NTN Timing Offset Parameter Adjustment for Propagation Delay
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Solution Overview
Problem
In Non Terrestrial Network (NTN) systems, the high propagation delay due to long communication distances, such as with satellites, renders the timing relationship used in terrestrial New Radio (NR) systems inaccurate, necessitating a new method to establish an accurate timing relationship for information transmission between network devices and terminal devices.
Innovation Solution
The proposed solution involves a method where a terminal device receives first indication information from a network device, which is used to determine a first offset parameter value. This offset parameter value is then used by the terminal device to determine the timing relationship of transmission, ensuring accurate communication timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the terrestrial NR system timing relationship is used, then the communication timing is simple and easy to implement, but the timing accuracy deteriorates due to high propagation delay in NTN systems
Solution Approach 1:
The patent introduces a first offset parameter and a second offset parameter to adjust the timing relationship. The first offset parameter is configured by the network side based on terminal capability, while the second offset parameter is determined by the terminal based on propagation delay measurement. These parameter changes enable the system to adapt to high propagation delay conditions in NTN while maintaining implementation simplicity.
2Device complexity
If a fixed timing relationship is used for all scenarios, then the system complexity is low, but the adaptability to different propagation delays deteriorates
Solution Approach 1:
The patent makes the timing relationship dynamic by introducing configurable offset parameters. The first offset parameter can be configured differently for different terminals based on their capabilities, and the second offset parameter can be adjusted based on measured propagation delays. This dynamic adjustment enables the system to adapt to various propagation delay conditions without requiring a completely complex redesign.
Solution Approach 2:
The patent uses parameter changes to achieve adaptability. By modifying the timing relationship parameters (first and second offset parameters) based on terminal capability and propagation delay measurements, the system can adapt to different scenarios while maintaining relatively simple implementation.
3Ease of operation
If the terminal transmits according to predetermined timing, then the transmission process is simple, but the communication reliability deteriorates due to inaccurate timing in high propagation delay scenarios
Solution Approach 1:
The patent implements feedback mechanisms where the terminal measures propagation delay and feeds back this information to adjust the timing relationship. The terminal determines the second offset parameter based on measured propagation delay, and this feedback information is used to improve timing accuracy, thereby enhancing communication reliability while keeping the transmission process relatively simple.
Solution Approach 2:
The patent adjusts timing parameters based on feedback from propagation delay measurements. By changing the offset parameters according to actual propagation conditions, the system improves timing accuracy and communication reliability without fundamentally changing the simplicity of the transmission process.
Data Source
AI summary
The present disclosure relates to an information transmission method, a terminal device and a network device. The method includes: receiving, by the terminal device, first indication information; and determining, by the terminal device, a first offset parameter value based on the received first indication information. The first offset parameter value is used to determine a timing relationship of transmission. With the embodiments of the present disclosure, communication between the network device and the terminal device can be achieved with accurate timing relationship.