Central Unit Resource Management via Fronthaul Interface
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Solution Overview
Problem
Current 5G base station configurations face challenges in dynamically managing resources and ensuring compatibility between base stations, particularly in setting up and releasing resources efficiently using internal and external protocols, which affects communication with user equipment.
Innovation Solution
A method and apparatus for a central unit (CU) in a base station that generates and transmits UE context setup messages through a fronthaul interface to distributed units (DUs), allowing for efficient management of radio resources by separating control and user planes using internal protocols, enabling successful resource setup and release operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If base stations use dynamic configuration to provide customized services, then service adaptability is improved, but device complexity increases
Solution Approach 1:
The base station is divided into a central unit (CU) and distributed units (DUs), with specific functions separated between them. The CU handles control plane functions while DUs handle user plane functions, allowing dynamic service configuration without requiring complete redesign of the entire base station system.
Solution Approach 2:
The base station configuration is made dynamic through the CU-DU architecture, where the CU can dynamically configure and reconfigure DUs based on service requirements. This allows the system to adapt to different services (eMBB, URLLC, mMTC) without hardware changes, resolving the contradiction between adaptability and complexity.
2Productivity
If control plane and user plane are separated using internal protocols, then resource management efficiency is improved, but protocol complexity increases
Solution Approach 1:
The control plane and user plane are segmented into separate functional entities within the CU-DU architecture. Control plane messages are handled by the CU while user plane data flows through the DUs, with clear protocol boundaries defined between them. This segmentation improves resource management efficiency by allowing independent optimization of control and data paths.
Solution Approach 2:
The fronthaul interface acts as an intermediary between the CU and DUs, with well-defined protocols that simplify the interaction complexity. The interface provides standardized mechanisms for control message exchange and user data transmission, making the overall system easier to manage despite the separation of functions.
3Speed
If fronthaul interface is used for CU-DU communication, then resource setup speed is improved, but interface complexity increases
Solution Approach 1:
The fronthaul interface is pre-configured with standardized protocols and procedures for rapid resource setup. The CU can immediately initiate resource allocation procedures with DUs without requiring complex negotiation or configuration exchanges, thereby improving resource setup speed while maintaining manageable interface complexity through standardization.
Data Source
AI summary
Provided are a method of a central unit (CU) included in a gNB for managing radio resources and an apparatus thereof. The method may include generating a UE context setup message to be transmitted to one or more distributed units (DUs) associated with the central unit, transmitting the UE context setup message to the one or more DUs through a fronthaul interface, and receiving a response message for the UE context setup message from the one or more DUs through the fronthaul interface.