Science Publishing Group
Wireless Sensor Network (WSN) consists of hundreds and even thousands of tiny devices called sensor nodes distributed autonomously to monitor physical or environmental conditions such as temperature, sound, vibration, pressure and motion at different locations. Energy plays an important role in wireless sensor networks because nodes are battery operated. This paper presents a new version of leach protocol called \"ED-LEACH\" which aims to conserve energy considering BS distance and central distance of cluster by the passage of time. Compared to leach protocol, ED-LEACH has more longevity.