PROGRAM/DATA NON-INTERRUPTION UPDATING SYSTEM FOR OPTIONAL PROCESSOR

Japanese Patent JP3394189

B2

PROBLEM TO BE SOLVED: To enable a system to change a program to be executed by an optional central processing unit(CPU) and data to be referred to by the program to a new program and data as the system is in operation.
SOLUTION: A CPU A1 informs a CPU B4 of the transfer of a new program and new data to switch the CPU B4 to a stand-by system. The CPU B4 switched to the stand-by system selectively receives the new program 46 and the new data 47 from the CPU A1 and restarts operation by the new program and data 46, 47. During the period, a CPU B3 continues its operation as an active system. When the operation of the CPU B4 succeeds, the CPUs B3, B4 are switched between the active system and the stand-by system, the program/data of the CPU B3 are also updated and returned to double constitution for synchronous operation. When the operation of the CPU B4 fails, operation based on the old program and data of the CPU B3 is continued.

WO/2004/105326	TIME-TRIGGERED COMMUNICATION SYSTEM AND METHOD FOR THE SYNCHRONIZED START OF A DUAL-CHANNEL NETWORK
JP5338913	Update management device and method
JPH07121258	DEVICE CONSTITUTION INFORMATION MANAGEMENT SYSTEM FOR SUBORDINATE SYSTEM

Satoshi Sunaga
Kiyoshi Ueda

JP23508898A

April 07, 2003

August 21, 1998

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Nippon Telegraph and Telephone Corporation

G06F11/20; G06F9/06; G06F11/00; G06F15/16; G06F15/177; (IPC1-7): G06F11/20; G06F11/00; G06F15/177

JP8106399A

Yoshiyoshi Ogasawara (1 outside)

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