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. 19, 1999
Filed:
Jul. 01, 1997
Ryuhei Fujiwara, Tokyo, JP;
Seiji Shimizu, Tokyo, JP;
NEC Corporation, , JP;
Abstract
There is disclosed a method for controlling the position of a mobile host in a local area network (LAN), whereby the movement of the mobile host out of a certain LAN can be quickly detected even when the mobile host transmits no frames and invalid traffic can be reduced. A server 3 duplicates a learning function table in a bridge device 2 at each specified time. Location confirmation is performed for the currently connected mobile host based on this duplicated information at each specified time. If the mobile host gives no response to the location confirmation, the movement of this mobile host is determined and the learning function table in the bridge device 2 is renewed. Thus, even when the mobile host is moved out of the LAN and no frames are transmitted therefrom, the movement of the mobile host can be quickly detected and invalid traffic can be reduced.