Report on ETSI NGN Interconnection of Services

Strategic Topic

DOCUMENT #: GSC13-GTSC6-02r1

FOR: Presentation

SOURCE: ETSI Board

AGENDA ITEM: 4.1

CONTACT(S): fernando@soriano.mobi

claudio.gentile@telecomitalia.it

david.boswarthick@etsi.org

Submission Date:June 27, 2008

Fernando SorianoClaudio Gentile

ETSI Board Members

Presenter: Mike Sharpe

2

INDEX

• Introduction

• Rationale

• Gap Analysis

• Workshop NGN Interconnection

• Work Ahead

3

ETSI NGN Interconnection

• Introduction

• Rationale

• Gap Analysis

• Workshop NGN Interconnection

• Work Ahead

4

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

5

ETSI NGN Interconnection

• Introduction

• Rationale

• Gap Analysis

• 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• Interconnection of NGN affects to a multiple players and organizations,

and differences in their approaches may lead to duplication and divergence

• Out of Scope: Commercial relation itself across the chain of IMS

7

ETSI NGN Interconnection

• Introduction

• Rationale

• Gap Analysis

• Workshop NGN Interconnection

• Work Ahead

8

GAP Analysis

• How identified requirements (business oriented) fit with current standardization work on interconnection?

• Are well covered all aspects?• Are there overlapping among the work in technical organizations?• Initial study done by TE and TI

– Taking as reference the IPX model developed in the GSMA– And the work under progress in 3GPP and ETSI TISPAN– Analyzing aspects related to:

• Architectural models, network interfaces,…• QoS values defined across the IP chain (access, carrier, peering point, codecs,..), including

KPI measurement, • Security: Define and manage different security levels and profiles• Consideration the intermediate figure of the carrier/hub • CDR specification and production within the technical infrastructure for settlements among

participants• Testing to certify interconnection.• Etc.

• Shows that technical work may need to be reviewed, prioritized and better synchronized.

9

GAP Analysis: Requirements

GSMA IPX Requirements

3GPP Rel-8 3GPP Rel-9

Inter-Service Provider IP Backbone Requirements•Addressing and routing•QoS, Authentication and Authorization, Accounting•Service Awareness

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

Security:•Public Internet, Integrity.•Tunnelling, Traffic splitting (UE/SERVER)

Requirements not defined in SA1. Network domain security is defined by SA3 (TS 33.210)

Should be defined in Rel9

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.

9

10

GAP Analysis: Architectures

GSMA 3GPP TISPANDirect 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 I-WLAN 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 support.

Border Nodes: IBCF + RACS + IBGF highly defined.

Gq’ interface: QoS/NAT/Firewall control.

No support for GRE tunnels.

Interconnection Interfaces (NNI): Radius, MMS, IMS…

IMS-NNI (Ici/Izi) under specification SIP-I NNI only starting.

NNI Definition ongoing (TR only): either IMS, SIP-I or BICC/IP

11

ETSI NGN Interconnection

• Introduction

• Rationale

• Gap Analysis

• Workshop NGN Interconnection

• Work Ahead

12

Workshop NGN InterconnectionJune 9th 2008

• Scope: – Technical aspects of the creation of a standard for the interconnection for NGN services

• Aim: – 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: – 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:– 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:– 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/ )

13

WorkshopEmerging from the Discussion

• Importance of IP interconnection growing at all levels– NGN operators, International Carriers, etc.– Regulators– Vendors

• 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• 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

14

WorkshopMeeting 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

15

ETSI NGN Interconnection

• Introduction

• Rationale

• Gap Analysis

• Workshop NGN Interconnection

• Work Ahead

1616

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, SDOs, 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

17

NGN Interconnection of ServicesStrategic Activity for ETSI

Thank you