Monday, March 29, 2010

ZigBee/IEEE 802.15.4 - General Characteristics:

* Dual PHY (2.4GHz and 868/915 MHz)
* Data rates of 250 kbps (@2.4 GHz), 40 kbps (@ 915 MHz), and 20 kbps (@868 MHz)
* Optimized for low duty-cycle applications (<0.1%)
* CSMA-CA channel access Yields high throughput and low latency for low duty cycle devices like sensors and controls
* Low power (battery life multi-month to years)
* Multiple topologies: star, peer-to-peer, mesh
* Addressing space of up to:
- 18,450,000,000,000,000,000 devices (64 bit IEEE address)
- 65,535 networks
* Optional guaranteed time slot for applications requiring low latency
* Fully hand-shaked protocol for transfer reliability
* Range: 50m typical (5-500m based on environment)