KR20010099451A - System of Optical transmission - Google Patents
System of Optical transmission Download PDFInfo
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- KR20010099451A KR20010099451A KR1020010060792A KR20010060792A KR20010099451A KR 20010099451 A KR20010099451 A KR 20010099451A KR 1020010060792 A KR1020010060792 A KR 1020010060792A KR 20010060792 A KR20010060792 A KR 20010060792A KR 20010099451 A KR20010099451 A KR 20010099451A
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- division multiplexer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
- H04B10/25758—Optical arrangements for wireless networks between a central unit and a single remote unit by means of an optical fibre
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
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- Electromagnetism (AREA)
- Optical Communication System (AREA)
Abstract
본 발명은 광전송 방식에 관한 것이다.The present invention relates to an optical transmission scheme.
본 발명의 구성은, 송수신광파장을 선별하는 광파장분할다중기(WDM:Wavelength Division Multiplexer)가 내장된 제1도너(Donor)부, 상기 제1도너부와 단일광선로로 연결되며 송수신광파장을 선별하는 광파장분할다중기(WDM:Wavelength Division Multiplexer)가 내장된 제1리모트(Remote)부로 이루어진 광전송 방식에서, 송수신광파장을 선별하는 광파장분할다중기(WDM:Wavelength Division Multiplexer)가 내장된 제2도너(Donor)부, 상기 제2도너부와 상기 단일광선로로 연결되며 송수신광파장을 선별하는 광파장분할다중기(WDM:Wavelength Division Multiplexer)가 내장된 제2모트(Remote)부를 포함하며, 상기 제1도너부와 제2도너부 사이에 제1DWDM(Dense Wavelength Division Multiplexer)을 설치하고, 상기 제1리모트부와 제2리모트부 사이에 제2DWDM(Dense Wavelength Division Multiplexer)를 설치하여 상기 단일광선로에 의해 연결되는 것을 특징으로 한다.The structure of the present invention comprises a first donor unit having a wavelength division multiplexer (WDM) for selecting transmission and reception wavelengths, and an optical wavelength connected to the first donor unit with a single optical line and selecting transmission and reception wavelengths. A second donor with a built-in Wavelength Division Multiplexer (WDM) for selecting transmission and reception wavelengths in an optical transmission method including a first remote unit having a Wavelength Division Multiplexer (WDM). And a second remote unit connected to the second donor unit and the single optical line and having a wavelength division multiplexer (WDM) configured to select transmission / reception wavelengths. The first donor unit and the second donor unit include: A first Dense Wavelength Division Multiplexer (DWDM) is provided between two donor portions, and a second Dense Wavelength Division Multiplexer (DWDM) is installed between the first remote portion and the second remote portion and connected by the single optical line. It is characterized.
따라서, 본 발명에 의하면, 다른 이동통신 서비스를 기존 광전송 방식의 단일광선로에 추가 설치하여 하나의 광선로로 두 개이상의 통신서비스를 받을 수 있는 효과를 얻을 수 있다.Therefore, according to the present invention, another mobile communication service may be additionally installed in a single optical path of an existing optical transmission method, thereby obtaining an effect of receiving two or more communication services in one optical path.
Description
본 발명은 광전송 방식에 관한 것으로, 더욱 상세하게는 단일광선로로 두 가지 이상의 통신 서비스를 받을 수 있는 광전송 방식에 관한 것이다.The present invention relates to an optical transmission method, and more particularly, to an optical transmission method capable of receiving two or more communication services in a single optical path.
현재, IS-95 A/B/C 이동통신용 셀 구성방식 기지국의 효율적인 운영방안으로 대두되고 있는 전송시스템으로 광중계기가 많이 활용되고 있다.Currently, optical repeater is widely used as a transmission system that has emerged as an efficient operation plan of an IS-95 A / B / C mobile communication base station.
상기 광중계기는 지하공간 및 기지국과 기지국사이의 경계 및 전파가 도달하지 못하는 음영지역에 적절하게 사용되어 이동통신용 마이크로 셀(Mocro-Cell)망을 형성하여 기지국대치로 그 이용가치가 극대화되고 있다.The optical repeater is appropriately used in the underground space and the shadow area where the boundary between the base station and the base station does not reach, forming a mobile cell micro-cell (Mocro-Cell) network to maximize the use value of the base station replacement.
현재 사용하고 있는 광중계기의 구성방식을 살펴보면, 기지국과 음영지역사이의 전송로를 케이블로 하여 하나의 미니 셀(Mini-Cell)을 형성하고 있다.Looking at the configuration of the optical repeater currently in use, a mini-cell is formed by using a cable between the base station and the shadow area as a cable.
이러한 이동통신 서비스 방식은 수요의 폭발로 인해 나날이 서비스의 용량의 증대를 요구하고 있다.These mobile communication service methods are required to increase the capacity of the service every day due to the explosion of demand.
따라서, 최근 들어 많은 이러한 서비스 용량의 증대를 갖는 IMT-2000, EV-DO, EV-DV, HDR등등의 이동통신용 서비스 방식이 제안되어 있다.Therefore, in recent years, a mobile communication service method such as IMT-2000, EV-DO, EV-DV, HDR, etc. having such a large increase in service capacity has been proposed.
그러나, 차후 이러한 추가 서비스방식들에 대한 마이크로 셀(Mocro-Cell) 구성 시, 추가되는 광선로망의 설비 및 설치비용을 감안할 때, 경비절감의 대책이 시급한 상황이다.However, when constructing a micro-cell for these additional service methods, cost reduction measures are urgently needed, considering the additional cost and installation cost of the optical fiber network.
현재 IS-95 A/B/C 이동통신 이동중계장치의 마이크로 셀(Mocro-Cell)구성 시, 도 1에서와 같이, 기지국에 장착되는 광중계기 도너(Donor)부(100) 와 광중계기 리모트(Remote)(200)사이의 전송로는 1개의 광케이블(300)을 사용하며, 상기에서 사용하는 광파장(Optical Wavelength)은 상기 도너(Donor)부(100)에서 상기 리모트(Remote)부(200)로 전송 시 1550nm의 광파장을, 상기 리모트(Remote)부(200)에서 상기 도너(Donor)부(100)로 전송 시에는 1310nm의 광파장으로 한 개의 광선로(300)를 이용하기 위해 서로 다른 광파장을 사용하였다.When configuring a micro-cell of an IS-95 A / B / C mobile communication mobile repeater, as shown in FIG. 1, an optical repeater donor unit 100 and an optical repeater remote ( The transmission path between the remote 200 uses one optical cable 300, and the optical wavelength used above is transferred from the donor unit 100 to the remote unit 200. When transmitting the light wavelength of 1550nm, when transmitting from the remote unit 200 to the donor unit 100 uses a different light wavelength to use a single optical path 300 with an optical wavelength of 1310nm. It was.
상기 광중계기 도너(Donor)부(100)의 내부 시스템은 도 2에, 상기 광중계기의 리모트(Remote)부의 내부 시스템은 도3에 도시되어 있다.An internal system of the optical repeater donor unit 100 is shown in FIG. 2, and an internal system of the remote unit of the optical repeater is shown in FIG.
따라서, 본 발명의 목적은 종래의 문제점을 해결하기 위한 것으로, 기존에 설치되어 있는 광선로를 이용하여 추가서비스를 제공할 수 있기 위해 다중다파 하이브리드(Hybrid) 광전송 방식을 구현하는데 그 목적이 있다.Accordingly, an object of the present invention is to solve a conventional problem, and to provide a multi-wave hybrid optical transmission scheme in order to provide an additional service using an existing optical path.
도 1은 종래의 광전송 방식 구성도.1 is a configuration diagram of a conventional optical transmission method.
도 2는 도너부(Donor)부의 시스템 계통도.2 is a system schematic diagram of a donor unit.
도 3은 리모트(Remote)부의 시스템 계통도.3 is a system schematic diagram of a remote unit.
도 4는 본 발명에 따는 광전송 방식 구성도.Figure 4 is a block diagram of a light transmission method according to the present invention.
도 5는 본 발명에 따른 제1DWDMD(Dense Wavelength Division Multiplexer)과 제2DWDM(Dense Wavelength Division Multiplexer)의 계통도.5 is a schematic diagram of a first dense wavelength division multiplexer (DWDMD) and a second dense wavelength division multiplexer (DWDM) according to the present invention;
도 6은 본 발명에 따른 제1DWDM(Dense Wavelength Division Multiplexer)과 제2DWDM(Dense Wavelength Division Multiplexer)블록 다이어그램.6 is a first dense wavelength division multiplexer (DWDM) and a second dense wavelength division multiplexer (DWDM) block diagram according to the present invention;
도 7은 본 발명에 따라 옵티컬 써큘레이터(Optical Circulator)가 설치된 제1 및 제2DWDM(Dense Wavelength Division Multiplexer) 블록 다이어그램.FIG. 7 is a first and second Dense Wavelength Division Multiplexer (DWDM) block diagram in which an optical circulator is installed in accordance with the present invention. FIG.
도 8은 본 발명에 따라 옵티컬 써큘레이터(Optical Circulator)가 하나 이상 설치된 제1 및 제2DWDM(Dense-Wavelength Division Multiplexer) 블록 다이어그램.8 is a first and second dense-wavelength division multiplexer (DWDM) block diagram in which at least one optical circulator is installed in accordance with the present invention.
* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
100:제1도너부 200:제1리모트부100: first donor part 200: first remote part
300:단일광선로 300:제2도너부300: single light path 300: second donor part
500:제2리모트부500: second remote control
613,708:옵티컬 써큘레이터(Optical Circulator)613,708: Optical Circulator
600:제1DWDM(Dense Wavelength Division Multiplexer)600: First Dense Wavelength Division Multiplexer (DWDM)
700:제2DWDM(Dense Wavelength Division Multiplexer)700: second Dense Wavelength Division Multiplexer (DWDM)
상기한 바와 같은 목적을 달성하기 위한 본 발명은, 송수신광파장을 선별하는 광파장분할다중기(WDM:Wavelength Division Multiplexer)가 내장된 제1도너(Donor)부, 상기 제1도너부와 단일광선로로 연결되며 송수신광파장을 선별하는 광파장분할다중기(WDM:Wavelength Division Multiplexer)가 내장된 제1리모트(Remote)부로 이루어진 광전송 방식에서, 송수신광파장을 선별하는 광파장분할다중기(WDM:Wavelength Division Multiplexer)가 내장된 제2도너(Donor)부, 상기 제2도너부와 상기 단일광선로로 연결되며 송수신광파장을 선별하는 광파장분할다중기(WDM:Wavelength Division Multiplexer)가 내장된 제2모트(Remote)부를 포함하며, 상기 제1도너부와 제2도너부 사이에 제1DWDM(Dense Wavelength Division Multiplexer)을 설치하고, 상기 제1리모트부와 제2리모트부 사이에 제2DWDM(Dense Wavelength Division Multiplexer)를 설치하여 상기 단일광선로에 의해 연결되는 것을 특징으로 한다.The present invention for achieving the object as described above, the first donor unit having a built-in Wavelength Division Multiplexer (WDM :) to select the transmission and reception wavelengths, the first donor unit and a single optical line connected In the optical transmission method comprising a first remote unit having a WDM (Wavelength Division Multiplexer) that selects the transmission and reception wavelengths, a WDM (Wavelength Division Multiplexer) is used to select the transmission and reception wavelengths. A second donor unit, a second remote unit connected to the second donor unit and the single optical line and having a wavelength division multiplexer (WDM) configured to select the transmission / reception optical wavelengths; A first Dense Wavelength Division Multiplexer (DWDM) is disposed between the first donor portion and the second donor portion, and a second Dense Wavelength Division Multiplexer (DWDM) is installed between the first remote portion and the second remote portion. It is characterized by being connected by the single optical path.
이하에서는 상기의 목적을 달성하는 본 발명을 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, the present invention to achieve the above object will be described in detail.
도 4는 본 발명에 따는 광전송 방식 구성도이다.4 is a block diagram of an optical transmission method according to the present invention.
도 4에서와 같이, 제1도너부(100)와 제1리모트무(200)로 구성된 기존의 광전송 방식의 단일광선로(300)에 제1DWDM(Dense Wavelength Division Multiplexer)(600)와제2DWDM(Dense Wavelength Division Multiplexer)(700)를 설치하여 제2도너부(400)와 제리모트무(500)로 구성된 다른 이동통신 서비스를 설치한다.As shown in FIG. 4, a first wavelength wavelength multiplexer (DWDM) 600 and a second DWDM (Dense) are formed in a single optical path 300 of the conventional optical transmission method including the first donor part 100 and the first remote control 200. A Wavelength Division Multiplexer (700) is installed to install another mobile communication service composed of the second donor unit 400 and the Jerry remote control 500.
도 5는 본 발명에 따른 제1DWDM(Dense Wavelength Division Multiplexer)과 제2DWDM(Dense Wavelength Division Multiplexer)의 계통도이다.5 is a schematic diagram of a first dense wavelength division multiplexer (DWDM) and a second dense wavelength division multiplexer (DWDM) according to the present invention.
도 5에서 도시된 바와 같이, 상기 제1DWDM(Dense Wavelength Division Multiplexer)(600)은 제1도너부(100)와 제2도너부(400) 사이에, 상기 제2DWDM(Dense Wavelength Division Multiplexer)(700)는 제1리모트부(200)와 제2리모트부(500) 사이의 단일광선로(300)에 각각 설치된다.As shown in FIG. 5, the first Dense Wavelength Division Multiplexer (DWDM) 600 is disposed between the first donor unit 100 and the second donor unit 400 and the second Dense Wavelength Division Multiplexer (DWDM) 700. ) Are respectively installed in the single light path 300 between the first remote part 200 and the second remote part 500.
도 6은 본 발명에 따른 제1DWDM(Dense Wavelength Division Multiplexer)과 제2DWDM(Dense Wavelength Division Multiplexer)블록 다이어그램이다.6 is a first dense wavelength division multiplexer (DWDM) and a second dense wavelength division multiplexer (DWDM) block diagram according to the present invention.
도 6에서, 도 4의 제1도너부(100)와 제1리모트부(400)는 서로 다른 광파장으로 송수신하며, 추가되는 이동통신 서비스의 제2도너부(200)와 제2리모트부(500)도 서로 다른 광파장으로 송수신한다.In FIG. 6, the first donor part 100 and the first remote part 400 of FIG. 4 transmit and receive at different optical wavelengths, and the second donor part 200 and the second remote part 500 of the mobile communication service are added. ) Also transmit and receive at different wavelengths.
상기 추가되는 이동통신 서비스의 서로 다른 송수신 광파장은 기존의 송수신 광파장과는 다른 광파장을 사용한다.Different transmission / reception optical wavelengths of the added mobile communication service use an optical wavelength different from the conventional transmission / reception optical wavelengths.
도 6의 제1DWDM(Dense Wavelength Division Multiplexer)(600)은 도 4의 제1도너부(100)와 양방향의 단일광선로(a)로 연결되기 위해 필요한 제1WDM(Wavelength Division Multiplexer)(601)과, 제2도너부(200)와 단일광선로(b)로 연결되며 상기 제1도너부(100)의 송신광파장(1550nm)과 상기 제2도너부(200)의 송수신 광파장(1530nm,1510nm)을 선별하는 제2WDM(Wavelength Division Multiplexer)(603)과, 제2DWDM(Dense Wavelength Division Multiplexer)(700)과 양방향의단일광선로(c)로 연결되며 상기 제1도너부(100)의 송수신광파장(1550nm,1310nm)과 도 4의 제2도너부(200)의 송수신광파장(1530nm,1510nm)을 선별하는 제3WDM(Dense Wavelength Division Multiplexer)(604)과 적어도 하나 이상의 필터부(602,605,606)로 구성된다.The first dense wavelength division multiplexer (DWDM) 600 of FIG. 6 is connected to the first wavelength division multiplexer (WDM) 601 necessary to be connected to the first donor unit 100 of FIG. The second donor unit 200 is connected to the single optical line b, and the transmission light wavelength (1550 nm) of the first donor unit 100 and the transmission and reception light wavelengths (1530 nm, 1510 nm) of the second donor unit 200 are provided. Transmitted / received light wavelength (1550 nm) of the first donor part 100 connected to a second wavelength division multiplexer (WDM) 603 and a second density wavelength division multiplexer (DWDM) 700 to form a bidirectional single optical path (c). 1310 nm) and a third WDM (Dense Wavelength Division Multiplexer) 604 for selecting transmission / receiving light wavelengths (1530 nm and 1510 nm) of the second donor part 200 of FIG. 4 and at least one filter part 602, 605, 606.
도 6에서 제2DWDM(Dense Wavelength Division Multiplexer)(700)은 상기 제1DWDM(Dense Wavelength Division Multiplexer)(600)과 양방향의 단일광선로(c')로 연결되며 도 4의 제1리모트부(400)의 송수신파장(1310nm,1550nm)과 제2리모트부(500)의 송수신광파장(1510nm,1530nm)을 선별하는 제4WDM(Wavelength Division Multiplexer)(704)과, 도 4의 제2리모트부(500)와 양방향의 단일광선로(b')로 연결되며 제1리모트부(200)의 수신광파장(1550nm)과 제2리모트부(500)의 송수신광파장(1510nm,1530nm)을 선별하는 제5WDM(Wavelength Division Multiplexer)(705)과, 도 4의 제1리모트부(400)와 단일광선로(a')로 연결되기 위한 제6WDM(Wavelength Division Multiplexer)과 적어도 하나 이상의 필터부(702,703,706)로 구성된다.In FIG. 6, the second dense wavelength division multiplexer (DWDM) 700 is connected to the first dense wavelength division multiplexer (DWDM) 600 by a single optical line c ′ in both directions and the first remote unit 400 of FIG. 4. A fourth WDM (Wavelength Division Multiplexer) 704 for selecting transmission / reception wavelengths (1310 nm, 1550 nm) and transmission and reception wavelengths (1510 nm, 1530 nm) of the second remote part 500, and the second remote part 500 of FIG. A fifth WDM (Wavelength Division Multiplexer) that is connected by a single optical line b 'in both directions and selects a reception light wavelength (1550 nm) of the first remote part 200 and a transmission and reception light wavelength (1510 nm and 1530 nm) of the second remote part 500. 705, a sixth Wavelength Division Multiplexer (WDM) and at least one or more filter units 702, 703 and 706 to be connected to the first remote unit 400 of FIG. 4 by a single optical line a '.
도 6과 같은 제1 및 제2DWDM(Dense Wavelength Division Multiplexer)가 설치된 본 발명의 동작을 상세히 설명하면 다음과 같다.The operation of the present invention in which the first and second dense wavelength division multiplexers (DWDMs) as shown in FIG. 6 are installed will be described in detail as follows.
제1도너부(100)에서 제1리모트부(200)로 송신 시, 도 4의 제1도너부(100)의 광분할다중기(WDM:Wavelength Division Multiplexer)(101)에서 선별된 송신광파장(1550nm)은 도 6의 제1도너부(100)와 양방향으로 연결된(a) 제1DWDM(Dense Wavelength Division Multiplexer)(600)의 제1WDM(WavelengthDivision Multiplexer)(601)으로 보내진다.When transmitting from the first donor part 100 to the first remote part 200, the transmission light wavelengths selected by the WDM (Wavelength Division Multiplexer) 101 of the first donor part 100 of FIG. 1550 nm is sent to a first Wavelength Division Multiplexer (WDM) 601 of a first Dense Wavelength Division Multiplexer (DWDM) 600 connected in both directions to the first donor unit 100 of FIG. 6.
상기 제1WDM(Wavelength Division Multiplexer)(601)으로 보내진 제1도너부(100)의 송신광파장(1550nm)은 제3필터부(602)를 거쳐 도 4의 제2도너부(400)와 양방향으로 연결되어(b) 상기 제2도너부(400)의 송수신광파장(1530nm,1510nm)과 제1도너부(100)의 송신광파장(1550nm)을 선별하는 제2WDM(Wavelength Division Multiplexer)(603)에서 선별되어 제3WDM(Wavelength Division Multiplexer)(604)으로 보내진다.The transmission light wavelength (1550 nm) of the first donor part 100 sent to the first wavelength division multiplexer (WDM) 601 is bidirectionally connected to the second donor part 400 of FIG. 4 through a third filter part 602. (B) a second wavelength division multiplexer (WDM) 603 that selects the transmission / reception wavelengths (1530 nm and 1510 nm) of the second donor part 400 and the transmission wavelengths (1550 nm) of the first donor part 100. A third WDM (Wavelength Division Multiplexer) 604 is sent.
상기 제3WDM(Wavelength Division Multiplexer)(604)에서 다시 선별된 상기 제1도너부(100)의 송신광파장(1550nm)은 양방향의 단일광선로(c,c')로 연결된 제2DWDM(Dense Wavelength Division Multiplexer)(700)의 제4WDM(Wavelength Division Multiplexer(704)로 보내진다.The transmission wavelength 1550 nm of the first donor unit 100 reselected by the third wavelength division multiplexer (604) 604 is connected to a second wavelength wave division division multiplexer connected by a single optical path (c, c ') in both directions. To the fourth Wavelength Division Multiplexer 704 of < RTI ID = 0.0 >
도 4의 제1리모트부(400)의 송수신 광파장(1310nm,1550nm)과 제2리모트부(500)의 송수신광파장(1530nm,1510nm)을 선별하는 제4WDM(Wavelength Division Multiplexer)(704)에서 선별된 상기 제1도너부(100)의 송신광파장(1550nm)은 도 4의 제2리모트부(500)와 양방향으로 연결(b')되며 제1리모트부(200)의 수신광파장(1550nm)과 제2리모트부(500)의 송수신광파장(1510nm,1530nm)을 선별하는 제5WDM(Wavelength Division Multiplexer)(705)에서 다시 선별되어 제6필터부(701)를 거쳐 제6WDM(Wavelength Division Multiplexer)(701)로 보내진다.Selected by a fourth wavelength division multiplexer (WDM) 704 that selects transmission and reception light wavelengths (1310 nm and 1550 nm) of the first remote unit 400 and transmission and reception light wavelengths (1530 nm and 1510 nm) of the second remote unit 500 of FIG. 4. The transmission light wavelength (1550 nm) of the first donor part 100 is bi-directionally connected to the second remote part 500 of FIG. 4 (b '), and the reception light wavelength (1550 nm) of the first remote part 200 and the second The 5th Wavelength Division Multiplexer (WDM) 705 that selects the transmission and reception wavelengths (1510nm and 1530nm) of the remote unit 500 is again selected and passed through the sixth filter unit 701 to the 6th Wavelength Division Multiplexer (WDM) 701. Is sent.
도 4의 제1리모트부(400)와 양방향으로 연결된(a') 상기 제6WDM(WavelengthDivision Multiplexer)(701)을 거친 상기 제1도너부(100)의 송신광파장(1550nm)은 상기 제1리모트부(200)의 광파장분할다중기(WDM:Wavelength Division Multiplexer)(201)에서 다시 선별되어 도 4의제1리모트부(200)로 수신된다.The transmission light wavelength (1550 nm) of the first donor part 100 that has passed through the sixth wavelength division multiplexer (WDM) 701 connected to the first remote part 400 of FIG. 4 (a ') is the first remote part. It is again selected by the Wavelength Division Multiplexer (WDM) 201 of 200 and received by the first remote unit 200 of FIG. 4.
또한, 제1리모트부(200)에서 제1도너부(100)로 송신 시에는 상기 제1도너부(100)에서 제1리모트부(200)로 송신하는 역방향으로 송신광파장(1310nm)을 전송하면 된다.In addition, when transmitting from the first remote unit 200 to the first donor unit 100, when the transmission light wavelength 1310 nm is transmitted in the reverse direction transmitted from the first donor unit 100 to the first remote unit 200. do.
도 6에서 제2도너부(400)에서 제2리모트부(500)로 송신 시, 도 4의 제2도너부(400)의 광파장분할기(WDM:Wavelength Division Multiplexer)를 거쳐 선별된 송신광파장(1530nm)은 상기 제2도너부(400)와 양방향으로 연결되며(b) 상기 제1도너부(100)의 송신광파장(1550nm)과 제2도너부(200)의 송수신 광파장(1530nm,1510nm)을 선별하는 제2WDM(Wavelength Division Multiplexer)(603)을 거쳐 상기 제1도너부(100)의 송수신광파장(1550nm,1310nm)과 상기 제2도너부(200)의 송수신 광파장(1530nm,1510nm)을 선별하는 제3WDM(Wavelength Division Multiplexer)(604)로 보내진다.In FIG. 6, when the second donor unit 400 transmits from the second donor unit 400 to the second remote unit 500, a transmission light wavelength (1530 nm) selected through a wavelength division multiplexer (WDM) of the second donor unit 400 of FIG. 4. ) Is bidirectionally connected to the second donor unit 400 (b) to select the transmission light wavelength (1550nm) of the first donor unit 100 and the transmission and reception light wavelengths (1530nm, 1510nm) of the second donor unit 200 A transmission / reception wavelength (1550 nm, 1310 nm) of the first donor part 100 and transmission / reception light wavelengths (1530 nm, 1510 nm) of the second donor part 200 through a second wavelength division multiplexer (603). 3 is sent to a Wavelength Division Multiplexer (WDM) 604.
상기 제3WDM(Wavelength Division Multiplexer)(604)에서 선별된 상기 제2도너부(400)의 송신광파장(1530nm)은 상기 제3WDM(Wavelength Division Multiplexer)(604)과 양방향의 단일광선로(c,c')로 연결된 제2DWDM(Dense Wavelength Division Multiplexer)(700)의 제4WDM(Wavelength Division Multiplexer)(704)으로 보내진다.The transmission light wavelength (1530 nm) of the second donor unit 400 selected by the third wavelength division multiplexer (604) 604 is a bidirectional single optical path (c, c) with the third wavelength division multiplexer (604). ') Is sent to a fourth Wavelength Division Multiplexer (WDM) 704 of a second Dense Wavelength Division Multiplexer (DWDM) 700.
상기 제4WDM(Wavelength Division Multiplexer)(704)에서 선별된 상기 제2도너부(400)의 송신광파장(1530nm)은 도 4의 제2리모트부(500)와 양방향으로 연결된(b') 제5WDM(Wavelength Division Multiplexer)(705)에서 선별되어 제2리모트부(500)로 보내진다.A transmission light wavelength (1530 nm) of the second donor unit 400 selected by the fourth wavelength division multiplexer (704) is connected to the second remote unit 500 of FIG. Waveform Division Multiplexer (705) is selected and sent to the second remote unit (500).
상기 제2리모트부(500)로 보내진 상기 제2도너부(400)의 송신광파장(1530nm)은 제2리모트부(500)의 광파장분할다중기(WDM:Wavelength Division Multiplexer)(501)에서 다시 선별되어 도 4의 제2리모트부(500)로 수신된다.The transmission light wavelength (1530 nm) of the second donor unit 400 sent to the second remote unit 500 is again selected by an optical wavelength division multiplexer (WDM) of the second remote unit 500. And is received by the second remote unit 500 of FIG. 4.
또한, 제2리모트부(500)에서 제2도너부(400)로 송신 시에도 상기 제2도너부(400)에서 제2리모트부(500)로 송신하는 역방향으로 송신광파장(1510nm)을 전송하면 된다.In addition, when transmitting from the second remote unit 500 to the second donor unit 400, the transmission wavelength 1515 nm is transmitted in the reverse direction of transmission from the second donor unit 400 to the second remote unit 500. do.
도 7은 본 발명에 따라 옵티컬 써큘레이터(Optical Circulator)가 설치된 제1 및 제2DWDM(Dense Wavelength Division Multiplexer) 블록 다이어그램이다.FIG. 7 is a first and second Dense Wavelength Division Multiplexer (DWDM) block diagrams in which an optical circulator is installed according to the present invention.
도 7에서는 3개의 입출력 포트를 가지는 옵티컬 써큘레이터(Optical Circulator)라는 방향소자가 설치되는데, 본 발명에서 상기 방향소자는 적어도 하나의 수신광파장과 하나의 송신광파장을 동일광파장으로 하여 송수신을 분리해서 방향을 결정한다.In FIG. 7, a direction element called an optical circulator having three input / output ports is installed. In the present invention, the direction element may be configured by separating transmission and reception using at least one reception wavelength and one transmission wavelength as the same wavelength. Determine.
도 7에서 제1DWDM(Dense Wavelength Division Multiplexer)(600)은 도 4의 제1도너부(100)와 양방향의 단일광선로로 연결되기(a)위한 제11WDM(Wavelength Division Multiplexer)(607)과, 도 4의 제2도너부(400)와 양방향의 단일광선로(b)로 연결되는 제12WDM(Wavelength Division Multiplexer)(609)과, 상기 제1도너부(100)의 송신광파장(1550nm)과 제2도너부(400)의 수신광파장(1530nm)을선별하는 제13WDM(Wavelength Division Multiplexer)(610)과, 제1도너부(100)의 수신광파장(1310nm)과 제2도너부(400)의 송신광파장(1310nm)을 동일파장(1310nm)으로 하여 송수신의 방향을 결정하는 방향소자 옵티컬 써큘레이터(Optical Circulator)(613)와, 제2DWDM(Dense Wavelength Division Multiplexer)(700)과 양방향의 단일광선로(c,c')로 연결되며 동일파장인 제1도너부(100)의 수신광파장(1310nm) 및 제2도너부(400)의 송신광파장(1310nm)과 제1도너부(100)의 송신파장(1550nm)과 제2도너부(400)의 수신파장(1530nm)을 선별하는 제14WDM(Wavelength Division Multiplexer)(611)과 적어도 하나 이상의 필터부(608,612)로 구성된다.In FIG. 7, the first Dense Wavelength Division Multiplexer (DWDM) 600 is an eleventh Wavelength Division Multiplexer 607 for connecting to the first donor unit 100 of FIG. A twelfth Wavelength Division Multiplexer (WDM) 609 connected to the second donor unit 400 of 4 and a bidirectional single optical line b, and a transmission light wavelength (1550 nm) and a second wavelength of the first donor unit 100. A thirteenth wavelength division multiplexer (WDM) 610 that selects a reception light wavelength (1530 nm) of the donor unit 400, a reception light wavelength 1310 nm of the first donor unit 100, and a transmission light wavelength of the second donor unit 400. Directional optical circulator 613 for determining the direction of transmission and reception with the same wavelength (1310nm) as the same wavelength (1310nm), and the second optical wavelength (DWDM) Dense Wavelength Division Multiplexer (700) (c ') and the same wavelength of the received light wavelength (1310nm) of the first donor unit 100 and the transmission light wavelength (1310nm) of the second donor unit 400 and the transmission wavelength (1550n) of the first donor unit 100 m) and a fourteenth Wavelength Division Multiplexer (WDM) 611 for selecting a reception wavelength (1530 nm) of the second donor unit 400 and at least one filter unit 608 and 612.
도 7의 제2DWDM(Dense Wavelength Division Multiplexer)(700)은 상기 제1DWDM(Dense Wavelength Division Multiplexer)(600)과 양방향의 단일광선로(c,c')로 연결되어 제1리모트부(200)의 수신광파장(1550nm)과 제2리모트부(500)의 송신광파장(1530nm)과 동일파장인 제2리모트부(500)의 송신광파장(1310nm) 및 제2리모트부(500)의 수신광파장(1310nm)을 선별하는 제15WDM(Wavelength Division Multiplexer)(710)과, 상기 제1리모트부(200)의 수신광파장(1550nm)과 제2리모트부(500)의 송신광파장(1530nm)을 선별하는 제16WDM(Wavelength Division Multiplexer)(711)과, 제2리모트부(500)와 양방향의 단일광선로(b')로 연결되는 제17WDM(Wavelength Division Multiplexer)(712)과, 제1리모트부(200)의 송신광파장(1310nm)과 제2리모트부(500)의 수신광파장(1310nm)을 동일파장(1310nm)으로 하여 송수신의 방향을 결정하는 방향소자 옵티컬 써큘레이터(Optical Circulator)(708)와, 도 4의 제1리모트부(200)와 단일광선로(a')로 연결되는 제18WDM(Wavelength Division Multiplexer)(707)과 적어도 하나 이상의 필터부(709,713)로 구성된다.7 is connected to the first wavelength division multiplexer (DWDM) 600 in a bidirectional single optical path (c, c ') of the first remote unit 200. Referring to FIG. Transmission light wavelength 1310 nm of the second remote part 500 and reception light wavelength 1310 nm of the second remote part 500 which are the same wavelength as the reception light wavelength 1550 nm and the transmission light wavelength 1530 nm of the second remote part 500. A 15th WDM (Wavelength Division Multiplexer) 710 for sorting the signal, and a 16WW (Wavelength) for sorting the reception light wavelength (1550 nm) of the first remote part 200 and the transmission light wavelength (1530 nm) of the second remote part 500. Division Multiplexer (711), 17th Wavelength Division Multiplexer (WDM) 712 connected to the second remote unit 500 in a bidirectional single optical line b ', and the transmission wavelength of the first remote unit 200. Directional element optical circulator that determines the direction of transmission and reception by using the received light wavelength (1310nm) of the 1310nm and the second remote unit 500 as the same wavelength (1310nm). 708, the 18th Wavelength Division Multiplexer (WDM) 707 and at least one filter unit 709 and 713 connected to the first remote unit 200 of FIG. 4 by a single optical line a '.
도 7에서와 같이 옵티컬 써큘레이터(Optical Circulator)가 설치된 제1 및 제2DWDM(Dense Wavelength Division Multiplexer)의 동작을 본 발명에 따라 상세히 설명하면 다음과 같다.As illustrated in FIG. 7, operations of the first and second dense wavelength division multiplexers (DWDMs) in which an optical circulator is installed are described in detail according to the present invention.
도 7에서, 제1리모트부(200)에서 제1도너부(100)로 송신 시, 도 4에서의 제1리모트부(200)의 송신광파장(1310nm)은 상기 제1리모트부(200)의 광파장분할다중기(WDM:Wavelength Division Multiplexer)(201)에서 선별되어 단일광선로로(a')를 통해 제2DWDM(Dense Wavelength Division Multiplexer)(700)의 제18WDM(Wavelength Division Multiplexer)(707)으로 보내져 선별된다.In FIG. 7, when the first remote unit 200 transmits from the first remote unit 200 to the first donor unit 100, the transmission light wavelength 1310 nm of the first remote unit 200 in FIG. 4 is determined by the first remote unit 200. Selected from the WDM (Wavelength Division Multiplexer) 201 and sent to the 18th Wavelength Division Multiplexer (WDM) 707 of the second Dense Wavelength Division Multiplexer (DWDM) 700 through a single optical path (a ') Selected.
상기 제18WDM(Wavelength Division Multiplexer)(707)을 통과한 수신파장(1310nm)은 옵티컬 써큘레이터(Optical Circulator)(708)에 의해 제9필터부(709)로 보내지고, 상기 제9필터부(709)를 거친 상기 제1리모트부(200)의 송신광파장(1310nm)은 제15WDM(Wavelength Division Multiplexer)(710)으로 보내져 선별된다.The reception wavelength 1310 nm passing through the eighteenth Wavelength Division Multiplexer (WDM) 707 is sent to the ninth filter unit 709 by an optical circulator 708 and the ninth filter unit 709. The transmission light wavelength (1310 nm) of the first remote unit 200 that passes through the () is sent to the 15th Wavelength Division Multiplexer (WDM) 710 to select.
상기 제15WDM(Wavelength Division Multiplexer)(710)에서 선별된 제1리모트부(200)의 송신광파장(1310nm)은 상기 제15WDM(Wavelength Division Multiplexer)(710)과 연결된(c,c,) 제1DWDM(Dense Wavelength Division Multiplexer)(600)의 제14WDM(Wavelength Division Multiplexer)(611)으로 보내진다.The transmission light wavelength 1310 nm of the first remote unit 200 selected by the 15th WDM (Wavelength Division Multiplexer) 710 is connected to the 15th WDM (Wavelength Division Multiplexer) 710 (c, c,) It is sent to the 14th Wavelength Division Multiplexer (WDM) 611 of the Dense Wavelength Division Multiplexer (600).
상기 제14WDM(Wavelength Division Multiplexer)(611)에서 선별된 제1리모트부(200) 수신광파장(1310nm)은 제7필터부(612)를 거쳐 옵티컬 써큘레이터(Optical Circulator)(613)로 보내지고, 상기 옵티컬 써큘레이터(Optical Circulator)(613)에 의해 제11WDM(Wavelength Division Multiplexer)(607)로 보내진다.The received light wavelength 1310 nm of the first remote unit 200 selected by the 14th WDM (Wavelength Division Multiplexer) 611 is sent to the optical circulator 613 through the seventh filter unit 612. The optical circulator 613 is sent to the eleventh WDM (Wavelength Division Multiplexer) 607.
상기 제11WDM(Wavelength Division Multiplexer)(607)에서 선별된 제1리모트부(200) 수신광파장(1310nm)은 상기 제11WDM(Wavelength Division Multiplexer)(607)과 연결된(a) 도 4의 제1도너부(100)의 광파장분할다중기(WDM:Wavelength Division Multiplexer)(101)를 거쳐 선별되어 제1도너부(100)로 수신된다.The first remote part 200 received by the eleventh WDM (Wavelength Division Multiplexer) 607 (1310 nm) is connected to the eleventh WDM (Wavelength Division Multiplexer) 607 (a) the first donor part of FIG. Selected via the WDM (Wavelength Division Multiplexer) 101 of the 100 is received by the first donor unit (100).
도 7에서, 도 4의 제1도너부(100)가 제1리모트부(200)로 수신시에는 제1도너부(100)의 광파장분할다중기(WDM:Wavelength Division Multiplexer)(101)에서 선별된 수신광파장(1550nm)이 상기 제1도너부(100)와 연결된(a) 제1DWDM(Dense Wavelength Division Multiplexer)(600)의 제11WDM(Wavelength Division Multiplexer)(607)에 의해 제8필터부(608)를 통과하여 제13WDM(Wavelength Division Multiplexer)(610)으로 보내진다.In FIG. 7, when the first donor unit 100 of FIG. 4 is received by the first remote unit 200, the first donor unit 100 is selected by a wavelength division multiplexer (WDM) 101 of the first donor unit 100. The eighth filter unit 608 by the eleventh wavelength division multiplexer (60 WDM) 607 of the first dense wavelength division multiplexer (DWDM) 600 connected to the first donor unit 100 (a). Is sent to the 13th Wavelength Division Multiplexer (WDM) 610.
상기 제13WDM(Wavelength Division Multiplexer)(610)에서 선별된 상기 제1도너부(100)의 수신광파장(1550nm)은 제14WDM(Wavelength Division Multiplexer)(611)에서 다시 선별되어, 상기 제14WDM(Wavelength Division Multiplexer)(611)과 연결된(c, c') 제2DWDM(Dense Wavelength DivisionMultiplexer)(700)의 제15WDM(Wavelength Division Multiplexer)(710)에 보내진다.The received light wavelength (1550 nm) of the first donor unit 100 selected by the 13th WDM (Wavelength Division Multiplexer) 610 is again selected by the 14th WDM (Wavelength Division Multiplexer) 611, and the 14th WDM (Wavelength Division) It is sent to a 15th Wavelength Division Multiplexer (WDM) 710 of a second Dense Wavelength Division Multiplexer (DWDM) 700 connected to (c, c ') a Multiplexer (611).
상기 제15WDM(Wavelength Division Multiplexer)(710)에서 선별된 제1도너부(100)의 수신광파장(1550nm)은 제16WDM(Wavelength Division Multiplexer)(711)에서 선별되어 제10필터부(713)를 거쳐 도 4의 제1리모트부(200)와 연결된(a') 제18WDM(Wavelength Division Multiplexer)(707)를 거쳐 제1리모트부(200)로 수신된다.The received light wavelength (1550 nm) of the first donor part 100 selected by the fifteenth WDM (Wavelength Division Multiplexer) 710 is selected by the sixteenth WDM (Wavelength Division Multiplexer) 711 and passes through the tenth filter part 713. It is received by the first remote unit 200 via an 18th Wavelength Division Multiplexer (WDM) 707 connected to (a ') the first remote unit 200 of FIG. 4.
상기 제1도너부(100)의 수신광파장(1550nm)은 제1리모트부(200)의 광파장분할다중기(WDM:Wavelength Division Multiplexer)(201)에서 다시 선별되어 상기 제1리모트부(200)로 수신된다.The reception light wavelength (1550 nm) of the first donor part 100 is again selected by a wavelength division multiplexer (WDM) 201 of the first remote part 200 to the first remote part 200. Is received.
도 7에서 제2도너부(400)에서 제2리모트부(500)으로 송신 시, 도 4의 제2도너부(400)의 광파장분할다중기(WDM:Wavelength Division Multiplexer)(401)에서 선별된 수신파장(1310nm)은 옵티컬 써큘레이터(Optical Circulator)(613)로 보내진다,In FIG. 7, when the second donor unit 400 transmits from the second donor unit 400 to the second remote unit 500, a WDM (Wavelength Division Multiplexer) 401 of the second donor unit 400 of FIG. 4 is selected. Receive wavelength 1310nm is sent to the optical circulator 613,
상기 제2도너부(400)의 수신광파장(1310nm)은 상기 옵티컬 써큘레이터(Optical Circulator)(613)에 의해 제7필터부(612)를 거쳐 제14WDM(Wavelength Division Multiplexer)(611)으로 보내져 선별된다.The received light wavelength (1310 nm) of the second donor unit 400 is sent to the 14th Wavelength Division Multiplexer (611) by the optical circulator 613 through the seventh filter unit 612 for selection. do.
상기 제14WDM(Wavelength Division Multiplexer)(611)에서 선별된 상기 제2도너부(400)의 수신광파장(1310nm)은 상기 14WDM(Wavelength Division Multiplexer)와 연결된(c,c') 제2DWDM(Dense Wavelength Division Multiplexer)(700)의 제15WDM(Wavelength Division Multiplexer)(710)으로 보내져선별되어 제9필터부(709)를 통과한다.The received light wavelength 1310 nm of the second donor unit 400 selected by the 14th WDM (Wavelength Division Multiplexer) 611 is connected to the 14 WDM (Wavelength Division Multiplexer) (c, c ′) and a second DWDM (Dense Wavelength Division) It is sent to the 15th Wavelength Division Multiplexer (WDM) 710 of the Multiplexer (700) and passed through the ninth filter unit (709).
상기 제9필터부(709)로 통과한 제2도너부(400)의 수신광파장(1310nm)은 옵티컬 써큘레이터(Optical Circulator)(708)에 의해 제17WDM(Wavelength Division Multiplexer)(712)로 보내진다.The reception light wavelength 1310 nm of the second donor unit 400 passing through the ninth filter unit 709 is sent to the 17th Wavelength Division Multiplexer (WDM) 712 by an optical circulator 708. .
상기 제2도너부(400)의 수신광파장(1310nm)은 제17WDM(Wavelength Division Multiplexer)(712)와 단일광선로(b')로 연결된 도 4의 제2리모트부(500)의 광분할다중기(WDM:Wavelength Division Multiplexer)(501)에서 다시 선별되어 제2리모트부(500)로 수신된다.The received light wavelength 1310 nm of the second donor part 400 is a light splitting multiplex of the second remote part 500 of FIG. 4 connected to a 17th wavelength division multiplexer (WDM) 712 by a single optical line b '. It is again selected by the Wavelength Division Multiplexer (WDM) 501 and received by the second remote unit 500.
도 7에서, 제2리모트부(500)에서 제2도너부(400)로 수신 시에는 도 4의 제2리모트(500)의 광파장분할다중기(WDM:Wavelength Division Multiplexer)(501)에서 선별된 수신광파장(1530nm)이 상기 제2리모트부(400)와 연결된(b') 제2DWDM(Dense Wavelength Division Multiplexer)(700)의 제17WDM(Wavelength Division Multiplexer)(712)에 의해 제16WDM(Wavelength Division Multiplexer)(711)을 거쳐 제15WDM(Wavelength Division Multiplexer)(710)으로 보내져 선별된다.In FIG. 7, when received from the second remote unit 500 to the second donor unit 400, the wavelength division multiplexer (WDM) 501 of the second remote 500 of FIG. 4 is selected. A sixteenth Wavelength Division Multiplexer (WDM) is coupled by a seventeenth Wavelength Division Multiplexer (WDM) 712 of a second Dense Wavelength Division Multiplexer (DWDM) 700 connected to a second remote unit 400 (b '). 711 is sent to the 15th Wavelength Division Multiplexer (WDM) 710 for selection.
상기 제2리모트(500)의 수신광파장(1530nm)은 제1DWDM(Dense Wavelength Division Multiplexer)(600)의 제14WDM(Wavelength Division Multiplexer)(611)와 연결된(c,c') 상기 제15WDM(Wavelength Division Multiplexer)(710)에서 제1DWDM(Dense Wavelength Division Multiplexer)(600)의 제14WDM(Wavelength Division Multiplexer)(611)에 보내져 선별되고, 다시 제13WDM(Wavelength Division Multiplexer)(610)으로 보내져 선별된 상기 제2리모트(500)의수신광파장(1530nm)은 도 4의 제2도너부(400)와 연결된(b) 제12WDM(Wavelength Division Multiplexer)(609)로 보내져 제2도너부(400)에 수신된다.The received light wavelength (1530 nm) of the second remote 500 is connected to (c, c ') the 14th Wavelength Division Multiplexer (611) of the first Dense Wavelength Division Multiplexer (DWDM) 600 (c, c') and the 15th Wavelength Division The Multiplexer (710) is sent to the 14th Wavelength Division Multiplexer (WDM) 611 of the first Dense Wavelength Division Multiplexer (DWDM) 600 to be selected and sent back to the 13th Wavelength Division Multiplexer (610) (WDM) 610 to select The received light wavelength (1530 nm) of the second remote 500 is sent to the twelfth Wavelength Division Multiplexer (WDM) 609 connected to the second donor unit 400 of FIG. 4 and received by the second donor unit 400.
상기 제2리모트(500)의 수신광파장(1530nm)은 제2도너부(400)의 광파장분할기(WDM:Wavelength Division Multiplexer)(401)에 다시 선별되어 도 4의 제2도너부(400)에 수신된다.The received light wavelength (1530 nm) of the second remote 500 is reselected by a wavelength division multiplexer (WDM) 401 of the second donor unit 400 and received by the second donor unit 400 of FIG. 4. do.
도 8은 본 발명에 따라 옵티컬 써큘레이터(Optical Circulator)가 두개가 설치된 제1 및 제2DWDM(Dense Wavelength Division Multiplexer) 블록 다이어그램으로, 도 7과 같은 구성에 옵티컬 써큘레이터(Optical Circulator)가 더 추가됨으로 해서 또 다른 이동통신 서비스가 추가된 구성도이다.FIG. 8 is a first and second DWDM (Dense Wavelength Division Multiplexer) block diagrams in which two optical circulators are installed according to the present invention, and an optical circulator is further added to the configuration as shown in FIG. 7. Thus, another mobile communication service is added.
도 8과 같이, 두 개의 옵티컬 써큘레이터(Optical Circulator)가 설치될 때에는 동일의 송수신 광파장이 두 개가 있어야 한다.As shown in FIG. 8, when two optical circulators are installed, there should be two identical transmit / receive optical wavelengths.
상기와 같은 본 발명은 하나의 광선로에 옵티컬 써큘레이터(Optical Circulator)를 추가 설치하여 3개 이상의 서비스 장비를 운용할 수 있다.In the present invention as described above, an optical circulator may be additionally installed in one optical path to operate three or more service equipments.
따라서, 본 발명에 의하면, 단일섬유를 이용한 다중다파 하이브리드(Hybrid)광 전송방식은 기존에 사용하지 않은 광파장을 사용하여 추가되는 서비스 방식의 광중계장치를 설치 및 서비스할 수 있는 방식으로, 즉 기존에 사용하고 있는 하나의 광선로를 이용하여 두가지 이상의 서비스를 구현할 수 있는 효과가 있다.Therefore, according to the present invention, the multi-wave hybrid hybrid transmission method using a single fiber is a method that can install and service an optical relay device of a service method added by using an optical wavelength that has not been previously used, that is, existing There is an effect that more than one service can be implemented by using one optical fiber line.
Claims (5)
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| KR20030065234A (en) * | 2002-01-31 | 2003-08-06 | 필아이티 주식회사 | Transmission line of W-LAN |
| KR100630049B1 (en) * | 2002-03-21 | 2006-09-27 | 삼성전자주식회사 | Wavelength division multiplexing passive optical network system |
| KR100833105B1 (en) * | 2006-10-16 | 2008-05-28 | 에스인포텍(주) | A optical line sharing system and a transmission/receipt method of optical signals using as same |
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| KR100630049B1 (en) * | 2002-03-21 | 2006-09-27 | 삼성전자주식회사 | Wavelength division multiplexing passive optical network system |
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