内容中心网络中名字查找技术的研究

Research on Name Lookup in Named Data Networking

内容中心网络作为一种新型的未来网络体系架构被提出，以满足当前互联网信息共享的需求。内容中心网络使用类似域名的层次化名字结构对内容进行标识、路由和查找。由于互联网中内容众多，使用名字前缀构建的路由表，比传统的IP路由表大2～5个数量级，且由于名字查找依旧遵循最长前缀匹配原则，使得实现高速名字查找是一个富有挑战性的难题。分析了名字查找的技术挑战、实施难点，介绍了主要技术方法以及当前在名字查找领域的主要研究成果。

Named data networking （NDN） proposed as a new future architecture for the intemet, aims to satisfy the requirement of information sharing among the users. NDN applies the hierarchical names to identify contents, route packets and retrieve information. Given the massive amount of contents and the longest prefix matching principle, achieving high speed name lookup exhibits a big challenge to implement NDN in real networks. The technical challenges of name lookup were firstly analyzed, then the main techniques to achieve wire-speed name lookup and their corresponding research results were introduced.