Ralf Steinmetz
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Enabling Information Transmission in Low-Throughput Wireless Channels for Aerial Disaster Monitoring Systems Open
The utilization of Unmanned Aerial Vehicles (UAVs) for disaster relief has significantly increased in recent years, especially in the fields of aerial monitoring and communication support. At the same time, research on wireless communicati…
Dynamic Monitoring Area Allocation for Aerial Post-Disaster Situation Monitoring Open
In the aftermath of a disaster, information about the location of affected civilians is very important for an efficient disaster relief. A continuously operating autonomous Aerial Monitoring System with Unmanned Aerial Vehicles (UAVs) can …
Towards QoE-Driven Optimization of Multi-Dimensional Content Streaming Open
Whereas adaptive video streaming for 2D video is well established and frequently used in streaming services, adaptation for emerging higher-dimensional content, such as point clouds, is still a research issue. Moreover, how to optimize res…
View article: User Space Packet Schedulers: Towards Rapid Prototyping of Queue-Management Algorithms
User Space Packet Schedulers: Towards Rapid Prototyping of Queue-Management Algorithms Open
Quality of Service indicators in computer networks reached tremendous importance over the last years. Especially throughput and latency are directly influenced by the dimension of packet queues. Determining the optimal dimension based on t…
On Maximizing the Probability of Achieving Deadlines in Communication Networks Open
We consider the problem of meeting deadline constraints in wireless communication networks. Fulfilling deadlines depends heavily on the routing algorithm used. We study this dependence generically for a broad class of routing algorithms. F…
View article: Nature 4.0: A networked sensor system for integrated biodiversity monitoring
Nature 4.0: A networked sensor system for integrated biodiversity monitoring Open
Ecosystem functions and services are severely threatened by unprecedented global loss in biodiversity. To counteract these trends, it is essential to develop systems to monitor changes in biodiversity for planning, evaluating, and implemen…
Label-Aware Aggregation for Improved Federated Learning Open
Federated Averaging (FedAvg) is the most common aggregation method used in Federated learning, which performs a weighted averaging of the updates based on the sizes of the individual datasets of each client. A raising discussion in the res…
View article: <i>NvPrdm14d</i> -expressing neural progenitor cells contribute to non-ectodermal neurogenesis in <i>Nematostella vectensis</i>
<i>NvPrdm14d</i> -expressing neural progenitor cells contribute to non-ectodermal neurogenesis in <i>Nematostella vectensis</i> Open
Neurogenesis has been studied extensively in the ectoderm, from which most animals generate the majority of their neurons. Neurogenesis from non-ectodermal tissue is, in contrast, poorly understood. Here we use the cnidarian Nematostella v…
On the Incremental Reconfiguration of Time-sensitive Networks at Runtime Open
Static configurations in Time-sensitive Networking (TSN) using the Time-aware Shaper allow precise calculations of deterministic, tight bandwidth and latency guarantees for realtime industrial application streams. It is, however, this stat…
Evolutionary conserved aspects of animal nutrient uptake and transport in sea anemone vitellogenesis Open
Vitellogenesis, the accumulation of egg yolk, relies on the transport of dietary nutrients from the gut to the ovary through the circulatory system in many bilaterians (e.g. vertebrates, arthropods). How these dietary nutrients and yolk pr…
User Plane Hardware Acceleration in Access Networks: Experiences in Offloading Network Functions in Real 5G Deployments Open
Fulfilling the ambitious Quality of Service demands of today’s wireless networks, especially low latency, high bandwidths and availability, is a big challenge for researchers, network architects, and operators. Each networking component on…
POSTER: Leveraging PIFO Queues for Scheduling in Time-Sensitive Networks Open
Time-Sensitive Networking emerged as a convergent Ethernet-based real-time networking standard for industrial applications. To support real-time, jitter-free isochronous traffic the corresponding TSN mechanism denoted Time Aware Shaper req…
Leveraging Flexibility of Time-Sensitive Networks for dynamic Reconfigurability Open
In Time-Sensitive Networks (TSN) applications with the highest real-time flow requirements are deployed using the Time-Aware Shaper which requires careful planning and scheduling of flows before deployment. Such deployments lack support fo…
View article: P4-CoDel: Experiences on Programmable Data Plane Hardware
P4-CoDel: Experiences on Programmable Data Plane Hardware Open
Fixed buffer sizing in computer networks, especially the Internet, is a compromise between latency and bandwidth. A decision in favor of high bandwidth, implying larger buffers, subordinates the latency as a consequence of constantly fille…
Energy-efficient Mobile Sensor Data Offloading via WiFi using LoRa-based Connectivity Estimations Open
Animal monitoring in natural habitats provides significant insights into the animals’ behavior, interactions, health, or external influences. However, the sizes of monitoring devices attachable to animals strongly depends on the animals’ s…
View article: OpenBNG: Central office network functions on programmable data plane hardware
OpenBNG: Central office network functions on programmable data plane hardware Open
Summary Telecommunication providers continuously evolve their network infrastructure by increasing performance, lowering time to market, providing new services, and reducing the cost of the infrastructure and its operation. Network functio…
Increasing the Quality of 360° Video Streaming by Transitioning between Viewport Quality Adaptation Mechanisms Open
Virtual reality has been gaining popularity in recent years caused by the proliferation of affordable consumer-grade devices such as Oculus Rift, HTC Vive, and Samsung VR. Amongst the various VR applications, 360° video streaming is curren…
A Trust Management and Misbehaviour Detection Mechanism for Multi-Agent Systems and its Application to Intelligent Transportation Systems Open
Cooperative information shared among a multi-agent system (MAS) can be useful to agents to efficiently fulfill their missions. Relying on wrong information, however, can have severe consequences. While classical approaches only consider me…
View article: Introducing Nature 4.0: A sensor network for environmental monitoring in the Marburg Open Forest
Introducing Nature 4.0: A sensor network for environmental monitoring in the Marburg Open Forest Open
Successful conservation strategies require frequent observations and assessments of the landscape. Although expert surveys provide a great level of detail, the trade-off is the limited spatial coverage and repetition with which they are ex…
A Trust Management and Misbehaviour Detection Mechanism for Multi-Agent Systems and its Application to Intelligent Transportation Systems Open
Cooperative information shared among a multi-agent system (MAS) can be useful to agents to efficiently fulfill their missions. Relying on wrong information, however, can have severe consequences. While classical approaches only consider me…
Adaptive and Scalable Communication Networks [Scanning the Issue] Open
In this special issue, we have collected and presented recent works on innovative approaches and emerged technologies for coping with dynamicity, heterogeneity, and the scale, which have been central to (or even enablers of) recent advance…
View article: Transitions: A Protocol-Independent View of the Future Internet
Transitions: A Protocol-Independent View of the Future Internet Open
Countless novel approaches to communication protocols, overlay networks, and distributed middleware are published every year, yet the adoption of such novel findings in the global Internet landscape progresses at a slow pace. Many of such …
CBA: Contextual Quality Adaptation for Adaptive Bitrate Video Streaming (Extended Version) Open
Recent advances in quality adaptation algorithms leave adaptive bitrate (ABR) streaming architectures at a crossroads: When determining the sustainable video quality one may either rely on the information gathered at the client vantage poi…