Generally described, systems and methods are provided for monitoring and detecting causes of failures of network paths. 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, analyzes each of the detected failures to determine at least one root cause, and initiates a remedial workflow for the at least one root cause determined. In some aspects, processing the aggregated information may include performing a statistical regression analysis or otherwise solving a set of equations for the performance indications on each of a plurality of paths. In another aspect, the system may also include an interface which makes available for display one or more of the network topology, the collected and aggregated performance information, and indications of the detected failures in the topology.

This disclosure provides a measurement method and an acquisition method for a packet loss rate, a terminal, and a network device. The measurement method for a packet loss rate is applicable to a terminal, and comprises: acquiring configuration information concerning an uplink packet loss rate measurement, the configuration information comprising: measurement time window information, measured service information and condition information for triggering uplink packet loss rate measurement reporting; measuring, according to the configuration information, an uplink packet loss rate; and sending report information to a network device according to the uplink packet loss rate.

The disclosed scoring uses a “dynamic packet loss threshold” that is based on benchmarks of “good” packet loss behavior of network paths associated with circuits of different bandwidths and recent behavior of the path being scored. The observations for good packet loss behavior are bucketized by corresponding circuit load. For the path being scored, observations are also bucketized and aggregated into a moving average per load bucket. The moving averages represent recent behavior of the path by load bucket. The scoring system scores a path as a function of the current time interval packet loss of the network path being scored and the dynamic packet loss threshold of the current time interval. The dynamic packet loss threshold of the current time interval is a function of a good packet loss benchmark and the packet loss moving average for the load of the current time interval.

A method for measuring the propagation time of data routing information in a data communication system including a data communication network which comprises a plurality of router nodes operating according to a routing protocol for routing data packets between nodes of the data communication network is disclosed. The method includes, at a router node referred to as the generator node: generating timestamp data for the transmission of data routing information; inserting the transmission timestamp data into a field of a routing protocol message carrying the data routing information, the field being intended to receive data relating to data routing; and sending the message to a different router node referred to as the receiver node.

A communication apparatus that transmits and receives packet data by radio communication with another communication apparatus, the communication apparatus including a memory; and a processor coupled to the memory and the processor configured to: receive first packet data in a first packet transmission period; calculate data collection efficiency indicating a ratio of a reception data amount of the first packet data, to a transmission data amount of the first packet data, based on received the first packet data, and measure a first radio quality in a radio section between the communication apparatus and the other communication apparatus, based on received the first packet data; calculate a packet length and transmission count of the first packet data, based on the data collection efficiency and first radio quality; and transmit a second packet data including the packet length and transmission count.

A Time-To-Live budget can be determined for network packets and used to understand an impact of network expansion on dropped packets. Additionally, the TTL budget can be used to determine how network expansion impacts services provided in the data center. In one embodiment, agents executing on data center routers are used to transmit packet header data including a TTL budget to a collector server computer. The collector server computer can discern signal (production flows) from noise (traceroutes and probing traffic) to detect packets that are at risk of being dropped or have been dropped due to TTL expiration. Alerts can be generated for packet flows with dangerously low remaining TTL budget or no remaining budget, which are at high risk of expiring due to operational events resulting in traffic temporarily traversing slightly longer paths. A dashboard can be provided with historic TTL budget data and trends.

A traffic-aware switch-shared cache scheduling method includes: S1, setting a cache threshold of each outgoing port of a switch according to a traffic state of each outgoing port of the switch; S2, monitoring each outgoing port of the switch to determine whether an event of packet entry queue, packet exit queue, packet loss, buffer overflow or port queue state change occurs; S3, determining a traffic state of the outgoing port according to the event that occurs at the outgoing port and corresponding port queue state information; S4, setting a port control state according to the traffic state of the outgoing port; and S5, adjusting the cache threshold corresponding to the outgoing port according to the port control state, and performing S2 to continue monitoring until the switch stops working.

A method is disclosed for distributed routing data with latencies using relay nodes. The method includes automatically measuring one-way latencies between a plurality of nodes comprising a first node, a second node, and a relay node, producing a first signal associated with a proof of uptime for the relay node, producing a second signal associated with a proof of bandwidth for the relay node, after the proof of uptime and the proof of bandwidth of the relay node are validated, automatically identifying a relayed data routing path from the first node to the second node via the relay node based on the one-way latencies between the plurality of nodes, in response to a command to transfer data from the first node to the second node, and transferring data from the first node to the second node along the relayed data routing path.

A method is disclosed for autonomously discovering and utilizing low-latency routing paths in a distributed data routing network. The method includes automatically measuring one-way latencies between a plurality of nodes, and automatically calculating relay health scores of potential relayed data routing paths in the distributed network. A relayed data routing path is automatically selected based on the one-way latencies and relay health scores of potential relayed data routing paths. A relay health score for a potential relayed data routing path is based on uptimes of the potential relay node, or bandwidths, jitters, data package losses, or amount of data routed through the routing segments in the potential relayed data routing path. The selected relayed routing path has a routing health score that meets a pre-determined criterion. The selected relayed data routing path has a total one-way latency smaller than a one-way latency associated with in a direct path.

A network quality measurement method includes obtaining feature parameter of a to-be-measured data packet set, where the to-be-measured data packet set is in a packet flow and is based on an encrypted transmission protocol, the to-be-measured data packet set includes at least two to-be-measured data packets, and the feature parameter are parameter read from headers of the to-be-measured data packets based on the encrypted transmission protocol, determining a data transmission mode of the to-be-measured data packet set based on the feature parameter of the to-be-measured data packet set, determining, based on the data transmission mode, a measurement index of network quality measurement, and performing, based on the measurement index, the network quality measurement on the to-be-measured data packets corresponding to the feature parameter.