A receiving network node (210) configured to select from received packets differing by time of initial transmission from a sending network node (230), and accepting for transmission, based on initial transmission time, the selected packets to an application layer (740). An internetworked processor node configured to: (a) read a sequence number and an originator identifier of a received packet message (810); (b) compare a stored highest sequence number associated with the originator identifier with the received packet sequence number (820); (c) if the received packet sequence number is less than or equal to the stored highest sequence number associated with the originator identifier, then discard (840) the received packet; and (d) if the received packet sequence number is greater than the stored highest sequence number associated with the originator identifier, then deliver (860) the message of the received packet to an application based on an upper layer protocol.

Signaling-less call setup and teardown by employing observed Quality of Experience (QoE) and resource demands. A system provides an environment for supersonic treatment of observed QoE and Quality of Service (QoS) demands for mobile applications. Specifically, a monitoring component is employed to determine session state information associated with a traffic flow, which includes observed QoE and resource demand data. The session state information is stored in a shared memory location and can be analyzed to modify and/or create a network policy for the traffic flow. The network policy is applied to one or more traffic flows to minimize signaling exchanges between a communication network and a mobile station.

The present invention relates to testing signals on a coaxial home network that carries a digital video signal. It has direct application to testing Multimedia over Coax Alliance (MoCA) standards-compliant networks and applies to similar networks such as Data Over Cable Service Interface Specification (DOCSIS), Ethernet, and Wi-Fi. An embedded expert system can guide an inexperienced operator through the process of evaluating and resolving problems with a home network with little operator input.

Embodiments of the present application provide a method for measuring performance of multi-service in a tunnel, including: receiving a measurement message corresponding to a service packet, where a priority of the measurement message is the same as that of the service packet, and the measurement message includes at least one of the three: a packet loss measurement parameter, a delay measurement parameter, and a jitter measurement parameter; and measuring performance of a service in a tunnel according to a measurement parameter in the measurement message. According to the embodiments of the present application, a problem that performance measurement cannot be performed for different services transmitted in a tunnel in the prior art may be solved.

Techniques for performing efficient topology failure detection in SDN networks are provided. In one embodiment, a computer system (e.g., an SDN controller) can transmit a first message to a first network device, where the first message instructs the first network device to begin sending probe packets to a second network device at a predetermined rate. The computer system can further transmit a second message to the second network device, where the second message instructs the second network device to monitor for the probe packets sent by the first network device and to notify the computer system when one or more of the probe packets are not received by the second network device. If the computer system receives such a notification from the second network device, the computer system can determine that a port, link, or node failure has occurred between the first and second network devices.

Generally described, systems and methods are provided for detecting the impact of network failures. The system collects performance information from a plurality of nodes and links in a network, aggregates the collected performance information across paths in the network, processes the aggregated performance information for detecting failures on the paths, adjusts the set of performance information by removing the performance information for any nodes considered to be associated with performance information that is statistically different from performance information from other nodes at a given location or extrapolates the collected information to other paths, and determines the impact to customers of the network failures detected using the adjusted set of performance information.

Network telephony monitoring systems are provided herein. In one example, a monitoring service is configured to present an interface for a network telephony monitoring system to receive link metrics for media legs of a packet voice call that extends from an originating network over a plurality of transport networks, with each of the media legs spanning between border control nodes of the plurality of transport networks. A leg quality processor is configured to process the link metrics to differentiate quality degradation of the packet voice call among one or more of the media legs.

A non-transitory computer readable medium includes instructions which, when executed by one or more processors cause performance of operations, including: receiving feedback information related to a receipt of packets by a receiving device, the packets being transmitted by a source device, modifying the feedback information to obtain modified information related to the receipt of the packets by the receiving device, and transmitting, to the source device, the modified information related to the receipt of the packets by the receiving device.

A relay device directly connected to end nodes in an in-vehicle network transmits a failure detection packet to each end node. When each end node can receive the failure detection packet, each end node transmits a response to the relay device. When the relay device receives the response, the relay device transmits another failure detection packet. The end node determines that the in-vehicle network is normal when the value of the previous failure detection packet does not match the value of the other failure detection packet, and determines that the in-vehicle network is not normal when the value of the previous failure detection packet matches the value of the other failure detection packet.

Systems and techniques are described which improve performance, reliability, and predictability of networks without having costly hardware upgrades or replacement of existing network equipment. An adaptive communication controller provides WAN performance and utilization measurements to another network node over multiple parallel communication paths across disparate asymmetric networks which vary in behavior frequently over time. An egress processor module receives communication path quality reports and tagged path packet data and generates accurate arrival times, send times, sequence numbers and unutilized byte counts for the tagged packets. A control module generates path quality reports describing performance of the multiple parallel communication paths based on the received information and generates heartbeat packets for transmission on the multiple parallel communication paths if no other tagged data has been received in a predetermined period of time to ensure performance is continually monitored. An ingress processor module transmits the generated path quality reports and heartbeat packets.