On queueing delay in WSN with energy saving mechanism based on queued wake up

The time-dependent queueing delay in wireless sen-sor network (WSN) with node radios being activated via the queued wake up mechanism is considered. The mathematical model of the system is based on the transient M/G/1/K-type queue with finite buffer and the N-policy, in which the server becomes active after the idle period if the fixed number N of packets are accumulated in the buffer queue. The closed-form representation for the Laplace transform of the queueing delay distribution at fixed time epoch is found. The approach is based on the idea of embedded Markov chain, total probability law, renewal theory and linear algebra. A numerical example is attached as well.