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检索条件"任意字段=Conference on All-Optical Communication Systems: Architecture, Control and Network Issues"

共 2536 条记录，以下是1621-1630 订阅

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optical grid infrastructure: Establishing multiple end-to-end lightpaths in optical networks

Optical grid infrastructure: Establishing multiple end-to-en...

引用

4th International conference on Broadband communications networks and systems

作者： Harai, Hiroaki Xu, Sugang Sekido, Mamoru Natl Inst Informat & Commun Technol Koganei Tokyo 1848795 Japan

ISBN: (纸本)9781424414321

We introduce our optical grid infrastructure where end-to-end, bandwidth-guaranteed lightpaths are established simultaneously. This is developed on a light-path network that employs wavelength-routing. One application may send a request for multiple lightpaths to the network, which establishes the lightpaths one-by-one. Thus, several lightpaths may be rejected due to simultaneous reservation of an identical wavelength or undesired wavelength use. The proposed control-layered structure consisting of application, optical-grid control, and optical-network control layers bridges the gap between applications and optical networks. The optical-grid control layer translates an application request to form a set of lightpaths into multiple requests for the network. This layer is also capable of adjusting the available network interfaces of the hosts and the available wavelengths of the network such that all the lightpaths are likely to be established. We address our testbed network in the Tokyo metropolitan area and a collaborative work with e-VLBI (Very Long Baseline Interferometry), which requires long-distance, high-speed, and non-data loss communication circuits in the network.

关键词： network layers

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A multi-agent flexible architecture for autonomic services and network management

A multi-agent flexible architecture for autonomic services a...

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5th IEEE/ACS International conference on Computer systems and Applications (AICCSA-07)

作者： Al-Obaisat, Yazeed Braun, Robin Univ Technol Sydney Fac Engn Inst Informat & Commun Technol Sydney NSW 2007 Australia

ISBN: (纸本)9781424410309

Modern data and communication networks have been growing dramatically in diversity, heterogeneity and complexity. Hence the management of such dynamic networks is an extremely difficult task due to some key issues such as;the increasing network size and functionality, rapidly and continuously changing network topology and complexity. This paper introduces a management paradigm to give rise to the autonomic management solutions (Le., activation, monitoring, control, and administration) of management functionalities. It also introduces an architecture that (1) places lite various management functions (FCAPS) into a design structure that can be used to select those functions that may give way to autonomic management and (2) to design the algorithms that may fulfill the management function. This architecture consists of four horizontal logical layers (Products, Components, Services, and Resources Layers) and two vertical logical layers (Management layer and information layer). Autonomous management agents (Swarm agents in this context) sit in the management layer and can sense changes/events in the four horizontal layers and react autonomically to reconfigure and adapt themselves based on the information scattered and gathered over the network.

关键词： Multi agent systems

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Cost-effective wavelength-shared hybrid passive optical network upgrade re-using both optical network units and remote node 33

Cost-effective wavelength-shared hybrid passive optical netw...

引用

2007 33rd European conference and Exhibition of optical communication, ECOC 2007

作者： Bouda, Martin Palacharla, Paparao Akasaka, Youichi Smith, Stephen Naito, Takao Fujitsu Laboratories of America Inc. 2801 Telecom Parkway RichardsonTX75082 United States Fujitsu Network Communications Inc. 2801 Telecom Parkway RichardsonTX75082 United States

We have proposed and demonstrated the cost-effectiveness of a Wavelength-Shared Hybrid PON architecture for upgrades of existing PON systems while re-using all equipment on customer premises and reusing the fiber plan... 详细信息

ISBN: (纸本)9783800730421

关键词： Passive optical networks

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Study of an optical multi-wavelength slotted ring protocol with tunable transceivers

Study of an optical multi-wavelength slotted ring protocol w...

引用

6th IASTED International conference on communication systems and networks

作者： Baziana, P. A. Pountourakis, I. E. Natl Tech Univ Athens Sch Elect & Comp Engn GR-15773 Athens Greece

ISBN: (纸本)9780889866959

This paper proposes a slotted access protocol for WDM ring network architecture suitable for Metropolitan Area networks. Each node uses a pair of tunable transmitter and tunable receiver to communicate exploiting all the fiber data wavelengths. Also, each node uses a pair of fixed tuned transmitter and fixed tuned receiver to exchange control information over a separate control wavelength. The proposed protocol efficiently faces the serious scalability problems that many WDMA ring protocols introduce, due to the use of a dedicated data wavelength per node for either transmission or reception. Performance evaluation is provided through theoretical analysis and through a discrete event simulation model using both Poisson and self-similar traffic sources, giving more realistic performance evaluation. Simulation results show that the proposed WDMA protocol manages efficient network utilization providing excellent fairness among the nodes. Comparative simulation results prove that the proposed access scheme achieves significant performance improvement compared with the study of [5] which employs nodes with one fixed tuned transmitter.

关键词： wavelength division multiplexing (WDM) Metropolitan Area network (MAN) WDM ring dropping probability

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Beyond sensor networks: ZUMA middleware

Beyond sensor networks: ZUMA middleware

引用

IEEE Wireless communications and networking conference

作者： Soini, Mikael N. K. Van Greunen, Jana Rabaey, Jan M. Sydanheimo, Lauri T. Tampere Univ Technol Inst Elect Rauma Res Unit Rauma Finland Univ Calif Berkeley Berkeley Wireless Res Ctr Berkeley CA 94720 USA

ISBN: (纸本)9781424406586

Most wireless sensor network (WSN) proposals are unrelated to multimedia and other smart home infrastructures. This paper combines these issues and presents a solution where the Kilavi sensor network platform can be used as middleware to provide information for ZUMA. Kilavi is a centralized protocol designed for communication between high capacity management point and low capacity sensor nodes in building environment. ZUMA is a centralized future smart-home platform that interconnects all kinds devices in the home environment. This paper mainly focuses on sensor network operation issues. The discussion is on the benefits that the centralized architecture can provide in typical sensor network operations that are node discovery, routing and data dissemination, power control, and security. To support the discussion, the paper gives numbers that illustrate the benefits that centralization has over typical decentralized WSN solutions in home environment.

关键词： middleware smart home network performance and evaluation wireless sensor networks

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WiFiDump - A novel architecture for wireless network debugging

WiFiDump - A novel architecture for wireless network debuggi...

引用

2nd International conference on communication systems Software and Middleware

作者： Bagri, Abhijit Mundhra, Mohit Pathak, Abhinav Raman, Bhaskaran Indian Inst Technol Dept Comp Sci & Engn Kanpur 208016 Uttar Pradesh India Purdue Univ W Lafayette IN 47907 USA

ISBN: (纸本)9781424406135

802.11 usage has exploded and broken all barriers for which it was originally proposed. This has resulted in research for its non-legacy usages. Such usages require study of packets with low level details such as signal strength, rate and frame control parameters. We provide a novel architecture called WiFiDump which can provide such low level details from network driver to a user space process. We also provide an implementation and evaluation of the proposed architecture for 802.11b networks on systems running prism2 chipset based cards. Further, the entire package has been incorporated on Linux with the popular packet capturing and filtering library libpcap and the standard tool - tcpdump.

关键词： tcpdump libpcap hostap WiFiDump ioctl filtering

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Experience of developing and implementing School Notification System in Croatia

Experience of developing and implementing School Notificatio...

引用

4th International conference on Cybernetics and Information Technologies, systems and Applications/5th Int Conf on Computing, communications and control Technologies

作者： Labor, Ozren Micin, Matija Nizic, Jure KATE KOM Doo Res & Dev Unit Zagreb 10000 Croatia

ISBN: (纸本)9781934272077

Today there are many information services present that are using technology of notification and information management. Information and communication Technology could improve process of education by addressing key problems at a reasonable cost. As a result of such an effort SMS School Notification Service (SMS-SNS) has been developed, addressing problems of school information exchange between students, parents and teachers. Mentioned information exchange can be maintained by mobile network and Internet. This article presents the experience of development of SMS-SNS from the idea itself, through the architecture, and finally its implementation within telecommunication network. Given implementation experience covers period from the moment of application sale till it's conversion into service. Major problems and pitfalls are explained faced by the potential service provider, as well as instructions for avoiding them in order to transform application into profitable service. Once in operation, SMS-SNS system technologically enables a social network, which enhances social processes in schools and provides additional communication stimulus within the social network of teachers, parents and students. The proposed system directly improves communication between teachers and parents and indirectly the communication regarding school events within a family. all this finally results with numerous benefits to all participants of this communication model and improves education system itself, which is validated through the given daily usage experience.

关键词： notification service SMS information exchange telecommunication network value added service service architecture service implementation

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Agent based bandwidth reduction for key management in hierarchical group communication

Agent based bandwidth reduction for key management in hierar...

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2nd International conference on communication systems Software and Middleware

作者： Moulavi, M. Amir Parvar, H. Islamic Azad Univ Mashhad Dept Comp Engn Tehran Iran Islamic Azad Univ Mashhad Dept Comp Engn Tehran Iran

ISBN: (纸本)9781424406135

One of the most important issues in secrecy of group communication is confidentiality. In order to satisfying confidentiality, symmetric cryptography must be exploited. all symmetric algorithms require a common key between the members. High frequency in the number of joining members can cause massive flow of data between authorized group members. Although hierarchical group communication is a prominent model, it has not been investigated in security literature as well as other models. There has been an extensive research on satisfying confidentiality in group communications on different architecture other than the hierarchical architecture and the proposed hierarchical models do not use the concept of agents. In this paper, we investigate a new approach to secure key management in hierarchical group communication by means of bandwidth reduction. This can be accomplished by using agents. The simulation results show that using agents reduce network bandwidth and improve and achieve more performance comparing with other models.

关键词： Bandwidth

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The architecture of aircraft instrumentation networks

The architecture of aircraft instrumentation networks

引用

43nd Annual International Telemetering conference and Technical Exhibition - Answering Tomorrow's Telemetry Challenges, ITC/USA 2007

作者： Roach, John VP Network Products Division Teletronics Technology Corporation Newtown PA United States

The development of network-based data acquisition systems has resulted in a new architecture for supporting flight instrumentation that has the potential to revolutionize the way we test our aircraft. Unlike conventional flight test instrumentation, networks provide for a two-way communication path between all elements of the system, utilize packetized data, support communication protocols, have dynamic quality of service levels, can be subject to loss of data, utilize asynchronous transmission behavior and provide an even higher level of time synchronization. Different flight test architectures can be realized which combine each of the previous attributes in different ways;finding the best architecture for a set of given applications while minimizing cost and complexity is a very difficult problem. For the last 3 years, the network Products Division at Teletronics has been involved in the design and evaluation of aircraft instrumentation networks for both customers and the iNET program. This paper describes the result of these efforts by discussing the high-level design of a modular architecture for an aircraft instrumentation network. © International Foundation for Telemetering, 2007.

关键词： Data acquisition

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A new CAC protocol for optimizing revenue and ensuring QoS

A new CAC protocol for optimizing revenue and ensuring QoS

引用

10th International conference on Computer and Information Technology

作者： Chowdhary, Tania Taharima Alam, Md. Shafiul Soel, Md. Mohiuddin Kabir, Raiyan Ahmmed, Suman United Int Univ Dept Comp Sci & Engn Dhaka Bangladesh

ISBN: (纸本)9781424415502

Call Admission control (CAC) protocol will try to be fair, fast, reducing inconveniences, and maintaining Quality of Service (QoS) at the time of deciding whether a call request will be accepted or rejected into a network or communication system. A good CAC should have the ability to select the calls among the requested calls in such a way so that maximum fairness is justified by its performances at the sometime it should achieve some targets such as maximizing the revenue considering the constraints of the network system such as limited bandwidth. In the today's communication world the demand of bandwidth increases sharply due to the different users different types of service requirements such as audio, video, voice etc. from the same communication system. Besides need to deal with different tariff. So considering all these issues a CAC needs to decide which call requests should be admitted or not, which is obviously a critical and difficult task. In this paper a new CAC protocol is proposed that can select the best calls for the communication system, it can optimize the generated revenue from the network system, it can handle the different call admission situations in a fairness way, it can consider the different priorities based on class, can maximize the revenue of the communication system and also maintains the overall QoS for any network or communication system. Empirical results have shown its excellent performances for any network and communication platform.

关键词： Call Admission control QoS bandwidth channel utilization optical network revenue

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