5G Synchronization Signal Block Frame Number Detection
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Solution Overview
Problem
The 5G communication system lacks clear methods for configuring, transmitting, and receiving synchronization signals, particularly in scenarios with variable subcarrier spacing, which is essential for supporting diverse services.
Innovation Solution
A method where a terminal receives a synchronization signal block (SS block) including a physical broadcast channel (PBCH) from a base station, estimates system frame information using a scrambling sequence, and identifies the frame number by decoding bits within the SS block, while also using a demodulation reference signal (DMRS) to obtain information about the SS block index and transmission positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a variable subcarrier spacing is supported in 5G communication system, then the system can support diverse services (eMBB, URLLC, mMTC), but the method for configuring and transmitting synchronization signals is not clearly defined
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting subcarrier spacing values (15kHz, 30kHz, 60kHz, 120kHz) based on service requirements. Different subcarrier spacing parameters are selected to support diverse services: eMBB uses 15kHz or 30kHz, URLLC uses 60kHz or 120kHz, and mMTC uses 15kHz, enabling the system to adapt to different service characteristics while maintaining clear synchronization signal configuration methods
Solution Approach 2:
The patent implements universality by creating a unified synchronization signal configuration framework that works across all service types. The SS block structure, including PSS, SSS, and PBCH with DMRS, is designed to be service-agnostic, allowing the same basic configuration to support multiple services through parameter adjustments rather than requiring separate configuration methods for each service type
2Adaptability or versatility
If synchronization signal configuration methods are not clearly defined, then the system lacks guidance for SS block transmission, but implementing variable subcarrier spacing requires precise synchronization
Solution Approach 1:
The patent applies preliminary action by performing synchronization signal transmission before data transmission. The SS block is transmitted in advance to enable the terminal to acquire timing and frequency synchronization, cell ID, and other critical information before actual communication begins. This preliminary synchronization step ensures that subsequent data transmission with variable subcarrier spacing can proceed with high precision
Solution Approach 2:
The patent uses the SS block as an intermediary element that bridges the gap between variable subcarrier spacing flexibility and synchronization precision. The SS block contains synchronization signals (PSS, SSS) and broadcast channel (PBCH) that mediate the transition from unsynchronized state to synchronized state, enabling accurate timing and frequency alignment regardless of the subcarrier spacing being used
3Productivity
If SS block transmission positions are not clearly indicated, then terminals cannot efficiently acquire synchronization, but flexible SS block positioning is needed for variable subcarrier spacing
Solution Approach 1:
The patent applies periodic action by transmitting SS blocks at regular intervals according to a predefined periodicity. The SS block is transmitted periodically in specific slots, allowing terminals to predict and efficiently acquire synchronization signals without complex position indication. The periodic transmission ensures that terminals can reliably find and decode synchronization information at expected time intervals
Solution Approach 2:
The patent segments the SS block into distinct components (PSS, SSS, PBCH with DMRS) that can be independently processed. Each segment serves a specific function: PSS for initial synchronization, SSS for cell ID identification, and PBCH for system information. This segmentation allows terminals to efficiently acquire synchronization by processing each segment in sequence, reducing overall acquisition complexity while maintaining flexibility in transmission positioning
Data Source
AI summary
A method for transmitting and receiving a synchronization signal in a communication system is disclosed. An operation method of a terminal comprises the steps of: receiving, from a base station, a synchronization signal and an SS block including a PBCH; estimating y bits among x bits for indicating a number of a system frame on which the SS block has been transmitted, on the basis of a sequence used for the scrambling of the PBCH included in the SS block; decoding the PBCH included in the SS block so as to acquire z bits among the x bits for indicating the number of the system frame on which the SS block has been transmitted; and confirming the number of the system frame on the basis of the y bits and the z bits. Therefore, the performance of a communication system can be improved.