Wireless sensors network and acknowledgement technique based ZigBee system

The attractive features of wireless sensors based ZigBee and IEEE 802.15.4 standard such low cost, flexibility, scalability, and multiple usages contribute to spread it in many trends. The network of wireless sensors which is to be considered in this research deals with fixed and mobile wireless sensors and treated with mesh and tree topologies. This paper takes up the effect of Acknowledgement technique to search for better throughput and end to end delay of wireless sensors network. The results show that the acknowledgement technique has different effects on the performance of the network depending on the type of topology and state of sensors (fixed or mobile). The usage of Acknowledgement gives better performance in terms of throughput and end to end delay for tree topology with mobile stations, and mesh topology with fixed stations.