Punctured Data Message Transmission for Wireless Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communications networks, noise degrades receiver performance, leading to failed decoding of data messages, and existing solutions require acknowledgment from receivers to retransmit data, increasing the number of transmissions.
Innovation Solution
A transmission method that sends punctured data messages with alternating code rates within a flooding routine, allowing receivers to reassemble encoded data without acknowledging decoding success, reducing the need for retransmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If acknowledgment-based retransmission is used, then decoding reliability is improved, but the number of transmissions increases
Solution Approach 1:
The encoded data message is divided into multiple punctured data messages with different code rates, each transmitted in separate time slots. This segmentation allows the receiver to combine information from multiple transmissions without requiring explicit acknowledgments, thereby reducing the number of retransmissions while maintaining decoding reliability.
Solution Approach 2:
The transmitter pre-determines multiple puncturing patterns with different code rates before transmission. By preparing multiple versions of the encoded message in advance, the system can switch between different code rates based on channel conditions without waiting for receiver feedback, thus avoiding the need for acknowledgment-based retransmission.
2Reliability
If multiple punctured data messages with different code rates are transmitted, then decoding capability in noisy environments is improved, but the complexity of the transmission system increases
Solution Approach 1:
The system varies the code rate parameter by applying different puncturing patterns to the encoded data message. By changing the code rate parameter across multiple transmissions, the system adapts to noisy channel conditions without requiring complex error correction mechanisms or additional processing at the receiver end.
Solution Approach 2:
The transmitter uses periodic puncturing patterns with different code rates in alternating time slots. This periodic variation in code rate provides diversity in the transmitted signals, enabling the receiver to combine information effectively while keeping the transmission system relatively simple.
3Productivity
If data messages are transmitted without acknowledgment, then the number of transmissions is reduced, but decoding reliability may deteriorate
Solution Approach 1:
The system transmits multiple copies of the encoded data message with different puncturing patterns and code rates. By sending multiple copies rather than relying for single transmission with acknowledgment, the receiver can combine information from these copies to achieve reliable decoding without explicit feedback from the transmitter.
Solution Approach 2:
The receiver merges or combines information from multiple punctured data messages with different code rates to reconstruct the original encoded message. This combining process enables reliable decoding without requiring acknowledgment-based retransmission, as the receiver aggregates information from all transmissions regardless of their individual success.
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2
AI summary
A transmission device and method for repeatedly transmitting punctured data messages is disclosed. The transmission device is configured to puncture an encoded data message over a plurality of consecutive time slots to provide punctured data messages. The punctured data messages include a first punctured data message and a second punctured data message that are alternately transmitted during the consecutive time slots, the first punctured data message arising from puncturing the encoded data message with a first puncture indices series and the second punctured data message arising from the puncturing of the encoded data message with a second puncture indices series that is complementary to the first puncture indices series. A reception device and method for reassembling the encoded data message based on the punctured data messages is also disclosed.