WO2007030998A1 - Reseau d'acces a fibres et procede associe de protection de communication - Google Patents

Reseau d'acces a fibres et procede associe de protection de communication Download PDF

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Publication number
WO2007030998A1
WO2007030998A1 PCT/CN2006/002171 CN2006002171W WO2007030998A1 WO 2007030998 A1 WO2007030998 A1 WO 2007030998A1 CN 2006002171 W CN2006002171 W CN 2006002171W WO 2007030998 A1 WO2007030998 A1 WO 2007030998A1
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WO
WIPO (PCT)
Prior art keywords
wireless
optical
communication
communication service
signal
Prior art date
Application number
PCT/CN2006/002171
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English (en)
Chinese (zh)
Inventor
Han Li
Bing Wei
Jianming Zhou
Original Assignee
China Mobile Communications Corporation
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 China Mobile Communications Corporation filed Critical China Mobile Communications Corporation
Publication of WO2007030998A1 publication Critical patent/WO2007030998A1/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
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/112—Line-of-sight transmission over an extended range
    • 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

Definitions

  • the invention relates to a fiber access network and a communication protection method thereof, in particular to a fiber access network having a communication protection function capable of providing wireless communication protection in the event of a fiber failure, and ensuring communication when a fiber breakage occurs.
  • a communication protection method that is performed unaffected by the service. Background technique
  • fiber access networks is an inevitable trend in the development of fiber-optic communications.
  • the topologies of fiber-optic access networks usually have five types: single-star, multi-star, tree, bus, and ring. For the first four, they can be collectively referred to as stars. Shape structure. Compared with ring networks and point-to-point systems, the star network can save a large number of fiber and optical transceiver modules, and its branch structure is easy to cover. Therefore, for fiber access networks, a star structure is generally adopted.
  • the optical fiber line In the fiber access network, in order to ensure the normal operation of the communication service, the optical fiber line is usually protected.
  • the protection modes are as follows:
  • the primary and backup optical fibers are provided in the same optical cable.
  • the backup optical fiber can be enabled.
  • this method cannot be used. Ensure the normal operation of the communication service.
  • the main and backup fibers are in different optical cables, so that when the fiber optic cable where the main fiber is located is cut off, the backup fiber can be enabled, but this way It can only protect the general cable cut-off fault, but can not prevent large-scale faults, such as large-scale accidents of cutting off the cable duct due to the construction of large machinery.
  • the sub-cable split mode is used for protection, that is, the main and backup optical fibers are not only different cables, but also the pipes or routes are different. This approach provides maximum protection for fiber optic lines, but it is economically expensive.
  • the main purpose of the present invention is to provide a fiber access network and its communication for the defects of the above-mentioned protection mode of the fiber access network and the reasons and current situation of insufficient protection of the fiber line of the star fiber access network in actual use.
  • the protection method, the fiber access network and the method combine the wireless communication system and the optical fiber communication system, so that the communication service of the optical fiber communication system is strongly guaranteed.
  • the present invention provides a fiber access network, including an optical fiber communication system composed of at least an optical line terminal, an optical distribution network, an optical network unit, and a user-side integrated access device, and a wireless base station.
  • a wireless base station is in communication with the optical line terminal; the wireless base station is wirelessly connected to the wireless user equipment; the wireless user equipment and the optical network unit are respectively associated with a communication service switching device for switching the communication line
  • the wireless client device is further connected to the optical network unit, and the communication service switching device is connected to the user integrated access device;
  • the optical network unit is provided with a detection module for detecting a signal and A control module for issuing a handover control signal to the communication service switching device.
  • the detection module may be connected to the control module, and the communication service switching device may be placed inside the optical network unit, that is, integrated with the optical network unit.
  • the fiber access network can protect communication services between optical line terminals and optical network units in a fiber-optic communication system.
  • the communication service is performed in a fiber-optic communication system, and when the diaphragm communication system operates, the detection module detects the amplitude, power, and/or energy of the signal transmitted in the fiber-optic communication system.
  • the amplitude, power and/or energy of the signal is lower than a preset threshold, it is considered that the optical fiber between the optical line communication system and the optical network unit is broken, and the communication service switching device will be the optical fiber communication system.
  • the communication service is switched to the wireless communication system; since the optical fiber communication is superior to the wireless communication system in terms of transmission rate and stability, when the detection module detects that the amplitude, power and/or energy of the signal from the optical line terminal is higher than When the threshold value is set in advance, it is considered that the fiber breakage failure is eliminated in the optical fiber communication system, and then the communication service switching device switches the communication service from the wireless communication system back to the optical fiber communication system.
  • the invention adopts a wireless communication system to protect the optical fiber line of the star fiber access network, has a simple structure, can detect faults in time and can effectively switch between communication systems, and satisfies the user's demand for network unavailable time, and Compared with the protection scheme of the fiber-optic line without protection or 1+1 cable protection of the current star fiber access network, it not only breaks the limitation of pipeline and optical cable resources, but also greatly reduces the investment and operation and maintenance costs, and can also be used without the optical cable.
  • the place uses the wireless method to quickly cover the communication area.
  • the wireless communication system can be used as the protection system of the fiber-optic communication system, which is beneficial to the step-by-step implementation and the benefit of the equipment, the popularity of the star optical network, and the guarantee of users.
  • the smooth flow of communication services for group users is very beneficial.
  • FIG. 1 is a system structural diagram of a fiber access network according to the present invention.
  • FIG. 2 is a schematic flow chart of switching a communication service from a fiber-optic communication system to a wireless communication system
  • Fig. 3 is a flow chart showing the process of restoring a communication service from a wireless communication system to a fiber-optic communication system. detailed description
  • the main idea of the present invention is to introduce a wireless communication system to an optical line terminal in a star fiber access network.
  • the optical fiber line between the optical network unit and the optical network unit is protected by a fiber optic communication system, a wireless communication system, and a communication service switching device.
  • the communication service is performed in the optical fiber communication system.
  • the communication service switching device switches the communication service in the optical fiber communication system to the wireless communication.
  • the communication service switching device Since optical fiber communication is superior to wireless communication in terms of transmission rate and stability, after the fiber breakage fault is eliminated in the fiber-optic communication system, the communication service switching device switches the communication service from the wireless communication system back to the fiber-optic communication system.
  • the optical fiber communication system includes at least an optical line terminal 1, an optical distribution network 2, an optical network unit 3, and a user terminal integrated access. device.
  • the optical line terminal 1 has an interface with a switching network, a data network, a wireless base station 6, and an optical distribution network 2, and is connected to a switch, a router, a wireless base station 6, and an optical distribution network 1, respectively, to provide necessary means.
  • the optical distribution network 2 provides the optical network unit 3 and the optical line terminal 1 with the physical connection of the optical fiber as the transmission medium, and redistributes the power after the signals transmitted in the optical fiber are coupled in the coupling region;
  • the network unit 3 is provided with an interface connected to the wireless client device 7 and an interface of the user terminal integrated access device 5, and is connected to the optical distribution network 2 and the communication service switching device 4 for switching the communication line, at least including a detection module 31 for detecting a signal transmitted in the signal fiber communication system, an alarm module 32 for generating a signal loss alarm information when the detection module 31 does not detect the signal, and a switching control signal for transmitting the communication service switching device 4 Control module 33, service interface function module 34 for transmitting and receiving information of the wireless client device 7, and for accessing the optical network unit 3 Power supply and integrated service management and maintenance management function module 35, wherein the detection module 31 is connected to the alarm module 32 and a power supply and maintenance management module can also be connected to the control module 33, the amplitude can be specific, power,
  • the communication service switching device 4 is configured to switch the communication line, that is, control the connection between the user terminal integrated access device 5 and the optical network unit 3 or the wireless client device 7, so that the control communication service is performed by the optical fiber communication system or the wireless communication system.
  • the switching is controlled by the control module 33 inside the optical network unit 3 through the service interface function module 34, and can be placed independently of the optical network unit 3 or inside the optical network unit 3, that is, integrated with the optical network unit 3.
  • the switching device may specifically adopt an electric switch, an optical switch, a photoelectric switch, a micro mechanical switch or an optical waveguide switch. In a default state, that is, when the optical fiber line of the optical fiber communication system works normally, the user terminal is integrated into the device 5 and the light.
  • the network unit 3 is connected, and the user terminal integrated access device 5 is connected to the wireless client device 7 when the optical fiber is broken.
  • the wireless communication system includes a wireless base station 6 and a wireless client device 7, wherein the wireless base station 6 is in communication connection with the input end of the optical line terminal 1, wirelessly communicates with the wireless client device 7, performs wireless transmission and reception, and wireless resource management, etc. It may be a point-to-point system or a point-to-multipoint system, such as a WiMax system; the wireless client device 7 has an interface connected to the optical network unit 3 and the user terminal integrated access device 5, and is used for the communication line
  • the switched communication service switching device 4 is connected, communicates with the optical network unit 3, realizes information transmission and reception with the optical network unit 3, and realizes information transmission between the wireless base station 6 and the user terminal integrated access device 5.
  • the power meter and/or energy meter detects the power and/or energy of the signals transmitted in the fiber optic communication system while the fiber optic communication system is operating.
  • the power and/or energy of the signal is lower than a preset threshold, it is considered that the optical fiber between the optical line terminal and the optical network unit in the optical fiber communication system is broken, and the communication service switching device switches the communication service from the optical fiber communication system to Wireless communication system.
  • FIG. 2 shows a specific process of the present invention for switching a communication service from a fiber-optic communication system to a wireless communication system, and performing the following steps:
  • Step 201 The power meter detects that the power of the signal transmitted in the optical fiber communication system is less than a preset threshold power, and considers that the signal is lost.
  • Step 2 02 the power meter sends the information of the lost signal to the alarm module;
  • Step 203 The alarm module transmits the signal loss alarm information to the wireless client device.
  • Step 204 The wireless client device sends the information requesting the allocated bandwidth to the wireless base station.
  • Step 205 The wireless base station allocates the corresponding bandwidth to the wireless client device, and sends the Confirmation information that the bandwidth has been allocated;
  • Step 206 The wireless client device sends, to the control module, request information for switching the communication service to the wireless communication system.
  • Step 207 the control module sends a switching control signal to the optical switch.
  • Step 208 The electrical switch switches the communication line connected to the optical network unit to the wireless user equipment according to the switching control signal sent by the control module, so that the uplink signal of the communication service is switched to the wireless user equipment;
  • Step 209 The wireless client device transmits the uplink signal to the wireless base station.
  • Step 210 The radio base station sends the downlink signal to the corresponding wireless user equipment to complete the handover of the communication service line.
  • the power meter in the optical network unit detects that the power of the signal is less than the set threshold power
  • the power meter directly sends the signal loss information to the control module, and the control module controls the optical switch to switch the communication service to the wireless communication.
  • the system proceeds, that is, steps 202 to 206 can be omitted.
  • FIG. 3 shows a specific process of the present invention for switching a communication service from a wireless communication system back to a fiber-optic communication system, and performing the following steps:
  • Step 301 The power meter detects that the power of the signal is higher than a preset threshold power, and considers that the signal is received;
  • Step 302 The power meter sends the information of the received signal to the alarm module.
  • Step 3 03 The alarm module sends a signal for releasing the loss of the signal to the wireless client device.
  • Step 304 the wireless client device sends the bandwidth #put request information to the wireless base station;
  • Step 305 the wireless base station # puts the corresponding bandwidth, and sends the bandwidth release confirmation information to the wireless client device;
  • Step 306 The wireless client device sends, to the control module, request information for switching the communication service to the optical network unit.
  • Step 307 The control module sends a switching control signal to the optical switch.
  • Step 308 The electrical switch switches the communication line connected to the wireless client device to the optical network unit according to the switching control signal sent by the control module, so that the uplink signal of the communication service is switched to the optical network unit.
  • Step 309 The optical network unit transmits the uplink signal of the communication service to the optical line terminal to complete the switching of the communication service line.
  • the power meter in the optical network unit detects that the power of the signal is higher than the set threshold power
  • the power meter directly sends the information of the received signal to the control module, and the control module controls the optical switch to control the communication service. Switching to the fiber-optic communication system, that is, steps 302-306 can be omitted.

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

Abstract

L'invention concerne un réseau d'accès à fibres et un procédé associé de protection de la communication. Ce réseau comprend un système de communication à fibres, un système de communication sans fil et un dispositif de commutation de service de communication. Lorsque la fibre entre le terminal de câble optique dans le système de communication à fibres et l'unité du réseau optique est rompue, le service de communication est commuté, par le dispositif de commutation de service de communication, du système de communication à fibres au système de communication sans fil. Après élimination d'une défaillance, le service de communication est commuté en retour vers le système de communication à fibres par l'intermédiaire du dispositif de commutation de service de communication. La conception du système est simple, une restriction des ressources, comme une architecture en pipeline, un câble etc. peut être surmontée à l'aide du réseau de cette invention. En outre, le réseau de ladite invention permet de contribuer à l'utilisation du dispositif de communication, ainsi, le service de communication du système de communication à fibres est effectivement garanti.
PCT/CN2006/002171 2005-09-12 2006-08-24 Reseau d'acces a fibres et procede associe de protection de communication WO2007030998A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 200510102568 CN100496002C (zh) 2005-09-12 2005-09-12 光纤接入网及其通信保护方法
CN200510102568.5 2005-09-12

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Publication Number Publication Date
WO2007030998A1 true WO2007030998A1 (fr) 2007-03-22

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WO (1) WO2007030998A1 (fr)

Cited By (1)

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CN115811356A (zh) * 2022-12-12 2023-03-17 北京交科公路勘察设计研究院有限公司 一种通信主备光纤数字控制切换***及方法

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CN101296034B (zh) * 2007-04-26 2012-07-11 华为技术有限公司 传输监测信息方法和装置、及无源光网络***
CN105223392A (zh) * 2015-10-30 2016-01-06 国网新疆电力公司电力科学研究院 基于iec62056标准的单相防窃电电能表
CN112019266A (zh) * 2020-08-26 2020-12-01 深圳中科德能科技有限公司 通信链路故障转移方法、装置、终端设备和存储介质
CN114866463A (zh) * 2022-05-11 2022-08-05 中国电信股份有限公司 一种搜索双路由的方法、装置及电子设备

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CN1479460A (zh) * 2003-05-29 2004-03-03 上海交通大学 无源光网络保护方法
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US20020071149A1 (en) * 2000-12-12 2002-06-13 Xu Dexiang John Apparatus and method for protection of an asynchronous transfer mode passive optical network interface
CN1479460A (zh) * 2003-05-29 2004-03-03 上海交通大学 无源光网络保护方法
CN1567749A (zh) * 2003-06-18 2005-01-19 华为技术有限公司 一种无源光网络环网***及断路保护的方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115811356A (zh) * 2022-12-12 2023-03-17 北京交科公路勘察设计研究院有限公司 一种通信主备光纤数字控制切换***及方法
CN115811356B (zh) * 2022-12-12 2023-07-04 北京交科公路勘察设计研究院有限公司 一种通信主备光纤数字控制切换***及方法

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CN1750495A (zh) 2006-03-22
CN100496002C (zh) 2009-06-03

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