UE Timing Misalignment Reporting for Non-Terrestrial Uplink Alignment
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Solution Overview
Problem
In non-terrestrial wireless communication networks, timing misalignment between uplink and downlink timelines at user equipment (UE) leads to collisions and inefficient resource utilization due to the satellite's unawareness of the timing misalignment estimated by the UE.
Innovation Solution
UE determines timing misalignment information and transmits it to the satellite, allowing for uncompensated uplink signals to be sent without adjustment based on the timing misalignment, thereby optimizing communication schedules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE compensates for timing misalignment by adjusting uplink signals, then communication reliability improves, but device complexity increases due to additional adjustment mechanisms
Solution Approach 1:
The patent implements a feedback mechanism where the UE reports timing misalignment information to the satellite, and the satellite adjusts downlink timing accordingly. This feedback loop resolves the timing misalignment issue without requiring the UE to continuously adjust uplink signals, thereby improving reliability while avoiding increased device complexity.
Solution Approach 2:
The patent introduces timing misalignment information as an intermediary element that mediates between the UE and satellite. Instead of the UE directly adjusting its uplink signals based on complex timing calculations, the UE simply reports the misalignment state, and the satellite uses this information to adjust downlink timing, simplifying the UE's operation while maintaining communication reliability.
2Device complexity
If the satellite is unaware of timing misalignment, then device complexity is reduced, but collisions occur and resource utilization becomes inefficient
Solution Approach 1:
The UE provides feedback to the satellite about timing misalignment conditions. This feedback enables the satellite to adjust downlink timing to match the UE's uplink timeline, preventing collisions and improving resource utilization without requiring complex adjustments at the UE end.
Solution Approach 2:
The UE determines and reports timing misalignment information in advance, allowing the satellite to prepare appropriate downlink timing adjustments before actual communication occurs. This preliminary action prevents collisions and optimizes resource allocation without increasing UE complexity.
3Productivity
If timing misalignment information is reported to the satellite, then resource utilization improves, but loss of time increases due to additional signaling
Solution Approach 1:
The patent applies partial action by reporting only the essential timing misalignment information rather than complete timing details. This selective reporting approach minimizes the time required for signaling while still providing the satellite with sufficient information to adjust downlink timing and improve resource utilization.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine timing misalignment information for a timing misalignment between an uplink timeline and a downlink timeline associated with a non-terrestrial cell. The UE may transmit the timing misalignment information to a satellite associated with the non-terrestrial cell. Numerous other aspects are described.