Dual-Connectivity Base Station Band List for SCG Configuration
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Solution Overview
Problem
In EN-DC, the secondary node (SN) may fail to select a supported NR frequency bandwidth due to limited band combinations indicated by the master node (MN), leading to configuration failures in dual connectivity.
Innovation Solution
The MN includes all supported band combinations of the primary cell in the allowedBC-ListMRDC, allowing the SN to select from a broader range of band combinations, reducing the likelihood of configuration failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the master node limits the band combinations indicated to the secondary node, then the configuration complexity is reduced, but the configuration success rate decreases
Solution Approach 1:
The master node pre-configures and indicates all possible band combinations including primary cell bands to the secondary node before actual connection establishment. This preliminary action ensures the secondary node has complete band combination information available, eliminating configuration failures while maintaining manageable complexity through structured pre-planning.
2Ease of operation
If the secondary node selects from a limited set of band combinations, then the selection process is simplified, but the probability of configuration failure increases
Solution Approach 1:
The master node pre-configures and indicates all possible band combinations including primary cell bands to the secondary node before actual connection establishment. This preliminary action ensures the secondary node has complete band combination information available, eliminating configuration failures while maintaining manageable complexity through structured pre-planning.
Data Source
AI summary
A base station includes a reception unit configured to receive, from a terminal, information indicating band combinations supported by the terminal; a control unit configured to generate first information indicating all band combinations including a supported band of a primary cell among the band combinations supported by the terminal; and a transmission unit configured to transmit the first information to a secondary node. The reception unit is configured to receive, from the secondary node, second information indicating a band combination used by the secondary node among the all band combinations, and the transmission unit is configured to transmit the second information to the terminal.