어디서든 사용 가능한 포터블 Wi-Fi®
Wi-Fi CERTIFIED Wi-Fi Direct®는 인쇄, 공유, 동기화, 디스플레이 등의 작업을 쉽고 편리하게 해주는 Wi-Fi 기기 직접 연결 기술을 지원하는 기기에 대한 인증 마크입니다. Wi-Fi Direct 인증을 보유한 제품들은 전통적인 홈, 오피스, 핫스팟 네트워크 연결 없이도 기기 간에 서로 연결이 가능합니다.
스마트폰, 카메라, 프린터, PC, 게임기 등이 서로 직접 연결되어 쉽고 빠르게 컨텐츠를 전송하고 애플리케이션을 공유할 수 있습니다. 일대일 연결, 또는 여러 대의 기기가 하나의 그룹으로 동시 연결 가능합니다. Wi-Fi Direct 인증을 보유한 기기들은 버튼을 누르거나, 두 대의 NFC 지원 기기들을 서로 태핑(tapping)하거나, 또는 PIN 넘버를 입력하는 방법으로 간편하게 연결할 수 있습니다. 또한 모든 Wi-Fi Direct 연결에는 최신 Wi-Fi 보안 기술인 WPA2™ 보안이 적용됩니다. Wi-Fi Direct는 액세스 포인트나 인터넷 연결 없이도 언제 어디서나 퍼스널 Wi-Fi 네트워크를 사용할 수 있도록 해줍니다.
내장된 옵션 서비스들을 통해 제조사에 관계없이 다양한 기기 사이에서 간편하게 파일 전송, 문서 인쇄, 미디어 재생, 스크린 디스플레이를 실행할 수 있습니다. 사용자들은 “탐색, 연결, 실행(Discover, Connect and Do)”을 한 번에 완료하여 이러한 일반 작업들을 신속하게 수행할 수 있습니다. 또한 새로운 서비스 플랫폼이 혁신적인 개발 기회를 증진시킴으로써 신규 애플리케이션들이 기기 간 직접 연결의 이점을 활용할 수 있도록 해줍니다.
인터넷 연결 없이 사용하는 Wi-Fi Direct
Wi-Fi Direct 인증을 보유한 기기들은 컨텐츠 공유, 데이터 동기화, 소셜 활동, 게임 플레이, 오디오/비디오 재생 등 Wi-Fi 기기를 통한 모든 종류의 애플리케이션에 사용 가능합니다. 인터넷 연결을 찾아 헤맬 필요 없이 더욱 쉽게 실행할 수 있습니다. Wi-Fi Direct 인증 기기는 사용자가 가진 거의 모든 Wi-Fi CERTIFIED™ 기기와 연결 가능합니다. 단 한대의 Wi-Fi Direct 기기만 있으면 그룹을 구성할 수 있습니다. 이제 Wi-Fi는 인터넷만 연결하는 것이 아닙니다. 당신과 당신 친구들이 가진 모든 Wi-Fi 기기들을 언제 어디서나 자유롭게 연결하고, 진정한 “Connected Life”를 실현할 수 있습니다.
언제 어디서나 가능한 Wi-Fi Direct 연결
Wi-Fi Direct 기기 연결은 언제 어디서나, Wi-Fi 네트워크 액세스가 없는 곳에서도 실행할 수 있습니다. Wi-Fi Direct 기기는 영역 안에 있는 다른 기기들에게 신호를 전송하여 연결이 가능함을 알립니다. 사용자는 연결 가능한 기기들을 확인하고 연결을 요청하거나, 또는 다른 기기로의 연결 초대를 수신할 수 있습니다. 2대 이상의 Wi-Fi Direct 인증 기기가 직접 연결될 경우, 이들은 Wi-Fi Protected Setup™ 및 최신 Wi-Fi 보안을 사용하여 Wi-Fi Direct Group을 형성합니다.
|Wi-Fi Alliance® "Fifteen for 2015" predictions|
|Industry-driven advances for Wi-Fi Direct®|
|와이파이 얼라이언스, 기존 와이파이 다이렉트 인증 프로그램에 새로운 기능 추가|
|Wi-Fi Direct certified products|
- Wi-Fi Peer-to-Peer (P2P) Technical Specification v1.7
- Wi-Fi Peer-to-Peer Services Technical Specification Package v1.2
- Wi Fi Direct® 엔터프라이즈 구축: P2P Wi Fi® 연결에 따른 영향 평가 (2015)
- Wi-Fi CERTIFIED Wi-Fi Direct®: 언제 어디서나 기기들을 연결하는 개인용 포터블 Wi-Fi® (2014)
- Wi-Fi CERTIFIED Wi-Fi Direct®: 개인용 포터블 Wi-Fi® 기술 (2014)
- How does Wi-Fi Alliance help ensure product compatibility and a good user experience for certified products?
Compatibility and quality are achieved through rigorous testing of Wi-Fi products. Consumers should always look for the Wi-Fi CERTIFIED logo to ensure the best user experience possible.
- What are the pre-defined services for Wi-Fi Direct?
Optional standardized services allow users to “discover, connect and do” in a single step:
- Wi-Fi Direct Send lets users send and receive content between one or more devices quickly and easily with minimal user interaction
- Miracast® connections over Wi-Fi Direct give users the ability to display photos, files and video on multiple screens through updated device and service discovery mechanisms
- Wi-Fi Direct for DLNA® lets devices discover each other before connecting to stream content on devices which support DLNA interoperability guidelines
- Wi-Fi Direct Print gives users the ability to print documents directly from a smartphone, tablet or PC with a single command
- What is the Wi-Fi Direct Toolkit?
The optional Wi-Fi Direct Toolkit provides third party developers with a standardized developer interface to the platform for building applications to run on Wi-Fi Direct connections.
- How do companies use the Wi-Fi Direct trademark?
The term “Wi-Fi CERTIFIED Wi-Fi Direct®” designates products that have been certified by Wi-Fi Alliance, and is the commercial name for the certification program. The underlying specification or technology is called “Wi-Fi Peer-to-Peer Specification”. Only products which have completed and passed Wi-Fi certification to the Wi-Fi Peer-to-Peer test plan may use the Wi-Fi Direct name. On second instance, you may refer to “Wi-Fi Direct" products (dropping the term Wi-Fi CERTIFIED). There is no special logo or visual indicator for Wi-Fi Direct.
- 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, the entry of a PIN, or tapping two NFC-capable devices together. 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.
- What is the difference between TDLS and Wi-Fi Direct?
TDLS operates in the background of a Wi-Fi network to optimize performance, while Wi-Fi Direct-certified devices can quickly connect to one another while on the go, even when a Wi-Fi network is unavailable. Many devices will be certified for both solutions and use them in different situations.
- What about power management protocols? Are devices implementing the technology behind Wi-Fi Direct a power hog?
Most Wi-Fi Direct-certified devices are power-sensitive, and in many cases, battery-powered. Wi-Fi Direct-certified devices can support the Power Save feature certified under the WMM program, and the specification underlying the Wi-Fi Direct program also defines new power saving mechanisms.
- Can a device simultaneously connect to a regular Wi-Fi network and a group of Wi-Fi Direct-certified 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-certified network. Some devices certified under the Wi-Fi Direct program support connections to both an infrastructure network and Wi-Fi Direct-certified 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-certified 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 (e.g., sharing a game application or transferring photos).
- 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.
- 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-certified 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 service discovery work?
The Wi-Fi Peer-to-Peer Services Technical Specification further defines a simplified standard for devices to advertise and discover services in nearby devices.
- How does security work for Wi-Fi Direct-certified 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-certified device provides the connection to other participants in a group of Wi-Fi Direct-certified 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.
- How far does a Wi-Fi Direct connection travel?
Wi-Fi CERTIFIED 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 CERTIFIED Wi-Fi Direct supports typical Wi-Fi speeds, which can be as high as 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.
- How many devices can connect?
A Wi-Fi Direct-certified network can be one-to-one, or one-to-many. The number of devices in a Wi-Fi Direct-certified group network is expected to be smaller than the number supported by traditional standalone access points intended for consumer use. Connection to multiple other devices is an optional feature that will not be supported in all Wi-Fi Direct-certified devices; some devices will only make 1:1 connections.
- Does the specification underlying the Wi-Fi Direct certification program work on both 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.
- Which Wi-Fi Direct-certified 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-certified 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.