Stop-and-Wait ARQ Mechanism Implementation

This article presents a MATLAB implementation of the Stop-and-Wait ARQ (Automatic Repeat Request) mechanism. The program demonstrates the core Stop-and-Wait protocol where the sender transmits a data frame and waits for an acknowledgment (ACK) from the receiver before sending the next frame. The implementation includes key components such as frame sequencing, acknowledgment validation, timeout handling using MATLAB's timer functions, and retransmission logic for lost frames. The code utilizes MATLAB's socket programming capabilities for network communication, with separate modules for sender and receiver operations. Error detection mechanisms like checksum verification ensure data integrity during transmission. The Stop-and-Wait ARQ protocol is widely used in data communication systems to ensure reliable data transfer with minimal communication errors, making it suitable for both educational purposes and practical network simulations.