5G Fronthaul Port Mapping for Cell Access Redundancy
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Solution Overview
Problem
The robustness of cell service in wireless communication systems is compromised by failures in fronthaul ports, necessitating a method to enhance stability and redundancy in fronthaul transmission.
Innovation Solution
A method and device that transmit data streams corresponding to control or user planes through multiple fronthaul ports, specifically mapping the access layer for cell connection to an additional port, ensuring redundancy and robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data streams are transmitted through a single fronthaul port, then the device complexity is reduced, but the reliability of cell service deteriorates due to port failures
Solution Approach 1:
The fronthaul transmission is segmented into multiple independent ports, where critical data streams (access layer for cell connection) are separated and transmitted through dedicated ports distinct from non-critical data streams (control and user planes). This segmentation ensures that failures in one port do not affect the entire cell service, thereby improving reliability without requiring a completely complex redundant system.
Solution Approach 2:
Different quality levels of protection are applied to different data streams based on their importance. The access layer data stream, which is critical for cell connection, receives enhanced protection through dedicated port transmission, while control and user plane data streams use standard multi-port transmission. This local quality approach optimizes reliability for critical functions without unnecessarily complicating the entire system.
2Reliability
If multiple fronthaul ports are configured for redundancy, then the reliability of cell service is improved, but the device complexity increases
Solution Approach 1:
The system performs preliminary configuration by pre-assigning specific data streams to specific fronthaul ports based on their criticality. The access layer stream is pre-configured to use a dedicated port, while other streams are pre-configured to use available ports. This preliminary action simplifies real-time management during operation, as the system only needs to monitor and switch pre-defined assignments rather than dynamically allocating resources, thus reducing operational complexity while maintaining high reliability.
3Reliability
If critical data streams are mapped to dedicated ports, then the robustness of cell service is enhanced, but the device complexity increases due to mapping management
Solution Approach 1:
The system changes the parameter of port assignment from dynamic to static for critical data streams. By fixing the mapping between access layer streams and dedicated fronthaul ports, the system eliminates the complexity of dynamic mapping management while ensuring that critical cell connection data always has a guaranteed transmission path. This parameter change simplifies the mapping management process while maintaining enhanced robustness for cell service.
Data Source
AI summary
The disclosure relates to a pre-5th-Generation (5G) or 5G communication system to provide for supporting higher data rates beyond a 4th-Generation (4G) communication system. A method performed by a distributed unit (DU) in a wireless communication system is provided. The method includes transmitting one or more data streams of a message of a control plane or a user plane, which correspond to one or more layers, to a radio unit (RU) through a first fronthaul port, and transmitting a data stream corresponding to an access layer, which is the first layer used for connection of a cell among the one or more layers, to the RU through a second fronthaul port configured between the DU and the RU.