Arq

Requires complex buffering and ordering at the receiver. 4. Performance Considerations

is a fundamental error-control mechanism used in telecommunications and data link layers to ensure reliable transmission over unreliable communication links. Unlike Forward Error Correction (FEC) , which allows the receiver to correct errors, ARQ relies on the receiver identifying errors and requesting retransmission of data from the sender. This paper covers the primary types of ARQ protocols, their mechanisms, and performance tradeoffs. 2. Fundamental Mechanisms ARQ protocols operate based on two main principles: Requires complex buffering and ordering at the receiver

Automatic Repeat Request (ARQ): Reliable Data Transmission 1. Introduction Requires complex buffering and ordering at the receiver

The sender can transmit multiple frames (within a window size Requires complex buffering and ordering at the receiver