Wireless Communication Apparatus Frame Boundary Alignment
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Solution Overview
Problem
In wireless communication systems employing Hybrid Automatic Repeat Request (HARQ), the mismatch between frame boundaries of information bits and code words in transmission and retransmission frames hinders effective error correction, as the parity bits are different, making it difficult to synthesize and demonstrate the full error correction function.
Innovation Solution
A wireless communication apparatus that divides data into bit strings, adds padding bits to match the frame boundaries, and generates encoded blocks with error correction codes, ensuring that both transmission and retransmission packets have aligned boundaries for accurate likelihood synthesis and improved signal reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frame aggregation is used to transmit multiple encoded data frames, then bandwidth utilization efficiency is improved, but frame boundaries do not align with code word boundaries, making it difficult to synthesize parity portions and demonstrating full error correction function
Solution Approach 1:
The transmitted data is segmented into multiple code blocks, each independently encoded with its own parity bits. This segmentation allows the receiver to perform likelihood synthesis on corresponding code blocks from transmission and retransmission frames, resolving the boundary alignment issue while maintaining high bandwidth utilization through frame aggregation
Solution Approach 2:
The patent changes the encoding parameter by using separate encoding for each code block rather than encoding the entire aggregated frame as one unit. This parameter change ensures that code word boundaries align with frame boundaries, enabling effective error correction while maintaining aggregation benefits
2Measurement precision
If padding bits are added to align frame boundaries with code word boundaries, then likelihood synthesis accuracy is improved, but data transmission overhead increases
Solution Approach 1:
Instead of adding padding bits to every frame, the patent applies partial action by only adding padding bits when necessary to align specific code block boundaries. This selective approach maintains likelihood synthesis accuracy while minimizing unnecessary overhead
Solution Approach 2:
The patent applies local quality by making the padding bit addition decision specific to each code block based on its boundary alignment requirements, rather than uniformly padding all frames. This localized approach optimizes the balance between alignment accuracy and transmission efficiency
Data Source
AI summary
According to one embodiment, a wireless communication apparatus includes controlling circuitry and transmitter circuitry. The controlling circuitry is configured to divide data into bit strings by a unit of a first number of bits; add at least one padding bit to one of the bit strings according to a difference between a number of bits of the one of the bit strings and the first number of bits, when the one of the bit strings has a number of bits less than the first number of bits; add error correction codes to the bit strings to generate encoded blocks, wherein each of the error correction codes has a second number of bits; combine the encoded blocks to generate encoded frames; and aggregate the encoded frames to generate a transmission packet. The transmitter circuitry is configured to transmit the transmission packet.