What is WiFi Direct? Samsung - WiFi Direct

There are many terms that are incomprehensible to ordinary users, it is therefore necessary to deal with each of them. You may be interested in the question about what is WiFi Direct. This technology was announced quite a long time, it was intended to facilitate communication between two separate Wi-Fi-enabled devices. In a sense, this Bluetooth on the Wi-Fi. From the first it is characterized by greater speed and distances, and from the second – easy setup and security. And everything seems fine, but is really to deal with it.

A Little history

To understand what Wi-Fi Direct, you need to look into the past. For wireless communication, consumer devices directly used Bluetooth, which is quite simple, different, short range, low cost and reasonable energy needs. Nowadays when smartphones performance almost caught up to computers, they want something more. And here it should be noted that there is Wi-Fi, which is faster, the distance he has more, but there is an important caveat.

The Original idea was that Wi-Fi can operate in two modes: immediate, when multiple devices organize simple ad hoc network, and infrastructure involving the use of the access point, which is kind of the arbiter of the traffic. The second option eventually evolved and moved forward, and first just stuck in the nineties, which are supported far not all household devices, is characterized by low speed and vulnerability. That is, it is dangerous, uncomfortable and completely inapplicable, and therefore modern Wi-Fi just can't do without the access point.

How are things?

A household Wi-Fi so I want to simplify the lives of modern users that have home access points at the moment, almost no settings, and many of them work directly out of the box on the defaults. Many users simply don't know how to turn on WiFi. This factor allowed for a huge number of free Wi-Fi from the best Internet providers. This was the reason for such strong promotion of Wi-Fi, and spawned a lot of myths about the insecurity of such connections. All of the above has led to the fact that vendors priorities changed in favour of the simple and secure wireless network. It is here that the question arises, what is Wi-Fi Direct.

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Features

This connection method has numerous advantages:

- safe direct connection between devices similar to Bluetooth, that is just select from the list any item not thinking about the PSK and the SSID;

- the speed of such networks is much faster than traditional Bluetooth;

- allowed a much greater distance between devices;

- high degree of reliability and safety is guaranteed by the continuously running WPA2 which can't be disabled.

Implementation

So, what is WiFi Direct, it becomes clear, it remains to deal with issues associated with the intricacies of providing such access. The adoption of a new amendment to the 802.11 standard will take several years. It was decided to thread the needle within the specifications and standards currently available.

In each Wi-Fi device is actually a software access point, able to Express themselves, as well as on the device capabilities, and support WPS. Depending on what type of gadget before you can implement some additional functions, for example, routing or switching traffic.

Through the implementation of the SoftAP to the device that has support for WiFi Direct, you can connect the usual gadgets, having the opportunity to work with WPA2. Device with advanced module are able to simultaneously be connected to Wi-Di and Wi-Fi that provides tethering.

What gives?

The Result of all these developments is the user's ability to connect directly to the printer and print photos from your camera while you can just send them a digital photo frame. The guest will be able to stream video directly to your TV, you will not need to waste time to connect your local network and so on. It will all happen quickly and easily. There are already chipsets Samsung WiFi Direct as well as products from other manufacturers.

Specifications

So, if we talk about what is WiFi Direct on the hardware level it is not much different from the usual Wi-Fi module. It turns out that the technical characteristics of the new solution almost coincide with the modern wireless networks. New gadgets will be compatible with existing Wi-Fi devices. Most of the new chips involves working at a frequency of 2.4 GHz, so they should have no trouble interact with early versions of the 802.11 standard, and in some cases is expected to work with 802.11 n. The modules will operate at a frequency of five megahertz, allowing them to connect to newer networks. According to the information, you can understand that most of the chips are able to support both frequencies.

WiFi Direct – it's not always the connection “alone”

The fact that this standard is designed to connect two devices to each other, doesn't always mean that opportunities will be limited only to it. You can create a connection between entire groups of devices, for example, working on WiFi Direct in Windows 7. Such a configuration is to be used for multiplayer games. In this case, players do not need Internet access or a mobile or other cover. Even in desert conditions they can form a small wireless network, if the device will be placed within reach of each other. Not all members of the network must support this standard. Only one WiFi Direct chip able to take on the task of coordinating the traffic passing between devices with Wi-Fi modules.

It is Worth noting that sometimes the creation of groups is not possible, because some gadgets were originally created only to connect “alone”. The standard specifications it is not contrary, as the connectivity to multiple users is optional. For each device there is a description in which it is written about this parameter.