Single-Radio Multi-Link Backoff Control for Initial Frame Collisions
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Solution Overview
Problem
Enhanced multi-link single radio devices in wireless communication systems face challenges with initial control frame collisions, which can lead to inefficiencies and potential failures in wireless networking.
Innovation Solution
Wireless devices are equipped to detect initial control frame failures due to cross-link collisions and adjust contention windows or modify backoff counter operations to prevent such collisions, thereby improving the effectiveness of transmission opportunities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If enhanced multi-link single radio devices operate on multiple links simultaneously, then device capabilities and network throughput are improved, but initial control frame collision probability increases
Solution Approach 1:
The patent applies preliminary action by detecting ongoing transmit opportunities on one link before initiating transmissions on another link. The device monitors the status of first link transmissions and uses this information to control second link transmissions, preventing collisions before they occur. This advance detection and control mechanism resolves the contradiction by maintaining multi-link operation benefits while preventing control frame collisions.
2Ease of manufacture
If devices use single radio for multiple links, then implementation cost is reduced, but cross-link collision risk increases
Solution Approach 1:
The patent uses the first link transmission status as an intermediary signal to control second link transmissions. By monitoring whether a transmit opportunity is ongoing on the first link, the device indirectly controls transmissions on the second link, preventing cross-link collisions. This intermediary mechanism allows single-radio devices to operate on multiple links cost-effectively while mitigating collision risks through coordinated transmission control.
Data Source
AI summary
This disclosure relates to methods for handling and avoiding enhanced multi-link single radio in-device cross-link and same-link initial control frame collisions in a wireless local area network. Techniques for handling cross-link collisions can include determining when an enhanced multi-link single radio cross-link collision occurs for a wireless device and selecting a contention window for the wireless device based on the cross-link collision. Techniques for avoiding same-link collisions can include adjusting backoff counter operation on one enhanced multi-link single radio link based on a transmit opportunity that is occurring on another enhanced multi-link single radio link for a wireless device.