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:
Feb. 12, 2008
Filed:
Dec. 18, 2003
Hideaki Takahashi, Yokohama, JP;
Koji Omae, Yokohama, JP;
Masahiro Inoue, Yokosuka, JP;
Ichiro Okajima, Yokohama, JP;
Narumi Umeda, Yokohama, JP;
Hideaki Takahashi, Yokohama, JP;
Koji Omae, Yokohama, JP;
Masahiro Inoue, Yokosuka, JP;
Ichiro Okajima, Yokohama, JP;
Narumi Umeda, Yokohama, JP;
NTT DoCoMo, Inc., Tokyo, JP;
Abstract
An object of the present invention is to decrease a care-of address update duration in switching of a link used for connection to an IP network by a mobile node (MN). MN acquires a list of access routers (ARs) existing on neighboring links to the link used for connection by the mobile node and creates a list of care-of addresses (CoAs) corresponding to the respective ARs entered in the list, each CoA being used as a destination of MN at a link on which an AR corresponding thereto exists. After the change of the connected link, MN acquires a data link layer address of AR existing on the link after the change and detects a default router on the basis of the address with reference to the access node list. Furthermore, MN detects a CoA with a network prefix corresponding with a subnet prefix of the default router, as a primary CoA and requests MAP to register a binding between the primary CoA and HoA.