What is Wi-Fi Direct?
Wi-Fi Direct is Wi-Fi direct technology, which allows devices in a wireless network to connect to each other without going through a wireless router. Similar to Bluetooth technology, this standard allows wireless devices to communicate with each other in a point-to-point manner. In terms of transmission speed and transmission distance, it has greatly improved compared with Bluetooth. By definition, a Wi-Fi Direct device is a device that supports peer-to-peer connections. This device supports both basic networks and P2P connections. It can join the infrastructure network as a typical station STA and must support the Wi-Fi Protected Setup joiner function. .
In October 2010, Wi-Fi Alliance (Wi-Fi Alliance) released the Wi-Fi Direct white paper, which introduced basic information about this technology.
Features of Wi-Fi Direct
1.Wi-Fi Direct supports 802.11a, 802.11g, 802.11n, but does not support 802.11b. It is faster than ad-hoc mode and also supports WPA2 encryption mechanism.
2. The maximum transmission distance is 200 meters, the maximum transmission speed is 250Mbps, and supports 2.4GHz and 5GHz frequency bands. One-to-one and one-to-many can be implemented.
3. In theory, old Wi-Fi devices may be compatible through firmware and software upgrades, but the Wi-Fi Alliance does not guarantee that chip manufacturers will support the upgrade.
Benefits of Wi-Fi Direct
1. Mobility and portability: Wi-Fi Direct devices can be connected to each other anytime and anywhere. Since no Wi-Fi router or access point is required, Wi-Fi devices can be connected anywhere.
2. Instant Availability: Users will be able to establish a direct connection with the first Wi-Fi Direct certified device they bring home. For example, a newly purchased Wi-Fi Direct laptop can create a direct connection to the traditional Wi-Fi equipment that the user already has.
3. Ease of use: Wi-Fi Direct device discovery (Device Discovery) and service discovery (Service Discovery) functions help users determine available devices and services, and then establish connections. For example, if a user wants to print a file, they can connect to which Wi-Fi network has a printer through the above service.
4. Simple and secure connections: Wi-Fi Direct devices employ Wi-Fi Protected Setup™ to simplify the process of creating secure connections between devices. Users can easily create a secure connection by pressing a button on either device or by entering a PIN code (as displayed by the device).
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