Search results for "Network interface"

showing 3 items of 13 documents

A readout unit for high rate applications

2002

The LHCb readout unit (RU) is a custom entry stage to the readout network of a data-acquisition or trigger system. It performs subevent building from multiple link inputs toward a readout network via a PCI network interface or alternatively toward a high-speed link, via an S-link interface. Incoming event fragments are derandomized, buffered and assembled into single subevents. This process is based on a low-overhead framing convention and matching of equal event numbers. Programmable logic is used both in the input and output stages of the RU module, which may be configured either as a data-link multiplexer or as entry stage to a readout or trigger network. All FPGAs are interconnected via…

Hardware architectureNuclear and High Energy Physicsbusiness.industryComputer scienceInitializationNetwork interfaceMultiplexingMultiplexerlaw.inventionProgrammable logic deviceMicroprocessorNuclear Energy and EngineeringlawElectronic engineeringElectrical and Electronic EngineeringbusinessField-programmable gate arrayComputer hardwareIEEE Transactions on Nuclear Science
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Gigabit Ethernet backbones with active loops

2001

The current standard Ethernet switches are based on the Spanning Tree (ST) protocol. Their most important restriction is that they can not work when the topology has active loops. In fact, the ST protocol selects a tree from the real topology by blocking the links that are not involved in the tree. This restriction produces a network traffic unbalancing behavior saturating those link near the root switch while rest of links will be idle or with a very low utilization. This paper proposes a new transparent switch protocol for Gigabit Ethernet backbones that considerably improves the performance of current ones. The proposed protocol is named ALOR for Active Loops and Optimal Routing. ALOR pr…

EthernetMedia Redundancy ProtocolEthernet Global Data ProtocolComputer sciencebusiness.industryComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSEthernet flow controlGigabit EthernetLocal area networkCore networkJumbo frameSpanning Tree ProtocolNetwork topologyMetro EthernetSynchronous EthernetNetwork interface controllerGigabitEtherChannelFiber Distributed Data InterfacebusinessATA over EthernetComputer networkCarrier EthernetInternational Conference on Parallel Processing, 2001.
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Using WMS log files as an indicator of QoS and application performance in on-demand streaming videos

2012

When utilizing video streaming for professional purposes, the quality of service needs to be evaluated by the service provider. This is the case especially when the service must be available for a large number of customers with a wide range of network interfaces and terminal equipment. Service providers have usually information about network-level metrics. However, the problem is that conditions that appear similar in a networklevel may cause very different responses in an application level, and the other way round. In this article, we study how Windows Media Server's log files can be used to evaluate the QoS of video transmission, and we also examine the application level performance based…

Service (business)business.industryComputer sciencecomputer.internet_protocolQuality of serviceWindows MediaReal Time Streaming ProtocolNetwork interfaceMobile QoSService providerbusinesscomputerComputer network2012 18th IEEE International Conference on Networks (ICON)
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