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:
Apr. 28, 2009
Filed:
Sep. 12, 2006
Akihiro Kawamoto, Kawasaki, JP;
Kenji Iwasawa, Kawasaki, JP;
Shoji Ohshima, Kawasaki, JP;
Masahiko Okajima, Kahoku, JP;
Nobuyuki Shichino, Kahoku, JP;
Akihiro Kawamoto, Kawasaki, JP;
Kenji Iwasawa, Kawasaki, JP;
Shoji Ohshima, Kawasaki, JP;
Masahiko Okajima, Kahoku, JP;
Nobuyuki Shichino, Kahoku, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
The network communication system is capable of communicating with many internal units at high speed, improving reliability of the system and decreasing a production cost and a development cost. The network communication system comprises a plurality of control units respectively connected to internal LANs, which connect internal units mutually. Each of the control units includes: a port opening/closing unit for selectively setting the control unit in an open state, in which the control unit acts as the unit having a common IP address of the control units with respect to the external network, or in a close state, in which an access to the control unit from the external network is prohibited; and a unit for solving the address duplication, which sets the control unit in the close state and changes the network address of the corresponding internal LAN so as to solve the address duplication. One of the control units is set in the open state, and the rest of the control units is set in the close state.