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Analysis of Topological Influence in Air Interface Characterization of Superimposed Cluster Architectures for WSNs
José Javier Astrain, Leire Azpilicueta, Francisco Falcone and Jesús Villadangos

Cluster architectures are applied to resolve different networking problems like data broadcasting, data aggregation, routing and others. In this paper we analyze a practical scenario where superimposed cluster architectures are formed with commercial ZigBee sensor motes. Interference levels are analyzed by simulation and validated by measuring the interference for data transmission experiments involving superimposed clusters formed with commercial sensors. Both radio channel simulations and real sensor measurements agree in pointing out the dependence of the network topology. A higher outage probability is observed when the interference levels increase, leading to non-optimal system behavior and hence, topological considerations are necessary in order to optimize the overall performance of the system. This solution could be used for deployment of wireless sensors in transportation such as railroad or subway systems, home and building automation, among others.

Keywords: Wireless Sensor Networks, Clustered Architectures, Energy-aware routing, Air Interface Characterization, 3D Ray Launching Deterministic Calculation, Complex Indoor Scenario.

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