Implementation of modified OLSR protocol in AANETs for UDP and TCP environment

Abstract Airborne Ad-hoc Networks (AANETs) are becoming highly popular nowadays. Due to the fast movements of aircraft, there are frequent topology updates which result into a link break between two communicating aircraft. The routing overhead increases multiple times in search of a new route continuously. To deal with this issue of increased overhead, this paper presents a new routing scheme named as Airborne-OLSR (AOLSR). The proposed scheme provides more optimization of Multi-point Relay (MPR) selection criteria used in existing Optimized Link State Routing (OLSR) protocol. This decreases the amount of overhead by selecting the MPR either on the right side or the left side of the source node which depends on the location of the node to which data is to be sent. The decrease in overhead will also result into more bandwidth availability which decreases the possibility of link break. The proposed routing scheme has been compared with the existing OLSR protocol for UDP and TCP environment with varying node speed in 3-D Gauss Markov Mobility model using network simulator-3(ns-3). The simulation analysis shows that the proposed scheme is better in terms of packet delivery ratio, End-to-End delay, routing overhead and throughput as compared to OLSR. We have also compared the AOLSR with previously developed AANET specific protocols like automatic dependent surveillance-broadcast system aided geographic routing protocol(A-GR) and geographic routing protocol for aircraft ad hoc network (GRAA).

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