Hidden Nodes of Wireless Sensor Networks: Analysis and Avoidance
نویسندگان
چکیده
This paper propose an access method for wireless sensor networks. It reduces collisions due to hidden nodes, a source of significant energy dissipation. Our access method operates similarly to SMAC by alternating sleeping and active periods, but it does not use RTS/CTS. We analyze the hidden node problem to derive expressions for the number of hidden nodes and the probability of collisions. We avoid it with adjusts the contention window so that the probability of collisions due to hidden nodes becomes egligible. We show the numerical results for different low power radios and validate our access method through simulation.
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