Industrial SDN network data transmission method and system capable of supporting packet header compression

Abstract

The invention discloses an industrial SDN network data transmission method and system capable of supporting packet header compression. The method includes: in a transmission preparation stage, an edge switch receives and forwards data to a controller, and the controller distributes an identifier ID for non-real-time data and sends a distribution result to a switch on a transmission path in the format of a flow table; and in a data transmission stage, the edge switch directly performs forwarding operation on real-time data, performs packet header compression / decompression on the non-real-time data, and forwards the data after a packet header adds / removes the identifier ID. A core switch matches the real-time data with L2 layer packet header information, matches the identifier ID with the non-real-time data, and forwards the data according to a matching flow table. The system comprises a controller and a switch capable of realizing functions of compression / decompression of the data packet header and identifier adding / removing. According to the method and system, the bandwidth cost can be reduced, the data forwarding speed can be increased, the data transmission efficiency is improved, more network resources are reserved for real-time data transmission of an industrial network, and the overall transmission performance of the industrial network is enhanced.

Description

technical field [0001] The present invention relates to the field of network technology, and more specifically relates to an industrial SDN network data transmission method and system supporting packet header compression. Background technique [0002] With the development of Internet technology, industrial information interconnection and equipment IP have gradually become the development direction of future industrial networks. There is a large amount of redundant information in the header of the IP protocol, which reduces the channel utilization. The problem becomes even more acute for networks with limited channel bandwidth and the widespread use of new protocols with multiple complex headers. For example, an application based on the TCP / IPv4 protocol has a basic packet header length of 40 bytes. When IPv6 is used, the packet header length increases to 60 bytes. In industrial networks, the transmitted data is often sensory data such as temperature and pressure, and the e...

AI Technical Summary

Problems solved by technology

However, the existing SDN network protocol (openflow) does not support the data packet header compression function, and cannot perform data compression in the SDN network

Moreover, the flow table lookup of the SDN network is based on the matching of packet header tuples, which takes a long time and reduces the forwarding speed.

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