WO2008113273A1 - Équipement de multiplexage en longueur d'ondes et procédé de mise en œuvre de la fonction de multiplexage en longueur d'ondes - Google Patents

Équipement de multiplexage en longueur d'ondes et procédé de mise en œuvre de la fonction de multiplexage en longueur d'ondes Download PDF

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Publication number
WO2008113273A1
WO2008113273A1 PCT/CN2008/070345 CN2008070345W WO2008113273A1 WO 2008113273 A1 WO2008113273 A1 WO 2008113273A1 CN 2008070345 W CN2008070345 W CN 2008070345W WO 2008113273 A1 WO2008113273 A1 WO 2008113273A1
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WIPO (PCT)
Prior art keywords
signal
service
processing module
service processing
module
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PCT/CN2008/070345
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English (en)
Chinese (zh)
Inventor
Longbin Liang
Haifan Zhong
Zhihui Tao
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Huawei Technologies Co., Ltd.
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Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008113273A1 publication Critical patent/WO2008113273A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0287—Protection in WDM systems
    • H04J14/0297—Optical equipment protection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/03—WDM arrangements
    • H04J14/0305—WDM arrangements in end terminals

Definitions

  • the present invention relates to a WDM (Wavelength Division Multiplex) system, and more particularly to a wavelength division multiplexing device and a method for implementing the WDM function.
  • WDM Widelength Division Multiplex
  • WDM technology combines two or more optical carrier signals with different wavelengths and carrying various information at the transmitting end through the combiner, and is coupled to the same optical fiber of the optical line for transmission; at the receiving end, the splitter will Optical carriers of various wavelengths are separated to further recover the signals carried therein.
  • the WDM function is usually implemented by a line card.
  • a typical structure of a line card is shown in FIG. 1.
  • the line card includes a multiplexer 110, a splitter 120, and a circuit board 130.
  • the multiplexer 110 and the splitter 120 provide line access through the optical interface, and the multiplexer 110.
  • the splitter board 120 and the circuit board 130 are respectively connected by an optical fiber.
  • the multiplexer 110 includes a multiplexer unit 111 and a multiplexer CPU (Central Process Unit) unit 112.
  • the multiplexer unit 111 couples the multiple single-wavelength optical signals received from the circuit board 130 into one optical combination signal, that is, multiple The wavelength optical signal is sent from the optical fiber interface.
  • the multiplexed CPU unit 112 is mainly composed of a CPU and its peripheral circuits, and is connected to the multiplex unit 111 by a control bus to manage and monitor the multiplex unit 111.
  • the demultiplexing board 120 includes a demultiplexing unit 121 and a demultiplexing CPU unit 122, wherein the demultiplexing unit 121 decouples the multi-wavelength optical signal received from the optical fiber interface into multiple single-wavelength optical signals and outputs the optical signals to the circuit board 130 through the optical fiber;
  • the wave CPU unit 122 is also mainly composed of a CPU and its peripheral circuits, and is connected to the branching unit 121 by a control bus, and manages and monitors the branching unit 121.
  • the circuit board 130 includes a service processing unit 131 and a service CPU unit 132.
  • the service processing unit 131 receives a decoupled optical signal from the demultiplexing board 120, and recovers the branch service signal carried therein, through the branch backplane interface 140. Sent to the tributary board; the service processing unit 131 is connected from the tributary backplane
  • the port 140 receives the branch service signal, converts it into a specific wavelength optical signal and outputs it to the multiplexer 110, and the specific wavelength can satisfy the input wavelength requirement of the multiplexer 110.
  • the line CPU unit 132 manages and monitors the service processing unit 131.
  • the service capacity accessed by the fiber interface on the line card is processed by the circuit board 130.
  • the line card is usually formed into a plurality of PCB (Printed Circuit Board) boards. Its physical structure can be as shown in Figure 2.
  • the multiplexer 110 and the splitter 120 may be formed as a PCB 150 including a fiber optic interface 160 on which the circuit board 130 and the PCB 150 are laminated.
  • the service processing capability of the line card implementing the WDM function is fixed, and the service capacity accessed from the fiber interface is variable. In this way, if the user's access service capacity may subsequently increase, the user may have to purchase a line card that can meet its future needs in advance, or replace the new line card later, and lack the flexibility to increase the service processing capability with the business growth.
  • the embodiments of the present invention provide a wavelength division multiplexing device and a method for implementing the WDM function, which reduce the design workload of the WDM access card, reduce the maintenance cost, and provide a capacity expansion capability that gradually increases with the service.
  • An embodiment of the present invention provides a wavelength division multiplexing device, including an optical integrated device PID module and at least one service processing module, where the PID module is connected to the service processing module by an electrical signal, where: the PID module is used to Converting the multi-wavelength optical signal into a line service signal output to the service processing module, converting the line service signal received from the service processing module into a multi-wavelength optical signal; the service processing module is configured to use the PID module The received line service signal is converted into a branch service signal, and the received branch service signal is converted into a line service signal and sent to the PID module.
  • the embodiment of the invention further provides a method for implementing the WDM function, and performing the following method on the optical integrated device PID module connected to the at least one service processing module:
  • the PID module converts the multi-wavelength optical signal from the access line into a line service signal and outputs the signal to the service processing module;
  • the service processing module converts the received line service signal into a branch service signal output; the service processing module converts the received branch service signal into a line service signal and outputs the signal to the PID module;
  • the PID module converts the line service signal from the service processing module into a multi-wavelength optical signal for output from the access line.
  • the wavelength division multiplexing device is split into a PID (Photonic Integrated Device) module and a service processing module, and the photoelectric conversion is completed on the PID module, so that the PID module can connect multiple signals by electrical signals.
  • the service processing module completes the conversion of the line service signal and the branch service signal, thereby avoiding the multi-layer structure of the wavelength division multiplexing device, or reducing the number of layers of the multi-layer structure, and reducing the workload of the board design; When a module fails, it only needs to replace the faulty module without having to replace the entire device, which reduces maintenance costs. Since the access service capacity of a PID module can be processed by multiple service processing modules, the user can choose to meet the current requirements.
  • the service processing module of the access capacity increases the service processing module when the capacity of the access service grows, and realizes the capacity expansion capacity that gradually grows with the service.
  • FIG. 1 is a schematic structural diagram of a line card for implementing a WDM function in the prior art
  • FIG. 2 is a physical structural diagram of a line card that implements a WDM function in the prior art
  • FIG. 3 is a schematic structural diagram of a PID module in an embodiment of a wavelength division multiplexing device according to the present invention.
  • FIG. 4 is a diagram showing an example of the structure of a multi-wavelength multiplexer unit and an E/O conversion unit of a PID module in an embodiment of a wavelength division multiplexing device according to the present invention
  • FIG. 5 is a schematic structural diagram of a service processing module in an embodiment of a wavelength division multiplexing apparatus according to the present invention
  • FIG. 6 is a schematic diagram showing a physical structure of a PID module and a service processing module in an embodiment of a wavelength division multiplexing apparatus according to the present invention
  • FIG. 7 is a schematic diagram of connection of a backplane interface of a backplane in an embodiment of a wavelength division multiplexing apparatus according to the present invention
  • FIG. 8 is a flowchart of processing of a service processing module by a main control unit in a wavelength division multiplexing apparatus according to the present invention.
  • the interface between the multiplexer board, the branching board, and the circuit board Through the fiber connection, the circuit board and the multiplexer board and the splitter board have only one unified interface, and all the access service capacity of the line card is concentrated on the circuit board for service processing.
  • This centralized implementation leads to a complicated structure of the line card and a fixed service processing capability.
  • the wavelength division multiplexing device is divided into a PID module and a service processing module, and the PID module is mainly responsible for accessing, splitting, combining, and photoelectric conversion of the multi-wavelength optical signal, and the service processing module is mainly responsible for Electrical signals are processed for business.
  • the PID module and the service processing module are connected by electrical signals.
  • the PID module and one or more service processing modules may be connected to form a wavelength division multiplexing device, and multiple sub-frames may use multiple such devices. Wavelength division multiplexing devices are used to access larger capacity services.
  • the PID module converts the accessed multi-wavelength optical signal into a line service signal output to the service processing module, converts the line service signal received from the service processing module into a multi-wavelength optical signal, and manages the signal conversion process of the service processing module through the control signal
  • the service processing module converts the line service signal received from the PID module into a branch service signal under the management of the PID module, and converts the branch service signal into a line service signal and sends the signal to the PID module.
  • the PID module and the service processing module can be respectively formed into boards, and the respective service processing interfaces are connected, and the service processing interface completes the electrical signal connection between the PID module and the service processing module.
  • the connection may be implemented by a connection line between the boards between the service processing interfaces; when the WDM device or the device in which the device is located includes a backplane, the service processing interface may also be a slot on the backplane.
  • the connection between the service processing interfaces is implemented by the traces in the backplane.
  • the PID module may have the structure shown in FIG.
  • the multi-wavelength splitting unit 310 and the multi-wavelength combining unit 340 of the PID module 300 are connected to the access optical fiber.
  • the multi-wavelength splitting unit 310 decouples one multi-wavelength optical signal accessed through the optical fiber. It is a multi-channel single-wavelength optical signal that is output to an O/E (photoelectric) conversion unit 320.
  • the O/E conversion unit 320 photoelectrically converts each optical signal to form a line service signal and sends it to the service processing module, and the service processing module completes the conversion of the line service signal to the branch service signal.
  • the multi-wavelength splitting unit 310 can be implemented by an AWG (Arrayed Waveguide Grating).
  • the main function of the AWG is to divide a multi-wavelength signal into multiple single-wavelength optical signals or combine multiple single-wavelength optical signals into one multi-wavelength.
  • the AWG used to implement the multi-wavelength demultiplexing unit 310 has an input port and a plurality of output ports, which are fabricated in the form of a waveguide, each output The center has a center wavelength and passband, and these center wavelengths and passbands meet the standards.
  • the multi-wavelength demultiplexing unit 310 can also be implemented by other devices having a splitting function, and if necessary, an EDFA (erbium doped fiber amplifier) or an EDWA (erbdoped waveguide amplifier) can be used to compensate the optical loss of the AWG and the like.
  • EDFA erbium doped fiber amplifier
  • EDWA erbdoped waveguide amplifier
  • the O/E conversion unit 320 may include a PD (photodiode) chip and peripheral circuits to implement a function of converting an optical signal into an electrical signal.
  • the multi-wavelength demultiplexing unit 310 and the O/E conversion unit 320 in the PID module 300 are typically packaged as a semiconductor original.
  • the O/E conversion unit 320 may be The data processing unit 330 is connected in series between the service processing interfaces 400.
  • the data recovery unit 330 shapes and/or levels the line traffic signals output by the O/E conversion unit 320 to match the transmission signal format of the service processing interface 400.
  • the data recovery unit 330 generally includes an electrical signal amplifier and an electrical signal clock data recovery circuit for amplifying and regenerating the line service signal to correctly reflect the carried information when the two service processing interfaces 400 reach the service processing module. .
  • the PID module 300 receives the line service signal from the service processing module 400 from the service processing interface 400, and the line service signal is input to the E/0 (electro-optical) conversion unit 350 of the PID module 300.
  • the E/O conversion unit 350 performs electro-optical conversion on the line service signal to form a plurality of single-wavelength optical signals, which are output to the multi-wavelength multiplexing unit 340.
  • the multi-wavelength multiplexer unit 340 couples the multiple single-wavelength optical signals into one multi-wavelength optical combined signal for transmission from the access fiber.
  • An example implementation of the multi-wavelength multiplexer unit 340 and the E/O conversion unit 350 may have the structure shown in FIG. 4 in which the multi-wavelength multiplexer unit 340 is implemented using the arrayed waveguide grating 341.
  • the data channel sub-unit 354 outputs the line service signals from the service processing module to the respective light source link sub-units 351; each of the light source link sub-units 351 is composed of a light source, a modulator module, and light.
  • the switch and the corresponding peripheral circuit and the like are configured to modulate the line signal outputted by the data channel sub-unit 354 into a fixed-wavelength optical signal, and output to the TAP (optical coupler) corresponding to each of the light source link sub-units 351.
  • TAP sub-unit 352 has the functions of a splitter and an optical switch, and can be used in the optical signal output portion of the light source link sub-unit 351, such as 1% output to the link monitoring sub-unit 355 for link monitoring,
  • An optical signal of a certain wavelength can be output to the arrayed waveguide grating 341 or off; the link monitoring sub-unit 355 performs monitoring of each optical signal according to the optical signal split by the TAP sub-unit 352, including monitoring of power, wavelength drift or temperature, and is controlled by the main control unit 370.
  • Information interaction The waveguide array grating 341 couples optical signals of different wavelengths received from the respective TAP sub-units 352 into one multi-wavelength optical signal.
  • the E/O conversion unit 350 and the arrayed waveguide grating 341 in Fig. 4 are usually integrated on the same semiconductor substrate, and each link uses a fixed-wavelength light source whose wavelength can vary with a small range of temperature.
  • the light source may be a DFB (distributed feedback laser) laser or a DBR (distributed Bragg reflector laser) laser, wherein the wavelength of the DFB or DBR laser using InP (indium phosphide) material varies with temperature by 0.1 nm/ °C (nano per degree).
  • Arrayed waveguide grating 341 can also be replaced by other devices, such as Nxl PLC (Planar)
  • Lightwave Circuit Planar Optical Waveguide
  • Waveguide multiplexer star multiplexer
  • MMI Multimode Interference
  • EDFA or EDWA can be used to compensate for AWG and other multiplexers.
  • Light loss if necessary, EDFA or EDWA can be used to compensate for AWG and other multiplexers.
  • the data drive unit 360 is connected in series between the /O conversion unit 350 and the service processing interface 400.
  • the data driving unit 360 performs shaping and/or level conversion on the line traffic signal output by the service processing interface 400 to match the input signal format of the E/O conversion unit 350.
  • the data driving unit 360 amplifies the line service signal to enhance the driving capability of the line service signal.
  • the main control unit 370 in the PID module 300 includes, in addition to other units in the PID module, a multi-wavelength demultiplexing unit 310, an O/E conversion unit 320, a data recovery unit 330, a multi-wavelength multiplexing unit 340, and an E/O conversion unit.
  • the 350 and data driving unit 360 performs operation control and status monitoring, and is also connected to the slave control unit in the service processing module, and manages the service processing module from the control unit, including performing operation control and status monitoring. It can be seen that the service processing interface 400 can not only transmit the line service signal between the PID module 300 and the service processing module, but also can transmit the control signal between the main control unit 370 and the slave control unit in the service processing module.
  • the main control unit 370 typically employs a CPU to implement management functions.
  • the specific management functions of the main control unit 370 for each unit in the PID module 300 may include performance monitoring, initialization, abnormal state alarms, and the like, and the implementation may be performed in the prior art manner, and is not described herein.
  • the service processing module may have the structure shown in FIG.
  • the low rate branch service signal from the tributary board is input by the tributary backplane interface 140 to the service mapping unit 520 of the service processing module 500.
  • the service mapping unit 520 maps the plurality of branch service packages into a high-rate service channel, in other words, maps the branch service signals to line service signals, and sends the line service signals to the PID module.
  • the service demapping unit 530 demaps the line service signal into a tributary service signal, and decapsulates the information transmitted by the high-rate service channel, and restores the low-speed tributary service information, and passes The backplane backplane interface 140 on the backplane is output to the tributary board.
  • the service processing module 500 and the PID module can be connected through the service processing interface 400.
  • the electrical data processing unit 510 is connected in series between the service processing interface 400 and the service mapping unit 520, and is also connected in series between the service processing interface service processing interface 400 and the service demapping unit 530.
  • the electrical data processing unit 510 performs shaping and/or level-converting the input line service signal, including shaping the line service signal from the service processing interface 400 and outputting it to the service demapping unit 530, and from the service mapping unit.
  • the line industry of the 520 is amplified and output to the service processing interface 400.
  • the slave control unit 540 in the service processing module 500 is connected to the master control unit in the PID module by a control signal, and the respective units in the service processing module 500, including the electrical data processing unit 510, the service mapping unit 520, and the instructions of the main control unit.
  • the service demapping unit 530 performs operation control and status monitoring.
  • the service processing module 500 directly manages other units from the control unit 540, and the management operation of the slave control unit 540 is controlled by the main control unit in the PID module, so that the main control unit in the PID module substantially manages the waves.
  • the other units in the multiplexer are divided.
  • the slave control unit 540 may include a CPU or a digital logic circuit, such as an FPGA (Field Programmable Gate Array) and a CPLD (Modular Programmable Logical Device).
  • FPGA Field Programmable Gate Array
  • CPLD Modular Programmable Logical Device
  • the main control unit in the PID module operates the digital logic circuit through a control signal such as an address, a data, an interrupt, etc., including a reset chip, The reporting or the like is interrupted, so that the main control unit completes the management of the business processing module 500.
  • the main control unit can logically load the digital logic circuitry from the control unit 540 when the service interface module 500 is booted.
  • the online status signal of the service processing module 500 may be added to the control signal of the connection between the PID module and the service processing module 500, when the service processing module 500 is online. The status signal will only assume a predetermined state. After the main control unit learns that a certain service processing module 500 is online, the digital logic circuit of the service processing module 500 is loaded, each unit on the service processing module 500 is initialized, and the service processing module 500 is started to work.
  • the online status signal line of the service processing module can be connected to the PID module main control unit, which is grounded on the service processing module and connected to the power supply on the PID module.
  • the online state signal line of the service processing module changes from a high level to a low level on the PID module, so that the main control unit of the PID module knows the service processing.
  • the module is online.
  • the PID module 300 and the service processing module 500 may have the physical structure shown in Fig. 6.
  • the PID module 300 has a fiber optic interface 160 connecting a multi-wavelength splitting unit and a multi-wavelength combining unit for inputting and outputting a multi-wavelength optical signal to the PID module.
  • the PID module 300 is inserted into the service processing interface on the backplane, and the service processing module 500 is inserted into the service processing interface and the branch backplane interface on the backplane.
  • the backplane may have multiple interfaces connected to the PID module and multiple interfaces connected to the service processing module, and each PID module is respectively connected to one to multiple service processing modules.
  • the backplane includes an interface 720 connecting the PID module and five interfaces 710 connecting the service processing modules, and the interface 720 connecting the PID modules is respectively connected to the interface 710 of each connection service processing module.
  • the connection signal includes a line traffic signal and a control signal.
  • the PID module and the service processing module can be respectively inserted into the corresponding interfaces, and the PID module can automatically identify which interface is inserted into the service processing module from the online status signal line, and automatically perform logical loading, chip initialization, and start the business processing module work.
  • a service accessed by a PID module may be processed by multiple service processing modules, and the service processing modules may have the same or different service processing capacity; when the access service capacity increases, a new service processing module may be inserted to complete Add some of the business processing, so that you can flexibly select and configure the business processing module according to the actual application requirements, while taking into account cost and performance.
  • the service processing module can be made into a board with a unified backplane interface, so that any one of the service processing modules can be replaced separately, which reduces maintenance costs. It is also possible to further make the business processing modules into the same board to reduce the types and quantities of spare parts.
  • the wavelength division multiplexing device includes a PID module and three service processing modules, and the PID module has a service access capacity of 120 Gbps (gigabits per second;), which is carried by 12 wavelengths, and each wavelength transmits 10G;
  • the processing service capacity of the service processing module is 40 Gbps, so that the three service processing modules just complete the business processing of the PID module.
  • the processing service capacity of the three service processing modules may also be different, such as 50 Gbps, 40 Gbps, and 30 Gbps, or 60 Gbps, 40 Gbps, and 20 Gbps, or 50 Gbps, 50 Gbps, and 50 Gbps, which are convenient for future access capacity. upgrade.
  • the PID module converts the multi-wavelength optical signal of the access line into a line service signal, and outputs the line service signal to the service processing module; the service processing module converts the line service signal into a branch service signal output to the branch under the management of the PID module. Road board.
  • the service processing module receives the branch service signal from the tributary board under the management of the PID module, converts the received branch service signal into a line service signal, and outputs the signal to the PID module; the PID module
  • the line service signal is converted into a multi-wavelength optical signal, and the multi-wavelength optical signal is output from the access line.
  • the main control unit of the PID module manages the conversion between the multi-wavelength optical signal and the line service signal, and manages the conversion between the line service signal of the service processing module and the branch service signal through the slave control unit on the service processing module.
  • the main control unit of the PID module can control a certain service processing module by using the flow shown in Figure 8 to implement the WDM function.
  • the control signal between the PID module and the service processing module includes the online status signal of the service processing module, step S810 to step S830 are performed.
  • Step S810 The main control unit reads the online status signal of the connected service processing module after powering on.
  • the online status signal of each service processing module is unique to the main control unit, and the main control unit can not only determine whether the corresponding service processing module is online or offline through the online status signal, but also can use the online status signal as a different service processing module.
  • the logo identifies the various online business processing modules.
  • Step S820 The main control unit determines, by the status signal, whether the service processing module is in an online state, and if yes, proceeds to step S830; if not, ends the processing on the service processing module.
  • Step S830 Start the service processing module in the online state to work. If the business processing module
  • the slave control unit includes a CPU, and the master control module can instruct the slave controller to initialize the service processing module.
  • the slave control unit of the service processing module is a digital logic circuit
  • the main control unit loads the digital logic circuit online and instructs it to complete the initialization of the service processing module; the main control unit uses the address, data, interrupt, etc.
  • the logic circuit operates.
  • the main control unit can allocate its processing resources according to the actual situation during the loading and / or initialization process to prevent the interruption of the existing services caused by the excessive processing resources occupied by the loading and / or initialization process.
  • Step S840 The main control unit manages the conversion of the line service signal of the service processing module and the branch service signal by the slave control unit.
  • the management of the service processing module may include operation control and status monitoring, such as service performance monitoring, initialization control, and alarm processing.
  • the main control unit can be notified by means of the interrupt mode. After receiving the interrupt, the main control unit performs protection switching of the service to ensure the service switching time. At this time, the main control unit can execute step S850 and step S860.
  • Step S850 Receive an offline interrupt of the service processing module when the service processing module is offline.
  • the status of the online status signal changes from online to offline; the PID module can learn that the service processing module is offline according to the status change, and can further generate an interrupt signal according to the status change, and notify the main control unit.
  • Step S860 Switch the line service signal protection to another online service processing module.
  • the main control unit also manages the conversion between the multi-wavelength optical signal and the line service signal on the PID module, including operation control and status monitoring, such as service performance monitoring. , initialization control, alarm processing, etc.
  • the service processing module can be flexibly configured according to the size of the access traffic, and the service processing module is added when the access traffic is increased.
  • the upgrade and the expansion are convenient, and the existing services are not affected.
  • Wavelength optical signal access reduces the operation of the fiber link; when the service processing module fails, the faulty module can be replaced independently, and the spare part cost and maintenance cost are low; the PID module and the service processing module are independently powered, and the service can be processed when not in use.
  • the module is offline, which reduces the power consumption of the whole machine; the PID module and the business processing module have a simple structure, and it is not necessary to consider the structural relationship of the stack when designing the board, thereby reducing the design complexity.

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Abstract

La présente invention concerne un équipement de multiplexage en longueur d'ondes. Il comprend un module à dispositif photonique intégré (300) ou 'PID' (Photonic Integrated Device) et au moins un module de traitement du trafic (500). Le module PID (300) se connecte au module de traitement du trafic par l'intermédiaire du signal électrique. En outre, le module PID (300) sert, d'une part à prendre le signal optique multi-longueurs d'ondes à le convertir en signal de trafic de ligne et à le produire en sortie au profit du module de traitement de trafic (500), et d'autre part à prendre le signal de trafic de ligne reçu en provenance du module de traitement de trafic (500) et à le convertir en signal optique multi-longueurs d'ondes. Le module de traitement de trafic (500) sert, d'une part à prendre le signal de trafic de ligne reçu en provenance du module PID (300) et à le convertir en signal de trafic de branche, et d'autre part à prendre le signal du trafic de branche, à le convertir en signal de trafic de ligne et à la produire en sortie au profit du module PID (300). L'invention concerne également un procédé de mise en œuvre de la fonction de multiplexage en longueur d'ondes, le module PID (300) pouvant se connecter à plusieurs modules de traitement du trafic (500) pour mettre en œuvre le traitement du trafic. Ainsi, d'une part, en cas de défaillance de certains modules, seuls les modules en panne sont à changer, et d'autre part, en cas d'augmentation de la capacité du trafic en accès, il est possible d'ajouter le module de traitement du trafic (500).
PCT/CN2008/070345 2007-03-19 2008-02-22 Équipement de multiplexage en longueur d'ondes et procédé de mise en œuvre de la fonction de multiplexage en longueur d'ondes WO2008113273A1 (fr)

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CN2007100874956A CN101030831B (zh) 2007-03-19 2007-03-19 波分复用装置及实现波分复用功能的方法

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