Multi-Link Device Backoff Alignment for Simultaneous Transmission
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Solution Overview
Problem
Multi-link devices (MLDs) face challenges in simultaneous transmission and reception on different links due to high leakage, which prevents them from utilizing enhanced distributed channel access (EDCA) effectively, leading to inefficient channel access and throughput issues.
Innovation Solution
Aligning backoff counters of STAs within an MLD to ensure simultaneous transmission on multiple links by adjusting backoff counts before they expire, allowing for coordinated access to wireless communication channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MLDs use simultaneous transmission and reception on different links, then network throughput is improved, but channel access efficiency deteriorates due to high leakage preventing effective EDCA utilization
Solution Approach 1:
The patent applies preliminary action by aligning backoff counters before they expire, ensuring that STAs within an MLD are prepared to transmit simultaneously on multiple links. This pre-coordination of backoff timing allows the MLD to effectively utilize EDCA for simultaneous multi-link transmission, resolving the channel access efficiency problem while maintaining high throughput capability
2Adaptability or versatility
If backoff counters are aligned to ensure simultaneous transmission, then multi-link transmission capability is improved, but channel access fairness for other STAs may be compromised
Solution Approach 1:
The patent applies local quality by implementing backoff alignment specifically within STAs of the same MLD, allowing each MLD to coordinate its own multi-link transmissions while other STAs in the network maintain independent channel access. This localized coordination enables simultaneous multi-link transmission capability while preserving overall channel access fairness through the standard EDCA mechanism for other devices
3Productivity
If MLDs coordinate channel access across multiple links, then transmission efficiency is improved, but system complexity increases
Solution Approach 1:
The patent applies self-service by enabling STAs within an MLD to automatically align their own backoff counters and coordinate transmission timing without requiring complex external coordination mechanisms. Each STA monitors its own backoff counter and adjusts timing to match other STAs in the same MLD, achieving efficient multi-link transmission through decentralized self-coordination that minimizes system complexity
Data Source
AI summary
This disclosure describes systems, methods, and devices related to channel access for multi-link devices (MLDs). A MLD may identify a first backoff count associated with a first enhanced distributed channel access function (EDCAF) for a first communication link used by the MLD; identify a second backoff count associated with a second EDCAF for a second communication link used by the MLD, the first backoff count less than the second backoff count; determine a time period after that the first backoff count reaches zero and during which to refrain from transmitting using the first communication link, the time period based on the second backoff count; determine that the first communication link transitioned from an idle state to a busy state during the time period; and generate a third backoff count associated with the first EDCAF based on the first communication link transitioning to the busy state during the time period.