Energy conserving design is the research focus to prolong the lifetime of sensor networks. A simple and effective way to save energy is to place nodes in sleep mode, however, sleep mode corresponds to low power consumption as well as to reduced operation capacity and increased latency. We derive a queuing model for the sensor node and performance models for the whole sensor network. We use our models to study the node and network performance metrics in terms of throughput, energy consumption and packet delivery delay. Our analytical models enable us to explore the trade-off existing between sensor sleep/active dynamics and those performance metrics. We validate our analytical results through extensive simulations and simulation results match well with our analysis and show the accuracy of our framework.
['Jianming Liu', 'Tony-Tong Lee']
A framework for performance modeling of wireless sensor networks