 916 V1.1.1 (2001-10)
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://www.etsi.org/legal/home.htm).
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
This ETSI Guide (EG) has been produced by ETSI Technical Committee Services and Protocols for Advanced
Networks (SPAN).
Introduction
The purpose of the present document is to provide a source of reference material to enable Service Providers and
Network Operators to determine standardized facilities that are available in published ETSI protocols to support the
introduction of services. The present document also validates a number of benchmark services initially identified by the
European Commission [1] for third-party service provision using a generic capability set for Open Intelligent Network
Interconnection and the Service Provider Access Requirements (SPAR) that are captured in clause 7.3.
A number of open network architectural solutions are assessed including IN, Mobile Networks, Internet and ISDN.
Following regulatory and commercial drivers to expand the range and geographical scope of telecommunications
services, ETSI working groups are identifying new requirements and developing appropriate standards solutions to
support open inter-network and service provider access. The present document covers the Open Inter-Network and
nd
Open Network Access Requirements for the Fixed Network, 2 and 3rd Generation Mobility and Network
Management. It addresses these requirements by taking a top down approach including Service requirements,
Functional and Physical Architectures.
The present document commences with an introduction to the initial benchmark services to be provided by a Service
Provider/Network Operator under European Commission mandate BC-T-305 [1] using Intelligent Network
Interconnection. The present document then describes open access options via either Circuit Related and Non circuit
related interfaces utilizing both direct service provider interconnection, via a SPAI, and indirect service provider
interconnection via an intermediate Network.
The present document enumerates the activities in relation to the production of a set of open standards for internetwork
control plane, management plane and service provider access interfaces. A Public Network Operator can also take the
SP role, and indeed nothing in the present document should be taken as precluding such a possibility.
The Service Provider definition is not intended to map to certain country-specific meanings of the term, which are often
taken as being "resellers", but is strictly intended in this context to cover the role of producing the telecommunications
service.
ETSI

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Requirement Documents
SPA
EG 201 722
EG 201 897
PNO
EG 201 807
SP API
EG 201 899
Management
EG 201 965
Management
SPAI
Switching
Transmission (MP)
'X'
Management Management
SPAI
'Q'
'Q'
(CP/UP)
Switching Switching
Transmission Transmission
Called party
NNI
Calling party
UNI
PNO PNO

Figure 1: Reference Architecture for SP-PTN interfaces
ETSI

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1 Scope
The present document aims to facilitate the technical introduction of open inter-network and service provider access. It
includes architectural scenarios and guidelines, and identifies implementation requirements to support these more
advanced services. The format is based on a staged approach, covering both circuit-related (CR) and non-circuit-related
(NCR) interfaces, including IN-related signalling technologies. It commences with the definition of service provider
architectural and implementation capabilities, the implementation of which is initially based on standards existing at the
start of the work. ETSI TC SPAN (that has produced the present document) has also been responsible for co-ordination
and the enhancement of protocols, where necessary, in order to meet the Service Provider Access Requirements (SPAR)
as outlined in the present document. Open Service Provider access is enabled by means of enhanced User to Network
and Network-to-Network Interfaces. A number of Initial benchmark Services together with Service support and network
management requirements are also considered.
Cross-referencing of the SPAR requirements and the candidate protocols is detailed through sets of tables. Existing
protocol standards are utilized in the analysis, and are considered as candidates for re-use. Emerging protocols and APIs
were also considered.
The overall objective of the present document is to map out the facilities and protocols needed to allow delivery of
telecommunications services across multiple networks, including networks that may be geographically or technically
diverse in nature. Where lack of support in protocol capabilities has been identified, these deficiencies are noted as
items for further work.
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.
[1] ETSI ETR 244: "Intelligent Network (IN); ETSI workplan for IN; (Mandate BC-T-305, step 1)".
[2] ETSI EG 201 722: "Intelligent Network (IN); Service provider access requirements; Enhanced
telephony services".
[3] ETSI EG 201 807: "Network Aspects (NA); Intelligent Network (IN); Network operators'
requirements for the delivery of service provider access".
[4] ETSI EG 201 897: "Services and Protocols for Advanced Networks (SPAN); Service Provider
Access; Service Provider Access Requirements in a Fixed and Mobile Environment".
[5] Directive 97/33/EC of the European Parliament and of the Council of 30 June 1997 on
interconnection in Telecommunications with regard to ensuring universal service and
interoperability through application of the principles of Open Network Provision (ONP).
[6] Directive 98/10/EC of the European Parliament and of the Council of 26 February 1998 on the
application of open network provision (ONP) to voice telephony and on universal service for
telecommunications in a competitive environment.
[7] ETSI ETS 300 208: "Integrated Services Digital Network (ISDN); Freephone (FPH)
supplementary service; Service description".
[8] ETSI ETS 300 712: "Integrated Services Digital Network (ISDN); Public Switched Telephone
Network (PSTN); Premium Rate (PRM) service; Service description".
[9] ETSI ETS 300 711: "Integrated Services Digital Network (ISDN); Public Switched Telephone
Network (PSTN); Virtual Card Calling (VCC); Service description".
ETSI

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[10] ETSI ETS 300 779 (Edition 1): "Network Aspects (NA); Universal Personal Telecommunication
(UPT); Phase 1 - Service description".
[11] ETSI EG 201 965: "Services and Protocols for Advanced Networks (SPAN); Service Provider
Access; Service Provider Access Management Requirements for Open Network Access".
[12] ETSI EN 300 403-1 through 7:"Integrated Services Digital Network (ISDN); Digital Subscriber
Signalling System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call
control; Part 1: Protocol specification [ITU-T Recommendation Q.931 (1993/8) modified]". and
subsequent parts.
NOTE: Supplementary Services (SS) are described elsewhere.
[13] ETSI ETS 300 356-1 through 19: "Integrated Services Digital Network (ISDN); Signalling System
No.7; ISDN User Part (ISUP) version 2 for the international interface; Part 1: Basic services
[ITU-T Recommendations Q.761 to Q.764 (1994)]", and subsequent parts. ISUP Version 2.
[14] ETSI EN 300 356-1 through 36: "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]", and subsequent parts. ISUP
Version 3.
[15] ETSI EN 300 356-1 through 21: "Integrated Services Digital Network (ISDN); Signalling System
No.7; ISDN User Part (ISUP) version 4 for the international interface; Part 1: Basic services
[ITU- T Recommendations Q.761 to Q.764 (2000) modified]", and subsequent parts; ISUP
Version 4.
[16] ETSI ETS 300 121 (Edition 1): "Integrated Services Digital Network (ISDN); Application of the
ISDN User Part (ISUP) of CCITT Signalling System No.7 for international ISDN interconnections
(ISUP version 1)". (Based on ITU-T recommendation Q.767)
[17] ETSI TS 129 002: "Digital cellular telecommunications system (Phase 2+) (GSM); Universal
Mobile Telecommunications System (UMTS); Mobile Application Part (MAP) specification
(3GPP TS 29.002)".
[18] ETSI ETS 300 374-1: "Intelligent Network (IN); Intelligent Network Capability Set 1 (CS1); Core
Intelligent Network Application Protocol (INAP); Part 1: Protocol specification".
[19] ETSI EN 301 140-1 (V1.3.4): "Intelligent Network (IN); Intelligent Network Application Protocol
(INAP); Capability Set 2 (CS2); Part 1: Protocol specification".
[20] ETSI TS 122 078: "Digital cellular telecommunications system (Phase 2+) (GSM); Universal
Mobile Telecommunications System (UMTS); Customised Applications for Mobile network
Enhanced Logic (CAMEL); Service description; Stage 1(3GPP TS 22.078)".
[21] ETSI EG 201 899 (V1.1.1): "Services and Protocols for Advanced Networks (SPAN); Service
Provider Access; Modelling service provider access requirements using an API approach".
[22] ETSI ES 201 915-1 through 12: "Open Service Access; Application Programming Interface;
Part 1: Overview".
[23] ETSI EG 201 988-1: "Services and Protocols for Advanced Networks (SPAN); Service Provider Access
Requirements (SPAR); Open Service Access for API requirements version 1".
[24] ETSI EG 201 988-2: "Services and Protocols for Advanced Networks (SPAN); Service Provider Access
Requirements (SPAR); Open Service Access for API requirements version 2".
[25] ETSI ES 201 296: "Integrated Services Digital Network (ISDN); Signalling System No.7; ISDN
User Part (ISUP); Signalling aspects of charging".
[26] ETSI ETR 172: "Business TeleCommunications (BTC); Virtual Private Networking (VPN);
Services and networking aspects; Standardization requirements and work items".
[27] ETSI EG 201 367: "Intelligent Network (IN); Number Portability Task Force (NPTF); IN and
Intelligence Support for Service Provider Number Portability".
ETSI

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[28] ETSI TR 101 917-1 through 12: "Services and Protocols for Advanced Networks (SPAN); API
mapping for Open Service Access; Part 1: General issue on API mapping".
[29] ETSI EG 201 988-3: "Services and Protocols for Advanced Networks (SPAN); Service Provider
Access Requirements (SPAR); Mapping of Open Service Access for API version 1 to SPA
requirements".
[30] ETSI EN 300 650: "Integrated Services Digital Network (ISDN); Message Waiting Indication
(MWI) supplementary service; Service description".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions of Service Provider related terms given in [2], [3]
and [4] apply.
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
API Application Programme Interface
BICC Bearer Independent Call Control
CAMEL Customized Application for Mobile networks Enhanced Logic
CdPy Called Party
CgPy Calling Party
CS-1 IN Capability Set 1
CUSF Call Unrelated Service Function
DSS1 Digital Subscriber Signalling System No. 1
GMSC Gateway Mobile Switching Centre
HLR Home Location Register
IN Intelligent Network
INAP Intelligent Network Application Part
IP Internet Protocol
ISDN Integrated Services Digital Network
ISUP ISDN User Part
MAP Mobile Application Part
NNI Network-Network Interface
ONP Open Network Provision
PTN Public Telecommunications Network
PTNorig Public Telecommunications Network originating
PTNterm Public Telecommunications Network terminating
SCF Service Control Function
SP Service Provider
SPAI Service Provider Access Interface
SPorig Service Provider originating
SPterm Service Provider terminating
SS Supplementary Service
SSF Service Switching Function
SSL Secure Sockets Layer
TC Transaction Capabilities
UNI User-Network Interface
UPT Universal Personal Telecommunications
UUS User User Signalling
VMSC Visited MSC
VPN Virtual Private Network
ETSI

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4 History and Regulatory Background
4.1 Development of the Market
In the original European work done in the 1980s, a clear link was drawn between the availability of economically
efficient telecommunications services and the development of the economy of the region as a whole. Stimulating
competition to enable these services was seen as key.
The development of competition in the telecommunications market in Europe has been characterized, initially, by the
liberalization of services, at the beginning of the 1990s. This was followed in 1998 by the liberalization of the provision
of infrastructure.
However, for a provider to deliver services where they do not themselves have control of the access network, this will
necessitate interconnection with and access to the network of a relevant network operator. This access has been limited
to ordinary user plane interconnection (call origination, transit and call termination), with the attendant limitations on
the type of services that can be delivered using this mechanism.
In order to enable advanced services, enhanced forms of access are required. These forms fall into two generic
types - control plane access and management plane access. It is in this context that the current work has been
progressed.
4.2 EC Directives
EC directives 97/33/EC [5] and 98/10/EC [6] require reasonable requests for access to the networks of operators with
Significant Market Power (SMP) to be met. In order to reduce the costs for all parties concerned, this work is aimed at
standardizing as many of the envisaged capabilities as possible.
5 Service aspects
In developing the present document, five initial benchmark services have been identified, see [1]. These are currently
supported under IN and terminal mobility signalling protocols. The benchmark services will be utilized to test the
extension of the signalling protocols in support of open network access.
5.1 Service Definition.
Services, as defined by current ETSI Standards, are taken within the present document as a benchmark for consideration
of protocol support - see Benchmark IN services as listed in clause 5.1.2. Service Providers have the opportunity to
develop these or create their own services to meet specific user requirements. Such services may be developed by
utilizing the flexibility offered through an API or by an IN.
5.2 Benchmark Services
A list of benchmark services are listed in table 1 as defined in ETR 244 [1].
The identified services all have existing service definition for either the PSTN or the ISDN, as defined in table 1.
Table 1: Identification of service definitions for benchmark services (see note)
Identified service PSTN service definition ISDN service definition
Freephone --- ETS 300 208 [7]
Premium rate ETS 300 712 [8] ETS 300 712 [8]
Virtual card calling ETS 300 711 [9] ETS 300 711 [9]
Virtual private network ETR 172 [26] (see note) ETR 172 [26] (see note)
Universal personal telecommunications ETS 300 779 [10] ETS 300 779 [10]
NOTE: This is not a service, but an alternative means of provision of existing services defined for the private network.
ETR 172 [26] identifies the work items required for this definition.
ETSI

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The benchmark services have been used to specify the Open-INAP Protocol work being developed by ETSI
WG-SPAN12 as a special PICS Proforma (DEN/SPAN-120084 (see bibliography)) to accompany IN CS-3, and they
have also been mapped in the present document against the capabilities noted in the requirements clause 7.3 of the
present document.
NOTE: ETSI WG-SPAN12 are also using the number portability service as defined in EG 201 367 [27] as an
additional benchmark service for OPEN-INAP.
5.3 Service Provider Access Management
Network Management requirements to support Service Provider Access are listed in the companion Guide EG 201 965 [11].
6 Architectural Aspects
A signalling connection between a public telecommunications network operator and a service provider is shown below
in figure 2. The physical connection of the call is only extended from the public telecommunications network to the
service provider's equipment for circuit related (CR) access.
For calls from a calling party (CgPy) in the originating PTN (PTNorig) to a called party (CdPy) in the terminating PTN
(PTNterm), in which both PTNs and SPs are involved, various call connection scenarios are possible. Figure 2
visualizes two examples of a call connection scenario from the viewpoint of the requirements of the SPs of the
originating- and terminating-call-related services, called SPorig and SPterm, respectively.

Legend: Tw o-w ay speech and/or signalling path of scenario A =
T w o-way speech and/or signalling path of scenario B =
SP O rig SP T erm
Services of
Services of
term inating calls
originating calls
SPAI SPAI
B earer extended
for C R case
PTN Term
PTN O rig PT N T erm
PTN Transit
Scenario B Scenario A
C alled P arty (C dP y)
C alling P arty (C gP y)

Figure 2: Examples of call connection scenarios for circuit related SP access
Scenario A is an example of a call in which SPorig is involved. In this scenario A, the call is forwarded from the
PTNorig to SPorig which provides a service to the call. SPorig returns the call to the PTNorig. The call is then
forwarded from the PTNorig, eventually via a transit network (PTNtran), to the PTNterm in which the call is terminated
at the called party's (CdPy) line.
ETSI

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Scenario B is an example of a call in which both the SPorig and the SPterm are involved. In this scenario, the call is
forwarded from the PTNorig to SPorig which provides a service to the call. SPorig returns the call to the PTNorig. The
call is then forwarded from the PTNorig, eventually via a transit network (PTNtran), to the PTNterm. Then, from the
PTNterm the call is forwarded to SPterm which provides a service to the call. SPterm returns the call to the PTNterm, in
which the call is terminated at the called party's (CdPy) line.
For calls from a calling party (CgPy) in the originating PTN (PTNorig) to a called party (CdPy) in the terminating PTN
(PTNterm), in which both PTNs and SPs are involved, various call connection scenarios are possible. Figure 3
visualizes two examples of a call connection scenario in the NCR case from the viewpoint of the requirements of the
SPs of the originating- and terminating-call-related services, called SPorig and SPterm, respectively.

Legend: Two-way speech and/or signalling path of scenario C =
Two-way speech and/or signalling path of scenario D =
N on-circuit related signalling path of scenario C =
Non-circuit related signalling path of scenario D =
SP O rig SP Term
Services of
Services of
terminating calls
...