Time distance of arrival based mobile device location detection with disturbance scrutiny

摘要

Techniques for locating a mobile device using a time distance of arrival (TDOA) method with disturbance scrutiny are provided. In an aspect, for respective combinations of three base station devices of a number of base station devices greater than or equal to three, intersections in hyperbolic curves, generated using a closed form function with input values based on differences of distances from the device to pairs of base station devices of the respective combinations of three base station devices, are determined. The intersection points are then tested for robustness against measurement errors associated with the input values and a subset of the intersection points that are associated with a degree of resistance to the measurement errors are selected to estimate a location of the device.

主权项

1. A system, comprising:
a processor; and a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising:
receiving, from a device, signal information indicating a difference in arrival time of signals that were received by the device from a number of base station devices, wherein the number is an integer greater than two;for respective combinations of three base station devices of the number of base station devices, generating curve information representing hyperbolic curves generated using a closed form function with input values based on differences of distances from the device to pairs of base station devices of the respective combinations of three base station devices, wherein the differences of distances are based on the signal information and location information for the number of base station devices;determining intersection points in the hyperbolic curves for the respective combinations of three base station devices;for the respective combinations of three base station devices, introducing a deliberate measurement error into the input values resulting in modified input values;generating comparative curve information representing comparative hyperbolic curves generated using the closed form function with the modified input values;determining comparative intersection points in the comparative hyperbolic curves that respectively correspond to the intersection points; andselecting a group of the intersection points that are associated with a degree of resistance to measurement errors associated with the input values based on respective amounts of deviation between the intersection points and the comparative intersection points.