Sync Channel Frequency Positioning for Drifted Wireless Terminals
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Solution Overview
Problem
Terminal devices with large frequency drifts face challenges in detecting synchronization and discovery signals, affecting communication quality due to their inability to accurately tune to the correct frequency points.
Innovation Solution
A wireless communication method where a network device transmits information indicating the frequency domain location of synchronization or discovery channels to the terminal device, enabling frequency offset calibration and improving communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If terminal devices perform signal detection on synchronization channels without frequency calibration, then the detection process can be initiated, but detection accuracy deteriorates due to large frequency drift
Solution Approach 1:
The network device transmits first information indicating the frequency domain location of the synchronization channel before the terminal device performs signal detection. This preliminary provision of frequency location information enables the terminal device to pre-calibrate its frequency offset, ensuring accurate signal detection when frequency drift occurs, thereby resolving the contradiction between detection accuracy and communication quality
2Device complexity
If terminal devices operate without frequency offset calibration, then device complexity is reduced, but measurement precision of synchronization signals deteriorates
Solution Approach 1:
The terminal device autonomously acquires frequency domain location information from the transmitted first information and performs self-calibration of its frequency offset without requiring complex external calibration equipment or procedures. This self-service approach maintains low device complexity while improving synchronization signal detection precision through frequency offset correction
Data Source
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AI summary
The present application provides a wireless communication method, a terminal device, and a network device. The method comprises: a terminal device receives first information, wherein the first information is used for indicating a frequency domain position of a first channel, and the first channel is a synchronization channel or a discovery channel. In embodiments of the present application, a terminal device can acquire information (i.e., first information) used for indicating the frequency of a synchronization channel/a discovery channel. On the basis of the first information, the terminal device can calibrate a frequency offset of the terminal device, thereby improving the communication quality.