Zig Bee

Zig Bee

Abstract

ZigBee is a low-power wireless technology, rewriting the wireless sensor equation. It is a secure network technology that rides on top of the recently ratified IEEE 802.15.4 radio standard. It is designed to interact with the remote controlled devices, which are put under a single standardized control interface that can interconnect into a network .Once associated with a network, a ZigBee node can wake up and communicate with other ZigBee devices and return to sleep.
Zigbee’s key technical features include three license free frequency bands-2.4GHz,868MHz,915MHz;multiple channels ;up to 100mts range; CSMA-CA channel access; low power, long battery life; supporting up to 255devices per network. 
    
Zigbee is used in home security systems where wireless sensors are easily   installed than sensors that need wiring. The same is true in industrial environments, where wiring typically accounts for 80% of the cost of sensor installations. And then there are applications for sensors where wiring isn't practical or even possible. ZigBee promises to put wireless sensors in everything from factory automation systems to home security systems to consumer electronics.