ARQ


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ARQ

(computer science)

ARQ

ARQ

(Automatic Repeat reQuest) A set of protocols for handling communications errors in which the receiving station requests retransmission if an error occurs. The ARQ is a layer 2 data link protocol (see OSI model).

Stop-and-Wait ARQ
The sender waits for an acknowledgment (ACK) before sending the next frame. If the sender does not receive an ACK within a certain amount of time, or if it receives a not-acknowledged (NAK) message, the frame is retransmitted.

Go-Back-N ARQ
Multiple frames are sent, and the sender waits for all frames to be acknowledged. If there is a NAK for any frame, or if there is no ACK for all the frames, the entire set is retransmitted.

Selective Repeat ARQ
Similar to Go-Back-N ARQ, except that only the frame that did not receive a NAK is retransmitted.
References in periodicals archive ?
Together with the identification of practical steps to support countries' capacities to report on their drug situation, the meeting will help UNODC to finalise a solid proposal on a new ARQ and a list of priorities for capacity building to present to the Commission on Narcotic Drugs, CND, for its consideration.
The Gearbox, DOZER ARQ, and Brutus share a very useful feature: Remote configuration and troubleshooting.
With the C[O.sub.2] and [O.sub.2] results, we calculated the ARQ (mol [mol.sup.-1]) according to Wolinska et al.
"The ARQ support that's integrated into the Kyrion encoder/decoder will also enable seamless contribution over the Internet.
In other side, it should be mentioned that the combination between Automatic Repeat reQuest (ARQ) and MCS was at first the subject of the contribution in [5].
This newest architectural jewel is designed by ARQ, a world-renowned design agency.
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ARQ (Automatic Repeat Request) mechanism has been applied at the common IW sublayer to eliminate packet losses for hard handover scenario in [33], to reducing handover latency by simple bi-casting packets over two RATs in [6].
Tiempos obtenidos (segundos) con las implementaciones Secuencial (Sec), OpenMP y CUDA para cada una de las Arquitecturas (Arq) de pruebas con ficheros de distintos tamanos 50 MB 150 MB 300 MB Arq 1 Sec 2.50 7.47 14.96 Arq 2 Sec 2.65 7.94 15.88 Arq 3 Sec 2.29 6.88 13.74 Arq 1 OpenMP 1.25 3.76 7.50 Arq 2 OpenMP 0.66 1.99 3.99 Arq 3 OpenMP 0.45 1.33 2.65 Arq 1 CUDA 0.08 0.24 0.48 Arq 2 CUDA 0.28 0.83 1.47 Arq 3 CUDA 0.07 0.22 0.42 450 MB 600 MB 750 MB Arq 1 Sec 22.43 29.85 37.39 Arq 2 Sec 23.83 31.78 39.70 Arq 3 Sec 20.66 27.44 34.32 Arq 1 OpenMP 11.23 14.96 18.72 Arq 2 OpenMP 6.00 7.69 9.97 Arq 3 OpenMP 4.11 5.31 6.66 Arq 1 CUDA 0.73 0.93 1.09 Arq 2 CUDA 1.62 1.76 1.95 Arq 3 CUDA 0.65 0.84 0.94
(14) The panels consist of synthetic, nuclease-resistant Armored RNA Quant (ARQ) e13a2 or e14a2 fusion transcripts serially diluted in a background of ARQ ABL1 and BCR transcripts with lot-specific IS % ratios anchored to the consensus reference values of the WHO primary standards.