Research On Forwarding Strategy For Named Data Mobile Ad Hoc Network

Named data mobile ad hoc network(NDMANET),as an organic combination of named data network(NDN)technology and traditional mobile ad hoc network(MANET),can effectively solve a series of problems of MANET caused by node movement,frequent link switching and topological dynamic time-varying characteristics,such as high packet loss rate,high bit error rate and frequent connection interruption.Packet routing policy has an important effect on the performance of NDMANET.The current packet routing strategy is originated from the practice of NDN in the wired network and does not effectively optimize the link characteristics and topology characteristics of the high dynamic MANET,so it has a large space for performance improvement.With a view to improve the service quality of NDMANE,aiming at the dynamic characteristics of nodes,links and topologies,this paper uses the concept of "node activeness" in the forwarding strategy of capacity-saving / delay network for reference,researches its application in the packet routing strategy of NDMANET,calculates the activeness of all nodes in the network periodically and dynamically,and divides the nodes into high activeness and low activeness and conducts storage and forwarding of interest packets and data packets only using high activeness nodes so as to improve the efficiency of packet routing and reduce the network bandwidth consumption resulted from ineffective redundant information.Specifically,in view of the shortcomings of the current packet routing algorithm used in NDMANET,this paper firstly proposes an innovative packet routing strategy based on the activity of network nodes.Because this strategy doesn't need to change the NDMANE node network protocol architecture,but to add node activeness information to the NDN native interest packets and data packets,it is excellent in compatibility;secondly,based on the extensive open source NS-3 / ndnSIM simulation framework used in the industry,this builds a packet routing policy simulation test program for NDMANET so as to comparatively verify and accurately test the performance of various mainstream packet routing policies;thirdly,the paper proposes the design scheme of NDMANET physical item test platform;fourthly,based on the as-built NDMANET simulation test program,the paper conducts performance comparison and test for the system's default flooding routing strategy,typical shortest path routing strategy and the routing strategy based on node activeness proposed hereunder.The experimental results show that in the middle and high dynamic MANET scenarios,the packet routing strategy based on node activeness can increase the storage capacity of nodes reasonably,keep the lower average request delay,obtain better request response rate and consume less network bandwidth.Finally,exampled by the application of the strategy in the UAV bee colony network scenario,the simulation experiment hereunder shows that the strategy can effectively improve the request success rate compared with LFBL strategy,and significantly reduce the average delay and network traffic,which provides an important reference for network actual deployment and application.