Research On The National High-Speed Distribution System Of Digital Movies Based On Future Network

With the development of film industry,digital film transfer through network is taken into consider.In 2016,the Outline for the Development of Film Digitalization proposed that China should establish a film distribution network.The difficulties are as follows:Firstly,the size of the movie is large and about 200G.Secondly,according to statistics,there were 14,235 cinemas in China by the end of September 2021.If we use ClientServer architecture,huge network resources is required.Therefore,we should consider cost problem,transfer speed and reliability in the system design.This paper implement a distributed digital movie transmission system using P2P architecture and utilize the bandwidth resources between cinema nodes to achieve stable and fast movie distribution.Based on the IPFS,we build a private network by sharing key.It uses the kademlia DHT to locate the position of nodes and resource and bitswap to exchange the data with other nodes.Besides,Optimize P2P content distribution using stochastic linear network coding.We build a network coding module based on IPFS,and change the data exchange protocol.Experimental results show that it can reduce the download time after use of random linear network coding.We design a distributed system to transfer movie,which includes a management control center,secondary transit nodes and basic cinema transmission nodes.And it can be flexibly deployed according to network conditions.In addition,the construction of the national backbone network and the provincial metropolitan area network has been completed.The test results have proved that the speed can be improved using P2P architecture,which provides a solution for other high-speed transfer scenarios.