Conference Paper

Realistic Mobility Aware Information Gathering in Disaster Areas.

Osaka Univ., Suita
DOI: 10.1109/WCNC.2008.570 Conference: WCNC 2008, IEEE Wireless Communications & Networking Conference, March 31 2008 - April 3 2008, Las Vegas, Nevada, USA, Conference Proceedings
Source: DBLP


In this paper, we propose a method for realistic mobility aware information gathering in disaster areas. In the proposed method, a disaster area is divided into a grid, and each node's safety information is held in its pre-defined home grid cells, and it can be referred by sending a query to mobile nodes in its home cells. In this paper, we propose an autonomous adaptable protocol so that it can adapt to a variety of realistic network environments. In order to achieve speedy and high propagation, we combine the notions of store/forward in opportunistic networks and geographical routing in MANETs. In the proposed protocol, if intermediate nodes cannot relay safety information to its home cells by multi-hop communication, they hold it until they meet preceding nodes and re-transmit it as proxies. If a shortest path is not available, a detour is autonomously found. We have evaluated the proposed method under realistic pedestrian flows using our network simulator MobiREAL, and shown that it can work well.

Download full-text


Available from: Akira Uchiyama, May 19, 2014
8 Reads
  • [Show abstract] [Hide abstract]
    ABSTRACT: With the advance of ubiquitous computing and ambient intelligence, several thousands of sensors and mobile devices can collaborate with each other in order to collect sensing information in wide areas and distribute location-aware information in real-time. In urban districts, several types of ubiquitous applications will be deployed and used in parallel in near future. It is known that reliability and performance of such ubiquitous applications are strongly affected by node mobility, fluctuation of node density, data transmission mechanisms (protocols), and so on. Therefore, in order to design and deploy such ubiquitous applications in urban districts as societal systems, we must anticipate the behavior pattern (mobility) of pedestrians and vehicles in those areas and develop resilient design methodology for high-reliable deployment and management of ubiquitous devices in underlying wireless communication environments. Intellectual management of a large amount of sensing information in mobile wireless Internet environments is also becoming important. Here, we focus on large-scale mobile wireless ubiquitous systems in urban districts as complex software-intensive systems, and discuss about research challenges for their design and deployment.
    11/2008: pages 116-131;
  • [Show abstract] [Hide abstract]
    ABSTRACT: When a large-scale disaster strikes, situational awareness over the disaster area is important because first responders need timely and accurate information for disaster relief. However, the communications infrastructure is usually unavailable thus a mobile ad-hoc network is utilized to gather critical information by using the mobile phones of people in the disaster zone as sensing nodes. In this paper, a content-based image prioritization technique in delay tolerant network is proposed to achieve fast collection of images with high priorities. Geotagged disaster images are collected by the users and are assigned priorities based on their content through image processing using OpenCV. A preinstalled mobile application on the users' phones detects critical content (e.g., fires, road blocks) in the images. The detected images with critical content are sent over the network faster than images with noncritical content in order to address the critical events immediately. Through testing and computer simulation, we confirmed that the proposed method with image prioritization achieved a higher percentage of received images with critical content corresponding to a smaller delivery latency than without image prioritization.
    2014 Seventh International Conference on Mobile Computing and Ubiquitous Networking (ICMU); 01/2014