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—In Mobile Ad Hoc Networks with the wide area and high node density, the impacts on the network performance due to physical layer impairments over wireless interconnecting transmission paths are very serious. These effects are the cause of the decrease of the network performance. In this paper, we focused on investigating the routing techniques in mobile ad hoc networks taking into account the physical layer impairments. Thence, we proposed an improved route discovery algorithm for AODV protocol based on the cross-layer model in combination with the agent technology, namely QTA-AODV (Quality of Transmission using Agent in AODV). The objective of QTAAODV algorithm is to improve the quality of transmission of the data transmission routes, increase the network performance. The simulated results on OMNeT++ have shown that, compared with AODV algorithm, QTA-AODV can improve the signal to noise ratio of the routes, reduce from 20% to 35% of packet blocking probability. In addition, QTA-AODV algorithm also reduces the number of the control packets.

QTA-AODV: An Improved Routing Algorithm to Guarantee Quality of Transmission for Mobile Ad Hoc Networks Using Cross-Layer Model