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IMS-in-a-box

IMS-in-a-box. or How to compete with the Internet players. Who am I?. My name is Adrian Georgescu Founder and CEO of AG Projects Our focus is the delivery of SIP infrastructure We specialize in serving companies like cable operators and Internet service providers

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IMS-in-a-box

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  1. IMS-in-a-box or How to compete with the Internet players Maastricht 2007

  2. Who am I? • My name is Adrian Georgescu • Founder and CEO of AG Projects • Our focus is the delivery of SIP infrastructure • We specialize in serving companies like cable operators and Internet service providers • We provide simple solutions for their complex problems Maastricht 2007

  3. Short history of PSTN • PSTN is a centralized network where various elements are chained to provide a voice service • The service follow a “create and manage bottleneck” architecture • The need for cost effective growth and the possibility of introducing services brought NGN in the picture Maastricht 2007

  4. Introduction to Next Generation Network • NGN is a model proposed by ITU-T that aims to implement a a model similar to PSTN by using Internet protocols • network is application aware • control resides in the network • QoS is a matter of central control Maastricht 2007

  5. ITU-T NGN System Architecture Maastricht 2007

  6. Motivation for IP communications • Lower the operational expenditure by converging the data and voice networks into one single network (cost reduction) • Increase revenues by introducing new services beyond traditional voice services (generate revenues) Maastricht 2007

  7. IMS, the NGN solution for mobile networks • IMS initially developed by 3GPP to replace the mobile networks • Based on an operator controlled, walled-garden Internet • Based on the SIP protocol developed within IETF • Internet protocols have been chosen for their efficiency while trying to maintain a closed network Maastricht 2007

  8. 3GPP IMS Architecture – all subsystems Maastricht 2007

  9. IMS, the NGN solution for fixed networks • IMS was designed to implement an all-IP telecommunications environment for the fixed line operators too • IMS supported by ETSI (TISPAN) with its extensions for the fixed line networks (DSL/cable) • Based again on an operator controlled, walled-garden Internet Maastricht 2007

  10. ETSI TISPAN IMS Architecture Rf /Ro Ut Rf /Ro Charging Ut Application Servers Functions Sh Rf /Ro ISC Dh UPSF Iw SLF Cx IWF Dx Ib P3 IMS / PSTN Simulation PSTN Emulation (R2) Mw Mw/Mk/Mm IBCF Ic I/S - CSCF Mk Mi AGCF P2 Mk BGCF Mw Mr Mj Gq ' Mg e2 SGF P - CSCF MGCF MRFC Ie Other IP Networks P1 Gq ' Gq ' Network Gm SPDF PSTN/ISDN SPDF Attachment Resource & Admission Control Resource & Admission Control Mp Mn Subsystem A-RACF e4 MG Re Ia MRFP T - MGF I - BGF UE Maastricht 2007 BGF RCEF IP Transport (Access and Core) CNG -

  11. IMS is clogged with technical problems • Follows a classic telephony design with chained components, enforcing resource scarcity • End-to-end communication not possible between end-points • Innovation possible and allowed only in the network core • Complexity. 12 components with at least 22 interfaces. Maastricht 2007

  12. Why is IMS so complex? • decomposing devices into most granular functions and links • tracking and controlling user behavior • The proliferation of boxes and protocols for the state management required for data tracking leads to cognitive overload but adds little value. • Complexity is ugly Maastricht 2007

  13. IMS costs are prohibitive • Cost of deployment • Cost of maintenance, many components, boxes, links • Development costs, services deployed only from the core • It will deliver for a huge cost less than your consumers got from Skype yesterday Maastricht 2007

  14. Do we still need walled gardens? • Telecom industry is definitely not known for its innovations • Raising barriers cost money and returns nothing back • All innovation is done outside on the Internet • By the time you finish raising up your walled garden, the customers are safely outside Maastricht 2007

  15. Internet is simple and simple is beautiful • Internet is a simple network • Internet services (called applications) are performed at the edge • More CPU power on the edge, more applications available • Increase of bandwidth eliminates the source of QoS problems • It is based on the end-to-end principle Maastricht 2007

  16. the end-to-end principle of the Internet • Network is unaware of the applications, this makes it scalable • Nothing should be done in the network that can be done in an end-system • Quality of Service (QoS) is a matter of bandwidth availability and not of central control Maastricht 2007

  17. Why do Internet business models flourish? • Services are available on the edge, spread virally • Internet is an “eat all you can” model with easy to bill flat-fee models • New applications are rolled out faster then ever • Free services attract naturally large amount of users to premium services Maastricht 2007

  18. Real-time communications over the Internet • SIP - Signalling protocol to setup and close sessions • ENUM - Translate telephone numbers into SIP addresses • Presence - enable applications beyond voice • P2P - scalability and operational cost reduction Maastricht 2007

  19. P2P - the most successful Internet application • Widely known for file-sharing and IM applications • P2P today accounts for more than 70% of the Internet traffic • What P2P does, it creates an overlay network for a set of specific applications • P2P provides actually a suite of technologies that solves today the problems of IMS Maastricht 2007

  20. What is so special about P2P technology? • Join/Leave: Nodes may come and go at any time, the network topology reconfigures itself • Lookup: The network can locate deterministically the node that serves a specific user or service • Routing: The network can route a message regardless of network topology changes and without manual re-configuration Maastricht 2007

  21. How can P2P solve the problems of IMS? • Self-organizing network (automatic disaster recovery) • Scalability limited by hardware • Cheap hardware resources in place of expensive servers • No idle components, all hardware assets are used • No need for monitoring, operations, engineering, planned maintenance Maastricht 2007

  22. Take only necessary functions from IMS Maastricht 2007

  23. Many IMS functions are not useful Maastricht 2007

  24. Take only the necessary IMS functions • SIP Proxy/Registrar • Media Proxy • DNS/ENUM • Voicemail • Presence • User profile database • Accounting Maastricht 2007

  25. An easy to use SIP user agent • Use standard SIP devices • Allow users to use multiple devices and software • Do not use proprietary extensions • Combine communications with what end-user really wants (data sharing) • Easy and pleasant to use Maastricht 2007

  26. Fold all functions into a single box A single server today can handle 20K SIP subscribers and more than 200 media sessions. Maastricht 2007

  27. Play the hat-trick Build a self-organizing overlay network by using Peer-to-Peer technology and use the IMS-in-a-box as nodes Maastricht 2007

  28. Maastricht 2007

  29. Maastricht 2007

  30. From complexity to simplicity Maastricht 2007

  31. Become a better Internet player Maastricht 2007

  32. Questions? Thank you, You may contact me at: ag@ag-projects.com http://ag-projects.com Maastricht 2007

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