International Journal of Computer Science and Mobile Computing (IJCSMC)
Wireless sensor network contain hundreds of sensor nodes. These sensor nodes uses radio signal using communication. A wireless sensor node is well found with radio transceiver, sensor device and power component. A wireless sensor network is made up of sensor, embedded techniques and distributed information mechanism. Wireless sensor network is much versatile as compared to traditional wireless network. In this paper, there is a complete study of WSN with their routing protocols. Now, as the quality of service is important consideration for any network so also discussed quality of service with challenges for WSN.