Energy efficient multilayer protocol for wireless sensor networks

In wireless sensor networks (WSN), extensive life span requirement for diverse application and inadequate energy storage ability of sensor nodes has led to the discovery of a new field for reducing the power consumed by nodes. To increase the sensor node´s life period, protocols have to be energy efficient so as to reduce energy consumption in each layer mainly physical layer (power consumption control), MAC layer (retransmission control) and network layer (routing protocol). In this paper, we explore various protocols in MAC layer, and Network layer to provide an energy efficient network.