Research of Automated Control Systems Development Based on “Publish-Subscribe” Technology Over Low-Bandwidth Radio Networks

Abstract

AbstractThe development of automated control systems (ACS) based on low-bandwidth communication networks of UHF/VHF radio stations is the major problem concerning the system nodes intercommunication and information exchange. The high-throughput communication networks have solved this problem by means of algorithms and protocols based on “publish-subscribe” technology. However, it is necessary to research the ability to use such technology over low-bandwidth communication networks. This research is focused on automated control systems development based on Message Queuing Telemetry Transport (MQTT) and Data Distribution Service (DDS) by Object Management Group (OMG) protocols. The ability to use such mechanism of data exchange over governmental ACS of the low echelon management level based on VHF/UHF radio stations with high requirements to safety, liveliness and reliability are shown. The MQTT, MQTT-SN and DDS protocols analysis was performed. The data about service packets quantity, lost packets quantity, maximal packet size, actual volume of service and information data was performed and the time of communication establishment between MQTT, MQTT-SN and DDS nodes was defined. The recommendations concerning “publish-subscribe” protocols usage in ACS development were given.KeywordsPublish-subscribeMQTTMQTT-SNDDSACSQoSTraffic characteristicsUHF/VHF radio stationLow-bandwidth networkBrokerGatewayRTPS