5G System Information Transmission via Segmented MSI and RMSI
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Solution Overview
Problem
In 5G communication systems, there is a need for efficient methods to transmit and receive system information, such as minimum system information (MSI) and remaining minimum system information (RMSI), due to the differences in transmission channels and schemes required for various services like eMBB, URLLC, and mMTC.
Innovation Solution
The method involves identifying MSI included in an SS/PBCH block received from a base station, receiving a PDCCH in a control resource set indicated by the MSI, and obtaining RMSI from a PDSCH using scheduling information, where the MSI includes details like the starting symbol index, length, and subcarrier spacing, allowing for efficient time-frequency resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If system information is transmitted using different transmission channels and schemes for various services (eMBB, URLLC, mMTC), then service support capability is improved, but transmission complexity increases
Solution Approach 1:
The system information is segmented into minimum system information (MSI) and remaining minimum system information (RMSI). MSI is transmitted via PBCH in a compact form, while RMSI is transmitted separately via PDSCH. This segmentation allows the system to support multiple services with different requirements without requiring complete system information to be transmitted through a single complex channel, thereby reducing transmission complexity while maintaining service support capability.
2Manufacturing precision
If minimum system information includes detailed control resource set configuration (starting symbol index, length, subcarrier spacing), then resource allocation precision is improved, but information overhead increases
Solution Approach 1:
The patent applies local quality by providing detailed control resource set configuration parameters (starting symbol index, length, subcarrier spacing) only where necessary for precise resource allocation, while keeping the overall MSI structure compact. The detailed parameters are included in MSI when needed for accurate PDCCH/PDSCH resource identification, rather than uniformly applying detailed configuration throughout all system information.
Solution Approach 2:
The control resource set configuration parameters are provided in advance within MSI before the actual resource allocation occurs. The starting symbol index, length, and subcarrier spacing information are pre-configured in MSI, enabling the UE to correctly interpret subsequent PDCCH and PDSCH transmissions without requiring additional real-time configuration exchanges.
3Adaptability or versatility
If RMSI transmission uses PDSCH with scheduling information in PDCCH, then transmission flexibility is improved, but reception complexity increases
Solution Approach 1:
The PDCCH acts as an intermediary between the scheduling intent and the actual RMSI data transmission on PDSCH. The PDCCH carries scheduling information that mediates the resource allocation for RMSI, allowing flexible transmission while providing the UE with clear instructions on where and how to receive the RMSI data, thereby reducing reception complexity despite the flexibility gained.
Solution Approach 2:
The scheduling information for RMSI transmission is provided in advance through PDCCH before the actual RMSI data is transmitted on PDSCH. This preliminary scheduling action allows the UE to prepare for RMSI reception by knowing the time-frequency resources and other parameters in advance, reducing the complexity of real-time reception processing.
Data Source
AI summary
A method for transmitting and receiving system information in a communication system is disclosed. An operation method of a UE comprises the steps of: checking minimum system information included in an SS/PBCH block received from a base station; receiving a PDCCH in a control resource set indicated by the minimum system information; checking a time-frequency resource through which a PDSCH including RMSI is to be transmitted, on the basis of scheduling information included in the PDCCH; and acquiring the RMSI from the PDSCH received in the time-frequency resource. Therefore, the performance of the communication system can be improved.