UE Reference Signal Reporting for Positioning Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems, particularly in 5G networks, face challenges in accurately transmitting reference signals for positioning due to issues such as inability to transmit, reduced power, or different spatial relations compared to configured settings.
Innovation Solution
A method and system where user equipment (UE) receives reference signal resource configurations for positioning, attempts to transmit reference signals, and sends a transmission report to a network entity indicating any deviations from the configured settings, including inability to transmit, power reductions, or changes in spatial relations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE transmits reference signals according to configured settings, then positioning accuracy is improved, but transmission reliability deteriorates when the UE cannot transmit or transmits with reduced power
Solution Approach 1:
The patent implements a feedback mechanism where the UE sends a reference signal transmission report to the network entity, indicating whether the reference signal was transmitted successfully, with reduced power, or not transmitted at all. This feedback allows the network to identify transmission failures and adjust positioning calculations accordingly, resolving the contradiction between maintaining positioning accuracy and accounting for transmission reliability issues.
Solution Approach 2:
The patent introduces a parameter change approach by modifying the transmission report to include information about power reduction and transmission status. The network entity uses these parameter changes (transmission status, power level) to adjust the positioning measurement calculations, thereby maintaining positioning accuracy despite reduced transmission reliability.
2Measurement precision
If the UE provides detailed transmission reports, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the transmission report into distinct components: a first indication of whether the reference signal was transmitted, a second indication of power reduction status, and an optional third indication of transmission failure. This segmentation allows the UE to provide detailed information only when necessary, reducing the complexity of routine operations while maintaining positioning accuracy when transmission issues occur.
Solution Approach 2:
The patent applies partial action by implementing selective reporting - the UE provides detailed transmission information only when transmission deviations occur (failure, power reduction), rather than continuously reporting all transmission parameters. This approach maintains positioning accuracy when needed while minimizing the complexity burden on the UE during normal operation.
3Measurement precision
If the network entity adjusts configurations based on transmission reports, then positioning accuracy is improved, but loss of time increases due to configuration adjustments
Solution Approach 1:
The patent implements preliminary action by having the network entity pre-configure multiple reference signal resources with different parameters before actual transmission. When transmission failures occur, the network can quickly switch to alternative pre-configured resources without time-consuming reconfiguration, thereby maintaining positioning accuracy while minimizing time loss.
Solution Approach 2:
The patent uses parameter changes by enabling the network entity to modify configuration parameters (such as reference signal resources, power levels, or transmission timing) based on the UE's transmission reports. These parameter adjustments allow the network to adapt to transmission failures and maintain positioning accuracy with minimal time delay.
Data Source
AI summary
A user equipment (UE) receives reference signal resource configuration for transmitting reference signals for positioning from, e.g., a location server. The UE transmits or attempts to transmit reference signals for positioning to one or more transmission-reception points, such as a gNB. The UE may, however, may be unable to transmit reference signals in accordance with the reference signal resource configuration. For example, the UE may be unable to transmit the reference signals or may transmit the reference signals with lower power or a different spatial relation than configured. The UE may provide a reference signal transmission report indicating that the reference signals were not transmitted according to the reference signal resource configuration. The reference signal transmission report may indicate how the reference signal transmission differs from the reference signal resource configuration and may indicate the reasons that the reference signal transmission differs from the reference signal resource configuration.