Adaptive gateway discovery scheme for connecting mobile ad hoc networks to the Internet

Mobile ad hoc networks are autonomous, infrastructureless networks that can establish low cost, limited range networks for the purpose of sharing data between devices. When an ad hoc network is connected to the Internet, it is important for the mobile nodes to detect available gateways providing access to the Internet. Therefore, a gateway discovery mechanism is required. In this paper, we present an adaptive gateway discovery scheme that can change TTL value of agent advertisements according the scale of Internetworking ad hoc networks dynamically. Simulation results with NS2 shows that our approach achieves good connectivity while keeping overhead costs low when connecting various scale ad hoc network to the Internet.