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Wireless sensor networks (WSNs) have been widely used in industrial systems that demand a high degree of reliability and real-time performance in communications. However, because of limited network resources and delays caused by transmission conflicts and channel contention, many industrial applications cannot meet these demands. To resolve these issues, we introduce Narrow Band Internet of Things...
Industrial systems demand high degree of reliability and real-time requirements in communications. To meet the stringent real-time performance requirements of control systems, there is a critical need for estimation system schedulability before system running. Concerning this issue, in this paper, we propose a supply/demand bound function analysis approach based on earliest deadline first scheduling...
WirelessHART, as a robust and reliable wireless protocol, has been widely-used in industrial wireless sensoractuator networks. Its real-time performance has been extensively studied, but limited to the single criticality case. Many advanced applications have mixed-criticality communications, where different data flows come with different levels of importance or criticality. Hence, in this paper, we...
Broadcast authentication, a fundamental feature in wireless sensor networks (WSNs), enables users to broadcast to multiple sensor nodes in an authenticated way. Symmetric-key-based muTESLA-like schemes are a popular solution due to their energy efficiency, but most schemes are not scalable (e.g. in terms of the number of senders). On the other hand, several schemes based on public key cryptography...
A co-design of sampling rate scheduling and optimal control is investigated for networked control systems (NCSs) with transmission delay and packet loss. The basic purpose of proposed co-design scheme is to save substantial communication in both the sensor-to-controller channels and the controller-to-actuator channels, while guaranteeing optimal control performance of NCSs. Firstly, a switched systems...
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