PRS Muting Pattern Switching for Collision-Aware Positioning
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Solution Overview
Problem
Existing mobile communication systems face challenges in optimizing the transmission and reception of positioning reference signals (PRS) to reduce latency and overhead while maintaining accuracy, particularly when PRS transmissions collide with non-PRS transmissions.
Innovation Solution
A wireless transmit/receive unit (WTRU) is configured to receive muting patterns for PRS time resources and prioritize non-PRS transmissions, selecting an alternative time resource for PRS reception based on muting patterns to avoid collisions and ensure timely PRS reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the WTRU receives PRS transmissions according to the first muting pattern, then positioning accuracy is maintained, but latency increases when PRS collides with non-PRS transmissions
Solution Approach 1:
The WTRU dynamically switches between the first muting pattern (for positioning accuracy) and the second muting pattern (for reduced latency) based on collision detection with non-PRS transmissions. This dynamic adaptation allows the system to optimize between positioning accuracy and latency depending on current transmission conditions
Solution Approach 2:
The system changes the muting pattern parameter from the first muting pattern to the second muting pattern when a collision is detected. This parameter change enables the WTRU to select alternative PRS time resources that avoid collisions, thereby reducing latency while maintaining positioning functionality
2Reliability
If the WTRU prioritizes non-PRS transmissions over PRS transmissions, then network communication reliability is improved, but positioning service accuracy deteriorates
Solution Approach 1:
The system segments PRS time resources into different categories based on muting patterns. When a collision occurs, the WTRU identifies alternative PRS time resources from the second muting pattern, effectively segmenting the resource selection process to maintain positioning accuracy while allowing non-PRS transmissions to proceed
Solution Approach 2:
The WTRU pre-configures multiple muting patterns (first and second) before operation. When a collision is detected, the WTRU can immediately switch to the pre-configured second muting pattern and select alternative time resources, avoiding the need for real-time pattern generation and reducing switching overhead
3Loss of energy
If the WTRU selects alternative PRS time resources based on muting patterns, then overhead is reduced, but device complexity increases
Solution Approach 1:
Multiple muting patterns are pre-configured in the WTRU before operation. This preliminary configuration eliminates the need for real-time pattern generation and selection algorithms, reducing the computational complexity during actual PRS transmission while still enabling overhead reduction through efficient resource selection
Solution Approach 2:
The system uses simple, pre-defined muting patterns rather than complex adaptive algorithms. These patterns are straightforward to implement and process, reducing device complexity while effectively managing PRS resource allocation and minimizing overhead
Data Source
AI summary
Systems, methods, and instrumentalities are described for handling positioning reference signals in a wireless communication system. The positioning reference signals may be assigned priorities that may be used to facilitate various operations of a wireless transmit/receive unit (WTRU) such as positioning related services, collision avoidance, measurement and reporting, etc. The WTRU may be configured with multiple muting patterns associated with the positioning reference signals and may switch between different muting patterns based on the priorities of the positioning reference signals and/or other downlink (DL) or uplink (UL) transmissions that may overlap or collide with the positioning reference signals.