Introduction to Wireless USB: History, Connectivity, Usage [MiniTool Wiki]
What Is Wireless USB?
Wireless USB is the abbreviation of Wireless Universal Serial Bus. In order to further enhance the availability of general USB-based technology, the Wireless USB Prompt Group combines the speed and ease of use of USB 2.0 technology with the convenience of wireless technology.
The wireless technology of wireless USB was based on the Ultra-WideBand wireless radio technology of WiMedia Alliance (now defunct). The wireless radio technology can transmit at 480 Mb/s in the range of 3 meters and 110 Mb/s in the range of 10 meters. It carries a wide range of frequencies, which can be used in the frequency range from 3.1 to 10.6 GHz.
Therefore, the frequency range can be adjusted to a suitable and legal frequency in accordance with local laws, and wireless USB can be used widely all around the world.
History of Wireless USB
- In February 2004: The Wireless USB Promoter Group was formed to develop the technical standards for wireless universal serial buses.
- In May 2005: The Wireless USB Promoter Group unveiled the complete wireless USB technology standard and introduced the 1.0 version of the Wireless USB specification.
- In June 2006: A multi-vendor interoperability demonstration of Wireless USB was presented for the first time at the USB Implementers Forum. Microsoft was responsible for providing drivers for all wireless USB devices.
- In October 2006: WiQuest Communication's Host Wire Adapter (HWA) and Device Wire Adapter (DWA) are approved by the U.S. Federal Communications Commission (FCC) and can be used outdoors and indoors.
- In November 2007: The first computer mainframes for the USB-IF-certified wireless USB master controllers are Lenovo (Lenovo 61) and DELL (Dell Inspiron 1720).
- In 2009: In March, the WiMedia Alliance transferred the WiMedia ultra-wideband (UWB) specification to the Bluetooth Special Interest Group (SIG), but in October, the Bluetooth Interest Group abandoned the development of UWB and turned its attention to 60 GHz.
- On September 29, 2010: The Wireless USB Promoter Group introduced version 1.1 of the Wireless USB Specification with band support for frequencies 6 GHz and above and backward compatibility.
Connectivity of Wireless USB
Up to 127 wireless devices can be connected to the host. W-USB can be used as either a W-USB device or a host. In order to connect to a common wired USB device, the W-USB specification defines a device line adapter. In addition, the W-USB device has a fully compatible USB interface.
W-USB devices are classified in the same way as the traditional USB. Because of the wire adapter, there is no need for a traditional USB hub.
The connection of the W-USB device to the host was created by a setup message sent at a certain time. In addition, the MAC sublayer of the W-USB host is also responsible for overseeing the suitability of the MAC layer of the device.
Apply of Wireless USB
Wireless USB is similar to the applications of USB and can be used in MP3 players, hard disk drives, game controllers, printers, image scanners, digital cameras, and USB flash drives. In addition, the technology of the wireless USB is also very suitable for transferring parallel video streams.
Comparisons Between Wireless USB and Bluetooth
Although wireless USB and Bluetooth are two wireless transmission technologies based on different protocols, the use of Bluetooth has been greatly reduced since the emergence of wireless USB. And now wireless USB has become the terminator and replacement for Bluetooth technology.
Intel believes that W-USB can provide faster transfer rates and higher stability than Bluetooth. And W-USB is not a standard in 802.11, it can cover communications that are not possible with WiFi technology, such as audio & video wireless high-speed transmission between digital cameras and PCs.
According to the technical principle, both Bluetooth and W-USB belong to a small range of personal network communication. Initially, Bluetooth relied on the quality and speed of communication to defeat infrared transmission technology.
However, with the increasing communication speed requirements of people, the Bluetooth communication speed of 24 Mbit/s is gradually unable to be suitable for multimedia, broadband, and other applications; and W-USB with maximum coverage of 10 meters and a communication speed of 480 Mbit/s is showing its strength.