Geographic location and delay based integrated routing metric for reliable routing in MANETs

Mobile Ad-hoc Networks (MANETs), a recent emerging technology in wireless networks and routing data poses a challenging issue because of it's random variations in the wireless environment. There are many routing criterias such as hop count, the quality of link, congestion, and interference that help in choosing the best route available in wireless networks. The various random changes in the wireless network cannot be assessed by any one routing parameter to provide us with an optimum route. Integrating multiple metrics and using an amalgamation of these calculated values from multiple parameters provides a better output while estimating the optimum route. In this paper, a geographic location based routing parameter called Dynamic Transport Throughput (DTT) is presented which utilizes geographic location information of nodes and channel usage statistics, thereby improving the routing performance at each hop. The network simulator (ns2) is extended to support the channel usage functionality. The Location Aided Spectrum Aware Routing (LASAR) protocol which uses DTT metric is simulated using this extended version of ns2. Destination-Sequenced Distance-Vector (DSDV), Ad-hoc On-demand Distance Vector (AODV), and Ad-hoc On-demand Multipath Distance Vector (AOMDV) are widely known protocols. Simulation results obtained using LASAR protocol are compared with these protocols. The simulation proves that when the LASAR protocol uses the proposed DTT metric it shows improved results than the current protocols.