OFDMA Resource Unit Layout for Wider AP Coverage
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Solution Overview
Problem
In existing Wi-Fi protocols like Wi-Fi 6 and Wi-Fi 7, the contiguous allocation of subcarriers to terminals results in low Power Spectral Density (PSD) and limited cell coverage due to low energy availability, leading to imbalanced uplink and downlink transmission power and susceptibility to signal attenuation affecting overall data transmission quality.
Innovation Solution
Implementing a data transmission method where subcarriers within Resource Units (RUs) are divided into spaced subcarrier groups, creating Distributed Resource Units (dRUs) to disperse subcarrier distribution, enhancing signal coverage and balancing uplink and downlink power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If subcarriers are allocated contiguously to terminals in OFDMA mode, then resource allocation efficiency is improved, but Power Spectral Density (PSD) decreases and cell coverage is limited
Solution Approach 1:
The patent segments the contiguous subcarriers into multiple spaced subcarrier groups within the Resource Unit. Instead of allocating all subcarriers contiguously to a terminal, the subcarriers are divided into several groups with gaps between them, which increases the Power Spectral Density in specific frequency regions and extends cell coverage while maintaining resource allocation efficiency.
2Device complexity
If subcarriers are allocated contiguously to terminals, then transmission power distribution is simplified, but uplink and downlink transmission power become imbalanced
Solution Approach 1:
The patent applies local quality by creating different subcarrier group configurations for uplink and downlink transmissions. The spaced subcarrier groups allow different power distribution patterns to be applied in different frequency regions, enabling independent optimization of uplink and downlink power balance while maintaining manageable system complexity.
3Speed
If contiguous subcarrier allocation is used, then data transmission speed is maintained, but signal attenuation affects overall data transmission quality
Solution Approach 1:
By segmenting contiguous subcarriers into spaced subcarrier groups, the patent ensures that signal attenuation in one frequency region does not affect all subcarriers allocated to a terminal. The gaps between subcarrier groups provide frequency diversity, maintaining data transmission quality while preserving transmission speed through efficient use of available subcarriers.
Data Source
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AI summary
The examples of the present disclosure provide a data transmission method, an Access Point (AP), a terminal, and a device, which relate to the field of communication technology. The method is applied to an AP, and includes: performing data transmission with a terminal through subcarriers contained in a Resource Unit (RU) corresponding to the terminal; wherein, RUs corresponding to different terminals are different, the subcarriers contained in the RU are divided into one or more subcarrier groups, each subcarrier group contains a first preset number of subcarriers, and the subcarriers contained in each subcarrier group are spaced by other subcarriers that do not belong to that subcarrier group. Implementing the examples of the present disclosure can achieve data transmission between the AP and the terminal based on the Orthogonal Frequency Division Multiple Access (OFDMA) mode, improve data transmission stability, enhance the coverage radius of the AP's cell, and improve the balance of uplink and downlink power.