17,234 research outputs found
Scale-free topology optimization for software-defined wireless sensor networks: A cyber-physical system
Due to the limited resource and vulnerability in wireless sensor networks, maximizing the network lifetime and improving
network survivability have become the top priority problem in network topology optimization. This article presents
a wireless sensor networks topology optimization model based on complex network theory and cyber-physical systems
using software-defined wireless sensor network architecture. The multiple-factor-driven virtual force field and network
division–oriented particle swarm algorithm are introduced into the deployment strategy of super-node for the implementation
in wireless sensor networks topology initialization, which help to rationally allocate heterogeneous network
resources and balance the energy consumption in wireless sensor networks. Furthermore, the preferential attachment
scheme guided by corresponding priority of crucial sensors is added into scale-free structure for optimization in topology
evolution process and for protection of vulnerable nodes in wireless sensor networks. Software-defined wireless
sensor network–based functional architecture is adopted to optimize the network evolution rules and algorithm parameters
using information cognition and flow-table configure mode. The theoretical analysis and experimental results
demonstrate that the proposed wireless sensor networks topology optimization model possesses both the small-world
effect and the scale-free property, which can contribute to extend the lifetime of wireless sensor networks with energy
efficiency and improve the robustness of wireless sensor networks with structure invulnerability
Supporting Cyber-Physical Systems with Wireless Sensor Networks: An Outlook of Software and Services
Sensing, communication, computation and control technologies are the essential building blocks of a cyber-physical system (CPS). Wireless sensor networks (WSNs) are a way to support CPS as they provide fine-grained spatial-temporal sensing, communication and computation at a low premium of cost and power. In this article, we explore the fundamental concepts guiding the design and implementation of WSNs. We report the latest developments in WSN software and services for meeting existing requirements and newer demands; particularly in the areas of: operating system, simulator and emulator, programming abstraction, virtualization, IP-based communication and security, time and location, and network monitoring and management. We also reflect on the ongoing
efforts in providing dependable assurances for WSN-driven CPS. Finally, we report on its applicability with a case-study on smart buildings
Smart Grid Communications: Overview of Research Challenges, Solutions, and Standardization Activities
Optimization of energy consumption in future intelligent energy networks (or
Smart Grids) will be based on grid-integrated near-real-time communications
between various grid elements in generation, transmission, distribution and
loads. This paper discusses some of the challenges and opportunities of
communications research in the areas of smart grid and smart metering. In
particular, we focus on some of the key communications challenges for realizing
interoperable and future-proof smart grid/metering networks, smart grid
security and privacy, and how some of the existing networking technologies can
be applied to energy management. Finally, we also discuss the coordinated
standardization efforts in Europe to harmonize communications standards and
protocols.Comment: To be published in IEEE Communications Surveys and Tutorial
- …