Sebastian Subik

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In emergency situations like an attack on a building, public networks are not sufficiently reliable. Hence field forces, who want to share multimedia mission information, have to build up their own multi-hop wireless network. To build up these ad hoc networks, battery driven wireless nodes with meshing capability, called dropped units, present a new(More)
The interoperability of the data sharing across different organizations is key for the efficient management of large-scale incidents. The system introduced in this paper will provide multi-disciplinary rescue teams with an integrated and intelligent communication and information system for efficient data sharing and emergency process management before,(More)
With the IEEE 802.16e standard for Mobile WiMAX the course for new 4G mobile radio communication systems is set. It offers significantly higher data rates than GSM or WCDMA/UMTS and supports different handover mechanisms and QoS features in contrast to WiFi (IEEE 802.11g) on the OSI-layer 2 (L2). Since WiMAX-devices are hardly available today and protocol(More)
In this paper, the authors present a novel solution for the integration of TETRA-based PMR and IP based wireless broadband networks through a novel inter-system interface. This solution enables secure group communications based on PMR standards using heterogeneous devices ranging from a traditional PMR device to smart phones such as the iPhone. Thereby a(More)
In this paper, the authors present a proof-of concept demonstrator for an adaptive inter-system-interface gateway between LMR and IP based networks. To underline the flexibility of the proposed solution, a satellite link is utilized to enable the integration of an independent LMR cell or direct connected terminals (MicroSpot) into an existing infrastructure(More)
Satellite services (e.g. Internet-over-Satellite or GPS) are getting more and more important in our lives, whereby the operational area is still growing. To guarantee those services, reliable simulation tools are necessary to scale and validate actual and future satellite systems. Therefore, this paper gives an overview about development, functionalities(More)
In this paper, the authors present a study of a network fingerprinting classification using monotone multilayer perceptron neuronal networks. It is part of an overall performance engineering approach. The classification is used to increase the performance of an active queue management on the quality of service for a next generation public safety(More)
As the basis of Next Generation Public Safety Communication (PSC) systems for critical group communication, 4G (LTE) technologies have been chosen from the different stakeholder. Existing 2G and 3G equivalent technologies are and will be used to allow for a sufficient network coverage. Due to the long investment cycles within the public sector, for a long(More)
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