OFDMA Frequency Resource Scheduling via Interference Reporting
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Solution Overview
Problem
In Wi-Fi 6 networks using OFDMA, uplink frequency band interference occurs when multiple users transmit data simultaneously, leading to reduced throughput due to bandwidth interference, which affects user experience.
Innovation Solution
A method where a STA device reports frequency-domain interference information to an AP, allowing the AP to avoid interference subbands when allocating uplink resources, thereby selecting optimal RU resources for data transmission, thereby reducing interference impact and improving throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple users simultaneously transmit data in OFDMA mode, then network capacity and throughput are improved, but frequency band interference increases and user experience deteriorates
Solution Approach 1:
The patent segments the frequency band into multiple subbands and assigns different subbands to different users for simultaneous transmission. The AP divides the available spectrum into multiple RUs (Resource Units), each occupying a specific subband, allowing multiple users to transmit data concurrently without interfering with each other. This segmentation resolves the contradiction by enabling high network capacity while preventing frequency band interference through orthogonal frequency allocation.
2Productivity
If the entire channel is divided into fixed-size resource units, then resource allocation efficiency is improved, but flexibility in avoiding interference is reduced
Solution Approach 1:
The patent implements dynamic resource unit allocation where the AP can flexibly assign different numbers of subcarriers to different RUs based on channel conditions and user requirements. Instead of fixed-size resource units, the system dynamically adjusts the granularity and distribution of RUs across frequency subbands, allowing optimal avoidance of interference while maintaining high resource allocation efficiency. This dynamic approach resolves the contradiction by adapting resource allocation to real-time channel conditions.
Data Source
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AI summary
This application provides a method for scheduling a frequency-domain resource in OFDMA, a STA, an AP, and a communications system, and relates to the field of communications technologies. In a Wi-Fi 6 OFDMA mode, because a bandwidth allocated to a user may be interfered with, the following is proposed in this application: A STA device reports STA-side frequency-domain interference information to an AP device, where the frequency-domain interference information indicates a STA-side frequency-domain interference subband, so that the AP device avoids, based on the STA-side frequency-domain interference information, the frequency-domain interference subband when allocating an uplink frequency-domain resource to the STA device, selects a proper RU resource, and allocates the proper RU resource to the STA device for data transmission. In this way, the AP device cooperates and interacts with the STA device to schedule a frequency-domain resource in OFDMA, which may reduce impact of frequency-domain interference on Wi-Fi transmission, and improve throughput in data transmission on a large OFDMA bandwidth.