WUSB ppt

PRESENTATION ON WIRELESS USB

PREPARED BYRACHITHA C

GUIDED BY

LEENA C

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

HISTORY FEATURES

HOW WUSB WORKS DESIGN(TECHNOLOGY INVOLVED) SECURITY

ADVANTAGES CURRENT IMPLEMENTATIONS CONCLUSION

OUTLINE

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

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)

Wired usb

Wired 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

Why 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.

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.

Wireless usb

Wireless usb vision

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.

Wusb topology

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

Wusb technology

Wusb technology

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

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”

WUSB SECURITY DESIGN

◦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

Security design(contd)

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.

advantages

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.

Wusb approaches

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

Wusb implementations

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

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

Next gen wireless personal area network Appears well designed; good support Slow start of products

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

Promises a lot Security is very important

Conclusion

THANK YOU