WO2009122577A1 - Système de communication optique, station maîtresse, et station asservie - Google Patents

Système de communication optique, station maîtresse, et station asservie Download PDF

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Publication number
WO2009122577A1
WO2009122577A1 PCT/JP2008/056596 JP2008056596W WO2009122577A1 WO 2009122577 A1 WO2009122577 A1 WO 2009122577A1 JP 2008056596 W JP2008056596 W JP 2008056596W WO 2009122577 A1 WO2009122577 A1 WO 2009122577A1
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WO
WIPO (PCT)
Prior art keywords
station device
wavelength
optical
signal
slave station
Prior art date
Application number
PCT/JP2008/056596
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English (en)
Japanese (ja)
Inventor
聡 吉間
巨生 鈴木
Original Assignee
三菱電機株式会社
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
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2008/056596 priority Critical patent/WO2009122577A1/fr
Publication of WO2009122577A1 publication Critical patent/WO2009122577A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0226—Fixed carrier allocation, e.g. according to service
    • 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
    • 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
    • H04J14/0245—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU
    • H04J14/0246—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU using one wavelength per ONU
    • 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
    • H04J14/0249—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU
    • H04J14/025—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU using one wavelength per ONU, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
    • 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

Definitions

  • the present invention relates to an optical communication system for simultaneously transmitting optical signals of a plurality of wavelengths by wavelength division multiplexing.
  • wavelength division multiplexing passive optical network As one of optical networks for realizing optical communication.
  • one master station device OLT: Optical Line Terminal
  • ONU Optical Network Unit
  • Non-Patent Document 1 in a wavelength division multiplexing passive optical network, in order to realize single-core bidirectional communication, an arrayed waveguide grating is connected to a remote node installed between a master station device and each slave station device.
  • AWG Arrayed Waveguide Grating
  • FSR Free Spectral Range
  • the wavelength (band) of the uplink signal and the downlink signal is exclusively assigned to each slave station device, and therefore, the bandwidth is time-divided into a plurality of slave station devices.
  • the bandwidth of upstream and downstream signals is not limited even when the number of users increases.
  • an arrayed waveguide grating is used as a remote node, and a smaller number of slave station devices than the number of output ports of the arrayed waveguide grating and one parent station device are used. Perform bidirectional communication.
  • this method only one wavelength can be assigned to each slave station device for transmission of the downlink signal, so when a plurality of different types of downlink signals are transmitted simultaneously, the bandwidth allocated to each signal is limited. There was a problem of being.
  • the 1550 nm band is defined in the standardization standard (IEEE 802.3-2005) as a band for video distribution.
  • the present invention has been made in view of the above, and an optical communication system capable of simultaneously transmitting downlink signals of two or more wavelengths from a master station apparatus to one slave station apparatus by applying a wavelength division multiplexing system,
  • An object is to obtain a master station device and a slave station device constituting the same.
  • an optical communication system uses a single master station device, a plurality of slave station devices accommodated in the master station device, and an AWG.
  • a remote node that demultiplexes the optical signal transmitted from the master station device to each of the slave station devices and multiplexes the optical signal transmitted from each of the slave station devices to the master station device.
  • the master station device has a wavelength determined in advance based on the FSR of the AWG as a downlink signal to be transmitted to each of the slave station devices, and different wavelengths transmitted to the same slave station device.
  • the plurality of optical signals are generated for each slave station device.
  • the optical communication system uses an arrayed waveguide grating (AWC) as a remote node, and the master station device transmits a plurality of optical signals at wavelengths considering the wavelength period of the arrayed waveguide grating to each slave station device. Since the signal is transmitted, even if the number of users (slave station devices) increases, both the upstream and downstream signals are not subject to bandwidth limitations, and a wider bandwidth is available compared to the prior art. There exists an effect that it can allocate with respect to a station apparatus.
  • AWC arrayed waveguide grating
  • each slave station device since only the downstream signal that should be received by the connected slave station device flows through the transmission path between each slave station device and the remote node, each slave station device has a wavelength that it should receive. There is no need to provide a wavelength selection filter for extracting only the first signal, and the cost of the slave station apparatus can be reduced.
  • FIG. 1 is a diagram illustrating a configuration example of the optical communication system according to the first embodiment.
  • FIG. 2 is a diagram illustrating a configuration example of a transmission processing unit included in the master station device.
  • FIG. 3 is a diagram illustrating a configuration example of a reception processing unit included in the master station device.
  • FIG. 4 is a diagram illustrating an example of a wavelength arrangement of an optical signal used in the optical communication system according to the first embodiment.
  • FIG. 5 is a diagram illustrating a configuration example of the optical communication system according to the second embodiment.
  • FIG. 1 is a diagram illustrating a configuration example of a first embodiment of an optical communication system according to the present invention.
  • This optical communication system is composed of a master station device (OLT) 10, a remote node (RN) 20, and a plurality of slave station devices (ONU) 30 accommodated in the master station device 10, and the master station device 10 and each slave device.
  • Each of the station devices 30 is connected to the remote node 20 via a single optical fiber.
  • Each slave station device 30 has the same configuration. Further, in the following description, when a specific slave station device is described, the slave station devices # 1, # 2,.
  • the master station device 10 includes a transmission processing unit (Tx) 11, a reception processing unit (Rx) 12, and a multiplexing / demultiplexing unit 13.
  • the transmission processing unit 11 modulates a plurality of lights having different wavelengths allocated for downlink data transmission with different electrical signals, and generates a plurality of downlink optical signals.
  • the reception processing unit 12 demultiplexes a plurality of wavelength-division multiplexed upstream optical signals that are input signals, and demodulates the separated optical signals as different electrical signals.
  • the multiplexing / demultiplexing unit 13 separates the downstream optical signal and the upstream optical signal.
  • the multiplexing / demultiplexing unit 13 can be realized by using, for example, a wavelength division multiplexing (WDM) filter.
  • WDM wavelength division multiplexing
  • the remote node 20 is composed of an arrayed waveguide grating (AWG) 21.
  • ABG arrayed waveguide grating
  • each optical signal is demultiplexed. Are output (demultiplexed) to the corresponding slave station device 30.
  • receiving optical signals from each slave station device 30, they are multiplexed (combined) and output to the master station device 10.
  • the slave station device 30 includes a transmission processing unit (Tx) 31, reception processing units (Rx) 32-1 and 32-2, a multiplexing / demultiplexing unit 33, and a demultiplexing unit 34.
  • the transmission processing unit 31 (upstream signal generating means) converts the input upstream electrical signal into an upstream optical signal having a wavelength assigned in advance.
  • the reception processing units 32-1 and 32-2 (reception processing means) individually execute predetermined reception processing on each downstream optical signal output from the demultiplexing unit 34, and convert it into a downstream electrical signal.
  • the multiplexing / demultiplexing unit 33 separates the downlink signal and the uplink signal.
  • the downlink signal obtained by executing this separation process is a signal in which a plurality of downlink optical signals are multiplexed.
  • the demultiplexing unit 34 performs demultiplexing processing on the downlink signal received from the multiplexing / demultiplexing unit 33, and each of the obtained downlink optical signals corresponds to a corresponding reception processing unit (reception processing unit 32-1 or 32). -2).
  • the demultiplexing unit 34 is realized using a WDM filter.
  • FIG. 2 is a diagram illustrating a configuration example of the transmission processing unit 11 included in the master station device 10.
  • This transmission processing unit 11 includes optical signal generation units 111 1 to 111 2n (optical signal generation unit) and multiplexing unit 112 (multiplexing unit) corresponding to the number of downlink channels that can be used in the system (2n in the present embodiment).
  • Each optical signal generation unit generates light having a wavelength of ⁇ 1 to ⁇ 2n and modulates the generated light with the input downstream electrical signal to generate a plurality of downstream optical signals having different wavelengths.
  • the multiplexer 112 multiplexes (combines) the downlink optical signals generated by the optical signal generators and outputs the multiplexed signals as downlink signals.
  • FIG. 3 is a diagram illustrating a configuration example of the reception processing unit 12 included in the master station device 10.
  • This reception processing unit 12 includes photodetectors 121 1 to 121 n and demultiplexing units 122 corresponding to the number of uplink channels that can be used in the system (n in the present embodiment), and each of the photodetecting units includes demultiplexing units.
  • the upstream optical signal received from 122 is converted into an upstream electrical signal.
  • the demultiplexing unit 122 receives an uplink signal, which is a signal obtained by multiplexing the uplink optical signal, from the multiplexing / demultiplexing unit 13, demultiplexes, and outputs each uplink optical signal to the corresponding photodetector.
  • FIG. 4 is a diagram illustrating an example of the wavelength arrangement of an optical signal used in the optical communication system according to the present embodiment. Specifically, one upstream optical signal is transmitted to each slave station device 30 in the downstream direction. An example in which two optical signals are allocated is shown.
  • the wavelength ⁇ is the wavelength for the downstream signal.
  • the 2n-number of wavelengths from 1 up to a wavelength lambda 2n (light) assigning the n-number of wavelengths from the wavelength lambda 2n + 1 as a wavelength for an upstream signal to the wavelength lambda 3n (light).
  • the wavelength ⁇ 1 is located on the shortest wavelength side. This utilizes the characteristics of the arrayed waveguide grating, and utilizes the fact that signals having wavelengths separated by an integral multiple of the FSR are output from the same port.
  • a data signal and an audio signal for each slave station apparatus are allocated from wavelength ⁇ 1 to wavelength ⁇ n , and wavelength ⁇ Video signals for each slave station device are assigned from n + 1 to wavelength ⁇ 2n .
  • a data signal and an audio signal are transmitted from the remote node 20 to the slave station (ONU) # 1 using light having a wavelength of ⁇ 1 , and the wavelength is ⁇ n + 1.
  • the video signal is transmitted using the light of the light.
  • the upstream signal from the slave station apparatus # 1 is transmitted using light having a wavelength of ⁇ 2n + 1 .
  • the number of wavelengths of the downlink signal (light) assigned to each slave station device is not limited to two wavelengths, and if the wavelength band of the arrayed waveguide grating 21 permits, the number of wavelengths is three or more (array guides for a certain wavelength). A plurality of light beams having wavelengths separated by an integral multiple of the FSR of the waveguide grating 21 may be assigned. Further, the wavelength arrangement is not limited to that shown in FIG. For example, the wavelength arrangement of the downlink signal and the uplink signal may be switched so that the uplink signal is arranged on the short wavelength side and the downlink signal is arranged on the long wavelength side.
  • each downlink electrical signal is input to the corresponding optical signal generation unit.
  • each optical signal generation unit generates a downstream optical signal having a wavelength assigned to itself based on the input downstream electrical signal.
  • the wavelength ⁇ 1 and this and FSR only wavelengths distant lambda n + 1 of the downstream optical signal is an optical signal generating unit 111 1 and 111 n + Generated in 1 .
  • the optical signal generators 111 n and 111 2n generate the downstream optical signal having the wavelength ⁇ n and the wavelength ⁇ 2n that is separated from the wavelength ⁇ n by the FSR.
  • the multiplexing unit 112 receives downstream optical signals generated in each optical signal generation unit, wavelength-division multiplexes them, and generates a signal (downstream signal) in which each downstream optical signal is multiplexed.
  • the downlink signal generated by the transmission processing unit 11 is transmitted to the remote node 20 via the multiplexing / demultiplexing unit 13, and the arrayed waveguide grating 21 of the remote node 20 demultiplexes the input downlink signal and outputs each downlink signal.
  • the optical signal is output to a port (optical fiber) to which the corresponding slave station device 30 is connected. Specifically, as shown in FIG. 4, and outputs the downstream signal wavelength lambda n + 1 at a distance downstream signal and this and FSR fraction of the wavelength lambda 1 from port connected to the slave station apparatuses # 1 . Similarly, downstream signals of wavelengths ⁇ 2 and ⁇ n + 2 are transmitted from the port connected to slave station apparatus # 2, and downstream signals of wavelengths ⁇ n and ⁇ 2n are transmitted from the port connected to slave station apparatus #n. ,Output.
  • each slave station device 30 the signal received from the remote node 20 is first passed to the multiplexing / demultiplexing unit 33, and the multiplexing / demultiplexing unit 33 extracts the downlink signal and outputs it to the demultiplexing unit 34.
  • the demultiplexing unit 34 distributes a plurality of (two in the present embodiment) downstream optical signals that are signals received from the multiplexing / demultiplexing unit 33 to the corresponding reception processing units 32-1 or 32-2. .
  • Each reception processing unit executes predetermined reception processing including processing for converting the received downstream optical signal into an electrical signal.
  • each slave station device 30 transmits uplink data to the master station device 10 .
  • the transmission processing unit 31 generates an upstream optical signal with a wavelength ⁇ 2n + 1 that is separated from the downstream optical signal with ⁇ n + 1 by FSR.
  • the slave station device # 2 generates an upstream optical signal of ⁇ 2n + 2
  • the slave station device #n generates an upstream optical signal of ⁇ 3n .
  • each upstream optical signal received from each slave station device 30 is input to the arrayed waveguide grating 21.
  • each upstream optical signal has a wavelength separated from the downstream optical signal by FSR, and therefore each upstream optical signal is output to a port (optical fiber) to which the master station device 10 is connected.
  • a signal obtained by multiplexing a plurality of upstream optical signals is output to the master station device 10.
  • the upstream signal is passed to the reception processing unit 12 via the multiplexing / demultiplexing unit 13, and the reception processing unit 12.
  • the demultiplexing unit 122 demultiplexes and distributes each upstream optical signal to the corresponding optical detection unit.
  • Each optical detection unit converts the received upstream optical signal into an upstream electrical signal and outputs it.
  • the optical communication system includes a remote node that performs demultiplexing and multiplexing of an optical signal using an arrayed waveguide grating between a master station device and a plurality of slave station devices.
  • the master station device transmits downlink data to the slave station device using light having a certain wavelength and light having a wavelength separated from this light by an integral multiple of the wavelength period (FSR) of the arrayed waveguide grating. did. Thereby, two or more downstream signals can be simultaneously transmitted to one slave station device.
  • FSR wavelength period
  • each slave station device since only the downstream optical signal to be received by the connected slave station device is output to the transmission path (optical fiber) between the remote node and each slave station device, each slave station device A wavelength selection filter for extracting the downstream optical signal is not necessary, and the cost of the slave station apparatus can be reduced.
  • the demultiplexing unit 34 of the slave station device 30 is set according to the number of wavelengths.
  • the WDM filter used in the system is expanded, and the downlink signal wavelengths are cut out in order from the long wavelength side or the short wavelength side, so that all the multiplexed downlink signal wavelengths are received by different reception processing units (reception processing units corresponding to the respective wavelengths). ).
  • Embodiment 2 the optical communication system according to the second embodiment will be described.
  • the configuration in the case where the demultiplexing unit 34 of the slave station device 30 is realized by a WDM filter has been described.
  • the configuration can be realized without using a WDM filter. Therefore, in the present embodiment, an example in the case where the WDM filter is not used will be described.
  • FIG. 5 is a diagram illustrating a configuration example of the optical communication system according to the second embodiment.
  • the configurations of the master station device and the remote node are the same as those of the optical communication system according to the first embodiment described above, but only the configuration of the slave station device is different. Therefore, in the present embodiment, only the slave station device 30a that is different from the first embodiment will be described.
  • symbol is attached
  • the slave station device 30a includes a transmission processing unit 31, reception processing units 32-1 and 32-2, which have a common configuration with the slave station device 30 shown in the first embodiment.
  • a transmission processing unit 31 receives transmission signals from the base station.
  • reception processing units 32-1 and 32-2 receives transmission signals from the base station.
  • an optical power splitter 35 and bandpass filters 36-1 and 36-2 are provided.
  • the optical power splitter 35 When the optical power splitter 35 receives an optical signal in which a plurality of downstream optical signals are multiplexed from the multiplexing / demultiplexing unit 33, the optical power splitter 35 distributes them to the corresponding bandpass filter 36-1 or 36-2.
  • the wavelength of the optical signal to be transmitted is set in advance. For example, if the bandpass filters 36-1 and 36-2 are included in the slave station device # 1, the wavelength lambda 1 signal to the reception processing section 32-1, distributes as wavelength lambda n + 1 signal is supplied to a reception processing section 32-2.
  • variable bandpass filters that can change the transmission wavelength band may be used as the bandpass filters 36-1 and 36-2.
  • an optical power splitter that can divide the signal by the number of downlink signals in the slave station device 30a according to the number of wavelengths, and an downlink optical signal of a specific wavelength
  • all multiplexed downlink signal wavelengths are distributed to different reception processing units (reception processing units corresponding to the respective wavelengths).
  • the optical power splitter and the plurality of bandpass filters are used as a configuration for distributing a plurality of downstream optical signals to the reception processing unit in the slave station apparatus.
  • the same effect as the optical communication system shown in Embodiment 1 can be acquired.
  • the optical communication system according to the present invention is useful for an optical communication system to which the wavelength division multiplexing system is applied, and in particular, can transmit optical signals having a plurality of wavelengths simultaneously to one slave station device. Suitable for realizing the system.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

La présente invention concerne un système de communication optique comprenant une station maîtresse (10) unique, une pluralité de stations asservies (30) abritée dans la station maîtresse (10), et un nœud distant qui divise un signal optique transmis par multiplexage par division en longueur d'onde de la station maîtresse (10) vers chaque station asservie (30) et qui combine des signaux optiques transmis de chaque station asservie (30) vers la station maîtresse (10) en utilisant l’AWG. La station maîtresse (10) génère, pour chaque station asservie (30), une pluralité de signaux optiques ayant des longueurs d'ondes différentes déterminées à l'avance sur la base du FSR de l’AWG et devant être transmis vers une seule et unique station asservie (30), sous la forme de signaux sur la liaison descendante à transmettre vers chaque station asservie (30).
PCT/JP2008/056596 2008-04-02 2008-04-02 Système de communication optique, station maîtresse, et station asservie WO2009122577A1 (fr)

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PCT/JP2008/056596 WO2009122577A1 (fr) 2008-04-02 2008-04-02 Système de communication optique, station maîtresse, et station asservie

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PCT/JP2008/056596 WO2009122577A1 (fr) 2008-04-02 2008-04-02 Système de communication optique, station maîtresse, et station asservie

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013105466A1 (fr) * 2012-01-13 2013-07-18 日本電信電話株式会社 Grille de guide d'ondes en réseau, module optique pourvu dudit guide d'ondes en réseau et système de communication optique
US11327255B1 (en) 2021-02-09 2022-05-10 Shunyun Technology (Zhong Shan) Limited High-efficiency optical communication module of reduced size

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JP2004222304A (ja) * 2003-01-15 2004-08-05 Samsung Electronics Co Ltd 波長分割多重方式光源及びこれを利用した受動型光加入者ネットワークシステム
JP2006025427A (ja) * 2004-07-07 2006-01-26 Samsung Electronics Co Ltd 波長分割多重方式光通信用光源及び光通信システム
JP2006113465A (ja) * 2004-10-18 2006-04-27 Showa Electric Wire & Cable Co Ltd 導波路型光合分波回路

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JP2004222304A (ja) * 2003-01-15 2004-08-05 Samsung Electronics Co Ltd 波長分割多重方式光源及びこれを利用した受動型光加入者ネットワークシステム
JP2006025427A (ja) * 2004-07-07 2006-01-26 Samsung Electronics Co Ltd 波長分割多重方式光通信用光源及び光通信システム
JP2006113465A (ja) * 2004-10-18 2006-04-27 Showa Electric Wire & Cable Co Ltd 導波路型光合分波回路

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013105466A1 (fr) * 2012-01-13 2013-07-18 日本電信電話株式会社 Grille de guide d'ondes en réseau, module optique pourvu dudit guide d'ondes en réseau et système de communication optique
CN104350400A (zh) * 2012-01-13 2015-02-11 日本电信电话株式会社 阵列波导光栅、具备该阵列波导光栅的光模块以及光通信系统
JPWO2013105466A1 (ja) * 2012-01-13 2015-05-11 日本電信電話株式会社 アレイ導波路回折格子、当該アレイ導波路回折格子を備えた光モジュール及び光通信システム
US9116305B2 (en) 2012-01-13 2015-08-25 Nippon Telegraph And Telephone Corporation Arrayed waveguide grating, optical module provided with said arrayed waveguide grating, and optical communications system
US11327255B1 (en) 2021-02-09 2022-05-10 Shunyun Technology (Zhong Shan) Limited High-efficiency optical communication module of reduced size
TWI766661B (zh) * 2021-02-09 2022-06-01 大陸商訊芸電子科技（中山）有限公司 光通訊模組

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