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Network

In this group, sensors are used to collect data from the field such as locational data. In the other hand, simulation has carried out the real world scenarios.

Demonstration of research

  • Ad-hoc network for earthquake disaster

    An ad-hoc network is used to support P2P communication by wireless communication; we are applying this research as an emergency network in the event of a disaster such as an earthquake. In ad hoc network, even if the infrastructure function is failed due to a power failure, battery-powered communication equipment can used to maintain the network by direct communication. Currently, we are considered to be able to use the home server of the smart home system to the construction of ad-hoc network. Apart from that, we are developing a rescue support system of victims utilizing the present network.


  • iBeacon-indoor location service

    Beacon is wireless communication services using Bluetooth Low Energy (BLE). We place several iBeacons in indoors and the distance between the iBeacons is calculated by RSSI (Received Signal Strength Indication) from the smartphones. Using iBeacons, we are developing indoor navigation system.


  • Network simulation

    By using a network simulator such as ns-3 , ns2, One Simulator, to save energy of sensor network battery, simulation is carried out to know how to share the location data efficiently. In the case of large area, it is difficult to process with large number of devices, so it is necessary to carry out simulation

Demonstration of development

  • Usage of sensor

    The touch-tag sensor is used to know the availability of person in the room. Utilizing iBeacon for the indoor positioning, find the location information and the moving location of people.


  • Assistance during disaster

    System will be developed in order to help the people in rescue and evacuation by showing the location of evacuation centers, safe places and safe roads etc.


  • Network simulation

    The experiments carried out in the real field will be time consuming and cost consuming to decide some of the parameters. In that case network simulation has been carried out to estimate those parameters.


    Figure above shows the screen shot of simulation viewer by ns-3.

Demonstration of research and development environment

  • Eclipse

    We have created application using java language with integrated development environment (IDE) called Eclipse. The layout of the screen is also visually easy to understand, you can custom the operation screen of preference.
    Also Eclipse is very important tool to develop smoothly by ns-3 and One Simulator.


  • Nexus7, OpenBlocks

    We are developing application to share location information of impassable places for the purpose of tsunami evacuation experiment by using Nexus7 and OpenBlocks.


  • iBeacon

    The iBeacon is a technology using the Bluetooth Low Energy (BLE). BLE is has a feature that the existing Wi-Fi and Bluetooth is less likely to interfere with others.


  • ns-3, OMNeT++

    ns-3 is a discrete-event network simulator for Internet systems, targeted primarily for research and educational use. ns-3 is free software, licensed under the GNU GPLv2 license, and is publicly available for research, development, and use. OMNeT++ is an extensible, modular, component-based C++ simulation library and framework, primarily for building network simulators. OMNeT++ simulations can be run under various user interfaces. Graphical, animating user interfaces are highly useful for demonstration and debugging purposes, and command-line user interfaces are best for batch execution.


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Research activities in AL-lab are divided mainly into three groups:

Grid

Network

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