OFDMA Subcarrier Allocation for 6 GHz Gateway
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Solution Overview
Problem
Current Wi-Fi technologies face challenges in efficiently utilizing the 6 GHz band for both Wide Area Network (WAN) and Local Area Network (LAN) traffic due to the need for separate physical interfaces, which is costly and inefficient, especially with the limitations of existing LAN interface speeds and interference issues in the 5 GHz and 2.4 GHz spectrums.
Innovation Solution
A gateway device with a single 6 GHz Wi-Fi radio configured to operate as both WAN and LAN interface, utilizing orthogonal frequency division multiple access (OFDMA) subcarrier allocation to dynamically manage traffic loads and allocate channel bandwidth proportionally for efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate physical interfaces are used for WAN and LAN, then interface reliability is improved, but device cost and complexity increase
Solution Approach 1:
The patent combines WAN and LAN interfaces into a single shared physical radio interface, using virtual interface technology to create separate logical interfaces (wan0, lan0) from one physical device. This merging approach reduces hardware complexity and cost while maintaining the functional separation and reliability of distinct WAN and LAN interfaces through software-based virtualization.
Solution Approach 2:
The single physical radio interface is designed to serve multiple functions simultaneously - acting as both WAN and LAN interface through virtualization. This multi-functional design allows the same hardware resource to fulfill different network interface roles, eliminating the need for dedicated separate interfaces while preserving their individual functionalities.
2Adaptability or versatility
If OFDMA subcarrier allocation is left to vendors, then implementation flexibility is improved, but allocation optimization and network performance worsen
Solution Approach 1:
The patent implements a standardized OFDMA subcarrier allocation mechanism that dynamically adjusts allocation parameters based on traffic conditions, QoS requirements, and channel state information. This standardized approach optimizes network throughput by systematically managing subcarrier distribution across multiple users and services, while still allowing vendor-specific implementations to adapt the parameters to their particular hardware capabilities and service requirements.
3Productivity
If 6 GHz band is used for both WAN and LAN, then spectrum efficiency is improved, but interference management and signal quality worsen
Solution Approach 1:
The patent segments the 6 GHz spectrum usage by creating separate virtual interfaces (wan0, lan0) that operate on the same physical radio but are logically separated. This segmentation allows independent management and configuration of WAN and LAN traffic, enabling interference mitigation through separate power control, modulation schemes, and resource allocation strategies for each virtual interface while utilizing the full 6 GHz band capacity.
Data Source
AI summary
A method of OFDMA subcarrier allocation for stations in a wireless network includes determining a total downlink buffered traffic load for downlink traffic from a gateway device to the stations, and receiving a total uplink buffered traffic load for uplink traffic from the stations to the gateway device. The method further includes determining a first ratio of total downlink buffered traffic load for each station in relation to total downlink buffered traffic load for all stations, determining a second ratio of total uplink buffered traffic load for each station in relation to total uplink buffered traffic load for all stations, performing OFDMA subcarrier allocation for the downlink traffic by assigning available channel bandwidth proportional to the first ratio for each station, and performing OFDMA subcarrier allocation for the uplink traffic by assigning available channel bandwidth proportional to the second ratio for each station.