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Abstract. The present paper reviews communication protocols which has been implemented in modern Building Management System/Building Automation System (BMS/BAS) systems. Selected BMS/BAS features, according to customers' requirements are given. The most important BMS/BAS functions are outlined and protocols description is made. Reviewed are different options for selection by vendors.
Keywords. Building Management System, Building Automation System, BMS, BAS, smart buildings.
1.Introduction
The Internet-of-things (IoT) concept brings information technologies to everything. Our surrounding world becomes "smart"-er. There are several IoT mainstreams. One of the most dynamic development area is IoT in homes and offices. IoT market forecasts show that the new technological revolution is already making an impact on the global economy. While estimates of the economic impact during the next five to ten years vary slightly (IDC estimates USD 1,7 trillion in 2020 [1], Gartner sees a benefit of USD 2 trillion by that time [2], and McKinsey predicts growth of USD 4 trillion to USD 11 trillion by 2025 [3]), there seems to be a consensus that the impact of IoT technologies is substantial and growing [4].
At present, buildings' sustainability is mainly based on applied in information technologies. Building Management Systems (BMS) / Building Automation Systems (BAS) increases the share of information technologies in the buildings and makes them "smarter". BMS/BAS systems unite sub systems in one integrated system with one point of management. Communication between BMS/BAS Field Level (sensors and detectors) and the next Automation Level(main controllers, signal input-output units, and various switching equipment) is organized with protocols and there are different kind of them.
The philosophy of BMS/BAS systems is to apply integrated approach of management of all available information technology in the buildings related to the cost efficiency and comfort. The three main parts of each IoT systems are hardware, communication network and software. Hardware and software capabilities of BMS are nearly the same among the international producers, but the important point is that the art of using this capabilities is in the process of designing, programming, installing and especially setting up the system. The above mentioned advantages for this system, specially optimizing energy consumption, reducing maintenance expense, managing heating-cooling and electric facilities, and increasing the level of residents' comfort directly depend on the quality and design of programming...