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Wireless sensor networks (WSNs) serving in hostile environments are susceptible to multiple collocated failures due to explosives and natural calamities such as avalanches, landslides, etc., which can partition the network into disjoint segments. In such a scenario, federating the segments becomes essential for reestablishing communication among segments and resuming the WSN operation. Placing relays...
Control systems using sensors and wireless networks are becoming more prevalent, due to its ease of deployment: no wires and longer battery life. However, network delays and packet losses can degrade control system performance, which leads us to find the optimal network configuration to minimize that impact. Another main difficulty of having wireless networks for control systems is caused by interference...
Wireless Sensor Networks (WSN) based on the IEEE 802.15.4 standard are constantly expanding. Applications like production control, building control are more and more based on WSN because of their energy efficiency, self-organizing capacity and protocol flexibility. The IEEE 802.15.4 standard defines 3 network topologies: the mesh topology, the star topology and the Cluster-Tree topology. However,...
The quality of service (QoS) in Smart Grid (SG) communications has a significant importance on emerging SG applications. Wireless sensor networks (WSNs) were considered as a compatible choice to fulfill this issue. In fact, WSNs could be widely used in a wide range of smart grid applications because they have been successfully adopted in several critical areas. Unlike other WSN applications, SG requires...
Distributed desynchronization approaches lead to time-division multiple access (TDMA) of the shared medium without requiring a central coordinator. All such methods are based on the principle of reactive listening of periodic fire messages. The advantage of distributed desynchronization (DESYNC-TDMA) is the fact that it comprises a decentralized approach of very low complexity. It is therefore of...
Wireless sensor networks collecting data to monitor real life processes gain increasing attention from the scientific community. These systems promise ubiquitous computing in a digitalized world. However many problems need to be solved to achieve this dream. One of these problems is the limited battery power of the nodes and the limited bandwidth of the communication. Existing work tackle the problem...
We address the problem of RPL tree formation in self-organized, multi-hop, wireless sensor networks, where resource-constrained nodes may independently select their routing paths that maximize their performance. We study the result of the tree formation applying a non-cooperative gametheoretic model, and show that multiple objectives may lead to unstable Nash graphs with unwanted traffic cycling....
A wireless sensor network consisting of nodes with cognitive radio capabilities is to be considered. This feature is to be used to allow these nodes, which will be considered as secondary users, to utilize dynamically another spectrum allocated to multi-channel WLAN primary users. A two-level hierarchical scheme is to be considered, with sensor nodes accessing the primary user's spectrum through a...
This paper reviews node failure detection method in ZigBee loop network. ZigBee network was popularly used for low power and low cost implementation of wireless data transmission. Node failure detection is needed in order to maintain the network reliability. Common node failure detection methods are based on ZigBee mesh networking capability. But in many application areas which have simple loop topology,...
For single sink multi-hop wireless sensor networks, the nodes close to the sink node forward the total network traffic to the sink. Hence, they exhaust their energy faster and energy-holes are formed near the sink node that reduces the lifetime of the network. To enhance the network lifetime and to reduce the packet delay, multiple sink node deployment strategies are proposed for better load balancing,...
Quasi is a combining form meaning "resembling," "having some, but not all of the features of any particular entity. We use quasi to emulate regularity in deployment of a sensor network. Most wireless networks focus on bandwidth assurances. We study the effect of network topology though effective deployment strategy to improve the energy consumption and delay metrics, essential for typical...
Software-Defined Networking (SDN) has been envisioned as a way to reduce the complexity of network configuration and management, enabling innovation in production networks. While SDN started focusing on wired networks, there were proposals specifically for Wireless Sensor Networks (WSN), but all of them required a single controller to be coupled to the sink. This paper presents TinySDN, a TinyOS-based...
Multi-hop harvested wireless sensor networks (HWSN) face two challenges. First, each node must control its energy consumption through duty cycle adaptation to spend less energy than nodes obtain from the environment. Second, nodes must efficiently adapt topology so that packets use the most efficient paths towards the sink. In this paper, we address the challenges in the specific context of beacon-enabled...
With the deepening of wireless sensor network (WSN) applied in various services in smart substation, high data rate and quality of service has become the new research focus. For smart substation equipment condition monitoring, the paper designs clustered smart substation equipment monitoring network based on wireless sensor network. Reference to Zigbee protocol and IEC 61850 relevant regulations,...
Greedy forwarding fails when a routing void is encountered in geographic routing. To solving the routing void problem, high control packet overhead and transmission delay are usually taken in wireless sensor networks. Inspired by the edge topology without routing void, an efficient bypassing void routing protocol based on virtual coordinate mapping is proposed in the paper. The basic idea of this...
The nodes near sink in wireless sensor networks are featured with heavy transmission loads, so these performance bottleneck nodes are prone to running out of energy early with shortened network lifetime. Routing tactic plays important role on transmission performance and energy consumption of network. In this paper, we enumerate typical source routing tactics in Grid topology, include 1) Random Equal...
The authors of this paper explore the use of IPv6 over Low power Wireless Personal Area Networks (6LoWPAN), IPv6 Routing Protocol for Low power and Lossy Networks (RPL) and Constrained Application Protocol (CoAP) as a possible solution for realising the Internet of Things (IOT) vision in Industrial Wireless Sensor Networks (IWSNs), The aim of this paper is to investigate the feasibility of using Internet...
With the development of industrialization and informationization, especially with the rising of Internet of Things, wireless sensor network (WSN) has being used in more and more fields. In this paper, a manufacturing Sensor Network Based on Multi-Radio and Multi-Channel (MR-MC) has been proposed. Firstly, the characteristics of the manufacturing network has been analyzed, and then state the new proposed...
In this paper, we present the results of the comparison of three reactive routing protocols for Wireless sensor networks (WSNs), AODV, DYMO and RPL. For the purpose of performance evaluation, detailed comparisons are made with AODV and DYMO. Simulations are run to estimate the network topology change, routing overhead and average packet End-to-End Delay. We simulate RPL with COOJA based on contiki...
The attractive features of wireless sensors based ZigBee and IEEE 802.15.4 standard such low cost, flexibility, scalability, and multiple usages contribute to spread it in many trends. The network of wireless sensors which is to be considered in this research deals with fixed and mobile wireless sensors and treated with mesh and tree topologies. This paper takes up the effect of Acknowledgement technique...
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