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Introduction to IMS (IMS-01) IP Media Servers in IMS: MRF and MRFP Garland Sharratt

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

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Introduction to IMS (IMS-01) IP Media Servers in IMS: MRF and MRFP Garland Sharratt

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

  2. Services – Traditional Approach MSC (announcements) Mobility (Find Me) Services Node Prepaid/Recharge Service Node Speech Portal Service Node Conferencing Service Node Voicemail Service Node • 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 Conferencing Software SUN Card + DSP Cards + TDM Interface Cards Embedded in a Compact PCI Chassis Proprietary, Monolithic System with software and Media processing hardware OS2 Based PC NT Server+ ASR Software + PCI DSP +TDM Boards SUN Workstation with PCI DSP and TDM boards Proprietary Proprietary Proprietary Audio Bridge TDM and DSP Boards in VME Chassis Legacy TDM Network

  3. Services – Decomposed Approach Conferencing Software Messaging Software Class 5 Softswitch Software MobilitySoftware Speech PortalSoftware Prepaid/RechargeSoftware • 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 Common Infrastructure IP Media Server IP/MPLSBackbone Sessioncontrol Media Gateway Legacy TDM Networks

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

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

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

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

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

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