NTN Transmission Timing Alignment Using Koffset Indication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In non-terrestrial network (NTN) systems, the large propagation delay between a terminal device and a satellite poses challenges in determining accurate transmission timing, which is not adequately addressed by conventional communication systems.
Innovation Solution
A method where a terminal device transmits first indication information to a network device to determine a transmission timing, utilizing an offset parameter value Koffset to align communication timing accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional communication systems are used in NTN, then device complexity is reduced, but timing alignment precision deteriorates due to large propagation delay
Solution Approach 1:
The network device pre-calculates and provides offset parameter values (Koffset) to terminal devices before actual communication occurs. These offset values are derived from satellite ephemeris data and orbital parameters, allowing terminal devices to proactively adjust their transmission timing without real-time feedback loops, thereby achieving precise timing alignment while maintaining system simplicity
Solution Approach 2:
The patent introduces offset parameter values (Koffset) as adjustable timing parameters that compensate for propagation delay variations. By dynamically changing these offset parameters based on satellite position and orbital characteristics, the system achieves precise timing alignment across different NTN scenarios without increasing overall system complexity
2Reliability
If timing alignment is enhanced for NTN, then communication reliability improves, but device complexity increases
Solution Approach 1:
The network device acts as an intermediary that centralizes the complex timing calculation functions. It receives satellite ephemeris data, calculates appropriate offset parameters, and distributes them to terminal devices. This mediator approach ensures reliable timing alignment while keeping terminal device complexity low, as the heavy computational burden resides in the network device
3Measurement precision
If propagation delay is compensated, then timing accuracy improves, but information transmission overhead increases
Solution Approach 1:
The patent extracts only the essential offset parameter values (Koffset) from the complete satellite ephemeris data and transmits them to terminal devices. Rather than transmitting full orbital parameter sets, the network device processes the ephemeris data server-side and extracts only the timing-relevant offset values, significantly reducing information overhead while maintaining timing accuracy
Data Source
AI summary
Embodiments of the disclosure provide a method for wireless communication, a terminal device, and a network device. The method includes the following. A terminal device obtains first indication information. The terminal device transmits the first indication information to a network device, where the first indication information is used to determine a first transmission timing.