面向软件定义信息中心型网络的快速转发机制  

Fast forwarding mechanism of software-defined information-centric networking

作　　者：张金钰 王兴伟[1] 李婕 黄敏[3] 

机构地区：[1]东北大学软件学院,沈阳110169 [2]东北大学计算机科学与工程学院,沈阳110169 [3]东北大学信息科学与工程学院,沈阳110819

出　　处：《东南大学学报（自然科学版）》2017年第A01期90-95,共6页Journal of Southeast University：Natural Science Edition

基　　金：国家杰出青年科学基金资助项目(71325002);国家自然科学基金资助项目(61572123;61502092);中央高校基本科研业务费专项资金资助项目(N151604001);中国博士后科学基金资助项目(2016M591449);赛尔网络下一代互联网技术创新资助项目(NGII20150605)

摘　　要：针对软件定义信息中心型网络中数据平面面临的控制器可伸缩性、查找延迟较大等问题,提出了一种面向软件定义信息中心型网络的基于流转发的快速转发机制.该机制设计了名字映射系统来解决控制器可伸缩性问题,并基于快速转发机制建立了流表,在转发阶段可以优先在流表中进行兴趣包和数据包的查找,解决了信息中心型网络名字前缀数量庞大导致的查找延迟较大的问题.同时,该机制的统一索引结构解决了查找切换耗费较高而限制转发速度的问题.实验结果表明,相比原转发机制,快速转发机制吞吐量提升约60%,查找时间减少约51%,转发速率提升约70%,具有较好的性能.Aiming at the problems of controller scalability and long searching delay in the data plane of software-defined information-centric networking,a fast forwarding mechanism based on flow forwarding is proposed. A name mapping system is introduced to solve the controller scalability issues and a flow table is established based on the fast forwarding mechanism to search interest packets and data packets in the flow table in advance,solving the long searching delay caused by the huge number of information-centric networking name prefixes. In addition,the unified index structure is presented to hand over the high consumption of resources for searching and switching,thus limiting the forwarding speed. Simulation results show that compared with the default mechanism,the fast forwarding mechanism has better performances in improving throughput by about 60%,reducing searching time by about 51% and improving the forwarding speed by about 70%.

关 键 词：软件定义网络 信息中心型网络 快速转发 流转发 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]