GNSS Case Intermediary for Mobile Positioning Precision
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Solution Overview
Problem
Mobile devices face challenges in determining precise position information efficiently, leading to imprecise location data and high energy consumption.
Innovation Solution
A case with a GNSS receiver component is used to determine its own position and transfer relevant information, such as satellite IDs, frequency errors, and signal strengths, to a mobile device via low-power communication, enabling the mobile device to perform satellite fix operations more efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the mobile device performs satellite fix operations independently, then positioning precision can be achieved, but energy consumption increases
Solution Approach 1:
A case with GNSS receiver component acts as an intermediary device. The case performs satellite fix operations and transfers positioning information to the mobile device, enabling the mobile device to achieve precise positioning without independently performing energy-intensive satellite fix operations
Solution Approach 2:
The case creates a copy of the positioning capability by performing satellite fix operations itself and then transferring the obtained positioning information to the mobile device, allowing the mobile device to benefit from precise positioning without having its own GNSS receiver actively working
2Measurement precision
If the mobile device performs satellite fix operations, then positioning information can be obtained, but exposure to electromagnetic radiation increases
Solution Approach 1:
The case serves as an intermediary that performs satellite fix operations and transfers positioning information to the mobile device, thereby eliminating the need for the mobile device to directly interact with satellite signals and reducing electromagnetic radiation exposure
3Loss of information
If standard communication protocols are used between case and mobile device, then data transfer can occur, but energy consumption increases
Solution Approach 1:
The system changes the communication parameter from standard Bluetooth to Low Energy Bluetooth (LE Bluetooth), which consumes significantly less power while still enabling effective data transfer between the case and the mobile device
Data Source
AI summary
A mobile device uses information from another mobile device to perform satellite position fix operations. The information enables the mobile device to perform the satellite position fix operation with less power. Additionally, the information enables the mobile device to determine a position of the mobile device more precisely at significantly lower power consumption. Example methods include receiving, via a wireless communication protocol, an indication of a space vehicle identification (SVID) and an indication of a frequency error for a space vehicle indicated by the SVID and performing an acquisition procedure for the space vehicle using the frequency error as a starting frequency. The method may further include receiving a ratio of the carrier power over the noise power for a unit bandwidth (C/N), determining an integration time based on the C/N, and performing the acquisition procedure for the space vehicle using the frequency errors as a starting frequency error and using the integration time.