Efficient data delivery in mobility aware ZigBee wireless networks

ZigBee is a wireless communication technology which provides self-organized, multi-hop and reliable networking facility with long battery lifetime. ZigBee provides wireless networking between low power devices, aimed to reduce the energy consumption and delay. ZigBee technology is deployed in numerous applications such as home based healthcare, medical monitoring and consumer electronics. In many of the envisioned applications, device mobility is unavoidable. Thus it is necessary to provide connections to/from mobile devices in many ZigBee applications. In ZigBee networks, a tree topology is used for data delivery applications. But data delivery failure occurs in ZigBee wireless applications due to mobility and network topology changes. So, to locate the displaced mobile end devices, the conventional route reconstruction method is used to lessen the effects of mobility. But the conventional route reconstruction method consumes large amount of resources in terms of bandwidth and power consumption. Recently ZigBee node deployment and tree construction framework is proposed to avoid such resource consumption and provides efficient data transmission between coordinator and mobile end devices. The framework considers the regularity in mobility patterns during the construction of the routing tree and deployment of nodes. Admission control concept is then introduced to improve the network throughput which increases the transmission rate i.e. the rate of flow when there is no data loss in the flow. Transmission rate is managed based on network traffic. Data delivery ratio is increased efficiently during downlink communication i.e. between coordinator and mobile end device by using node deployment framework, rather than using conventional route reconstruction method.