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IASTED International Conference on software engineering and Applications, SEA 2012

作者： Ezzati-Jivan, Naser Dagenais, Michel R. Department of Computer and Software Engineering Ecole Polytechnique de Montreal Montreal Canada

Trace data usually contains information about the underlying system execution such as running processes, memory usage, disk and file accesses and other runtime information. However, this raw data is not what the system administrators are looking for. For instance, in a multi-core system, the system administrator may need to know what is the utilization of each core or even what are the performance bottlenecks of the system. This analytical information is not available directly from the trace data and, in fact, is hidden behind the mountains of trace raw data. The trace data needs to be analyzed to extract the valuable information. Thus, efficient trace analysis tools and techniques need to be developed to handle large trace data and extract and provide useful and analytical information. In this paper, we propose a stateful trace analysis and abstraction approach that shares the computation and storage of the common information between parallel abstraction processes. This technique leads to relatively simple patterns compared to other pattern-based techniques. Furthermore, since it computes and stores the common state once, shared between related processes, it has a better computation and storage efficiency than stateless methods. The architecture of the method, its applications, and evaluation are detailed in this paper.

关键词： Trace analysis

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ConEx based QoE feedback to enhance QoS

ConEx based QoE feedback to enhance QoS

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2012 ACM Conference on the Capacity Sharing Workshop, CSWS 2012

作者： Shirazipour, Meral Charlot, Gregory Lefebvre, Geoffrey Krishnan, Suresh Pierre, Samuel Ericsson Research Packet Technologies Montreal Canada Ecole Polytechnique Department of Computer and Software Engineering Montreal Canada

ISBN: (纸本)9781450317801

Quality of service (QoS) generally represents the performance of packet networks. Quality of experience (QoE) defines the quality perceived by end-users of applications running on these networks. This paper relates these two metrics in a novel way using the newly defined congestion exposure (ConEx) mechanism. ConEx is an experimental protocol defined by the IETF that allows the sender of a flow to convey the received explicit congestion notification (ECN) information back into the network. In IPv6, ConEx is implemented in an option header with 28 unused bits. These bits can be used to convey more than ECN feedback towards the network. This paper proposes to use these bits to send real-time objective QoE information, as perceived by the end-users, into the network. Routers can leverage this information to adjust QoS mechanisms. As an example, a new queue management technique is proposed with a multi-field DiffServ classifier using the QoE metric. Simulation results show that this mechanism can help in improving the overall QoE of active flows. © 2012 ACM.

关键词： Quality of service

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An approach for designing and implementing middleware in wireless sensor networks

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Sensors and Transducers 2012年第SPEC. 2期14卷 150-163页

作者： Beaubrun, Ronald Llano-Ruiz, Jhon-Fredy Quintero, Alejandroale Department of Computer Science and Software Engineering Université Laval Quebec Qc Canada Department of Computer and Software Engineering École Polytechnique de Montréal Montreal Qc Canada

In this paper, we propose an approach for designing and implementing a middleware for data dissemination in Wireless Sensor Networks (WSNs). The designing aspect considers three perspectives: device, network and application. Each application layer is implemented as an independent Component Object Model (COM) Project which offers portability, security, reusability and domain expertise encapsulation. For result analysis, the percentage of success is used as performance parameter. Such analysis reveals that the middleware enables to greatly increase the percentage of success of the messages disseminated in a WSN. © 2012 IFSA.

关键词： Middleware

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A global planning model for survivable mobile networks

A global planning model for survivable mobile networks

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NETWORKS International Telecommunications Network Strategy and Planning Symposium

作者： Eunice Adjarath Lemamou Steven Chamberland Philippe Galinier Department of Computer and Software Engineering École Polytechnique de Montréal Montreal QUE Canada

In this paper, we propose a global model for WiMAX networks planning. This model consists in solving, in one shot, the network planning problem without dividing it in several subproblems. The objective of the model is to minimize the cost of the network while maximizing its survivability. The results show that the proposed model performs up to 40% better than the sequential one, which consists on solving the subproblems sequentially.

关键词： Planning Computational modeling WiMAX Mobile communication Mobile computing Quality of service Mathematical model

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Low cost fiber-to-the-node access network design

Low cost fiber-to-the-node access network design

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NETWORKS International Telecommunications Network Strategy and Planning Symposium

作者： Luis Cobo Steven Chamberland Annick Ntareme Department of Computer and Software Engineering École Polytechnique de Montréal Montreal QUE Canada

Considering the introduction of new internet protocol (IP) services, such as the high definition television (HDTV) over IP (IPTV) service, new network architectures and technologies should be introduced for the access network to improve the access rate. Actually, the best solution is to use the fiber-to-the-home (FTTH) architecture. However, this solution is still costly and cannot be widely deployed today. An interesting tradeoff is the fiber-to-the-node (FTTN) architecture, which reduces the copper portion of the access network. In this paper, we propose to tackle the FTTN network planning problem with the objective of minimizing the cost of the access network. An integer mathematical programming model is proposed for this problem. Next, a heuristic algorithm based on the tabu search principle is proposed to find “good” feasible solutions within a reasonable amount of computational time. Finally, numerical results are presented and analyzed.

关键词： Ducts Planning computer architecture Heuristic algorithms Algorithm design and analysis Copper Mathematical model

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A wireless sensor network deployment model with target localization constraints

A wireless sensor network deployment model with target local...

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NETWORKS International Telecommunications Network Strategy and Planning Symposium

作者： Steven Chamberland Luis Cobo Fatima Mourchid Alejandro Quintero Department of Computer and Software Engineering École Polytechnique de Montréal Montreal QUE Canada

In this paper, we tackle the wireless sensor network (WSN) planning problem considering coverage, target localization and network connectivity constraints. First, a combinatorial optimization model is proposed for this problem and next, a starting greedy heuristic is proposed followed by a tabu search metaheuristic to find “good” feasible solutions rapidly. The solutions are compared to the optimal solutions found using CPLEX. The test results show the proposed approach finds good quality solutions.

关键词： Wireless sensor networks Atmospheric modeling Biological system modeling Optimization Planning Capacitive sensors

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Adapting software product lines for complex certifiable avionics software

Adapting software product lines for complex certifiable avio...

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2012 3rd International Workshop on Product LinE Approaches in software engineering, PLEASE 2012

作者： Sozen, Neset Merlo, Ettore CMC Electronics Inc. Esterline Saint-Laurent QC H4M 2S9 Canada Department of Computer and Software Engineering Polytechnique de Montreal Montreal QC H3C 3A8 Canada

ISBN: (纸本)9781467317511

In avionics, the size and complexity of softwareintensive systems increased considerably during recent years. Besides the size and the complexity, certification constraints also had negative impact on the cost and schedule of avionics software projects. Model-Driven Development (MDD) and software Product Lines engineering (SPLE) offer an opportunity to improve the avionics software development process, reduce the cost and improve the time to market. Complexity of avionics software and certification constraints pose several challenges to SPLE adoption. software Product Lines (SPL) framework must provide bi-directional traceability between requirements and low level software assets (e.g. code and test), facilitate production of certification deliverables, allow validation on the target platform and provide code coverage. Also, SPL offer a scheme to manage the complexity of avionics software systems through variability management tools. © 2012 IEEE.

关键词： Avionics

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Characterization by magnetophoresis of therapeutic microcarriers relying on embedded nanoparticles to allow navigation in the vascular network

Characterization by magnetophoresis of therapeutic microcarr...

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International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)

作者： Guillermo Vidal Sylvain Martel NanoRobotics Laboratory Department of Computer and Software Engineering École Polytechnique de Montréal Montreal Canada

In this paper a magnetophoretic chamber design is presented as a tool to evaluate the deflection patterns of magnetic microcarriers compatible with Magnetic Resonance Navigation (MRN) for drug delivery applications. Such micro-entities with different magnetic characteristics and subject to the force of a fluid flow show different deflection patterns while the effects of aggregations under different fluid flow velocities are critical to estimate the most adequate MRN strategy. Preliminary results indicate that the system and the corresponding methods presented here could become a practical tool to characterize the magnetophoretic behaviors of such microcarriers intended for navigation in the vascular network.

关键词： Magnetic resonance imaging Perpendicular magnetic recording Soft magnetic materials Magnetic separation Magnetostatics Nanoparticles Micromagnetics

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Adapting software Product Lines for complex certifiable avionics software

Adapting Software Product Lines for complex certifiable avio...

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International Workshop on Product Line Approaches in software engineering (PLEASE)

作者： Neset Sozen Ettore Merlo CMC Electronics inc. Esterline Saint-Laurent QUE Canada Department of Computer and Software Engineering Polytechnique de Montreal Montreal QUE Canada

In avionics, the size and complexity of software-intensive systems increased considerably during recent years. Besides the size and the complexity, certification constraints also had negative impact on the cost and schedule of avionics software projects. Model-Driven Development (MDD) and software Product Lines engineering (SPLE) offer an opportunity to improve the avionics software development process, reduce the cost and improve the time to market. Complexity of avionics software and certification constraints pose several challenges to SPLE adoption. software Product Lines (SPL) framework must provide bi-directional traceability between requirements and low level software assets (e.g. code and test), facilitate production of certification deliverables, allow validation on the target platform and provide code coverage. Also, SPL offer a scheme to manage the complexity of avionics software systems through variability management tools.

关键词： software Aerospace electronics Complexity theory Aircraft Military aircraft Programming Consumer electronics

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Locating features in dynamically configured avionics software 12

Locating features in dynamically configured avionics softwar...

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International Conference on software engineering (ICSE)

作者： Maxime Ouellet Ettore Merlo Neset Sozen Martin Gagnon Computer and Software Engineering Department École Polytechnique de Montréal Montreal Canada CMC Electronics Inc. Saint-Laurent Canada

ISBN: (纸本)9781467310673

Locating features in software is an important activity for program comprehension and to support software reengineering. We present a novel automated approach to locate features in source code based on static analysis and model checking. The technique is aimed at dynamically configured software, which is software in which the activation of specific features is controlled by configuration variables. The approach is evaluated on an industrial avionics system.

关键词： software Aerospace electronics Analytical models Security Aircraft Information retrieval Feature extraction

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