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Networked systems are essential to the function of modern society and the consequences of damage to networks can be severe. Assessing the performance of a network is an important step for recovering damaged networks and designing reliable networks. Some of the key general indicators of network performance are connectivity, distance between node pairs, and number of alternative routes. We focus on...
Because of nodes mobility, one of important and fundamental issues in mobile sensor networks is how to cluster the nodes in network. The clustering is a method for best managing nodes energies, data collecting and sending information to base station and increasing network lifetime. In a wireless mobile network, the created clusters change continually and the nodes move from one cluster to another,...
A new scheme that serves to find a routing path for Wireless Sensor Networks (WSNs), with a view to facilitate an increase in the network life time is proposed in this paper. It envisages the network to be in the form of clusters and develops an algorithm for transfer of information within the nodes and to the remote Base Station (BS). The approach involves the use of Ad-hoc On Demand Distance Vector...
Wireless sensor networks can be used to deploy various applications to reflect the circumstance of environment. Video sensors used in wireless multimedia sensor networks (WMSNs) enhance such applications with multimedia data, but with specific characteristics requirement for the network. The aim of this work is to provide reliable data transport with multipath routing and load balancing congestion...
Wireless sensor and actor networks (WSANs) can be considered as a combination of sensor network and actor network in which powerful and mobile actor nodes can perform application specific actions based on the received data from the sensors. As most of these actions are performed collaboratively among the actors, so the connected inter-actor network is important to the effectiveness of WSANs. However,...
Routing in WSNs (Wireless Sensor Networks) is very challenging due to some special characteristics that differentiate these networks from other wireless networks like cellular networks, mobile ad-hoc network etc. The difference is due to scalability, careful resource management etc. Sensor nodes are generally battery powered, are expected to be remotely deployed, and operated autonomously in unattended...
In this paper we formulate and analyze a model for assessing the reliability of a wireless sensor network (WSN) based on classifying the operating states of each node at any instant into one of three possible states: a state where both the sensing and wireless modules are operating, a state where only the wireless module is operating, and a state where the wireless module is failed. Thus, in the second...
The reliable broadcast and multicast lifetime maximization problems in energy-constrained wireless ad-hoc networks are considered in this paper. In packet loss-free networks, the optimal solution of lifetime maximization problem can be easily obtained by tree based algorithms. In unreliable networks, we formulate them as min-max tree problems. A link quality-aware heuristic algorithm called MLRBT...
This paper proposes ARM, an receiver-initiated MAC protocol with duty cycling to tackle control channel saturation, triple hidden terminal and low broadcast reliability problems in asynchronous multi-channel WSNs. By adopting a receiver-initiated transmission scheme and probability-based random channel selection, ARM effectively solves control channel saturation and triple hidden terminal problems...
Anycast is a mechanism that the source node sends the data groups to the nearest sink node. The paper proposes a communication model of implementing an Anycast service for deploying several sinks in wireless sensor network. We propose a novel anycast tree-based approach to reduce the mutual interference and minimize the energy consumption. Here the nodes as the anycast node form a tree with a sink...
Scalable routing in wireless sensor network (WSN) is required for future applications to provide high-quality and robust transmission. In this paper we propose a Polychromatic Sets based scalable Routing (PSR) scheme for WSNs. PSR is a hierarchical routing scheme designed to scale to the network size. This scheme firstly partitions the network into multiple clusters which are organized as a multilevel...
The node capture attack on wireless sensor networks (WSNs) can be broken into three stages: node capture, node redeployment, and insider attacks. Existing detection techniques of the attack are mostly implemented in the second stage. Recent discovery proved the feasibility of quick and effective detection in the first stage. We propose a hello message based first stage detection scheme, which is faster,...
This study investigates the graph theoretic implications of applying collaborative rate-adaptive storage and data management to enhance the reliability of connectivity-challenged sensor networks employing dynamic heterogeneity setups. The topologies of sensor networks are synthesized through a spatially-dependent probabilistic random graph model. Around this model a degree-density-connectivity-clustering...
Wireless video sensor networks (WVSNs) have obtained popularity due to numerous potential applications such as video surveillance, environmental and habitat monitoring, etc. Transmitting video over WVSNs requires large bandwidth as well as lifetime of sensor nodes long enough to fulfill the application requirements. This paper proposes an integrated system for WVSNs (mainly used for surveillance)...
Due to the limited energy-source and mostly unattended nature of the wireless sensor networks, efficient use of energy has a critical importance on the lifetime of the applications accomplished by such networks. Although in most of the cases sensor nodes are battery-powered, there are application scenarios in which battery- and mains-powered nodes coexist. In this paper, we present an approach and...
Reliable delivery of data is a classical design goal for reliability-oriented collection routing protocols for ad hoc wireless sensor networks (WSNs). Guaranteed packet delivery performance can be ensured by careful selection of error free links, quick recovery from packet losses, and avoidance of overloaded relay sensor nodes. Due to limited resources of individual senor nodes, there is usually a...
A managed wireless mesh for infrastructure-level, stable regional mesh network has been studied. NerveNet, which we have been proposing, is a concept of future regional platform network that covers local regions and provides various context-aware services with the shared use of sensors and actuators. The managed wireless mesh developed for materializing NerveNet features auto-configuration of multiple,...
Indoor Wireless sensor networks require a highly dynamic, adaptive routing scheme to deal with the high rate of topology changes due to fading of indoor wireless channels. Besides that, energy consumption rate needs to be consistently distributed among sensor nodes and efficient utilization of battery power is essential. If only the link reliability metric is considered in the routing scheme, it may...
The use of cooperative nodes is effective for enhancing the reliability of wireless data transmission between a source and a destination by means of transmit diversity effect. However, in its application to wireless multi-hop networks, how to form cooperator candidates and then how to select cooperative nodes out of them have been rarely discussed. In this paper, we propose two selection methods of...
For the purpose of improving reliability of wireless Foundation Fieldbus (FF), we increased redundancy of the transmission path and compensated for poor communication quality of wireless communication in harsh industrial environments partly. The multi-path transmission mechanism based on wireless FF is proposed. The topology of dual-band and secondary structure based on FF is designed, and it allows...
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