Research On Forwarding Strategy Of High Real-time Named Data Mobile Ad-hoc Network

Mobile Ad-hoc Network(MANET)as a typical wireless network,its performance is susceptible to the high-speed movement of network nodes,usually requires at least one complete point between a pair of nodes that communicate with each other within a certain period of time Point path to achieve the successful transmission of control signaling and data information.This paper studies the development status of forwarding strategies based on named data mobile self-organizing networks,focusing on the analysis of LFBL(Listen First Broadcas Later,LFBL)forwarding strategies.The use of NDN technology to enhance the data transmission performance in the MANET network is beneficial to the problems of node mobility,high topology dynamics,and intermittent links.This article uses the Name Data Network(Name Data Network,NDN)technology to effectively reduce the negative impact of frequent link switching and dynamic topology changes in MANET on performance.For the mobility characteristics of MANET nodes,the shortest path routing algorithm in NDN is improved,allowing the forwarded interest packets to be stored in the PIT(Pending Interest Table,PIT)table of the node adjacent to the shortest path node,in order to return the requested data packet creating a backup path to reduce the probability of the return path interruption caused by the MANET topology change,thereby reducing the probability of the return data packet loss.This paper designs a mobile self-organizing network simulation platform based on ns-3 and named data network simulation tool ndnSIM architecture to verify the performance of SPPB(Shortest Path Plus Backup,SPPB)forwarding strategy.Based on this platform,the shortest path plus backup path forwarding strategy SPPB is implemented.Based on the simulation method,the network performance of different forwarding strategies in specific scenarios is compared.Non-retransmission simulation experiment 1: The simulation results show that the SPPB forwarding strategy proposed in this paper has a slightly higher network bandwidth than LFBL;the average request delay is the lowest and overall it is about 10% lower than LFBL;About 10%.In order to further verify the performance of the SPPB forwarding strategy,this paper based on DASH(Dynamic Adaptive Streaming over HTTP,DASH)did a retransmission and complete delivery of real file simulation experiment 2: The simulation results show that in random high-speed mobile(30m / s),SPPB forwarding has the lowest bandwidth usage in the overtime retransmission simulation experiment and is positively correlated with the number of nodes;SPPB forwarding strategy with the increase of simulated nodes,the average delay is further reduced;under the condition of minimum delay SPPB has a higher request success rate than LFBL and flooding algorithms.Therefore,this paper verifies that the SPPB forwarding strategy inherits the traditional shortest path forwarding strategy and consumes less bandwidth,and further reduces the average request delay and improves the request success rate.It provides an important reference significancefor the actual mobile ad hoc network information forwarding strategy.