Method for controlling multi-priority connection congestion time windows in multi-path TCP

Abstract

The invention discloses a method for controlling multi-priority connection congestion time windows in a multi-path TCP (transmission control protocol) and belongs to the field of a network communication technology. The method is applied to terminal equipment including a multi-core processor and multiple independent physical network interfaces and the network communication process where multiple TCP paths are established by multiple tasks via MPTCP. When the TCP congestion time windows of high-priority tasks are required to be increased, the congestion time windows are constantly ensured as the maximum value of the TCP congestion time windows of all present tasks by the method; when the TCP passageway generation data packets of the high-priority tasks lose, the TCP congestion time windows of various tasks on the same network interface are reduced by one half via the method. When multiple tasks perform network communication via MPTCP and various tasks can select transmission paths with better performances by the method, the high-priority tasks can acquire more network resources; thus the communication service quality of the high-priority tasks can be ensured even if the reception requests of the present TCP path are overmuch and congested.

Description

technical field [0001] The invention relates to a multi-priority connection-oriented congestion time window control method in multi-path TCP, which belongs to the technical field of network congestion control. Background technique [0002] With the continuous development of network technology and computer technology, terminal devices in the network usually have multiple types and multiple network access ports at the same time, such as mobile phones with 3G / 4G / Wifi network interfaces, and laptops with Wifi / RJ45 / 3G networks interface. In order to achieve the convergence of these heterogeneous communication media and realize seamless switching between networks, multipath TCP has become a key technology. Multipath TCP (Multipath Transmission Control Protocol, MPTCP) is an improvement on the basis of the TCPIP protocol, and uses multiple paths that coexist simultaneously for data transmission. MPTCP has been included in the RFC document by the Internet Society (ISOC) organizati...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the existing technology, provide a multi-path TCP-oriented congestion time window control method for multi-priority connections, overcome the inability to adjust the size of the congestion window for TCP links with different priorities in the existing MPTCP, and use As for the shortcoming of large network delay caused by high priority TCP connections unable to obtain more network resources when network resources are tight

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