PRS Configuration Broadcast for On-Demand UE Positioning
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in positioning reference signal (PRS) resource allocation, leading to unnecessary bandwidth and energy consumption due to static and 'always-on' configurations, which do not adapt to varying positioning requirements.
Innovation Solution
Implementing an on-demand PRS technique that dynamically adjusts PRS resource allocation based on specific use cases, utilizing a bifurcated PRS configuration scheme with a small data payload for selection and detailed configuration information, allowing UEs to request and decode only necessary PRS configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If 'always-on' positioning reference signal configurations are used, then positioning availability is improved, but resource consumption and overhead increase
Solution Approach 1:
The patent implements dynamic positioning reference signal configurations where parameters such as occasion periodicity, duration, and spatial direction are adjusted based on real-time positioning requirements. The system transitions from static 'always-on' configurations to dynamic configurations that activate only when positioning is needed, thereby maintaining positioning availability while reducing resource consumption during non-positioning periods.
Solution Approach 2:
The patent changes key parameters of positioning reference signals including occasion periodicity (e.g., 160ms, 320ms, 640ms, 1280ms), duration (1, 2, 4, or 6 ms), and spatial direction to optimize resource usage. By modifying these parameters dynamically based on positioning requirements, the system achieves both high positioning availability and efficient resource utilization.
2Device complexity
If static resource allocations are used, then device complexity is reduced, but adaptability to varying positioning requirements deteriorates
Solution Approach 1:
The patent introduces dynamic resource allocation mechanisms that adapt positioning reference signal configurations to varying positioning requirements. The system automatically adjusts parameters such as bandwidth (5, 10, 20, 40, 50, 80, or 100 MHz), subcarrier spacing (15, 30, 60, or 120 kHz), and spatial directions based on real-time needs, achieving high adaptability without significantly increasing device complexity through automated decision-making algorithms.
Solution Approach 2:
The patent segments positioning reference signal resources into multiple configurable parameters including occasion periodicity, duration, bandwidth, subcarrier spacing, and spatial directions. Each parameter can be independently optimized based on positioning requirements, allowing the system to achieve high adaptability through modular configuration while keeping individual parameter management relatively simple.
3Measurement precision
If comprehensive positioning reference signal configurations are broadcast, then positioning accuracy is improved, but data payload size and decoding time increase
Solution Approach 1:
The patent segments comprehensive positioning reference signal configurations into multiple parameters (occasion periodicity, duration, bandwidth, subcarrier spacing, spatial directions) that can be selectively transmitted and decoded. The network can broadcast only the necessary subset of parameters required for accurate positioning, reducing data payload size and decoding time while maintaining positioning accuracy through selective parameter transmission.
Solution Approach 2:
The patent extracts and transmits only the essential positioning reference signal parameters needed for accurate positioning measurements. By removing unnecessary or redundant configuration parameters from the broadcast data, the system reduces data payload size and decoding time while preserving the core information required for high positioning accuracy.
Data Source
AI summary
Techniques are discussed herein for providing multiple positioning reference signal (PRS) configurations to a user equipment (UE). An example method for measuring a positioning reference signal includes receiving positioning assistance data including a first portion of a plurality of positioning reference signal configurations and scheduling information for a second portion of the plurality of positioning reference signal configurations, selecting a first positioning reference signal configuration based on the first portion of the plurality of positioning reference signal configurations, obtaining a plurality of positioning reference signal parameters associated with the first positioning reference signal configuration based on the scheduling information, wherein the plurality of positioning reference signal parameters are included in the second portion of the plurality of positioning reference signal configurations, and measuring one or more positioning reference signals, the one or more positioning reference signals being based at least in part on the plurality of positioning reference signal parameters.