QoS Aware Routing Protocol to Improve Packet Transmission in Shadow-Fading Environment for Mobile Ad Hoc Networks

T. Sangeetha, K. K. Venkatesh Venkatesh, Rajesh  , M. S. K. Manikandan

Department of Electronics and Communication Engineering, Madurai, India SACS MAVMM Engineering College, Madurai, India.
Department of Electronics and Communication Engineering, Madurai, India Thiagarajar College of Engineering, Madurai, India.

DOI: 10.4236/cn.2013.53B2110                

Abstract

In Shadow-Fading model, it is difficult to achieve higher Packet Delivery Ratio (PDR) due to the effects of large scale fading. The main goal of this paper is to improve the PDR in Shadow-Fading environment. To achieve this objective a protocol has been proposed that discovers backup routes for active sessions. These backup routes salvage the packets of active session in case of active route failure. It is found by research that proactively maintaining backup routes for ac-tive sessions can noticeably improve the PDR in Shadow-Fading environment. This protocol has been implemented with a mechanism of having backup routes and simulations have been conducted by using both node disjoint paths and link disjoint paths. Comparisons have been made between new protocol as well as AODV protocol. Simulation has been carried out using Network Simulator 2 (NS2) and the results show that the proposed QoSAR protocol exhibits higher PDR than AODV protocol in Shadow-fading environment.

Keywords

Shadow-Fading Model; Adhoc On Demand Distance Vector Routing (AODV); Backup Routes; Node Disjoint Paths; Link Disjoint Paths; Packet Delivery Ratio (PDR); Quality of Service Aware Routing (QoSAR)

Conflicts of Interest

The authors declare no conflicts of interest.

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