PRS Muting Pattern Switching for Wireless Positioning Collisions
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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 increase accuracy, particularly when PRS transmissions collide with non-PRS transmissions, leading to priority conflicts and inefficiencies.
Innovation Solution
A wireless transmit/receive unit (WTRU) is configured to receive muting patterns for PRS time resources and adjust its operation to prioritize non-PRS transmissions, selecting an earliest unmuted PRS transmission after the collision, based on priority indications from the network, to manage PRS and non-PRS transmissions effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the WTRU prioritizes non-PRS transmissions when collisions occur, then the reliability of control and data channel transmissions is improved, but the positioning accuracy and timeliness deteriorate due to PRS transmission delays
Solution Approach 1:
The WTRU dynamically switches between first and second muting patterns based on real-time collision detection and priority determination. When a collision is detected between PRS and non-PRS transmissions, the WTRU determines priorities and selects the appropriate muting pattern to mute PRS transmissions during collision periods, thereby dynamically adapting to varying transmission priorities and resolving the contradiction between reliability and measurement precision.
Solution Approach 2:
The system changes the muting pattern parameter from a static configuration to a dynamic one that can switch between two distinct patterns. The first muting pattern is used when no collisions occur, while the second muting pattern is activated when collisions are detected. This parameter change allows the system to optimize between positioning accuracy and transmission reliability based on actual collision conditions.
2Productivity
If the WTRU switches muting patterns to avoid PRS collisions, then the efficiency of resource utilization is improved, but the positioning latency increases due to selecting the earliest unmuted PRS transmission
Solution Approach 1:
The WTRU is pre-configured with two muting patterns before operation begins. When a collision is detected, the system can immediately switch to the pre-prepared second muting pattern without requiring complex real-time calculations or pattern generation. This preliminary preparation reduces the time penalty associated with pattern switching while still achieving efficient resource utilization by avoiding PRS-non-PRS transmission collisions.
3Device complexity
If the WTRU uses a single muting pattern for PRS transmissions, then the device complexity is reduced, but the adaptability to handle collision scenarios deteriorates
Solution Approach 1:
The muting pattern management is segmented into two distinct patterns: a first muting pattern for normal operation without collisions, and a second muting pattern for collision scenarios. Each pattern is independently configured and optimized for its specific use case. This segmentation allows the system to maintain relatively simple individual patterns while achieving high adaptability through the ability to switch between them based on collision detection, thus resolving the contradiction between complexity and adaptability.
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.