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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??