NDN 中快速转发响应机制的研究

摘要

Named data network ( NDN) was a novel network architecture centered on content data.NDN was a one-to-one package delivery.The consumer could accept one data packet only by sending a packet of interest.For some network applications such as the live media stream and online audio conference or some requests of large files, consumer has to send a lot of packets of interest to get all the data packets in this kind of one-to-one packet delivery.This would increase network traffic, increase PIT size and the number of forwarding based on FIB will also increase.A new mechanism which aggregate similar interest packets was proposed to improve the efficient of transport of NDN.The simulation experiments proved the effectiveness of this one-to-many mechanism.%命名数据网络( named data network,NDN)是一种以数据为中心的新型网络体系结构.NDN遵循一对一的包转发策略,请求者发送一个兴趣包最多只能接受一个数据包.这种一对一的包转发策略在处理多媒体直播流或在线音频等实时应用时,请求者需不断发送兴趣包才能获得完整的数据包,大量的兴趣包不仅会浪费网络流量、占用大量的待处理兴趣包表的存储空间,而且基于转发信息表的查找次数也会增多.因此,提出一种一对多的包转发策略,请求者发送一个兴趣包就能接收多个数据包,来提高实时应用下整体网络的性能,并通过仿真实验证明一对多包转发响应机制确实比一对一转发策略性能更优.