@misc{LopacinskiBuechnerNolteetal., author = {Lopacinski, Lukasz and B{\"u}chner, Steffen and Nolte, J{\"o}rg and Brzozowski, Marcin and Kraemer, Rolf}, title = {Towards 100 Gbps wireless communication: energy efficiency of ARQ, FEC, and RF-frontends}, series = {International Symposium on Wireless Communication Systems (ISWCS), Poznan/Poland, 2016}, journal = {International Symposium on Wireless Communication Systems (ISWCS), Poznan/Poland, 2016}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-5090-2061-4}, doi = {10.1109/ISWCS.2016.7600922}, pages = {320 -- 324}, language = {en} } @misc{LohsSiegemundNolteetal., author = {Lohs, Stefan and Siegemund, Gerry and Nolte, J{\"o}rg and Turau, Volker}, title = {Self-Stabilization - A Mechanism to Make Networked Embedded Systems More Reliable?}, series = {35th Symposium on Reliable Distributed Systems (SRDS), Budapest, Hungary, September 26-29, 2016}, journal = {35th Symposium on Reliable Distributed Systems (SRDS), Budapest, Hungary, September 26-29, 2016}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-5090-3513-7}, doi = {10.1109/SRDS.2016.049}, pages = {317 -- 326}, abstract = {The erratic behavior of wireless channels is still a major hurdle in the implementation of robust applications in wireless networks. In the past it has been argued that self-stabilization is a remedy to provide the needed robustness. This assumption has not been verified to the extent necessary to convince engineers implementing such applications. A major reason is that the time in which a self-stabilizing system returns to a valid state is unpredictable and potentially unbound. Failure rates typically depend on physical phenomena and in self-stabilizing systems each node tries to react to failures in an inherently adaptive fashion by the cyclic observation of its neighbors' states. When the frequency of state changes is too high, the system may never reach a state sufficiently stable for a specific task. In this paper we substantiate the conditions under which self-stabilization leads to fault tolerance in wireless networks and look at the myths about the power of self-stabilization as a particular instance of self-organization. We investigate the influences of the error rate and the neighbor state exchange rate on the stability and the convergence time on topology information acquired in real network experiments.}, language = {en} } @misc{LohsSiegemundNolteetal., author = {Lohs, Stefan and Siegemund, Gerry and Nolte, J{\"o}rg and Turau, Volker}, title = {Influence of Topology-Fluctuations on Self-Stabilizing Algorithms}, series = {International Conference on Distributed Computing in Sensor Systems (DCOSS)}, journal = {International Conference on Distributed Computing in Sensor Systems (DCOSS)}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-5090-1460-6}, pages = {122 -- 124}, abstract = {Self-stabilizing systems have in theory the unique and provable ability, to always return to a valid system state even in the face of failures. These properties are certainly desirable for domains like wireless ad-hoc networks with numerous unpredictable faults. Unfortunately, the time in which the system returns to a valid state is not predictable and potentially unbound. The failure rate typically depends on physical phenomena and in self-stabilizing systems each node tries to react to failures in an inherently adaptive fashion by the cyclic observation of the states of its neighbors. When state changes are either too quick or too slow the system might never reach a state that is sufficiently stable for a specific task. In this paper, we investigate the influences of the error rate on the (stability) convergence time on the basis of topology information acquired in real network experiments. This allows us to asses the asymptotic behavior of relevant self-stabilizing algorithms in typical wireless networks.}, language = {en} } @misc{BuechnerLopacinskiNolteetal., author = {B{\"u}chner, Steffen and Lopacinski, Lukasz and Nolte, J{\"o}rg and Kraemer, Rolf}, title = {100 Gbit/s End-to-End Communication: Designing Scalable Protocols with Soft Real-Time Stream Processing}, series = {2016 IEEE 41st Conference on Local Computer Networks, 7-10 Nov. 2016}, journal = {2016 IEEE 41st Conference on Local Computer Networks, 7-10 Nov. 2016}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-5090-2054-6}, doi = {10.1109/LCN.2016.25}, language = {en} } @misc{RottaNolteNikolovetal., author = {Rotta, Randolf and Nolte, J{\"o}rg and Nikolov, Vladimir and Schubert, Lutz and Bonfert, Stefan and Wesner, Stefan}, title = {MyThOS — Scalable OS Design for Extremely Parallel Applications}, series = {2016 Intl IEEE Conferences on Ubiquitous Intelligence Computing, Advanced and Trusted Computing, Scalable Computing and Communications, Cloud and Big Data Computing, Internet of People, and Smart World Congress, 18-21 July 2016}, journal = {2016 Intl IEEE Conferences on Ubiquitous Intelligence Computing, Advanced and Trusted Computing, Scalable Computing and Communications, Cloud and Big Data Computing, Internet of People, and Smart World Congress, 18-21 July 2016}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-5090-2771-2}, doi = {10.1109/UIC-ATC-ScalCom-CBDCom-IoP-SmartWorld.2016.0179}, pages = {1165 -- 1172}, abstract = {Many-core architectures trade single-thread performance for a larger number of cores. Scalable throughput can be attained only by a high degree of parallelism, minimized synchronization. Whilst this is achievable for many applications, the operating system still introduces bottlenecks through non-local sharing, synchronization,, message passing. A particular challenge for highly dynamic applications, for example invasive HPC applications, elastic compute clouds, is the management of short-living application threads, processes. This paper discusses OS architecture choices based on microkernel, multikernel, distributed systems designs, our development experience in the context of the MyThOS project. Initial experiments show a much faster thread creation, activation compared to monolithic systems like Linux while providing a more flexible protection, threading model that is better suited for dynamic scenarios. However, despite significant progress in the overall domain of operating systems, the design space for scalable many-core operating systems is yet to be fully explored.}, language = {en} } @misc{RottaKubanSchoepsetal., author = {Rotta, Randolf and Kuban, Robert and Sch{\"o}ps, Mark Simon and Nolte, J{\"o}rg}, title = {Dealing with Layers of Obfuscation in pseudo-Uniform Memory Architectures}, series = {Euro-Par 2016: Parallel Processing Workshops, Euro-Par 2016 International Workshops, Grenoble, France, August 24-26, 2016}, journal = {Euro-Par 2016: Parallel Processing Workshops, Euro-Par 2016 International Workshops, Grenoble, France, August 24-26, 2016}, publisher = {Springer International Publishing}, address = {Cham}, isbn = {978-3-319-58942-8}, doi = {10.1007/978-3-319-58943-5_55}, pages = {685 -- 696}, abstract = {Pseudo-Uniform Memory Architectures hide the memory's throughput bottlenecks and the network's latency differences in order to provide near-peak average throughput for computations on large datasets. This obviates the need for application-level partitioning and load balancing between NUMA domains but the performance of cross-core communication still depends on the actual placement of the involved variables and cores, which can result in significant variation within applications and between application runs. This paper analyses the pseudo-uniform memory latency on the Intel Xeon Phi Knights Corner processor, derives strategies for the optimised placement of important variables, and discusses the role of localised coordination in pUMA systems. For example, a basic cache line ping-pong benchmark showed a 3x speedup between adjacent cores. Therefore, pUMA systems combined with support for controlled placement of small datasets are an interesting option when processor-wide load balancing is difficult while localised coordination is feasible.}, language = {en} } @misc{LopacinskiBrzozowskiKraemeretal., author = {Lopacinski, Lukasz and Brzozowski, Marcin and Kraemer, Rolf and B{\"u}chner, Steffen and Nolte, J{\"o}rg}, title = {Improving Energy Efficiency using a Link Adaptation Algorithm Dedicated for 100 Gbps Wireless Communication}, series = {AE{\"U} - International Journal of Electronics and Communications}, volume = {81}, journal = {AE{\"U} - International Journal of Electronics and Communications}, issn = {1434-8411}, pages = {67 -- 73}, language = {en} } @inproceedings{LopacinskiBrzozowskiKraemeretal., author = {Lopacinski, Lukasz and Brzozowski, Marcin and Kraemer, Rolf and KrishneGowda, Karthik and B{\"u}chner, Steffen and Nolte, J{\"o}rg}, title = {Towards 100 Gbps Wireless Communication: Investigation of FEC Interleavers for PSSS-15 Spreading}, series = {IEEE EUROCON 2017, 17th International Conference on Smart Technologies, Ohrid, Macedonia, 6-8 July 2017}, booktitle = {IEEE EUROCON 2017, 17th International Conference on Smart Technologies, Ohrid, Macedonia, 6-8 July 2017}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-5090-3843-5}, pages = {619 -- 623}, language = {en} } @misc{BuechnerLopacinskiKraemeretal., author = {B{\"u}chner, Steffen and Lopacinski, Lukasz and Kraemer, Rolf and Nolte, J{\"o}rg}, title = {Protocol Processing for 100 Gbit/s and Beyond - A Soft Real-Time Approach in Hardware and Software}, series = {Frequenz: Journal of RF-Engineering and Telecommunications}, volume = {71}, journal = {Frequenz: Journal of RF-Engineering and Telecommunications}, number = {9-10}, issn = {2191-6349}, pages = {427 -- 438}, language = {en} } @misc{BuechnerNolteHasanietal., author = {B{\"u}chner, Steffen and Nolte, J{\"o}rg and Hasani, Alireza and Kraemer, Rolf}, title = {100 Gbit/s End-to-End Communication: Low Overhead On-Demand Protocol Replacement in High Data Rate Communication Systems}, series = {42nd Conference on Local Computer Networks (LCN), 9-12 Oct. 2017, Singapore}, journal = {42nd Conference on Local Computer Networks (LCN), 9-12 Oct. 2017, Singapore}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-5090-6523-3}, doi = {10.1109/LCN.2017.40}, pages = {231 -- 234}, language = {en} } @misc{KarnapkeNolte, author = {Karnapke, Reinhardt and Nolte, J{\"o}rg}, title = {Unidirectional Link Counter - a Routing Protocol for Wireless Sensor Networks with Many Unidirectional Links}, series = {14th Annual Mediterranean Ad Hoc Networking Workshop (Med-Hoc-Net 2015), Vilamoura, Portugal, 17 - 18 June 2015}, journal = {14th Annual Mediterranean Ad Hoc Networking Workshop (Med-Hoc-Net 2015), Vilamoura, Portugal, 17 - 18 June 2015}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-1-4673-7306-7}, pages = {1 -- 7}, language = {en} }