Date Added: Aug 2011
Energy efficient protocol is very important in Wireless Sensor Networks (WSNs) because the nodes in WSNs are usually battery operated sensing devices with limited energy resources and replacing the batteries is usually not an option. Thus energy efficiency is one of the most important issues in WSNs. Routing protocols which only consider energy as their parameter is not efficient. In addition to energy efficiency, using other parameters makes routing protocol more efficient. For different applications, different parameters should be considered. One of the most important parameter is congestion management.