Content delivery mechanism in Delay Tolerant Network

Abstract

Recently, content delivery has become a hot research field. However, with the increase of network scale and the mobility of users, content delivery in traditional network needs to deploy a number of content servers to cache contents, so as to satisfy multilevel users. Deploying so many servers will lead to a lot of costs, and it will cause the delay of network increase at the same time. Therefore, in order to improve the efficiency of content delivery, scholars propose to distribute contents in Delay Tolerant Network (DTN), which utilizes the mobility of nodes to deliver contents and can bear delay. In this paper, we qualitatively analyze and compare content delivery schemes have been raised, which are based on the analysis of the basic characteristics of the delay tolerant network. Through analyzing the advantages and disadvantages of each scheme, we make a conclusion and point out the further research directions.