Boots – shoes – and leggings
Patent
1992-05-28
1997-01-07
Lee, Thomas C.
Boots, shoes, and leggings
39520016, 395853, 395872, 3642288, 364230, 364DIG1, G06F 1300, G06F 1314
Patent
active
055926240
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention generally relates to message control systems for data communication systems, and more particularly, to a system for controlling messages among a plurality of processing modules which form a loosely coupled multiprocessing (LCMP) system.
In data communication systems, one of the most important factors is to realize a reliable system having a large processing capability. In order to satisfy this demand, multiprocessor systems are being used. One system configuration of the multiprocessor system is the loosely coupled multiprocessing (LCMP) system in which a plurality of independent computers are coupled by channel-to-channel adapters, and the like, to enable a job input and execution by any of the computers.
When implementing message communication in the loosely coupled multiprocessing system, it is necessary to realize a message communication system which is transmitting side initiated, and can appropriately cope with the various control end requests issued during the communication by the data processing function. In addition, it is necessary to realize a message control system which can simply set and release logical connections.
BACKGROUND ART
Data communication systems having a microprocessor structure, with a tightly coupled multiprocessing (TCMP) system having a system configuration in which a plurality of microprocessors share a single memory device have been widely used. However, the loosely coupled multiprocessing system in which each processor has its own memory device is more popularly used in order to improve the system performance when increasing the number of processor modules.
In a loosely coupled multiprocessing system, general purpose buffers, having the same construction, are used for the buffers on the transmitting side and the receiving side as message storage regions, and the message transfer is made between these general purpose buffers.
However, when making message communication using such general purpose buffers, the message which is the subject of the communication cannot be stored in the general purpose buffer if the size of this message is large, and for this reason, it is necessary to communicate the message in divisions.
When executing the message communication according to this method, the message which is the subject of the transmission must, at the transmitting side processing module, be expanded to the general purpose buffer from the original memory position. In addition, at the receiving side processing module, it is necessary to expand the message which is received at the general purpose buffer to the requested memory position. For this reason, it takes too much time for the message transmission and reception process if the size of the message is large.
Therefore, a conventional message control system for the loosely coupled multiprocessing system has a problem in that it is impossible to promptly execute data processing which requires large messages to be transmitted and received.
The present invention takes the above noted problems into consideration, and has as an object to provide a message control system for a data communication system employing loosely coupled processing modules, which eliminates the above noted problems by making it possible to execute message communication without requiring the structures of the transmitting and receiving buffers to match.
DISCLOSURE OF THE INVENTION
In order to achieve the above object, the present invention provides a message control system for a data communication system, which employs a loosely coupled multiprocessing system structure, in which a plurality of processing modules having a central processing unit, a memory unit and a connection unit are connected to each other via a system bus. The memory unit of each processing module includes a data processing part which is software running on the central processing unit, a descriptor which manages address and processing unit, a descriptor which manages address and data length information of a message storage region in the form of a ch
REFERENCES:
patent: 4449182 (1984-05-01), Rubinson et al.
patent: 4601586 (1986-07-01), Bahr et al.
patent: 4704717 (1987-11-01), King, Jr.
patent: 4851988 (1989-07-01), Trottier et al.
patent: 4866664 (1989-09-01), Burkhardt, Jr. et al.
patent: 5047917 (1991-09-01), Athas et al.
patent: 5142683 (1992-08-01), Burkhardt, Jr. et al.
patent: 5212778 (1993-05-01), Dally et al.
Kabemoto Akira
Sugahara Hirohide
Takahashi Hajime
Fujitsu Limited
Lee Thomas C.
Luu Le Hien
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