IP Multimedia Subsystem (IMS)

Transcription

1 O IP Multimedia Subsystem (IMS) 1 Next Generation Services Architecture Based on IMS Web Portal Element Management System Application Layer Parlay App Parlay GW Applications SIP App Support Systems Operations, Maintenance, Fault Correlation, Billing Mediation, Session Control Layer S-CSCF Session and Resource Control Service Control I-CSCF P-CSCF PDF BGCF MRFC Support Systems HSS Centralized Databases AAA, Profiles, Media and End Point Layer O SIP Media Server Access Network Session Border Controller PSTN and Legacy Gateway IP Signalling Converter MGC Media Gateway MGCF PSTN IN Access SG SS7 SIP LAG SIP Endpoints Legacy IP Endpoints H.323 and MGCP H.323 PBX SIP TAG TDM PBX Analog Endpoint 2 1

2 IMS Entity Definitions Signaling Entities HSS - Home Subscriber Server or HSS Collective CSCF - Call Session Control Function 3 flavors BGCF - Breakout Gateway Control Function MGCF - Media Gateway Control Function MRFC - Multimedia Resource Function Controller PDF - Policy Decision Function AS - Application Servers provides services and applications Bearer Entities MGW - Media Gateway MRFP - Multimedia Resource Function Processor 3 Layering of IMS Solution Vertically Integrated Architecture IMS Architecture USER DATA Web Portal IM VoIP VoD Common Resources Sharing of common data Single user profile Single Sign on Integrated Web portal experience APPLICATION Simplified Converged Apps Common applications across Networks Independent applications Reduced interaction development costs Integrated voice and data services Underlying network hiding SESSION Session Control Walled access to applications Prevents bit pipe hijacking Hides endpoint idiosyncrasies from apps Provides service interaction policies Leverage investments across many applications and market segments ENDPOINTS Access Agnostic Eliminates multiple service solutions Supports global roaming Consistent services / home network 4 2

3 Session and Resource Control Elements Service Control Trusted Application Servers SIP Session and Resource Control Session Control Provides walled access to applications Application interaction control Centralized network routing Simplifies application development Hides endpoint idiosyncrasies from apps MRFC S-CSCF I-CSCF P-CSCF PDF BGCF Trusted Gateway Centralized Media Resource Control Provides efficient scalable infrastructure Leverage investments across many applications and market segments HSS Media Server Access Network Session Border Controller Centralized Databases AAA, Profiles, Centralized AAA and subscriber profiles 5 Home Subscriber Server (HSS) or HSS Collective HSS is the master database in the IMS architecture Logically it can be viewed as one entity Physically can be made up of several physical databases HSS Centralized Databases AAA, Profiles, AAA Server Provides IP based Authentication, Authorization, and Accounting functions Typical Databases Subscriber Profiles Subscriber specific information that is used for service and feature authorization. Dynamic Subscriber Information Current session registration data (i.e.: S-CSCF Address, access network) Network Policy Rules Subscription resource usage, QoS, valid times and routes, geographical service area definitions, policy rules for the applications serving a user, etc. Equipment Identity Register (EIR) Information such as records of stolen equipment Centralized sharing of common data 6 3

4 Call Session Control Function (CSCF) SIP Proxies used to manage SIP sessions Coordinates with other network elements Session control, feature control, resource allocation, Session and Resource Control S-CSCF I-CSCF Three flavors of CSCFs Serving CSCF (S-CSCF) - Session control entity for endpoint devices Interrogating CSCF (I-CSCF) - Entry point to IMS from other networks Proxy CSCF (P-CSCF) - Entry point to IMS for devices P-CSCF PDF Functionally CSCFs follows Internet paradigms P-CSCF I-CSCF S-CSCF Stateless entities at network edge, stateful entities in core Simple processing at edge, complex processing in core Security and authentication requirements increase towards core Walled Garden control of sessions 7 Multimedia Resources Multimedia Resource Function Controller (MRFC) Controls media resources in MRFP via H.248 Requests received from IMS elements Generates CDRs Multimedia Resource Function Processor (MRFP) Mixes incoming media streams (e.g. for multiple parties) Sources media streams (for multimedia announcements) Processes media streams (e.g. transcoding) Tones and announcements IMS App IMS App S-CSCF Access Network IMS App MRFC MRFP MRFP MRFP User Equipment (UE) Central management of a pool of media resource servers 8 4

5 Simplified IMS IPTV Functional Architecture NASS: Network Attachment Subsystems RACS: Radio Admission and Control Subsystem 9 IMS-based Network Architecture 10 5

6 Discovery and Selection of IPTV Service and Establishment of an IPTV Session 11 SIP Registration 12 6

7 Basic Session Set-up and Termination using SIP 13 Session Set-up with Successful QoS negotiation 14 7

8 Session Set-up with Unsuccessful QoS negotiation 15 Example Prototype Implementation of QoS using IMS Network Elements 16 8

9 IMS Subscriber to IMS Subscriber: Putting it All Together 1 2 Initiate SIP Invitation Retrieve Subscriber Profile (if needed) 3 Apply Service Logic 4 5 Retrieve Address of CLD Party Home Network and Forward INVITE. Identify Registrar of CLD Party and Forward INVITE. 6 Retrieve Subscriber Profile (if needed) 7 Apply Service Logic 8 Forward INVITE to CLD Party 9 SDP Negotiation / Resource Reservation Control 10 Ringing / Alerting 11 Answer / Connect Control Calling Party Home Network HSS DNS HSS Called Party Home Network Bearer AS 2 Diameter 3 SIP S-CSCF 4 Diameter I-CSCF 5 6 Diameter 7 S-CSCF SIP AS SIP 8 SIP Calling Party Visited Network P-CSCF P-CSCF Called Party Visited Network Access Backbone Packet Network RTP Stream Backbone Packet Network Access 9 17 Summary of IMS True converged Wireline/Wireless architecture Access agnostic with roaming between domains Home control allows service differentiation and promotes roaming Investment protection Walled session control avoids becoming a bit pipe Managed network provides product and service differentiation Highly adaptable bandwidth management and security Guaranteed and adjustable QoS to meet individual customers needs Common multi-market segment applications and databases Same applications & customer data available regardless of access method Fosters and promotes the introduction of new services Common IMS network for voice and data allows for integrated multimedia services Allows the integration of disparate applications by carrier instead of supplier 18 9

10 Outline of the Presentation Industry Trends Convergence Video over Internet Multicast Technology Trends Challenges Challenges for Video-over-Internet Service Provider (Open Net) Challenges for Telecom Service Provider (Closed Net) Opportunities Novel Media Delivery Networks Targeted Advertisements Conclusion 19 Opportunities: Novel Media Delivery Networks 10

11 Video to TV is tightly controlled by Cable and Satellite Operator Cable/TV Network Cable/TV STB is not directly connected to Cable Modem Cable/TV Set Top Box (STB) is tightly controlled by Cable Operators Cable STBs are proprietary platforms Scientific Atlanta (now Cisco) & General Instruments (now Motorola) No linux versions! STB is NOT directly connected to Internet for there is NO interface between STB and the Cable Modem Movies cannot be downloaded into the STB without the help of Cable Operators Can you bypass the Cable/Satellite Operators? 21 MovieBeam: Download Movies/Videos using wireless connection to MovieBeam Player which plays directly on TV MovieBeam Player MovieBeam is a brilliant new way to rent and watch movies at home. Movies delivered directly to TV -- no cable, satellite, or computer is needed! Movies are beamed wirelessly into the MovieBeam Player at home. Amazing HD quality! Acquired by Movie Highway!! 22 11

12 In-Network Video Transcoding and Caching Video delivery system with caching and scaling features In-network services to support multiple platforms and varying network capacity Caching of content closer to end-user based on preferences Video Transcoding & Caching Service Fiber/DSL Access Network INTERNET Transcoding Wireless Gateway Sun Microsystem s Agnostic Media GridCoder Cellular Access Network A multi-format software-based transcoding solution Turnkey solutions for content encoding and application development to deliver compelling TV and media user experiences on Java- enabled handsets. 23 Agnostic Media Frameworks and No Click Transcoding Supports format conversions for audio, video, images, document formats all industry-standard video and audio encoding formats (Windows Media, Real, MPEG-1, MPEG-2, MPEG-4, AAC, APE, Flac, etc.) transcoding of high-definition video content Provides full image processing and format conversion capabilities ability to dynamically support new transcoding technologies with minimal change to existing applications Integrates with software and hardware-assisted transcoding solutions custom software or hardware-assisted transcoding technologies GridCoder brings High Performance Computing architecture to broadcast and media world utilizes InfiniBand to move over 30 Gbps at 17ms latency resulting in massive throughout improvements 4-30 x Real-Time speed! Modular frameworks: Asset Management Framework Media Processing Framework Rights Management Framework Application Framework 24 12

13 Outline of the Presentation Industry Trends Convergence Video over Internet Multicast Technology Trends Challenges Challenges for Video-over-Internet Service Provider (Open Net) Challenges for Telecom Service Provider (Closed Net) Opportunities Novel media delivery networks Targeted Advertisements Conclusion 25 Opportunities: Targeted Advertisements 13

14 From Transforming Television Advertisements To Passive (viewer can only see an ad) Interactive (viewer can interact with an ad) Maui Golf Vacation 8-10 Maui Golf Vacation < 3 Save Share Browse Interest Buy Push-based (pushed by advertiser) Pull-based (pulled by viewer) Hawaii Vacation Package Ford Escape 2005 Uniform (same ad seen by all viewers) Tundra Ford Save Vacation Escape Share Entertainment 2005Browse Interest Real Estate Buy Targeted (different ads seen by viewers) Tundra Sienna FJ Cruiser Business Owner Soccer Mom Young Adult 27 Outline of the Presentation Industry Trends Convergence Video over Internet Multicast Technology Trends Challenges Challenges for Video-over-Internet Service Provider (Open Net) Challenges for Telecom Service Provider (Closed Net) Opportunities Novel media delivery networks Targeted Advertisements Conclusion 28 14

15 Conclusion Trends in Digital Media Industry Convergence of Networks and Services Internet TV and IPTV are both Hot! Multicast is Hot thanks to Mobile TV and IPTV Technology Trends that are making video delivery over the Internet economically feasible: GB memories at significantly lower price points Faster CPU s Residential Broadband networks providing large bandwidth at low monthly rates Broadband Wireless access Improved Compression Technology Challenges in Digital Media Delivery Challenges for Video-over-Internet Service Providers (Open Network) Limited Video Delivery over the Internet (Content Source: existing TV/studios; limited # of channels) Unlimited Video Delivery over the Internet (Content Source: anyone; potentially millions of channels) Challenges for Telcom Service Providers (Closed Network) Set up high-throughput low-cost multicast trees in hybrid wired-wireless networks Single Converged Network infra-structure for Quadruple Play (Video, Voice, Data, Cellular) Deliver exactly the same video/tv channel to multiple devices in different networks Opportunities in Digital Media Delivery Novel Delivery Networks (MovieBeam) In-network Trans-coding and Caching (Agnostic Media, Rhozet, AnyStream, Envivio, Thomson) Targeted Advertisements (RelevantAd, Navic, Invidi, Visible World) Digital Media Industry is at the Crossroads Cable and Satellite are NOT the only television/video service providers Telco: IPTV & New Generation TV/Video Service Provider: Video over Internet Opportunities abound: imagination is the only limitation 29 Thank you!!! Questions?? 15