O-RAN Reception Dimension Adaptation for Fronthaul Bandwidth Constraints
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Solution Overview
Problem
In O-RAN systems, the maximum bandwidth supported by the interface between the digital unit (DU) and the radio unit (RU) is often smaller than the required bandwidth, leading to reduced array gain and diversity gain, and decreased base station performance.
Innovation Solution
An electronic device that determines an optimal reception dimension between the RU and the DU based on channel environments and scheduling situations, using a processor to measure signal quality, calculate expected throughput, and adjust the reception dimension accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the interface bandwidth between RU and DU is increased to support larger reception dimension, then the array gain and diversity gain are improved, but the fronthaul bandwidth requirement exceeds the maximum supported bandwidth
Solution Approach 1:
The patent applies dynamics by making the reception dimension configurable and adaptable. The base station can dynamically adjust the reception dimension (number of receive antennas) based on channel conditions, traffic requirements, and fronthaul bandwidth availability. This allows the system to optimize between array gain/diversity gain and fronthaul bandwidth consumption in real-time, rather than being fixed to a static configuration.
2Reliability
If the reception dimension is increased to improve signal quality, then the array gain is improved, but the fronthaul bandwidth requirement increases beyond what the interface can support
Solution Approach 1:
The patent applies parameter changes by allowing the reception dimension to be adjusted as a configurable parameter. The base station can change the reception dimension parameter based on channel quality indicators, signal-to-noise ratio, and fronthaul bandwidth constraints. This enables the system to adapt signal quality optimization to the actual bandwidth capabilities of the fronthaul interface.
3Productivity
If the maximum bandwidth of the interface is exceeded to support higher throughput, then the data rate is improved, but the interface cannot handle the bandwidth requirement
Solution Approach 1:
The patent applies dynamics by enabling dynamic adjustment of the reception dimension based on throughput requirements and interface capacity. When higher throughput is needed, the system can increase the reception dimension up to the point where the fronthaul bandwidth requirement matches the interface capacity, rather than exceeding it. This dynamic adaptation allows the system to maximize throughput within the physical constraints of the interface.
Data Source
AI summary
An electronic device and a method are provided. The electronic device includes communication circuitry configured to receive signals from at least one user equipment (UE), and a processor, wherein the processor may be configured to determine a reception quality of a signal obtained through the communication circuitry, obtain an offset corresponding to a channel characteristic of the signal, determine, based on the offset indicating a signal quality difference corresponding to a difference between a reception dimension (Rx dimension) at signal reception and a target Rx dimension and the reception quality, an expected reception quality corresponding to the target Rx dimension, pre-schedule the target Rx dimension and a frequency resource to the at least one UE, determine an expected throughput for the at least one UE based on the expected reception quality, determine the target Rx dimension, and receive or transmit data from or to the UE.