Abstract
MANET(Mobile Ad Hoc Network) is the composite technology of mutual wireless connections of nodes in mobile networks. In AODV(Ad hoc On-demand Distance Vector) Routing, all the nodes have to receive route request messages, and rebroadcast the route request messages for others. It causes a lot of network traffic overheads. In this study, we propose a belt-zone selection method for decreasing the number of RREQ messages. All nodes that receive the RREQ message don't rebroadcast, but only the nodes within a selected zone rebroadcast it for setting a routing path. The belt-zone a logical concentric area is decided by the signal strength from RREQ sender. We also provide an efficient belt-zone selecting sequence by simulations. In high density networks, an intermediate area within several logical concentric areas from the sender must be selected as the primary area. But, in low density networks, the far area from the sender is better to be selected as the primary belt-zone area. By applying the proposed belt-zone mechanism to AODV networks, a lot of control messages can be decreased on various load situations.
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