Congestion time window control method for multi-priority connections in multi-path tcp

Abstract

The invention relates to a congestion time window control method for multi-priority connections in multi-path TCP, belonging to the technical field of network communication. The method is applied to a process in which a terminal device has a multi-core processor, has multiple independent physical network interfaces, and has multiple tasks using MPTCP to establish multiple TCP paths for network communication. When the TCP congestion time window of a high-priority task needs to be increased, this method always ensures that its congestion time window is the maximum value of the TCP congestion time window of all current tasks; when a packet loss occurs on the TCP channel of a high-priority task, the method The method will reduce the TCP congestion time window of each task on the same network interface by half. When multi-tasks use the MPTCP protocol for network communication, this method ensures that each task can choose a transmission path with better performance, and the high-priority task can obtain more network resources, so that the high-priority task can obtain more network resources even in the current TCP The communication service quality of the path can be guaranteed when there are too many sending and receiving requests or even congestion.

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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