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A “mobile ad hoc network” (MANET) is an autonomous system of mobile routers (and associated hosts) connected by wireless links, the union of which forms an arbitrary graph. The routers are free to move randomly and organize themselves arbitrarily; thus, the network’s wireless topology may be changed change rapidly and unpredictably. The changing state of the topology makes MANET ideal for emergency and rescue situation. Wireless ad-hoc networks will enable emergency services to continuously overview and act upon the actual status of the situation by retrieving and exchanging up-to-date detailed information between the rescue parties. Deployment of high-bandwidth, robust, self-organizing ad-hoc networks will enable quicker response to typical what/where/when questions, than the more vulnerable low-bandwidth communication networks currently in use. This paper addresses two proposal studies for constructing a net emergency system using ad hoc, with perspective, these studies take in consider to minimize the control overhead for route/location discovery by doing selective forwarding where only a few selected nodes in the network do the broadcasting, it is assumed that the mobile nodes can discern their relative positions with respect to other nodes in the range of communication. Using a real urban area being set for the emergency state, NS2 simulator has been used.

Keywords

Ad-hoc Networks, Rout Discovery, Request Zone, Mobile Node (MN).

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