5G Control Plane Bearer Management via UP Feedback
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Solution Overview
Problem
In 5G networks, after the separation of Control Plane (CP) and User Plane (UP), the CP network element cannot obtain data transmission and flow control states of the wireless data bearer on the Distributed Unit (DU), leading to inefficiencies in network management and service delivery.
Innovation Solution
A transmission control method and device where the CP network element receives data transmission feedback messages and/or bearer management messages from the UP network element, allowing it to manage bearers based on data transmission quality, and sends measurement control information to the UP network element to measure and report data transmission states, enabling effective control of the data bearer between the UP and DU.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the CU is separated into independent network element entities (CU-CP and CU-UP), then the network can meet the requirements of various 5G services more flexibly and efficiently with independent deployment and resource extension, but the CP network element cannot obtain the data transmission state and flow control state of the wireless data bearer on the DU
Solution Approach 1:
The patent implements a feedback mechanism where the DU sends data transmission feedback messages to the CU-UP, which then forwards them to the CU-CP. This feedback loop enables the CU-CP to obtain data transmission states and flow control states of wireless data bearers even after the separation into independent network elements, thus resolving the information loss problem while maintaining deployment flexibility
Solution Approach 2:
The CU-UP acts as an intermediary between the DU and CU-CP in the information transmission path. It receives data transmission feedback from the DU and forwards it to the CU-CP, enabling the CP network element to obtain necessary state information without direct connection to the DU, thus maintaining the benefits of network element separation while ensuring information flow
2Ease of operation
If the CU-CP and CU-UP are deployed at different geographical positions, then the network can be extended in resource and upgraded in function independently, but the CP network element cannot obtain transmission state and flow control state of wireless data bearer on the DU
Solution Approach 1:
The feedback mechanism ensures that the CU-CP receives accurate data transmission states and flow control states from the DU through the CU-UP, maintaining reliable bearer control even when deployed at different geographical positions. The feedback loop preserves the reliability needed for control plane operations while enabling independent upgrading of network elements
Solution Approach 2:
The CU-UP serves as a reliable intermediary that ensures accurate transmission of control information between the DU and CU-CP. This intermediary role maintains bearer control reliability across distributed deployments while allowing each network element to be upgraded independently according to different timelines and requirements
Data Source
AI summary
Provided are a transmission control method and device. The method includes that: a Control Plane (CP) network element receives a data transmission feedback message and/or a bearer management message sent by a User Plane (UP) network element, where the bearer management message is determined by the UP network element according to data transmission quality between the UP network element and a Distributed Unit (DU), and the data transmission feedback message is configured to indicate data transmission states of the UP network element and the DU; and a bearer of the UP network element is managed according to the data transmission feedback message and/or the bearer management message.