Control User Plane Connection Signaling Overhead Reduction
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Solution Overview
Problem
The 5G mobile communication era poses significant challenges to the transmission capacity and latency requirements of the front haul network interface between a building baseband unit (BBU) and a remote radio unit (RRU) in the LTE system, particularly due to the high data transmission rates and bandwidth demands, which strain network deployment costs and efficiency.
Innovation Solution
The solution involves a method for establishing and updating connections between control plane and user plane devices, where each device transmits request and response messages containing information about itself, allowing for efficient resource management and deployment, reducing signaling overhead and latency by carrying multiple pieces of information in a single message, and enabling independent deployment and configuration of control plane and user plane entities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If control plane and user plane are connected through traditional interface protocols, then connection establishment is possible, but signaling overhead and latency increase
Solution Approach 1:
The patent combines multiple pieces of information (device identifiers, capability information, configuration parameters) into single composite messages. The control plane device sends both its own information and user plane device information in one request message, reducing the number of signaling exchanges and lowering latency.
Solution Approach 2:
The interface message structure is designed to carry multiple types of information simultaneously - device identification, capability negotiation, and configuration data - making a single message serve multiple functions that traditionally required separate signaling steps.
2Productivity
If CPRI interface transmits high data rates, then transmission capacity increases, but bandwidth requirements and deployment costs increase
Solution Approach 1:
The patent segments the baseband unit into control plane and user plane entities that can be independently deployed. This allows flexible resource allocation where user plane functions can be distributed to edge locations closer to radio units, reducing the bandwidth burden on centralized CPRI interfaces while maintaining high data transmission rates where needed.
3Adaptability or versatility
If control plane and user plane are deployed together, then deployment simplicity is maintained, but network flexibility and resource management efficiency decrease
Solution Approach 1:
The patent divides the integrated baseband unit into separate control plane and user plane entities. These segmented entities can be deployed independently - control plane in centralized locations and user plane distributed at edges - providing network flexibility and adaptive resource management while the standardized interface protocol maintains deployment simplicity.
Solution Approach 2:
The patent introduces a standardized interface protocol as an intermediary between control plane and user plane entities. This mediator enables independent deployment and flexible resource allocation while maintaining simple, standardized connection establishment procedures through structured request-response messages.
Data Source
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AI summary
Provided are a connection method, a configuration updating method, a control plane device and a user plane device. The method includes: transmitting, by a control plane device, a first request message for establishing a connection to a user plane device, where the first request message for establishing the connection includes information about the control plane device; and transmitting, by the user plane device, a first response message indicating that the connection is successfully established or a first response message indicating that the connection fails to be established to the control plane device, where the first response message indicating that the connection is successfully established includes information about the user plane device, and the first response message indicating that the connection fails to be established includes the information about the user plane device and a reason why the connection fails to be established. Further provided is a storage medium.