IDATE Net-Neutrality during DigiWorld Summit 2011

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IDATE Net-Neutrality during DigiWorld Summit 2011

  1. 1. CDN and Transparent Caching in Net Neutrality Context November 2011, Digiworld Summit www.ict-ocean.eu The research leading to these results has received funding from the European Union's Seventh Framework Programme ([FP7/2007-2013]) under grant agreement n° 248775. Vincent BONNEAU, Head of Internet Unit, IDATE
  2. 2. Introduction <ul><li>Numerous new non-exclusive models with revenue transfers will be investigated by telcos beyond just traffic management </li></ul>Retail « Wholesale » Telco Content & Service End-user Volume QoS Service & Content #1: Pay per use / UBB #2: Pay per quality or throughput #3: New interco #4: Performance-based #6: Bundles traffic/service #5: Traffic wholesale Pricing based on
  3. 3. What is a CDN? <ul><li>A technical solution for delivery </li></ul><ul><ul><li>Caching </li></ul></ul><ul><ul><li>Switching </li></ul></ul><ul><ul><li>Load balancing </li></ul></ul><ul><ul><li>Other techniques for Dynamic Site Acceleration </li></ul></ul><ul><ul><li>Taking into account many non-delivery aspects </li></ul></ul><ul><li>A dynamic market </li></ul><ul><ul><li>Benefiting from both video and e-commerce </li></ul></ul><ul><ul><li>Cloud also as a driver </li></ul></ul><ul><ul><li>Trusted so far by Akamai </li></ul></ul>DSA CDN principles
  4. 4. Is CDN different from Traffic Management ? <ul><li>Differences in the network </li></ul><ul><ul><li>So far mostly within backbones and close to core networks (but outside) </li></ul></ul><ul><ul><li>Can be operated by third parties including content providers </li></ul></ul><ul><ul><ul><li>Google Global Cache </li></ul></ul></ul><ul><li>Positive differentiation </li></ul><ul><ul><li>Key Instrincal assets bringing QoS </li></ul></ul><ul><ul><ul><li>Better routing </li></ul></ul></ul><ul><ul><ul><li>Caching to avoid resending </li></ul></ul></ul><ul><ul><ul><li>Shorter paths </li></ul></ul></ul><ul><ul><li>But not at the expense of other services like DiffServ </li></ul></ul><ul><ul><ul><li>No degradation </li></ul></ul></ul><ul><ul><ul><li>Can still be congested anyway </li></ul></ul></ul><ul><ul><li>Some services may combine priority and CDN </li></ul></ul>DiifServ Google global cache principles
  5. 5. CDN is already at the heart of some Net Neutrality debates <ul><li>CDN directly linked to the debate of QoS : Is CDN already a form of two-speeds Internet? </li></ul><ul><ul><li>Small players have less access to it (financial reasons) and pay more (per unit basis) </li></ul></ul><ul><ul><li>Large players build their own </li></ul></ul><ul><ul><li>Can be linked with traffic management (BT case) </li></ul></ul><ul><li>CDN is directly linked to the transit/peering/paid peering debate </li></ul><ul><ul><li>Economics of CDN based earlier on free peering with ISPs (saving transit that way) </li></ul></ul><ul><ul><li>Economics of CDN directly linked with transit bought to enable the CDN </li></ul></ul><ul><ul><li>Transit providers becoming competitors with major impacts (Comcast Level3 Netflix case) </li></ul></ul>BT Wholesale CDNs
  6. 6. What’s next for CDNs : Telco CDN <ul><li>Telco CDN principles </li></ul><ul><ul><li>CDN inside the telco network </li></ul></ul><ul><ul><ul><li>Going deeper in the network </li></ul></ul></ul><ul><ul><li>Telco CDNs focusing mostly on video content and big files rather than non-video traffic </li></ul></ul><ul><ul><ul><li>Looking more at caching solution </li></ul></ul></ul><ul><ul><li>Tackling the video issue </li></ul></ul><ul><ul><ul><li>Not just a volume issue, but also a problem of asymetry and impact on the core network </li></ul></ul></ul><ul><li>Hybrid solutions </li></ul><ul><ul><li>Can work for both OTT and managed services </li></ul></ul><ul><ul><li>A few telcos even deploying it for only internal use </li></ul></ul>Ratio of core-edge traffic Comcast network description Source: Comcast
  7. 7. Transparent caching : the other way to do telco CDN <ul><li>Principles </li></ul><ul><ul><li>Same principles than CDNs in terms of caching, but without agreements with content providers </li></ul></ul><ul><ul><li>Free for content providers but no control </li></ul></ul><ul><ul><li>Caching on reverse engineering (should be less efficient) </li></ul></ul><ul><li>Big questionmark on legal framework </li></ul><ul><ul><li>Unclear legal framework about storing/hosting third party content in Europe </li></ul></ul><ul><ul><ul><li>DMCA seems more in line with it </li></ul></ul></ul><ul><ul><li>Telcos avoiding Europe for now but developing it in emerging countries </li></ul></ul>Transparent caching principles
  8. 8. Telcos arbitrages for CDN development <ul><li>CAPEX/OPEX savings as the first driver </li></ul><ul><ul><li>Savings in most situations (especially if the telco was buying transit) </li></ul></ul><ul><ul><li>Very depending on the arbitrage (depth, high end/low servers) </li></ul></ul><ul><li>But also looking for new revenues </li></ul><ul><ul><li>From both connectivity and VAS </li></ul></ul><ul><ul><li>Sending a signal to content providers </li></ul></ul><ul><ul><li>Grabing a share of the CDN market </li></ul></ul><ul><li>Different options to go for it </li></ul><ul><ul><li>Buy/Build/Resell </li></ul></ul>Telcos options regarding CDN and Transparent caching
  9. 9. The big question behind telco CDN : CDN interconnection <ul><li>A necessary step for telco CDNs </li></ul><ul><ul><li>A market under the control of a few global CDNs </li></ul></ul><ul><ul><li>Scope issues : Too many contracts from a content provider point of view (a telco CDN offering QoS only towards its eyeballs) </li></ul></ul><ul><li>Some big technical challenges for interconnection </li></ul><ul><ul><li>CDN rules : What to cache? For how long? Where to cache? </li></ul></ul><ul><ul><li>Different equipment in different networks </li></ul></ul><ul><ul><li>Not allowing a third party in its own network </li></ul></ul><ul><li>A few solutions in discussion </li></ul><ul><ul><li>OCEAN solutions </li></ul></ul><ul><ul><li>Standardization in progress (CDNI working group at IETF, ETSI, etc…) </li></ul></ul>Cisco exchange proposition OCEAN (an approach for interconnection)
  10. 10. The telco dilemma with telco CDN <ul><li>Two objectives in contradiction when setting the price </li></ul><ul><ul><li>Reduce the costs </li></ul></ul><ul><ul><ul><li>Implies getting as much traffic as possible (even for free as in transparent caching) </li></ul></ul></ul><ul><ul><li>Increase the revenues </li></ul></ul><ul><ul><ul><li>Implies additional costs for content providers/global CDNs not necessarily to pay </li></ul></ul></ul><ul><ul><ul><li>Implies less traffic </li></ul></ul></ul><ul><li>Which depth in the network? </li></ul><ul><ul><li>Big server costs already when addressing the backhaul, but more efficient </li></ul></ul><ul><li>Raising some questions on other interconnection products </li></ul><ul><ul><li>Will ISP push it and influence peering/transit markets? </li></ul></ul>
  11. 11. New business models <ul><li>A need for new business models </li></ul><ul><ul><li>Situation is risky with status quo which would imply less incentives for deployment </li></ul></ul><ul><li>In line with new interconnection models being discussed </li></ul><ul><ul><li>Paid peering </li></ul></ul><ul><li>Everyone may benefit </li></ul><ul><ul><li>Higher QoS should be bring more traffic </li></ul></ul><ul><ul><li>At least better margins for many players </li></ul></ul><ul><li>Examples of potential models </li></ul><ul><ul><li>Pay per cache </li></ul></ul><ul><ul><li>Cascading CDNs </li></ul></ul>
  12. 12. Open Questions <ul><li>Is CDN fully Net Neutrality compliant? </li></ul><ul><li>What telco CDN will change in the interconnection models? </li></ul><ul><li>Should telco CDN be regulated? </li></ul><ul><li>Should CDN interconnection be regulated? </li></ul>

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