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:
Jun. 09, 1992
Filed:
Nov. 18, 1988
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 processing units via at least one communication control processer. The communication control processor includes storage area for storing histories of command data transactions corresponding to the respective terminal devices, and retrieves the histories of command data transactions of the terminal devices connected logically to a processing unit to be replaced when switching from the 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 processing unit to be replaced, and establishes logical connective relationship to the replacing processing unit, and for automatically delivering the retrieved histories of the command data transactions to the replacing processing unit.