MIMO Transmission With Segmented DU-RU Scheduling Fields
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Solution Overview
Problem
Existing 5G communication systems face challenges in efficiently managing data transmission in massive MIMO systems due to the need for standardized interfaces between digital units (DUs) and radio units (RUs) to support various services and system requirements, particularly in open radio access networks (O-RANs).
Innovation Solution
A multi-user precoding system is introduced, defining an interface between DUs and RUs, which includes scheduling-related parameters such as user equipment identifiers (ueIDs) and layer information, enabling efficient beamforming and interference compensation through channel feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a standardized interface between DUs and RUs is implemented to support various 5G services and IoT applications, then system adaptability and versatility are improved, but device complexity increases due to the need for precise scheduling-related parameter management
Solution Approach 1:
The interface protocol is segmented into distinct fields: a first section extension field containing scheduling-related parameters (ueIDs, layer information) and a second section extension field containing channel feedback information. This segmentation allows each field to be optimized independently for its specific function while maintaining overall interface standardization.
Solution Approach 2:
The standardized interface structure serves multiple functions simultaneously: it transmits scheduling information for multi-user MIMO operations, carries channel feedback for precoding calculations, and supports various 5G services and IoT applications through a unified protocol, thereby achieving universality.
2Reliability
If multi-user precoding with channel feedback is implemented to enhance beamforming and interference management, then transmission reliability is improved, but loss of information increases due to the complexity of managing scheduling-related parameters
Solution Approach 1:
The interface incorporates a second section extension field that carries channel feedback information from the RU to the DU. This feedback mechanism enables the DU to obtain accurate channel state information and compute optimal precoding matrices, thereby improving transmission reliability through multi-user MIMO operations.
Solution Approach 2:
The protocol manages scheduling-related parameters by defining specific fields for ueIDs, layer information, and channel feedback. By standardizing parameter formats and transmission protocols, the system reduces information loss during parameter management while maintaining the complexity needed for reliable multi-user communication.
Data Source
AI summary
A communication technique for convergence between an IoT technology and a 5th generation (5G) communication system for supporting a higher data transmission rate beyond a 4th generation (4G) system, and a system thereof is provided. The method includes intelligence services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security and safety related services, and the like.) On the basis of a 5G communication technology and an IoT-related technology. A method includes determining a scheduling-related parameter for at least one user, and transmitting scheduling information indicating the scheduling-related parameter to a radio unit (RU), wherein the scheduling information includes a first section extension field including information relating to a user equipment identifier (ueID) related to the at least one user, and a second section extension field including information relating to a number of ueIDs corresponding to each user.