1. ZigBee David Barney Kevin Lundgreen Yuchou Chang Jon-Paul Anderson

2. ZigBee Overview • Small, low-power digital radio • Possible 1-2 year life with alkaline battery • based on IEEE 802.15.4 standard for WPANs • Uses ISM radio bands • 2.4 GHz, 955MHz, and 868 MHz • Low cost • ~$1.10/node in high volumes

3. ZigBee Uses • Home Security Systems • Home Automation • Medical Data Collection • Domotics (Domestic Robotics) • Industrial Control • Embedded Sensing

4. The ZigBee Principle • Honeybee Communication • Any two communicate with zig-zag dances • Indicates scouting results, request for help, etc.

5. ZigBee Connections • ZigBee Communication • Self-organizing star and mesh networks • Supports large networks(>65,000 nodes) with low latency • ZigBee Node Types • Coordinator • Router • End Device

6. ZigBee Node Types • Coordinator • “Queen Bee” • Exactly 1 per network • Stores network information • Can bridge to other networks • Router • Less memory/functionality than coordinator • Keeps track of neighbors • Able to pass data from other devices • End Device • Just enough functionality to communicate with parent node • Least memory requirements/cost

7. ZigBee Topology Example ZC ZE ZR ZR ZE ZE ZE ZE

8. ZigBee Power Usage • Long battery life • ~1-2 years with standard alkaline battery • Sleeps for minutes or hours at a time • Low output power • Max output of ~1mW • Low data transfer speeds

9. ZigBee Data Transfer Rates

10. Network Layers

11. ZigBee Security • Encryption using 128-bit key • Symmetric key (shared key) • Multi-layer Security • Network layer uses Advanced Encryption Standard (AES) • Network layer has different levels of security

12. Wireless Comparisons