Research On Reliable MANET Multicast Routing Protocol For Network Situation Awareness

The wireless self-organizing network,or MANET,is a network that does not require the support of basic communication facilities,and the nodes in the network form a network by themselves,and forward data through intermediate nodes.Compared with traditional wireless cellular networks,MANET's networking mode is more flexible,but it has disadvantages such as limited bandwidth,weak real-time performance,and insufficient link stability.In this paper,combining predecessor research results and the characteristics of situational awareness of wireless network application scenarios,starting from the network coding and network topology dynamic analysis,the CP-MAODV routing protocol is proposed and implemented by simulation.The main work is as follows:(1)This article focuses on the improvement of the MAODV routing protocol from the network coding strategy,mobile prediction method,network topology situation analysis and auxiliary link construction program,so the relevant basic theories are mainly developed from the above aspects.Firstly,it analyzes the advantages and disadvantages of typical multicast routing protocols and their adaptive mechanisms for network dynamics,so as to pave the way for further theoretical research and improvement.The link prediction part studies the current main prediction methods and analyzes their advantages and disadvantages to determine the link prediction method in this article.The network coding part focuses on analyzing the advantages,main methods and applications of network coding in routing protocols.(2)Aiming at the shortcomings of MAODV routing protocol that link breaks in a dynamic network are prone to cause data loss and data flow is concentrated in the multicast tree,which can easily cause network congestion,this paper proposes a reliable MANET multicast routing protocol based on network situation awareness.CP-MAODV.In terms of data transmission,the protocol selects nodes with coding opportunities to encode relevant information,reduces the number of multicast data transmissions,reduces network overhead,and reduces the probability of network disconnection compared to traditional transmission methods;In terms of broadcast topology,an auxiliary link is established on the basis of the MAODV multicast tree through movement prediction and network topology analysis to improve the robustness of the protocol.On the premise of rational use of network resources,the probability and delay of link disconnection are reduced,routing efficiency is improved,and the reliability of multicast is enhanced.(3)For the proposed CP-MAODV protocol,the system architecture and business process of the wireless network CP-MAODV simulation system were designed and implemented on the OPNET simulation platform,and the performance of the CPMAODV protocol was tested and analyzed in different scenarios.It mainly reflects the network performance of the CP-MAODV routing protocol by selecting the three performance indicators of successful packet delivery rate,throughput(bit/s)and delay(s).The simulation results show that,compared with the MAODV protocol and the MAODVAL protocol,the CP-MAODV routing protocol proposed in this paper has improved in terms of delay,throughput,and successful packet delivery rate,and has certain theoretical and application value.