guided by: ms. shikha bhardwaj lecturer,ece by: vishwas mehta viii sem,ece-b
TRANSCRIPT
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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