Buzz
The prevalence of devices supporting Wi-Fi Direct (Direct Wireless Connection) is growing. Thanks to Wi-Fi Direct technology, two devices (TVs, smartphones, tablets, laptops, etc.) can connect directly with ease, eliminating the need for routers or other network devices.
1. How does Wi-Fi Direct work on TVs? What is the process of establishing connections?
Increasingly, numerous devices support Wi-Fi Direct (Direct Wireless Connection). With Wi-Fi Direct technology, two devices (TVs, smartphones, tablets, laptops, etc.) can connect directly with each other effortlessly, without the need for routers or other network devices.
Wi-Fi Direct Concept
Typically, in your home, the router acts as the hub of the internal network. This means that all devices (Smart TVs, smartphones, tablets, computers, etc.) must connect to the router to communicate with each other and access the Internet. Without a router, wireless connections between devices would be impossible, or you'd have to set up peer-to-peer (ad hoc) connections through complex configuration steps.
Wi-Fi Direct serves as the solution to the aforementioned issue. This Wi-Fi standard allows two devices to effortlessly connect without undergoing complex setups, eliminating the need for an independent router. You might be using a Wi-Fi Direct-enabled device without even realizing it. Android versions from 4.0 Ice Cream Sandwich onward support Wi-Fi Direct, and even the AirDrop feature on iOS 7 and later is built on the Wi-Fi Direct standard.
Furthermore, Wi-Fi broadcasting from smartphones for other devices' internet access or wireless printing technology on your printers may likely be built upon Wi-Fi Direct. The market is witnessing an increasing number of devices embracing Wi-Fi Direct support.
Wi-Fi Direct facilitates devices and accessories to autonomously connect with each other
In the illustrated image, you can spot a Wi-Fi network named 'DIRECT-roku-894.' Accessing this network is impossible as it requires no password. In reality, this is a Wi-Fi Direct network between the Roku TV decoder and its remote control. When the remote control connects to the decoder through the 'DIRECT-roku-894' network, the devices automatically exchange passwords.
Thus, Wi-Fi Direct allows two devices to connect directly via Wi-Fi without going through complex setup steps. No manual password entry is needed for the remote control and decoder, as the connection happens entirely automatically. Most importantly, both the decoder and remote control don't need to connect to a router to communicate with each other.
Other Benefits of Wi-Fi Direct
The wireless screen casting standard Miracast is built upon Wi-Fi Direct. Unfortunately, Miracast hasn't achieved significant success as manufacturers haven't released many Miracast-compatible devices.
Accessories for computers, such as mice, keyboards, or printers, can directly connect to computers without the need for a router. Currently, Wi-Fi connectivity is prevalent across various devices. If Wi-Fi Direct becomes widespread, there might be no need for other connections (like Bluetooth) and dedicated transmitters to pair devices.
Illustration: TV connecting to a smartphone, tablet via Wi-Fi Direct
How Wi-Fi Direct Operates
Wi-Fi Direct leverages various technology standards to fulfill its mission:
- Wi-Fi: Wi-Fi Direct utilizes the familiar Wi-Fi technology commonly used to connect computers and mobile devices to routers. If your device supports Wi-Fi Direct, it can function as a true router: Other devices can connect directly to the Wi-Fi network created by this device. You can establish peer-to-peer connections (ad-hoc) between Wi-Fi-enabled devices, although ad-hoc connections are relatively complex and less user-friendly compared to Wi-Fi Direct.
Wi-Fi Direct Device and Service Discovery Protocol: This protocol allows devices to discover and identify network services and other devices supporting Wi-Fi Direct. For example, your Galaxy S4 smartphone can find a list of all nearby smart devices supporting Wi-Fi Direct, including printers, and more.
Wi-Fi Protected Setup: When two devices connect, they undergo a setup process called WPS (Wi-Fi Protected Setup).
WPA2: Wi-Fi Direct employs the WPA2 encryption, the strongest Wi-Fi encryption type.
Wi-Fi Direct is also known as Wi-Fi P2P (peer-to-peer), as it establishes a peer-to-peer connection. Two Wi-Fi Direct-enabled devices can connect without the need for a router.
The Future of Wi-Fi Direct?
Can you use Wi-Fi Direct right now? It depends on the devices you own. If your devices and accessories are equipped with Wi-Fi Direct, they will autonomously utilize Wi-Fi Direct without requiring your assistance.
However, currently, the number of devices supporting Wi-Fi Direct remains relatively low. Moreover, compatibility issues have not been well addressed by manufacturers. For example, two laptops from different manufacturers, both equipped with Wi-Fi Direct, still struggle to share files seamlessly. You also lack a convenient way to connect from an Android smartphone to a Windows laptop, as envisioned by the initial goals of Wi-Fi Direct.
Presently, Wi-Fi Direct functions quite well on some devices. Still, this connectivity standard has a long way to go before becoming a truly widespread and convenient standard like Bluetooth. Although it works as expected on devices designed to be compatible (such as accessories from the same manufacturer), let's eagerly anticipate the day when this connectivity standard becomes more prevalent in the future.
(Source: vnreview)
