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Wireless Usb Ppt

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PRESENTATION ON WIRELESS USB
Transcript
Page 1: Wireless Usb Ppt

PRESENTATION ON WIRELESS USB

Page 2: Wireless Usb Ppt

OUTLINE

WIRED UNIVERSAL SERIAL BUS(USB)OVERVIEW OF WIRELESS USB(WUSB)

HISTORY FEATURES

HOW WUSB WORKS DESIGN(TECHNOLOGY INVOLVED) SECURITY

ADVANTAGES CURRENT IMPLEMENTATIONS CONCLUSION

Page 3: Wireless Usb Ppt

WIRED USB

Overview

Plug/play standard for peripheral devices.

Standardized by the USB Implementers forum.

Technical Details

Host/slave connections• PC(host) manages all the transfers; peripherals(slave) just respond.

• Supports 127 devices per host.

Physical connections

• Four wire connection :Two wires for power (+5 and GND).Two

wires (twisted pair) for synchronous serial data

Page 4: Wireless Usb Ppt

Wired usb

Technical details(contd.)• Computer supplies power (upto 500ma)

Data rates– Low Speed: 1.5 Mbps (Keyboards, mice, etc.)– Full Speed: 12 Mbps (USB1.1 max speed)–Hi-Speed: 480 Mbps (USB2.0 max speed)

Page 5: Wireless Usb Ppt

Wired usb

Page 6: Wireless Usb Ppt

Why wireless usb?

Wired issues

Wires are restrictive.

Multiple wires can be a hassle.

Current wireless solutions inadequate

Bluetooth: Offers low b/w which is not enough for higher demand

applications (Video, HDTV, Monitor)

WiFi

– Expensive

– Too much power usage for mobile devices

Page 7: Wireless Usb Ppt

Wireless usb

On February 17, 2004, at the Intel® Developer Forum, Intel

Corporation and other technology industry leaders announced the

formation of the Wireless USB Promoter Group.

The group includes Agere Systems, HP,Intel, Microsoft Corporation,

NEC, Philips Semiconductors and Samsung Electronics.

New wireless extension to USB. It reduces nest of wires.

Allows peripherals to be connected without plug-in-cards .

It is based on the Ultra wideband technology which operates in the

range of 3.1 – 10.6 GHz.

Page 8: Wireless Usb Ppt

Wireless usb

FEATURES No use of wires, i.e. wireless network Offers data rates of 480 Mb/s at 3 meters and 110

Mb/s at 10 meters. Unidirectional/ bidirectional operations Multipoint to point connectivity Robust performance in noisy environments Interfaces with any other devices that supports

Bluetooth/ Wi-Fi/ WiMax without any complications.

Page 9: Wireless Usb Ppt

Wireless usb vision

Page 10: Wireless Usb Ppt

Wusb topology

WUSB is a hub and spoke topology.

Connection is point to point and directed between the WUSB

host and WUSB device.

Logically, maximum 127 WUSB devices can be connected to

WUSB host.

Each host forms a cluster.

Clusters can co-exist with minimum interference.

Topology also supports dual role model.

Page 11: Wireless Usb Ppt
Page 12: Wireless Usb Ppt

Wusb technology

Features of UWB Speed/Range

• Scaleable speeds up over 1 Gbps• Currently 480 Mbps at 3 m; 110 Mbps at 10 m

Frequency: 3.1 GHz to 10.6 GHz• Divided into 14 bands; 5 groups

– Each band is 528 MHz wide– Uses the OFDM technique to transmit data– Provides protection against multi-path / interference

• Band Groups 1 & 2: Longer range apps

• Bands Groups 3 & 4: Shorter range apps• Bands can be turned off to accommodate for conflicts or for

regulations

Page 13: Wireless Usb Ppt

Wusb technology

Power Power is limited due to usage of wide spectrum Low power for mobile devices and minimum

interference

Page 14: Wireless Usb Ppt

WUSB SECURITY DESIGN

Overview– Strongly stressed in WUSB specification and outlined in its

own requirements document– Security needed due to crowded environments– Two major components: Association and Encryption

Association– Overview

• Device must first associate with the host in a one-time event• Accomplished via wired verification or numeric association

– Wired Verification• Cable is attached between devices.• Exchanges a unique 384-bit identifier known as the

“connection context”

Page 15: Wireless Usb Ppt

Security design(contd)

– Numeric Association• Devices associate wirelessly• User must enter a hex code manually

Encryption– Data encrypted with the AES 128 algorithm– During each session devices derive a session key based on

“connection context”– Wireless data is encrypted using session key

Page 16: Wireless Usb Ppt
Page 17: Wireless Usb Ppt

Advantages

Speed : Delivers high speed of upto 480 Mbps at 10 feet

and 110 Mbps at 30 feet.Power management : Sleep,listen wake and conserve

modes ensure devices use minimum power.

Security :WUSB devices encrypt their data transmissions.

Ease of use : Offers same plug and play as wired USB but more convenience due to wireless connection

Backward compatibility : Apps built for USB work with WUSB also.

Page 18: Wireless Usb Ppt

Wusb approaches

Freescale’s cable free USB

Wireless usb hookups happen via a dongle.

Dongle exchanges signals with a usb hub plugged into a peripheral.

Dongle can be fit into a normal usb 2.0 port

Intel Corp’s Certified Wireless usb

Makes use of hub and spoke model.

Wireless usb hub and devices with integrated wireless usb

communicate with a single host.

Page 19: Wireless Usb Ppt
Page 20: Wireless Usb Ppt

Wusb implementations

Belkin Cable Free Hub Belkin demonstrated the prototype of the cable free hub in 2006 at the

international consumer electronics show in Las Vegas in January– Released Dec, 2006– Dongle attaches to PC– Speeds up to 480 Mbps

Page 21: Wireless Usb Ppt

GeFen HMDI Extender Based on WiMedia Alliance specification Range of 20 meters; data rates up to 480 Mbps Frequency band: 3.1 - 4.8 GHz

Page 22: Wireless Usb Ppt

Seagate Wireless USB Hard Drive 2.5 inches wide Speeds up to 480 Mbps

Page 23: Wireless Usb Ppt

Conclusion

Next gen wireless personal area networkAppears well designed; good supportSlow start of products

Will it really catch on? More products need to be developed

Promises a lotSecurity is very important

Page 24: Wireless Usb Ppt

THANK YOU


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