Downlink Synchronization Signal Reorganization Across Terminal Bandwidths
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in utilizing frequency domain resources for downlink synchronization due to terminals being limited to synchronization signals within their minimum working bandwidth, leading to suboptimal synchronization performance.
Innovation Solution
A method and apparatus for generating a downlink synchronization signal by determining the working bandwidth and device data, expanding the basic bandwidth sequence, and performing sequence reorganization to match the working bandwidth, allowing full utilization of frequency domain resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the base station broadcasts the synchronization signal within the minimum working bandwidth to ensure compatibility with terminals having the smallest bandwidth, then terminals with various bandwidths can access the network, but the terminal cannot fully utilize the frequency domain resources for synchronization, resulting in wasted opportunities to improve synchronization detection performance
Solution Approach 1:
The synchronization signal is segmented into multiple parts: a first synchronization signal within the minimum working bandwidth for basic compatibility, and a second synchronization signal extending beyond the minimum bandwidth for enhanced performance. Terminals can selectively receive based on their capabilities.
Solution Approach 2:
The patent extends the synchronization signal from the frequency dimension by broadcasting additional synchronization signals beyond the minimum working bandwidth. This creates multiple frequency domain layers, allowing terminals to choose between basic and enhanced synchronization based on their bandwidth capabilities.
2Measurement precision
If the base station uses a larger frequency domain range for the synchronization signal to improve synchronization detection performance, then terminals can fully utilize frequency domain resources, but terminals with limited working bandwidth cannot receive the entire synchronization signal
Solution Approach 1:
The synchronization signal is divided into a first part within the minimum working bandwidth and a second part extending beyond it. This segmentation allows terminals with limited bandwidth to receive the first part for basic synchronization, while terminals with larger bandwidth can receive both parts for enhanced performance.
Solution Approach 2:
Different portions of the synchronization signal have different quality characteristics. The first synchronization signal provides basic synchronization quality for all terminals, while the second synchronization signal provides enhanced quality for capable terminals. Each terminal receives the appropriate quality level for its capabilities.
Data Source
AI summary
A method for sending a downlink synchronization signal includes: obtaining a working bandwidth and device data of a signal receiving end; determining a number of extensions of a basic bandwidth of the downlink synchronization signal based on the basic bandwidth of the downlink synchronization signal and the working bandwidth; generating a basic sequence corresponding to the basic bandwidth of the downlink synchronization signal according to the device data and a preset sub-carrier spacing; performing sequence reorganization on the basic sequence according to the number of extensions and a sequence structure of the basic sequence to obtain a target reorganization sequence matching the working bandwidth; and generating the downlink synchronization signal and sending the downlink synchronization signal to the signal receiving end according to the target reorganization sequence.