Title:
PON SYSTEM AND OLT
Document Type and Number:
WIPO Patent Application WO/2014/097480
Kind Code:
A1
Abstract:
An OLT (1) is provided with: a topology map retaining unit (11) which retains a topology map of a PON system; a link break detection unit (12) which detects a link break of an ONU (2); a warning collection unit (13) which collects warnings from the ONU (2); a filtering unit (14) which extracts warnings due to the ONU (2) among the warnings collected by the warning collection unit (13); a failure location estimation unit (15) which, in a case in which a link break of the ONU (2) is detected by the link break detection unit (12) and there is no warning extracted by the filtering unit (14), estimates which optical fiber cable (5) in which the failure has occurred on the basis of the topology map retained by the topology map retaining unit (11); and a failure location notification unit (16) which reports the information indicating the failure location estimated by the failure location estimation unit (15) to the outside.
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Inventors:
KOTANI GENYA (JP)
Application Number:
PCT/JP2012/083306
Publication Date:
June 26, 2014
Filing Date:
December 21, 2012
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
KOTANI GENYA (JP)
KOTANI GENYA (JP)
International Classes:
H04L12/44
Domestic Patent References:
| WO2009037300A1 | 2009-03-26 |
Foreign References:
| JP2012156612A | 2012-08-16 | |||
| JP2008166876A | 2008-07-17 |
Other References:
TAKASHI KIKUZAWA ET AL.: "A Study on Link Status Monitoring in Power Saving Mode in PON System", IEICE TECHNICAL REPORT (TECHNICAL REPORT OF IEICE, vol. 111, no. 410, 19 January 2012 (2012-01-19), pages 91 - 94
Attorney, Agent or Firm:
TAZAWA, Hideaki et al. (JP)
Hideaki Tazawa (JP)
Hideaki Tazawa (JP)
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