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A data transmission method, device and system

A data transmission method and a technology of a data transmission device, which are applied in the communication field and can solve problems such as wasting power consumption of intermediate nodes

Active Publication Date: 2021-01-15
CHINA MOBILE COMM LTD RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The embodiment of the present application provides a data transmission method, device and system to solve the problem of wasting power consumption of intermediate nodes in the TCP transmission mechanism in the prior art

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  • A data transmission method, device and system
  • A data transmission method, device and system
  • A data transmission method, device and system

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Embodiment 2

[0052] Such as Figure 5 Shown is a schematic diagram of data transmission in the prior art. Assume that when the sender initially accesses the network, it sends 4 data packets, and the packet interval of these 4 data packets is small, as shown in ①, but because the link rate between the intermediate nodes (routers) 1 and 2 is 10Mbps , compared to the transmission rate of other links 10Mbps is small, so, after passing through the intermediate node 2, the packet interval between the 4 data packets sent by the sending end begins to expand, as shown in ③, and the receiving end is based on the received The time of the data packet confirms the data packet. In this way, the packet interval of the confirmation data packet returned by the receiving end will be further expanded, as shown in ④. Similarly, when the confirmation data packet passes through the intermediate node 1, the packet interval of the confirmation data packet will be further expanded. Will continue to expand, as sho...

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Abstract

The application relates to the technical field of mobile communication, and particularly relates to a data transmission method, device and system, aiming to solve the problem of wasting the power consumption of intermediate nodes in the prior art. The data transmission method provided by the embodiment of the application includes the following steps that: an intermediate node receives a data packet sent by a sending end, wherein the data packet carries a sleep identifier for indicating whether the intermediate node enters a sleep state, and the sleep identifier is determined by a sending timeinterval between the data packet and the next data packet to be sent when the sending end sends the data packet; and after forwarding the received data packet, if determining that the sleep state needs to be entered according to the sleep identifier carried in the data packet and the data packet to be sent is not received, the intermediate node enters the sleep state. Thereby, the intermediate node can adjust whether the intermediate node itself enters the sleep state or not according to the sleep identifier carried in the received data packet, the intermediate node no longer needs to keep anactive state to wait for the data packet, and thus the power consumption of the intermediate node can be effectively saved.

Description

technical field [0001] The present application relates to the technical field of communication, and in particular to a data transmission method, device and system. Background technique [0002] At present, the Transmission Control Protocol (TCP) protocol is one of the most basic protocols in the communication field. The start-up phase of TCP can be roughly divided into the slow start phase and the congestion avoidance phase. The change of Window, cwnd) describes the start-up phase of TCP, where cwnd is used to reflect the congestion degree of the network. [0003] Such as figure 1 As shown, it is a schematic diagram of the change of cwnd maintained by the sender. At the beginning, the initial value of the slow start threshold ssthresh is set. When cwnd<ssthresh, the sender uses the slow start algorithm to transmit data; when cwnd>ssthresh, the sender uses congestion avoidance Algorithm to transmit data; when cwnd=ssthresh, the sender uses slow start algorithm or cong...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/12
CPCH04L12/12H04L47/37H04L47/50
Inventor 何金薇
Owner CHINA MOBILE COMM LTD RES INST