Positioning Anchor Filtering for Low-Overhead Sidelink Reselection

The patent extracts and transmits only the essential measurement information for candidate positioning anchors that meet specific criteria (such as GDOP thresholds and signal strength requirements) to the LMF, rather than transmitting all discovered anchor measurements. This selective extraction reduces signaling overhead while maintaining positioning accuracy by filtering out redundant or low-quality measurement data.

The patent applies preliminary filtering of candidate positioning anchors before measurement reporting by evaluating anchors against predefined criteria (GDOP, signal strength, geometric distribution) in advance. This preliminary action identifies and selects only the most relevant anchors for measurement reporting, reducing the volume of data transmitted to the LMF while ensuring positioning quality is maintained.

The patent utilizes parameter changes by dynamically adjusting filtering criteria (such as GDOP thresholds, signal strength thresholds, and geometric distribution parameters) based on the specific positioning scenario and available resources. This allows the system to optimize network resource usage by adapting the complexity of the filtering mechanism to the actual needs of the positioning task, rather than using a fixed complex approach.

The patent implements self-service by enabling user equipment to autonomously perform anchor reselection and measurement filtering based on assistance information provided by the network. The equipment independently evaluates candidate anchors against criteria and determines which measurements to report, reducing the need for continuous network control and optimizing resource usage while keeping the filtering logic distributed and manageable.