Cell Measurement Feedback for LEO Satellite Coverage Correction
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Solution Overview
Problem
In satellite communication, especially with Low-Earth Orbit (LEO) satellites, maintaining accurate cell coverage is challenging due to the high speed and distance of the satellites, leading to potential antenna direction angle deviations that cause significant cell deviations, which are difficult to correct and can result in signal loss.
Innovation Solution
A communication method and apparatus that involves a terminal device or network device configuring and reporting measurement results to adjust antenna direction angles or flight paths based on signal elevation angles, location information, and measurement capabilities to correct cell coverage errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the antenna direction angle of the satellite is continuously changed to ensure fixed cell coverage, then the coverage accuracy is improved, but the system complexity and error probability increase
Solution Approach 1:
The patent implements a feedback mechanism where terminal devices measure cell signals and report measurement results (including signal elevation angles and location information) to network devices. The network device uses this feedback to determine whether antenna direction angles need adjustment, avoiding continuous changes and reducing system complexity while maintaining coverage accuracy.
Solution Approach 2:
The patent enables terminal devices to autonomously measure cell signals and provide measurement results without requiring continuous satellite adjustment. This self-service approach allows the system to maintain accurate coverage through distributed measurement and reporting, reducing the complexity of centralized control.
2Measurement precision
If the antenna direction angle of the satellite is continuously changed to ensure fixed cell coverage, then the coverage accuracy is improved, but the error probability increases
Solution Approach 1:
The patent performs preliminary measurements by terminal devices before satellite adjustment is needed. Terminal devices continuously measure cell signals and report results in advance, allowing the network to determine adjustment needs before errors occur, thereby maintaining coverage accuracy while reducing error probability.
Solution Approach 2:
The feedback mechanism allows the system to detect coverage deviations through terminal measurements and correct them before they result in severe cell deviation. This proactive feedback reduces the error probability associated with continuous satellite adjustment.
3Reliability
If terminal devices perform cell measurement and reporting, then the cell coverage error correction capability is improved, but the communication overhead increases
Solution Approach 1:
The patent implements partial measurement reporting where terminal devices report measurement results selectively based on whether coverage correction is needed. Not all measurement data is transmitted continuously; instead, reports are generated based on specific conditions, reducing communication overhead while maintaining coverage correction capability.
Solution Approach 2:
The patent extracts only the essential measurement information (such as signal elevation angles and location information) needed for coverage correction, rather than transmitting complete measurement datasets. This extraction approach reduces communication overhead while preserving the ability to correct cell coverage errors.
Data Source
AI summary
A communication method and an apparatus. The method includes: a terminal device receives measurement configuration information from a first network device, where the measurement configuration information indicates the terminal device to measure a first cell. The terminal device sends a measurement result to a second network device, where the measurement result is obtained by the terminal device by measuring the first cell based on the measurement configuration information, and the measurement result indicates that the terminal device obtains a signal of the first cell through measurement or does not obtain a signal of the first cell through measurement. Based on the indication, of the measurement result, that the terminal device obtains the signal of the first cell through measurement or does not obtain the signal of the first cell through measurement, whether coverage of the first cell needs to be corrected may be further determined.