PRS Priority Configuration for Downlink Channel Collision Handling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in 5G NR, there is a need to improve the configuration for handling collisions between positioning reference signals (PRS) and other downlink channels to reduce latency and ensure efficient resource utilization, as PRS often have lower priority and can collide with other downlink signals, leading to potential delays in positioning measurements.
Innovation Solution
A method is introduced where a user equipment (UE) determines a PRS priority configuration based on a time interval between a scheduled downlink channel indication and a PRS occasion, applying the configuration if the interval is greater than a threshold, allowing for prioritization of PRS processing over downlink channels to minimize collisions and optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PRS is given lower priority to accommodate other downlink channels, then resource utilization for data transmission is improved, but positioning measurement latency increases
Solution Approach 1:
The patent implements dynamic priority adjustment for PRS based on time interval conditions. When the time interval between downlink channel indication and PRS occasion exceeds a threshold, PRS priority is increased to ensure timely processing. This dynamic mechanism allows the system to adapt priority levels according to real-time scheduling conditions, resolving the contradiction between maintaining high resource utilization and ensuring low positioning latency.
Solution Approach 2:
The patent changes the priority parameter of PRS dynamically based on the time interval condition. By monitoring the time interval between downlink channel indications and PRS occasions, the system adjusts the priority parameter to ensure that when collisions are likely (large time interval), PRS receives higher priority treatment, thus reducing positioning measurement latency while maintaining efficient resource utilization under normal conditions.
2Loss of time
If PRS processing is prioritized over downlink channels, then positioning measurement latency is reduced, but resource utilization for data transmission decreases
Solution Approach 1:
The patent applies dynamic priority adjustment where PRS is prioritized only when the time interval between downlink channel indication and PRS occasion exceeds a threshold. This conditional dynamic approach ensures that PRS receives high priority treatment only when necessary to meet positioning latency requirements, while allowing normal downlink channel scheduling to maintain high resource utilization during other time periods.
3Device complexity
If fixed priority configuration is used for PRS, then system complexity is reduced, but adaptability to different scheduling scenarios is worsened
Solution Approach 1:
The patent introduces a conditional dynamic priority mechanism that adjusts PRS priority based on the time interval between downlink channel indications and PRS occasions. This dynamic approach enhances adaptability to different scheduling scenarios without significantly increasing system complexity, as the adjustment is based on a simple time interval threshold condition rather than complex multi-parameter evaluation.
Solution Approach 2:
The patent changes the priority parameter of PRS dynamically based on the time interval condition. By monitoring the time interval between downlink channel indications and PRS occasions, the system adjusts the priority parameter to ensure that when collisions are likely (large time interval), PRS receives higher priority treatment, thus reducing positioning measurement latency while maintaining efficient resource utilization under normal conditions.
Data Source
AI summary
Method and apparatus for collision rules between PRS and other downlink channels. The apparatus determines a PRS priority configuration including a priority for a collision between a PRS occasion and a first downlink channel. The apparatus receives an indication that schedules the first downlink channel. The first downlink channel scheduled to potentially collide with the PRS occasion. The apparatus determines that a time interval between the indication that schedules the first downlink channel and the PRS occasion is greater than a first threshold. The time interval is based on a separation between at least a last symbol of the indication and a first symbol of the PRS occasion. The apparatus applies the PRS priority configuration if the first downlink channel collides with the PRS occasion and the time interval is greater than the first threshold.