Automatic Repeat Request (ARQ)

^{(Representational Image | Source: Dall-E)}
 

Quick Navigation:

• Automatic Repeat Request (ARQ) Definition
• Automatic Repeat Request (ARQ) Explained Easy
• Automatic Repeat Request (ARQ) Origin
• Automatic Repeat Request (ARQ) Etymology
• Automatic Repeat Request (ARQ) Usage Trends
• Automatic Repeat Request (ARQ) Usage
• Automatic Repeat Request (ARQ) Examples in Context
• Automatic Repeat Request (ARQ) FAQ
• Automatic Repeat Request (ARQ) Related Words

Automatic Repeat Request (ARQ) Definition

Automatic Repeat Request (ARQ) is an error-control mechanism used in computer networks and data transmission. It ensures that data sent over a communication channel is correctly received by using acknowledgments and retransmissions. If an error is detected in the data packet (typically via a checksum or error-detection code), the receiver requests a resend of that data. ARQ protocols include Stop-and-Wait ARQ, Go-Back-N ARQ, and Selective Repeat ARQ. These systems help maintain the integrity of data across unreliable or noisy communication environments.

Automatic Repeat Request (ARQ) Explained Easy

Imagine sending a note to a friend, but sometimes your friend can't read parts of it because the paper got smudged. If they can’t understand a word, they ask you to send that word again. You resend it until they get it right. ARQ works the same way for computers — if part of the message is broken, the receiver asks for that part again, making sure the whole message is clear.

Automatic Repeat Request (ARQ) Origin

The concept of ARQ has its roots in early telegraph and radio communication systems, where messages needed reliable delivery over imperfect transmission lines. The formalization and standardization of ARQ protocols began with the development of digital communication systems in the mid-20th century.

Automatic Repeat Request (ARQ) Etymology

The term "automatic" refers to the system’s ability to detect errors and request retransmission without human involvement, and "repeat request" indicates the retransmission process triggered by errors.

Automatic Repeat Request (ARQ) Usage Trends

ARQ protocols have remained foundational in digital communications and have evolved alongside increasing bandwidth and reliability needs. While ARQ remains a staple in TCP/IP networks and wireless communications, newer systems often combine ARQ with forward error correction (FEC) for faster, more efficient transmissions.

Automatic Repeat Request (ARQ) Usage

• Formal/Technical Tagging:
  - Networking
  - Error Control
  - Data Transmission
  - Communication Protocols
• Typical Collocations:
  - "ARQ protocol"
  - "error detection and ARQ"
  - "stop-and-wait ARQ"
  - "packet retransmission using ARQ"
  - "selective repeat ARQ implementation"
  
  

Automatic Repeat Request (ARQ) Examples in Context

• In Wi-Fi communications, ARQ helps ensure lost packets are retransmitted for smooth browsing.
• ARQ is used in satellite communications to correct errors caused by signal interference.
• TCP uses ARQ-like mechanisms to maintain reliable data transfer between servers and clients.
  
  

Automatic Repeat Request (ARQ) FAQ

• What is Automatic Repeat Request (ARQ)?
  It’s an error-control protocol that ensures correct data transmission by requesting retransmission of corrupted packets.
• What are the types of ARQ protocols?
  The main types are Stop-and-Wait ARQ, Go-Back-N ARQ, and Selective Repeat ARQ.
• Where is ARQ used?
  It’s used in networks, satellite communications, wireless protocols, and the TCP/IP stack.
• How does ARQ detect errors?
  It uses error-detection techniques like checksums or CRC to verify data integrity.
• Is ARQ used in 5G and modern networks?
  Yes, ARQ combined with FEC is employed for reliability in modern mobile networks.
• What’s the difference between Go-Back-N ARQ and Selective Repeat ARQ?
  Go-Back-N retransmits all frames after an error; Selective Repeat retransmits only the erroneous ones.
• Can ARQ slow down transmission?
  Yes, too many retransmissions can reduce throughput, but protocol design helps mitigate this.
• Does ARQ need a lot of bandwidth?
  Not necessarily; it’s designed to balance retransmissions with efficient use of bandwidth.
• Is ARQ part of TCP?
  Yes, TCP relies on ARQ principles to ensure reliable packet delivery.
• What happens if ARQ fails continuously?
  If errors persist beyond a set limit, the connection may time out or fail.
  
  

Automatic Repeat Request (ARQ) Related Words

• Categories/Topics:
  - Networking
  - Communication Protocols
  - Error Correction
  - Wireless Communication
  
  

Did you know?
ARQ played a key role in space exploration communications. NASA’s Mars rovers rely on ARQ-like mechanisms to ensure that vital data, transmitted across millions of miles, arrives intact despite cosmic interference and weak signals.

Authors | Arjun Vishnu | @ArjunAndVishnu

 

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I am Vishnu. I like AI, Linux, Single Board Computers, and Cloud Computing. I create the web & video content, and I also write for popular websites.

My younger brother, Arjun handles image & video editing. Together, we run a YouTube Channel that's focused on reviewing gadgets and explaining technology.