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are four protocol standards for short-range wireless communications with low power consumption. From an application point of view, Bluetooth is intended for a cordless mouse, keyboard, and hands-free headset, UWB is oriented to high-bandwidth multimedia links, ZigBee is designed for reliable wirelessly networked monitoring and control networks, while Wi-Fi(More)
  • Jin-Shyan Lee
  • 2005
IEEE 802.15.4 is an emerging standard specifically designed for low-rate wireless personal area networks (LR-WPAN) with a focus on enabling the wireless sensor networks. It attempts to provide a low data rate, low power, and low cost wireless networking on the device-level communication. In this paper, we have established a realistic environment for the(More)
—In semiautonomous mobile sensor networks (MSNs), since human operators may be involved in the control loop, particular improper actions may cause accidents and result in catastrophes. For such systems, this paper proposes a command filtering framework to accept or reject the human-issued commands so that undesirable executions are never performed. In the(More)
Web-based simulation of hybrid automation systems has attracted much attention. However, most available modeling approaches usually result in unnatural and complex models as both discrete logic and continuous behavior are involved. Based on the multi-paradigm modeling concept, this paper extends the traditional discrete statechart to model the continuous(More)
Low power design of wireless technologies is a critical point for future Internet of things (IoT) applications. In this paper, we provide a preliminary study of low-power wireless communication standards: ZigBee and BLE, evaluating their main features and behaviors in terms of various metrics, including the transmission time, data coding efficiency, power(More)
—For Internet-based remote control systems, certain human operations may violate desired safety requirements and result in catastrophic failure. For such human-in-the-loop systems, this paper proposes a systematic approach to developing supervisory agents which guarantee that remote manual operations meet safety specifications. By applying the mutual(More)
—In a distributed robotic system, both human-controlled (semi-autonomous) and computer-controlled (fully autonomous) robots may simultaneously exist. From the global system's point of view, supervisory control for the interactions between the human and computer are important and necessary. For such human–computer interactive systems, this paper proposes a(More)
—For large-scale and long-distance distributed systems , this paper proposes a systematical multiparadigm approach to develop the simple network management protocol (SNMP) agents for remote monitoring and control. The standard unified modeling language (UML) is adopted for modeling the system, and then the Petri-net model is applied to achieve both(More)