@misc{BuechnerNolteKraemeretal., author = {B{\"u}chner, Steffen and Nolte, J{\"o}rg and Kraemer, Rolf and Lopacinski, Lukasz and Karnapke, Reinhardt}, title = {Challenges for 100 Gbit/s End to End Communication: Increasing Throughput Through Parallel Processing}, series = {40th Annual IEEE Conference on Local Computer Networks, 2015, Clearwater Beach Florida}, journal = {40th Annual IEEE Conference on Local Computer Networks, 2015, Clearwater Beach Florida}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-4673-6770-7}, doi = {10.1109/LCN.2015.7366337}, pages = {398 -- 401}, abstract = {Today's applications and services become more dependent on fast wireless communication, for the upcoming years data-rate demands of 100Gbit/s can be easily expected. However, fulfilling that demand is a task which cannot simply be solved by upscaling existing technologies. While most of the research tackles the challenges regarding the transmission technology from the physical layer up to base-band processing, we focus on the challenges concerning the handling of that vast amount of data. The overall goal is to bring together the transmission technology with the operating system to create a suitable end-to-end communication solution. In this paper we argue that communication can be understood as a soft-realtime problem and how that helps introducing parallelism into protocol-processing.}, language = {en} } @misc{LopacinskiNolteBuechneretal., author = {Lopacinski, Lukasz and Nolte, J{\"o}rg and B{\"u}chner, Steffen and Brzozowski, Marcin and Kraemer, Rolf}, title = {Parallel RS Error Correction Structures Dedicated for 100 Gbps Wireless Data Link Layer}, series = {15th IEEE International Conference on Ubiquitous Wireless Broadband 2015: Special Session on Wireless Terahertz Communications (IEEE ICUWB 2015 SPS 02), Montreal, 2015}, journal = {15th IEEE International Conference on Ubiquitous Wireless Broadband 2015: Special Session on Wireless Terahertz Communications (IEEE ICUWB 2015 SPS 02), Montreal, 2015}, publisher = {IEEE}, doi = {10.1109/ICUWB.2015.7324494}, pages = {1 -- 6}, language = {en} } @misc{LopacinskiBrzozowskiKraemeretal., author = {Lopacinski, Lukasz and Brzozowski, Marcin and Kraemer, Rolf and Nolte, J{\"o}rg and B{\"u}chner, Steffen}, title = {100 Gbps Wireless - Data Link Layer VHDL Implementation}, series = {Measurement Automation Monitoring}, volume = {61}, journal = {Measurement Automation Monitoring}, number = {7}, issn = {0032-4140}, pages = {333 -- 336}, language = {en} } @misc{LopacinskiBrzozowskiKraemeretal., author = {Lopacinski, Lukasz and Brzozowski, Marcin and Kraemer, Rolf and Nolte, J{\"o}rg and B{\"u}chner, Steffen}, title = {Design and performance measurements of an FPGA accelerator for a 100Gbps wireless data link layer}, series = {Radio Science Conference (URSI AT-RASC), 16-24 May 2015, Gran Canaria, Spain}, journal = {Radio Science Conference (URSI AT-RASC), 16-24 May 2015, Gran Canaria, Spain}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-4799-6871-8}, doi = {10.1109/URSI-AT-RASC.2015.7302966}, language = {en} } @misc{TraueNolteEngeletal., author = {Traue, Jana and Nolte, J{\"o}rg and Engel, Philipp and Karnapke, Reinhardt}, title = {Using Emulation Software to Predict the Performance of Algorithms on NVRAM}, series = {Proceedings of the 7th International ICST Conference on Simulation Tools and Techniques, SIMUTools '14}, journal = {Proceedings of the 7th International ICST Conference on Simulation Tools and Techniques, SIMUTools '14}, publisher = {ICST}, address = {Br{\"u}ssel}, isbn = {978-1-63190-007-5}, doi = {10.4108/icst.simutools.2014.254796}, pages = {142 -- 146}, abstract = {Currently, new storage technologies which unite the latency and byte-addressability of DRAM with the persistence of disks are being developed. This non-volatile memory (NVRAM) may start a software revolution. Traditionally, software was developed for two levels of storage and NVRAM reduces the hierarchy to a single-level store. Current research projects are already exploring the potential of NVRAM, but they face a challenge when they want to evaluate the performance: The new hardware is not yet available. In this paper, we discuss why benchmark results which are gained on existing DRAM are insufficient for a prediction of the performance on NVRAM. Either existing instructions have to be changed or new ones have to be introduced. We further show that the bochs emulator can be used to build systems which resemble NVRAM, to predict the NVRAM's consequences, and it even allows a comparison of algorithms for NVRAM.}, language = {en} } @misc{RottaTrauePrescheretal., author = {Rotta, Randolf and Traue, Jana and Prescher, Thomas and Nolte, J{\"o}rg}, title = {Interrupt-Driven Cross-Core Invocation Mechanisms on the Intel SCC}, series = {Proceedings of the Many-core Applications Research Community (MARC) Symposium at RWTH Aachen University 2012}, journal = {Proceedings of the Many-core Applications Research Community (MARC) Symposium at RWTH Aachen University 2012}, publisher = {Technische Hochschule}, address = {Aachen}, isbn = {978-3-00-039545-1}, pages = {1 -- 6}, abstract = {On many-core processors, both operating system kernels and bare metal applications need efficient cross-core coordination and communication. Although explicit shared- memory programming and message passing might provide the best performance, they also limit the system's control over scheduling. In contrast, interrupt-driven cross-core invocations provide universal coordination mechanisms that also enable preemptive operations across cores. This paper surveys cross- core invocation mechanisms and their usability with respect to prevalent coordination scenarios. We integrated some of these mechanisms into a bare-metal environment for the Intel SCC pro- cessor and will discuss implementation aspects of the interrupt- driven invocations. In conclusion, such invocation mechanisms provide an expressive platform for future operating systems kernels and bare-metal applications.}, language = {en} } @misc{SieberNolteKarnapke, author = {Sieber, Andr{\´e} and Nolte, J{\"o}rg and Karnapke, Reinhardt}, title = {Using Energy Budgets to Reach Lifetime Goals while Compensating Dynamic Effects}, series = {SENSORCOMM 2015, The Ninth International Conference on Sensor Technologies and Applications, August 23-28, 2015 Venice, Italy}, journal = {SENSORCOMM 2015, The Ninth International Conference on Sensor Technologies and Applications, August 23-28, 2015 Venice, Italy}, publisher = {IARIA}, isbn = {978-1-61208-425-1}, pages = {7 -- 13}, abstract = {Nodes within sensor networks often have tight bound goals for the lifetime while running from a non-renewable energy source. Variations within the hardware or induced by the software complicate the prediction of the energy consumption. Additionally, batteries are vulnerable to temperature and non-linear effects. To reach certain lifetime goals under these influences without sacrificing energy due to pessimistic estimations, online energy management is necessary. In this paper, we present policies to control the behavior of applications and devices using energy budgets. First experiments yield promising results, with nodes reaching their lifetime goals while maintaining a high application quality.}, language = {en} } @misc{SieberNolte, author = {Sieber, Andr{\´e} and Nolte, J{\"o}rg}, title = {Online device-level energy accounting for wireless sensor nodes}, series = {Wireless Sensor Networks, Proceedings of the 10th European conference on Wireless Sensor Networks, Ghent, Belgien, 2013}, journal = {Wireless Sensor Networks, Proceedings of the 10th European conference on Wireless Sensor Networks, Ghent, Belgien, 2013}, publisher = {Springer}, address = {Berlin [u.a]}, isbn = {978-3-642-36672-7}, pages = {149 -- 164}, abstract = {Energy is the crucial factor for the lifetime of wireless sensor networks. Nonlinear battery effects and nonuniform workload distribution can lead to early node failures. This makes it necessary to manage energy consumption. But to manage energy it is essential to know how much energy is spent by the system. Additionally, for a more fine-grained management it is necessary, to know where the energy is spent. This can be a complicated task, since nodes are not identical due to device variations and the consumption can change over time. In this paper we present an online energy accounting approach which focuses on simplicity instead on fine granularity and timing accuracy. We argue that the efficacy of an energy accounting model depends more on the input consumption data than on exact timing, especially when the real consumption varies between nodes and in time. Results show that this approach is capable of correctly accounting the energy that nodes spend in scenarios with deviating environment conditions.}, language = {en} } @misc{SieberNolte, author = {Sieber, Andr{\´e} and Nolte, J{\"o}rg}, title = {Datasheet vs. Real World: A Look on Sensor Node Energy Consumption}, series = {2012 IEEE International Conference on Green Computing and Communications (GreenCom), Besancon, France, 20 - 23 November 2012}, journal = {2012 IEEE International Conference on Green Computing and Communications (GreenCom), Besancon, France, 20 - 23 November 2012}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-4673-5146-1}, pages = {641 -- 643}, abstract = {Energy and run time are mayor concerns in wireless sensor networks. Reliable information about the energy consumption is needed to be able to build a network and tune its application. In this paper we take a look on the energy consumption of the Texas Instruments eZ430-Chronos, an MSP430 based wireless sensor node, and compare it to the manufacturers datasheet. The measurements show how reliable these specifications are and which consequences should be taken.}, language = {en} } @inproceedings{SieberKarnapkeNolte, author = {Sieber, Andr{\´e} and Karnapke, Reinhardt and Nolte, J{\"o}rg}, title = {From Energy Accounting to Energy Management}, series = {13. GI/ITG Fachgespr{\"a}ch Sensornetze, 25. und 26. September 2014 an der Universit{\"a}t Potsdam}, booktitle = {13. GI/ITG Fachgespr{\"a}ch Sensornetze, 25. und 26. September 2014 an der Universit{\"a}t Potsdam}, publisher = {Universit{\"a}t}, address = {Potsdam}, pages = {25 -- 28}, abstract = {Embedded systems, e.g. nodes within sensor networks, often have tight bound goals for lifetime while running from a not renewable energy source. Mostly batteries are used, which are vulnerable to temperature and non-linear effects. Additionally, variations within the hardware or induced by the software make the prediction of the available and consumed energy a complicated task. To reach certain lifetime goals under these influences, online energy management is necessary. For a fine-grained management on the level of individual sub-tasks, it is necessary to know where in the system the energy is consumed. In this work, we extend our online energy accounting approach to enable online energy management. We present ways to control application and device behavior, and, thus, energy using energy budgets. First experiments yield promising results, reaching their lifetime goals while maintaining a high application quality.}, language = {en} } @misc{SieberNolteKarnapke, author = {Sieber, Andr{\´e} and Nolte, J{\"o}rg and Karnapke, Reinhardt}, title = {Compensating Dynamic Effects with Budget-based Energy Management to Reach Lifetime Goals}, series = {Sensors \& Transducers}, volume = {194}, journal = {Sensors \& Transducers}, number = {11}, issn = {2306-8515}, pages = {22 -- 34}, abstract = {Nodes within sensor networks often have tight bound goals for the lifetime while running from a non-renewable energy source. Variations within the hardware or induced by the software complicate the prediction of the energy consumption. Additionally, batteries are vulnerable to temperature and non-linear effects. To reach certain lifetime goals under these influences without sacrificing energy due to pessimistic estimations, online energy management is necessary. At Sensorcomm 2015 we presented policies to control the behavior of applications and devices using energy budgets. This paper is an extended version which adds further details and the evaluation of the proposed dynamic energy management in a real-world scenario.}, language = {en} } @inproceedings{BeyerLohsKarnapkeetal., author = {Beyer, Sandra and Lohs, Stefan and Karnapke, Reinhardt and Nolte, J{\"o}rg}, title = {Self-Stabilizing Aggregation- and Reduction-Structures for Wireless Sensor Networks}, series = {13. GI/ITG Fachgespr{\"a}ch Sensornetze, 25. und 26. September 2014 an der Universit{\"a}t Potsdam}, booktitle = {13. GI/ITG Fachgespr{\"a}ch Sensornetze, 25. und 26. September 2014 an der Universit{\"a}t Potsdam}, publisher = {Universit{\"a}t}, address = {Potsdam}, pages = {13 -- 16}, language = {en} }