An Efficient and Robust Location-Aided Routing Mechanism in Wireless Ad Hoc Networks

Owing to limited bandwidth, how to reduce the control overhead of routing protocols is an important issue in mobile ad hoc networks. In this paper, an Efficient and Robust Location-Aided Route Protocol (ER_LAR) is proposed. The ER_LAR includes Sector-Broadcast Mechanism, Route Maintenance, and Bi-directional Route Repair. Sector-Broadcast Mechanism mainly reduces the communication overhead during the path discovery. According to the Sector-Broadcast Mechanism, the delivery of control packages would not be repeated. As distance between two neighbor nodes on route established becomes large, Route Maintenance can avoid route to disconnect. Besides, we also propose a Bi-directional Route Repair method to reduce the repairing time. The simulation results show that the ER_LAR compares with other algorithms, the number of control overhead packages can be reduced to 50~70%, and successful delivery ratio can be increased by 15%.