期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2015
卷号：4
期号：11
页码：10739
DOI：10.15680/IJIRSET.2015.0411056
出版社：S&S Publications
摘要：Wireless networks are increasingly applied to extend applications with QoS constraints. Two problems comeup when dealing with traffic with QoS constraints. One is admission control, which consists of finding out whether it ispossible to meet the requirements of a set of nodes. The other is finding an optimal scheduling policy to conform to theneeds of all guests. Content distribution networks (CDNs) which function to deliver web objects (e.g., Text files,applications, music and television, and so on) have seen tremendous growth since its emergence. To minimize theretrieving delay experienced by a user with a request for a network object, caching strategies are often applied - contents areduplicated at the boundaries of the mesh, which is nearer to the user such that the network distance between the user and theobject is cut down. In the present report, we are developing light-weight cooperative cache management algorithm aimed atmaximizing the traffic volume served from cache and minimizing the bandwidth cost. As a canonical scenario, weconcentrate on a bunch of distributed caches, either linked directly or via a parent node, and articulate the contentplacement problem as a linear program in order to benchmark the globally optimal performance. Under certain symmetryassumptions, the optimal solution of the linear program is exhibited to possess a rather simple construction. Also interestingin its own right, the optimal structure offers valuable guidance for the purpose of low-complexity cache management andreplacement algorithms. A new improved routing technique is proposed, whose primary destination is to arrive at theenergy consumption balance and prolonging wireless sensor network lifetime. We show that the public presentation of thesuggested algorithm is guaranteed to be within a constant divisor of the globally optimal performance, with far more benignworst case ratios than in prior employment, even in asymmetric scenarios.
关键词：Cooperative caching; Content distribution networks; globally optimal performance.
