Data Multiplexing Layout for Smooth BER Transitions
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Solution Overview
Problem
Conventional multiplexing methods for unequal error protection (UEP) in data switching suffer from excessive instant changes in bit error rates (BERs) between adjacent super frames, leading to unexpected errors and poor transmission efficiency, as well as wastage of bandwidth due to the hard switching method and addition of padded bit codes.
Innovation Solution
The proposed method sorts frames within odd and even super frames differently based on their required BERs, using a soft bit puncturing unit to encode and puncture data, avoiding excessive concentration of punctured bits and unnecessary bandwidth waste by not requiring padded bit codes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frames are sorted by required BER decreasingly or increasingly within each super frame, then unequal error protection is achieved, but excessive instant changes of BER occur between adjacent super frames causing unexpected errors
Solution Approach 1:
The patent applies periodic action by alternating the sorting order of frames between odd and even super frames. Odd super frames sort frames by required BER in one direction (e.g., decreasingly), while even super frames sort in the opposite direction (e.g., increasingly). This periodic alternation prevents excessive instant changes in BER between adjacent super frames, maintaining system stability while achieving unequal error protection.
2Reliability
If padded bit codes are added to meet input bit length requirements, then hard switching method errors are avoided, but transmission rate and throughput rate decrease
Solution Approach 1:
The patent changes the parameter of bit length requirements by implementing a soft switching method that can handle variable input bit lengths without requiring padded bit codes. This allows the system to adapt to different frame sizes dynamically, avoiding the bandwidth waste associated with padding while maintaining reliable operation.
3Reliability
If a same error correction code with better error correction ability is applied, then lower BER is achieved, but transmission rate decreases significantly
Solution Approach 1:
The patent applies local quality by implementing unequal error protection where different error correction strengths are applied to different frames based on their specific requirements. Frames with higher reliability requirements receive stronger error correction, while frames with lower requirements receive weaker correction, optimizing the balance between reliability and transmission rate for each local component.
4Productivity
If a same error correction code with lower error correction ability is applied, then transmission rate is maintained, but data requiring lower BER cannot be satisfied
Solution Approach 1:
The patent implements local quality by providing differentiated error correction capabilities to different frames. Each frame receives error correction tailored to its specific BER requirements, ensuring that frames requiring lower BER receive adequate protection while maintaining overall high transmission rate through efficient resource allocation.
Data Source
AI summary
A multiplexing method for data switching is disclosed. In the method, a continuous data is received, and the continuous data includes a plurality of super frames, and each super frame includes a plurality of frames. These super frames are divided into a set of even super frames and a set of odd super frames. The frames included in the set of odd super frames are sorted by corresponding required bit error rate of each frame decreasingly or increasingly. The frames included in the set of even super frames are sorted by the required bit error rate of each frame increasingly or decreasingly. An encoder is used to encode these sorted super frames.