Base Station RTK Correction for Mobile Positioning
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Solution Overview
Problem
Current mobile positioning methods in LTE systems, such as A-GNSS, OTDOA, and e-CID, fail to provide high-precision positioning, and network RTK positioning technologies require a CORS system that is limited in capacity and accessibility.
Innovation Solution
A positioning method that involves a base station receiving real-time kinematic RTK measurement values to determine correction information, which is then sent to mobile terminals for precise positioning, allowing for high-precision location determination without the need for a CORS system, and can accommodate a large number of users while reducing construction costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional positioning methods (A-GNSS, OTDOA, e-CID) are used in LTE systems, then positioning service is provided to mobile terminals, but positioning precision is insufficient to meet high-precision requirements
Solution Approach 1:
The patent combines RTK technology with mobile communication networks by integrating reference stations into the mobile network infrastructure. Base stations in the mobile network are equipped with RTK reference receivers, and correction information is transmitted through existing communication channels, merging surveying precision with mobile network coverage to achieve high-precision positioning without requiring separate CORS infrastructure
Solution Approach 2:
The patent makes mobile network base stations serve dual functions: traditional mobile communication and RTK positioning reference. The base stations provide both cellular service and positioning correction services to multiple types of users simultaneously, enabling the mobile network infrastructure to support both communication and high-precision positioning needs
2Measurement precision
If CORS system is deployed for network RTK positioning, then high-precision positioning can be achieved, but system complexity and construction costs increase
Solution Approach 1:
The patent makes mobile network base stations serve dual functions: traditional mobile communication and RTK positioning reference. The base stations provide both cellular service and positioning correction services to multiple types of users simultaneously, enabling the mobile network infrastructure to support both communication and high-precision positioning needs
Solution Approach 2:
The mobile network infrastructure serves itself by using its own base stations as RTK reference stations. The existing network resources are leveraged to provide positioning services, eliminating the need for external CORS system deployment and reducing overall system complexity
3Measurement precision
If CORS system is used for network RTK positioning, then RTK service can be provided, but the system has limited broadcast capability and cannot accommodate a large quantity of common mobile network users
Solution Approach 1:
The patent makes mobile network base stations serve dual functions: traditional mobile communication and RTK positioning reference. The base stations provide both cellular service and positioning correction services to multiple types of users simultaneously, enabling the mobile network infrastructure to support both communication and high-precision positioning needs
Solution Approach 2:
The system implements feedback mechanisms where base stations continuously broadcast correction information to mobile terminals, and the network dynamically adjusts the distribution of correction data based on user density and positioning demands, enabling scalable support for large numbers of concurrent users
4Measurement precision
If CORS system is deployed for network RTK positioning, then high-precision positioning can be achieved, but construction costs are high
Solution Approach 1:
The patent makes mobile network base stations serve dual functions: traditional mobile communication and RTK positioning reference. The base stations provide both cellular service and positioning correction services to multiple types of users simultaneously, enabling the mobile network infrastructure to support both communication and high-precision positioning needs
Solution Approach 2:
The mobile network infrastructure serves itself by using its own base stations as RTK reference stations. The existing network resources are leveraged to provide positioning services, eliminating the need for external CORS system deployment and reducing overall system complexity
Data Source
Figure 1(a)~1(b)
Figure 1(c)~1(d)
Figure 2
AI summary
Embodiments of the present invention provide a positioning method in a mobile network, a base station, and a mobile terminal, so as to perform high-precision positioning for a mobile terminal. The positioning method includes: receiving, by the first base station, an RTK measurement value for an RTK reference source; determining, by the first base station, first correction information according to the RTK measurement value, where the first correction information is correction information for positioning information obtained by the RTK reference source from a positioning system; sending, by the first base station, the first correction information to a first mobile terminal, so that the first mobile terminal determines a location of the first mobile terminal according to the first correction information. The base station includes: a receiving module, configured to receive an RTK measurement value for an RTK reference source; a processing module, configured to determine first correction information according to the RTK measurement value; a sending module, configured to send the first correction information to the first mobile terminal, so that the first mobile terminal determines a location of the first mobile terminal according to the first correction information.