Mobile IP communication scheme incorporating individual user authentication

(56) References Cited
U.S. PATENT DOCUMENTS
5,159,592 A 10/1992 Perkins
5,325,362 A 6/1994 Aziz
5,668,876 A * 9/1997 Falk et al. ................ .. 380/271
(Continued)
FOREIGN PATENT DOCUMENTS
JP 5—241998 A 9/1993
JP 9—153891 A 6/1997

OTHER PUBLICATIONS

C. Perkins, Editor, “IP Mobility Support,” Network Working
Group, Oct. 1996, pp. 1-79.

(Continued)

Primary Examiner—Ricky Ngo

Assistant Examiner—Duc Duong

(74) Attorney, Agent, or Firm—Foley & Lardner LLP
(57) ABSTRACT
A mobile IP communication scheme capable of authenticat-
ing an individual user who is operating the mobile computer
when the mobile computer is connected to a visited site
network and transmits a current location registration mes-
sage to the home agent is disclosed. Auser authentication to
judge a properness of a user of the mobile computer is
carried out according to a user input based information, and
the current location of the mobile computer is registered at
the mobile computer management device (home agent)
when the user is judged as a proper user. The user authen-
tication can be carried out either at the mobile computer
management device according to a user input based infor-
mation received from the mobile computer, or at the mobile
computer according to an information entered by the user at
the mobile computer.

6 Claims, 13 Drawing Sheets

Page 2 U.S. PATENT DOCUMENTS OTHER PUBLICATIONS 5,793,762 A 8/1993 PCIIIIBIS CI 111- K. Hayashi et al., “A Study on Control Information Trans6>061>650 A 5/2000 Malkin ct al" mission Method in Personal Communication Using an ATM

6,075,776 A 6/2000 Tanimoto et al.

6,144,671 A * 11/2000 Perinpanathan et al. 370/409

6,243,758 B1 6/2001 Okanoue

6,442,616 B1 * 8/2002 Inoue et al. .............. .. 709/245 2001/0041571 A1 11/2001 Yuan * cited by examiner

Network”, the Institute of Electronics, Information and
Communication Engineers, IN92-80 (Nov. 1992), pp. 51-56.

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