A study on wireless sensor networks & designs
Syda Nahida, Sayeed Yasin, Kurra Rajasekhara Rao · EXCEL International Journal of Multidisciplinary Management Studies · 2013
In wireless sensor network, we have large number of sensor nodes. The main task of a sensor node in a sensor network is to detect events, perform data processing within the network, and then transmit the data. Wireless sensor node has limited power source and the replacement of power source might be impossible. Energy efficiency is one of the important issues in wireless sensor networks. We can increase the energy efficiency by using MAC protocols. S-MAC protocol reduces the listen time by letting node go into periodic sleep mode. For collision avoidance S-MAC follows virtual carrier sense, physical carrier sense and RTS/CTS mechanism.