@inproceedings{NolteSchroederPreikschat, author = {Nolte, J{\"o}rg and Schr{\"o}der-Preikschat, Wolfgang}, title = {Dual Objects - An Object Model for Distributed System Programming}, series = {Proceedings of the 8th ACM SIGOPS European workshop on Support for composing distributed applications}, booktitle = {Proceedings of the 8th ACM SIGOPS European workshop on Support for composing distributed applications}, publisher = {ACM Digital Library}, address = {New York, NY}, pages = {261 -- 267}, language = {en} } @misc{CordsenNolteSchroederPreikschat, author = {Cordsen, J. and Nolte, J{\"o}rg and Schr{\"o}der-Preikschat, Wolfgang}, title = {Experiences Developing a Virtual Shared Memory System using Hig-Level Object Paradigms}, series = {Object oriented programming, 12th European conference, proceedings, ECOOP '98, Brussels, Belgium, July 20 - 24, 1998}, journal = {Object oriented programming, 12th European conference, proceedings, ECOOP '98, Brussels, Belgium, July 20 - 24, 1998}, publisher = {Springer}, address = {Berlin [u.a.]}, isbn = {3-540-64737-6}, pages = {285 -- 306}, language = {en} } @misc{Nolte, author = {Nolte, J{\"o}rg}, title = {A Topology Based Approach to Coordinated Multicast Operations}, series = {Parallel and distributed processing, 10 IPPS/SPDP '98, Orlando, Florida, USA, March 30 - April 3, 1998, proceedings}, journal = {Parallel and distributed processing, 10 IPPS/SPDP '98, Orlando, Florida, USA, March 30 - April 3, 1998, proceedings}, publisher = {Springer}, address = {Berlin [u.a.]}, pages = {195 -- 206}, language = {en} } @inproceedings{BuettnerNolte, author = {B{\"u}ttner, J. and Nolte, J{\"o}rg}, title = {ARTS: Flexible Runtime Support for Massively Parallel Systems}, language = {en} } @misc{NolteKonakaHorietal., author = {Nolte, J{\"o}rg and Konaka, Hiroki and Hori, Atsushi and Ishikawa, Yutaka and Maeda, Munenori and Tomokiyo, Takashi}, title = {Ocore and VAST - Integrating Persistence into a Parallel Object-Oriented Language}, series = {Object technologies for advanced software, proceedings, ISOTAS '96, Kanazawa, Japan, March 11 - 15, 1996}, journal = {Object technologies for advanced software, proceedings, ISOTAS '96, Kanazawa, Japan, March 11 - 15, 1996}, editor = {Futatsugi, Kokichi}, publisher = {Springer}, address = {Berlin}, isbn = {3-540-60954-7}, pages = {260 -- 274}, language = {en} } @misc{MankKarnapkeNolte, author = {Mank, Stephan and Karnapke, Reinhardt and Nolte, J{\"o}rg}, title = {MLMAC-UL and ECTS-MAC - Two MAC Protocols for Wireless Sensor Networks with Unidirectional Links}, series = {Third International Conference on Sensor Technologies and Applications, 2009, SENSORCOMM '09 ; 18 - 23 June 2009, Athens/Glyfada, Greece}, journal = {Third International Conference on Sensor Technologies and Applications, 2009, SENSORCOMM '09 ; 18 - 23 June 2009, Athens/Glyfada, Greece}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-0-7695-3669-9}, pages = {623 -- 629}, language = {en} } @misc{HoecknerLagemannNolte, author = {H{\"o}ckner, S{\"o}ren and Lagemann, Andreas and Nolte, J{\"o}rg}, title = {Integration of Event-Driven Embedded Systems INto OMNeT++ - A Case Study with REFLEX}, series = {SIMUTools'09, proceedings cd of the 2nd International Conference on Simulation Tools and Techniques, March 2 - 6, 2009, Rome, Italy}, journal = {SIMUTools'09, proceedings cd of the 2nd International Conference on Simulation Tools and Techniques, March 2 - 6, 2009, Rome, Italy}, publisher = {ACM Press}, address = {New York, NY}, isbn = {978-963-9799-45-5}, language = {en} } @misc{MankKarnapkeNolte, author = {Mank, Stephan and Karnapke, Reinhardt and Nolte, J{\"o}rg}, title = {MAC Protocols for Wireless Sensor Networks: Tackling the Problem of Unidirectional Links}, series = {International journal on advances in networks and services}, volume = {2}, journal = {International journal on advances in networks and services}, number = {4}, issn = {1942-2644}, pages = {218 -- 229}, language = {en} } @article{NolteSatoIshikawa, author = {Nolte, J{\"o}rg and Sato, Mitsuhisa and Ishikawa, Yutaka}, title = {Exploiting Cluster Networks for Distributed Object Groups and Collective Operations}, language = {en} } @article{NolteIshikawaSato, author = {Nolte, J{\"o}rg and Ishikawa, Yutaka and Sato, Mitsuhisa}, title = {TACO - Prototyping High-Level Object-Oriented Programming Constructs by Means of Template Based Programming Techniques}, language = {en} } @article{NolteHorton, author = {Nolte, J{\"o}rg and Horton, Paul}, title = {Parallel Sequence Matching with TACO's Distributed Object Groups : a Case Study from Molecular Biology}, series = {Cluster Computing}, volume = {4}, journal = {Cluster Computing}, number = {1}, issn = {1386-7857}, pages = {71 -- 77}, language = {en} } @article{BuettnerNolteSchroederPreikschat, author = {B{\"u}ttner, L. and Nolte, J{\"o}rg and Schr{\"o}der-Preikschat, Wolfgang}, title = {ARTS of PEACE - A High-Performance Middleware Layer for Parallel and Disributed Computing}, language = {en} } @misc{NolteSatoIshikawa, author = {Nolte, J{\"o}rg and Sato, Mitsuhisa and Ishikawa, Yutaka}, title = {TACO - Exploiting Cluster Networks for High-Level Collective Operations}, series = {Proceedings, First IEEE/ACM International Symposium on Cluster Computing and the Grid, Brisbane, Australia, May 15 - 18, 2001}, journal = {Proceedings, First IEEE/ACM International Symposium on Cluster Computing and the Grid, Brisbane, Australia, May 15 - 18, 2001}, publisher = {IEEE Computer Soc.}, address = {Los Alamitos, Calif. [u.a.]}, isbn = {0-7695-1010-8}, pages = {253 -- 260}, language = {en} } @misc{NolteSatoIshikawa, author = {Nolte, J{\"o}rg and Sato, Mitsuhisa and Ishikawa, Yutaka}, title = {Parallel Programming with Distributed Object Groups - the TACO Approach}, language = {en} } @misc{NolteSatoIshikawa, author = {Nolte, J{\"o}rg and Sato, Mitsuhisa and Ishikawa, Yutaka}, title = {TACO - Dynamic Distributed Collections with Templates and Topologies}, series = {European Conference on Parallel Computing, Euro-Par 2000, M{\"u}nchen, Germany}, journal = {European Conference on Parallel Computing, Euro-Par 2000, M{\"u}nchen, Germany}, publisher = {Springer}, address = {Berlin [u.a.]}, isbn = {3-540-67956-1}, pages = {1071 -- 1081}, language = {en} } @inproceedings{Nolte, author = {Nolte, J{\"o}rg}, title = {Towards a Persistence Framework for High Performance Computing Systems}, series = {Real World Computing Partnership, Japan, 1995, Technical Report TR-95007}, booktitle = {Real World Computing Partnership, Japan, 1995, Technical Report TR-95007}, language = {en} } @book{Nolte, author = {Nolte, J{\"o}rg}, title = {Language-level support for remote object invocations}, publisher = {GMD}, address = {Sankt Augustin}, pages = {26}, language = {en} } @inproceedings{BergCordsenHeueretal., author = {Berg, R. and Cordsen, J. and Heuer, J. and Nolte, J{\"o}rg and Oestmann, B. and Sander, M. and Schmidt, Heiko and Sch{\"o}n, F. and Schr{\"o}der-Preikschat, Wolfgang}, title = {The PEACE Family of Distributed Operating Systems}, language = {en} } @inproceedings{BergCordsenHastedtetal., author = {Berg, R. and Cordsen, J. and Hastedt, Ch. and Heuer, J. and Nolte, J{\"o}rg and Sander, M. and Schmidt, Heiko and Sch{\"o}n, F. and Schr{\"o}der-Preikschat, Wolfgang}, title = {Making Massively Parallel Systems Work}, language = {en} } @inproceedings{HeuerNolteSanderetal., author = {Heuer, J. and Nolte, J{\"o}rg and Sander, M. and Sch{\"o}n, F. and Schr{\"o}der-Preikschat, Wolfgang}, title = {Making Massively Parallel Systems Fast}, language = {en} } @inproceedings{EichlerNoltePatzeltetal., author = {Eichler, L. and Nolte, J{\"o}rg and Patzelt, Th. and Sch{\"o}n, F. and Schr{\"o}der, W. and Seidel, W.}, title = {Communication and Management Protocols for the Distributed PEACE Operating System}, series = {GMD FIRST an der TU Berlin, Technical report, Contract TR-8502-A-2}, booktitle = {GMD FIRST an der TU Berlin, Technical report, Contract TR-8502-A-2}, publisher = {GMD}, address = {Sankt Augustin}, language = {en} } @phdthesis{Nolte, author = {Nolte, J{\"o}rg}, title = {Duale Objekte - Ein Modell zur objektorientierten Konstruktion von Programmfamilien f{\"u}r massiv parallele Systeme}, publisher = {Oldenbourg}, address = {M{\"u}nchen}, isbn = {3-486-23097-2}, pages = {XIX, 184}, language = {de} } @incollection{IshikawaHoriTezukaetal., author = {Ishikawa, Yutaka and Hori, Atsushi and Tezuka, H. and Matsuda, M. and Konaka, Hiroki and Maeda, Munenori and Tomokiyo, Takashi and Nolte, J{\"o}rg}, title = {MPC++}, series = {Parallel programming using C++}, booktitle = {Parallel programming using C++}, editor = {Wilson, Gregory V.}, publisher = {MIT Press}, address = {Cambridge}, isbn = {0-262-73118-5}, pages = {429 -- 464}, language = {en} } @misc{NolteYutakaMitsuhisa, author = {Nolte, J{\"o}rg and Yutaka, I. and Mitsuhisa, S.}, title = {TACO - Prototyping High-Level Object-Oriented Programming Constructs by Means of Template Based Programming Techniques}, series = {Proceedings of the 16th ACM SIGPLAN conference on Object-oriented programming, systems, languages, and applications, OOPSLA 2001}, journal = {Proceedings of the 16th ACM SIGPLAN conference on Object-oriented programming, systems, languages, and applications, OOPSLA 2001}, publisher = {ACM}, address = {New York, NY}, language = {en} } @misc{SieberWaltherNuernbergeretal., author = {Sieber, Andr{\´e} and Walther, Karsten and N{\"u}rnberger, Stefan and Nolte, J{\"o}rg}, title = {Implicit Sleep Mode Determination in Power Management of Event-driven Deeply Embedded Systems}, series = {Wired, wireless internet communications, 7th international conference, proceedings, WWIC 2009, Enschede, The Netherlands, May 27 - 29, 2009}, journal = {Wired, wireless internet communications, 7th international conference, proceedings, WWIC 2009, Enschede, The Netherlands, May 27 - 29, 2009}, publisher = {Springer}, address = {Berlin [u.a.]}, isbn = {978-3-642-02117-6}, pages = {13 -- 23}, language = {en} } @misc{NuernbergerKarnapkeNolte, author = {N{\"u}rnberger, Stefan and Karnapke, Reinhardt and Nolte, J{\"o}rg}, title = {Sensorium - An Active Monitoring System for Neighborhood Relations in Wireless Sensor Networks}, series = {Ad hoc networks, second international conference, revised selected papers, ADHOCNETS 2010, Victoria, BC, Canada, August 18 - 20, 2010}, journal = {Ad hoc networks, second international conference, revised selected papers, ADHOCNETS 2010, Victoria, BC, Canada, August 18 - 20, 2010}, publisher = {Springer}, address = {Berlin [u.a.]}, isbn = {978-3-642-17993-8}, pages = {34 -- 48}, language = {en} } @inproceedings{LagemannNolteWeyeretal., author = {Lagemann, Andreas and Nolte, J{\"o}rg and Weyer, Christoph and Turau, Volker}, title = {Mission Statement: Applying Self-Stabilization to Wireless Sensor Networks}, language = {en} } @misc{SieberKarnapkeNolteetal., author = {Sieber, Andr{\´e} and Karnapke, Reinhardt and Nolte, J{\"o}rg and Martschei, Thomas}, title = {Using Sensor Technology to Protect an Endangered Species: A Case Study}, series = {2011 IEEE 36th Conference on Local Computer Networks (LCN), Bonn, Germany, 4 - 7 October 2011, vol. 2}, journal = {2011 IEEE 36th Conference on Local Computer Networks (LCN), Bonn, Germany, 4 - 7 October 2011, vol. 2}, publisher = {IEEE}, isbn = {978-1-61284-926-3}, pages = {1044 -- 1047}, language = {en} } @misc{PrescherRottaNolte, author = {Prescher, Thomas and Rotta, Randolf and Nolte, J{\"o}rg}, title = {Flexible Sharing and Replication Mechanisms for Hybrid Memory Architectures}, series = {Proceedings of the 4th Many-Core Applications Research Community (MARC) Symposium}, journal = {Proceedings of the 4th Many-Core Applications Research Community (MARC) Symposium}, publisher = {Univ.-Verl.}, address = {Potsdam}, isbn = {978-3-86956-169-1}, pages = {67 -- 72}, language = {en} } @inproceedings{SieberNolte, author = {Sieber, Andr{\´e} and Nolte, J{\"o}rg}, title = {Utilizing Voltage Decline for Reaching Lifetime Goals}, series = {Proceedings of the 10. GI/ITG KuVS Fachgespraech Drahtlose Sensornetze (FGSN 2011), Paderborn, Germany, September 2011}, booktitle = {Proceedings of the 10. GI/ITG KuVS Fachgespraech Drahtlose Sensornetze (FGSN 2011), Paderborn, Germany, September 2011}, pages = {57 -- 60}, abstract = {The battery dictates the lifetime of many embedded systems, especially wireless sensor networks.This makes it necessary to deal with battery management.In this paper we present an approach for a battery management which enables a sensor node to reach a defined lifetime.The presented approach gives feedback to an energy manager if the current power consumption must be lowered or can be increased to reach the runtime goal.In contrast to other systems the battery is handled as black box to keep the system independent from the battery type and brand.First experiments yield promising results of this concept to reach a certain lifetime goal while maintaining a high application quality.}, language = {en} } @misc{RottaPrescherTraueetal., author = {Rotta, Randolf and Prescher, Thomas and Traue, Jana and Nolte, J{\"o}rg}, title = {Data Sharing Mechanisms for Parallel Graph Algorithms on the Intel SCC}, series = {MARC Symposium at ONERA'2012, July 19th-20th 2012, Toulouse, Frankreich}, journal = {MARC Symposium at ONERA'2012, July 19th-20th 2012, Toulouse, Frankreich}, isbn = {978-2-7257-0016-8}, pages = {13 -- 18}, language = {en} } @misc{RottaBuechnerNolte, author = {Rotta, Randolf and B{\"u}chner, Steffen and Nolte, J{\"o}rg}, title = {Middleware for Many-Cores - Why It Is Needed and What Functionality It Should Provide}, series = {4th USENIX Workshop on Hot Topics in Parallelism (HotPar '12), Berkeley, 2012}, journal = {4th USENIX Workshop on Hot Topics in Parallelism (HotPar '12), Berkeley, 2012}, abstract = {Today's multi-cores and future many-cores are NUMA architectures with complex cache hierarchies and multiple memory channels. Depending on the topologies of these memory networks we find everything from true data sharing with shared caches to distributed memory architectures which just pretend to be physical shared memory systems. In fact, most many-cores are hybrid systems that exhibit the characteristics of both distributed systems and SMPs. In this paper we argue in favor of middleware platforms for many-cores. We will discuss the needed functionality in contrast to common distributed system middleware and present micro benchmarks on several architectures to substantiate our claims.}, language = {en} } @misc{RottaPrescherTraueetal., author = {Rotta, Randolf and Prescher, Thomas and Traue, Jana and Nolte, J{\"o}rg}, title = {In-Memory Communication Mechanisms for Many-Cores - Experiences with the Intel SCC}, series = {TACC-Intel Highly Parallel Computing Symposium (TIHPCS), Austin/Texas, 2012}, journal = {TACC-Intel Highly Parallel Computing Symposium (TIHPCS), Austin/Texas, 2012}, abstract = {Many-core processors combine fast on-chip communication with access to large amounts of shared memory. This makes it possible to exploit the benefits of distributed as well as shared memory programming models within single parallel algorithms. While large amounts of data can be shared in the memory and caches, coordinating the activities of hundreds of cores relies on cross core communication mechanisms with ultra low latency for very small messages. In this paper we discuss two communication protocols for the Intel SCC and compare them to the MPI implementation of the SCC. Our micro-benchmark results underline that special purpose protocols for small messages make much finer levels of parallelism possible than general purpose message passing systems. Index Terms—many-core, message passing, shared memory}, language = {en} } @misc{LohsKarnapkeNolte, author = {Lohs, Stefan and Karnapke, Reinhardt and Nolte, J{\"o}rg}, title = {Link stability in a wireless sensor network - an experimental study}, series = {Sensor systems and software, third international ICST conference, revised selected papers, Lisbon, Portugal, June 4 - 5, 2012}, journal = {Sensor systems and software, third international ICST conference, revised selected papers, Lisbon, Portugal, June 4 - 5, 2012}, publisher = {Springer}, address = {Heidelberg [u.a.]}, isbn = {978-3-642-32777-3}, pages = {146 -- 163}, language = {en} } @misc{LohsKarnapkeNolteetal., author = {Lohs, Stefan and Karnapke, Reinhardt and Nolte, J{\"o}rg and Lagemann, Andreas}, title = {Self-stabilizing Sensor Networks for Emergency Management}, series = {Second Workshop on Pervasive Networks for Emergency Management, Lugano, Switzerland, March 2012}, journal = {Second Workshop on Pervasive Networks for Emergency Management, Lugano, Switzerland, March 2012}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-4673-0905-9}, pages = {721 -- 726}, language = {en} } @inproceedings{SieberNolte, author = {Sieber, Andr{\´e} and Nolte, J{\"o}rg}, title = {Device Management for Limiting the Load Applied to Batteries}, series = {Technical Report SEEMOO-TR-2012-03, 11. Fachgespr{\"a}ch Sensornetze der GI/ITG Fachgruppe Kommunikation und Verteilte Systeme, 13.-14. September 2012, Technische Universit{\"a}t Darmstadt}, booktitle = {Technical Report SEEMOO-TR-2012-03, 11. Fachgespr{\"a}ch Sensornetze der GI/ITG Fachgruppe Kommunikation und Verteilte Systeme, 13.-14. September 2012, Technische Universit{\"a}t Darmstadt}, publisher = {Technische Universit{\"a}t}, address = {Darmstadt}, pages = {15 -- 18}, language = {en} } @inproceedings{TraueKarnapkeNolte, author = {Traue, Jana and Karnapke, Reinhardt and Nolte, J{\"o}rg}, title = {From Parallel Systems to Wireless Sensor Networks and Back}, series = {Technical Report SEEMOO-TR-2012-03, 11. Fachgespr{\"a}ch Sensornetze der GI/ITG Fachgruppe Kommunikation und Verteilte Systeme, 13.-14. September 2012, Technische Universit{\"a}t Darmstadt}, booktitle = {Technical Report SEEMOO-TR-2012-03, 11. Fachgespr{\"a}ch Sensornetze der GI/ITG Fachgruppe Kommunikation und Verteilte Systeme, 13.-14. September 2012, Technische Universit{\"a}t Darmstadt}, publisher = {Technische Universit{\"a}t}, address = {Darmstadt}, pages = {29 -- 32}, language = {en} } @inproceedings{LohsNolteSiegemundetal., author = {Lohs, Stefan and Nolte, J{\"o}rg and Siegemund, Gerry and Turau, Volker}, title = {Mission Statement: ToleranceZone : A Self-Stabilizing Middleware for Wireless Sensor Netzworks}, series = {Technical Report SEEMOO-TR-2012-03, 11. Fachgespr{\"a}ch Sensornetze der GI/ITG Fachgruppe Kommunikation und Verteilte Systeme, 13.-14. September 2012, Technische Universit{\"a}t Darmstadt}, booktitle = {Technical Report SEEMOO-TR-2012-03, 11. Fachgespr{\"a}ch Sensornetze der GI/ITG Fachgruppe Kommunikation und Verteilte Systeme, 13.-14. September 2012, Technische Universit{\"a}t Darmstadt}, publisher = {Technische Universit{\"a}t}, address = {Darmstadt}, pages = {33 -- 35}, language = {en} } @misc{SiegemundTurauWeyeretal., author = {Siegemund, Gerry and Turau, Volker and Weyer, Christoph and Lohs, Stefan and Nolte, J{\"o}rg}, title = {An Agile and Stable Neighborhood Protocol for WSNs}, series = {Stabilization, Safety, and Security of Distributed Systems, 15th International Symposium, SSS 2013, Osaka, Japan, November 13-16, 2013}, journal = {Stabilization, Safety, and Security of Distributed Systems, 15th International Symposium, SSS 2013, Osaka, Japan, November 13-16, 2013}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-03089-0}, doi = {10.1007/978-3-319-03089-0_35}, pages = {376 -- 378}, language = {en} } @misc{LohsKarnapkeNolte, author = {Lohs, Stefan and Karnapke, Reinhardt and Nolte, J{\"o}rg}, title = {ToleranceZone - A Self-Stabilizing Middleware for Wireless Sensor Networks}, pages = {4}, language = {en} } @misc{KarnapkeNolte, author = {Karnapke, Reinhardt and Nolte, J{\"o}rg}, title = {Buckshot Routing with Distance Vectors in Three Application Scenarios for Wireless Sensor Networks with Unstable Network Topologies and Unidirectional Links}, series = {Journal on Sensors and Transducers}, volume = {185}, journal = {Journal on Sensors and Transducers}, number = {2}, issn = {1726-5479}, pages = {53 -- 67}, abstract = {Experiments have shown that the number of asymmetric and unidirectional links often exceeds the number of bidirectional ones, especially in the transitional area of the communication range of wireless sensor nodes. Still, most of today's routing protocols ignore their existence or try to remove their implications. Also, links are not stable over time, and routes become unusable often, resulting in a need for new routing protocols that can handle highly dynamic links and use unidirectional links to their advantage. At Sensorcomm 2014, we presented BuckshotDV, a routing protocol which is resilient against link fluctuations and uses the longer reach of unidirectional links to increase its performance. Furthermore, its distance vector nature makes it scalable for large sensor networks. This paper is an extended version which adds some implementation details and the evaluation of BuckshotDV in two more application scenarios.}, language = {en} } @misc{KarnapkeNolte, author = {Karnapke, Reinhardt and Nolte, J{\"o}rg}, title = {BuckshotDV - A robust Routing Protocol for Wireless Sensor Networks with unstable Network Topologies and Unidirectional Links}, series = {SENSORCOMM 2014, The Eighth International Conference on Sensor Technologies and Applications, Lisbon, Portugal}, journal = {SENSORCOMM 2014, The Eighth International Conference on Sensor Technologies and Applications, Lisbon, Portugal}, publisher = {IARIA}, isbn = {978-1-61208-374-2}, pages = {60 -- 65}, abstract = {Experiments have shown that the number of asym- metric and unidirectional links often exceeds the number of bidirectional ones, especially in the transitional area of the communication range of wireless sensor nodes. Still, most of today's routing protocols ignore their existence or try to remove their implications. Also, links are not stable over time, and routes become unusable often, resulting in a need for new routing protocols that can handle highly dynamic links and use unidirectional links to their advantage. In this paper, we present BuckshotDV, a routing protocol which is resilient against link fluctuations and uses the longer reach of unidirectional links to increase its performance. Furthermore, its distance vector nature makes it scalable for large sensor networks.}, language = {en} } @misc{KarnapkeNolte, author = {Karnapke, Reinhardt and Nolte, J{\"o}rg}, title = {Triangle Routing in Wireless Sensor Networks with Unidirectional Links Revisited - a Look at Different Scenarios}, series = {International Journal on Advances in Networks and Services}, volume = {17}, journal = {International Journal on Advances in Networks and Services}, number = {1/2}, issn = {1942-2644}, pages = {72}, abstract = {Experiments with wireless sensor networks have shown that links are often asymmetric or unidirectional. This represents a serious problem for many routing protocols, which often depend on bidirectional links. Routing protocols that can use unidirectional links often induce a high overhead. To overcome this problem we introduced Unidirectional Link Triangle Routing, a routing protocol, which uses neighborhood information, gathered actively or passively, to route around unidirectional links. In this paper, we describe Unidirectional Link Triangle Routing in further detail and present additional evaluation results from different application scenarios.}, language = {en} } @misc{KarnapkeNolte, author = {Karnapke, Reinhardt and Nolte, J{\"o}rg}, title = {Unidirectional Link Triangle Routing for Wireless Sensor Networks}, series = {SENSORCOMM 2013, The Seventh International Conference on Sensor Technologies and Applications, Barcelona, Spain}, journal = {SENSORCOMM 2013, The Seventh International Conference on Sensor Technologies and Applications, Barcelona, Spain}, publisher = {IARIA}, isbn = {978-1-61208-296-7}, pages = {7 -- 14}, abstract = {Experiments with wireless sensor networks have shown that asymmetric and unidirectional links do not only exist, but are indeed quite common. Still, many people argue that the gain in connectivity is not worth the effort of making them usable for routing protocols. In this paper, we follow the opposite approach and introduce Unidirectional Link Triangle Routing, which reduces the overhead and, therefore, makes unidirectional links usable on the routing layer.}, language = {en} } @misc{LopacinskiNolteBuechneretal., author = {Lopacinski, Lukasz and Nolte, J{\"o}rg and B{\"u}chner, Steffen and Brzozowski, Marcin and Kraemer, Rolf}, title = {Design and Implementation of an Adaptive Algorithm for Hybrid Automatic Rrepeat Request}, series = {18th International Symposium on Design and Diagnostics of Electronic Circuits \& Systems (DDECS), Belgrade/Serbia, 2015}, journal = {18th International Symposium on Design and Diagnostics of Electronic Circuits \& Systems (DDECS), Belgrade/Serbia, 2015}, publisher = {IEEE}, doi = {10.1109/DDECS.2015.32}, pages = {263 -- 266}, language = {en} } @misc{MenzelKarnapkeBuechneretal., author = {Menzel, Hannes and Karnapke, Reinhardt and B{\"u}chner, Steffen and Nolte, J{\"o}rg}, title = {Applying Wireless Sensor Networks to Renaturation Monitoring: From Requirements to Deployment}, series = {IFIP Wireless Days (WD) 2014, Rio/Brasil}, journal = {IFIP Wireless Days (WD) 2014, Rio/Brasil}, publisher = {IEEE}, doi = {http://dx.doi.org/10.1109/WD.2014.7020825}, pages = {4}, language = {en} } @inproceedings{SiegemundTurauLohsetal., author = {Siegemund, Gerry and Turau, Volker and Lohs, Stefan and Nolte, J{\"o}rg}, title = {Directed Link Utilization with Mahalle+}, series = {12. GI-ITG Fachgespr{\"a}ch Sensornetze}, booktitle = {12. GI-ITG Fachgespr{\"a}ch Sensornetze}, publisher = {Brandenburg University of Technology}, address = {Cottbus}, pages = {29 -- 32}, language = {en} } @misc{KarnapkeLohsNolte, author = {Karnapke, Reinhardt and Lohs, Stefan and Nolte, J{\"o}rg}, title = {How to ruin Sensor Network Performance using Duplicate Suppression}, series = {Sensor Systems and Software, 5th International Conference, S-CUBE 2014, Coventry, UK, October 6-7, 2014, Revised Selected Papers}, journal = {Sensor Systems and Software, 5th International Conference, S-CUBE 2014, Coventry, UK, October 6-7, 2014, Revised Selected Papers}, editor = {Kanjo, Eiman and Trossen, Dirk}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-17135-7}, pages = {20 -- 29}, language = {en} } @misc{KarnapkeLohsLagemannetal., author = {Karnapke, Reinhardt and Lohs, Stefan and Lagemann, Andreas and Nolte, J{\"o}rg}, title = {Simulation of Unidirectional Links in Wireless Sensor Networks}, 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}, pages = {118 -- 125}, language = {en} } @misc{BeyerLohsNolteetal., author = {Beyer, Sandra and Lohs, Stefan and Nolte, J{\"o}rg and Karnapke, Reinhardt and Siegemund, Gerry}, title = {Self-Stabilizing Structures for Data Gathering in Wireless Sensor Networks}, 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 = {71 -- 76}, language = {en} } @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} } @misc{NuernbergerRottaDrescheretal., author = {N{\"u}rnberger, Stefan and Rotta, Randolf and Drescher, Gabor and Danner, Daniel and Nolte, J{\"o}rg}, title = {Diamond Rings: Acknowledged Event Propagation in Many-Core Processors}, series = {Euro-Par 2015: Parallel Processing Workshops, Vienna, 2015}, journal = {Euro-Par 2015: Parallel Processing Workshops, Vienna, 2015}, publisher = {Springer International Publishing}, address = {Cham}, isbn = {978-3-319-27308-2}, doi = {10.1007/978-3-319-27308-2_58}, pages = {722 -- 733}, abstract = {Hardware and software consistency protocols rely on global observability of consistency events. Acknowledged broadcast is an obvious choice to propagate these events. This paper presents a generalized ring topology for parallel event propagation with acknowledged delivery. Implementations for various many-core architectures show increased performance over conventional approaches. Therefore, diamond rings are a prime candidate for implementations of distributed memory models.}, language = {en} } @misc{NuernbergerDrescherRottaetal., author = {N{\"u}rnberger, Stefan and Drescher, Gabor and Rotta, Randolf and Nolte, J{\"o}rg and Schr{\"o}der-Preikschat, Wolfgang}, title = {Shared Memory in the Many-Core Age}, series = {Euro-Par 2014: Parallel Processing Workshops, Porto, 2014}, journal = {Euro-Par 2014: Parallel Processing Workshops, Porto, 2014}, publisher = {Springer International Publishing}, address = {Cham}, isbn = {978-3-319-14312-5}, doi = {10.1007/978-3-319-14313-2_30}, pages = {351 -- 362}, abstract = {With the evolution toward fast networks of many-core processors, the design assumptions at the basis of software-level distributed shared memory (DSM) systems change considerably. But efficient DSMs are needed because they can significantly simplify the implementation of complex distributed algorithms. This paper discusses implications of the many-core evolution and derives a set of reusable elementary operations for future software DSMs. These elementary operations will help in exploring and evaluating new memory models and consistency protocols.}, language = {en} } @misc{LopacinskiBrzozowskiKraemeretal., author = {Lopacinski, Lukasz and Brzozowski, Marcin and Kraemer, Rolf and Nolte, J{\"o}rg}, title = {100 Gbps Wireless - Challenges to the Data Link Layer}, series = {IEICE Information and Communication Technology Forum, Poznan/Poland, 2014}, journal = {IEICE Information and Communication Technology Forum, Poznan/Poland, 2014}, pages = {6}, language = {en} } @misc{LopacinskiNolteBuechneretal., author = {Lopacinski, Lukasz and Nolte, J{\"o}rg and B{\"u}chner, Steffen and Brzozowski, Marcin and Kraemer, Rolf}, title = {A 100 Gbps data link layer with an adaptive algorithm for forward error correction}, series = {Proceedings of 2015 IEICE ICTF, Manchester/United Kingdom, 2015}, journal = {Proceedings of 2015 IEICE ICTF, Manchester/United Kingdom, 2015}, pages = {6}, language = {en} } @misc{LopacinskiBrzozowskiKraemeretal., author = {Lopacinski, Lukasz and Brzozowski, Marcin and Kraemer, Rolf and B{\"u}chner, Steffen and Nolte, J{\"o}rg}, title = {100 Gbps data link layer - from simulation to FPGA implementation}, series = {Journal of Telecommunications and Information Technology (JTIT)}, journal = {Journal of Telecommunications and Information Technology (JTIT)}, number = {1}, issn = {1509-4553}, pages = {90 -- 100}, language = {en} } @misc{LopacinskiNolteBuechneretal., author = {Lopacinski, Lukasz and Nolte, J{\"o}rg and B{\"u}chner, Steffen and Brzozowski, Marcin and Kraemer, Rolf}, title = {Improved Turbo Product Coding dedicated for 100 Gbps Wireless Terahertz Communication}, series = {27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), Valencia/Spain, 2016}, journal = {27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), Valencia/Spain, 2016}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-5090-3254-9}, doi = {10.1109/PIMRC.2016.7794685}, pages = {6}, language = {en} } @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} } @misc{KubanRottaNolte, author = {Kuban, Robert and Rotta, Randolf and Nolte, J{\"o}rg}, title = {Help Your Busy Neighbors: Dynamic Multicasts over Static Topologies}, series = {Euro-Par 2017: Parallel Processing Workshops}, journal = {Euro-Par 2017: Parallel Processing Workshops}, editor = {Heras, Dora B. and Boug{\´e}, Luc}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-75177-1}, doi = {10.1007/978-3-319-75178-8_51}, pages = {636 -- 657}, language = {en} } @misc{SegabinazziFerreiraNolte, author = {Segabinazzi Ferreira, Raphael and Nolte, J{\"o}rg}, title = {Low latency reconfiguration mechanism for fine-grained processor internal functional units}, series = {2019 IEEE Latin American Test Symposium (LATS)}, journal = {2019 IEEE Latin American Test Symposium (LATS)}, isbn = {978-1-7281-1756-0}, issn = {2373-0862}, doi = {10.1109/LATW.2019.8704560}, pages = {6}, abstract = {The strive for performance, low power consumption, and less chip area have been diminishing the reliability and the time to fault occurrences due to wear out of electronic devices. Recent research has shown that functional units within processors usually execute a different amount of operations when running programs. Therefore, these units present different individual wear out during their lifetime. Most existent schemes for reconfiguration of processors due to fault detection and other processor parameters are done at the level of cores which is a costly way to achieve redundancy. This paper presents a low latency (approximately 1 clock cycle) software controlled mechanism to reconfigure units within processor cores according to predefined parameters. Such reconfiguration capability delivers features like wear out balance of processor functional units, configuration of units according to the criticality of tasks running on an operating system and configurations to gain in performance (e.g. parallel execution) when possible. The focus of this paper is to show the implemented low latency reconfiguration mechanism and highlight its possible main features.}, language = {en} } @misc{SegabinazziFerreiraGeorgeChenetal., author = {Segabinazzi Ferreira, Raphael and George, Nevin and Chen, Junchao and H{\"u}bner, Michael and Krstic, Milos and Nolte, J{\"o}rg and Vierhaus, Heinrich Theodor}, title = {Configurable Fault Tolerant Circuits and System Level Integration for Self-Awareness}, series = {Proceedings of the Work in Progress Session held in connection with SEAA 2019, the 45th EUROMICRO Conference on Software Engineering and Advanced Applications and DSD 2019, the 22nd EUROMICRO Conference on Digital System Design}, journal = {Proceedings of the Work in Progress Session held in connection with SEAA 2019, the 45th EUROMICRO Conference on Software Engineering and Advanced Applications and DSD 2019, the 22nd EUROMICRO Conference on Digital System Design}, publisher = {SEA-Publications}, address = {Kallithea, Chalkidiki (Greece)}, isbn = {978-3-902457-54-7}, doi = {10.26127/BTUOpen-5050}, pages = {2}, abstract = {Scaling minimum features of ICs down to the 10nm- area and below has allowed high integration rates in electronics. Scaling at supply voltages of 1V and below also implies a rising level of stress which drives aging effects that reduce switching speed and the expected life time. Additionally, vulnerability from particle radiation is increased. Hence, fault detection and on- line correction become a must for many applications. However, not only fault tolerance but self-awareness becomes also an advantage. Provided that by being aware of its own healthy state allow optimized configurations regarding system operation modes and configurable hardware mechanism. This paper shows a preliminary work in a configurable circuit and explores its configuration possibilities when integrated into a complete system.}, language = {en} } @misc{JenihhinHamdiouiSonzaReordaetal., author = {Jenihhin, Maksim and Hamdioui, Said and Sonza-Reorda, Matteo and Krstic, Milos and Langend{\"o}rfer, Peter and Sauer, Christian and Klotz, Anton and H{\"u}bner, Michael and Nolte, J{\"o}rg and Vierhaus, Heinrich Theodor and Selimis, Georgions and Alexandrescu, Dan and Taouil, Mottaqiallah and Schrijen, Geert-Jan and Sterpone, Luca and Squillero, Giovanni and Dyka, Zoya and Raik, Jaan}, title = {RESCUE: Interdependent Challenges of Reliability, Security and Quality in Nanoelectronic Systems}, series = {ArXiv.org}, journal = {ArXiv.org}, pages = {7}, language = {en} } @misc{SegabinazziFerreiraNolteVargasetal., author = {Segabinazzi Ferreira, Raphael and Nolte, J{\"o}rg and Vargas, Fabian and George, Nevin and H{\"u}bner, Michael}, title = {Run-time Hardware Reconfiguration of Functional Units to Support Mixed-Critical Applications}, series = {IEEE Latin American Test Symposium (LATS), Macei{\´o}, Brazil}, journal = {IEEE Latin American Test Symposium (LATS), Macei{\´o}, Brazil}, doi = {10.1109/LATS49555.2020.9093692}, pages = {6}, language = {en} } @misc{HasaniLopacinskiBuechneretal., author = {Hasani, Alireza and Lopacinski, Lukasz and B{\"u}chner, Steffen and Nolte, J{\"o}rg and Kraemer, Rolf}, title = {A Modified Shuffling Method to Split the Critical Path Delay in Layered Decoding of QC-LDPC Codes}, series = {30th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2019), Istanbul, Turkey, 08 - 11 September 2019}, journal = {30th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2019), Istanbul, Turkey, 08 - 11 September 2019}, isbn = {978-1-5386-8110-7}, issn = {2166-9589}, doi = {10.1109/PIMRC.2019.8904435}, language = {en} } @misc{HasaniLopacinskiBuechneretal., author = {Hasani, Alireza and Lopacinski, Lukasz and B{\"u}chner, Steffen and Nolte, J{\"o}rg and Kraemer, Rolf}, title = {An Unnoticed Property in QC-LDPC Codes to Find the Message from the Codeword in Non-Systematic Codes}, series = {28th European Conference on Networks and Communications (EuCNC 2019), Valencia, Spain, 18 - 21 June 2019}, journal = {28th European Conference on Networks and Communications (EuCNC 2019), Valencia, Spain, 18 - 21 June 2019}, publisher = {IEEE}, isbn = {978-1-7281-0546-8}, issn = {2575-4912}, doi = {10.1109/EuCNC.2019.8801957}, pages = {4}, language = {en} } @misc{HasaniLopacinskiBuechneretal., author = {Hasani, Alireza and Lopacinski, Lukasz and B{\"u}chner, Steffen and Nolte, J{\"o}rg and Kraemer, Rolf}, title = {A Modified Rejection-Based Architecture to Find the First Two Minima in Min-Sum-Based LDPC Decoders}, series = {IEEE Wireless Communications and Networking Conference (WCNC 2020), Seoul, South Korea, 25 - 28 May 2020}, journal = {IEEE Wireless Communications and Networking Conference (WCNC 2020), Seoul, South Korea, 25 - 28 May 2020}, publisher = {IEEE}, isbn = {978-1-7281-3106-1}, issn = {1558-2612}, doi = {10.1109/WCNC45663.2020.9120630}, language = {en} } @incollection{BuechnerNolteHasanietal., author = {B{\"u}chner, Steffen and Nolte, J{\"o}rg and Hasani, Alireza and Kraemer, Rolf and Lopacinski, Lukasz}, title = {End2End100 - Communication Protocol Processing for Ultra High Data Rates}, series = {Wireless 100 Gbps and beyond : architectures, spproaches and findings of German Research Foundation (DFG) priority programme SPP 1655}, booktitle = {Wireless 100 Gbps and beyond : architectures, spproaches and findings of German Research Foundation (DFG) priority programme SPP 1655}, editor = {Kraemer, Rolf and Scholz, Stefan}, edition = {1. Auflage}, publisher = {IHP GmbH}, address = {Frankfurt (Oder)}, isbn = {978-3-96439-003-5}, pages = {359 -- 396}, language = {en} } @misc{RottaSegabinazziFerreiraNolte, author = {Rotta, Randolf and Segabinazzi Ferreira, Raphael and Nolte, J{\"o}rg}, title = {Real-time dynamic hardware reconfiguration for processors with redundant functional units}, series = {Proceedings of the 2020 IEEE 23rd International Symposium on Real-Time Distributed Computing (ISORC)}, journal = {Proceedings of the 2020 IEEE 23rd International Symposium on Real-Time Distributed Computing (ISORC)}, publisher = {Institute of Electrical and Electronics Engineers Inc. (IEEE)}, address = {Nashville, TN, USA}, isbn = {978-1-7281-6958-3}, issn = {2375-5261}, doi = {10.1109/ISORC49007.2020.00035}, pages = {2}, abstract = {The tiny logic elements in modern integrated circuits increase the rate of transient failures significantly. Therefore, redundancy on various levels is necessary to retain reliability. However, for mixed-criticality scenarios, the typical processor designs offer either too little fault-tolerance or too much redundancy for one part of the applications. Amongst others, we specifically address redundant processor internal functional units (FU) to cope with transient errors and support wear leveling. A real-time operating system (RTOS) was extended to control our prototypical hardware platform and, since it can be configured deterministically within few clock cycles, we are able to reconfigure the FUs dynamically, at process switching time, according to the specified critically of the running processes. Our mechanisms were integrated into the Plasma processor and the Plasma-RTOS. With few changes to the original software code, it was, for example, possible to quickly change from fault-detecting to fault-correcting modes of the processor on demand.}, language = {en} } @misc{BuechnerHasaniLopacinskietal., author = {B{\"u}chner, Steffen and Hasani, Alireza and Lopacinski, Lukasz and Kraemer, Rolf and Nolte, J{\"o}rg}, title = {100 Gbit/s End-to-End Communication: Adding Flexibility with Protocol Templates}, series = {2018 IEEE 43rd Conference on Local Computer Networks (LCN)}, journal = {2018 IEEE 43rd Conference on Local Computer Networks (LCN)}, edition = {1. Auflage}, isbn = {978-1-5386-4413-3}, issn = {0742-1303}, doi = {10.1109/LCN.2018.8638078}, pages = {263 -- 266}, abstract = {High-speed protocol processing that provides data-rates of 100 Gbit/s and beyond to the application stresses the whole communication system up to its outer limits. Such a system can only be utilized by employing highly specialized, application specific protocols, that are tailored for certain communication parameters, such as the packet loss rate. However, the requirements for most applications are not static, and a protocol designer cannot anticipate all possible communication conditions upfront. The contradiction between specialized protocols and unknown communication parameters can be solved by adapting the protocol implementation on demand to the current communication conditions. However, such an approach needs a protocol description language that allows the automatic specialization of protocols. In this paper, we present the Protocol Engine Template Language (PETL), that allows the automatic implementation of protocols by a constructive approach for a variety of communication conditions from protocol implementation templates.}, language = {en} } @misc{EichlerHofmeierReifetal., author = {Eichler, Christian and Hofmeier, Henriette and Reif, Stefan and H{\"o}nig, Timo and Nolte, J{\"o}rg and Schr{\"o}der-Preikschat, Wolfgang}, title = {Neverlast: Towards the Design und Implementation of the NVM-based Everlasting Operating System}, series = {Hawaii International Conference on System Sciences 2021 - HICSS-54}, journal = {Hawaii International Conference on System Sciences 2021 - HICSS-54}, publisher = {Scholarspace}, doi = {10.24251/HICSS.2021.870}, pages = {7227 -- 7236}, language = {en} } @misc{KoehlerHerzogHoenigetal., author = {K{\"o}hler, Sven and Herzog, Benedict and H{\"o}nig, Timo and Wenzel, Lukas and Plauth, Max and Nolte, J{\"o}rg and Polze, Andreas and Schr{\"o}der-Preikschat, Wolfgang}, title = {Pinpoint the Joules: Unifying Runtime-Support for Energy Measurements on Heterogeneous Systems}, series = {2020 IEEE/ACM International Workshop on Runtime and Operating Systems for Supercomputers (ROSS)}, volume = {1}, journal = {2020 IEEE/ACM International Workshop on Runtime and Operating Systems for Supercomputers (ROSS)}, publisher = {IEEE Xplore}, pages = {31 -- 40}, abstract = {For the design and operation of today's computer systems, power and energy requirements are highest priorities. Unlike performance analyses, however, power and energy measurements of heterogeneous systems are difficult to conduct. Especially at the system-software level, performing power and energy measurements remains challenging. Yet, such measurements are essential to improve software components for low power and high energy-efficiency.In this paper, we analyze and discuss the power and energy characteristics of several heterogeneous systems with up to 20 cores (160 hardware threads) and 1 TB of main memory. For the analyzed systems, we outline challenges regarding power and energy measurements and show ways to overcome limitations (i.e., sampling constraints). To improve the current state of the art in power and energy measurements at the system-software level, we present the design and implementation of PINPOINT, an energy-profiling tool which unifies different power and energy measurement interfaces.}, language = {en} } @misc{GierschNolte, author = {Giersch, Oliver and Nolte, J{\"o}rg}, title = {Fast and Portable Concurrent FIFO Queues with Deterministic Memory Reclamation}, series = {IEEE Transactions on Parallel and Distributed Systems (TPDS)}, volume = {33}, journal = {IEEE Transactions on Parallel and Distributed Systems (TPDS)}, number = {3}, issn = {1045-9219}, doi = {10.1109/TPDS.2021.3097901}, pages = {604 -- 616}, language = {en} } @misc{KoeppenTraueBorchertetal., author = {K{\"o}ppen, Marcel and Traue, Jana and Borchert, Christoph and Nolte, J{\"o}rg and Spinczyk, Olaf}, title = {Cache-Line Transactions: Building Blocks for Persistent Kernel Data Structures Enabled by AspectC++}, series = {PLOS '19, Proceedings of the 10th Workshop on Programming Languages and Operating Systems}, journal = {PLOS '19, Proceedings of the 10th Workshop on Programming Languages and Operating Systems}, editor = {Hawblitzel, Chris and Muller, Gilles and Spinczyk, Olaf}, publisher = {acm, The Association for Computing Machinery}, address = {New York}, isbn = {978-1-4503-7017-2}, doi = {10.1145/3365137.3365396}, pages = {38 -- 44}, language = {en} } @misc{SchmausPfeifferHoenigetal., author = {Schmaus, Florian and Pfeiffer, Nicolas and H{\"o}nig, Timo and Nolte, J{\"o}rg and Schr{\"o}der-Preikschat, Wolfgang}, title = {Nowa: A Wait-Free Continuation-Stealing Concurrency Platform}, series = {2021 IEEE International Parallel and Distributed Processing Symposium (IPDPS)}, journal = {2021 IEEE International Parallel and Distributed Processing Symposium (IPDPS)}, publisher = {IEEE}, isbn = {978-1-6654-4066-0}, doi = {10.1109/IPDPS49936.2021.00044}, pages = {360 -- 371}, language = {en} } @misc{ChatharajupalliRottaKarnapkeetal., author = {Chatharajupalli, Navya Sneha and Rotta, Randolf and Karnapke, Reinhardt and Nolte, J{\"o}rg}, title = {Assessing the Feasibility of Combined BLE and Wi-Fi Communication for High Data Sensing Applications}, series = {EWSN '23: Proceedings of the 2023 International Conference on Embedded Wireless Systems and Networks}, journal = {EWSN '23: Proceedings of the 2023 International Conference on Embedded Wireless Systems and Networks}, publisher = {Association for Computing Machinery}, address = {New York}, doi = {10.5555/3639940.3639948}, pages = {56 -- 59}, abstract = {Advanced sensors generate more data than can be transmitted using classic battery-powered wireless sensor networks. While using Wi-Fi would provide plenty of throughput, the receivers are energy hungry and, thus, the radio time needs to be reduced. Previous research suggests to combine Wi-Fi with low-power technologies such as BLE for an energy efficient coordination of the Wi-Fi radios. Existing approaches focus on individual point-to-point routes whereas certain applications require concurrent transmissions. We evaluated the combination of BLE and Wi-Fi on the ESP32-S3 multi-radio microcontroller through detailed energy and throughput measurements. The results show that established BLE connections allow to activateWi-Fi quickly on-demand; the energy efficiency of the data transmission is significantly improved over previous works but the BLE connection setup is prohibitively slow. While the combination of BLE and Wi-Fi provides high throughput with good energy efficiency, careful design of the BLE-based signalling protocol is necessary to also achieve low latency.}, language = {en} } @inproceedings{ChatharajupalliRottaNolte, author = {Chatharajupalli, Navya Sneha and Rotta, Randolf and Nolte, J{\"o}rg}, title = {P2 - VibroMote: Energy efficient Vibration Monitoring for Railway tracks and Bridges}, series = {iCCC2024 - iCampµs Cottbus Conference 2024-05-14 - 2024-05-16}, booktitle = {iCCC2024 - iCampµs Cottbus Conference 2024-05-14 - 2024-05-16}, publisher = {AMA Service GmbH, Von-M{\"u}nchhausen-Str. 49, 31515 Wunstorf, Germany}, isbn = {978-3-910600-00-3}, doi = {10.5162/iCCC2024/P2}, pages = {123 -- 126}, abstract = {Filtering, storing, and transmitting measurements of high-resolution sensors within a limited energy budget is challenging. For instance, a 3-axis MEMS acceleration sensor for structural condition monitoring and predictive maintenance generates up to 160 kB/s at a sampling rate of 26.6 kHz. This paper discusses the design space with focus on solar harvesting solutions. VibroMote is an energy efficient sensor node that combines a multi-radio micro-controller, an ultra-low power co-processor with persistent memory, a solar harvester, and multiple energy storage options. This enables prototyping of solar-powered long-term data acquisition, in-node processing, and wireless networking for high-resolution sensors.}, language = {en} } @misc{RabensteinNguyenGierschetal., author = {Rabenstein, Jonas and Nguyen, Dustin and Giersch, Oliver and Eichler, Christian and H{\"o}nig, Timo and Nolte, J{\"o}rg and Schr{\"o}der-Preikschat, Wolfgang}, title = {Back to the core-memory age: running operating systems in NVRAM only}, series = {Proceedings: architecture of computing systems: 36th International Conference, ARCS 2023, June 13 - 15, 2023}, journal = {Proceedings: architecture of computing systems: 36th International Conference, ARCS 2023, June 13 - 15, 2023}, editor = {Goumas, Georgios and Tomforde, Sven and Brehm, J{\"u}rgen and Wildermann, Stefan and Pionteck, Thilo}, publisher = {Springer-Verlag}, isbn = {978-3-031-42784-8}, doi = {10.1007/978-3-031-42785-5_11}, pages = {153 -- 167}, abstract = {The classic core memory was completely non-volatile and thus kept at least part of the operating system persistently in main memory, even over power cycles. Nowadays we can repeat this approach with NVRAM, but with terabytes of main memory on a completely different scale and with parts of the operating-system state stored in volatile CPU caches. In this paper, we discuss our experiences of running large modern operating systems including their applications entirely in NVRAM. We adapted stock Linux and FreeBSD kernels to work exclusively with NVRAM by hiding all DRAM from the kernels at boot time to establish a realistic performance baseline without changing anything else. Following this entirely NVRAM-agnostic approach, we could observe an effective performance penalty of a factor of about four, but only negligible increases in whole-system power draw. For our system with two CPU sockets and 56 cores total, we also observed a reduction in power draw in several scenarios. Due to prolonged execution times, the energy consumption increased as well for these measured workloads. While this might be discouraging at first sight, this result was achieved without any performance tuning as to the specific characteristics of today's NVRAM technology. Therefore, we are also discussing means to mitigate the observed shortcomings by integrating NVRAM appropriately into the memory hierarchy of future robust persistent systems.}, language = {en} } @misc{GierschNguyenNolteetal., author = {Giersch, Oliver and Nguyen, Dustin and Nolte, J{\"o}rg and Schr{\"o}der-Preikschat, Wolfgang}, title = {Virtual memory revisited for tiered memory}, series = {Proceedings of the 15th ACM SIGOPS Asia-Pacific Workshop on Systems}, journal = {Proceedings of the 15th ACM SIGOPS Asia-Pacific Workshop on Systems}, publisher = {ACM}, address = {New York, NY, USA}, isbn = {979-8-4007-1105-3}, doi = {10.1145/3678015.3680475}, pages = {1 -- 7}, abstract = {The landscape of memory technologies has grown substantially more diverse and heterogeneous, with a number of special-purpose memory technologies reaching market maturity in recent years, such as NVRAM (Non-Volatile Memory), HBM (High-Bandwidth Memory) or the upcoming CXL.mem. Future computing systems will have to contend with byte-addressable and cache-coherent main memory that is highly diverse, either in terms of the fundamental performance characteristics of its underlying memory technology, or due to the fact that CXL.mem will allow accessing homogenous but remote memory. The VM (Virtual Memory) subsystems of today have been empirically optimized over decades, but were designed for a single tier of main memory only. While recent approaches that integrated tiered memory have focused on better memory access metrics to improve page placement strategies, we seek to leverage the proven heuristics that are already in place. In times of high load we assign pages from slower memory, demote inactive pages according to standard page replacement strategies and use lazy page promotions when sufficient resources are available again to retain the inherently high reactivity of demand paging with regard to working set changes. We integrate these mechanisms into the VM subsystem of a full-featured mainstream operating system (FreeBSD) with minimal adaptations. The resulting multi-tier VM system runs in a stable and efficient manner under high stress even with highly unfavorable work loads.}, language = {en} } @misc{RottaChatharajupalliNaumannetal., author = {Rotta, Randolf and Chatharajupalli, Navya Sneha and Naumann, Billy and Schulz, Julius and Karnapke, Reinhardt and Werner, Matthias and Nolte, J{\"o}rg}, title = {Demo: B.A.T.M.A.N. mesh routing on ultra low-power IEEE 802.11 modules}, series = {2024 IEEE 49th Conference on Local Computer Networks (LCN)}, journal = {2024 IEEE 49th Conference on Local Computer Networks (LCN)}, publisher = {IEEE}, isbn = {979-8-3503-8800-8}, issn = {2832-1421}, doi = {10.1109/LCN60385.2024.10639789}, pages = {4}, abstract = {When implementing multi-hop mesh network protocols, efficient direct communication, route discovery, and route repair are crucial to achieve high network throughput. To our knowledge, there is no open mesh routing protocol available for ultra low power IEEE 802.11 modules. Previous work relied on single board computers like Raspberry Pi. We implemented the B.A.T.M.A.N. mesh protocol on the popular Espressif ESP32 along with a novel hybrid rate adaptation for the selection of efficient routes. In this demo we showcase challenges and solutions related to the implementation on ESP32 and how the hybrid rate adaptation improves end-to-end throughput.}, language = {en} }