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

共 1643 条记录，以下是1401-1410 订阅

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NEAT versus PSO for Evolving Autonomous Multi-agents Coordination on Pursuit-Evasion Problem

NEAT versus PSO for Evolving Autonomous Multi-agents Coordin...

引用

2011 3rd International Asia conference on Informatics in control, Automation and Robotics(CAR 2011)

作者： Jin Zhao Gang Peng Department of Control Science and Engineering Huazhong University of Science and Technology Key Laboratory of Image Processing and Intelligent Control of Education Ministry

A method based on multi-agents and ANN(Artificial Neural network)was proposed to solve the pursuit-evasion task in continuous timevarying *** to this method,several autonomous agents with 8 circular sector sensors and an ANN controller were used to form a coordinated behavior to capture the *** evolve the controller,NEAT(Neuro Evolution of Augmenting Topologies)and PSO(Particle Swarm optimization)method were used to optimize the *** simulation experiments show that both methods can successfully evolve the controller to capture the evaders,while NEAT requires less swarm members and consume less time comparing to PSO method.

关键词： Pursuit Multi-agents,Artificial Neural network(ANN),Neuro Evolution of Augmenting Topologies(NEAT),Particle Swarm optimization(PSO)

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Design of 2-level hierarchical ring networks

Design of 2-level hierarchical ring networks

引用

International conference on Ultra Modern Telecommunications and Workshops (ICUMT)

作者： Kishore Kshirsagar Kesav Kaza Krishnan Rajan International Institute of Information Technology Hyderabad India

Hierarchical Ring networks are widely used in communication systems, logistics and shared multiprocessors. It is hence imperative that efficient design of these structures has to be carried out, to reduce costs of their installation and help increase the ease of management. In this paper, we look at the problem of designing efficient 2-level Hierarchical Ring networks, in the context of link costs optimization. 2-level HRNs only have two kinds of rings - local rings to connect disjoint sets of nodes and a global ring to interconnect all the local rings. We present an algorithm that is based on Simulated Annealing. We present results for scenarios containing upto 300 nodes. The results obtained from the algorithm are most encouraging.

关键词： Cost function Annealing Simulated annealing Algorithm design and analysis Joining processes network topology Topology

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The impact of social distance on utility based resource allocation in next generation networks

The impact of social distance on utility based resource allo...

引用

International conference on Ultra Modern Telecommunications and Workshops (ICUMT)

作者： Georgios I. Tsiropoulos Dimitrios G. Stratogiannis Nikolaos Mantas Malamati Louta School of Electrical & Computer Engineering National Technical University of Athens Athens Greece Department of Informatics and Telecommunications Engineering University of Western Macedonia Kozani Greece

Social networks have rapidly grown over the last years. The socio-technical information that they include may be exploited to improve the performance of the underlying communication network. This is of utmost importance especially in Next Generation networks (NGNs), which provide multiple services with increased bandwidth requirements. In this paper, the problem of resource allocation in a bottleneck link of a NGN is examined. To this end, a utility based technique is proposed, which integrates the information of an overlaid social network expressed by the social distance parameter. In this case, the utility function employed is reformed, so as to incorporate this parameter, which in this study is determined by the users' average popularity. network users are classified into friendship classes according to the social distance parameter. Then, the users' resource allocation objective is formulated as an optimization problem with inequality constraints. Due to the increased problem's complexity, a numerical method is employed to estimate the optimal resource allocation. Numerical results are presented, which indicate the impact of the social distance parameter on resource allocation.

关键词： Resource management Social network services Bandwidth Next generation networking Quality of service Channel allocation Measurement

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Study of Node Localization Algorithm Based on Improved Particle Swarm optimization and RSSI for WSNs

Study of Node Localization Algorithm Based on Improved Parti...

引用

2011 3rd International Asia conference on Informatics in control, Automation and Robotics(CAR 2011)

作者： Shen Ming-yu Lu Ya-jing Zhao Ming-shun School of Computer & Information Hefei University of Technology

Based on RSSI ranging and trilateration positioning,an improved particle swarm optimization combined with RSSI self-correcting localization algorithm for Wireless Sensor networks was *** results showed that the accuracy of this algorithm increased by almost 30%than trilateration,while improving the particle swarm optimization algorithm which may hardly converge to the optimal solution as falling into the local extreme *** algorithm obtained better solution than node localization based on particle swarm optimization for WSNs,and then enhance the stability and convergence of the algorithm.

关键词： Wireless Sensor network,RSSI ranging,Particle Swarm optimization,localization accuracy

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GoP-level distortion optimization for video quality enhancement in MANETs

GoP-level distortion optimization for video quality enhancem...

引用

International conference on Ultra Modern Telecommunications and Workshops (ICUMT)

作者： Pejman Goudarzi Mehdi Hosseinpour Farima Ayatollahi Multimedia Department IT Faculty of Iran Telecommunication Research Center Iran

Quality of Experience (QoE) enhancement for a transmitted video sequence in Mobile Ad hoc networks (MANETs) is a challenging and important issue in networking research community. Intrinsic high levels of packet error probability in MANETs can cause high levels of distortion based on the position of packet loss in transmitted Intra-coded (I), Predicted (P) and Bi-predictive (B) frames. Hence, exact modelling of the impact of packet loss on the video quality and the resulting distortion is an important task. Many conventional distortion modelling techniques simply consider a linear relationship between the packet loss and distortion which is inaccurate. The main contributions of the current work are twofold. At first, an accurate model has been developed which can capture the exact effect of network packet loss on the video distortion (and hence on the QoE) with Group Of Picture (GOP)-level granularity. Then, based on this model, an optimal bandwidth allocation strategy is being developed in MANETs which based on some network-specific constraints, the loss-induced distortion associated with a video sources is being minimized using some cross-layer design techniques. Finally, the resulting optimal rates can be used as rate-feedbacks for on-line rate adaptation of a moderate video encoder such as H.264. Some numerical analysis have been presented to validate the theoretical results and to verify the claims.

关键词： Ad hoc networks Streaming media optimization Mobile computing Wireless communication PSNR Quality of service

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Femto-to-Macro control Channel Interference Mitigation via Cell ID Manipulation in LTE

Femto-to-Macro Control Channel Interference Mitigation via C...

引用

IEEE conference on Vehicular Technology (VTC)

作者： Zubin Bharucha Gunther Auer Tetsushi Abe Nobuhiko Miki DOCOMO Euro Laboratories Munich Germany NTT DOCOMO Research and Development Center Yokosuka Kanagawa Japan

With considerable interest being garnered in recent years, femto-cells are seen as a major contender to significantly increase capacity and fill coverage holes in 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) cellular networks. User- deployed femto-cells, each exclusively serving a set of registered users and sharing the same frequency spectrum as the overlay macro-cells are already defined in 3GPP specifications. Such a co- channel and random deployment of femto-cells can cause heavy downlink (DL) interference to a user equipment (UE) in the vicinity of one or more femto-cells and not belonging to their closed subscriber groups (CSGs). In this paperwe focus on protection of the most important LTE DL control channel, known as the physical control format indicator channel (PCFICH). Failure to decode this channel correctly results in the loss of the subsequent subframe. A technique which mitigates femto-to-macro PCFICH interference by carefully manipulating the physical cell identity (PCI) of the aggressor femto-cell is presented. It is shown that employing this technique results in a significant improvement of PCFICH effective signal- to- interference-plus-noise ratio (SINR) without the need for any additional network signaling.

关键词： Interference OFDM Signal to noise ratio Frequency domain analysis Transmitting antennas Bandwidth Indexes

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Achieving Fairness and Efficiency for Association control in the Heterogeneous Wireless networks

Achieving Fairness and Efficiency for Association Control in...

引用

2011 IEEE 3rd International conference on Communication Software and networks(ICCSN 2011)

作者： Yong JIANG State Key Laboratory of networking and Switching Technology Beijing University of Posts and Telecommunications Beijing,China Jiancheng QIN School of Computer Science Beijing University of Posts and Telecommunications Beijing,China

In the heterogeneous wireless network environment, uneven traffic distribution among different wireless access networks results in the distinction of user network resource.A load balancing scheme is proposed to balance load of diverse access networks,lower unfairness of user bandwidth and improve efficiency of heterogeneous wireless networks(HWNs) resource by association control *** optimization goal of association control is to achieve user max-min fairness *** fairness bandwidth allocation in HWNs is NP- hard problem so an approximation algorithm of polynomial- time is presented to achieve suboptimal *** simulation demonstrates the presented algorithm's performance in user bandwidth fairness and whole system efficiency.

关键词： HWNs association control max-min fairness bandwidth load balancing

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A polynomial multicommodity flow problem with difficult path generation

A polynomial multicommodity flow problem with difficult path...

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International conference on Ultra Modern Telecommunications and Workshops (ICUMT)

作者： Dritan Nace Michaf Pióro Artur Tomaszewski Mateusz Żotkiewicz Laboratoire Heudiasyc UMR CNRS 6599 Université de Technologie de Compiègne Compiègne France Departrnent of Electrical and Information Technology Lund University Sweden Institute of Telecommunications Warsaw University of Technology Poland

In the paper we consider a commonly known network design problem with demand restoration assuming stub release. No compact linear programming (LP) formulation for the problem is known, and all known non-compact LP formulations of the problem require NP-hard path generation (pricing). Therefore, the problem itself is suspected to be NP-hard - this, however, is not actually known. The main result of our paper reveals a special case of the basic problem for which the resulting non-compact LP formulation still has an NP-hard pricing problem, the corresponding compact LP formulation is not known either, but the problem itself is polynomial. The considered special case assumes only one failing link so that all the links but one are assumed to be 100% reliable. The constructed case of a polynomial multicommodity flow problem with difficult path generation is of interest since no such problem is, to the best of our knowledge, widely known.

关键词： Pricing optimization Polynomials Linear programming Routing Telecommunications Reliability

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An Multi-agent Artificial Immune network Algorithm and Its Application

An Multi-agent Artificial Immune Network Algorithm and Its A...

引用

2011 3rd International Asia conference on Informatics in control, Automation and Robotics (CAR 2011 LNEE 132)

作者： Xuhua Shi Institute of Information Science and Engineering Ning Bo University

An multi-agent artificial immune network algorithm(Maopt-ai Net) is introduced in this paper. Unlike other intelligent algorithms, Maopt-ai Net combines the idea of immune mechanics and multi-agent technology to overcome premature problem and fully make use of the agent ability of sensing and acting on the environment. The operators of Maopt-ai Net include neighborhood clonal selection, neighborhood competition, self-confidence motivation, and neighborhood collaboration. The performance of the proposed method is studied with the use of six benchmark problems and compared with other well-known intelligent algorithms. The experiments conducted show that Maopt-ai Net outperforms the other algorithms. Furthermore, it is applied to determine the murphree efficiency of the distillation column, and satisfactory results are obtained.

关键词： optimization,immune network,multi-modal optimization

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Differentiated QoE provisioning for video delivery over wireless networks

Differentiated QoE provisioning for video delivery over wire...

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International conference on Ultra Modern Telecommunications and Workshops (ICUMT)

作者： Pejman Goudarzi Mohammad R. Nezami Ranjbar Farima Ayatollahi Multimedia Department IT Faculty of Iran Telecommunication Research Center Teheran Iran

Delivering digital video content with enhanced quality of experience to the end users over error-prone multi-hop wireless networks is a challenging issue. In video transmission over such wireless networks, many network-based (packet loss, delay etc.) and source-based (encoding quantization level etc.) parameters can impair the perceived video quality. In a video quality enhancement strategy, accurate video quality metrics play a crucial role in the designing process of optimal rate (bandwidth) allocation algorithms. Many cross-layer optimization (CLO) based rate allocation strategies have been developed for this purpose which consider different objective functions (congestion level, total packet loss etc.) in wireless networks. The main contributions of the proposed work are twofold. At first, an optimal bandwidth allocation framework is being developed in which based on some network-specific constraints and by incorporating an accurate video quality metric, the total weighted quality of experience of some competing video sources is being optimized bases on cross-layer design techniques. Secondly, these optimal rates have been used for differentiated Quality of Experience (QoE) enforcement between multiple competing video sources. The resulting optimal rates can be used as rate-feedbacks for on-line rate adaptation of a moderate video encoder such as MPEG4. The aforementioned weight parameters are selected based on the importance of each video sequence's quality and can be associated with some previous service level agreement (SLA) based prices. Some numerical analysis have been presented to validate the theoretical results and to verify the claims.

关键词： Streaming media Wireless communication optimization Bandwidth Ad hoc networks Resource management Measurement

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