Fuji Xerox Co., Ltd.

Fuji Xerox Corporation

Yasutoshi Maeda

Katsuya Mitsutake

Takanori Hisanaga

Yuji Kozawa

Nobuo Iwata

Koh Kamizawa

Koichi Yoshimura

Kohshiro Inomata

Fumiyoshi Kawase

Junichi Okuyama

Ichiro Yamashita

Takahiko Hayano

An information processing apparatus includes: a user determination unit that determines whether or not plural user devices are used by a single user on the basis of information transmitted from the plural user devices; a storage unit that stores information of the plural user devices determined to be used by the single user as a set of user devices; a selection unit that selects a second user device to which a service is to be provided in the case where a first user device that requests the service and the second user device are both included in the same set of user devices; and a transmitting unit that transmits service information to the first and the second user device.

Transmitting service information to a plurality of user devices used by a single user

Transmitting service information to a plurality of user device used by a single user

An encryption/decryption system capable of supplying data only to a user making a request. A computer encrypts data with a common key, encrypts the common key with a public key, and transmits the encrypted data and the encrypted common key. A copy machine receives these data, encrypts challenge data with the public key, and transmits the encrypted challenge data to an IC card. The IC card decrypts the encrypted challenge data with a private key, and feeds the decrypted challenge data back to the copy machine. The copy machine transmits the IC card an encrypted common key of reception data offering decrypted challenge data identical to the original challenge data. The IC card decrypts the encrypted common key and feeds the decrypted common key back to the complex copy machine. The complex copy machine decrypts the encrypted data with the common key.

Encryption/decryption system and method for the same

A device retrieval system in a network system including a plurality of devices each having at least one attribute. The retrieval system includes: a plurality of device registration units, a device retrieval unit and an identity judgment unit. The device registration unit registers at least a part of the devices and attributes thereof while associating the devices with the attributes respectively. The device retrieval unit retrieves devices and attributes thereof from the devices and the attributes registered in the device registration units. The identity judgment unit judges identity as to whether a device retrieved from one of the device registration units is identical to a device retrieved from one of the others of the device registration units, based on common points of attributes of the retrieved devices.

Device retrieval system on the basis of device attributes and method thereof

Print control program, by its constituent portions in cooperation with a scanner apparatus, spools image data sent from the scanner apparatus and controls the print engine etc. of the printer apparatus to print out the spooled image data. The print control program prepares job attribute information used for obtaining the output rate of the printer apparatus, calculates an anticipatory spool amount based on the job attribute information of the printer apparatus thus prepared and job attribute information received from the scanner apparatus, and adjusts timing for printing out the spooled image data.

Image forming system and image forming method

A data transmission control information acquisition section generates data transmission control information based on control information exchanged between applications of a data transmitter and a data receiver before data transmission is started. A data transfer control section determines a bandwidth to be used by the data transmission, transmission start time, etc. in a shared transmission medium in a unified manner based on the data transmission control information and current bandwidth use conditions, and transmits the thus-determined information to the data transmitter. The data transmitter transmits data to the data receiver via the transmission medium under unified management.

Method and system for data transmission accordance with the form of the data transmission based on control information exchanged between applications of a data transmitter and a data receiver before data transmission is started

A data transmission apparatus having a storage device for storing at least one structure data piece of a data processing device in a receiving data processing apparatus, a computation device for computing a transmission error detection code from the structure data stored in the storage device and a device for attaching the transmission error detection code computed by the computation device to the structure data stored in the storage device. The data transmission apparatus further includes a transmitter for transmitting the structure data to which the transmission error detection code is attached to a receiving apparatus, a receiver for receiving a retransmission request for each structure data piece returned from the receiving apparatus when a transmission error is detected based on the transmission error detection code and structure data transmitted by the transmitter, and a device for responding to the restransmission request for each structure data piece received by the reception means by retransmitting the corresponding structure data piece to the receiving apparatus.

Data transmission apparatus and method

A data transmission apparatus in which the bandwidth necessary for an application is determined and is communicated to a transmission interval counting function. The transmission interval counting function determines a transmission interval according to the necessary bandwidth and effects transmit control on a transmission unit transmitting function with timing set at this transmission interval so as to transfer data in a desired bandwidth. Owing to the above construction, even when a plurality of types of applications for transmitting data at desired times exist and they perform data transmissions while sharing the use of a network, the contention between the data transmissions in the network can be prevented from occurring. This prevents data losses and delays in data transmission from increasing.

Data transmission apparatus for controlling contention between data

The present invention provides a data transmission system having a data sending unit, a data receiving unit and a data transmission medium for data transmission from the data sending unit to the data receiving unit, which comprises an element for generating feature information of data transmission from the data sending unit to the data receiving unit in advance of execution of the data transmission, an element for storing change of states of use of a bandwidth by data transmission now under execution, an element for predicting a time of completion of the data transmission now under execution based on the change of states of use of the bandwidth and the feature information of the data transmission now under execution, an element for determining a transmission rate for data transmission to be next executed at the time of completion of the data transmission now under execution based on the change of states of use of the bandwidth and the feature information of the data transmission to be next executed, and an element for executing the data transmission to be next executed from the data sending unit according to the transmission rate at the time of completion of the data transmission now under execution.

Growing community of inventors

Kanagawa, Japan

Yasutoshi Maeda