WO2012000254A1 - Système, dispositif et procédé de mise en oeuvre une protection de liaison optique dans un réseau optique passif - Google Patents

Système, dispositif et procédé de mise en oeuvre une protection de liaison optique dans un réseau optique passif Download PDF

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Publication number
WO2012000254A1
WO2012000254A1 PCT/CN2010/077954 CN2010077954W WO2012000254A1 WO 2012000254 A1 WO2012000254 A1 WO 2012000254A1 CN 2010077954 W CN2010077954 W CN 2010077954W WO 2012000254 A1 WO2012000254 A1 WO 2012000254A1
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WO
WIPO (PCT)
Prior art keywords
optical
switching
module
processing module
network unit
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Application number
PCT/CN2010/077954
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English (en)
Chinese (zh)
Inventor
马兴睿
刘少情
王欣
张海军
Original Assignee
中兴通讯股份有限公司
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Publication of WO2012000254A1 publication Critical patent/WO2012000254A1/fr

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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
    • H04B10/03—Arrangements for fault recovery
    • H04B10/032—Arrangements for fault recovery using working and protection systems
    • 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
    • H04Q2011/0079—Operation or maintenance aspects
    • H04Q2011/0081—Fault tolerance; Redundancy; Recovery; Reconfigurability

Definitions

  • the present invention relates to a fiber access technology, and in particular, to a passive optical network (PON) optical link protection system, apparatus, and method.
  • PON passive optical network
  • the Ethernet Passive Optical Network is a new type of fiber access network technology that uses point-to-multipoint architecture and passive optical fiber transmission to provide multiple services over Ethernet. It uses PON technology in the physical layer, Ethernet protocol in the link layer, and Ethernet access using the topology of PON. Therefore, it combines the advantages of PON technology and Ethernet technology: low cost, high bandwidth, high scalability, flexible and fast service reorganization, compatibility with existing Ethernet, easy management, and so on.
  • PON as a new generation of broadband access technology, meets the objective requirements of network development and convergence, and is increasingly used in access networks.
  • the PON system is close to the user. Due to the complexity of various applications and usage environments, it is easily affected by unknown factors such as urban construction, resulting in the interruption of the fiber link. Therefore, it is urgent to require a PON system to provide an efficient fiber link protection solution, which enables reliable protection switching of services in the shortest possible time when a major failure occurs in the fiber link.
  • the present invention provides a system for implementing optical link protection of a passive optical network, comprising: an optical line terminal, two optical splitters, and a plurality of optical network units, wherein: the optical line terminal is set Connecting two optical interfaces of the optical line terminal to the two optical splitters to form two optical links;
  • the optical splitter is configured to split an optical link from a lower link of the optical line terminal into a plurality of optical links
  • the optical network unit is configured to connect two uplink ports of the optical network unit to each of the plurality of optical links that are divided by the two optical splitters;
  • the optical network unit may further include two optical modules, a switching switch, and a passive optical network medium access control PON MAC module, where:
  • Each of the two optical modules is connected to each of the two uplink ports, and the switching switch selects one of the two optical modules to pass the PON MAC module.
  • the switching switch is connected; wherein
  • the optical network unit internally forms an optical link that is mutually protected between the two optical modules and the PON MAC module.
  • the switching switch can be included in a switching device of the optical network unit, and
  • the switching device is configured to control the switching switch to switch to one of the two optical modules according to a state detection result obtained by detecting the two optical modules.
  • the switching device may further include an optical link detecting module and a switching processing module connected to each other, wherein:
  • the optical link detection module is configured to perform real-time detection on the optical power receiving of the two optical modules, and generate an alarm interrupt signal if an optical power receiving of the optical module is detected to be changed. And reporting the alarm interrupt signal to the switching processing module;
  • the switching processing module is configured to output a first switching control instruction to the switching switch according to the received alarm interrupt signal
  • the switching switch is coupled to the switching processing module and configured to connect another optical module to the PON MAC module according to the received first switching control command.
  • the switching processing module can be set by using the setting interface, implemented by hardware or by software.
  • the switching device may further include an anti-shake processing module, the anti-shake processing module is between the optical link detection module and the switching processing module, and the optical link detection module and the switching processing The modules are connected to each other by the anti-shake processing module, wherein:
  • the anti-shake processing module is configured to: receive the alarm interrupt signal generated by the optical link detection module; filter jitter components in the alarm interrupt signal by hardware or software anti-shake processing; and process The subsequent alarm interrupt signal is sent to the switching processing module.
  • the switching device can also include a protocol processing module coupled to the switching switch, wherein:
  • the protocol processing module is configured to process a switching command sent by the optical line terminal or a switching command sent by the optical network unit according to a passive optical network system protocol, and output a second switching control instruction to the switching switch.
  • the switching switch is further configured to connect one of the two optical modules to the PON MAC module according to the received second switching control instruction.
  • the present invention provides an optical network unit for implementing optical link protection of a passive optical network, comprising: two uplink ports, two optical modules, one switching switch, and one passive optical network media access. Control the PON MAC module, where:
  • the two uplink ports are respectively connected to each of the plurality of optical links divided by the two optical splitters;
  • the two optical modules are disposed such that each of the two uplink ports is connected to each of the two uplink ports, and the switching switch selects one optical module from the two optical modules and the PON MAC
  • the module is connected by the switching switch; among them,
  • the optical network unit internally forms an optical link that is mutually protected between the two optical modules and the PON MAC module.
  • the switching switch can be included in a switching device of the optical network unit, and
  • the switching device is configured to control the switching switch to switch to one of the two optical modules according to a state detection result obtained by detecting the two optical modules.
  • the switching device may further include an optical link detecting module and a switching processing module connected to each other, wherein:
  • the optical link detection module is configured to perform real-time detection on the optical power receiving of the two optical modules, and generate an alarm interrupt signal if the optical power receiving of the optical module is changed, and the alarm interrupt signal is generated. Reported to the switching processing module;
  • the switching processing module is configured to output a first switching control instruction to the switching switch according to the received alarm interrupt signal
  • the switching switch is coupled to the switching processing module and configured to connect another optical module to the PON MAC module according to the received first switching control command.
  • the switching processing module can be set by using the setting interface, implemented by hardware or by software.
  • the switching device may further include an anti-shake processing module, the anti-shake processing module is between the optical link detection module and the switching processing module, and the optical link detection module and the switching processing The modules are connected to each other by the anti-shake processing module, wherein:
  • the anti-shake processing module is configured to: receive the alarm interrupt signal generated by the optical link detection module; filter jitter components in the alarm interrupt signal by hardware or software anti-shake processing; and process The subsequent alarm interrupt signal is sent to the switching processing module.
  • the switching device can also include a protocol processing module coupled to the switching switch, wherein:
  • the protocol processing module is configured to process a switching command sent by the optical line terminal or a switching command sent by the optical network unit according to a passive optical network system protocol, and output a second switching control instruction to the switching switch. ; as well as The switching switch is further configured to connect one of the two optical modules to the PON MAC module according to the received second switching control instruction.
  • the present invention provides a method for implementing optical link protection of a passive optical network, including:
  • each splitter splitting the optical link from one lower link of the optical line terminal into multiple optical links Forming mutually protected optical links between the optical line terminal and the two optical splitters;
  • Each of the plurality of optical links divided by the two optical splitters is respectively connected to two uplink ports on one optical network unit, and the two optical splitters and each optical network unit An optical link that is mutually protected is formed between the two uplink ports.
  • the method can also include:
  • each optical network unit The two uplink ports of each optical network unit are respectively connected to two optical modules of the optical network unit, and one switching switch of the optical network unit selects one optical module and the light from the two optical modules.
  • a passive optical network medium access control PON MAC module of the network unit is connected by the switching switch; the optical network unit internally forms an optical link that is mutually protected between the two optical modules and the PON MAC module .
  • the optical network unit When the optical network unit detects that any one of the optical links that are mutually protected is faulty, the optical network unit automatically or manually controls the switching to another corresponding optical link.
  • the system, device and method provided by the present invention are compared with the prior art, and their focus is on the protection of the XPON optical link.
  • 1 is a structural block diagram of an embodiment of an optical link protection system for implementing a passive optical network according to the present invention
  • 2 is a structural block diagram of another embodiment of an optical link protection system for implementing a passive optical network according to the present invention
  • FIG. 3 is a structural block diagram of an embodiment of an ONU for implementing optical link protection of a passive optical network according to the present invention
  • FIG. 4 is a block diagram showing the structure of an embodiment of a switching device for implementing optical link protection in the ONU shown in FIG. 3;
  • a system for implementing optical link protection of a passive optical network comprising: an optical line terminal, two optical splitters, and a plurality of optical network units, wherein: the optical line terminal is set to be two downlinks of the optical line terminal a port is connected to the two optical splitters to form two optical links; the optical splitter is configured to divide an optical link from a lower link of the optical line terminal into a plurality of optical links; and the optical network The unit is configured to connect the two uplink ports of the optical network unit to each of the plurality of optical links divided by the two optical splitters.
  • An optical link that is mutually protected is formed between the optical line terminal and the two optical splitters, and the two optical splitters form a mutual relationship with the two uplink ports of each optical network unit. Protected optical link.
  • FIG. 1 it is a networking structure of an embodiment of a system for implementing passive optical network optical link protection provided by the present invention, the system comprising an optical line terminal (OLT) 10, two optical splitters 12 and two Optical network unit (ONU) 14, where:
  • OLT optical line terminal
  • ONU Optical network unit
  • the OLT 10 is configured to be connected to two optical splitters, that is, the optical splitter 122 and the optical splitter 124 through two lower joint ports (the PON lower port 1 and the PON lower port 2);
  • the optical splitter is configured to split an optical link from a lower link of the OLT 10 into two optical links, and each optical link is respectively connected to two ONUs, that is, an ONU 142 and an uplink of the ONU 144;
  • the ONU is used to connect each uplink port to an optical module, and connects one optical module of the two optical modules to the PON MAC chip (also referred to as a PON MAC module) through a switch.
  • PON MAC chip also referred to as a PON MAC module
  • Each of the optical links between the OLT 10 and the ONU forms two mutually protected optical links, thereby protecting all the optical fibers from the ONU.
  • the optical link between the OLT 10 and the two optical splitters is mutually protected.
  • Each optical splitter and each of the two ONUs form mutually protected optical links.
  • the ONU passes through two optical modules. Forming mutually protected optical links.
  • the optical link formed between the optical splitter 122 and the optical splitter 124 and the ONU 142 is: an optical link formed between the optical splitter 122 and the PON upper port 1 of the ONU 142, and the optical splitter 124 and the ONU.
  • the optical links formed between the PON uplink ports 2 of 142 are mutually protected optical links.
  • the optical link between the optical splitter 122 and the optical splitter 124 and the ONU 144 is mutually protected: the optical link formed between the optical splitter 122 and the PON upper port 1 of the ONU 144 and the optical splitter 124 and the PON of the ONU 144
  • the optical links formed between the uplink ports 2 are mutually protected optical links.
  • the system embodiment shown in Figure 1 can be extended to the mutually protected optical links formed between the OLT 10 and the plurality of ONUs 14, as shown in Figure 2, where:
  • Each of the optical splitters 22 splits the optical link from a lower link of the OLT 20 into N optical links, each of which is connected to an uplink of the N ONUs 24, respectively.
  • Two uplink ports in each of the ONUs 24 and two optical splitters 22 form two mutually protected optical links.
  • An optical network unit for implementing optical link protection of a passive optical network comprising: two uplink ports, two optical modules, one switching switch, and a passive optical network media access control PON MAC module, where: The uplink ports are respectively connected to each of the plurality of optical links divided into two optical splitters; the two optical modules are disposed as each of the two uplink ports An uplink connection is connected, and the switching switch selects one optical module from the two optical modules to be connected to the PON MAC module through the switching switch.
  • the optical network unit internally forms an optical link that is mutually protected between the two optical modules and the PON MAC module.
  • FIG 3 shows the structure of an embodiment of the ONU of Figure 1, each ONU including a switching device
  • the switching device 30 is configured to control the internal according to the result of detecting the state of the optical module 1 and the optical module 2
  • the switch 301 is switched to the optical module 1 or the optical module 2;
  • the optical module 1 and the optical module 2 are connected to the PON MAC chip 32 through two selection ends of the switching switch 301, respectively.
  • the embodiment of the switching device 30 shown in Fig. 3 includes, in addition to the switch 301, a CPU 303 and a Complex Programmable Logic Device (CPLD) 305, wherein:
  • the CPLD 305 is used to report the state detection result of the optical module 1 and the optical module 2 to the CPU 303 through an interrupt signal, and switch the switch 301 to the optical module 1 under the control signal of the CPU 303.
  • the CPU 303 is configured to control the switching operation of the second selection switch 301 according to the state detection result of the optical module 1 and the optical module 2 reported by the CPLD 305.
  • the switching device 200 includes an optical link detecting module 210, a switching processing module 230, and a switching switch 240, which are sequentially connected, wherein:
  • the optical link detection module 210 performs real-time detection on the optical power receiving of the two optical modules by using a CPLD program. When it is found, one of the optical modules is detected, and an alarm interrupt signal is generated and reported to the switching processing module 230.
  • the switching processing module 230 is configured to automatically output a switching control command to the switching switch 240 according to the alarm interrupt signal reported by the optical link detecting module 210.
  • the switching switch 240 is configured to switch and connect the optical module 1 or the optical module 2 to the PON MAC chip under the control of the switching control command output by the switching processing module 230.
  • the optical link detection module 210 detects that the optical power reception of the optical module 1 changes, it indicates that the optical link formed between the optical module 1 and the optical splitter is faulty. At this time, the output is output through the switching processing module 230.
  • the control of the switching control command can cause the switching switch 240 to be switched to the optical module 2.
  • the above-mentioned switching processing module 230 can be implemented by hardware or by software, and can be set by the system maintenance personnel on the setting interface. Among them, the advantage of hardware switching is straight Connected by hardware, no software participation, fast switching time; the advantage of software switching is flexible configuration. As shown in FIG. 4, the embodiment of the switching device may further include an anti-shake processing module 220 between the optical link detecting module 210 and the switching processing module 230, where:
  • the optical link detection module 210 detects that the alarm interrupt signal is generated when one of the optical modules is changed, and the alarm interrupt signal is reported to the switching processing module 230 after being subjected to the anti-shake processing by the anti-shake processing module 220;
  • the anti-shake processing module 220 is configured to filter the jitter component in the alarm interrupt signal.
  • the anti-shake processing module 220 can perform anti-shake processing in a hardware manner or a software manner, or perform anti-shake processing in a combination of the two methods.
  • the function of the anti-shake processing module 220 is to filter the noise signal on the optical link, the optical path failure, and the jitter generated when the optical fiber is manually inserted and removed, thereby effectively preventing the switching switch 240 from frequently switching between the two optical links.
  • the above-described switching device embodiment may further include a protocol processing module 250 coupled to the switch 250, wherein:
  • the protocol processing module 250 is configured to perform a switching command issued by the OLT according to the XPON system protocol or
  • the ONU manual switching command is processed, and a switching control command is output to the switching switch 240;
  • the switching switch 240 switches and connects the optical module 1 or the optical module 2 to the PON MAC chip under the control of the switching control command outputted by the protocol processing module 250.
  • the setting of the protocol processing module 250 solves the requirement that the maintenance personnel perform manual switching operations (either manual switching operation on the OLT side or manual switching operation on the ONU side) in the XPON system, and also solves the maintenance according to the maintenance.
  • the specific needs of the personnel are required to perform various specific protection operations, such as recoverable mode and recovery time, and the protocol processing module 250 can simultaneously support multiple protocols, which facilitates flexible configuration and modification of maintenance personnel.
  • the optical link detecting module 210 is implemented by loading the program in the CPLD shown in FIG. 3, and the hardware switching mode of the switching processing module 230 is loaded.
  • the software switching mode is implemented by the CPU shown in FIG. 3;
  • the anti-shake processing module 220 can be implemented by the hardware anti-shake processing module loaded in the CPLD, or through the CPU.
  • Software anti-shake processing module implementation; protocol processing module Block 250 is implemented by the CPU.
  • the present invention is directed to the above-described system embodiments, and correspondingly provides an embodiment for implementing a passive optical network optical link protection method.
  • the method comprises: connecting an optical line terminal to two optical splitters through two lower joint ports thereof to form two optical links, each splitter dividing the optical link from a lower joint of the optical line terminal into multiple a light link, the optical line terminal and the two optical splitters form an optical link that is mutually protected; each of the plurality of optical links that the two optical splitters are divided into The two uplink ports of one optical network unit are respectively connected to each other, and the two optical splitters form a mutually protected optical link with the two uplink ports of each optical network unit.
  • an optical link protection network that is, two lower interfaces of one OLT are respectively connected to two optical splitters, and each optical splitter splits the optical link from the OLT to the lower joint into multiple optical links, and two optical splits.
  • Each optical link on the device is connected to two uplink ports on one ONU; two optical links are formed between the OLT and the two optical splitters, and each splitter is connected between each two ONUs. Forming mutually protected fiber links;
  • the two uplink ports of the ONU are respectively connected to two optical modules, and one optical module of the two optical modules is connected to the PON MAC module through a switch;
  • the optical modules form mutually protected optical links.
  • the ONU When the ONU detects that any optical link in the mutually protected optical link fails, the ONU automatically or manually switches to another corresponding optical link.
  • the system, device and method provided by the present invention are compared with the prior art, and their focus is on the protection of the optical link of the XPON.
  • the hardware switching or software switching is used to make the switching process flexible.
  • the advantage of hardware switching is that it is directly switched by hardware, without software participation, and the switching time is fast.
  • the switching operation is stable and fast; manual switching or maintenance is required
  • specific protection operations such as recovery operation and recovery time setting in the recoverable mode
  • the software switching mode is configured, and multiple system protocols can be supported at the same time, and the operation interface specially provided for the maintenance personnel is provided. Make configuration and modification very convenient and flexible.
  • the system, the device and the method provide two optical links that are mutually protected on each optical link between the OLT and the ONU, and the optical link is quickly and effectively detected.
  • the protection of all the Fibre Channels on the ONU uplink; the hardware switching or the software switching settings make the switching process more flexible; when manual switching is required or various specific protection operations are performed according to the specific needs of the maintenance personnel, the software switching mode is configured, and It can support multiple system protocols at the same time.
  • the operation interface specially provided for maintenance personnel makes configuration and modification very convenient and flexible. By using hardware anti-shake and/or software anti-shake processing, it can effectively filter the noise on the optical link.
  • the optical signal is dithered due to faults and manual disconnection, so as to avoid frequent switching between two mutually protected optical links.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention concerne un système, un dispositif et un procédé de mise en oeuvre d'une protection de liaison optique dans un réseau optique passif. Ledit système comporte: un terminal de ligne optique, deux diviseurs et plusieurs unités de réseau optique; le terminal de ligne optique est connecté aux deux diviseurs pour former deux liaisons optiques par le biais de ses deux ports descendants; les diviseurs divisent la liaison optique à partir d'un port descendant du terminal de ligne optique en plusieurs liaisons optiques; les deux ports montants de l'unité de réseau optique sont reliés à l'une des nombreuses liaisons optiques divisées par les deux diviseurs respectivement; des liaisons optiques se protégeant mutuellement sont formées entre le terminal de ligne optique et les deux diviseurs, et les liaisons optiques se protégeant mutuellement sont formées entre les deux diviseurs et les deux ports montants de chacune des unités de réseau optique. Selon l'invention, on filtre efficacement des gigues de signaux optiques sur la liaison optique causées par le bruit, une défaillance et une entrée de prise manuelle et une sortie de prise par le biais de la détection rapide des liaisons optiques, ce qui permet d'éviter la commutation fréquente entre deux liaisons optiques se protégeant mutuellement.
PCT/CN2010/077954 2010-06-30 2010-10-21 Système, dispositif et procédé de mise en oeuvre une protection de liaison optique dans un réseau optique passif WO2012000254A1 (fr)

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CN201010222762.8A CN101877612B (zh) 2010-06-30 2010-06-30 实现无源光网络光链路保护的系统、装置及方法
CN201010222762.8 2010-06-30

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CN1921357A (zh) * 2006-09-21 2007-02-28 杭州华为三康技术有限公司 一种全光纤保护装置及其方法
CN101877612A (zh) * 2010-06-30 2010-11-03 中兴通讯股份有限公司 实现无源光网络光链路保护的系统、装置及方法

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CN1921357A (zh) * 2006-09-21 2007-02-28 杭州华为三康技术有限公司 一种全光纤保护装置及其方法
CN101877612A (zh) * 2010-06-30 2010-11-03 中兴通讯股份有限公司 实现无源光网络光链路保护的系统、装置及方法

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EP3000993A1 (fr) 2014-09-26 2016-03-30 MAUL, Martin Dispositif de production d'energie, en particulier installation orc
DE102014014032A1 (de) 2014-09-26 2016-03-31 Martin Maul Vorrichtung zur Energieerzeugung, insbesondere ORC-Anlage
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CN106576000A (zh) * 2015-04-29 2017-04-19 华为技术有限公司 分光器、信号传输方法和无源光网络
CN106576000B (zh) * 2015-04-29 2018-12-14 华为技术有限公司 分光器、信号传输方法和无源光网络
DE102016204405A1 (de) 2016-03-17 2017-09-21 Martin Maul Vorrichtung zur Energieerzeugung, insbesondere ORC-Anlage

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