CN111901039A - Semi-active base station forward transmission system with line protection and based on miniature wavelength division - Google Patents
Semi-active base station forward transmission system with line protection and based on miniature wavelength division Download PDFInfo
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- 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 a line protection-based semi-active base station forwarding system based on miniature wavelength division, which comprises a local side service device DU pool, a local side active device with network management monitoring, a far-end passive device and a far-end service device AAU which are connected in sequence; the active equipment with network management monitoring at the office end comprises a first OMPU card, an NMU network management card, a 1U case and three first color light modules with different wavelengths; the remote passive device comprises a second OMPU card and three second color light modules with different wavelengths. The invention keeps the passive characteristic of the original wavelength division equipment, highly integrates the novel miniature CCWDM module and the optical line protection device in the same board card, and increases the transmission distance of the local end and the far end of the base station by the tiny passive insertion loss and equipment space, thereby being capable of quickly opening the station.
Description
Technical Field
The invention relates to a semi-active base station forward transmission system with line protection and based on miniature wavelength division, belonging to the technical field of optical communication.
Background
With the fire development of the 5G communication technology, new base stations or capacity expansion is in large-scale deployment. The deep coverage of the base station requires that the deployed position of the base station is closer to a user, and the base station forward transmission between a local side service device DU (distribution Unit) pool and a remote side service device AAU (Active Antenna Unit) usually adopts a traditional forward transmission scheme of optical fiber direct drive, so that a series of problems such as pipeline resource shortage, high cable cost, long construction period, difficult capacity expansion, large difficulty in on-line operation and maintenance monitoring, easy disconnection of an optical fiber line and the like exist.
Aiming at the problem of base station forward transmission, in the existing solution, besides the traditional base station forward transmission scheme directly driven by optical fibers, in order to solve the problem of optical fiber resource shortage, a passive wavelength division multiplexing solution and an active wavelength division multiplexing solution are provided by using a wavelength division multiplexing technology. The former scheme is composed of pure passive wavelength division multiplexing equipment and wavelength division optical modules, which causes difficult line maintenance, incapability of monitoring the optical power value of the line and incapability of realizing optical fiber line protection. The latter scheme is composed of active wavelength division equipment, a wavelength division optical module and a white light module, and has the advantages of being capable of network management monitoring and optical fiber line protection, but compared with the former, the method increases project cost to a certain extent, needs to occupy more cabinet space, and has the problem of insufficient power supply for some remote base stations. Both schemes adopt common wavelength division equipment with overhigh passive insertion loss, and both have certain limitations.
At present, a base station forward-transmission networking has a high requirement on stability of transmission data, partial sites of a local side and a far end are far away, optical power information of each site and a dual-route protection mechanism need to be monitored remotely in real time, and when a main route of a line is interrupted, a system can automatically jump to a standby route, so that stable transmission of the line is guaranteed. Most of the far-end service equipment AAU needs to be installed in a field environment, active wavelength division equipment can only be used in a constant-temperature and voltage-stable environment, and under the condition that the equipment emits light to a certain extent, the light receiving performance of the equipment is weakened due to the influence of passive insertion loss, and long-distance transmission cannot be achieved. Therefore, there are certain risks and problems with both schemes for base station fronthaul.
Disclosure of Invention
The object of the present invention is to solve the above mentioned technical problems.
In order to achieve the above object, the present invention provides a line protection based on a micro wavelength division semi-active base station forwarding system, which comprises a local side service device DU pool, a local side active device with network management monitoring, a remote passive device and a remote service device AAU, which are connected in sequence; the active device with Network Management monitoring at the office end comprises a first OMPU (Optical fiber multi-multiplexer And Protection Integration Unit) card, an NMU (Network Management Unit) Network card, a 1U chassis And three first color light modules with different wavelengths; the remote passive device comprises a second OMPU card and three second color light modules with different wavelengths.
Further, the first OMPU card includes a first miniature demultiplexing mixer, a 1 × 2 optical switch, a first monitoring probe, a second monitoring probe, a first coupler, and a second coupler; the head end of the first monitoring probe is connected with the first port of the downlink interface of the first coupler; the head end of the second monitoring probe is connected with the first port of the downlink interface of the second coupler; the tail end of the first monitoring probe and the tail end of the second monitoring probe are respectively connected with the NMU network management card; the NMU network management card comprises two electrical ports and two SFPs (Small Form-factor plug, interface devices for converting gigabit electrical signals into optical signals) optical ports, and is used for communicating with a background operation and maintenance server or the cascade among a plurality of active devices with network management monitoring at the office end so as to transmit monitoring data and switch an automatic or manual mode of line protection; the 1U case is an integrated machine frame, the back of the 1U case is provided with an integrated circuit board along the length direction, the integrated circuit board is provided with a multi-pinhole connecting groove along the length direction, and connecting pins of the first OMPU card and the NMU network pipe card are respectively and correspondingly connected into the multi-pinhole connecting groove; the second OMPU card comprises a second miniature synthesis-demodulation wave mixer and a third coupler.
Further, an uplink interface of the 1 × 2 optical switch is connected to an uplink interface of the first miniature add/drop mixer, a first port of a downlink interface is connected to a second port of a downlink interface of the first coupler, and a second port is connected to a second port of a downlink interface of the second coupler; the uplink interface of the first coupler is connected with the first port of the downlink interface of the third coupler through a main path optical fiber; and the uplink interface of the second coupler is connected with the second port of the downlink interface of the third coupler through a standby optical fiber. The uplink interface of the first coupler is also called as a main path port of the first OMPU card, and the uplink interface of the second coupler is also called as a standby path port of the first OMPU card.
Furthermore, the first OMPU card is an active card, and the second OMPU card is a passive OMPU card box.
Further, the first OMPU board further includes a fourth coupler, a fifth coupler, a sixth coupler, a seventh coupler, an eighth coupler, a ninth coupler, a third monitor probe, a fourth monitor probe, a fifth monitor probe, a sixth monitor probe, a seventh monitor probe, and an eighth monitor probe; and the third monitoring probe, the fourth monitoring probe, the fifth monitoring probe, the sixth monitoring probe, the seventh monitoring probe and the eighth monitoring probe are respectively connected with the NMU network management card.
Further, the uplink interfaces of the fourth coupler, the fifth coupler, the sixth coupler, the seventh coupler, the eighth coupler and the ninth coupler are respectively and correspondingly connected with the first, second, third, fourth, fifth and sixth ports of the downlink interface port of the first miniature combined and demultiplexed wave mixer, the first ports of the downlink interfaces of the fourth coupler, the fifth coupler, the sixth coupler, the seventh coupler, the eighth coupler and the ninth coupler are respectively and correspondingly connected with the third monitoring probe, the fourth monitoring probe, the fifth monitoring probe, the sixth monitoring probe, the seventh monitoring probe and the eighth monitoring probe, and the second ports of the downlink interfaces of the fourth coupler, the fifth coupler, the sixth coupler, the seventh coupler, the eighth coupler and the ninth coupler are respectively and correspondingly connected with the optical signal interface of the first color light module.
Further, the electrical interface of the first color light module is connected to the local side service device DU pool, and the electrical interface of the second color light module is connected to the remote side service device AAU.
Further, an uplink interface of the third coupler is connected with an uplink interface of the second miniature synthesis and demodulation wave mixer; the first, second, third, fourth, fifth and sixth ports of the downlink interface of the second miniature combined and demultiplexed wave mixer are respectively connected with three second color light modules with different wavelengths, and the positions of the three first color light modules with different wavelengths are in one-to-one correspondence with the positions of the three second color light modules with different wavelengths.
Compared with the prior art, the invention has the beneficial effects that:
the invention keeps the passive characteristic of the original wavelength Division equipment, highly integrates a novel micro CCWDM (Compact coherent wavelength Division Multiplexer) module and an optical line protection device in the same board card, and increases the transmission distance of the local end and the far end of the base station by micro passive insertion loss and equipment space, so that the quick opening of the base station can be realized. The invention adopts a semi-active transmission system which is composed of active equipment with network management monitoring at a local side and remote passive equipment and has optical line protection, can realize the mixed synchronous transmission of single-fiber bidirectional 3-channel 10G services and 25G services, and the pure physical transparent transmission of data, realizes ultra-low time delay, triggers an alarm based on signal loss for the single-fiber transmitted services, simultaneously transmits the monitoring data to an operation and maintenance center, and supports a main single-fiber and standby single-fiber double-route full-automatic protection mechanism. The invention only needs to arrange active micro wavelength division equipment with low power consumption and line protection at the local side, supports visual software management and control of working states such as SNMP, WEB, mobile phone APP and the like through network management access, and carries out carrier-grade network protection and management. The remote end adopts a passive miniature wavelength division card box which is simple in design and has line protection, and the characteristics of controllability, low time delay and low cost of a 5G fronthaul network are met.
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FIG. 1 is a schematic diagram of one embodiment of the present invention.
Fig. 2 is a schematic diagram of a first OMPU card in an embodiment of the invention.
Fig. 3 is a schematic diagram of a second OMPU card in accordance with an embodiment of the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
As shown in fig. 1, an embodiment of a semi-active base station forwarding system with line protection based on micro wavelength division includes a local side service device DU pool, an active device monitored by a local side with a network manager, a remote passive device, and a remote service device AAU, which are connected in sequence; the active equipment with network management monitoring at the office end comprises a first OMPU card, an NMU network management card, a 1U case and three first color light modules with different wavelengths; the remote passive device comprises a second OMPU card and three second color light modules with different wavelengths.
As shown in fig. 2, the first OMPU card includes a first miniature add-drop multiplexer (CCWDM), a 1 × 2 optical switch, a first monitor probe disposed at a main data path port of the first OMPU card, a second monitor probe disposed at a standby data path port of the first OMPU card, a first coupler, and a second coupler; the first monitoring probe and the second monitoring probe are connected with an NMU network management unit; the NMU network management card comprises 2 electrical ports and 2 SFP optical ports and is used for communicating with a background operation and maintenance server or cascade connection between active devices with network management monitoring at the same local end, and the NMU network management card is used for transmitting monitoring data and adjusting an automatic or manual switching mode of OMPU line protection; 1U machine case is integrated form frame, and its length direction is followed at the back and is equipped with integrated circuit board, integrated circuit board is equipped with many pinhole spread grooves along its length direction, the connection stitch of a OMPU card, NMU network management card corresponds the access respectively in the many pinhole spread grooves.
The uplink interface of the first coupler is connected with the first port of the downlink interface of the third coupler through a main path optical fiber; and the uplink interface of the second coupler is connected with the second port of the downlink interface of the third coupler through a standby optical fiber. The uplink interface of the first coupler is also called as a main path port of the first OMPU card, and the uplink interface of the second coupler is also called as a standby path port of the first OMPU card.
The far-end passive device comprises a second OMPU card and three second color light modules with different wavelengths. As shown in fig. 3, the second OMPU card includes a second miniature demultiplexing mixer (CCWDM) and a third coupler.
A first port of a downlink interface of the 1 × 2 optical switch is connected with a second port of a downlink interface of the first coupler; a second port of the downlink interface of the 1 × 2 optical switch is connected to a second port of the downlink interface of the second coupler; the uplink interface of the first coupler is connected with the first port of the downlink interface of the third coupler through a main path optical fiber; and the uplink interface of the second coupler is connected with the second port of the downlink interface of the third coupler through a standby optical fiber. The uplink interface of the first coupler is also called as a main path port of the first OMPU card, and the uplink interface of the second coupler is also called as a standby path port of the first OMPU card.
The first OMPU board card further comprises a fourth coupler, a fifth coupler, a sixth coupler, a seventh coupler, an eighth coupler, a ninth coupler, a third monitoring probe, a fourth monitoring probe, a fifth monitoring probe, a sixth monitoring probe, a seventh monitoring probe and an eighth monitoring probe; and the third monitoring probe, the fourth monitoring probe, the fifth monitoring probe, the sixth monitoring probe, the seventh monitoring probe and the eighth monitoring probe are respectively connected with the NMU network management card.
The uplink interfaces of the fourth, fifth, sixth, seventh, eighth and ninth couplers are connected with the first, second, third, fourth, fifth and sixth ports of the downlink interface port of the first miniature combined wave-splitting mixer, the first ports of the downlink interfaces of the fourth, fifth, sixth, seventh, eighth and ninth couplers are respectively connected with the third, fourth, fifth, sixth, seventh and eighth monitoring probes, and the second ports of the downlink interfaces of the fourth, fifth, sixth, seventh, eighth and ninth couplers are respectively connected with the optical signal interface of the first color light module.
The background operation and maintenance server is a user network management center, and all data connected with NMU network management are stored in a flash memory after being received, so that the power failure is prevented from being lost.
The electrical interface of the first color light module is connected with the local side service device DU pool, and the electrical interface of the second color light module is connected with the far side service device AAU.
The upstream interface of the third coupler is connected with the second miniature combiner-demultiplexer (CCWDM) upstream interface; and the first, second, third, fourth, fifth and sixth ports of the downlink interface of the second miniature combined and decomposed wave mixer are respectively connected with three second color light modules with different wavelengths.
The three first color light modules with different wavelengths correspond to the three second color light modules with different wavelengths in position one to one.
The invention relates to an embodiment of a semi-active base station forward transmission system with line protection based on miniature wavelength division, which comprises a first OMPU card, a miniature CCWDM module and a hot-pluggable board card, wherein the hot-pluggable board card is highly integrated by the miniature CCWDM module and an optical line protection device, the miniature CCWDM module can realize single-fiber bidirectional three-way wave combination and wave decomposition functions, is a passive device, has the advantages of low passive insertion loss, adopts a wavelength division multiplexing technology, and is provided with an uplink interface for service wave combination and decomposition and six downlink interfaces for service input or output. The optical line protection device is a protection system for backup of a main optical fiber line and a standby optical fiber line, can automatically identify the optical link signal states of the main optical link and the standby optical link, and carries out flash switching (switching time is 20ms) on the main optical link and the standby optical link, so that the main optical cable can be automatically flash switched to the standby optical link when being broken, and the normal operation of a fronthaul system is protected, and the optical line protection device comprises a 1 x 2 optical switch and a circuit control module, wherein the 1 x 2 optical switch is provided with an uplink interface and an uplink direct connection of a micro CCWDM module and 2 downlink interfaces, and the main and standby line interface and opposite end equipment are formed to realize the line protection function through interconnection of the main optical fiber and.
The color light Module (Optical Module) has standard Wavelength, is divided into a Coarse Wavelength Division Multiplexer (CWDM) and a Dense Wavelength Division Multiplexer (DWDM) according to different Wavelength Division standards, and comprises an optoelectronic device, a functional circuit, an Optical interface and the like, wherein the optoelectronic device comprises a receiving part and a transmitting part with single Wavelength, is used for receiving and transmitting data, and is a Module capable of realizing photoelectric conversion. The embodiment of the invention supports all color light modules. In the process of data flow from the far-end service equipment AAU to the local-end service equipment DU pool, the second color light module converts the electric signal to be sent into an optical signal, and the first color light module converts the received optical signal into an electric signal.
The coupler is a three-port passive device and can couple two paths of data input in a downlink into one path of uplink data, and the data from the uplink optical interface can also be coupled and distributed to two paths of downlink outputs.
For a more clear description of the present invention, the following description will take the example of the data from the local side service device DU pool to the remote side service device AAU and the data from the remote side service device AAU to the local side service device DU pool as examples.
The flow from the local side service device DU pool data to the remote side service device AAU is as follows:
the method comprises the steps that a local side service device DU pool sends optical signals with different wavelengths by accessing three first color optical modules with different wavelengths, the optical signals with different wavelengths enter a first port, a second port and a third port of a downlink interface of a first miniature combined and demultiplexed wave mixer of an OMPU card to be combined, and the combined optical signals are transmitted to a far-end passive device through a main path optical fiber or a standby path optical fiber through a data receiving and transmitting port of the first OMPU card; the optical signal is transmitted through a main path or a standby path core optical fiber according to whether a 1 × 2 optical switch optical downlink interface of the first OMPU card is connected with the first port or the second port. At the far end, the optical signal enters an uplink interface of a second miniature combined and demultiplexed wave mixer through an uplink interface of a third coupler of a second OMPU card of the far-end passive device to be subjected to wave splitting, and 3 paths of optical signals with different wavelengths are separated. And the far-end service equipment AAU correspondingly receives optical signals from the first, second and third ports of the downlink interface of the second miniature combined and demultiplexed wave mixer (CCWDM) by accessing three second color light modules with different wavelengths.
The flow from the far-end service equipment AAU data to the local-end service equipment DU pool is as follows:
the remote service equipment AAU sends optical signals with different wavelengths by accessing three second color optical modules with different wavelengths, and the optical signals with different wavelengths enter the fourth, fifth and sixth ports of the downlink interface of the second miniature combined-decomposed wave mixer of the second OMPU card of the remote passive equipment to be combined so as to transmit the optical signals to the third coupler of the second OMPU card by using the same optical fiber. And the third coupler couples the optical signals into two paths of same optical signals. The two paths of same optical signals are respectively transmitted through a main path optical fiber and a standby path each core optical fiber, namely, the main path and the standby path both have data information of the far-end service equipment AAU.
And the active equipment with network management monitoring at the local end receives the data information transmitted by the main path optical fiber and the standby path optical fiber respectively through the data receiving and transmitting main path port or the standby path port of the first OMPU card. The 1 × 2 optical switch of the first OMPU card is connected to the port of the main data path in a default state, that is, receives data information transmitted by the optical fiber of the main path.
The first OMPU card data receiving and transmitting main path port and the standby path port are respectively provided with a first monitoring probe and a second monitoring probe, and the first monitoring probe and the second monitoring probe are used for detecting optical power data received by the main path port and the standby path port. The NMU network management reads the detected optical power data and judges whether the optical power values detected by the first and second monitoring probes are smaller than a switching threshold value and an alarm threshold value issued by the NMU network management. If the NMU network manager judges that the currently read optical power value is lower than the switching threshold value, the NMU network manager controls the downlink interface of the 1 multiplied by 2 optical switch to be switched from the first port to the second port, namely the main path optical fiber is switched to the standby path optical fiber, receives data information transmitted by the standby path optical fiber, and uploads the switched path information to the NMU network manager.
After the optical signal is routed through the 1 × 2 optical switch of the first OMPU card, the optical signal enters the uplink interface of the first miniature combined and demultiplexed wave mixer through the uplink interface of the 1 × 2 optical switch and is then subjected to wave splitting, and the fourth, fifth and sixth ports of the downlink interface respectively separate optical signals with different wavelengths. The optical signals with different wavelengths are correspondingly received by three first color light modules with different wavelengths accessed by a local side service device DU pool. The optical signals with different central wavelengths are transmitted in the same optical fiber without mutual interference, so the cost of the optical fiber link is greatly reduced by utilizing the wavelength division multiplexing technology.
The invention discloses a base station forward transmission system based on miniature wavelength division semi-active band line protection, which belongs to the field of optical communication. The invention adopts a semi-active transmission system which is composed of active equipment with network management monitoring at a local side and remote passive equipment and has optical line protection, can realize the mixed synchronous transmission of single-fiber bidirectional 3-path services 10G and 25G, and the pure physical transparent transmission of data, realizes ultra-low time delay, triggers an alarm based on signal loss for the single-fiber transmitted service, simultaneously transmits the monitoring data to an operation and maintenance center, and supports a main single-fiber and standby single-fiber double-route full-automatic protection mechanism. The invention only needs to deploy active micro wavelength division equipment with low power consumption and line protection at the local side, supports the Management and control of visual software of working states such as SNMP (simple network Management Protocol), WEB, mobile phone APP and the like through network Management access, and carries out telecommunication-level network protection and Management. The remote end adopts a passive miniature wave division card box with simple design and line protection, and meets the characteristics of controllable, low time delay and low cost of a 5G fronthaul network manager.
In a preferred embodiment, the first OMPU board further includes a fourth coupler, a fifth coupler, a sixth coupler, a seventh coupler, an eighth coupler, a ninth coupler, a third monitor probe, a fourth monitor probe, a fifth monitor probe, a sixth monitor probe, a seventh monitor probe, and an eighth monitor probe; and the third monitoring probe, the fourth monitoring probe, the fifth monitoring probe, the sixth monitoring probe, the seventh monitoring probe and the eighth monitoring probe are respectively connected with the NMU network management card.
The uplink interfaces of the fourth, fifth, sixth, seventh, eighth and ninth couplers are connected with the first, second, third, fourth, fifth and sixth ports of the downlink interface of the first miniature combined wave-splitting mixer, the first ports of the downlink interfaces of the fourth, fifth, sixth, seventh, eighth and ninth couplers are respectively connected with the third, fourth, fifth, sixth, seventh and eighth monitoring probes, and the second ports of the downlink interfaces of the fourth, fifth, sixth, seventh, eighth and ninth couplers are respectively connected with the optical signal interface of the first color light module.
The third, fourth, fifth, sixth, seventh and eighth monitoring probes are respectively used for detecting optical power values of the first, second, third, fourth, fifth and sixth ports of the downlink interface of the first miniature add-drop multiplexer and transmitting the optical power values to the NUM network management card, if the NMU network management judges that the optical power values detected by the third, fourth, fifth, sixth, seventh and eighth monitoring probes are lower than a threshold value set by the network management, the NMU network management reports the alarm information and the detected optical power values to the operation and maintenance center, thereby realizing network management monitoring of the local active device. Through monitoring the transceiving optical power of each channel of the downlink interface of the first miniature combined and decomposed wave mixer, the fault reason is easier to locate and repair.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. The line protection based on micro wavelength division semi-active base station forward transmission system is characterized by comprising a local side service device DU pool, a local side active device with network management monitoring, a far-end passive device and a far-end service device AAU which are connected in sequence; the active equipment with network management monitoring at the office end comprises a first OMPU card, an NMU network management card, a 1U case and three first color light modules with different wavelengths; the remote passive device comprises a second OMPU card and three second color light modules with different wavelengths.
2. The miniature wavelength division based semi-active base station propagation system with line protection of claim 1, wherein the first OMPU card comprises a first miniature combined/demultiplexed wave mixer, a 1 x 2 optical switch, a first monitoring probe, a second monitoring probe, a first coupler and a second coupler; the head end of the first monitoring probe is connected with the first port of the downlink interface of the first coupler; the head end of the second monitoring probe is connected with the first port of the downlink interface of the second coupler; the tail end of the first monitoring probe and the tail end of the second monitoring probe are respectively connected with the NMU network management card; the NMU network management card comprises two electrical ports and two SFP optical ports and is used for communicating a background operation and maintenance server or cascade connection among a plurality of active devices with network management monitoring at the local end so as to transmit monitoring data and switch an automatic or manual mode of line protection; the 1U case is an integrated machine frame, the back of the 1U case is provided with an integrated circuit board along the length direction, the integrated circuit board is provided with a multi-pinhole connecting groove along the length direction, and connecting pins of the first OMPU card and the NMU network pipe card are respectively and correspondingly connected into the multi-pinhole connecting groove; the second OMPU card comprises a second miniature synthesis-demodulation wave mixer and a third coupler.
3. The wdm-based semi-active base station forwarding system with line protection according to claim 2, wherein the upstream interface of the 1 x 2 optical switch is connected to the upstream interface of the first wdm-wdm mixer, a first port of the downstream interface is connected to a second port of the downstream interface of the first coupler, and a second port is connected to a second port of the downstream interface of the second coupler; the uplink interface of the first coupler is connected with the first port of the downlink interface of the third coupler through a main path optical fiber; and the uplink interface of the second coupler is connected with the second port of the downlink interface of the third coupler through a standby optical fiber.
4. The miniature wavelength division based semi-active base station propagation system with line protection of any one of claims 1-3, wherein said first OMPU card is an active board card and said second OMPU card is a passive OMPU card box.
5. The miniature wavelength division based semi-active base station propagation system with line protection of claim 4, wherein the first OMPU board card further comprises a fourth coupler, a fifth coupler, a sixth coupler, a seventh coupler, an eighth coupler, a ninth coupler, a third monitor probe, a fourth monitor probe, a fifth monitor probe, a sixth monitor probe, a seventh monitor probe and an eighth monitor probe; and the third monitoring probe, the fourth monitoring probe, the fifth monitoring probe, the sixth monitoring probe, the seventh monitoring probe and the eighth monitoring probe are respectively connected with the NMU network management card.
6. The miniature wavelength division based semi-active base station propagation system with line protection of claim 5, characterized in that the upstream interfaces of the fourth coupler, the fifth coupler, the sixth coupler, the seventh coupler, the eighth coupler and the ninth coupler are respectively and correspondingly connected with the first, second, third, fourth, fifth and sixth ports of the downstream interface port of the first miniature combined and demultiplexed wave mixer, the first ports of the downlink interfaces of the fourth coupler, the fifth coupler, the sixth coupler, the seventh coupler, the eighth coupler and the ninth coupler are respectively connected with the third monitoring probe, the fourth monitoring probe, the fifth monitoring probe, the sixth monitoring probe, the seventh monitoring probe and the eighth monitoring probe, and second ports of downlink interfaces of the fourth coupler, the fifth coupler, the sixth coupler, the seventh coupler, the eighth coupler and the ninth coupler are respectively connected with an optical signal interface of the first color light module.
7. The wdm-based semi-active base station forwarding system according to any one of claims 1-3, wherein the electrical interface of the first color-light module is connected to the DU pool, and the electrical interface of the second color-light module is connected to the AAU.
8. The wdm-based semi-active base station forwarding system with line protection according to any one of claims 1-3, wherein the upstream interface of the third coupler is connected to the upstream interface of the second wdm mixer; the first, second, third, fourth, fifth and sixth ports of the downlink interface of the second miniature combined and demultiplexed wave mixer are respectively connected with three second color light modules with different wavelengths, and the positions of the three first color light modules with different wavelengths are in one-to-one correspondence with the positions of the three second color light modules with different wavelengths.
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