NR PRS Collision Handling for Positioning and Demodulation Balance
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Solution Overview
Problem
The 3GPP New Radio (NR) standard does not support processing solutions for collisions between aperiodic/semi-persistent positioning reference signals (PRS) and other downlink signals/channels, affecting positioning accuracy and demodulation performance.
Innovation Solution
A method for UE to determine the type of DL PRS and prioritize discarding either the PRS or other downlink signals/channels in an OFDM symbol based on indication information, such as priority levels and latency requirements, using signaling like LPP, RRC, MAC-CE, or DCI, to resolve collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If NR does not support aperiodic/semi-persistent PRS, then the system complexity is reduced, but the positioning accuracy and demodulation performance deteriorate due to undefined collision processing
Solution Approach 1:
The patent introduces multiple indication information parameters (first indication information for latency requirements, second indication information for signal priority levels, third indication information for processing priority) that enable dynamic adjustment of collision processing behavior. These parameter changes allow the system to handle aperiodic/semi-persistent PRS collisions flexibly without increasing fundamental system complexity
Solution Approach 2:
The patent enables dynamic collision processing by allowing the UE to adaptively choose between discarding DL PRS or discarding other downlink signals/channels based on real-time indication information. This dynamic approach improves positioning accuracy while maintaining manageable system complexity through rule-based decision making
2Measurement precision
If DL PRS is discarded in collision scenarios, then positioning accuracy is maintained, but data communication demodulation performance deteriorates
Solution Approach 1:
The patent implements dynamic signal prioritization where the UE can switch between discarding DL PRS or discarding other downlink signals/channels based on indication information. This dynamic flexibility allows the system to maintain positioning accuracy when needed while preserving demodulation performance in other scenarios
Solution Approach 2:
The patent uses configurable priority levels and latency requirements as parameters that determine collision processing behavior. By changing these parameters based on service requirements, the system can optimize for either positioning accuracy or demodulation performance as needed
3Adaptability or versatility
If priority levels are configured for multiple downlink signals, then collision processing flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent makes existing indication information fields multi-functional by enabling them to convey multiple types of collision processing information (latency requirements, priority levels, processing priorities) through standardized signaling mechanisms. This reduces the need for additional dedicated signaling while maintaining flexibility
Solution Approach 2:
The patent uses configurable parameters with default values that can be adjusted based on service requirements. This approach provides flexibility when needed while allowing the system to operate with minimal signaling overhead using default configurations in standard scenarios
Data Source
AI summary
A collision processing method, indication method, device, apparatus and medium are disclosed. The collision processing method includes: obtaining, by user equipment, a downlink positioning reference signal (PRS) type and collision determination information, the collision determination information being one of or a combination of following information: content carried by a downlink signal/channel, first indication information, second indication information, and third indication information; wherein the downlink PRS type is aperiodic PRS or semi-persistent PRS, the first indication information is used for indicating a positioning latency requirement, the second indication information is used for indicating priority levels of the downlink signals/channels, and the third indication information is used for indicating priority levels of the first and second indication information; and choosing, according to the downlink PRS type and collision determination information, to discard either a downlink PRS or other downlink signals/channels in an orthogonal frequency division multiplexing symbol where a collision occurs.