Research On Coverage Model Of Wireless Ad Hoc Networks

There are two important problems for research and application of the Ad Hoc networks. The one is to establish the coverage model of target area, and another is to quantify the connectivity, stability, energy consumption and communication quality assessment. These two core problems are researched in this paper.In the first chapter, the history and characteristics of the Ad Hoc networks are introduced firstly. Then we focus on the basic concepts and the main problems on the topology control of Ad Hoc networks. Subsequently, the coverage optimization model of the Ad Hoc network has been proposed, which are based on the finite covering theorem and circle overlap rate. The model can reach K-coverage by adjusting overlap ratio of the circumference, and computer simulation methods have verified the correctness of the model.In the third chapter, we mainly focus on the performance problems of Ad Hoc networks based on coverage optimization model. For network survivability performance, we firstly analyze the connectivity probability of network, and then simulation method which base on probability model are used. Then the channel allocation scheme of Ad Hoc networks is proposed by means of Four-Color theorem. Taking into account the mobility of the nodes in the networks, mobile stability of the networks are simulated, under some reasonable assumptions. Lastly, energy consumption and communication quality assessment of coverage optimization model in the second chapter are analyzed and simulated.Because there are some impractical assumption for nodes and target area, two improved models are researched in the fourth chapter. Firstly, the improved model for the target area with obstacles and heterogeneous sensor nodes is studied, and the nodes deployment and channel allocation scheme are proposed for the new model. Secondly, we study the target area coverage problem from the view of nodes cluster coverage. Similar methods are used to research channel allocation and survivability performance of network in this situation.Finally we summed up the achievements and contributions of this paper, and further research problems are pointed out.