Multi-Link Single-Radio Backoff Control for Frame Collision Avoidance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Enhanced multi-link single radio devices in wireless communication systems face challenges with initial control frame collisions, particularly in wireless local area networks, which can lead to inefficiencies and potential data transmission failures.
Innovation Solution
Wireless devices are configured to detect initial control frame failures due to cross-link collisions and adjust contention windows or modify backoff counter operations to prevent same-link collisions, thereby improving the effectiveness of contention window sizing and reducing the likelihood of simultaneous transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If enhanced multi-link single radio devices operate on multiple links simultaneously, then device capabilities and bandwidth are expanded, but initial control frame collisions increase leading to transmission failures
Solution Approach 1:
The patent applies preliminary action by detecting the occurrence of a transmit opportunity on one link before attempting transmissions on other links. The device proactively adjusts backoff counter operations based on the detected transmit opportunity timing, preventing same-link collisions before they occur. This advance detection and adjustment mechanism resolves the contradiction by maintaining multi-link operation capability while preventing control frame collisions that would compromise transmission reliability.
2Ease of operation
If devices use standard backoff counter operations on multiple links, then channel access is simplified, but simultaneous transmissions cause control frame collisions
Solution Approach 1:
The patent implements feedback by continuously monitoring transmit opportunity occurrences on one link and using this information to adjust backoff counter operations on other links. When a transmit opportunity is detected, the device provides feedback by pausing or discarding backoff counters on other links to prevent simultaneous transmissions. This feedback mechanism maintains operational simplicity while eliminating the harmful effect of control frame collisions through dynamic adjustment based on real-time channel conditions.
3Device complexity
If contention window size remains fixed, then device operation is straightforward, but transmission efficiency decreases during high collision periods
Solution Approach 1:
The patent applies dynamics by making the contention window size adaptive rather than fixed. The device dynamically adjusts the contention window based on detected transmit opportunity patterns and collision conditions. When collisions are detected or transmit opportunities are frequent, the contention window is modified to optimize transmission timing. This dynamic adjustment resolves the contradiction by improving transmission efficiency during high collision periods while maintaining straightforward operation through automated adaptation.
Data Source
Figure 1
Figure 2
Figure 3
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.