IMS – The future of Fixed Mobile Convergence

EduCause

Walt Magnussen Ph.D.

12 October, 2010

Current Situation

• Landline– Fixed device (with the exception of nomadic VoIP devices– Dedicated telephone number– Voice Mail often with Unified messaging– Usually not location aware

• Cellular Phone– Mobile device– Dedicated telephone number– Voice Mail without Unified messaging– Location aware

Early attempts at FMC

• PBX control – trombone trunked

• SS7 gateways (Tango networks)

• Carrier provided

Cellular networks working through the generations

• 1G – Analog Voice only• 2G – GSM, CDMA, up to 20 Kbps Voice and

Data• 2.5G CDMA2000, EDGE, GPRS up to 384

Kbps. Web browsing, MMDS, location services• 3.0G CDMA 2000 and 3000, UMTS up to 3.1

Mbps. Full motion video, streamed video, 3D gaming

4G networking

WiMax – Sprint Limited markets now

LTE – AT&Tand Verizon Wireless begin 2010

Bandwidth 100+ Mpbs

Applications - All of the above Plus:High quality video streaming

High quality video conferencing

High quality Voice Over IP

4G is built upon IMS architecture

IP Multimedia Subsystem

• Developed by 3GPPP

• Uses SIP signaling

• FMC is based upon concept of Home and Visiting networks

IMS Advantages

• Application Integration

• QoS

• Authentication sharing

IMS Architecture

IMS Nodes

• SIP Proxies– S-CSCF – Network Controlling Proxy– P-CSCF – Border SIP Proxy– I-CSCF - Interrogating SIP Proxy

• Location nodes– HSS Function of HLR and VLR– SLF – Maps current IP address to

User/Application.

IMS nodes continued

• Gateway nodes– BGCF – Border Gateway Control Function– MGCF – Media Gateway Control Function– MGW – Media Gateway– SGW – Signaling Gateway

• Media Control– MRFC – Media Control– MRFP – Media Proxy

IMS nodes continued

• Application Servers (can either be home or visiting network– SIP AS– OSA-CSC– IM-SSF

Examples of Applications

• Carrier– GPS Directions– On line games– Video on Demand

• University– Blackboard access– Emergency Notification– Library and other controlled access systems– VoIP over campus WiFi

Integration of Systems

• Campus Presence Server with HSS

• Campus VoIP Proxy with Wireless network– One number dialing– Integration of Voice Mail Systems

• Direct campus access to billing systems

• Negotiating QoS

Preparing your campus for IMS

• Consider DAS system (if appropriate)

• Student/Faculty discount programs with carriers

• Understand the architecture and ready applications for access

The future of Emergency Communications

• FCC Initiatives– CSRIC - Traffic Prioritization, CAP and other working

groups– ERIC – Public private integration of 700 MhZ LTE

services

• ESI Net initiatives-– It’s more than 911– Campuses will connect– It will probably be IPV6 only

TAMU ITEC Projects

• NSF GOALI solicitation

• Proposing IU-CRC March of 2011

• Network project with Verizon Wireless

• Hope to start in June of 2010

• Stay tuned for more information

Contact info and Questions?

Telecom@tamu.edu979-845-5588