WiFi Data Transmission Through Separate Same-Band Channels
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Solution Overview
Problem
Existing electronic devices transmit WiFi data in a Time Division Multiplexing (TDM) manner, resulting in a relatively low data transmission rate, and switching to a single-antenna mode to improve this rate leads to a halving of WiFi performance.
Innovation Solution
A radio access device sends a WiFi broadcast packet with channel information, and upon receiving a probe request frame indicating support for simultaneous transmission and reception, determines and configures separate target WiFi data transmit and receive channels within the same WiFi band, allowing simultaneous data transmission and reception without degrading performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electronic device transmits WiFi data in TDM manner, then device can alternately send or receive WiFi data within time periods, but WiFi data transmission rate is relatively low
Solution Approach 1:
The patent divides the WiFi communication channels into separate transmit channels and receive channels. The access point determines a first WiFi data transmit channel and a first WiFi data receive channel from different channel sets, allowing simultaneous operation. This segmentation of communication paths enables parallel transmission and reception, resolving the TDM limitation.
Solution Approach 2:
The patent transitions from time-division multiplexing (one dimension) to frequency-division multiplexing by selecting channels from different channel sets. By operating on different frequency channels simultaneously, the system moves to another dimension (frequency domain) to achieve parallel communication, thereby improving transmission rate without time delays.
2Productivity
If electronic device switches to single-antenna mode to improve transmission rate, then transmission rate increases, but WiFi performance is halved
Solution Approach 1:
The patent enables the WiFi system to perform multiple functions simultaneously by establishing separate transmit and receive channels. The access point can send data frames on the transmit channel while receiving data frames on the receive channel at the same time, achieving full-duplex communication without sacrificing performance. This multi-functionality resolves the contradiction between rate improvement and performance maintenance.
Data Source
AI summary
A WiFi data transmission method and apparatus are provided. The method includes: sending, by a radio access device, a WiFi broadcast packet, where the WiFi broadcast packet includes channel information of a first channel; receiving, by the radio access device through the first channel, a probe request frame sent by an electronic device; when the probe request frame indicates that the electronic device supports a simultaneous transmission and reception function, determining, by the radio access device, a target WiFi data transmit channel and a target WiFi data receive channel based on a first channel frequency of the first channel; and performing, by the radio access device, data transmission with the electronic device through the target WiFi data transmit channel and the target WiFi data receive channel, where the target WiFi data transmit channel and the target WiFi data receive channel are different channels in a same WiFi band.