A Multipath TCP Congestion Control Method Based on Sequential Packet Marking
A congestion control, multi-path technology, applied in digital transmission systems, electrical components, transmission systems, etc., to ensure fairness, good load balancing characteristics, and shorten the time to respond to congestion
Active Publication Date: 2018-03-09
广西优耐信息技术有限公司
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[0007] However, this congestion control method of congestion marking is only applicable to a single path. For the data network center, a set of congestion control method for multi-path TCP transmission needs to be designed separately.
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[0042] The method of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0043] The embodiment of the multipath TCP congestion control method based on continuous message marking is applied to a data center network. Such as figure 1 As shown, the topology structure of the data center network includes a three-layer switching architecture, which are the access layer TO, the aggregation layer AG, and the core layer CO. The CO at the core layer includes multiple core switches, which can provide multiple available paths for data transmission between different servers in the network and increase the bandwidth of shared links. figure 1 There are two paths from server A to server B.
[0044] The embodiment of the multipath TCP congestion control method based on continuous message marking, the specific steps are as follows:
[0045] Ⅰ. The switch adds a congestion mark
[0046] The switch uses rand...
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The invention is a multi-path TCP congestion control method based on continuous message marking. When the buffer queue length is greater than the marking threshold K, the switch adds a congestion marking to the output message; the receiving server feeds back the congestion marking through the confirmation message, and the sending party The server receives the confirmation message and updates the confirmation message matrix MTi according to whether there is a mark, and calculates the sum of the matrix changes in the T period. When this value is greater than the congestion threshold θ, calculate the congestion factor α, and reduce the congestion window proportionally to α , α≤1 / 2, the congestion window of the sent message has been reduced flag is set; if it is not greater than θ or the received confirmation message has no congestion flag, the congestion window is increased according to the joint growth algorithm. The congestion state information of the path in the present invention is accurately fed back to the sender within one RTT, and the congestion window is reduced proportionally and constrainedly according to the congestion degree, and each link is fully utilized to ensure the implementation of multi-path transmission, which is suitable for data of multi-path architecture central network.
Description
technical field [0001] The invention relates to the technical field of data center networks, in particular to a multi-path TCP congestion control method based on continuous message marking in the data center network. Background technique [0002] The data center network is composed of tens of thousands of servers interconnected through commercial switches, providing network services for enterprises and institutions. It has the characteristics of high bandwidth, low delay, large traffic scale and strong burst. The data center network adopts a multi-level network architecture. The server is located at the bottom layer, and the commercial switches are located upwards, which are divided into access layer, aggregation layer and core layer in turn. The topology of the multi-level network architecture of the data center network can provide multiple available paths between servers at the same time. For example, in a multi-level tree (Fat-Tree) architecture, two servers located betw...
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IPC IPC(8): H04L12/803H04L12/807H04L12/841H04L47/27
Inventor 叶进张智卫
Owner 广西优耐信息技术有限公司