Activation and deactivation of the radio transceiver
Energy Detection (ED) within the current channel
Link Quality Indication (LQI) for received packets
Clear Channel Assessment for CSMA-CA
Channel frequency selection
Data transmission and reception
ISM ( INDUSTRIAL SCIENTIFIC AND MEDICAL)
868 MHz European Band at 20kbps
915 MHz North American Band at 40kbps
2.4 GHz Global Band at 250kbps
868 868-868.8 1 0 20
915 902-928 10 1-10 40
2450 2400-2483.5 16 11-26 250
Full function device (FFD)
Can talk to any device.
Reduced function device (RFD)
Cannot talk to all the devices.
All devices must have 64 bit IEEE addresses
Short (16 bit) addresses can be allocated to reduce packet
• Zigbee Coordinator (ZC):
• it is the root of the network tree
• acts as a bridge to other networks.
• Zigbee Router (ZR):
• acts as an intermediate router.
• Zigbee End Devices (ZED):
• functionality to talk to the parent node.
• cannot relay data from other devices
• allows the node to be asleep .
Beacon enable mode
Repetitive low latency data using.
Non-Beacon enable mode
Intermittent data using.
ZIGBEE AND BLUETOOTH
Feature(s) Bluetooth ZigBee
Power Profile days years
Complexity complex Simple
Nodes/Master 7 64000
Latency 10 seconds 30 ms – 1s
Range 10m 70m ~ 300m
Extendibility No Yes
Data Rate 1 Mbps 250 Kbps
Security 64bit, 128bit 128bit AES and