zigbee1621
TRANSCRIPT
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ZIGBEE
Wireless Control
That Simply Works
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What is ZIGBEE technology?
IEEE->IEEE 802->IEEE 802.15->IEEE 802.15.4->ZIGBEE tech
.ZIGBEE is an established set of specifications
for wireless personal area networking(WPAN),
for low data rate, low power, low cost wireless
systems operating in unlicensed RF domain.
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ZIGBEE Features
Typical Range:- 1-100 m
ISM (industrial,scientific,medical) radio bands:-
2.4 Ghz Global Band at 250kbps 868 Mhz European Band at 20kbps
915 Mhz North American Band at 40kbps.
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ZIGBEE Features cont..
Low Power Consumption.
Battery life from multi-months to years.
Bi-DirectionalSupport low latency devices.
Capable of connecting 65,536 devices per network.
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ZIGBEE Stack Architecture
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ZIGBEE Markets & Applications
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Some ZIGBEE Applications
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ZigBee Alliance
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ZIGBEE Device Typesy ZigBee Coordinator (ZC)
One required for each ZB network.
Initiates network formation.
ZigBee Router (ZR) Participates in multihop routing of messages.
ZigBee End Device (ZED) Does not allow association or routing.
Enables very low cost solutions
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ZIGBEE-Highly Reliable
Mesh networking protocol provides redundantpaths
Automatic retries and acknowledgements.
High intrinsic interference tolerance Multiple channels
Supports Frequency agility
Robust modulation
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ZigBee-Highly Secure
Utilizes AES 128-bit encryption
Concept of a trust center
Link and network keys Authentication and encryption
Security can be customized for the
applicationKeys can be hard-wired intoapplication
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Home Awareness
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Use Case: Cinema Example
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Wireless ComparisonsWireless Parameter
Frequency band
Blutooth
2.4Ghz
WI-FI
2.4Ghz
Zig Bee
2.4Ghz
Physical/MAC layersIEEE802.15.1
IEEE802.110 IEEE 802.15.4
Range 9m 75 to 90m Indoors up to 30m Out doors(lineof sight):up to 100m
Current consumption 60mA(TX mode)400mA(TXmode)20mA(Standby mode)
25.35mA(TX mode)3mA(Standbymode)
Raw data rate 1Mbps 11Mbps 250Kbps
Protocol stack size
Typical network jointime
250 KB
>3 sec
1MB
Variable 1sectypically
32KB4KB(for limited function anddevices)30 ms typically
Interface avoidancemethod
FHSS(frequency-hoppingspread spectrum)
DSSS(direct-sequencespread spectrum)
DSSS(direct-sequence spreadspectrum)
Minimum quietbandwidth required
15Mhz(dynamic) 22Mhz(static) 3Mhz(static)
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CONCLUSION
yZIGBEE and the underlying 802.15.4 communications tecnology could from the basis of future wireless sensors,offering
Data reliability
Long battery life
Lower system costs
Good range through flexible networking.
Reliable and self healing
Support large number of nodes
Easy to deploy
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Closing Thought
y Just as the personal computer was a symbol of the
'80s, and the symbol of the '90s is the World Wide Web, the next nonlinear shift, is going to be theadvent of cheap sensors.