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International Symposium on parallel Processing

作者： A. Mohindra S. Yalamanchili Distributed Systems Group College of Computing Georgia Institute of Technology Atlanta GA USA Computer Systems Research Laboratory School of Electrical Engineering Georgia Institute of Technology Atlanta GA USA

Proposes a simple paradigm for constructing heuristics for the static assignment of parallel programs onto asynchronous, distributed memory, multiprocessor architectures. The proposed paradigm involves capturing the dominant computation and communication components of an application and using this relatively simpler program representation to determine an assignment. Thus, the mapping problem is reduced from its most general form to a simpler form which often has optimal solutions.< >

关键词： Concurrent computing computer architecture distributed computing Memory architecture Tree graphs Educational institutions Runtime Laboratories Bandwidth Computational efficiency

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Ensuring quality in distributed multimedia systems

Ensuring quality in distributed multimedia systems

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IEEE International Symposim on High Assurance systems engineering

作者： R. Paul M.F. Khan S. Baqai A. Ghafoor Testing and Evaluation Washington D.C. DC USA School of Electrical & Computer Engineering Distributed Multimedia Systems Laboratory Purdue University West Lafayette IN USA

The use of multimedia technology can provide cost effective methods for management and dissemination of information, and thus increase economic efficiency. distributed, networked multimedia information systems will be a critical component of technology-based information infrastructures in the future. Several ground breaking applications have already appeared, and more are expected to follow. Innovations in hardware and software are feeding this revolution. In this paper, the notion of quality for multimedia data transferred over the networks is developed. Multimedia data synchronization requirements are specified to ensure high quality delivery of multimedia information. Accordingly we propose synchronization techniques in a client server environment.

关键词： Multimedia systems Streaming media Application software Multimedia databases distributed computing Protocols computer networks computer network reliability System testing Laboratories

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Unprecedented Smart Algorithm for Uninterrupted SDN Services During DDoS Attack

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computers, Materials & Continua 2022年第1期70卷 875-894页

作者： Muhammad Reazul Haque Saw Chin Tan Zulfadzli Yusoff Kashif Nisar Rizaludin Kaspin Iram Haider Sana Nisar J.P.C.Rodrigues Bhawani Shankar Chowdhry Muhammad AslamUqaili Satya Prasad Majumder Danda B.Rawat Richard Etengu Rajkumar Buyya Faculty of Computing&Informatics Multimedia UniversityPersiaranMultimediaCyberjaya63100SelangorMalaysia Faculty of Engineering Multimedia UniversityPersiaran MultimediaCyberjaya63100SelangorMalaysia Faculty of Computing and Informatics University Malaysia SabahJalan UMSKota Kinabalu Sabah88400Malaysia Telekom Malaysia Research&Development TM Innovation Centre63000CyberjayaSelangorMalaysia Federal University of Piauí(UFPI) TeresinaPIBrazil Instituto de Telecomunica珲es 6201-001Covilh?Portugal National Center of Robotics and Automation-Condition Monitoring Systems Lab MUETJamshoroPakistan Department of Electrical and Electronic Engineering BUETDhaka1205Bangladesh Department of Electrical Engineering and Computer Science Data Science and Cybersecurity CenterHoward UniversityWashingtonDCUSA Cloud Computing and Distributed Systems(CLOUDS)Laboratory School of Computing and Information SystemsThe University of MelbourneMelbourneVIC 3053Australia

In the design and planning of next-generation Internet of Things(IoT),telecommunication,and satellite communication systems,controller placement is crucial in software-defined networking(SDN).The programmability of the SDN controller is sophisticated for the centralized control system of the entire ***,it creates a significant loophole for the manifestation of a distributed denial of service(DDoS)attack ***,recently a distributed Reflected Denial of Service(DRDoS)attack,an unusual DDoS attack,has been ***,minimal deliberation has given to this forthcoming single point of SDN infrastructure failure ***,recently the high frequencies of DDoS attacks have increased *** this paper,a smart algorithm for planning SDN smart backup controllers under DDoS attack scenarios has *** proposed smart algorithm can recommend single or multiple smart backup controllers in the event of DDoS *** obtained simulated results demonstrate that the validation of the proposed algorithm and the performance analysis achieved 99.99%accuracy in placing the smart backup controller under DDoS attacks within 0.125 to 46508.7 s in SDN.

关键词： SDN smart algorithm RTZLK-DAASCP DDoS attack DRDoS

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Superconducting processors for HTMT: issues and challenges

Superconducting processors for HTMT: issues and challenges

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Frontiers of Massively parallel Computation

作者： K.B. Theobald G.R. Gao T.L. Sterling Computer Architecture and Parallel Systems Laboratory Department of Electrical and Computer Engineering University of Delaware Newark DE USA NASA Jet Propulsion Laboratory /Center for Advanced Computing Research California Institute of Technology Pasadena CA USA

The Hybrid Technology Multi-Threading project is a long-term study of the feasibility of combining several emerging technologies to reach 1 petaFLOPS within ten years. HTMT will combine high-speed superconductor processors, semiconductor memories with built-in processors, high-speed optical interconnects, and high-density holographic storage. While there are major challenges in all aspects of this project, those in processor architecture are the focus of this paper. Fundamental differences between RSFQ circuits and conventional semiconductor circuits, including a radical jump in clock speed, make today's processor design approaches inappropriate for HTMT. Sequential instruction dispatching, even within the lowest programming unit (a strand), will lead to unacceptably high latencies, hence poor performance. We propose alternative processor designs which use fine-grain synchronizations between individual instructions in order to avoid these bottlenecks.

关键词： Random access memory Optical buffering Holography Holographic optical components Delay computer architecture Optical interconnections electrical capacitance tomography Quantum computing Clocks

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Proactive and Automatic Underfrequency Load Shedding via PMUs and Particle Filters

arXiv

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arXiv 2023年

作者： Paramo, Gian Bretas, Arturo Bretas, Newton Electrical and Computer Engineering University of Florida GainesvilleFL United States Distributed Systems Group Pacifc Northwest National Laboratory RichlandWA United States Electrical and Computer Engineering University of Sao Paulo SP Sao Carlos Brazil

Underfrequency (UF) load shedding schemes are traditionally implemented in two ways: One approach is based on manual load shedding, with system operators requesting loads to be shed ahead of anticipated stressful operating conditions. Manual load shedding is usually done through phone calls. The second method is automatic load shedding via underfrequency relays. Using static settings, these schemes can be designed to operate in stages and drop previously identified loads. The main limitation of traditional load shedding schemes is that they are reactive and leave little room for optimized corrective actions. This work presents a proactive and automatic underfrequency load shedding solution for power systems. Measurements are captured via phasor measurement units (PMUs) at relatively low sampling rates of 30 Hz. These measurements are then processed by particle filters who predict the future state of the system’s frequency. Based on these predictions excess load is determined and shed. Comparative case studies are performed in simulated environments. Easy-to-implement models, without hard-to-derive parameters, highlight potential aspects for real-life implementation. © 2023, CC BY.

关键词： Phasor measurement units

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A comparison of Wireless Fidelity (Wi-Fi) fingerprinting techniques

A comparison of Wireless Fidelity (Wi-Fi) fingerprinting tec...

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International Conference on Information and Communication Technology Convergence (ICTC)

作者： Lersan B. Del Mundo Rafael Lean D. Ansay Cedric Angelo M. Festin Roel M. Ocampo Networks and Distributed Systems Laboratory Department of Computer Science University of the Philippines Diliman Quezon Philippines Computer Networks Lab Electrical and Electronics Engineering Institute University of the Philippines Diliman Quezon Philippines

Among several techniques proposed for indoor positioning using IEEE 802.11 Wireless Fidelity (Wi-Fi) based networks, those that rely on fingerprinting have been demonstrated to outperform those based on lateration, angulation, and cell of origin in terms of accuracy. We compare and evaluate three Wi-Fi fingerprinting techniques that use the K-Nearest Neighbor (k-NN), Naive Bayes Classifier (NBC) and Support Vector Machine (SVM) algorithms. Our experiments show that SVM-based fingerprinting outperformed both k-NN and NBC-based fingerprinting, achieving accuracies of 2 meters or better within our testbed.

关键词： Accuracy Support vector machines IEEE 802.11 Standards Vectors Databases Fingerprint recognition Kernel

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distributed Software-Defined Network Architecture for Smart Grid Resilience to Denial-of-Service Attacks

arXiv

引用

arXiv 2022年

作者： Agnew, Dennis Boamah, Sharon Mathieu, Reynold Cooper, Austin McNair, Janise Bretas, Arturo Department of Electrical and Computer Engineering University of Florida GainesvilleFL United States Distributed Systems Group Pacific Northwest National Laboratory RichlandWA United States

An important challenge for smart grid security is designing a secure and robust smart grid communications architecture to protect against cyber-threats, such as Denial-of-Service (DoS) attacks, that can adversely impact the operation of the power grid. Researchers have proposed using Software Defined Network frameworks to enhance cybersecurity of the smart grid, but there is a lack of benchmarking and comparative analyses among the many techniques. In this work, a distributed three-controller software-defined networking (D3-SDN) architecture, benchmarking and comparative analysis with other techniques is presented. The selected distributed flat SDN architecture divides the network horizontally into multiple areas or clusters, where each cluster is handled by a single Open Network Operating System (ONOS) controller. A case study using the IEEE 118-bus system is provided to compare the performance of the presented ONOS-managed D3-SDN, against the POX controller. In addition, the proposed architecture outperforms a single SDN controller framework by a tenfold increase in throughput;a reduction in latency of > 20%;and an increase in throughput of approximately 11% during the DoS attack scenarios. Copyright © 2022, The Authors. All rights reserved.

关键词： Cybersecurity

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parallel algorithms for simultaneous scheduling, binding and floorplanning in high-level synthesis

Parallel algorithms for simultaneous scheduling, binding and...

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IEEE International Symposium on Circuits and systems (ISCAS)

作者： P. Prabhakaran P. Banerjee Center for Reliable and High-Performance Computing Coordinated Science Laboratory University of Illinois Urbana-Champaign IL USA Center for Parallel and Distributed Computing Department of Electrical and Computer Engineering Northwestern University Evanston IL USA

With small device features in submicron technologies, interconnection delays play a dominant part in cycle time. Hence, it is important to consider the impact of physical design during high level synthesis. In comparison to a traditional approach which separates high-level synthesis from physical design, an algorithm which is able to make these stages interact very closely, would result in solutions with lower latency and area. However, such an approach could result in increased runtimes. parallel processing is an attractive way of reducing the runtimes. In this paper, two parallel algorithms for simultaneous scheduling, binding and floorplanning algorithm are presented. A detailed hardware model is considered, taking into account multiplexor and register areas and delays. Experimental results are reported on an IBM SP-2 multicomputer, with close to linear speedups for a set of benchmark circuits.

关键词： parallel algorithms High level synthesis Runtime Integrated circuit interconnections Delay effects Algorithm design and analysis parallel processing Scheduling algorithm Hardware Registers

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Ensuring quality of service for multimedia applications in a LAN environment

Ensuring quality of service for multimedia applications in a...

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IEEE International Symposim on High Assurance systems engineering

作者： H. Fahmi R.A. Paul A. Bashandy A. Ghafoor Distributed Multimedia Systems Laboratory School of Electrical and Computer Engineering Purdue University West Lafayette IN USA Testing and Evaluation Washington D.C. DC USA

We present a mechanism for dynamically allocating network resources in asynchronous LANs for supporting multimedia applications that require quality of service guarantee. The approach is based on the concept of time division multiple access (TDMA). It uses a centralized controller as the bandwidth manager. The total bandwidth is partitioned into two segments: one is used for serving multimedia connections and the other for the normal CSMA/CD sessions. Experimental results reveal that the performance of the proposed scheme is substantially better than that of the random access mechanism. In particular, transmission rates for multimedia hosts are improved significantly with low jitter variations in media streams.

关键词： Quality of service Local area networks Access protocols Time division multiple access Multiaccess communication Bandwidth Resource management Jitter Ethernet networks Asynchronous transfer mode

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Vision-Language Navigation: A Survey and Taxonomy

arXiv

引用

arXiv 2021年

作者： Wu, Wansen Chang, Tao Li, Xinmeng Yin, Quanjun Zhu, Jiancheng The College of Systems Engineering National University of Defense Technology Hunan Changsha410073 China National Key Laboratory of Parallel and Distributed Processing College of Computer Science and Technology National University of Defence Technology Changsha410073 China

Vision-Language Navigation (VLN) tasks require an agent to follow human language instructions to navigate in previously unseen environments. This challenging field involving problems in natural language processing, computer vision, robotics, etc., has spawn many excellent works focusing on various VLN tasks. This paper provides a comprehensive survey and an insightful taxonomy of these tasks based on the different characteristics of language instructions in these tasks. Depending on whether the navigation instructions are given for once or multiple times, this paper divides the tasks into two categories, i.e., single-turn and multi-turn tasks. For single-turn tasks, we further subdivide them into goal-oriented and route-oriented based on whether the instructions designate a single goal location or specify a sequence of multiple locations. For multi-turn tasks, we subdivide them into passive and interactive tasks based on whether the agent is allowed to question the instruction or not. These tasks require different capabilities of the agent and entail various model designs. We identify progress made on the tasks and look into the limitations of existing VLN models and task settings. Finally, we discuss several open issues of VLN and point out some opportunities in the future, i.e., incorporating knowledge with VLN models and implementing them in the real physical world. © 2021, CC BY.

关键词： Taxonomies

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