= Hybrid automatic repeat request
{wiki=Hybrid_automatic_repeat_request}
Hybrid Automatic Repeat reQuest (HARQ) is a protocol used in data communication systems to ensure reliable data transmission over noisy channels. It combines elements of Automatic Repeat reQuest (ARQ) and Forward Error Correction (FEC) to improve the efficiency and reliability of data transmission. \#\#\# Key Features of HARQ: 1. **Error Detection and Correction**: HARQ uses FEC codes to allow the receiver to correct certain types of errors that occur during transmission without needing to retransmit the data.
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