Research On Real-time Performance Enhancement Technology Of Named Data Mobile Ad Hoc Network

In recent years,Mobile Ad Hoc Networking(MANET)has been widely used in emergency scenarios such as military,rescue,and medical care.However,the network performance of current mobile ad hoc networks is affected by dynamic changes in node locations and link connectivity.Due to the influence of frequent interruptions and other factors,it is impossible to better guarantee the real-time requirements of upper-level services and applications.Therefore,it is particularly meaningful to study the real-time performance optimization of mobile ad hoc networks.Named Data Networking(NDN)uses content-based naming,forwarding,routing,and caching mechanisms to overturn the traditional TCP/IP protocol cluster-based computer network architecture.It has content as the center and supports in-network storage(in-network cache)and other features,especially suitable for mobile ad hoc networks.The introduction of named data network architecture in mobile ad hoc networks will effectively solve the technical problems of unsatisfactory network service quality and difficulty in guaranteeing real-time performance due to the time-varying network topology in current mobile ad hoc networks.The thesis investigates the development status of the forwarding strategy of named data mobile self-organizing network at home and abroad,focusing on the real-time performance enhancement technology for named data mobile self-organizing network,and uses named data network protocol to replace the IP protocol in traditional selforganizing network for network interaction.Based on the network real-time performance enhancement requirements,a delay-aware NDMANET packet forwarding strategy ADF(Adaptive Delay-based Forwarding)is designed for the mobile characteristics of mobile ad hoc network nodes.By creating the shortest delay path and backup The route selection method reduces the frequency of link interruption in the network,thereby achieving the purpose of enhancing the reliability and real-time performance of the network.At the same time,in order to verify the ADF forwarding strategy,the thesis uses the open source network simulation framework(NS-3)and the named data network simulator(ndn SIM)to design and build a simulation test system and implement the proposed ADF packet forwarding strategy on it.Through a large number of experiments on the simulation platform,the function verification and performance evaluation experiments of the ADF packet forwarding strategy are carried out.The simulation experiment results show that in the named data mobile ad hoc network,the ADF packet forwarding strategy proposed in the thesis is superior to the Listen First,Broad Later(LFBL)forwarding strategy widely used in the industry in terms of request delay and bandwidth usage key performance indicators.With the default flooding(DRF)forwarding strategy.In addition,the overall request success rate of the ADF packet forwarding strategy is about 15% higher than the default flooding strategy.At the same time,the thesis also researched and built a named data mobile self-organizing prototype demonstration and verification system.In this prototype system,the performance of the ADF packet forwarding strategy was tested through real-time file transmission,audio and video live broadcast and other typical time-sensitive applications.The experimental results show that ADF can effectively improve the real-time performance of the named data mobile ad hoc network.Therefore,the ADF forwarding strategy proposed in this thesis can effectively compensate for the lack of real-time performance of mobile ad hoc networks due to network time variability,reduce network overhead,increase request success rate,and meet the real-time requirements of various key applications in complex application scenarios.