NR DL PRS Resource Configuration for Positioning Accuracy
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Solution Overview
Problem
Modern wireless communication systems, particularly in 5G networks, face challenges in optimizing resource management for accurate user coordinate calculation and efficient resource allocation in downlink positioning reference signals (PRS) to maintain quality of service (QoS) and minimize resource consumption.
Innovation Solution
The proposed solution involves advanced resource allocation and configuration techniques for NR DL PRS, including options for comb size, number of symbols, time configuration, and seed generation formulas, as well as scheduling algorithms for flexible and efficient resource utilization, particularly through predefined and pseudo-randomized PRS transmission modes and muting patterns to manage interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If PRS resources are allocated with the same spatial filter inside a PRS occasion, then resource allocation is simplified, but positioning accuracy deteriorates due to lack of spatial diversity
Solution Approach 1:
The patent segments PRS resources into different groups based on spatial filter characteristics. Within a PRS occasion, resources are divided such that some resources use the same spatial filter while other resources use different spatial filters. This segmentation allows the system to maintain measurement accuracy through spatial diversity while simplifying resource allocation through structured grouping.
2Measurement precision
If multiple PRS occasions are used with different spatial filters, then positioning accuracy improves through spatial diversity, but measurement time increases
Solution Approach 1:
The patent implements periodic PRS transmission occasions with alternating spatial filter configurations. By using periodic action, the system achieves spatial diversity for accurate positioning while controlling measurement time through regulated transmission intervals. The periodic structure allows efficient utilization of time resources while maintaining positioning accuracy.
3Reliability
If PRS transmission occurs in dense interference environments, then positioning service availability is maintained, but measurement quality deteriorates due to interference
Solution Approach 1:
The patent converts the harmful interference in dense environments into a beneficial feature by using interference as a distinguishing characteristic. Different PRS resources are configured with different spatial filters that create distinct interference patterns. The UE utilizes these patterned interferences to identify and select optimal PRS resources, thereby maintaining measurement quality even in dense interference environments.
4Measurement precision
If resource allocation optimizes for positioning accuracy, then measurement quality improves, but resource consumption increases
Solution Approach 1:
The patent applies local quality by configuring different spatial filters for different PRS resources based on local interference characteristics and positioning requirements. Rather than uniformly allocating resources, the system optimizes each resource's spatial filter configuration to achieve the required measurement quality only where and when needed, thereby reducing overall resource consumption while maintaining positioning accuracy.
Data Source
AI summary
Methods, systems, and storage media are described for new radio downlink positioning reference signal (NR DL PRS) resource allocation and configuration. In particular, some embodiments relate to some embodiments relate to NR DL PRS resource configurations such as comb size, number of symbols, DL PRS resource time configuration (e.g., initial start time and periodicity), and providing formulas for calculation of seed for DL PRS sequence generation. Other embodiments may be described and/or claimed.