International Journal of Engineering Trends and Technology
Wireless Sensor Networks (WSN) is the collection of many small size low cost, battery operated sensor nodes distributed over the targeted region to collect the information of interest. The authors can say these networks can be a fruitful solution for many applications such as target tracking, intrusion detection etc. Whenever they are talking about MAC layer protocols they need to give stress on energy efficiency factor. There are few other issues like high throughput and delay. In the early development stages, designers were mostly concerned with energy efficiency because sensor nodes are usually limited in power supply.