Carrier Phase Positioning Timestamp Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Legacy carrier phase positioning (CPP) techniques suffer from inaccuracies due to misalignment between timing and carrier phase measurements, leading to stale timing information and ambiguous phase measurements, which can result in reduced accuracy or failure of the CPP process.
Innovation Solution
The method involves configuring new signaling techniques to align the reporting of timing and carrier phase measurements by constraining the time separation between their timestamps within a predefined threshold, ensuring that the timing measurements used are valid and recent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If timing measurements and CP measurements are reported with different granularity or different number of samples, then reporting flexibility is improved, but time separation between measurements increases causing stale timing information
Solution Approach 1:
The patent merges the reporting of timing measurements and CP measurements into a unified reporting framework where both measurements are reported together with associated timestamps. This ensures that timing measurements and CP measurements are synchronized and have minimal time separation, resolving the issue of stale timing information while maintaining reporting flexibility through configurable reporting instances.
2Reliability
If timing measurements and CP measurements are taken at different times, then measurement independence is improved, but measurement alignment deteriorates causing ambiguous phase measurements
Solution Approach 1:
The patent implements feedback mechanisms where the network node receives both timing measurements and CP measurements with their associated timestamps, and uses this information to determine whether the measurements are sufficiently aligned. The system provides feedback to the UE about measurement alignment status and requests re-measurement if the time separation exceeds a threshold, thereby maintaining measurement independence while ensuring phase measurement accuracy.
3Measurement precision
If the time separation threshold is reduced, then measurement alignment is improved, but the complexity of managing measurement synchronization increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring the UE with a time separation threshold before measurements are taken. The UE uses this pre-configured threshold to determine whether to report measurements together or separately, eliminating the need for complex real-time synchronization management during operation. This reduces device complexity while maintaining measurement alignment through the pre-established threshold criterion.
Data Source
AI summary
A method, apparatus and computer program product are provided for aligning the reporting of timing measurements and corresponding carrier phase (CP) measurements to avoid CP measurement error due to stale timing measurement information. In the context of a method, the method includes receiving, at a user equipment (UE), a request to maintain time separation between respective timestamps of carrier phase (CP) measurements and timing measurements within a predefined timing separation threshold. The method further includes generating, at the UE, at least one DL CP measurement associated with at least one timestamp, and at least one DL timing measurement associated with at least one DL timing measurement timestamp based on the predefined timing separation threshold, wherein a timing separation between the at least one timestamp and the at least one DL timing measurement timestamp is within the predefined timing separation threshold.