Multi-AP Channel Sounding With Dialog Token Coordination
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Solution Overview
Problem
Existing wireless fidelity technologies face challenges in performing channel sounding across multiple access points (APs) deployed on the same frequency, leading to interference and limiting data transmission rates.
Innovation Solution
A method and apparatus for channel sounding across APs, involving the exchange of channel sounding results using a sounding dialog token number to identify the correct AP, allowing concurrent data transmission without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple APs are deployed on the same frequency to improve network coverage, then network coverage is improved, but interference between APs occurs and data transmission rate decreases
Solution Approach 1:
The patent segments the channel sounding process into multiple phases with different dialog token numbers. Different APs are assigned different dialog token numbers (e.g., first dialog token for AP1, second dialog token for AP2), allowing them to perform channel sounding simultaneously without interference. This segmentation enables multiple APs to operate on the same frequency while maintaining distinct channel measurement processes.
2Productivity
If multiple APs perform concurrent data transmission to improve data transmission rate, then data transmission rate is improved, but interference between APs occurs
Solution Approach 1:
The patent introduces dialog token numbers as an intermediary mechanism to coordinate channel sounding between multiple APs. The dialog token number acts as a mediator that identifies which AP is performing channel sounding at any given time, allowing APs to take turns or operate simultaneously without causing interference to each other's channel measurements.
3Productivity
If channel sounding is performed across APs to enable interference nulling mode, then data transmission rate is improved, but channel sounding mechanism complexity increases
Solution Approach 1:
The patent implements periodic channel sounding where APs perform channel measurements at specific intervals using different dialog token numbers. This periodic approach allows APs to share channel information systematically, enabling interference nulling mode without requiring continuous complex coordination between all APs, thus managing the complexity through structured periodic exchanges.
Data Source
AI summary
This application discloses a channel sounding method and a communication apparatus. The method includes: A first access point receives a channel transfer command frame from a controller or a central access point, and sends a channel transfer frame to a second access point. The channel transfer command frame indicates the first access point to send a channel sounding result of at least one station to the second access point. The channel transfer command frame includes a first sounding dialog token number. The channel transfer frame carries a channel sounding result corresponding to a first sounding dialog token in channel sounding results of a plurality of stations. The first access point forwards the channel sounding result of the at least one station to the second access point.