融合SDN的信息中心网络研究综述

摘要

Information-Centric Networking is a future direction of the evolution of the network,which basic idea is to replace the IP with the content name to become the core of the network,and thus can meet the demand of content distribution.However,the existing network infrastructure cannot directly support the implementation of ICN network.Software Defined Network decouples data plane and control plane,providing flexible network programmability and making it possible for the ICN architecture to be implemented in real networks.Implementation of ICN network based on SDN architecture has become a hot research direction.This paper first summarizes the technical characteristics of ICN and SDN,and then analyzes the existing ICN network implementation scheme under SDN architecture.Finally,we discuss the benefits of SDN in terms of key issues such as route forwarding,cache management,and mobility in ICN implementation.%信息中心网络ICN作为未来网络演进的主流方向,其基本思想是以信息名字取代IP地址成为网络运行的核心,以更好满足内容分发的需求.但是现有的网络基础设施并不能直接支持ICN网络的实施.软件定义网络SDN将数据平面与控制平面解耦合,提供了灵活的网络可编程能力,使得ICN架构在真实网络中的实现成为可能.基于SDN架构实现ICN网络已成为热点研究方向.本文分析了ICN与SDN的技术特点,介绍了已有的SDN架构下的ICN网络实现方案,针对ICN网络实现中的路由转发、缓存管理、移动性等关键问题,讨论引入SDN架构所带来的益处.