My Project | Low Rate Wireless Personal Area Networks in NS2

INTRODUCTION

           The IEEE 802.15.4 has recently been adopted as a communication standard for low data rate, low power consumption and low cost Wireless Personal Area Networks. This protocol is quite flexible for a wide range of applications if appropriate tuning of its parameters is carried out. Importantly, the protocol also provides real-time guarantees by using the Guaranteed Time Slot (GTS) mechanism. Indeed, the GTS mechanism is quite attractive for time-sensitive Wireless Sensor Network (WSN) applications, particularly when supported by cluster-tree network topologies, such as defined in the ZigBee standard... Continue Reading

MOTIVATION

The wireless market has been traditionally dominated by high end technologies, but so far Wireless Personal Area Networking products have not been able to make a significant impact on the market. While some technologies like the Bluetooth have been quite a success story, in the areas like computer peripherals, mobile devices, etc, they couldn’t be expanded to the automation arena. This led to the invention of the wireless low data rate personal area networking technology, Zigbee (IEEE 802.15.4),... Continue Reading

Evolution of zigbee

During the last decade there has been an explosion of devices using sensor technologies for control and monitoring purposes. Wired Sensors are now intended to be replaced with wireless technologies. Corporates have been envisioning of a digital home where every device is connected, and remotely controlled and monitored. Even though a perfect digital home is yet a mirage, we are now able to apply several technologies to suite our home and industrial networking needs. However, this concept of a digitally connected home has received a luke warm response due to lack of viable solutions... Continue Reading

Overview of our project 

The objective of our project is to build a simulation model of LR-WPAN and simulated the model using the Network simulator NS2. The WPAN Low Rate Task Group (TG4) is chartered to investigate a low data rate solution with multi-month to multi-year battery life and very low complexity.  This standard specifies two physical layers: an 868 MHz/915 MHz direct sequence spread spectrum PHY and a 2.4 GHz direct sequence spread spectrum PHY.  The 2.4 GHz PHY supports an over air data rate of 250 kb/s and the 868 MHz/915 MHz PHY supports over the air data rates of 20 kb/s and 40 kb/s.... Continue Reading

Applications

There has been tremendous excitement on part of the corporates, the market and the consumers alike because of the wide spectrum of applications that zigbee has to other. It is a revolutionary new technology built to compliment or replace existing not so successful technologies. Automation is the buzz word for zigbee. It stands to automate our household, corporate buildings and industries.... Continue Reading