A cost effective ZigBee based wireless mine supervising system with voice over ZigBee (VoZ) is presented here. Here we design a smart helmet, which enable the helmet as a mobile sensor node of ZigBee wireless sensor networks, gathering parameters the temperature, humidity and illumination level of underground environment and will alert the central management unit in case of abnormal condition. ...

ZigBee is a fairly new but promising wireless sensor network standard that offers the advantages of simple and low resource communication. Nevertheless, security is of great concern to ZigBee, and enhancements are prescribed in the latest ZigBee specification: ZigBee-2007. In this technical report, we identify an important gap in the specification on key updates, and present a methodology for d...

In this paper, we develop wireless optical monitoring system using ZigBee network and Fiber Bragg Grating (FBG) sensor. FBG sensors are manufactured using the 248nm excimer laser and phase masks. The adopted wireless networking between PC and FBG interrogator is ZigBee, because ZigBee is a specification for a suite of high level communication protocols using small, low-power digital radios base...

With the rapid development of wireless technologies, it is possible for Chinese automatic meter reading system (AMRS) to be equipped with wireless sensor networks due to their low-cost, simplicity and mobility. In the current study, we compared the advantages of ZigBee with other two similar wireless networking protocols, Wi-Fi and Bluetooth, and proposed a wireless solution for AMRS based on Z...

Public Addressing System (PA) is an electronic sound and amplification distribution system with a microphone, amplifier and loudspeakers. PA systems are widely used to make announcements in public, institutional and commercial buildings and locations .In PA systems cost, quality and expansion are the major factors that affect the working and implementation of the system. The Zigbee based monito...

The context of this paper is the ZigBee wireless communication standard. ZigBee has gained popularity in market in the recent times due to cost-effectiveness, robustness, reliability, low data rate and low power dissipation. Wide range of residential, commercial and industrial applications have been developed using ZigBee based network. ZigBee technology is based on the IEEE 802.15 standard. In...

Zigbee is the standard of choice in wireless personal area networks with low power consumption, such as, for example, sensor and control wireless networks. Since nodes may be positioned in non-easily accessible places, a high energy efficiency is required in order to maximize the network lifetime and minimize the maintenance costs. A simple and straightforward solution to maximize the network l...

This paper presents a ZigBee In-Patient Monitoring system embedded with a new ZigBee mobility management solution. The system enables ZigBee device mobility in a fixed ZigBee network. The usage, the architecture and the mobility framework are discussed in details in the paper. The evaluation shows that the new algorithm offers a good efficiency, resulting in a low management cost. In addition, ...

Zigbee is specification formalized by IEEE 802.15.4 standard for low power low cost low data rate wireless PAN. .Zigbee communication is a communication technology to connect local wireless nodes and high stability and transfer rate due to data communication with low power. The wireless communication technologies are rapidly spreading to many new areas, including the automation and the importan...

A wireless sensor network (WSN) consists of sensors which are densely distributed to monitor physical or environmental conditions, such as temperature, sound, pressure, etc. The sensor data is transmitted to network coordinator which is heart of the wireless personal area network. In the modern scenario wireless networks contains sensors as well as actuators. ZigBee is newly developed technolog...