| 摘要: |
| 在内容中心网络（Content Centric Networking,CCN）中，消费者请求按照原有转发路径无法成功交付移动内容源，兴趣包丢失率高；为保证移动内容源的可达性，则需要对全网路由器进行路由更新，这将造成巨大的更新开销。针对上述问题，提出内容推送和路由扩散相结合的内容源移动管理优化方案。与现有CCN内容源移动方案相比，所提方案充分考虑内容源移动过程中频繁切换接入路由器的情况，利用切换前后接入路由器间的位置信息交互保证移动内容源的可达性；在此基础上，根据内容源与接入路由器的连接时间，分别在切换前后动态采用主动内容推送和限定跳数广播路由更新的方式进一步缩短消费者的请求响应时延。通过仿真分析，所提方案可以有效降低兴趣包丢失率，缩短请求响应时延。 |
| 关键词: 内容中心网络(CCN) 内容源移动 内容推送 路由扩散 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目（61701058）；“十三五”装备预研国防科技重点实验室基金（61422090301）；重庆市基础研究与前沿探索项目（cstc2018jcyjA0743， cstc2016jcyjA0560,cstc2020jcyj-msxmX1021）；重庆市教委科学技术研究项目（KJQN201800633,KJZD-K202000602） |
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| A provider mobility optimization scheme combining content push with routing diffusion |
| DUAN Jie,ZOU Yaqin,HU Xianjing |
| (1.School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;
2.Chongqing Municipal Key Laboratories of Photo-communication and Network for Colleges and Universities,Chongqing 400065,China) |
| Abstract: |
| In the content centric networking(CCN),the consumer request cannot be successfully delivered to mobile content source according to the original forwarding path,the loss rate of interest packets is high.In order to ensure the accessibility of the mobile content source,it is necessary to update the routing information of the whole network routers,which will cause huge updating overhead.According to the above problem,this paper proposes a provider mobility optimization scheme by combining content push with routing diffusion.Compared with the existing content source mobile schemes in the CCN,the proposed scheme fully considers the situation of the content source switching its access router frequently when it is moving,and utilizes location information interaction between access routers before and after handover to ensure the reachability of mobile content source.On this basis,according to the connection time between the content source and the access router,the methods of active content push and broadcast route update with hop count limited are dynamically adopted in this scheme before and after the switch to further shorten the response delay of consumers.Through simulation analysis,the proposed scheme can effectively reduce the interest packet loss rate and shorten the response delay. |
| Key words: content centric networking(CCN) provider mobility content push routing diffusion |
