AG Technische Informatik


DES Testbed

With the DES testbed (Distributed Embedded Systems) we aspire to create a hybrid wireless testbed setup for long-term observations. In a first setup phase at least 50 wireless mesh routers equipped with three or more IEEE 802.11b/g NICs and an equal amount of wireless sensor nodes will be deployed. 100 nodes are planned in the final setup phase. This will enable us do experiments using non-simplistic topologies. The continuous runtime of single experiments is targeted at up to several months. ...

Dependable Systems

Welcome at the Dependable Systems Group We work on the measurement, modelling and evaluation of dependable systems. Particular focus areas are service-oriented architectures and Cloud Computing, wireless networks, and mobile telephony. We employ measurement techniques as well as discrete-event simulation and abstract stochastic modelling formalisms.   Ongoing work is coordinated through our Wiki page. Members Prof. Dr. Katinka Wolter Tian-Hui Meng Zhihao Shang Ye Na Rhee Qiushi Wang Huaming ...

Forschungsforum Öffentliche Sicherheit

Forschungsforum Öffentliche Sicherheit

Jochen Schiller

The Research Forum on Public Safety and Security started in October 2009. It aims at merging research projects and work of different disciplines and institutions that deal with “Public safety and security”. Inter- and transdisciplinary evaluations of the subject will be developed, which will generate recommended procedures for policy, economy and science. Further information.


HyperStar is a tool for fitting phase-type distributions to data sets.

I3: Information Centric Networking for the Industrial Internet


Computer Systems and Telematics

Matthias Wählisch

01.07.2016 — 30.06.2019

The I3 project will bring information-centric networks to the industrial Internet.


FU Berlin

Prof. Dr. Katinka Wolter

Unter Indoorlokalisierung versteht man die Ortung von Personen und Objekten innerhalb von Gebäuden. Während außerhalb geschlossener Räume GNS Systeme wie GPS bereits fest in den Alltag integriert sind, stellt die Ortung in geschlossenen Räumen eine Vielzahl neuer technischer und logistischer Herausforderungen dar. Im Fokus unserer Arbeit steht die distanzbasierte Lokalisierung in drahtlosen Netzwerken.


FU Berlin

Heiko Will

We introduce a simulation engine to visually evaluate and compare distance based lateration algorithms and deployments called the FU Berlin Parallel Lateration-Algorithm Simulation and Visualization Engine (LS²}. Our engine simulates a scenario which consists of given anchor positions and evaluates all positions of a playing field in parallel, instead of only randomly selected positions. At the end of a simulation run, the user is able to judge the strengths and weaknesses of the algorithm in ...

Peeroskop project


Computer Systems and Telematics

Jochen Schiller, Matthias Wählisch

 The objective of the Peeroskop project is the design and development of a system for the observational analysis of the Internet part's relevant for Germany, as well as the proactive and reactive protection of the backbone routing. Core components of the project are mechanisms for information fusion and information classification based on passive and active measurements which discover vulnerabilities in the Internet peering beforehand and bypass emerging disruptions.    



Matthias Wählisch

RIOT is a microkernel based architecture for distributed embedded systems with a strong focus on the Internet of Things and Wireless Sensor Networks. The kernel is real-time capable and supports full multi-threading. Furthermore, it provides mutexes as well as synchronous and asynchronous message passing for interprocess communication. The scheduler is priorty-based and uses a tickless timer system.

SAFEST Project Group


Jochen Schiller, Matthias Wählisch

This Franco-German project aims at a comprehensive solution to ensure the safety and security of the general public and critical infrastructures. Specifically, SAFEST addresses the problems of crowd control and area surveillance at airports. More information is available on the project homepage.



Computer Systems and Telematics

Matthias Wählisch

01.05.2016 — 30.04.2019

The overall goal of X-Check (Cross-Check) is to provide improved security for ICT-systems by leveraging data from Internet Exchange Points (IXP). X-Check designs and implements a system for the large-scale detection of (a) known security incidents and (b) novel, unconventional anomalies at central Internet nodes.

Projects — abgeschlossen

AVS Extrem

Jochen Schiller, Norman Dziengel

The German Federal Criminal Police Office (BKA) declares in 2006 a 50-percent increase of the thefts of construction sites. The financial loss for landlords and other owners of construction site equipment was estimated with approximately 90 million Euro. Therefore a flexible, spontaneously installable, economical and interface-open monitoring network is necessary. In this project the Freie Universität of Berlin investigates the possibility to establish distributed event detection in wireless ...



AppSN (Application Enablers for Rapidly Developed Sensor Networks) was the first project to start in the context of EraSME. EraSME is a co-operation between more than 20 European funding agencies running or at least planning SME-oriented programmes. The aim of the project is to foster international co-operation between SMEs and RTOs (research or technology organisations) or universities. Transnational joint projects are supported concertedly by several countries; the money comes from the ...


Jochen Schiller

01.04.2003 — 31.12.2006

The trend towards an ubiquitous computing and communication environment, pushed from the generation growing up in an information age, slowly but steadily generates a demand for ad hoc networks. A whole lot of questions are to date still open issues when talking about those kind of networks, which need to organise themsleves without any centralized entity governing access, addressing, formation, service lookup or any other function, which we take for granted in our wired, Internet driven world. ...


 DISCOURSE (DIStributed & COllaborative University Research & Study Environment) is a distributed laboratory for distributed computing featuring advanced middleware technology. The lab stretches across the four Berlin universities and is jointly installed, used and managed by seven research groups at six geographical locations. It is intended to serve as a testbed for research and as a reference platform for teaching. The research groups will include, e.g., Microsoft .NET technology in ...

Environmental Monitoring

In natural sciences, research often relies on extensive manual investigation. Such methods can be error-prone and obviously don’t scale well. The development of autonomous data acquisition systems based on Wireless Sensor Networks (WSNs) research has provides a method to significantly reduce the amount manual of work during field studies. It allows addressing of scientific questions that were previously infeasible. Our research group gathered comprehensive experience in creating robust WSN ...


01.01.2005 — 31.12.2009

Rules rule the idea of software development with FACTS: Instead of writing long imperative programs for tasking the sensor nodes of a network, a few, concise rules may let you do the same things while spending less time! Check out the FACTS homepage for more facts.


01.01.2007 — 01.09.2009

As of September 2009, research on fence monitoring and distributed event detection in wireless sensor networks continues as part of the BMBF-funded project AVS-Extrem.



01.01.2008 — 30.06.2010

Distributed tracking of fire fighters. In cooperation with Berliner Feuerwehr, Nanotron GmbH, MSA Auer GmbH, IHP GmbH and others. [more]


01.08.2008 — 31.12.2011

Flow is a Software Factory for Wireless Sensors Networks (WSNs). Software Factories are model-driven development environments. Flow allows modeling of applications for WSNs with the help of a visual editor. Flow focuses on data-centric programming. The key component is the concept of a data flow that can be used to describe how data should be processed. Domain experts use a visual Domain-Specific Language (DSL) to define data flows and thus specify the behavior of nodes in the network. With ...


01.09.2009 — 30.09.2012

This one of the projects that has been founded for the second phase of the G-Lab project ( The focus of the project is on architectures of heterogeneous wireless networks, like wireless mesh networks, wireless sensor networks, and their role in the Future Internet. Project Page. 



Jochen Schiller

12.01.2010 — 12.01.2014

"Geogrowd - Creating a Geospatial Knowledge World" aims at establishing a fertile research environment by means of a training network that will promote the GeoWeb 2.0 vision and advance the state of the art in collecting, storing, analyzing, processing, reconciling, and making large amounts of semantically rich user-generated geospatial information available on the Web. Specifically, activities will focus on (i) exploiting user-contributed geospatial data, (ii) Web-geodata management ...

M&M Gaming Project

Supporting ad-hoc mobile games is a strong challenge in the area of mobile computing. Imagine a situation, where people are equipped with smart mobile phones that communicate via short-range RF technology meet at a bus station and play an ad-hoc game while waiting for the train. Further information.


The network "MO-SIS" (mobile security systems) bundles the expertise in the areas of security and safety as well as of sensor technology and mobile communication in order to offer you the best mobile security products and services "out of one hand". It is mainly focused on self-organising (wordwide unique), robust and energy-efficient sensor networks and ad hoc networks, that are applicable anywhere and anytime. They recognise for instance vandalism and defilement in public ...


01.05.2008 — 31.05.2011

  OPNEX delivers a first principles approach to the design of architectures and protocols for multi-hop wireless networks. Systems and optimization theory is used as the foundation for algorithms that provably achieve full transport capacity of wireless systems. Subsequently a plan for converting the algorithms termed in abstract network models to protocols and architectures in practical wireless systems is given. Finally a validation methodology through experimental protocol evaluation in ...



Jochen Schiller, Matthias Wählisch

01.09.2010 — 28.02.2013

The objective of SKIMS lies in the design, development and implementation of a cross-layer security system for mobile devices. Detection mechanisms as well as a proactive and reactive defense of attacks are core components of this project. The vision of a digital immune system will be demonstrated in a proof of concept in terms of an extended security application for mobile phones. Analog to a traffic light system, the mobile signals the current level of risk to the user and relaxes the status ...


Taking an application-centric view on ad hoc networks, cooperation between devices is structured by application-level clients and servers, i.e., certain nodes requesting services provided by other nodes. This gives rise to the question in how far the performance of the network can be increased by intelligently selecting which nodes are to host a particular service. The process of identifying the appropriate nodes to act as servers is referred to as service placement and invesigated using our ...


ScatterClipse is a model-driven Eclipse-based tool chain for developing, testing and prototyping Wireless Sensor Networks. It consists of tools for application development, WSN management, WSN visualization and analysis, and application testing.Further information


ScatterWeb is a platform for self-configuring wireless sensor networks that started as research project and that already led to an awarded spin-off company. More information to the research platform can be found here: Scatterweb Homepage

ScatterWeb .NET SDK

  ScatterWeb .NET SDK is a new approach to working with wireless sensor networks. It hides the complexity of embedded programming and offers easy to handle .NET objects that represent the wireless sensors.     Key features: Sensor world available to every developer ...



01.01.2008 — 31.12.2009

TCP shall be used over a wireless link with very low data rate and high latency. The TCP-Proxy adapts TCP to the wireless medium while remaining transparent for the communicating hosts. Further Information

vive 2d_2 [Konvertiert]


Freie Universität Berlin

Prof. Dr. Jochen Schiller, Norman Dziengel

01.02.2012 — 31.05.2015

The typical task of Wireless Sensor Networks is to gather environmental data with the aim to detect application-relevant events. Such events cover a range of security relevant events from trespassing of restricted areas via critical frequencies arising on bridges through to a harmful movement during a physical rehabilitation. During observation, sensor nodes are collecting a huge amount of data that need to be transferred to a central processor. This procedure is very energy consuming and ...


The advances in development of pervasive technologies nowadays enable a seamless integration of smart health monitoring into everyday life. Small devices of roughly the size of a watch which are capable to detect critical health conditions of the person wearing it and to communicate this to a doctor or nurse in charge over a radio interface literally untie the bearer from static monitoring entities. Especially the elderly or patients still in an unstable health condition can thus benefit from a ...


01.06.2008 — 31.05.2011

  The aim of this project is to provide a multi-level infrastructure of interconnected testbeds of large-scale wireless sensor networks for research purposes, pursuing an interdisciplinary approach that integrates the aspects of hardware, software, algorithms, and data. This will demonstrate how heterogeneous small-scale devices and testbeds can be brought together to form well-organized, large-scale structures, rather than just some large network; it will allow research not only at a much ...

Web Service QoS

Web Service QoS means the QoS awareness of Web services. In a Web service environment, both service providers and service requestors should be able to specify QoS related statements to enable QoS aware service delivery, service lookup, and service consumption. QoS requirements from higher layers should be mapped to the underlying transport layer in order to enable service classification.  Further information:


01.01.2011 — 01.01.2012

 The Wi-Mesh-Lab project is focused on the extension of the DES-Testbed and development of domain specific software for application in wireless networks. The development of industrial-grade products based on scientic research is a central topic. Wi-Mesh-Lab tries to provide solutions for the Internet of the future that will consist of wired and wireless networks. Further information.



01.01.2006 — 30.09.2009

 The Freie Universität Berlin and the Berlin Police Department are cooperation partners since 2006. Within this cooperation we are evaluating secure approaches for mobile data access to police records. Further information.