An Investigation on Mobility Influence on MAC Protocols of Wireless Sensor Networks

Abstract— The collection of sensor nodes, which form a dynamic and arbitrary network by connecting on a wireless medium is called wireless sensor networks. This definition implicitly describes that links may appear or disappear at any time because of node mobility & other factors. The communication is completely dependent on the nodes (source and destination) of network. For a network to work efficiently various protocols for routing have been developed. These protocols provide the path among distant nodes via multi-hop links to improve network efficiency. The Protocols’ performance affected by the various factors, such as mobility of nodes, varying network size, bandwidth and power consumption of node. This paper describes comparative analysis of protocols with reactive routing such as (AODV, DSR and DYMO) used in day-to-day scenario, under the Influence of different mobility models: like File, Group Mobility and Random-Way Point Model. The differentials of performance are investigated by altering the number of nodes and different mobility models, depending on the simulation results, how the efficiency of each protocol can be improved is also recommended. By using simulator we simulates throughput, average jitter packet delivery ratio and average end to end delay, in network layer hop count and RTS, CTS and ACK in MAC of protocols. For the above parameters simulation is performed with QualNet 5.0 simulator. The results show expressively noticeable Influence of mobility models on performance of routing protocols.

Keywords— Wireless networks, AODV, CBR, DYMO, DSR

I. INTRODUCTION

The usage of mobile devices like laptops and mobile phones in everyday life is heading to opportunities for unstructured and adhoc wireless communication. These devices have a fundamental ability to share information. Access points are not needed as each node can act as a router as well as node at the same time [1]. These mobile nodes/routers can join and leave the network as per own wish. Each node finds route-by-route request. Routing protocol plays a significant role for sending data from the source to the destination that finds optimal path among two communication nodes. Every protocol has its own rules to find the route or maintenance the route. There are many routing protocol proposed by researchers [2] [3].
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