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:
Dec. 11, 2007
Filed:
Jan. 02, 2004
Atsushi Iwasaki, Yokosuka, JP;
Masahiro Sawada, Yokohama, JP;
Shinichi Isobe, Yokosuka, JP;
Takeshi Ihara, Yokosuka, JP;
Atsushi Iwasaki, Yokosuka, JP;
Masahiro Sawada, Yokohama, JP;
Shinichi Isobe, Yokosuka, JP;
Takeshi Ihara, Yokosuka, JP;
NTT DoCoMo, Inc., Tokyo, JP;
Abstract
A mobile communications system is disclosed that includes a first local routing manager (LRM) providing a first network in which a mobile terminal is currently located, a second local routing manager (LRM) providing a second network in which a counterpart terminal communicating with the mobile terminal is currently located, and a home routing manager (HRM) managing correspondence between the unique home address of the counterpart terminal and the second network. The first LRM has a controller that acquires address information of the counterpart terminal from the second LRM, via the HRM, when the first LRM does not have the address information, and communication means that transmits the address information of the counterpart terminal to a router of a new cell in the first network when the mobile terminal moves into the new cell.