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TCP (transmission control protocol) congestion control method based on throughout change rate and ECN (Explicit Congestion Notification) 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: 2013-04-17
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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  • TCP (transmission control protocol) congestion control method based on throughout change rate and ECN (Explicit Congestion Notification) mechanism
  • TCP (transmission control protocol) congestion control method based on throughout change rate and ECN (Explicit Congestion Notification) mechanism

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Embodiment Construction

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

[0020] The purpose of the present invention is to propose a TCP congestion control method based on throughput change rate 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 decides whether the ECN-echo bit should be set in the ACK it sends according to the state of the ECN mark bit in the received data packet. The sender calculates the throughput conversion rate 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 at the same time avoid the network performance degradation caused by wireless pack...

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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 present invention relates to the field of computer network and communication technology, in particular to a TCP congestion control method based on throughput change rate and ECN mechanism. Background technique [0002] The traditional TCP congestion control algorithm for wired data center networks uses packet loss in the network as a congestion signal. When packet loss occurs, the algorithm will reduce the transmission speed of connected data packets, thereby avoiding network congestion. [0003] With the expansion of data centers, the uneven distribution of network load has become more and more serious, and the wiring problems of wired data centers have become more and more complicated. In order to solve these problems, wireless technology is introduced into the existing wired data center network. However, due to the unreliability of the wireless network media, there are a large number of random packet loss unrelated to congestion in the network. These...

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Application Information

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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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