Multi-Link Device Timing Alignment for EHT Error Recovery
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Solution Overview
Problem
Current wireless communication technologies face challenges in error recovery during synchronous multiple-frame transmission in extremely-high-throughput (EHT) wireless communications, particularly in IEEE 802.11be and beyond standards, due to issues like interference and timing misalignment across multiple links.
Innovation Solution
The proposed solution involves detecting failures or timeouts in frame exchange sequences and adjusting the timing of subsequent transmissions to align them across multiple links, using techniques such as adjusting inter-frame spaces and acknowledgement timeouts, to ensure synchronized and error-free transmission in wireless communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If synchronous multiple-frame transmission is performed across multiple links to increase throughput, then productivity is improved, but timing misalignment and interference occur causing errors in transmission
Solution Approach 1:
The patent implements feedback mechanisms where receiving devices send acknowledgments (ACKs) to transmitting devices to confirm successful frame reception. When ACKs are not received or errors are detected, the transmitting device retransmits the frames. This feedback loop ensures reliable transmission despite the challenges of synchronous multi-link operation, allowing the system to maintain high throughput while correcting timing misalignments and interference through iterative error correction.
Solution Approach 2:
The patent employs preliminary actions by establishing timing synchronization and alignment procedures before actual data transmission begins. The system pre-configures inter-frame spaces, sets up acknowledgment timeout thresholds, and aligns transmission timings across multiple links in advance. This preliminary preparation prevents timing misalignment and interference during active transmission, enabling both high productivity and reliable error-free communication.
2Reliability
If transmission timing is adjusted to align frames across multiple links to reduce interference, then reliability is improved, but transmission delay increases
Solution Approach 1:
The patent implements dynamic timing adjustment mechanisms where inter-frame spaces and transmission timings are not fixed but can be adaptively modified based on channel conditions, link quality, and synchronization requirements. The system dynamically balances timing alignment needs with throughput requirements, adjusting parameters in real-time to minimize delays while maintaining error recovery capability. This dynamic approach allows the system to optimize the trade-off between reliability and transmission speed rather than being constrained by static timing configurations.
Data Source
AI summary
Various examples pertaining to extremely-high-throughput (EHT) error recovery in synchronous multiple-frame transmission in wireless communications are described. A multi-link device (MLD) detects a failure related to either or both of a first frame exchange sequence on a first link or a second frame exchange sequence on a second link. In response to the detecting, the MLD adjusts a timing of either or both of a first subsequent transmission on the first link and a second subsequent transmission on the second link to align the first and second subsequent transmissions.