Fronthaul Control Messages for Multi-Port Beam Grouping
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Solution Overview
Problem
The increasing demand for wireless data traffic in 5G communication systems necessitates efficient fronthaul transmission between digital units (DUs) and radio units (RUs), requiring reduced processing burden and memory requirements while integrating information common to layers in a single message.
Innovation Solution
A method and device for transmitting control messages on the fronthaul interface by identifying a designated path and generating a control message that includes scheduling information for multiple layers, allowing the DU to transmit this information to the RU via a specific port, and for the RU to receive and process it accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate control messages are transmitted for each layer, then layer-specific scheduling information can be accurately conveyed, but the processing burden and memory requirements of DU and RU increase
Solution Approach 1:
The patent combines scheduling information for multiple layers into a single control message structure. The control message includes a first field for common scheduling information applicable to multiple layers and a second field for layer-specific scheduling information, allowing the DU and RU to process consolidated data rather than handling separate messages for each layer, thereby reducing processing burden while maintaining accuracy.
Solution Approach 2:
The control message is designed with multi-functionality to serve multiple layers simultaneously. The first field provides universal scheduling information that can be applied across different layers, while the second field adds layer-specific parameters. This universal structure allows a single message to perform the work of multiple separate messages, reducing the complexity at both DU and RU.
2Loss of information
If multiple control messages are transmitted for different layers, then complete scheduling information is provided, but the fronthaul transmission overhead increases
Solution Approach 1:
The patent merges multiple control messages into a single consolidated control message that contains scheduling information for multiple layers. By combining the first field (common scheduling information) and the second field (layer-specific scheduling information) into one message structure, the system maintains complete scheduling information while reducing the quantity of transmitted data packets over the fronthaul interface.
3Ease of operation
If layer-specific control messages are used, then detailed scheduling control is achieved, but the memory requirement for storing and processing messages increases
Solution Approach 1:
The patent merges layer-specific control information into a single control message structure with two fields. The first field stores common scheduling information that applies to multiple layers, and the second field stores layer-specific parameters. This merged structure reduces the total memory required for storing and processing control messages compared to maintaining separate messages for each layer, while still providing detailed scheduling control capability.
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). According to embodiments, a method performed by a distributed unit (DU), the method comprises generating a control plane (C-plane) message for multiple ports, the C-plane message including section information and a section extension; and transmitting the C-plane message to a radio unit (RU) via a specific port of the multiple ports. The section information includes information on a beam identifier (ID). The section extension includes beam group type information for indicating a type of beam grouping, and port information for indicating a total number of one or more extended antenna-carrier (eAxC) ports indicated by the section extension.