Title:
MULTIPOINT MONITORING METHOD, MULTIPOINT MONITORING SYSTEM AND MONITORING STATION UNIT
Document Type and Number:
WIPO Patent Application WO/2004/070974
Kind Code:
A1
Abstract:
A multipoint monitoring method for monitoring a plurality of monitoring points by connecting them with a monitoring station through an optical transmission line in which an optical abnormality detection signal of the wavelength component specific to a monitoring point where an abnormality is detected is multiplexed with an optical signal supplied from the optical transmission line before being output on to the optical transmission line. According to such a multipoint monitoring method, a monitoring point where an abnormality is occurring can be specified based on presence of each wavelength component by demultiplexing the optical signal supplied from the optical transmission line into respective wavelength components at the monitoring station.
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Inventors:
OOAKU SHIGEO (JP)
SUZUKI YASUO (JP)
MATSUSHITA AKIHIRO (JP)
SUZUKI YASUO (JP)
MATSUSHITA AKIHIRO (JP)
Application Number:
PCT/JP2003/001131
Publication Date:
August 19, 2004
Filing Date:
February 04, 2003
Export Citation:
Assignee:
FUJITSU LTD (JP)
OOAKU SHIGEO (JP)
SUZUKI YASUO (JP)
MATSUSHITA AKIHIRO (JP)
OOAKU SHIGEO (JP)
SUZUKI YASUO (JP)
MATSUSHITA AKIHIRO (JP)
International Classes:
H04B10/07; H04B10/077; H04B10/079; (IPC1-7): H04B10/00
Foreign References:
| JP2002319898A | 2002-10-31 | |||
| JPS5183705A | 1976-07-22 | |||
| JPH08111665A | 1996-04-30 |
Other References:
Kunio SHINOHARA et al., "66kV Kruiyamasen/Chuzenjisen Kosho Kukan Hyotei System no Do'nyu", Koga Denko Jiho, No. 97, (1995) pages 100 to 108
Attorney, Agent or Firm:
Itoh, Tadahiko (Yebisu Garden Place Tower 20-3, Ebisu 4-chom, Shibuya-ku Tokyo, JP)
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