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With rapid advancements in sensing, networking, and computing technologies, recent years have witnessed the emergence of cyber-physical systems (CPS) in a broad range of application domains. CPS is a new class of engineered systems that features the integration of computation, communications, and control. In contrast to general-purpose computing systems,(More)
Robustness is an important and challenging issue in Internet of Things (IoT), which contains multiple types of heterogeneous networks. Improving the robustness of topological structure, i.e., withstanding a certain amount of node failures, is of great significance especially for the energy-limited lightweight networks. Meanwhile, a high-performance topology(More)
Localization based on received signal strength indication (RSSI) is a low cost and low complexity technology, and it is widely applied in distance-based localization of wireless sensor networks (WSNs). Error of existed localization technologies is significant. This paper presents the N-times trilateral centroid weighted localization algorithm (NTCWLA),(More)
Time synchronization is essential in the implementation of large-scale Wireless Sensor Networks (WSNs). However, many approaches of time synchronization suffer from high communication overheads when pursuing high accuracy. Such overheads cause significant shrinkage of the lifetime of WSNs since frequent data communications consume much energy which is(More)
Tasks scheduling problem in cloud computing is NP-hard, and it is difficult to attain an optimal solution, so we can use intelligent optimization algorithms to approximate the optimal solution, such as ant colony optimization algorithm. In order to solve the task scheduling problem in cloud computing, a period ACO_based scheduling algorithm (PACO) has been(More)
In energy constrained wireless sensor networks, it essentially requires to make full use of the energy and maximize the network lifetime even when facing some unexpected situations. We consider an emergent situation that a mobile cluster head is broken down, which leads to the missing packets. We aim at recovering the failure cluster and achieving balanced(More)
In large-scale wireless sensor networks (WSNs), when the consumption of hardware is limited, how to maximize the performance has become the research focus for improving transmission quality of service (QoS) of WSNs in recent years. This paper presents a new evaluation method for packet buffer capacity of nodes using queueing network model, whose packet(More)