ZigBee Technology

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ZigBee Technology

• By
• Subhasis Choudhury Roll No EE 200118130
• Under the guidance of
• Mr. Pradeep Ku. Jena

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Why is ZigBee needed?

• No wireless network standard that meets the
  unique needs of sensors and control devices.
• wireless systems dont require high data rates
  but do require low cost and very low current
  drain.
• proprietary systems are creating significant
  interoperability problems with each other and
  with newer technologies.

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Features of ZigBee

• Low power consumption
• High density of nodes per network
• Simple protocol, global implementation
• Network Flexibility
• License free operation in 2.4 GHz band
• Small size-less than 9 mm9 mm
• Hundreds of devices per Network

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ZigBee-Typical Traffic Types Addressed

• Periodic data -Application defined rate (e.g.,
  sensors)
• Intermittent data-Application/external stimulus
  defined rate (e.g. light switch)
• Repetitive low latency data-Allocation of time
  slots (e.g. mouse)

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ZigBee Stack
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Physical (PHY) Layer Description
Three frequency bands are specified, an
implementation need only operate on one of the
three. 868 MHz for European applications
902-928 MHz for North American applications
2.450 GHz for world wide applications 868
MHz 902-928 MHz 2.450 GHz Data Rate 20 kbps 40
kbps 250kbps Channels 1 10 16 TX
Power -3dBm -3 dB-m -3dBm Rx
Sensitivity -92dBm -92 dB-m -85dBm Link
Budget 89dB 89 dB 82dB
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Medium Access Control (MAC) Layer Description
Two types of devices used - Full function
device (FFD) Reduced function device (RFD)
Uses PAN Coordinator
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Network Layer Description

• Features
• Starting a network
• Joining and leaving a network
• Configuring a new device
• Addressing
• Synchronization within a network
• Security
• Routing

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Application Layer

• Consists of -
• APS Sub-Layer
• ZDO
• APL Sub-Layer
• Provides(1) Discovery
• (2) Binding

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SECURITY

• ZigBee uses MAC layer security
• Advanced Encryption Standard

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Comparison WiSE vs. Zigbee

• primary considerations
• Cost of Solution
• Range Performance
• Reliability
• Scalability
• Data Rate
• Timing
• Power

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CONCLUSION

• Will play a vital role in the mass adoption
  of cost effective, low power, mesh networking
  technology for monitoring and control
  applications, based on an open global standard.
• More than 120 companies have joined within 2
  months.
• Near Future more flexibility and cost savings for
  consumers and greater control over household
  appliances.
• Used for campus-wide electrical and security
  systems from a single computer.
• Above all enable sensor networks to blanket a
  city to check for bio-terror hazards such as
  biological bombs.
• -gtZigBee is ready, but are we ready for this
  wireless revolution?

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Thank You!