Synchronization Signal Block Segmentation for 5G Initial Access
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Solution Overview
Problem
In 5G wireless communication systems, terminals face challenges in efficiently detecting subcarrier spacings during initial access, which hinders efficient initial access and data transmission, especially when multiple subcarrier spacings are supported, and there is a need for dynamic resource allocation to meet varying service requirements.
Innovation Solution
A method where a base station generates and transmits a synchronization signal based on the subcarrier spacing, allowing terminals to detect and determine the subcarrier spacing, enabling efficient initial access and dynamic subframe type allocation for TDD and FDD systems to support various services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple subcarrier spacings are supported in one 5G system, then service versatility and adaptability are improved, but terminal complexity and initial access difficulty increase
Solution Approach 1:
The patent segments the synchronization signal transmission into multiple SS blocks, each associated with a specific subcarrier spacing. This allows terminals to detect and access the appropriate SS block for their service requirements without needing to process all possible subcarrier spacings simultaneously, thereby reducing terminal complexity while maintaining service versatility.
Solution Approach 2:
The patent introduces dynamic subframe type allocation where subframes can be dynamically configured as uplink or downlink based on service requirements. This dynamic configuration allows the system to adapt to different services (eMBB, mMTC, URLLC) with different latency and reliability requirements, improving service versatility while using standardized procedures to manage terminal complexity.
2Adaptability or versatility
If multiple subcarrier spacings are supported in one 5G system, then service versatility is improved, but initial access efficiency deteriorates
Solution Approach 1:
The patent performs preliminary action by pre-configuring multiple SS blocks with different subcarrier spacings before terminal access. Terminals can directly detect and select the appropriate SS block based on their service requirements without needing to perform complex detection procedures, thereby improving initial access efficiency while supporting multiple services.
Solution Approach 2:
The patent uses different synchronization signal sequences (analogous to color changes) to indicate different subcarrier spacings. Terminals can quickly identify the appropriate subcarrier spacing by detecting the sequence characteristics, improving initial access efficiency while maintaining support for multiple services with different requirements.
3Adaptability or versatility
If dynamic subframe type allocation is implemented, then service adaptability is improved, but system complexity increases
Solution Approach 1:
The patent implements a universal downlink control information (DCI) format that can dynamically indicate both subframe type allocation and resource allocation. This multi-functional DCI structure allows the system to adapt to different services without requiring separate control mechanisms, thereby improving service adaptability while managing system complexity through standardized procedures.
4Adaptability or versatility
If synchronization signal is transmitted with different subcarrier spacings, then service coverage is improved, but detection difficulty increases
Solution Approach 1:
The patent uses distinct synchronization signal sequences for different subcarrier spacings, allowing terminals to quickly identify the appropriate subcarrier spacing through sequence detection rather than complex parameter analysis. This approach improves service coverage by supporting multiple subcarrier spacings while reducing detection difficulty through recognizable sequence patterns.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present invention is a method by which a base station transmits a signal in a wireless communication system for efficiently performing an initial access procedure of a terminal, the method comprising the steps of: generating the synchronization signal on a basis of subcarrier spacing used in the synchronization signal; and transmitting the synchronization signal to the terminal.