CN110380810B - Semi-active WDM wave division system - Google Patents
Semi-active WDM wave division system Download PDFInfo
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- CN110380810B CN110380810B CN201910709751.3A CN201910709751A CN110380810B CN 110380810 B CN110380810 B CN 110380810B CN 201910709751 A CN201910709751 A CN 201910709751A CN 110380810 B CN110380810 B CN 110380810B
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- 230000003287 optical effect Effects 0.000 claims abstract description 104
- 238000004891 communication Methods 0.000 claims abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 5
- 239000013307 optical fiber Substances 0.000 claims description 48
- 230000008901 benefit Effects 0.000 abstract description 9
- 230000002457 bidirectional effect Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 230000006870 function Effects 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
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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
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Abstract
The invention discloses a semi-active WDM wave division system, belonging to the communication field, which has the advantages that the passive characteristic of the far-end wave division multiplexing equipment is maintained, and the single-fiber bidirectional optical protection function is realized only by adding an active protection board at the local side. The embodiment of the invention solves the circuit problem of circuit protection of the optical layer while obtaining the cost advantage of the passive system and the field installation advantage without power supply. Through the access network management, can support multiple graphic interface management such as SNMP, web, etc., offer the management of the carrier-class network and protect the function. The embodiment of the invention realizes the local-side remote low-delay low-cost communication in the 5g forward network in the pure physical layer.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a semi-active WDM (wavelength division multiplexing) system.
Background
In the existing WDM (Wavelength Division Multiplexing: wavelength division multiplexing) system, in order to cope with the unsafe risk of an optical fiber line (such as the situation of breaking an optical cable, etc.), a self-healing protection capability is realized, and generally, an OLP (Optical Line Protection: optical line protection) function is used to automatically switch a working line to a protection line so as to ensure that the service is not interrupted. OLP protection is currently largely divided into two types: 1+1olp protection switching scheme and 1:1OLP protection switching scheme.
The OLP protection switching mode of 1+1 mainly adopts a protection mode of dual transmission and reception, as shown in fig. 1, the transmission optical power of the Tx port is distributed to the T1 and T2 ports according to a certain beam splitting ratio (50:50), and is simultaneously transmitted to the opposite ends along the main and standby optical fibers, the receiving end detects the two paths of optical power of R1 and R2, and a working path communicated with Rx is selected according to the power condition and the set switching condition.
The 1:1OLP protection switching mode mainly adopts a protection mode of selective transmission and selective reception, as shown in fig. 2, under the protection mode, working service signals are all transmitted along working optical fibers, and non-working optical fibers can transmit other secondary service signals. The OLP equipment at two ends synchronously selects to work on the main optical fiber or switch to the standby optical fiber according to the conditions of the main optical fiber and the standby optical fiber.
But whichever of the OLP protection switching approaches referred to above must require that the WDM equipment at both ends must be powered to operate, i.e. active WDM equipment.
In the 5G front-end transmission network, because the active antenna AAU of the 5G is often installed in a field environment, if the OLP protection function is to be realized, power is required to be provided for WDM remote equipment in the field, the remote power supply of an outdoor antenna has high construction difficulty and high power consumption, aiming at the density of 5G base stations, the electric charge generated by large-scale deployment is a huge expenditure, and the scheme cost of the existing active WDM wavelength division system is too high to be almost applied in a large area.
At present, a pure passive WDM wavelength division system exists, but the OLP protection function cannot be realized, and the network management function cannot be realized; the signals in the current active OTN system are stored in the board card, so that the delay is higher, and the requirement of low delay of 5G requirements is not met.
Therefore, an innovation is needed for the current 5G front-end, which can reduce the cost and meet the protection and management of the operation and maintenance network.
Disclosure of Invention
In order to solve the above technical problems, an embodiment of the present invention provides a semi-active WDM wavelength division system, including a local side device and a remote side device:
the local side equipment comprises a first board card and an OLP board card; the first board card comprises a first optical module, a wavelength division module and a first wave combining and dividing device; the OLP board card is connected with a first wave combining and dividing device, the first wave combining and dividing device is connected with a wave dividing module, the wave dividing module is connected with a first optical module, and the OLP board card is in communication connection with a background server;
the remote equipment comprises a second optical module and a second board card; the second board card comprises a light splitter and a second wave combining and splitting device; the second optical module is connected with the second wave combining and dividing device, and the light dividing device is connected with the second wave combining and dividing device;
the OLP board is connected with the optical splitter through the main optical fiber and the standby optical fiber, the OLP board is provided with an optical switch, the optical switch is connected with the optical splitter through the main optical fiber or the standby optical fiber, and the light splitting proportion of the optical splitter is 50%:50%.
Preferably, the first board card is an active board card or a passive board card.
Preferably, if the first board card is an active board card, the first board card further includes: the system comprises an I2C bus expansion chip and an MCU, wherein the I2C bus expansion chip is connected with the MCU, and the MCU is in communication connection with a background server.
Preferably, the first optical module is connected with an I2C expansion bus chip.
Preferably, the wavelength division module is connected with the I2C expansion bus chip.
Preferably, the optical switch is connected with the beam splitter through a main path optical fiber or a standby path optical fiber; the second board card sends data to the OLP board card through the main optical fiber and the standby optical fiber; and the OLP board card sends data to the second board card through the main path optical fiber or the standby path optical fiber.
The semi-active WDM wavelength division system provided by the embodiment of the invention has the advantages that the passive characteristic of the far-end wavelength division multiplexing equipment is maintained, and the single-fiber bidirectional optical protection function is realized only by adding the active protection board at the local side. The embodiment of the invention solves the circuit problem of circuit protection of the optical layer while obtaining the cost advantage of the passive system and the field installation advantage without power supply. Wavelength conversion is carried out through the wavelength division module, so that full utilization of wavelength is realized. Through the access network management, can support multiple graphic interface management such as SNMP, web, etc., offer the management of the carrier-class network and protect the function. The embodiment of the invention realizes the local-side remote low-delay low-cost communication in the 5g forward network in the pure physical layer.
Drawings
Fig. 1 is a schematic diagram of a 1+1olp protection switching scheme of a prior art active WDM system;
fig. 2 is a diagram of a prior art active WDM system 1:1OLP protection switching mode;
FIG. 3 is a system block diagram of a semi-active WDM wavelength division system provided by an embodiment of the present invention;
fig. 4 is a block diagram of the structure when the first board is an active board.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Some of the devices involved in the embodiments of the present invention are briefly described below.
An optical module (optical module) is composed of an optoelectronic device, a functional circuit, an optical interface and the like, wherein the optoelectronic device comprises a receiving part and a transmitting part and is used for receiving and transmitting data. In the flow of data from the far end to the local end, the second optical module converts an electric signal to be transmitted into an optical signal, and the first optical module converts the received optical signal into an electric signal.
The wave combining and dividing device can realize wave combining and dividing, and uses the wave division multiplexing technology. Wavelength division multiplexing WDM (Wavelength Division Multiplexing) is a technology of combining (multiplexing) two or more optical carrier signals with different wavelengths (carrying various information) at a transmitting end through a Multiplexer (also called a Multiplexer) and coupling the signals to the same optical fiber of an optical line for transmission; at the receiving end, the optical carriers of various wavelengths are separated (demultiplexed) by a Demultiplexer (also called a Demultiplexer) and then further processed by an optical receiver to recover the original signal.
The optical splitter is a passive device, also called an optical splitter, and does not need external energy, but only needs input light. Its function is to distribute downstream data and concentrate upstream data. The optical splitter is provided with an uplink optical interface and a plurality of downlink optical interfaces. The optical signals from the uplink optical interfaces are distributed to all the downlink optical interfaces to be transmitted, and the optical signals from the downlink optical interfaces are distributed to the unique uplink optical interfaces to be transmitted.
Referring to fig. 3, an embodiment of the present invention provides a semi-active WDM wavelength division system, including a local side device and a remote side device:
the local side equipment comprises a first board card and an OLP board card; the first board card comprises a first optical module, a wavelength division module and a first wave combining and dividing device; the OLP board card is connected with a first wave combining and dividing device, the first wave combining and dividing device is connected with a wave dividing module, the wave dividing module is connected with a first optical module, and the OLP board card is in communication connection with a background server; the first board card may be referred to as a service side board card, and the first optical module may be referred to as a service side optical module.
The remote equipment comprises a second optical module and a second board card; the second board card comprises a light splitter and a second wave combining and splitting device; the second optical module is connected with the second wave combining and dividing device, and the light dividing device is connected with the second wave combining and dividing device;
the OLP board is connected with the optical splitter through the main optical fiber and the standby optical fiber, the OLP board is provided with an optical switch, the optical switch is connected with the optical splitter through the main optical fiber or the standby optical fiber, and the light splitting proportion of the optical splitter is 50%:50%.
The background server is a network manager, and all data set to the board card through the network manager are stored in a Flash Memory after being received so as to ensure that power failure is not lost.
It should be noted that, the remote office is a system, and when the remote office does not need to be powered, the office needs to be powered, the system may be referred to as a semi-active system or a semi-passive system.
The optical module of the present invention may be any one of 0231A10-1610SFP optical module, 0231A10-1590 optical module, 0231A10-1550, SFP-GE-LH20-SM1530, etc.
The beam splitter may be any one of FBT-SM-ST-S1X2, FBT-SM-BF-T1xN, etc.
The wave combining and dividing device can be a coarse wave dividing multiplexer or a dense wave dividing multiplexer.
Wavelength division modules, also called wavelength converters or wavelength conversion modules, for wavelength conversion, which may be any of 115515-176, 135036-92, etc.
The OLP board card, also called OLP light protection board, is a protection system for backup of optical fiber lines, and the adopted automatic light path switching module is an optical device applied to main and standby light path switching in the field of optical fiber communication, and can automatically identify the light path signal states of the main and standby systems and perform instantaneous light path switching, so that the protection system can be ensured to operate normally when the main optical cable is subjected to full-resistance. OLP optical protection boards are widely used for active and standby protection of various trunks and various optical path switching networks. The optical signal can be directly converted and utilized in the optical line, and the optical signal is small in size, economical and safe, so that the optical signal is applied to various optical transmission fields.
The light protection board card may be any of 03030ESY, 03030FVN, 03030JAT, 03030JSC, and the like.
For a clearer description of the present invention, the following description will take far-end data to local-end data as an example.
The flow from the far-end data to the local side is as follows:
optical modules with different wavelengths in the remote equipment send optical signals with different wavelengths, and the optical signals with different wavelengths enter a wave combining and dividing device of the second board card to be combined, so that the same optical fiber is used for transmitting the optical signals to the wave dividing device. The light splitting ratio of the light splitter is 50%:50, i.e. divide the optical signal in two. The optical signals divided into two parts are transmitted through the main optical fiber and the standby optical fiber respectively, namely, the main optical fiber and the standby optical fiber have far-end data information.
The local side equipment receives the data information transmitted by the main optical fiber and the data information transmitted by the standby optical fiber respectively through an RX1 port and an RX2 port (the RX1 port and the RX2 port are data receiving ports) of the OLP board. Since the main path and the standby path are the same, one path is received. The optical switch is connected with the RX1 port in a default state, namely, receives data information transmitted by the main optical fiber. The OLP board transmits the optical signals of the RX1 port to the first board, the board decomposes the optical signals into 6 paths of light with different wavelengths through the multiplexer/demultiplexer, and then the light is converted through the wavelength division module and transmitted to the first optical module. The system realizes the amplification-free, low-cost, highly integrated, open and transparent transmission of optical signals.
It can be understood that, in the far-end data to the local end, the second board card sends data to the OLP board card through the main optical fiber and the standby optical fiber; and in the process of transmitting the local data to the far end, the OLP board card transmits the data to the second board card through a main path optical fiber or a standby path optical fiber.
In a specific embodiment, when the optical path automatic switching module of the OLP board card recognizes that the optical power data received by the OLP board card is smaller than a switching threshold value issued by a network manager, the optical path is switched instantaneously, and the switched path information is uploaded to the network manager; if the optical power data identified by the optical path automatic switching module of the OLP board card is lower than the alarm threshold but higher than the switching threshold, important alarm information is reported to the network manager.
The semi-active WDM wavelength division system provided by the embodiment of the invention saves optical fiber resources by adopting the WDM wavelength division system; the system is suitable for CWDM (sparse wavelength division multiplexing) and DWDM (dense wavelength division multiplexing) all the wavelengths defined by the ITU (International Telecommunication Union ) standards, and the optical module is suitable for a color optical module; the system supports Internet network management, mobile phone APP operation and GIS map display, so that operators can monitor the system. The system supports 25G eCPRI high-speed signaling. The system stores all the data set to the board card through the network management into the flash, so that the system has the characteristic of not affecting service transmission after the equipment is powered off.
The semi-active WDM wavelength division system provided by the embodiment of the invention has the advantages that the passive characteristic of the far-end wavelength division multiplexing equipment is maintained, and the single-fiber bidirectional optical protection function is realized only by adding the active protection board at the local side. The embodiment of the invention solves the circuit problem of circuit protection of the optical layer while obtaining the cost advantage of the passive system and the field installation advantage without power supply. Wavelength conversion is carried out through the wavelength division module, so that full utilization of wavelength is realized. Through the access network management, can support multiple graphic interface management such as SNMP, web, etc., offer the management of the carrier-class network and protect the function. The embodiment of the invention realizes the local-side remote low-delay low-cost communication in the 5g forward network in the pure physical layer.
Referring to fig. 4, in a preferred embodiment, if the first board card is an active board card, the first board card may further include an I2C bus extension chip and an MCU, where the I2C bus extension chip is connected to the MCU, and the MCU establishes communication connection with the network manager.
The I2C bus expansion chip is respectively connected with the first optical module and the wavelength division module, the MCU (can be understood as a singlechip) monitors DDM information of the wavelength division module and the first optical module through the I2C bus, and the DDM information refers to received optical power data, transmitted optical power data and the like.
By monitoring the light receiving and transmitting power of each channel, fault positioning and maintenance are easier.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (6)
1. The semi-active WDM wavelength division system is characterized by comprising local side equipment and far-end equipment;
the local side equipment comprises a first board card and an OLP board card; the first board card comprises a first optical module, a wavelength division module and a first wave combining and dividing device; the OLP board card is connected with a first wave combining and dividing device, the first wave combining and dividing device is connected with a wave dividing module, the wave dividing module is connected with a first optical module, and the OLP board card is in communication connection with a background server; the local side equipment receives data information transmitted by the main optical fiber and data information transmitted by the standby optical fiber through an RX1 port and an RX2 port of the OLP board card respectively;
the remote equipment comprises a second optical module and a second board card; the second board card comprises a light splitter and a second wave combining and splitting device; the second optical module is connected with the second wave combining and dividing device, and the light dividing device is connected with the second wave combining and dividing device;
the OLP board is connected with the optical splitter through the main optical fiber and the standby optical fiber, the OLP board is provided with an optical switch, the optical switch is connected with the optical splitter through the main optical fiber or the standby optical fiber, and the light splitting proportion of the optical splitter is 50%:50%; when the optical path automatic switching module of the OLP board card recognizes that the optical power data received by the OLP board card is smaller than the switching threshold value issued by the network manager, the optical path is switched instantaneously, and the switched path information is uploaded to the network manager.
2. A semi-active WDM wavelength division system in accordance with claim 1, wherein said first board is an active board or a passive board.
3. A semi-active WDM wavelength division system according to claim 1,
if the first board card is an active board card, the first board card further includes: the system comprises an I2C bus expansion chip and an MCU, wherein the I2C bus expansion chip is connected with the MCU, and the MCU is in communication connection with a background server.
4. A semi-active WDM wavelength division system in accordance with claim 1, wherein said first optical module is connected to an I2C expansion bus chip.
5. A semi-active WDM wavelength division system according to claim 1, wherein said wavelength division module is connected to an I2C expansion bus chip.
6. A semi-active WDM wavelength division system according to claim 1, wherein the optical switch is connected to the optical splitter by a main fiber or a standby fiber; the second board card sends data to the OLP board card through the main optical fiber and the standby optical fiber; and the OLP board card sends data to the second board card through the main path optical fiber or the standby path optical fiber.
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| CN201910709751.3A CN110380810B (en) | 2019-07-31 | 2019-07-31 | Semi-active WDM wave division system |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111082890B (en) * | 2019-11-11 | 2021-07-27 | 国家电网有限公司 | OLP channel protection switching method based on OTN redundant wave |
| CN113132049B (en) * | 2019-12-31 | 2023-02-03 | 上海欣诺通信技术股份有限公司 | Semi-active management system of 5G fronthaul networking |
| CN113541795B (en) * | 2020-04-17 | 2022-04-15 | 烽火通信科技股份有限公司 | Single-fiber bidirectional implementation method and equipment for OSC channel of wavelength division system |
| CN111614430A (en) * | 2020-05-13 | 2020-09-01 | 深圳纤亿通科技有限公司 | Active wavelength division equipment with online solution function |
| CN112135208A (en) * | 2020-09-01 | 2020-12-25 | 广州汇信特通信技术股份有限公司 | Novel system applied to 5G forward-transmission semi-active demodulation top |
| CN112953641B (en) * | 2021-02-09 | 2022-03-18 | 长飞光纤光缆股份有限公司 | OPEN-WDM device and control method |
| CN115021805B (en) * | 2022-05-30 | 2024-02-09 | 成都涿光科技有限公司 | Information sampling analysis method, optical splitter, fiber melting disc, local side sampling equipment and platform |
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| KR20050062322A (en) * | 2003-12-18 | 2005-06-23 | 한국전자통신연구원 | Apparatus and method for link protection in wdm-pon |
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