Zigbee intro

18.9.0718.9.07 Zigbee protocol overview -Smart HomeZigbee protocol overview -Smart Home 11
SMART HOMESMART HOME
(Intro to Zigbee)(Intro to Zigbee)
Presentation 1Presentation 1

18.9.07 Zigbee protocol overview -Smart Home2
ZigBee
802.15.4
Wi-Fi
802.11b
Wi-Fi5
802.11a/HL2
GSM/CDMA GPRS/3G LMDS
High Data RateLow Data Rate
ShortRangeLongRange
WAN
LAN
PAN
Bluetooth 2
Text
Digital
video Multi-channel
video
Graphics
Internet
Hi-Fi
audio Streaming
video
Bluetooth 1
802.15.1
WiMedia
802.15.3
Protocols OverviewProtocols Overview

Why ZigBee?Why ZigBee?
Reliable and self healingReliable and self healing
Supports large number of nodesSupports large number of nodes
Easy to deployEasy to deploy
Very long battery lifeVery long battery life
SecureSecure
Low costLow cost
Can be used globallyCan be used globally

Other benefitsOther benefits
Power consumptionPower consumption
Zigbee: 10mA <==> BT: 100mAZigbee: 10mA <==> BT: 100mA
Production costsProduction costs
 In the beginning of 2005In the beginning of 2005
Zigbee: 1.1 $ <==> BT: 3 $Zigbee: 1.1 $ <==> BT: 3 $
Development costsDevelopment costs
Code size ZB/code size BT = ½Code size ZB/code size BT = ½
Bit-error-rate (BER)Bit-error-rate (BER)

Zigbee Frequency BandsZigbee Frequency Bands

Silicon
PHY Layer
MAC Layer
LLC Layer
Network Layer
Zigbee
Stack
Application
Application Interface
Application
Customer
ZigbeeAlliance
IEEE
Zigbee StackZigbee Stack
CC2420CC2420
A Zigbee IC from Texas instruments that has bothA Zigbee IC from Texas instruments that has both
physical and MAC layerphysical and MAC layer

Zigbee Protocol StackZigbee Protocol Stack

• 65,536 network (client) nodes
• Optimized for timing-critical
applications and power
management
– Time to Join Network: <30ms
– Sleeping to active: <15ms
– Channel access time: <15ms
• Full Mesh Networking Support
Basic Network Characteristics
Network coordinator
Full Function node
Reduced Function node
Communications flow
Virtual links

Zigbee Node-ZBCZigbee Node-ZBC
Zigbee Coordinator (ZBC) (IEEE 802.15.4Zigbee Coordinator (ZBC) (IEEE 802.15.4
FFD)FFD)
only one in a networkonly one in a network
initiates networkinitiates network
stores information about the networkstores information about the network
all devices communicate with the ZBCall devices communicate with the ZBC
routing functionalityrouting functionality
bridge to other networksbridge to other networks

Zigbee Node-ZBRZigbee Node-ZBR
Zigbee Router (ZBR) (IEEE 802.15.4 FFD)Zigbee Router (ZBR) (IEEE 802.15.4 FFD)
optional componentoptional component
routes between nodesroutes between nodes
extends network coverageextends network coverage
manages local address allocation/de-manages local address allocation/de-
allocationallocation

Zigbee Node-ZBEZigbee Node-ZBE
 Zigbee End Device (ZBE) (IEEE 802.15.4 RFD)Zigbee End Device (ZBE) (IEEE 802.15.4 RFD)
 optimized for low power consumptionoptimized for low power consumption
 cheapest device typecheapest device type
 communicates only with the coordinatorcommunicates only with the coordinator
 sensor would be deployed heresensor would be deployed here
 Most of the time they are in sleep modeMost of the time they are in sleep mode
 Mostly battery operated.Mostly battery operated.

ZigBee Network Topologies
PAN coordinator
Full Function Device
Reduced Function Device
Star
Mesh
Cluster Tree

Mesh topologyMesh topology

Tree TopologyTree Topology

Slide Courtesy of
ZigBee Mesh NetworkingZigBee Mesh Networking

Slide Courtesy of

Addressing Zigbee NodesAddressing Zigbee Nodes
Addressing Zigbee Nodes:Addressing Zigbee Nodes:
optimized unique 64 bit address (IEEEoptimized unique 64 bit address (IEEE
802.15.4).802.15.4).
16 bit network address (65536 devices).16 bit network address (65536 devices).
256 sub addresses for subunits.256 sub addresses for subunits.

Discovering nodesDiscovering nodes
Device Discovery:Device Discovery:
 unicast (NWK id known)unicast (NWK id known)
 broadcast (NWK id unknown)broadcast (NWK id unknown)
 ZBC-/ZBR-Response: IEEE address + NWKZBC-/ZBR-Response: IEEE address + NWK
address + all known network addressesaddress + all known network addresses
Binding:Binding:
 creating logical links between 2 or more endcreating logical links between 2 or more end
devicesdevices

Low Data Rate
Radio Devices
• TV
• VCR
• DVD
• CD
• Remote
• Mouse
• Keyboard
• Joystick
• Gamepad
• Security
• HVAC
• Lighting
• Closures
• PETs
• Game boys
• Educational
• Monitors
• Diagnostics
• Sensors
Industrial &
Commercial
Consumer
Electronics
Personal
Healthcare
• Monitors
• Sensors
• Automation
• Control
Toys
&
Games
Home
Automation
PC
Peripherals
Zigbee –Application scenariosZigbee –Application scenarios

Queries????Queries????

Zigbee intro

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Zigbee intro