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We consider a variant of the data gathering problem in sensor networks using multiple mobile elements, where each sensor must be visited with a given minimum frequency. We will construct solutions to this problem where the network is partitioned to possibly several regions, so that a single mobile element visits every node within each region. Therefore we need to partition the network and construct...
With the development of mobile code frameworks for embedded systems, an application can be structured as a set of cooperating components (agents) that are placed on the nodes of the system in a flexible way. Reducing the network traffic caused by the application components is a crucial issue for the increase in the lifetime of wireless embedded systems, since it is widely known that the communication...
Wireless technologies and applications are still undergoing rapid development. To promote new standards and scenarios to particularly small and medium-sized businesses (SME) and to boost the regional economy, a mobile transfer centre is used to transfer expertise, demonstrating wireless technologies and applications at a potential customer's site.
The position information is usually needed when wireless sensor networks are applied for surveillance within certain region. Thus the localization of nodes is critical for WSNs. However, the present localization schemes mostly focus on static sensor networks, and in mobile WSNs, these schemes will not work well. This paper proposes a range-free Monte Carlo localization algorithm TSBMCL, which is extended...
The effectiveness of wireless sensor networks (WSN) depends on the coverage and connectivity provided by node deployment, which is one of the key topics in WSN. In this paper, a modified virtual force-based node self-deployment algorithm for nodes with mobility is proposed. In the virtual force-based approach, all nodes are seen as points subject to repulsive and attractive force exerted among them,...
For the node localization of wireless sensor network, the cost of anchor nodes is very high. To reduce it, this paper adopts the idea of virtual anchor nodes, introduces the Gauss Marco's mobile model to identify the movement trajectories of virtual anchor node, and then optimize it, so that the virtual anchor node can distribute uniformly in the region detected. Combining with the centroid localization...
Coverage holes often exist in wireless sensor networks deployed with static nodes. In order to patch the holes and recover the network performance, an algorithm based on mobile nodes is presented, which guides the mobile nodes to the position of holes, and then get the resilient coverage. The static sensors bound a coverage hole can compute the optimum position for the mobile sensors which, after...
The design problems of localization algorithm, distribution density estimation and node's moving path for data collection in multi-layers mobile wireless senor network are investigated. To ensure estimating accurately the node density, this paper proposes a new movement control strategy for fusion nodes based on probabilistic coverage model. This method completed the unknown node localization through...
Opportunistic Mobile Sensor Networks (OMSN) can be applied in many scenarios where the sensor data usually need to be transmitted from the source node to one of the multiple sink nodes. We propose the DGCCF (Data Gathering based on Closeness Centrality Forwarding) algorithm, which adopts "store-carry-forward" paradigm to transmit data from sensors to the sink nodes. In DGCCF, each sensor...
In order to improve the working efficiency of airfield refueling oil operation and to reduce the working intensity of workers in airfield, an information management system for airfield refueling based on mobile WSN (Wireless Sensor Network) nodes is designed. The system consists of the circuitry design for RDTU (Remote Data Terminal Unit), hand manager for oil supply and central communication monitoring...
By the image processing and pattern recognition technology, the average background method and the Hausdorff distance method was used to video frames captured by the wireless mobile camera installed on the head of underground mine locomotive, mobile target was tracked in real-time to achieve the locomotive forward, backward and stop, judge its running track and location, calculate the recent short-range...
In most cases indoor local positioning algorithms are not effective enough. RSS-based methods are very sensitive to variations in physical environment dependent on relative positions of furniture, doors, human bodies, etc. The results of ToF-based ranging in closed areas always include additional NLOS-component. A method of combination of both RSS and ToF approaches is described. Results of conducted...
In this paper, we consider a way to deploy a wireless sensor network under the dynamic spectrum sharing. The dynamic spectrum sharing technique can help a sensor network overcome the shortage of radio resources because of getting crowded unlicensed ISM bands commonly used by it. For the purpose of this, we analyze the aggregate interference to a primary network from the sensor network as a secondary...
Wireless Sensor Networks (WSN) is a key technology of Internet of Things (IOT). WSN node is commonly powered by battery. However, battery capacity is limited, which affects the overall performance of WSN. The technology of environmental energy harvesting is presented for power supply of WSN node in this paper. Specifically, the basic voltage doubling rectifier circuit is analyzed, then the microwave...
Most Medium Access Control (MAC) protocols used in wireless sensor networks consider only static nodes. However, there is an increasing interest in sensor network applications where some or all of the nodes are mobile. In this paper, the issue of mobility in sensor networks is addressed, first at a high level, and then in terms of the additional requirements that are placed on the MAC layer by the...
Uruguay has a countrywide implementation of the One Laptop per Child (OLPC) initiative, locally named Plan Ceibal. Children participant in this project carry their laptops from home to school and back every day, enabling the creation of new applications to take advantage of computers ubiquity, mobility and wireless capabilities. In this context, we are deploying the project Domestic Environment Monitoring...
The road to a successful introduction of vehicular communications has to pass through the analysis of potential security threats and the design of robust security architecture able to cope with these threats. Ad hoc networks are a new wireless networking paradigm for mobile hosts. In this paper, we designed a framework of intelligent transport system. The main task of the road condition information...
This paper details the ongoing development of a context-sensitive InfoStation-based architecture supporting the mobile eLearning service provision within a University campus domain. A general overview of this architecture is presented highlighting the main functional entities. Issues concerning the implementation of a context-sensitive service environment within the system are also detailed, including...
A multi-agent system (MAS) is a system composed of multiple interacting intelligent agents. Multi-agent systems can be used to solve problems which are difficult or impossible for an individual agent or monolithic system to solve. In this paper, we propose a security system based on multi agents and wireless sensors to secure the buildings and faculties of a University campus.
Coverage control is one of the key problems of research and applications of wireless sensor networks. In this paper, the coverage control problem for hybrid networks which comprise both static and mobile sensors is investigated. A strategy for the discovery and determination of coverage blind spots based on Voronoi diagram is presented. For the situation that there are many blind spots in the same...
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