Conditional Parity Frame Transmission in Wi-Fi 8 A-MPDU

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Solution Overview

Problem

The existing method of network coded frame transmission in Wi-Fi 8 (IEEE 802.11be) always adds parity frames after data frames, even if they are received correctly, leading to unnecessary overhead and reduced throughput.

Innovation Solution

The proposed system transmits parity frames separately after data frames only if there are packet drops, and adjusts transmission strategies based on immediate acknowledgments and available TXOP time, optimizing bandwidth usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If parity frames are always added after data frames in network coded transmission, then packet loss recovery is improved, but throughput is reduced due to unnecessary overhead

Engineering Contradiction:

Improvepacket loss recoveryVSAvoidthroughput

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent applies dynamics by making the transmission of parity frames conditional rather than fixed. The system dynamically adjusts transmission behavior based on channel conditions and packet loss detection, transmitting parity frames only when necessary (when packet drops are detected) rather than always adding them, thus resolving the contradiction between reliability and throughput

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of transmission strategy from static (always transmit parity frames) to adaptive (transmit parity frames only when packet loss occurs). By monitoring packet delivery status and changing transmission parameters accordingly, the system optimizes both reliability and throughput

Inventive Principle:

Principle #35Parameter changes

2Reliability

If parity frames are transmitted separately after data frames, then packet loss recovery is improved, but transmission time is increased

Engineering Contradiction:

Improvepacket loss recoveryVSAvoidtransmission time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent implements periodic action by using acknowledgment mechanisms at specific intervals. The transmitter sends data frames and waits for acknowledgments, then periodically checks for packet loss and transmits parity frames only when needed, rather than continuously transmitting them, thus reducing unnecessary time consumption

Inventive Principle:

Principle #19Periodic action

3Productivity

If network coded transmission is used, then spectral efficiency is improved, but device complexity is increased

Engineering Contradiction:

Improvespectral efficiencyVSAvoidtransmission strategy complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent applies feedback by implementing acknowledgment mechanisms where receivers confirm successful reception of data frames. This feedback loop enables the transmitter to detect packet loss and determine when parity frames are needed, simplifying the complexity management while maintaining spectral efficiency benefits of network coding

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20240064716A1Efficient network coded frame transmission

Publication Date: 2024.02.22 INTEL CORP

AI summary

This disclosure describes systems, methods, and devices related to enhanced transmission. A device may generate an aggregated medium access control protocol data unit (A-MPDU) frame, wherein the A-MPDU is associated with transmission of n Network Coding (NC) encoded frames. The device may divide the A-MPDU frame into k data frames and (n−k) parity frames within the A-MPDU frame. The device may transmit the k data frames. The device may transmit to a station device (STA) at least one of the (n−k) parity frames separately after the data frames in response to packet drops in the k data frames.