MPTCP routing method based on SDN

Abstract

The invention discloses an MPTCP routing method based on an SDN, and relates to the field of information and communication, in particular to a flow scheduling technology of a spatial information network. In order to solve the problems of easy link interruption and low link resource utilization rate in a spatial network, the method comprises the following steps of: establishing a path Cache hash table, and establishing a packet for an input new data flow; and after a new substream packet is established, inquiring whether a group of paths corresponding to the IP addresses of the source node and the destination node of the substream exist in the path Cache hash table, if so, loading the group of paths to the flow hash table by the forwarding module, mapping the paths to the connection requesting the MPTCP, and when a data packet of the new substream reaches the first switch of the network, enabling the first switch to extract IP addresses of a source node and a destination node through a forwarding module, extract MPTCP options at the same time, and distribute paths to substreams according to the extracted options.

Description

technical field [0001] The invention relates to the field of information and communication technology, in particular to the flow scheduling technology of spatial information network. Background technique [0002] The space network is an all-space, all-time, all-frequency, multi-user-oriented information network, which is more complex than the traditional terrestrial network. Based on the satellite constellation architecture, due to the large number of satellite nodes, the traditional distributed architecture is used in large-scale satellite networks, and it is very difficult to control it. The user demand increases, and the network traffic surges and is uncontrollable. [0003] Propagation delays in LEO systems can be as high as 100ms and degrade TCP throughput substantially. Existing solutions for the transport layer include high bandwidth-delay product (BDP) TCP variants, but none of them handle the handover problem well. [0004] There is only one transmission path for ...

AI Technical Summary

Problems solved by technology

Based on the satellite constellation architecture, due to the large number of satellite nodes, the traditional distributed architecture is used in large-scale satellite networks, and it is very difficult to control it. The user demand increases, and the network traffic surges and is uncontrollable

[0003] Propagation delays in LEO systems can be as high as 100ms and degrade TCP throughput substantially

Existing transport layer solutions include high bandwidth delay product (BDP) TCP variants, but none of them handle switching well

[0004] There is only one transmission path for traditional protocol data. When this path is congested or fails, the quality of data transmission will be directly reduced, and in severe cases, the transmission will be terminated.

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