The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Energy minimization is of great importance in wireless sensor networks in extending the battery lifetime. One of the key activities of nodes in a WSN is communication and the routing of their data to a centralized base-station or sink. Routing using the shortest path to the sink is not the best solution since it will cause nodes along this path to fail prematurely. We propose a cross-layer energy...
This paper presents a simulation tool for the design and analysis of offshore ocean energy array networks. The tool integrates a number of modules which are divided into two core functions: the automation of the cable laying algorithm and subsequent creation of the network model, and the other performing the power flow analysis. The results of the power flow analysis are used to inform the user of...
Cognitive radio network (CRN) has emerged as a promising solution to solve the problem of underutilization of licensed spectrum. It allows opportunistic access of unutilized spectrum (or white spaces) by unlicensed users (or secondary users, SUs) whilst minimizing interference to licensed users (or primary users, PUs). The dynamicity of channel availability has imposed additional challenges for routing...
The Routing Protocol for Low-Power and Lossy Networks (RPL) is the standardized routing protocol for constrained environments such as 6LoWPAN networks, and is considered as the routing protocol of the Internet of Things (IoT), However, this protocol is subject to several attacks that have been analyzed on static case. Nevertheless, IoT will likely present dynamic and mobile applications. In this paper,...
Virtual Coordinate (VC) based algorithms do not use physical coordinates for addressing, and thus possess many advantages for large scale sensor networks. They rely on the validity of VCs of nodes. VCs are affected by events such as node failures which are unpredictable and inevitable in WSNs. This degrades the performance of the algorithms and may even reduce overall life of the network. A distributed...
In current trends without preexisting infrastructures, Mobile ad-hoc networks (MANETs) are a specific kind of wireless sensor networks which are quickly adopted. Collaborative, medical, military or embedded applications are some of the different types used here. Large number of nodes is used at the large scale of network when MANETs provides new challenges where many clustering algorithms are mitigated...
A wireless sensor network is a group of devices that uses radio to monitoring and sensing physical or environmental conditions at different location. Commonly monitored parameters are pressure, temperature, humidity, wind direction and speed, sound intensity, power-line voltage, and chemical concentrations. However, Energy efficiency is an essential design issue is a challenging task. In this simulation...
Cognitive Radio (CR) is viewed as a revolutionary potential radio technology capable of offering dynamic spectrum access. CR Networks (CRNs) with such spectrum aware devices is a hopeful solution to the spectrum scarcity issue in wireless communication sector. In this paper, an effective routing solution with a cross layer design is proposed for the multi-hop CRNs. Most of the existing work uses Ad-hoc...
Mobile Ad hoc Network (MANET) is a collection of wireless mobile nodes which are autonomous, self organized and dynamic in nature. In this network due to mobility nodes are moving randomly, resulting in topology change. This topology change leads to frequent breakage of link. To repair the broken link AODV and DSR uses broadcasting mechanism. Broadcasting floods control packets. Flooding results in...
A novel clustering approach for cognitive nodes in CRN based Ad Hoc Networks (CRAHNs) is proposed in this paper. The Signal to Interference plus Noise Ratio (SINR) produced by Primary Users (PUs) on collocated Cognitive Users (CUs) along with Expected Transmission Time (ETT) among CUs is taken into account in order to form the clusters. The operation of CUs, either during cluster formation or data...
Mobile Ad Hoc network(MANET) is infrastructure-less, self-configurable and multi hop wireless network that has dynamic topology. Clustering in MANETs is a hierarchical aspect of dividing the network into various groups of nodes called Clusters, which leads to reduction in message overhead generated during topology maintenance. The proposed scheme provides efficient and improved cluster management...
To solve the problem of congestion which often occurs in the process of the large data transmission in large-scale wireless senator networks, a multipath routing protocol based on congestion control mechanism implemented by cross-layer design concept is proposed. Realizing the multipath routing protocol on the basis of AODV protocol, congestion control mechanism with active congestion avoidance, real-time...
In many sensor network applications, messages are perciodically flooded through the network. Routing protocols also depend on such flooding for their functioning. Establishment of a connected dominating set (CDS) helps in reducing the cost of such operations. We propose a robust distributed algorithm for setting up a CDS and maintaining the CDS under a variety of node and link failures. We compare...
Modelling is a general method used throughout the development of systems. Numerous modelling languages were proposed for analyzing and building systems. Petri Nets language is considered as one of the formal modelling and analysis techniques. These techniques allow users to do both the performance evaluation and model checking. Coloured Petri Nets (CPN) is one of the modelling languages especially...
The combined network design and (distributed) traffic routing problem can be formulated as a large-scale multi-period mixed integer optimization problem. This problem combines network design decisions and routing decisions, with time-dependent demands. In [1], we proposed a compact formulation based on the aggregation of flows by destination. We observed that its resolution on realistic instances...
The performance evaluation of Mobile Ad Hoc Network (MANET) routing protocols is an important as well as open area of research worldwide. Temporally Ordered Routing Algorithm (TORA) is an adaptable and distributed MANET routing protocol which is dependent on the services of Internet MANET Encapsulation Protocol (IMEP) for its various necessary functions like link status detection. The incorrect link...
This paper focuses on data replication in structured peer-to-peer systems over highly dynamic networks. A Q-learning-based replication approach is proposed. Data availability is periodically computed using the Q-learning function. The reward/penalty property of this function attenuates the impact of the network dynamism on the replication overhead. Hence, the departure of a node does not necessarily...
Survivability is a critical issue in high-capacity wavelength division multiplexing based optical networks, since even a disruption for a very short time could result in the loss of a large amount of data. Each accepted connection request brings revenue to the network. On the other hand, a service level agreement (SLA) requirement (e.g., 99.9% uptime in terms of availability) is associated with a...
The combined network design and (distributed) traffic routing problem can be formulated as a large-scale multi-period mixed integer optimization problem. This problem combines network design decisions and routing decisions, with time-dependent traffic demands. In this paper, we consider different branch-and-cut strategies for solving the problem with the base and extended formulations proposed in...
The goal of wireless sensor networks is the maximum data gathering. Factors like energy, memory, bandwidth and processing capability affects the characteristics of the network which implies in reduced data collection. To avoid the reduction in data collection, mobile sensor nodes are used. They cover large area in short time and these networks are called as mobile wireless sensor networks (MWSN)....
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.