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MANET : An Effective Gateway Discovery by Using Link Lifetime

Mobile ad hoc networks (MANETs) connected to the Internet requires a gateway to operate. The gateway is responsible for providing the configuration parameters to the nodes by means of message exchanges. As MANET nodes move freely, these messages are generated at the beginning of the connections, when the route to the gateway breaks or when the gateway proactively sends them. The Integration of the MANETs and infrastructure networks such as Internet, known as heterogeneous network, extends the network coverage and increases the application domain of the MANET. The ad hoc routing protocol AODV is extended and used to achieve interconnection between a MANET and the Internet. In the existing approaches of gateway discovery either interface queue length or the minimum hop metric criteria or a combination is used for selecting the gateway by the mobile nodes. But in this paper we have proposed an efficient reactive gateway discovery algorithm is devised that takes into account the length of the routing queue in addition to the minimum hop count metric for selecting an efficient gateway and also selecting the routes to other mobile nodes as well as it also selects the stable node by using the properties of link lifetime.