Measurement Gaps for PRS Positioning Outside UE Bandwidth Part
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Solution Overview
Problem
User Equipment (UE) in wireless communication networks may struggle with positioning accuracy due to being assigned a Bandwidth Part (BWP) that is less than the available bandwidth for positioning signals, leading to decreased resolution and increased time for achieving desired positioning, necessitating a solution to facilitate more comprehensive spectrum utilization.
Innovation Solution
Configuring a measurement gap for UE to perform intra-frequency positioning measurements outside the assigned BWP, allowing the UE to monitor frequencies outside its current BWP for positioning signals, such as PRS, by determining the need for a gap based on factors like BWP bandwidth, numerology mismatch, and desired positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE is assigned a Bandwidth Part (BWP) less than the available bandwidth for positioning signals, then the UE can operate within a manageable bandwidth configuration, but positioning resolution decreases and measurement time increases
Solution Approach 1:
The patent implements dynamic bandwidth part switching, where the UE can switch between different BWP configurations based on positioning requirements. The network can configure multiple BWPs with different bandwidths, and the UE transitions between them to balance between power consumption and positioning accuracy needs.
Solution Approach 2:
The available bandwidth is segmented into multiple bandwidth parts (BWPs), allowing the UE to select appropriate segments for positioning measurements. This segmentation enables the system to provide both narrowband operation for power saving and wideband operation for high-resolution positioning when needed.
2Measurement precision
If the UE uses less than the available wideband spectrum for positioning measurements, then the UE can conserve power and reduce processing complexity, but positioning resolution decreases
Solution Approach 1:
The system dynamically adjusts the bandwidth configuration based on positioning accuracy requirements. When high precision is needed, the UE activates wider bandwidth parts; when power saving is prioritized, narrower BWPs are used. This dynamic adaptation balances positioning resolution with processing complexity.
Solution Approach 2:
Different bandwidth configurations are applied locally to different operational scenarios. The network can configure specific BWPs optimized for positioning measurements with appropriate bandwidth and numerology, while other resources maintain their own optimizations for data transmission or power efficiency.
3Measurement precision
If the UE is configured to measure positioning signals outside the assigned BWP, then positioning resolution improves through full spectrum utilization, but the UE requires additional measurement gaps and configuration complexity
Solution Approach 1:
The bandwidth part configuration mechanism serves multiple functions: it manages power consumption, controls processing complexity, enables high-resolution positioning when needed, and provides a unified framework for both narrowband and wideband operations. This multi-functionality reduces the need for separate mechanisms for each objective.
Data Source
AI summary
An entity, such as the base station, user equipment (UE) or location server may determine that the UE should be configured with a measurement gap for intra-frequency positioning measurements outside the downlink (DL) bandwidth part (BWP) of the UE. The determination may be based several factors including whether the DL BWP is less than the available bandwidth for the positioning signals transmitted by the base station, with the same or differing numerologies, if a number of resource blocks for the DL BWP is less than a minimum number of resource blocks required by the UE, or if the DL BWP is less than a minimum fraction of a total available bandwidth of the DL PRS signals, or based on a desired positioning accuracy of the UE.