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:
Apr. 17, 2001
Filed:
Aug. 27, 1997
Shuji Ohno, Yokohama, JP;
Tatsuya Watanuki, Yokohama, JP;
Norihiro Goto, Ebina, JP;
Takashi Kitayama, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An automatic address distributing method, computer program and system for automatically examining addresses already assigned to terminals connected to a network without regard to the status of the existing terminals and removed terminals. An address may be assigned to a terminal by apparatus other than a DHCP server. After a Dynamic Host Configuration Protocol (DHCP) server has been started, addresses currently used in a network are examined by a duplicate-address examining unit and the status of the address are stored in an in-use-address database (DB). When a terminal makes a request for distribution of an address, the DHCP server distributes an address that is currently not used in the network. In the examination carried out by the duplicate-address examining unit, an inquiry about the entire name information controlled by a Domain Name Service (DNS) server is made to the DNS server. Results of the inquiry are also stored in the in-use-address DB. Then, a mobile-agent DB is examined for a mobile agent. An inquiry about information on movement status of mobile terminals is made to the mobile agent cataloged in the mobile-agent DB. Results of this inquiry are also stored in the in-use-address DB.