| 摘要 |
<p>The present invention provides a positioning method, device and system, which are applied to indoor WLAN positioning. A positioning server obtains location service information of APs in a set of APs to be measured; selects three APs to be measured in the set of APs to be measured according to a preset rule, and calculates a first coordinate of a terminal; obtains a calculated RSSI value of any unmeasured AP in the three APs to be measured at the first coordinate according to a preset propagation model signal graph; determines that signals of the unmeasured AP are not affected by reflection if the calculated RSSI value of the unmeasured AP is not smaller than a difference between the measured RSSI value and a preset threshold, and determines, according to the identifiers of the APs, whether all the three APs to be measured have been measured; and uses the first coordinate as a location coordinate of the terminal if all the three APs to be measured have been measured, thereby positioning the terminal.</p> |
