CN115842778A - Optical communication system, dual-homing protection method and communication system - Google Patents

Abstract

The present application relates to the field of optical communications, and in particular, to an optical communication system, a dual homing protection method, and a communication system. The optical communication system comprises a dual-homing protection device, a first optical communication device, a second optical communication device and a third optical communication device. The dual-return protection device is connected with the first optical communication device through the first optical fiber and the second optical fiber, the dual-return protection device is connected with the second optical communication device through the third optical fiber, and the dual-return protection device is connected with the third optical communication device through the fourth optical fiber. The dual-homing protection device may establish an optical path between the first optical fiber and the fourth optical fiber, or between the second optical fiber and the third optical fiber or the fourth optical fiber upon detection of a failure in one or more of the first optical fiber, the third optical fiber, the second optical communication device. By adopting the optical communication system and the dual-homing protection method provided by the application, the reliability of the forward network and the private network can be improved.

Description

An optical communication system, a dual-homing protection method, and a communication system

technical field

The present application relates to the technical field of communication, and in particular to an optical communication system, a dual-homing protection method and a communication system.

Background technique

With the continuous development of optical communication technology, the fronthaul (ie fronthaul) network or private line network implemented based on the optical network architecture is gradually becoming popular. The fronthaul network implements remote equipment (such as remote radio unit (RRU) or active antenna unit (active antenna unit, AAU)) and central office equipment (such as baseband processing unit (building baseband unit, BBU) or Service data transmission between distributed units (distributed unit, DU)). The dedicated line network realizes service data transmission between remote equipment (such as customer premise equipment (CPE)) and central office equipment (such as cloud access point (point of presence, POP) equipment). Due to the importance of the fronthaul network or the private line network, people pay more and more attention to the reliability and practicability of the optical communication system adopted by the fronthaul network or the private line network.

In the optical communication system of the existing fronthaul network or dedicated line network, the main and standby switching mechanism is formed mainly through the two main optical fibers between the remote equipment and the central office equipment, so as to realize the protection for the main optical fiber. However, the existing fronthaul network or dedicated line network can only realize single-homing protection for the backbone optical fiber, and it cannot realize redundant protection for the side of the central office equipment. Once a failure occurs on the side of the central office equipment, all services between the remote equipment and the central office equipment will be interrupted. Therefore, the reliability of the current fronthaul network or dedicated line network is poor.

Contents of the invention

To this end, the application provides an optical communication system, a dual-homing protection method, and a communication system, which can realize dual-homing protection for the backbone optical fiber and the central office equipment in the fronthaul network or dedicated line network, and can improve the security of the fronthaul network or dedicated line network. reliability.

In a first aspect, the embodiment of the present application provides an optical communication system. The optical communication system includes a dual-homing protection device, a first optical communication device, a second optical communication device, a third optical communication device, a first optical fiber, a second optical fiber, a third optical fiber and a fourth optical fiber. The dual-homing protection device is connected to the first optical communication device through the first optical fiber and the second optical fiber. The dual-homing protection device is connected to the second optical communication device through the third optical fiber, and the dual-homing protection device is connected to the third optical communication device through the fourth optical fiber. The dual-homing protection device is configured to, when it is detected that one or more of the first optical fiber, the third optical fiber, and the second optical communication device are faulty, between the first optical fiber and the fourth optical fiber between the optical fibers, or between the second optical fiber and the third optical fiber or the fourth optical fiber, so that the signal light travels between the first optical communication device and the second optical communication device or the between the third optical communication devices.

It should be understood that, in the above optical communication system, spare parts are provided for both the first optical fiber and the second optical communication device connected by the third optical fiber. For example, the first optical fiber is provided with a spare second optical fiber, and the third optical fiber is provided with a spare fourth optical fiber. The second optical communication device is also provided with a spare third optical communication device. Therefore, as long as the dual-homing protection device detects that one or more of the first optical fiber, the third optical fiber, and the second optical communication device fails, it can switch the failed optical fiber or optical communication device to its spare part. Therefore, the optical communication system can implement dual-homing protection for the second optical fiber and the second optical communication device through the dual-homing protection device. Applying the above-mentioned optical communication system to the fronthaul network or dedicated line network can realize the dual-homing protection for the backbone optical fiber and the central office equipment, which can improve the reliability of the fronthaul network or the dedicated line network.

With reference to the first aspect, in a feasible implementation manner, the dual-homing protection device includes: a first optical coupler, a second optical coupler, a third optical coupler, a fourth optical coupler, a first optical switch group, a second optical switch group, a first controller, and a second controller, the first optical coupler is respectively connected to the first controller and the first optical switch group, and the first controller also respectively connected to the first optical switch group and the third optical coupler, the first optical switch group is also connected to the second optical switch group, and the second optical switch group is also connected to the The second optocoupler, the second controller and the fourth optocoupler are connected, and the second controller is also connected to the second optocoupler and the fourth optocoupler respectively , the first controller is connected with the second controller, the first optical coupler is connected with the first optical communication device through the first optical fiber, and the second optical coupler is connected through the The second optical fiber is connected to the first optical communication device, the third optical coupler is connected to the second optical communication device through the third optical fiber, and the fourth optical coupler is connected to the second optical communication device through the first Four optical fibers are connected to the third optical communication device.

With reference to the first aspect, in a feasible implementation manner, the signal light further includes fourth signal light sent to the first optical coupler through the first optical fiber. The first optical coupler is used to obtain the seventh sub-signal light and the eighth sub-signal light according to the light splitting of the fourth signal light, transmit the seventh sub-signal light to the first controller, and send the The eighth sub-signal light is transmitted to the first optical switch group. The first controller is configured to determine that the optical power of the seventh sub-signal light is zero, or determine that the second optical power difference between the optical power of the seventh sub-signal light and the second preset optical power is equal to Or when the difference is greater than the second preset difference, it is determined that the first optical fiber is faulty. The first controller judges whether the first optical fiber fails by means of optical power detection, which is simple and easy to implement, and can reduce the structural complexity and cost of the dual-homing protection device.

With reference to the first aspect, in a feasible implementation manner, the signal light further includes first signal light sent to the third optical coupler through the third optical fiber. The third optical coupler is used to obtain the first sub-signal light and the second sub-signal light according to the light splitting of the first signal light, transmit the first sub-signal light to the first controller, and transmit the The second sub-signal light is transmitted to the first optical switch group. The first controller is configured to determine that the optical power of the first sub-signal light is zero, or determine that the first optical power difference between the optical power of the first sub-signal light and the first preset optical power is equal to Or when the difference is greater than the first preset difference, it is determined that the third optical fiber is faulty. The second controller also judges whether the second optical fiber fails by means of optical power detection, which can further reduce the structural complexity and cost of the dual-homing protection device.

With reference to the first aspect, in a feasible implementation manner, the first controller is further configured to, when determining that the first optical power difference is smaller than the first preset difference, determine the first sub- Whether the signal light contains the target pitch signal. Wherein, the target top adjustment signal is a top adjustment signal preconfigured by the first signal light. If it is determined that the first sub-signal light does not include the target pitch signal, it is determined that a fault occurs in the second optical communication device. The first controller judges whether the third optical fiber is faulty by detecting the optical power, and further judges whether the second optical communication is faulty by detecting whether the first sub-signal light contains the target top adjustment signal in the case of determining that the third optical fiber is not faulty. Whether the device fails, so that the fault detection for the third optical fiber and the pure optical layer of the second optical communication device can be realized.

With reference to the first aspect, in a feasible implementation manner, the signal light further includes the second signal light sent to the second optical coupler through the second optical fiber and the second signal light sent to the second optical coupler through the fourth optical fiber. The third signal light sent by the fourth optical coupler. The second optical coupler is used to obtain third sub-signal light and fourth sub-signal light according to the light splitting of the second signal light, transmit the third sub-signal light to the second controller, and transfer the The fourth sub-signal light is transmitted to the second optical switch group. The fourth optical coupler is used to obtain fifth sub-signal light and sixth sub-signal light according to the light splitting of the third signal light, transmit the fifth sub-signal light to the second controller, and transfer the The sixth sub-signal light is transmitted to the second optical switch group. The second controller is configured to determine whether the second optical fiber is faulty according to the third sub-signal light. The second controller is further configured to determine whether the fourth optical fiber and/or the third optical communication device fails according to the fifth sub-signal light.

With reference to the first aspect, in a feasible implementation manner, the first controller is configured to, when it is determined that the first optical fiber is faulty and the third optical fiber and the second optical communication device are not faulty, controlling the first optical switch group to establish an optical path between the second optical switch group and the third optical coupler, and sending first indication information to the second controller. The second controller is configured to receive the first indication information, and control the second optical switch group to connect between the second optical coupler and the first optical fiber when it is determined that the second optical fiber is not faulty. An optical path is established between the switch groups, so as to transmit the fourth sub-signal light to the second optical communication device through the third optical fiber, and transmit the second sub-signal light to the second optical communication device through the second optical fiber. The first optical communication device. When the dual-homing protection device determines that the first optical fiber is faulty and the third optical fiber and the second optical communication device are not faulty, the second optical fiber can be used instead of the first optical fiber to transmit the corresponding service data, thus enabling optical communication The system enables fault protection for the first optical fiber.

With reference to the first aspect, in a feasible implementation manner, the first controller is configured to determine that the first optical fiber is not faulty and the third optical fiber and/or the second optical communication device is faulty Next, controlling the first optical switch group to establish an optical path between the first optical coupler and the second optical switch group, and sending second instruction information to the second controller. The second controller is configured to receive the second indication information, and control the second optical switch group to switch between the first optical fiber and the third optical communication device when it is determined that there is no fault in the fourth optical fiber An optical path is established between the switch group and the fourth optical coupler, so as to transmit the sub-signal light provided by the first optical coupler to the third optical communication device through the fourth optical fiber, and transmit the sub-signal light provided by the first optical coupler to the third optical communication device through the fourth optical fiber. The first optical fiber transmits the sixth sub-signal light to the first optical communication device. When the dual-homing protection device determines that the first optical fiber is not faulty and the third optical fiber and/or the second optical communication device fails, the third optical fiber and the second optical communication device can be replaced by the spare fourth optical fiber and the third optical communication device The device transmits corresponding service data, so that the optical communication system can also implement fault protection for the third optical fiber and the second optical communication device.

With reference to the first aspect, in a feasible implementation manner, the first controller is configured to determine the first optical fiber and the third optical fiber, or the first optical fiber, the third optical fiber and the When all the second optical communication devices fail, send third indication information to the second controller. The second controller is configured to receive the third indication information, and control the second optical switch when it is determined that the second optical fiber, the fourth optical fiber, and the third optical communication device are not faulty. establishing an optical path between the second optical coupler and the fourth optical coupler, so as to transmit the fourth sub-signal light to the third optical communication device through the fourth optical fiber, and transmit the fourth sub-signal light to the third optical communication device through the The second optical fiber transmits the sixth sub-signal light to the first optical communication device.

With reference to the first aspect, in a feasible implementation manner, when it is determined that the first optical fiber and the second optical fiber fail, the second controller is configured to output service interruption alarm information, wherein the The service interruption alarm information is used to indicate that service interruption occurs between the first optical communication device, the second optical communication device, and the third optical communication device.

With reference to the first aspect, in a feasible implementation manner, the second optical communication device includes a first multiplexer/demultiplexer, N first branch optical fibers, and N first optical transceivers. Wherein, each first optical transceiver is connected to the third optical fiber through a branch optical fiber and the first multiplexer/demultiplexer, and N is a positive integer greater than or equal to 2. The N first optical transceivers are used to generate N first branch signal lights, and respectively transmit the N first branch signal lights to the first combination through the N first branch optical fibers. Splitter. Wherein, each first branch signal light in the N first branch signal lights is pre-configured with a first branch top adjustment signal. The first multiplexer/demultiplexer is used to combine the N first branch signal lights to obtain the first signal light, and transmit the first signal light to the third optical fiber through the third optical fiber. optocoupler. The third optical coupler is configured to split light according to the first signal light to obtain first sub-signal light, and send the first sub-signal light to the first controller. The first controller is further configured to determine whether the first sub-signal lights include the N first branch signal lights when it is determined that the first optical power difference is smaller than the first preset difference Each of the first branch signal light corresponds to the first branch top adjustment signal. If the first controller determines that the first sub-signal light does not include the first branch top adjustment signal preconfigured by the M first branch signal lights in the N first branch signal lights, then determine The M first optical transceivers used to generate the M first branch signal lights fail. Wherein, M is a positive integer greater than or equal to 1.

With reference to the first aspect, in a feasible implementation manner, the third optical communication device includes a second multiplexer/demultiplexer, N second branch optical fibers, and N second optical transceivers, and each second optical The transceiver is connected to the fourth optical fiber through a second branch optical fiber and the second multiplexer/demultiplexer, and the N first optical transceivers are in one-to-one correspondence with the N second optical transceivers . The first controller is configured to control the first optical switch group between the first optical coupler and the second optical switch group when it is determined that the M first optical transceivers fail. Establish an optical path, and send fourth indication information to the second controller. The second controller is configured to receive the fourth indication information, and control the second optical switch group when it is determined that the second optical fiber, the fourth optical fiber, and the third optical communication device are not faulty. Establishing an optical path between the second optical fiber and the fourth optical fiber to pass through the M second optical transceivers corresponding to the M first optical transceivers among the N second optical transceivers to replace the M first optical transceivers that have failed to transmit corresponding signal light.

In the above implementation, when the M first optical transceivers in the second optical communication device fail, the dual-homing protection device can switch the transmission services carried by the failed M first optical transceivers to the third optical transceiver. on the corresponding M second optical transceivers in the communication device. In this way, protection for one or more optical transceivers in the second optical communication device can be realized, and the diversity of functions of the optical communication system can be improved.

With reference to the first aspect, in a feasible implementation manner, the fourth indication information includes at least first identification information corresponding to the M first optical transceivers and faults corresponding to the multiple first optical transceivers. state information, the fault state information is used to indicate a fault state, and the first controller is also connected to the second optical communication device. The first controller is further configured to send the fourth indication information to the second optical communication device, so as to inform the second optical communication device that the M first optical transceivers have failed.

With reference to the first aspect, in a feasible implementation manner, the second controller is further connected to the third optical communication device. The third optical communication device is configured to, after determining that the M second optical transceivers start to replace the M first optical transceivers to transmit the corresponding first branch signal light, send a message to the second control The device sends the second handover completion indication information. Wherein, the second switching completion indication information includes at least second identification information corresponding to the M second optical transceivers and non-fault status information corresponding to the M second optical transceivers, the non-fault status information Used to indicate a non-faulty state.

The second controller is further configured to forward the second switching completion indication information to the first controller and/or the second optical communication device.

With reference to the first aspect, in a feasible implementation manner, the optical communication system further includes a fourth optical communication device, a fifth optical communication device, a sixth optical communication device, a fifth optical fiber, a sixth optical fiber, and a seventh optical fiber and the eighth optical fiber, the dual-homing protection device further includes a fifth optical coupler, a sixth optical coupler, a seventh optical coupler and an eighth optical coupler. The fourth optical communication device is connected to the fifth optical coupler through the fifth optical fiber. The fourth optical communication device is also connected to the sixth optical coupler through the sixth optical fiber. The fifth optical coupler is also connected to the first controller and the first optical switch group respectively. The sixth optical coupler is also connected to the second controller and the second optical switch group respectively. The fifth optical communication device is connected to the seventh optical coupler through the seventh optical fiber, and the seventh optical coupler is respectively connected to the first controller and the first optical switch group. The sixth optical communication device is connected to the eighth optical coupler through an eighth optical fiber, and the eighth optical coupler is also connected to the second controller and the second optical switch group respectively. The first optical switch group is connected to the second optical switch group through a ninth optical fiber.

With reference to the first aspect, in a feasible implementation manner, the first controller is configured to, when it is determined that the first optical fiber is faulty and the third optical fiber and the second optical communication device are not faulty, In combination with the second controller, the first optical switch group and the second optical switch group are controlled to establish a first optical path between the second optical coupler and the third optical coupler. Wherein, the first optical path passes through the ninth optical fiber. The first controller is further configured to determine that the fifth optical fiber is faulty according to the sub-signal light provided by the fifth optical coupler and determine that the seventh optical fiber is faulty according to the sub-signal light provided by the seventh optical coupler. and sending fifth indication information to the second controller when the optical fiber and the fifth optical communication device have no failure. The second controller is configured to receive the fifth indication information, and control the second optical switch group when it is determined that the second optical fiber, the fourth optical fiber, and the third optical communication device are not faulty. Establishing a second optical path between the second optical coupler and the fourth optical coupler to complete the second optical communication device through the third optical communication device instead of the second optical communication device transmission of signal light with the first optical communication device. The third optical communication device is configured to send first switching completion indication information to the first controller and the second controller after it is determined to completely replace the second optical communication device. After both the first controller and the second controller receive the first switching completion indication information, the first controller controls the first optical switch group and the second optical switch group in combination with the second controller. The two optical switch groups disconnect the first optical path.

With reference to the first aspect, in a feasible implementation manner, after the first optical path is disconnected, the first controller is further configured to control the first optical switch group to switch between the seventh optical coupler An optical path is established with the second optical switch group, and sixth indication information is sent to the second controller. The second controller is configured to receive the sixth indication information, and control the second optical switch group to switch between the sixth optical coupler and the first optical fiber when it is determined that the seventh optical fiber is not faulty. An optical path is established between the switch groups, so that an optical path is established between the fourth optical communication device and the fifth optical communication device through the sixth optical fiber, the ninth optical fiber and the seventh optical fiber. In the case where the optical communication system includes multiple primary circuits and backup circuits, and the multiple primary circuits and backup circuits share the dual-homing protection device, the dual-homing protection device can completely switch over the first primary circuit that fails first. Release the occupied shared ninth optical fiber to its corresponding first backup route, and then further control the second main route that fails later to switch to the second backup route, so that it can effectively solve the problem caused by the ninth optical fiber being occupied. The resulting problem of being unable to provide fault protection for multiple main circuits at the same time can further improve the practicability of the optical communication system.

In the second aspect, the embodiment of the present application provides a dual-homing protection method. The dual-homing protection method is applied to the optical communication system provided in the first aspect above. The optical communication system includes a dual-homing protection device, a first optical communication device, a second optical communication device, a third optical communication device, a first optical fiber, a second optical fiber, a third optical fiber and a fourth optical fiber, the dual-homing protection device It is connected to the first optical communication device through the first optical fiber and the second optical fiber, the dual-homing protection device is connected to the second optical communication device through the third optical fiber, and the dual-homing protection device is connected to the second optical communication device through the third optical fiber. The protection device is connected to the third optical communication device through the fourth optical fiber. The method includes using the dual-homing protection device to detect whether one or more of the first optical fiber, the third optical fiber, and the second optical communication device is faulty. When it is determined by the dual-homing protection device that one or more of the first optical fiber, the third optical fiber, and the second optical communication device is faulty, the dual-homing protection device is used in the first optical fiber and the fourth optical fiber, or establish an optical path between the second optical fiber and the third optical fiber or the fourth optical fiber, so that signal light communicates with the second optical fiber in the first optical communication device devices or the third optical communication device.

It should be understood that, in the above implementation, based on the optical communication system provided in the first aspect, as long as the dual-homing protection device detects that one or more of the first optical fiber, the third optical fiber, and the second optical communication device If there is a fault, the faulty optical fiber or optical communication device can be switched to its spare part. Therefore, the dual-homing protection for the second optical fiber and the second optical communication device can be realized through the dual-homing protection method in the optical communication system. Therefore, applying the above method and optical communication system to the fronthaul network or the private line network can enable the fronthaul network or the private line network to realize dual-homing protection for the backbone optical fiber and the central office equipment, and can improve the reliability of the fronthaul network or the private line network.

With reference to the second aspect, in a feasible implementation manner, the dual-homing protection device includes a first optical coupler, a second optical coupler, a third optical coupler, a fourth optical coupler, a first optical switch group , a second optical switch group, a first controller and a second controller, the first optical coupler is respectively connected to the first controller and the first optical switch group, and the first controller is also respectively It is connected with the first optical switch group and the third optical coupler, the first optical switch group is also connected with the second optical switch group, and the second optical switch group is also connected with the The second optical coupler, the second controller and the fourth optical coupler are connected, and the second controller is also connected to the second optical coupler and the fourth optical coupler respectively, The first controller is connected to the second controller, the first optical coupler is connected to the first optical communication device through the first optical fiber, and the second optical coupler is connected through the The second optical fiber is connected to the first optical communication device, the third optical coupler is connected to the second optical communication device through the third optical fiber, and the fourth optical coupler is connected to the second optical communication device through the fourth The optical fiber is connected to the third optical communication device.

With reference to the second aspect, in a feasible implementation manner, the signal light further includes first signal light sent to the third optical coupler through the third optical fiber. The first signal light may be split by the third optical coupler to obtain first sub-signal light and second sub-signal light. The first sub-signal light may be transmitted to the first controller through the third optical coupler, and the second sub-signal light may be transmitted to the first optical switch group. When it is determined by the first controller that the optical power of the first sub-signal light is zero, or the first optical power difference between the optical power of the first sub-signal light and the first preset optical power is determined to be equal to Or when the difference is greater than the first preset difference, it is determined that the third optical fiber is faulty.

With reference to the second aspect, in a feasible implementation manner, when the first controller determines that the first optical power difference is smaller than the first preset difference, the first controller determines Whether the first sub-signal light includes a target top adjustment signal, wherein the target top adjustment signal is a top adjustment signal preconfigured by the first signal light. If it is determined by the first controller that the first sub-signal light does not contain the target pitch signal, it is determined that the second optical communication device is faulty.

With reference to the second aspect, in a feasible implementation manner, the signal light further includes fourth signal light sent to the first optical coupler through the first optical fiber. The fourth signal light can be split by the first optical coupler to obtain the seventh sub-signal light and the eighth sub-signal light, and the seventh sub-signal light is transmitted to the first controller, and the eighth sub-signal light is transmitted to the first controller. The sub signal light is transmitted to the first optical switch group. When it is determined by the first controller that the optical power of the seventh sub-signal light is zero, or it is determined that the second optical power difference between the optical power of the seventh sub-signal light and the second preset optical power is equal to or greater than When the second preset difference is reached, it is determined that the first optical fiber is faulty.

With reference to the second aspect, in a feasible implementation manner, the signal light further includes the second signal light sent by the first optical communication device to the second optical coupler through the second optical fiber and the The third optical communication device transmits the third signal light to the fourth optical coupler through the fourth optical fiber. The second signal light can be split by the second optical coupler to obtain a third sub-signal light and a fourth sub-signal light, and the third sub-signal light can be transmitted to the second controller, and the The fourth sub-signal light is transmitted to the second optical switch group. The third signal light can be split by the fourth optical coupler to obtain fifth sub-signal light and sixth sub-signal light, and the fifth sub-signal light can be transmitted to the second controller, and the obtained The sixth sub-signal light is transmitted to the second optical switch group. Whether a fault occurs in the second optical fiber may be determined according to the third sub-signal light through the second controller. Whether the fourth optical fiber and/or the third optical communication device fails can be determined according to the fifth sub-signal light by the second controller.

With reference to the second aspect, in a feasible implementation manner, when it is determined by the first controller that the first optical fiber is faulty and the third optical fiber and the second optical communication device are not faulty, The first controller may control the first optical switch group to establish an optical path between the second optical switch group and the third optical coupler, and send a first instruction to the second controller information. The first indication information is received by the second controller. When it is determined by the second controller that the second optical fiber is not faulty, the second controller controls the second optical switch group between the second optical coupler and the first optical switch Create light paths between groups.

With reference to the second aspect, in a feasible implementation manner, when it is determined by the first controller that the first optical fiber is not faulty and the third optical fiber and/or the second optical communication device is faulty Next, the first controller controls the first optical switch group to establish an optical path between the first optical coupler and the second optical switch group, and sends a second Instructions. Receive the second indication information through the second controller, and when the second controller determines that the fourth optical fiber and the third optical communication device are not faulty, through the second controller and controlling the second optical switch group to establish an optical path between the first optical switch group and the fourth optical coupler.

With reference to the second aspect, in a feasible implementation manner, after the first controller determines the first optical fiber and the third optical fiber, or the first optical fiber, the third optical fiber and the When all the second optical communication devices fail, the first controller sends third indication information to the second controller. The third indication information is received by the second controller, and when the second controller determines that the second optical fiber, the fourth optical fiber, and the third optical communication device are all fault-free, The second optical switch group is controlled by the second controller to establish an optical path between the second optical coupler and the fourth optical coupler.

With reference to the second aspect, in a feasible implementation manner, if the first controller determines that the first optical fiber is faulty, if the second controller determines that the second optical fiber is faulty , output service interruption warning information through the second controller. Wherein, the service interruption alarm information is used to indicate that service interruption occurs between the first optical communication device, the second optical communication device, and the third optical communication device.

With reference to the second aspect, in a feasible implementation manner, the second optical communication device includes a first multiplexer/demultiplexer, N first branch optical fibers, and N first optical transceivers, and each first optical The transceiver is connected to the third optical fiber through a branch optical fiber and the first multiplexer/demultiplexer, and the first sub-signal light is connected to the first multiplexer/demultiplexer by the third optical coupler obtained by splitting the first signal light transmitted through the third optical fiber. The first signal light is obtained by combining the N first branch signal lights transmitted on the N first branch optical fibers by the first multiplexer/demultiplexer. The N first branch signal lights are generated by the N first optical transceivers and transmitted to the N first branch optical fibers. Each first branch signal light of the N first branch signal lights is pre-configured with a branch top adjustment signal. N is a positive integer greater than or equal to 2. When it is determined by the first controller that the first optical power difference is smaller than the first preset difference, it is determined by the first controller whether the first sub-signal light contains the Nth A branch signal light is a preconfigured branch signal light. If it is determined by the first controller that the first sub-signal light does not contain the branch top-tuning signal pre-configured by the M first branch signal lights in the N first branch signal lights, then determine The M first optical transceivers used to generate the M first branch signal lights fail. Wherein, M is a positive integer greater than or equal to 1.

With reference to the second aspect, in a feasible implementation manner, the third optical communication device includes a second multiplexer/demultiplexer, N second branch optical fibers, and N second optical transceivers, and each second optical The transceiver is connected to the fourth optical fiber through a second branch optical fiber and the second multiplexer/demultiplexer, and the N first optical transceivers are in one-to-one correspondence with the N second optical transceivers . The first optical switch group 207 may be controlled between the first optical coupler 201 and the second optical switch group 208 when the first controller determines that the M first optical transceivers fail. establish an optical path between them, and send fourth indication information to the second controller. The fourth indication information is received by the second controller. When the second controller determines that the second optical fiber, the fourth optical fiber, and the third optical communication device are not faulty, the second controller controls the second optical switch group An optical path is established between the first optical fiber and the fourth optical fiber, so that the M second optical transceivers among the N second optical transceivers corresponding to the M first optical transceivers to replace the M first optical transceivers that have failed to transmit corresponding signal light.

With reference to the second aspect, in a feasible implementation manner, the fourth indication information includes at least first identification information corresponding to the M first optical transceivers and faults corresponding to the M first optical transceivers. state information, the fault state information is used to indicate a fault state, and the first controller is also connected to the second optical communication device. The fourth indication information may be sent to the second optical communication device through the first controller, so as to inform the second optical communication device that the M first optical transceivers have failed.

With reference to the second aspect, in a feasible implementation manner, the second controller is further connected to the third optical communication device. The first handover completion indication information from the third optical communication device may be received by the second controller. Wherein, the first handover completion indication information is determined by the third optical communication device when the M second optical transceivers start to replace the M first optical transceivers to carry out the corresponding first branch signal light Generated and sent after transmission, the first switching completion indication information includes at least second identification information corresponding to the M second optical transceivers and fault-free status information corresponding to the M second optical transceivers, so The no-fault status information described above is used to indicate a no-fault status. forwarding the first switching completion indication information to the first controller and/or the second optical communication device through the second control information.

With reference to the second aspect, in a feasible implementation manner, the optical communication system further includes a fourth optical communication device, a fifth optical communication device, a sixth optical communication device, a fifth optical fiber, a sixth optical fiber, and a seventh optical fiber and the eighth optical fiber, the dual-homing protection device further includes a fifth optical coupler, a sixth optical coupler, a seventh optical coupler and an eighth optical coupler. The fourth optical communication device is connected to the fifth optical coupler through the fifth optical fiber, the fourth optical communication device is also connected to the sixth optical coupler through the sixth optical fiber, and the fifth optical coupler is also connected to the first controller and the The first optical switch group is connected, the sixth optical coupler is also connected to the second controller and the second optical switch group, the fifth optical communication device is connected to the seventh optical coupler through the seventh optical fiber, and the sixth optical coupler is connected to the second optical switch group. The communication device is connected to the eighth optical coupler through the eighth optical fiber, and the first optical switch group is connected to the second optical switch group through the ninth optical fiber.

With reference to the second aspect, in a feasible implementation manner, after the first controller and the second controller determine that the first optical fiber is faulty and the third optical fiber and the second optical communication device are not faulty, And after controlling the first optical switch group and the second optical switch group to establish the first optical path between the second optical coupler and the third optical coupler, when the first controller according to the When the sub-signal light provided by the fifth optical coupler determines that the fifth optical fiber is faulty and the seventh optical fiber and the fifth optical communication device are not faulty according to the sub-signal light provided by the seventh optical coupler , sending fifth indication information to the second controller. Use the second controller for the fifth indication information, and control the second optical switch when it is determined that the second optical fiber, the fourth optical fiber, and the third optical communication device are not faulty establishing a second optical path between the second optical coupler and the fourth optical coupler, so as to complete the second optical communication through the third optical communication device instead of the second optical communication device transmission of signal light between the device and the first optical communication device.

With reference to the second aspect, in a feasible implementation manner, when the second switching completion indication from the third optical communication device is received by the first controller and the second controller, the The first controller and the second controller control the first optical switch group and the second optical switch group to disconnect the first optical path. Wherein, the second switching completion indication information is generated and sent by the third optical communication device after it is determined to completely replace the second optical communication device.

With reference to the second aspect, in a feasible implementation manner, after the first optical path is disconnected, the first optical switch group may be controlled by the first controller to switch between the seventh optical coupler and the An optical path is established between the second optical switch groups, and sixth indication information is sent to the second controller. The second controller may receive the sixth indication information, and when it is determined that the seventh optical fiber is not faulty, control the second optical switch group to switch between the sixth optical coupler and the second optical fiber. An optical path is established between an optical switch group, so that an optical path is established between the fourth optical communication device and the fifth optical communication device through the sixth optical fiber and the eighth optical fiber.

In a third aspect, the embodiment of the present application provides a dual-homing protection device. The dual-homing protection device is connected to the first optical communication device through the first optical fiber and the second optical fiber, the dual-homing protection device is connected to the second optical communication device through the third optical fiber, and the dual-homing protection device is connected to the first optical communication device through the fourth optical fiber. Three-light communication device. The dual-homing protection device is configured to, when it is detected that one or more of the first optical fiber, the third optical fiber, and the second optical communication device are faulty, between the first optical fiber and the fourth optical fiber between the optical fibers, or between the second optical fiber and the third optical fiber or the fourth optical fiber, so that the signal light travels between the first optical communication device and the second optical communication device or the between the third optical communication devices.

With reference to the third aspect, in a feasible implementation manner, the dual-homing protection device includes: a first optical coupler, a second optical coupler, a third optical coupler, a fourth optical coupler, a first optical switch group, a second optical switch group, a first controller, and a second controller, the first optical coupler is respectively connected to the first controller and the first optical switch group, and the first controller also respectively connected to the first optical switch group and the third optical coupler, the first optical switch group is also connected to the second optical switch group, and the second optical switch group is also connected to the The second optocoupler, the second controller and the fourth optocoupler are connected, and the second controller is also connected to the second optocoupler and the fourth optocoupler respectively , the first controller is connected with the second controller, the first optical coupler is connected with the first optical communication device through the first optical fiber, and the second optical coupler is connected through the The second optical fiber is connected to the first optical communication device, the third optical coupler is connected to the second optical communication device through the third optical fiber, and the fourth optical coupler is connected to the second optical communication device through the first Four optical fibers are connected to the third optical communication device.

With reference to the third aspect, in a feasible implementation manner, the first optical coupler is used to split the first signal light transmitted to the dual-homing protection device through the first optical fiber to obtain the first sub-signal light and the second sub-signal light The sub-signal light transmits the first sub-signal light to the first controller, and transmits the second sub-signal light to the first optical switch group. The first controller is configured to determine that the first optical fiber is faulty when it is determined that the optical power of the first sub-signal light is zero.

With reference to the third aspect, in a feasible implementation manner, the third optical coupler is used to split the second signal light transmitted to the dual-homing protection device through the third optical fiber to obtain the third sub-signal light and the fourth sub-signal light. The signal light transmits the third sub-signal light to the first controller, and transmits the fourth sub-signal light to the first optical switch group. The first controller is configured to determine that the optical power of the first sub-signal light is zero, or determine that the first optical power difference between the optical power of the first sub-signal light and the first preset optical power is equal to Or when the difference is greater than the first preset difference, it is determined that the third optical fiber is faulty.

With reference to the third aspect, in a feasible implementation manner, the first controller is further configured to, when determining that the first optical power difference is smaller than the first preset difference, determine the third sub- Whether the signal light includes a target top adjustment signal, where the target top adjustment signal is a top adjustment signal preconfigured by the second signal light. The first control is further configured to determine that the second optical communication device fails if it is determined that the third sub-signal light does not contain the target top signal.

With reference to the third aspect, in a feasible implementation manner, the second optical coupler is used to split the third signal light transmitted to the dual-homing protection device through the second optical fiber to obtain the fifth sub-signal light and the sixth sub-signal light. The signal light transmits the fifth sub-signal light to the second controller, and transmits the sixth sub-signal light to the second optical switch group. The fourth optical coupler is used to split the fourth signal light transmitted to the dual-homing protection device through the fourth optical fiber to obtain the seventh sub-signal light and the eighth sub-signal light, and transmit the seventh sub-signal light to the the second controller, and transmit the eighth sub-signal light to the second optical switch group. The second controller is used for determining whether the second optical fiber fails according to the fifth sub-signal light. The second controller is also used to determine whether the fourth optical fiber fails according to the seventh sub-signal light.

With reference to the third aspect, in a feasible implementation manner, the first controller is configured to control the The first optical switch group establishes an optical path between the second optical switch group and the third optical coupler, and sends first indication information to the second controller. The second controller is configured to receive the first indication information, and control the second optical switch group to connect between the second optical coupler and the first optical fiber when it is determined that the second optical fiber is not faulty. An optical path is established between the switch groups.

With reference to the third aspect, in a feasible implementation manner, the first controller is configured to send a third indication to the second controller when it is determined that the first optical fiber, the third optical fiber, and the second optical communication device all fail. information. The second controller is configured to receive the third indication information, and control the second optical switch group to establish an optical path between the second optical coupler and the fourth optical coupler under the condition that neither the second optical fiber nor the fourth optical fiber is faulty. .

With reference to the third aspect, in a feasible implementation manner, the second optical communication device includes a first multiplexer/demultiplexer, N first branch optical fibers, and N first optical transceivers, wherein each An optical transceiver is connected to the third optical fiber through a branch optical fiber and the first multiplexer/demultiplexer. N is a positive integer greater than or equal to 2. The N first optical transceivers are used to generate N first branch signal lights, and respectively transmit the N first branch signal lights to the first combination through the N first branch optical fibers. Splitter. Wherein, each first branch signal light in the N first branch signal lights is pre-configured with a first branch top-tuning signal, and the first multiplexer/demultiplexer is used for the N first branch signal lights Combine the signal lights of two channels to obtain the first signal light, and transmit the first signal light to the third optical coupler through the third optical fiber. The first controller is further configured to determine whether the first sub-signal lights include the N first branch signal lights when it is determined that the first optical power difference is smaller than the first preset difference Each of the first branch signal light corresponds to the first branch top adjustment signal. If the first controller determines that the first sub-signal light does not include the first branch top adjustment signal preconfigured by the M first branch signal lights in the N first branch signal lights, then determine The M first optical transceivers used to generate the M first branch signal lights fail. Wherein, M is a positive integer greater than or equal to 1.

With reference to the third aspect, in a feasible implementation manner, the third optical communication device includes a second multiplexer/demultiplexer, N second branch optical fibers, and N second optical transceivers, and each second optical The transceiver is connected to the fourth optical fiber through a second branch optical fiber and the second multiplexer/demultiplexer, and the N first optical transceivers are in one-to-one correspondence with the N second optical transceivers . The first controller is configured to send fourth indication information to the second controller when it is determined that the M first optical transceivers fail. The second controller is configured to receive the fourth indication information, and control the second optical switch group when it is determined that the second optical fiber, the fourth optical fiber, and the third optical communication device are not faulty. Establishing an optical path between the second optical fiber and the fourth optical fiber to pass through the M second optical transceivers corresponding to the M first optical transceivers among the N second optical transceivers to replace the failed M first optical transceivers to transmit corresponding first branch signal light.

With reference to the third aspect, in a feasible implementation manner, the optical communication system further includes a fourth optical communication device, a fifth optical communication device, a sixth optical communication device, a fifth optical fiber, a sixth optical fiber, and a seventh optical fiber and the eighth optical fiber, the dual-homing protection device further includes a fifth optical coupler, a sixth optical coupler, a seventh optical coupler and an eighth optical coupler. The fourth optical communication device is connected to the fifth optical coupler through the fifth optical fiber, the fourth optical communication device is also connected to the sixth optical coupler through the sixth optical fiber, and the fifth optical coupler is also respectively connected to the first control The device is connected with the first optical switch group, the sixth optical coupler is also connected with the second controller and the second optical switch group, and the fifth optical communication device is connected with the seventh optical coupler through the seventh optical fiber , the sixth optical communication device is connected to the eighth optical coupler through the eighth optical fiber, and the first optical switch group is connected to the second optical switch group through the ninth optical fiber.

With reference to the third aspect, in a feasible implementation manner, the first controller is configured to: combining the second controller to control the first optical switch group and the second optical switch group to establish a first optical path between the second optical coupler and the third optical coupler, wherein the the first optical path passes through the ninth optical fiber;

The first controller is further configured to determine that the fifth optical fiber is faulty according to the sub-signal light provided by the fifth optical coupler and determine that the seventh optical fiber is faulty according to the sub-signal light provided by the seventh optical coupler. When the optical fiber and the fifth optical communication device have no failure, send fifth indication information to the second controller;

The second controller is configured to receive the fifth indication information, and control the second optical switch group when it is determined that the second optical fiber, the fourth optical fiber, and the third optical communication device are not faulty. Establishing a second optical path between the second optical coupler and the fourth optical coupler to complete the second optical communication device through the third optical communication device instead of the second optical communication device transmission of signal light with the first optical communication device;

After both the first controller and the second controller receive the second switching completion indication, the first controller in conjunction with the second controller controls the first optical switch group and the second optical switch group to disconnect the first optical path, Wherein, the second handover completion indication information is generated and sent by the third optical communication device after it is determined to completely replace the second optical communication device.

With reference to the third aspect, in a feasible implementation manner, after the first optical path is disconnected, the first controller is further configured to control the first optical switch group to switch between the seventh optical coupler An optical path is established with the second optical switch group, and sixth indication information is sent to the second controller. The second controller is configured to receive the sixth indication information, and control the second optical switch group to switch between the sixth optical coupler and the first optical fiber when it is determined that the seventh optical fiber is not faulty. An optical path is established between the switch groups, so that an optical path is established between the fourth optical communication device and the fifth optical communication device through the sixth optical fiber, the seventh optical fiber, and the eighth optical fiber.

In a fourth aspect, the embodiment of the present application provides a communication system. The communication system includes a first communication device, the optical communication system according to any one of the first aspect, and a second communication device. The first communication device establishes a communication connection with the second communication device through the optical communication system. The optical communication system is used for the transmission of service data between the first communication device and the second communication device.

With reference to the fourth aspect, in a feasible implementation manner, the first communication device is a terminal device, the second communication device is a backhaul device, and the first optical communication device in the optical communication system includes an active The antenna unit AAU or remote radio unit RRU, the second optical communication device and the third optical communication device in the optical communication system include a baseband processing unit BBU or a distributed unit DU.

With reference to the fourth aspect, in a feasible implementation manner, the first communication device is a terminal device, the second communication device is a public cloud device, and the first optical communication device in the optical communication system is a customer front The configuration equipment CPE, the second optical communication device and the third optical communication device are cloud access point POP devices.

The solutions provided by the above second aspect to the fourth aspect are used to implement or cooperate to realize the optical communication system provided by the above first aspect, so they can achieve the same or corresponding beneficial effects as those of the first aspect, and will not be repeated here.

In summary, the optical communication system and dual-homing protection method provided by the present application can enable the fronthaul network or dedicated line network to realize dual-homing protection for the backbone optical fiber and the central office equipment, and can improve the reliability of the fronthaul network or dedicated line network.

Description of drawings

FIG. 1 is a schematic diagram of a first structure of an optical communication system provided by an embodiment of the present application;

Fig. 2 is a second structural schematic diagram of an optical communication system provided by an embodiment of the present application;

Fig. 3 is a schematic diagram of the first structure of a dual-homing protection device provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of a third structure of an optical communication system provided by an embodiment of the present application;

Fig. 5 is a fourth structural schematic diagram of an optical communication system provided by an embodiment of the present application;

Fig. 6 is a second structural schematic diagram of a dual-homing protection device provided by an embodiment of the present application;

Fig. 7 is a schematic flow chart of a dual-homing protection method provided by an embodiment of the present application;

Fig. 8 is a schematic structural diagram of a communication system provided by an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings provided in the embodiments of the present application.

The existing fronthaul network or dedicated line network can only realize single-homing protection for the backbone optical fiber between the remote equipment and the central office equipment, and cannot implement redundant protection for the side of the central office equipment. Once a failure occurs on the side of the central office equipment, all services between the remote equipment and the central office equipment will be interrupted. Therefore, the reliability of the existing fronthaul network or dedicated line network is poor.

Therefore, the technical problem to be solved in this application is: how to realize the dual-homing protection for the backbone optical fiber and the central office equipment in the fronthaul network or the dedicated line network, so as to improve the reliability of the fronthaul network or the dedicated line network.

FIG. 1 is a schematic diagram of a first structure of an optical communication system provided by an embodiment of the present application. As shown in Figure 1, the optical communication system 100 includes a first optical communication device 10, a dual-homing protection device 20, a second optical communication device 30, a third optical communication device 40, a first optical fiber 101, a second optical fiber 102, a first Three optical fibers 103 and a fourth optical fiber 104 . Wherein, the first optical communication device 10 is connected to the dual-homing protection device 20 through a first optical fiber 101 and a second optical fiber 102 . The dual-homing protection device 20 is connected to the second optical communication device 30 through the third optical fiber 103 . The dual-homing protection device 20 is also connected to the third optical communication device 40 through a fourth optical fiber.

It should be noted that the first optical communication device 10 , the second optical communication device 30 , and the third optical communication device 40 provided in the embodiment of the present application all have an optical transceiver function. That is, the first optical communication device 10 , the second optical communication device 30 , and the third optical communication device 40 can receive signal light while transmitting signal light. Therefore, signal light can be bidirectionally transmitted between the first optical communication device 10 and the second optical communication device 30 or the third optical communication device 40 .

It should also be noted that the first optical fiber 101 and the second optical fiber 102 are mutually active and standby, the third optical fiber 103 and the fourth optical fiber 104 are mutually active and standby, and the second optical communication device 30 and the third optical communication device 40 are also mutually active and standby. master and backup. That is to say, the first optical fiber 101, the dual-homing protection device 20, and the third optical fiber 103 construct the main path for optical signal transmission between the first communication device 10 and the second optical communication device 30, while the second optical fiber 102, the dual-homing protection device The device 20 and the fourth optical fiber 104 construct a backup path for optical signal transmission between the first optical communication device 10 and the third optical communication device 40 . In actual use, the optical communication system 100 will preferentially use the main channel to transmit signal light.

During signal light transmission in the optical communication system 100 , the dual-homing protection device 20 may be used to detect whether one or more of the first optical fiber 101 , the third optical fiber 103 , and the second optical communication device 30 are faulty. Moreover, when it is determined that one or more of the first optical fiber 101, the third optical fiber 103, and the second optical communication device 30 is faulty, the dual-homing protection device 20 may be between the first optical fiber 101 and the fourth optical fiber 104. , or, an optical path is established between the second optical fiber 102 and the third optical fiber 103 or the fourth optical fiber 104, so as to realize the signal between the first optical communication device 10 and the second optical communication device 30 or the third optical communication device 40 transmission of light.

In the above implementation, as long as the dual-homing protection device 20 detects that one or more of the first optical fiber 101, the third optical fiber 103, and the second optical communication device 30 is faulty, it can send the faulty optical fiber or optical communication device Switch to its spare part, thereby realizing dual-homing protection for the first optical fiber 101 and the second optical communication device 30 . Therefore, applying the optical communication system to the fronthaul network or private line network can realize dual-homing protection for the backbone optical fiber and the central office equipment in the fronthaul network or private line network, which can improve the reliability of the fronthaul network or private line network.

Further, FIG. 2 is a second structural schematic diagram of an optical communication system provided by an embodiment of the present application. FIG. 2 further shows an optional specific structure of the above-mentioned dual-homing protection device 20 . As shown in FIG. 2, the dual-homing protection device 20 includes a first optocoupler 201, a second optocoupler 202, a third optocoupler 203, a fourth optocoupler 204, a first controller 205, a second controller 206 . The first optical switch group 207 and the second optical switch group 208 . Wherein, the first optical coupler 201 is connected to the first controller 205 and the first optical switch group 207 respectively. The first controller 205 is also connected to the first optical switch group 207 and the third optical coupler 203 respectively. The first optical switch group 207 is also connected to the second optical switch group 208 through an optical fiber. The second optical switch group 208 is also connected to the second optical coupler 202 , the second controller 206 and the fourth optical coupler 204 respectively. The second controller 206 is also connected to the second optical coupler 202 and the fourth optical coupler 204 respectively. The first controller 205 is connected to the second controller 206 . The first optical coupler 201 is connected to the first optical communication device 10 through the first optical fiber 101, the second optical coupler 202 is connected to the first optical communication device 10 through the second optical fiber 102, and the third optical coupler 203 is connected to the first optical communication device 10 through the third optical fiber. 103 is connected to the second optical communication device 30 , and the fourth optical coupler 204 is connected to the third optical communication device 40 through the fourth optical fiber 104 .

It should be noted that the optical couplers provided in the embodiment of the present application (such as the first optical coupler 201, the second optical coupler 202, etc. as mentioned above) all support bidirectional optical transmission, and they can realize optical switching , and can realize the spectroscopic function. For example, the above-mentioned first optical coupler 201 can split the light from the first optical fiber 101, and transmit the split two beams of light to the first controller 205 and the first optical switch group 207 respectively, which can also The light from the first optical switch group 207 is directly transferred to the first optical fiber 101 . The functions of other optocouplers are similar and will not be repeated here.

It should also be noted that the optical switch group provided in the embodiment of the present application can be composed of one or more optical switches, which can implement control signals between different optical interfaces based on the control signal provided by the controller (such as the first controller 205). on or off. For example, the first optical switch group 207 includes a first optical interface connected to the first optical coupler 201, a second optical interface connected to the first optical switch group 208, and a third optical interface connected to the third optical coupler 203 . The first optical switch group 207 may implement switching on or off between any two optical interfaces among the above-mentioned first to third optical interfaces based on the switch control signal provided by the first controller 205 . The function of the second optical switch group 208 is similar, and will not be repeated here.

Next, in order to facilitate the subsequent description of the functions of the components in the optical communication system 100, it is now assumed that the actual working scenario of the optical communication system 100 is to send the first service data to the second optical communication device 30 through the first optical communication device 10, and The second service data is sent to the first optical communication device 10 through the second optical communication device 30 .

In actual application, the second optical communication device 30 can first generate a signal light based on the second service data (for the convenience of distinction, the description will be replaced by the first signal light below), and then pass the first signal light through the third optical fiber 103 The light is transmitted to the third optical coupler 203 . And because the relationship between the third optical communication device 40 and the fourth optical fiber 104 and the second optical communication device 30 and the third optical fiber 103 are active and standby, so the above-mentioned third optical communication device 40 will also generate signals based on the second service data synchronously light (in order to facilitate the distinction, the description will be replaced by the third signal light below), and transmit the third signal light to the fourth optical coupler 204 through the fourth optical fiber 104 . At the same time, the first optical communication device 10 may generate the source signal light based on the first service data, and split the source signal light to obtain the second signal light and the fourth signal light. Then, the first optical communication device 10 can transmit the above-mentioned fourth signal light to the first optical coupler 201 through the first optical fiber 101, and transmit the above-mentioned second signal light to the second optical coupler 202 through the second optical fiber 102 place.

Further, after receiving the fourth signal light, the first optical coupler 201 can split the fourth signal light to obtain the seventh sub-signal light and the eighth sub-signal light, and transmit them to the first controller 205 and the second sub-signal light respectively. An optical switch group 207. It should be noted here that the optical power of the seventh sub-signal light should be smaller than the optical power of the eighth sub-signal light. Similarly, after receiving the above-mentioned second signal light, the second optical coupler 202 can split the second signal light to obtain the third sub-signal light and the fourth sub-signal light, and separate the third sub-signal light and the fourth sub-signal light The sub signal light is transmitted to the second controller 206 and the second optical switch group 208 . Here, the optical power of the third sub-signal light should also be smaller than the optical power of the fourth sub-signal light. Similarly, after receiving the above-mentioned first signal light, the third optical coupler 203 can also split the first signal light to obtain the first sub-signal light and the second sub-signal light, and respectively use the first sub-signal light and the second sub-signal light are sent to the first controller 205 and the second optical switch group 208 . Similarly, after receiving the above-mentioned third signal light, the fourth optical coupler 204 can split the third signal light to obtain the fifth sub-signal light and the sixth sub-signal light, and respectively split the fifth sub-signal light and the sixth sub-signal light The sub signal light is transmitted to the second controller 206 and the second optical switch group 208 .

In a feasible implementation manner, the first controller 205 may determine whether the first optical fiber 101 is faulty according to the seventh sub-signal light provided by the first optical coupler 201 . For example, the above-mentioned first controller 205 may detect whether the optical power of the seventh sub-signal light from the first optical coupler 201 is zero. Here, the first controller 205 may detect whether the optical power of the seventh sub-signal light is zero through a photodetector included therein. When the first controller 205 detects that the optical power of the seventh sub-signal light is zero (that is, the seventh sub-signal light has no light), it can determine that the first optical fiber 101 is faulty. When the first controller 205 detects that the optical power of the seventh sub-signal light is not zero (that is, the seventh sub-signal light has light), it can determine that the first optical fiber 101 is not faulty. For another example, the first controller 205 may also detect whether the second optical power difference between the optical power of the seventh sub-signal light from the first optical coupler 201 and the second preset optical power is equal to or greater than the second preset optical power. difference. When the first controller 205 determines that the second optical power difference is equal to or greater than the second preset difference, it may determine that the first optical fiber 101 is faulty. When the first controller 205 determines that the second optical power difference is smaller than the second preset difference, it can determine that the first optical fiber 101 is not faulty.

In the above implementation, the first controller 205 judges whether the first optical fiber 101 is faulty through optical power detection, which is simple and easy to implement, and can reduce the structural complexity and cost of the dual-homing protection device 20 .

Similarly, the above-mentioned second controller 206 can also judge whether the second optical fiber 102 is faulty according to the third sub-signal light provided by the second optical coupler 202 . For example, the second controller 206 can detect whether the optical power of the third sub-signal light from the second optical coupler 202 is zero. When the second controller 206 detects that the optical power of the third sub-signal light is zero, it may determine that the second optical fiber 102 is faulty. When the second controller 206 detects that the optical power of the third sub-signal light is not zero, it may determine that the second optical fiber 102 is not faulty. For another example, the second controller 206 may also detect whether the third optical power difference between the optical power of the third sub-signal light from the second optical coupler 202 and the second preset optical power is equal to or greater than the second preset optical power. difference. When the first controller 205 determines that the third optical power difference is equal to or greater than the second preset difference, it may determine that the second optical fiber 102 is faulty. When the second controller 206 determines that the third optical power difference is smaller than the second preset difference, it can determine that the second optical fiber 102 is not faulty.

In the above implementation, the second controller 206 also judges whether the second optical fiber 102 is faulty through optical power detection, which can further reduce the structural complexity and cost of the dual-homing protection device 20 .

In a possible implementation manner, the first controller 205 also judges whether the third optical fiber 103 and/or the second optical communication device 30 fails according to the first sub-signal light provided by the third optical coupler 203 . Specifically, the first controller 205 may first detect whether the optical power of the first sub-signal light provided by the second optical coupler 202 is zero, or determine whether the optical power of the first sub-signal light is equal to that of the first preset light Whether the first optical power difference of the power is equal to or greater than the first preset difference. If the first controller 205 determines that the optical power of the first sub-signal light is zero, or determines that the first optical power difference between the optical power of the first sub-signal light and the first preset optical power is equal to or greater than the first If a preset difference is reached, it can be determined that the third optical fiber 103 is faulty. If the first controller 205 determines that the first optical power difference is smaller than the first preset difference, it may determine that the third optical fiber 103 is not faulty. In the case where the first controller 205 determines that the third optical fiber 103 is not faulty, the first controller 205 may further determine whether the above-mentioned first sub-signal light contains the target top adjustment signal. Specifically, the first controller 205 may perform IM demodulation on the first sub-signal light through the IM demodulation module contained therein to obtain corresponding IM demodulation results. Then, the first controller 205 may determine whether the target pitch signal is contained in the pitch demodulation result. If the first controller 205 determines that the target pitch modulation and demodulation result does not contain the target pitch modulation and demodulation signal, it determines that the target pitch modulation and demodulation signal is not contained in the first sub-signal light. If the first controller 205 determines that the pitch tuning demodulation result includes the target pitch tuning signal, it may determine that the target pitch tuning signal is included in the first sub-signal light. When the first controller 205 determines that the target pitch signal is not included in the first sub-signal light, it can be determined that the target pitch signal is not included in the first signal light generated by the second optical communication device 30, so that the second sub-signal light can be determined. The second optical communication device 30 fails. When the first controller 205 determines that the first sub-signal light contains the target pitch signal, it can determine that the first signal light contains the target pitch signal, and then it can determine that the second optical communication device 30 is not faulty.

It should be noted that the target top adjustment signal is the top adjustment signal preconfigured by the first signal light. That is to say, in this implementation mode, in the process of generating the above-mentioned first signal light, the second optical communication device 30 will load a low-frequency target top adjustment on the service signal light generated based on the second service data through the top adjustment technology. signal, and then generate the first signal light that is actually transmitted. It should be understood that the target tuning signal will not interfere with the optical transmission of the service signal, and it can carry a lightweight operation administration and maintenance (OAM) message, which is used for optical link diagnosis and optical module maintenance. Power, temperature or circuit alarm functions.

In the above implementation, the first controller 205 judges whether the third optical fiber 103 has a fault by detecting the optical power, and further detects whether the first sub-signal light contains the target modulation The IR signal is used to judge whether the second optical communication device 30 is faulty, so that the fault detection for the third optical fiber 103 and the pure optical layer of the second optical communication device 30 can be realized.

Similarly, the second controller 206 can also determine whether the fourth optical fiber 104 and/or the third optical communication device 40 is faulty according to the fifth sub-signal light provided by the fourth optical coupler 204 . Specifically, the second controller 206 may first detect whether the optical power of the fifth sub-signal light provided by the fourth optical coupler 204 is zero, or determine whether the optical power of the fifth sub-signal light is equal to that of the first preset light Whether the fourth optical power difference of power is equal to or greater than the first preset difference. If the second controller 206 determines that the optical power of the fifth sub-signal light is zero, or determines that the fourth optical power difference is equal to or greater than the first preset difference, it may determine that the fourth optical fiber 104 is faulty. If the second controller 206 determines that the fourth optical power difference is smaller than the first preset difference, it may determine that the fourth optical fiber 104 is not faulty. In the case where the second controller 206 determines that the fourth optical fiber 104 is not faulty, the second controller 206 may further determine whether the fifth sub-signal light contains the aforementioned target top adjustment signal. It should be noted here that, similarly, in the process of generating the above-mentioned third signal light, the third optical communication device 40 will also load a low-frequency target top adjustment on the service signal light generated based on the second service data through the top adjustment technology. signal, and then generate the third signal light that is actually transmitted. Here, the specific process for the second controller 206 to detect whether the fifth sub-signal light contains the target top-adjustment signal can also refer to the above-mentioned first controller 205 detecting whether the first sub-signal light contains the target top-adjustment signal. The process will not be repeated here. When the second controller 206 determines that the target pitch signal is not included in the fifth sub-signal light, it can be determined that the target pitch signal is not included in the third signal light generated by the third optical communication device 40, so that the third The optical communication device 40 fails. When the second controller 206 determines that the fifth sub-signal light contains the target pitch signal, it can determine that the third signal light contains the target pitch signal, and then it can determine that the third optical communication device 40 is not faulty.

In the above implementation, the second controller 206 also judges whether the fourth optical fiber 104 is faulty by detecting the optical power, and further detects whether the fifth sub-signal light contains a target when it is determined that the fourth optical fiber 104 is not faulty. Adjust the top signal to judge whether the third optical communication device 40 fails, so that the fault detection for the pure optical layer of the fourth optical fiber 104 and the third optical communication device 40 can be realized, and the structure complexity of the dual-homing protection device 20 can be further reduced degree and cost.

The foregoing describes the process in which the dual-homing protection device 20 detects whether the first optical fiber 101 , the second optical fiber 102 , the third optical fiber 103 , the fourth optical fiber 104 , the second optical communication device 30 and the third optical communication device 40 are faulty. The following will further illustrate the processing procedure of the dual-homing protection device 20 when it is determined that one or more of the above-mentioned detection objects are faulty in combination with the foregoing description.

Fig. 3 is a schematic diagram of a first structure of a dual-homing protection device provided by an embodiment of the present application. As shown in FIG. 3 , the first optical switch group 207 may include a first optical switch 2071 , and the second optical switch group 208 may include a second optical switch 2081 . Both the first optical switch 2071 and the second optical switch 2081 are 1*2 optical switches, and the first optical switch 2071 has a first optical interface, a second optical interface, a third optical interface and a first electrical interface. The second optical switch 2081 has a fourth optical interface, a fifth optical interface, a sixth optical interface, and a second electrical interface. Wherein, the first optical interface of the first optical switch 2071 is connected to the first optical coupler 201, the second optical interface is connected to the third optical coupler 203, and the third optical interface is connected to the sixth optical interface of the second optical switch 2081. The optical interface is connected through the fifth optical fiber 105 , and its first electrical interface is connected with the first controller 205 . In practical applications, the first controller 205 can send a switch control signal to the first optical switch 2071 through the above-mentioned first electrical interface to control the conduction between the third optical interface and the second optical interface or the first optical interface. or shut down. The fourth optical interface of the second optical switch 2081 is connected to the second optical coupler 202 , the fifth optical interface is connected to the fourth optical coupler 204 , and the second electrical interface is connected to the second controller 206 . In practical applications, the second controller 206 can send a switch control signal to the second optical switch 2081 through the second electrical interface to control the conduction between the sixth optical interface and the fourth optical interface or the fifth optical interface or off. Therefore, it can be understood here that through the cooperative control of the first controller 205 and the second controller 206, the connection between the first optical coupler 201 and the third optical coupler 203 or the fourth optical coupler 204 can be realized. The establishment and release of the optical path, and the establishment or release of the optical path between the second optical coupler 202 and the third optical coupler 203 or the fourth optical coupler 204 . For example, when the first controller 205 controls the first optical switch 2071 to turn on its first optical interface and third optical interface, at the same time the second controller 206 controls the second optical switch 2081 to turn on its fifth optical interface and sixth optical interface. The interface realizes the establishment of the optical path between the first optical coupler 201 and the fourth optical coupler 204 . And when the first controller 205 controls the first optical switch 2071 to disconnect its first optical interface and third optical interface, at the same time the second controller 206 controls the second optical switch 2081 to disconnect its fifth optical interface and sixth optical interface , then the release of the optical path between the first optical coupler 201 and the fourth optical coupler 204 can be realized.

In an optional implementation, when the first controller 205 determines that the first optical fiber 101 is faulty and the third optical fiber 103 and the second optical communication device 30 are not faulty, the first controller 205 can control the first The optical switch group 207 establishes an optical path between the second optical switch group and the third optical coupler 203 . Specifically, the first controller 205 may send a first switch control signal to the first optical switch 2071 . After the first optical switch 2071 receives the above-mentioned first switch control signal, it can conduct the second optical interface and the third optical interface, so that between the third optical coupler 203 and the sixth optical interface of the second optical switch 2081 Create a light path between them. At the same time, the above-mentioned first controller 205 may also generate a first indication information, and send the first indication information to the second controller 206 . Here, the first indication information is mainly used to indicate that the first optical fiber 101 is faulty and the third optical fiber 103 and the second optical communication device 30 are not faulty.

Then, when the second controller 206 receives the above-mentioned first indication information, if the second controller 206 determines that the second optical fiber 102 is not faulty, it can control the second optical switch group 208 to switch between the second optical coupler 202 and the first optical fiber 102. Optical paths are established between the optical switch groups 207 . Specifically, the second controller 206 sends a second switch control signal to the second optical switch 2081 . After receiving the second switch control signal, the second optical switch 2081 can turn on its sixth optical interface and fourth optical interface, thereby establishing an optical path between its sixth optical interface and the second optical coupler 202 . So far, the second optical coupler 202 establishes an optical path through the second optical switch 2081 , the fifth optical fiber 105 , the first optical switch 2071 and the third optical coupler 203 . Then, the fourth sub-signal light can be transmitted to the second optical communication device 30 through the second optical switch 2081, the fifth optical fiber 105, the first optical switch 2071, the third optical coupler 203 and the third optical fiber 103, thereby realizing Transmission of the first service data from the first optical communication device 10 to the second optical communication device 30 . At the same time, the second sub-signal light can also be transmitted to the first optical communication device 10 through the third optical coupler 203, the first optical switch 2071, the fifth optical fiber 105, the second optical switch 2081 and the second optical fiber 102, thereby realizing Transmission of the second service data from the second optical communication device 30 to the first optical communication device 10 . It can also be understood here that the second optical fiber 102 starts to replace the failed first optical fiber 101 to realize the transmission of service data between the first optical communication device 10 and the second optical communication device 20, and the failed first optical fiber 101 Switchover to the spare second optical fiber 102 is complete.

Optionally, when the second controller 206 receives the first indication information, if the second controller 206 determines that the second optical fiber 102 also fails, the second controller 206 may output service interruption warning information. Here, the service interruption warning information may be used to indicate that service interruption occurs between the first optical communication device 10 and the second optical communication device 30 and the third optical communication device 40 .

In the above implementation, when the dual-homing protection device 20 determines that the first optical fiber 101 is faulty and the third optical fiber 103 and the second optical communication device 30 are not faulty, the second optical fiber 102 can be used instead of the first optical fiber 101 for corresponding The transmission of service data, so that the optical communication system 100 can realize the fault protection for the first optical fiber 101.

In an optional implementation, when the first controller 205 determines that the first optical fiber 101 is not faulty and the third optical fiber 103 and/or the second optical communication device 30 is faulty, the first controller 205 may control The first optical switch group 207 establishes an optical path between the third optical coupler 203 and the second optical switch group 208 . The first controller 205 may also generate and send second indication information to the second controller 206 . Here, the second indication information may be used to indicate that the first optical fiber 101 is not faulty and the third optical fiber 103 and/or the second optical communication device 30 is faulty. When the second controller 206 receives the above-mentioned second instruction information, if the second controller 206 determines that the fourth optical fiber 104 and the third optical communication device 40 are not faulty, it can control the second optical switch group 208 to switch between the first optical switch An optical path is established between the group 207 and the fourth optical coupler 204 . In this way, the eighth sub-signal light split by the first optical coupler 201 can be transmitted to the third optical communication device 40 through the fourth optical fiber 104, and the sixth sub-signal light can be transmitted to the third optical communication device 40 through the first optical fiber 101. An optical communication device 10 .

Specifically, in combination with the structure shown in FIG. 3 , when the first controller 205 determines that the first optical fiber 101 is not faulty and the third optical fiber 103 and/or the second optical communication device 30 is faulty, the first controller 205 may generate and Send the third switch control signal to the first optical switch 2071 . After the first optical switch 2071 receives the above-mentioned third switch control signal, it can turn on its first optical interface and third optical interface, thereby establishing an optical path between the first optical coupler 201 and the second optical switch 2081 . At the same time, the first controller 205 may also generate a second indication information, and send the second indication information to the second controller 206 . After the second controller 206 receives the above-mentioned second instruction information and determines that the fourth optical fiber 104 and the third optical communication device 40 are not faulty, it can generate and send the fourth switch control signal to the second optical switch 2081 . After the second optical switch 2081 receives the above-mentioned fourth switch control signal, it can turn on its fifth optical interface and sixth optical interface, thereby establishing an optical path between the first optical switch 2071 and the fourth optical coupler 204 . So far, the first optical coupler 201 establishes an optical path through the second optical switch 2081 , the fifth optical fiber 105 , and the first optical switch 2071 and the fourth optical coupler 204 . Then, the eighth sub-signal light can be transmitted to the third optical communication device 40 through the first optical switch 2071, the fifth optical fiber 105, the second optical switch 2081, the fourth optical coupler 204, and the fourth optical fiber 104, thereby realizing Transmission of the first service data from the first optical communication device 10 to the third optical communication device 40 . At the same time, the sixth sub-signal light can also be transmitted to the first optical communication device 10 through the second optical switch 2081, the fifth optical fiber 105, the first optical switch 2071, the first optical coupler 201 and the first optical fiber 101, thereby realizing The above-mentioned transmission of the second service data from the third optical communication device 40 to the first optical communication device 10 . It can also be understood here that the fourth optical fiber 104 and the third optical communication device 40 start to replace the failed third optical fiber 103 and/or the second optical communication device 30 to realize the business data with the first optical communication device 10 transmission, the third optical fiber 103 and the second optical communication device 30 complete the switching to the spare third optical fiber 104 and the third optical communication device 40 .

Optionally, when the second controller 206 receives the above-mentioned second indication information, if the second controller 206 determines that the fourth optical fiber 104 and/or the third optical communication device 40 also fails, it may output the above-mentioned service interruption alarm information.

In the above implementation, when the dual-homing protection device 20 determines that the first optical fiber 101 is not faulty and the third optical fiber 103 and/or the second optical communication device 30 fails, it can pass through the spare fourth optical fiber 104 and the third optical communication device. 40 to replace the third optical fiber 103 and the second optical communication device 30 to transmit corresponding service data, so that the optical communication system can also implement fault protection for the third optical fiber and the second optical communication device.

In an optional implementation manner, when it is determined that both the first optical fiber 101 and the third optical fiber 103 are faulty, or it is determined that the above-mentioned first optical fiber 101, the third optical fiber 103 and the second optical communication device 30 are all faulty Next, the first controller 205 may generate and send third indication information to the second controller 206 . Here, the third indication information is used to indicate that both the first optical fiber 101 and the third optical fiber 103 fail, or that the first optical fiber 101 , the third optical fiber 103 and the second optical communication device 30 all fail. After the second controller 206 receives the above-mentioned third indication information, if it is determined that the second optical fiber 102, the fourth optical fiber 104, and the third optical communication device 40 are not faulty, it can control the second optical switch group 208 to operate on the second optical An optical path is established between the coupler 202 and the fourth optical coupler 204 . In this way, the fourth sub-signal light can be transmitted to the third optical communication device 40 through the fourth optical fiber 104, and the sixth sub-signal light can be transmitted to the first optical communication device 10 through the second optical fiber 102, ensuring the first service The data and the second service data are normally transmitted.

Specifically, in combination with the structure shown in FIG. 3 , after the second controller 206 receives the above-mentioned third indication information, if it is determined that the second optical fiber 102, the fourth optical fiber 104, and the third optical communication device 40 are all fault-free, then the Generate and send a fifth switch control signal to the second optical switch 2081 . After the second optical switch 2081 receives the above-mentioned fifth switch control signal, it can turn on its fourth optical interface and fifth optical interface, thereby establishing an optical connection between the second optical coupler 202 and the fourth optical coupler 204. path. So far, the second optical coupler 202 establishes an optical path through the second optical switch 2081 and the fourth optical coupler 204 . Then, the fourth sub-signal light can be transmitted to the third optical communication device 40 through the second optical switch 2081, the fourth optical coupler 204 and the fourth optical fiber 104, thereby realizing the transmission of the first service data from the first optical communication device 10 Transmission to the third optical communication device 40 . At the same time, the sixth sub-signal light can also be transmitted to the first optical communication device 10 through the second optical switch 2081, the second optical coupler 202 and the second optical fiber 102, thereby realizing the transmission of the second service data from the third optical communication device 40 Transmission to the first optical communication device 10 . It can also be understood here that at this moment, the second optical fiber 102, the fourth optical fiber 104 and the third optical communication device 40 start to replace the failed first optical fiber 101, the third optical fiber 103 and the second optical communication device 30 to realize communication with Transmission of business data between the first optical communication devices 10 .

In the above implementation, when the dual-homing protection device 20 determines that the first optical fiber 101 and the third optical fiber 103 and/or the second optical communication device 30 fail, it can pass through the spare second optical fiber 102, the third optical fiber 103 and the third The optical communication device 40 replaces the first optical fiber 101, the third optical fiber 103 and the second optical communication device 30 to transmit corresponding service data, thus realizing the dual-homing protection mechanism for the first optical fiber 101 in the optical communication system 100 1. Fault protection of the third optical fiber 103 and the second optical communication device 30 .

In the various implementations above, as long as any one or more of the first optical fiber 101, the third optical fiber 103, and the second optical communication device 30 fails, the dual-homing protection device 20 can take corresponding switching operations to pass The spare part replaces the failed object to transmit corresponding service data, which enables the optical communication system 100 to realize dual-homing protection for the transmission optical fiber and the optical communication device. Therefore, applying the optical communication system 100 to a fronthaul network or a dedicated line network can improve the reliability of the fronthaul network or the dedicated line network.

Further, in an optional implementation manner, when the first controller 205 determines that any one or more of the first optical fiber 101, the third optical fiber 103, and the second optical communication device 30 have recovered from the fault After that (that is, the first controller 205 detects that the faulty object has returned to normal again), the first controller 205 and the second controller 206 can coordinately control the first optical switch group 207 and the second optical switch group 208, The main path constructed by the first optical fiber 101, the dual-homing protection device 20, and the third optical fiber 103, and the backup path constructed by the second optical fiber 102, the dual-homing protection device 20, and the fourth optical fiber 104 are restored to the first optical fiber 101, The state when neither the third optical fiber 103 nor the second optical communication device 30 is faulty. The following takes the above-mentioned scenario where the first optical fiber 101 fails and the third optical fiber 103 and the second optical communication device 30 are not faulty as an example. After the first optical communication device 10 establishes an optical path through the second optical fiber 102, the second optical coupler 202, the second optical switch group 208, the first optical switch group 207, the third optical coupler 203, and the third optical fiber 103, The first controller 205 can continue to detect the status of the first optical fiber. When the first controller 205 detects that the first optical fiber 101 is fault-free again, the first controller 205 can re-establish the optical path between the first optical coupler 201 and the third optical coupler 203 . At the same time, the first controller 205 may also send a first state recovery message to the second controller 206 . Here, the first state recovery information is used to indicate that the first optical fiber 101 has eliminated the fault. After the second controller 206 receives the above-mentioned first state recovery information, it can re-establish the optical path between the second optical coupler 202 and the fourth optical coupler 204 . So far, both the main path and the backup path have recovered to the state when the first optical fiber 101 , the third optical fiber 103 and the second optical communication device 30 have no faults.

Here, after the dual-homing protection device 20 detects that the faulty object has returned to normal, it can automatically make the main path constructed by the first optical fiber 101, the dual-homing protection device 20, and the third optical fiber 103, and the second optical fiber 102, The backup path constructed by the dual-homing protection device 20 and the fourth optical fiber 104 is restored to the state when the first optical fiber 101, the third optical fiber 103 and the second optical communication device 30 are not faulty, which can improve the functional flexibility of the dual-homing protection device 20 sex.

In some feasible implementations, the first optical communication device 10, the second optical communication device 30, and the third optical communication device 40 may include multiple optical transceivers, and the multiple optical transceivers correspond to multiple light branch. For example, FIG. 4 is a schematic diagram of a third structure of an optical communication system provided by an embodiment of the present application. As shown in FIG. 4 , the above-mentioned first optical communication device 20 may specifically include N third optical transceivers, N third branch optical fibers, a third multiplexer/demultiplexer, and a ninth optical coupler. Wherein, a third optical transceiver in the N third optical transceivers is connected to a third multiplexer/demultiplexer through a third branch fiber in the N third branch fibers, and the third The multiplexer/demultiplexer is also connected with the ninth optical coupler. The ninth optical coupler is also connected to the first optical coupler 201 and the second optical coupler 202 through the first optical fiber 101 and the second optical fiber 102 respectively. Similarly, the above-mentioned second optical communication device 30 may specifically include N first optical transceivers, N first branch optical fibers, and a first multiplexer/demultiplexer. Wherein, one of the N first optical transceivers is connected to the first multiplexer/demultiplexer through one of the N first branch optical fibers, and the first The multiplexer/demultiplexer is also connected to the third optical coupler 203 through the third optical fiber 103 . The above-mentioned third optical communication device 40 may specifically include N second optical transceivers, N second branch optical fibers, and a second multiplexer/demultiplexer. Wherein, one of the N second optical transceivers is connected to the second multiplexer/demultiplexer through one of the N second branch optical fibers, and the second The multiplexer/demultiplexer is also connected to the fourth optical coupler 204 through the fourth optical fiber 104 .

In combination with the transmission scenario assumed above, the above-mentioned first service data may include N pieces of first sub-service data, and the above-mentioned second service data may include N pieces of second sub-service data. In an actual working process, the N third optical transceivers will generate N third branch signal lights based on the N first sub-service data. Here, a third optical transceiver generates a third branch signal light based on a first sub-service data, and each third branch signal light is preconfigured with a corresponding second branch top-tuning signal. Then, the above-mentioned N third branch signal lights are transmitted to the third multiplexer/demultiplexer through N third branch optical fibers. After receiving the above-mentioned N third branch signal lights, the third multiplexer/demultiplexer can combine the N third branch signal lights to obtain one combined signal light, and combine the combined The signal light is transmitted to the ninth optical coupler. Then, the ninth optical coupler can split the combined signal light to obtain the fourth signal light and the second signal light, and transmit the fourth signal light to the first optical coupler 201 through the first optical fiber 101 , transmit the second signal light to the second optical coupler 202 through the second optical fiber 102 . Similarly, the N first optical transceivers will generate N first branch signal lights based on the above N second sub-service data, and further transmit the N first branch signal lights through N first branch optical fibers transmitted to the first multiplexer/demultiplexer. Here, each first branch signal is pre-configured with a first branch top-tuning signal. After the first multiplexer/demultiplexer receives the above-mentioned N first branch signal lights, it can combine the N first branch signal lights to obtain the above-mentioned first signal light, and connect the third optical fiber 103 to The first signal light is transmitted to the third optical coupler 203 . At the same time, the above N second optical transceivers will also generate N second branch signal lights based on the above N second sub-service data, and further transmit the N second branch signal lights through N second branch optical fibers. The light is transmitted to the second multiplexer/demultiplexer. Here, each second branch signal light is also pre-configured with a first branch top-tuning signal. After the second multiplexer/demultiplexer receives the N second branch signal lights, it can combine the N second branch signal lights to obtain the above-mentioned third signal light, and transmit the third signal light to The fourth optical coupler 204 .

Further, the first controller 205 can determine whether the first optical fiber 101 is faulty according to the optical power of the seventh sub-signal light provided by the first optical coupler 201. The specific process can be referred to above, and will not be repeated here. The first controller 205 may first judge whether the third optical fiber 103 is faulty according to the optical power of the first sub-signal light provided by the third optical coupler 203 . In the case where the first controller 205 determines that the third optical fiber 103 is not faulty, the first controller 205 may further determine whether each first branch of the N first branch signal lights is included in the first sub-signal light The signal light corresponds to the top-tuning signal of the first branch. Here, the specific process for the first controller 205 to determine whether the first sub-signal light contains the first branch top-adjustment signal corresponding to each first branch signal light among the N first branch signal lights can refer to the above-described The process of the first controller 205 determining whether the first sub-signal light contains the target top adjustment signal will not be repeated here. When the first controller 205 determines that the first sub-signal light contains the first branch top adjustment signal corresponding to each first branch signal light, it can determine the N first sub-signal lights in the second optical communication device 30 None of the optical transceivers is faulty, and it is determined that the second optical communication device 30 is not faulty. When the first controller 205 determines that the first sub-signal lights do not contain the first branch signal lights corresponding to the M first sub-signal lights in the N first branch signal lights, it can be determined that the above-mentioned method for generating If the M first optical transceivers of the M first sub-signal lights fail, it can be determined that the second optical communication device 30 fails. Here, M is a positive integer greater than or equal to 1.

Similarly, the second controller 206 can determine whether the fourth optical fiber is faulty according to the optical power of the fifth sub-signal light provided by the fourth optical coupler 204. The specific process can be referred to above, and will not be repeated here. In the case that the second controller 206 determines that the fourth optical fiber 104 is not faulty, the second controller 206 may further determine whether the fifth sub-signal light includes each second branch of the N second branch signal lights The signal light corresponds to the top-tuning signal of the first branch. Here, the specific process for the second controller 206 to determine whether the fifth sub-signal light contains N first-branch top adjustment signals corresponding to N second-branch signal lights can be referred to the first controller 205 described above. The process of determining whether the first sub-signal light includes N first-branch top adjustment signals corresponding to the N first-branch signal lights will not be repeated here. When the second controller 206 determines that the fifth sub-signal light contains the first branch top adjustment signal corresponding to each second branch signal light, it can determine the N second sub-signal lights in the third optical communication device 40 None of the optical transceivers is faulty, and it is determined that the third optical communication device 40 is not faulty. When the second controller 206 determines that the fifth sub-signal light does not contain the first branch top adjustment signal corresponding to the P first branch signal lights among the N first branch signal lights, it can be determined to use Since the P second optical transceivers that generate the above P second branch signal lights fail, it can be determined that the third optical communication device 40 fails. Here, P is a positive integer greater than or equal to 1.

Further, the first controller 205 determines that none of the N first optical transceivers in the first optical fiber 101, the third optical fiber 103, and the second optical communication device 30 are faulty, and the second controller 206 determines that the second optical fiber 102 , the fourth optical fiber 104, and the N second optical transceivers in the third optical communication device 40 without failure, the eighth sub-signal light can pass through the first optical switch group 207, the third optical coupler 203, the The three optical fibers 103 reach the first multiplexer/demultiplexer. Then, the first multiplexer/demultiplexer can demultiplex the eighth sub-signal light to obtain N fourth branch signal lights corresponding to the above-mentioned N third branch signal lights. Here, each of the N fourth branch signal lights includes a first sub-service data, and is loaded with a pre-configured second branch top-tuning signal. Then, the first multiplexer/demultiplexer can respectively transmit the N fourth branch-by-branch signal lights to the N first optical transceivers through the above-mentioned N first branch optical fibers, and then complete the transfer of N first sub-service data from Optical transmission from the first optical communication device 10 to the second optical communication device 30 . And the third sub-signal light can pass through the second optical switch group 208 , the fourth optical coupler 204 , and the fourth optical fiber 104 to reach the second multiplexer/demultiplexer. Then, the second multiplexer/demultiplexer can demultiplex the third sub-signal light to obtain N fifth branch signal lights that are the same as the above-mentioned N fourth branch signal lights. Here, each fifth branch signal light among the Nth branch-free signal lights contains a first sub-service data, and is loaded with a pre-configured second branch top-tuning signal. Then, the second multiplexer/demultiplexer can respectively transmit the N fifth branch signal lights to the N second optical transceivers through the above-mentioned N second branch optical fibers, and then complete the transfer of the N first sub-service data from the first Optical transmission from one optical communication device 10 to a third optical communication device 40 .

At the same time, the above-mentioned second sub-signal light can be transmitted to the ninth optical coupler through the first optical switch group 207, the first optical coupler 201, and the first optical fiber 101, and the sixth sub-signal light can pass through the second optical switch group 208, The second optical coupler 202 and the second optical fiber 102 transmit to the ninth optical coupler. Then, the ninth optical coupler combines the second sub-signal light and the sixth sub-signal light, and transmits the combined signal light to the third optical combiner and demultiplexer. The third optical combiner and demultiplexer can perform beam splitting on the combined signal light to obtain N fifth branch signal lights. Here, each fifth branch signal light among the N fifth branch signal lights carries a second sub-service data, and is also loaded with a preconfigured first branch top-tuning signal. Then, the third multiplexer/demultiplexer can respectively transmit the N fifth branch signal lights to the N third optical transceivers through the N third branch optical fibers, thereby completing the transfer of N second sub-service data from the second Optical transmission from the optical communication device 30 and the third optical communication device 40 to the first optical communication device 20 .

When the first controller 205 determines that the first optical fiber 101 has no fault and the M first optical transceivers in the second optical communication device 30 fail, the first controller 205 can control the first optical switch group 207 to switch between the first optical An optical path is established between the coupler 201 and the second optical switch group 208 . The specific process can be referred to above, and will not be repeated here. At the same time, the first controller 205 may generate fourth indication information and send it to the second controller 206 . The fourth indication information is used to indicate that the above M first optical transceivers fail. After the second controller 206 receives the fourth indication information, if it is determined that the fourth optical fiber 104 and the N second optical transceivers in the third optical communication device 40 are not faulty, it can control the second optical switch group 208 to An optical path is established between the first optical switch group 207 and the fourth optical coupler 204 . So far, the first optical coupler 201 and the fourth optical coupler 204 establish an optical path through the first optical switch group 207 , the fifth optical fiber 105 and the second optical switch group 208 . Then, the eighth sub-signal light can be transmitted to the third optical communication device 40 through the first optical switch group 2071 , the fifth optical fiber 105 , the second optical switch group 208 , the fourth optical coupler 204 and the fourth optical fiber 104 . At the same time, the sixth sub-signal light can also be transmitted to the first optical communication device 10 through the second optical switch group 208 , the fifth optical fiber 105 , the first optical switch group 207 , the first optical coupler 201 and the first optical fiber 101 . In this way, the M second optical transceivers corresponding to the M first optical transceivers among the above-mentioned N second optical transceivers can be used to replace the failed M first optical transceivers for corresponding support. transmission of signal light. It should be understood that the transmission services carried by the M first optical transceivers that have failed will also be completely switched to the M second optical transceivers.

In the above implementation, when the M first optical transceivers in the second optical communication device 30 fail, the dual-homing protection device 20 can switch the transmission services carried by the failed M first optical transceivers to on the corresponding M second optical transceivers in the third optical communication device 40 . In this way, protection for one or more optical transceivers in the second optical communication device 30 can be realized, and the diversity of functions of the optical communication system 100 can be improved.

Optionally, the fourth indication information includes at least the first identification information corresponding to the M first optical transceivers and the fault status information corresponding to the M second optical transceivers, the fault status information is used to indicate the occurrence of The state of the fault. The first controller 205 is also connected to the second optical communication device 30 . After the first controller 205 generates the fourth indication information, it can also send the fourth indication information to the second optical communication device 30 to inform the second optical communication device 30 of the M first optical transceivers it contains malfunction.

Optionally, after the second controller 206 controls the second optical switch group 208 to establish an optical path between the first optical switch group 207 and the fourth optical coupler 204, the second controller 206 can also generate a branch Fault indication information. The branch failure indication information may include identification information of optical transceivers corresponding to the M first optical transceivers that have failed. Then, the second controller 206 may send the branch fault indication information to the third optical communication device 40 . After receiving the branch failure indication information, the third optical communication device 40 may turn off the second optical transceivers among the N second optical transceivers included in it except for the above M second optical transceivers. In this case, only the M second optical transceivers in the third optical communication device 40 are working normally, which can reduce the power consumption of the third optical communication device 40 .

Optionally, the second controller 206 is also connected to the third optical communication device 40 . After the third optical communication device 40 determines that the M second optical transceivers included in it have replaced the M first optical transceivers that have failed to transmit the corresponding branch signal light, the third optical communication device 40 can send The second controller sends second switching completion indication information. Wherein, the second switching completion indication information includes at least the second identification information corresponding to the M second optical transceivers and the fault-free status information corresponding to the M second optical transceivers. Here, the non-failure status information is used to indicate a non-failure state. The above-mentioned second switching completion indication information is used to indicate that the M second optical transceivers have replaced the faulty M first optical transceivers to transmit the corresponding branch signal light. Further, after receiving the second handover completion indication information, the second controller 206 may also forward the second handover completion indication information to the first controller 205 and/or the second optical communication device 30 to notify the second handover completion indication information to the first controller 205 and/or the second optical communication device 30 A corresponding branch switching of the controller 205 and/or the second optical communication device 30 has been completed.

Optionally, similar to the above, when the dual-homing protection device 20 re-detects that the M first optical transceivers that have failed have returned to normal, the dual-homing protection device 20 can also use the first controller 205 and The second controller 206 cooperatively controls the first optical switch group 207 and the second off switch group 208 to perform corresponding recovery operations, so that the optical path is re-established between the first optical coupler 201 and the third optical coupler 203, so that An optical path is re-established between the second optical coupler 202 and the fourth optical coupler 204 . In this way, the above M first optical transceivers can re-carry corresponding transmission services.

In the foregoing, the optical communication system 100 only includes the main path constructed by the first optical fiber 101, the dual-homing protection device 20, and the third optical fiber 103 (for the convenience of distinction, the description will be replaced by the first main path below), and, the first The backup path constructed by the second optical fiber 102, the dual-homing protection device 20, and the fourth optical fiber 104 (in order to facilitate the distinction, the first backup path will be used in the following description) is described. In practical applications, the optical communication system 100 It may also include a second main road and a corresponding second backup road other than the above-mentioned first main road and first backup road. The structure and functions of the optical communication system 100 will be described below by taking a scenario in which the optical communication system 100 includes the first main path, the second main path, the first backup path, and the second backup path as an example.

FIG. 5 is a schematic diagram of a fourth structure of an optical communication system provided by an embodiment of the present application. As shown in Figure 5, the optical communication system 100 also includes a fourth optical communication device 50, a fifth optical communication device 60, a sixth optical communication device 70, a fifth optical fiber 105, a sixth optical fiber 106, a seventh optical fiber 107 and a eight optical fibers 108 . The above-mentioned dual-homing protection device 20 further includes a fifth optical coupler 209 , a sixth optical coupler 210 , a seventh optical coupler 211 , an eighth optical coupler 212 and a ninth optical fiber 109 . Wherein, the fourth optical communication device 50 is connected to the fifth optical coupler 209 through the fifth optical fiber 105 , and the fifth optical coupler 209 is also connected to the first controller 205 and the first optical switch group 207 respectively. The fourth optical communication device 50 is connected to the sixth optical coupler 210 through the sixth optical fiber 106 , and the sixth optical coupler 210 is also connected to the second controller 206 and the second optical switch group 208 respectively. The fifth optical communication device 60 is connected to the seventh optical coupler 211 through the seventh optical fiber 107 , and the seventh optical coupler 211 is also connected to the first controller 205 and the first optical switch group 207 respectively. The sixth optical communication device 70 is connected to the eighth optical coupler 212 through the eighth optical fiber 108 , and the eighth optical coupler 212 is also connected to the second controller 206 and the second optical switch group 208 respectively. The first optical switch group 207 is connected to the second optical switch group 208 through the ninth optical fiber 109 .

It should be noted here that a second main path is established between the fourth optical communication device 50 and the fifth optical communication device 60 through the fifth optical fiber 105, the dual-homing protection device 20, and the seventh optical fiber 107, and the fourth optical A second backup path is established between the communication device 50 and the sixth optical communication device 70 through the sixth optical fiber 106 , the dual-homing protection device 20 and the sixth optical communication device 70 .

In order to facilitate the description of the functions of the optical communication system 100 shown in FIG. Send the second service data to the first optical communication device 10, the fourth optical communication device 50 sends the third service data to the fifth optical communication device 60, and the fifth optical communication device 60 sends the fourth service data to the fourth optical communication device 50 .

During actual operation, the above-mentioned fourth optical communication device 50 may generate the fifth signal light and the sixth signal light carrying the third service data. For the specific process, refer to the specific process of generating the second signal light and the fourth signal light by the first optical communication device 10 described above, and details will not be repeated here. Then, the fourth optical communication device 50 can transmit the fifth signal light to the fifth optical coupler 209 through the fifth optical fiber 105 , and can also transmit the sixth signal light to the sixth optical coupler 210 through the sixth optical fiber 106 . The function of the first optical coupler 201 described above is the same, after the fifth optical coupler 209 receives the above-mentioned fifth signal light, it can also split the fifth signal light into two beams of sub-signal light, and combine the two beams of sub-signal light. The signal light is transmitted to the first controller 205 and the first optical switch group 207 respectively. After receiving the above-mentioned sixth signal light, the sixth optical coupler 210 can also split the sixth signal light into two beams of sub-signal light, and transmit the two beams of sub-signal light to the second controller 206 and the second light beam respectively. switch group 208 .

The fifth optical communication device 60 may generate the seventh signal light carrying the fourth service data, and transmit the seventh signal light to the seventh optical coupler 211 through the seventh optical fiber 107 . At the same time, the sixth optical communication device 70 can generate the eighth signal light carrying the fourth service data, and transmit the eighth signal light to the eighth optical coupler 212 through the eighth optical fiber 108 . The function of the first optical coupler 201 described above is the same, after the seventh optical coupler 211 receives the seventh signal light, it can also split the seventh signal light into two beams of sub-signal lights, and combine the two beams of sub-signal lights The light is transmitted to the first controller 205 and the first optical switch group 207 respectively. After receiving the above-mentioned eighth signal light, the eighth optical coupler 212 can also split the eighth signal light into two beams of sub-signal light, and transmit the two beams of sub-signal light to the second controller 206 and the second light beam respectively. switch group 208 .

Further, the first controller 205 can determine whether the fifth optical fiber is faulty according to the sub-signal light provided by the fifth optical coupler 209 . The specific process is the same as the process described above in which the first controller 205 determines whether the seventh optical fiber 107 is faulty according to the seventh sub-signal light, and will not be repeated here. The first controller 205 can also judge whether the above-mentioned seventh optical fiber 107 and the fifth optical communication device 60 are faulty according to the sub-signal light from the seventh optical coupler 211. The specific process is the same as that of the first controller 205 described above. The process of judging whether the third optical fiber 103 and the second optical communication device 30 are faulty by the first sub-signal light is the same, and will not be repeated here.

Similarly, the second controller 206 can judge whether the sixth optical fiber is faulty according to the sub-signal light provided by the sixth optical coupler 210. The specific process is the same as that described above. The process of whether the optical fiber 102 fails is the same, and will not be repeated here. The second controller 206 can also judge whether the above-mentioned eighth optical fiber 108 and the sixth optical communication device 70 are faulty according to the sub-signal light from the eighth optical coupler 212. The specific process is the same as that of the second controller 206 described above. The process of judging whether the fourth optical fiber 104 and the third optical communication device 40 are faulty by the fifth sub-signal light is the same, and will not be repeated here.

From the content described above and the structure shown in Figure 5, it can be understood that the switching between the first main road and the first backup road and the switching between the second main road and the second backup road need to rely on the dual-homing protection device 20, that is to say, the dual-homing protection device 20 is shared. However, the first optical switch group 207 and the second optical switch group 208 in the dual-homing protection device 20 are only connected through the ninth optical fiber 109, and at the same time, the ninth optical fiber 109 can only support the switching between one main path and the backup path . Therefore, when the first main circuit and the second main circuit fail at the same time, the dual-homing protection device 20 needs a new mechanism to avoid failure protection for multiple main circuits at the same time due to the occupation of the ninth optical fiber 109 The problem.

Fig. 6 is a schematic diagram of a second structure of a dual-homing protection device provided by an embodiment of the present application. As shown in FIG. 6 , the first optical switch group 207 may specifically include a third optical switch 2072 , a fourth optical switch 2073 , and a fifth optical switch 2074 . The second optical switch group 208 may specifically include a sixth optical switch 2082 , a seventh optical switch 2083 , and an eighth optical switch 2084 . Wherein, the third optical switch 2072 is respectively connected with the first controller 205 , the first optical coupler 201 , the third optical coupler 203 and the fifth optical switch 2074 . The fourth optical switch 2073 is respectively connected to the first controller 205 , the fifth optical coupler 209 , the seventh optical coupler 211 and the fifth optical switch 2074 . The seventh optical switch 2083 is connected to the second controller 206 , the second optical coupler 202 , the fourth optical coupler 204 and the sixth optical switch 2082 respectively. The eighth optical switch 2084 is respectively connected to the second controller 206 , the sixth optical coupler 210 , the eighth optical coupler 212 and the sixth optical switch 2082 . The sixth optical switch 2082 is also connected to the second controller 206 , and the fifth optical switch 2074 is also connected to the first controller 205 . The fifth optical switch 2074 is connected to the sixth optical switch 2082 through the ninth optical fiber 109 .

In an actual working process, the first controller 205 can control the fourth optical switch 2073 to establish an optical path between any two of the fifth optical coupler 209 , the seventh optical coupler 211 , and the fifth optical switch 2074 . The first controller 205 can also control the third optical switch 2072 to establish an optical path between any two items of the first optical coupler 201 , the third optical coupler 203 , and the fifth optical switch 2074 . The first controller 205 may also control the fifth optical switch 2074 to establish an optical path between the fourth optical switch 2073 and the ninth optical fiber, or between the third optical switch 2072 and the ninth optical fiber. Similarly, the second controller 206 can control the seventh optical switch 2083 to establish an optical path between any two of the second optical coupler 202 , the fourth optical coupler 204 , and the sixth optical switch 2082 . The second controller 206 can also control the eighth optical switch 2084 to establish an optical path between any two of the sixth optical coupler 210 , the eighth optical coupler 212 , and the sixth optical switch 2082 . The second controller 206 may also control the sixth optical switch 2082 to establish an optical path between the seventh optical switch 2083 and the ninth optical fiber, or between the eighth optical switch 2084 and the ninth optical fiber.

In an optional implementation, in combination with the foregoing functional descriptions of the components in the optical communication system 100, the first controller 205 detects that the first optical fiber 101 fails and the third optical fiber 103 and the second optical communication device 30 In the case of no failure, the first controller 205 can combine with the second controller 206 to control the first optical switch group 207 and the second optical switch group 208 between the second optical coupler 202 and the third optical coupler 203 An optical path is established between them (for the sake of description, the description will be replaced by the first optical path below). Here, the first optical path passes through the ninth optical fiber 109 .

Specifically, in combination with the structure shown in FIG. 6 , the first controller 205 can control the third optical switch 2072 to establish an optical path between the third optical coupler 203 and the fifth optical switch 2074, and simultaneously control the fifth optical switch 2074 to An optical path is established between the third optical switch 2072 and the ninth optical fiber, so that an optical path can be established between the third optical coupler 203 and the ninth optical fiber. At the same time, the first controller 205 may also generate first indication information, and send the first indication information to the second controller 206 . Here, the first indication information is used to indicate that the first optical fiber 101 is faulty and the third optical fiber 103 and the second optical communication device 30 are not faulty.

Optionally, in the case that the optical communication system includes multiple primary paths and multiple backup paths, the above-mentioned first indication information may specifically include the first primary path identification information used to indicate the first primary path and the first primary path identification information used to indicate the fault. Fault indication information at the place of occurrence. The foregoing first main road identification information may specifically include equipment identifications or board identifications of the first optical communication apparatus 10 and the second optical communication apparatus 30 . The above fault indication information specifically includes fault point indication information and fault state indication information. The failure point indication information includes at least three values, which are respectively assumed to be the first value, the second value and the third value here. The fault point indication information under the first value is used to indicate the line optical fiber in the main road (such as the first optical fiber in the first main road), and the fault point indication information under the second value is used to indicate the branch fiber in the main road. optical fiber or the central office equipment (such as the third optical fiber and the second optical communication device in the first main road), the fault point indication information under the third value is used to indicate the line optical fiber, the branch optical fiber and the central office equipment. The above fault state indication information may include at least two values, which are assumed to be the fourth value and the fifth value here. The fault state indication information under the fourth value is used to indicate the occurrence of a fault, and the fault state indication information under the fifth value is used to indicate no fault.

Taking the above-mentioned first indication information as an example below, Table 1-1 is a kind of first indication information provided in this embodiment of the present application. As described in Table 1-1, the first indication information includes the equipment identifiers of the first optical communication device 10 and the second optical communication device 30, the fault point indication information is the third value, and the fault state indication information is the sixth value. value, it indicates that the first optical fiber 101 in the first main path has a fault.

Table 1-1

Identification information of the first main road Point of failure indication Fault status indication information Equipment identification of the first optical communication device 10 and the second optical communication device 30 first value Fourth value

It should be understood here that during actual use, the indication information sent by the first controller 205 to the second controller 206 may also be implemented in other forms, which is not specifically limited in this application.

Further, the second controller 206 may control the seventh optical switch 2083 to establish an optical path between the second optical coupler 202 and the sixth optical switch 2082 after determining that the first instruction information is received, and at the same time control the seventh optical switch 2083 to The six optical switches 2082 establish an optical path between the seventh optical switch 2083 and the ninth optical fiber 109 , so that an optical path can also be established between the second optical coupler 202 and the ninth optical fiber 109 . So far, the above-mentioned first optical path has been established between the third optical coupler 203 and the second optical coupler 202, and the first optical communication device 10 can pass through the second optical fiber 102, the dual-homing protection device 20 and the third optical fiber 103 The first service data is sent to the second optical communication device 30 , and the second service data sent by the second optical communication device 30 can also be received through the second optical fiber 102 , the dual-homing protection device 20 and the third optical fiber 103 .

Optionally, after the second controller 206 completes the establishment of the optical path between the second optical coupler 202 and the ninth optical fiber 109, it may also generate and send to the first controller 205 a first instruction for the above-mentioned first instruction information. Response message. The first response information is used to indicate that the second controller 206 has controlled the second optical fiber 102 to replace the failed first optical fiber 101 to transmit corresponding signal light. Here, the above-mentioned first response information may include first backup path identification information corresponding to the second backup path, fault replacement point information for indicating a specific backup object, and fault status information of the fault replacement point. The fault replacement point information includes at least three values, which are respectively assumed to be the eighth value, the ninth value, and the tenth value here. The fault replacement point information under the eighth value is used to indicate the line optical fiber in the backup route (such as the second fiber in the first backup route), and the fault replacement point information under the ninth value is used to indicate the branch fiber in the backup route. optical fiber or the central office equipment (such as the fourth optical fiber and the third optical communication device in the first backup line), the fault replacement point information under the tenth value is used to indicate the line optical fiber, the branch optical fiber and the central office equipment. The above fault state indication information is the same as the fault state indication information included in the first indication information described above. The fault state indication information under the fourth value is used to indicate the occurrence of a fault, and the fault state indication information under the fifth value is used to indicate no fault.

At the same time, when the first controller 205 determines that the fifth optical fiber 105 also fails according to the sub-signal light provided by the fifth optical coupler 209, and determines that the seventh optical fiber 107 and the fifth optical fiber 107 are connected according to the sub-signal light provided by the seventh optical coupler 211 When the optical communication device 60 has no failure, the first controller 205 may generate and send fifth indication information to the second controller 206 . Here, the fifth indication information is used to indicate that the first optical fiber 101 and the fifth optical fiber 105 are faulty, and the seventh optical fiber 107 , the fifth optical communication device 60 , the third optical fiber 103 and the second optical communication device 30 are not faulty. After receiving the fifth indication information, the second controller 206 controls the second optical switch group 208 to operate on the second A new optical path is established between the optical coupler 202 and the fourth optical coupler 204 (for convenience of distinction, the description will be replaced by the second optical path below). In specific implementation, in combination with the structure shown in FIG. 7 , the second controller 206 can control the seventh optical switch 2083 to establish an and at the same time control the seventh optical switch 2083 to establish an optical path between the second optical coupler 202 and the fourth optical coupler 204, so that the second optical coupler 202 and the ninth optical fiber 109 can also Create a light path. In this way, the optical communication system 100 can make the third optical communication device 40 replace the second optical communication device 30 based on the above-mentioned second optical path, so as to continue the signal between the second optical communication device 30 and the first optical communication device 10 transmission of light.

Optionally, after the second controller 206 establishes the second optical path, the second controller 206 may also generate and send to the first controller first response information for the first indication information, the first response information It is mainly used to instruct the third optical communication device in the first backup path and replace the second optical communication device 30 to transmit corresponding signal light.

Further, after the third optical communication device 40 determines that it has completely replaced the second optical communication device 30 , it may generate and send first switching completion indication information to the first controller 205 and the second controller 206 . After both the first controller 205 and the second controller 206 receive the above-mentioned first switching completion indication information, the first controller 205 can control the first optical switch group 207 and the second optical switch group 207 in combination with the second controller 206. The switch group 208 disconnects the above-mentioned first optical path. After the first optical path is disconnected, the ninth optical fiber 109 is unoccupied.

Specifically, in combination with the structure shown in FIG. 6 above, the first controller 205 can control the third optical switch 2072 and the fifth optical switch 2074 to disconnect the optical connection, and the second controller 206 can control the sixth optical switch The optical connection of the seventh optical switch 2083 can completely disconnect the optical connection between the seventh optical switch 2083 and the third optical switch 2072 to achieve the effect of releasing the occupation of the ninth optical fiber 109 .

Here, after the third optical communication device 40 determines that it has completely replaced the second optical communication device 30, it can notify the first controller 205 and the second controller 206 through the first switching completion indication information, so that the first controller 205 and the second controller 206 can further control the switching of the failed second primary path to the second backup path in a timely manner, which can improve the timeliness of fault protection.

Further, after the first controller 205 cooperates with the second controller 206 to disconnect the above-mentioned first optical path, the first controller 205 can also control the first optical switch group 207 to switch between the seventh optical coupler 211 and the first optical switch. An optical path is established between groups 207 . Specifically, in combination with the structure shown in FIG. 6, the first controller 205 can control the fourth optical switch 2073 to establish an optical connection between the seventh optical coupler 211 and the fifth optical switch 2074, and the first controller 205 can also control The fifth optical switch 2074 establishes an optical connection between the ninth optical fiber 109 and the fourth optical switch 2073 , so that the optical path from the seventh optical coupler 211 to the ninth optical fiber 109 can be realized. At the same time, the first controller 205 may also send sixth indication information to the second controller 206 . Here, the sixth indication information is used to indicate that an optical connection has been established between the ninth optical fiber 109 and the fourth optical switch 2073 . The above-mentioned second controller 206 can control the second optical switch group 208 to connect the sixth optical coupler 210 and the first optical switch group when it is determined that the seventh optical fiber 107 is not faulty after receiving the above-mentioned sixth indication information. 207 to establish an optical path. Specifically, in combination with the structure described in FIG. 7, the second controller 206 can control the eighth optical switch 2084 to establish an optical connection between the sixth optical switch 2082 and the sixth optical coupler 210, and the second controller 206 can also control The sixth optical switch 2082 establishes an optical connection between the ninth optical fiber 109 and the eighth optical switch 2084 , so that the seventh optical coupler 211 and the sixth optical coupler 210 can establish an optical connection. So far, an optical path can be established between the fourth optical communication device 50 and the fifth optical communication device 60 through the sixth optical fiber 106, the seventh optical fiber 107 and the ninth optical fiber 109. The fourth optical communication device 50 and the fifth optical communication device 60 can realize the transmission of the above-mentioned third service data and fourth service data through the optical path.

In the above implementation, when the optical communication system 100 includes a plurality of main paths and backup paths, and these multiple main paths and backup paths share the dual-homing protection device 20, the dual-homing protection device 20 can complete switching of the first main path to its corresponding first backup path to release the occupied shared ninth optical fiber 109, and then further control the subsequent failure of the second main path to switch to the second backup path, so that The practicality of the optical communication system 100 can be further improved by effectively solving the problem that the ninth optical fiber 109 cannot provide fault protection for multiple main paths at the same time due to the occupation of the ninth optical fiber 109 .

What needs to be supplemented here is that, in combination with the architecture of the optical communication system 100 described in FIG. 1 or FIG. 2 above, in the specific scenario of fronthaul, especially in the scenario of 4G Or a device with multiple RRUs can be regarded as a remote device in the 4G fronthaul network. The above-mentioned second optical communication device 30 and third optical communication device 40 are devices including one or more BBUs, and can be regarded as central office equipment in a 4G fronthaul network. The first optical fiber 101 and the second optical fiber 102 can be regarded as two main optical fibers for main use and backup. In the scenario of 5G fronthaul, the above-mentioned first optical communication device 20 is a device including one or more AAUs, which can be regarded as a remote device in the 5G fronthaul network. The above-mentioned second optical communication device 30 and third optical communication device 40 are devices including one or more DUs, which can be regarded as central office equipment in a 5G fronthaul network.

In the scenario of a dedicated line, the above-mentioned first optical communication device 10 is a CPE device, which can be regarded as a remote device in a dedicated line network. The above-mentioned second optical communication device 30 and third optical communication device 40 can be different cloud access point POP devices, which can be regarded as central office devices in a dedicated line network.

In addition, it is combined with the architecture of the optical communication system 100 shown in FIG. 5 above. In the scenario of fronthaul, especially in the scenario of 4G fronthaul, the above-mentioned first optical communication device 10 and fourth optical communication device 50 are devices including one or more RRUs, and they can be regarded as remote components in the fronthaul network. end device. The above-mentioned second optical communication device 30, third optical communication device 40, fifth optical communication device 60, and sixth optical communication device 70 are devices that include one or more BBUs, and they can be regarded as central office equipment in the fronthaul network . In the scenario of 5G fronthaul, the above-mentioned first optical communication device 10 and fourth optical communication device 50 are devices including one or more AAUs, and they can be regarded as remote devices in the fronthaul network. The above-mentioned second optical communication device 30, third optical communication device 40, fifth optical communication device 60, and sixth optical communication device 70 are devices that include one or more DUs, and they can be regarded as central office equipment in the fronthaul network .

In the dedicated line network scenario, the first optical communication device 10 and the fourth optical communication device 50 are CPE equipment, which can be regarded as remote equipment in the dedicated line network. The second optical communication device 30 and the third optical communication device 30 The device 40, the fifth optical communication device 60, and the sixth optical communication device 70 can be different cloud access point POP devices, which can be regarded as central office devices in a dedicated line network.

Since the structure of the optical communication system 100 and the specific process of realizing the dual-homing protection function are as described above, no matter in the dedicated line network or the fronthaul network, so in order to avoid redundancy, the two specific details of the dedicated line network or the fronthaul network will not be combined here. The structure of the optical communication system 100 and the specific process of realizing the dual-homing protection function are described repeatedly.

The embodiment of the present application also provides a dual-homing protection method applicable to the optical communication system 100 described above. Specifically, the dual-homing protection method can be implemented cooperatively by various functional components in the optical communication system 100 . It should be noted here that the following description of the dual-homing protection method will be based on the optical communication system 100 described above, and the connection relationship and functions of the various functional components involved can be referred to the corresponding description above. , which will not be repeated here.

FIG. 7 is a schematic flowchart of a dual-homing protection method provided by an embodiment of the present application. As shown in Fig. 7, the dual-homing protection method includes the following steps.

S701. Detect whether a fault occurs in the first optical fiber, the third optical fiber, and the second optical communication device through the dual-homing protection device.

In some feasible implementation manners, in the optical communication system 100, the first service data is sent to the second optical communication device 30 through the first optical communication device 10, and the second service data is sent to the first optical communication device through the second optical communication device 30. During the process of service data, the optical communication system 100 can detect whether the first optical fiber 101 , the third optical fiber 103 and the second optical communication device 30 are faulty through the dual-homing protection device 20 .

In a specific implementation, in the case where the structure of the optical communication system 100 is shown in FIG. 3 , the optical communication system 100 can generate the second signal light and the fourth signal light carrying the first service data through the first optical communication device 10, And transmit the fourth signal light to the dual-homing protection device 20 through the first optical fiber 101 , and transmit the second signal light to the dual-homing protection device 20 through the second optical fiber 102 . At the same time, the optical communication system 100 can also generate the first signal light carrying the second service data through the second optical communication device 30 , and transmit the first signal light to the dual-homing protection device 20 through the third optical fiber 103 . The optical communication system 100 may also generate third signal light carrying the second service data through the third optical communication device 40 , and transmit the third signal light to the dual-homing protection device 20 through the third optical fiber 103 .

Optionally, the optical communication system 100 can use the first controller 205 in the dual-homing protection device 20 to determine whether the above-mentioned first optical fiber 101 is faulty according to the optical power of the seventh sub-signal light provided by the first optical coupler 201 . If it is determined by the first controller 205 that the optical power of the seventh sub-signal light is zero, or it is determined that the second optical power difference between the optical power of the seventh sub-signal light and the second preset optical power is equal to or When the difference is greater than the second preset difference, it is determined that the first optical fiber 101 is faulty. If it is determined by the first controller 205 that the second optical power difference is smaller than the second preset difference, it can be determined that the first optical fiber 101 is not faulty. Here, the specific process of judging whether the first optical fiber 101 is faulty according to the optical power of the seventh sub-signal light by the first controller 205 can refer to the corresponding description in Embodiment 1, which will not be repeated here.

Similarly, the optical communication system 100 can also use the second controller 206 to determine whether the second optical fiber 102 is faulty according to the optical power of the third sub-signal light provided by the second optical coupler 202 . For the specific process, refer to the corresponding description in Embodiment 1, and details will not be repeated here.

Optionally, the optical communication system 100 may also use the first controller 205 to determine whether the third optical fiber fails according to the optical power of the first sub-signal light provided by the third optical coupler 203 . If it is determined by the first controller 205 that the optical power of the first sub-signal light is zero, or it is determined that the first optical power difference between the optical power of the first sub-signal light and the first preset optical power is equal to or When the difference is greater than the first preset difference, it is determined that the third optical fiber 103 is faulty. If it is determined by the first controller 205 that the first optical power difference is smaller than the first preset difference, it can be determined that the third optical fiber 103 is not faulty. Here, the optical communication system 100 uses the first controller 205 to determine whether the third optical fiber is faulty according to the optical power of the first sub-signal light. The specific process can refer to the corresponding description in the first embodiment above, and will not be repeated here. .

Further, when the optical communication system 100 determines through the first controller 205 that the third optical fiber 103 is not faulty (that is, it is determined that the optical power of the first sub-signal light is not zero), it can further pass the first controller 205 to determine whether the first sub-signal light contains the target top adjustment signal. Here, the target top adjustment signal is the top adjustment signal preconfigured by the first signal light. If it is determined by the first controller 205 that the first sub-signal light does not include the target pitch signal, the optical communication system 100 may determine that the second optical communication device is faulty. If it is determined by the first controller 205 that the first sub-signal light contains the target pitch signal, the optical communication system 100 may determine that the second optical communication device is not faulty. Here, the specific process of judging whether there is a fault in the second optical communication device 30 by the first controller 205 according to whether the first sub-signal light contains the target top-adjustment signal can refer to the corresponding description in the first embodiment above, and will not be repeated here. repeat.

Similarly, the optical communication system 100 can also use the second controller 206 to determine whether the fourth optical fiber 104 and the third optical communication device 40 fail according to the sixth sub-signal light provided by the fourth optical coupler 204 . For the specific process, reference may be made to the corresponding description in the first embodiment above, and details will not be repeated here.

Optionally, in the optical communication system as shown in FIG. 5 , when the first controller 205 determines that the third optical fiber 103 is not faulty, the first controller 205 may be further used to determine whether the first sub-signal light contains N first branch signal lights are pre-configured branch signal lights. If it is determined by the first controller 205 that the first sub-signal light does not contain the branch top-adjustment signal preconfigured by the M first branch signal lights of the N first branch signal lights, it can be determined to generate The M first optical transceivers of the M first branch signal lights fail. Here, the optical communication system 100 uses the first controller 205 to determine whether M first optical transceivers out of the N first optical transceivers of the second optical communication device 30 fail according to the first sub-signal light. Reference may be made to the corresponding description of Embodiment 1, which will not be repeated here.

Similarly, in the case where the structure of the optical communication system 100 is shown in FIG. 5 , the optical communication system 100 can also use the second controller 206 to determine the N second Whether P second optical transceivers among the optical transceivers fail. For the specific process, please refer to the corresponding description in Embodiment 1, and will not repeat them here

S702. If it is determined that one or more of the first optical fiber, the third optical fiber, and the second optical communication device are faulty, use the dual-homing protection device to switch between the first optical fiber and the fourth optical fiber, or, between the second optical fiber An optical path is established with the third optical fiber or the fourth optical fiber.

In some feasible implementations, if the optical communication system 100 determines that one or more of the first optical fiber 101, the third optical fiber 103, and the second optical communication device 30 is faulty through the dual-homing protection device 20, it can further pass The dual-homing protection device 20 establishes an optical path between the first optical fiber 101 and the fourth optical fiber 104, or between the second optical fiber 102 and the third optical fiber 103 or the fourth optical fiber 104, so that signal light Transmission between the optical communication device 10 and the second optical communication device 30 or the third optical communication device 40 .

In a feasible implementation, in the case where the structure of the optical communication system 100 is as shown in FIG. The second optical communication device 30 has no failure, then the first optical switch group 207 can be controlled by the first controller 205 to establish an optical path between the second optical switch group 208 and the third optical coupler 203, and the 206 Send first indication information. Here, the first indication information is used to indicate that the first optical fiber 101 is faulty and the third optical fiber 103 and the second optical communication device 30 are not faulty. Then, after receiving the first instruction information through the second controller 206, if the second controller 206 determines that the second optical fiber 102 is not faulty, the second controller 206 can control the second optical switch group 208 to operate on the second An optical path is established between the optical coupler 202 and the first optical switch group 207 . In this way, the establishment of an optical path between the second optical fiber 102 and the third optical fiber 103 can be realized, so that the first optical communication device 10 and the second optical communication device 30 can transmit signals through the second optical fiber 102 and the third optical fiber 103 transmission of light. Here, the specific process for the optical communication system 100 to establish an optical path between the second optical fiber 102 and the third optical fiber 103 through the dual-homing protection device 20 can refer to the corresponding description in the first embodiment above, and will not be repeated here.

In yet another optional implementation manner, in the case where the structure of the optical communication system 100 is as shown in FIG. If the second optical communication device 30 fails, the optical communication system 100 can control the first optical switch group 207 through the first controller 205 to establish an optical path between the first optical coupler 201 and the second optical switch group 208, and send The second controller 206 sends second indication information. If the second instruction information is received by the second controller 206, and it is determined by the second controller 206 that the fourth optical fiber 104 and the third optical communication device 40 are not faulty, the optical communication system 100 can control the second optical fiber 104 by the second controller 206. The second optical switch group 208 establishes an optical path between the first optical switch group 207 and the fourth optical coupler 204 . In this way, the establishment of an optical path between the first optical fiber 101 and the fourth optical fiber 104 can be realized, so that the first optical communication device 10 and the third optical communication device 40 can transmit signals through the first optical fiber 101 and the fourth optical fiber 104 transmission of light. Here, the specific process of establishing an optical path between the first optical fiber 101 and the fourth optical fiber 104 through the dual-homing protection device 20 can refer to the corresponding description of the first embodiment above, and will not be repeated here.

In yet another optional implementation manner, in the case where the structure of the optical communication system 100 is shown in FIG. When the optical fiber 101 , the third optical fiber 103 and the second optical communication device 30 all fail, the optical communication system 100 may send third indication information to the second controller through the first controller 205 . If the optical communication system 100 receives the third indication information through the second controller 206, and the second controller 206 determines that the second optical fiber 102, the fourth optical fiber 104 and the third optical communication device 40 are all fault-free, then the The second controller 206 controls the second optical switch group 208 to establish an optical path between the second optical coupler 202 and the fourth optical coupler 204 . In this way, the establishment of an optical path between the second optical fiber 102 and the fourth optical fiber 104 can be realized, so that the first optical communication device 10 and the third optical communication device 40 can transmit signals through the second optical fiber 102 and the fourth optical fiber 104 transmission of light. Here, the specific process for the optical communication system 100 to establish an optical path between the second optical fiber 102 and the fourth optical fiber 104 through the dual-homing protection device 20 can refer to the corresponding description in the first embodiment above, and will not be repeated here.

Here, when it is determined by the first controller 205 that the first optical fiber 101 is faulty, if it is determined by the second controller 206 that the second optical fiber 102 is faulty, the optical communication system 100 can output the service through the second controller 206 Interrupt warning message. Here, the service interruption warning information is mainly used to indicate that service interruption occurs between the first optical communication device 10 and the second optical communication device 30 and the third optical communication device 40 .

In yet another optional implementation, in the case where the structure of the optical communication system 100 is shown in FIG. 5 , if the first controller 205 determines the M first optical transceivers in the second optical communication device If the device fails, the first optical switch group 207 can be controlled by the first controller to establish an optical path between the first optical coupler 201 and the second optical switch group 208, and the first controller 205 can send the optical path to the second The controller 206 sends fourth indication information. If the fourth indication information is received by the second controller 206, and it is determined by the second controller 206 that the fourth optical fiber 104 and the third optical communication device 40 are not faulty, the second controller 206 can be used to control the fourth optical fiber 104 and the third optical communication device 40. The second optical switch group 208 establishes an optical path between the first optical switch group 207 and the fourth optical coupler 204 . In this way, an optical path can be established between the first optical communication device 10 and the third optical communication device 40 through the first optical fiber 101, and the N second optical transceivers corresponding to the M first optical transceivers can The M second optical transceivers can replace the failed M first optical transceivers to transmit corresponding first branch signal light. Here, the specific process of establishing an optical path between the first optical fiber 101 and the fourth optical fiber 104 by the optical communication system 100 through the dual-homing protection device 20 can refer to the corresponding description in the first embodiment above, and will not be repeated here.

Optionally, the fourth indication information includes at least first identification information corresponding to the M first optical transceivers and fault status information corresponding to the M first optical transceivers, and the fault status information is used for Indicates a failed state. After the above fourth instruction information is generated by the first controller 205, the fourth instruction information may be sent to the second optical communication device 30 by the first controller 205, so as to inform the second optical communication device 30 of the The M first optical transceivers fail.

Optionally, the optical communication system 100 may also receive the first switching completion indication information from the third optical communication device 40 through the second controller 206 . Wherein, the first switching completion indication information is determined by the third optical communication device 40 when the M second optical transceivers start to replace the M first optical transceivers to perform the corresponding first branch signal light Generated and sent after transfer. The first switching completion indication information includes at least second identification information corresponding to the M second optical transceivers and fault-free status information corresponding to the M second optical transceivers. Here, the no-fault status information is used to indicate a no-fault status. Further, the optical communication system may also forward the first switching completion indication information to the first controller 205 and/or the second optical communication device 30 through the second controller 206, so as to inform the M The second optical transceivers have started to replace the M first optical transceivers to transmit corresponding first branch signal light.

Further, in the case that the optical communication system 100 includes a first main path, a first backup path, a second main path, and a second backup path (the structure of the optical communication system 100 at this time is shown in FIG. 6 ), in the optical communication The system 100 determines through the first controller 205 and the second controller 206 that the first optical fiber 101 is faulty and the third optical fiber 103 and the second optical communication device 30 are not faulty, and controls the first optical switch group 207 and the second optical switch After the group 208 establishes the first optical path between the second optical coupler 202 and the third optical coupler 203, when the optical communication system 100 passes the sub-signal provided by the fifth optical coupler 209 through the first controller 205 When it is determined that the fifth optical fiber 105 is faulty, and according to the sub-signal light provided by the seventh optical coupler 211, it is determined that the seventh optical fiber 107 and the fifth optical communication device 6 are not faulty, the optical communication device 100 can send a The second controller 206 sends fifth indication information. For the specific process, refer to the relevant description in Embodiment 1, and details are not repeated here.

If the optical communication system 100 receives the fifth indication information through the second controller 206, and determines that the second optical fiber 102, the fourth optical fiber 104, and the third optical communication device 40 are not faulty, the The second controller 206 controls the second optical switch group 208 to establish a second optical path between the second optical coupler 202 and the fourth optical coupler 204 to pass through the third optical communication device 40 instead of the second optical communication device 30 to complete the transmission of signal light between the second optical communication device 30 and the first optical communication device 10 .

Further, when the optical communication system 100 receives the second switching completion indication from the third optical communication device 40 through the first controller 205 and the second controller 206, the first controller 205 may and the second controller 206 to control the first optical switch group 207 and the second optical switch group 208 to disconnect the first optical path. Wherein, the second switching completion indication information is generated and sent by the third optical communication device 40 after it is determined that it completely replaces the second optical communication device 30 . Here, for the specific process of disconnecting the above-mentioned first optical path by the optical communication system 100, reference may be made to the corresponding process in Embodiment 1, which will not be repeated here.

Further, after the first optical path is disconnected, the optical communication system 100 can control the first optical switch group 207 through the first controller 205 to establish an optical connection between the seventh optical coupler 211 and the second optical switch group 208. path, and send sixth indication information to the second controller 206 . Then, if the optical communication system 100 receives the sixth indication information through the second controller 206 and determines that the seventh optical fiber 107 is not faulty, it can control the second optical switch group 208 to switch between the sixth optical coupler 210 and the An optical path is established between the first optical switch group 207, so that an optical path is established between the fourth optical communication device 50 and the fifth optical communication device 60 through the sixth optical fiber and the eighth optical fiber. Here, the specific process for the optical communication system 100 to establish an optical path between the fourth optical communication device 50 and the fifth optical communication device 60 through the sixth optical fiber and the eighth optical fiber can be referred to the description in the first embodiment above. The corresponding process will not be repeated here.

In this embodiment, the optical communication system 100 detects that one or more of the first optical fiber 101, the third optical fiber 103, and the second optical communication device 30 are faulty through the dual-homing protection device, and then the faulty optical fiber can be Or the optical communication device switches to its spare part. Therefore, dual-homing protection for the second optical fiber 102 and the second optical communication device 30 can be realized through this method. Therefore, applying the above method and the optical communication system 100 to the fronthaul network or the dedicated line network can realize dual-homing protection for the backbone optical fiber and the central office equipment, and can improve the reliability of the fronthaul network or the dedicated line network.

Fig. 8 is a schematic structural diagram of a communication system provided by an embodiment of the present application. As shown in FIG. 8 , the communication system 800 includes at least the aforementioned optical communication system 100 , the first communication device 300 and the second communication device 400 . Wherein, the first communication device 300 establishes a communication connection with the second communication device 400 through the optical communication system 100 . The above optical communication system 100 is mainly used to bear the transmission of service data between the first communication device 300 and the second communication device 400 .

In a fronthaul scenario, the first communication device 300 may specifically be a terminal device. Here, the terminal device may be a wireless device that provides voice and/or data connectivity to the user, and the wireless device may be a handheld device with a wireless connection function, or other processing device connected to a wireless modem, via a wireless access network A mobile device that communicates with one or more core networks. Examples of wireless devices can be mobile phones, computers, tablets, personal digital assistants (PDAs), mobile Internet devices (MIDs), wearable devices, and e-book readers wait. As another example, the above wireless device may also be a portable, pocket, hand-held, computer built-in or vehicle-mounted mobile device. For another example, the foregoing wireless device may also be a mobile station (mobile station) or an access point (access point). This application does not specifically limit the type of terminal equipment. The second communication device 400 may specifically be a backhaul device. The first optical communication device 101 in the above-mentioned optical communication system 100 may be a device including an active antenna unit AAU or a remote radio unit RRU, and the second optical communication device 30 and the third optical communication device 40 may include baseband processing Unit BBU/distributed unit DU device.

In a dedicated line scenario, the foregoing first communication device 300 may specifically also be a terminal device. The foregoing second communication device 400 may be a public cloud device. The above-mentioned public cloud devices are related devices used to support the public cloud in the dedicated line scenario, such as cloud servers, cloud computing devices, etc., and this application does not specifically limit this. The first optical communication device in the optical communication system 100 may be customer premises equipment (CPE), and the second optical communication device 30 and the third optical communication device 40 may be cloud access point POP devices.

It should be understood that the optical communication system 100 and the dual-homing protection method provided by the embodiment of the present application are not only suitable for the dedicated line network of the fronthaul network mentioned above, but also applicable to other optical communication scenarios that require dual-homing protection for services.

Those skilled in the art should be aware that, in the above one or more examples, the functions described in this application may be implemented by hardware, software, firmware or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The specific implementation manners described above have further described the purpose, technical solutions and beneficial effects of the application in detail. It should be understood that the above descriptions are only specific implementation modes of the application and are not intended to limit the scope of the application. Scope of protection: All modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of this application shall be included within the scope of protection of this application.

Claims (30)

1. An optical communication system comprising a dual homing protection device, a first optical communication device, a second optical communication device, a third optical communication device, a first optical fiber, a second optical fiber, a third optical fiber, and a fourth optical fiber, wherein:

the dual-homing protection device is connected with the first optical communication device through the first optical fiber and the second optical fiber;

the dual-homing protection device is connected with the second optical communication device through the third optical fiber, and the dual-homing protection device is connected with the third optical communication device through the fourth optical fiber;

the dual-homing protection device is used for establishing an optical path between the first optical fiber and a fourth optical fiber or between the second optical fiber and the third optical fiber or the fourth optical fiber when one or more of the first optical fiber, the third optical fiber and the second optical communication device is/are detected to be in failure, so that signal light is transmitted between the first optical communication device and the second optical communication device or the third optical communication device.

2. The optical communication system of claim 1, wherein the dual homing protection device comprises: the optical coupler comprises a first optical coupler, a second optical coupler, a third optical coupler, a fourth optical coupler, a first optical switch group, a second optical switch group, a first controller and a second controller, wherein the first optical coupler is respectively connected with the first controller and the first optical switch group, the first controller is respectively connected with the first optical switch group and the third optical coupler, the first optical switch group is also connected with the second optical switch group, the second optical switch group is respectively connected with the second optical coupler, the second controller and the fourth optical coupler, the second controller is respectively connected with the second optical coupler and the fourth optical coupler, the first controller is connected with the second controller, the first optical coupler is connected with the first optical communication device through the first optical fiber, the second optical coupler is connected with the first optical communication device through the second optical fiber, the third optical coupler is connected with the second optical communication device through the third optical fiber, and the fourth optical communication device through the third optical fiber.

3. The optical communication system according to claim 2, wherein the signal light includes first signal light transmitted to the third optical coupler through the third optical fiber;

the third optical coupler is used for obtaining first sub-signal light and second sub-signal light according to the first signal light, transmitting the first sub-signal light to the first controller, and transmitting the second sub-signal light to the first optical switch group;

the first controller is to:

and when the optical power of the first sub-signal light is determined to be zero, or a first optical power difference value between the optical power of the first sub-signal light and a first preset optical power is determined to be equal to or greater than a first preset difference value, determining that the third optical fiber has a fault.

4. The optical communication system of claim 3, wherein the first controller is further configured to:

when the first optical power difference is smaller than the first preset difference, determining whether the first sub-signal light contains a target tuning signal, wherein the target tuning signal is a tuning signal pre-configured for the first signal light;

and if the first sub-signal light does not contain the target tuning signal, determining that the second optical communication device has a fault.

5. The optical communication system according to any one of claims 2 to 4, wherein the signal light further includes second signal light transmitted to the second optical coupler through the second optical fiber and third signal light transmitted to the fourth optical coupler through the fourth optical fiber;

the second optical coupler is used for obtaining third sub-signal light and fourth sub-signal light according to the light splitting of the second signal light, transmitting the third sub-signal light to the second controller, and transmitting the fourth sub-signal light to the second optical switch group;

the fourth optical coupler is used for obtaining fifth sub-signal light and sixth sub-signal light according to the light splitting of the third signal light, transmitting the fifth sub-signal light to the second controller, and transmitting the sixth sub-signal light to the second optical switch group;

the second controller is used for determining whether the second optical fiber is in failure according to the third sub-signal light;

the second controller is further configured to determine whether the fourth optical fiber and/or the third optical communication device is malfunctioning according to the fifth sub-signal light.

6. The optical communication system according to claim 5, wherein the first controller is configured to control the first optical switch group to establish an optical path between the second optical switch group and the third optical coupler and send first indication information to the second controller, if it is determined that the first optical fiber has a fault and the third optical fiber and the second optical communication device have no fault;

the second controller is configured to receive the first indication information, and control the second optical switch group to establish an optical path between the second optical coupler and the first optical switch group when it is determined that the second optical fiber is not faulty, so as to transmit the fourth sub-signal light to the second optical communication device through the third optical fiber and transmit the second sub-signal light to the first optical communication device through the second optical fiber.

7. The optical communication system according to claim 5 or 6, wherein the first controller is configured to control the first optical switch group to establish an optical path between the first optical coupler and the second optical switch group and send second indication information to the second controller in case that it is determined that the first optical fiber is not faulty and the third optical fiber and/or the second optical communication device is faulty;

the second controller is configured to receive the second indication information, and control the second optical switch group to establish an optical path between the first optical switch group and the fourth optical coupler under the condition that it is determined that the fourth optical fiber and the third optical communication device are not faulty, so as to transmit the sub-signal light provided by the first optical coupler to the third optical communication device through the fourth optical fiber, and transmit the sixth sub-signal light to the first optical communication device through the first optical fiber.

8. The optical communication system according to any one of claims 5 to 7, wherein the first controller is configured to send third indication information to the second controller in case it is determined that the first optical fiber and the third optical fiber, or the first optical fiber, the third optical fiber, and the second optical communication device, are failed;

the second controller is configured to receive the third indication information, and, in a case where it is determined that none of the second optical fiber, the fourth optical fiber, and the third optical communication device is faulty, control the second optical switch group to establish an optical path between the second optical coupler and the fourth optical coupler, so as to transmit the fourth sub-signal light to the third optical communication device through the fourth optical fiber, and transmit the sixth sub-signal light to the first optical communication device through the second optical fiber.

9. The optical communication system according to claim 3, wherein the second optical communication device includes a first combiner/splitter, N first tributary optical fibers, and N first optical transceivers, each of the first optical transceivers is connected to the third optical fiber through one tributary optical fiber and the first combiner/splitter, and N is a positive integer greater than or equal to 2;

the N first optical transceivers are configured to generate N first branch signal lights and transmit the N first branch signal lights to the first multiplexer/demultiplexer through the N first branch optical fibers, where each of the N first branch signal lights is preconfigured with a first branch pilot tone signal;

the first multiplexer/demultiplexer is configured to combine the N first branch signal lights to obtain the first signal light, and transmit the first signal light to the third optical coupler through the third optical fiber;

the first controller is further configured to determine whether the first sub-signal light includes a first branch pilot signal corresponding to each of the N first branch signal lights when it is determined that the first optical power difference is smaller than the first preset difference;

if the first controller determines that the first sub-signal light does not include a first branch set top signal preconfigured by M first branch signal lights of the N first branch signal lights, it is determined that M first optical transceivers for generating the M first branch signal lights have a failure, where M is a positive integer greater than or equal to 1.

10. The optical communication system according to claim 9, wherein the third optical communication device includes a second combiner/splitter, N second tributary optical fibers, and N second optical transceivers, each of the second optical transceivers is connected to the fourth optical fiber through one second tributary optical fiber and the second combiner/splitter, and the N first optical transceivers correspond to the N second optical transceivers one to one;

the first controller is used for controlling the first optical switch group to establish an optical path between the first optical coupler and the second optical switch group and sending fourth indication information to the second controller under the condition that the first optical fiber is determined to be free from faults and the M first optical transceivers are determined to be faulty;

the second controller is configured to receive the fourth indication information, and control the second optical switch group to establish an optical path between the first optical switch group and the fourth optical coupler when it is determined that neither the fourth optical fiber nor the N second optical transceivers have a failure, so as to replace the M failed first optical transceivers with M second optical transceivers corresponding to the M first optical transceivers among the N second optical transceivers to perform transmission of corresponding signal light.

11. The optical communication system according to claim 2, wherein the optical communication system further comprises a fourth optical communication device, a fifth optical communication device, a sixth optical communication device, a fifth optical fiber, a sixth optical fiber, a seventh optical fiber, and an eighth optical fiber, and the dual homing protection device further comprises a fifth optical coupler, a sixth optical coupler, a seventh optical coupler, and an eighth optical coupler;

the fourth optical communication device is connected with the fifth optical coupler through the fifth optical fiber, the fourth optical communication device is further connected with the sixth optical coupler through the sixth optical fiber, the fifth optical coupler is further connected with the first controller and the first optical switch group respectively, the sixth optical coupler is further connected with the second controller and the second optical switch group respectively, the fifth optical communication device is connected with the seventh optical coupler through the seventh optical fiber, the seventh optical coupler is connected with the first controller and the first optical switch group respectively, the sixth optical communication device is connected with the eighth optical coupler through the eighth optical fiber, the eighth optical coupler is further connected with the second controller and the second optical switch group respectively, and the first optical switch group is connected with the second optical switch group through the ninth optical fiber.

12. The optical communication system according to claim 11, wherein;

the first controller is used for controlling the first optical switch group and the second optical switch group to establish a first optical path between the second optical coupler and the third optical coupler in combination with the second controller under the condition that the first optical fiber is determined to be in fault and the third optical fiber and the second optical communication device are not in fault, wherein the first optical path passes through the ninth optical fiber;

the first controller is further configured to send fifth indication information to the second controller when it is determined that the fifth optical fiber has a fault according to the sub-signal light provided by the fifth optical coupler and it is determined that the seventh optical fiber and the fifth optical communication device have no fault according to the sub-signal light provided by the seventh optical coupler;

the second controller is configured to receive the fifth indication information, and control the second optical switch group to establish a second optical path between the second optical coupler and the fourth optical coupler under the condition that it is determined that the second optical fiber, the fourth optical fiber and the third optical communication device are not faulty, so as to complete transmission of signal light between the second optical communication device and the first optical communication device by the third optical communication device instead of the second optical communication device;

the third optical communication device is configured to send first handover completion indication information to the first controller and the second controller after determining to replace the second optical communication device;

when the first controller and the second controller both receive the first switching completion indication, the first controller controls the first optical switch group and the second optical switch group to disconnect the first optical path by combining with the second controller.

13. The optical communication system according to claim 12, wherein after the first optical path is disconnected, the first controller is further configured to control the first optical switch group to establish an optical path between the seventh optical coupler and the second optical switch group, and send sixth indication information to the second controller;

the second controller is configured to receive the sixth indication information, and control the second optical switch group to establish an optical path between the sixth optical coupler and the first optical switch group when it is determined that the seventh optical fiber is not faulty, so that an optical path is established between the fourth optical communication device and the fifth optical communication device through the sixth optical fiber, the ninth optical fiber and the seventh optical fiber.

14. A double-homing protection method is characterized in that the double-homing protection method is applied to an optical communication system, the optical communication system comprises a double-homing protection device, a first optical communication device, a second optical communication device, a third optical communication device, a first optical fiber, a second optical fiber, a third optical fiber and a fourth optical fiber, the double-homing protection device is connected with the first optical communication device through the first optical fiber and the second optical fiber, the double-homing protection device is connected with the second optical communication device through the third optical fiber, and the double-homing protection device is connected with the third optical communication device through the fourth optical fiber;

the method comprises the following steps:

detecting whether the first optical fiber, the third optical fiber and the second optical communication device have faults or not through the dual-homing protection device;

when one or more of the first optical fiber, the third optical fiber and the second optical communication device is determined to be in fault through a dual-homing protection device, an optical path is established between the first optical fiber and a fourth optical fiber or between the second optical fiber and the third optical fiber or the fourth optical fiber through the dual-homing protection device, so that signal light is transmitted between the first optical communication device and the second optical communication device or the third optical communication device.

15. The method of claim 14, wherein the dual homing protection device comprises: the optical coupler comprises a first optical coupler, a second optical coupler, a third optical coupler, a fourth optical coupler, a first optical switch group, a second optical switch group, a first controller and a second controller, wherein the first optical coupler is respectively connected with the first controller and the first optical switch group, the first controller is respectively connected with the first optical switch group and the third optical coupler, the first optical switch group is also connected with the second optical switch group, the second optical switch group is respectively connected with the second optical coupler, the second controller and the fourth optical coupler, the second controller is respectively connected with the second optical coupler and the fourth optical coupler, the first controller is connected with the second controller, the first optical coupler is connected with the first optical communication device through the first optical fiber, the second optical coupler is connected with the first optical communication device through the second optical fiber, the third optical coupler is connected with the second optical communication device through the third optical fiber, and the fourth optical communication device through the third optical fiber.

16. The method of claim 15, wherein the signal light further comprises a first signal light transmitted to the third optical coupler through the third optical fiber, and wherein the detecting, by the dual homing protection device, whether one or more of the first optical fiber, the third optical fiber, and the second optical communication device is malfunctioning comprises:

splitting the first signal light by the third optical coupler to obtain first sub-signal light and second sub-signal light;

transmitting the first sub-signal light to the first controller through the third optical coupler, and transmitting the second sub-signal light to the first optical switch group;

and when the first controller determines that the optical power of the first sub-signal light is zero or determines that a first optical power difference value between the optical power of the first sub-signal light and a first preset optical power is equal to or greater than a first preset difference value, determining that the third optical fiber has a fault.

17. The method of claim 16, wherein said detecting, by the dual homing protection device, whether one or more of the first optical fiber, the third optical fiber, the second optical communication device is malfunctioning further comprises:

when the first controller determines that the first optical power difference is smaller than the first preset difference, determining, by the first controller, whether the first sub-signal light includes a target set-top signal, where the target set-top signal is a set-top signal preconfigured by the first signal light;

and if the first controller determines that the first sub-signal light does not contain the target set-top signal, determining that the second optical communication device has a fault.

18. The method according to any one of claims 15 to 17, wherein the signal light further includes second signal light transmitted to the second optical coupler through the second optical fiber and third signal light transmitted to the fourth optical coupler through the fourth optical fiber;

the method further comprises the following steps:

splitting the second signal light by the second optical coupler to obtain third sub-signal light and fourth sub-signal light, transmitting the third sub-signal light to the second controller, and transmitting the fourth sub-signal light to the second optical switch group;

splitting the third signal light by the fourth optical coupler to obtain fifth sub-signal light and sixth sub-signal light, transmitting the fifth sub-signal light to the second controller, and transmitting the sixth sub-signal light to the second optical switch group;

determining, by the second controller, whether the second optical fiber is malfunctioning according to the third sub-signal light, and determining, by the second controller, whether the fourth optical fiber and/or the third optical communication device is malfunctioning according to the fifth sub-signal light.

19. The method of claim 18, wherein said establishing an optical path between the first and fourth optical fibers, or between the second and third or fourth optical fibers, through the dual homing protection device comprises:

in the case that the first controller determines that the first optical fiber has a fault and the third optical fiber and the second optical communication device have no fault, controlling the first optical switch group to establish an optical path between the second optical switch group and the third optical coupler through the first controller, and sending first indication information to the second controller;

receiving, by the second controller, the first indication information;

controlling, by the second controller, the second optical switch group to establish an optical path between the second optical coupler and the first optical switch group in the event that it is determined by the second controller that the second optical fiber is non-faulty.

20. The method of claim 18 or 19, wherein said establishing an optical path between said first and fourth optical fibers, or between said second and third or fourth optical fibers, through said dual homing protection device comprises:

in the case that the first controller determines that the first optical fiber is not faulty and the third optical fiber and/or the second optical communication device is faulty, controlling the first optical switch group to establish an optical path between the first optical coupler and the second optical switch group through the first controller, and sending second indication information to the second controller;

receiving, by the second controller, the second indication information, and controlling, by the second controller, the second optical switch group to establish an optical path between the first optical switch group and the fourth optical coupler in a case where it is determined by the second controller that the fourth optical fiber and the third optical communication device are not faulty.

21. The method of any one of claims 18-20, wherein said establishing an optical path between said first optical fiber and a fourth optical fiber, or between said second optical fiber and said third optical fiber or fourth optical fiber, by said dual homing protection device comprises:

sending, by the first controller, third indication information to the second controller in a case where it is determined by the first controller that the first optical fiber and the third optical fiber, or the first optical fiber, the third optical fiber, and the second optical communication device all have a failure;

and receiving the third indication information through the second controller, and controlling the second optical switch group to establish an optical path between the second optical coupler and the fourth optical coupler through the second controller when the second controller determines that the second optical fiber, the fourth optical fiber and the third optical communication device are not in fault.

22. The method according to claim 16, wherein the second optical communication device includes a first combiner-splitter, N first branch optical fibers, and N first optical transceivers, each first optical transceiver is connected to the third optical fiber through one branch optical fiber and the first combiner-splitter, the first sub-signal light is obtained by splitting, by the third optical coupler, the first signal light transmitted by the first combiner-splitter through the third optical fiber, the first signal light is obtained by combining, by the first combiner-splitter, N first branch signal lights transmitted on the N first branch optical fibers, the N first branch signal lights are generated by the N first optical transceivers and transmitted to the N first branch optical fibers, each of the N first branch signal lights is preconfigured with a branch channel-peak-modulated signal, N is a positive integer greater than or equal to 2;

the dual-homing protection device detects whether one or more of the first optical fiber, the third optical fiber and the second optical communication device fails, and comprises:

when the first controller determines that the first optical power difference is smaller than the first preset difference, determining, by the first controller, whether the first sub-signal light includes the N pre-configured branch signal lights of the first branch signal light;

if the first controller determines that the first sub-signal light does not include a branch line pilot tone signal pre-configured by M first branch signal lights of the N first branch signal lights, it is determined that M first optical transceivers for generating the M first branch signal lights have a failure, where M is a positive integer greater than or equal to 1.

23. The method of claim 22, wherein the third optical communication device comprises a second combiner/splitter, N second tributary optical fibers, and N second optical transceivers, each of the second optical transceivers is connected to the fourth optical fiber through one second tributary optical fiber and the second combiner/splitter, and the N first optical transceivers are in one-to-one correspondence with the N second optical transceivers;

the establishing an optical path between the first optical fiber and a fourth optical fiber or between the second optical fiber and the third optical fiber or the fourth optical fiber by the dual homing protection device includes:

transmitting fourth indication information to the second controller in case it is determined by the first controller that the M first optical transceivers have failed;

receiving, by the second controller, the fourth indication information;

under the condition that the second controller determines that the second optical fiber, the fourth optical fiber and the third optical communication device are not in fault, the second controller controls the second optical switch group to establish an optical path between the second optical fiber and the fourth optical fiber, so that M second optical transceivers corresponding to the M first optical transceivers in the N second optical transceivers replace the M first optical transceivers in fault to transmit corresponding signal light.

24. The method of claim 15, wherein the optical communication system further comprises a fourth optical communication device, a fifth optical communication device, a sixth optical communication device, a fifth optical fiber, a sixth optical fiber, a seventh optical fiber, and an eighth optical fiber, and wherein the dual homing protection device further comprises a fifth optical coupler, a sixth optical coupler, a seventh optical coupler, and an eighth optical coupler;

the fourth optical communication device is connected with the fifth optical coupler through the fifth optical fiber, the fourth optical communication device is further connected with the sixth optical coupler through the sixth optical fiber, the fifth optical coupler is further connected with the first controller and the first optical switch group respectively, the sixth optical coupler is further connected with the second controller and the second optical switch group respectively, the fifth optical communication device is connected with the seventh optical coupler through the seventh optical fiber, the seventh optical coupler is connected with the first controller and the first optical switch group respectively, the sixth optical communication device is connected with the eighth optical coupler through the eighth optical fiber, the eighth optical coupler is further connected with the second controller and the second optical switch group respectively, and the first optical switch group is connected with the second optical switch group through the ninth optical fiber.

25. The method of claim 24, wherein after determining by the first controller and the second controller that the first optical fiber is faulty and that the third optical fiber and the second optical communication device are non-faulty and controlling the first optical switch set and the second optical switch set to establish the first optical path between the second optical coupler and the third optical coupler, the method further comprises:

when it is determined that the fifth optical fiber has a failure according to the sub signal light provided by the fifth optical coupler and it is determined that the seventh optical fiber and the fifth optical communication device have no failure according to the sub signal light provided by the seventh optical coupler, the first controller transmits fifth indication information to the second controller;

and the second controller is used for the fifth indication information, and under the condition that the second optical fiber, the fourth optical fiber and the third optical communication device are determined to be fault-free, the second optical switch group is controlled to establish a second optical path between the second optical coupler and the fourth optical coupler, so that the third optical communication device replaces the second optical communication device to complete the transmission of the signal light between the second optical communication device and the first optical communication device.

26. The method of claim 25, further comprising:

when a second switching completion indication from the third optical communication device is received through the first controller and the second controller, the first optical switch group and the second optical switch group are controlled to disconnect the first optical path through the first controller and the second controller, wherein the second switching completion indication information is generated and sent by the third optical communication device after the third optical communication device is determined to replace the second optical communication device.

27. The method of claim 26, wherein after disconnecting the first optical path, the method further comprises:

controlling the first optical switch group to establish an optical path between the seventh optical coupler and the second optical switch group through the first controller, and sending sixth indication information to the second controller;

and receiving, by the second controller, the sixth indication information, and controlling, in a case where it is determined that the seventh optical fiber is not faulty, the second optical switch group to establish an optical path between the sixth optical coupler and the first optical switch group, so that an optical path is established between the fourth optical communication device and the fifth optical communication device through the sixth optical fiber, the ninth optical fiber, and the seventh optical fiber.

28. A communication system, characterized in that the communication system comprises a first communication device, an optical communication system according to any of claims 1-13, and a second communication device, the first communication device establishing a communication connection with the second communication device through the optical communication system;

the optical communication system is used for transmitting service data between the first communication equipment and the second communication equipment.

29. The communication system according to claim 28, wherein the first communication device is a terminal device, the second communication device is a backhaul device, the first optical communication apparatus in the optical communication system includes an active antenna unit AAU or a radio remote unit RRU, and the second optical communication apparatus and the third optical communication apparatus in the optical communication system include a baseband processing unit BBU or a distributed unit DU.

30. The communication system according to claim 28, wherein the first communication device is an end device, the second communication device is a public cloud device, the first optical communication device in the optical communication system is a Customer Premises Equipment (CPE), and the second optical communication device and the third optical communication device are cloud point of presence (POP) devices.

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