Techniques improving throughput of wireless sensor network: A survey In wireless sensor networks, maintaining the higher throughput is the main concern. Wireless senor networks are basically formed with a few powerful base stations and a large number of resource-constrained sensor nodes. The wireless sensor network composed of n number of sensors or nodes, where each and every node is connected to one or several nodes or sensors. For providing low data rate for short coverage and long battery life, zigbee is used in wireless sensors network and ultimatelyzigbee nodes are used in wireless sensor network which are called as zigbee sensor nodes. Wireless sensor nodes of zigbee system basically build on two aspects of protocol stack that are IEEE 802.15.4 standard and zigbee protocol. The problem that sensors usually face in wireless sensor network is that when data packets are transferred from one node to another node, the throughput of the wireless sensor network decreases because of packet collisions and high network traffic. In order to overcome this problem, various methods have been discussed to improve the throughput.