Nec Corporation

Nec Engineering, Ltd.

Akitake Mitsuhashi

Tohru Kimura

Hitoshi Yano

Shuji Senda

Koji Fukami

Toshiyasu Nakao

Atsushi Kashitani

Nobuhide Yoshida

Jun Noda

Yuuichi Aoki

Daigo Taguchi

Teruki Sukenari

Kunihiro Suzuki

It is an object to provide a data collection system that is configured to reduce a communication amount, etc. at the time when data are collected from devices, so as to reduce a communication amount attended by the collection of data without increasing processing loads imposed on devices. The data collecting device comprises a code operating means for deriving a frequency of the symbol for each symbol corresponding to the code being contained in the already compressed data based upon the data analysis result being contained in the received already compressed data, and a code operation developing means for adding the frequency of the description format, out of the frequencies obtained by the code operating means, to the frequency of the basic symbol corresponding to the above description format, and adding the frequency of the derivative symbol to the frequency of each basic symbol constituting the derivative symbol.

Data collection system, data collection method and data collection program to reduce the communication time

A communication network of the present invention includes: a plurality of superordinate nodestoforming a cascade type topology; and a plurality of terminal nodesto, connected to at least one superordinate node from among said plurality of superordinate nodes and forming a star type topology with the superordinate node connected.

Communication network, information processor and address assigning method

A difference region extracting sectionextracts differential regions based on screen data of a previous screen stored in transmission screen data storage sectionand a current screen stored in a screen data storage section. A priority determining sectioncalculates change data density indicating a degree of a change of pixel values for every differential region. For example, when a user operates an icon on the screen, the change data density of the differential region corresponding to the icon becomes larger than the change data density of the differential region corresponding to the background portion of a video image. An encoding sectionwrites screen code data of each differential region in a transmission bufferin descending order of the change data density.

Screen data transmitting system, screen data transmitting server, screen data transmitting method and program recording medium

It is an object to provide a data collection system that is configured to reduce a communication amount, etc. at the time when data are collected from a plurality of devices, so as to reduce a communication amount attended by the collection of data without increasing processing loads imposed on devices. A symbol classifying unit of a data relay device classifies received data that have been already compressed. A data recompressing unit replaces codes contained in the classified already compressed data with other codes, so as to recompress the already compressed data. A symbol set clustering unit sends a transfer destination renewal device a communication speed at the time when the recompressed data are transferred to other devices, a processing speed at the recompressing time, etc. The transfer destination renewal device generates transfer destination information on the basis of the communication speed, the processing speed, etc.

Data collection in which data is recompressed without conversion of code into symbol

A network session is established by a session establishment procedure in accordance with whether or not a difference in priority of session establishment exists among a plurality of terminals for which the network session is to be established. Based on reserved connection information registered in a database, a network administration device for establishing a network session among a plurality of terminals uses a first session establishment procedure that treats all of the terminals in the same manner when there is no difference in the priority of session establishment among the plurality of terminals, and uses a second session establishment procedure that inquires and performs other operations in advance as to whether or not to establish a session with high-priority terminals and treats with priority the terminals of high-priority users when there is a difference in the priority of session establishment.

Network session control system

Growing community of inventors

Tokyo, Japan

Akitake Mitsuhashi