Wireless USB (WUSB) products are finally arriving at the market.
The goal of wireless USB
l Wireless version of USB; same features and speeds as of Wired USB
l Interoperable across three major platforms
¡ Consumer Electronic devices (digital video/audio)
¡ Mobile devices (cellular phones, PDA)
¡ Personal Computing (laptop, PC, printer, peripherals)
l High bandwidth to support demanding data transfer (High Definition, Monitors)
l Mobile friendly
¡ Low power usage
¡ Inexpensive costs
¡ Small physical implementation
l High level of security
l Next gen Wireless Personal Area Network (WPAN)
Devices to WUSB can be connected by two methods:
l If the PC and/or the device don’t have native support to WUSB, you must install a dongle to convert a standard USB port into WUSB.
l If the PC and/or the device already have native support to WUSB – i.e., they come with a WUSB antenna – no extra device is needed.
l Up to 127 peripherals can be connected using a single antenna on the PC.
The maximum theoretical transfer rate from WUSB is the same as USB 2.0 i.e. 480 Mbps (60 MB/s) if the device is within 3 meters (9.84 feet) from the PC or 110 Mbps (13.75 MB/s) if the device is within 10 meters (32.8 feet) from the PC. As you can see, the more distant the devices are from the PC, lower is the transfer rate.
Bluetooth is another wireless technology that allows the connection between the PC and peripherals without wires. At this time, however, Bluetooth is targeted to low-speed devices only, as its maximum transfer rate is of 1 Mbps (128 KB/s) or 3 Mbps (384 MB/s), depending on the Bluetooth generation (1 and 2 with EDR, Enhanced Data Rate, respectively). The next Bluetooth generation is scheduled to have the same transfer rate as WUSB, but this technology is not yet available.
Data Rate Comparisions:
Wireless USB works on the UWB frequency range (Ultra Wide Band), while Bluetooth technology works on 2.4 GHz frequency, the same used by IEEE 802.11 wireless networks (Wi-Fi).
¡ Features of UWB
l Speed/Range
¡ Scaleable speeds up over 1 Gbps
¡ Currently 480 Mbps at 3 meters; 110 Mbps at 10 metres
l Frequency: 3.1 GHz to 10.6 GHz
¡ Divided into 14 bands; 5 groups
l Each band is 528 MHz wide
l OFDM symbols are interleaved across all bands
l Provides protection against multi-path / interference
Comparison of digital RF systems Wireless USB vs. 802.11a/b/g & Bluetooth | ||||
Specification | Wireless USB Specification Rev. 1.1 | Bluetooth 4.0 (proposed) | Wi-Fi (IEEE 802.11n) | Bluetooth 2.1 + EDR |
Frequency band | 3.1 GHz–10.6 GHz | UWB (not decided) | 2.4 GHz/5 GHz | 2.4 GHz |
Bandwidth | 53 - 480 Mbit/s | 53 - 480 Mbit/s | Max. 600 Mbit/s | Max. 3 Mbit/s |
Distance | 3 - 10 m | unknown distance | 100 m | 1 – 100 m, depending on output |
Modulation | MB-OFDM | MB-OFDM | DSSS, DBPSK, DQPSK, CCK, OFDM | GFSK |
Standardization | September 2010 | pre-standard | September 2009 | July 2007 |
Belkin Wireless USB Hub And Receiver
Seagate WUSB HDD Coming Soon…
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