Physical Layer Retransmission Control with Sequence Number and Abnormal State Field

The patent segments the retransmission control process into distinct components: sequence number assignment for packet identification, error detection mechanisms, and selective retransmission triggers. This segmentation allows the system to implement reliable retransmission control while managing complexity through modular design, where each component handles a specific aspect of the retransmission process independently.

The patent applies local quality by implementing retransmission control selectively rather than uniformly across all data packets. Error detection is performed on specific packets, and retransmission is triggered only when errors are detected or acknowledgments are not received. This selective approach ensures reliability for critical packets while minimizing resource overhead by avoiding unnecessary retransmissions of error-free data.

The patent employs preliminary action by pre-assigning sequence numbers to data packets before transmission and establishing error detection mechanisms in advance. This preparation allows the receiving end to quickly identify erroneous packets without complex real-time analysis, reducing the implementation complexity of selective retransmission while maintaining low resource overhead through precise error targeting.