A5019599462- IoT and Edge/Fog Computing
- Context-Aware Activity Recognition Systems
- Service-Oriented Architecture and Web Services
- Wireless Communication Networks Research
- IPv6, Mobility, Handover, Networks, Security
- Blockchain Technology Applications and Security
- Cryptography and Data Security
- Smart Grid Security and Resilience
- Advanced Wireless Network Optimization
- Distributed systems and fault tolerance
- Business Process Modeling and Analysis
- Software System Performance and Reliability
- Data Management and Algorithms
- Vehicular Ad Hoc Networks (VANETs)
- Energy Efficient Wireless Sensor Networks
- Advanced Authentication Protocols Security
- Caching and Content Delivery
- Robotics and Sensor-Based Localization
- Advanced MIMO Systems Optimization
- Advanced Image and Video Retrieval Techniques
- Time Series Analysis and Forecasting
- Wireless Networks and Protocols
- Network Traffic and Congestion Control
- Software Testing and Debugging Techniques
- Physical Unclonable Functions (PUFs) and Hardware Security
Osnabrück University
2008-2024
University of Applied Sciences for Media Communication and Business
2022-2024
Hochschule Osnabrück
2013-2023
University of Fribourg
2023
Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital
2023
The University of Sydney
2023
UCLouvain
2023
Hudson Institute
2023
Ochanomizu University
2011
Ericsson (Germany)
2002-2004
Our world and our lives are changing in many ways. Communication, networking, computing technologies among the most influential enablers that shape today. Digital data connected worlds of physical objects, people, devices rapidly way we work, travel, socialize, interact with surroundings, they have a profound impact on different domains, such as healthcare, environmental monitoring, urban systems, control management applications, several other areas. Cities currently face an increasing...
In the scope of ubiquitous computing, one key issues is awareness context, which includes diverse aspects user's situation including his activities, physical surroundings, location, emotions and social relations, device network characteristics their interaction with each other. This contextual knowledge typically acquired from physical, virtual or logical sensors. To overcome problems heterogeneity hide complexity, a significant number middleware approaches have been proposed for systematic...
Future wireless systems are expected to be characterized by increasing convergence between networks and further development of reconfigurable radio systems. In parallel with this, demand for spectrum from these will increase, as users take advantage high quality multimedia services. This article aims investigate review the possibilities dynamic allocation different operating in a composite system. The first looks into current interest regulators this area, before describing some possible...
An increasing number of cities are confronted with challenges resulting from the rapid urbanization and new demands that a rapidly growing digital economy imposes on current applications information systems. Smart city enable authorities to monitor, manage, provide plans for public resources infrastructures in environments, while offering citizens businesses develop use intelligent services cities. However, providing such smart gives rise several issues, as semantic heterogeneity...
research-article Share on Challenges for Quality of Data in Smart Cities Authors: Payam Barnaghi University Surrey, Guildford, United Kingdom KingdomView Profile , Maria Bermudez-Edo Ralf Tönjes Hochschule Osnabrück, Germany GermanyView Authors Info & Claims Journal and Information QualityVolume 6Issue 2-3Article No.: 6pp 1–4https://doi.org/10.1145/2747881Published:03 June 2015Publication History 55citation1,589DownloadsMetricsTotal Citations55Total Downloads1,589Last 12 Months62Last 6...
The 3GPP release 16 integrates TSN functionality into 5G and standardizes various options for time synchronization over such as transparent mode bridge mode. domains the network are kept separate with an option to synchronize either of networks other. is possible by using IEEE 1588 generalized Precision Time Protocol (gPTP) based on UDP/IP multicast or via 802.1AS Ethernet PDUs. INET Simu5G simulation frameworks, which both OMNeT++ discrete event simulator, widely used simulating networks....
The European Union funded DRiVE project (Dynamic Radio for IP Services in Vehicular Environments) aims at enabling spectrum-efficient high-quality wireless communication a heterogeneous multi-radio environment to deliver in-vehicle multimedia services. Key issues are spectrum efficiency and dynamic allocation within different radio networks, the IPv6 based network infrastructure with inter-working of cellular broadcast as well adaptive services vehicular high degree mobility. paper gives...
Hyperledger Fabric is currently one of the most popular business Blockchain platforms. With its included functionality executing custom smart contracts, has become widely used frameworks, e.g. for industry 4.0 applications. Though, applications require a previously known data throughput. For potentially interested developer, it not trivial to decide, whether given network configuration will meet required expectations in regards performance. Thus this work shows performance analysis v2.0 and...
Since the introduction of first cryptocurrency, Bitcoin, in 2008, gain popularity distributed ledger technologies (DLTs) has led to an increasing demand and, consequently, a larger number network participants general. Scaling blockchain-based solutions cope with several thousand transactions per second or growing nodes always been desirable goal for most developers. Enabling these performance metrics can lead further acceptance DLTs and even faster systems With directed acyclic graphs (DAGs)...
Due to the rapid development of Internet Things (IoT) and consequently, availability more IoT data sources, mechanisms for searching integrating sources become essential leverage all relevant improving processes services. This paper presents search framework IoTCrawler. The IoTCrawler is not only another framework, it a system systems which connects existing solutions offer interoperability overcome fragmentation. In addition its domain-independent design, features layered approach, offering...
The 3GPP release 16 integrates TSN functionality into 5G and standardizes various options for time synchronization over such as transparent mode bridge mode. domains the network are kept separate with an option to synchronize either of networks other. is possible by using IEEE 1588 generalized Precision Time Protocol (gPTP) based on UDP/IP multicast or via 802.1AS Ethernet PDUs. INET Simu5G simulation frameworks, which both OMNeT++ discrete event simulator, widely used simulating networks....
The demand of both the new telecom industry and digital broadcasters for cost-efficient provisioning mobile multimedia services faces reality scarce radio resources. Various broadcast technologies have been developed specifically optimized. However, existing emerging exhibit challenging requirements in terms asymmetry, interactivity, real time, multicast communication. This article describes an evolution IP-based infrastructure from today's networks toward a future multi-radio...
The Internet of Things (IoT) offers an incredible innovation potential for developing smarter applications and services. However, today we see solutions in the development vertical services reflecting what used to be early days Web, leading fragmentation intra-nets Things. To achieve open IoT ecosystem systems platforms, several key enablers are needed effective, adaptive scalable mechanisms exploring discovering resources their data/capabilities. This paper discusses our work EU H2020...
With the introduction of Internet Things (IoT) into every area life, more and applications are created that rely on information collected from IoT sensors. These developed by third-party developers depend a continuous flow but do not operate sensor network themselves. However, in case failures, will be interrupted which pose problem for user/application as well data provider who might able to replace time. Depending requirements application, estimators trained through machine learning...
The presented work addresses the problem of automatic control point matching for registration remotely sensed images. inaccuracy flight parameters and sensor specific appearance objects are difficulties suffers from. To overcome these problems system uses prior knowledge to select appropriate structures matching, i.e. points, from a GIS extract their corresponding features data. is represented explicitly using semantic nets rules. best correspondence between data image found by an...
The Internet of Things (IoT) relies on sensor devices to measure real-world phenomena in order provide IoT services. readings are shared with multiple entities, such as services, other or third parties. collected data may be sensitive and include personal information. To protect the privacy users, needs protected through an encryption algorithm. For sharing cryptographic cipher-texts a group users Attribute-Based Encryption (ABE) is well suited, it does not require create keys. However,...
The Internet of Things (IoT) is growing rapidly as more and household appliances, sensors actuators are connected to the internet communicate with each other. Because these IoT devices usually have only limited processing communication capabilities, an efficient protocol required reduce overhead. Message Queue Telemetry Transport (MQTT) provides such properties. MQTT a publish/subscribe protocol, where client can subscribe message topic in order receive all messages published under that...
In sparsely populated mobile ad-hoc networks (MANETs) communication has to cope with mobility and in particular interruptions of connections. The lack continuous network connectivity is addressed by Delay Tolerant Network (DTN) protocols. DTNs are characterized varying delays the fact that a successful delivery data not guaranteed. However, today no DTN protocol functions autonomously transparently for application level available related literature. This paper introduces new approach...