Dynamic scheduling algorithm for streaming media based on CDN

Abstract

The scheme that the patch bytes were segmented and cached was employed.The cache window size was up-dated periodically according to the popularity of streaming media object.The principle was obeyed that the data cached for each streaming media object were in proportion to their popularity at the proxy server.Simulation results show that the strategy is more adaptive than MBP（multicast batched patching） algorithm and OBP（optimized batch patch-ing）+prefix ＆ patch caching algorithm.It can significantly reduce patching data through patching channel under the cir-cumstance of the same maximum cache space.It can effectively reduce the server load and network bandwidth usage on backbone link.It can also save the transmission cost.

Keywords

• CDN;streaming media;scheduling algorithm;transmission cost