Abstract: Provided are a computer program product, system, and method for coordinating selection of a path between a source node and a destination node in a network. The source node selects a first path to a destination node based on source switch port utilization information for ports in a local source switch. The source node transmits a path setup message to the destination node over the selected first path. The destination node determines a second path from the source node to the destination node including a selected local source switch port and a local destination switch port based on utilization information in the path setup message and destination switch port utilization information. The destination node transmits to the source node a reply to the path setup message indicating the second path. The source node uses the second path indicated in the reply to communicate with the destination node.

Abstract: Provided are a computer program product, system, and method for allocating bandwidth to communication paths used by nodes in a network. A request is received from a source node of the nodes to communicate with a destination node. A path is selected between the source node and the destination node. A determination is made of a per path allocated bandwidths for links in the selected path based on a number of common paths that share a link with the selected path. Allocated bandwidth for the selected path is set to a minimum of the per path allocated bandwidths for the links in the selected path. Information on the selected path and the allocated bandwidth is transmitted to the source node to use to communicate with the destination node.

Abstract: Embodiments for dynamic bandwidth allocation in cloud network switches in a cloud computing environment are provided. Quality of service (QoS) policies may be dynamically changed in one or more cloud network switches based on dynamically estimating expected traffic demands for each of a plurality of traffic classes, wherein bandwidth is dynamically allocated among queues based on changing the QoS policies.

Abstract: Embodiments for dynamic bandwidth allocation in cloud network switches in a cloud computing environment are provided. Quality of service (QoS) policies may be dynamically changed in one or more cloud network switches based on dynamically estimating expected traffic demands for each of a plurality of traffic classes, wherein bandwidth is dynamically allocated among queues based on changing the QoS policies.

Abstract: A method for detecting Quality of Service degradation in a network flow includes collecting time series data representing statistical information pertaining to a network flow registered with a network flow monitoring service. The time series data is collected from at least two network elements on a path of the network flow configured to report the time series data. The method further includes indicating Quality of Service degradation in the network flow based on a similarity of the time series data to expected time series data being below a specified similarity threshold, and triggering at least one action to address the similarity being below the specified similarity threshold.

Abstract: Techniques for network performance assessment are described. Techniques may include collecting initial measurements relating to transmission of probe traffic between endpoints of endpoint pairs in a plurality of endpoint pairs and clustering the plurality of endpoints into a plurality of endpoint groups. The method may also include determining a plurality of endpoint group pairs and generating a network performance assessment, based on measuring performance metrics pertaining to traffic between endpoints within the endpoint groups in the plurality of endpoint group pairs.

Abstract: Techniques for network performance assessment are described. Techniques may include collecting initial measurements relating to transmission of probe traffic between endpoints of endpoint pairs in a plurality of endpoint pairs and clustering the plurality of endpoints into a plurality of endpoint groups. The method may also include determining a plurality of endpoint group pairs and generating a network performance assessment, based on measuring performance metrics pertaining to traffic between endpoints within the endpoint groups in the plurality of endpoint group pairs.

Abstract: One aspect includes a method to assess virtual network performance, comprising: selecting at least a given pair of endpoints; determining at least one virtual path between the given pair of endpoints; determining at least one underlying network path between the given pair of endpoints; generating one or more flows between the given pair of endpoints over both the virtual path and the underlying network path; collecting one or more measurements for the virtual path and for the underlying network path; and determining at least one score for the given pair of endpoints at least in part by computing at least one ratio between at least one of the one or measurements for the virtual path and at least one of the one or more measurements for the underlying network path.

Abstract: A method for detecting Quality of Service degradation in a network flow includes collecting time series data representing statistical information pertaining to a network flow registered with a network flow monitoring service. The time series data is collected from at least two network elements on a path of the network flow configured to report the time series data. The method further includes indicating Quality of Service degradation in the network flow based on a similarity of the time series data to expected time series data being below a specified similarity threshold, and triggering at least one action to address the similarity being below the specified similarity threshold.

Abstract: Methods and a system are provided for detecting a Quality of Service degradation in a network flow. A method includes configuring, by a monitoring element, at least two network elements on a path of a network flow to report statistical information pertaining to the network flow as time series data. The method further includes collecting, by the monitoring element, the time series data from the network elements. The method also includes computing, by the monitoring element, a similarity of the time series data. The method additionally includes indicating, by the monitoring element, the Quality of Service degradation when the similarity is below a specified similarity threshold.

Abstract: One aspect includes a method to assess virtual network performance, comprising: selecting at least a given pair of endpoints; determining at least one virtual path between the given pair of endpoints; determining at least one underlying network path between the given pair of endpoints; generating one or more flows between the given pair of endpoints over both the virtual path and the underlying network path; collecting one or more measurements for the virtual path and for the underlying network path; and determining at least one score for the given pair of endpoints at least in part by computing at least one ratio between at least one of the one or measurements for the virtual path and at least one of the one or more measurements for the underlying network path.

Abstract: Methods and a system are provided for detecting a Quality of Service degradation in a network flow. A method includes configuring, by a monitoring element, at least two network elements on a path of a network flow to report statistical information pertaining to the network flow as time series data. The method further includes collecting, by the monitoring element, the time series data from the network elements. The method also includes computing, by the monitoring element, a similarity of the time series data. The method additionally includes indicating, by the monitoring element, the Quality of Service degradation when the similarity is below a specified similarity threshold.

Abstract: System and method to calculate video frame delay in a video stream received by a telecommunications endpoint, the method including: locating reference features characteristic of content in the received video stream; calculating, by use of a processor, reduced reference features from the located reference features; receiving reduced reference features of a transmitted video stream, the transmitted video stream corresponding to the received video stream; calculating, by use of a processor, a received trajectory of the reduced reference features from the received video stream; calculating, by use of a processor, a transmitted trajectory of the reduced reference features from the transmitted video stream; and calculating, by use of a processor, video frame delay as a time shift between the received trajectory and the transmitted trajectory.

Abstract: System and method to calculate video frame delay in a video stream received by a telecommunications endpoint, the method including: locating reference features characteristic of content in the received video stream; calculating, by use of a processor, reduced reference features from the located reference features; receiving reduced reference features of a transmitted video stream, the transmitted video stream corresponding to the received video stream; calculating, by use of a processor, a received trajectory of the reduced reference features from the received video stream; calculating, by use of a processor, a transmitted trajectory of the reduced reference features from the transmitted video stream; and calculating, by use of a processor, video frame delay as a time shift between the received trajectory and the transmitted trajectory.

Abstract: A method and apparatus are disclosed that seek to improve the quality of service that is experienced during the transmission of a stream of packets across one or more paths. In particular, a transmitting node encodes a source stream of data (e.g., audio, video, etc.) into one or more sub-streams, and distributes those sub-streams onto multiple network transmission paths. In accordance with the illustrative embodiment of the present invention, the transmitting node evaluates the quality of service of a first network path that fails to provide a quality-of-service guarantee. When the quality of service of the first network path becomes unsatisfactory, the coding of one or more sub-streams that are being transmitted on a second network path is adjusted. In other words, the coding on a second channel is adjusted in response to the changing conditions on a first channel.

Abstract: Disclosed herein are systems, methods, and non-transitory computer-readable storage media for variable video degradation counter-measures. A system configured according to this disclosure transmits a video communication over a network, detects the video quality degradation of the video communication, selects an appropriate counter-measure based at least in part on the particular type of degradation encountered, and implements the appropriate counter-measure. If multiple transmission paths are available in the system, either completely or partially disjoint, the paths can be evaluated based on ability to deliver video traffic. Throughout the transmission the system continues measuring and monitoring the video quality in real-time. The system can also accurately respond to the type and degree of the degradation by matching the type and degree of degradation to a table containing corresponding counter-measures.

Abstract: System and method to detect video quality degradation in a video stream received by a telecommunications endpoint, the method including: locating reference features characteristic of content in the received video stream; calculating reduced reference features from the located reference features; receiving reduced reference features of a transmitted video stream, the transmitted video stream corresponding to the received video stream; calculating a distance between the reduced reference features in the received video stream and the reduced reference features of the transmitted video stream; and detecting video quality degradation when the calculated distance exceeds a predetermined threshold.

Abstract: A system visualizes and generates reports from stored data, concerning various measured parameters related to a network carrying call traffic. The network is displayed in an easily recognized arrangement, with various parameters being indicated by different shapes and colors for each device on the network. The parameters are changed to indicate the status of the network at different times. More detailed information about a parameter, a device or a path between devices may be obtained simply using a mouse or keystrokes. A variety of different types of detailed displays allows the operator to troubleshoot problems in the network.

Abstract: System and method to calculate video frame delay in a video stream received by a telecommunications endpoint, the method including: locating reference features characteristic of content in the received video stream; calculating, by use of a processor, reduced reference features from the located reference features; receiving reduced reference features of a transmitted video stream, the transmitted video stream corresponding to the received video stream; calculating, by use of a processor, a received trajectory of the reduced reference features from the received video stream; calculating, by use of a processor, a transmitted trajectory of the reduced reference features from the transmitted video stream; and calculating, by use of a processor, video frame delay as a time shift between the received trajectory and the transmitted trajectory.

Abstract: Disclosed herein are systems, methods, and non-transitory computer-readable storage media for approximating video transmission quality capability through a communications network. Initially, a processor is used to insert data into the network through a first endpoint that is delivered to a second endpoint. Then, at least one characteristic of the network between the first and second endpoints is determined based on how the second endpoint receives the data. After the at least one characteristic is determined, a representative video segment is selected based on the at least one characteristic. Finally, the representative video segment is output to demonstrate the video transmission quality capabilities of the network.