DOCUMENT #:
GSC13-GTSC6-02
FOR:
Presentation
SOURCE:
ETSI Board
AGENDA ITEM:
4.1
CONTACT(S):
fernando@soriano.mobi
claudio.gentile@telecomitalia.it
david.boswarthick@etsi.org
Report on ETSI
NGN Interconnection of Services
Strategic Topic
Fernando Soriano
Claudio Gentile
ETSI Board Members
Presenter: Mike Sharpe
Submission Date:
June 27, 2008
INDEX
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Introduction
Rationale
Gap Analysis
Workshop NGN Interconnection
Work Ahead
2
ETSI NGN Interconnection
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Introduction
Rationale
Gap Analysis
Workshop NGN Interconnection
Work Ahead
3
Introduction
• Within the topic of “Service level Interconnection of NGN
Services” ETSI:
– Intends to give a step forward and to highlight the importance of
interconnection at the service level for Next Generation Network
– Shows its determination to take the required steps to lead the creation of
the interconnection standard
– and wiliness to bring all parties together to collaborate in its realization
• ETSI identified three main areas of work:
– Need of Global Standard that covers IP interconnection of NGN services.
– Avoiding divergent implementations
– And assuring the global interconnection of NGN
• NGN Interconnection of Services was approved as a
strategic topic for 2008 by the General Assembly in
November 2007
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Introduction
• At Board 65, in January 2008, the initial proposal was
presented for discussion.
• The initial work identified many Organizations who are
actively elaborating specifications for IP Interconnection
• The proposed plan was based in two work streams:
Technical and Communication
• Board members agreed to initiate activities within ETSI
closer organizations, starting with 3GPP and the GSMA.
• ETSI approach was successfully launched on the
workshop organized on June 9th in Sophia Antipolis
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ETSI NGN Interconnection
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Introduction
Rationale
Gap Analisys
Workshop NGN Interconnection
Work Ahead
6
Rationale
• ETSI goal is the re-assure the elaboration of a global Standard for
Interconnection of NGN Services.
• Today interconnection of IP is optimized for Internet.
• Interconnection of NGN services must take in consideration Telco
requirements:
– QoS across the whole chain
– Payments, according to principles of initiating party pays (or others),
premium numbers,…
– Reduce complexity of interconnection among operators (and,
potentially, thousands of players) to achievable targets
• And this Interconnection has to be achieved at a global scale
• Out of Scope: Commercial relation itself across the chain of IMS
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Rationale
Interconnection of NGN affects to a multiple players, but difference in
their approaches creates duplication and divergence
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Standards Groups and Organizations
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Industry Initiatives
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3GPP: Working on Common IMS and also on Interconnection of IP Services
Addressing multiple industries needs (Fixed, Mobile, Cable) within Common IMS
3GPP Operational Parties, including ATIS and ETSI-TISPAN
IETF: Provides building blocks for IMS systems, like SIP and other IP-based protocols
GSMA: Has defined IPX model and is performing interconnection test
FMCA: Promotes interconnection with requirements from fixed operators
IPSphere: Is defining a model of IP Interconnection
… And new ones which could appear due to lack of the (common) standard
Regulation and recommendation
– European and Worldwide Regulators whose requirements must be taken in
consideration
– ITU-T: World Telecommunication standards
•
Internet Authorities
– ICANN: Internet domains names and DNS
– IANA: Internet numbering and addressing
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Rationale
• Input of Requirements
– Common IMS could fail unless requirements for interconnection, nomadic
and roaming aspects are standardized and assured for the whole chain
– Mobile operators, fixed operators, transport, Internet players… and regulators
– From Individual members of ETSI and, specially, from associations as GSMA
(IPX model), FMCA, i3, IPSphere and, may be, others
– Also ETSI will enrich it with its own experience (TBs, IMS Trials,…)
• Technical Work
– Most technical work to be carried out in 3GPP, included in Common IMS:
• 3GPP has already started some work for Release 8
• In addition, 3GPP work could determine if transport entities (protocols,
equipment,.) are required
– TISPAN is already doing relevant activities on Interconnection of NGN
– We should study if some aspects are still missing
• What ETSI could do
– Provide recommendations and support to the 3GPP.
– Coordinate work among TBs and with other SDOs
– Finally, elaborate TS, and when applicable the ES or EN accordingly
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ETSI NGN Interconnection
•
•
•
•
•
Introduction
Rationale
Gap Analisys
Workshop NGN Interconnection
Work Ahead
10
GAP Analysis: Requirements
GSMA IPX
Requirements
3GPP Rel-8
3GPP Rel-9
Inter-Service Provider IP
Backbone Requirements
NNI interface enabling direct service
interconnection.
In Rel-8 no requirements for an IP
backbone have been defined.
Specification of intermediate
backbone must be
considered
•Addressing and routing
•QoS, Authentication and
Authorization, Accounting
•Service Awareness
Security:
Requirements not defined in SA1.
•Public Internet, Integrity.
Network domain security is defined
•Tunnelling, Traffic splitting by SA3 (TS 33.210)
Should be defined in Rel9
(UE/SERVER)
Charging Specification
Requirement specified in SA1.
Offline charging specified in SA5.
Should be enhanced in Rel9
Addressing and Routing
Requirements partially defined in
SA1
Should be enhanced in Rel9
Service Awareness
Requirement partially specified in
SA1
Should be enhanced in Rel9
new scenarios.
Transcoding and Media
Protocol Conversion
Requirement specified in SA1
Should be adopted in Rel-9
new scenarios.
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11
GAP Analysis: Architectures
GSMA
3GPP
TISPAN
Direct or Indirect Interconnection
(Service/Transport Level)
Direct Connection (Rel8) (between
CS, IMS cores, not ISP/ASPs)
Rel 9 (SA1 starting TR) will cover
also indirect interconnection
scenarios.
Service
Interconnection
SoIX
architecture
and
use
case
scenarios defined for both direct
and indirect interconnection. Note
that IMS Direct Interconnection
was tasked to 3GPP (“II-NNI”)
Proposal of a TISPAN IPX.
E2E QoS is a must in IPX. Use
of Internet discouraged.
E2E QoS relies simply on
overprovisioning and marking of User
Plane IP packets (using DiffServ).
Both Internet and e2e QoS based
models (inter-RACS signaling is
under definition)
TISPAN IPX includes carrier grade
service interconnection
Mainly targeted to GPRS or IWLAN roaming and interworking
of data services.
Direct Interconnection for both IP
services or legacy PSTN/PLMN
multimedia serv.
Interconnection for IP services or
legacy PSTN/PLMN.
Numerous requirements over
IPX Proxy.
No technical definition for IPX proxy
No technical definition for IPX
proxy.
Some requirements over
operator Border Nodes
(screening, firewall, GRE
tunnels)
Border Nodes: IBCF + TrGW not fully
defined.
No Ix interface defined. No
firewall/QoS control. No GRE
Border Nodes: IBCF + RACS +
IBGF highly defined.
Gq’ interface: QoS/NAT/Firewall
control.
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Gap Analysis: E2E QoS Support
Evolved IP Carrier solutions shall provide E2E
QoS mechanisms (i.e. Packet Marking) between
connected parties
IP Carrier Provider
(between Service Providers –
3GPP
Interconnection e.g. Fixed/Mobile operators,
ISPs, ASPs)
IP-based Network Point*
3GPP
IP-based Network
Interconnection
Point*
E2E QoS
Final Objective
IMS signalling
VoIP real time traffic
Streaming/Interactive Traffic
GAP: QoS control is needed at
interconnection points of connected
parties to enable a global E2E QoS
support (e.g. User-to-User, User-toServer).
E-mail other best effort
traffic
*3GPP Interconnection Point: IBCF/TrGW functionalities
Divergences include the ones ilustrated,
others, not limited to them.
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ETSI NGN Interconnection
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•
•
•
•
Introduction
Rationale
Gap Analisys
Workshop NGN Interconnection
Work Ahead
14
Workshop NGN Interconnection
June 9th 2008
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Scope:
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Aim:
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o 3GPP, TISPAN, INT, GSMA and IPIA on 1st week of May
ETSI members and to 3GPP OPs on May 15th and 27th
Participation from:
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To make an overall review of the Interconnection for NGN services
To understand requirements and potential of the interconnection model
To get expert feedback on the need to prepare standards to cover the interconnection of NGN
To know better each organization and what their expertise is on
To motivate finding together what needs to be done, how it is to be accomplished and which
organization should do it. First step to initiate the initiate the work
Invitations sent to:
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Address interconnection requirements elaborated in the GSMA
Discuss how they could be initially taken to standardization in 3GPP and TISPAN
Lay down basis for the cooperation required for the success of this project
Goal:
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Technical aspects of the creation of a standard for the interconnection for NGN services
Over 15 operator, 6 carriers, 12 manufacturers, and 6 government institutions
3GPP, GSMA, i3 Forum, IPI Alliance, TISPAN represented in the workshop and actively
contributing
15 contributions were provided by TISPAN, GSMA, i3, 3GPP, NTT Docomo, TE and TI
(http://portal.etsi.org/docbox/Workshop/2008/200806_NGN_INTERCONNECTION/ )
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Workshop
Emerging from the Discussion
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Importance of IP interconnection growing at all levels
– NGN operators, International Carriers, etc.
– Regulators
– Vendors
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Presentations from the various organizations provided snapshots of activities
GSMA IPX model presented as major piece of requirements
IPI Alliance and i3 Forum recently established may provide additional
requirements
3GPP Rel 8 to cover
– IMS to IMS NNI for direct interconnection
– CS to CS based on SIP-I
– More complex scenario’s including eg use of IPX service/network to be addressed in
rel 9
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Discussion on the need to look at interconnection of IMS to generic (basic) SIP
Roaming support presentation from NTT DoCoMo. More activity to be done as it
is expected to influence the evolution of interconnection
Presentation from TE and TI provided initial review of the gaps between the
GSMA business requirements/models and the standards
Interoperability testing (eg in ETSI INT) will have increasing importance once the
standards are finalized
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Workshop
Meeting output
• Leverage TISPAN experience in this area to cover NGN requirements,
not losing the expertise of this and other organizations
• Need to be aware of developments also in other organizations including
ITU and the regional SDOs partners of 3GPP and share ETSI findings
also in GSC
• It is proposed to develop a high level roadmap showing the programs of
each organization and the critical relationships over time. This should
possibly present the timescale relevant to the major requirements
• What is the next step? Focus down on a specific case, on a service level
NNI, which is critical to be put in place, to be standardized, and discuss
that in detail as a next step
• It was proposed to establish a mailing list to progress the discussion
• Do not lose the momentum, don’t stop ongoing activities while looking at
future improvement
• It was supported the importance of seeking a coherent and coordinated
set of standards with global value
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ETSI NGN Interconnection
•
•
•
•
•
Introduction
Rationale
Gap Analisys
Workshop NGN Interconnection
Work Ahead
18
Work Ahead
• Establish the foundations for interconnection of the new
generation of IMS services beyond frontiers
• Technical standard for NGN interconnection of services must
be timely available for NGN, coordinated with Common IMS,
and IMS services that will be standardize by 3GPP, TISPAN,
OMA and other organizations
• Next work requires to continue in the coordinated way
initiated in Workshop:
– Technical bodies will continue contribution driven from their
participants according with their normal procedures
– Synchronization through liaisons may have to be reinforce by mixed
working groups, follow up sessions or whatever may be decided
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Work Ahead
• Achieve global alignment with SDO:
– 3GPP OPs: Presentations and meetings, whenever required, to
explain the work and get their support
– GSC: Prepare a presentation and explanation of the new work
– Internet world: Identify and promote IMS and its Interconnection
• Alignment with international and national recommendations and
regulations
– ITU-T. A first analysis has shown that some of its recommendations
could be incompatible with ETSI and 3GPP specifications
– National regulators: prepare presentation, bring understanding and
create expectation, may be also advisable
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NGN Interconnection of Services
Strategic Activity for ETSI
Thank you
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