Base Station Forwarding for High-Precision Mobile Positioning
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Solution Overview
Problem
Current positioning methods in LTE systems, such as A-GNSS, OTDOA, and e-CID, fail to meet high-precision positioning requirements, and the network RTK positioning technology relying on CORS systems is limited in accommodating massive mobile users due to its limited broadcast capability.
Innovation Solution
A method that involves a server obtaining correction information from a CORS system and forwarding it to a base station, which then sends this information to a mobile terminal to correct its positioning data, using techniques like MAC unit differential corrections and VRS differential corrections to enhance positioning precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If network RTK positioning technology is implemented based on CORS system, then positioning precision is improved, but the system cannot accommodate massive common users of mobile network due to limited broadcast capability
Solution Approach 1:
The patent segments the correction information delivery process by introducing multiple base stations as intermediate nodes. Each base station receives correction information from the CORS system and independently broadcasts it to mobile terminals in its coverage area, dividing the single-point bottleneck into multiple distributed delivery points that can simultaneously serve different user groups.
Solution Approach 2:
The patent introduces base stations as intermediary devices between the CORS system and mobile terminals. The base stations receive correction information from the CORS system via the server, process and forward this information to mobile terminals, thereby extending the CORS system's reach to accommodate massive mobile users without overloading the original broadcast channel.
2Measurement precision
If correction information is obtained and forwarded through server and base station, then positioning accuracy is improved, but system complexity increases
Solution Approach 1:
The patent makes base stations perform multiple functions: they continue to provide traditional mobile communication services while simultaneously receiving, processing, and broadcasting correction information for positioning. This multi-functionality avoids adding separate dedicated infrastructure, thereby limiting the increase in system complexity while achieving improved positioning accuracy.
Solution Approach 2:
The patent enables base stations to autonomously receive correction information from the server, process it locally, and broadcast it to mobile terminals without requiring direct intervention or complex coordination from the CORS system. This self-service approach simplifies the overall system architecture by distributing the processing load to existing infrastructure components.
Data Source
AI summary
Embodiments of the present invention provide a positioning method, the positioning method includes: obtaining, by the server, first location information, where the first location information is used to indicate a location of the base station; obtaining, by the server, correction information for the base station according to the location of the base station; and sending, by the server, the correction information to the base station, so that the base station forwards the correction information to the mobile terminal, and the mobile terminal determines a location of the mobile terminal according to the correction information.