Wi-Fi TXOP Acknowledgment Timing for Low-Latency Downlink
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Solution Overview
Problem
The existing Wi-Fi protocol (Wi-Fi 8) fails to timely transmit downlink low-latency traffic due to the AP's inability to utilize the transmit opportunity (TXOP) for higher priority traffic, leading to increased transmission latency.
Innovation Solution
Implementing a communication method that includes sending acknowledgment frames under specific conditions, such as meeting thresholds for data units received, and allowing preemption and aggregated transmission to reduce latency and resource overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the AP and STA occupy a TXOP by exchanging RTS frame and CTS frame, then the data transmission from AP to STA is allowed, but the downlink low-latency traffic cannot be transmitted timely
Solution Approach 1:
The patent introduces dynamic TXOP adjustment mechanisms where the AP can extend or modify the TXOP duration based on real-time traffic conditions. When downlink low-latency traffic is detected, the AP dynamically extends the TXOP to accommodate this traffic, allowing flexible adaptation to varying network conditions and priority requirements.
Solution Approach 2:
The patent modifies key protocol parameters including TXOP duration, acknowledgment timing thresholds, and data unit transmission parameters. By changing these parameters dynamically, the system can prioritize low-latency traffic while maintaining overall transmission reliability and efficiency.
2Duration of action of moving object
If the AP waits for TXOP to end before transmitting low-latency traffic, then the current transmission is completed, but the transmission latency of low-latency traffic is increased
Solution Approach 1:
The patent implements preliminary actions by setting up acknowledgment frame transmission thresholds and low-latency traffic identification mechanisms before the TXOP ends. This allows the AP to prepare and schedule low-latency traffic transmission in advance, reducing waiting time and improving transmission efficiency.
Solution Approach 2:
The system dynamically adjusts TXOP duration based on real-time detection of low-latency traffic. When such traffic is detected, the TXOP is extended to accommodate the urgent transmission needs, allowing the AP to transmit low-latency traffic without waiting for the original TXOP to end.
3Ease of operation
If the AP contends for channel after TXOP ends to transmit low-latency traffic, then channel access is obtained, but the transmission latency is increased
Solution Approach 1:
The patent sets up preliminary mechanisms including threshold-based acknowledgment frame transmission rules and low-latency traffic prioritization. These preliminary configurations enable the AP to quickly identify and transmit low-latency traffic without needing to contend for the channel after TXOP ends, significantly reducing transmission latency.
Data Source
AI summary
A communication method includes receiving a plurality of data units, and when a first condition is met, sending an acknowledgment frame to acknowledge the received plurality of data units. The first condition includes at least one of a quantity of physical protocol layer data units (PPDU) or medium access control service data units (MSDUs) received in a currently occupied transmit opportunity is greater than or equal to a first threshold.