ZigBee David Barney Kevin Lundgreen Yuchou Chang Jon-Paul Anderson

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

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

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

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

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

ZC ZR ZE ZigBee Topology Example

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

ZigBee Data Transfer Rates Frequency Data Rate 2.4 GHz 250 Kbps 915 MHz 40 Kbps 868 MHz 20 Kbps

Network Layers

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

Wireless Comparisons