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 ultimately zigbee 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.
Index Terms-IEEE 802.15.4 standard, Throughput, Wireless sensor network, Zigbee protocol Stack
Experimental laboratories in technical institute are important part of the education areas. It demonstrates course concepts and brings theoretical ideas alive so students can more visualize and understand facts of theoretical concepts. Natural phenomenon affects the real world measurement and control the working algorithm.However, equipping a laboratory ubiquitously is an effective in cost and its maintenance can be difficult. Teaching assistants are required to instruct and setting up the well equipped laboratory, and grade the student report. These time-consuming and costly tasks turns in relatively low equipped laboratory also when teaching assistants and laboratory equipment are available experiments can be driven out.A lightweight web server as well as website interface has been developed, which restricts cost efficient laboratory equipment and measures electronic devices as "virtual laboratory" for any technical institute experiments to undergraduate as well as post graduate students. It uses standard browsers without additional plug-ins to provide interface to any user. The present interface is flexible and could be expanded to many other devices and instruments.
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