| 主权项 |
1. A system for improved locationing system performance in non-line of sight conditions of a mobile communication device within an environment, the system comprising:
a model of the environment including a map of a plurality of fixed transmitters within the environment, the model also includes a map of objects positioned within the environment that are capable of obstructing the signals from the transmitters, and includes mapped areas where the signal from a nearby transmitter is obstructed; a locationing engine operable to track a location of a mobile communication device moving within the environment using the signals, determine that the mobile communication device is moving into a mapped area having an obstructed signal from a nearby transmitter to be used for locating the mobile communication device, modify a locationing system parameter for that obstructed signal, and locate the mobile communication device using at least the modified signal parameter; and wherein the locationing engine modifies the locationing system parameter includes one of (a) calculating an accurate line of sight distance based on transposing a mirror image of a reflected signal path measurement, (b) weighting the obstructed signal less than signals in a line-of-sight condition, and (c) increasing a transmit power level of the obstructed signal from the transmitter, and (d) decreasing a signal detection threshold in the mobile communication device. |
