Positioning SRS Scheduling for First Available Reserved Occasion
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Solution Overview
Problem
Existing wireless communication systems face challenges in ensuring timely transmission of Sounding Reference Signals (SRS) for positioning due to collisions with priority messages or other transmission constraints, leading to incomplete or missed positioning measurements.
Innovation Solution
Implementing a scheduling mechanism that allows user equipment (UE) to transmit positioning SRS on the first available reserved occasion, avoiding earlier or subsequent occasions that are not available, and enabling the base station to reassigned unused reserved occasions for other channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple reserved occasions are scheduled for SRS transmission, then positioning reliability is improved, but transmission time flexibility is reduced
Solution Approach 1:
The patent implements dynamic SRS transmission by allowing the UE to select the first available reserved occasion rather than transmitting at a fixed scheduled time. The UE monitors transmission availability and dynamically adjusts its transmission timing based on real-time conditions, such as avoiding collisions with priority messages. This dynamic approach maintains positioning reliability while restoring time flexibility.
Solution Approach 2:
The patent applies preliminary action by pre-scheduling multiple reserved occasions for SRS transmission before the actual transmission event. This allows the UE to have advance knowledge of available transmission slots and plan its transmission accordingly, ensuring positioning reliability is maintained while enabling flexible adaptation to real-time conditions.
2Device complexity
If SRS transmission is scheduled at fixed times, then scheduling simplicity is improved, but collision avoidance capability deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where the UE monitors transmission conditions and provides feedback to the base station about available reserved occasions. This feedback loop enables the system to detect collisions with priority messages and adjust transmission timing accordingly, maintaining scheduling simplicity while effectively avoiding harmful collisions.
Solution Approach 2:
The system transitions from static fixed-time scheduling to dynamic opportunity-based scheduling. The UE dynamically determines the first available reserved occasion based on real-time transmission conditions, allowing the system to maintain simplicity while gaining collision avoidance capability through adaptive timing.
3Productivity
If all reserved occasions must be used, then resource utilization is improved, but positioning accuracy deteriorates
Solution Approach 1:
The patent extracts the essential function of SRS transmission from the constraint of using all reserved occasions. By identifying and utilizing only the first available reserved occasion, the system maintains positioning accuracy while leaving unused occasions available for other purposes, thus resolving the conflict between resource utilization and measurement precision.
Solution Approach 2:
The patent applies local quality by treating each reserved occasion differently based on its availability status. Instead of uniformly using all occasions, the system selectively uses only the first available occasion for positioning, while other occasions can be allocated to different purposes, optimizing both positioning accuracy and overall resource utilization.
Data Source
AI summary
A base station may transmit, to a user equipment (UE), a sounding reference signal (SRS) schedule for transmission of a positioning SRS by the UE. The SRS schedule may include a plurality of reserved occasions associated with the positioning SRS. The base station may receive the positioning SRS on a first available reserved occasion of the plurality of reserved occasions. A set of earlier reserved occasions of the plurality of reserved occasions may not be available for transmission of the positioning SRS. Each reserved occasion the set of earlier reserved occasions may be earlier relative to the first available reserved occasion. The base station may stop SRS processing on any subsequent reserved occasions of the plurality of reserved occasions after reception of the positioning SRS on the first available reserved occasion of the plurality of reserved occasions.