Abstract:
Global connectivity to Mobile Ad Hoc Network (MANET) is necessary to access the
Internet services from the MANET. Nodes in a MANET that connect it to the Internet are
called Internet gateways. 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.
Currently, there are proactive, reactive, and hybrid schemes to discover and select
Internet gateways in MANET. However, these 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 also
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
with the number of nodes, traffic load and the speed of the nodes in MAENT compared
to that of other schemes. It also confirms that our scheme has less delay and packets drop
than that of other schemes.
