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IP Solution Architectures for Deploying Video Services
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IP Solution Architectures for Deploying Video Services


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  • Most services need media processing Exceptions: point-to-point calls, data services (web, SMS, presence, etc.)
  • Transcript

    • 1.
      • IP Solution Architectures for Deploying Video Services (SP-08)
      • IP Media Servers for Multimedia
      • Garland Sharratt
      • VP Partner Development & Chief Architect
      • [email_address]
      Carrier Class IP Media Servers CMS-1000 Media Server CMS-6000 Media Server
    • 2. Agenda
      • Presentation – 35 minutes
      • Why use media servers
        • Multimedia services
        • Media processing
      • Architectures
        • Why decompose / layer
        • NGN architecture
        • H3323 MCU / non-decomposed
        • IMS architecture
        • Service building blocks
      • Building Blocks
        • Play/Record & Transcoding
        • Conf. - Continuous Presence
        • Conf. - Voice Activated Switch'g
        • 3G-324M - two models
      • Video service delivery platform
        • Multimedia file gateway
      • Controlling media servers
        • IMS media processing chain
        • Control protocols
        • SIP compared to H.248
      • Example call flow
        • Using a MS for enhanced video conferencing
      • Q&A – 10 minutes
    • 3. Multimedia Services x Media Processing
      • Multimedia Services
      • Video announcements for greetings, branding, advertisements, ...
      • Video information portal
      • Video auto-attendant
      • Video call center
      • Video messaging, videomail
      • Video ringback tones
      • Video conferencing
      • Video network gaming
      • Multimedia Building Blocks
      • Play
      • Record
      • DTMF
      • Conferencing – Switching
      • Conferencing – Mixing
      • Titles, Borders, Cropping, ...
      • (Transcoding, Rate matching)
    • 4. 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
      Legacy TDM Network Proprietary Proprietary SUN Card + DSP Cards + TDM Interface Cards Embedded in a Compact PCI Chassis Proprietary, Monolithic System with software and Media processing hardware, e.g., MCU 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 Video Conferencing Mobility (Find Me) Services Node Prepaid/Recharge Service Node Speech Portal Service Node
    • 5. 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
    • 6. Layered Architecture for Services 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
    • 7. NGN Generic Architecture IP Phone PDA/3G Phone PC Media Server Media Gateway "Softswitch" Application Servers Cell Phone PSTN Access IP Service Core IP Access TDM RTP RTP SS7 SIP, H.323 MGCP, MEGACO SIP/VoiceXML, MSML/MOML MGCP, MEGACO SIP, H.323, MGCP, MEGACO Phone Speech Server MRCP Content Storage HTTP, NFS Peer Network Session Border Controller RTP RTP
    • 8. Non-Decomposed Architecture IP Phone PDA/3G Phone PC H.323 MCU Media Gateway "Softswitch"/ Gatekeeper Cell Phone PSTN Access IP Service Core IP Access TDM RTP RTP SS7 H.323 MGCP, MEGACO H.323 Phone Peer Network Session Border Controller RTP RTP
    • 9. IMS Architecture 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 HSS AS AS AS Call State Control Function Internet/ Intranet IP Multimedia Subsystem Multimedia Resource Function Controller Media Gateway Media Gateway Control Function Home Subscriber Service Multimedia Resource Function Processor Multimedia Resource Function MGCF RNC Mp (SIP, NETANN, VoiceXML, MSML) GGSN Mb (RTP) Mb (RTP) MGW MRFP Mb (RTP) SGSN Mb (RTP) CSCF MRFC
    • 10. Service Building Blocks S-CSCF AS MRB MRF/ MRFP SIP 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 DTMF Detection & Generation Audio Bridging & Mixing Audio Recording & Playback Speech Recognition Text to Speech Video Announcements Video Bridging & mixing Video Recording & Playback Fax Detection & Processing Hot Word Spotting Video Switching Video Transcoding Audio Transcoding MRF selection/ virtualization SIP RTP Video Enhanced Processing A&V Codecs
    • 11. Play/Record & Transcoding Audio: AAC Video: MPEG4 Audio: G.711 Video: H.263 Media Server Audio: AAC Video: MPEG4 Audio: G.711 Video: H.263 Media Server Content Storage RTP RTP RTP NFS/HTTP Play / Record Transcoding
    • 12. Conferencing - Continuous Presence
      • Supports participants with
      • Different codecs (transcoding)
      • Different bit rates, frame rates, screen sizes (rate matching)
    • 13. Conferencing - Voice Activated Switching Everyone sees current speaker. Option: current speaker sees previous speaker RTP RTP RTP RTP Current speaker Previous speaker Application Server Codec, rate, fps, bit rate must match Terminals must support I-Frame requests
    • 14. 3G-324M in Gateway IP/IMS PLMN Mobile phone with 324M Convedia Media Server Application Server SIP / 324M Gateway PRI/BRI/ISUP SIP RTP SIP (signaling) SIP (control) RTP SIP Example: Dilithium Networks DTG 2000 324M processing Regular RTP processing
    • 15. 3G-324M in Media Server IP/IMS PLMN Mobile phone with 324M Convedia Media Server Application Server Any Gateway PRI/BRI/ISUP SIP SIP (signaling) SIP (control) 64k SIP Example: Dilithium Networks DTG 2000 Transparent pass-through 324M processing
    • 16. Video Service Delivery Platform Application Server Media Server Multimedia File Gateway Media Gateway IP terminal CS terminal Terminal SIP / H.248 RTP RTP File File File File TDM Multimedia content sources File server (video/audio file storage) e.g., web server for PC access to files, or MMS gateway for mobile phone access to files SIP Wireline or wireless Wireline or wireless Wireline or wireless File
    • 17. Media Processing Chain S-CSCF AS MRFC MRFP SIP SIP SIP SIP UA Protocol conversion (Call Detail Records) Media processing H.248 MRB MRF selection/virtualization SIP Service logic, signaling MRF RTP SIP
    • 18. Media Server Control Protocols S-CSCF/ "Softswitch" AS MRFC MRFP SIP SIP 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
    • 19. SIP or H.248 for Media Server Control
      • SIP > H.248
      • Application servers already have SIP stack for signaling, have no use for H.248
      • Powerful SIP service creation capabilities: VoiceXML, proxies, routing, security, etc.
      • SIP skills and tools more widespread than H.248 skills and tools
      • Many service providers want to simplify networks, reduce number of protocols
      • SIP is only common protocol for MS control between all NGN architectures
      • H.248 > SIP
      • Currently ahead in standardization due to reusing MG specification work
      Application Server(s) IP Network RTP Signaling IP Media Server SIP or H.248???
    • 20. Call Flow Example: Enhanced Video Conf.
    • 21. Summary
      • Multimedia services need media processing
      • IMS is decomposed into functional components
      • 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
      • Media server > H.323 MCU