Ground Pseudo-Satellite Wireless Positioning for Indoor Accuracy
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Solution Overview
Problem
Current wireless positioning technologies, such as GPS and LTE systems, face challenges in achieving high-accuracy positioning, especially indoors, due to signal loss and interference, leading to positioning errors in the range of hundreds of meters to thousands of meters, which are not satisfactory for both indoor and outdoor applications.
Innovation Solution
The introduction of a new wireless positioning mode that utilizes additional positioning network elements to perform UE-based positioning calculations using time information from positioning signals transmitted by PSSs, reducing dependence on communication networks and improving positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS positioning technology is used, then outdoor positioning can be achieved, but indoor positioning accuracy deteriorates due to signal loss
Solution Approach 1:
The patent introduces ground pseudo-satellites as intermediary positioning signal sources between space satellites and the positioning terminal. These ground-based transmitters relay positioning signals, enabling indoor coverage where direct satellite signals are blocked, thus resolving the contradiction between outdoor GPS capability and indoor signal availability.
Solution Approach 2:
The patent transitions from three-dimensional space-based satellite positioning to a hybrid system that incorporates two-dimensional ground-based pseudo-satellite positioning. This dimensional expansion allows positioning signals to reach indoor terminals through ground-level transmission, maintaining positioning accuracy across both indoor and outdoor environments.
2Measurement precision
If ground pseudo satellite system is adopted, then indoor positioning accuracy is improved, but device complexity increases due to coexistence of ground and space satellite signals
Solution Approach 1:
The patent creates virtual copies of satellite positioning signals through ground-based pseudo-satellites. These ground transmitters replicate the positioning signal structure and format, allowing terminals to process them using existing satellite positioning algorithms, thereby reducing the complexity of handling multiple signal sources while maintaining high indoor positioning accuracy.
3Measurement precision
If wireless local area network system is used, then indoor positioning can be achieved, but network construction costs increase due to high density requirements
Solution Approach 1:
The patent makes existing communication base stations multi-functional by enabling them to transmit positioning signals in addition to communication functions. This universal utilization of infrastructure eliminates the need for separate dedicated positioning networks, achieving high positioning accuracy while avoiding the high construction costs associated with dense wireless local area network deployments.
4Measurement precision
If communication networks are increased in density to improve positioning accuracy, then positioning precision is improved, but network construction costs and interference increase
Solution Approach 1:
The patent segments the positioning signal transmission function from communication functions and assigns it to ground pseudo-satellites and base stations operating in dedicated positioning frequency bands. This segmentation allows positioning signals to be transmitted without interfering with communication signals, achieving high positioning accuracy while minimizing network interference and avoiding the need for increased network density.
Data Source
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AI summary
Provided are a method, a system and a positioning location calculation device for realizing wireless positioning. The method includes: a positioning measurement device updating locally and statically stored PSS information according to movement information of the positioning measurement device when network connection is performed (200); receiving a positioning signal transmitted by each PSS in a band of a communication network on a determined wireless resource to obtain time information of the positioning signals transmitted by one or more PSSs (201); and calculating location information based on the time information about the positioning signals transmitted by the one or more PSSs and the PSS information according to a preset positioning mode (202). The positioning of the positioning measurement device on a UE side based on the time information of the positioning signals transmitted by each PSS and the PSS information is realized by means of added positioning modes, by using positioning network elements to perform the positioning of the positioning measurement device, the positioning accuracy and applicability of communication network-based positioning are improved, and the dependence of positioning on the communication network is reduced.