检索结果-内蒙古大学图书馆

2001年

作者： Sonia Amin Fahmy Kihong Park

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Optimizing ip networks in a hybrid IGP/MPLS environment

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ANNALS OF TELECOMMUNICATIONS 2004年第11-12期59卷 1372-1387页

作者： Mulyana, E Killat, U Tech Univ Hamburg Dept Commun Networks BA IIA D-21071 Hamburg Germany

In this paper we consider a traffic engineering (TE) approach to ip networks in a hybrid IGP/MPLS environment. Though IGP (Interior Gateway Protocol) routing has proven its scalability and reliability, effective traffic engineering has been difficult to achieve in public ip networks because of the limited functional capabilities of conventional ip technologies. MPLS (Multi-Protocol Label Switching) on the one hand enhances the possibility to engineer traffic on ip networks by allowing explicit routes. But on the other hand it suffers from the scalability (N-square) problem. Hybrid IGP/MPLS approaches rely on ip native routing as much as possible and use MPLS only if necessary. In this work we propose a novel hybrid traffic engineering method based on genetic algorithms, which can be considered as an offline TE approach to handle long or medium-term traffic variations in the range days, weeks or months. In our approach the maximum number of hops an LSP (Label Switched Path) may take and the number of LSPS which are applied solely to improve the routing performance, are treated as constraints due to delay considerations and the complexity of management. We apply our method to the German scientific network (B-WIN) for which a traffic matrix is available and also to some other networks with a simple demand model. We will show results comparing this hybrid IGP/MPLS routing scenario with the result of pure IGP routing and that of a full mesh MPLS with and without traffic splitting.

关键词： teletraffic network routing ip telecommunication network traffic control genetic algorithm optimization

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A scalable framework for end-to-end QoS assurance in ip-oriented terrestrial-GEO satellite networks

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IEEE COMMUNICATIONS MAGAZINE 2005年第4期43卷 130-137页

作者： Molinaro, A De Rango, F Marano, S Tropea, M Univ Mediterranea Reggio Calabria Reggio Di Calabria Italy Univ Calabria I-87030 Commenda Di Rende Italy

The exponential growth of the Internet, the heterogeneity of networks, and the need for QoS maintenance have urged researchers to develop ideas for managing network scalability and end-to-end QoS assurance. In this article an ip IntServ architecture in the satellite access network is combined with a scalable ip DiffServ-like architecture in the terrestrial core network. The proposed architecture aims at guaranteeing fine-grained bandwidth control in the satellite access network and stateless scalability in the core network, by exploiting per-aggregate traffic flow control, typical of the Aggregate RSVP protocol, and stateless service assurance, typical of the SCORE approach.

关键词： Internet Quality of service Bandwidths Computer networks scalability (Systems engineering) Computer architecture Digital communications

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Performance evaluation of QoS-routing methods for ip-based multiservice networks

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COMPUTER COMMUNICATIONS 2003年第8期26卷 817-833页

作者： Ash, GR AT&T Labs Res Middletown NJ 07748 USA

This paper provides a performance analysis of lost/delayed traffic and control load for various quality of service (QoS)-routing methods, which control a network's response to traffic demands and other stimuli, such as traffic overloads, link failures, or node failures. Essentially all of the methods analyzed are already widely applied in operational networks worldwide, particularly in PSTN networks employing TDM-based technology. However, the methods are shown to be extensible to packet-based technologies, in particular, to Internet protocol (ip)based technologies. Results of performance analysis models are presented which illustrate the tradeoffs between various approaches. Based on the results of these studies as well as established practice and experience, methods for dynamic QoS routing and admission control are proposed for consideration in network evolution to ip-based technologies. In particular, we find that aggregated per-virtual-network bandwidth allocation compares favorably with per-flow allocation. We also find that event-dependent routing (EDR) methods for management of label switched paths perform just as well or better than the state-dependent routing methods with flooding, which means that EDR path selection has potential to significantly enhance network scalability. (C) 2002 Elsevier Science B.V. All rights reserved.

关键词： performance analysis traffic overload enhance network scalability QoS Routing

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A 0.5pJ/bit 7.2Gbps HBM3 PHY on Intel4 with EMIB Packaging and Unmatched Receiver Architecture on PHY Side with Per Bit Deskew Correction

A 0.5pJ/bit 7.2Gbps HBM3 PHY on Intel4 with EMIB Packaging a...

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International conference on VLSI Design

作者： Aakash Hasmukhray Mehta Javed S Gaggatur Mohammad M. Rashid Sampath Dakshinamurthy Aruna Kumar Lakya Srinivasamurthy Anil Kumar Goyal Subbarao Manam Harshit Gupta Sandeep Sukumar Vipin K Mishra Koushik N S Santosh Nekkanti Sambaran Mitra Pooja K Jadhav Miryala ChandraShekar Dudekula Humayun Michael C Rifani Jianyong Xie Andrew P Collins Intel Bengaluru Karnataka INDIA Intel Santa Clara California USA Intel Hillsboro Oregon USA Intel Chandler Arizona USA

ISBN: (数字)9798331522445

ISBN: (纸本)9798331522452

This paper introduces the third-generation High Bandwidth Memory (HBM3) HOST PHY, achieving a data rate of 7.2 Gbps per pin, designed on Intel 4 technology and utilizing embedded multi-die interconnect bridge (EMIB) based packaging. The design attains low energy efficiency (pJ/bit) through the use of unterminated N-N low swing transmitters and unmatched receive paths. To address N-UI supply-induced deterministic jitter, the entire clocking path is maintained under an internally generated linear voltage regulator (LVR). Advanced I/O training for PHY memory read/write operations is implemented using the proposed per bit deskew (PBD) for per pin eye optimization. Additionally, eye degradation due to temperature drift is mitigated in both write and read directions through a novel on-the-fly periodic sampling-point update mechanism, which operates without interrupting traffic.

关键词： Training Bridge circuits Receivers Packaging Silicon Energy efficiency Pins Delays ip networks Voltage control

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Securing Localization on the Internet of Drones: A Trust Based Intrusion Prevention System

Securing Localization on the Internet of Drones: A Trust Bas...

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IEEE conference on Wireless Communications and Networking

作者： Amine Hedfi Aida Ben Chehida Douss Ryma Abassi Mohamed Aymen Chalouf Omessad Hamdi Sup'Com LR-11/TIC-03 Innov'Com Research Laboratory University of Carthage Higher School of Communication Ariana Tunisia IRISA Laboratory University of Rennes Lannion France IMT Atlantique Cesson Sévigné France

ISBN: (数字)9798350368369

ISBN: (纸本)9798350368376

The Internet of Drones (IoD) has recently gained popularity in several areas, such as military operations, smart agriculture, traffic analysis and Search And Rescue (SAR). In a SAR mission, drones' localization is a key element of IoD. It is a fundamental process in Cyber-Physical Systems (CPS), where environmental and location data are intimately linked. However, the protection of the drone's localization from security attacks and threats like injection of false locations and data by malicious drones, remains a major concern. In this paper, we present a novel approach for securing drone's localization during SAR mission using Intrusion Prevention System (ipS). Our main objective is to detect any trajectory deviation using the anomaly behavior based on node's reputation and to isolate malicious drones when an alert is triggered. Our model consists of a Master Drone (MD), selected based on its high performance compared to other drones, and a Ground control Station (GCS) that configures the drones with the necessary parameters for the mission. The MD is synchronized with GCS to analyze the behavior of other drones using our ipS and a reputation value to determine if there is a significant deviation, indicating that the planned trajectory has been modified or altered. The proposed system model is based on ipS and trust management in order to detect the deviation of drones from their already configured trajectory planning. A case study of the proposed framework is provided in this paper.

关键词： Location awareness Trajectory planning Prevention and mitigation Trajectory Internet ip networks Security Synchronization Trust management Drones

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Towards scalable network emulation

Towards scalable network emulation

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conference on scalability and traffic control in ip networks

作者： Simmonds, R Unger, B Univ Calgary Dept Comp Sci Calgary AB T2N 1N4 Canada

ISBN: (纸本)081944250X

A network emulator enables real hosts to interact via a virtual network. It combines a real-time network simulator with a mechanism to capture packets from and write packets to a real network. Packets generated by external hosts interact with synthetic traffic within the virtual network, providing a controlled environment for testing real Internet applications. This paper focuses on two aspects related to the scalability of network emulators. The scalability of the virtual network run within the emulator and the scalability of the number of external hosts that can interact via the emulator, parallel discrete event simulation (PDES) techniques can be concurrently. For the scalability of the virtual network. employed. The scalability of the number of external hosts requires handling varying amounts of network I/O and mapping packets into the simulator efficiently. These issues are discussed in terms of work being done on the Internet Protocol traffic and Network Emulator (ip-TNE) developed at the University of Calgary.

关键词： Computer simulations Local area networks Internet Systems modeling Mathematical modeling Clocks Virtual reality Human-machine interfaces Telecommunications Operating systems

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Economics of scalable network services

Economics of scalable network services

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conference on scalability and traffic control in ip networks

作者： Chuang, J Univ Calif Berkeley Sch Informat Management & Syst Berkeley CA 94538 USA

ISBN: (纸本)081944250X

This paper explores the economics of scalable network services by posing two simple questions. First, what is the difference between scale economies and scalability? Second, why and how should we scale network services for competition and cooperation? By answering these questions in the context of network services such as multicast, QoS and web caching, we gain some insight into the tradeoffs involved in the design of scalable network services.

关键词： Internet Network architectures networks Distributed computing Forward error correction Computing systems control systems Data modeling Receivers Statistical multiplexing

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Delivering improved multiple services to ip traffic in DiffServ networks 28

Delivering improved multiple services to IP traffic in DiffS...

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28th Annual IEEE International conference on Local Computer networks held in conjunction with Workshop on High-Speed Local networks/Workshop on Wireless Local networks

作者： Bayle, T Aibara, R Nishimura, K Hiroshima Univ Grad Sch Engn Hiroshima 7398527 Japan

ISBN: (纸本)0769520375

This short paper presents the results of a research on the design, implementation and analysis of a packet scheduling mechanism for multi-traffic classes in the context of DiffServ networks. Our studies aimed at providing QoS assurances to real-time applications over ip networks. We began by identifying that QoS performance guarantees per-class of traffic aggregate are inherently required in the core of the Internet. We assume that traffic classification based on the application QoS requirements is an indispensable feature for providing QoS guarantees to a wide variety of real-time applications like voice over ip (Voip) and video conferencing due to the scalability issues.

关键词： Computational modeling Delay Diffserv networks Intelligent networks Internet telephony ip networks Quality of service Scheduling algorithm Telecommunication traffic traffic control

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ip switching - ATM under ip

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IEEE-ACM TRANSACTIONS ON NETWORKING 1998年第2期6卷 117-129页

作者： Newman, P Minshall, G Lyon, TL Ipsilon Networks Sunnyvale CA 94089 USA

Internet protocol (ip) traffic on the Internet and private enterprise networks has been growing exponentially for some time, This growth is beginning to stress the traditional processor-based design of current-day routers. Switching technology offers much higher aggregate bandwidth, but presently only offers a layer-2 bridging solution. Various proposals are under way to support ip routing over an asynchronous transfer mode (ATM) network, However, these proposals hide the real network topology from the ip layer by treating the data-link layer as a large opaque network cloud. We argue that this leads to complexity, inefficiency, and duplication of functionality in the resulting network. We propose an alternative in which we discard the end-to-end ATM connection and integrate fast ATM hardware directly with ip, preserving the connectionless nature of ip. We use soft-state in the ATM hardware to cache the ip forwarding decision. This enables further traffic on the same ip flow to be snitched by the ATM hardware rather than forwarded by ip software, We claim that this approach combines the simplicity, scalability, and robustness of ip with the speed, capacity, and multiservice traffic capabilities of ATM.

关键词： asynchronous transfer mode broadband communication communication system control data communication Internet protocol packet switching protocols

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