(19)
(11) EP 1 434 396 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 158(3) EPC

(48) Corrigendum issued on:
08.12.2004 Bulletin 2004/50

(43) Date of publication:
30.06.2004 Bulletin 2004/27

(21) Application number: 02800708.6

(22) Date of filing: 27.09.2002
(51) International Patent Classification (IPC)7: H04L 12/56
(86) International application number:
PCT/JP2002/010091
(87) International publication number:
WO 2003/032588 (17.04.2003 Gazette 2003/16)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 02.10.2001 JP 2001306650

(71) Applicant: NTT DoCoMo, Inc.
Tokyo 100-6150 (JP)

(72) Inventors:
  • OMAE, Koji, c/o Intel. Prop. Dept, NTT DoCoMo Inc.
    Chiyoda-ku, Tokyo 100-6150 (JP)
  • OKAJIMA, Ichiro, c/o Intel. Prop. Dept, NTT DoCoMo
    Chiyoda-ku, Tokyo 100-61 (JP)
  • UMEDA, Narumi, c/o Intel. Prop. Dept., NTT DoCoMo
    Chiyoda-ku, Tokyo 100-6150 (JP)

(74) Representative: GROSSE BOCKHORNI SCHUMACHER 
Patent- und Rechtsanwälte Forstenrieder Allee 59
81476 München
81476 München (DE)

   


(54) MOBILITY CONTROL SYSTEM, MOBILE NODE USED IN THE SYSTEM, MOBILITY CONTROL METHOD, MOBILITY CONTROL PROGRAM, AND MOBILITY CONTROL NODE


(57) When a mobile node MN moves from an access router AR3 to another access router AR4, it sends a multi-binding on request to a mobility agent MA1 and then moves (1○). Receiving the multi-binding on request, the mobility agent MA1 voluntarily configures prospective CoA's (probable CoA's). The probable CoA's are added as forwarding addresses while an M bit is set on in an register of the mobile node MN on a binding cache (2○). When the mobility agent MA1 receives a capsuled packet addressed to the mobile node MN thereafter, it tunnel-forwards the packet to CoA3, probable CoA2, and probable CoA4 according to the binding cache (3○).