Modeling and simulation can help to validate and evaluate the performance of wireless sensor networks (WSNs) within specific applications. In order to resolve the issue of the restriction on node mobility in existing Zigbee WSN simulation models, this paper proposes a Zigbee compliant new simulation model using the OPNET simulator. Based on the Zigbee MAC layer model in OPNET Modeler, we develo...

In a tree-structured ZigBee wireless sensor network, nodes close to the root of the tree (i.e., hot-spot nodes) may exhaust their power earlier than those distant from the root due to heavy loads on packet forwarding. This hot-spot problem is inherent in tree-structured networks and may demand extra energy to recover from failures of hot-spot nodes. In this paper, the backbone-aware topology fo...

In recent years, the home environment has seen a rapid increase in usage of network enabled digital technologies that offer new and exciting opportunities to increase the connectivity of devices within the home environment for the purpose of home automation. One of such digital technologies is known as ZigBee which is a recent wireless standard based on IEEE 802.15.4 used for Personal Area Netw...

The proposed system provides real time tracking application that provides location of the mobile unit to the fixed control unit as well as display advertisements. The location of the object is seen on the map on the computer interfaced with the central unit. The ZigBee module designed to operate within the ZigBee protocol to support GPS tracking system in terms of latitude and longitude. The mo...

In this paper a structural analysis in understanding of ZigBee based transmission is investigated and studied. The proposed system is designed and analyzed to achieve a systematic suppressing and load overhead balancing under packet transferring from one mode to another via ZigBee in the absolute presence of Wi-Fi, the system has successfully achieved a greater rate of success in understanding ...

Zigbee an IEEE 802.15.4 standard for low power and Low Rate Wireless Personal Area Networks (LRWPANs) are evolving as a promising technology to bring envisioned ubiquitous paragon, into realization. It is moulded on the physical layer and medium access control defined in IEEE 802.15.4. Since it’s a low power device, throughput enhancement is a challenging task in non-beacon enabled Zigbee netwo...

<p>Wireless sensor networks (WSN), referring to groups of technologies wirelessly controlled, are widely used in many different fields, agriculture, medical, military, etc. These mainly for monitoring physical or environmental conditions, such as temperatures, sound, pressure, and so on. In WSN there Wi-Fi, radio frequency (RF), Bluetooth, ZigBee, Z-Wave, Furthermore, is one this technolo...