PON SYSTEM AND COMMUNICATION CONTROL METHOD

WIPO Patent Application WO/2018/225414

A1

The present invention ensures the dispatching of an emergency notification from a terminal device when a communication failure due to constant light emission of an optical network unit (ONU) has occurred in a passive optical network (PON) system. A PON system (10) is provided with a plurality of ONUs (500-502) connected to an optical line terminal (OLT) (100) via an optical divider (300), wherein data is transmitted to the OLT (100) by time-division multiplexing. The ONU (500) comprises an emergency notification detection unit (540) for detecting an emergency notification request from a telephone terminal (900), and an emergency dispatching control unit (550) for outputting a disconnection request between the ONUs (501, 502) and the OLT (100) to the optical divider (300) if the connection of the ONU (500) to the OLT (100) is not established when the emergency notification request is detected. The optical divider (300) comprises an optical line control unit (330) for disconnecting the ONUs (501, 502) and the OLT (100) in accordance with the disconnection request.

JPH05145494	OPTICAL WAVELENGTH MULTIPLEX SIGNAL TRANSMITTER
JP4602853	Emergency call system
JP2018129758	SUBSCRIBER LINE TERMINAL APPARATUS, TRANSPORT DEVICE, AND MISCONNECTION DETECTION METHOD

KUREBAYASHI HIROKI (JP)

PCT/JP2018/016720

December 13, 2018

April 25, 2018

Click for automatic bibliography generation  

NEC PLATFORMS LTD (JP)

H04L12/44; H04B10/03; H04B10/272

JP2016010074A	2016-01-18
JPH09153858A	1997-06-10
JPS6413847A	1989-01-18
JP2009065558A	2009-03-26
JP2014171079A	2014-09-18
JP2008283324A	2008-11-20
JP2014171079A	2014-09-18
JP2010219878A	2010-09-30
JPS6413847A	1989-01-18

See also references of EP 3442173A4

IEIRI Takeshi (JP)

View/Download PDF      PDF Help

Previous Patent: FUEL TANK MANUFACTURING DEVICE

Next Patent: SUBSTRATE AND METHOD FOR PRODUCING FILM SUBSTRATE