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WO2013087006A1 - Système de réseau optique passif (pon), terminal de ligne optique (olt) et procédé de transmission optique - Google Patents

Système de réseau optique passif (pon), terminal de ligne optique (olt) et procédé de transmission optique Download PDF

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Publication number
WO2013087006A1
WO2013087006A1 PCT/CN2012/086576 CN2012086576W WO2013087006A1 WO 2013087006 A1 WO2013087006 A1 WO 2013087006A1 CN 2012086576 W CN2012086576 W CN 2012086576W WO 2013087006 A1 WO2013087006 A1 WO 2013087006A1
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WO
WIPO (PCT)
Prior art keywords
optical
olt
wdm
downlink
processing module
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/CN2012/086576
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English (en)
Chinese (zh)
Inventor
付志明
徐继东
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ZTE Corp
Original Assignee
ZTE Corp
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Filing date
Publication date
Application filed by ZTE Corp filed Critical ZTE Corp
Publication of WO2013087006A1 publication Critical patent/WO2013087006A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H04B10/27—Arrangements for networking
    • H04B10/272—Star-type networks or tree-type networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/009—Topology aspects

Definitions

  • the present invention relates to the field of optical access technologies, and in particular, to a passive optical network system, an optical line terminal, and an optical transmission method using the passive optical network system. Background technique
  • the communication network uses the optical fiber to form a network from the core network to the metropolitan area network to the access network.
  • each passive optical network only has several users.
  • PON passive optical network
  • the space of the office room is limited, and the number of PON ports cannot be too large.
  • the number of optical network units (ONUs) that optical line terminals (OLTs) can carry is almost unlimited. .
  • the embodiments of the present invention provide an optical transmission method for a passive optical network system, an optical line terminal, and an application passive optical network system, so as to solve the inefficient operation of the existing PON ports of two different PONs sharing one ODN. problem.
  • Embodiments of the present invention provide a passive optical network (PON) system, including multiple optical distribution networks (ODNs) and a plurality of optical network units (ONUs) connected to each ODN, and the system further The method includes: a plurality of first wavelength division multiplexing (WDM) connected to the plurality of ODNs, an uplink optical processing module and a downlink optical processing module connected to each of the first WDMs, and a plurality of optical line terminals (OLTs) of the plurality of different PONs connected to the uplink optical processing module and the downlink optical processing module, where:
  • WDM wavelength division multiplexing
  • OLTs optical line terminals
  • the first WDM is configured to send the downlink optical from the downlink optical processing module to the ODN corresponding to the first WDM by using the ODN corresponding to the first WDM. Connected to the ONU;
  • the upstream optical processing module is configured to firstly couple the uplink optical signals from the plurality of the first WDMs to the plurality of OLTs;
  • the plurality of OLTs are configured to receive the uplink light input from the upstream optical processing module, and send the downlink light to the downlink optical processing module;
  • the downlink optical processing module is configured to amplify and combine the downlink lights sent by the multiple OLTs, and divide the combined downlink lights into multiple channels and output the signals to the plurality of first WDMs.
  • the upstream optical processing module includes a mode coupler and a second WDM connected in sequence, wherein: the mode coupler is connected to each of the first WDMs, and is configured to couple upstream light from the plurality of the first WDMs Outputted together to the second WDM;
  • the second WDM is configured to split the upstream light from the mode coupler and output to the plurality of OLTs respectively;
  • the downstream optical processing module includes a beam splitter and a plurality of optical amplifiers connected to the optical splitter, wherein:
  • the plurality of optical amplifiers are respectively connected to the plurality of OLTs, and are arranged to be amplified by the received downlink light and output to the optical splitter;
  • the optical splitter is connected to each of the first WDMs, and is configured to optically couple the downstream optical fibers from the optical amplifier into multiple multiplexed outputs to the plurality of first WDMs.
  • the OLT is configured to receive the uplink light from the second WDM input through its own light receiving module, and send the downlink light to the optical amplifier of the downlink optical processing module corresponding to itself through its own optical transmitting module.
  • the optical splitter is an M*N optical splitter, and the mode coupler is a 1*N mode coupler; N and M are integers greater than one.
  • the mode coupler is configured to receive the upstream light from the plurality of first WDMs transmitted through the single mode fiber, and couple the uplights together by using a lens or a fused push or waveguide to output through the multimode fiber to On the second WDM.
  • the system includes a first OLT and a second OLT, the first OLT is an OLT of a first PON, and the second OLT is an OLT of a second PON;
  • the first PON is a Gigabit Passive Optical Network (GPON)
  • the second PON is a 10 Gigabit Passive Optical Network (XGPON).
  • the first WDM is a sideband filter with a boundary of 1450 nm, and the second WDM is 1280 nm.
  • a sideband filter for the demarcation point an optical amplifier connected to the first OLT is an S-band semiconductor optical amplifier (SOA); and an optical amplifier connected to the second OLT is an L-band erbium Erbium Doped Fiber Amplifier (EDFA) or SOA.
  • SOA S-band semiconductor optical amplifier
  • EDFA L-band erbium Erbium Doped Fiber Amplifier
  • the embodiment of the present invention further provides an optical line terminal (OLT), which is applied to any one of a plurality of different passive optical networks (P0N) sharing a single optical distribution network (0DN), where the 0LT includes:
  • a light receiving module configured to receive from the 0LT, sent by the 0DN
  • Yuan (0NU) sends the downstream light.
  • the P0N where the 0LT is located is a Gigabit Passive Optical Network (GPON) or a 10 Gigabit Passive Optical Network (XGPON).
  • GPON Gigabit Passive Optical Network
  • XGPON 10 Gigabit Passive Optical Network
  • An embodiment of the present invention further provides an optical transmission method using the foregoing PON system, where the method includes:
  • the first WDM sends the ODN corresponding to the first WDM
  • the upstream optical processing module first couples the uplink opticals from the plurality of the first WDMs and then outputs the uplink optical signals to the plurality of OLTs.
  • the method further includes:
  • the downlink optical processing module amplifies and combines the downlink lights sent by the multiple OLTs, and divides the combined downlink lights into multiple channels and outputs the signals to the plurality of first WDMs;
  • the above-mentioned passive optical network system, optical line terminal, and optical transmission method using the passive optical network system enable the number of ODNs that the OLT can manage to be significantly increased, thereby significantly increasing the number of ONUs that can be managed and connected to the ODN. Improve the efficiency of the PON port.
  • FIG. 1 is a schematic structural diagram of a passive optical network in which a conventional GPON and an XG-PON coexist
  • FIG. 2 is a schematic structural diagram of an embodiment of a passive optical network according to the present invention
  • FIG. 3 is a schematic structural view of an embodiment of a first WDM wavelength division multiplexing coupler according to the present invention
  • FIG. 4 is a schematic structural view of an embodiment of a second WDM wavelength division multiplexing coupler according to the present invention
  • Embodiments of the present invention can perform management on multiple optical distribution networks (ODNs) by modifying the existing OLT equipment of the local office, in particular, sharing an ODN with different PONs such as GPON and XG-PON.
  • OLT optical line terminal
  • PONs passive optical networks
  • ODN optical distribution network
  • an optical receiving module configured to receive uplink light sent by the ODN from an optical network unit (ONU) of the PON where the OLT is located; and an element (ONU) to transmit downlink light.
  • ONU optical network unit
  • ONU element
  • the PON where the OLT is located is a Gigabit Passive Optical Network (GPON) or a 10 Gigabit Passive Optical Network (XGPON).
  • GPON Gigabit Passive Optical Network
  • XGPON 10 Gigabit Passive Optical Network
  • the OLTs of a plurality of different PONs sharing one ODN have an optical receiving module and an optical transmitting module, so that the number of ODNs that the OLT can manage is significantly increased, thereby significantly increasing the number of ONUs that can be managed and connected to the ODN, thereby improving The efficiency of the PON port.
  • the embodiment of the invention further provides a PON system, the system comprising a plurality of optical distribution networks (ODNs) and a plurality of optical network units (ONUs) connected to each of the ODNs, the system further comprising: - corresponding to a plurality of connected first wavelength division multiplexers (WDMs), an upstream optical processing module and a downstream optical processing module connected to each of the first WDMs, and the upstream optical processing module and the downstream optical processing Modules are connected to multiple optical line terminals (OLTs) of multiple different PONs, where:
  • the first WDM is configured to send the downlink optical from the downlink optical processing module to the ODN corresponding to the first WDM by using the ODN corresponding to the first WDM. Connected to the ONU;
  • the upstream optical processing module is configured to firstly couple the uplink optical signals from the plurality of the first WDMs to the plurality of OLTs;
  • the plurality of OLTs are configured to receive the uplink light input from the upstream optical processing module, and send the downlink light to the downlink optical processing module;
  • the downlink optical processing module is configured to amplify and downlink the downlink light sent by the multiple OLTs And dividing the merged downlink light into multiple channels and outputting to the plurality of first WDMs.
  • the upstream optical processing module may include a mode coupler and a second WDM connected in sequence, wherein: the mode coupler is connected to each of the first WDMs, and is configured to couple the upstream optical signals from the plurality of the first WDMs Outputting to the second WDM together; the second WDM is configured to split the uplink light from the mode coupler and output to the plurality of OLTs respectively; the downlink optical processing module may include splitting And a plurality of optical amplifiers connected to the optical splitter, wherein: the plurality of optical amplifiers are respectively connected to the plurality of OLTs, and are arranged to amplify the received downlink light and output the a beam splitter; the beam splitter is connected to each of the first WDMs, and is configured to couple the downstream light from the optical amplifier into multiple channels and output the signals to the plurality of first WDMs.
  • the OLT in this embodiment is different from the prior art in that it receives uplink light from the second WDM input through its own optical receiving module, and sends a downlink optical processing module corresponding to itself through its own optical transmitting module.
  • the optical amplifier transmits downstream light.
  • the optical splitter is an M*N optical splitter
  • the mode coupler is a 1*N mode coupler
  • the M is 2, the system includes a first OLT and a second OLT, the first OLT is an OLT of a first PON, and the second OLT is an OLT of a second PON; the first PON For GPON, the second PON is an XGPON.
  • the optical transmission method applied by the above system includes:
  • Step 11 The first WDM sends the ODN corresponding to the first WDM to the step 12, and the uplink optical processing module first couples the uplink opticals from the plurality of the first WDMs and then splits the signals. Output to the plurality of OLTs.
  • the above steps 11-12 are the transmission process of the uplink light.
  • the system can also perform the transmission of the downlink light, and the specific process is as follows:
  • Step 21 The downlink optical processing module amplifies and combines the downlink lights sent by the multiple OLTs, and divides the combined downlink lights into multiple channels and outputs the signals to the plurality of first WDMs;
  • FIG. 2 it is a schematic structural diagram of an embodiment of a passive optical network according to the present invention.
  • the two OLTs use the OLT provided in the embodiment of the present invention.
  • the first WDM, the upstream optical processing module and the downstream optical processing module are added in comparison with the system;
  • the upstream optical processing module includes a second WDM and a mode coupler;
  • the downstream optical processing module includes a 2x4 optical splitter and an S-band optical amplifier and L-band optical amplifier, where:
  • the main function of the first WDM is to split and synthesize the upstream and downstream lights, such as directing the upstream light to the mode coupler and directing the downstream light to the backbone fiber of the PON.
  • a sideband filter can be used to perform this function, as shown in Fig. 3, which is a sideband filter with a boundary of 1450 nm, for wavelengths less than 1450 nm light enters and exits from its transmission port, and for light with a wavelength greater than 1450 nm from its reflection port, its C interface is directly connected to the trunk fiber.
  • the main function of the second WDM is to split the upstream light of different wavelengths.
  • the optical fiber connecting the entrance and exit optical paths is a multimode optical fiber.
  • a sideband filter can be used to perform this function, as shown in Fig. 4, which is a sideband filter with a boundary of 1280 , for light with a wavelength of less than 1280 nm.
  • the transmission port enters and exits, and for light having a wavelength greater than 1280 nm to enter and exit from its reflection port, its C interface is directly connected to the multimode fiber end of the mode coupler.
  • the main function of the 2x4 optical splitter is to combine the downstream optical of the GPON OLT with the downstream optical of the OLT of the XG-PON and divide it into four optical lights respectively to the corresponding first WDM to enter the corresponding ODN network.
  • the main function of the mode coupler is to couple the upstream lights from multiple ODN networks together and input them to the second WDM. Its main features are shown in Figure 5, the upstream light through the single mode fiber (Single Mode The fiber, SMF is aggregated and transmitted to the second WDM through a multimode fiber (MMF), and the upstream light from the different ODNs is coupled to the mode via the single mode fiber by the upstream light separated by the respective first WDM.
  • the devices are connected, and then the coupling mechanism can be a lens, or a plurality of single mode fibers can be coupled to the multimode fiber by a plurality of methods such as pulling or pushing.
  • the main function of the S-band optical amplifier is to amplify the downstream light of the GPON OLT due to
  • GPON's downstream light is between 1480nm and 1500nm, so its working band needs to be in the S-band, and the S-band semiconductor optical amplifier (SOA) is usually chosen as its optical amplifier.
  • SOA semiconductor optical amplifier
  • the main function of the L-band optical amplifier is to amplify the downstream light of the XG-PON OLT. Since the downstream light of the XG-PON is between 1575nm and 1581nm, its working band needs to be in the L-band, usually the L-band is selected.
  • a fiber amplifier (EDFA) or SOA is used as its optical amplifier.
  • connection relationship between these modules is shown in Figure 2.
  • the merging problem of the four ODN networks is mainly discussed.
  • the backbone fibers of the four ODNs are connected to the respective first WDMs, and the four upstream lights separated by the first WDM.
  • the downstream light is connected to the S-band optical amplifier and the downstream light of the XG-PON OLT is connected to the L-band optical amplifier, and then the two optical amplifiers are respectively connected to the two inlets of the 2x4 splitter, and the four of the 2x4 splitters are connected.
  • the outlets are respectively connected to the corresponding first WDM modules; the four ODNs are connected to the ONUs of the plurality of GPONs and the ONUs of the XG-PONs through the branch fibers.
  • the downstream light of the OLT of the GPON enters the optical amplifier of the S-band, and the downstream light of the OLT of the XG-PON enters the optical amplifier of the L-band, and the two descending lights that are amplified enter the 2x4 optical splitter connected thereto, and are evenly divided.
  • the R interface of the first WDM wavelength division optical module connected to the optical splitter exits the C interface and enters the trunk optical fiber of the corresponding ODN, and then transmits to the corresponding ODN optical splitter and the branch connected thereto.
  • the optical fiber finally arrives at the corresponding ONU.
  • each ONU receives the downstream light from the GPON OLT and the XG-PON OLT. Only the GPON ONU can only receive the GPON downlink signal, and the XG-PON ONU can only Receive the downlink signal of XG-PON.
  • the upstream light of the GPON ONU and the upstream light of the XG-PON ONU pass their respective points.
  • the supporting fiber reaches the corresponding ODN optical splitter.
  • these ODNs generally have three types, one ODN only has GPON-ONU; the other 0DN only has XG-P0N-0NU, and another 0DN has both GP0N-0NU also carries XG-P0N-0NIL. Regardless of the type, these 0NU upstream lights arrive at the C interface of the first WDM module via the corresponding 0DN and the backbone fiber connected to it, and are then split out of the first WDM P.
  • the multimode exit of the mode coupler After entering the mode coupler, the multimode exit of the mode coupler enters the C interface of the second WDM module, and then separates the two upstream lights, and inputs the light output from the R interface to the OLT of the GPON, and The light output from the P interface of the second WDM is input to the OLT of the XG-PON.
  • the ODNs shared by the four GPONs and the XG-PONs are mainly combined in one GPON OLT and one XG-PON OLT.
  • the present invention is not limited to the combination of only four ODNs, and may be N ODNs. Simply replace the mode coupler with a 1:N mode coupler and replace the splitter with a 2*N splitter.
  • the OLT in the PON system of the above structure can manage multiple optical distribution networks (ODNs), effectively improving the efficiency of the PON port.
  • ODNs optical distribution networks
  • the above-mentioned passive optical network system, optical line terminal, and optical transmission method using the passive optical network system enable the number of ODNs that the OLT can manage to be significantly increased, thereby significantly increasing the number of ONUs that can be managed and connected to the ODN. Improve the efficiency of the PON port.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computing Systems (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention concerne un système de réseau optique passif (PON), un terminal de ligne optique (OLT) et un procédé de transmission optique qui applique le système PON. Ledit système PON comprend de multiples réseaux de distribution passifs (ODN), de multiples ONU connectées avec chaque ODN, des premiers WDM qui sont connectés en un pour un, de manière correspondante, avec les multiples ODN, un module de traitement optique de liaison montante et de liaison descendante, tous deux connectés avec chaque premier WDM et plusieurs OLT de multiples PON différents, tous respectivement connectés avec les modules de traitement optique de liaison montante et de liaison descendante; le module de traitement optique de liaison montante est configuré pour : coupler d'abord la lumière de liaison montante provenant des multiples premiers WDM, puis la diviser et l'émettre en sortie vers les multiples OLT; les multiples OLT sont configurés pour : recevoir la lumière de liaison montante émise par le module de traitement optique de liaison montante et envoyer de la lumière de liaison descendante vers le module de traitement optique de liaison descendante; le module de traitement optique de liaison descendante est configuré pour : amplifier, puis combiner la lumière de liaison descendante envoyée par les multiples OLT, diviser la lumière de liaison descendante combinée dans de multiples canaux et l'émettre en sortie respectivement vers les multiples premiers WDM. La solution technique de la présente invention améliore l'efficacité des ports du PON.
PCT/CN2012/086576 2011-12-16 2012-12-13 Système de réseau optique passif (pon), terminal de ligne optique (olt) et procédé de transmission optique Ceased WO2013087006A1 (fr)

Applications Claiming Priority (2)

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CN201110424224.1A CN102572619B (zh) 2011-12-16 2011-12-16 无源光网络系统、光线路终端和光传输方法
CN201110424224.1 2011-12-16

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Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103139670B (zh) * 2011-11-25 2018-04-10 中兴通讯股份有限公司 共存无源光网络系统及上、下行光信号发送方法
CN102572619B (zh) * 2011-12-16 2018-03-02 中兴通讯股份有限公司 无源光网络系统、光线路终端和光传输方法
CN104125517B (zh) * 2013-04-26 2019-02-22 中兴通讯股份有限公司 一种光传输系统、模式耦合器和光传输方法
CN103281638A (zh) * 2013-06-21 2013-09-04 苏州彩云飞电子有限公司 多波长无源光网络系统
CN105792027B (zh) * 2014-12-22 2019-11-29 南京中兴新软件有限责任公司 无源光网络系统、控制器及通信的方法
CN105357597B (zh) * 2015-09-29 2018-12-18 中国联合网络通信集团有限公司 一种无源光纤网络、数据传输的方法及装置
CN106209244B (zh) * 2016-06-29 2018-08-31 武汉电信器件有限公司 多功能的olt光模块
CN105915558B (zh) * 2016-06-30 2019-06-04 瑞斯康达科技发展股份有限公司 一种onu混插的无源光网络通信方法及系统
CN112292818A (zh) * 2018-09-21 2021-01-29 华为技术有限公司 无源光网络(pon)信道绑定协议
CN109379646B (zh) * 2018-10-12 2021-09-24 江西山水光电科技股份有限公司 一种无源光网络系统及其通讯方法
CN110602575B (zh) * 2019-09-02 2022-03-25 烽火通信科技股份有限公司 Wdm pon波长扩容方法及系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1845485A (zh) * 2006-04-23 2006-10-11 沈红 光纤接入混合网络的系统实现方法
US20060275036A1 (en) * 2005-06-06 2006-12-07 Broadlight Ltd. Method and apparatus for automatically upgrading passive optical networks (PONs)
CN102045130A (zh) * 2009-10-20 2011-05-04 华为技术有限公司 一种下行成帧的方法、光线路终端及无源光网络系统
CN102238437A (zh) * 2010-05-01 2011-11-09 中兴通讯股份有限公司 一种长距盒及其对上下行光的处理方法
CN102572619A (zh) * 2011-12-16 2012-07-11 中兴通讯股份有限公司 无源光网络系统、光线路终端和光传输方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8515278B2 (en) * 2008-10-31 2013-08-20 Futurewei Technologies, Inc. Passive optical networks with mode coupling receivers
CN101877798B (zh) * 2009-04-30 2014-08-13 中兴通讯股份有限公司 现有无源光网络和下一代无源光网络的共存系统,升级方法
CN101959086A (zh) * 2009-07-15 2011-01-26 中兴通讯股份有限公司 时分复用与波分复用共存的无源光网络系统及传输方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060275036A1 (en) * 2005-06-06 2006-12-07 Broadlight Ltd. Method and apparatus for automatically upgrading passive optical networks (PONs)
CN1845485A (zh) * 2006-04-23 2006-10-11 沈红 光纤接入混合网络的系统实现方法
CN102045130A (zh) * 2009-10-20 2011-05-04 华为技术有限公司 一种下行成帧的方法、光线路终端及无源光网络系统
CN102238437A (zh) * 2010-05-01 2011-11-09 中兴通讯股份有限公司 一种长距盒及其对上下行光的处理方法
CN102572619A (zh) * 2011-12-16 2012-07-11 中兴通讯股份有限公司 无源光网络系统、光线路终端和光传输方法

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