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Main Features
Wireless USB technology employs the Ultra Wide Band (UWB) method, a high-speed communication technology for short-distance communication via a wide band. Aiming to become the wireless version of USB 2.0, UWB offers the following merits exploiting the features of USB 2.0.
Wireless transfer rate of up to 480 Mbps, the same as USB 2.0
A feature of Wireless USB is that the data transfer speed across a distance of approximately 3 meters, a typical range for the connection of personal computers and peripherals, can theoretically reach 480 Mbps, a rate equivalent to that of the existing USB 2.0 standard. This makes the installation of equipment requiring high-speed transfer of large amounts of data, such as printers and external storage, very easy, and eliminates the need to carry around cables for transferring data from portable devices such as portable HDD players and digital cameras to a personal computer.
Same ease of use and convenience as existing USB devices
The Wireless USB standard has a lot in common with the existing USB standards, and existing systems can be adapted to Wireless USB by fitting them with a Wireless USB module either internally or externally. It is thus possible to continue using existing drivers in personal computers, etc.
Power saving and low-cost development
The use of the MB-OFDM (Multi-Band OFDM) method allows the realization of lower power consumption transmission/reception circuits in addition to high-speed wireless communication. Moreover, in cases when there are several personal computers and peripherals, Wireless USB communication achieves a reduction in circuit scope by limiting the network connection mode to one-to-many, by defining beforehand a master/slave relationship among devices such as "host (personal computer, gaming equipment, etc.)" and "devices (peripheral devices)", unlike a wireless system that assumes many-to-many communication. Moreover, since CMOS technology can be used in the RF processing block, it is possible to continue using existing production lines, allowing for cost saving as well as easy support of future integration.
Security
Host devices that support Wireless USB can communicate with each other without special settings. The trade-off is that when security settings are not performed, anyone within the transmission range can receive the transmitted data, meaning that data may be stolen or rewritten without the user being aware of this, and thus predetermined countermeasures are required. Wireless USB uses a system based on special procedures between the host and devices in order to ensure a level of security comparable with wired communication.
