Fronthaul Interface Section Extension Field for RU Memory Reduction
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Solution Overview
Problem
In 5G wireless communication systems, the existing methods for transmitting control messages, management messages, and scheduling information on the fronthaul interface are inefficient, leading to increased memory burden on the radio unit (RU) due to storage of normalization parameters.
Innovation Solution
A device and method for transmitting control messages and management messages on the fronthaul interface, which includes configuring a section extension field with additional information such as a regularization parameter, and transmitting these messages to the radio unit (RU) via a fronthaul interface, thereby reducing the memory burden on the RU.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If control messages and management messages are transmitted using existing methods on the fronthaul interface, then the interface can maintain basic communication functionality, but the transmission efficiency is low and the memory burden on the radio unit increases due to storage of normalization parameters
Solution Approach 1:
The patent extracts the normalization parameter transmission from the standard control message format by introducing a dedicated section extension field. This separation allows the parameter to be transmitted independently and efficiently, reducing the memory burden on the radio unit while improving overall transmission efficiency.
Solution Approach 2:
The section extension field is nested within the existing control message structure, allowing the normalization parameter to be carried as part of the message without requiring a completely new transmission protocol. This nested approach maintains compatibility while improving efficiency.
2Measurement precision
If normalization parameters are stored in the radio unit to ensure accurate beamforming weight calculation, then the accuracy of beamforming weights is improved, but the memory burden on the radio unit increases
Solution Approach 1:
The normalization parameter is transmitted in advance through the section extension field before the radio unit needs to calculate beamforming weights. This preliminary transmission allows the radio unit to process the parameter immediately without requiring long-term storage, thereby maintaining accuracy while reducing memory burden.
3Device complexity
If scheduling information is transferred without including regularization parameters, then the message structure remains simple, but the accuracy of beamforming operations deteriorates
Solution Approach 1:
The section extension field acts as an intermediary structure that carries the regularization parameter alongside scheduling information. This intermediary mechanism maintains the simplicity of the core message structure while enabling the transmission of additional parameters needed for accurate beamforming operations.
Data Source
AI summary
A pre-5th-Generation (5G) or 5G communication system for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE) is provided. The device of a radio unit (RU) of a base station in a wireless communication system includes at least one transceiver and at least one processor coupled to the at least one transceiver, wherein the at least one processor is configured to receive a first control message including a section extension field from a digital unit (DU) via a fronthaul interface, identify additional information based on the section extension field, and acquire a beamforming weight based on the additional information, wherein the first control message is configured to schedule a terminal in a control plane.