Wi-Fi MAC Frame Video Transmission Efficiency
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Solution Overview
Problem
Current Wi-Fi networks face inefficiencies in video content transmission due to unnecessary retransmissions caused by limited bit errors, which consume bandwidth and increase latency, especially since video content forms a significant portion of Wi-Fi traffic.
Innovation Solution
The introduction of a video content specific MAC frame format with multiple Frame Check Sequences (FCS) and a new information element in the HE-SIG-A field to differentiate between original and video content specific MAC frames, allowing receivers to verify protocol and video content separately, reducing unnecessary retransmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional MAC frame format with single FCS is used for video content transmission, then protocol verification is simple, but retransmissions occur frequently due to inability to verify video content errors separately
Solution Approach 1:
The patent divides the traditional single FCS into multiple separate FCS fields: first FCS for protocol information verification and second FCS for video content verification. This segmentation allows independent verification of protocol and content, reducing unnecessary retransmissions while maintaining frame structure organization.
Solution Approach 2:
The patent applies different verification standards to different parts of the MAC frame by introducing video content specific parameters (VCP) that enable receivers to apply appropriate verification thresholds. Protocol information uses strict verification while video content allows for configurable error tolerance, optimizing both reliability and efficiency.
2Reliability
If retransmission is performed for any bit error in video content, then data integrity is maintained, but bandwidth is wasted and latency increases
Solution Approach 1:
The patent implements partial verification action by allowing receivers to accept video content with certain error thresholds. Instead of requiring perfect verification for all data, the system performs partial retransmission only for critical protocol errors or when video content errors exceed configurable thresholds, reducing unnecessary retransmissions while maintaining acceptable quality.
Solution Approach 2:
The patent introduces video content specific parameters (VCP) that allow dynamic adjustment of verification thresholds and error tolerance. By changing verification parameters based on content type and quality requirements, the system optimizes the balance between data integrity and transmission efficiency.
3Reliability
If multiple FCS fields are added to MAC frame for separate protocol and content verification, then retransmission probability decreases, but frame size and processing complexity increase
Solution Approach 1:
The patent segments verification into distinct phases: first FCS verification for protocol integrity and second FCS verification for content integrity. This segmented approach organizes processing complexity into manageable stages, allowing receivers to handle each verification type with appropriate algorithms and thresholds.
Solution Approach 2:
The patent performs protocol verification (first FCS) before content verification (second FCS). This preliminary action ensures that only frames with valid protocol structures proceed to content verification, filtering out obviously erroneous frames early and reducing overall processing complexity.
4Productivity
If video content specific MAC frame format is implemented, then bandwidth utilization improves, but compatibility with traditional Wi-Fi devices is reduced
Solution Approach 1:
The patent introduces video content specific parameters (VCP) as optional extensions that provide enhanced verification capabilities when supported. Traditional devices can ignore these extended parameters and process frames using standard methods, while advanced devices utilizing video content specific format can leverage the additional verification fields for improved bandwidth utilization.
Solution Approach 2:
The patent designs the MAC frame structure to serve multiple functions: it maintains compatibility with traditional frames for basic operation while incorporating video content specific fields for enhanced performance. This multi-functionality allows the same frame structure to work across different device capabilities and application requirements.
Data Source
AI summary
Provided herein are apparatus and methods for improving transmission efficiency of video content for Wireless Fidelity (Wi-Fi). An apparatus for a Wi-Fi device comprises a Radio Frequency (RF) interface and processing circuitry coupled with the RF interface. The processing circuitry is to encode a Medium Access Control (MAC) frame, to carry video content to be transmitted to one or more other Wi-Fi devices connected with the Wi-Fi device; encapsulate the MAC frame into a physical (PHY) frame, the PHY frame is to include an additional byte in a high-efficiency signal-A (HE-SIG-A) field, to indicate whether the MAC frame is encoded as an original MAC frame including one Frame Check Sequence (FCS) or a video content specific MAC frame including more than one FCSs; and transmit the PHY frame, via the RF interface, to the one or more other Wi-Fi devices.