Research And Implementation Of Streaming Media Data Transmission Method For NDN

Named data networking is one of the main branches of the future network architecture that "revolutionally" reconstructs the protocol architecture of the network to meet the needs of modern networked applications.One of the hot spots in the research of named data network applications is streaming media data.During the transmission of streaming data,the one-interest-to-one-data transmission mode will cause the streaming interest to occupy unnecessary uplink network bandwidth and consume excessive processing resources of network nodes,meanwhile Increased data transmission delay.High-speed,high-density streaming media data occupy a large amount of network cache space.Cache policies based on global considerations can not guarantee the fairness of utilizing cache space for a variety of network data.In order to solve this problem,this paper combines streaming media data encoding and decoding format to segment the streaming media data.According to the characteristics of streaming media data continuity and real-time,combined with the time information to achieve streaming media streaming unit Method,a data packet forwarding method of a named data network is realized by reserving a streaming media interest packet in a network forwarding node.In addition,according to the type of data,the network cache space is classified and managed,and the fairness of the cache of different types of data is guaranteed by a proportional fairness algorithm.The cache benefit value of streaming media data is defined according to the characteristics of time-lapse streaming media data and codec characteristics.According to the benefit of cache replacement.Finally,on the basis of the above method,we designed and implemented the streaming media transmission system under the named data network,deployed it in the real network equipment,and passed all the functional tests.By analyzing a large number of experimental results,compared with the original transmission method of named data network,the transmission method realized in this paper can effectively reduce the bandwidth consumption of streaming media and reduce the resource consumption of network nodes.The network caching strategy implemented in this paper improves the cache fairness of different types of applications without significantly reducing the overall hit rate of the network cache.