Positioning Reference Signal Resource Configuration for Sub-meter Accuracy
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Solution Overview
Problem
Current positioning technologies in industrial Internet of Things (IoT) systems often suffer from low precision, with positioning accuracy typically ranging from 3 meters to 1 meter, which is insufficient for many applications requiring sub-meter accuracy.
Innovation Solution
A method for configuring resources for positioning-purpose reference signals, where the network device sends resource configuration information to the terminal, indicating different positions of frequency domain resources for multiple positioning-purpose reference signals within a single positioning frequency layer, allowing for simultaneous transmission and improved positioning precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single frequency domain resource is used for positioning reference signals, then the system complexity is low, but the positioning precision is insufficient (3 meters accuracy)
Solution Approach 1:
The patent divides the positioning reference signals into multiple groups, where each group uses a different frequency domain resource position within the same positioning frequency layer. This segmentation allows the system to transmit multiple positioning reference signals simultaneously on the same frequency layer but at different frequency positions, thereby improving positioning precision from 3 meters to sub-meter level while maintaining reasonable system complexity through structured resource allocation
Solution Approach 2:
The patent introduces an additional dimension for resource differentiation by utilizing different positions within the frequency domain on the same positioning frequency layer. Instead of only using time or frequency layer differentiation, the invention adds positional differentiation within the frequency domain, allowing multiple positioning reference signals to coexist without interference while enhancing measurement accuracy through multi-position signal synthesis
2Measurement precision
If multiple frequency domain resources are used for positioning reference signals, then positioning precision improves, but the resource configuration complexity increases
Solution Approach 1:
The patent applies local quality by allocating specific frequency domain resource positions within the positioning frequency layer according to the characteristics of different positioning reference signal groups. Each group is assigned a specific local position in the frequency domain, allowing the system to optimize the positioning precision for each group while maintaining overall configuration manageability through localized rather than global resource allocation
3Measurement precision
If multiple positioning reference signals are transmitted simultaneously, then positioning accuracy improves, but the signal interference may increase
Solution Approach 1:
The patent segments the frequency domain resources into distinct positions within the positioning frequency layer, assigning each positioning reference signal group to a specific segment. This segmentation in the frequency domain creates orthogonal or quasi-orthogonal resource allocation, allowing multiple positioning reference signals to be transmitted simultaneously without mutual interference, thereby achieving sub-meter positioning accuracy through multi-signal synthesis
Data Source
AI summary
A method for configuring a resource for a positioning-purpose reference signal and a user equipment includes: receiving resource configuration information of a plurality of positioning-purpose reference signals sent by a network device; wherein the resource configuration information is at least configured to indicate positions of frequency domain resources of the positioning-purpose reference signals transmitted by the terminal; the frequency domain resources of at least two of the positioning-purpose reference signals are at different positions of one positioning frequency layer.