| 摘要 |
Embodiments disclosed aggregate a plurality of crowdsourced measurement sets for antennas received from a plurality of Mobile Stations (MS) with a Base Station Almanac (BSA), based on a measurement location estimate and a measurement location uncertainty estimate associated with each measurement set. A map comprising a plurality of map layers may be obtained, where each map layer associates locations in the BSA with spatially variable Forward Link Calibration (FLC) values for the antenna derived from the updated BSA data, wherein each spatially variable FLC value is associated with a corresponding location in the updated BSA data. Map layers, which may also include multipath map and/or received signal strength layers, may be provided to MS′ as location assistance data. |
| 主权项 |
1. A method on a Mobile Station (MS) comprising:
obtaining location assistance data comprising a map, the map comprising a plurality of map layers, the plurality of map layers comprising one or more Forward Link Calibration (FLC) map layers, wherein each FLC map layer associates a plurality of entries in a Base Station Almanac (BSA) with corresponding spatially variable Forward Link Calibration (FLC) values for signals transmitted by one or more antennas; performing, based on the location assistance data, measurements to obtain measurement sets comprising signal measurements for a subset of the one or more antennas, wherein each measurement set corresponds to an antenna in the subset of the one or more antennas; determining calibrated measurements by applying, based on the location assistance data, a calibration comprising at least one spatially variable FLC value corresponding to a first position estimate of the MS to each measurement in at least one measurement set; and determining a second position estimate of the MS and a corresponding position uncertainty based, in part, on the calibrated measurements in the at least one measurement set. |
