Date Added: Jan 2011
This paper presents an algorithm for maximizing the lifetime of a sensor network while guaranteeing an upper bound on the end-to-end delay. The authors prove that the proposed algorithm is optimal, and that it requires simple computing operations that can be implemented by simple devices. To the best of their knowledge, this is the first paper to propose a sensor wake-up frequency that depends on the sensor's location in the routing paths. Using simulations, they show that the proposed algorithm significantly increases the lifetime of the network, while guaranteeing a maximum on the end-to-end delay.