KR100387956B1 - Transmission distance measuring method and apparatus using signal loopback in optical transmission module for imt-2000 digital optical repeater - Google Patents

Transmission distance measuring method and apparatus using signal loopback in optical transmission module for imt-2000 digital optical repeater Download PDF

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Publication number
KR100387956B1
KR100387956B1 KR1020020071456A KR20020071456A KR100387956B1 KR 100387956 B1 KR100387956 B1 KR 100387956B1 KR 1020020071456 A KR1020020071456 A KR 1020020071456A KR 20020071456 A KR20020071456 A KR 20020071456A KR 100387956 B1 KR100387956 B1 KR 100387956B1
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KR
South Korea
Prior art keywords
pulse
remote station
bit
loopback
optical
Prior art date
Application number
KR1020020071456A
Other languages
Korean (ko)
Inventor
Jae Il Cho
Seok Haeng Heo
Jeong Hoon Ko
Original Assignee
It Co Ltd
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Priority to KR1020020071456A priority Critical patent/KR100387956B1/en
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Publication of KR100387956B1 publication Critical patent/KR100387956B1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/29Repeaters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/077Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
    • H04B10/0775Performance monitoring and measurement of transmission parameters

Abstract

PURPOSE: A transmission distance measuring method and apparatus using a signal loopback in an optical transmission module for an IMT-2000 digital optical repeater are provided to simply measure a distance by generating a pulse and measuring time taken from a point when the pulse is returned through a signal loopback at a remote station to a point when the pulse signal comes back. CONSTITUTION: An optical signal received from upward is changed to 16 144 Mb/s signals through an optical repeater(201) and a 1:16 demultiplexer(202), and an overhead and a payload bit are demultiplexed through a reframer(204). The 16 155 Mb/s signals including a pulse bit are inputted to the reframer(204) and simultaneously to a16:1 multiplexer(210), and then transmitted to the next remote station. As for the pulse bit extracted by an overhead processor(208), if a pertinent remote station is an object for a distance measurement, a loopback switch(206) is connected by controlling a distance measurement pulse loopback of a remote station NMS(Network Management System) and then the pulse bit is returned reversely through an OR gate(207). The returned pulse bit gets back to a distribution station. If the pertinent remote station is not an object for distance measurement, the OR gate(207) passes the pulse bit inputted reversely through a reframer(209).
KR1020020071456A 2002-11-18 2002-11-18 Transmission distance measuring method and apparatus using signal loopback in optical transmission module for imt-2000 digital optical repeater KR100387956B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020020071456A KR100387956B1 (en) 2002-11-18 2002-11-18 Transmission distance measuring method and apparatus using signal loopback in optical transmission module for imt-2000 digital optical repeater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020020071456A KR100387956B1 (en) 2002-11-18 2002-11-18 Transmission distance measuring method and apparatus using signal loopback in optical transmission module for imt-2000 digital optical repeater

Related Child Applications (1)

Application Number Title Priority Date Filing Date
KR20-2002-0034311U Division KR200304999Y1 (en) 2002-11-18 2002-11-18 A transmission distance measurement apparatus using the signal loop-back in an optical transmission module for an IMT-2000 digital optical repeater network

Publications (1)

Publication Number Publication Date
KR100387956B1 true KR100387956B1 (en) 2003-06-25

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KR1020020071456A KR100387956B1 (en) 2002-11-18 2002-11-18 Transmission distance measuring method and apparatus using signal loopback in optical transmission module for imt-2000 digital optical repeater

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100866185B1 (en) * 2002-01-15 2008-10-30 삼성전자주식회사 Method and apparatus for compensating fiber optic delay in synchronous mobile communication system using synchronous digital hierarchy
KR100907249B1 (en) 2007-07-04 2009-07-10 한국전기연구원 TOA and TDOA estimating method considering clock drifting influence of the wireless positioning
CN102916739A (en) * 2012-10-31 2013-02-06 索尔思光电(成都)有限公司 Real-time loop-back control system for optical module
WO2015083920A1 (en) * 2013-12-04 2015-06-11 주식회사 쏠리드 Optical repeater in ring topology scheme

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100866185B1 (en) * 2002-01-15 2008-10-30 삼성전자주식회사 Method and apparatus for compensating fiber optic delay in synchronous mobile communication system using synchronous digital hierarchy
KR100907249B1 (en) 2007-07-04 2009-07-10 한국전기연구원 TOA and TDOA estimating method considering clock drifting influence of the wireless positioning
CN102916739A (en) * 2012-10-31 2013-02-06 索尔思光电(成都)有限公司 Real-time loop-back control system for optical module
WO2015083920A1 (en) * 2013-12-04 2015-06-11 주식회사 쏠리드 Optical repeater in ring topology scheme
US9559777B2 (en) 2013-12-04 2017-01-31 Solid, Inc. Relay system in ring topology
US10873795B2 (en) 2013-12-04 2020-12-22 Solid. Inc. Relay system in ring topology

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