Method and apparatus for upgrading software subsystems without interrupting service

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6070012
SERIAL NO

09083020

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Abstract

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A method and system for updating a software subsystem while services are being provided by the software subsystem is provided. Initially, instructions are processed from a primary software subsystem loaded at a first base address associated with a primary storage unit. A secondary software subsystem is downloaded at a second base address associated with a secondary storage unit while the primary software subsystem is being executed. The secondary software subsystem typically contains an updated version of the primary software subsystem. To install the updated software subsystem, the first base address associated with the primary storage unit is swapped with the second base address associated with the secondary storage unit. Execution continues using the updated software subsystem without a significant interruption in service.

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Patent Owner(s)

  • NORTEL NETWORKS LIMITED

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Eitner, William H Milpitas, CA 1 124
Mahanty, Suresh D Mountain View, CA 1 124

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