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6LoWPAN enables IoT and WSN devices to connect to the Internet. The traffic caused by this increase of machines connecting to the Internet can overwhelm networks, leading to congestion. SDN, with its architecture that decouples the control plane from the forwarding plane, provides novel ways of dealing with network congestion as it allows easier manipulation of the network and its traffic flow. Taking...
Wireless Sensor Network (WSN) having a small sensor suffers from limited computational and communication power. These sensors are deployed randomly and sparsely in the network. One of the major problems occurring in such environment at the time of deployment is the formation of holes in the network. The hole is a communication gap, which affects the general performance of the network. An improved...
Nowadays, natural disasters become more and more frequent. In this paper we propose a communication for flood disaster scenario. In our system, nodes can directly demand a specific type of data without knowing its source. Our approach differs from classic Content Centric Network one by allowing to establish a direct communication with groups of nodes. A group of nodes to contact is identified by its...
With WSN technologies becoming more reliable, sophisticated and more capable of meeting the demands of market opportunities and with its broad applications and new emerging trends like: internet of things and integrated web-based services, there still a need for developing protocols to manage and improve coherence and consolidation of the network. Video sensing can be involved in most of the WSN applications...
Wireless sensor networks (WSN) provide attractive solutions for data exchange in a variety of applications from military surveillance to medical and environmental monitoring. The commonality in all such applications is that the data collected in some nodes of the network is needed at some other nodes, for instance in a data collector node. The nodes are typically limited in terms of power, memory,...
We consider wireless sensor networks (WSN) powered by energy harvested from the environment, which is assumed to be sporadic and random in nature. Wireless nodes in such networks experience random active and sleep periods depending on their energy availability, leading to intermittent connectivity in the network. This paper addresses the problem of minimizing the multi-hop transmission delay in such...
In recent years, home ICT services have been actively proposed. To realize the services, power consumption of sensor station increases when a sensor station often wakes up to report sensor data. In this paper, we proposed an application-aware power-saving control method for sensor stations and confirmed an effect of a proposed method which is constructed as OSGi bundle in HGW. By using the proposed...
In this paper we present a distributed self organizing trust based clustering framework for securing ad hoc networks. The mobile nodes are vulnerable to security attacks, so ensuring the security of the network is essential. To enhance security, it is important to evaluate the trustworthiness of nodes without depending on central authorities. In our proposal the evidence of trustworthiness is captured...
Wireless sensor Networks (WSNs), is one of the most rapidly growing scientific domain. This is because of the development of advanced sensor nodes with extremely low cost One of the characteristic feature of WSNs compared to the traditional wireless communication networks to reduce “delay” in such networks we introduce replication or “spraying” methods that can reduce the overhead of flooding-based...
Duty cycling and energy effective techniques are employed frequently in order to prolong network lifetime in WSNs. In recent studies, dynamic duty cycle schemes are also adopted with the use of asynchronous MAC protocols. In this work, we have studied fault tolerance in multi-sink WSNs. We introduced a geographic forwarding technique in order to prevent packet loss due to node failures by employing...
Dense and large scale Wireless Sensor Networks (WSNs) require strategies for data gathering with efficient, scalable, robust, large area coverage, and extended network lifetime attributes. We propose a novel and efficient data gathering algorithm, EDGS, to collect data in these challenging WSNs. EDGS creates virtual network backbone based on regular graph structure called the Gray Cube. Several short...
Heterogeneous wireless sensor network (HWSN) consists of sensor nodes with different ability, such as computing power and sensing range. Compared with homogeneous wireless sensor network, the design of protocols for such networks has to be more complex due to the energy constraint in order to prolong the lifetime of the network. As energy consumption mostly comes from the radio transmissions, bandwidth...
Wireless sensor network (WSN) is made up two or more interconnected sensor nodes wirelessly. These nodes may be deployed either in open or closed environment. As these nodes communicates wirelessly and deployed in open environment there are always threat of security of nodes as well as data communicated. In order to making secure communication over WSN there should be some security mechanism. In this...
The deficient energy supplies of wireless sensor networks (WSNs) drives network designers to optimize energy consumption in various ways. Not only with regard to the energy issue but also with respect to system performance, we design a local search technique for sink placement in WSNs that tries to minimize the maximum worst-case delay and extend the lifetime of a WSN, simultaneously. Since it is...
This papers proposes a novel climate control strategy for mine extraction rooms based on the receding horizon optimal control scheme. Being a model-based procedure, the development of a pertinent prediction model is one of the keystones. According to recent technological advances, we consider that distributed measurements are available and provided by a wireless network. An enhanced modeling approach,...
A problem of stabilization of cluster unit in wireless sensor and actor network is discussed in this paper. Through modeling WSAN (wireless sensor and actor network) as a new multiple input single output model, this problem is transferred to stabilization of multi-sensor and single controller system with long but bounded multiple random time-delay and packet-loss. Using theories of jump linear system,...
Sink mobility has become an increasingly important requirement of various sensor network applications. Handling such mobile sink conditions brings new challenges to large-scale sensor networking. This investigation proposed a hybrid-structure routing protocol (HSRP) that combines the benefits of grid-based and cluster-based structures. Grid-based structure is designed to solve the cluster head selection...
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