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Aamir Mahmood, Konstantinos Koufos, & Krisztina Cziner. (2008). Multicast voice performance within a public safety cell. In B. V. de W. F. Fiedrich (Ed.), Proceedings of ISCRAM 2008 – 5th International Conference on Information Systems for Crisis Response and Management (pp. 18–24). Washington, DC: Information Systems for Crisis Response and Management, ISCRAM.
Abstract: In public safety communications the first responders are getting directions about the tactical action plan with multicast voice whereas they can report back to the dispatcher with unicast voice. In this paper, the aim is to find the maximum number of voice calls for situation reporting in the presence of multicast voice for tactical coordination. In order to increase the reliability of our analysis we verify our simulator against a test bed prototype consisting of three 802.11 terminals. The simulation study is applied within a mobile cell. The proposed mobility model applies for initial deployment in emergency scenarios. We investigate the statistical properties of the model by simulations.
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Delia Berrouard, Krisztina Cziner, & Adrian Boukalov. (2006). Emergency scenario user perspective in public safety communication systems. In M. T. B. Van de Walle (Ed.), Proceedings of ISCRAM 2006 – 3rd International Conference on Information Systems for Crisis Response and Management (pp. 386–396). Newark, NJ: Royal Flemish Academy of Belgium.
Abstract: In the area of emergency response communication technologies, consideration of organization structure is critical in order to begin the understanding of user needs and optimize the development of effective technologies. User studies were carried out during the Wireless Deployable Network System European project-WIDENS. This paper discusses the information flow and spatial distribution of different European organizations involved in emergency response for various large-scale scenarios. The paper presents the operational view of emergency situation and related communication flows in several countries. Key results revealed that similarities exist in organizational roles, holding specific responsibilities in terms of location and task. Hierarchical arrangements and information flow may also be similar. However, difficulties lie in the efficient transmission of information due to slow information flow. Spatial distribution of personnel varies for scenarios. Future European studies are recommended for the advancement of our understanding of these newly addressed issues in public safety communication technologies and the needs of users in Europe.
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Konstantinos Koufos, Krisztina Cziner, & Pekka Parviainen. (2007). Multicast video performance evaluation for emergency response communications. In K. Nieuwenhuis P. B. B. Van de Walle (Ed.), Intelligent Human Computer Systems for Crisis Response and Management, ISCRAM 2007 Academic Proceedings Papers (pp. 595–604). Delft: Information Systems for Crisis Response and Management, ISCRAM.
Abstract: Group-oriented services including data dissemination, group calls and real-time video transmission are considered as an important application in public safety communications. The main interest is in one-way real-time video transmission from the hot spot to multiple recipients. This is important for efficient emergency response. The changing topology of the multi-hop communication links in a public safety environment makes routing and multicasting extremely challenging task. The purpose of this paper is to study the performance of wireless mobile ad-hoc networks with one-way multicast video traffic. To consider a realistic public safety scenario, the effect of extensive unidirectional links is investigated. The system performance study of various ad-hoc network configurations is done by simulations. For wireless multicast routing, the On Demand Multicast Routing Protocol is used. The performance results are compared with the requirements provided by Statement of Requirement document of standardization project MESA.
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