CN112953641A - OPEN-WDM device and control method - Google Patents
OPEN-WDM device and control method Download PDFInfo
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- CN112953641A CN112953641A CN202110176392.7A CN202110176392A CN112953641A CN 112953641 A CN112953641 A CN 112953641A CN 202110176392 A CN202110176392 A CN 202110176392A CN 112953641 A CN112953641 A CN 112953641A
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- 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
- H04B10/25—Arrangements specific to fibre transmission
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- 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
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
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- 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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
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Abstract
The invention discloses an OPEN-WDM device and a control method, the device comprises a main frame, a power supply board and a main control board, wherein the power supply board and the main control board are arranged in the device; a heat dissipation plate is arranged on the side surface of the main machine frame; the input end of the power supply board is connected with an external power supply, and the output end of the power supply board is connected with the main control board and the active service board; the active service board and the passive multiplexer/demultiplexer are both connected with the main control board. The invention supports the mixed deployment of active, semi-active and passive schemes, and reduces the space occupation; on the premise of not changing the original passive WDM equipment, the introduction of a monitoring function is supported, and the function upgrade is realized; the total insertion loss of the equipment is reduced by bundling and fiber outputting; and the electric power storage module is added on the active service board, so that the protection switching function can be normally completed under the condition that the main equipment is powered off.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to 4G/5G OPEN-WDM equipment for network forward transmission/intermediate transmission/return transmission and a control method.
Background
With the arrival of the 5G era, all operators are accelerating to build a 5G network; at present, the technical evolution of 5G forwarding has evolved from the traditional gray-light optical fiber direct-drive scheme before 4G to the passive WDM scheme, and recently, various large operators have vigorously advanced the semi-active WDM scheme to enhance management and control and provide link protection.
The key point of the semi-active WDM scheme is that a protection link is added on the basis of the passive WDM scheme, and the protection link can be switched to a standby link when the optical fiber of a main link fails, so that the service is ensured to be not disconnected, and the communication is not influenced; secondly, the management and control are enhanced, and the optical module state information and the manufacturer information of the local side and the remote side are monitored by arranging the active WDM equipment and the functional board cards on the local side.
At present, in the actual deployment of the basic 5G base station, a situation that the passive WDM scheme and the semi-active WDM scheme are deployed simultaneously exists in a large amount within a certain period, and the existing equipment and machine frame do not support the mixed insertion of all active service boards of the passive wavelength division multiplexer and the semi-active WDM scheme used in the passive WDM scheme for a while, so that the passive multiplexer and the passive multiplexer of the passive WDM scheme and the service boards of the semi-active WDM scheme need to occupy one rack space respectively and be independently and intensively placed, which inevitably causes space waste, and the disadvantage is highlighted on the premise that the deployment resources of the machine room are short.
Compared with a semi-active WDM scheme, the existing passive WDM scheme has a lot of inconvenience in fault location and maintenance management due to no monitoring, and the OPEN-WDM equipment can provide a simple monitoring method based on semi-active system equipment
In the semi-active WDM scheme, a protection link is added, and 50% of light is required to be split into two paths through an optical splitter and transmitted on each main/standby route after wave combination, so that at least 4dB of loss is introduced, and in addition, in order to realize a monitoring function, each path is required to distribute about 1% -5% of light to a monitoring PD of each channel, so that the total insertion loss of a system of the semi-active scheme is at least 4.5dB greater than that of a passive scheme, the existing semi-active scheme mainly starts from the main aspects of improving the transmission optical power, reducing the emission and dispersion costs, improving the receiving sensitivity and the like, the actual optical fiber connection mode has fresh requirements, most of the existing connection modes are LC flange movable joints, and each LC flange movable joint can introduce about 0.5dB of insertion loss in each channel.
The system loss and power budget of the semi-active WDM scheme need to satisfy the following conditions
POW-SEN-E≥T+IC+IM+M
Wherein: POW is the transmitted optical power; SEN is the receiving sensitivity; e is the cost of transmission and dispersion; t is transmission (fiber contains fusion) loss; IC is total loss of a movable connector (a flange interface and an optical switch); IM is the wavelength division multiplexing/demultiplexing insertion loss (semi-active system OLP splitting causes loss calculation in this term); m is maintenance redundancy.
Disclosure of Invention
The invention aims to solve the technical problem of providing an OPEN-WDM device and a control method aiming at the defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention provides an OPEN-WDM device, one end of the device is connected with a main path composite wave optical signal at a far end through an optical fiber, and the other end of the device is connected with an optical module at a local end; the equipment comprises a main machine frame, a power supply board and a main control board, wherein the power supply board and the main control board are arranged in the equipment; a heat dissipation plate is arranged on the side surface of the main machine frame; the input end of the power supply board is connected with an external power supply, and the output end of the power supply board is connected with the main control board and the active service board; the active service board and the passive multiplexer/demultiplexer are both connected with the main control board; the remote composite wave optical signal is accessed to the passive composite wave separator through the main control board, the branch optical signal after passing through the passive composite wave separator is connected with the optical module and carries out signal feedback, and the branch optical signal separated from the branch optical signal is accessed to the main control board for monitoring; the method comprises the following steps that a wave-combining optical signal at a far end is accessed to an active service board, a branch optical signal behind the active service board is connected with an optical module and carries out signal feedback, and a branch optical signal separated from the branch optical signal is monitored through the active service board;
the customized panel is provided with an inner frame, an outer frame and mounting bolts; the inner frame is arranged in the outer frame, and the passive multiplexer/demultiplexer is arranged through the inner frame; the mounting bolt sets up on the frame, and the frame can be dismantled, dismantles the frame after, and active business board is installed in this business draw-in groove.
Furthermore, the active service board is provided with an optical fiber bundle, and the active service board realizes a fiber outlet mode of the bundle fiber through the optical fiber bundle.
Furthermore, the fiber outgoing mode of the passive multiplexer/demultiplexer of the present invention includes the following two modes:
the passive combiner-splitter is provided with an optical fiber bundle, and the passive combiner-splitter realizes the fiber outlet mode of the bundle fiber through the optical fiber bundle;
and a plurality of LC flange interfaces are arranged on the passive combiner-splitter, and the passive combiner-splitter outputs fibers through the LC flange interfaces.
Furthermore, the equipment of the invention also comprises a network management server, and the main control board is connected with the network management server.
Furthermore, the main control board of the invention comprises a plurality of COM interfaces, a plurality of optical splitters, a first MEMS optical switch, a first microprocessor MPU, a first APD, a first TIA, a management and control system and interfaces; the equipment is also internally provided with an equipment serial port; wherein:
the passive combiner-splitter is connected with one group of COM interfaces and optical splitters on the main control board, the remote passive WDM network is connected with the other group of COM interfaces and optical splitters on the main control board, and the two optical splitters are connected with each other to form a passive WDM signal channel; a shunt optical signal is respectively branched from the two optical splitters and is connected to a first MEMS optical switch, one end of the first MEMS optical switch is connected with a first microprocessor MPU through a first APD and a first TIA, and the other end of the first MEMS optical switch is directly connected with the first microprocessor MPU; one end of the first microprocessor MPU is connected with the network management server through the management and control system and the interface, and the other end of the first microprocessor MPU is connected with the serial port of the equipment.
Furthermore, the active service board of the invention comprises a semi-active WDM module, a second MEMS optical switch, a second APD, a second TIA, a second microprocessor MPU, and an electric storage module; still be provided with the equipment serial ports in this equipment, wherein:
the wave-combining optical signal of the far end is subjected to wave splitting through the semi-active WDM module, and the wave-splitting optical signal sent out by the local end is subjected to wave-combining output through the semi-active WDM module; the optical splitting signal of each branch optical signal output by the semi-active WDM module is connected with a second MEMS optical switch, and one end of the second MEMS optical switch is connected with a second microprocessor MPU through a second APD and a second TIA; the branch optical signals separated from the trunk multiplex optical signals on the semi-active WDM module are connected to a second microprocessor MPU for monitoring, and each branch optical signal on the second MEMS optical switch is connected to the second microprocessor MPU for monitoring; and the second microprocessor MPU is connected with the electric storage module, and both the second microprocessor MPU and the electric storage module are connected with the serial port of the equipment.
Furthermore, the semi-active WDM module is provided with a main circuit COM interface, a standby circuit PRO interface and a multi-stage filter, and each stage of filter is connected with a fiber outlet end through a light splitter; wherein:
the method comprises the following steps that a composite wave optical signal at a far end is input through a main path and an auxiliary path of a semi-active WDM module, and the main path and the auxiliary path respectively output a PD monitoring signal through an optical splitter; the combined wave optical signal passes through the filter plates with all wavelengths step by step, and each wavelength only passes through the filter plate with the corresponding wavelength in a transmission way, otherwise, the combined wave optical signal is reflected to a filter channel of the next stage; the combined wave optical signal is decomposed into multiple branch optical signals with independent wavelengths, and a branch optical signal is separated from each branch through an optical splitter for monitoring; and the branch optical signals sent by the local side are converged and combined after passing through the corresponding filter plate and then output to the remote side, and each branch of the local side is also divided into a branch optical signal by the optical splitter for monitoring.
Further, the branched optical signals for monitoring on the active service board and the main control board of the present invention both use 3% to 5% of light split, preferably 3%.
The invention provides a control method of OPEN-WDM equipment, which comprises the following steps:
the far-end wave-combining optical signal is input to an active service board or a passive wave-combining and splitting device for wave-splitting processing and is transmitted to a local side; the wave splitting optical signal of the local side is input to an active service board or a passive wave combining and splitting device for wave combining processing and is transmitted to a far end; through the combination of the active service board and the passive multiplexer/demultiplexer on the equipment, three working modes are realized: a power supply mode, a battery supply mode and a power off mode;
in a power supply mode:
the active service board and the main control board are powered through the power supply board;
the optical signal of the active service board is monitored by a microprocessor on the active service board, and the method comprises the following steps: monitoring a main path of the far-end wave-combined optical signal, monitoring a standby path of the far-end wave-combined optical signal and monitoring optical signals of all branch paths;
the microprocessor through the main control board monitors the optical signal of the passive multiplexer/demultiplexer, including: monitoring a main path of the optical signal combined with the far end and monitoring a main path of the optical signal combined with the local end;
protection switching is carried out on the active service board through a microprocessor on the active service board, and if the main path optical signal is abnormal, the standby path optical signal is switched;
in a battery-powered mode:
the power storage module supplies power to the active service board;
the communication services of the active service board, the passive multiplexer/demultiplexer and the far end are not influenced;
the communication functions of the active service board, the passive multiplexer/demultiplexer and the main control board are all interrupted, and the power storage module of the active service board is used for ensuring the normal operation of the protection switching function of the main path optical signal and the standby path optical signal of the active service board;
in a power-down mode:
the electric quantity of the electric storage module is exhausted;
the active service board, the passive multiplexer/demultiplexer and the far-end communication service are not affected, and at the moment, the network main link is a channel before the power storage module stops working;
the monitoring functions of the active service board and the passive multiplexer/demultiplexer are interrupted, and the protection switching function of the active service board is also interrupted.
The invention has the following beneficial effects: the invention discloses OPEN-WDM equipment and a control method thereof, wherein (1) compatible deployment of board cards and equipment is realized by supporting different deployment schemes, so that the space occupation is reduced; (2) the method for realizing the monitoring of the passive WDM scheme is innovatively provided, original equipment is not changed on the basis of the existing passive WDM scheme, an optical power monitoring function is introduced, and smooth upgrading is supported; (3) aiming at the problems of large system loss and insufficient power budget of a semi-active scheme, a fiber output mode of bundled fibers is innovatively provided in an optical fiber connection mode, one connecting flange can be reduced at each end, the connection insertion loss is reduced, and the power budget pressure of the semi-active system is relieved; (4) the invention is suitable for different networking modes, and the networking models such as passive WDM, semi-active WDM and active WDM are all suitable, and are mixed and compatible, and the hybrid access of different schemes is supported; (5) the semi-active service board card is configured with an electric storage module, the equipment is charged when in normal operation, full electric quantity is kept all the time, and the functions of protection switching and network management monitoring can be normally realized; when the whole equipment is powered off, the semi-active service board card power storage module supplies power, the protection switching function can be normally realized, and the service communication is not influenced; when the whole equipment is powered off and the electric quantity of the electric storage module is exhausted, the service communication of the semi-active service board card is not influenced; (6) the invention introduces the program-controlled MEMS optical switch, switches the monitoring channel through the MEMS optical switch, and reduces the hardware configuration of the monitoring PD.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of an OPEN-WDM apparatus configuration in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of a custom panel structure according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a master control board of an embodiment of the invention;
fig. 4 is a schematic diagram of an active service board of an embodiment of the present invention;
FIG. 5 is a schematic diagram of a semi-active WDM module of an embodiment of the present invention;
in the figure: 1-a main machine frame; 2-a power supply board; 3, a main control board; 4-a heat sink; 5-active service board; 6-a passive multiplexer/demultiplexer; 7-customizing the panel; 8-optical fiber bundling; 9-LC flange interface; 10-a network management server; 11-equipment serial port; 301-COM interface; 302-a plurality of optical splitters; 303-a first MEMS optical switch; 304-a first microprocessor MPU; 305-a first APD; 306-a first TIA; 307-management and control system and interface; 501-semi-active WDM module; 502-a second MEMS optical switch; 503-a second APD; 504-a second TIA; 505-a second microprocessor MPU; 506-an electric storage module; 701-an inner frame; 702-an outer frame; 703 mounting bolts.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the OPEN-WDM device of the embodiment of the invention, the OPEN-WDM complete network consists of WDM device, WDM network and network management server 10; where the WDM network includes a plurality of networking modes, passive WDM, semi-active WDM, and active WDM are listed herein.
As shown in fig. 1, the OPEN-WDM apparatus supports centralized compatible deployment of passive WDM and semi-active WDM schemes, supports mixed insertion, and improves deployment flexibility and diversity. The equipment comprises a main machine frame 1, a power supply board 2 and a main control board 3, wherein the main machine frame 1 is provided with a plurality of service clamping grooves, a plurality of active service boards 5 and a plurality of customized panels 7 are arranged in the service clamping grooves, and a passive multiplexer/demultiplexer 6 is arranged in the customized panels 7; a heat dissipation plate 4 is arranged on the side surface of the main machine frame 1; the input end of the power supply board 2 is connected with an external power supply, and the output end is connected with the main control board 3 and the active service board 5; the active service board 5 and the passive multiplexer/demultiplexer 6 are both connected with the main control board 3.
In the preferred embodiment of the present invention, the active service board 5 is provided with the optical fiber bundle 8, and the active service board 5 implements a fiber output mode of the bundle fiber through the optical fiber bundle 8.
The fiber outgoing mode of the passive multiplexer/demultiplexer 6 includes the following two modes:
the passive combiner-splitter 6 is provided with an optical fiber bundle 8, and the passive combiner-splitter 6 realizes the fiber outlet mode of the bundle fiber through the optical fiber bundle 8;
the passive combiner-splitter 6 is provided with a plurality of LC flange interfaces 9, and the passive combiner-splitter 6 outputs fibers through the LC flange interfaces 9.
As shown in fig. 2, the custom panel 7 is provided with an inner frame 701, an outer frame 702 and mounting bolts 703; the inner frame 701 is arranged in the outer frame 702, and the passive multiplexer-demultiplexer 6 is installed through the inner frame 701; the mounting bolts 703 are arranged on the outer frame 702, the outer frame 702 is detachable, and after the outer frame 702 is detached, the active service board 5 is mounted in the service card slot.
As shown in fig. 3, the main control board 3 includes a plurality of COM interfaces 301, a plurality of optical splitters 302, a first MEMS optical switch 303, a first microprocessor MPU304, a first APD305, a first TIA306, a management and control system, and an interface 307; the equipment is also internally provided with an equipment serial port 11; wherein:
the passive combiner-splitter 6 is connected with a group of COM interfaces 301 and optical splitters 302 on the main control board 3, a remote passive WDM network is connected with another group of COM interfaces 301 and optical splitters 302 on the main control board 3, and the two optical splitters 302 are connected with each other to form a passive WDM signal channel; a branch optical signal is respectively branched from the two optical splitters 302 and is connected to a first MEMS optical switch 303, one end of the first MEMS optical switch 303 is connected with a first microprocessor MPU304 through a first APD305 and a first TIA306, and the other end of the first MEMS optical switch is directly connected with the first microprocessor MPU; the first microprocessor MPU304 has one end connected to the network management server 10 via the management and control system and the interface 307, and has the other end connected to the device serial port 11.
The passive combiner-splitter 6 of the passive WDM system supports the smooth upgrade of the prior art, and in the system connection mode, the COM port is connected to the LC flange adapter of the main control board 3, and then is connected to the COM port of the passive combiner-splitter at the opposite end by the LC flange adapter corresponding to the other end; after the optical fibers of the two-end multiplexer/demultiplexer are connected into the main control board 3, 3-5% of light is split to the branch paths through one TAP optical splitter respectively, and the mutual transmission and intercommunication of the main paths are not affected.
The same applies to the connection of a plurality of sets of passive WDM systems, and LC flange adapter ports of the main control board 3 are uniformly accessed; a monitoring PD (preferably an APD type with higher sensitivity) is integrated in the main control board, and the monitoring PD is connected with each monitoring path through 1-to-8 channel (1: 16, 1:32 or even more channel optical switches can be optionally matched as required).
After the monitoring PD is connected to the corresponding path, the monitoring PD receives the optical signal transmitted in the opposite direction, and outputs the optical signal to the first microprocessor MPU304 of the main control board through the integrated TIA and the signal conversion module, so that the optical power information on the corresponding path can be acquired in real time through the network management system, and the connection quality of the system can be diagnosed.
In the preferred embodiment of the invention, the passive WDM network is connected to the OPEN-WDM equipment through the LC port on the main control board 3, and 3% of optical signals are dropped from two ends of each set of passive WDM network through the equipment for monitoring; supporting the access of a plurality of sets of passive WDM networks; the branch optical signals of each passive WDM network are switched and connected through a programmable first MEMS optical switch 303, and the first MEMS optical switch 303 can be set to traverse and connect each access channel according to a certain time interval; after the monitoring channel is communicated, the monitoring optical signal is input to a monitoring first PD305, is subjected to integrated amplification processing by a first TIA306 and then is converted into a digital signal which is input to a first microprocessor MPU 304; the first microprocessor MPU304 reports the collected monitoring information to the management and control system and the interface 307, and then a maintenance person can remotely access the management and control system and the interface 307 through the network management server 10 to obtain the optical power information of each passive WDM network, thereby realizing the optical power monitoring of each trunk of each passive WDM network.
The above mode of acquiring the monitoring information is passive acquisition, and is obtained by actively reporting a monitored object; the system also supports active acquisition of monitoring information, a maintenance worker accesses the management and control system and the interface 307 through the network management server 10, a monitoring instruction of a fixed channel is sent down, the first microprocessor MPU304 transmits the instruction to the first MEMS optical switch 303 at that time, the first MEMS optical switch 303 is switched to a channel to be monitored according to the instruction of the management and control system 307, communication of the monitoring channel is achieved, and then the monitoring information is transmitted to the network management server through the mode.
That is, the monitoring information supports reporting by traversing and connecting each access channel through the optical switch 303, and also supports switching to a designated channel for collecting and reporting after receiving the instruction.
As shown in fig. 4, the active service board 5 includes a semi-active WDM module 501, a second MEMS optical switch 502, a second APD503, a second TIA504, a second microprocessor MPU505, and an electric storage module 506; still be provided with equipment serial ports 11 in this equipment, wherein:
the remote composite wave optical signal is subjected to wave splitting through the semi-active WDM module 501, and composite wave output is carried out on the composite wave optical signal sent out by the local end through the semi-active WDM module 501; the optical splitting signal of each branch optical signal output by the semi-active WDM module 501 is connected to a second MEMS optical switch 502, and one end of the second MEMS optical switch 502 is connected to a second microprocessor MPU505 through a second APD503 and a second TIA 504; the branch optical signals separated from the trunk multiplexing optical signals on the semi-active WDM module 501 are connected to the second microprocessor MPU505 for monitoring, and each branch optical signal on the second MEMS optical switch 502 is connected to the second microprocessor MPU505 for monitoring; the second microprocessor MPU505 is connected to the electric storage module 506, and both the second microprocessor MPU505 and the electric storage module 506 are connected to the device serial port 11.
As shown in fig. 5, the semi-active WDM module 501 is provided with a main circuit COM interface, a backup circuit PRO interface, and a multi-stage filter, and each stage of filter is connected to the fiber outlet end through a splitter; wherein:
the composite wave optical signal of the far end is input through the main path and the standby path of the semi-active WDM module 501, and the main path and the standby path output a PD monitoring signal through an optical splitter respectively; the combined wave optical signal passes through the filter plates with all wavelengths step by step, and each wavelength only passes through the filter plate with the corresponding wavelength in a transmission way, otherwise, the combined wave optical signal is reflected to a filter channel of the next stage; the combined wave optical signal is decomposed into multiple branch optical signals with independent wavelengths, and a branch optical signal is separated from each branch through an optical splitter for monitoring; and the branch optical signals sent by the local side are converged and combined after passing through the corresponding filter plate and then output to the remote side, and each branch of the local side is also divided into a branch optical signal by the optical splitter for monitoring.
The scheme of the embodiment of the invention is mainly different from the traditional active service board by the following three points:
firstly, the detection PD of each shunt circuit is cancelled in each branch circuit of the semi-active WDM module, the monitoring of each channel is realized by switching the monitoring channel through the MEMS optical switch, the monitoring PD of the branch circuit is saved, and the utilization rate of the monitoring PD is improved.
And secondly, an electric storage module is added, so that the protection switching function can be realized through the service board card under the condition of power failure and network disconnection.
And thirdly, the fiber outlet mode is changed into fiber bundling, and each channel saves one movable joint, thereby reducing the system loss.
In the preferred embodiment of the invention, the semi-active service board card is configured with an electric storage module, the equipment is charged when working normally, the full electric quantity is kept all the time, and the functions of protection switching and network management monitoring can be realized normally; when the whole equipment is powered off, the semi-active service board card power storage module supplies power, the protection switching function can be normally realized, and the service communication is not influenced; when the whole equipment is powered off and the electric quantity of the electric storage module is exhausted, the service communication of the semi-active service board card is not influenced.
When a main link of the semi-active WDM system fails, a PD on a service board card monitors that an optical power value crosses a line and is lower than a threshold value, switching is automatically triggered, a built-in optical switch is switched to a standby channel to ensure that the service is not disconnected, and the switching time is within 50ms, preferably within 20 ms.
The semi-active WDM module 501 works as follows:
the remote composite wave optical signals (with the wavelengths of lambda 2, lambda 4 and lambda 6) are accessed through the main path COM port and the standby path PRO port of the semi-active WDM module 501, and the MEMS optical switch in the semi-active WDM module 501 is connected with the main path COM port by default; the combined wave optical signal enters through the COM port and then is split into 3% of light through the optical splitter for monitoring, and is processed and monitored through the microprocessor 505 of the active service board 5, and two channels (the COM port and the PRO port) of the trunk line need real-time monitoring so as to be convenient for quick response and quick switching after a certain link fails, so that the trunk line is monitored in real time through an independent monitoring PD after being split; the combined wave optical signal passes through the WDM network step by step and relates to the filter with all wavelengths (lambda 1-lambda 6), each wavelength can only be transmitted through the filter with the corresponding wavelength, otherwise, the combined wave optical signal is reflected to the next stage of filter channel, the combined wave optical signal at the far end is decomposed into three independent wavelength branches (with the wavelengths lambda 2, lambda 4 and lambda 6) after passing through the semi-active WDM module 501, and 3% optical signals are separated from each branch through the optical splitter to monitor the performance of the corresponding wave band.
In a similar way, the branch optical signals (with wavelengths of λ 1, λ 3, λ 5) sent by the office end directly pass through the corresponding filters and then converge and combine the waves to be output to the far end through the MEMS optical switch path, so that the office end and the far end can communicate with each other, and 3% of the optical signals on the three branches of the office end are respectively separated by the optical splitters to perform performance monitoring of the corresponding bands.
The control method of the OPEN-WDM equipment comprises the following steps:
the far-end wave-combining optical signal is input to an active service board or a passive wave-combining and splitting device for wave-splitting processing and is transmitted to a local side; the wave splitting optical signal of the local side is input to an active service board or a passive wave combining and splitting device for wave combining processing and is transmitted to a far end; through the combination of the active service board and the passive multiplexer/demultiplexer on the equipment, three working modes are realized: a power supply mode, a battery supply mode and a power off mode;
in a power supply mode:
the active service board and the main control board are powered through the power supply board;
the optical signal of the active service board is monitored by a microprocessor on the active service board, and the method comprises the following steps: monitoring a main path of the far-end wave-combined optical signal, monitoring a standby path of the far-end wave-combined optical signal and monitoring optical signals of all branch paths;
the microprocessor through the main control board monitors the optical signal of the passive multiplexer/demultiplexer, including: monitoring a main path of the optical signal combined with the far end and monitoring a main path of the optical signal combined with the local end;
protection switching is carried out on the active service board through a microprocessor on the active service board, and if the main path optical signal is abnormal, the standby path optical signal is switched;
in a battery-powered mode:
the power storage module supplies power to the active service board;
the communication services of the active service board, the passive multiplexer/demultiplexer and the far end are not influenced;
the communication functions of the active service board, the passive multiplexer/demultiplexer and the main control board are all interrupted, and the power storage module of the active service board is used for ensuring the normal operation of the protection switching function of the main path optical signal and the standby path optical signal of the active service board;
in a power-down mode:
the electric quantity of the electric storage module is exhausted;
the active service board, the passive multiplexer/demultiplexer and the far-end communication service are not affected, and at the moment, the network main link is a channel before the power storage module stops working;
the monitoring functions of the active service board and the passive multiplexer/demultiplexer are interrupted, and the protection switching function of the active service board is also interrupted.
In a preferred embodiment of the present invention, the functions of the active service board 5 include:
(1) protection switching function:
when the main link fails, the PD1 of the main COM port monitors that the optical signal is abnormal, the second microprocessor MPU505 will quickly issue a switching instruction, generally within 50ms, preferably 20ms, the link switching terminal user in this time is unaware, and the service is basically not affected; after the second microprocessor MPU505 issues the switching instruction, the MEMS optical switch of the semi-active WDM module 501 is quickly switched to the backup PRO port;
the switching logic supports automatic switching, manual switching, forced switching and the like, and defaults to automatic switching;
the threshold of switching can be set, the threshold setting of the main/standby optical power difference threshold is supported, the threshold of the default channel is-10 dBm, and the threshold of the optical power difference value of the default main/standby channel is 5 dB.
The instructions and settings support issuing through the network management server 10; when the network management server 10 or the device does not work or is abnormal, the power supply execution default value or the previous setting value through the power storage module 506 is supported.
(2) And (4) a monitoring function:
3% of light is distributed from each branch of the semi-active WDM module 501 for performance monitoring, each branch optical signal is switched and connected through a programmable second MEMS optical switch 502, and the second MEMS optical switch 502 can be set to traverse and connect each access channel according to a certain time interval; after the monitoring channel is communicated, the monitoring optical signal is input to a monitoring second PD503, is integrated and amplified by a second TIA504 and then is converted into a digital signal which is input to a second microprocessor MPU 505; the second microprocessor MPU505 transmits the collected monitoring information to the management and control system and the interface 307 of the main control board 3 through the device backplane serial port 11, and then the maintenance personnel can remotely access the management and control system and the interface 307 through the network management server 10 to obtain the reported optical power information of each path on the active service board, and as the multiple paths of semi-active WDM networks are accessed, the multiple paths of semi-active service board are connected to the main control board 3 through the device backplane serial port 308.
The device realizes the performance monitoring of each trunk and each branch of the semi-active WDM network;
the above mode of acquiring the monitoring information is passive acquisition, and is obtained by actively reporting a monitored object; the system also supports active acquisition of monitoring information, maintenance personnel access the control system and the interface 307 of the main control board 3 through the grid server 10 and issue monitoring instructions of specific active service boards or specific channels on the specific active service boards, and the first microprocessor MPU304 and the control system 307 process the instructions and transmit the instructions to the corresponding active service boards 5 through the equipment backplane interface 308.
At that time, the second microprocessor MPU505 in the active service board 5 transmits the instruction to the second MEMS optical switch 502, and the second MEMS optical switch 502 switches to the channel to be monitored according to the received instruction, so as to connect the monitoring channels, and then the monitoring information is transmitted to the network management server 10 in the foregoing manner.
Each branch monitoring information of the semi-active WMD network supports reporting in a mode of traversing and connecting each access channel through the optical switch 502, and also supports switching to a specified channel for active collection and reporting after receiving an instruction; due to the fact that each trunk monitoring information has independent PD, real-time reporting and collection are supported
When the device normally works, the electric storage module 506 on the active service board 5 is charged constantly to keep a full-power state, when the device is disconnected from the network and cannot be remotely programmed or/and when the device is disconnected from the network and cannot realize the work of active devices such as the second MEMS optical switch 502 and the like, the electric storage module 506 starts to work to supply power to the corresponding active service board, and at this time, because the device is disconnected from the network and/or is disconnected from the network, the work of the main control board 3 of the device and the communication with the active service board 5 are abnormal, and the remote output of all monitoring and monitoring information cannot be normally realized; the power storage module mainly ensures the switching function of the main circuit COM and the standby circuit PRO links corresponding to the active service board card;
when the main device is disconnected or/and powered off and the electric power of the electric power storage module 506 is exhausted, the communication service of the active service board 5 is not affected, at this time, the network main link is a channel before the electric power storage module 506 stops working, at this time, all active devices stop working, the wave combining and splitting functions of the active service board 5 are not affected, the service is continuous, at this time, functions such as switching and monitoring and the like which need the active devices to work cannot be realized
It should be understood that the monitoring information of the embodiments of the present invention includes, but is not limited to, optical module vendor information (including, but not limited to, vendor name, vendor PN, vendor SN, vendor version number), optical module performance information (including, but not limited to, input optical power, output optical power, temperature, bias current, voltage, and rate).
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (9)
1. An OPEN-WDM device is characterized in that one end of the device is connected with a main path composite wave optical signal at a far end through an optical fiber, and the other end of the device is connected with an optical module at a local end; the equipment comprises a main machine frame (1), a power supply board (2) and a main control board (3) which are arranged in the equipment, wherein a plurality of service clamping grooves are formed in the main machine frame (1), a plurality of active service boards (5) and a plurality of customized panels (7) are arranged in the service clamping grooves, and passive multiplexer/demultiplexer devices (6) are arranged in the customized panels (7); a heat dissipation plate (4) is arranged on the side surface of the main machine frame (1); the input end of the power supply board (2) is connected with an external power supply, and the output end of the power supply board is connected with the main control board (3) and the active service board (5); the active service board (5) and the passive multiplexer/demultiplexer (6) are both connected with the main control board (3); the remote composite wave optical signal is accessed to a passive composite wave splitter (6) through a main control board (3), a branch optical signal after passing through the passive composite wave splitter (6) is connected with an optical module and carries out signal return, and a branch optical signal separated from the branch optical signal is accessed to the main control board (3) for monitoring; the far-end wave-combining optical signal is accessed to an active service board (5), a branch optical signal after passing through the active service board (5) is connected with an optical module and carries out signal return, and a branch optical signal separated from the branch optical signal is monitored through the active service board (5);
the customized panel (7) is provided with an inner frame (701), an outer frame (702) and mounting bolts (703); the inner frame (701) is arranged in the outer frame (702), and the passive multiplexer-demultiplexer (6) is installed through the inner frame (701); the mounting bolts (703) are arranged on the outer frame (702), the outer frame (702) can be detached, and after the outer frame (702) is detached, the active service board (5) is mounted in the service card slot.
2. An OPEN-WDM arrangement according to claim 1, characterized in that said active service boards (5) are provided with fiber bundles (8), the active service boards (5) implementing the fiber bundle egress mode via the fiber bundles (8).
3. An OPEN-WDM apparatus according to claim 1, characterized in that the fiber egress on the passive combiner-splitter (6) comprises the following two:
the passive combiner-splitter (6) is provided with an optical fiber bundle (8), and the passive combiner-splitter (6) realizes the fiber output mode of the bundle fiber through the optical fiber bundle (8);
the passive combiner-splitter (6) is provided with a plurality of LC flange interfaces (9), and the passive combiner-splitter (6) outputs fibers through the LC flange interfaces (9).
4. An OPEN-WDM device according to claim 1, characterized in that the device further comprises a network management server (10), the main control board (3) being connected to the network management server (10).
5. An OPEN-WDM device according to claim 4, characterized in that said main control board (3) comprises a plurality of COM interfaces (301), a plurality of optical splitters (302), a first MEMS optical switch (303), a first microprocessor MPU (304), a first APD (305), a first TIA (306), a management and control system and interface (307); the equipment is also internally provided with an equipment serial port (11); wherein:
the passive combiner-splitter (6) is connected with a group of COM interfaces (301) and optical splitters (302) on the main control board (3), a remote passive WDM network is connected with another group of COM interfaces (301) and optical splitters (302) on the main control board (3), and the two optical splitters (302) are connected with each other to form a passive WDM signal channel; a branch optical signal is respectively branched from the two optical splitters (302) and is connected to a first MEMS optical switch (303), one end of the first MEMS optical switch (303) is connected with a first microprocessor MPU (304) through a first APD (305) and a first TIA (306), and the other end of the first MEMS optical switch is directly connected with the first microprocessor MPU (304); one end of the first microprocessor MPU (304) is connected with the network management server (10) through a management and control system and an interface (307), and the other end is connected with the equipment serial port (11).
6. An OPEN-WDM arrangement according to claim 1, characterized in that said active service board (5) comprises a semi-active WDM module (501), a second MEMS optical switch (502), a second APD (503), a second TIA (504), a second microprocessor MPU (505), an electric storage module (506); the equipment is also internally provided with an equipment serial port (11); wherein:
the wave-combining optical signal of the far end is divided by a semi-active WDM module (501), and the wave-combining output is carried out on the divided wave optical signal sent out by the local end by the semi-active WDM module (501); the optical splitting signal of each branch optical signal output by the semi-active WDM module (501) is connected with a second MEMS optical switch (502), and one end of the second MEMS optical switch (502) is connected with a second microprocessor MPU (505) through a second APD (503) and a second TIA (504); branch optical signals separated from trunk wave combining optical signals on the semi-active WDM module (501) are connected to a second microprocessor MPU (505) for monitoring, and each branch optical signal on the second MEMS optical switch (502) is connected to the second microprocessor MPU (505) for monitoring; the second microprocessor MPU (505) is connected to the electric storage module (506), and both the second microprocessor MPU (505) and the electric storage module (506) are connected to the device serial port (11).
7. An OPEN-WDM arrangement according to claim 6, characterized in that said semi-active WDM module (501) is provided with a main COM interface and a standby PRO interface, a multi-stage filter, each stage of filter is connected to the fiber outlet through an optical splitter; wherein:
the remote composite wave optical signal is input through a main path and a standby path of a semi-active WDM module (501), and the main path and the standby path respectively output a PD monitoring signal through an optical splitter; the combined wave optical signal passes through the filter plates with all wavelengths step by step, and each wavelength only passes through the filter plate with the corresponding wavelength in a transmission way, otherwise, the combined wave optical signal is reflected to a filter channel of the next stage; the combined wave optical signal is decomposed into multiple branch optical signals with independent wavelengths, and a branch optical signal is separated from each branch through an optical splitter for monitoring; and the branch optical signals sent by the local side are converged and combined after passing through the corresponding filter plate and then output to the remote side, and each branch of the local side is also divided into a branch optical signal by the optical splitter for monitoring.
8. An OPEN-WDM equipment according to claim 1, characterized in that the split optical signals used for monitoring on the active service board (5) and the master control board (3) each use 3% -5% split, preferably 3%.
9. A control method using the OPEN-WDM equipment according to any one of claims 1-8, characterized in that the method comprises the steps of:
the far-end wave-combining optical signal is input to an active service board or a passive wave-combining and splitting device for wave-splitting processing and is transmitted to a local side; the wave splitting optical signal of the local side is input to an active service board or a passive wave combining and splitting device for wave combining processing and is transmitted to a far end; through the combination of the active service board and the passive multiplexer/demultiplexer on the equipment, three working modes are realized: a power supply mode, a battery supply mode and a power off mode;
in a power supply mode:
the active service board and the main control board are powered through the power supply board;
the optical signal of the active service board is monitored by a microprocessor on the active service board, and the method comprises the following steps: monitoring a main path of the far-end wave-combined optical signal, monitoring a standby path of the far-end wave-combined optical signal and monitoring optical signals of all branch paths;
the microprocessor through the main control board monitors the optical signal of the passive multiplexer/demultiplexer, including: monitoring a main path of the optical signal combined with the far end and monitoring a main path of the optical signal combined with the local end;
protection switching is carried out on the active service board through a microprocessor on the active service board, and if the main path optical signal is abnormal, the standby path optical signal is switched;
in a battery-powered mode:
the power storage module supplies power to the active service board;
the communication services of the active service board, the passive multiplexer/demultiplexer and the far end are not influenced;
the communication functions of the active service board, the passive multiplexer/demultiplexer and the main control board are all interrupted, and the power storage module of the active service board is used for ensuring the normal operation of the protection switching function of the main path optical signal and the standby path optical signal of the active service board;
in a power-down mode:
the electric quantity of the electric storage module is exhausted;
the active service board, the passive multiplexer/demultiplexer and the far-end communication service are not affected, and at the moment, the network main link is a channel before the power storage module stops working;
the monitoring functions of the active service board and the passive multiplexer/demultiplexer are interrupted, and the protection switching function of the active service board is also interrupted.
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