Wake-up radio, as a secondary radio transceiver, is implemented to monitor the channel condition so that the main radio can be turned off when there is no communication activity. This thesis work focuses on the analysis of passive wake-up radio (PWUR), where the wake-up radio is entirely powered by the wake-up signal and does not need any additional battery supply. The work covers PWUR’s both h...

ZigBee technology is a kind of two-way wireless communication technology in short distance, low complexity, low power consumption, low data rate, low cost, which is suitable for the automatic control and remote control. The wireless sensor network may be arranged in a hostile environment, in order to prevent the supply into the fake information to the network, need to realize the security of mu...

Wireless sensor and actuator network is the key technology of service robot intelligent space. This paper is concerned with design and implementation of a ZigBee based wireless sensor and actuator network (hereinafter referred to as ZWSAN), which has been applied in our service robot intelligent space successfully. Firstly, a simplified ZigBee stack applied to ZWSAN is proposed and the primitiv...

ZigBee is a recent wireless standard based on IEEE 802.15.4 for Personal Area Networks. Its use in Wireless Sensor Networks arouses many interests. In this paper, a performance analysis and an improvement of ZigBee routing protocol are carried out. ZigBee routing protocol uses a modified AODV by default and Hierarchical Tree Routing as last resort. Firstly, these two algorithms are compared in ...

The world of wireless communications is quickly progressing. Technologies under research and development promise to deliver more services to more users in less time. Emerging wireless technologies: Wireless Local Area Networks (WiFi-802.11n), Wireless Personal Area Networks (ZigBee) and Wireless Metropolitan Area Networks (WiMAX).. In this paper physical layer parameters are tuned to study the ...

Wireless re-programmable real time remote temperature measurement system is able to measure the real time temperature of various remote locations with an accuracy of 0.25°C each. The existing methods use wire transmission. Hence if fault occur means, cable replacement cost is high. The proposed system uses wireless transmission (Zigbee) with the data rate of 256Kbytes/s, to transmit the measure...

In this chapter, the IEEE 802.15.4 MAC layer is modeled using a per-node Markov chain model. Using this model, expressions for various performance metrics including delay , throughput, power consumption, and efficiency, are derived and such expressions are subsequently validated against the corresponding values obtained via simulation. The simplifying assumptions required by the Markov-chain an...

Wireless sensor networks are network systems consisting of hundreds, even thousands of sensor nodes connected to each other through a wireless environment. Sensor nodes have complex functions, such as the detection, collection, calculation and routing of surrounding data with predefined criteria by placing them randomly or according to a certain strategy into diverse areas. In this study, the I...

Aiming at the real time monitoring requirement of poultry farms on the environment, a online monitoring system is proposed for poultry farms on the environment based on ZigBee, its application of ZigBee wireless networks and sensor technology. supply a network structure of monitoring system, monitoring system node controller of data acquisition, data transmission and control node, which is TI's...

Received Aug 2, 2017 Revised Nov 24, 2017 Accepted Dec 18, 2017 ZigBee is an IEEE 802.15.4 standard for information interchanges with business and purchaser gadgets. It is composed around low-control utilization permitting batteries to keep going forever. The ZigBee standard gives system, security, and application bolster administrations working on top of the IEEE 802.15.4 Medium Access Control...