Kabushiki Kaisha Toshiba

Nissan Motor Company Limited

Hoya Corporation

Hiroshi Kawazoe

Daisuke Ajitomi

Keisuke Minami

Hiroyuki Aizu

Masayasu Shimakage

On Sadano

Shinya Murai

Masataka Goto

Xuelu Zou

Takuya Kawamura

Kensaku Yamaguchi

Kazutaka Hayashi

Hiroaki Yanagita

Hiromasa Tawarayama

Yasuyuki Nishibayashi

Masahiro Orita

Satoshi Kobayashi

Shingo Tanaka

Shunichi Gondo

Mika Minematsu

Yuki Tani

Naoki Esaka

Hiroshi Mouri

Shogo Yamaguchi

Shigeki Satoh

Shigeki Sato

Koji Tazoe

Shigeki Satou

Misaki Hatsuda

Morihiro Niimi

According to an embodiment, a server apparatus includes a first reception unit, a second reception unit, a classification unit, a second criterion selection unit, a group determination unit, and an individual determination unit. The second criterion selection unit selects, for each group and as a second criterion, a first criterion that is most likely to satisfy from among first criteria that are associated with pieces of identification information of first client apparatuses included in the group. The group determination unit determines whether first acquired data satisfies a second criterion for the group including a first client apparatus that has transmitted the first acquired data. The individual determination unit performs an individual determination process that determines whether the first acquired data satisfying the second criterion satisfies the first criterion associated with the identification information of the first client apparatus that has transmitted the first acquired data satisfying the second criterion.

Server apparatus, information processing method, and computer program product

According to one embodiment, a connection control device includes a request acceptor to accept a connection destination determination request transmitted from a first communication device; and a determiner to determine a server being a connection destination of the first communication device from among a plurality of servers. At least one first server among the servers is scheduled to stop running at a first time point. The determiner determines the connection destination of the first communication device in accordance with a number of communication devices connected to each of the servers, based on history information on connection durations by the first communication device with the servers or history information on connection durations by communication devices with the first server, so that a number of the communication devices connected to the first server before the first time point arrives is suppressed.

Connection control device, connection control system, and non-transitory computer readable medium

According to one embodiment, a communication device capable of communicating with each of a control device and a processing device through a network includes processing circuitry. The processing circuitry creates a job upon receiving a first request from the control device, the first request designating a content of a process that is executed by the processing device, the job containing information to instruct the processing device to execute the process and a first time limit relevant to the process. The processing circuitry controls transition among a plurality of states of the job. The processing circuitry controls, upon receiving a second request for the job from the processing device or the control device, execution of the second request, based on the first time limit and the state of the job.

Communication device, communication system, communication method and non-transitory computer readable medium

A communication device according to an embodiment performs communications with one or more devices via a relay server. To switch a connection destination from a first relay server serving as an origin to a second relay server serving as a destination, the communication device establishes a connection with the second relay server, switches a transmission destination of a message from the first relay server to the second relay server, and cuts a connection with the first relay server.

Communication device, communication system, and computer program product for performing interactive communication via relay servers

A communication device includes a computer including a processor. The computer controls the communication device to perform operations. The operations include establishing a first connection with a first external device and establishing a second connection with a second external device, via a communication network. The operations include transmitting a keep-alive packet to the first external device via the first connection at a first transmission cycle and receiving a response packet for the keep-alive packet. The operations include determining the first transmission cycle according to transmission cycle determination processing which transmits a measurement packet to the first external device via the first connection at a candidate time interval after the second connection is established or after another measurement packet is received via the second connection, and confirming whether the measurement packet transferred by the first external device to the second external device is received via the second connection.

Communication device, server device, communication method, and non-transitory computer readable medium

According to an embodiment, a communication device performs communication with a terminal device via a network and includes first and second connection maintaining units and a switch instructing unit. The first connection maintaining unit maintains a connection established with the terminal device and mediates communication between the terminal device and another terminal device. The second connection maintaining unit maintains a communicable state of the terminal device with the communication device according to a method different from a method implemented by the first connection maintaining unit. When a predetermined switching condition is satisfied, the switch instructing unit instructs the terminal device to switch a method for maintaining a communicable state either from a first method, which is a method implemented by the first connection maintaining unit, to a second method, which is a method implemented by the second connection maintaining unit, or from the second method to the first method.

Communication device, terminal device, and computer program product

According to one embodiment, a communication apparatus communicates with a first device including a first data file via a network. The communication apparatus includes an indication unit and a request sending unit. The indication unit indicates a first data sending request to send first data from a first position as a start position of the first data file toward a second position as an end position of the first data file. Furthermore, the indication unit indicates a second data sending request to send second data from the second position toward the first position in the first data file. The request sending unit sends the first data sending request and the second data sending request to the first device.

Apparatus for efficient reconstruction of data file

In general, according to one embodiment, a communication device conducts connection type data communications. The device includes an application configured to supply or request data by using a connection. The device also includes a termination unit that receives a request of terminating the data communications, and reports, to the application, termination of the connection without terminating the connection.

Communication device and communication method

According to an embodiment, a connection management device is in a communication system in which relay devices are provided for relaying communication between two terminal devices associated with each other in advance. The connection management device determines the relay device with which each terminal device should establish connection. The connection management device includes a storage, an update unit, a request reception unit, and a determination unit. The storage stores state information including a loaded condition and/or terminal connection number for each relay device. The update unit updates the storage in accordance with a predetermined rule. The request reception unit receives, from any one of the terminal devices, a determination request of the relay device with which the terminal device should establish connection. The determination unit determines the relay device with which the terminal device making the determination request should establish connection, based on the state information stored in the storage.

Connection management device, communication system, connection management method, and computer program product

According to an embodiment, a communication device includes a connection establishment unit, a forwarder, and a generator. The connection establishment unit is configured to receive, from a terminal device, a connection request containing identification information of the terminal device, establish a communication connection with the terminal device, and store the identification information and terminal connection information. The forwarder is configured to receive, from a first terminal device, a message to be transmitted from the first terminal device to a second terminal device, and forward the message to the second terminal device, based on forwarding information containing the terminal connection information corresponding to the identification information of the first terminal device, and the terminal connection information corresponding to the identification information of the second terminal device. The generator is configured to generate the forwarding information, based on a request from the forwarder or the connection establishment unit.

Communication device, communication system, communication method and computer program product

According to one embodiment, a server includes a transmitter, a storage, a determination unit and a controller. The transmitter is configured to transmit data using TCP streams. The storage is configured to store a number of TCP streams which the transmitter used in transmitting the data and a maximum value of a bandwidth which the transmitter used in transmitting the data using the number of TCP streams, in association with each other. The determination unit is configured to determine a number of TCP streams, which the transmitter uses in transmitting new data, based on the stored number, the stored maximum value, and a target value of the bandwidth. The controller is configured to update the stored maximum value when a bandwidth used for transmitting the new data using the determined number is larger than the maximum value associated with the stored number which is identical to the determined number.

Remote monitoring system with improved bandwidth

According to one embodiment, a server device includes a receiver, an acquisition unit, a difference extracting unit, an estimation unit, a determination unit, a compression unit, and a transmitter. The receiver receives manipulation information from a client device. The acquisition unit acquires a display image on which the manipulation information is reflected. The difference extracting unit extracts a region where pixel information on an image transmitted to the client device is not matched with pixel information on the display image. The estimation unit estimates an elapsed time since the manipulation information is received until the display image is acquired. The determination unit determines image quality, for which a response time is a predetermined value or less, on the basis of the elapsed time. The compression unit generates a compression image in which the image in the region is compressed with the determined image quality. The transmitter transmits the compression image.

Server device, communication method, and program product for processing the transfer of screen changes

There is provided a server in which a screen update generating unit generates screen update information representing an image of an update area in a screen; a distributing unit distributes the screen update information to a transmitting unit selected from first to N-th transmitting units; a storage stores a generation history of the screen update information; and a precedence possibility determining unit specifies, based on the generation history of the screen update information, screen update information X and Y such that the screen update information X is more previously generated than the screen update information Y and that the image of the screen update information Y is permitted to be displayed prior to the screen update information X, wherein the distributing unit distributes the screen update information Y to the transmitting unit different from that of distributing the screen update information X.

Server, screen transfer system, and screen transfer method

According to one embodiment, a server device connected to a client device by way of a network includes a receiving unit, a first detecting unit, a cycle changing unit, a second detecting unit, and a transmitting unit. The receiving unit receives operation data through the network. The first detecting unit detects, from among operation events based on the received operation data, a specific operation event. The cycle changing unit, when the specific operation event is detected, changes a change detection cycle for screen data that is updated in an application in accordance with the specific operation event from a first cycle to a second cycle that is longer than the first cycle. The second detecting unit detects a change in the screen data in the second cycle. The transmitting unit transmits the screen data, in which the change is detected, to the client device.

Growing community of inventors

Kawasaki, Japan

Hiroshi Kawazoe