NGN INTERCONNECT WORKING GROUP4 April 2005

Update on the TSG Project Plan and Technical Work

Paul Griffin – Network Architect, Energis

Nick Ireland – Secretary TSG, BT

Peter Willis – Data Networks Architect, BT

The information in this presentation relates to plans currently under development and subject to consultation, and may be subject to change. Detailed implementation depends upon a number of factors including the capabilities of suppliers and the final 21CN network design.

Projects

TransportWG

Commercial(OPF?)

NICCJohn O'Riley

Ofcom

TSGSimon Sporton, Vodafone

ARS WG

Architecture

Requirements

Security

Access

Transport

Fabic Control

QoS WGApps WG

Signalling

Sig Transport

e2eQoS

B2BNancy Cox, Kingston ?

DSLDavid Davies, BT

NGNIan Spiers, Marconi

EmtelRay Forbes, Marconi

LocationJohn Medland, BT

Ian Spiers, Marconi Henry Taylor, BT Eric Rogers, BT Dave Mustill, BT

Enhanced MNPScott Bailey, 3

ManagementWG

Management

Peter Clarke, Ofcom

UK Standards Process Structure

TSG Project Plan (1)

# Task Pre-Req

Group/Work item

Dead-line

R / A / G

REQUIREMENTS

1 Scope requirements for the support ofPSTN/ISDN services over IP basedinterconnect

- ARSNICC74

EndFeb2005

2 Identify management requirementsimpacting on signalling for PSTN/ISDNservices.

- ARSNICC72

EndFeb2005

InitialRequirementsIncorporatedinto task 1

3 Scope requirements for Phase 2 - ARSNICC74

EndJuly2005

TSG Project Plan (2)

# Task Pre-Req

Group/Work item

Dead-line

R / A / G

ARCHITECTURE

4 Describe a signalling architecture for IPbased interconnect, identifying servicesassumed from lower layers;

1 ARSNICC74

MidMarch2005

5 Describe approaches to maintaining thenetwork resilience across an IP basedinterconnect.

4 ARSNICC74

MidMarch2005

6 Produce a draft design document for thetransport architecture to be incorporatedinto the NGN document set.

- ARSNICC74

EndMarch2005

TSG Project Plan (3)

# Task Pre-Req

Group/Work item

Dead-line

R / A / G

SECURITY

7 Establish a set of security requirementsfor NGN interconnect over an IP interconnect for PSTN/ISDN traffic.

- ARSNICC73

DueendMarch

InitialRequirementsincluded intask 1.Workongoing inETSI

8 Identify network protective controls(e.g. to protect against Mass Calls)(Subset of 7)

-

9 Identify method to prevent ApplicationFraud(Subset of 7)

-

TSG Project Plan (4)

# Task Pre-Req

Group/Work item

Dead-line

R / A / G

APPLICATIONS

10 Define and document theSpecification of the signallingrequired to establish,clear down, maintain and accuratelycharge for calls across an IP basedinterconnect, and subsequentlymaintain this specification (SIP-I)

ETSITISPAN711-15July1,2,4,6

AppNICC70

EndJuly2005

InitialRequirementsincluded intask 1.Work ongoingin ETSI

11 Identify the protocols needed tosupport signalling and whether theyare sufficient to allowimplementation. (SCTP/UDP)

4 AppNICC70

EndJuly2005

TSG Project Plan (5)

# Task Pre-Req

Group/Work item

Dead-line

R / A / G

APPLICATIONS

12 Identify any open issues in therequired standards and if required,determining solutions for input to theappropriate international standardsbody.

1,4,6,11 AppNICC70

EndJuly2005

13 If required, produce NICCspecifications and/or guidelines onthe transport and physical aspects ofIP interconnect.

1,4,6,11 AppNICC70

EndJuly2005

14 Draft Interconnect Test Specs 10 AppNICC70

EndAug2005

TSG Project Plan (6)

Ongoing,Ethernet OAMFrames

EndMarch2005

IPNICC71

15Identify any open issues in therequired standards and if required,determining solutions for input to theappropriate international standardsbody.

16

EoSDH defined.Additionalprotocolsidentifiedfrom task 6

EndMarch2005

IPNICC71

4,6Identify the protocols needed tosupport user and IP Transport planesand whether they are sufficient to allow implementation

15

IP TRANSPORT

R / A / GDead-line

Group/Work item

Pre-Req

Task#

TSG Project Plan (7)

MANAGEMENT

R / A / GDead-line

Group/Work item

Pre-Req

Task#

EndMarch2006

MGMTNICC72

10Develop a list of operationalprocedures for managing IPinterconnect for PSTN/ISDN traffic.

18

EndMarch2005

IPNICC71

15If required, produce NICCspecifications and/or guidelines onthe transport and physical aspects ofIP interconnect.

17

Key Issues

Technical areas

NICC Specifications based on existing international standards

Current Status

• Release 1 (PSTN/ISDN) Service requirements agreed

• Release 1 IP Interconnect Architecture defined (includes security, management, resilience aspects)

• IP Interconnect physical transport defined – Ethernet over SDH

• Release 1 IP IX Signalling to be SIP(I) – dependency on ETSI

Current key issues

• SCTP = PSTN/ISDN MTP equivalent

• Numbering, Addressing, Identifiers = tba

IP Addressing Issues

The address range 172.16.0.0/12 has been proposed (over 1 Million addresses)

The intention is that we do not mandate whether or not any CP uses NAT

•Signalling should be OK, i.e. 6 IP addresses per signalling “link” (/29)

•Unknown volumes of IP addresses will be required for media streams if NAT is not used.

Who will administer this address space?

•This will give visibility of the number and possibly location of interconnects that each operator has. Commercially sensitive

Who will define the rules?

•Should rules and best practices be the work of the standards bodies

Management PlaneControl Plane

NGN BNGN AiMn

TransportFunction

fB1fMn

ManagementFuncs fMn

ManagementFuncs

BW MangFunc

fC2

Signalling BorderFunc

fB2

Edge Session Control Func fC1

NGNBearerN/W(s)

Source Session Control Func

fC3

IP Session Border Func fB3

Other IP Service Border Func fB4

Control PlaneBearer Plane

ATM BorderFunc fB5

TDM BorderFunc fB6

Signalling BorderFunc

fB2

IP Session Border Func fB3

Other IP Service Border Func fB4

ATM BorderFunc fB5

TDM BorderFunc fB6

NGNBearerN/W(s)

iB1a

iB1b

iB1c

iB2a

iB2b

Edge Session Control Func fC1

Destinatn Session Control Func

fC4

BW MangFunc

fC2

iC1

iB3

GigE Physical

IP

SDH Physical

VCAT

ATM

AT

M B

ackh

aul S

ervi

ces

GFP

Ethernet VLAN

IPIPIP IP

VCAT

ATMGFP

Ethernet VLAN

IPIPIP

PS

TN

/ISD

N S

ervi

ces

Oth

er S

ervi

ces

on I

P

TD

M S

ervi

ces

PS

TN

/ISD

N S

ervi

ces

Oth

er S

ervi

ces

on I

P

AT

M B

ackh

aul S

ervi

ces

TD

M S

ervi

ces