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Wireless USB
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Outline
y Introduction
y Wired USB
y Reasons for wireless USB
yWUSB features
y Ultra -wide Band
y WUSB Architecture
y Transitional WUSB Hardware
y Comparison of Technologiesy Implementation
y Conclusion
y References
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In
trod ction
y Created by the Wireless USB Promoter Group
y Also known as Certified Wireless USB or WUSB
y Based on the Ultra- Wide Band (UWB)
y High-bandwidth (>500 MHz)
y High Speed 480 Mbit/s- up to 3 meters 110 Mbit/s- up to 10 meters
y Frequency range 3.1 to 10.6 GHz
y Connects up to 127 devices
y Used in game controllers , printers , scanners , digital cameras, MP3
players, hard disks and flash drives
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Wire USBy Overviewy Plug/Play standard for peripheral devices
y Provides hot swapping
y Standardized by the USB Implementers Forum
y Technical Details
y Host/Slave Connection
y PC (host) manages all transfers; peripherals (slave) just responds
y Supports 127 slaves per host
Data Ratesy Low Speed: 1.5 Mbps (Keyboards, mice, etc.)
y Full Speed: 12 Mbps (USB1.1 max speed)
y Hi-Speed: 480 Mbps (USB2.0 max speed)
y Super-Speed: 5 Gbps(USB3.0 max speed)
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Reas ns F r Wireless USBy Wired Issues
y Wires are restrictive
y Multiple wires can be a hassle
y Wires slower than wireless solutions
y Inadequacy of current wireless solutions
y Bluetooth
y Bandwidth of 3 Mbps not enough for higher
demand applications (Video, HDTV, Monitor)
y WiFi
y Expensive
y High power consumption
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Wireless USB featuresy Backward compatibility
y High performance
y
Simple, low-cost implementation
y An easy migration path
y Host-to-device architecture
y Power management
y Logo Certification
y Ease-of-use
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Wireless USB Visi n
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Wireless USB Visi n
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Ultra-wi e Bany Developed by WiMedia Alliance
y Also known as UWB, ultra-wide band, ultra band
y Pulse-based system Uses OFDM
y Determines time of flight
y Speeds over 1 Gbps
y
Range upto 480 Mbps at 3 m; 110 Mbps at 10 my Frequency: 3.1 GHz to 10.6 GHz
y Protection against multi-path / interference
y Bandwidth regulation by FCC
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Ultra-wi e Ban Spectrumy Frequency Range 3 to 10 GHz
y Divided into 14 bands; 5 groups
y Each band group allows up to 7 channels
y Each band is 528 MHz wide
y Band Groups 1 & 2: Longer range apps
y Bands Groups 3 & 4: Shorter range apps
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WUSB Architecture
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Transiti nal WUSB Har warey Host Wired Adapters (HWA)
- Plugs into the wired USB host port of a PC
- Adds WUSB Host functionality to an existing PC
- Not for host to host communication
- Connect to the Device wire adapters wirelessly
- PCI based adapter card
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Transiti nal WUSB Har warey Device Wired Adapters (DWA)
- Also known as USB Hub
- Plugs into USB port of a peripheral (printers, scanners,cameras,etc.)
- Adds wireless USB Peripheral functionality to an existing device
- May have several device ports for making multiple peripherals
wireless
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WUSB Transmissi n
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Wireless USB Topologyy Hub & Spoke model
y Host/Slave Connection
y Similar to wired USB (127 devices; host is PC)
y Each host forms a clustery Clusters can coexist with minimum interference
y Point to point connection
between host & slave
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Data Rate Comparisons
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Comparison ofTechnologiesSpecification Wireless USB
Bluetooth 4.0(proposed)
IEEE 802.11n Bluetooth 2.1
Frequency band 3.1 GHz10.6GHz
UWB (notdecided)
2.4 GHz/5 GHz 2.4 GHz
Bandwidth480 Mbit/s / 110
Mbit/s53 - 480 Mbit/s Max. 600 Mbit/s Max. 3 Mbit/s
Distance 3 m / 10 munknown
distance
100 m1 m100 m,
depending on
output
Modulation OFDM OFDMDSSS, DBPSK,
DQPSK,CCK, OFDM
GFSK
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Wireless USBI
ssues/Problemsy Interference Issues
y Potential conflict to devices on same frequencies
y Detect and Avoid
y Wisairs solution to detect other frequencies
y Switches to frequencies not being used
y Conflict issues are more of a concern for wireless
USB devices being overpowered
y Competing Standards
y Cable-Free USB (Free scale)
y USB-Implementers Forum (Intel, HP, Microsoft)
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WUSB Applications
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Product Comparison
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Wireless USBI
mplementationsy Belkin Cable Free Hub
y Released Dec, 2006
y
Dongle attaches to PCy Retail price of $199.00
y Speeds up to 480 Mbps
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Wireless USB Implementationsy Seagate Wireless USB Hard Drive
y 2.5 inches wide
y Speeds up to 480 Mbps
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Wireless USB Implementationsy GeFen HMDI Extender
y Based on WiMedia Alliance specification
y
Retail price of $699.00y Range of 20 meters; data rates up to 480 Mbps
y Frequency band: 3.1 - 4.8 GHz
y Resolution support : 480i, 480p, 720p, and 1080i
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Wireless USB Timeline
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Conclusiony An upcoming 1.1 specification will increase speed to 1 Gbit/s
and working frequencies up to 6 GHz
y Appears well designed; good support
y Wireless USB standard replaces Bluetooth and Wi-Fiy This will be followed by traditional PC peripherals, then later,
consumer electronics
y Intel and fellow travelers will continue to drive the Wireless
USB initiative into the marketplacey Certified WUSB will be a serious alternative for wireless
transmission in future.
y Next gen Wireless Personal Area Network (WPAN)
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Referencesy www.wikipedia.org/wusb
y www.wikipedia.org/uwb
y
www.usb.org/wusby www.wimedia.org
y www.intel.com/technology/usb
y www.everythingusb.com/wireless_usb
y www.wiconworld.com/uwby www.ebooks.com/technology
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THANK YOU..
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Questions??