(19)
(11) EP 1 079 571 B8

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

(15) Correction information:
Corrected version no 1 (W1 B1)

(48) Corrigendum issued on:
13.08.2008 Bulletin 2008/33

(45) Mention of the grant of the patent:
04.10.2006 Bulletin 2006/40

(21) Application number: 00307358.2

(22) Date of filing: 25.08.2000
(51) International Patent Classification (IPC): 
H04L 12/56(2006.01)
 H04Q 11/00(2006.01)

(54)

Optical packet routing network system based on optical label switching technique

Optische Paket-Weiterleitung in einem Netzwerksystem basiert auf optische Etikett-Kopplungstechnik

Routage optique de pacquets dans un système de réseau basé sur une technique de commutation d'étiquettes optiques

(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 25.08.1999 JP 23879499
14.03.2000 JP 2000070872

(43) Date of publication of application:
28.02.2001 Bulletin 2001/09

(60) Divisional application:
04077739.3 / 1499077

(73) Proprietor: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Tokyo 100-8116 (JP)

(72) Inventors:
  • Okada, Akira, NTT Int. Property Center
    Musashino-shi, Tokyo 180-8585 (JP)
  • Kato, Kazutoshi, c/o NTT Int. Property Center
    Musashino-shi, Tokyo 180-8585 (JP)
  • Sakamoto, Takashi, c/o NTT Int. Property Center
    Musashino-shi, Tokyo 180-8585 (JP)
  • Matsuoka, Morito, c/o NTT Int. Property Center
    Musashino-shi, Tokyo 180-8585 (JP)
  • Suzuki, Sen-ichi, c/o NTT Int. Property Center
    Musashino-shi, Tokyo 180-8585 (JP)
  • Noguchi, Kazuto, c/o NTT Int. Property Center
    Musashino-shi, Tokyo 180-8585 (JP)
  • Sakai, Yoshihisa, c/o NTT Int. Property Center
    Musashino-shi, Tokyo 180-8585 (JP)

(74) Representative: Hutchinson, Glenn Stanley et al
Harrison Goddard Foote Fountain Precinct Balm Green
Sheffield S1 2JA
Sheffield S1 2JA (GB)


(56) References cited: : 
EP-A- 0 223 258
FR-A- 2 709 839
US-A- 5 488 501
US-A- 5 617 233
 EP-A- 0 494 831
US-A- 5 175 777
US-A- 5 504 607
   
       
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).