The influence of man-made interference on the differential correction signal generated by the reference stations (RS) based on the existing radio beacons in the frequency band 283.5-325.0 kHz at designing a control and management system (CMS) of the river local differential subsystem (RLDSS) GLONASS/GPS on inland waterways is considered in the paper. Since among the man-made interference the noises from corona discharges of high voltage power lines will have dominant effect on the differential correction signal, then when power lines pass near the boundaries of RS operation zones, the significant local discontinuities of the differential field may occur. In turn, the breach of the differential correction field integrity will lead to a decrease in the navigation safety on inland waterways at using the instrumental methods of pilotage. To calculate the noise immunity of the RS-vessel radio channel under the influence of man-made interference, a method based on calculating the error probability of piece-by-piece reception of a digital differential correction signal is used. The aim of the paper is to determine the assessment of the man-made interference impact on the differential field integrity by applying an algorithm for calculating the error probability. The algorithm includes the definition of signal energy in the radio channel with fluctuation and man-made noise in the absence of mutual interference. Exceeding the permissible magnitude of the error probability will signify the breach of the differential field integrity by the man-made interference impact and the appearance of local discontinuities of the field, where it is required to install additional remote control points. Thus, the use of this calculation algorithm minimizes the number of the remote control points, which is required when deploying the control and management system.
The article presents the concept of building an effective telecommunications subsystem for a remotely piloted sea tug operating in the area of responsibility of a local vessel traffic control system. This concept, in turn, was developed within the framework of the concept of unmanned navigation being created in the Russian Federation, called the A-navigation concept. The work was carried out using an engineering-cybernetic approach to the design of complex systems. According to this approach, the projected subsystem is considered not in isolation, but as part of a complex hierarchical system, at the upper level of which the concept of a metasystem is introduced, which in relation to the telecommunications subsystem is a local ship traffic control system. The goals and objectives of the local vessel traffic control system are considered and the requirements for a remote-controlled tugboat and its telecommunications subsystem are determined. The main stages of operation of the remotely piloted tug are determined. The operations carried out within the framework of the functions of the telecommunications subsystem included in the studied system of this tug are identified and investigated. Along with the functional requirements, the most important requirements are the absence of interference to the existing radio channels of the vessel traffic control system from the telecommunications subsystem and the provision of a cybersecurity regime to exclude unauthorized interference in the management of the tugboat. The scheme of automatic authentication of the operator and his remotely piloted tug is presented. The optimal structure of the telecommunications subsystem is determined, recommendations are presented on the choice of control channels, telemetry and visualization, as well as on the choice of protocols for its ship and shore local networks. The problem of creating a reliable visualization radio channel is considered and ways to solve it are proposed.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.