Dissertation > Industrial Technology > Radio electronics, telecommunications technology > TV > Transmission of television signals > Closed-circuit television system ( cable television )

Unidirectional broadcast network of reliable multicast technology research

Author LiuQingSheng
Tutor LuDongMing
School Zhejiang University
Course Computer Applications
Keywords Asynchronous Layered Coding Digital media broadcasting Reliable Multicast Forward Error Correction
CLC TN943.6
Type Master's thesis
Year 2003
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Multicast technology is a data send an effective means for multiple users . Multicast technology is based on commercial and military applications with high bandwidth utilization , and can reduce the burden on the host , the development of faster and faster . But the the multicast technology 's application is subject to two limitations : A ) network : the IP network is not a typical broadcast network , is not conducive to large-scale development of multicast applications . B) Reliability: multicast mainly using UDP / IP ( or raw IP) as the underlying transport protocol , UDP and IP can only provide best effort services can not guarantee stable and reliable transmission of data . This paper attempts to provide a new solution to overcome these obstacles , in the DVB network (digital video broadcasting network) to achieve a reliable file broadcast system . The whole system mainly consists of file layer and reliable transport layer , the two collaborate reliable documents sent from the sender to multiple receivers end . The system does not require any feedback , so the system can work in a one-way broadcast networks do not have any return link is particularly suitable for large-scale multicast applications . This paper describes the reliable multicast protocol , principles and architecture . File layer and reliable transport layer and then based on the number of deficiencies in the application features and regular programs were added to a new mechanism to improve the efficiency of the system . Finally, given the realization of the system , a summary of the system , make an outlook on the system research and development .

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