Terminal Offset Adjustment for NTN Neighbor Cell Measurement
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Solution Overview
Problem
In non-terrestrial communication systems, satellite movement causes a mismatch between the offset configured by the network side and the offset needed for accurate neighboring cell measurement, leading to measurement inaccuracy due to propagation delay differences.
Innovation Solution
A terminal device adjusts the first offset based on the first offset and the propagation delay difference between the serving cell and neighboring cell to obtain a second offset, compensating for satellite movement and improving measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the network side delivers offset configuration for neighboring cell measurement, then the terminal can perform measurement, but satellite movement causes propagation delay mismatch leading to measurement inaccuracy
Solution Approach 1:
The patent applies preliminary action by having the terminal device calculate and apply the propagation delay difference in advance before performing neighboring cell measurement. The terminal computes the propagation delay difference between serving and neighboring cells based on stored delay difference information, and adjusts the offset accordingly before measurement occurs, ensuring accurate measurement despite satellite movement.
Solution Approach 2:
The patent implements feedback by having the terminal device continuously monitor and update propagation delay difference information. The terminal uses feedback mechanisms to obtain updated delay difference information from the network side and adjusts the offset dynamically, ensuring the measurement remains accurate as satellite positions change over time.
2Productivity
If the terminal performs measurement after a period of time following offset delivery, then measurement can be conducted, but satellite has moved to a large extent causing offset mismatch
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing propagation delay difference information that accounts for satellite movement. The terminal uses this pre-computed delay difference information to adjust the offset before measurement, allowing the terminal to perform measurement at flexible times while maintaining accuracy despite satellite displacement during the measurement period.
Solution Approach 2:
The patent implements dynamics by making the offset adjustment adaptive to changing satellite positions. The terminal dynamically updates the offset based on current propagation delay difference information, allowing the measurement system to adapt to satellite movement rather than relying on static offset values, thus maintaining measurement precision regardless of when measurement occurs.
Data Source
AI summary
This application discloses a communication method and apparatus, and a storage medium. In this application, after receiving a first offset at a first moment, a terminal adjusts the first offset at the first moment based on the first offset at the first moment and a first propagation delay difference that corresponds to the first moment and that is between a feeder link of a serving cell and that of a neighboring cell, to obtain a second offset at a second moment. Therefore, an accurate offset may be obtained and accuracy of neighboring cell measurement is improved.