14-11-2012, 11:47 AM
ZigBee
ZigBee.ppt (Size: 854.5 KB / Downloads: 57)
Why ZigBee?
Standard in a fragmented market
Many proprietary solutions, interoperability issues
Low Power consumption
Users expect battery to last months to years!
Low Cost
High density of nodes per network
Simple protocol, global implementation
Market Requirements
Global licence free ISM band operation
Unrestricted geographic use
RF penetration through walls & ceilings
Automatic/semi-automatic installation
Ability to add or remove devices
Possible voice support
ZigBee - General Characteristics
Data rates of 250 kbps and 20 kbps
Star topology, peer to peer possible
255 devices per network
CSMA-CA channel access
Optional Guaranteed Time Slot
Fully handshaked protocol for transfer reliability
Low power (battery life multi-month to years)
Dual PHY (2.4GHz and 868/915 MHz)
Extremely low duty-cycle (<0.1%)
Range: 10m nominal (1-100m based on settings)
Location Aware: Yes, but optional
ZigBee.ppt (Size: 854.5 KB / Downloads: 57)
Why ZigBee?
Standard in a fragmented market
Many proprietary solutions, interoperability issues
Low Power consumption
Users expect battery to last months to years!
Low Cost
High density of nodes per network
Simple protocol, global implementation
Market Requirements
Global licence free ISM band operation
Unrestricted geographic use
RF penetration through walls & ceilings
Automatic/semi-automatic installation
Ability to add or remove devices
Possible voice support
ZigBee - General Characteristics
Data rates of 250 kbps and 20 kbps
Star topology, peer to peer possible
255 devices per network
CSMA-CA channel access
Optional Guaranteed Time Slot
Fully handshaked protocol for transfer reliability
Low power (battery life multi-month to years)
Dual PHY (2.4GHz and 868/915 MHz)
Extremely low duty-cycle (<0.1%)
Range: 10m nominal (1-100m based on settings)
Location Aware: Yes, but optional