Web proxy caching mechanism to evenly distribute transmission channel in VOD system

The proxy caching technique can significantly reduce server's load but is still suffered from the shortage of the network bandwidth and from the traffic imbalance among proxies. In this paper, we propose the equivalent loaded proxy caching mechanism to minimize the required transmission bandwidth by using the distribution mechanism determined by the request order and by the popularity of videos calculated with the request frequency. In our technique, videos transmitted from the server are fragmented by Switching Agent and are distributively stored among Head-End-Nodes according to the request order, and SA stores some popular videos to reduce the retransmission of an identical video from the server. From simulation results, we acquire that the proposed web caching mechanism has equivalent loaded among HENs and it can reduce VOD server's bandwidth significantly.