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Congestion control method and device

A congestion control and congestion window technology, applied in the field of communication, can solve problems such as network bandwidth waste and achieve the effect of improving utilization

Active Publication Date: 2016-10-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the above technical solutions, it is easy to cause waste of network bandwidth

Method used

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  • Congestion control method and device

Examples

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Embodiment Construction

[0051] The technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Several terms are involved in the examples. For the meaning of terms involved in the embodiments, please refer to request for comments (request for comments, RFC) 2581, RFC2018 and RFC2883.

[0052] According to RFC2581, the sender considers a segment lost after receiving three duplicate acknowledgments. Furthermore, the sender thinks that the network is congested, reduces the congestion window, and sends the segment considered lost to the receiver according to the reduced cong...

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Abstract

The embodiment of the present invention discloses a congestion control method and device. The method comprises the steps that a sending party sets the value of a congestion window as a first value according to a rapid retransmission algorithm, and sends a first segment to a receiving party according to the congestion window; the sending party receives the confirmation coming from the receiving party after sending the first segment to the receiving party, wherein the confirmation carries a repeated selection confirming block; the sending party sets the value of the congestion window as a second value according to a ratio, wherein the ratio is equal to a result of dividing the number of the bytes of a repeated segment received by the receiving party by the number of the bytes of the first segment, the second value is greater than the first value, the number of the bytes of the repeated segment is equal to the difference of the right boundary and the left boundary of the repeated selection confirming block, and the repeated segment is a subset of the first segment. According to the above scheme, the utilization rate of the network bandwidth is conducive to being improved.

Description

technical field [0001] The invention relates to the communication field, in particular to a congestion control method and device. Background technique [0002] Transmission Control Protocol (Transmission Control Protocol, TCP) is a transport layer protocol. The algorithms of TCP congestion control include: slow start (slow start), congestion avoidance (congestion avoidance), fast retransmit (fast retransmit) and fast recovery (fast recovery). [0003] Among them, the fast retransmission algorithm includes: when the sender (sender) receives three duplicate acknowledgments (3duplicate ACKs), it considers that the segment (segment) is lost, and the sender retransmits the lost segment without waiting for the retransmission timer time out. The fast recovery algorithm includes: when the sender receives three repeated acknowledgments, the sender reduces the congestion window by "multiplicative reduction" and halves the slow start threshold (Slow Start Thresh, ssthresh). In the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/807H04L12/825H04L47/27
Inventor 朱坤吴钊源
Owner HUAWEI TECH CO LTD