AWERProcedia Information Technology & Computer Science 2 (2012) 327-334 2nd World Conference on Innovation and Computer Sciences - 2012 An Interactive Proxy Server Cache Mechanism for Video on Demand System Putra Sumari a , Saleh Ali Alomari b *, Ahmed Saleh Hasan c a,b,c Multimedia Computing Research Group, School of Computer Sciences Universiti Sains Malaysia, 11800 USM Pulau Pinang, Malaysia Abstract In this paper, a caching scheme was proposed to reduce the service waiting time in Video on Demand (VOD) system. Currently, most of the VOD systems are using several types of periodic broadcast which have been used to outperform the limitation bandwidth in wireless networks. In the matter of fact, the focus is based on solving the limitations of the Staggered Broadcast (SB) protocol, which are the video segments that are disseminated to mobile clients over a number of wireless channels. This in turn will lead to get a high service delay when mobile clients request the video. This delay is accursed when a client misses the broadcasting phase of the 1st segment from broadcasting channels. Therefore, this paper proposed a caching scheme which we denote as the Proxy Server Cache Mechanism (PSCM) to overcome the start-up service delay. In this scheme, the 1st segment of all broadcasting videos is stored on a stationary proxy server. The late clients can request the 1st segment directly from proxy server instead of waiting for the next broadcasting channel. Balancing technique is used to maintain the clieŶts’ ƌeƋuests oŶ the loĐal pƌodžLJ aŶd eŶsuƌe a faiƌ distƌiďutioŶ of these ƌeƋuests. The P“CM guaƌaŶtee the mobile clients to obtain the 1st segment directly as soon as they arrive. Keywords: Video oŶ DeŵaŶd, CP“M, MANET’s, LF, LP“; Selection and peer review under responsibility of Prof. Dr. Dogan Ibrahim. ©2012 Academic World Education & Research Center. All rights reserved. 1. Introduction Video on Demand (VOD) system is an electronic video rental system where the clients have the ability to request and view the video at any time [14][15]. This system can be implemented based on several approaches according to the technique that has been utilized to design the VOD systems. The * ADDRESS FOR CORRESPONDENCE: Saleh Ali Alomari, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia E-mail address: salehalomari2005@yahoo.com / Tel.: +60174471061. Ext: +604 653 3634. Fax :+604-6573335