Kalogiros- Woice - - a Decentralized System for Ubiquitous VoIP Services

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Kalogiros- Woice - - a Decentralized System for Ubiquitous VoIP Services

  1. 1. WOICE - a Decentralized System for Ubiquitous VoIP Services Authors: Costas Kalogiros Costas Courcoubetis Panayotis Antoniadis
  2. 2. Motivation <ul><li>‘ Voice is just another Internet application’ </li></ul><ul><ul><li>Multiple end-user identifiers at the same time </li></ul></ul><ul><ul><ul><li>End-devices with multiple network interfaces </li></ul></ul></ul><ul><li>VoIP can be an antidote for ‘monopoly termination’ problem, but: </li></ul><ul><ul><li>ubiquitous access to Internet is required </li></ul></ul><ul><ul><li>interconnection agreements must be promoted </li></ul></ul>
  3. 3. WOICE (Wireless vOICE) <ul><li>A distributed system supporting ubiquitous VoIP services over WiFi networks </li></ul><ul><ul><li>Flexible marketplace </li></ul></ul><ul><ul><ul><li>Business opportunities for all participants </li></ul></ul></ul><ul><ul><ul><li>Semi-automated contract management </li></ul></ul></ul><ul><ul><li>VoIP-peering accommodation </li></ul></ul><ul><ul><ul><li>Community spirit establishment </li></ul></ul></ul><ul><ul><ul><li>Mapping system for end-user identifiers </li></ul></ul></ul><ul><ul><ul><ul><li>Telephone number ↔ SIP address </li></ul></ul></ul></ul>
  4. 4. WOICE entities <ul><li>WOICE WISPs : Hot-Spot owners setting the access network over which WOICE services can be provided to end-users by third parties. </li></ul><ul><li>WOICE ITSPs : ITSPs that use WOICE modules for offering and supporting VoIP services to their subscribers. </li></ul><ul><li>WOICE Aggregators : WOICE ITSPs that also set up bilateral agreements with WOICE WISPs. </li></ul><ul><li>Traditional providers : PSTN, cellular and VoIP providers being interconnected to WOICE. </li></ul><ul><li>End-users : Regular Hot-Spot users (like employees) or visitors that own dual WiFi/cellular handsets. </li></ul>
  5. 5. WOICE network scenario
  6. 6. WOICE service scenario <ul><li>WOICE WISP collects mobile number of “User A” and assigns a temporary SIP address </li></ul><ul><li>WOICE WISP informs WOICE Aggregator about the new mapping </li></ul><ul><li>WOICE Aggregator advertises this mapping to WOICE network </li></ul><ul><li>“ User B” calls “User A” on her traditional mobile phone number </li></ul><ul><li>WOICE ITSP of “User B” routes the call to the temporary SIP address of “User A” </li></ul><ul><li>WOICE ITSP and WOICE Aggregator exchange accounting information </li></ul><ul><li>End-to-end VoIP call is being performed </li></ul><ul><li>WOICE ITSP and WOICE Aggregator rate each other and values are stored in WOICE network </li></ul>WOICE Aggregator F WOICE ITSP WOICE WISP Rest WOICE network User B User A
  7. 7. WOICE modules (1/2) <ul><li>Contract life-cycle management </li></ul><ul><ul><li>Contract terms negotiation </li></ul></ul><ul><li>Call routing information management </li></ul><ul><ul><li>Collection of authenticated reachable numbers </li></ul></ul><ul><ul><li>Propagation of/search for supported numbers </li></ul></ul><ul><li>Call management </li></ul><ul><ul><li>… especially call routing & setup </li></ul></ul><ul><li>Accounting : </li></ul><ul><ul><li>Transaction tracking </li></ul></ul>
  8. 8. Contract terms negotiation
  9. 9. Collection of authenticated reachable numbers
  10. 10. WOICE modules (2/2) <ul><li>Reputation mechanism </li></ul><ul><ul><li>Distributed mechanism for storing a measure of participant’s aggregated behaviour </li></ul></ul><ul><li>System rules </li></ul><ul><ul><li>Distributed configuration of system parameters </li></ul></ul><ul><li>Group membership: </li></ul><ul><ul><li>Join/leave/expel procedures </li></ul></ul><ul><ul><li>Distributed partner search </li></ul></ul>
  11. 11. Non-peer Interoperation
  12. 12. Peer Interoperation
  13. 13. WOICE impact (1/2) <ul><li>WOICE WISPs </li></ul><ul><ul><li>Core business becomes more attractive </li></ul></ul><ul><ul><li>New potential revenue streams </li></ul></ul><ul><li>WOICE Aggregators, WOICE ITSPs </li></ul><ul><ul><li>Advanced VoIP services roll-out </li></ul></ul><ul><ul><li>Lower termination costs </li></ul></ul>
  14. 14. WOICE impact (2/2) <ul><li>Traditional providers </li></ul><ul><ul><li>Lower termination costs </li></ul></ul><ul><ul><li>Higher competition from ITSPs </li></ul></ul><ul><li>End users </li></ul><ul><ul><li>Availability of advanced VoIP services </li></ul></ul><ul><ul><li>Lower charges due to increased competition </li></ul></ul><ul><li>Regulators </li></ul><ul><ul><li>Less need for ex-ante regulation </li></ul></ul>
  15. 15. Summary <ul><li>WOICE is a collaborative marketplace allowing participants to implement a wide range of business models. </li></ul><ul><li>Sufficient levels of trust will be built through carefully designed incentive mechanisms. </li></ul><ul><li>“ Plug and play” functionality for effortless participation </li></ul>
  16. 16. Thank you for your attention! Questions?

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