Wi-Fi Direct Could Be the Death of Bluetooth

A new wireless networking specification that enables devices to establish simple peer-to-peer (P2P) connections without the need for a wireless router or hotspot, has been unveiled by the Wi-Fi Alliance.

It is thought Wi-Fi Direct has a wide array of potential uses, many of which encroach on Bluetooth territory and threaten to make the competing wireless protocol obsolete.

The new spec, previously referred to by the codename 'Wi-Fi peer-to-peer' (does it count as a 'codename' if it is just called what it is in the simplest possible terms?), will be finalised soon and the Wi-Fi Alliance expects to begin certifying devices as Wi-Fi Direct compliant by mid-2010.

"Wi-Fi Direct represents a leap forward for our industry. Wi-Fi users worldwide will benefit from a single-technology solution to transfer content and share applications quickly and easily among devices, even when a Wi-Fi access point isn't available," said Wi-Fi Alliance executive director Edgar Figueroa.

"The impact is that Wi-Fi will become even more pervasive and useful for consumers and across the enterprise."

In theory P2P wireless networking already exists. In addition to connecting to wireless routers or hotspot networks, many wireless devices are capable of creating an ad hoc network -  basically a P2P wireless network between two devices.

Ad hoc wireless networking has always been more complex and cumbersome than it is worth, and it maxes out at 11 Mbps. Wi-Fi Direct will connect at existing Wi-Fi speeds - up to 250 Mbps. Wi-Fi Direct devices will also be able to broadcast their availability and seek out other Wi-Fi Direct devices.

Wi-Fi Direct devices can connect in pairs or in groups. With Wi-Fi Direct only one of the devices needs to be compliant with Wi-Fi Direct to establish the P2P connection. So, for example, a Wi-Fi Direct-enabled mobile phone could establish a connection with a non-Wi-Fi Direct notebook computer to transfer files between the two.

Wi-Fi Direct overlaps into Bluetooth territory. Bluetooth is a virtually ubiquitous technology used for wireless connection of devices like headphones, mice, or the ever-popular Bluetooth earpiece sticking out of everyone's head.

Bluetooth uses less power, but also has a much shorter range and slower transfer speeds. Wi-Fi Direct can enable the same device connectivity as Bluetooth, but at ranges and speeds equivalent to what users experience with existing Wi-Fi connections.

There are potential security concerns that come with a technology like Wi-Fi Direct. Bluetooth has been the subject of security issues like Bluejacking which enables an attacker to connect anonymously with an insecure Bluetooth device and hijack it or compromise its data.

Bluejacking is only a threat in a radius of 20 or 30 feet. Wi-Fi ranges are much greater which opens the possibility of attackers making anonymous connections from the parking lot or across the street.

The Wi-Fi Alliance, which includes members like Cisco and Intel, is aware of the security concerns as well as the risks Wi-Fi Direct could introduce for enterprise networks.

Wi-Fi Direct will include support for WPA2 (Wi-Fi Protected Access 2) and AES encryption for more secure connections and measures are being developed to enable IT admins to exert some control over Wi-Fi Direct networks within their environment.

I think Bluetooth's days could be numbered. If Wi-Fi Direct can provide the same short range, ad hoc device connectivity as Bluetooth (and more) using the same wireless networking hardware that is already included in virtually every notebook, netbook, mobile phone, and other device, why bother adding a Bluetooth adapter and dealing with Bluetooth drivers on top of that?

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See also: Wireless group launches full 11n certification