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Author Topic: Wi-Fi Direct: Device-to-Device without Wireless Network  (Read 1196 times)


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Wi-Fi Direct: Device-to-Device without Wireless Network
« on: October 26, 2010, 06:34 PM »
The Wi-Fi Alliance is about to drop a wireless connectivity bombshell called Wi-Fi Direct. It will enable device-to-device connections using current Wi-Fi standards. The Wi-Fi Alliance will begin certifying Wi-Fi Direct devices today.

Communication between Wi-Fi devices isn’t specifically new. The Nintendo DS, for instance, has had device-to-device Wi-Fi interaction for some time, but the technology is proprietary.

The Wi-Fi Alliance differentiates Wi-Fi Direct by certifying the standard, ensuring interoperability. Devices stamped with the Wi-Fi Direct certification don’t need wireless networks, as they essentially become micro-hotspots.

This technology will conceivably allow devices like an Eye-Fi memory card to directly beam an image to a wireless printer. Since Wi-Fi Direct is largely software based, many recent devices should be upgradeable.

Speeds for Wi-Fi Direct are based on 802.11b/g/n channels, so we’re looking at intra-device throughput at rates upwards of 300Mbps. Range will also be a major selling point, and it’s reasonable to expect that future Wi-Fi Direct devices will eventually achieve distances similar to our home wireless networks.

Bluetooth will undoubtedly be the first technology to suffer as a result of Wi-Fi Direct. Although Bluetooth is aimed, almost universally, at close connections like headsets, it will be hard to trump the speed of Wi-Fi direct. Additionally, Wi-Fi Direct would use the same transponders as other Wi-Fi functions, so device manufacturers will likely be quick to cut redundant technologies.