| Mobile Ad Hoc Network is a self-organized network with dynamic topologic structure and free movement of nodes. It has become a topic of general interest to connect several mobile Ad Hoc networks to make a larger network and connect a mobile Ad Hoc network to Internet. Connectivity makes the scale of mobile Ad Hoc network get larger, and every mobile terminal can move freely among sub networks. To maintain the communication between a mobile terminal and another during the course of the movement through sub networks, mobile management has to be applied to trace and manage the location of mobile terminal, which is one of the most important technologies in implementing the connectivity of mobile Ad Hoc network.In this paper, the connectivity and mobile management of mobile Ad Hoc network is studied in the following two aspects. First, based on the analysis of various application environment of mobile Ad Hoc network, two modes of connectivity, that isthe connectivity among mobile Ad Hoc networks and the connectivity of mobile Ad Hoc network to Internet, are structured, and the solving scheme for its implementation and the problems existing is provided. Second, on the base of the above, two connectivity modes, an efficient method of mobile management, including the management of location and hand-off, is given. This method can be suitable to the characters of multi hops and dynamic topology of mobile Ad Hoc network, guarantee the mobile terminal to be detected and traced and the connection with the network when moving freely in the range of the network, and lighten the burden of the network caused by the management data packets. This paper mainly discusses two connectivity modes of mobile Ad Hoc network and mobile management in mobile Ad Hoc network, provides an improved scheme of mobile management based on the analysis of the problems existing in the above mobile management technology, and analyses the performance of the improved scheme in several aspect.
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