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:
Jan. 22, 2008
Filed:
May. 15, 2003
Keiichi Shimizu, Tokyo, JP;
Masatsugu Yano, Tokyo, JP;
Keiichi Shimizu, Tokyo, JP;
Masatsugu Yano, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In the Mobile IPv4 network in the present invention, FA control servers () that process only Mobile IP signaling, and IP tunnel routers (), being an IP tunnel endpoint, which also function as a default router with respect to a mobile node MN, form an FA function (referred to as a virtual FA). Further, an HA control server () that processes only Mobile IP signaling, and an IP tunnel router (), being an IP tunnel endpoint, form an HA function (referred to as a virtual HA). Here, the relation between the FA control servers () and the IP tunnel routers (a,), and the relation between the HA control server () and the IP tunnel router () are such that the former is a Media Gateway Controller (MGC) and the latter is a Media Gateway (MG). The FA control server () notifies a mobile node MN () of the own address as an FA care-of address, in the form of a regular broadcast or query response. The IP tunnel router () constituting the virtual FA notifies the mobile node MN () of an address, being a default router, in the form of a regular broadcast or query response.