ISSN(Online): 2320-9801 ISSN (Print): 2320-9798 International Journal of Innovative Research in Computer and Communication Engineering (An ISO 3297: 2007 Certified Organization) Vol. 3, Issue 3, March 2015 Copyright to IJIRCCE 10.15680/ijircce.2015.0303014 1498 Adaptation Backoff Exponent Mechanism in Zigbee Sensor Network for Improving Throughput Priyanka Deshpande1, Mangala S. Madankar 2 M. E. Student, Department of Computer Science and Engineering, GHRCE, Nagpur, India Assistant Professor, Department of Computer Science and Engineering, GHRCE, Nagpur, India ABSTRACT: Wireless sensor network is an emerging technology which consists of activities like sensing, computing, instrumenting and observing low power sensor nodes. In wireless sensor networks, maintaining the higher throughput is the main concern. Throughput of the network which is obtained from the wireless sensor network is vital issue which must be high which is measured in data packets per second in this context. The network of wireless sensors which is to be considered in this research mainly based on zigbee protocol and IEEE 802.15.4 standard and treated with cluster tree topology which is considered as a most suitable zigbee topology. 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. So we have proposed improved ABE mechanism which uses IEEE 802.15.4 slotted CSMA/CA to obtain the better throughput of zigbee based wireless sensor network. KEYWORDS—Wireless sensor network, Throughput, Zigbee, IEEE 802.15.4 standard, ABE mechanism I. INTRODUCTION There are many advances being made in wireless communication technology in many fields like industry, medical, security, geological military etc. The wireless sensor network is an infrastructure which sense surroundings, transmitting information wireless to other nodes for sharing collaborative tasks. It composed of activities like sensing, computing and communication elements. Recent advancement in this field has provided with standards such as IEEE 802.15.4 and Zigbee, which provides a platform for many commercial applications. Sensor nodes are the essential building blocks in sensor network. Sensors in a wireless sensor network have a variety of purposes, functions and capabilities. Throughput plays very important role in WSN, as if we obtain higher throughput, the performance of the network will automatically get increased. ZigBee [1] is the standard based wireless technology, which is built on the top of IEEE 802.15.4 standard. Zigbee is very easy to implement and needs little power to operate. Zigbee has defined rate of 250kb/s, which is best suitable for periodic data routing. There are various advantages of Zigbee which are Low cost, reliable and self healing, easy to implement and Deploy, Standard based. There are mainly three logical devices of zigbee which are Zigbee Coordinator, Zigbee Router and Zigbee End devices which are as follows: 1. Co-ordinator (ZC): Co-ordinator is the root of the network. It is the top level device of zigbee network who initiates the network formation by assigning special identification called personal area network identification (PAN ID). It may act as a router once network is formed. 2. Zigbee Router (ZR): It is the second level device of zigbee devices. It may associate with Zigbee coordinator or with previously associated ZR. It transmits and receives the data as well as to work as intermediate device where it has routing capability by receiving and retransmitting the packets to nominal paths.