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:
Oct. 17, 2006
Filed:
Feb. 28, 2002
Masashi Yano, Yokohama, JP;
Tetsuhiko Hirata, Yokohama, JP;
Masaya Hayashi, Kawasaki, JP;
Hiroaki Nakazawa, Chigasaki, JP;
Masashi Yano, Yokohama, JP;
Tetsuhiko Hirata, Yokohama, JP;
Masaya Hayashi, Kawasaki, JP;
Hiroaki Nakazawa, Chigasaki, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A mobile data communication system capable of shortening the interruption time of communication includes an HA device, advertising routers, base stations, routers, and mobile terminal devices. Each base station advertises an address having '1' set in a different bit of an interface ID of a routing address. When a mobile terminal has received radio waves from a plurality of base stations in the vicinity of a boundary between cells, the mobile terminal combines a plurality of received routing addresses by logical summation and registers a resultant routing address with the HA device. As for a packet delivered from the HA device to the routing address and having '1' in a plurality of bits of the host section, a router resolves the address of the host section into destination addresses each having “1” in one bit, generates packets each having one of resultant addresses, and transmits the generated packets.