The Discussion And Application Of The Multicast Technology Based On The Cable Television Net Work

With the rapid development of information technology, integration of Internetand traditional television business, IPTV (TV network) are very good practice in theworld, which will certainly is the inevitable trend of the future TV business. Multicastis the most important form of TV transmission business, here think radio is a specialmulticast. However, in the present situation of our country, since the reform andopening up a large number of traditional cable television network into thousands ofhouseholds, complex and huge cable TV network, resulting in China’s cable TVconversion to IP immediately, two-way exist many difficulties, persistent, this paper isbased on the realization of multicast intelligent presents a new path of traditionaltelevision network.This paper studies the demand and status quo of multicast current cable televisionnetwork, analyzes the multicast technology, and combining with the traditional TVnetwork characteristic, proposed a set of suitable for CATV network simple protocol,focuses on the unified network roots perform shortest path first algorithm to build amulticast distribution tree, the realization of a multicast traditional cable televisionnetwork based on. Finally, through the MFC framework, the realization of simulationsoftware, and this method is tested in the simulation model. This one to many multicasttransmission to realize intelligent traditional cable television network multicast basedon network, can eliminate the loop, eliminating redundant transmission, can bedynamic convergence according to the network status. The research on the core is toeliminate network loop network, regardless of how the changes will always form an acyclic tree network, ensure the multicast flow normal stable transmission, intelligentshield redundant transmission, so that the cable TV network manually linkconfiguration and level distribution of the phenomenon of change, the realization ofintelligent, and this method is tested in the the simulation model.