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. 27, 2009
Filed:
Mar. 12, 2002
Applicant:
Masahiro Ohki, Tokyo, JP;
Inventor:
Masahiro Ohki, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04Q 7/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
A mobile node MN registers a care-of address CoA of a destination with a home agent HA. A node CN to communicate with the mobile node MN inquires a name server DNSY about the care-of address CoA of the mobile node. The name server DNSY obtains the care-of address CoA from the home agent HA and sends it to the node CN in reply. The node CN communicates with the mobile node MN by using the care-of address as the destination address. Alternatively, an access router provided in a subnet holds the care-of address CoA, and forwards packets to the mobile node. This reduces the control traffic and eliminates the triangle routing.