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Safety critical applications of IEEE 802.15.4 networks require autonomous network reconfiguration and dynamic meshing in case of node failures or changing environmental influences. In contrast to the classical approach of wireless sensor networks, this paper focuses on the development of enhanced network services like multimedia transmissions in a gas concentration monitoring scenario. Therefore,...
Multimedia group communication services in mobile networks as a replacement for traditional trunked radio communication have attracted a lot of attention recently. This paper presents results from a newly developed simulation model to study the transfer of multimedia streams in group communication systems within different setups. As the real time ability of such a system has been identified as the...
The European satellite navigation system Galileo is ready for service in the year 2013. New services are needed to be investigated to enlarge the capabilities of the system. In this paper we propose a Galileo Search and Rescue Short Message Service (Galileo SAR-SMS) to enable sparse text communication between endangered persons and rescue forces to optimize the process of retrieval. Galileo SAR is...
For clarification, containment and combat of large danger areas, fast and flexible survey of potentially contaminated areas is an emerging challenge. In this paper we present a project that focuses on incidents, that are caused by uncontrolled emissions of liquid or gaseous contaminants (e.g. explosive or toxic gases or liquids, biological, chemical or nuclear weapons). Instead of sending specially...
The European satellite navigation system Galileo is a highly promising technology with communication capabilities providing an enhanced search-and-rescue (SAR) service in combination with the current Cospas-Sarsat system. Our development focuses on a high reliable hybrid communication infrastructure for wide area fire fighter missions. The combination of a terrestrial network infrastructure and the...
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