Wi-Fi CERTIFIED Wi-Fi Direct®를 사용하면 Wi-Fi 기기들을 서로 직접 연결하여 쉽고 편리하게 다른 기기로 인쇄, 공유, 동기화, 게임 플레이, 콘텐츠 디스플레이를 할 수 있습니다. Wi-Fi Direct 기기들은 기존 홈/오피스/핫스팟 네트워크 연결 없이도 서로 연결됩니다.
네트워크 액세스 없이 기기 연결
Wi-Fi Direct로 휴대폰, 카메라, 프린터, PC, 게임기에서 인터넷 연결 없이 자체 Wi-Fi 네트워크를 만들 수 있습니다. 다른 Wi-Fi Direct 기기와 기기 설정을 통해 직접 연결하여 쉽고 빠르게 콘텐츠를 전송하거나 디스플레이하고, 게임을 플레이하고, 애플리케이션을 공유할 수 있습니다. 기기를 일대일로 연결하거나 여러 대의 기기를 동시에 그룹으로 연결할 수 있습니다. 액세스 포인트나 인터넷 연결이 필요 없으므로 기기가 있는 곳이면 어디서든 Wi-Fi Direct 네트워크를 만들 수 있습니다. 기기 간 Wi-Fi Direct 연결은 Miracast®를 비롯한 여러 애플리케이션의 기본 기술입니다. 스마트폰, 카메라, 프린터, 텔레비전, PC, 게임기와 같은 수천 가지 기기들이 이미 인증을 획득하였습니다.
언제 어디서나 연결
Wi-Fi Direct 기기들은 주변에 액세스 가능한 Wi-Fi 네트워크가 없더라도 언제 어디서나 서로 연결할 수 있습니다. Wi-Fi Direct 기기는 같은 장소에 있는 다른 기기들에 연결이 가능하다는 것을 알리는 신호를 보냅니다. 사용자는 사용 가능한 기기를 확인하고 연결을 요청하거나 다른 기기로부터 연결 초대를 받을 수 있습니다. 두 대 이상의 Wi-Fi Direct 인증 기기가 서로 연결되면 Wi-Fi Protected Setup™을 사용하여 Wi-Fi Direct 그룹을 형성합니다.
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|Wi-Fi Direct certified products|
- How does Wi-Fi Alliance help ensure product compatibility and a good user experience for certified products?
Compatibility and quality are achieved through testing of Wi-Fi products. Consumers should always look for the Wi-Fi CERTIFIED logo to ensure the best user experience possible.
- How is Miracast related to Wi-Fi Direct?
Wi-Fi Direct allows devices to connect directly to each other, without the need for a Wi-Fi access point (AP). It simply requires the push of a button or the entry of a PIN. Wi-Fi Direct allows source and display devices to discover one another and provides the underlying device-to-device connectivity for Miracast. Miracast builds upon Wi-Fi Direct with mechanisms to negotiate video capabilities, setup content protection (if needed), stream content, and maintain the video session.
- How far does a Wi-Fi Direct connection travel?
Wi-Fi Direct devices work just like any Wi-Fi device, with ranges up to 200 meters. They can connect from just a few feet away, but also across a home. This means that making a Wi-Fi Direct group connection will be convenient, even when devices aren’t in immediate proximity to one another.
- How fast is Wi-Fi Direct?
Wi-Fi Direct supports Wi-Fi speeds up to 250 Mbps. Even at lower speeds, Wi-Fi provides plenty of throughput for transferring multimedia content with ease. The performance of a particular group of Wi-Fi Direct devices depends on whether the devices are 802.11a, g, or n, as well as the particular characteristics of the devices and the physical environment.
- Can a network based on devices certified under the Wi-Fi Direct program cross connect to an infrastructure network for internet connectivity?
Yes. A single device in a Wi-Fi Direct-certified group network may share internet connectivity with other devices in the network by creating simultaneous infrastructure and Wi-Fi Direct connections. A network of devices certified under the Wi-Fi Direct program operates in a security domain separate from the infrastructure network, even when cross-connected.
- How many devices can connect?
A Wi-Fi Direct-certified network can be one-to-one, or one-to-many. Connection to multiple other devices is an optional feature that will not be supported in all Wi-Fi Direct devices; some devices will only make 1:1 connections.
- Does the specification underlying the Wi-Fi Direct certification program work on both 2.4 GHz and 5 GHz frequency bands?
Yes, the specification underlying the Wi-Fi Direct certification program supports operation in both 2.4 GHz and 5 GHz. Devices operating in the 2.4 GHz frequency band only and devices operating in both the 2.4 GHz and 5 GHz frequency bands can be certified under the Wi-Fi Direct program. Not all Wi-Fi Direct-certified devices support both frequency bands, however, so you should check which bands your devices support.
- What about power management protocols? Are devices implementing the technology behind Wi-Fi Direct a power hog?
Most Wi-Fi Direct devices are power sensitive, and in many cases, battery powered. Wi-Fi Direct devices can support the Power Save feature certified under the WMM® program, and the specification underlying the Wi-Fi Direct program also defines power saving mechanisms.
- Which Wi-Fi Direct device will create and manage the connection?
Devices conduct a negotiation to determine which device is most appropriate. This may be determined by considering a number of factors including but not limited to power management, number of connections supported, richness of user interface and services being offered. The Wi-Fi Direct device that offers the connection manages the creation, admission to, presence, and termination of that network implementing the specification underlying the Wi-Fi Direct program.
- Can a device simultaneously connect to a regular Wi-Fi network and a group of Wi-Fi Direct devices at the same time?
All devices certified under the Wi-Fi Direct program allow the user to connect to an infrastructure or a Wi-Fi Direct network. Some devices certified under the Wi-Fi Direct program support connections to both an infrastructure network and Wi-Fi Direct group at the same time (e.g. a laptop may support an infrastructure connection while also belonging to a Wi-Fi Direct-certified group). Simultaneous connection to a Wi-Fi Direct group and an infrastructure network is an optional feature.
- If I make a Wi-Fi Direct group with another person, can they see all of the contents of my device?
Not without your permission. The content available over a Wi-Fi Direct group connection is driven by the applications you are using. While there may be applications which allow an authorized use to “browse” the content on your device, most applications will have a specific focus, such as sharing a game application or transferring photos.
- Do products certified under the Wi-Fi Direct program interoperate with my other Wi-Fi devices?
Yes. A Wi-Fi CERTIFIED Wi-Fi Direct device is able to make device group connections with existing Wi-Fi CERTIFIED™ gear.
- Can all devices start a network based on the specification underlying the Wi-Fi Direct program?
All Wi-Fi Direct devices can start a group, based on the specification underlying the Wi-Fi Direct program, but it’s most likely that devices with more computing power (laptops, handsets, gaming devices) will more frequently manage the network than those with less power (digital cameras, printers, etc.).
- How does security work for Wi-Fi Direct products?
Group networks based on the specification underlying the Wi-Fi Direct program operate in a security domain that is independent from any infrastructure network. This means that they have protection of the security features certified under the WPA2 program, but are managed separately from the security system in the AP-based network (home, enterprise, hotspot). This means both the group networks based on the specification underlying the Wi-Fi Direct program and the infrastructure networks can be protected, but users don’t need credentials for the infrastructure network to connect to the network based on the specification underlying the Wi-Fi Direct program.
- How does the specification underlying the Wi-Fi Direct certification program work?
The underlying specification connects devices using an approach similar to the traditional AP-to-client connection used in Wi-Fi CERTIFIED infrastructure networks. One Wi-Fi Direct device provides the connection to other participants in a group of Wi-Fi Direct devices in lieu of an AP. A device certified under the Wi-Fi Direct program does not require special hardware compared to traditional Wi-Fi AP devices.