Wireless Device Location Reporting Accuracy
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Solution Overview
Problem
In wireless communication systems operating at the 60 GHz band, determining the accurate orientation and location of devices is challenging due to high atmospheric attenuation and absorption, leading to ambiguities in signal direction determination.
Innovation Solution
The system employs a processing system that uses receive and transmit interfaces with multiple antennas to determine the orientation and accuracy of signal parameters, generating frames that indicate the degree of accuracy in orientation values and transmitting these frames to other devices for improved location reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple antennas are used to determine orientation and location, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the orientation determination into multiple measurement components (azimuth and elevation angles) obtained through sequential beam sweeping operations. Each antenna element or subset measures specific parameters, and the complete orientation is reconstructed by combining these segmented measurements, thereby improving precision without requiring all antennas to operate simultaneously in complex configurations.
Solution Approach 2:
The patent transitions from two-dimensional orientation estimation to three-dimensional location determination by adding the elevation angle measurement dimension. This dimensional enhancement allows the system to resolve ambiguities in orientation and achieve accurate 3D positioning, overcoming the limitations of planar antenna arrays through spatial dimension expansion.
2Measurement precision
If beam sweeping is performed to resolve ambiguities, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent performs preliminary beam sweeping operations to establish the rough orientation (azimuth angle) before conducting more precise measurements. This preliminary action narrows down the search space for subsequent elevation angle measurements, reducing the total time required for complete orientation determination while maintaining measurement precision.
Solution Approach 2:
The patent implements a two-stage measurement process where the first stage (azimuth determination through beam sweeping) provides sufficient precision for many applications, and the second stage (elevation measurement) is performed only when higher precision is needed. This partial action approach balances measurement precision requirements with time consumption.
3Quantity of substance
If 60 GHz band is used for wireless communication, then bandwidth and data transmission volume are improved, but atmospheric attenuation increases
Solution Approach 1:
The patent employs feedback mechanisms where the receiving device measures signal strength and orientation, then reports this information back to the transmitting device. Based on this feedback, the transmitting device adjusts its beamforming weights and antenna configurations to compensate for atmospheric attenuation, thereby maintaining high data transmission volumes despite the harsh propagation environment.
Solution Approach 2:
The patent dynamically changes transmission parameters including frequency selection within the 60 GHz band, beamforming weights, and antenna element activation patterns based on measured channel conditions. These parameter adjustments optimize signal propagation through the atmosphere, reducing the impact of attenuation while preserving the high bandwidth advantages of the 60 GHz band.
Data Source
AI summary
Aspects of the present disclosure provide techniques for reporting location information in wireless communications system. In some cases, an apparatus may provide an indication of a degree of accuracy in the reported values.