Automatic Request Repeat (ARQ) – Definition and Pronunciation
What is ARQ?
ARQ (Automatic Request Repeat) is the error correction process used in store-and-forward messaging by which a receiver checks for errors in received data packets and requests the sending end to re-transmit any packets which were received containing an error.
Examples of ARQ
For communication systems employing an ARQ (Automatic Repeat Request) scheme (such as used in HDLC-like protocols) this may be as high as 10-6, while most broadcast communications systems require 10-10 performance, and storage systems and optical fiber links require BERs as low as 10-15.
From “DVB-S2 Modulation Extensions and Other Advances”.
ARQ (AUTOMATIC RETRANSMISSION REQUEST) is used in two-way communication. The ARQ unit is able to ensure that every character received has the correct proportion of 4 to 3.
From “Using TELEX Over Radio: A Practical Guide for Exploitation”.
The distress signal MAYDAY. Forward error correction “FEC mode” should be used so that all stations can listen in, although “ARQ mode” may be used between two specific stations if necessary.
From “NON-DSC Terrestrial Distress Communications”.
Pronunciation of ARQ
