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Data transmission method, device and system

A data transmission method and data technology, applied in the field of communication, can solve problems such as low data transmission rate and insufficient competitiveness in preempting bandwidth, achieve high bandwidth effective utilization, ensure bandwidth preemption, and improve competitiveness

Active Publication Date: 2017-09-15
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the existing data transmission method based on RTT to adjust the sending rate is not competitive enough to seize the bandwidth in the case of bandwidth competition, resulting in a low data transmission rate

Method used

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  • Data transmission method, device and system
  • Data transmission method, device and system
  • Data transmission method, device and system

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Embodiment

[0083] to combine figure 2 As shown in the schematic diagram of the change process of the transmission rate with time, the data transmission method provided by the embodiment of the present invention includes: the data transmission end sends data to the data reception end at the initial transmission rate, and periodically determines the parameters used to evaluate the transmission link , and adjust the sending rate according to the current parameter value. As these parameters are periodically updated, the sending rate is also periodically adjusted accordingly.

[0084] Parameters used to evaluate transmission links include maximum receive rate, packet loss rate, and RTT. Wherein, the maximum receiving rate refers to the maximum value of the receiving rates determined on the premise that the packet loss rate does not exceed the upper limit of the packet loss rate. For example, the receiving rate is periodically measured, and the maximum receiving rate is updated. Optionally...

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Abstract

The embodiment of the invention provides a data transmission method, device and system, relates to the field of communication, and can improve the bandwidth pre-empting competitive force of a sending end, and increase the data transmission rate. The specific scheme is as follows: a data sending end sends data to a data receiving end at initial sending rate; furthermore, the sending rate is adjusted according to the maximum receiving rate, the packet loss probability and the round trip time RTT; and the process specifically comprises the steps of: increasing the sending rate step by step till a congestion event occurs for the first time; adjusting the sending rate to the lower limit of the sending rate; when the sending rate is in the first interval, adjusting the sending rate according to the queuing ratio, and furthermore, when the congestion event occurs, adjusting the sending rate to the second interval; and, when the sending rate is in the second interval, increasing the sending rate step by step, and furthermore, when the congestion event occurs, decreasing the sending rate according to a pre-set rule. The data transmission method, device and system provided by the invention are used for data transmission.

Description

technical field [0001] The present invention relates to the communication field, in particular to a data transmission method, device and system. Background technique [0002] In the connection-oriented transmission protocol, the full English name of the round-trip time is usually used: Round TripTime, English abbreviation: RTT) to reflect the smoothness of the transmission link between the data sending end and the receiving end. Among them, RTT refers to the time delay experienced from the time when the data sending end sends a data packet to when the data sending end receives an acknowledgment from the data receiving end. [0003] Taking Transmission Control Protocol (English full name: Transmission Control Protocol, English abbreviation: TCP) as an example, the data sending end sends a data packet to the data receiving end, and the data receiving end sends a confirmation message to the data sending end after receiving the data packet. The data sender sends a data packet, ...

Claims

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Application Information

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IPC IPC(8): H04L12/801H04L12/813H04L12/823H04L47/20H04L47/32
CPCH04L47/11H04L47/20H04L47/32
Inventor 魏巍
Owner HUAWEI TECH CO LTD
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