Abstract
Internet gateways are used for integration of mobile ad hoc network (MANET) with Internet to increase its usability. Mobile nodes in MANET need to discover an Internet gateway to obtain Internet connectivity. Existing gateway discovery approaches such as reactive, proactive, and hybrid suffer from low network throughput and performance trade-off. In the proposed gateway discovery scheme, proxy nodes are utilized to reduce network overhead as well as dynamically adjust proactive area of gateways according to traffic load on a gateway. The gateway selection scheme uses a timestamp factor besides hop count and queue length for selecting an optimal Internet gateway. The performance of the proposed approach is analyzed through simulation on the basis of routing overhead and gateway discovery time. Results show that our approach has been found outperforming to existing approaches.
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