PRS Resource Configuration in BWP for Accurate RSTD Measurement
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Solution Overview
Problem
Current positioning technologies face challenges in accurately detecting positioning reference signals (PRS) due to low probability of detection, especially when bandwidth parts (BWP) are not supported, leading to difficulties in measuring reference signal time difference (RSTD) and received power (RSRP) between cells or transmission points.
Innovation Solution
A method for configuring PRS resources within a BWP by determining the resource position based on the start physical resource block (PRB) position and the number of PRBs, and performing measurements on this position, along with sending signaling to assist network devices in configuring measurement gaps for PRS measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current positioning technology is used without BWP support, then the system maintains compatibility with legacy networks, but the probability of detecting PRS by terminal becomes relatively low
Solution Approach 1:
The patent introduces dynamic BWP configuration for PRS resources, allowing the system to adapt between legacy and advanced modes. The network can dynamically configure whether PRS resources are associated with specific BWPs or use common resource blocks, enabling flexible adaptation to different terminal capabilities and network conditions, thereby improving PRS detection probability without sacrificing legacy compatibility.
Solution Approach 2:
The patent changes the parameter structure of PRS resource configuration by introducing BWP-related parameters (startingRB, nrofRBs, frequencyDomainOffset) that define resource positions within BWPs. This parameter transformation allows precise positioning of PRS resources in frequency domain, improving detection probability while maintaining backward compatibility through optional configuration modes.
2Measurement precision
If PRS resources are configured without considering BWP structure, then configuration simplicity is maintained, but measurement precision of RSTD and RSRP deteriorates
Solution Approach 1:
The patent segments the frequency domain into multiple BWPs, each capable of containing PRS resources. This segmentation allows precise localization of PRS within specific frequency ranges, improving measurement precision by reducing interference and enabling focused measurement. The configuration complexity is managed through structured parameter definitions that clearly specify resource positions within each BWP.
Solution Approach 2:
The patent introduces BWP as an intermediary layer between the network configuration and terminal measurement. The BWP structure acts as a mediator that organizes PRS resources in a hierarchical manner, enabling precise measurement through well-defined resource positions while simplifying the overall configuration process through standardized parameter sets.
3Measurement precision
If measurement gap configuration is not optimized for PRS, then signaling overhead is reduced, but the ability to perform accurate PRS measurement deteriorates
Solution Approach 1:
The patent implements preliminary configuration of measurement gaps associated with specific PRS resources. By pre-configuring when and where measurements should occur based on PRS resource positions and BWP settings, the system ensures accurate PRS measurement without requiring excessive runtime signaling. The measurement gap configuration is prepared in advance based on the PRS resource configuration, reducing the need for dynamic signaling adjustments.
Data Source
AI summary
A method for configuring a positioning reference signal resource, a method for configuring a measurement gap, and a related device are provided. The method includes: determining a resource position of a PRS within a BWP based on a start PRB position of a PRS resource and the number of PRBs; and performing measurement on the resource position.