A Wireless Sensor Network (WSN) consists of a set of sensor nodes which have a limited energy, processing and memory capabilities. The applications of WSN in some hostile environment make the sensor nodes difficult to replace once their battery resources exhaust. The wireless transmission is the most energy consuming operation and designing an energy efficient routing protocol becomes the main goal for the wireless sensor network. LEACH is considered as the most popular routing protocol which has better performance in saving the energy. However, it has some limits. This paper presents a new variant of LEACH protocol called TV-LEACH that aims extending the lifetime of the network. The simulation results show that the network lifetime in the improved protocol is better than that of the LEACH Protocol.
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