基于网络编码的命名数据网络研究

Named data networking with built-in network coding

命名数据网络(NDN)作为新兴的下一代网络体系结构,支持网络缓存和多路径传输,但由于节点间协调的复杂性,两者未能充分结合以发挥NDN高效传输内容的潜力。网络编码(NC)允许网络节点对多个报文再编码,由此产生的随机性使网络可从多数据源并行传输数据,简化节点间协调。提出基于网络编码的NC-NDN系统模型,通过设计具体的报文格式,报文的转发处理流程以及缓存替换策略以充分发挥NDN网络缓存和多路径传输的优势。实验结果表明,NC-NDN系统可提高网络传输数据内容的性能。

As the most promising future Internet architecture,named data networking(NDN)intrinsically supports in-network caching and multi-path transmission.However,due to the required complicate coordination among network nodes,in-network caching and multi-path transmission are difficult to be combined together to achieve efficient content transmission.Network coding(NC)allows nodes to encode messages and the resulting randomness enables parallel multisource content delivery without requiring sophisticated coordination among network nodes.This work proposed an NC-NDN model that builds network coding in NDN.By tailoring the packet formats,packet process logic,and cache maintenance at network nodes,the advantages of in-network caching and multi-path transmission are effectively exploited.The experimental results validate that the NC-NDN system can improve the performance of content delivery.