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Data transmission method and device

A technology for data transmission and retransmission request, applied in the field of data transmission, which can solve the problems of low data transmission efficiency, long recovery time, and poor recovery effect.

Pending Publication Date: 2022-05-24
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the recovery effect of these three methods is not good, and the recovery time is long, resulting in low data transmission efficiency

Method used

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  • Data transmission method and device
  • Data transmission method and device

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Embodiment Construction

[0045] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0046] It should be understood that the technical solutions of the present application can be applied to various communication systems, such as: global system of mobile communication (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (general packet radio service, GPRS), long term evolution (long term evolution, LTE) system, advanced long term evolution (advanced long erm evolution, LTE-A) system, A universal mobile telecommunication system (UMTS) or a next-generation communication system (eg, fifth-generation (5G) system) and the like. Among them, the 5G system may also be called a new generation radio access technology (new radio access technology, NR) system.

[0047] In order to facilitate the understanding of the e...

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Abstract

The invention provides a data transmission method and device, which can reduce the recovery time of a lost message, further reduce the completion time of a data transmission task and improve the data transmission efficiency. The method comprises the steps that a sending end sends tail messages, the tail messages are all messages or a part of messages in a last congestion window, a last sending period or a last bandwidth delay product (BDP) of data transmission of this time, the tail messages have first identification, and correspondingly, a receiving end receives the tail messages; after the receiving end receives any one of the tail messages, a first timer is started; if the first timer is overtime and message missing exists in the tail messages received by the receiving end, the receiving end sends a first retransmission request, and correspondingly, the sending end receives the first retransmission request; and the sending end sends the lost message in the tail message based on the first retransmission request. Correspondingly, the receiving end receives the lost message.

Description

technical field [0001] The present application relates to the field of communications, and more particularly, to a method and apparatus for data transmission. Background technique [0002] With the development of wireless transmission technology, people have higher and higher requirements for communication rate and communication delay. However, in the process of data transmission, there is usually a problem of data loss, which leads to a long data transmission delay and reduces data transmission efficiency. Therefore, recovery of lost packets during data transmission is of great significance for data transmission. [0003] In the prior art, there are three ways to recover lost messages during data transmission: one is to recover lost messages by using fast recovery (FR) and retransmission timeout (RTO) methods; One is to recover lost packets by using a probe timeout (PTO) method; the other is to recover lost packets by a data protection mechanism based on network coding. ...

Claims

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Application Information

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IPC IPC(8): H04L1/18
CPCH04L1/188
Inventor 徐安民于德雷王闯王万红
Owner HUAWEI TECH CO LTD