A NEW GENERATION OF RUSSIAN SATELLITE COMMUNICATION SYSTEMS. OPTIONS FOR CREATION OF TERMINAL EQUIPMENT AND REALIZATION OF SERVICES

Описаны возможные направления создания терминального оборудования для новых спутниковых систем связи российского проекта «Сфера». Рассмотрены варианты построения терминальных систем для космических аппаратов «Марафон IoT» и «Скиф-Д». The possible directions of creating terminal equipment for new satellite communication systems of the Russian project Sphere are described. The options for constructing terminal systems for spacecrafts Marathon IoT and Skif-D are considered.

Design and research of port automatic magnetic mooring device based on electromagnetic technology

With the rapid development of modern science and technology, ship design and construction are becoming more and more large-scale, professional and intelligent, and the degree of integration, intelligence and modularization of port and terminal equipment is also getting higher and higher. Smart ships and wisdom The construction of ports has become an important trend in the development of the shipping industry. Although the rope materials of modern ships have been greatly improved, the main mooring method of ships still relies on the traditional operation method of manual mooring [1], which has low operation efficiency, high degree of danger and high risk factor. This article mainly studies the use of electromagnetic technology to realize the automatic berthing and unberthing of ships. The electromagnetic mooring device is controlled by the remote control system to realize the automatic berthing and unberthing operations of the ship, and the height and angle are automatically adjusted according to the tide and loading conditions to realize berthing monitoring.

Research on Security Access of Power Internet of Things Terminals Based on Edge Computing Technology

In view of the current lack of unified security authentication and control for the power Internet of Things terminal equipment, at the perception level of the power Internet of Things, the perception layer terminal access control, front-end authentication technology realization and terminal equipment abnormal behavior detection methods are proposed. This method enhances the communication security between power equipment and edge nodes, and ensures the safe and stable operation of the power Internet of Things.

Intelligent support and command system based on WAPI terminal equipment

In order to solve the problem that the process of WAPI terminal connection is troublesome, this paper proposes an intelligent support and command system of WAPI terminal equipment based on centralized control AC + AP architecture. The system stores WAPI certificate on AC (centralized controller), WAPI terminal equipment is associated with AP (wireless access point), and AP equipment notifies AC of the associated events of the terminal, AC equipment and terminal equipment enter authentication and complete certificate authentication. Complete access authentication through AC and terminal equipment, and store the unicast and multicast keys generated by authentication negotiation on AC. This method is more convenient to maintain the certificate. At the same time, on the premise of ensuring the security of the certificate, it also improves the encryption and decryption efficiency and improves the user’s business experience.

Analysis of Thermostat Design for Vertical Fan Coil Units Within Modern Window-Wall Condominium Suites

The aim for this research is to identify the issues with poor thermostat designs in a window-wall condominium suite during cooling season, and to investigate how low-cost changes in the design can improve occupant comfort, reduce energy consumption, and increase terminal equipment service life. Temperature logging and fan coil operation monitoring procedures were carried out during the peak cooling season in a sample condominium suite located in Toronto, Ontario. Data was collected and analyzed presenting the effects of thermostat installation in proximity of an exterior window-wall and supply air diffuser, and system durability concerns of implementing a proportional-based algorithm via pulse width modulation. Several design changes have been proposed that can be implemented at negligible cost during construction design and are expected to lead to comfort and system improvements during the cooling season.

Analysis of Thermostat Design for Vertical Fan Coil Units Within Modern Window-Wall Condominium Suites

The aim for this research is to identify the issues with poor thermostat designs in a window-wall condominium suite during cooling season, and to investigate how low-cost changes in the design can improve occupant comfort, reduce energy consumption, and increase terminal equipment service life. Temperature logging and fan coil operation monitoring procedures were carried out during the peak cooling season in a sample condominium suite located in Toronto, Ontario. Data was collected and analyzed presenting the effects of thermostat installation in proximity of an exterior window-wall and supply air diffuser, and system durability concerns of implementing a proportional-based algorithm via pulse width modulation. Several design changes have been proposed that can be implemented at negligible cost during construction design and are expected to lead to comfort and system improvements during the cooling season.

An Effective Toss-and-Catch Algorithm for Fixed-Rail Mobile Terminal Equipment That Ensures Reliable Transmission and Non-Interruptible Handovers

The physical characteristics of fifth generation (5G) cellular network wavelengths result in quicker attenuation and smaller base station (BS) coverage area, which in turn, cause BSs to naturally transform into small cell BSs (SBSs). However, in the case of fixed-rail transportation, they often cover long distances when deployed and pass by multiple SBSs; hence, the connection of the terminal equipment in these forms of transportation is subjected to frequent handovers. Therefore, it is important to address the issue of identifying suitable SBSs for each handover such that a certain level of service quality and non-interruptible transmission can be achieved. In the present study, we proposed a new handover selection algorithm named the toss-and-catch algorithm. By means of an efficient SBS selection mechanism and configuration settings, the algorithm selects suitable SBSs to ensure reliable transmission and non-interruptible handovers. Meanwhile, with the assistance of an overload support mechanism, the algorithm is able to resist changes in channel environments under most conditions. In order to apply our results in more realistic channel environments, we performed all-inclusive simulations based on different symmetric fading channel environments, with the aim of developing more practical SBS selection and handover methods for mobile terminal equipment. The multitude of simulation results indicates that from the perspective of terminal equipment in fixed-rail transportation, under most conditions, the performance of the toss-and-catch algorithm in terms of signal quality and handover connection was superior to those of other conventional methods. For example, the toss-and-catch algorithm outperformed the random SBS selection method in a typical fading channel environment (e.g., Nakagami-1 fading), achieving, on average, an approximately 28% improvement in signal quality, an approximately 50% reduction in the disconnection rate for handover connections, and an approximately 71% improvement in processable load ratio. These results indicate that the toss-and-catch algorithm allows for a greater number of suitable SBS handover candidates to be identified, making it a promising SBS handover selection mechanism for 5G fixed-rail transportation networks.