On the Location of Routers with Network Support in Content Distribution Networks

In content distribution networks (CDNs), the request routing which directs user requests to an adequate server from the viewpoint of improvement of latency for obtaining contents is one of the most important technical issues. In the request routing, network support technology enables a router to select an adequate server by using information of server load and network delay. In this system, a network support router selects a server based on information between router and server, so the placement of network support router is important to improve performance of request routing. In this paper, we investigate an efficient placement method of network support router making use of statistical characteristics of Internet topology