Study On The Capacity And Reliability In Wireless Mesh Network

The network designers pay attention to the capacity and reliability of wireless network. How to improve the capacity of network and guarantee the reliability of the network in condition of limited wireless resource is research focus of wireless network. Wireless Mesh network have good characteristics,such as interconnection of structure, high capacity, high flexibility, high reliability and so on. It becomes the development direction in the next generation of wireless network. This paper is based on the state 863 project of"hierarchical topology control broadband wireless networking " .In order to design a large capacity networking, this article advanced a structure of virtual hierarchic wireless Mesh network ,and the structure of regular topology ascend the network capacity and reliability.This paper based on this network architecture research its network capacity and reliability, through the theoretical analysis and the simulation calculation, proved that the network architecture has a good performance index.Throughout analysis of wireless Mesh network topology, the paper proposes a kind of virtual hierarchic topology that ensure the capacity and reliability of network. The virtual node is the scope of the node in this structure. It can simplify network control and management and improve the performance of network. This structure adopting regular topology improved the capacity of network. In order to prove the excellent characteristics of this structure, this paper carried analysis the capacity and reliability of network.In order to analysis the capacity of wireless Mesh network, the first step is to set up a capacity model of wireless network. The second is to analyze the capacity of the random and regular topology network. Through the analysis of the capacity of the two kinds of topology obtained the bounds. Compared capacity of network in different kinds of topology, this paper got the simulation figure of capacity in two different topologies under a certain network environment. It proved that the regular topology ascend the capacity of network under certain conditions. Considering the load of network, the "cellular" increase the capacity of network. Simulation results proved that this kind of mode was effective.Using a task reliability model is to analyze the reliability of virtual hierarchical structure in Mesh networks. Based on design of network reliability, the network cost model and reliability evaluation model were established. The reliability of node and edge was calculated separately, the reliability parameters of network were obtained. Simulation proved that the structure of hierarchical network can improve the reliability of node and link.Finally, this paper summarized the content, and analyzed the structure of network and good performance and shortcomings. The last prospected for the future development direction.