Search results for "Network Congestion"

showing 4 items of 24 documents

Specification and Implementation of Multicast Congestion Control Stair Protocol: Use Case with Multimedia Ubiquitous Networks

2008

Ubiquitous and efficient multicast data delivery service is essential to the success of large-scale group communication applications. In this framework, congestion control through ubiquitous networks is a hot topic for multicast real time protocols. In this paper, authors present specification and implementation of simulate TCP's AIMD with rate-based (STAIR), a multicast congestion control mechanism. Authors have enhanced this approach because they have modeled it using Unified Modeling Language with real time extensions (UML-RT) as a formal specification tool. More to the point point, they introduce a multimedia ubiquitous network which they have used as a reference model to promote their …

Ubiquitous computingProtocol Independent MulticastMultimediaMulticastComputer sciencebusiness.industryDistributed computingcomputer.software_genreNetwork congestionSource-specific multicastFormal specificationCommunication in small groupsXcastbusinesscomputerComputer network2008 The Second International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies
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Supporting scalable video transmission in MANETs through distributed admission control mechanisms

2009

Emerging multimedia applications over mobile devices are becoming very popular, especially over infrastructure wireless networks such as cellular and WLANs. However, providing this kind of services over infrastructureless networks like ad hoc networks presents many additional problems. One of these problems is how to share resources fairly among the users involved. In this article we propose a QoS framework supporting scalable video streaming in mobile ad hoc networks based on distributed admission control and video traffic awareness. Our framework promotes fairness between video flows in terms of resource consumption. It also guarantees a significant reduction of the idle times experienced…

Wireless ad hoc networkComputer scienceWireless networkbusiness.industryQuality of serviceComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSMobile computingMobile ad hoc networkAdmission control:Enginyeria de la telecomunicació::Telemàtica i xarxes d'ordinadors::Serveis telemàtics i de comunicació multimèdia [Àrees temàtiques de la UPC]Video qualityNetwork congestionVídeo -- TransmissióAd hoc networks (Computer networks) -- Access controlbusinessComputer network
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Interference Estimation in IEEE 802.11 Networks

2010

This article describes a technique for distinguishing and quantifying medium access control (MAC) and physical layer (PHY) interference in error-prone 802.11 networks. This technique, is fully distributed, allowing each station to estimate interference individually. The estimator is based on an extended Kalman filter coupled to a mechanism for revealing abrupt changes in state. The network state is a vector of two components, representing PHY interference, expressed in terms of channel-error rate, and MAC interference. Two distinct state models are considered. When PHY interference can be assumed to be constant for all stations, network congestion is expressed by the number of competing ter…

business.industryComputer scienceSettore ING-INF/03 - TelecomunicazioniWiFiComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSPhysical layerKalman filterInterference (wave propagation)Network congestionExtended Kalman filterIEEE 802.11Control and Systems EngineeringPHYModeling and SimulationComputer Science::Networking and Internet ArchitectureElectronic engineeringWirelessElectrical and Electronic EngineeringbusinessKalman FilterComputer Science::Information Theory
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An enhanced TCP congestion avoidance scheme and its performance evaluation in high speed satellite networks

2009

©2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE." Article also available from publisher: http://dx.doi.org/10.1109/ICICS.2009.5397691 High speed satellite communication networks are emerging as part of the future global wireless communication systems. However, existing transmission control protocols for satellite networks do not provide satisfactory performance over high speed satellite links due to their ine…

business.industryComputer scienceTransmission Control ProtocolComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSReal-time computingTCP tuningScalable TCPVDP::Technology: 500::Information and communication technology: 550ThroughputH-TCPNetwork congestionComputer Science::Networking and Internet ArchitectureCommunications satellitebusinessBIC TCPComputer network2009 7th International Conference on Information, Communications and Signal Processing (ICICS)
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