UWB? As we mentioned before, PANs are the primary intended application; imagine a home or small office net- work with the ability offer gigabits per second of bandwidth over dis- tances that easily accommodate the entire office or home. ZigBee ZigBee, also known as IEEE 802.15.4, offers a cost-effective, standards- based wireless solution that specifically supports low data rates, low power consumption, security, and reliability. The name derives from a Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com Copyright © 2004 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website. Access Technologies Access Technologies biological principal known as the ZigBee Principle, seen in honeybee hives. The colonial honeybee lives with a queen, a few male drones, and thousands of worker bees. The survival of the colony depends on a process of continuous communication of vital information among all members of the hive. The technique that honeybees use to communicate with each other is called the ZigBee Principle, which defines the zigzag dance pattern that the insects use to communicate critical information to each other. IEEE 802.15.4 was nicknamed ZigBee because it facilitates the ability of humans to emulate this survival behavior. ZigBee is designed to support such applications as home and environ- mental controls including lighting, automatic meter reading, telemetry for smoke and carbon monoxide detectors, HVAC, heating, security, drap- ery and shade controls, set top boxes, and specialized applications such as medical sensing and monitoring. To date, ZigBee is the only standard that supports the unique requirements of remote monitoring and control networks as well as sensory network applications. It is designed to sup- port the broad deployment of wireless networks that have low cost, low power requirements. In fact, ZigBee is designed to run for years on a sin- gle battery. ZigBee products rely on the IEEE 802.15.4 physical 