Priority Indicators for PRS Collision Handling
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Solution Overview
Problem
Current wireless communication systems, particularly in NR networks, face challenges in positioning accuracy due to interference and collision issues between positioning reference signals (PRS) and other downlink channels, necessitating measurement gaps that increase latency and complexity.
Innovation Solution
The proposed solution configures priority indicators for wireless devices to manage collisions between PRS and other downlink channels, allowing for gap-less PRS measurements by prioritizing PRS over certain types of data transmissions, such as dynamically scheduled PDSCH, enabling efficient positioning without measurement gaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement gaps are configured for PRS measurements, then positioning measurement accuracy can be ensured, but measurement latency increases and positioning efficiency deteriorates
Solution Approach 1:
The patent extracts the PRS measurement function from the constrained measurement gap context and enables it to operate independently in normal downlink reception periods. By configuring priority indicators that allow PRS measurements during non-gap periods, the system separates positioning measurements from the measurement gap framework, achieving gap-less measurements that reduce latency while maintaining accuracy through priority-based collision handling.
Solution Approach 2:
The patent introduces dynamic priority indicators that can be configured differently for various downlink channels and signals. This dynamic prioritization mechanism allows the system to adaptively manage resource conflicts between PRS and other downlink transmissions, enabling PRS measurements to take precedence when needed without requiring fixed measurement gaps, thereby reducing measurement latency while preserving positioning accuracy.
2Reliability
If measurement gaps are requested for PRS measurements, then collision with downlink channels is avoided, but system complexity and signaling overhead increase
Solution Approach 1:
The patent implements a self-service mechanism where the UE autonomously determines whether to perform PRS measurements during normal downlink reception by evaluating configured priority indicators. Instead of requiring network-configured measurement gaps and associated signaling, the UE independently resolves potential collisions based on pre-configured priorities, eliminating the need for measurement gap request/grant procedures and reducing both signaling overhead and system complexity.
Solution Approach 2:
The patent changes the operational parameters of PRS measurements by introducing priority indicator configurations that allow measurements during normal downlink periods. This parameter change transforms the measurement process from one requiring dedicated measurement gaps to one that integrates with normal downlink reception, using priority-based rules to handle potential collisions, thereby simplifying the overall system while maintaining reliable collision avoidance.
3Productivity
If PRS priority is configured higher than downlink data channels, then gap-less PRS measurements are enabled, but downlink data transmission may be affected
Solution Approach 1:
The patent applies local quality by configuring priority indicators specifically for PRS measurements rather than universally prioritizing PRS over all downlink transmissions. The priority configuration is localized to specific PRS resources and can be differentiated based on the type of downlink channel or signal, allowing PRS measurements to proceed without measurement gaps while minimizing impact on downlink data transmission by applying priority rules only where necessary.
Data Source
AI summary
Systems and methods for generating and configuring priority indication parameters associated with positioning measurements and calculations are provided herein. A priority indicator can be signaled to a wireless device and used for determining a priority associated with a positioning reference signal and an overlapping downlink channel transmission. The wireless device selects which overlapping transmission to measure/receive/process and which to drop.