This is a copy from my old blog.
While doing some background sstudy of Wireless USB i came acrosss interesting information. Apparently there are two different Wireless USB standards that are being developed and they are not compatible with each other. More information aas follows:
Wireless USB (also known as Cablefree USB)
* Supported by UWB forum (pioneered by Freescale semiconductor)
* Uses DS-UWB (direct sequence)
* It mimics USB 2.0 in its interfaces to host and peripheral devices, handling the wireless issues within device adapters.
* This approach of retaining the USB 2.0 protocol means that developers can quickly offer products that users can simply plug in without making any system changes.
* Existing USB drivers will work
* The current Freescale UWB chipset operates at 114Mbps with a likely throughput of 50Mbps
Certified Wireless USB
* Supported by WiMedia alliance and USB-IF (USB Implementers Forum)
* Uses OFDM-UWB
* Certified Wireless USB employs a new communications protocol, similar but not identical to USB, to address the wireless issues.
* The Certified Wireless approach, on the other hand, required the definition of a new specification. The initial specification, which its developers released in May 2005, received a supplement defining the association's methods in March 2006. The specifications are now under the control of the USB-IF.
* Will need new software and USB drivers
* They operate at 480Mbps like USB 2.0 with probably similar throughput (peak 320Mbps)
1 comment:
The DS-UWB is not used anymore. Now only OFDM-UWB is the standard.
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