Antenna Hopping for UE Positioning Reference Signal Measurements
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Solution Overview
Problem
The determination of a user equipment (UE) position in wireless communication networks faces challenges due to processing limitations, which reduce the number of reference signals that can be measured in a single instance, leading to delayed reporting and timestamp ambiguities, especially in moving scenarios or when lower latency is required.
Innovation Solution
The implementation of antenna hopping, where different subsets of antennas are used for successive measurement instances, allowing for more reference signals to be measured in each instance and reducing latency by cycling through antennas or subsets, thereby improving measurement quality and reporting frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple antennas are used for reference signal measurements, then measurement redundancy and accuracy are improved, but the number of reference signals that can be measured in a single instance decreases due to processing limitations
Solution Approach 1:
The patent segments the measurement process by dividing the multiple antennas into different subsets that are used across different measurement instances. Instead of using all antennas simultaneously in one measurement instance, the measurement task is segmented across multiple instances with different antenna subsets, thereby increasing the number of reference signals measured per instance while maintaining measurement accuracy through redundancy across instances.
2Reliability
If multiple antennas are used for reference signal measurements, then measurement redundancy is improved, but reporting delay increases due to processing limitations
Solution Approach 1:
The patent segments the antenna usage across multiple measurement instances, allowing the UE to complete measurements more quickly in each instance. This reduces the overall time required to gather sufficient measurement data for reporting, thereby reducing reporting delay while maintaining measurement redundancy through the use of multiple antenna subsets across instances.
3Reliability
If multiple antennas are used for reference signal measurements, then measurement redundancy is improved, but timestamp ambiguity increases
Solution Approach 1:
The patent segments measurements into distinct measurement instances, each with its own timestamp. By associating timestamps with individual measurement instances rather than aggregating multiple antenna measurements into a single ambiguous timestamp, the patent eliminates timestamp ambiguity while maintaining measurement redundancy through the segmented approach across multiple instances.
Data Source
AI summary
Antenna hopping techniques for Positioning Reference Signal (PRS) measurements in positioning of a user equipment (UE) include, for each of a plurality of successive measurement instances, taking a set of measurements of a respective set of PRS resources during the respective measurement instance using only one subset of a plurality of subsets of antennas of the UE, such that different subsets of the plurality of subsets of antennas of the UE are used for different measurement instances of the plurality of successive measurement instances. Each subset comprises one or more, but fewer than all, antennas of the UE. Techniques include sending one or more measurement reports from the UE to a location server. Each of the one or more measurement reports may comprise: information indicative of a respective set of measurements, and a timestamp corresponding to the respective measurement instance during which the respective set of measurements were taken.