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SIP & SS7 (SIP-02) Monday - 09/10/07,  10:00-10:45am PowerPoint Presentation
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SIP & SS7 (SIP-02) Monday - 09/10/07,  10:00-10:45am. SIP-SS7 Interworking @ the Application Layer. Vince Lesch VP of Product Marketing. Agenda. Network Evolution Key Transitional Challenges Seamless Connectivity Service Deployment and Access SCIM IM-SSF NGN Control Layer

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sip ss7 interworking @ the application layer

SIP-SS7 Interworking @ the Application Layer

Vince Lesch

VP of Product Marketing

agenda
Agenda
  • Network Evolution
  • Key Transitional Challenges
  • Seamless Connectivity
  • Service Deployment and Access
    • SCIM
    • IM-SSF
  • NGN Control Layer
  • The Build Out Steps
  • Summary
network evolution growing the ngn

PBX

VoIP

End-Point

SIP

PBX

IAD

VoIP

SIP

Services

Edge

Proxy

A/Abis

MG

RAN

SBC

A/Abis

MSC

Server

VoIP

MG

RAN

Edge

Proxy

SBC

VoIP

PSTN

Region

Network Evolution - Growing the NGN
  • Cost Reduction at the Core through VoIP
  • Expansion of VoIP to Enterprise & Residential
  • Introduction of services based on SIP application servers
  • VoIP Peering
  • R4 MSC servers introduction

PSTN

Region

PSTN

Region

key transitional challenges
Key Transitional Challenges
  • Technical Challenges
    • Mergers & acquisitions have resulted in operators supporting several versions and variants of the same product & protocol
    • Seamless service connectivity across hybrid networks
    • Legacy system connectivity to newer systems
    • Systems integration and multi-vendor interoperability
    • Stability of standards, vendor implementation of standards
  • Business Challenges
    • Investing in the future while supporting today’s users
    • Capping expenditures in the “pre-IMS” technology
    • Cost effectively running a hybrid network
    • Providing new services to subscribers on old & new networks
    • Making the business case for IMS work
seamless connectivity
Seamless Connectivity

TDM for access, IP at the core for transport

Interworking between ISUP and SIP for call completion. BICC (Q.1902) used in 3G R4 architectures is based on ISUP which simplifies interworking

IETF, ITU-T and 3GPP Standards for ISUP & SIP Interworking: RFC 3372/3398, Q.1912.5, 29.163

Media

Media

Gateway

Gateway

Media

Media

Gateway

Gateway

SIP

AS

Call

Call

BICC, SIP

Server

Server

SS7

SS7

ISUP

ISUP

ATM, IP

LE

LE

backbone

PSTN/

PSTN/

PSTN/

PSTN/

ISDN

ISDN

ISDN

ISDN

6

ims architecture for svc provisioning
IMS Architecture for Svc Provisioning

Source: TS 23.218 IP Multimedia (IM) session handling; IM call model;

Stage 2

service orchestration mediation
Service Orchestration & Mediation

IMS-to-IN (SIP-SS7)

Exposing legacy services into IMS domain (Ex. LNP in IMS domain)

IN-to-IMS (SS7-SIP)

Access to next generation applications (Ex. LHS & MHS)

IN-to-IN (SS7-SS7)

Mediates services implemented using different technologies (Ex. CAMEL Consolidation)

IMS-to-IMS (SIP-SIP)

SCIM functionality mediates SIP services in the IMS World (FMC, MM-IM & Presence)

Voice

AS

CNAM

AIN

1188

AIN

Virtual

SIP UA

Virtual

SSP

Virtual

SIP AS

Virtual

SCP

LNP

SSP

MSC

MGCF

MM-IM

Service Orchestration & Mediation

AIN

IN

VCC

Presence

CSCF

Function

STP

Function

SSP

MGCF

SCIM

Bridging IN/AIN & IMS Applications

8

service orchestration mediation9
Service Orchestration & Mediation

Subscriber

  • Service Orchestration (SCIM)
  • Interaction across multiple CAMEL and IMS Application Servers
  • Service Meditation (IM-SSF)
  • Mediate between CAMEL and SIP Service Clients/Server nodes
  • Mediate between SS7 variants
  • Variations
  • SS7 only
  • SIP only
  • SIP & SS7

Billing

Control

Vendor 1

MSC/SSP

PRBT

Virtual

SCP

VPN/LNP

Vendor 2

MSC/SSP

Interaction

New Network Services

Virtual

SIP

AS

Presence

SoftSwitch/

CSCF

Mediation

SIP App

Server

Expensive to add multiple protocols

Network AND market requirement to combine SCIM and IM-SSF functionality into one product

sip signaling router sip stp

SIP STP

SIP Signaling Router = SIP STP

PBX

VoIP

End-Point

SIP

PBX

IAD

SIP AS

(B2BUA)

VoIP

Edge

Proxy

A/Abis

MG

RAN

SBC

A/Abis

MSC

Server

VoIP

MG

RAN

Edge

Proxy

  • Cost Reduction at the Core through VoIP
  • Expansion of VoIP to Enterprise & Residential
  • Introduction of services based on SIP application servers
  • VoIP Peering
  • R4 MSC servers introduction

SBC

VoIP

PSTN

  • Scalable signaling infrastructure
current ngn implementation
Current NGN Implementation

SIP

AS

SIP

AS

MSC

Servers

IP

PBX

  • IP layer routers
  • IP routing protocols
  • IP QOS controls

SIP

End-Points

PSTN

GW

Softswitch

Multimedia Servers

Distributed policies and information

11

ngn 2 0 dedicated ssr session layer
NGN 2.0: Dedicated SSR Session Layer

SIP

AS

SIP

AS

MSC

Servers

IP

PBX

  • IP layer routers
  • IP routing protocols
  • IP QoS controls

Session Routing

Engine

Session Routing

Engine

SIP

End-Points

PSTN

GW

Session Setup

URI Routing

Service Orchestration

IOT Point

Softswitch

Multimedia Servers

12

the build out steps

SIP

AS

SIP

AS

Multimedia IM

SIP Media Server

IMS Media Server

STP

Sigtran

ISUP/INAP

S-CSCF

SSR

P-CSCF

I-CSCF

MGC/

MGCF

Softswitch

Transit

Softswitch

Softswitch

TDM

MSC

The Build Out Steps

IMS

Voice AS

CAMEL

INAP

Service Orchestration (SCIM) AND Mediation (IM-SSF)

SMSC

summary
Summary

Network evolution present operators with many challenges

Network – operating a hybrid network for many, many years

Services – consistency across networks and transparency to the customer

Business – proving in the business case (leverage what you’ve got)

Migrating at the signaling control layer … a logical choice

Service mediation (IM-SSF) & interaction (SCIM) across pre-IMS & IMS domains

SIP signaling & session control layer in the NGN brings benefits now

Unified Signaling Control Plane: SS7 STP = SIP STP = IMS CSCF

Transitional technologies will be key for the next 3 - ? years

Minimize investment in “pre-IMS” technologies

Service continuity across hybrid networks

Leverage existing investment in key IN/AIN applications (e.g., number portability) by making them available to both domains during transition to IMS

A good transitional strategy is essential to making the IMS business case work

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