位置与移动性密不可分。无论在室内还是室外，消费者都想知道他们在哪里，周围有哪些东西。Wi-Fi CERTIFIED Location™在室内提供达到米级的准确度。凭借Wi-Fi连接的优势，无需单独的定位基础设施或费用高昂的维护，支持Wi-Fi Location的网络和设备就可联手提供准确的定位信息。
支持Wi-Fi Location的设备帮助网络管理员、操作系统开发人员和应用开发人员提供先进的、以定位数据为主导的应用和服务。Wi-Fi Location认证确保基于标准的设备互操作性，以便开发人员能够为用户提供与室外相同的室内体验。
Wi-Fi Location不仅提高了导航定位数据的准确度，还为开发新的、功能丰富的应用和服务创造了条件。通过以下应用和服务，Wi-Fi Location可以使制造商、企业、零售和医疗保健市场受益：
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- How does Wi-Fi Location identify a device location?
Wi-Fi Location primarily uses ranging through the Fine Timing Measurement (FTM) protocol to locate a device within a network. Using the FTM Range Request and Report, an infrastructure (network) device requests a mobile device to measure and report range measurements between the mobile device and nearby access points (AP). The ranges are determined using FTM frame exchanges during an FTM session.
- Does my phone have to be associated with an access point on a network to determine location?
With Wi-Fi Location, a mobile device does not need a layer 2 or layer 3 connection with an access point (AP) to determine its location. Fine Timing Measurement (FTM) frames can be transmitted in pre-association mode once an FTM session is negotiated between a mobile device and an AP.
- Must both client and network devices be Wi-Fi Location enabled for Wi-Fi Location to work?
To gain the level of accuracy that Wi-Fi Location delivers, both devices in a measurement exchange should be certified for Wi-Fi Location.
- How many infrastructure devices are needed to accurately determine a device’s relative location?
A device usually makes use of trilateration to determine its relative location. In most cases three devices are sufficient for calculating location unless the placement of access points (AP) are aligned or are co-located.
- Is Wi-Fi Location power efficient?
Wi-Fi Location helps mobile devices conserve power by allowing a device to negotiate the scheduling and operational parameters for a Fine Timing Measurement (FTM) session, including the FTM burst interval, frequency and bandwidth of these transmissions, and number of frames in every burst.