Distributed publish-subscribe transmission method based on designated source multicast

Abstract

The invention discloses a distributed publish-subscribe transmission method based on specified source multicast, which comprises the following steps: formulating a distributed publish-subscribe transmission protocol, and performing data transmission by a network node through the protocol; making a theme and port binding strategy; initializing Network resources specifically, enabling a publisher ora subscriber to publish or subscrib a theme, sending data to a network port corresponding to the theme according to a theme and port binding strategy, and supporting different multicast publishing orsubscribing data for different themes; enabling the data publisher and the data subscriber to adopt a UDP protocol on a transmission layer; When there is a service interaction requirement of multipleinformation sources for multiple information sinks, any information source or information sink can access a network at any time, an application layer follows a DPSP protocol, and according to a themeand port binding strategy, a theme is published or subscribed, so that real-time information interaction of the multiple information sources for the multiple information sinks is realized in a distributed manner.

Description

technical field [0001] The invention relates to the field of computer network communication, and more specifically, to a distributed publish-subscribe transmission method based on designated source multicast. Background technique [0002] Information systems such as wind power equipment status remote monitoring system, radar communication and military command and control, etc., have many network sensor nodes and complex structures, which require high real-time performance, large data volume, and high reliability for network data transmission. At present, the point-to-point unicast transmission method is still widely used, but in the application scenario of sending and receiving multiple times, there are problems such as weak anti-strike ability and high network load. [0003] Multicast effectively solves the problem of one transmission and multiple receptions, and has a wide range of applications in early warning detection systems, multi-user real-time data interaction, etc....

AI Technical Summary

Problems solved by technology

In 2014, "Journal of Southeast University (Natural Science Edition)" Volume 44, Issue 3, "Data Distribution Method for Multi-node Collaboration under the Subscription / Publishing Mode" and in 2006, "Computer Engineering", Volume 32, Issue 14, "Theme-based Data Subscription and Distribution "Technology" describes the principle of data interaction in detail. The publishing and subscription of data is managed by a data proxy server or a data distribution server. This data interaction mode is easy to use and has a high degree of decoupling for the client software design of the information system. Support dynamic network expansion, suitable for multipoint-to-multipoint system internal data transmission, but it will bring greater data processing pressure to the server

[0005] In summary, the above-mentioned real-time data transmission methods still have problems such as single communication method, weak anti-strike ability, and heavy load on the network and data proxy server.

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