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international conference on communication systems software and middleware (COMSWARE)

作者： W. Colitti K. Steenhaut Ann Nowe ETRO Department and COMO Lab Erasmushogeschool Brussel Vrije Universiteit Brussel Belgium

The automatically switched optical networks (ASONs) and the generalized multi protocol label switching (GMPLS) control plane are envisaged to play an important role in the next generation Internet. ASON/GMPLS networks enable the multilayer traffic engineering (MTE) paradigm which facilitates the interaction between the IP and the dense wavelength division multiplexing (DWDM) layers. In such dynamic scenario the lightpaths are considered to be on-demand services rather than static aggregation core pipes and therefore the quality of service (QoS) and the service differentiation (DiffServ) are issues to be addressed in both IP and optical layer and preferably in an integrated fashion. This paper proposes a DiffServ scheme for ASON/GMPLS networks which logically divides the IP/MPLS virtual topology into two virtual topologies used to carry high priority and low priority traffic, respectively. The control plane uses different routing/grooming and topology reconfiguration strategies offering more stability - and therefore strict QoS commitments - to the topology carrying high priority traffic. The fairness problem is also addressed by defining a parameter that allows the operator to control the quantity of resources assigned to the two virtual topologies. The performance of the proposed scheme has been evaluated by means of a simulation study.

关键词： Nonhomogeneous media Diffserv networks Internet Network topology communication system traffic control Quality of service Wavelength division multiplexing Optical fiber networks Protocols Automatic generation control

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Performance engineering of replica voting protocols for high assurance data collection systems

Performance engineering of replica voting protocols for high...

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international conference on communication systems software and middleware (COMSWARE)

作者： K. Ravindran Jiang Wu M. Rabby K. A. Kwiat A. Sabbir City College and Graduate Center City University of New York New York NY USA US Air Force Research Laboratory Rome NY USA Independent University of Bangladesh Dhaka Bangladesh

Real-time data collection in a distributed embedded system requires dealing with failures such as data corruptions by malicious devices and arbitrary message delays in the network. Replication of data collection devices is employed to deal with such failures, with voting among the replica devices to move a correct data to the end-user. Here, the data being voted upon can be large-sized and/or take long time to be compiled (such as images in a terrain surveillance system and transaction histories in an intrusion detection system). The goal of our paper is to engineer the voting protocols to achieve good performance while meeting the reliability requirements of data delivery in a high assurance setting. The performance metrics are the data transfer efficiency (DTE) and the time-to-complete a data delivery (TTC). DTE captures the network bandwidth wasted and/or the energy drain in wireless-connected devices; whereas, TTC depicts the degradation in user-level QoS due to delayed and/or missed data deliveries. So, improving both DTE and TTC is a goal of our performance engineering exercise. Our protocol-level optimizations focus on reducing: i) the movement of user-level data between voters, ii) the number of voting actions/messages generated, and iii) the latency caused by the voting itself. The paper describes these optimizations, along with the experimental results from a prototype voting system.

关键词： Data engineering Voting Protocols Power engineering and energy Real time systems Embedded system Surveillance History Intrusion detection Reliability engineering

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3rd IEEE/Create-Net international conference on communication system software and middleware, COMSWARE

3rd IEEE/Create-Net International Conference on Communicatio...

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3rd IEEE/Create-Net international conference on communication system software and middleware, COMSWARE

ISBN: (纸本)9781424417971

The proceedings contain 114 papers. The topics discussed include: undersea wireless sensor network for ocean pollution prevention;an effective group-based key establishment scheme for large-scale wireless sensor networks using bivariate polynomials;performance evaluation of a new overloading scheme for cellular DS-CDMA with iterative multistage interference cancellation receiver;experiments with low power commodity hardware platforms for challenged networks;smart middleware for mutual service-network awareness in evolving 3GPP networks;power allocation schemes for cognitive radios;communication in personal healthcare;hierarchical modeling of the Axis2 Web services framework with FMC-QE;extracting dense communities from telecom call graphs;OFDM-MAC algorithms and their impact on TCP in next generation mobile networks;and a slotted ALOHA joint MAC-cum-routing protocol for data gathering sensor network applications.

关键词： Iterative methods

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Spectrum-sensing based interference mitigation for WLAN devices

Spectrum-sensing based interference mitigation for WLAN devi...

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3rd IEEE/Create-Net international conference on communication system software and middleware, COMSWARE

作者： Guoqing, Li Srikanteswara, Srikathyayani Maciocco, Christian Communication Technology Lab. Intel Corporation

ISBN: (纸本)9781424417971

The concept of spectrum sensing is, in the broad sense, the ability to detect and interpret other signals in the band and take appropriate actions by implementing adaptive techniques in the upper layers in addition to traditional interference cancellation techniques applied in the PHY layer. In this paper we present algorithms to trigger and detect interference from microwave oven for WLAN devices in the 2.4GHz spectrum and methods to mitigate the impact from the interference. The concept can be extended to other coexistence issues as well as spectrum sharing between primary and secondary users.

关键词： Wireless local area networks (WLAN)

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Instant collaboration - Developing a framework to support new patterns of team-cooperation

Instant collaboration - Developing a framework to support ne...

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3rd international conference on Web Information systems and Technologies

作者： Schatten, Alexander Poelz, David Epheser, Matthias Vienna Univ Technol Inst Software Technol & Interact Syst Flavoritenstr 9-11 Vienna Austria

ISBN: (纸本)9789728865795

communication and collaboration is supported by a multitude of different (client) applications and backend systems. At the same time, new patterns of collaboration between knowledge workers arise: people want to communicate in-time, share resources, keep track of their issues and yet do not want to be unnecessarily disturbed in their concentration. We analyse several systems and approaches to support team-collaboration and finally introduce our understanding of "instant collaboration". In our research we support first patterns with a middleware and client-side prototype. The system is built upon proven systems for (instant) messaging, communication and repositories, and suggest a system that allows support for new work-patterns, yet integrates seamlessly into existing IT and workgroup infrastructure and company policies.

关键词： instant collaboration instant messaging resource exchange team collaboration

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Exploring approaches to dynamic adaptation

Exploring approaches to dynamic adaptation

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3rd international DiscCoTec workshop on middleware-Application Interaction, MAI 2009

作者： Fox, Jorge Clarke, Siobhán Distributed Systems Group School of Computer Science and Statistics Trinity College Dublin Ireland

ISBN: (纸本)9781605584898

In this work, we compare current approaches to dynamic adaptation (DA) and identify the need for further research on mechanisms for DA, which should allow for higher compositionality and flexibility. Moreover, after exploring the research landscape in DA we identified the need for a framework that permits to compose several elements of a software system and specially the ones that perform adaptation. Finally, we identified the need for a framework that allows for runtime discovery or replacement of services with a runtime environment capable of verifying the reliability of changes and preservation of the execution time bounds of the software system. Copyright 2009 ACM.

关键词： software reliability

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An application program sharing model with fault-tolerance for multimedia distance education system based on RCSM

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3rd international conference on Intelligent Computing

作者： Kim, SoonGohn Ko, Eung Nam Joongbu Univ Div Comp & Game Sci 101 Daehakro Chungnam 312702 South Korea Baeksoek Univ Informat & Commun Div Cheonan 330704 Chungnam South Korea

ISBN: (纸本)9783540741701

A general web-based distance system uses video data and audio data to provide synchronize between teacher and student. This paper presents the design and implementation of an error and an application program sharing agent for collaborative multimedia distance education system which is running on RCSM (Reconfigurable Context Sensitive middleware) for ubiquitous networks. RCSM provides standardized communication protocols to interoperate an application with others under dynamically changing situations. it describes a hybrid software architecture that is running on situation-aware middleware for a web based distance education system which has an object with an various information for each session. There are two approaches to software architecture on which distributed, collaborative applications are based. Those include CACV (Centralized-Abstraction and Centralized-View) and RARV (Replicated-Abstraction and Replicated-View). And it also supports an application sharing model with fault tolerance for multimedia distance education system based RCSM.

关键词： Computer programming

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Analysis of communication traffic characteristics of two-hop-relay cellular system in the dead spots

Analysis of communication traffic characteristics of two-hop...

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8th ACIS international conference on software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing/3rd ACIS international workshop on Self-Assembling Wireless Networks

作者： Lu, Wei-feng Wu, Meng Nanjing Univ Posts & Telecommun Commun & Informat Engn Inst Nanjing 210003 Peoples R China

ISBN: (纸本)0769529097

In traditional cellular systems, the call requests initiated by mobile stations (MSs) must be carried through a base station (BS) via the cellular interface, but when MSs are located in the dead spots, their call requests mill be blocked because the MSs cannot communicate with the BS. It is considered to relay these blocked communication traffic by using ad hoc relaying, which will improve the performance of the system as a whole. This paper firstly introduces a novel architecture of two-hop-relay cellular system, and analyzes the communication traffic characteristics of the traditional cellular system and two-hop-relay cellular system respectively in the dead spots environment. Numerical results show that the two-hoprelay cellular system outpetforms the traditional cellular system in terms of the call blocking rate when considering the impact of dead spots.

关键词： Telecommunication traffic

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The SEMPA prototype - Using XAML and Web Services for Rich Interactive Peer-to-Peer Applications

The SEMPA prototype - Using XAML and Web Services for Rich I...

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3rd international conference on Collaborative Computing: Networking, Applications and Worksharing, CollaborateCom 2007

作者： Esch, Markus Schloss, Hermann Scholtes, Ingo Faculty of Sciences Technology and Communication University of Luxembourg 1359 Luxembourg Luxembourg System Software and Distributed Systems University of Trier D-54286 Trier Germany

ISBN: (纸本)1424413176

Currently one can see a surge of evolving technologies supporting the creation of Rich Internet Applications. All of these approaches however traditionally address the classic Client/Server scenario in which a dedicated Web Server acts as application provider for thin clients. This paper argues, that there are many scenarios in which a Peer-to-Peer approach enabling every application/process to export parts of its graphical user interface in a lightweight and interoperable way would be more desirable. This work-in-progress paper presents the lightweight middleware prototype SEMPA, proving that these scenarios can be supported by combining the readily available technologies extensible Application Markup Language (XAML) and Web Services.

关键词： Web services

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Message from the technical program committee chairs

3rd IEEE/Create-Net International Conference on Communicatio...

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3rd IEEE/Create-Net international conference on communication system software and middleware, COMSWARE 2007年 iii页

作者： Desai, Uday B. Mandyam, Giridhar Rastogi, Rajeev I.I.T Bombay India Qualcomm United States Bell Labs. India

No abstract available

ISBN: (纸本)9781424417971

No abstract available

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