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IMS Workshop- Summary. James Rafferty August 10. 2006. Agenda. Recap Goals of IMS Key Elements of Architecture Applications Relevance for the Enterprise Best Practices Resources Your Takeaways Q & A. What is IMS….

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slide1

IMS Workshop- Summary

James Rafferty

August 10. 2006

agenda
Agenda
  • Recap
    • Goals of IMS
    • Key Elements of Architecture
    • Applications
    • Relevance for the Enterprise
    • Best Practices
  • Resources
  • Your Takeaways
  • Q & A
what is ims
What is IMS…
  • IP Multimedia Subsystem (IMS) is an architecture that enables wireline, wireless and cable operators to offer a new generation of rich multimedia services
    • Across both circuit switched and packet switched networking infrastructures
  • IMS defines a architecture of logical elements using SIP for call signaling between network elements
    • Provides a layered approach with defined service, control, and transport planes
ims simplified view

Application Server

Application Server

Application Server

SCIM

S-CSCF

HSS/HLR

I-CSCF

BGCF

P-CSCF

MGCF

MRFP

MGW

IMS – Simplified View

Key Elements:

  • AS – Application Server
  • SCIM - Service Capability Interaction Manager
  • MRFC - Multimedia Resource Function Controller
  • MRFP - Multimedia Resource Function Processor
  • MRF – Media Resource Function
  • CSCF- Call Session Control Function
  • BGCF - Breakout Gateway Control Function
  • MGCF - Media Gateway Control Function
  • MGW - Media Gateway
  • HSS - Home Subscription Server
  • HLR - Home Location Register

SIP

MRFC

CSCF

RTP

MRF

other key ims concepts
Other Key IMS Concepts
  • Multiple Plane Architecture
    • Makes use of separate planes:
      • Application, Transport and Session Control
  • Common Security and Login functions
    • Makes use of Diameter protocol and HSS (Home Subscriber Server) to validate users
  • Applications and Services are independent of Access Method
    • Enables support for 3G mobile, WiFi, DSL, etc.
ims benefits

Hosted

Services

Voice

Text

Win Media

Video

MP3

Data

IMS Benefits
  • Converged Applications
  • Across Networks
  • Reduced development costs and time
  • Voice, Video and data services
  • Write once / use many

Applications

Web Content

  • Shared Resources
  • Media server resources
  • Common user data
  • Single user profile across applications
  • Integrated applications

Control

SIP

Transport

  • Session Control
  • Common Session Control (SIP)
  • Provides common service policies
  • Leverages investments across multiple
  • applications

Access

DSL

PSTN

  • Access Network Agnostic
  • Eliminates multiple service solutions
  • Network transparency
  • Consistent services across networks

Mobile

CMTS

why ims
Why IMS?
  • Need a better environment for creating and deploying high value multimedia services
      • Transform business models from voice-driven to service-driven businesses
      • Fixed-Mobile Convergence on a common IP application and service delivery architecture
  • Grow and protect subscriber base, increase ARPU (Average Revenue Per User)
      • Deliver a differentiated portfolio of value-added services
      • Provide more subscriber focused offerings
  • Controlling CAPEX and OPEX
      • Maturity and adoption of SIP and XML
      • Web model development model shortens the required investment of a programmer to develop new applications
      • Enables best-of-breed solutions with focus on new IP application services
  • Faster time to market with new services
      • Develop on standards-based technology
      • Reduce time to market for new applications with web development model
ims applications

Unified

Messaging

Announcements

Video Mail

VideoConferencing

SponsoredCalling

Pre-Paid

Voice Mail

Conferencing

Video Ringback

Gaming

IP MSC

Win Media

mp3

MGW

Text

CMTS

S-CSCF / SCIM

IMS Applications

SIPMSCML

3G

SIP

SIPVoiceXML

SIP

IMG

SIP Routing Cloud

2.5G

IMG

SIPSIP w/ VoiceXML

SIP w/ MSCML

SIP

Web Content

HTTP

PSTN

RTP

FTP

MPEG-4

MRF

NFS

Cable

IP

Phones

(MRFC/MRFP)

Network

Storage

other likely ims applications
Other Likely IMS Applications
  • FMC – Fixed Mobile Convergence
  • IP Centrex Hosting for Businesses
  • Audio and Video combined with other services
    • For example, conferencing, push-to-communicate, Multimedia over Broadband, Multimedia IM
  • Legacy Migration
    • Voice mail, conferencing, SMS, Prepaid Services
ims and the enterprise
IMS and the Enterprise

How will IMS affect the Enterprise?

  • IMS will be the preferred hosted services environment for carriers
  • Enterprises can borrow “best practices” from IMS for its own services
  • Service orientation of IMS echoes and complements Enterprise driven approaches such as SOA (Service Oriented Architecture)
ims best practices
IMS Best Practices
  • IMS includes “lessons learned” from many predecessor architectures
  • Best Practices include:
    • Separation of signaling from media
    • Separation of Applications from underlying sessions and transport
    • Services provided are independent of underlying transport
    • Common mechanisms for authenticating users and securing sessions
  • Review Call Center Example
local campus traditional
Local Campus (Traditional)

Agents on

IP Phones

Customer

Call Center Server

w/ Voip Gateway

Enterprise

LAN

H.323

T1/E1

PSTN

RTP

ISDN/CAS

Agent on

Soft Phone

Customer

  • All Agents in single location
  • Uses all-in-one system to handle all calls
  • Signaling and Media combined in one system
application of ims best practices contact center example
Application of IMS Best PracticesContact Center Example
  • Separate the application server apart from the Media
  • Use a separate Media Resource Function
    • Single MRF can support multiple applications
  • Use XML + markup languages for fast development and flexible, mid-call agent interactions
  • Use SIP as the protocol which ties the pieces together
case study distributed contact center
Case Study: Distributed Contact Center

Remote

Agent

Application Server

Agents on

IP Phones

Customer

Media GW

Enterprise

LAN

Signaling

Internet

Gateway

RTP

SIP/

VoiceXMLMSCML

PSTN

RTP

MRF

Web Customer

Email Customer

Agent on

Soft Phone

Customer

  • Improved Scalability: Separate Application from Media
  • Ability to add new media such as video as needs evolve
  • Fast development using SIP + XML
resources
Resources
  • IMS Forum – www.imsforum.org
  • 3GPP – www.3GPP.org
  • Internet Engineering Task Force – www.ietf.org
  • ETSI TISPAN - http://portal.etsi.org/portal_common/home.asp?tbkey1=TISPAN
workshop
Workshop
  • What our your “Takeaways” from this course?
  • Is there other material you would have liked to have been covered?
  • Any other comments