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2005 IEEE 61st Vehicular Technology Conference -VTC 2005 - Spring Stockholm: Paving the Path for a Wireless Future

作者： Kim, Eun Yong Chun, Joohwan Scientific Computing Lab. Department of Electrical Engineering and Computer Science Korea Advanced Institute of Science and Technology Daejeon Korea Republic of

We propose a new random beamforming technique in forward link multiuser MIMO systems that exploits efficient multiuser diversity and spatial multiplexing gain. The common channels are allocated to more than one user simultaneously and multiple antennas at the receivers are used for interference nulling, resulting in higher throughput and reduced average waiting time. We show that the throughput of the proposed scheme outperforms the upper bound of the conventional scheme. © 2005 IEEE.

关键词： Communication channels (information theory)

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Owl: Next generation system monitoring

Owl: Next generation system monitoring

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2005 computing Frontiers Conference

作者： Schulz, Martin Lee, Hsien-Hsin S. White, Brian S. McKee, Sally A. Jeitner, Jürgen Center for Applied Scientific Computing Lawrence Livermore National Laboratory School of Electrical and Computer Engineering Georgia Institute of Technology Computer Systems Lab. Cornell University Department of Informatics Technische Universität München

ISBN: (纸本)1595930183

As microarchitectural and system complexity grows, comprehending system behavior becomes increasingly difficult, and often requires obtaining and sifting through voluminous event traces or coordinating results from multiple, non-localized sources. Owl is a proposed framework that overcomes limitations faced by traditional performance counters and monitoring facilities in dealing with such complexity by pervasively deploying programmable monitoring elements throughout a system. The design exploits reconfigurable or programmable logic to realize hardware monitors located at event sources, such as memory buses. These monitors run and writeback results autonomously with respect to the CPU, mitigating the system impact of interrupt-driven monitoring or the need to communicate irrelevant events to higher levels of the system. The monitors are designed to snoop any kind of system transaction, e.g., within the core, on a bus, across the wire, or within I/O devices. Copyright 2005 ACM.

关键词： Monitoring

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Resource allocation for periodic applications in a shipboard environment

Resource allocation for periodic applications in a shipboard...

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19th IEEE International Parallel and Distributed Processing Symposium, IPDPS 2005

作者： Shestak, Vladimir Chong, Edwin K. P. Maciejewski, Anthony A. Siegel, H.J. Benmohamed, Lotfi Wang, I.-Jeng Daley, Rose Colorado State University Department of Electrical and Computer Engineering Fort Collins CO 80523-1373 Colorado State University Department of Computer Science Fort Collins CO 80523-1373 Johns Hopkins University Applied Physics Laboratory 11100 Johns Hopkins Road Laurel MD 20723-6099 Department of Electrical and Computer Engineering Colorado State University Department of Electrical and Computer Engineering Department of Mathematics Colorado State University IEEE Colorado State University Department of Computer Science ACM Eta Kappa Nu Electrical Engineering Honor Society Sigma Xi Science Honor Society Upsilon Pi Epsilon Computing Sciences Honor Society Johns Hopkins University Applied Physics Laboratory JHU/APL Applied Physics Lab. IR and D

ISBN: (纸本)0769523129

Providing efficient workload management is an important issue for a large-scale heterogeneous distributed computing environment where a set of periodic applications is executed. The considered distributed system is expected to operate in an environment where the input workload is likely to change unpredictably, possibly invalidating a resource allocation that was based on the initial workload estimate. The tasks consist of multiple application strings, each made up of an ordered sequence of applications. There are quality of service (QoS) constraints that must be satisfied for each string. This work addresses the problem of finding a robust initial allocation of resources to application strings that is able to absorb some level of unknown input workload increase without rescheduling. An allocation feasibility analysis is presented followed by four heuristics for finding a near-optimal allocation of resources. The performance of the proposed heuristics is evaluated and compared using simulation. The proposed heuristics also are compared to a mathematically derived upper bound. © 2005 IEEE.

关键词： Resource allocation

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An 8 GHz ultra wideband transceiver prototyping testbed

An 8 GHz ultra wideband transceiver prototyping testbed

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International Workshop on Rapid System Prototyping (RSP)

作者： D. Agarwal C.R. Anderson P.M. Athanas Configurable Computing Lab Virginia Polytechnic Institute and State University Blacksburg VA USA Mobile and Portable Radio Research Group Bradley Department of Electrical Computer Engineering Virginia Polytechnic Institute and State University Blacksburg VA USA

Software defined radios have the potential of changing the fundamental usage model of wireless communications devices, but the capabilities of these transceivers are often limited by the speed of the underlying processors and FPGAs. This paper presents a testbed for the design of an impulse-based ultra wideband communication system. The transceiver is being developed using software/reconfigurable radio concepts and will be implemented using commercially available off-the-shelf components. The receiver uses eight 1 GHz ADCs to perform time interleaved sampling at an aggregate rate of 8 Gsamples/s. The high sampling rates present extraordinary demands on the down-conversion resources. The output of each ADC is in a different clock domain, with clocks offset in increments of 125 ps. Samples are captured by the high-speed ADC and processed using a Xilinx Virtex-II Pro (XC2VP70) FPGA. The testbed has two components: a non-real time part for data capture and signal acquisition, and a real-time part for data demodulation and signal processing. The non-real time component uses the internal block RAMs to store a set of samples and one of the PowerPC cores to process the data offline, to minimize logic resource usage. The real-time part uses distributed memory to store incoming data and processes it using hardwired multipliers and FPGA logic cells. The overall objective is to demonstrate a testbed that will allow researchers to evaluate different UWB modulation, multiple access, and coding schemes, and will support raw data rates of up to 100 MB/s.

关键词： Ultra wideband technology Transceivers Prototypes Testing Field programmable gate arrays Software radio Sampling methods Clocks Signal processing Logic

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A novel personal authentication system using palmprint technology

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1st International Conference on Pattern Recognition and Machine Intelligence, PReMI 2005

作者： Zhang, David Lu, Guangming Kong, Adams Wai-Kin Wong, Michael Biometric Research Centre Department of Computing Hong Kong Polytechnic University Kowloon Hong Kong Biocomputing Research Lab School of Computer Science and Engineering Harbin Institute of Technology Harbin China Electrical and Computer Engineering University of Waterloo Ontario N2L 3G1 Canada

ISBN: (纸本)3540305068

In recent times, an increasing, worldwide effort has been devoted to the development of automatic personal identification systems that can be effective in a wide variety of security contexts. Palmprints have a number of unique advantages: they are rich in features such as principal lines, wrinkles, and textures and these provide stable and distinctive information sufficient for separating an individual from a large population. In this paper, we present a novel biometric authentication system to identify a person's identity by his/her palmprint. Being a robust and reliable system, it was tested by more than 8,000 palmprint images with very low false acceptance rate (0.02%), and a relative high genuine acceptance rate (98.83%). The whole authentication process is less than 1 second. Finally, some possible applications are discussed which could be benefited by using palmprint technology. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Security of data

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Processor allocation for tasks that is robust against errors in computation time estimates

Processor allocation for tasks that is robust against errors...

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19th IEEE International Parallel and Distributed Processing Symposium, IPDPS 2005

作者： Sugavanam, Prasanna V. Siegel, H.J. Maciejewski, Anthony A. Ali, Syed Amjad Al-Otaibi, Mohammad Aydin, Mahir Guru, Kumara Horiuchi, Aaron Krishnamurthy, Yogish G. Lee, Panho Mehta, Ashish Oltikar, Mohana Pichel, Ron Pippin, Alan J. Raskey, Michael Shestak, Vladimir Zhang, Junxing Colorado State University Department of Electrical and Computer Engineering Fort Collins CO 80523-1373 Colorado State University Department of Computer Science Fort Collins CO 80523-1373 Hewlett-Packard Company Systems and VLSI Technology Division Fort Collins CO 80528 Hewlett-Packard Company Linux and Open Source Lab. Fort Collins CO 80528 University of Utah School of Computing Salt Lake City UT 84112 Colorado State University IEEE Department of Computer Science ACM Eta Kappa Nu Electrical Engineering Honor Society Sigma Xi Science Honor Society Upsilon Pi Epsilon Computing Sciences Honor Society Department of Electrical and Computer Engineering IBM Department of Computer Science New Mexico Institute of Mining and Technology Premiere Systems Fairfax VA CSU Hewlett Packard Hewlett-Packard Company Systems-VLSI Lab. Hewlett-Packard Fort Collins CO Hewlett-Packard Company Fort Collins CO School of Computing University of Utah

ISBN: (纸本)0769523129

Heterogeneous computing systems composed of interconnected machines with varied computational capabilities often operate in environments where there may be sudden machine failures, higher than expected load, or inaccuracies in estimation of system parameters, Makespan (defined as the completion time for an entire set of tasks) is often the performance feature that is optimized in such systems. It is important that the makespan of a resource allocation (mapping) be robust against errors in task computation time estimates. The problem of optimally mapping tasks onto machines of a heterogeneous computing environment has been shown, in general, to be NP-complete. Therefore, heuristic techniques to find near optimal solutions to this mapping problem are required. The goal of this research is to find a static mapping of tasks so that the robustness of the desired system feature, makespan, is maximized against the errors in task execution time estimates. Seven heuristics to derive near-optimal solutions and an upper bound to this problem are presented and evaluated.

关键词： Resource allocation

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Exception handling in distributed workflow systems using mobile agents

Exception handling in distributed workflow systems using mob...

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IEEE International Conference on e-Business engineering (ICEBE)

作者： Jiannong Cao Jin Yang Wai Ting Chan C. Xu Internet and Mobile Computing Lab Department of Computing Hong Kong Polytechnic University Kowloon Hong Kong China Cluster and Internet Computing Laboratory Department of Electrical and Computer Engineering Wayne State University Detroit MI USA

Workflow management systems (WfMSs) are software systems used to automate, coordinate and streamline business processes of organizations. Most existing research on WfMSs has been focused on workflows based on well-structured and well-behaved business processes. Although its importance has been recognized, only recently, modeling and handling of workflow exceptions has been tackled by the workflow community. In this paper, we propose a mobile agent based approach to handling exceptions in distributed workflow management systems. Mobile agents are dispatched to find out the status of running processes in the system to keep track and troubleshoot them when necessary. We describe the classification of workflow exceptions into hierarchical levels and the corresponding design of different types of exception-handling mobile agents and their cooperation. A prototype of the mobile agent-based workflow exception handling mechanism has been implemented using the IBM Aglet platform

关键词： Mobile agents Workflow management software Humans Internet Software systems Application software Mobile computing Prototypes Technology management Office automation

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Opportunistic performance enhancement of reservation multiple access protocols of wireless broadband networks

Opportunistic performance enhancement of reservation multipl...

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International Conference on Broadband Networks (BroadNets)

作者： A. Doha H. Hassanein Telecommunications Research Lab Department of Electrical and Computer Engineering Queen's University ONT Canada Telecommunications Research Lab School of Computing Queen's University ONT Canada

Most of today's broadband networks, including the recently ratified IEEE 802.16 standard, employ reservation based multiple media access control. A problem pertinent to reservation MAC protocols is the division of frame slots between the contention and data transmission processes. In most of the reservation MAC protocols no specific ratio is standardized, leaving proprietary solutions address the local network environment. As both processes are equally important for maintaining efficient delay and throughput performance, a solution must consider the timely varying traffic load. For example, heterogeneity and cooperation of networks promote access technologies that can sustain waves of increasing traffic load. In this paper, we start by instituting a framework for efficient allocation of frame resources to the contention and data transmission processes in light of the delay and throughout performance. We then propose a dynamic resource allocation controller based on a Markovian optimization model, where the optimization parameters are tuned according to specific preferential criteria of service providers. Our model achieves opportunistic performance improvements, on a per frame basis, over the best-case static allocation. Through simulation, we study the merits of our proposed optimized controller with respect to the framework. We show by illustrative examples and numerical results that the controller successfully fulfills the framework objectives.

关键词： Access protocols Broadband communication Delay Media Access Protocol Data communication Throughput Telecommunication traffic Resource management Hybrid fiber coaxial cables Time division multiple access

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On reducing the operational cost of bandwidth adaptation algorithms

On reducing the operational cost of bandwidth adaptation alg...

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International Conference on Broadband Networks (BroadNets)

作者： A.-E.M. Taha H.S. Hassanein H.T. Mouftah Telecommunications Research Lab Department of Electrical and Computer Engineering Queen's University Kingston ONT Canada School of Computing Queen's University Kingston ONT Canada Center for Research in Photonics School of Information Technology and Engineering Ottawa University Ottawa ONT Canada

Bandwidth adaptation algorithms (BAA) assume an integral role in radio resource management (RRM) frameworks for future wireless networks. Taking advantage of the nature of adaptive multimedia application, they empower system providers with allocation versatility and economic increase. Due to the dynamic nature to be witnessed in future networks, BAA has been set to be trigger at every change in the system state. This burdens the different entities involved in RRM. In this work, the concept of stochastically triggered BAA (STBAA) is proposed. The tradeoff between admission ratios and users satisfaction is evaluated. It is found that considerable gains can still be achieved with the adaptation not fully engaged

关键词： Costs Bandwidth Resource management Wireless networks Multimedia systems Linear programming Quality of service Performance evaluation Call admission control Radio control

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Journal of Information Science and engineering: Editorial notice

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Journal of Information Science and engineering 2005年第5期21卷 i-ii页

作者： Lee, Der-Tsai Amato, Nancy M. Chang, Shih-Fu Chen, Homer H. Chen, Tsuhan Hsu, Tsan-Sheng Hwang, Jenq-Neng Kuo, Sy-Yen Kuo, Tei-Wei Li, Chung-Sheng Tokuyama, Takeshi Wing, Jeannette Wu, Tzong-Chen Yen, John Computer Science at Texas A and M University United States Parasol Laboratory United States IEEE Transactions on Parallel and Distributed Systems Computing Research Association's Committee on the Status of Women in Computing Research CRA-W's Distributed Mentor Program United States Department of Electrical Engineering Columbia University United States Lab. United States College of Electrical Engineering and Computer Science National Taiwan University Taiwan IEEE Transactions on Circuits and Systems for Video Technology IEEE Department of Electrical and Computer Engineering Carnegie Mellon University Pittsburgh PA United States ACM ACM SIGACT IEEE Computer Society IICM Austria Research and Development of the Department Multimedia Signal Processing Technical Committee IEEE Signal Processing Society United States IEEE Transactions on Circuits and systems for Video Technology College of Electrical Engineering and Computer Science National Taiwan Ocean University Keelung Taiwan Department of Electrical Engineering National Taiwan University Taiwan Department of Computer Science and Information Engineering National Taiwan University Taipei Taiwan IEEE Technical Committee on Real-Time Systems Computer Science Division IBM T.J. Watson Research Center United States IBM Research Division Graduate School of Information Sciences Tohoku University Japan ACM IPSJ Mathematical Society of Japan Japan Department of Computer Science Computer Science Department Carnegie Mellon University United States National Academies of Science's Computer Science and Telecommunications Board United States Microsoft's Trustworthy Academic Advisory Board Intel Research Pittsburgh's Advisory Board United States Dartmouth's Institute for Security Technology Studies Advisory Committee Canada Sloan Research Fellowships Program Committee United States ACM Taiwan China Information Sciences and Technology Pennsylvania State University United States Laboratory for Intelligent Agents Penn State's School of Info

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