(19)
(11) EP 1 744 519 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
09.05.2007 Bulletin 2007/19

(43) Date of publication:
17.01.2007 Bulletin 2007/03

(21) Application number: 06076423.0

(22) Date of filing: 14.07.2006
(51) International Patent Classification (IPC): 
H04L 29/08(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK YU

(30) Priority: 15.07.2005 JP 2005206275

(71) Applicant: NEC Corporation
Tokyo 108-01 (JP)

(72) Inventors:
  • Shinohara, Noriko c/o NEC Corporation
    Minato-ku Tokyo (JP)
  • Ito, Naoko c/o NEC Corporation
    Minato-ku Tokyo (JP)
  • Hashiguchi, Atsushi c/o NEC Communication Systems, Ltd.
    Minato-ku Tokyo (JP)
  • Hataya, Noriko c/o NEC Communication Systems, Ltd.
    Minato-ku Tokyo (JP)
  • Ueda, Yasuyuki c/o NEC Communication Systems, Ltd.
    Minato-ku Tokyo (JP)

(74) Representative: Wenzel & Kalkoff 
Grubes Allee 26
22143 Hamburg
22143 Hamburg (DE)

   


(54) Information exchange system, management server, and method for reducing the network load


(57) A resource list server issues SUBSCRIBE requests for individual resources in a list upon receiving a SUBSCRIBE request for the list. Then, when the resource list server has received NOTIFY messages that indicate the status of the individual resources from a notifier for the resources, the resource list server sends NOTIFY messages to a subscriber that has a subscription for the list, which includes the resources. When the notifier has received a request for updating an existing subscription, the resource list server sends a NOTIFY message that includes no content to the subscriber.