Research On Key Problems Of Digital Image Sharing System Based On NDN In MANET

With the rapid development of mobile devices and mobile data,the demand for the Internet is growing day by day.People want to be able to access the information and services they need anytime and anywhere,regardless of whether they are on the move or not.The mobile Internet has adapted to the needs of the times and achieved a leapfrog development.China's Internet industry is moving towards standardization and value,and the mobile Internet has promoted the transformation and upgrading of the entire Internet industry.According to report on the work of the government on March 5,2017,this year's increase in network speeds and cost reductions will take further steps to eliminate domestic long-distance and roaming charges for mobile phones altogether.Existing mobile data cellular networks require users to pay high costs when sharing and receiving high-quality images(including pictures and videos).On the other hand,most existing video-sharing platforms tend to restrict the sharing of images on mobile terminals,making it impossible to meet the needs of mobile networks to share information at any time and anywhere.In addition,different nodes in the same region are often unable to share information with each other when receiving the same image,resulting in a huge waste of network resources.Unlike traditional wireless networks,MANET does not require any infrastructure to be pre-positioned for rapid use,and users do not have to pay any fees to share their data.Mobile nodes can frequently leave or join wireless ad hoc networks without interfering with normal MANET communications.Mobile nodes act as both data consumers and forwarders.Consumers are responsible for processing the data,while forwarders are equivalent to routing the data to the whole network through mobile nodes to complete the process of communication.The research goal of this paper is to study an image sharing system based on NDN mechanism in MANET network.The whole system network is composed of mobile devices,each mobile device acts as producer,consumer and forwarder at the same time.The mobile device can forward and cache the information through NDN mechanism during the mobile process,and make other mobile device nodes obtain the published image information safely and efficiently without using the central server used in the traditional mode.Among them,this paper proposes a new MNST(Moving Node and Secured Transmission)algorithm based on the original naming strategy,designed to solve the problem of mobile devices frequently joining and leaving the network,and in the node mobile state effectively reduce response delay time,reduce service interruption;comprehensive consideration of the impact of time and risk,reasonable allocation of image and key cache,increase system security and reliability.routing and caching strategy of NDN.In view of the proposed NDN forwarding policy MNST algorithm adapted to MANET,this paper further uses the NDN simulation tool ndnSIM to carry out simulation experiments to evaluate the performance of the strategy.Experimental results show that the MNST algorithm can effectively improve the response rate of interest packets in the moving state,reduce the latency of acquiring packets,and thus effectively reduce the service interruption and improve network performance caused by node movement.