内容推送和路由扩散相结合的内容源移动管理优化方案

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...

A provider mobility optimization scheme combining content push with routing diffusion

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.