Multi-Link Wi-Fi Channel Selection for STR Interference Control
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Solution Overview
Problem
In multi-link communication, interference between frequency channels used in a communication device can hinder Simultaneous Transmit and Receive (STR) operations, making independent communication on each link impossible.
Innovation Solution
A communication device with multiple interfaces determines frequency channels for each link based on obtained frequency separation information to enable STR operations, ensuring appropriate channel separation for parallel communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency channels are separated to enable STR operations, then communication efficiency is improved, but frequency channel selection complexity increases
Solution Approach 1:
The system performs frequency separation determination in advance by checking whether the frequency separation between first and second frequency channels used in parallel is equal to or greater than a predetermined threshold. This preliminary check enables STR operation capability determination before actual communication, avoiding complex real-time decisions and improving communication efficiency while maintaining manageable complexity.
2Productivity
If multiple communication interfaces operate in parallel, then throughput is increased, but interference between interfaces increases
Solution Approach 1:
The system changes the frequency channel parameters of communication interfaces based on determined STR operation capabilities. When STR is supported, frequency channels are selected with sufficient separation; when STR is not supported, frequency channels are assigned to avoid interference. This dynamic parameter adjustment enables multiple interfaces to operate in parallel with increased throughput while minimizing interference through appropriate frequency separation.
Data Source
AI summary
A communication device is configured to include first and second interfaces (STA and AP functions) that are communication interfaces capable of being used for communication with mutually-different counterpart devices. The communication device obtains frequency separation information indicating frequency separation between links for enabling an STR operation of transmitting and receiving simultaneously on a plurality of links in a case of performing the multi-link communication. Further, in a case where the second interface is started after the first interface has been started, the communication device selects, based on the frequency separation information, frequency channels to be used on links of the second interface.