PRS Resource Allocation for Positioning Accuracy
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Solution Overview
Problem
Current wireless communication systems face challenges in achieving high accuracy for positioning due to limitations in the allocation and utilization of positioning reference signal (PRS) resources.
Innovation Solution
The method involves repeatedly allocating PRS resources within a predetermined period, allowing for increased accuracy in positioning by enhancing the availability and reliability of PRS signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PRS resources are allocated once within a period, then resource allocation complexity is reduced, but positioning accuracy deteriorates due to insufficient signal measurements
Solution Approach 1:
The patent divides PRS resources into multiple separate allocations within a period rather than a single allocation. Each PRS resource instance provides independent measurement opportunities, and the combination of multiple instances improves positioning accuracy while maintaining manageable allocation complexity through structured resource organization
Solution Approach 2:
The patent implements periodic PRS resource allocation where PRS resources are allocated at multiple time instances within a period. This periodic repetition allows the UE to perform multiple measurements and average them out, improving positioning accuracy while the periodic structure provides predictable resource patterns that simplify allocation management
2Measurement precision
If PRS resources are allocated repeatedly within a period, then positioning accuracy improves through enhanced signal availability, but resource allocation complexity increases
Solution Approach 1:
The patent creates multiple copies of PRS resource configurations within a period. Each copy represents a repeated allocation that provides additional measurement opportunities for the UE. The copying approach ensures consistent resource patterns across allocations, improving reliability and accuracy while simplifying management through template-based replication
Solution Approach 2:
The patent varies parameters such as time offsets and frequency resources across different PRS allocations within a period. These parameter changes ensure that measurements are taken under diverse conditions, improving positioning accuracy through better signal coverage and interference mitigation, while the systematic parameter variation follows structured patterns that prevent exponential complexity growth
3Reliability
If the number of PRS resources is increased, then positioning reliability improves, but resource overhead and system complexity increase
Solution Approach 1:
The patent designs PRS resources to serve multiple functions simultaneously: positioning measurements, timing synchronization, and channel estimation. By making the same PRS resources multi-functional, the system achieves high positioning reliability without proportionally increasing resource quantity, as the same signals fulfill multiple purposes
Solution Approach 2:
The patent ensures continuous PRS resource availability throughout the period by strategically allocating resources at multiple time instances. This continuity guarantees that the UE can always find available PRS resources for measurement, improving positioning reliability without requiring excessive total resource quantity through efficient temporal distribution
Data Source
AI summary
Disclosed is a method for a terminal for receiving a positioning reference signal (PRS) in a wireless communication system. Particularly, the method includes: receiving first information related to a PRS resource group including a plurality of PRS resources, and second information related to a repetition count for the PRS resource group; and receiving a PRS on the plurality of PRS resources based on the first information and second information, wherein the PRS resource group may be allocated repeatedly as many times as the repetition count within a certain period.