The Reseach On Topology Forming Technology In Ad-hoc Networks

Mobile Ad hoc network is a special multi-hop wireless network without centralized administration and infrastructure. Due to its importance in different fields, mobile Ad hoc network has attracted heavy attentions of the researchers all over the world in recent years. The special network structure is different from WLAN and cellular networks. Ad hoc network has no center control point, and the importance of every nodes in the network is equal. The network is self-managed, self-organized, and the packets are delivered in the network by mutual transfer.Network topology is an important model of network state. It gives the diagram of a large quantity of active nodes and their links in the networks. Network topology is one of the basic functions of network management. The topology of wireless ad hoc networks can accomplish many administration works, such as configuration of wireless ad hoc networks, setting the operation parameters of networks, monitoring the network status, predicting the network status, designing and updating the wireless ad hoc networks.The main study in this paper includes:1,The structure and the characteristics of the ad hoc networks are analyzed. An algorithm based on the neighbor node information of Hello message of dynamic source routing(DSR) protocol is given.2,The network simulation software NS2 is used to analyze the performance of the proposed topology discovery algorithms.3,Based on the geography information system(GIS), the simultaneous display of the network topology on electronic maps are realised.