Research And Implementation Of Mobile Switching Technology In Information Centric Networking

The number of mobile devices in the network has increased in recent years,one of the core features of the future Internet is the mobility of device,it is necessary to apply ICN in wireless communication environment.In ICN,the mobility of request node causes that the content could not reach the request node in time,resulting in the increase of content retrieval time.At the same time,during the acquisition of the request content,the mobility of intermediate node causes that the packet could not find the next hop forwarding node and the return path of the packet is interrupted.Therefore,it is of great value to study the mobility switching methods of request node and intermediate node of ICN in wireless communication environment.In this paper,the research status of the mobility management of request node and intermediate node is analyzed firstly.For the long delay caused by the mobility of request node,a method for mobile switching of request node based on distributed cache is designed.In this scheme,the provider will cache the content to the router of the edge access network before the request node is moving in order to ensure that the request node could get the content from the access router each time it moves to a new location.The mathematical modeling of the content cache placement scheme is established and its goal is minimizing the delay cost of acquiring content and cache cost caused by cache operation,and the content updating algorithm is proposed which improves the utilization rate of node cache.For the interruption of path caused by the mobility of intermediate node,a method for mobile switching of intermediate node based on node selection is designed.In this scheme,when node forwards the data packet,firstly the forwarding probability of nodes is calculated by the forward probability calculation method,then the node with the maximum value is selected to forward the packet which prevents the packet loss.Based on ndnSIM simulation,important functions of the above method are realized,including determination of content caching scheme,formulation of the data packet forwarding strategy and so on,experiments on simulation platform show that the proposed scheme has better performance in the request node's delay of acquiring content and the request efficiency.