Uncertainty Analysis in Time Distribution Mechanisms for OMS Smart Meters: The Last-Mile Time Synchronization Issue
In this paper, advantages and limits of the current standard, when wireless M-bus (wM-bus) is used as a physical layer, are highlighted by means of the analysis of the synchronization uncertainty sources, and by the experimental evaluation. Next, a custom synchronization method is applied for the first time, since the current OMS standard does not propose any solutions. The analysis and the experimental characterization indicate that the synchronization limit on the last-mile segment of wM-bus, using off-the-shelf components, is on the order of 1.8 μs.
The Energy Management System (EMS) is able to control and to regulate the HV AC system, considering an occupancy rate model able to take into consideration user' habits and the indoor air quality (IAQ), provided in near real-time by IoT sensors. This approach has been applied to the eLUX lab building of the campus of the University of Brescia, Italy.
Analisys of modular bridge platform for heterogeneous software defined networking in smart city applications
In this paper, a low-cost modular bridge platform for heterogeneous Software Defined Networking (SDN) has been characterized. The results highlight that the considered low cost platform is able to handle, without affecting the performance of the system, more than 600 kp/s (coming from three Gigabit Ethernet ports and one IEEE 802.11n port) and to properly forward more than one hundred of different data streams.
Typically, EVs and electrical charging stations exchange information about the required charging current, but, commonly, few data are available about the State of Charge (SOC) of the EV battery and the typical EV usage profile. The availability of such information, however, represents a key factor for the optimal management of energy flows, especially in private grids managed by an Energy Management System (EMS).