CN210183339U - Semi-active WDM system - Google Patents
Semi-active WDM system Download PDFInfo
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- CN210183339U CN210183339U CN201921238647.2U CN201921238647U CN210183339U CN 210183339 U CN210183339 U CN 210183339U CN 201921238647 U CN201921238647 U CN 201921238647U CN 210183339 U CN210183339 U CN 210183339U
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Abstract
The utility model discloses a semi-active WDM wavelength division system belongs to the communication field, the utility model has the advantages of the passive characteristic that has kept distal end wavelength division multiplexing equipment only has realized the two-way light protect function of single fiber through increasing active protection shield in the office. The embodiment of the utility model provides a passive system cost advantage has been obtained and the circuit problem of the line protection of photosphere has been solved again to the advantage of need not to supply power can the field installation. By accessing network management, it can support various graphic interface management such as SNMP, Web, etc., and provide the function of carrier network management and protection. The embodiment of the utility model provides a local side distal end low-latency low-cost communication in 5g fronthaul network has been realized at pure physical layer.
Description
Technical Field
The utility model relates to the field of communication technology, especially, relate to a semi-active WDM wavelength division system.
Background
In an existing WDM (Wavelength Division Multiplexing) system, in order to cope with the risk of insecurity of an optical fiber line (for example, the situation of optical cable breakage, etc.), a working line is automatically switched to a Protection line by an OLP (optical line Protection) function, so as to ensure that a service is not interrupted. Currently, OLP protection is mainly divided into two types: 1+1OLP protection switching mode and 1: 1OLP protection switching mode.
The OLP protection switching mode of 1+1 mainly adopts a dual-transmission selective-reception protection mode, 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 splitting ratio (50:50), and is transmitted to the opposite end along the main and standby optical fibers at the same time, the receiving end detects two paths of optical power of R1 and R2, and selects a working path communicated with Rx according to the power condition and the set switching condition.
The OLP protection switching mode of 1:1 mainly adopts a selective transmission and selective reception protection mode, as shown in fig. 2, in the protection mode, working service signals are all transmitted along a working optical fiber, and a non-working optical fiber can transmit other secondary service signals. And the OLP equipment at the two ends synchronously selects to work on the primary optical fiber or switch to the standby optical fiber according to the conditions of the primary optical fiber and the standby optical fiber.
However, whatever the above-mentioned OLP protection switching method, it is necessary to require that the WDM equipment at both ends must be operated live, i.e. active WDM equipment.
In a 5G fronthaul network, because a 5G active antenna AAU is often installed in a field environment, if an OLP protection function is to be implemented, a power supply needs to be provided for WDM remote equipment in the field, the power supply construction difficulty of the outdoor antenna remote is high, the power consumption is high, and a large amount of electricity charges generated by deployment are a huge expense for the density of a 5G base station, and the cost is too high in the scheme of the existing active WDM wavelength division system, and the large-area application is almost impossible.
However, there is a pure passive WDM wavelength division system at present, but it cannot realize the OLP protection function and the network management function; signals in the existing active OTN system are stored in a board card, so that the delay is high, and the requirement that 5G requirement on low delay is not met.
Therefore, an innovation is urgently needed in the current 5G fronthaul, which can reduce the cost and meet the protection and management required by an operation and maintenance network.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem, an embodiment of the present invention provides a semi-active WDM wavelength division system, including 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 wave-splitting device; the OLP board card is connected with a first wave-combining wave-splitting device, the first wave-combining wave-splitting device is connected with a wave-splitting module, the wave-splitting 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 an optical splitter and a second wave-combining wave-splitting device; the second optical module is connected with the second wave-combining wave-splitting filter, and the optical splitter is connected with the second wave-combining wave-splitting filter;
the OLP board card is connected with the optical splitter through a main path optical fiber and a standby path optical fiber, the OLP board card is provided with an optical switch, the optical switch is connected with the optical splitter through the main path optical fiber or the standby path optical fiber, and the light splitting proportion of the optical splitter is 50%: 50 percent.
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 light module is connected with an I2C expansion bus chip.
Preferably, the wavelength division module is connected with an I2C expansion bus chip.
The embodiment of the utility model provides a semi-active WDM wavelength division system's advantage lies in having kept the passive characteristic of far-end wavelength division multiplexing equipment, only has realized the two-way light protect function of single fiber through increasing active protection board at the local side. The embodiment of the utility model provides a passive system cost advantage has been obtained and the circuit problem of the line protection of photosphere has been solved again to the advantage of need not to supply power can the field installation. Wavelength conversion is carried out through the wavelength division module, and wavelength full utilization is achieved. By accessing network management, it can support various graphic interface management such as SNMP, Web, etc., and provide the function of carrier network management and protection. The embodiment of the utility model provides a local side distal end low-latency low-cost communication in 5g fronthaul network has been realized at pure physical layer.
Drawings
Fig. 1 is a schematic diagram of a 1+1OLP protection switching manner of an existing active WDM system;
fig. 2 is a 1:1 schematic diagram of the protection switching mode of the OLP;
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 a structure when the first board is an active board.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present 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 the 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 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 devices related to the embodiments of the present invention will be briefly described below.
The 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 process of data from the far end to the central office end, the second optical module converts an electrical signal to be transmitted into an optical signal, and the first optical module converts a received optical signal into an electrical signal.
The wave-combining wave-splitting device can realize wave-combining and wave-splitting, and uses a wave-division multiplexing technology. Wavelength Division multiplexing (wdm) (wavelength Division multiplexing) is a technology in which optical carrier signals (carrying various information) with two or more different wavelengths are combined together (multiplexed) at a transmitting end by a Multiplexer (also called a combiner, Multiplexer), and are coupled 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 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 to 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 upstream optical interfaces are distributed to all downstream optical interfaces for transmission, and the optical signals from the downstream optical interfaces are distributed to only one upstream optical interface for transmission.
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 wave-splitting device; the OLP board card is connected with a first wave-combining wave-splitting device, the first wave-combining wave-splitting device is connected with a wave-splitting module, the wave-splitting 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 also 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 an optical splitter and a second wave-combining wave-splitting device; the second optical module is connected with the second wave-combining wave-splitting filter, and the optical splitter is connected with the second wave-combining wave-splitting filter;
the OLP board card is connected with the optical splitter through a main path optical fiber and a standby path optical fiber, the OLP board card is provided with an optical switch, the optical switch is connected with the optical splitter through the main path optical fiber or the standby path optical fiber, and the light splitting proportion of the optical splitter is 50%: 50 percent.
The background server is a network manager, and all data set to the board card by the network manager are stored in a Flash Memory) after being received, so that power failure is prevented from being lost.
It should be noted that the remote office is a system, and when the remote office does not need to supply power, the office needs to supply power, and the system may be referred to as a semi-active or semi-passive system.
The optical module of the utility model can be 0231A10-1610SFP optical module, 0231A10-1590 optical module, 0231A10-1550, SFP-GE-LH20-SM1530 any one of etc.
The optical splitter can be any one of FBT-SM-ST-S1X2, FBT-SM-ST-S1X2, FBT-SM-BF-T1xN and the like.
The wave-combining wave-splitting device can be a coarse wave-splitting multiplexer or a dense wave-splitting multiplexer.
The wavelength division module, also called wavelength converter or wavelength conversion module, is used for wavelength conversion, and the wavelength division module may be any one of 115515 and 176, 135036-92, etc.
The embodiment of the utility model provides an OLP integrated circuit board, also known as OLP light protection shield is a protection system for the optical fiber circuit is backup, the light path automatic switch-over module of its adoption is one kind and is applied to the optical device that the optical fiber communication field is main, be equipped with the light path and switch over, can automatic identification main, be equipped with system's light path signal state, carry out the instantaneous switch-over of light path to when can ensure that main optical cable takes place the total obstacle, protection system operates normally. The OLP light protection board is widely used for main/standby protection of various main lines and various optical path switching networks. Its advantages are direct conversion and utilization of optical signals in optical line, small size, and high safety and economy.
The optical protection board card can be any one 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 end is as follows:
optical modules with different wavelengths in the far-end equipment send optical signals with different wavelengths, and the optical signals with different wavelengths enter the wave combining and splitting device of the second board card for wave combining so as to transmit the optical signals to the optical splitter by using the same optical fiber. The light splitting ratio of the light splitter is 50%: 50%, i.e. the optical signal is split in two. The optical signal divided into two is transmitted through the main path optical fiber and the standby path optical fiber respectively, namely the main path and the standby path both have remote data information.
The central office device receives data information transmitted by the main path optical fiber and data information transmitted by the backup path optical fiber through an RX1 port and an RX2 port (RX1 and RX2 ports are data receiving ports) of the OLP board card, respectively. Since the data of the main path and the standby path are the same, only one path is needed to be received. The optical switch is connected with the RX1 port in a default state, that is, receives data information transmitted by the main path optical fiber. The OLP board transmits an optical signal at an RX1 port to the first board, and the board decomposes the optical signal into 6 paths of light with different wavelengths through the multiplexer/demultiplexer, performs wavelength conversion through the wavelength division module, and transmits the converted light to the first optical module. The system realizes the open transparent transmission of optical signals with no amplification, low cost and high integration.
In a specific embodiment, when the optical path automatic switching module of the OLP board recognizes that the optical power data received by the OLP board is smaller than the switching threshold value issued by the network manager, the optical path is instantaneously switched, and the switched path information is uploaded to the network manager; and 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, reporting important alarm information to a network manager.
The embodiment of the utility model provides a semi-active WDM wavelength division system adopts WDM wavelength division system to save the fiber resource; the system is suitable for wavelengths defined by all ITU (International telecommunication Union) standards of CWDM (sparse wavelength division multiplexing) and DWDM (dense wavelength division multiplexing), and the optical module is suitable for a color light optical module; the system supports internet network management, mobile phone APP operation and GIS map display, so that an operator can monitor the system. The system supports 25G eCPRI high-speed signal transmission. The system stores all the data set to the board card by the network manager into the flash, so that the system has the characteristic that service transmission is not influenced after the equipment is powered off.
The embodiment of the utility model provides a semi-active WDM wavelength division system's advantage lies in having kept the passive characteristic of far-end wavelength division multiplexing equipment, only has realized the two-way light protect function of single fiber through increasing active protection board at the local side. The embodiment of the utility model provides a passive system cost advantage has been obtained and the circuit problem of the line protection of photosphere has been solved again to the advantage of need not to supply power can the field installation. Wavelength conversion is carried out through the wavelength division module, and wavelength full utilization is achieved. By accessing network management, it can support various graphic interface management such as SNMP, Web, etc., and provide the function of carrier network management and protection. The embodiment of the utility model provides a local side distal end low-latency low-cost communication in 5g fronthaul network has been realized at 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 expansion chip and an MCU, the I2C bus expansion chip is connected to the MCU, and the MCU establishes a communication connection with a network manager.
The I2C bus expansion chip is connected to the first optical module and the wavelength division module, and the MCU (which may be understood as a single chip microcomputer) monitors DDM information of the wavelength division module and the first optical module via the I2C bus, where the DDM information refers to received optical power data, transmitted optical power data, and the like.
Through monitoring the transmitting and receiving optical power of each channel, the fault location and maintenance are easier.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.
Claims (5)
1. A semi-active WDM system is characterized in that it includes 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 wave-splitting device; the OLP board card is connected with a first wave-combining wave-splitting device, the first wave-combining wave-splitting device is connected with a wave-splitting module, the wave-splitting 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 an optical splitter and a second wave-combining wave-splitting device; the second optical module is connected with the second wave-combining wave-splitting filter, and the optical splitter is connected with the second wave-combining wave-splitting filter;
the OLP board card is connected with the optical splitter through a main path optical fiber and a standby path optical fiber, the OLP board card is provided with an optical switch, the optical switch is connected with the optical splitter through the main path optical fiber or the standby path optical fiber, and the light splitting proportion of the optical splitter is 50%: 50 percent.
2. A semi-active WDM wavelength division system according to claim 1, wherein the 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 comprises: 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 according to claim 1, wherein said first optical module is connected with 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.
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| CN201921238647.2U CN210183339U (en) | 2019-07-31 | 2019-07-31 | Semi-active WDM system |
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| CN201921238647.2U CN210183339U (en) | 2019-07-31 | 2019-07-31 | Semi-active WDM system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380810A (en) * | 2019-07-31 | 2019-10-25 | 广州芯泰通信技术有限公司 | A kind of semi-active WDM wavelength-division system |
| CN112953641A (en) * | 2021-02-09 | 2021-06-11 | 长飞光纤光缆股份有限公司 | OPEN-WDM device and control method |
| CN115276783A (en) * | 2022-07-04 | 2022-11-01 | 长芯盛（武汉）科技有限公司 | Front-transmission optical module WDM device and network management method thereof |
-
2019
- 2019-07-31 CN CN201921238647.2U patent/CN210183339U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380810A (en) * | 2019-07-31 | 2019-10-25 | 广州芯泰通信技术有限公司 | A kind of semi-active WDM wavelength-division system |
| CN110380810B (en) * | 2019-07-31 | 2024-03-22 | 广州芯泰通信技术有限公司 | Semi-active WDM wave division system |
| CN112953641A (en) * | 2021-02-09 | 2021-06-11 | 长飞光纤光缆股份有限公司 | OPEN-WDM device and control method |
| CN115276783A (en) * | 2022-07-04 | 2022-11-01 | 长芯盛（武汉）科技有限公司 | Front-transmission optical module WDM device and network management method thereof |
| CN115276783B (en) * | 2022-07-04 | 2024-05-03 | 长芯盛（武汉）科技有限公司 | Forward optical module WDM equipment and network management method thereof |
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