Wireless Data Block Header With Dual Compression Schemes
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Solution Overview
Problem
In wireless networks, especially in noisy channels, the frequent retransmissions of data blocks due to decoding failures lead to a reduction in data transfer rates, as the transmitter assumes errors if an acknowledgment (ACK) is not received within a certain time interval or a NACK message is received.
Innovation Solution
Implementing a modified incremental redundancy process, where the receiver combines information from different transmissions of data blocks using different puncturing schemes, reducing the number of unknown bit values and increasing the likelihood of successful decoding, thereby reducing retransmissions and enhancing data transfer rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmitter retransmits data blocks when ACK is not received or NACK is received, then the reliability of data transmission is improved, but the data transfer rate deteriorates due to frequent retransmissions in noisy channels
Solution Approach 1:
The transmitter sends additional redundant data blocks in advance with the original data block. These redundant blocks are prepared beforehand using puncturing schemes, so when decoding fails, the receiver can combine the original and redundant blocks without requiring retransmission, thus maintaining data transfer rate while improving reliability
Solution Approach 2:
The system changes the coding parameters by applying different puncturing schemes to generate redundant data blocks with different unknown bit patterns. This parameter variation allows the receiver to combine multiple versions and reduce unknown bits, resolving the contradiction between reliability and transfer rate
2Productivity
If selective acknowledgement is used instead of ACK after each data block, then the data transfer rate is improved, but the complexity of the communication protocol increases
Solution Approach 1:
The system merges multiple data blocks into a single combined block at the receiver by combining information from the original and redundant blocks. This merging approach allows selective acknowledgement to work effectively while keeping protocol complexity manageable, as the receiver handles the combination process rather than requiring separate ACKs for each block
Data Source
AI summary
Method and system for creating a radio block header that identifies a selected data block, a first compression scheme to compress a first encoded instance of the selected data block, and a second compression scheme to compress a second encoded instance of the selected data block, wherein the second compression scheme is different from the first compression scheme and for forming a radio block that includes the radio block header, a first instance of the selected data block, and a second instance of the selected data block.