Hitachi, Ltd.

Hitachi Microcomputer System, Ltd.

Masao Sueki

Koichi Homma

Matsuaki Terada

Hiroshi Wataya

Keiji Oshima

Takashi Kasama

Satoru Takagi

Toshiya Kagawa

Data communication method and system for transmitting a large amount of data via a network such as LAN to which a plurality of stations or terminals are connected, through a simplified processing procedure with high reliability and high efficiency while suppressing influence to other communications. The large amount of data is transmitted from a sender station to a plurality of receiver stations by utilizing a connectionless communication service, while inter-station reception acknowledging/retransmitting processings are performed by using a connection-oriented communication service. The large amount of data to be transmitted is divided into a plurality of blocks, and inter-block delay time is set on the basis of station status factors such as a permissible load increase rate of the CPU of the individual stations.

System for sending frames from sender to receiver using connectionless

A resource management system and method in a distributed processing system in which a plurality of computers are interconnected through a transmission line. A computer makes, upon accessing to a resource of another computer, inquiries about 'Whether the intended resource exists' and 'Ordering that if the intended resource exists, the interrogated computer should return a response indicative of attribute information of that resource' by using a so-called broadcasting function to simultaneously apprize all the computers constituting the distributed processing system of the same message.

System for locating resources resided in a distributing processing

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Hitachi, Japan

Masao Sueki