摘要
命名数据网络(named data networking,NDN)是为了解决当前IP网络中因存在大量重复冗余传输所造成的流量爆炸问题而提出的一种新型网络架构。NDN的网内缓存机制极大地提升了网络资源的利用效率,对于传统的端到端业务来说却略显支持性不足。针对于这一问题,提出了一种NDN网络中的双模式转发模型。该模型对内容分发类业务采用传统的NDN转发机制进行转发处理;对端到端业务,采用定长的标签交换代替变长的名字查找来加速转发,并且不再进行缓存操作。基于ndn SIM的仿真结果表明,相较于传统NDN的单一转发机制,使用该转发模型后有效地节省了内容缓存的空间,同时端到端业务的响应时间减小了约37%。
Named data networking( NDN) is an emerging communication paradigm,which aims at resolving the traffic explosion problem due to repeated and duplicated delivery of content. With this in-network caching mechanism,current NDN provides high utilization efficiency of network resources,but this mechanism introduces inefficiencies for end-to-end services. To resolve this problem,this paper proposes a dual-mode forwarding model. The model uses the traditional NDN forwarding mechanism to forward the content sharing class service,while it uses the fixed label exchange instead of the variable-name lookup for end-to-end services to speed forwarding and cache operation is no longer needed. The simulation results based on ndn SIM show that compared with the simple forwarding mechanism of the traditional NDN,the cache space of CS is saved effectively,and the response time of end-to-end service is reduced by about 37%.
出处
《重庆邮电大学学报（自然科学版）》
CSCD
北大核心
2018年第1期82-89,共8页
Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)
基金
重庆市基础科学与前沿研究重点项目(cstc2015jcyjB0415)~~
关键词
命名数据网络
端到端业务
转发机制
缓存机制
named data networking
end-to-end service
forwarding mechanism
cache mechanism
