Content Retrieval Method in Cooperation with CDN and Breadcrumbs-Based In-Network Guidance Method

Yutaro INABA  Yosuke TANIGAWA  Hideki TODE  

IEICE TRANSACTIONS on Communications   Vol.E99-B   No.5   pp.992-1001
Publication Date: 2016/05/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2015AMP0010
Type of Manuscript: Special Section PAPER (Special Section on Internet Architectures and Management Methods that Enable Flexible and Secure Deployment of Network Services)
Breadcrumbs,  cache,  content-oriented network,  Breadcrumbs+,  

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These days, in addition to host-to-host communication, Information-Centric Network (ICN) has emerged to reflect current content-centric network usage, based on the fact that many users are now interested not in where contents are but in acquired contents themselves. However, current IP network must still remain, at least from deployment perspective, as one of near future network architectures. This is because ICN has various scalability and feasibility challenges, and host-to-host communication is also diffused like remote login, VoIP, and so on. Therefore, the authors aim to establish the feature of ICN on conventional IP network to achieve feasible and efficient architecture. We consider that, as a feasible and efficient architecture, only user-edges keep some contents' caches within their computational and bandwidth limitations and contents should be replicated also on some replica servers dispersedly to assure contents' distribution even if user caches are not found. To achieve this, in this paper, we propose to operate Content Delivery Network (CDN) and Breadcrumbs (BC) frameworks coordinately on IP network. Both CDN and BC are important as a content-centric technique. In CDN, replica servers called surrogates are placed dispersedly in all over the Internet. Although this provides users with contents from nearer surrogate servers, the surrogate servers have higher workload to distribute contents to many users. In the proposed method, in cooperation with BC method that is proposed to implement ICN on IP network, the surrogate server workload is drastically reduced without largely increasing hop count for content delivery. Although it needs some functions to implement our approach such as adopting BC architecture to routers, calculating and reporting information required for cooperation of BC method with CDN, the cost for the functions in our solution is not so significant. Finally, we evaluate the proposed method with CDN we carefully modeled through simulation.