CU–DU Access Network Architecture for 5G-to-6G Evolution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge of constructing a flexible and adaptable 6G communication network that ensures smooth evolution from 5G/4G networks is urgent, given the introduction of new functions such as intelligence, computing power, security, and energy supply in 6G systems.
Innovation Solution
The implementation of a communication system with a CU and DU architecture that includes multiple types of CUs and DUs, allowing for mixed deployment of 6G and 5G standards, enabling seamless transition and adaptation to 6G network standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-type CU and DU architecture is used, then the network structure is simple, but the system lacks flexibility and cannot adapt to 6G standards
Solution Approach 1:
The base station is segmented into two independent functional units: CU (Centralized Unit) and DU (Distributed Unit). This segmentation allows each unit to be independently deployed and configured, enabling the network to flexibly adapt to different 6G requirements while maintaining a relatively simple overall structure. The CU handles higher-layer protocols and control functions, while the DU manages lower-layer protocols and radio functions.
Solution Approach 2:
The CU and DU are designed as universal building blocks that can be deployed in multiple configurations. The CU can support multiple DUs, and different types of CUs and DUs can be combined to meet various 6G network requirements. This multi-functionality enables the same basic architecture to serve diverse scenarios including enhanced mobile broadband, ultra-reliable low-latency communication, and massive machine type communication.
2Adaptability or versatility
If multiple types of CUs and DUs are deployed, then the system adaptability improves, but the device complexity increases
Solution Approach 1:
By segmenting the base station into standardized CU and DU units with well-defined interfaces, the patent enables multiple types of CUs and DUs to be deployed without creating a monolithic complex system. Each segment remains relatively simple individually, but their combinations provide high adaptability for 6G networks.
3Adaptability or versatility
If CU and DU separation is implemented, then the system functionality is enhanced, but the network complexity increases
Solution Approach 1:
The functional separation of CU and DU enables enhanced system capabilities while managing complexity through modular design. The CU handles complex higher-layer functions including radio resource management, mobility management, and protocol stack processing, while the DU focuses on simpler lower-layer functions including physical layer processing and radio frequency management. This segmentation allows each unit to be optimized independently.
Solution Approach 2:
The patent introduces standardized interfaces between CU and DU units that act as intermediaries, enabling flexible deployment and configuration. These interfaces define clear protocols for communication and coordination, allowing the network to achieve enhanced functionality without proportionally increasing complexity, as the interfaces abstract and standardize the interactions between different functional units.
Data Source
AI summary
Provided are an access network and a communication system. The access network includes a centralized unit (CU) and a distributed unit (DU), where the DU is connected to the CU; and the CU includes at least one type of CU, and the DU includes at least one type of DU. When the CU and the DU are each of only one type, the CU and the DU correspond to different types; or the CU includes multiple types of CUs; or the DU includes multiple types of DUs.