1. Introduction to IMS (IMS-01) IP Media Servers in IMS: MRF and MRFP Garland Sharratt VP Partner Development & Chief Architect gsharratt@convedia.com Carrier Class IP Media Servers CMS-1000 Media Server CMS-6000 Media Server

2. Legacy TDM Network Services – Traditional Approach  Services typically tied to access network  Each new service required the provisioning of new hardware and software  Hardware and software was sold as a “service node” by one vendor, typically a proprietary solution deployed as a silo  Service node approach was necessary in 90's but in retrospect resulted in lots of infrastructure duplication and associated capex/opex cost Proprietary SUN Card + DSP Cards + TDM Interface Cards Embedded in a Compact PCI Chassis Proprietary, Monolithic System with software and Media processing hardware SUN Workstation with PCI DSP and TDM boards Proprietary Audio Bridge Conferencing Software NT Server + ASR Software + PCI DSP +TDM Boards OS2 Based PC TDM and DSP Boards in VME Chassis Conferencing Service Node Voicemail Service Node MSC (announcements) Mobility (Find Me) Services Node Prepaid/Recharge Service Node Speech Portal Service Node

3. Services – Decomposed Approach  Services are introduced and delivered through a software defined network  Service composed from best of breed software and media processing hardware  Open standards interfaces  Service logic executes on off- the-shelf servers  Media processing hardware is shared by many services Conferencing Software Messaging Software Class 5 Softswitch Software Mobility Software Prepaid/Recharge Software Speech Portal Software Media Gateway IP/MPLS Backbone IP Media Server Legacy TDM Networks Session control Common Infrastructure

4. Transport Layer - IP/MPLS (routing/switching) Traffic Processing Layer (inspect, process, adapt, convert,…) Media Gateway Session Border Controller Media Server Signaling Layer Basic voice services Enhanced multimedia services layer (mobile) Voice Softswitch Voicemail IP Centrex IP PBX Call Center Conferencing Collaboration Ringback Videomail Calling Card Push to Talk Speech Portal Hosted Services Network Gaming Application Server Layered Architecture for Services

5. Application Servers Legacy Wireless (PLMN, 2G/2.5G) IP Wireless (3G, WiFi, WiMax) Control Layer Transport & Endpoint Layer Legacy Wireline (PSTN) IP Wireline (DSL,Cable) Services Layer SCIM MGCF HSS AS RNC Call State Control Function Mp (SIP, NETANN, VoiceXML, MSML) Internet/ Intranet GGSN Mb (RTP) IP Multimedia Subsystem Mb (RTP) MGW MRFP Mb (RTP) SGSN Multimedia Resource Function Controller Media Gateway Media Gateway Control Function Home Subscriber Service Multimedia Resource Function Processor Mb (RTP) IMS Architecture - Media Processing CSCF MRFC Multimedia Resource Function

6. Service Building Blocks S-CSCF AS MRB MRF/ MRFP SIP SIP/ H.248 Multimedia Resource Function (Processor) SIP Application Server Media Resource Broker Service Specific Logic Service Management and Provisioning Call Signaling Service Databases Billing Interface Service Creation Audio Tones & Announcements Audio Tones & Announcements DTMF Detection & Generation DTMF Detection & Generation Audio Bridging & Mixing Audio Bridging & Mixing Audio Recording & Playback Audio Recording & Playback Speech Recognition Text to Speech Video Announcements Video Announcements Video Bridging & mixing Video Bridging & mixing Video Recording & Playback Video Recording & Playback Fax Detection & Processing Fax Detection & Processing Hot Word Spotting Hot Word Spotting Video Switching MRF selection/ virtualization SIP RTP Video Transcoding Video Transcoding Audio Transcoding Audio Transcoding Video Enhanced Processing Codecs

7. Media Processing Chain S-CSCF AS MRFC MRFP SIP SIP UA Protocol conversion (Call Detail Records) Media processing H.248 MRB MRF selection/virtualization SIP Service logic, signaling MRF

8. Media Server Control Protocols S-CSCF/ "Softswitch" AS MRFC MRFP SIP SIP UA Protocol conversion (Call Detail Records) Media processing H.248 MRB MRF selection/virtualization Service logic, signaling SIP Simple processing, e.g., PSTN Emulation "Mobile softswitch" use SIP + Netann + XML (e.g., MSML/MOML ) MRF Complex processing, e.g., enhanced services Application server use "Mobile softswitch" use

9. Summary  IMS is decomposed into functional components,  IP media server is a key reusable IMS component  Media servers offer building blocks  Two media server control options  MRFP -- H.248 interface Simple processing  MRF -- SIP interface Enhanced processing