Synchronization Signal Positioning Using Auxiliary Frequency Information
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Solution Overview
Problem
In wireless communication systems like LTE and NR, determining the frequency domain position for transmitting or receiving synchronization signals is inefficient due to the flexible configuration of carriers and large bandwidths, leading to increased time and power consumption during synchronization.
Innovation Solution
A signal transmission method that utilizes auxiliary information to quickly determine the frequency domain position for synchronization signals, including obtaining and transmitting or receiving synchronization signals based on this information, which is applicable to sidelink, mMTC, NB-IoT, and IAB services, or unlicensed frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If synchronization signals are searched evenly spaced apart by 100 kHz one by one in NR with large bandwidth, then the terminal can find the synchronization signal position, but time and power consumption for synchronization will be greatly increased
Solution Approach 1:
The patent applies preliminary action by pre-configuring frequency domain positions of synchronization signals through SIB messages or manufacturer pre-configuration before the terminal performs synchronization. This allows the terminal to directly access predetermined positions rather than searching sequentially, significantly reducing synchronization time while maintaining accurate position determination.
Solution Approach 2:
The patent changes the search parameter from fixed 100 kHz spacing to flexible frequency domain positions that can be configured based on carrier characteristics. The base station can indicate specific resource blocks for synchronization signals, adapting the search strategy to the actual deployment scenario and reducing unnecessary searches.
2Adaptability or versatility
If the base station transmits synchronization signal block on flexible synchronization raster positions, then carrier configuration flexibility is improved, but the terminal's ability to quickly determine synchronization signal position deteriorates
Solution Approach 1:
The patent introduces an intermediary mechanism where the base station transmits auxiliary information (SIB messages or pre-configuration data) that indicates the frequency domain positions of synchronization signals. This intermediary information bridges the gap between flexible base station configuration and efficient terminal synchronization, allowing the terminal to quickly locate signals without knowing the exact raster positions in advance.
Solution Approach 2:
The patent segments the synchronization process into two parts: (1) base station flexible configuration of synchronization signal positions, and (2) terminal acquisition of position information through auxiliary messages. This segmentation allows each side to optimize for its own requirements while maintaining overall system efficiency.
3Productivity
If manufacturer pre-configures frequency domain position of sidelink service for terminal, then terminal can determine positions without searching, but flexibility for different deployment scenarios is reduced
Solution Approach 1:
The patent implements a universal solution that supports both pre-configured positions and dynamically indicated positions through SIB messages. The terminal can use pre-configuration as a baseline and override or supplement it with network-provided information, making the system adaptable to various deployment scenarios including sidelink, mMTC, NB-IoT, and IAB services.
Solution Approach 2:
The patent introduces dynamics by allowing the frequency domain positions to be either statically pre-configured or dynamically indicated by the base station through SIB messages. This dynamic adaptability enables the system to adjust to different deployment scenarios and network conditions while maintaining efficient synchronization.
Data Source
AI summary
Embodiments of this disclosure provide a signal transmission method and a communications device. The signal transmission method includes: obtaining auxiliary information of a synchronization signal of a preset operation frequency band; and transmitting or receiving the synchronization signal based on the auxiliary information, where the preset operation frequency band is an operation frequency band of a preset service, and the preset service is a sidelink service, a massive Machine-Type Communication (mMTC) service, a Narrowband Internet of Things (NB-IoT) service, or an Integrated Access Backhaul (IAB) service; or the preset operation frequency band is an unlicensed frequency band.