GNSS Correction Data Repackaging for Broadcast Efficiency
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Solution Overview
Problem
Current methods for providing correction information for precise location determination in user equipment (UE) using global navigation satellite systems (GNSS) are inefficient, particularly in broadcasting correction data that requires two-way communication and has delays, such as in PPP-RTK methods, and are not optimized for broadcast scenarios.
Innovation Solution
A method and apparatus for repackaging grid data from a correction service to transmit optimized correction information to user equipment, including determining the nearest grid point and removing irrelevant satellite information, allowing for efficient broadcast of correction data via system information blocks without the need for two-way communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If full grid data is transmitted to provide comprehensive correction information, then location accuracy is improved, but data transmission size and time increase
Solution Approach 1:
The patent extracts only the necessary correction data for visible satellites from the complete grid dataset. The network device determines which satellites are visible to the UE and transmits only the correction information relevant to those satellites, eliminating redundant data transmission while preserving location accuracy.
Solution Approach 2:
The correction data is segmented by satellite visibility. Instead of transmitting a unified correction dataset, the patent divides the data into satellite-specific correction information and only transmits the segments corresponding to visible satellites, reducing overall data volume.
2Reliability
If comprehensive grid data is transmitted, then correction completeness is improved, but device complexity and processing overhead increase
Solution Approach 1:
The network device extracts and transmits only the correction parameters necessary for visible satellites. This extraction process reduces the complexity of data handling at both the network and UE sides, as the UE receives a streamlined dataset that requires less processing while maintaining correction completeness for the relevant satellites.
Solution Approach 2:
The patent applies local quality by providing differentiated correction data based on satellite visibility. Each visible satellite receives its specific correction information tailored to its signal characteristics and geometric relationship with the UE, rather than applying a uniform correction approach to all satellites.
3Reliability
If two-way communication is implemented for correction data, then communication reliability is improved, but communication delay increases
Solution Approach 1:
The network device performs preliminary determination of visible satellites and prepares the appropriate correction data in advance of the UE's location calculation request. This preliminary action allows the UE to receive ready-to-use correction information without initiating a two-way communication exchange, thereby reducing delay while maintaining reliability.
Solution Approach 2:
The system enables self-service by having the network device autonomously determine satellite visibility and select appropriate correction data without requiring interactive communication with the UE. The correction service operates independently, retrieving and transmitting relevant data based on pre-determined visibility information.
Data Source
AI summary
A method for providing correction information includes receiving, by a processor, grid data from a correction service, repackaging the grid data, and transmitting the repackaged grid data to a user equipment.