Autonomous Timing Offset Updates for Low-Overhead NTN Signaling
Solution Overview
Problem
In non-terrestrial networks (NTNs), the high signaling overheads for continuously updating the timing offset parameter by the network device to terminal devices lead to inefficiencies due to the large round trip delays and mobility of network devices.
Innovation Solution
A method where terminal devices automatically update the timing offset parameter based on first information received from the network device, which includes a reference value and indication information specifying the update rule, and a timing offset variation, thereby reducing the need for continuous signaling from the network device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the network device continuously updates the timing offset parameter by using signaling, then the timing offset parameter can be kept accurate, but the signaling overheads become high
Solution Approach 1:
The terminal device autonomously updates the timing offset parameter by calculating it based on its own location information and the network device's location, eliminating the need for continuous network device signaling. The terminal device determines the timing offset parameter itself using the formula: timing offset parameter = 2 × (distance between terminal device and network device) / signal transmission speed
Solution Approach 2:
The network device provides location information of the terminal device and its own location in advance, enabling the terminal device to calculate and determine the timing offset parameter independently without requiring continuous updates from the network device
2Adaptability or versatility
If the network device continuously updates the timing offset parameter, then the parameter reflects current distance accurately, but the signaling overheads increase due to mobility
Solution Approach 1:
The terminal device independently calculates the timing offset parameter based on real-time location information, adapting to network device mobility without requiring continuous signaling from the network device. This reduces signaling complexity while maintaining adaptability to changing distances
Solution Approach 2:
The terminal device uses feedback from location information (both its own and the network device's) to dynamically determine the timing offset parameter, enabling the system to adapt to mobility changes through a simplified feedback mechanism rather than continuous signaling
Data Source
AI summary
A timing offset parameter update method, a device, and a system are provided, which relate to the field of communication technologies, to help reduce signaling overhead generated when a network device updates a value of a timing offset parameter. The method includes: a terminal device obtains first information that includes a first reference value and first indication information, wherein the first indication information indicates an update rule of a timing offset parameter, and the first reference value is an initial value of the timing offset parameter. The terminal device updates a value of the timing offset parameter based on the first information and a timing offset variation, to obtain an updated value of the timing offset parameter, wherein an absolute value of the timing offset variation is equal to an absolute value of a difference between any two consecutively updated values of the timing offset parameter.