Satellite Navigation Receiver Segmentation for Correction Data
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Solution Overview
Problem
The distribution and storage of correction data for satellite-based navigation systems, particularly for mobile devices, is inefficient due to the large scale and distributed nature of reference station networks, leading to privacy concerns and increased data transfer requirements.
Innovation Solution
A receiver-side device and content server system that separates correction data into geographically specific data sets, allowing devices to request and process only relevant data based on their approximate position, reducing data transfer and maintaining privacy by not disclosing precise location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If correction data from a large-scale reference station network is distributed to mobile devices, then positioning accuracy is improved, but data transfer requirements and storage needs increase significantly
Solution Approach 1:
The patent segments the correction data by dividing the service area into multiple geographic subareas, with each reference station's correction data associated with a specific subarea. Mobile devices only receive and process correction data from subareas relevant to their current location, rather than receiving all correction data from the entire reference station network. This segmentation dramatically reduces the volume of data that needs to be transferred and stored while maintaining positioning accuracy.
2Measurement precision
If correction data from distributed reference stations is transmitted to mobile devices, then positioning precision is enhanced, but privacy concerns arise due to location disclosure requirements
Solution Approach 1:
The patent implements local quality by associating correction data with specific geographic subareas rather than requiring global location disclosure. The system determines which subareas are relevant to the device's approximate position and only transmits correction data for those local subareas. This approach enhances positioning precision through localized correction while minimizing privacy risk by avoiding the need for devices to disclose their precise location to the server.
3Adaptability or versatility
If all correction data from the reference station network is made available to devices, then adaptability to different locations is improved, but device complexity and processing requirements increase
Solution Approach 1:
The patent applies segmentation by organizing correction data into discrete subarea-specific datasets. Devices can efficiently adapt to different locations by requesting only the correction data relevant to their current subarea, rather than processing all available correction data. This segmented approach maintains location adaptability while significantly reducing device processing complexity and memory requirements.
Data Source
AI summary
A receiver-side device for use in a satellite-based navigation system comprises a satellite receiver circuit for receiving signals from at least one satellite of the satellite-based navigation system, a communication interface for requesting and receiving data from a communication network, and at least one processing module. The at least one processing module is configured to: determine an approximate position of the receiver-side device; select at least one data set from a plurality of available data sets based on the determined approximate position, each data set corresponding to a predefined subarea of a service area served by the satellite-based navigation system and comprising geographically related content relevant to the respective subarea, wherein the content comprises localized correction data of the satellite-based navigation system; request the selected at least one data set and receive corresponding content relevant to the approximate position from the communication network; and process signals from the satellite-based navigation system received by the satellite receiver circuit, comprising calculating a corrected position and/or a corrected time using the received localized correction data relevant to the approximate position.