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检索条件"任意字段=3rd Euro-NF Conference on Network Control and Optimization, NET-COOP 2009"

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network control and optimization - Third euro-nf conference, net-coop 2009, Proceedings

引用

3rd euro-nf conference on network control and optimization, net-coop 2009

ISBN: (纸本)3642104053

The proceedings contain 18 papers. The topics discussed include: stability properties of networks with interacting TCP flows;quantile sensitivity estimation;performance evaluation of multi-rate streaming traffic by quasi-stationary modeling;on opportunistic cooperation for improving the stability region with multipacket reception;a restless bandit marginal productivity index for opportunistic spectrum access with sensing errors;content-based routing in networks with time-fluctuating request rates;a queuing-based approach to overload detection;rare-event simulation for tandem queues: a simple and efficient importance sampling scheme;an anonymous sequential game approach for battery state dependent power control;probabilistic analysis of hierarchical cluster protocols for wireless sensor networks;user association to optimize flow level performance in wireless systems with dynamic interference;and control of multipath TCP and optimization of multipath routing in the Internet.

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Probabilistic Analysis of Hierarchical Cluster Protocols for Wireless Sensor networks

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3rd euro-nf conference on network control and optimization

作者： Kaj, Ingemar Uppsala Univ Dept Math SE-75106 Uppsala Sweden

ISBN: (纸本)9783642104053

Wireless sensor networks are designed to extract data from the deployment environment and combine sensing, data processing and wireless communication to provide useful information for the network users. Hundreds or thousands of small embedded units, which operate under low-energy supply and with limited access to central network control, rely on interconnecting protocols to coordinate data aggregation and transmission. Energy efficiency is crucial and it has been proposed that cluster based and distributed architectures such as LEACH are particularly suitable. We analyse the random cluster hierarchy in tins protocol and provide a solution for low-energy and limited-loss optimization. Moreover, we extend these results to a multi-level version of LEACH, where clusters of nodes again self-organize to form clusters of clusters, and so on.

关键词： LEACH Cluster head Hierarchical protocol Voronoi cluster Low-energy sensor network

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control of Multipath TCP and optimization of Multipath Routing in the Internet

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3rd euro-nf conference on network control and optimization

作者： Wischik, Damon Handley, Mark Raiciu, Costin UCL Dept Comp Sci London WC1E 6BT England

ISBN: (纸本)9783642104053

There are moves in the Internet architecture community to add multipath capabilities to TCP, so that end-systems will be able to shift their traffic away from congested parts of the network. We study two problems relating to the design of multipath TCP. (i) We investigate stochastic packet-level behaviour of some proposed multipath congestion control algorithms, and find that they do not behave how we might expect from fluid modeling: they tend to flap randomly between their available paths. We explain why, and propose a congestion control algorithm that does not flap. (ii) We consider how the path choice offered by the network affects the ability of end-systems to shift their traffic between a pool of resources. We define a 'resource poolability' metric, which measures for each resource how easy it is for traffic to be shifted away from that resource e.g. in the event of a traffic surge or link failure.

关键词： multipath TCP congestion control resource pooling fluid model load balancing

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An Anonymous Sequential Game Approach for Battery State Dependent Power control

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3rd euro-nf conference on network control and optimization

作者： Wiecek, Piotr Altman, Eitan Hayel, Yezekael Wroclaw Univ Technol Inst Math & Comp Sci Wybrzeze Wyspianskiego 27 PL-50370 Wroclaw Poland INRIA F-06902 Sophia Antipolis France Universite Avignon LIA F-84911 Avignon France

ISBN: (纸本)9783642104053

The sensitivity of mobile terminals to energy and power limitations keeps posing challenges to wireless technology. The ratio between the useful signal's power and that of noise and interferences has a crucial impact on the achievable throughputs and on outage aspects, little has been done concerning another central challenge that limited energy poses: that of limitation on battery life. In this paper we study power control in a way that combines the two aforementioned aspects. We propose a modeling approach which extends the Anonymous Sequential Came framework introduced in 1988 by Jovanovic and Rosenthal. The approach is designed for systems that have a very large number of interacting decision makers, so large that they can be modeled as a continuum of players. We introduce an appropriate equilibrium concept for this game (which extends the Wardrop equilibrium by including random individual states with controlled transitions), characterize the structure of the equilibrium policies and provide two efficient equilibrium computation procedures.

关键词： Power control

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Alpha-Fair Resource Allocation under Incomplete Information and Presence of a Jammer

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3rd euro-nf conference on network control and optimization

作者： Altman, Eitan Avrachenkov, Konstantin Garnaev, Andrey INRIA Sophia Antipolis Sophia Antipolis France St Petersburg State Univ St Petersburg 199034 Russia

ISBN: (纸本)9783642104053

In the present work we deal with the concept of alpha-fair resource allocation in the situation where the decision maker (in our case, the base station) does not have complete information about the environment. Namely, we develop a concept of a-fairness under uncertainty to allocate power resource in the presence of a jammer under two types of uncertainty: (a) the decision maker does not have complete knowledge about the parameters of the environment, but knows only their distribution, (b) the jammer can come into the environment with some probability bringing extra background noise. The goal of the decision maker is to maximize the a-fairness utility function with respect to the SNIR (signal to noise-plus-interference ratio). Here we consider a concept of the expected a-fairness utility function (short-term fairness) as well as fairness of expectation (long-term fairness). In the scenario with the unknown parameters of the environment the most adequate approach is a zero-sum game since it can also be viewed as a minimax problem for the decision maker playing against the nature where the decision maker has to apply the best allocation under the worst circumstances. In the scenario with the uncertainty about jamming being in the system the Nash equilibrium concept is employed since the agents have non-zero sum payoffs: the decision maker would like to maximize either the expected fairness or the fairness of expectation while the jammer would like to minimize the fairness if he comes in on the scene. For all the plots the equilibrium strategies in closed form are found. We have shown that for all the scenarios the equilibrium has to be constructed into two steps. In the first step the equilibrium jamming strategy has to be constructed based on a solution of the corresponding modification of the water-filling equation. In the second step the decision maker equilibrium strategy has to be constructed equalizing the induced by jammer background noise.

关键词： Wireless networks Power control Incomplete Information Nash Equilibrium Saddle Point

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Tariffs, Mechanisms and Equilibria at a Single Internet Link

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3rd euro-nf conference on network control and optimization

作者： Courcoubetis, Costas Dimakis, Antonis Athens Univ Econ & Business Dept Informat Athens 10434 Greece

ISBN: (纸本)9783642104053

We analyze the interplay between the demand for downloads, choice of congestion control mechanism, and tariff structure at a single link, when users have preferences in terms of average download delay and they are charged according to the number of ECN marked packets they receive. Our model involves a timescale separation approach, where in the fast timescales active flows compete for instantaneous bandwidth share by optimally tuning congestion control parameters in a noncooperative fashion. This is modeled by letting flows choose utility functions within the network utility maximization framework laid down by Kelly [1]. On a slower timescale, users selfishly change their otherwise unrestricted demand for downloads based on the average experienced download delay and charges incurred. We study the equilibrium of this loop of interactions from the point of view of social welfare. For homogeneous users we find that optimal equilibria are induced when they choose among linear utility functions, while this is not the case for logarithmic, i.e., proportionally fair congestion controllers. We next consider two types of users, web-browsing and bittorrent, where the latter are much less sensitive to download delay than the former. If bittorrent users respond to congestion according to proportionally fair utility functions the charge induced by ECN marked packets does not provide the correct signal for service differentiation and the resulting equilibrium is suboptimal. On the other hand, if flows are charged for the volume of bits they transfer as well, then social welfare maximum is attained for some price per bit. This reveals a new role for bit volume pricing: to provide bittorrent users the correct incentives for choosing congestion controllers that effectively give priority to web-browsing users.

关键词： pricing congestion control congestion marks noncooperative equilibrium

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network control and optimization 1

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丛书名： Lecture Notes in Computer Science

1000年

作者： Rudesindo Núñez-Queija Jacques Resing

ISBN: (数字)9783642104060

ISBN: (纸本)9783642104053

We are proud to present the proceedings of net-coop 2009, the inter- tionalconferenceonnetworkcontrolandoptimization,co-organizedbyEURAN- DOM/Eindhoven University of Technology and CWI. This year’s conference at EURANDOM, held November 23–25, was the third in line after previous e- tions in Avignon (2007) and Paris (2008). net-coop 2009 was organized in conjunction with the euro-nf workshop on “New Trends in Modeling, Quan- tative Methods, and Measurements. ” While organized within the framework of euro-nf, net-coop enjoys great interest beyond euro-nf, as is attested by the geographic origins of the papers in these proceedings. Thenet-coopconferencefocusesonperformanceanalysis,controland- timization of communication networks, including wired networks, wireless n- works, peer to peer networks and delay tolerant networks. In each of these domains network operators and service providers face the challenging task to e?ciently provide service at their customer’s standards in a highly dynamic - vironment. Internet tra?c continues to grow tremendously in terms of volume as well as diversity. This development is fueled by the increasing availability of high-bandwidth access (both wired and wireless) to end users, opening new ground for evolving and newly emerging wide-band applications. The increase in network complexity, as well as the plurality of parties involved in network operation, calls for e?cient distributed control. New models and techniques for the control and optimization of networks are needed to address the challenge of allocating communication resources e?ciently and fairly, while accounting for non-cooperative behavior.

关键词： Computer Communication networks System Performance and Evaluation Computer Systems Organization and Communication networks Information Systems and Communication Service Information Systems Applications (incl. Internet) Algorithm Analysis and Problem Complexity

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