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ICN Considerations for ISP’s Existing Networks

ICN Considerations for ISP’s Existing Networks. Lichun Li , Xin Xu, Jun Wang, Zhenwu Hao lilichun@gmail.com {xu.xin18, wang.jun17, hao.zhenwu}@zte.com.cn. Deployment Considerations: ICN over layer-2 or layer-3? . ICN scenarios: Internet, ad hoc networks, DC, etc

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ICN Considerations for ISP’s Existing Networks

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  1. ICN Considerations for ISP’s Existing Networks Lichun Li, Xin Xu, Jun Wang, Zhenwu Hao lilichun@gmail.com {xu.xin18, wang.jun17, hao.zhenwu}@zte.com.cn

  2. Deployment Considerations: ICN over layer-2 or layer-3? • ICN scenarios: Internet, ad hoc networks, DC, etc • ISP’s existing networks: ICN overlay over IP network • Incremental deployment allowed • No need to deploy content routers in the places where link cost is low and QoS is satisfied. • Fewer content router tiers: lower CAPEX and OPEX

  3. Deployment Considerations: Benefits of cache at network edge • earlier cache hit means better QoS and less link cost • reducing the load of core content routers

  4. Deployment Considerations: benefit of cache in core networks On the Scale and Performance of Cooperative Web Proxy, SOSP 99 • high cache hit rate requires both large cache size and large user number • Only possible in the core network • DPI cache size today: 100s TB 0.6~2% 6~20% UGC TV/movie Cache hit rate increases 20-25% Cache size increases more than 100 times Web caching and Zipf-like distributions: Evidence and implications, Infocom 99.

  5. Routing and Caching Control • Decentralized • Routing table populating: Content routers run routing protocols and routing algorithms • Cache replacement: content routers run replacement algorithm, e.g. LRU • Centralized • Routing table populating: controller(s) collect topology data, generate routing tables and send routes to routers • Routing and Caching policies: controller(s) send policies to routers

  6. Routing and caching policies • To meet QoS requirement • an ISP may decide routing path and cache priority considering factors like content type, content popularity and the distance to the content source. • To reduce link cost • an ISP may assign more cache resources for the contents passing through costly links by controlling routing path and/or cache priority • To balance link load and cache load • To provide better services • For paid users or paid content providers

  7. Example of ICN inside ISP • Centralized ICN controller • Routing control • Caching policy control Content source ICN controller Content router at core network ICN over IP Content router at network edge IP router

  8. Thank you!

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