Internet gateway discovery and selection scheme in Mobile Ad Hoc Network

Internet gateways are used to access the Internet services from the Mobile Ad Hoc Network (MANET). Internet gateways need to be discovered and selected in an appropriate way to deliver more packets to the Internet and reduce end-to-end delay. Existing gateway discovery schemes do not scale well with the number of nodes, traffic load, and speed of the nodes in MANET. To make it scalable, we proposed a new gateway discovery and selection scheme. In our scheme, the gateways advertise gateway advertisement messages only on-demand. Moreover, it contains the advertisements within a limit in order to make our scheme scalable. We considered the interface queue length and the total number of neighbors along a route in addition to the hop count to bypass the loaded and dense route to the gateways in order to reduce the delay and packet loss. Simulation results show that our scheme scales well compared to that of other schemes.