Adaptive Positioning Measurement for PRS Collision Mitigation
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Solution Overview
Problem
The collision between positioning reference signals (PRS) and signals from serving network devices in New Radio (NR) systems leads to positioning accuracy degradation due to interference.
Innovation Solution
A device determines the quality of received signals and PRS, and based on this determination, selects and performs appropriate positioning measurement operations to mitigate interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If positioning measurement is performed using PRS from non-serving network devices, then positioning capability is provided, but positioning accuracy degrades due to signal collision and interference
Solution Approach 1:
The patent implements adaptive positioning measurement by dynamically selecting between different measurement operations based on real-time collision detection. The system transitions from static measurement to dynamic adaptation, choosing between first positioning measurement operation (when no collision) and second positioning measurement operation (when collision detected), thereby maintaining positioning accuracy while preserving versatility
Solution Approach 2:
The patent employs feedback mechanisms where the terminal device detects collisions between PRS and serving network device signals, and based on this feedback, selects appropriate measurement operations. The system uses quality information of received signals to feedback-adjust the measurement process, resolving the contradiction between providing positioning capability and maintaining accuracy
2Productivity
If PRS and serving network device signals are transmitted on overlapping resources, then resource utilization is improved, but signal collision occurs causing positioning accuracy degradation
Solution Approach 1:
The patent applies partial action by performing positioning measurement only on specific resource elements that do not overlap with serving network device signals. When collision is detected, the system selectively measures only the non-overlapping portions of PRS, thereby maintaining some positioning capability while avoiding the harmful effects of collision on measurement precision
3Measurement precision
If adaptive positioning measurement is implemented to handle collisions, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring multiple positioning measurement operations with different characteristics. The system prepares both the first positioning measurement operation (for non-collision scenarios) and second positioning measurement operation (for collision scenarios) in advance, so that when collision detection occurs, the system can immediately switch between pre-defined operations without adding significant real-time processing complexity
Data Source
AI summary
A first device (110) receives a signal from a second device (120) on a first resource and PRS from at least one third device (131-1,131-2) on a second resource. The first resource overlaps the second resource in time domain and partially overlaps the second resource in frequency domain. Further, the first device (110) determines at least one of the following: quality of the received signal, quality of the received PRS, or configuration information about positioning measurement for the first device. The first device (110) also selects, based on the determination, one of positioning measurement operations for the first device (110). In turn, the first device (110) performs the selected positioning measurement operation.