An Adaptive Suffix-Window Caching Scheme for CM Proxy Server

The proxy server is generally deployed for accessing streaming server in order to serve amount of domain´s clients on Internet simultaneously. For continuous media (CM) services, in order to decrease the initial delay when a user request a VoD service, the proxy stores two kinds of segments: prefix and suffix; former one means the beginning segments of a video, which are allocated in advanced for decreasing initial delay, and latter one means the following segments, which are stored temporally for sharing segments between amount of users. Therefore, the study proposes an adaptive suffix-window scheme, which is able to dynamically schedule the storage allocation for suffix window in response to gain the optimal performance. The experimental results show that the proposed scheme significantly increases the number of served clients and improves the performance of proxy storage utilization when the client owns limited buffer.