NTN Positioning Signal Timing Advance Compensation
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Solution Overview
Problem
Current positioning technologies in non-terrestrial network (NTN) systems face challenges due to large signal transmission delays and satellite movement, making ideal assumptions about timing errors from terrestrial network (TN) systems inapplicable.
Innovation Solution
A wireless communication method for positioning in NTN systems, where a terminal device transmits an uplink positioning signal based on a Timing Advance (TA) value, and network devices determine and report measurement information to enhance positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If ideal assumptions about timing errors from terrestrial network systems are applied to NTN positioning, then positioning methodology can be simplified, but positioning accuracy deteriorates due to large signal transmission delays and satellite movement
Solution Approach 1:
The patent changes the timing error parameters from terrestrial network assumptions to NTN-specific parameters that account for large transmission delays and satellite movement. The network device measures uplink positioning signals and determines timing error parameters specific to NTN conditions, replacing ideal terrestrial assumptions with actual NTN measurements.
2Measurement precision
If TA values are adjusted to compensate for timing errors in NTN, then positioning precision improves, but system complexity increases due to additional measurement and reporting requirements
Solution Approach 1:
The network device performs self-service by measuring the uplink positioning signals itself and determining the timing error parameters. This eliminates the need for complex terminal device measurements and reporting, as the network device autonomously completes the timing error assessment and uses it to adjust TA values for positioning.
3Ease of operation
If uplink positioning signals are transmitted based on TA values in NTN, then positioning can be performed, but timing errors increase due to satellite movement and large transmission delays
Solution Approach 1:
The network device measures the uplink positioning signals and determines timing error parameters, then uses this feedback information to adjust TA values. This closed-loop feedback mechanism compensates for timing errors caused by satellite movement and large transmission delays, maintaining positioning capability while reducing timing errors.
Data Source
AI summary
A wireless communication method for positioning, applicable to a terminal device, is provided. The method includes transmitting an uplink positioning signal on an uplink positioning signal resource based on a timing advance (TA) value. A wireless communication method for positioning, applicable to a network device, is provided. The method includes determining and/or reporting first measurement information based on an uplink positioning signal received on an uplink positioning signal resource.