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4th International Conference on Complex, Intelligent and Software Intensive Systems (CICIS)

作者： Biernacki, Arkadiusz Silesian Tech Univ Inst Comp Sci Gliwice Poland

ISBN: (纸本)9780769539676

Over the last years many technological advances were introduced in Internet television to meet user needs and expectations. However due to an overwhelming bandwidth requirements traditional IP-based television service based on simple client-server approach remains restricted to small group of clients. In such situation the use of the peer-to-peer overlay paradigm to deliver live television on the Internet is gaining increasing attention. Unfortunately the current Internet infrastructure provides only best effort services for this kind of applications and do not offer quality of service. This paper is a research proposition which presents potential solutions for efficient IPTV streaming over P2P networks. We assume that the solutions will not directly modify existing P2P IPTV protocols but rather will be dedicated for a network engineer or an Internet service provider which will be able to introduce and configure the proposed mechanisms in network routers.

关键词： network architecture and design Distributed applications Wide-area networks Emerging technologies

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Sharing RFID and complex event data among organizations

Sharing RFID and complex event data among organizations

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2nd International Workshop on RFID Technology-Concepts, Applications, Challenges (IWRT)

作者： Ziekow, Holger Guenther, Oliver Humboldt Univ Inst Informat Syst D-10178 Berlin Germany

Integrating RFID data from various sources in a value chain is an important requirement for leveraging the full potential of the technology. To facilitate this crucial integration, the global standardization organization GS1 is currently developing a range of service specifications. Yet, the services specified so far do not enable event-based interaction schemes and do not leverage the detection of distributed complex events. In this paper we propose to fill this gap by means of a peer-to-peer based broker network that can realize event-based interaction on top of existing specifications. For this infrastructure we present a new method to improve in-network processing. As shown by our experiments, our method significantly reduces overall system load by exploiting a priori knowledge about the observed processes.

关键词： network architecture and design Administrative data processing Data sharing

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An Efficient Directed Localization Recursion Protocol for Wireless Sensor networks

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IEEE TRANSACTIONS ON COMPUTERS 2009年第5期58卷 677-691页

作者： Braga Fernandes de Oliveira, Horacio Antonio Boukerche, Azzedine Nakamura, Eduardo Freire Ferreira Loureiro, Antonio Alfredo Univ Ottawa Sch Informat Technol & Engn PARADISE Res Lab Ottawa ON K1N 6N5 Canada Univ Fed Minas Gerais Dept Comp Sci BR-30123970 Belo Horizonte MG Brazil Univ Fed Amazonas Dept Comp Sci BR-69077000 Manaus Amazonas Brazil FUCAPI Ctr Anal Res & Technol Innovat Fdn BR-69075351 Manaus Amazonas Brazil

The establishment of a localization system is an important task in wireless sensor networks. Due to the geographical correlation between sensed data, location information is commonly used to name the gathered data and address nodes and regions in data dissemination protocols. In general, to estimate its location, a node needs the position information of at least three reference points (neighbors that know their positions). In this work, we propose a different scheme in which only two reference points are required in order to estimate a position. To choose between the two possible solutions of an estimate, we use the known direction of the recursion. This approach leads to a recursive localization system that works with low-density networks (increasing by 40 percent the number of nodes with estimates in some cases), reduces the position error by almost 30 percent, requires 37 percent less processor resources to estimate a position, uses fewer beacon nodes, and also indicates the node position error based on its distance to the recursion origin. No GPS-enabled node is required, since the recursion origin can be used as a relative coordinate system. The algorithm's evaluation is performed by comparing it with a similar localization system;also, experiments are made to evaluate the impact of both systems in geographic algorithms.

关键词： network architecture and design algorithm/protocol design and analysis wireless sensor networks localization GPS free

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PReSENt: A Collaboration Framework for Resource Sharing in Wireless Mesh networks

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IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS 2009年第3期20卷 289-302页

作者： Kim, Hwangnam Kim, E-yong Korea Univ Sch Elect Engn Seoul 136713 South Korea Samsung Elect Suwon 443742 Gyeonggi Do South Korea

Many protocol particulars developed for the wireless mesh networks such as multipath routing, channel assignment, topology control, assume that a network-wide collaboration is available to establish connections to the network outside. However, the collaboration can be easily discouraged in the presence of selfish behaviors, referred to as free riding. In this paper, we propose a framework, PReSENt, to promote and make more secure the practices of collaboration among nodes by securing a compensation to the collaboration. When the PReSENt is enabled in wireless mesh networks, a node accumulates credits, an amount quantifying its resource provision when it provides its resource for other nodes. The nodes consuming the resource publish rewards, an amount quantifying their resource usage. The credits are used to guarantee the resource sharing for the provider from the customers in the future, whose amount is proportional to its relative contribution to the network-wide collaboration. The rewards are used to validate their corresponding credits in order to prevent false accumulations of the credits in selfish nodes. We formally define the underlying security model of the PReSENt and prove that the PReSENt is secure in the random oracle model. We then implement the PReSENt in J-Sim to illustrate its operational behaviors with respect to correct and secure resource sharing. The simulation results indicate that the PReSENt correctly encourages and controls the collaboration on resource sharing in wireless mesh networks.

关键词： network architecture and design wireless communication wireless mesh networks

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Performance Comparison of Content-oriented networking Alternatives: A Tree versus A Distributed Hash Table

Performance Comparison of Content-oriented Networking Altern...

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IEEE 34th Conference on Local Computer networks

作者： Choi, Jaeyoung Han, Jinyoung Cho, Eunsang Kim, Hyunchul Kwon, Taekyoung Choi, Yanghee Seoul Natl Univ Sch Comp Sci & Engn Seoul South Korea

ISBN: (纸本)9781424444885

While the Internet was designed with host-oriented networking applications, recent Internet statistics show that content-oriented traffic has become more and more dominant. Even though content-oriented networking, which tries to resolve this discordance, has received increasing attention, there have been few comprehensive and quantitative studies on how to realize a content-oriented networking architecture. In this paper, we focus on the design alternatives of the content-oriented networking architecture and evaluate their performance: (i) how to locate contents, (ii) how to cache contents, and (iii) how to deliver contents. There are two major infrastructure alternatives in substantiating these mechanisms: a tree and a distributed hash table (DHT). We carry out comprehensive simulation experiments to compare these alternatives in terms of content transfer latency, cache effectiveness, and failure resilience.

关键词： network architecture and design Name Resolution Route-by-name Paradigm Contents Caching Performance Evaluation

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The RNA Metaprotocol

The RNA Metaprotocol

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17th International Conference on Computer Communications and networks

作者： Touch, Joseph D. Pingali, Venkata K. USC Inst Informat Sci Marina Del Rey CA 90292 USA

ISBN: (纸本)9781424423897

The Recursive network architecture (RNA) explores the relationship of layering to protocol and network architecture. RNA examines the implications of using a single, tunable protocol, called a metaprotocol, for different layers of the protocol stack, reusing basic protocol operations across different protocol layers to avoid reimplementation. Its primary goal is to encourage cleaner cross-layer interaction, to support dynamic service composition, and to gain an understanding of how layering affects architecture. This paper provides a description of RNA and a recently completed initial prototype. The prototype extends the Click modular router with control capabilities including dynamic composition and discovery. These capabilities are used to demonstrate simple but flexible stacks of instances of a metaprotocol that are customizable at runtime.

关键词： Algorithm/protocol design and analysis Internet network architecture and design Protocols

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A scalable overlay multicast architecture for large-scale applications

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IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS 2007年第4期18卷 449-459页

作者： Lao, Li Cui, Jun-Hong Gerla, Mario Chen, Shigang Google Inc Santa Monica CA 90401 USA Univ Connecticut Dept Comp Sci & Engn Unit 2155 Storrs CT 06269 USA Univ Calif Los Angeles Dept Comp Sci Los Angeles CA 90095 USA Univ Florida Dept Comp & Informat Sci & Engn Gainesville FL 32611 USA

In this paper, we propose a Two-tier Overlay Multicast architecture (TOMA) to provide scalable and efficient multicast support for various group communication applications. In TOMA, Multicast Service Overlay network (MSON) is advocated as the backbone service domain, while end users in access domains form a number of small clusters, in which an application-layer multicast protocol is used for the communication between the clustered end users. TOMA is able to provide efficient resource utilization with less control overhead, especially for large-scale applications. It also alleviates the state scalability problem and simplifies multicast tree construction and maintenance when there are large numbers of groups in the network. To help MSON providers efficiently plan backbone service overlay, we suggest several provisioning algorithms to locate proxies, select overlay links, and allocate link bandwidth. Extensive simulation studies demonstrate the promising performance of TOMA.

关键词： network architecture and design multicast network management

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A network architecture supporting consistent rich behavior in collaborative interactive applications

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IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS 2006年第3期12卷 405-416页

作者： Marsh, J Glencross, M Pettifer, S Hubbold, R Univ Manchester Sch Comp Sci Manchester M13 9PL Lancs England

network architectures for collaborative virtual reality have traditionally been dominated by client-server and peer-to-peer approaches, with peer-to-peer strategies typically being favored where minimizing latency is a priority, and client-server where consistency is key. With increasingly sophisticated behavior models and the demand for better support for haptics, we argue that neither approach provides sufficient support for these scenarios and, thus, a hybrid architecture is required. We discuss the relative performance of different distribution strategies in the face of real network conditions and illustrate the problems they face. Finally, we present an architecture that successfully meets many of these challenges and demonstrate its use in a distributed virtual prototyping application which supports simultaneous collaboration for assembly, maintenance, and training applications utilizing haptics.

关键词： virtual reality network architecture and design haptic I/O computer supported collaborative work computer-supported cooperative work simulation modeling and visualization client/server distributed applications computer aided design

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Bandwidth aggregation for real-time applications in heterogeneous wireless networks

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IEEE TRANSACTIONS ON MOBILE COMPUTING 2006年第4期5卷 388-403页

作者： Chebrolu, K Rao, RR Univ Calif San Diego Dept Elect & Comp Engn La Jolla CA 92093 USA

A variety of wireless interfaces are available for today's mobile user to access Internet content. When coverage areas of these different technologies overlap, a terminal equipped with multiple interfaces can use them simultaneously to improve the performance of its applications. In this paper, we motivate the advantages that can be had through simultaneous use of multiple interfaces and present a network layer architecture that enables diverse multiaccess services. In particular, we explore in depth one such service provided by the architecture: Bandwidth Aggregation (BAG) for real-time applications. An important aspect of the architecture when providing BAG services for real-time applications is the scheduling algorithm that partitions the traffic onto different interfaces such that the QoS requirements of the application are met. We propose one such algorithm Earliest Delivery Path First (EDPF), that ensures packets meet their playback deadlines by scheduling packets based on the estimated delivery time of the packets. We show through analysis that EDPF performs close to an idealized Aggregated Single Link (ASL) discipline, where the multiple interfaces are replaced by a single interface with same aggregated bandwidth. A prototype implementation and extensive simulations carried using video and delay traces show the performance improvement BAG with EDPF scheduling offers over using just the Highest Bandwidth Interface (HBI) and other scheduling approaches based on weighted round robin.

关键词： network architecture and design video scheduling algorithm/protocol design and analysis implementation simulation

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A joint-ONU interval-based dynamic scheduling algorithm for ethernet passive optical networks

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IEEE-ACM TRANSACTIONS ON networkING 2006年第4期14卷 889-899页

作者： Naser, Hassan Mouftah, Hussein T. Lakehead Univ Dept Software Engn Thunder Bay ON P7B 5E1 Canada Univ Ottawa Sch Informat Technol & Engn Ottawa ON K1N 6N5 Canada

This paper proposes a new dynamic bandwidth allocation system for Ethernet Passive Optical networks (EPONs), subject to requirements of fairness, efficiency, and cost. An Optical Line Terminal (OLT)-centric bandwidth allocation model is proposed which employs a credit pooling,technique combined with a weighted-share policy to partition the upstream bandwidth among different classes of service, and to prevent Optical network Units (ONUs) from monopolizing the bandwidth. The OLT-centric model allows global optimization of network resources, a characteristic which is not found in many earlier proposals. Supported by the new bandwidth allocation, the paper proposes a joint-ONU interval-based packet scheduling algorithm, referred to herein as COPS (Class -of-service Oriented Packet Scheduling), that meets the requirements set out above. We compare COPS with another well-known scheduling algorithm which employed a standard priority-based bandwidth sharing. We show that COPS is superior in terms of network utilization and maximum packet delay, with the consequence of an increase in average packet delay for the premium traffic. This drawback is overcome by combining COPS with a rate-based optimization scheme.

关键词： communication protocols network architecture and design network technologies

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