Invention Grant
US09547068B2 Methods, systems and devices for providing location based services in a venue 有权
在场地提供基于位置的服务的方法,系统和设备

Methods, systems and devices for providing location based services in a venue
Abstract:
Disclosed are methods, systems and devices for providing location based services in a venue. To estimate its location, in a particular implementation, a mobile device may obtain a measurement of a range to a transponder device positioned at a known location based on measurements of a signal round-trip time (RTT) in a message exchange with the transponder device. Positioning assistance data from a server may enable the mobile device to measure a delay at the transponder device in providing a response to a probe message to thereby more accurately measure the signal RTT.
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