Michael Baar,
Integration of Wireless Sensor Networks in Trunked Radio Systems,
Department of Mathematics and Computer Science, Freie Universität Berlin and Networks \& Enterprise, TETRA Subscriber NextGen Engineering, Motorola GmbH, 6 2007.

Abstract: Autonomous networks of small embedded computers equipped with modern, miniaturized sensors and wireless communication system open new ways for information‐gathering. Placed in numbers of hundreds or thousands they collect data and delivered it to their owner. Use case are manifold. They cover extensive, yet detailed, mesh networks for environment studies as well as monitoring of large droves or body functions of a single person. Digital trunked radio is on it’s way to replace existing analogue professional mobile radio systems. New features like direct‐ and group‐calls as well data‐services become possible. The TETRA digital trunked radio system has been standardised by the European Telecommunication Standards Institute (ETSI). Unlike existing digital radio solutions TETRA terminals and infrastructure of different manufacturers can be used in combination. A large group of potential users in the commercial sector are industry and conveyances. The largest and most demanding user group are the public authorities. The integration of sensor networks into digital trunked radio enables new sensornetwork‐based applications for these (potential) users. The common task of all these applications is the collection of data in a distant environment. In this master thesis a number of possible use cases for sensor networks in the sphere of trunked radio users are presented. Besides building‐automation and industrial usage the main case is the use in security critical facilities and the use by public relief services. Main applications are early hazard detection and support for disaster site exploration. After an introduction of the technical basics the core requirements for this kind of application are analysed. In combination with the technical restrictions a system model is developed and different ways of realisation are discussed. The abstract application is then refined into a prototype which shows the feasibility of a configurable system for information transport between a sensor network and an operator station connected to a digital trunked radio network. For the prototype the ScatterWeb sensor network of Freie Universität Berlin and the TETRA trunked radio implementation by Motorola GmbH are used. To connect both networks a gateway is designed and implemented. For the overall application a concept for configurable information transport in sensor networks is designed and realised. The main concepts and structures are explained along diagrams.


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