Research And Application Of Multiple AD Hoc Network Interconnection Technology

AD Hoc network has been widely used in military communication,temporary communication in disaster areas and communication in remote areas.Due to the limitations of AD Hoc network protocol and AD Hoc device performance,AD Hoc network was not able to cope with the bottleneck of multi-hop between AD Hoc nodes when the scale of AD Hoc network increased.Therefore,AD Hoc network presented the characteristics of small scale and scattered distribution.In the actual network deployment,different AD Hoc networks need to be connected to meet the needs of networking,routing,traffic scheduling and service quality of a larger AD Hoc network.The existing scheme of multi AD Hoc networks usually adopted the integration of AD Hoc LAN and WAN.Through the integration of WAN,AD Hoc network nodes can be divided into different AD Hoc network areas according to their current location to finished local AD Hoc network construction,and then through the integration of WAN to completed the interconnection of multi AD Hoc network.And realized the integration of multi AD Hoc network and deployment.This thesis focuses on the route optimization problem in the converged network.The main research work is as follows:(1)Analyze the routing table compression optimization algorithms,including hardware device compression and software algorithm compression.Analyze its compression principle and its impact on routing behavior.One solution for sharing routing tables in the converged network is proposed.(2)Analyze the multi-path routing methods in AD Hoc network,including alternate routing technology and on-demand discovery technology.It is proposed that one dynamic multipath routing solution which uses congestion degree to realize concurrent multipath interconnection between local AD hoc networks and external wide area networks.(3)Analyze BGP's operation principle and key parameter settings.Analyze OLSR's operation principle,packet format and data storage information.Design the OLSR-BGP interconnection optimization scheme to optimize the AD Hoc network and WAN convergence networking in two levels.The first layer only optimizes the protocol of the border router.It can improves the ability of the AD Hoc network to handle congestion traffic.The second layer implements multipath routing to the external WAN by optimizing the protocol of the entire AD Hoc network device.(4)Use OPNET simulation software to simulate the fusion network optimization scheme.Compare the performance of the scheme in the case of network congestion,and compare the effects with other multipath routing protocols to evaluate the scheme.Through the comparison of simulation experiments,the fusion networking optimization scheme designed in this thesis has better performance than the existing routing table compression algorithms such as ORTC and multipath routing protocols in the scale control of internal ad-hoc network equipment routing table and the congestion management of boundary routers.