CU-DU CAG Cell Configuration Coordination
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Solution Overview
Problem
In the 5G mobile communication network architecture with a centralized unit (CU) and distributed unit (DU) split, there is a lack of methods or processes for configuring closed access group (CAG) cells, which hinders the coordination of CAG cell access and resource management among base stations.
Innovation Solution
A method and apparatus are provided to configure CAG cells by allowing the CU to acquire and notify DU units of CAG cell configuration information, enabling DU units to send configuration data to the CU, and facilitating cooperation between CU and DU nodes for paging and initial user access based on CAG cell configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the base station is split into CU and DU functional entities, then networking flexibility and adaptability are improved, but the complexity of cell management and coordination between nodes increases
Solution Approach 1:
The base station is segmented into CU and DU functional entities with clear division of responsibilities. The CU handles non-real-time functions including CAG cell configuration acquisition and management, while the DU handles real-time functions. This segmentation resolves the contradiction by distributing complexity across separate entities while maintaining overall system flexibility.
Solution Approach 2:
The F1 interface acts as an intermediary communication channel between CU and DU, establishing standardized protocols for exchanging CAG cell configuration information. This mediator enables coordinated operation without requiring complex direct integration, thus managing complexity while preserving adaptability.
2Reliability
If CAG cell configuration is implemented in CU-DU split architecture, then non-public network access control capability is improved, but the coordination process between CU and DU nodes increases complexity
Solution Approach 1:
The CU acquires CAG cell configuration information in advance from the management entity before actual CAG operations begin. This preliminary action ensures that access control parameters are ready when needed, improving reliability without adding operational complexity during critical moments.
Solution Approach 2:
The DU provides feedback to the CU regarding CAG cell configuration status and operational state. This feedback mechanism enables the CU to adjust coordination strategies based on actual conditions, maintaining access control reliability while adapting coordination complexity to actual needs rather than using fixed complex procedures.
Data Source
AI summary
Provided are a non-public network configuration method and apparatus, a centralized unit (CU), a distributed unit (DU), a base station, and a computer-readable storage medium. The method includes: a CU acquiring configuration information of closed access group (CAG) cells of at least one DU in a base station to which the CU belongs; and the CU determining information about an activated CAG cell according to the configuration information of the CAG cells, and notifying the at least one DU of the information about the activated CAG cell.