The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 12, 1996
Filed:
May. 01, 1992
Hitachi, Ltd., Tokyo, JP;
Abstract
A control method and apparatus for dynamically switching a logical session in an information processing system having a network control system configuration in which a plurality of terminal devices are connected to a plurality of central processing units via at least one communication control processor. The communication control processor comprises stores histories of command data transactions corresponding to the respective terminal devices, and retrieves the histories of transactions of the terminal devices connected logically to a central processing unit to be replaced when switching from the central processing unit to be replaced to another central processing unit is performed, delivers to the processing unit to be replaced command data to disconnect logical connective relationship from the central processing unit to be replaced, and establishes logical connective relationship to the another central processing unit, and for automatically delivering the retrieved histories of the transactions to the another central processing unit.