CU-DU Full Configuration Signaling for Accurate SCG Parsing
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Solution Overview
Problem
In a 5G mobile communications system, when a base station with a CU-DU architecture is used as a secondary base station, the distributed unit (DU) fails to correctly obtain configuration information of a secondary cell group (SCG) due to parsing issues, leading to system errors.
Innovation Solution
The DU sends cell group configuration information and/or a first instruction to the central unit (CU) to trigger full configuration, and the CU generates radio bearer configuration information with full configuration, ensuring accurate understanding of SCG configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the DU uses reference configuration information sent by the CU, then the device complexity is reduced, but the parsing accuracy of SCG configuration information deteriorates
Solution Approach 1:
The patent changes the parameter of configuration information completeness from partial (reference configuration) to full configuration. By triggering the CU to provide full SCG configuration information instead of reference configuration, the parsing accuracy is improved while the complexity increase is managed through conditional triggering mechanisms.
Solution Approach 2:
The patent implements a feedback mechanism where the DU sends first indication information to the CU based on parsing results or configuration needs. This feedback loop enables the CU to adjust the configuration information provided, ensuring accurate parsing while managing complexity through interactive adjustment rather than static partial configuration.
2Measurement precision
If full configuration information is provided by the CU, then the parsing accuracy is improved, but the information transmission volume increases
Solution Approach 1:
The patent applies preliminary action by having the DU first send indication information before requesting full configuration. This preliminary step allows the system to determine whether full configuration is actually needed, avoiding unnecessary transmission of complete configuration data when reference configuration suffices, thus managing information volume while ensuring accuracy when required.
Solution Approach 2:
The patent makes the configuration information transmission dynamic rather than static. The CU dynamically adjusts the level of configuration information provided (reference vs. full) based on real-time conditions such as parsing failures or specific configuration needs, optimizing the balance between information volume and parsing accuracy.
3Reliability
If the DU triggers full configuration through first instruction, then the reliability is improved, but the processing time increases
Solution Approach 1:
The patent uses feedback mechanisms where the DU monitors configuration parsing results and sends indication information to the CU. This feedback enables reliable detection of parsing issues and triggers full configuration only when necessary, improving reliability while minimizing unnecessary processing time delays.
Solution Approach 2:
The patent applies preliminary action by having the DU perform initial parsing with reference configuration before triggering full configuration. This preliminary step quickly identifies whether additional configuration is needed, reducing the time spent on full configuration processing by avoiding it when not required, while still ensuring reliability when parsing failures occur.
Data Source
AI summary
Embodiments of this application provide communications methods and apparatuses. In an embodiment, a communications method comprises: sending, by a centralized unit (CU) to a distributed unit (DU), a full configuration indication; and receiving, by the CU from the DU, a cell group configuration generated based on the full configuration indication.