Fujitsu Corporation

Jun Kakuta

Takashi Ohno

Ryuichi Matsukura

Satoshi Okuyama

Ai Yano

Toshihiro Azami

Shingo Fujimoto

Masahiko Murakami

Akinori Iwakawa

Shigeki Fukuta

Katsutoshi Yano

Tomoyoshi Takebayashi

Kimikazu Furukawa

Kazuki Matsui

Sumiyo Okada

Nami Nagata

Yasuo Sato

Kenichi Horio

Hiroyasu Sugano

Takeshi Ohtani

Yuki Nishiguchi

Takeshi Sano

Ai Manabe

Hisayuki Morishima

Yuuki Yamamoto

Satoru Watanabe

Takashi Ono

Masahide Noda

Akihiko Obata

Madoka Mitsuoka

Takako Suzuki

Souichi Okada

Tsuneo Katsuyama

Yasuo Satoh

Yuki Yamamoto

Tetsuji Morishita

Yuji Tabuchi

Toshinao Gunchi

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.

Communication apparatus, communication system, and communication control method

A communication control method executed by a processor included in a communication control device that controls communication with a communication device, the method includes, when a communication access to the communication device is detected, specifying a related characteristic corresponding to the communication device by referring to a first memory that stores communication device-related characteristics, determining a security function corresponding to the specified related characteristic by referring to a second memory that stores executable security functions for the communication device-related characteristics, and executing the security function determined at the determining for the communication device of the communication access.

Communication control method and communication control device for substituting security function of communication device

Provided is an abnormality detecting method implemented by a computer, the abnormality detecting method including: acquiring a plurality of pieces of performance information each containing performance of a management target device; determining whether abnormal performance information is included among the plurality of pieces of performance information, in accordance with a condition for determining an abnormality of the performance; when the abnormal performance information is included, identifying a type of a failure corresponding to the abnormal performance information, in accordance with a correspondence relationship that associates respective combinations of a plurality of identifiers indicating the abnormality of the performance with failure types; and deciding a degree of importance of a measure against the failure, in accordance with information related to the identified failure type.

Abnormality detecting method and abnormality detecting device

A communication system includes a first communication apparatus included in an ad hoc network, and a second communication apparatus included in an ad hoc network, the second communication apparatus being coupled to a gateway and being configured to receive data from the first communication apparatus, wherein the first communication apparatus includes a memory, and a processor coupled to the memory and configured to acquire first information regarding communication quality between the first communication and each of a plurality of adjacent nodes in the ad hoc network, determine, based on the first information, a number of the adjacent nodes whose communication quality with the first communication apparatus is equal to or greater than a first value, and control, based on the number, a transmission amount of the data transmitted to the second communication apparatus through the ad hoc network.

Communication system, method and non-transitory computer-readable storage medium

A management device includes a counter that counts the first number of times authentication of a first communication device has been successful, a generating unit that generates a first password based on the first number of times, and a sending unit that sends a registration request that requests registration of the first password. The first communication device includes a counter that counts the second number of times authentication of the first communication device has been successful, a generating unit that generates a second password based on the second number of times, and a sending unit that sends a connection request that includes the second password. A second communication device includes a receiving unit that receives the registration request and the connection request and a determination unit that compares the first password with the second password and determines whether authentication of the first communication device is successful.

Apparatus authentication system, management device, and apparatus authentication method

A control device includes a processor. The processor is configured to obtain measurement data from a plurality of devices and predict prediction data of a specified timing using the obtained measurement data. The processor is configured to calculate, for each device, an error between the measurement data and the prediction data. The processor is configured to, based on the error for each device, assign a notification timing for each of such devices for which there is overlapping of timing of notifying the measurement data of the specified timing.

Control device, control method, and computer-readable recording medium

A communication control apparatus includes: a processor configured to: fix a number of sets of data to be inserted into one packet by a communication apparatus according to a wireless quality with the communication apparatus; and notify the communication apparatus of the number of sets fixed at the fixing.

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

A gateway which is an example of a communication device includes a selecting unit and a management data collecting unit. The selecting unit selects a collection manipulation within a range not exceeding a resource amount allocated to transmission of management data among all resources of wireless communication usable by a device in accordance with an evaluation value. The evaluation value is a value calculated on the basis of a contribution degree to failure analysis and consumption resources for each of a plurality of collection manipulations for collecting management data used for the failure analysis from a device. The management data collecting unit executes the collection manipulation selected by the selecting unit on the device and collects the management data corresponding to the collection manipulation from the device through the wireless communication.

Communication apparatus, data processing system, and communication method

A data acquisition unit repeatedly acquires pieces of notification information for executing predetermined processing from respective BLE devices. A connection controller detects a BLE device, calculates digitalized values of influences of the respective pieces of notification information acquired from the respective BLE devices on the predetermined processing on the basis of the pieces of notification information already acquired by the data acquisition unit, selects a BLE device on the basis of the calculated digitalized values of the influences, and causes the data acquisition unit to stop acquisition of the notification information from the selected BLE device and establishes connection with the BLE device.

Communication control device, communication control system, and communication control method

A radio communication anomaly detecting method includes: gathering and storing different kinds of parameters indicating a radio quality with a sensor node in a storage unit; classifying parameter sets, each containing specific kinds of parameters gathered during a prescribed time period among the stored parameters, into clusters; estimating that a rapid radio quality degradation has occurred during the prescribed time period when there is a cluster of which all average values of specified kinds of parameters among the different kinds of parameters degrade more than those of another cluster; and performing a trend analysis for a time period during which it is not estimated that the rapid radio quality degradation has occurred to determine whether each of the different kinds of parameters gathered during the time period exhibits a trend of degradation, and estimating that a slow radio quality degradation has occurred based on a result of the trend analysis.

Method and device for detecting radio communication anomalies

A communication apparatus going to acquire transmission right accepts input of specifying a communication apparatus as a main target of output among other communication apparatuses, and then performs multi-address calling of output data to the other communication apparatuses. At executing output processing on the basis of the output data, the specified communication apparatus executes output processing such as image output and voice output for notifying the fact of being specified. In a system of PoC service or the like where one communication apparatus among a plurality of communication apparatuses acquires transmission right of transmitting voice data, and then performs multi-address calling of voice data to a plurality of the other communication apparatuses, it is avoided that a target person of speech who is a main target of transmission of voice data among all users operating the other communication apparatuses fails to listen to a speech.

Communication method, communication system, repeating apparatus, communication apparatus, and computer program product

A control device which controls an operation of a controlled device, includes: an operation information storage unit to store operation information about an acceptable operation; a control information acquisition unit to acquire control information about the controlled device; and an association table generation unit to generate an association table for storing the operation information stored in the operation information storage unit associated with the control information acquired by the control information acquisition unit.

Control device, control system and control method

A detected information correction apparatus configured to correct detected information, includes: a usage status detecting configured to detect status information on the basis of detected information detected by one or more sensors, the status information indicating how a portable apparatus is being used; a correction data acquiring configured to acquire correction data at specific timing intervals, the correction data being used to correct the detected information; and a detected information correcting configured to correct the detected information with the correction data.

Detected information correction apparatus and method

An information processing apparatus includes a key information table memory for storing, in a key information table, key information including first identification information identifying a first nearby device communicating with the information processing apparatus, a communication unit for communicating with a second nearby device present at a location where the second nearby device is communicable with the information processing apparatus, a nearby device information retrieval unit for retrieving nearby device information including second identification information identifying the second nearby device, a movement halt detector for detecting a movement status of the information processing apparatus, a functional limitation determiner for determining, based on the key information, the nearby device information, and/or the movement status, whether to limit execution of a process of a function of the information processing apparatus and a functional limitation executer for controlling the execution of the process based on the determination results.

Information processing apparatus, security method, and storage medium storing security program

A server apparatus includes, a transceiver unit to transmit to a communication apparatus a web page having link information to each of a plurality of contents, to transmit to the communication apparatus a content requested by the communication apparatus among the plurality of contents, and to transmit to the communication apparatus navigation information that includes link information to any of the plurality of contents; a storage unit to store identification information for identifying each of the plurality of contents and reference information indicating whether each content corresponding to the identification information is transmitted to the communication apparatus; and a generation unit to generate, on the basis of the reference information, the navigation information which does not include the link information corresponding to the content requested by the communication apparatus from among the plurality of contents.

Growing community of inventors

Kawasaki, Japan

Jun Kakuta