Nec Corporation

Atsushi Kamoi

Koya Takata

Hisashi Mizumoto

Masaki Aizono

A free-space optical communication control system includes at least one processor. The at least one processor carries out: an interruption estimation process of estimating an interruption of free-space optical communication over a free-space optical communication network in accordance with movement route information that indicates a movement route of a mobile object movable within a communication area of the free-space optical communication network; and a path change process of changing a free-space optical communication path in accordance with an estimation result of the interruption estimation process.

Free-space optical communication control system, free-space optical communication control apparatus, and free-space optical communication control method

A communication control system includes at least one processor executing: a main communication process of carrying out communication with one or more targets through an optical fiber line; a specifying process of specifying, from among the one or more targets, a free-space optical communication target based on communication statuses in the main communication process; a sub communication process of carrying out communication with the free-space optical communication target via a free-space optical communication apparatus(es); and a selecting process of selecting, according to at least one of (i) a capacity of the communication with the free-space optical communication target in the main communication process, (ii) the communication statuses of the free-space optical communication apparatuses, and (iii) processing capacities of the free-space optical communication apparatuses, a path for free-space optical communication with the free-space optical communication target in the sub communication process.

Communication control system, communication control apparatus, and communication control method

To provide a free space optical communication apparatus with an increased efficiency of optical axis alignment. A free space optical communication apparatus () includes: light transmitting sections (); and an optical axis alignment section () configured to align an optical axis of each of the light transmitting sections () with a corresponding one of light receiving sections () included in a communication target. The optical axis alignment section () causes at least one of the light transmitting sections () to emit scan light () while varying an emitting direction, and aligns an optical axis of a light transmitting section () which is other than the at least one light transmitting section (), based on an emitting direction of the scan light () emitted from the at least one light transmitting section () and received by a corresponding one of the light receiving sections ().

Free space optical communication apparatus, free space optical communication system, and free space optical communication method

A free-space optical communication control system includes at least one processor. The at least one processor carries out: a first detection process of detecting a change in a connection relationship between a first free-space optical communication apparatus and a second free-space optical communication apparatus adjacent to the first free-space optical communication apparatus; a second detection process of detecting a transition of work stages in accordance with the change in the connection relationship detected and plan information indicating a connection relationship between the first free-space optical communication apparatus and the second free-space optical communication apparatus in each of the work stages; and a connection control process of controlling, according to the transition of the work stages detected, which connection destination is connected to the first free-space optical communication apparatus.

A management system for managing an upper free-space optical communication apparatus and a lower free-space optical communication apparatus that carry out free-space optical communication in an up-and-down direction is provided, the management system including at least one processor, the at least one processor carrying out: an acquisition process of acquiring a first index that indicates a quality of a first upward light signal received by the upper free-space optical communication apparatus; and a determination process of determining a possibility of contamination of a light sending and receiving window of the lower free-space optical communication apparatus in accordance with the first index, the lower free-space optical communication apparatus being configured to send and receive a light signal of the free-space optical communication through the light sending and receiving window.

Management system, management apparatus, and management method

A free space optical communication device includes: a plurality of light transmitting/receiving sections; and at least one processor configured to execute: a communication control process of controlling communication which is to be carried out via the plurality of light transmitting/receiving sections, in the communication control process, the at least one processor (a) determining a required communication capacity for the communication and (b) controlling, on the basis of the required communication capacity, the number of light transmitting/receiving sections to be used for the communication.

Free space optical communication device, free space optical communication system, and free space optical communication method

The present invention provides a pipeline management supporting server capable of unifying management of attribute data of a pipe component and location information on a pipe network, efficiently detecting an abnormality of a pipeline remotely, and diagnosing the degradation state of the pipeline. The pipeline management supporting server () of the present invention includes: a private data processing unit () and a statistical calculation processing unit (). The private data processing unit () includes an event data acquisition section () that acquires event data of a pipeline measured by a sensor(s), a measured event data storage section () that stores the event data of the pipeline, a pipeline database data storage section () that stores pipeline database data, a possible abnormality detection section (), and an information output section (). The possible abnormality detection section () identifies a pipeline and a location pertaining to the acquired event data of the pipeline with reference to the pipeline database data stored in the pipeline database data storage section () and generates possible abnormality detection information on the acquired event data of the pipeline. The statistical calculation processing unit () includes a data analysis section () and a statistical calculation data storage section () that stores statistical calculation data. The data analysis section () prepares, from event data of plural pipelines each having the same attribute as the pipeline pertaining to the event data acquired by the private data processing unit (), an aging characteristic graph of the plural pipelines. The statistical calculation data storage section () stores the aging characteristic graph prepared by the data analysis section (). The data analysis section () further generates degradation state diagnostic information on the pipeline by checking the pipeline pertaining to the event data acquired by the private data processing unit () against the aging characteristic graph. The information output section () of the private processing unit () outputs the degradation state diagnostic information and abnormality determination result detection information that is generated by examining the possible abnormality detection information and the degradation state diagnostic information in comparison.

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Tokyo, Japan

Atsushi Kamoi