CN212572561U - 5G forwarding equipment based on pure passive WDM technology - Google Patents
5G forwarding equipment based on pure passive WDM technology Download PDFInfo
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- CN212572561U CN212572561U CN202021068360.2U CN202021068360U CN212572561U CN 212572561 U CN212572561 U CN 212572561U CN 202021068360 U CN202021068360 U CN 202021068360U CN 212572561 U CN212572561 U CN 212572561U
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Abstract
The utility model discloses a 5G forward transmission device based on pure passive WDM technology, which comprises a near-end passive multiplexer (1) and a far-end passive demultiplexer (2), wherein a single transmission optical fiber (3) is arranged between the near-end passive multiplexer (1) and the far-end passive demultiplexer (2); the input end of the near-end passive multiplexer (1) is connected with the DU unit (4) through an optical fiber, and the output end of the far-end passive demultiplexer (2) is connected with the AAU unit (5) through an optical fiber. The utility model utilizes a transmission optical fiber wavelength division multiplexing transmission form to bear multipath service data, thereby effectively reducing the use amount of optical fibers and relieving the condition of shortage of optical fiber resources; the utility model has the advantages of low equipment cost, no need of power supply, low electricity charge and low use cost; and simultaneously, the utility model discloses rely on pure optical device to realize completely, installation and maintenance are simple, convenient, the fault rate is low, open fast, need not the network management and maintain.
Description
Technical Field
The utility model relates to a 5G passes equipment before, especially a 5G passes equipment before based on pure passive WDM technique.
Background
The 5G technology is expected to be put into commercialization after 2020, and the 5G market will grow dramatically with the progress of commercialization. According to the 3GPP 5G-RAN functional segmentation, 5G is reconstructed into an AAU (Active Antenna Unit), DU (Distributed Unit), CU (Central Unit) multilevel architecture. The 5G bearing network consists of three parts of forward transmission, intermediate transmission and return transmission, wherein the forward transmission is mainly responsible for network transmission between an antenna site AAU and a baseband site DU/CU. In the existing application, the 5G forward transmission mainly adopts an optical fiber direct drive scheme, and the technical scheme is that an AAU unit and a DU unit are directly connected point to point through an eCPRI forward transmission optical module; the scheme is suitable for the scenes that the AAU and the DU are in the same geographic position, the local floor access under the tower on the tower or the access distance between the AAU and the DU is short (within 2 km) and the optical fiber resources are rich. That is to say, the optical fiber direct drive scheme requires that the forward transmission distance is within 2Km, the optical fiber resource between the AAU and the DU needs to be in direct proportion to the number of optical modules, which is difficult to achieve in the existing 5G networking mode, an operator needs to readjust the distance between the AAU and the DU, and a large number of optical fibers are needed to adapt to the construction of the 5G access network. Therefore, the prior art has the problems of short transmission distance and large consumption of optical fiber.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a 5G onward transmission equipment based on pure passive WDM technique. The utility model has the characteristics of transmission distance is long and the optical fiber consumption is less.
The technical scheme of the utility model: A5G forwarding device based on pure passive WDM technology comprises a near-end passive multiplexer and a far-end passive demultiplexer, wherein a single transmission optical fiber is arranged between the near-end passive multiplexer and the far-end passive demultiplexer; the input end of the near-end passive multiplexer is connected with the DU unit through an optical fiber, and the output end of the far-end passive demultiplexer is connected with the AAU unit through an optical fiber.
In the aforementioned 5G forwarding device based on pure passive WDM technology, a plurality of near-end color light modules are disposed on the DU unit, and each near-end color light module is connected to the DU unit through an optical fiber; a plurality of far-end color light modules are arranged on the AAU unit, and each far-end color light module is connected with the AAU unit through an optical fiber.
In the foregoing 5G forwarding device based on pure passive WDM technology, the near-end passive multiplexer and the far-end passive demultiplexer both include a branch LC interface connector, an optical filter, an optical multiplexer, and a main LC interface connector, which are connected in sequence.
In the foregoing 5G forwarding device based on pure passive WDM technology, the branch LC interface connector includes a branch LC optical interface, and the branch LC optical interface is connected with a branch interface optical fiber.
In the aforementioned 5G forwarding device based on the pure passive WDM technology, the optical filter includes a filtering transmission fiber connected to the branch interface fiber, the filtering transmission fiber is connected to a transparent mirror, and the transparent mirror is connected to a grating.
In the aforementioned 5G forwarding device based on pure passive WDM technology, the optical combiner includes a wave-combining transmission fiber and a light-transmitting mirror.
In the aforementioned 5G forwarding device based on pure passive WDM technology, the main road LC interface connector includes a main road LC optical interface, and the main road LC optical interface is connected with a main road interface optical fiber.
Compared with the prior art, the utility model discloses constitute by near-end passive multiplexer, transmission fiber and distal end passive demultiplexer, near-end passive multiplexer is in DU unit side (5G computer lab side), and distal end passive demultiplexer is in AAU unit side (5G launching tower side), and 5G communication light signal between near-end passive multiplexer and the distal end passive demultiplexer uses single transmission fiber to transmit, and is small, light in weight, small and exquisite light, can carry in a flexible way and install. The utility model utilizes a transmission optical fiber wavelength division multiplexing transmission form to bear multipath service data, thereby effectively reducing the use amount of optical fibers and relieving the condition of shortage of optical fiber resources; the utility model has the advantages of low equipment cost, no need of power supply, low electricity charge and low use cost; the utility model discloses rely on pure optical device to realize, installation and maintenance are simple, convenient, the fault rate is low, open fast, need not the network management and maintain. And simultaneously, the utility model discloses set up the glory module on AAU and DU equipment, need not to change AAU, DU equipment module, the module is with low costs, transmits in order to save the optic fibre resource through the multiplexing a plurality of wavelengths of passive multiplexer-demultiplexer, and the transmission distance of glory module can reach 40Km, can support 10Km, 20Km, 40 Km's engineering transmission distance, and the transmission requirement of short distance in 100% satisfied enlarges transmission distance. In addition, the utility model has strong environmental adaptability, waterproof, dustproof and high and low temperature resistant, and can be applied in various complex environments; and the compatibility is strong. To sum up, the utility model has the characteristics of transmission distance is long and the optic fibre consumes less.
Drawings
Fig. 1 is a connection view of the present invention.
The labels in the figures are: the system comprises a 1-near-end passive multiplexer, a 2-far-end passive demultiplexer, a 3-transmission optical fiber, a 4-DU unit, a 5-AAU unit, a 6-near-end color light module and a 7-far-end color light module.
Detailed Description
The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.
Examples are given. A5G forwarding device based on pure passive WDM technology is composed as shown in FIG. 1, and comprises a near-end passive multiplexer 1 and a far-end passive demultiplexer 2, wherein a single transmission fiber 3 is arranged between the near-end passive multiplexer 1 and the far-end passive demultiplexer 2; the input end of the near-end passive multiplexer 1 is connected with the DU unit 4 through an optical fiber, and the output end of the far-end passive demultiplexer 2 is connected with the AAU unit 5 through an optical fiber.
A plurality of near-end color light modules 6 are arranged on the DU unit 4, and each near-end color light module 6 is connected with the DU unit 4 through an optical fiber; a plurality of far-end color light modules 7 are arranged on the AAU unit 5, and each far-end color light module 7 is connected with the AAU unit 5 through an optical fiber.
The near-end passive multiplexer 1 and the far-end passive demultiplexer 2 respectively comprise a branch LC interface connector, an optical filter, an optical multiplexer and a main circuit LC interface connector which are sequentially connected.
The branch LC interface connector comprises a branch LC optical interface, and the branch LC optical interface is connected with a branch interface optical fiber.
The optical filter comprises a filtering transmission optical fiber connected with the branch interface optical fiber, the filtering transmission optical fiber is connected with a light-transmitting mirror, and the light-transmitting mirror is connected with a grating.
The optical multiplexer comprises a multiplexing transmission optical fiber and a light-transmitting mirror.
The main road LC interface connector comprises a main road LC optical interface, and the main road LC optical interface is connected with a main road interface optical fiber.
And two ends of the transmission optical fiber are respectively connected with the corresponding main road LC interface connectors.
The color light module on the DU unit is connected with a branch LC interface connector of the near-end passive multiplexer through an optical fiber and an optical fiber connector, the 5G signal is transmitted to the near-end passive multiplexer through the optical fiber, the near-end passive multiplexer transmits the 5G signal to the far-end passive multiplexer through the transmission optical fiber, and finally the 5G signal is transmitted to the AAU unit through the optical fiber. The near-end passive multiplexer is arranged on a DU side (5G machine room side), the far-end passive demultiplexer is arranged on an AAU side (5G launching tower side), and 5G communication optical signals between the near-end passive multiplexer and the far-end passive demultiplexer are transmitted by using transmission optical fibers.
The 5G communication optical signal is composed of various digital signals such as an internet of things signal, a voice signal, an internet signal, a video signal and the like.
The near-end passive multiplexer consists of: the main circuit comprises a branch LC interface connector, an optical filter, namely an optical wavelength selector, an optical multiplexer and a main circuit LC interface connector.
The branch LC interface connector is formed by: the optical fiber multiplexer comprises an LC optical interface and G.652 optical fibers, wherein a 6-channel multiplexer needs a 6-channel branch LC interface connector; a multiplexer of 12 channels requires 12 branch LC interface connectors; the number is determined according to the number of optical paths supported by the multiplexer device. The main function is to connect the color light module at the DU side and introduce the 5G signal transmitted in the 5G into the 5G forward transmission equipment.
The optical filter solves the problem of splitting optical signals, mainly plays a role in selecting optical wavelengths, and consists of a G.652 optical fiber, a light-transmitting mirror and a grating, wherein the G.652 optical fiber is mainly connected with a branch LC interface connector, and the light-transmitting mirror is connected with the G.652 optical fiber and the grating to correct the direction of the optical signals. The grating is connected with the light-transmitting mirror, the light signals with different wavelengths are selected by utilizing the principle that the diffraction directions of different wavelengths are different, and the selected light signals enter the light-transmitting mirror, pass through the G.652 optical fiber and then enter the wave combiner.
The wave combiner mainly comprises: g.652 fiber, light-transmitting mirror. The various optical signals from the optical filter enter the light transmitting mirror, and the light transmitting mirror can correct the directions of the optical signals with various wavelengths, so that the optical signals with various wavelengths are uniformly transmitted in one direction and enter the main path LC interface connector.
The main LC interface connector is the same as the branch LC interface connector and consists of an LC optical interface and a G.652 optical fiber. The optical signals of various wavelengths from the combiner are transmitted into the transmission optical fiber through the main path LC interface connector.
The remote passive demultiplexer device is also composed of: the main circuit comprises a branch LC interface connector, an optical filter, namely an optical wavelength selector, an optical multiplexer and a main circuit LC interface connector. Meanwhile, the branch LC interface connector, the optical filter, i.e., the optical wavelength selector, the optical multiplexer, and the main LC interface connector are the same as the near-end passive multiplexer device, and thus, the description thereof will not be repeated.
The method supports 1:4/1:6/1:8/1:12/1:16/1:18, supports point-to-point and chain type networking, flexibly selects according to needs, and refines investment;
the compatibility is strong: the method is suitable for various CPRI/eCPRI interface scenes of main stream friends 1G/2G/5G/6G/10G/25G, Ethernet and SDH interfaces and the like.
Claims (7)
1. A5G forwarding device based on pure passive WDM technology is characterized in that: the optical fiber transmission line comprises a near-end passive multiplexer (1) and a far-end passive demultiplexer (2), wherein a single transmission optical fiber (3) is arranged between the near-end passive multiplexer (1) and the far-end passive demultiplexer (2); the input end of the near-end passive multiplexer (1) is connected with the DU unit (4) through an optical fiber, and the output end of the far-end passive demultiplexer (2) is connected with the AAU unit (5) through an optical fiber.
2. A pure passive WDM technology-based 5G forwarding device according to claim 1, wherein: a plurality of near-end color light modules (6) are arranged on the DU unit (4), and each near-end color light module (6) is connected with the DU unit (4) through an optical fiber; a plurality of far-end color light modules (7) are arranged on the AAU unit (5), and each far-end color light module (7) is connected with the AAU unit (5) through an optical fiber.
3. A pure passive WDM technology-based 5G forwarding device according to claim 1, wherein: the near-end passive multiplexer (1) and the far-end passive demultiplexer (2) respectively comprise a branch LC interface connector, an optical filter, an optical combiner and a main circuit LC interface connector which are sequentially connected.
4. A pure passive WDM technology based 5G forwarding device according to claim 3, wherein: the branch LC interface connector comprises a branch LC optical interface, and the branch LC optical interface is connected with a branch interface optical fiber.
5. A pure passive WDM technology based 5G forwarding device according to claim 3, wherein: the optical filter comprises a filtering transmission optical fiber connected with the branch interface optical fiber, the filtering transmission optical fiber is connected with a light-transmitting mirror, and the light-transmitting mirror is connected with a grating.
6. A pure passive WDM technology based 5G forwarding device according to claim 3, wherein: the optical multiplexer comprises a multiplexing transmission optical fiber and a light-transmitting mirror.
7. A pure passive WDM technology based 5G forwarding device according to claim 3, wherein: the main road LC interface connector comprises a main road LC optical interface, and the main road LC optical interface is connected with a main road interface optical fiber.
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| CN202021068360.2U CN212572561U (en) | 2020-06-11 | 2020-06-11 | 5G forwarding equipment based on pure passive WDM technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022188032A1 (en) * | 2021-03-09 | 2022-09-15 | 华为技术有限公司 | Optical communication system and method, optical module, and apparatus applied to optical module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022188032A1 (en) * | 2021-03-09 | 2022-09-15 | 华为技术有限公司 | Optical communication system and method, optical module, and apparatus applied to optical module |
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