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Wireless Ad Hoc and Sensor Networks

Wireless Ad Hoc and Sensor Networks

Wireless Ad Hoc and Sensor Networks

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414 <strong>Wireless</strong> <strong>Ad</strong> <strong>Hoc</strong> <strong>and</strong> <strong>Sensor</strong> <strong>Networks</strong>80007000Collision vs network sizeoedsroedr6000# of collisions500040003000200040 50 60 70 80 90Number of nodes100 110FIGURE 8.48Number of collisions with network size.being sent in the network. Because of increased traffic in the network, thenumber of collisions in the network increases significantly.8.10 OEDSR ImplementationEnergy-efficient network protocols are an integral part of constructing apractical WSN for deployment (Regatte <strong>and</strong> Jagannathan 2005). Implementationissues that are not always addressed in simulation constrainthe type of protocols <strong>and</strong> hardware that can be deployed. Processingcapabilities, on-board battery capacity, <strong>and</strong> sensor interfacing all becomeconstraints that must be weighed during the design of the hardwarecomponents.Implementations of WSN protocols are traditionally evaluatedthrough the use of network simulators such as NS2, OPNET, <strong>and</strong> Glo-MoSim (Fonda et al. 2006). Simulations allow for establishment of theperformance of a particular protocol against others. However, simulationslack the ability to evaluate the protocol against hardware constraints.In this work, hardware implementation is shown for the OEDSRprotocol (Ratnaraj et al. 2006). The OEDSR is used in WSN to provide

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