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Availability-constrained Dedicated Segment Protection in circuit switched mesh networks

Availability-constrained Dedicated Segment Protection in cir...

引用

International Conference on Ultra Modern Telecommunications and Workshops (ICUMT)

作者： P. Babarczi J. Tapolcai Pin-Han Ho Department of Telecommunications and Media Informatics Budapest University슠of슠Technology슠and슠Economics Hungary Department of Electrical and Computer Engineering University of Waterloo Canada

In this paper, a novel availability-constrained survivable routing algorithm, called generalized dedicated protection (GDP), is introduced for circuit switched mesh networks. The goal of the algorithm is minimizing the cost of reserved bandwidth for protection purposes while a predefined connection availability is guaranteed. The paper gives a formal description of the working and dedicated protection paths/segments allocation problem with connection availability constraints. Firstly, a connection availability evaluation method is proposed for modeling dependent or independent failures based on state enumeration. Secondly, it is shown that GDP is NP-complete even when splitting the traffic on multiple routes is allowed, and formulated as an integer linear program (ILP). Finally, simulation is conducted to verify the proposed availability evaluation method, and the GDP protection algorithms with their existing counterparts.

关键词： Protection Switching circuits Mesh networks Availability Economic indicators Bandwidth Telecommunication switching Quality of service Digital signal processing Informatics

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On Monitoring and Failure Localization in Mesh All-Optical Networks

On Monitoring and Failure Localization in Mesh All-Optical N...

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IEEE Annual Joint Conference: INFOCOM, IEEE computer and Communications Societies

作者： J. Tapolcai B. Wu P.-H. Ho Department of Telecommunications and Media Informatics Budapest University슠of슠Technology슠and슠Economics Hungary Department of Electrical and Computer Engineering University of Waterloo Canada

ISBN: (纸本)9781424435128

Achieving fast and precise failure localization has long been a highly desired feature in all-optical mesh networks. M-trail (monitoring trail) has been proposed as the most general monitoring structure for achieving unambiguous failure localization (UFL) of any single link failure while effectively reducing the amount of alarm signals flooded in the networks. However, it is critical to come up with a fast and intelligent m-trail design approach for minimizing the number of m-trails and the totally consumed bandwidth, which ubiquitously determines the length of alarm code and bandwidth overhead for the M-trail deployment, respectively. In this paper, the m-trail design problem is investigated. To gain deeper understanding of the problem, we firstly conduct a bound analysis on the minimum length of alarm code required for UFL. Then, a novel algorithm based on random code assignment (RCA) and random code swapping (RCS) is developed for solving the m-trail design problem. The algorithm prototype can be found in. The algorithm is verified by comparing with an integer linear program (ILP), and the results demonstrate its superiority in minimizing the fault management cost and bandwidth consumption while achieving significant reduction in computation time. To investigate the impact of topology diversity, extensive simulation is conducted on thousands of random network topologies with systematically increased network connectivity. Lastly, we provide abundant discussions and interesting conclusive remarks that position our discoveries.

关键词： Condition monitoring All-optical networks Bandwidth Network topology computerized monitoring computer networks Shape Algorithm design and analysis Communications Society Informatics

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Hybrid Mode History Table-Based Fast Mode Decision Algorithm for Mobile Devices

Hybrid Mode History Table-Based Fast Mode Decision Algorithm...

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International Conference on computer Sciences and Convergence Information technology (ICCIT)

作者： Yong-goo Kim Younghun Jo Neungsoo Park Yungho Choi Media Engineering Korean German Institute Of Technology Seoul South Korea Computer Science and Engineering Department Konkuk University Seoul South Korea Electrical Engineering Department Konkuk University Seoul South Korea

This paper proposes a novel scheme to significantly reduce mode decision time by predicting optimal mode candidates. Unlike previous fast mode decision algorithms computing RDcost in a pre-defined mode order, the proposed scheme predicts optimal mode candidates and calculates their RDcosts first, increasing the possibility to satisfy early-exit conditions sooner, resulting in fast mode decision. This H.264 mode decision time reduction enables small computing power mobile devices to handle H.264 encoding effectively. Extensive simulations show that, when compared with JM11.0, the proposed scheme boosts H.264 encoding speed by up to 322% with a reasonable image quality degradation.

关键词： History Encoding Mobile computing Power engineering computing Image quality Video compression Image storage Information technology computer science Computational modeling

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Re-estimation of linear predictive parameters in sparse linear prediction

Re-estimation of linear predictive parameters in sparse line...

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Asilomar Conference on Signals, Systems & computers

作者： Daniele Giacobello Manohar N. Murthi Mads Græsbøll Christensen Søren Holdt Jensen Marc Moonen Department of Electronic Systems University of Aalborg Aalborg Denmark Department of Electrical and Computer Engineering University of Miami USA Department of Media Technology University of Aalborg Aalborg Denmark Department of Electrical Engineering Katholieke Universiteit Leuven Leuven Belgium

ISBN: (纸本)9781424458257

In this work, we propose a novel scheme to re-estimate the linear predictive parameters in sparse speech coding. The idea is to estimate the optimal truncated impulse response that creates the given sparse coded residual without distortion. An all-pole approximation of this impulse response is then found using a least square approximation. The all-pole approximation is a stable linear predictor that allows a more efficient reconstruction of the segment of speech. The effectiveness of the algorithm is proved in the experimental analysis.

关键词： Speech coding Least squares approximation Speech synthesis Speech analysis Vectors Linear programming Algorithm design and analysis Decoding Encoding Contracts

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A novel online test-sheet composition approach for web-based testing

A novel online test-sheet composition approach for web-based...

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IEEE International Symposium on Information (IT) in Medicine and Education, ITME

作者： Feng-Rui Wang Wen-Hong Wang Quan-Ke Pan Feng-Chao Zuo J. J. Liang School of Media and Communications Technology Liaocheng University Liaocheng China School of Computer Science Liaocheng University Liaocheng China School of Electrical Engineering Zhengzhou University Zhengzhou China

In e-learning environment, Web-based testing system can help to evaluate learners learning status precisely. To meet the needs of multiple assessment criteria, a new test-sheet construction model was proposed. Based on the proposed model, a differential evolution algorithm with effective coding strategy was designed to generate high quality test-sheets for Web- based testing. In simulation experiments, the proposed algorithm was applied to a series of item banks with different scales. Superiority of the proposed algorithm is demonstrated by comparing it with the simple genetic algorithm and differential evolution algorithm with binary coding strategy.

关键词： System testing Electronic learning Algorithm design and analysis Genetic algorithms Automatic testing Communications technology computer science Machine learning Particle swarm optimization Optimization methods

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Neural Network Based MIMO-OFDM Channel Equalizer Using Comb-Type Pilot Arrangement

Neural Network Based MIMO-OFDM Channel Equalizer Using Comb-...

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International Conference on Future computer and Communication, ICFCC

作者： Syed Junaid Nawaz Sajjad Mohsin Ataul Aziz Ikaram Department of Electrical Engineering Federal Urdu University of Arts Science and Technology Islamabad Pakistan Department of Electrical Engineering Federal Urdu University for Arts Science& Technology Islamabad PAKISTAN Department of Computer Sciences COMSATS Institute of Information Technology Islamabad PAKISTAN Dept. of Electr. Eng. Fed. Urdu Univ. for Arts Sci. & Technol. Islamabad Pakistan

MIMO (multiple input multiple output) and OFDM (orthogonal frequency division multiplexing) bringing along a number of pros; a combination of both stands a good possibility of being the next-generation (4th generation) of mobile wireless systems. The technology however imposes a challenge that is the increased complexity of channel equalization. Wireless channels are multipath fading channels, causing deformation in the signal. To remove the effect (imposed by channel) from received signal, the receiver needs to have knowledge of CIR (Channel impulse response) that is usually provided by a separate channel estimator. This paper is aimed at exploring the use of Neural Network (NN) as a tool for MIMO-OFDM channel estimation and compensation. The research attempts to gauges the usefulness of proposed system by analyzing different algorithms to train NN. Further to ascertain the performance of the proposed technique; length of the known training sequence has been varied over a reasonable range and observations are made. Finally, the results obtained by using different algorithms for training NN have been compared with each-other and against the traditional least squares channel estimator, which along with observations/comments form part of the paper.

关键词： Neural networks Equalizers MIMO OFDM Receiving antennas Intersymbol interference computer networks Art Fading Channel estimation

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Distributed Randomized PageRank Computation Based on Web Aggregation

Distributed Randomized PageRank Computation Based on Web Agg...

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Joint 48th IEEE Conference on Decision and Control and 28th Chinese Control Conference

作者： Hideaki Ishii Roberto Tempo Er-Wei Bai Fabrizio Dabbene the Department of Computational Intelligence and Systems Science Tokyo Institute of Technology IEIIT-CNR Politecnico di Torino the Department of Electrical and Computer Engineering The University of Iowa4316 Seamans Center for the Engineering Arts and Sciences

The so-called PageRank algorithm has been used at Google for properly ranking search *** quantifies the importance of each page by the structure of links in the *** our recent work,we have proposed a distributed randomized approach for the PageRank computation,where the pages find their own values by communicating with linked *** paper builds upon this approach to improve the computation and communication load for the algorithm by systematically aggregating the webpages while maintaining performance.

关键词： PageRank Distributed Randomized PageRank Computation Based on Web Aggregation Web

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Hybrid test vector compression in system-on-chip test — An overview and methodology

Hybrid test vector compression in system-on-chip test — An ...

引用

International Conference on computers and Devices for Communication (CODEC)

作者： Satyendra N. Biswas Sunil R. Das Emil M. Petriu Altaf Hossain Department of Electrical Engineering Technology Georgia Southern University Statesboro GA USA School of Information Technology and Engineering Faculty of Engineering University of Ottawa Ottawa ONT Canada Department of Computer and Information Science College of Arts and Sciences Troy University Montgomery AL USA

This paper presents a comprehensive study on a number of hybrid test vector compression methods for VLSI circuit testing. In the proposed approaches, a software program is loaded into the on-chip processor memory along with the compressed test data sets. To minimize on-chip storage besides testing time, the test data volume is first reduced by compaction in a hybrid manner before downloading into the processor. The methods utilize a set of adaptive coding techniques for realizing lossless compression. The compaction program need not be loaded into the embedded processor, as only the decompression of test data is required for the automatic test equipment. The developed schemes necessitate minimal hardware overhead, while the on-chip embedded processor can be reused for normal operation on completion of testing. As an extension of the earlier works, this paper also reports further results on studies of the problem and demonstrates the feasibility of the suggested methodologies with simulation results on ISCAS 85 combinational and ISCAS 89 full scan sequential benchmark circuits.

关键词： System testing System-on-a-chip Circuit testing Compaction Very large scale integration Software testing Adaptive coding Automatic testing Automatic test equipment Hardware

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CFP: Cooperative Fast Protection

CFP: Cooperative Fast Protection

引用

IEEE Annual Joint Conference: INFOCOM, IEEE computer and Communications Societies

作者： B. Wu P.-H. Ho K. L. Yeung J. Tapolcai H. T. Mouftah The Department of Electrical and Computer Engineering University of Waterloo Waterloo ONT Canada The Department of Electrical and Electronic Engineering University of Hong Kong Hong Kong China The Department of Telecommunications and Media nformatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary The School of Information Technology and Engineering (SITE) University of Ottawa Ottawa ONT Canada

ISBN: (纸本)9781424435128

We introduce cooperative fast protection (CFP) as a novel protection scheme in WDM networks. CFP achieves capacity-efficient fast protection with the features of node-autonomy and failure-independency. It differs from p-cycle by reusing the released working capacity of the disrupted lightpaths (i.e. stubs) in a cooperative manner. This is achieved by allowing all the failure-aware nodes to switch the traffic, such that the disrupted lightpaths can be protected even if the end nodes of the failed link are not on the protecting cycles. CFP also differs from FIPP p-cycle by not requiring the source node of the disrupted lightpath on the protecting cycle. By jointly optimizing both working and spare capacity placement, we formulate an ILP for CFP design. Numerical results show that CFP significantly outperforms p-cycle by achieving faster protection with much higher capacity efficiency.

关键词： Protection Peer to peer computing Switches Optical network units WDM networks Communications Society Telecommunication traffic Design optimization Wavelength division multiplexing Informatics

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Robot cooperation without explicit communication by fuzzy signatures and decision trees

Robot cooperation without explicit communication by fuzzy si...

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Joint 2009 International Fuzzy Systems Association World Congress, IFSA 2009 and 2009 European Society of Fuzzy Logic and technology Conference, EUSFLAT 2009

作者： Ballagi, Áron Kóczy, László T. Gedeon, Tamás D. Department of Automation Széchenyi István University Egyetem tér 1 H-9026 Gyor Hungary Inst. of Mechanical Electrical Engineering and Information Technology Széchenyi István University Egyetem tér 1 H-9026 Gyor Hungary Department of Telecommunications and Media Informatics Budapest University of Technology and Economics Magyar tudósok krt. 2 H-1117 Budapest Hungary Department of Computer Science Australian National University Canberra ACT Australia

ISBN: (纸本)9789899507968

This paper presents a novel action selection method for multi robot task sharing problem. Two autonomous mobile robots try to cooperate for push a box to a goal position. Both robots equipped with object and goal sensing, but do not have explicit communication ability. We explore the use of fuzzy signatures and decision making system to intention guessing and efficient action selection. Virtual reality simulation is used to build and test our proposed algorithm.

关键词： Mobile robots

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