Abstract: A system may receive a test signal from a first server; monitor network activity associated with the device; determine when the device is in an idle state based on the network activity associated with the device; generate a first packet based on receiving the test signal and based on determining when the device is in the idle state; provide the first packet to a second server; receive a second packet from the second server based on providing the first packet to the second server, the second packet authorizing the device to perform the network test; communicate with a third server, associated with the second packet, to perform the network test independently of the first and/or second server; generate test results based on performing the network test; and provide the test results to the second server, the second server being capable of generating performance data based on the test results.

Abstract: A system may receive a test signal from a first server; monitor network activity associated with the device; determine when the device is in an idle state based on the network activity associated with the device; generate a first packet based on receiving the test signal and based on determining when the device is in the idle state; provide the first packet to a second server; receive a second packet from the second server based on providing the first packet to the second server, the second packet authorizing the device to perform the network test; communicate with a third server, associated with the second packet, to perform the network test independently of the first and/or second server; generate test results based on performing the network test; and provide the test results to the second server, the second server being capable of generating performance data based on the test results.

Abstract: A method for improving network performance using a virtual queue is disclosed. The method includes measuring characteristics of a packet arrival process at a network element, establishing a virtual queue for packets arriving at the network element, and modeling the packet arrival process based on the measured characteristics and a computed performance of the virtual queue.

Abstract: In one of many possible embodiments, a method may comprise using one or more packet delivery monitoring packets to monitor packet delivery between a first reference node and a second reference node communicatively coupled to one another by at least one network path, each of said PDM packets comprising an Internet Control Message Protocol packet modified to include at least one packet delivery monitoring extension.

Abstract: The disclosed technology provides systems and methods for accommodating a diversity of services (e.g., telephone, video broadcasting, email, etc.) using a fixed connection of a certain service type. A method and system of communicating data using a fixed connection, including, based on at least two service data units (SDUs), associating a priority and a channel identifier with the at least two SDUs, iteratively (i) selecting one of the at least two SDUs based on priority to provide a selected SDU, and, (ii) forming at least one data packet, the at least one data packet including (a) data associated with the selected SDU, and, (b) the channel identifier associated with the selected SDU; and, transmitting the formed at least one data packet using the fixed connection.

Abstract: In one embodiment, a system includes a first network device configured to communicate on a first communication layer, and a second network device configured to communicate on a second communication layer. The system further includes a router communicatively coupled to the first and second network devices through at least one network path. The at least one router includes a ping inter-working unit configured to support the transmission of a message between the first and second network devices through the at least one network path.

Abstract: In one of many possible embodiments, a system includes a first reference node and a second reference node communicatively coupled to the first reference node by at least one network path, the reference nodes being configured to support transmission of a packet flow between one another over the network path. Each of the reference nodes is configured to count data packets received, the data packets being associated with the packet flow, and to latch a count of a number of the data packets received. The system includes a monitoring protocol configured to request the reference nodes to latch the respective counts. The monitoring protocol is further configured to retrieve the respective counts from the reference nodes and use the counts to determine a packet delivery measurement associated with the transmission of the packet flow between the reference nodes.

Abstract: A device receives a list of uniform resource locators (URLs), selects a web page URL from the list of URLs, and requests, via a browser application, content corresponding to the selected web page URL. The device also receives, via a packet capture, a web page associated with the selected web page URL, derives performance information associated with the packet capture, parses the packet capture to extract page level statistics, connection level statistics, and inline object level statistics, and stores the page level statistics, the connection level statistics, and the inline object level statistics to output files.

Abstract: Systems, methods, and apparatus are provided for emulating the performance effect on network traffic flow traversing a node in a communications network. According to one illustrative embodiment, a method of emulating traffic through a node is provided. The method includes generating foreground traffic through the node; simulating a first background traffic having a first weight at the node; simulating a second background traffic having a second weight at the node; determining an effect of the first and second background traffic on the foreground traffic; and making a forwarding decision with respect to the foreground traffic based on the effect.

Abstract: System, methods and apparatii are provided for emulating the performance effect on network traffic flow traversing a node in a communications network. According to one illustrative embodiment, a method of emulating the performance effect on network traffic through a node is provided that includes generating foreground traffic through the node; simulating background traffic at the node; determining an effect of the background traffic on the foreground traffic; and making a forwarding decision with respect to the foreground traffic based on the effect.

Abstract: A method for improving network performance using a virtual queue is disclosed. The method includes measuring characteristics of a packet arrival process at a network element, establishing a virtual queue for packets arriving at the network element, and modeling the packet arrival process based on the measured characteristics and a computed performance of the virtual queue.

Abstract: A device receives a list of uniform resource locators (URLs), selects a web page URL from the list of URLs, and requests, via a browser application, content corresponding to the selected web page URL. The device also receives, via a packet capture, a web page associated with the selected web page URL, derives performance information associated with the packet capture, parses the packet capture to extract page level statistics, connection level statistics, and inline object level statistics, and stores the page level statistics, the connection level statistics, and the inline object level statistics to output files.

Abstract: A method for improving network performance using a virtual queue is disclosed. The method includes measuring characteristics of a packet arrival process at a network element, establishing a virtual queue for packets arriving at the network element, and modeling the packet arrival process based on the measured characteristics and a computed performance of the virtual queue.

Abstract: A method for improving network performance using a virtual queue is disclosed. The method includes measuring characteristics of a packet arrival process at a network element, establishing a virtual queue for packets arriving at the network element, and modeling the packet arrival process based on the measured characteristics and a computed performance of the virtual queue.

Abstract: A magnetic resonance (MR) imaging system includes a magnet for producing a magnetic field to which a patient is subjected, a radio frequency (RF) transmitter coupled to a body coil within the magnet, an RF receiver coupled to a surface coil within the magnet and placed as close as possible to tissue being analyzed by the MR imaging system, and a computer controlled system for generating RF signals sent from the transmitter and detected by the receiver for use in producing nuclear excitation and corresponding detected induced currents in the surface coil sent to an analog-to-digital converter and then to the computer for processing into an image display of the tissue under analysis.