Transmission Packet Structure for Uncompressed AV Data
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Solution Overview
Problem
Current wireless communication technologies, such as IEEE 802.11 series, lack effective error correction and retransmission schemes tailored to the importance of bits in transmitting large amounts of uncompressed AV data, particularly in high-bandwidth millimeter wave networks, leading to inefficiencies in error detection and protection.
Innovation Solution
A transmission packet structure is developed with a payload error-correction coded at a predetermined rate, classified by bit importance, including a MAC header for medium access control and a PHY header with coding rate information, to prioritize error protection for high-importance bits, and a transmitter and receiver design to implement this structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional error correction schemes with the same coding rate are applied to all bits in uncompressed AV data transmission, then the transmission system is simple to implement, but high-importance bits are not adequately protected leading to poor transmission reliability
Solution Approach 1:
The patent applies different coding rates to different groups of bits based on their importance. Specifically, first groups of bits (higher importance) are encoded with a first coding rate, while second groups of bits (lower importance) are encoded with a second coding rate. This local differentiation of error protection quality resolves the contradiction by providing enhanced protection where needed without uniformly increasing system complexity.
Solution Approach 2:
The patent segments the uncompressed AV data bits into multiple groups based on their importance levels. By dividing the bit stream into first groups and second groups with different coding requirements, the system can apply tailored error correction strategies to each segment, improving overall reliability without requiring complete redesign of the entire transmission system.
2Productivity
If all bits in uncompressed AV data are protected with the same error correction level, then the error correction scheme is easy to implement, but transmission efficiency is reduced due to unnecessary protection of low-importance bits
Solution Approach 1:
The patent implements local quality differentiation by applying stronger error correction (lower coding rate) only to high-importance bit groups while using weaker correction (higher coding rate) for low-importance groups. This resolves the contradiction by optimizing resource allocation - providing enhanced protection only where necessary rather than uniformly across all bits, thereby improving transmission efficiency while managing complexity.
Solution Approach 2:
The patent changes the coding rate parameter based on bit importance. By dynamically adjusting the coding rate parameter - using a first coding rate for first groups and a second coding rate for second groups - the system optimizes the balance between protection level and transmission efficiency, avoiding unnecessary overhead for less critical data.
3Reliability
If high coding rate is used for all bits to ensure error protection, then transmission reliability improves, but data transmission rate decreases due to reduced effective bandwidth
Solution Approach 1:
The patent applies high error protection (lower coding rate) locally only to high-importance bit groups where reliability is critical, while using lower protection (higher coding rate) for low-importance groups. This resolves the contradiction by concentrating protection resources where they provide maximum value, maintaining high transmission rates for less critical data while ensuring reliability for important data.
Solution Approach 2:
The patent applies excessive error protection (lower coding rate) only partially to the most important bit groups rather than to all bits. This selective application of enhanced protection resolves the contradiction by providing more than enough protection for critical data while avoiding the transmission rate penalty for less critical data.
Data Source
AI summary
A transmission packet structure for transmitting uncompressed AV data is provided. The transmission packet structure includes a payload including multiple TDUs error-correction coded at a predetermined coding rate, wherein the payload is classified according to importance of bits constituting the uncompressed AV data; a MAC header added to the payload, wherein information for medium access control is recorded in the MAC header; and a PHY header comprising information about the coding rate, wherein the PHY header is added to the MAC header.