An energy saving and latency delay efficiency scheme for wireless sensor networks based on GSPNs

In order to prolong the lifetime of wireless sensor networks, we have to optimize the energy consumption at the sensor nodes. Thereby, most research works have focused on how to increase the duration of sleeping states of sensor nodes using various wakeup strategies. In this paper, we propose to model the sleep/wakeup pattern of networked nodes with different vacation policies using the Generalized Stochastic Petri Nets formalism. To this end, we apply firstly the N-policy as queued wakeup scheme. Then we propose a new vacation policy that we call the Hybrid-policy to minimize the latency. Based on the obtained models, we give the formulas of the main performance measures of the sensor network. Finally, we give a detailed analysis to show the impact of the two vacation policies on the network performances.