Nippon Telegraph and Telephone Corporation

Naoyuki Tanji

Toshihiko Seki

Mizuto Nakamura

Atsushi Takada

Kyoko Yamagoe

Hiroshi Kato

Hiroyuki Tanaka

Kensuke Takahashi

Nobuo Onai

Naoki Take

Hiroyuki Yazaki

Chihiro Maru

To make it possible to correctly understand a connection relationship of interfaces. A traffic addition deviceadds to traffic volumes output from a plurality of interfaces of a plurality of network devices A to F in a to-be-estimated network N additional traffic volumes different at the interfaces. This forms a characteristic volume in the traffic volumes. The topology estimation devicecan thus correctly understand a connection relationship of the interfaces from a correlation between the traffic volumes.

Topology deduction system, traffic addition device, and traffic addition method

A topology estimation system that estimates the connection relationship of interfaces of a plurality of devices includes: a topology estimation devicethat estimates the connection relationship of the interfaces from the correlation of traffic observed at each of the interfaces connected to each other; and a traffic generation devicethat generates traffic to be transmitted to the interfaces. The traffic generation deviceincludes: a traffic generation unitthat generates traffic so that a different feature amount appears for each set of the interfaces connected to each other; and a traffic transmitting unitthat transmits the traffic to the interfaces.

Topology estimation system, traffic generation apparatus, and traffic generation method

An integrated processing resume device includes: a request receive part configured to allow an input of a request for an integrated order, the request for an integrated order being a request for integrating a plurality of wholesale services; a resource management part configured to record whether or not each of individual instructions of the wholesale service called by an execution of the integrated order has been successfully executed; and an order resume part configured to, when an individual instruction has not been successfully executed and the integrated order is thereby suspended, then, at a time of resuming the integrated order, reference whether or not an already-having-been-executed individual instruction has been successfully executed, from the resource management part, and, while skipping re-execution of a having-been-successfully-executed individual instruction, execute a not-having-been-successfully-executed individual instruction or a not-yet-having-been-executed individual instruction.

Coordination process restart device and coordination process restart method

Provided are a disposition rule saving unit that saves a disposition rule indicating at least a login method and disposition corresponding to the login method of an agent, a control rule saving unit that saves a control rule indicating at least an OS type and control information corresponding to the OS type of a target device of a network service, a data extraction unit that extracts configuration information including a login method and the OS type of the target device of the network service from a response result of construction processing, an agent disposition unit that determines disposition of an agent based on the login method of the extracted configuration information and the disposition rule, and an agent disposition unit that determines control processing of the agent based on the OS type of the extracted configuration information and the control rule.

Network system, information acquisition device, information acquisition method, and program

In a case where an active system virtual server detects stopping of a heartbeat received from a standby system virtual server, the active system virtual server notifies a coordination apparatus of the detection of the stopping of a heartbeat. In addition, the active system virtual server reports whether or not a service is operating to the coordination apparatus. The coordination apparatus instructs the standby system virtual server to restart the system in a case where the stopping of a heartbeat and the operation of a service are received. The standby system virtual server restarts the service, restarts an operating system, or restarts the operating system in a case where the restart of the service is not successful, in response to an instruction for restarting the system.

Service continuation system and service continuation method between active and standby virtual servers

A system determination apparatus includes: a calculation unit configured to calculate a variation coefficient representing a degree of variation of traffic and an average traffic amount corresponding to a plurality of days using traffic data of a network apparatus corresponding to the plurality of days; and a determination unit configured to determine a system of the network apparatus using a density of a data group representing a relationship between the variation coefficient and the average traffic amount corresponding to the plurality of days, and the determination unit determines the network apparatus to be a non-operation system in a case where a density of the data group is equal to or higher than a first threshold and determines the network apparatus to be an operation system in a case where the density of the data group is lower than the first threshold.

System determination apparatus, system determination method and system determination program

In an estimation systemincluding an addition deviceand an estimation devicethe addition deviceincludes a storage sectionwhich stores address information of each interface of one of at least two network devices connected to each other, and a transmission sectionwhich transmits, at different times, a PING packet which is output to the other network device and is then returned to the one of the network devices to each interface of the one of the network devices by using the address information of the interface read from the storage section, and the estimation deviceincludes an estimation sectionwhich compares, for each time, time-series data of a data amount of each interface of the one of the network devices which includes a data amount of the PING packet and time-series data of a data amount of each interface of the other network device which includes the data amount of the PING packet, and calculates a combination of the interfaces of which the data amounts at each time match each other.

Estimation system, addition apparatus, estimation method, addition method, estimation program and addition program

A time stamp correction apparatus that corrects a deviation between time stamps of pieces of data acquired by physically connected NW apparatuses by correcting a deviation in a time stamp between pieces of traffic data is provided. The time stamp correction apparatus includes a waveform similarity computation unit that determines an IF pair based on a similarity between waveforms of time-series data of traffic observed in respective interfaces of the NW apparatuses, and a time stamp correction unit that generates correction information for correcting a deviation between the time stamps of the pieces of data based on feature points of time-series data of traffic observed in the IF pair.

Timestamp correction apparatus, time stamp correction method, and program

A traffic application amount calculation deviceincludes a calculation unitthat uses traffic data flowing to an IF of a NW device to calculate, in the IF, an average traffic amount in a transmission direction and an average traffic amount in a reception direction, a first arithmetic operation unitthat selects a direction in which an average traffic amount is smaller out of the transmission direction and the reception direction and calculates a standard deviation of the traffic amount in a selected direction that is selected, and a second arithmetic operation unitthat determines a traffic amount obtained by multiplying the standard deviation by a predetermined value as a traffic application amount to be applied to traffic in the selected direction.

Traffic application amount calculation apparatus, method and program

To reproduce and measure a network load that occurs suddenly. A quality measurement deviceincludes a load analysis unitwhich analyzes a load of a measurement target network, a reference load acquisition unitwhich acquires reference load dataincluding a load of a reference network, a test condition determination unitwhich determines, based on a load at a reference point of the reference network, a load to be added to a measurement point of the measurement target networkcorresponding to the reference point, and a test traffic generation unitwhich gives traffic corresponding to the load that is determined to the measurement point.

Quality measuring device, quality measuring method, and quality measuring program

A service quality control device includes: an APL profilethat records the profile of an application; an APL determination unitthat acquires network performance including throughput and network information including quality of user's experience from a network device constituting the networkand determines the application to be used by a user by comparing the acquired network information with the APL profile; a causal model generation unitthat acquires network setting information including a bandwidth throttling value from the network device, generates a causal model that associates network setting information with network performance for each application, and generates a causal model that associates network performance with quality of user's experience for each application; and an optimization unitthat finds a network setting that maximizes the network performance and the quality of user's experience of a plurality of applications on the basis of the causal model.

Service quality control device, method, and program

A network information collection device is provided, which connects, for example, artificial intelligence with each of a plurality of systems in one-to-one relationships. It includes an information collection and accumulation unitwhich collects and accumulates information from each of management systemstofor managing a plurality of devices constituting a network, a related information generation unitwhich generates related information by associating connection relationships of the plurality of devices managed by the management systemstowith the information, and a delivery unitwhich delivers the related information to the outside with a specified granularity, the related information generation unitincludes a log aggregation unitwhich records changes in a state of each of the plurality of devices, an inter-layer association unitwhich associates the inter-layer connection relationships of the devices with the information, and a chronological arrangement unitwhich chronologically arranges the changes in the states recorded in the log aggregation unitand the information.

Network information collection device and method therefor

[Problem] It is determined whether quick repair handling is required for a failure in a communication apparatus or in a communication service that occurs in a nighttime period in compliance with an SLA while curbing operating expenses. [Solution] A maintenance task management apparatusdetermines handling of failures when both an apparatus failure that is a failure in communication apparatusesandin a nighttime period and a service failure that is a trouble in a communication service provided by the communication apparatusesandto users in the nighttime period occur or only the apparatus failure occurs. The maintenance task management apparatusincludes a handling determination unitand a handling control unit. The handling determination unitdetermines whether service interruption of communication due to double failures, which are both the apparatus failure and the service failure, violates an SLA that is service level agreement with users when the double failures are detected. The handling control unitperforms control for transmitting a quick handling notification for requesting quick failure repair to a worker terminalwhen it is determined that the service interruption violates the SLA.

Maintenance task management device and maintenance task management method

[Subject] Development costs of operation automation are reduced. [Solution] An operation apparatus () includes a message storage unit () configured to store messages to be exchanged between a plurality of types of operational components, the operational components obtained by converting an operational process executed as the operation into components, a firing rule storage unit () storing rules to be applied to each of the operational components, an action storage unit () storing actions indicating operation content of each of the operational components, a rule execution unit () configured to refer to the message storage unit () and the firing rule storage unit () and, when there is a firing rule, execute, for each of the operational components, a process of selecting the action corresponding to the firing rule from the action storage unit, an action execution unit () configured to execute the selected action for each of the operational components, and a transmission message processing unit () configured to execute, for each of the operational components, a process of creating a message addressed to the other operational components on the basis of an execution result of the executed action.

Operation device and operation method

An analysis device for analyzing services on a network includes: a storage unit configured to store, maintenance information collected, from the network, at a predetermined time interval and for each of the services, application rules describing a technique for applying a plurality of types of analysis logics classified by use, and a catalog describing specifications of the analysis logics; a rule application unit configured to, upon receipt of a request related to an analysis target service, apply the maintenance information over a predetermined period of the analysis target service to the application rules; an analysis logic selection unit configured to select the analysis logics for each use based on a result of the application to the application rules; and a collaborative catalog generation unit configured to generate a collaborative catalog including a combination of the catalogs describing the specifications of the selected analysis logics.

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Tokyo, Japan

Naoyuki Tanji