WIRELESS Universal serial bus[USB]

Wireless USB is a wireless technology which enables the high speed computer peripheral interface, USBs. It is a wire replacement of existing USB technology using a Multi Band Orthogonal Frequency Division Multiplexing radio technique. Wireless USB is a logical bus that supports data exchange between a host device(typically a PC ) and a wide range of simultaneously accessible peripherals. The attached peripherals share bandwidth through a host- scheduled, TDMA-based protocol. The bus allows peripherals to be attached, configured, used, and detached while the host and other peripherals are in operation. Security definitionsare provided to as sure secure associations between hosts and devices, and to assure private communication. Wireless USB connects USB devices with the USB host using a 'hub and spoke' model. The Wireless USB host is the'hub " at the center, and each device sits at the end of a 'spoke'. E ach ' spoke ' is a point-to-point connection between the host and device.Wireless USB hosts can support up to 127 devices.

INTRODUCTION:

Universal serial bus[USB] technology has made it easier to connect peripherals to PCs than prior methods, such as serial and parallel ports. USB lets users attach peripherals and other devices-such as digital cameras, game controllers, hard drives, printers, and scanners-without having to install individual drivers or use expansion cards, all withoutrebooting the computer. However, USB requires connections via cables, which can become a jumble when many devices are involved. And the cables limit the distance over which users can connect devices. To address this issue, a number of companies-including Alereo, Belkin International, D-Link, Fujits, Gemtek Technology, Hewlett-Packard, Icron Technologies,Intel, Lenovo, LSI Corp., Realtek Semiconductor, Samsung, Staccato Communications, Synopsys, and Wisair- are beginning to release products based on wireless USB (WUSB). "There is significant interest among both computer and consumer- electronic vendors to move from wired towireless peripheral connections,"

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