Arq Online

) before needing an ACK. If a frame is lost, the receiver discards all subsequent frames, and the sender must retransmit all frames starting from the lost one. Better utilization than Stop-and-Wait. Cons: High retransmission overhead in poor channels. 3.3. Selective Repeat ARQ (SR)

Low throughput on links with high propagation delay, as the channel remains idle while waiting for ACKs. 3.2. Go-Back-N ARQ (GBN) ) before needing an ACK

Only the specific lost or corrupted frame is retransmitted, rather than the entire window. Pros: Highly efficient utilization of bandwidth. the receiver discards all subsequent frames

g., protocol efficiency calculations, equations) or a ? Do youg., mobile networks, satellite)? protocol efficiency calculations

An Adaptive Type-I1 hybrid ARQ/FEC Protocol - Clemson University

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