Date Added: Aug 2009
In wireless sensor networks, the simplified and energy efficient protocol should be designed in order to maximize the network lifetime because of its stringent resource constraints, ultra power limitation, and tiny embedded devices. In this paper, the authors propose an enhanced cross-layer protocol for energy efficiency in wireless sensor networks by integrating medium access control and routing protocol. Their proposed protocol utilizes a synchronous medium access control scheme by using the adaptive duty cycling technique to improve energy efficiency and solve long end-to-end delay problem. They also design a tree-based energy aware routing algorithm to prolong the network lifetime in their protocol. Simulation results show that the proposed protocol outperforms other existing algorithms in terms of energy efficiency and latency.