Disscussion On How To Improve The VOD System Based On The Broadband Network

With the rapid development of science and technology and broadband networks continue to extend , the users of video-on-demand grow at a rate of 30% per year, it makes the original VOD system overloaded, server security and stability and other properties can not meet the growing needs of the users.How to make the existing VOD system based on resource optimization for the growing number of users with high-quality services without a greater increase in investment will directly affect the application and promotion of VOD.Against this background, this paper, based on the existing system software and hardware, access to key technologies of VOD system, combined with broadband network theory of knowledge, bring out an idea of broadband network optimization of the VOD system and give an analysis of the current broadband MAN and VOD system problems.1) Servers work separately, it's a big hidden trouble.2) No backup for server content.3) Unbalanced between servers.4) A threaten on user recognition software, the system is easily be cracked.5) The double loop network cause the irrational structure of the network stability problems.6) Centralized distribution of VOD, easily cause a load balancing risk of the whole network.7) The poor anti-malicious attacks ability causes the overall risk of a larger network security.8) A large number of users outside the network accessing resulting a pressure.In response to these issues, this project explode in server/network point, optimized the previous VOD system with load balancing, network security, QOS, etc. and also give a detail on transformation of double Star-shaped structure and distributed network.The firstly, it optimized the sever through intergrated system, multicast, MD5, key words filter etc, which will improve quility of system service, stablity and security of sever, Load-bearing capacity.The secondly, double Star-shaped structure makes network structure more suitable.The port and protocol by ICMP pack filter, shield network scanning and shield Typical network virus that can improve security of network and quality of service by Different Service of consumer's usage.Through implementation and reconstruction, this project solved eight existed problems of present VOD system. The optimized VOD system will go on with best state, which can provide secure, stable, effective service for more users.