Wednesday, August 13, 2014

Wi-Fi Direct

Bluetooth has been the popular wireless technology standard for some time now and still trending. The numbers of Bluetooth supported devices have scaled up rapidly over the past few years. It has been designed specifically for exchanging data over short distance (say 10m). Technically speaking, it makes use of Ultra High Frequency radio waves in the band (2.4-2.5 GHz) to create a Personal Area network (PAN) to share data over the network. The latest version is Bluetooth v4.0 which supports data transfer rate up-to 24Mbit/s. The pace of the contemporary society demands/encourage increase in data transfer rate. This demand in turn led to the advent of Wi-Fi Direct.

Although you may have a perceptive definition in mind about the definition of Wi-Fi, I would like to define it again, just to maintain the logical flow of this post. Wi-Fi refers to a facility allowing computers, smartphones, or other devices to connect to the Internet within a particular area bounded by the range of the wireless access point. The bandwidth rate may depend on the nature of the access point. Wi-Fi direct is a Wi-Fi standard that can function like a Bluetooth (i.e. without a wireless access point (P2P)) but with Wi-Fi speeds. So as you can imagine, it is possible to transfer a bigger chunk of data much faster without any hassle.

In addition, to share a data from one device to another, only one of the Wi-Fi devices need to be complaint with Wi-Fi Direct to establish a peer to peer connection. This usability makes it interoperable with the Wi-Fi enabled devices in the current market.

The basic idea behind Wi-Fi Direct is that simple tasks need simple connections with multiple devices. It makes use of Wi-Fi protected setup thus preventing unauthorized connections. In addition, it also has a special kind of device discovery mechanism where you will be able to identify what kinds of devices are available. For example: if you're trying to display an image, you'll only see devices that you can beam images to; if you want to print, you'll only see devices that are or that are connected to printers.


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