Wireless AV Data Transmission Protocol for HD Video
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Solution Overview
Problem
Existing wireless audio/video (AV) systems face inefficiencies in data transmission due to the direct application of standards like IEEE 802.11ad or ay, which are designed for multiple access and not optimized for 1:1 communication, leading to challenges in transmitting high-definition and ultra-high-definition image data effectively.
Innovation Solution
A scheduling method and data transmission protocol for wireless AV systems that includes a communication unit to manage forward and reverse data frames, prioritize transmissions based on reception success and frame priorities, and delay or retransmit data within valid transmission times, even when reverse direction grants are activated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If IEEE 802.11ad or ay standard is directly applied to wireless AV system, then multiple device access is supported, but transmission efficiency for 1:1 communication deteriorates
Solution Approach 1:
The patent extracts the essential 1:1 communication requirements from the multi-access IEEE 802.11ad/ay standard, creating a simplified wireless AV protocol that removes unnecessary multi-device coordination mechanisms while retaining core transmission capabilities, thereby optimizing for dedicated point-to-point audio/video streaming
Solution Approach 2:
The patent applies local quality by implementing communication protocols and scheduling mechanisms specifically tailored for audio/video data characteristics, such as prioritizing real-time forward data frames over reverse acknowledgments, and optimizing transmission parameters for continuous media streams rather than general data traffic
2Productivity
If reverse data frame is transmitted when forward data frame reception fails, then reverse transmission utilization is improved, but forward data retransmission reliability deteriorates
Solution Approach 1:
The patent implements dynamic control of the more data field based on real-time reception status and frame priority comparisons. The system adapts its behavior by setting the more data field to 0 or 1 according to whether forward frame retransmission is needed and whether reverse frames have higher priority, optimizing the balance between reverse transmission utilization and forward retransmission reliability
Solution Approach 2:
The patent uses feedback mechanisms where the receiving device monitors forward data frame reception success and communicates this status back to the transmitting device through block ACK frames and the more data field, enabling the transmitter to adjust its retransmission strategy and the receiver to appropriately manage reverse data frame transmission timing
3Productivity
If more data field is always set to indicate reverse data frame presence, then reverse data transmission is maximized, but forward data retransmission timing is delayed
Solution Approach 1:
The patent implements dynamic control of the more data field based on real-time reception status and frame priority comparisons. The system adapts its behavior by setting the more data field to 0 or 1 according to whether forward frame retransmission is needed and whether reverse frames have higher priority, optimizing the balance between reverse transmission utilization and forward retransmission reliability
Data Source
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AI summary
The present invention relates to a device for transmitting data in a wireless AV system, and a device for receiving data in a wireless AV system. The present specification discloses a device comprising: a communication unit configured to receive, from an initiator, a forward direction data frame and reverse direction grant information, instructing that reverse direction transmission be allowed, within a transmission opportunity acquired by the initiator, generate and transmit to the initiator, a block ACK frame pertaining to the forward direction data frame, and buffer a reverse direction data frame to be transmitted to the initiator; and a processor connected to the communication unit and configured to acquire AV data from the forward direction data frame. When a reverse direction grant is activated in a wireless AV system that operates a reverse direction grant protocol, the present invention has the effect of enabling retransmission of the forward direction data frame within a valid transmission time even when transmission of the forward direction data frame fails, and also being able to achieve transmission of the reverse direction data frame.