Journal ArticleDOI
Dimensioning bandwidth for elastic traffic in high-speed data networks
Arthur W. Berger,Yaakov Kogan +1 more
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The model is compared with simulations, the accuracy of the asymptotic approximations are examined, the increase in bandwidth needed to satisfy the tail-probability performance objective as compared with the mean objective, and regimes where statistical gain can and cannot be realized are shown.Abstract:
Simple and robust engineering rules for dimensioning bandwidth for elastic data traffic are derived for a single bottleneck link via normal approximations for a closed-queueing network (CQN) model in heavy traffic. Elastic data applications adapt to available bandwidth via a feedback control such as the transmission control protocol (TCP) or the available bit rate transfer capability in asynchronous transfer mode. The dimensioning rules satisfy a performance objective based on the mean or tail probability of the per-flow bandwidth. For the mean objective, we obtain a simple expression for the effective bandwidth of an elastic source. We provide a new derivation of the normal approximation in CQNs using more accurate asymptotic expansions and give an explicit estimate of the error in the normal approximation. A CQN model was chosen to obtain the desirable property that the results depend on the distribution of the file sizes only via the mean, and not the heavy-tail characteristics. We view the exogenous "load" in terms of the file sizes and consider the resulting flow of packets as dependent on the presence of other flows and the closed-loop controls. We compare the model with simulations, examine the accuracy of the asymptotic approximations, quantify the increase in bandwidth needed to satisfy the tail-probability performance objective as compared with the mean objective, and show regimes where statistical gain can and cannot be realized.read more
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Book ChapterDOI
Telecommunications Network Design
Anders Forsgren,Mikael Prytz +1 more
TL;DR: This chapter considers an overview of the issues that arise as well as a number of specific optimization models and problems in telecommunications networks, which may be formulated as mixed-integer linear programs.
Journal Article
A Fair QoS Scheme for Bandwidth Allocation by Precomputation-based Approach
王嘉宏,Chia-Hung Wang,陸行,Hsing Luh +3 more
TL;DR: A bandwidth allocation model with Pareto optimal allocations of bandwidth on All-IP networks under a preset budget is formulated, and numerical results are given to illustrate the model.
Book ChapterDOI
Dimensioning Bandwidth for Elastic Traffic
TL;DR: This paper considers two dimensioning methods based on different QoS criteria and finds that the method based on the delay factor is superior in that both the average delay and blocking performance targets can be satisfied.
Posted Content
Performance of CSMA in Multi-Channel Wireless Networks
Thomas Bonald,Mathieu Feuillet +1 more
TL;DR: It is proved that CSMA is optimal in the ad-hoc mode, when each flow goes through a unique dedicated wireless link from a transmitter to a receiver, and proposes a slight modification of CSMA that is referred to as flow-aware CSMA, which makes the algorithm optimal in all cases.
Dissertation
Routing Optimization and Capacity Assignment in Multi-Service IP Networks
TL;DR: This dissertation presents novel methods for routing optimization and capacity assignment in multi-service IP networks, both of which are key processes of traffic engineering and network planning.
References
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Random Perturbations of Dynamical Systems
M. I. Freĭdlin,A. D. Ventt︠s︡elʹ +1 more
TL;DR: In this article, the authors introduce the concept of random perturbations in Dynamical Systems with a Finite Time Interval (FTI) and the Averaging Principle.
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Vern Paxson,Sally Floyd +1 more
TL;DR: It is found that user-initiated TCP session arrivals, such as remote-login and file-transfer, are well-modeled as Poisson processes with fixed hourly rates, but that other connection arrivals deviate considerably from Poisson.
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Self-similarity through high-variability: statistical analysis of Ethernet LAN traffic at the source level
TL;DR: In this article, the authors provide a plausible physical explanation for the occurrence of self-similarity in local-area network (LAN) traffic, based on convergence results for processes that exhibit high variability and is supported by detailed statistical analyzes of real-time traffic measurements from Ethernet LANs at the level of individual sources.
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TCP/IP Illustrated Vol 1 The Protocols
TL;DR: TCP/IP Illustrated, Volume 1 is a complete and detailed guide to the entire TCP/IP protocol suite - with an important difference from other books on the subject: rather than just describing what the RFCs say the protocol suite should do, this unique book uses a popular diagnostic tool so you may actually watch the protocols in action.