Inst. Telekommunikationssysteme

179 Items

Recent Submissions
MAC Based Dynamic VLAN Tagging with OpenFlow for WLAN Access Networks

Koerner, Marc ; Kao, Odej (2016)

Many network device vendors are providing a vendor specific VLAN based access solutions for WLAN clients. This applications allows network operators to specify WLAN devices which automatically fall into their department specific networks ans allows them to access their local resources like e.g. printers. The configuration of these VLAN mappings is usually manufacturer specific and depends also ...

A System Architecture for Real-time Anomaly Detection in Large-scale NFV Systems

Gulenko, Anton ; Wallschläger, Marcel ; Schmidt, Florian ; Kao, Odej ; Liu, Feng (2016)

Virtualization as a key IT technology has developed to a predominant model in data centers in recent years. The flexibility regarding scaling-out and migration of virtual machines for seamless maintenance has enabled a new level of continuous operation and changed service provisioning significantly. Meanwhile, services from domains striving for highest possible availability – e.g. from the tele...

A Framework for Handling Heterogeneous M2M Traffic

Elmangoush, Asma ; Corici, Andreea Ancuta ; Steinke, Ronald ; Corici, Marius ; Magedanz, Thomas (2015)

Sensors, actuators and devices that compose the Internet of Things (IoT) world are becoming more diverse every day in terms of capabilities and amount of generated traffic. Current Machine-to-Machine (M2 M) communication standardization efforts try to formalize the interfaces between M2 M nodes based on the perspective of exchanging uniform small data size with low sampling rate only. However, ...

An extensible and customizable framework for the management and orchestration of emerging software-based networks

Carella, Giuseppe Antonio (2018)

The 5th Generation Mobile Telecommunications (5G) is supposed to drastically change network operators’ infrastructures. The evolution of telecommunication networks has always been influenced by the parallel evolution within the Information and Communication Technology (ICT) domain. What started with intelligent networks in the 90’s, namely the centralization of service programs and data in cen...

Information extraction from high-level activity diagrams to support development tasks

Beckmann, Martin ; Karbe, Thomas ; Vogelsang, Andreas (2018)

As the complexity of systems continues to increase, the use of model-driven development approaches becomes more widely applied. One of our industry partners (Daimler AG) uses UML activity diagrams as the first step in the development of vehicle functions, mainly for the purpose of communication and overview. However, the contained information is also valuable for further development tasks. In t...

Evaluation of a specification approach for vehicle functions using activity diagrams in requirements documents

Beckmann, Martin ; Vogelsang, Andreas (2017)

Rising complexity of systems has long been a major challenge in requirements engineering. This manifests in more extensive and harder to understand requirements documents. At the Daimler AG, an approach is applied that combines the use of activity diagrams with natural language specifications to specify vehicle functions. The approach starts with an activity diagram that is created to get an ea...

What is a good textual representation of activity diagrams in requirements documents?

Beckmann, Martin ; Vogelsang, Andreas (2017)

The use of graphical models has become a widely adopted approach to specify requirements of complex systems. Still, in practice, graphical models are often accompanied by textual descriptions to provide more detail, because of legal considerations, and to enable stakeholders with different backgrounds to understand a requirements document. One of our industry partners (Daimler AG) uses activity...

Removal of redundant elements within UML activity diagrams

Beckmann, Martin ; Michalke, Vanessa N. ; Vogelsang, Andreas ; Schlutter, Aaron (2017)

As the complexity of systems continues to rise, the use of model-driven development approaches becomes more widely applied. Still, many created models are mainly used for documentation. As such, they are not designed to be used in following stages of development, but merely as a means of improved overview and communication. In an effort to use existing UML2 activity diagrams of an industry part...

Coexisting graphical and structured textual representations of requirements

Beckmann, Martin ; Reuter, Christian ; Vogelsang, Andreas (2018)

[Context & motivation] Many requirements documents contain graphical and textual representations of requirements side-byside. These representations may be complementary but oftentimes they are strongly related or even express the same content. [Question/problem] Since both representation may be used on their own, we want to nd out why and how a combination of them is used in practice. In conseq...

A case study on a specification approach using activity diagrams in requirements documents

Beckmann, Martin ; Vogelsang, Andreas ; Reuter, Christian (2017)

Rising complexity of systems has long been a major challenge in requirements engineering. This manifests in more extensive and harder to understand requirements documents. At the Daimler AG, an approach is applied that combines the use of activity diagrams with natural language specifications to specify system functions. The approach starts with an activity diagram that is created to get an ear...

On improving privacy and security through user-informed design

Piekarska, Marta (2018)

What is Privacy? It is "a state in which one is not observed or disturbed by other people''. Or at least that is what Oxford Dictionary of Modern English provides us with. However with the state of "disturbance'' or "observation'' today, it may be a little hard to define. Let's take the term "disturbance''; the way we interpret a behavior as annoying or unsolicited varies from individual to in...

Enhanced location information and its application for improving wireless networks

Lemić, Filip (2018)

A highly desired feature of next-generation wireless networks is their contextual awareness, in which location information of mobile and nomadic devices arguably plays the most critical role. On one side, location information is used as underpinning to user-facing location-based services and, on the other, it shows significant potential as a driver for optimization of core aspects of the underl...

Multi-channel RSS measurements on TWIST

Ergin, Mustafa Onur (2018-02-01)

Internet of Things (IoT) systems, including Wireless Sensor Networks (WSNs), are getting integrated into virtually all aspects of life faster than before. These systems are used from agricultural monitoring and actuation to manufacturing plants. Such wireless networks play a critical role in home and health applications as well as security and asset tracking. The knowledge of physical position ...

Relative node position discovery in wireless sensor networks

Ergin, Mustafa Onur (2018)

Die Geschwindigkeit, mit der sich Internet-of-Things (IoT) Systeme, wie z.B. kabellose Sensornetzwerke (Wireless Sensor Networks - WSN) in nahezu allen Bereich des täglichen Lebens ausbreiten steigt rasant an. In der Landwirtschaft und der Industriellen Fertigung werden durch solche Systeme zunehmend Monitoring Anwendungen realisiert. Smart-Home und Gesundheitsapplikationen werden durch sie übe...

Filling disocclusions in extrapolated virtual views using advanced texture synthesis methods

Koeppel, Martin (2017)

Stereoscopic Three Dimensional (3-D) video technologies have been established in the mainstream. Many cinemas already show movies in 3-D. Due to the higher visual information, 3-D video technology is increasingly used in other application areas, e.g. medical and logistical applications. However, the need to wear additional glasses to create a 3-D impression for the viewer is regarded as a major...

Elastic and dynamic orchestration of service function chains for 5G networks

Hassan, Ahmed Mohamed Medhat Mohamed Ahmed (2017)

As the telecommunication community moves towards the 5th Generation Mobile Networks (5G), Softwarized Networks are leading the way to a radical development in the Network Operators' infrastructures. New emerging technologies such as Network Function Virtualization (NFV) and Software-Defined Networking (SDN) are the key enablers for managing on-demand resources in softwarized networks. Focusing ...

Measurement, characterization and modeling of millimeter-wave channels

Peter, Michael (2017)

Wireless communication and networking have become an important part of our daily lives. New standards and devices promise higher data rates, lower latency and higher reliability. However, there is consensus that the currently used frequency bands below 6 GHz will be insufficient to meet rate requirements of future applications and the growing number of devices. Therefore, the use of frequency r...

Radio over fibre techniques for backhaul and fronthaul

Gomes dos Santos, Jessé (2017)

The 5th generation of the mobile network, foreseen to work commercially from 2020, promises to offer significant improvements when compared to previous mobile generations. Among these advances, the minimum experienced user throughput in uplink 50 [Mbps] and downlink 100 [Mbps] stands out. Such new requirements will lead to an exponential growth of aggregation network traffic. To address such th...

REBECA – eine autonome Publish/Subscribe Middleware

Parzyjegla, Helge ; Graff, Daniel ; Schröter, Arnd ; Schepeljanski, Alexej ; Busse, Anselm ; Richling, Jan ; Werner, Matthias (2011)

null

Emergence in user experience and quality of service for Internet of Things

Yen, Neil Y. ; Kao, Odej ; Jiang, Hai ; Hung, Jason C. (2015)

null