Multi-Link Device With Single-Channel Sharing for Interference Control
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Solution Overview
Problem
In WIFI multi-link operation, poor channel isolation leads to in-device coexistence interference, and devices constrained by Non-Simultaneous Transmit and Receive (Non-STR) avoid simultaneous transmit and receive by methods like RTS/CTS, resulting in low communication efficiency.
Innovation Solution
A multi-link device with M stations sharing P single wireless channels, where only one channel is active at a time, using pre-configured or automatic switching modes to coordinate communication links, avoiding simultaneous transmit and receive, and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple communication links operate simultaneously in an MLD, then communication throughput is improved, but in-device coexistence interference occurs due to poor channel isolation
Solution Approach 1:
The patent implements dynamic channel sharing where the single wireless channel is dynamically allocated to different communication links based on transmission needs. The system switches the single channel between multiple links rather than having all links operate simultaneously, thereby maintaining high overall throughput while preventing interference through temporal separation of transmissions.
Solution Approach 2:
The patent merges multiple communication links to share a single wireless channel resource. Instead of providing dedicated channels for each link, the system combines the channel resources and uses time-division multiplexing to serve multiple links sequentially, reducing the total number of physical channels needed while avoiding coexistence interference.
2Object-affected harmful factors
If Non-STR devices avoid simultaneous transmit and receive using RTS/CTS mechanism, then coexistence interference is avoided, but communication efficiency deteriorates
Solution Approach 1:
The patent extracts the conflict resolution mechanism from the complex RTS/CTS exchange protocol and replaces it with a simpler channel sharing approach. By taking out the need for simultaneous transmit and receive capability and replacing it with sequential channel allocation, the system avoids interference without the overhead of extensive RTS/CTS signaling.
Solution Approach 2:
The patent changes the operational parameter from supporting simultaneous transmit and receive (STR) to using a single shared channel. This parameter change fundamentally alters how the device manages multiple links, transitioning from parallel operation with conflict resolution to sequential operation with inherent conflict avoidance, thereby improving efficiency.
3Adaptability or versatility
If M communication links share P single wireless channels with M>P, then resource utilization is improved, but channel isolation becomes insufficient leading to interference
Solution Approach 1:
The patent implements periodic action by allocating the single wireless channel to different communication links in a time-division manner. Each link gets periodic access to the shared channel according to its transmission needs, achieving high resource utilization while maintaining channel isolation through temporal separation that prevents simultaneous transmissions.
Data Source
AI summary
Provided are a multi-link device, a communication device, and a storage medium. The device includes: M stations, where the stations are non-access point (AP) stations, each station forms a respective communication link, the M stations form M communication links, and the M communication links communicate through P single wireless channels. M is greater than P, and P is greater than or equal to 1.