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Sarah Ruepp
Technical University of Denmark
19Publications
3H-index
40Citations
Publications 20
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#1Sarah Ruepp (DTU: Technical University of Denmark)H-Index: 3
#2Alba Carrillo Mateo (DTU: Technical University of Denmark)
Last.Martin N. Pedersen (DTU: Technical University of Denmark)H-Index: 12
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Internet of Things (IoT) applications are becoming more and more popular for the transmission of sensor data in various environments. Due to required battery lifetime, Low-Power WAN technologies such as NB-IoT and LoRaWAN are promising candidates to provide connectivity in so called deep-indoor environments. In this paper, we compare these two technologies in terms of Received Signal Strength Indicator (RSSI) in a practical field test and to a simulation study.
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#1Krzysztof Mateusz Malarski (DTU: Technical University of Denmark)H-Index: 1
#2Alexander Victor Tietgen Bardram (DTU: Technical University of Denmark)H-Index: 1
Last.Sarah Ruepp (DTU: Technical University of Denmark)H-Index: 3
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In this work we investigate signal strength and quality of Narrowband Internet of Things (NB-IoT) in a marine environment. In particular, we demonstrate the suitability of the NB-IoT technology as signal carrier for maritime applications, where water and boat masts can potentially affect the transmission.
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#1Zifan Zhou (DTU: Technical University of Denmark)H-Index: 2
#2Ying Yan (DTU: Technical University of Denmark)H-Index: 8
Last.Sarah Ruepp (DTU: Technical University of Denmark)H-Index: 3
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Time Sensitive Network (TSN) is an attractive solution for time-critical frame transmission in data link layer. Traffic scheduling and shaping in TSN aim to achieve bounded low latency and zero congestion loss. TSN provides traditional frame switching with reliable Quality-of-Service (QoS) parameters, however, synchronization challenges, e.g. jitter, lost timing frames, clock inaccuracy, threaten the reliability of TSN network. Emerging Asynchronous Traffic Shaping (ATS) guarantees determinism f...
3 CitationsSource
#1Angelos Mimidis-Kentis (DTU: Technical University of Denmark)H-Index: 1
#2Artur Pilimon (DTU: Technical University of Denmark)H-Index: 1
Last.Sarah Ruepp (DTU: Technical University of Denmark)H-Index: 3
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The forwarding rules, used by the legacy and SDN network devices to perform routing/forwarding decisions, are generally stored in Ternary Content Addressable Memory (TCAM) modules, which offer constant look-up times, but have limited capacity, due to their high capital and operational costs, high power consumption and high silicon footprint. To counter this limitation, some commercial switches offer both, hardware and software flow table implementations, termed hybrid flow table architecture in ...
2 CitationsSource
#1Artur Pilimon (DTU: Technical University of Denmark)H-Index: 1
#2Angelos Mimidis Kentis (DTU: Technical University of Denmark)H-Index: 1
Last.Lars Dittmann (DTU: Technical University of Denmark)H-Index: 15
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In the recent years more and more existing services have moved from local execution environments into the cloud. In addition, new cloud-based services are emerging, which are characterized by very stringent delay requirements. This trend puts a stress in the existing monolithic architecture of Data Center Networks (DCN), thus creating the need to evolve them. Traffic Engineering (TE) has long been the way of attacking this problem, but as with DCN, needs to evolve by encompassing new technologie...
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#1Alexander Victor Tietgen Bardram (DTU: Technical University of Denmark)H-Index: 1
#2Mikkel Delbo Larsen (DTU: Technical University of Denmark)H-Index: 1
Last.Sarah Ruepp (DTU: Technical University of Denmark)H-Index: 3
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Low-power Internet of Things (IoT) solutions have become the main enabler for automated metering and monitoring. One of the use cases can be monitoring occupation of boat spots in a harbour. For this purpose Long Range Wide area network (LoRaWan) seems a promising technology, as it offers wide coverage and low power consumption. This paper describes and documents the simulation and field test phases in order to develop an IoT system for harbours. It contains a description of the IoT solution LoR...
1 CitationsSource
#1Artur Pilimon (DTU: Technical University of Denmark)H-Index: 1
#2Sarah Ruepp (DTU: Technical University of Denmark)H-Index: 3
Datacenters (DC) as well as their network interconnects are growing in scale and complexity. They are constantly being challenged in terms of energy and resource utilization efficiency, scalability, availability, reliability and performance requirements. Therefore, these resource-intensive environments must be properly tested and analyzed in order to make timely upgrades and transformations. However, a limited number of academic institutions and Research and Development companies have access to ...
1 CitationsSource
Jun 1, 2017 in HPSR (High Performance Switching and Routing)
#1Zifan Zhou (DTU: Technical University of Denmark)H-Index: 2
#2Ying Yan (DTU: Technical University of Denmark)H-Index: 8
Last.Michael S. Berger (DTU: Technical University of Denmark)H-Index: 7
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A standard priority-queuing system is capable of arranging packets with different traffic classes to guarantee a relatively low latency for the high priority traffic. However, in practical cases, severe delay may be caused by starting a large, low-priority frame ahead of a time-critical frame. In this paper, interspersed express traffic is evaluated, which enables preemption of non-time-critical transmission, in particular, the preemptive queuing system allows the cut-through transmission for cr...
2 CitationsSource
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