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6th IFIP/ACM Latin America Networking Conference, LANC 2011

作者： Rosa, Renata Lopes Rodríguez, Demóstenes Zegarra De Sousa Jr., Vicente Angelo Bressan, Graça Laboratory of Computer Networks and Architecture Escola Politécnica University of São Paulo Brazil Federal University of Natal Natal RGN Brazil

ISBN: (纸本)9781450308861

This paper introduces new network architecture capable of providing a flexible and configurable Recommendation System in which network operator, subscribers and content providers could interact to each other by message exchanging. This solution considers multiple inputs provided by the user and context-based information of IP Multimedia Subsystem (IMS) network. It creates a specific subscriber profile based on information from cellular and fixed networks, digital TV and, internet services as social networks or e-mail accounts. Also, for collecting information is used a Cell Broadcast platform which can send messages to a specific geographic location achieving users with high probability of similar preferences. User feedback is collected to evaluate the utility of recommendation messages. As additional features, the Recommendation System uses presence and location information as a decision factor to send or not the recommendation messages. © 2011 ACM.

关键词： Network architecture

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PCE algorithm for traffic grooming and QoS in multi-layer/multi-domain IP over WDM networks

PCE algorithm for traffic grooming and QoS in multi-layer/mu...

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2011 13th International Conference on Transparent Optical networks, ICTON 2011

作者： Sócrates Dantas, Joana Careglio, Davide Melo Silveira, Regina Ruggiero, Wilson Vicente Solé-Pareta, Josep University of Sã o Paulo LARC Computer Networks and Architecture Laboratory Brazil c/Jordi Girona 1-3 08034 Barcelona Spain

ISBN: (纸本)9781457708800

Differentiated services provision according to clients or applications is an added feature that network operators ambition to fully provide. One of the possible approaches is to map DiffServ into MPLS based network. However in an IP over WDM (Wavelength Division Multiplexing) network data flow traverse multiple layers and, therefore, Class-Type information from the MPLS DiffServ layer is eventually lost. Besides, with the implement of a Path Computation Element (PCE) on multi-layer and multi-domain networks, the bandwidth constraints used to differentiate services are no longer applied. This paper presents a proposal for a QoS DiffServ approach applied on PCE as a traffic grooming technique for WDM core networks and the problematic involved on the application of this technology on multilayer and multi-domain networks. © 2011 IEEE.

关键词： Quality of service

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Distributed Mass-Spring-Relaxation for Anchor-Free Self-Localization in Sensor and Actor networks

Distributed Mass-Spring-Relaxation for Anchor-Free Self-Loca...

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International Conference on computer Communications and networks (ICCCN)

作者： Juergen Eckert Felix Villanueva Reinhard German Falko Dressler Computer Networks and Communication Systems Department of Computer Science University of Erlangen Germany Computer Architecture and Networks School of Computer Science University of Castilla La Mancha Spain Institute of Computer Science University of Innsbruck Austria

We present a fully self-organizing approach for creating and maintaining a reference coordinate system for self-localization in Sensor and Actor networks (SANETs). GPS technology has become a de facto standard for outdoor localization, however, self-localization in GPS denied scenarios is still extremely challenging. Typically, anchor nodes or global state information are used to update the nodes' location information. In contrast, we present a fully self-organizing strategy to generate a distributed reference coordinate system. In particular, we use autonomous robot systems to span and maintain this coordinate system. In particular, we investigated the capabilities of the Mass-Spring-Relaxation (MSR) algorithm, which is frequently used for fault-tolerant and robust localization. Unfortunately, this algorithm needs certain globally valid state information. We extended the MSR algorithm in two ways: First, we made the algorithm independent of a priori global knowledge, and, secondly, we provide extensions that make the algorithm more reliable and robust, and to reduce the number of necessary information exchanges between the nodes. As can be seen from the simulation results, our advanced MSR is very accurate and clearly outperforms the classical MSR for increasing network sizes. We also validated the simulations in an experimental setting. The obtained results confirm the very high localization accuracy.

关键词： Springs Equations Distance measurement Artificial neural networks Hardware Robot sensing systems Accuracy

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PCE algorithm for traffic grooming and QoS in multi-layer/multi-domain IP over WDM networks

PCE algorithm for traffic grooming and QoS in multi-layer/mu...

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International Conference on Transparent Optical networks

作者： Joana Sócrates Dantas Davide Careglio Regina Melo Silveira Wilson Vicente Ruggiero Josep Solé-Pareta Technical University of Catalonia Barcelona Spain LARC-Computer Networks and Architecture Laboratory University of São Paulo Brazil

关键词： Bandwidth Quality of service IP networks WDM networks Multiprotocol label switching Diffserv networks Computational modeling

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On the nonlinearity of some T-functions

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Journal of Information and Computational Science 2011年第11期8卷 2231-2237页

作者： Wang, Yan Hu, Yupu Li, Shunbo Key Laboratory of Computer Networks and Information Security Ministry of Education Xidian University Xi'an 710071 China Department of Mathematics Xi'an University of Architecture and Technology Xi'an 710055 China

Single cycle T-functions are newly proposed components in stream cipher. In order to verify if such function is suitable for cipher design, the cryptographic properties of single cycle T-function are discussed. Nonlinearity of the kth coordinate function of single cycle T-functions are studied according to the properties of single cycle T-function and the Walsh transform. Lower bounds and upper bounds are given at different situations. The results show that a single cycle T-function itself have 0 nonlinearity, but the most significant coordinate function can get high nonlinearity. © 2011 Binary Information Press.

关键词： Walsh transforms

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A taxonomy model for cloud computing services

A taxonomy model for cloud computing services

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作者： Gonzalez, Nelson M. Miers, Charles C. Redígolo, Fernando F. Simplício, Marcos Carvalho, Tereza C. M.B. Näslund, Mats Pourzandi, Makan Laboratory of Computer Architecture and Networks University of São Paulo Av. Prof. Luciano Gualberto Trav. 3 - Nr. 158 - C1 50a São Paulo Brazil Ericsson Research Stockholm Sweden Ericsson Research Ville Mont-Royal Canada

ISBN: (纸本)9789898425522

The continuous development of cloud computing is in evidence in several academic and non-academic researches. However, the relative youth of this field has produced several distinct definitions and taxonomies regarding the concept of cloud computing, as well as the classification and organization of such services. The appearance of commercial cloud solutions in this context with no firmly established standards only complicates the matter, making it difficult to determine how solutions should be technically identified and qualified. Therefore, with the growing complexity of the area, identifying, clarifying and classifying cloud services are essential steps to understand their organization, purpose and interaction with other services. With this goal in mind, this article presents a study on existing concepts and taxonomies, and then harmonizes these approaches in an extensible taxonomy model for cloud computing services. More specifically, this proposal builds on the SPI (Software, Platform, and Infrastructure) taxonomy created by NIST (National Institute of Standards and Technology), creating a hierarchical organization that groups different services according to their characteristics;the result is a taxonomy model that allows finer-grained analyses to be performed, while essentially keeping the simplicity of SPI itself. Finally, we present a specific instance of this model focused on existing and representative cloud services.

关键词： Taxonomies

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A description language for user interface services

A description language for user interface services

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IADIS International Conference WWW/Internet 2010

作者： Hübsch, Gerald Liebing, Christian Spillner, Josef Schill, Alexander Technische Universität Dresden Institute for Systems Architecture Department of Computer Networks Germany

ISBN: (纸本)9789728939250

In this paper, we present the User Interface Service Description Language (UISDL) for the description of UI Services. UI Services allow UI component implementations to be globally distributed, flexibly integrated and dynamically bound into interactive applications including, but not limited to, Rich Internet Applications. We present abstraction concepts, motivate design decisions, and discuss analogies between UISDL and WSDL as a classical service description language. © 2010 IADIS.

关键词： User interfaces

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Determining relevant product information sources

Determining relevant product information sources

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2010 3rd IEEE/WIC/ACM International Conference on Web Intelligence and Intelligent Agent Technology - Workshops, WI-IAT 2010

作者： Wauer, Matthias Department for Computer Networks Institute for Systems Architecture Technische Universität Dresden Germany

ISBN: (纸本)9780769541914

This position paper describes the challenges related to federated enterprise search over heterogeneous product information sources. It focuses on the aspect of finding relevant information sources w.r.t. the user's information need and identifies core research questions with regards to the design and implementation of a potential solution, based on Semantic Web techniques. © 2010 IEEE.

关键词： Search engines

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Metadata in digital video repositories: An analysis on author-generated metadata

Metadata in digital video repositories: An analysis on autho...

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2010 International Conference on Information Society, i-Society 2010

作者： Dantas, Joana Socrates Silveira, Regina Melo Ruggiero, Wilson Vicente LARC-Laboratory of Computer Architecture and Networks Department of Computer and Digital System Engineering Escola Politécnica da Universidade São Paulo Brazil

ISBN: (纸本)9780956426338

The growth of digital content generation and its access by the general public have, for the past few years, promoted the importance of resources' metadata, and enhanced the debate on their generation and quality. The improvement of new technologies and users needs have led to new metadata generation practices, which include the author-generated metadata. By studying the current literature on the subject we analyzed the author-generated metadata quality used on a given IPTV service. From the results of this study we propose an alternative methodology for insertion of metadata by the service user, where an auto-complete engine is applied aiming to enhance the system's metadata quality. © 2010 i-Society.

关键词： Metadata

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A novel ISAR alogrithm for the imaging of ship targets based on AM-LFM model

A novel ISAR alogrithm for the imaging of ship targets based...

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International Conference on Signal Processing Proceedings (ICSP)

作者： Zhang, Long Si, Dong Sen College of Electronics and Information Xi'an Polytechnic University Xi'an China Institute of Computer Architecture and Networks Xi'an Jiaotong University Xi'an China

ISBN: (纸本)9781424458981

Rang-Instaneous-Doppler (RID) processing is widely used in ISAR imaging of maneuvering target and acceptable image can be achieved when the amplitude modulation effect of scatterers echoes can be neglected during intergation time, whereas, the RID method based on the assumption above does not work properly when the variant amplitude modulation of scatterers' echoes involved, such as ship target. In this paper, a multicomponent amplitude modulation and linear frequency modulation(AM-LFM) signal model developed and a fast parameter estimation technique-DechirpClean method *** achieve the best quality in DechirpClean ISAR image, a new effective optimum imaging interval selection scheme addressed. The performance of proposed method is verified by comparing the result with the image produced by conventional RID method from the real data processing. © 2010 IEEE.

关键词： Amplitude modulation

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