Abstract
The mobility models are used to represent the unpredictable movement pattern of the nodes in Mobile Adhoc Network (MANET) and give us an idea regarding their location, velocity and acceleration change over time. These models are used for simulation purpose in standard software tools such as QualNet, ns-2 etc. This paper evaluates the performance of routing protocols for mobility models such as Random Way Point (RWP), Random Walk (RW) and Random Direction (RD) in presence of obstacles like mountain which restricts node movement as well obstruct transmission path between nodes based on a parameter termed as Probability of Reachability (POR). The POR is defined as the fraction of reachable routes to all possible routes between all pairs of sources and destinations. For this purpose a simulator is designed in MATLAB. We observe a marked difference in value of POR in presence of obstacles as well as variation in number of obstacles.
Highlights
Mobile Adhoc Network (MANET) [1] is formed by the set of mobile nodes that are connected via wireless links without using any fixed infrastructure
This paper studies the impact of mobility models such as Random Way Point (RWP), Random Walk (RW) and Random Direction (RD) under the presence of obstacles on reachability of routing protocols
It can be observed from the graph that as the transmission range increases the value of Probability of Reachability (POR) increases
Summary
MANET [1] is formed by the set of mobile nodes that are connected via wireless links without using any fixed infrastructure. The unpredictable behaviour of nodes in MANET results in their random organization which alters the topology of the network rapidly and unpredictably This unpredictable movement pattern of nodes is presented by various researchers by presenting an idea regarding their location, velocity and acceleration change over time and is termed as mobility model [3] [4]. A variety of mobility models have been proposed for MANET [5, 6, 7, 8, 9, 10], and a survey of many is presented in [3, 4, 11] These models vary widely in their movement characteristics. The paper has been organized as follows: Section 2 provides the literature survey on mobility models used in our simulation, section 3 provides the simulator design and experimental setup parameters and section 4 describes the simulation and results followed by concluding remarks
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