CN210093235U

CN210093235U - New system of WDM semi-active OLP

Info

Publication number: CN210093235U
Application number: CN201921229946.XU
Authority: CN
Inventors: 李超; 杨超见; 徐荣; 林勇立
Original assignee: Guangzhou Core Communication Technology Co Ltd
Current assignee: Guangzhou Core Communication Technology Co Ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-02-18
Anticipated expiration: 2029-07-31

Abstract

The utility model discloses a new system Of semi-active OLP Of WDM belongs to the communication field, the utility model has the advantages Of keep the passive characteristic Of far-end wavelength division multiplexing equipment, only through increasing active protection shield at the local side, support the OLP protection, report an emergency and ask for help or increased vigilance and trigger based on Loss Of Signal (Loss Of Signal, LOS), need not the signaling interaction, realized OLP protect function. The advantage of passive system cost and the advantage of field installation without power supply are obtained, and the problem of optical layer line protection is solved. 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 transparent transmission of pure physics does not use the agreement and the required chip of agreement on other layers, does not need the process that the agreement was handled, accords with the super low characteristic of 5G fronthaul network to the time delay requirement.

Description

New system of WDM semi-active OLP

Technical Field

The utility model relates to the field of communication technology, especially, relate to a new system of semi-active OLP of WDM.

Background

In an existing active 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 and the like), 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 switching trigger does not need the transmitting and receiving ends to transmit the information of the APS automatic protection switching protocol mutually, so the switching time is fast and the stability is good.

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. In order to ensure the effectiveness and reliability of the two-end switching, the two-end devices need to interact and coordinate the protection switching action through the APS automatic protection switching protocol information. The switching time is therefore somewhat slow.

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.

However, the inventor finds in research and practice that in a 5G fronthaul network, since a 5G active antenna AAU is often installed in a field environment, and if an OLP protection function is to be implemented, a power supply needs to be provided for WDM remote equipment in the field, but the existing active WDM equipment needs to be installed in a machine room environment with constant temperature, constant humidity and stable power supply, so that in the 5G fronthaul network, it is difficult to use the OLP protection function to deal with the risk of insecurity of an optical fiber line.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problem, an embodiment of the present invention provides a new system of WDM semi-active OLP, including a local device and a remote device;

the local side equipment comprises a plurality of optical modules with different wavelengths, a first OPM board card and an OLP board card; the first OPM board card comprises a first wave-combining wave-splitting device; the OLP board card comprises a first probe, an optical switch and an MCU (microprogrammed control Unit) which are arranged at a data receiving and transmitting port, and the probe and the optical switch are respectively connected with the MCU; the OLP board card supports hot plug; the MCU establishes communication connection with the background server;

the remote equipment comprises a plurality of optical modules with different wavelengths and a second OPM board card; the second OPM board card comprises a second wave-combining wave separator and a second optical splitter connected with the second wave-combining wave separator;

the optical switch is connected with the second optical splitter through a main path optical fiber or a standby path optical fiber, and the light splitting proportion of the optical splitter is 50% to 50%.

Preferably, the first OPM board card is an active board card, and the second OPM board card is a passive OPM board card; or the first OPM board card is a passive board card, and the second OPM board card is a passive OPM board card.

Preferably, if the first OPM board card is an active board card, the first OPM board card further includes a first optical splitter, a third optical splitter, a second probe, and a third probe; and the second probe and the third probe are respectively connected with the MCU.

Preferably, an uplink interface of the first optical splitter is connected to an optical input interface of the first OPM board card, a first port of a downlink interface of the first optical splitter is connected to the second probe, and a second port of the downlink interface of the first optical splitter is connected to the first multiplexer/demultiplexer;

the uplink interface of the third optical splitter is connected with the first multiplexer/demultiplexer, the first port of the downlink interface of the third optical splitter is connected with the third probe, and the second port of the downlink interface of the third optical splitter is connected with the light-emitting interface of the first OPM board card.

Preferably, the light splitting ratio of the first port and the second port of the first light splitter is 3%: 97%; the light splitting ratio of the first port and the second port of the third light splitter is 3% to 97%.

Preferably, the optical module of the local-side device is arranged corresponding to the optical module of the remote-end device.

The embodiment of the utility model provides a WDM's semi-active OLP's new system's advantage lies in having kept the passive characteristic of far-end wavelength division multiplexing equipment, only through increasing active protection board at the local side, supports the OLP protection, based on LOSs of Signal (LossOf Signal, LOS) report an emergency and ask for help or increased vigilance and trigger, need not the signaling interaction, realize OLP protect function promptly. The advantage of passive system cost and the advantage of field installation without power supply are obtained, and the line problem of optical layer line protection is solved. 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 transparent transmission of pure physics does not use the agreement and the required chip of agreement on other layers, does not need the process that the agreement was handled, accords with the super low characteristic of 5G fronthaul network to the time delay requirement.

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 new system of WDM semi-active OLP provided by an embodiment of the present invention;

fig. 4 is a block diagram of the structure when the first OPM board card is a passive board card;

FIG. 5 is a block diagram of a second OPM board card;

fig. 6 is a block diagram of the structure when the first OPM card is an active card.

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 electronic 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 at a transmitting end via a Multiplexer (also called a combiner, Multiplexer), and are coupled to the same optical fiber of an optical line for transmission (combining); 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. 3-5, an embodiment of the present invention provides a new system of WDM semi-active OLP, which includes a local device and a remote device;

The optical module of the local side equipment is arranged corresponding to the optical module of the far-end equipment. The optical module of different wavelengths indicates the various light module, and the various light module has standard wavelength, and it is different according to the wavelength division standard, divide into CWDM and DWDM, the embodiment of the utility model provides a support whole various light modules.

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 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 the local end and local end data to the far end as examples.

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 wave-splitting device of the OPM2 board card for wave-combining so as to transmit the optical signals to the optical splitting device 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 a main path optical fiber and an auxiliary path optical fiber respectively, namely the main path and the auxiliary path both have remote data information; .

The central office equipment receives data information transmitted by the main path optical fiber and data information transmitted by the standby path optical fiber through an RX1 port and an RX2 port (RX1 and RX2 ports are data receiving ports) of the OLP, respectively. 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 RX1 port and the RX2 port of the OLP board card are respectively provided with a probe, and the probes are used for detecting optical power data received by the RX1 port and the RX2 port. And the MCU reads the detected optical power data and judges whether the power data detected by the probe is smaller than a switching threshold value and/or an alarm threshold value issued by the network manager. If the MCU judges that the currently read optical power data is lower than the switching threshold, the MCU controls the optical switch to be switched from an RX1 port to an RX2 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 a network manager; if the MCU judges that the currently read optical power data is lower than the alarm threshold but higher than the switching threshold, the MCU reports important alarm information to the network manager.

After the optical signals are routed through the OLP board card, the optical signals enter the wavelength multiplexing/demultiplexing device of the first OPM board card through an optical fiber to be demultiplexed, and optical signals with different wavelengths are separated. And the optical modules with different wavelengths of the local side equipment correspondingly receive the separated optical signals with different wavelengths.

The flow from the local side data to the remote side is as follows:

optical modules with different wavelengths in the local side equipment send optical signals with different wavelengths, the optical signals with different wavelengths enter a wave-combining wave-splitting device of an OPM1 board card for wave-combining, and the optical signals after wave-combining are transmitted to remote end equipment through a main path optical fiber or a standby path optical fiber; the optical signal is transmitted through the main optical fiber or the backup optical fiber according to whether the optical switch of the current OLP board is connected with the RX1 port or the RX2 port. At the far end, the optical signals enter the second OPM board card through the optical splitter to be subjected to wave splitting, and optical signals with different wavelengths are separated. And the optical modules with different wavelengths of the remote equipment correspondingly receive the separated optical signals with different wavelengths. The optical signals with different central wavelengths do not interfere with each other in the same optical fiber, so that the optical signals with different central wavelengths from a plurality of color optical modules can be combined into one path for transmission, and the cost of a link is greatly reduced.

It should be noted that, in the embodiment of the present invention, the first OPM board card may be active or passive.

The embodiment of the utility model provides a new system of semi-active OLP of WDM, through having made optional isolation technique to the income light wavelength, be suitable for the wavelength that all ITU (International Telecommunication Union) standards of CWDM (sparse wavelength division multiplexing) and DWDM (dense wavelength division multiplexing) defined; 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 25GeCPRI 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 WDM's semi-active OLP's new system's advantage lies in having kept the passive characteristic of far-end wavelength division multiplexing equipment, only through increasing active protection board at the local side, supports the OLP protection, based on LOSs of Signal (LossOf Signal, LOS) report an emergency and ask for help or increased vigilance and trigger, need not the signaling interaction, has realized OLP protect function. The advantage of passive system cost and the advantage of field installation without power supply are obtained, and the line problem of optical layer line protection is solved. 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 transparent transmission of pure physics does not use the agreement and the required chip of agreement on other layers, does not need the process that the agreement was handled, accords with the super low characteristic of 5G fronthaul network to the time delay requirement.

Referring to fig. 6, in a preferred embodiment, if the first OPM board card is an active board card, that is, the OPM board card of the local side device is an active board card, if the first OPM board card is an active board card, the first OPM board card further includes a first optical splitter, a third optical splitter, a second probe, and a third probe; and the second probe and the third probe are respectively connected with the MCU.

An uplink interface of the first optical splitter is connected with an optical input interface of the first OPM board card, a first port of a downlink interface of the first optical splitter is connected with the second probe, and a second port of the downlink interface of the first optical splitter is connected with the first wave-combining wave splitter;

the uplink interface of the third optical splitter is connected with the first multiplexer/demultiplexer, the first port of the downlink interface of the third optical splitter is connected with the third probe, and the second port of the downlink interface of the third optical splitter is connected with the light inlet/outlet interface of the first OPM board card

The light splitting proportion of the first port and the second port of the first light splitter is 3% to 97%; the light splitting ratio of the first port and the second port of the third light splitter is also 3% to 97%. Wherein, 3% of the part is used for detecting the incident light power, and 97% of the part enters the wave-combining wave-splitting filter for wave-combining.

And if the MCU judges that the optical power data detected by the probe connected with the optical splitter is lower than a threshold value set by the network management system, the MCU reports the alarm information and the detected optical power to the network management system, thereby realizing network management monitoring.

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

1. A new system of WDM semi-active OLP is characterized in that it comprises local side equipment and remote side equipment;

2. The new system of semi-active OLP for WDM according to claim 1, characterized in that said first OPM board is an active board and said second OPM board is a passive OPM board; or the first OPM board card is a passive board card, and the second OPM board card is a passive OPM board card.

3. The new system of semi-active OLP for WDM of claim 2, characterized in that if said first OPM board is an active board, said first OPM board further comprises a first optical splitter, a third optical splitter, a second probe and a third probe; and the second probe and the third probe are respectively connected with the MCU.

4. The new system of WDM semi-active OLP of claim 3,

5. The new system of semi-active OLP for WDM of claim 4 wherein the splitting ratio of the first port and the second port of the first splitter is 3%: 97%; the light splitting ratio of the first port and the second port of the third light splitter is 3% to 97%.

6. The new system of WDM semi-active OLP of claim 1, wherein said optical module of said local side device is disposed in correspondence with said optical module of said remote side device.