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Wireless sensor networks are used in many real-time applications. Sensor nodes are deployed for a wide range of environmental monitoring applications. In order to constrain communication overhead, dense in the network, these sensor nodes are called event source. The nodes distributing queries are called the query sources. This system describes and evaluates through simulation a scheme called Rumor...
The following topics are dealt with: optical Internet; nanophotonics; green ICT; solar cells; LED; wireless mesh and sensor network; and optical switching and routing.
Sensor networks are large scale networks of low power devices that collaborate in order to perform a given task. The sensors are limited in battery energy, capacity and computational power. In recent years, researcher have proposed several protocols for such sensor networks assuming that all sensors belong the same authority. In this paper, we introduce the concept of multi-domain sensor networks...
One of the important and challenging matters in sensor network is energy of life span of nodes in the network. Node's movement, specifically movement of central node (sink) in these networks cause to increase routing updating overhead and consequently to increase power consumption and to decrease network life span. Directed Diffusion algorithm is one of methods in sensor network which is a data-oriented...
One of the important and challenging matters in sensor network is energy of life span of nodes in the network. Directed routing algorithm is one of propounded methods in sensor networks which are a data-oriented algorithm. This algorithm focuses on saving energy within life span of network nodes. One of problems of directed diffusion method is existence of multiple routes. Now, consider that some...
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,...
It is difficult to discover Walkable Path for a doctor going to the targeted patient basis in the confused calamity spot. Applying a sensor network to an emergency lifesaving system called triage which makes a lifesaving order decision is an active area of research. Although research which saves the energy and the traffic in the case of the information gathering to a sink node is done, they do not...
Energy saving and ensuring robust data collection are the big subjects in realization of wireless sensor networks. In the intermittent receiver-driven data transmission (IRDT) protocol, which aims to save energy and get high reliability, communication between nodes commences when multiple receiver nodes transmit their own IDs intermittently and a sender node receives them. In this paper, we focused...
An improved GPSR routing algorithm is proposed to resolve the energy sensing problem of GPSR. In order to balance the energy-consumption of nodes, improved GPSR routing algorithm uses node's remnant energy as one of the key factors to decide next-hop. The improved GPSR routing algorithm keeps the characteristics of GPSR algorithm, such as low complexity, easy realization. Based on NS-2, the performance...
In this paper, we firstly propose a maximum lifetime routing: the path cumulative power consumption routing(PCPC), based on the information of the two layers: medium access and routing. Secondly, a min-max optimal programming model is presented to describe the routing strategy. It aims to maximize the sensor network lifetime with minimal network power consumption by exploiting the cross-layer optimization...
An ant colony optimization-based dynamic energy efficient mobile agent routing algorithm (ADEEMA) is presented in this paper. In this algorithm, mobile agent (MA) has the character of an ant, and a novel probabilistic model is constructed to make MA can find an energy efficient route from processing node (PN) to target nodes (TN). The route considers both the energy consumption and the node residual...
In sensor network there are no nodes or servers that are exclusively responsible for packet forwarding and routing. Instead, sensor nodes participating in network communications perform these activities. Thus, they are vulnerable to the alteration and forgery of message in the process of packet forwarding and routing. To solve this problem, a security to ensure authentication and integrity of routing...
Recently, when the disaster occurred, the lifesaving emergency method that was called triage are being introduced. Purpose of triage is to decide the lifesaving order from patient's condition and to save more preventable deaths. The sensor network is constructed by using the computerized tag, and the research of the emergency lifesaving support system that observes and collects information on patient...
Wireless sensor networks are composed of a lot of sensor nodes and they are used to monitor environments. Since many studies on wireless sensor networks have considered a stationary sink node, they cannot provide fully ubiquitous applications based on a mobile sink node. In this paper, we forecasted mobile course through data communication between a mobile sink and fixed nodes and proposed plan to...
We propose partial and full link reversal algorithms to bypass voids during geographic routing over duty-cycled wireless sensor networks. We propose a distributed approach that is oblivious to one-hop neighbor information. Upon termination of the algorithm, the resulting network is guaranteed to be destination-oriented. Further, to reduce the delays incurred under reactive link reversal, we propose...
In this paper, we provide a thorough theoretical study on delivery guarantees, loop-free operation, and worst-case behavior of face and combined greedy-face routing. We show that under specific planar topology control schemes, recovery from a greedy routing failure is always possible without changing between any adjacent faces. Guaranteed delivery then follows from guaranteed recovery while traversing...
The following topics are dealt with: mobile ad-hoc network; sensor network; data management; network management; routing; localization; power awareness; energy efficiency; performance evaluation; QoS; MAC; coding application; network security; network privacy; target tracking; and performance enhancement.
Recent advances in systems of networked sensors have set the stage for smart environments which will have wide-ranging applications from intelligent wildlife monitoring to social applications such as health and elderly care service provisioning. Perhaps the most natural problem in sensor systems is the ??efficient?? propagation of a sensed local event. In order to address this problem, the notion...
Energy consumption is a major problem in wireless sensor networks (WSNs) because energy resources of sensors are limited. Several protocols have been created to solve this problem. The main objective of these protocols is to maximize the connectivity and network lifetime. Therefore, the choice of the routing algorithm that delivers packets in a wireless sensor network has to be done in a way to preserve...
Two main problems prevent the deployment of peer-to-peer application in a wireless sensor network: the index table, which should be distributed stored rather than uses a central server as the director; the unique node identifier, which cannot use the global addresses. This paper presents a multi-level virtual ring (MVR) structure to solve these two problems. The index table in MVR is distributed stored...
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