Wireless Device Positioning Using Motion Sensor Fusion

The patent introduces motion sensors (accelerometer, gyroscope, magnetometer) as intermediary devices to measure device movement and orientation. These sensors serve as mediators between the device and the positioning system, enabling precise position calculation through sensor fusion algorithms that combine sensor data with wireless signal measurements, thus resolving the contradiction between coverage and precision.

The patent replaces the traditional satellite-based mechanical positioning system with an inertial measurement unit (IMU) based system. By substituting the satellite signal dependency with local inertial sensors, the system achieves precise positioning without relying on external infrastructure, thereby maintaining precision in areas with poor satellite visibility while preserving wide coverage.

The patent enables devices to perform self-positioning by utilizing their own built-in motion sensors to track their movement and orientation. This self-service capability eliminates the need for dense external positioning infrastructure, as each device independently calculates its position based on sensor data and wireless signal measurements, thereby achieving high precision regardless of base station or WI-FI hotspot density.

The patent segments the positioning function into two independent components: motion tracking (handled by device sensors) and position calculation (handled by processing unit). This segmentation allows the system to achieve precise positioning through local sensor measurements rather than relying on external infrastructure density, resolving the contradiction between infrastructure capability and positioning precision.

The patent merges the functions of motion sensing, orientation detection, and position calculation into a unified positioning system. By combining data from accelerometers, gyroscopes, magnetometers, and wireless signal receivers into a single sensor fusion framework, the system achieves high positioning precision while managing complexity through integrated processing rather than separate systems.

The patent makes the motion sensors serve multiple functions: they track device movement for positioning, determine device orientation for signal interpretation, and provide navigation data. This multi-functionality reduces the need for separate specialized components, thereby improving positioning precision without proportionally increasing device complexity.