0000000000219288

AUTHOR

Luigi Fratta

showing 4 related works from this author

PCP: An End-to end Measurement Based Call Admission Control for Real-Time Services Over IP Networks

2000

Distributed end-to-end measurement based connection admission control mechanisms have been recently proposed. The goal of these schemes is to provide tight QoScon trol on a per connection basis by means of measurements taken by the edge nodes and priority based forwarding procedure at internal nodes. Since the additional flows handling procedures are implemented at the border routers and the forwarding mechanisms are for flows aggregates only, the approach is fully scalable and compatible with the IETF Differentiated Service proposal. The aim of this paper is to propose specific schemes and to investigate the advantages and limits of the approach by analyzing the basic mechanisms and evalua…

Core routerVoice over IPEnd-to-end principleNetwork packetComputer sciencebusiness.industryCall Admission ControlAdmission controlTelephonyDifferentiated servicebusinessComputer network
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Adenoviral RB2/p130 gene transfer inhibits smooth muscle cell proliferation and prevents restenosis after angioplasty.

1999

Abstract —Smooth muscle cell (SMC) proliferation that results in neointima formation is implicated in the pathogenesis of atherosclerotic plaques and accounts for the high rates of restenosis that occur after percutaneous transluminal coronary angioplasty, a widespread treatment for coronary artery disease. Endothelial lesions trigger intense proliferative signals to the SMCs of the subintima, stimulating their reentry into the cell cycle from a resting G 0 state, resulting in neointima formation and vascular occlusion. Cellular proliferation is negatively controlled by growth-regulatory or tumor-suppressor genes, or both, such as the retinoblastoma gene family members ( RB/p105, p107, RB2…

NeointimaTranscriptional Activationmedicine.medical_specialtyPhysiologyadenovirus; cell cycle; gene therapy; p130; prb2; restenosisCellGenetic VectorsCell Cycle ProteinsPulmonary ArteryMuscle Smooth VascularAdenoviridaeCatheterizationPathogenesisRestenosisRecurrencemedicineAnimalsCarotid StenosisAngioplasty Balloon CoronaryGenes RetinoblastomaCells CulturedNeointimal hyperplasiaWound HealingRetinoblastoma-Like Protein p130business.industryCell growthGenetic transferCell CycleProteinsGenetic TherapyCell cyclemedicine.diseasePhosphoproteinsSurgeryE2F Transcription FactorsRatsDNA-Binding Proteinsmedicine.anatomical_structureCancer researchCardiology and Cardiovascular MedicinebusinessCarotid Artery InjuriesCarrier ProteinsTunica IntimaTranscription Factor DP1Cell DivisionRetinoblastoma-Binding Protein 1Transcription FactorsCirculation research
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Endpoint Admission Control with Delay Variation Measurements for QoS in IP Networks.

2002

In this paper we describe a novel Endpoint Admission Control scheme (EAC) for IP telephony. EAC mechanisms are driven by independent measurements taken by the edge nodes on a flow of packets injected in the network to probe the source to destination path. Our scheme is characterized by two fundamental features. First, it does not rely on any additional procedure in internal network routers other than the capability to apply different service priorities to probing and data packets. Second, the connection admission decision is based on the analysis of the probing flow delay variation statistics. Simulation results, which focus on a IP telephony scenario, show that, despite the lack of core ro…

RouterVoice over IPComputer Networks and Communicationsbusiness.industryComputer scienceNetwork packetQuality of serviceComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSEnd-to-end delayReal-time computingAdmission controlOptical IP SwitchingEnhanced Data Rates for GSM EvolutionbusinessSoftwareComputer network
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PCP-DV: An End-to end Admission Control Mechanism for IP Telephony

2001

In this paper we describe a novel endpoint admission control mechanism for IP telephony:the PCP-DV which is characterized by two fundamental features. First, it does not rely on any additional procedure in internal network routers other than the capability to apply different service priority to probing and data packets. Second, the triggering mechanism for the connection admission decision is based on the analysis of the delay variation statistics over the probing flow. Numerical results for an IP telephony traffic scenario prove that 99th delay percentiles not greater than few ms per router are guaranteed even in overload conditions.

RouterVoice over IPEnd-to-end principleNetwork packetbusiness.industryComputer scienceComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSThe InternetOptical IP SwitchingAdmission controlTelephonybusinessComputer network
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