User Equipment Multipath Signal Detection Algorithm Selection
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Solution Overview
Problem
Multipath propagation of positioning signals in wireless communication systems affects the accuracy of location determination in positioning sessions, as existing technologies lack efficient methods to differentiate between line-of-sight and non-line-of-sight signals.
Innovation Solution
User equipment (UE) selects a path delay detection algorithm from a plurality of supported algorithms to identify line-of-sight positioning signals and reject non-line-of-sight signals, improving measurement accuracy by determining path delays and reporting location information to a location server.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If path delay detection algorithms are used to differentiate line-of-sight and non-line-of-sight signals, then location determination accuracy is improved, but device complexity increases
Solution Approach 1:
The UE dynamically selects from multiple path delay detection algorithms based on current operating conditions, signal characteristics, and capability definitions. The system transitions from a static single-algorithm approach to a dynamic multi-algorithm selection framework, allowing adaptation to different propagation environments while managing computational complexity through conditional algorithm choice
Solution Approach 2:
The invention changes the parameter of algorithm selection by defining multiple path delay detection algorithms with different complexity levels and performance characteristics. The UE reports its capability to support specific algorithms to the location server, enabling parameter-based algorithm selection that balances accuracy requirements with device processing capabilities
2Measurement precision
If multiple path delay detection algorithms are supported, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The UE autonomously defines its capability to support specific path delay detection algorithms and reports this capability to the location server without requiring manual configuration or intervention. The system self-manages the algorithm selection process by having the UE independently determine which algorithms it can execute based on its processing capabilities, simplifying the operational interface while maintaining multiple algorithm options
3Measurement precision
If path delay detection is performed to reject non-line-of-sight signals, then location determination accuracy is improved, but processing time increases
Solution Approach 1:
The system dynamically selects path delay detection algorithms based on real-time signal conditions and accuracy requirements. When multipath propagation is detected or suspected, more sophisticated algorithms are activated to improve accuracy. When conditions permit, simpler algorithms or reduced processing is used, creating a dynamic balance between processing time and positioning accuracy that adapts to current operational context
Data Source
AI summary
A user equipment (UE) may define the classes of a plurality of path delay detection algorithms that the UE may use to identify line-of-sight positioning signals and reject non-line-of-sight positioning signals. The UE may receive a capabilities request from a location server and transmit, to the location server, a capability report indicating the classes of the plurality of path delay detection algorithms supported by the UE. The UE receives a location information request from a location server, and selects a path delay detection algorithm, which is used to perform measurements of one or more positioning signals received by the UE. The UE provides an indication of the selected path delay detection algorithm along with the positioning measurements to the location server. The location server determines or verifies a location of the UE based on the path delay detection algorithm selected by the UE and the positioning measurements.