Energy consumption analysis of flow-specific medium access and the role of probabilistic preamble sampling in energy and delay performance

In this paper, we present a novel energy consumption analysis of the flow-specific Cooperative Wireless Sensor Network Medium Access Control (CWS-MAC) protocol utilizing a nine-state radio energy model that includes both steady state and transient state energy consumption behavior. CWS-MAC is a traffic-adaptive, energy-efficient medium access scheme that has been shown in the literature to outperform both traditional contention and non-contention-based approaches by providing medium access service on a per flow basis. We also formally define and quantitatively investigate the technique of probabilistic preamble sampling which provides the ability to trade-off delay performance and energy consumption in the operation of low-power medium access schemes.