A tcp congestion control method based on throughput change rate and ecn mechanism

A congestion control and throughput technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as inability to apply data center networks and congestion control, and achieve the effect of avoiding halving the sending window and avoiding congestion

Active Publication Date: 2015-09-16
BEIHANG UNIV
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Problems solved by technology

However, wireless TCP congestion control methods cannot control congestion in advance, and cannot be applied to data center networks.

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  • A tcp congestion control method based on throughput change rate and ecn mechanism
  • A tcp congestion control method based on throughput change rate and ecn mechanism

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] The purpose of the present invention is to propose a TCP congestion control method based on throughput rate of change and ECN mechanism, which can be used in wired data center network and wireless network at the same time. This method performs ECN marking on the switch, and the receiver determines whether the ACK it sends should set the ECN-echo bit according to the state of the ECN marking bit in the received data packet. The sender calculates the conversion rate of the throughput and dynamically adjusts the sending window according to the state of the ECN-echo bit in the received ACK. The present invention comprehensively considers the characteristics of the data center network and the wireless network, can alleviate the TCP Incast phenomenon of the wired data center network, and simultaneously avoid network performance degradation cau...

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Abstract

The invention provides a TCP (transmission control protocol) congestion control method based on throughout change rate and an ECN (Explicit Congestion Notification) mechanism. The method uses an ECN mechanism to prevent congestion, and comprises the following steps of when no ECN marks exist, if a packet is lost, judging the reason of packet loss according to the change rate of throughout, further adjusting a transmitting velocity instead of halving blindly, thereby avoiding severe performance problems caused by wireless random packet loss; and meanwhile, when no packet is lost, adjusting the increasing of windows according to the change rate of the throughout, further preventing congestion. By combining the ECN technology and the control method based on the throughout change rate, ECN can perform controlling in mild congestion of a network, thereby avoiding TCP Incast phenomenon in a wired data center; the control method based on the throughout change rate can be used for adjusting the sending windows according to the throughout change rate of the current network, when the packet is lost, the reason of the packet loss can be judged, so that the halving of the sending windows caused by wireless random packet loss can be avoided.

Description

technical field [0001] The invention relates to the technical field of computer network and communication, in particular to a TCP congestion control method based on throughput change rate and ECN mechanism. Background technique [0002] Traditional wired data center network TCP congestion control algorithms use packet loss in the network as a congestion signal. When packet loss occurs, the algorithm will reduce the speed at which data packets are sent on the connection, thereby avoiding network congestion. [0003] As the scale of the data center expands, the phenomenon of uneven network load distribution becomes more and more serious, and the wiring problem of the wired data center becomes more and more complicated. To solve these problems, wireless technology was introduced into the existing wired data center network. However, due to the unreliability of the wireless network medium, there are a large number of random packet loss unrelated to congestion in the network. Th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/807H04L12/823H04L47/27H04L47/32
Inventor 王静远蒋云晶李超熊璋
Owner BEIHANG UNIV
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