automatic repeat request system

简明释义

自动请求重发方式

英英释义

例句

1.The automatic repeat request system is crucial for error correction in wireless communication.

在无线通信中，自动重传请求系统对于错误修正至关重要。

2.In video streaming, an automatic repeat request system helps maintain smooth playback by recovering lost data.

在视频流媒体中，自动重传请求系统通过恢复丢失的数据来帮助保持流畅播放。

3.Many modern protocols use an automatic repeat request system to enhance reliability.

许多现代协议使用自动重传请求系统来增强可靠性。

4.The automatic repeat request system ensures that lost packets are retransmitted in a network.

这个自动重传请求系统确保在网络中丢失的数据包被重新传输。

5.During a file transfer, the automatic repeat request system automatically requests missing parts of the file.

在文件传输过程中，自动重传请求系统会自动请求缺失的文件部分。

作文

In today's digital age, communication is more important than ever. One of the key components that facilitates effective communication in data transmission is the concept of an automatic repeat request system. This system plays a crucial role in ensuring that data sent over networks is received accurately and completely. Understanding how this system works can help us appreciate the complexities of modern communication technologies.An automatic repeat request system (ARQ) is a protocol used in data transmission that enables the automatic re-sending of data packets when errors are detected. When data is transmitted over a network, it is possible for some packets to be lost or corrupted due to various reasons such as interference, congestion, or hardware malfunctions. The ARQ system addresses this issue by incorporating error detection and correction mechanisms.The process begins when a sender transmits a packet of data to a receiver. Upon receiving the packet, the receiver checks for errors using techniques such as checksums or cyclic redundancy checks (CRC). If the data is received correctly, the receiver sends an acknowledgment (ACK) back to the sender, confirming that the packet was received without any issues.However, if the receiver detects an error in the data packet, it will not send an acknowledgment. Instead, it will send a negative acknowledgment (NACK) indicating that the packet was received incorrectly. Upon receiving this NACK, the sender will automatically retransmit the erroneous packet. This process continues until the receiver successfully receives the correct data.This method of automatic retransmission ensures that the integrity of data is maintained throughout the transmission process. The automatic repeat request system is particularly useful in environments where data integrity is critical, such as in financial transactions, medical data transfers, and real-time communications.Moreover, there are different types of ARQ protocols, including Stop-and-Wait ARQ, Go-Back-N ARQ, and Selective Repeat ARQ. Each of these protocols has its own advantages and is suited for different types of network conditions. For instance, Stop-and-Wait ARQ is simple and easy to implement but can be inefficient in high-latency networks. On the other hand, Go-Back-N ARQ allows multiple packets to be sent before requiring an acknowledgment, which can improve efficiency but complicates error recovery.In conclusion, the automatic repeat request system is a vital component of reliable data communication in modern networks. By enabling the automatic retransmission of lost or corrupted packets, ARQ protocols enhance the accuracy and reliability of data transmission. As we continue to rely on digital communication for various aspects of our lives, understanding systems like ARQ becomes essential for appreciating the technology that underpins our connectivity. The next time you send an email or stream a video, remember that behind the scenes, an automatic repeat request system may be working diligently to ensure your data reaches its destination intact.

在当今数字时代，沟通比以往任何时候都更加重要。促进数据传输中有效沟通的关键组成部分之一是“自动重发请求系统”的概念。该系统在确保通过网络发送的数据准确完整地接收方面发挥着至关重要的作用。理解这个系统的工作原理可以帮助我们欣赏现代通信技术的复杂性。“自动重发请求系统”（ARQ）是一种用于数据传输的协议，能够在检测到错误时自动重新发送数据包。当数据通过网络传输时，由于干扰、拥塞或硬件故障等各种原因，某些数据包可能会丢失或损坏。ARQ系统通过结合错误检测和纠正机制来解决此问题。该过程开始于发送方将数据包传输给接收方。接收方在接收到数据包后，通过校验和或循环冗余校验（CRC）等技术检查数据是否存在错误。如果数据正确接收，接收方将向发送方发送确认（ACK），确认数据包没有问题。然而，如果接收方检测到数据包中的错误，它将不会发送确认。相反，它会发送一个否定确认（NACK），表明数据包接收不正确。在收到此NACK后，发送方将自动重新传输错误的数据包。这个过程会持续进行，直到接收方成功接收到正确的数据。这种自动重传的方法确保了数据在传输过程中的完整性。“自动重发请求系统”在数据完整性至关重要的环境中尤其有用，例如金融交易、医疗数据传输和实时通信。此外，ARQ协议有不同类型，包括停止等待ARQ、回退N ARQ和选择性重传ARQ。每种协议都有其优点，并适合不同类型的网络条件。例如，停止等待ARQ简单易用，但在高延迟网络中可能效率低下。另一方面，回退N ARQ允许在要求确认之前发送多个数据包，这可以提高效率，但使错误恢复变得复杂。总之，“自动重发请求系统”是现代网络中可靠数据通信的重要组成部分。通过启用丢失或损坏数据包的自动重传，ARQ协议增强了数据传输的准确性和可靠性。随着我们继续依赖数字通信来处理生活的各个方面，理解像ARQ这样的系统对于欣赏支撑我们连接的技术变得至关重要。下次您发送电子邮件或观看视频时，请记住，在幕后，可能有一个“自动重发请求系统”正在努力确保您的数据完整无损地到达目的地。