GUIDED BY:MS. SHIKHA BHARDWAJLECTURER,ECE

BY:VISHWAS MEHTAVIII SEM,ECE-B

www.powerpointpresentationon.bogspot.com

• Technological Standard Created for Control and Sensor Networks

• Based on the IEEE 802.15.4 Standard • Created by the ZigBee Alliance

• Large networks (large number of devices and large coverage area) that can form autonomously and that will operate very reliably for years without any operator intervention

• Very long battery life (years off of a AA cell), very low infrastructure cost (low device & setup costs) and very low complexity and small size

• Device data rate and QoS needs are low • Standardized protocols are necessary to allow

multiple vendors to interoperate

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• Reliable• Mesh networking• Low data-rate applications• Very long battery life• Secure• Scalable• Low cost• Global applicability

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• Engineers feel Wi-Fi and Bluetooth may be unsuitable. This spawned the idea of digital radio networks via direct-sequence spread spectrum coding.

• ZigBee-compliant radios may operate on one of three different radio bands: the 800 MHz, 900 MHz, or 2.4 GHz frequencies.

• Follows the internationally recognized radio standard for the MAC and PHY Layer.

Low Data Rate Radio Devices

TV VCR DVD CD Remote

Mouse Keyboard Joystic

k Gamepad

Security HVAC Lighting Closure

s

PETs Gameboy

s Educational

Monitors Diagnostic

s Sensors

Industrial & Commercial

Consumer Electronics

Personal Healthcare

Monitors Sensor

s Automation Control

Toys & Games

Home Automation

PC Peripherals

PC And Peripherals

• Desktop PCs and Home Entertainment Systems (Home Theatre TV)o Computer peripherals;o HID devices

• Video conference equipmento Remote control

• Video gaming equipmento Multi-player PC & video gameso Remote controls for audio and video equipment

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Human Input Devices (HID)

• Keyboard• Mouse / Pointing Device• Remote Controls (controls for audio & video

equipment)• Gaming device• Double Joystick

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• May allow more patient freedomo Monitors vital statistics and sends via

internet Patient can remain in their own home Lowers cost and improves comfort

o Can be used in hospice care Patients are allowed greater

movement Reduced staff to patient ratio Light way to bathroom when they get

out of bed Reduces patient confusion

graphic

graphic

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• Wireless Lighting Controlo Dimmable ballastso Light switches

anywhereo Customizable lighting

schemeso Energy Saving on

bright days

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• ZigBeeo Smaller packets over large

networko Mostly Static networks with

many, infrequently used devices

o Home automation, toys, remote controls, etc.

• Bluetootho Larger packets over small networko Ad-hoc networkso File transfer o Screen graphics, pictures, hands-

free audio, Mobile phones, headsets, PDAs, etc.

Optimized for different applications

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Standard Bandwidth Protocol Stack Size

Stronghold Applications

ZigBee 250kbps 4-32KB Long battery life, low cost

Remote control, battery-operated products, sensors

Bluetooth 1 Mbps ~100+KB Interoperability, cable replacement

Wireless USB, handset, headset

Wi-Fi Up to 54Mbps 100+KB High data range Internet browsing, PC networking, file transfers

• Bluetooth is a cable replacement for items like Phones, Laptop Computers, Headsets

• Bluetooth expects regular chargingo Target is to use

<10% of host power

Address Different Needs

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• ZigBee is better for devices Where the battery is ‘rarely’ replacedo Targets are :

Tiny fraction of host power

New opportunities where wireless not yet used

Address Different Needs

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• ZigBee targets applications not addressable by Bluetooth or any other wireless standard

• ZigBee and Bluetooth complement for a broader solution

ZigBee and Bluetooth

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• Allows users to balance system cost, reliability & battery life

PAN coordinatorFull Function DeviceReduced Function Device

Star

Mesh

Hybrid (Cluster Tree)

• Simplicity• Low Cost• Long Battery Life• Single Point of

Failure

• Reliability• Extended Range• No Battery Life• Routing

Complexity

• Flexibility• Reliability/Range of

Mesh• Battery Life of Star• Design Complexity24

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• IEEE 802.15.4 is a standard defined by IEEE for low rate, wireless personal area network.

• The standard defines the Physical layer and Medium Access Layer

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• PHY- It defines low power spread spectrum radio operating at 2.4 GHz with a basic data rate of 250 kbps

• MAC -defines how multiple 802.15.4 radios operating in the same area will share the airwaves. The MAC supports several architectures, including a star topology, tree topologies and mesh topologies

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IEEE 802.15.4 PHY

IEEE 802.15.4 MAC

ZigBee NWK

MAC802.2 LLC

IP

API UDP

ZA1 ZA2 … ZAn IA1 IAn

Transmission & reception on the physical radio channel

Channel access, PAN maintenance, reliable data transport

Topology management, MAC management, routing, discovery

protocol, security management

Application interface designed using

general profile

End developer applications, designed using application

profiles

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Beacon Enabled Mode

Non-Beacon Enabled Mode

Coordinator to Device Device to Coordinator

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Data Rate (Mbps)

Range

ZigBee802.15.4 802.15.3

802.15.3a802.15.3c

WPAN

WLAN

WMAN

WWAN

WiFi802.11

0.01 0.1 1 10 100 1000

Bluetooth802.15.1

IEEE 802.22

WiMaxIEEE 802.16

IEEE 802.20

Pros

• good extension of existing standards

• supported by many companies

• low power consumption• low cost• easy implemented (Designer

concentrates on end application)

• flexible network structure

Cons

• Not many end devices available yet

• Single point of failure (centralized architecture)

CompXs

and many more....

“Just as the personal computer was a symbol ofthe '80s, and the symbol of the '90s is the WorldWide Web, the next nonlinear shift, is going to bethe advent of cheap sensors.”

-Paul Saffo Institute for the Future

Parting Thought

Thank youfor

your attention!

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