WO2012102557A2 - Système de réseau optique entre terminaux de ligne optique dans réseau optique passif à répartition temporelle - Google Patents

Système de réseau optique entre terminaux de ligne optique dans réseau optique passif à répartition temporelle Download PDF

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Publication number
WO2012102557A2
WO2012102557A2 PCT/KR2012/000613 KR2012000613W WO2012102557A2 WO 2012102557 A2 WO2012102557 A2 WO 2012102557A2 KR 2012000613 W KR2012000613 W KR 2012000613W WO 2012102557 A2 WO2012102557 A2 WO 2012102557A2
Authority
WO
WIPO (PCT)
Prior art keywords
optical
optical fiber
communication channel
wavelength
multiplexing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2012/000613
Other languages
English (en)
Korean (ko)
Other versions
WO2012102557A3 (fr
Inventor
조원국
양광진
조주철
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OPTOWIZ CO Ltd
Original Assignee
OPTOWIZ CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020120006707A external-priority patent/KR101357996B1/ko
Application filed by OPTOWIZ CO Ltd filed Critical OPTOWIZ CO Ltd
Publication of WO2012102557A2 publication Critical patent/WO2012102557A2/fr
Publication of WO2012102557A3 publication Critical patent/WO2012102557A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0279—WDM point-to-point architectures
    • 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
    • H04B10/2589—Bidirectional transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0282—WDM tree architectures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J2014/0253—Allocation of downstream wavelengths for upstream transmission

Definitions

  • the present invention provides an optical line termination device in a time division passive optical network.
  • OLT Termination, hereinafter referred to as OLT
  • OLT a communication channel between OLTs existing in one of a plurality of optical subscriber networks constituting a time division passive optical communication network system.
  • the present invention relates to an optical network system that provides a more economical and efficient optical network environment between OLTs by being formed based on Wavelength Division Multiplexing.
  • PON Passive Optical Network
  • OSP OutSide Plant
  • PON offers fiber-based high-speed services to businesses, SOHO and homes.
  • a splitter is used to allow a single OLT to connect a subscriber network (optical network unit).
  • [5] ⁇ systems typically include Giga-bit Passive Optical Network (GPON)
  • EPON IEEE 802.3 Ethernet Passive Optical Network
  • ITU International Telecommunication Union
  • FIG. 1 illustrates a configuration of one optical subscriber network in a multiplexing-PON (hereinafter, referred to as a 'TDM-PON').
  • the TDM-PON according to the prior art has a light path on the side of a national company.
  • the fiber optic termination device (10) includes TI) M-PON MAC & PHY modules (11) and TDM-PON
  • An optical transceiver (TDM-PON TR BMR ) 12 is made up of TDM-PON ONT 20, which consists of a TDM-PON MAC & PHY module 21 and a TDM-PON optical transceiver (TDM-PON TR BMT ) 22.
  • the TDM-PON is a structure in which a plurality of subscriber-side optical line subscriber devices 20 share an optical fiber with an optical fiber termination device 10 on the domestic side by using a time division technique, and B-PON standardized in ITU-T. And G-PON, and the E-PON standardized by the IEEE are currently in use.
  • the optical fiber terminator 10 broadcasts the traffic transmitted to each optical fiber subscriber device 20, and remotely.
  • ⁇ splitters 30 are provided to split the optical power, and distribute the downlink signals received from the optical line terminating device 10 to N subscriber lines, and receive the down signal received from the optical line subscriber device 20 to itself. Only the frames that are timed to them are selectively delivered to subscribers.
  • the optical line subscriber device 20 Refer 11] Looking at the point of view of the upstream signal, the optical line subscriber device 20
  • TDM-PON Optical Transceiver TDM-PON Optical Transceiver
  • TDM-PON optical transceiver 22 of the optical subscriber unit 20 is equipped with a burst mode transmission (TR BMT ) transceiver with burst. -mode transmitter).
  • TR BMT burst mode transmission
  • the TDM-PON optical transmitter 12 of the optical fiber terminator 10 has a burst mode receiving function in order to support the uplink signal having the burst mode characteristics. It is implemented as a fully equipped optical transceiver (TR BMi ) with a burst-mode receiver.
  • a fixed wavelength light source of 1480 nm to 1500 nm band is normally used for the optical fiber terminating device 10
  • a fixed wavelength light source of 1260 nm to 1360 nm band is used for the optical line subscriber device 20.
  • the standardization mechanism for the next-generation TDM-PON discusses the possibility of changing the uplink wavelength and the downlink wavelength, and measures for increasing the bandwidth by distributing the downlink signal to multiple wavelength optical transmitters.
  • optical network configuration is divided into two.
  • OLTs optical line termination devices
  • ONU optical fiber subscriber equipment
  • each communication channel Point-to-Point type structure is connected, and the optical network configuration between one optical line terminator (OLT) and multiple optical subscriber units (ONU) in the optical subscriber network is point-to-point. to-Multi-Point) structure.
  • the present invention provides a wavelength division multiplexing scheme in which optical fiber termination devices (OLTs), one for each optical subscriber network constituting a time division passive optical communication network system, form a communication channel with each other. It is configured to be formed on the basis of.
  • OLTs optical fiber termination devices
  • the aim is to provide an optical network system between optical fiber end devices that provides a more economical and efficient optical network environment between optical fiber ⁇ end devices (OLTs). .
  • an optical network system between optical fiber termination devices in a time division passive optical communication network exists in a first optical subscriber network in a time division passive optical communication network having a plurality of optical subscriber networks.
  • First ray termination device A second optical fiber terminal device present in the second optical subscriber network; Receives transmission signals having a transmission wavelength preset for each communication channel from a plurality of communication channels of the first optical fiber terminal device, multiplies the received plurality of transmission signals, and transmits them on one optical cable;
  • a first multiplexing and demultiplexing device for demultiplexing a reception signal received through the one optical cable and transmitting a signal corresponding to a reception wavelength of each communication channel to each communication channel of the first optical fiber terminal; And receiving the multiplexed signal transmitted by the first multiplexing / demultiplexing device through the one optical cable, and demultiplexing the received signal to each communication channel of the second optical fiber termination device.
  • the first optical fiber terminal device and the second optical fiber cable terminal device include a plurality of optical transceivers forming a communication channel, and the optical transceiver includes CWDM (Coarse Wavelength). Division Multiplexing) A bidirectional optical transmitter and receiver that forms a communication channel in which the transmission signal and the reception signal have different wavelengths.
  • CWDM Coarse Wavelength). Division Multiplexing
  • the first optical fiber terminal device and the low] two optical fiber terminal device includes a plurality of optical transceivers forming a communication channel, wherein the optical transmitter, It is a CWDM (Coarse Wavelength Division Multiplexing) communication channel and a bidirectional optical transmitter / receiver that forms a communication channel in which a transmission signal and a reception signal have the same wavelength.
  • the optical transmitter It is a CWDM (Coarse Wavelength Division Multiplexing) communication channel and a bidirectional optical transmitter / receiver that forms a communication channel in which a transmission signal and a reception signal have the same wavelength.
  • CWDM Coarse Wavelength Division Multiplexing
  • the first multiplexing and demultiplexing apparatus and the second multiplexing and demultiplexing apparatus may be configured by using a thin film filter.
  • the first multiplexing and demultiplexing apparatus and the second multiplexing and demultiplexing apparatus may be configured of an arrayed waveguide grating (AWG).
  • AWG arrayed waveguide grating
  • a plurality of communication channels between optical fiber termination devices in a time division passive optical communication network can be connected to each other through a single optical cable. Therefore, the cost of embedding optical cables is reduced compared to forming an optical network one-to-one using optical cables by the number of communication channels.
  • a plurality of communication channels are provided through one optical cable. Increases efficiency by enabling connectivity.
  • Multiplexing-PON is a view showing the configuration of one optical subscriber network.
  • FIG. 2 is a diagram illustrating an optical network system between an optical line termination device (OLT) according to a first embodiment of the present invention.
  • OLT optical line termination device
  • FIG 3 is a diagram illustrating an optical network system between an optical path terminating apparatus (OLT) according to a second embodiment of the present invention.
  • OLT optical path terminating apparatus
  • FIG. 2 is a diagram illustrating an optical network system between an optical line termination device (OLT) according to a first embodiment of the present invention.
  • OLT optical line termination device
  • first, optical transmitters in which the first optical fiber terminal 100 and the second optical fiber terminal 200 form a communication channel therebetween.
  • Optical receiver, .. ninth optical transmitter) CWDM (Coarse Wavelength Division) Multiplexing) is shown with two-way optical transceivers forming a communication channel.
  • the wavelength of CWDM is about 20nm between 1270nm and 1610nm.
  • the optical fiber terminator (OLT) 100,200 communicates with CWDM.
  • the optical path terminators 100 and 200 have a maximum of 9 Communication channels can be formed.
  • the first multiplexing / demultiplexing apparatus 300 receives transmission signals having a predetermined unique transmission wavelength for each communication channel from up to nine communication channels of the first optical fiber terminal 100.
  • the plurality of transmission signals are wavelength-division multiplexed and then transmitted through one optical cable.
  • the second multiplexing / demultiplexing apparatus 400 provides a low U through the one optical cable.
  • the second multiplexing / demultiplexing apparatus 400 receives transmission signals having a predetermined unique transmission wavelength for each communication channel from up to nine communication channels of the second optical fiber terminal 200.
  • the plurality of transmission signals are wavelength-division multiplexed and then transmitted through one optical cable.
  • the first multiplexing / demultiplexing device 300 is connected to the low-frequency cable via the optical cable.
  • the multiplexing / demultiplexing apparatus 400 may have a configuration including an arrayed waveguide grating (AWG), thereby minimizing the cost of a light source when forming an optical network.
  • ABG arrayed waveguide grating
  • the device 400 is equipped with a thin film filter to perform multiplexing / demultiplexing. It is desirable to have a configuration to perform.
  • optical transceivers are configured to have a transmission speed of 1.25Gbps or 2.5Gbps, and the present invention can be applied to both GPON and EPON, which are time division passive optical communication networks.
  • optical fiber terminators 100,200 and
  • the optical path subscriber device (ONU) (not shown) communicates with a wavelength of 1490 nm as the downlink signal and 1310 nm as the wavelength of the uplink signal. Therefore, the optical fiber termination device (OLT) 100,200 is configured to have a wavelength converter (not shown), so that the optical network system between the optical fiber termination device (OLT) 100,200 according to the present invention is a conventional time division passive type. It can be configured to be applied to the optical network system as it is.
  • the wavelength converter (not shown) in the optical fiber terminator (OLT) 100,200 is an optical / electric / optical light.
  • the wavelength conversion unit (not shown) converts only the wavelength of the received optical signal and retransmits it, the 2R method of changing and retransmitting the wavelength and signal type at the same time, and the wavelength, signal type and timing at the same time. Configurable in 3R mode to change and retransmit.
  • the wavelength conversion unit (not shown) be configured in a 2R or 3R scheme which is mainly used.
  • the present invention terminates the first optical path in a time division passive optical communication network.
  • a plurality of communication channels between the device 100 and the second optical fiber termination device 200 enables connection with each other via a single optical cable. Therefore, the cost of laying the optical cable is reduced compared to forming the optical network in a one-to-one manner by using the optical cable by the number of communication channels. In addition, in terms of optical cable usage, it is possible to increase the efficiency by allowing a plurality of communication channels to be connected through a single optical cable between optical fiber termination devices.
  • FIG 3 is a diagram illustrating an optical network system between an optical line termination device (OLT) according to a second embodiment of the present invention.
  • OLT optical line termination device
  • the optical fiber terminators (OLTs) 100 and 200 have the same bidirectional optical transceivers forming a CWDM communication channel.
  • the optical transmitters (first optical receiver, second optical receiver, .. 18th optical receiver) provided in the optical path terminator (OLT) 100,200 of FIG. 3 have the same wavelength as the transmission signal and the reception signal.
  • the branch is characterized by forming a communication channel.
  • an optical transmitter that forms a CWDM communication channel and uses the same wavelength in a transmission signal and a reception signal will be referred to as a CWDM same wavelength bidirectional optical transmitter.
  • the CWDM co-wavelength optical transceiver uses the straightness of light to separate the transmission signal and the reception signal, so the reflection loss should be minimized when connecting the connector to the outside.
  • CWDM equal wavelength bidirectionality in optical fiber termination (OLT) 100,200 If you have an optical transceiver, it is recommended that you use the APC (Angled Physical Contact) type.
  • the optical fiber terminator (OLT) 10Q, 200 is equipped with a CWDM co-wavelength bidirectional optical transceiver to provide the first optical fiber terminator 100 and the low twelve optical fiber terminator 200.
  • the first and second optical fiber terminators 100,200 can be configured to use up to 18 communication channels.
  • the function of the device 400 is as described above with reference to Fig. 2, except that the number of communication channels connected to the first and second optical fiber terminators 100 and 200 extends from 9 to 18 at most.
  • an optical transceiver allows an optical fiber terminator (OLT) to have more communication channels, and the present invention communicates in the formation of an optical network between optical cable terminators (OLTs), even though the communication channel of the optical fiber terminators (OLTs) increases.
  • the optical cable is not required as many as the number of channels, and one optical cable is used to form the optical network.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Communication System (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

La présente invention concerne un système de réseau optique entre des terminaux de ligne optique dans un réseau optique passif à répartition temporelle. La présente invention consiste à former un réseau optique entre des terminaux de ligne optique (OLT), dont l'un existe dans chaque réseau optique de multiples membres constitués d'un réseau optique passif à répartition temporelle, sur la base d'un multiplexage par répartition en longueur d'onde. Selon l'invention, des conditions de réseau optique plus économiques et efficaces sont assurées entre des terminaux de ligne optique dans un réseau optique passif à répartition temporelle.
PCT/KR2012/000613 2011-01-26 2012-01-26 Système de réseau optique entre terminaux de ligne optique dans réseau optique passif à répartition temporelle Ceased WO2012102557A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20110007955 2011-01-26
KR10-2011-0007955 2011-01-26
KR1020120006707A KR101357996B1 (ko) 2011-01-26 2012-01-20 시분할 수동형 광통신망에서 광선로 종단 장치 간에 광 네트워크 시스템
KR10-2012-0006707 2012-01-20

Publications (2)

Publication Number Publication Date
WO2012102557A2 true WO2012102557A2 (fr) 2012-08-02
WO2012102557A3 WO2012102557A3 (fr) 2012-11-29

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PCT/KR2012/000613 Ceased WO2012102557A2 (fr) 2011-01-26 2012-01-26 Système de réseau optique entre terminaux de ligne optique dans réseau optique passif à répartition temporelle

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5202782A (en) * 1990-01-19 1993-04-13 Canon Kabushiki Kaisha Optical communication method and optical communication system
JP3055603B2 (ja) * 1996-07-19 2000-06-26 日本電気株式会社 光ネットワーク
JP2001313660A (ja) * 2000-02-21 2001-11-09 Nippon Telegr & Teleph Corp <Ntt> 波長多重光ネットワーク
KR100895482B1 (ko) * 2007-06-13 2009-05-06 한국과학기술원 저가격 파장분할다중방식 수동형 광가입자망

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