CDN Types

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Short overview on CDN Types

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CDN Types

  1. 1. CDN Classification Source: Limelight
  2. 2. Previous CDN classification <ul><li>Server based – Incumbents, Akamai </li></ul><ul><li>Traditional P2P </li></ul><ul><ul><li>“ Bittorrent”-s </li></ul></ul><ul><ul><li>Pando Networks </li></ul></ul><ul><li>Grid Based </li></ul><ul><li>Hybrid Architecture </li></ul><ul><ul><li>“ Peer Assisted Streaming” </li></ul></ul><ul><ul><li>Joost </li></ul></ul>Classify CDN based on delivery technology
  3. 3. CDN Classification - Conventional
  4. 4. Modern CDN Classification <ul><li>Classify CDN based on </li></ul><ul><ul><li>Who pays for the service? </li></ul></ul><ul><ul><li>What is the service goal? </li></ul></ul><ul><li>not on the delivery technology </li></ul><ul><li>Content Provider CDN </li></ul><ul><li>External Service provider CDN </li></ul><ul><li>Internal Service Provider CDN </li></ul><ul><li>Application CDN </li></ul>
  5. 5. CDN Classification - New
  6. 6. Content Provider CDN <ul><li>Goal – Assure delivery, Reduce load and delay from content providers’ sites. </li></ul><ul><li>Examples </li></ul><ul><ul><li>Akamai </li></ul></ul><ul><ul><li>Limelight </li></ul></ul><ul><li>Located – in main service provider’s POP deployed globally </li></ul><ul><li>Client - Content distributers and owners such as CNN, Hulu and “Youtube”-like sites. </li></ul>
  7. 7. External Service providers CDN <ul><li>Goal - Reduce EXTERNAL bandwidth cost for ISP by caching content within the ISP network. </li></ul><ul><li>Examples </li></ul><ul><ul><li>Oversi </li></ul></ul><ul><ul><li>PeerApp </li></ul></ul><ul><li>Located – in main ISP POPs </li></ul><ul><li>Equipment is PC server based or embedded </li></ul><ul><li>Clients - service providers like 012 or 014 (Israeli examples) </li></ul>
  8. 8. Internal Service Provider CDN <ul><li>Goal - reduce INTERNAL bandwidth load inside the service provider network by caching. </li></ul><ul><li>Used mainly in IPTV to distribute premium content (due to cost) </li></ul><ul><li>Examples: Mostly VoD service providers </li></ul><ul><ul><li>Bitband (Motorola) </li></ul></ul><ul><ul><li>Velolcix (Alcatel-Lucent) </li></ul></ul><ul><li>Located – Distributed within service provider’s network </li></ul><ul><li>Equipment is PC server based or embedded </li></ul><ul><li>Clients – IPTV service providers </li></ul>
  9. 9. Peer based CDNs <ul><li>Bittorrent </li></ul><ul><li>Giraffic </li></ul><ul><li>RayV </li></ul>

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