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What does wifi direct mean. WiFi Direct - what is it? How to set up and how to use WiFi Direct? If something doesn't work

Wi-Fi Direct how to transfer files. Do you have a Samsung Galaxy smartphone and don't know how to transfer files via wifi direct at high speed? In this article, we will see how this is done on almost all androids.

If your Samsung Galaxy smartphone supports Wi-Fi Direct function, then you can transfer large files at high speed, if you compare the transfer speed of Bluetooth and wifi direct, then the bluetooth is resting. You can transfer files via Wi-Fi Direct not only from phone to phone, but also from phone to computer or from smartphone to laptop or tablet. The main thing is that the transmitted and received devices supported the wifi direct function.

This function is very useful on those smartphones that do not have a memory card, for example, you want to transfer a movie in good quality from a computer to a smartphone, and accordingly it weighs more than one GB and it will take a very long time to transfer such a movie via bluetooth. And if you send the same file from computer to smartphone via Wi-Fi Direct, then it will be much faster. The main thing is that both devices must support this function.

You can pre-establish a connection between the two devices from which you want to send and receive a file. To do this, go to the settings and select the Wi-Fi item. Next, activate it, and then click on the menu in the form of three dots.

Next, a menu will open where we select Wi-Fi Direct and look for available devices. Turn on Wi-Fi Direct on the receiving device to discover it. When you see on the screen the desired device to which you want to transfer the file, you need to select it. On the receiving device, confirm the connection with your android Samsung Galaxy.

Let's see how to enable Wi-Fi Direct on Samsung Galaxy Android and how to transfer files to another smartphone or other device that supports Wi-Fi Direct.

Using an example, we will see how to transfer a file from the gallery via wifi direct:
Open the gallery and select any photo, video or just a picture by touching it, after which you will see a menu at the top of the screen with possible actions for the selected file. Choose an icon that allows you to transfer the selected file in various available ways. See the attached screenshot below.

In the menu that opens, select the icon labeled Wi-Fi Direct.

After confirming the inclusion of Wi-Fi Direct on the android, it will start searching for other devices. To find another device, you need to turn on Wi-Fi Direct on that device. After you find an available device and select it, a notification will appear on the received device receiving a file via wifi direct, needs to be confirmed. Next, the transfer process from your smartphone to another smartphone or other device will begin.

I hope this article helped you and you were able to find the information you need.
Don't forget to leave a review if this article helped you or not. Please indicate the model of the device to which this method came up or did not fit. I wish you all good luck!!!

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Every year there are more and more new technologies that are designed to improve and make our lives easier. One of them is WiFi Direct. What it is, it will become clear if we take a closer look at the technology itself and the principle of its operation. Devices that support this method of communication are capable of transmitting data at high speeds - up to 250 megabits per second, and at a fairly large distance - up to 200 meters. And the reliability of the network is ensured by a higher degree of channel protection. To build a network on this basis, a router is simply not needed.

Key Features

Worth a closer look at WiFi Direct. What's this? This is a new information transfer standard that allows several gadgets to connect to each other without the use of a router or other network device. It is not necessary for a person to participate in this process, since the devices are able to automatically detect each other. So far, this is not even a standard, but a certification. Currently, two devices can only connect wirelessly using a router as an intermediate link. However, a router is no longer required if you use WiFi Direct. What it is, and how such a method works, is discussed here.

This method allows you to connect several gadgets at the same time. In addition to devices such as standard laptops, smartphones and phones, digital photo frames, scanners, printers, video recorders, etc. can be connected to the network, and here the main condition is the presence of an appropriate chip.

As it was before?

Home networks have already been subjected to the introduction of similar services and protocols several times. Among the currently existing WiFi Direct is considered the most promising development, which has only one obstacle to development - the reaction of consumers.

Some have the opinion that this standard will soon completely replace the well-known Bluetooth, which is quite popular at the moment. So, if we consider WiFi Direct, what it is, it will become clear after determining the advantages of such a solution in comparison with traditional Bluetooth. Here we can talk about a higher data transfer rate, increased distance, as well as reliable channel security. However, there are also disadvantages that are quite significant.

Characteristics

WiFi Direct chips are worth considering. How to use this technology will become clear later. Elements can be one of two types: for the range of 2.4 GHz, 5 GHz, and simultaneously supporting both of these values.

The technology has a couple of useful features: Device Discovery and Service Discovery. With their help, gadgets not only find each other and connect to a network without any human intervention, but also allow you to learn about the capabilities of each device. For example, if you need to transfer an audio file from a smartphone somewhere, then the list of receiving devices will contain only those that are able to accept and use this type of data, and all the rest will simply be excluded from it. This allows the user not to scroll through the entire list presented in search of a suitable gadget, but only to select the desired one from those that are displayed.

Difference from other types

A typical WiFi network assumes the primacy of an access point that controls all other devices. The WiDi network also has a coordinator, but this function is transferred from one device to another, depending on the power, autonomy, and functionality. So, the list of preferences looks like this: laptops, tablets, smartphones, consoles, and after them come peripherals, such as printers, audio systems, digital cameras and others.

disadvantages

So, now you understand what WiFi Direct is; how to use it is also no longer a question. It is worth dealing with its shortcomings. It is they who question the development of technology and its popularity.

Main disadvantages

  • Ether clutter. When a wireless network is organized in the usual way, all devices are connected to one access point. In this sense, we can talk about the big difference between WiFi Direct. How to set up such a network? Pretty simple. Here we can talk about the simultaneous creation and operation of several networks in which gadgets communicate with each other, transmitting data. This leads to the fact that, for example, several tens or hundreds of networks will operate in a multi-storey building, creating a real mess on the air, since they all broadcast with different powers and frequencies. Such networks cannot be controlled, which is why they create a real clutter of the air.
  • Poor network security. While manufacturers of WiFi Direct Android devices talk about better security of such networks compared to Bluetooth, in fact, everything is different. As long as such a gadget is used exclusively on the home network, we can talk about its security, but as soon as you come with it to the company's office, where it will find other devices and connect to them, a problem already arises. WiFi Direct for Windows can be used as a proxy to receive data from any of the devices on the network, and even corporate information. It will be difficult for any specialist to control all the networks created by such a device, which will gradually lead to a ban on this standard in enterprises. As a result, it may remain popular only for home use, or disappear altogether.
  • High energy consumption. On the one hand, it can be used to transfer large amounts of data over long distances and at high speeds. However, modern gadgets discharge so quickly that such an additional load may well become a burden.
  • Increased range of such technology is not always an advantage. Your network can be hacked from a great distance, they can break into it and use it against you.
  • Using WiFi Direct involves the use of a special chip, since simple WiFi is not suitable for these purposes. At the moment, there are gadgets that are equipped with both chips, but there are not very many of them.

conclusions

The main inconvenience of implementing such a technology is that its support is provided by a separate chip that differs from traditional WiFi. And since not many manufacturers include such modules in their devices at the moment, users will not want to buy new gadgets to use this technology.

Wi-Fi Direct, also called Peer-to-Peer, is the top seven protocol stack of the OSI model. In other words, a set of rules governing the interaction with low-level services of programs with a user-facing interface. These standards are designed to direct device connection to each other, bypassing the routing equipment, and allowing the establishment of complex decentralized structures.

Features of the technology and how it works

This technology uses familiar to all modules operating at frequencies of 2.4 GHz and 5 GHz within the common 802.11 a / b / g / n specifications. In fact, this is a refinement of the SoftAP mode. A software access point is created and with the help of the same WPS others are tied to it.

The new standard supports the same speed as the regular one, that is, up to 250 Mb/s. Although at lower speeds, the throughput is more than sufficient for the most demanding content. The performance of the created P2P space depends on whether the equipment is used: 802.11 a, b or n and on the profile of its electromagnetic environment (other sources of interference).

The range of Wi-Fi Direct is the same as that of a regular one - no more than 250 meters.

The number of participants in the group, united by the new protocol, cannot be as large as in the star topology. Plurality of connections only some devices with this function, for example, smartphones, are provided. There are also those that can use only one channel.

Each gadget with this system automatically detects potential "interlocutors". It sends information with a list of its own services and receives similar signals from neighboring ones, analyzing their content. To establish a connection between devices, just select the one you need from the list and press the button. All P2P connected devices are ranked according to processing power. Management is more often in those that have greater productivity (laptops, mobile phones, game consoles). They possess extended administrative powers compared to digital cameras, printers, photo frames and other similar digital assistants. However, absolutely everything that works with P2P is capable of initiating the creation of an appropriate environment. Moreover, devices with conventional modules can also be added here.

Digital assistants, for which this new technology is native, can simultaneously reside both in their community and in the central infrastructure formed by the router. Multi-vector is optional and, for example, is typical for laptops and smartphones.

Also, any of the members of Wi-Fi Direct is able to access the Internet by connecting to the host, while remaining in a common secure domain for all. Secure Domain is a zone protected by the WPA2 certification program that uses the router's access point to access the Internet and manages it separately from the rest of the intranet.

Another participant without the permission of someone else's operating system cannot see the list of its contacts. The amount of publicly available information depends on the actual application that users are running. So LAN games initially ask for permission to identify themselves and get the right to look for similar inclusions. The same can be said about photo and image services.

Advantages and disadvantages

Direct "communication" of all "smart" devices gives a serious time saving. Obviously, sending something to print from a tablet directly using Wi-Fi Direct technology is much easier than “throwing” it onto a Windows 7/8/10 computer and then sending it to a USB printer. Showing a photo or video from your phone using a large TV screen is more convenient if you send it directly to your destination. Various photo frames, projectors become more interactive, the online component is diversified for games, and Internet access is more flexible.

To disadvantages may include the following:

  • air clogging. There are a lot of multidirectional “negotiations” in the “point-to-point” style, and peripherals are added to them, which creates a mess on the radio;
  • dubious security in places saturated with digital technology (offices, shopping centers, railway stations and airports). Numerous signals create a complex topology, in which each participant has dozens of connection options and the ability to use neighbors as proxies;
  • power usage. The signal strength makes great demands on the power supply. Autonomy is reduced;
  • Availability special chip, which allows you to initiate a subsystem.

Ordered Signal Streams

Exists two main sets rules of local circulation of large volumes of data. These are DLNA and Miracast. However, the latter is the most appropriate in this case. For each of them, leading manufacturers have developed a lot of programs.

DLNA supported multimedia traffic: video, photo, music. For its operation in wireless mode, a central switch with an access point is required. The transmitting device acts as a server, on which a special program creates a server. The client simply displays the image on the screen. So the software installed on the computer with DLNA uses the central switch to use the large TV screen.

Miracast can operate in a point-to-point mode and, in addition to providing transport for typical audio and video files, can stream a desktop image. The developers have provided functionality that ensures smooth playback of the video stream and the absence of desynchronization. The establishment of contact and the beginning of the exchange of signals occurs in a couple of touches. The video signal is broadcast using the H.264 codec in Full HD. The sound is processed in AC3 format in 5.1 format. A separate plus is the support of the standard by all smartphones equipped with an operating system starting with Android 4.2.

How to turn on "Wi-Fi Direct"

You can verify that the function is present by going to wireless network settings on an Android phone. Usually the corresponding sub-item is displayed there. It is in the detailed menu of this subsection that you can find all possible connections, select the one you need and connect. Now in the explorer the file circulation will become active directly.

WiFi Direct in Windows 10 is included in the network connection properties. We are looking for a device that supports this technology and connect to it.

As an expected step towards simplifying the operations performed by the user with a variety of electronic devices, the technology remains crude. It certainly works, it can be used, and, in itself, it does not cause any complaints. But the lack of software and the paucity of equipment with a specialized chip certainly delays its widespread distribution. Let's hope that the time when this area will finally be put in order is not far off.

Wi-Life comment: this technology is intended for personal use or use in small groups, and, it can be said, speaking on this topic, we are somewhat deviating from the main direction of the resource. Nevertheless, Wi-Fi Direct may well become a common and convenient addition to corporate Wi-Fi network infrastructures, so we decided to cover this topic on our website.

The Wi-Fi CERTIFIED Wi-Fi Direct™ mark marks devices that support a new technology that allows devices to connect directly. This makes it possible to significantly simplify tasks such as printing documents, sharing documents, synchronizing and displaying information. Devices bearing this mark can communicate with each other directly and without the need to join a traditional WiFi-standard home or office network.


Mobile phones, cameras, printers, computers, gaming devices can now connect directly to transfer content (transfer) and share applications quickly and easily. Connecting devices certified as Wi-Fi Direct is very simple and is done at the touch of a button. In this case, only one device is required to support Wi-Fi Direct. Any other wireless equipment can be used to connect to it and then exchange data. All WiFi Direct connections are secured with WPA2, which is the most advanced wireless security technology in WiFi (). Wi-Fi Direct allows devices to communicate directly with each other without an access point, and there is no need to look for access to the Internet.

In what cases is it usedWi- fidirect


Devices with Wi-Fi Direct can be used for all types of applications - share content (collaboration with information), synchronize data, communicate on social networks, play games, listen to music or watch videos, etc., i.e. do all the same things you do with Wi-Fi devices today, only easier and without the need for an internet connection. Wi-Fi Direct certified devices can form connections with virtually all certified and standardized Wi-Fi devices that your friends or acquaintances already have. You only need one WiFi Direct enabled device to form a group. Now networks based on the Wi-Fi standard are not just an access medium with the main task of accessing the Internet, but it ensures that you interact with your friends everywhere.

According to recent research, users around the world said they would like to use Wi-Fi Direct to chat, share photos, display photos from portable devices on a monitor or TV screen, use video chat, and play video games together outside the home, for example , in public transport.

How WiFi Direct works

It is important to reiterate that the use WiFi Direct possible without the presence of any network WiFi. All you need is at least two devices. You may see available devices and request to connect with them, or you may receive an invitation message to join from another Wi-Fi Direct device.


In this case, the search functions for devices and services are used. Wi-Fi Direct: Wi-Fi Direct Device Discovery and Service Discovery , which allow users to set available devices and services before establishing a connection. For example, if the user wants to print a document, then he can find out which Wi-Fi networks the printer supports.

A Wi-Fi Direct certified device can establish peer-to-peer connections such as P2P, and can also participate in infrastructure-like scenarios. WiFi Direct devices can join standard networks Wi Fi like regular Wi-Fi devices. WiFi Direct devices can form point-to-point (one-to-one or peer-to-peer) or point-to-multipoint (one-to-many) topologies. The last option is similar to the BSS model.

Devices can participate in the Group as certified for WiFi Direct , and just having the usual WiFi certification. However, only the device can form and maintain a group. WiFi Direct. Regular Wi-Fi devices can only be clients in this group.

When two or more Wi-Fi Direct certified devices establish a connection, they form WiFi Direct group using technology Wi-Fi Protected Setup (simplified establishment of a secure connection in Wi-Fi ( approx. Wi- life. en) and state-of-the-art security mechanisms WiFi . For safe use Wi-Fi Protected Setup either press the corresponding buttons on both devices at the same time, or enter PIN -the code. After that, you can start doing whatever is necessary.

Р2Р technologies (Peer - to - Peer ) play an important role in cases where a fast connection is needed.

Let's look at some examples of how Wi-Fi Direct is used to provide additional user experience:

A student in a hostel needs to print out the assignment before coming to the audiotorium. Her laptop is authorized to access the university's Wi-Fi network, but she is not authorized to connect and use her printer to the Wi-Fi network. In this typical situation, a student can print documents on the printer directly using Wi-Fi Direct and at the same time check mail through the university's Wi-Fi network.

Friends have gathered for a party, film each other on the cameras of their smartphones and share photos with everyone.

-An employee of the company was on a business trip with his tablet or lightweight netbook, and then, upon arrival, in a simple way, synchronizes the files he created with his corporate laptop

In all these cases, Wi-Fi Direct will be an excellent technology that makes life easier.

One of the main sources that served as the basis for this article is (eng).

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The connection of modern devices, whether it be a laptop, a smartphone or a smart TV, is technically not a problem today. Another thing is that if every TV or modern laptop has an HDMI connector, then in smartphones, ultrabooks and similar equipment, the constructive placement of this port is not always justified. And this means that it is not always possible to effectively use the wired connection familiar to the user. Yes, and a wired connection, although it works great, still causes some inconvenience due to the length of the cable, the inability to send a file to a new device without having to plug the cord into the port physically.

The exchange of information between devices in this version is possible only through the cord. And when there are a lot of them, this is not only inconvenient, but also leads to port failure over time due to constant cable reconnections to betray the file. Therefore, the universal Wi-Fi Direct wireless technology was developed, which allows you to establish a full-fledged network connection between devices. It is also very convenient to include them in a common network due to the provision of maximum data exchange speed.

The ability to connect any equipment to the home network

Wi-Fi Direct allows wireless connection between any devices that support this technology. Smartphones manufactured by Samsung are easy to connect to a modern LG smart TV to set it up to display information stored in a mobile device.

But, the ability to use the TV as an additional display is not the only function of this technology. Wi-Fi Direct is the ability to connect gadgets such as cameras, printers to the receiving device in order to print the desired file without using wires. The same opportunities have gaming and any certified mobile devices that have an antenna for a Wi-Fi connection. Today, this sign can be found on household appliances manufactured by Samsung, Sony, LG and other well-known companies.

Wireless antenna - the norm for modern technology

This wireless technology offers to set up any modern LG or Samsung TV to receive and display information on the screen without using a cord. At the same time, in order to connect the devices to the network via a wireless connection, you need to make a couple of clicks, and after that it works without failures.

Wi-Fi Direct creates a separate channel between devices that operates separately from the standard office wireless network. In addition, in order to connect devices to this network, it is enough that Wi-Fi Direct connection is supported only on an LG TV or, for example, a Samsung smartphone. The rest of the equipment is connected to them using standard modules, where there is a wireless antenna that operates on standard protocols.

The ability to watch video file format in HD-quality on anything

You can take advantage of Wi-Fi Direct wireless connectivity for any type of application. Transfer any necessary file, synchronize data, use the TV as a second monitor, connect a media player, turn on the display of a network resource on a large screen - all this allows the considered wireless option. Devices that support this protocol allow you to create a separate workgroup and enjoy the benefits that follow from this.

Today, a wireless antenna is implemented in hardware in almost every modern media device. And after Samsung and LG have launched more than one smart TV that has a wireless antenna, connecting it to the latest Samsung smartphone or LG laptop is easy and very convenient. Now any video file in HD, 3D and other formats can be studied not through a small display of a mobile device, but on a high-quality large screen of a modern smart TV.