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ZigBee Technology

By

Subhasis Choudhury Roll No: EE 200118130

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Under the guidance of

Mr. Pradeep Ku. Jena

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National Institute of Science & Technology

Technical Seminar Presentation-2004

Presented By: Subhasis Choudhury [EE200118130]

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Why is ZigBee needed?�

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  • No wireless network standard that meets the unique needs of sensors and control devices.
  • wireless systems don’t 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.

National Institute of Science & Technology

Technical Seminar Presentation-2004

Presented By: Subhasis Choudhury [EE200118130]

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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 mm*9 mm
  • Hundreds of devices per Network

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National Institute of Science & Technology

Technical Seminar Presentation-2004

Presented By: Subhasis Choudhury [EE200118130]

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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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National Institute of Science & Technology

Technical Seminar Presentation-2004

Presented By: Subhasis Choudhury [EE200118130]

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ZigBee Stack

National Institute of Science & Technology

Technical Seminar Presentation-2004

Presented By: Subhasis Choudhury [EE200118130]

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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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National Institute of Science & Technology

Technical Seminar Presentation-2004

Presented By: Subhasis Choudhury [EE200118130]

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Medium Access Control (MAC) Layer Description

Two types of devices used :-

* Full function device (FFD)

* Reduced function device (RFD)

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*Uses PAN Coordinator

National Institute of Science & Technology

Technical Seminar Presentation-2004

Presented By: Subhasis Choudhury [EE200118130]

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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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National Institute of Science & Technology

Technical Seminar Presentation-2004

Presented By: Subhasis Choudhury [EE200118130]

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Application Layer�

Consists of :-

      • APS Sub-Layer
      • ZDO
      • APL Sub-Layer

Provides(1) Discovery

(2) Binding

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National Institute of Science & Technology

Technical Seminar Presentation-2004

Presented By: Subhasis Choudhury [EE200118130]

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SECURITY

  • ZigBee uses MAC layer security
  • Advanced Encryption Standard

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National Institute of Science & Technology

Technical Seminar Presentation-2004

Presented By: Subhasis Choudhury [EE200118130]

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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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National Institute of Science & Technology

Technical Seminar Presentation-2004

Presented By: Subhasis Choudhury [EE200118130]

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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.

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->ZigBee is ready, but are we ready for this wireless revolution?

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National Institute of Science & Technology

Technical Seminar Presentation-2004

Presented By: Subhasis Choudhury [EE200118130]

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National Institute of Science & Technology

Technical Seminar Presentation-2004

Presented By: Subhasis Choudhury [EE200118130]