All-optical cross networking system and optical signal transmission method

Abstract

An all-optical cross networking system and an optical signal transmission method, the all-optical cross networking system comprising a plurality of OXC devices, each OXC device comprising an all-optical cross unit, an east-west interface, an optical transmission segment layer interface, a service interface, a branch disc and a line disc; the external end of the east-west interface is connected to another OXC device; the east-west interface, the optical transmission segment layer interface, the service interface, the branch disc and the line disc are all connected to the all-optical cross unit; the all-optical cross unit is used for switching the paths of the optical signals transmitted by the east-west interface, the optical transmission segment layer interface, the service interface, the branch disc and the line disc, to realize all-optical cross connection networking between the plurality of OXC devices. By connecting the external end of the east-west interface to other OXC devices, the long fibers and services accessed to one OXC device can not only be transmitted and scheduled in the OXC device, but also can be transmitted and scheduled to other OXC devices, so that more paths and resources can be connected and scheduled.

Description

Technical Field

[0001] This application relates to the field of communication technology, specifically to an all-optical cross-connection system and an optical signal transmission method. Background Technology

[0002] With the increasing throughput demands of OTN (optical transport network), ROADM (Reconfigurable Optical Add-Drop Multiplexer) can achieve multi-dimensional and high-capacity wavelength-level scheduling, offering advantages such as low latency and low power consumption, meeting the networking requirements of backbone, metropolitan area, and data center interconnections. However, with the increase in dimensions, the number of internal fiber connections at ROADM sites increases dramatically, leading to longer commissioning and maintenance times, increased susceptibility to errors, and a significant increase in footprint and power consumption.

[0003] OXC (Optical Cross-Connect) has been optimized and improved to address the problems encountered in the use of ROADM. It uses an all-optical unobstructed cross-connect optical backplane, which works in conjunction with highly integrated optical circuit boards and optical tributary boards to achieve fiber connection upon plugging in the board, avoiding complex internal fiber connections and improving commissioning and maintenance efficiency.

[0004] An OXC device is considered as a frame. Currently, the networking of OXC devices adopts a single frame design. The number of slots on an OXC device is very limited. Once the slots on an OXC device are full, it cannot be expanded, resulting in very limited resources that can be connected and scheduled. Summary of the Invention

[0005] This application provides an all-optical cross-connect networking system and an optical signal transmission method, aiming to solve the technical problem that the existing OXC equipment connection networking adopts a single frame design, the number of slots on an OXC equipment is very limited, and when the slots on an OXC equipment are full, it cannot be expanded, resulting in very limited resources that can be connected and scheduled.

[0006] In a first aspect, embodiments of this application provide an all-optical cross-connect networking system. The all-optical cross-connect networking system includes multiple OXC devices. Each OXC device includes an all-optical cross-connect unit, an east-west interface, an optical transmission section layer interface, a service interface, a tributary board, and a line board. The external end of the east-west interface is connected to another OXC device. The east-west interface, optical transmission section layer interface, service interface, tributary board, and line board are all connected to the all-optical cross-connect unit. The all-optical cross-connect unit is used to perform path switching on the optical signals transmitted by the east-west interface, optical transmission section layer interface, service interface, tributary board, and line board, thereby realizing all-optical cross-connect networking among multiple OXC devices.

[0007] Optionally, the all-optical cross unit includes an optical backplane and an optical switching device. The optical switching device is an M*N array optical switch or an optical chip, where M and N are both positive integers. When the optical switching device is an optical chip, the all-optical cross unit adopts an integrated design using a buried optical backplane and an optical chip.

[0008] Optionally, the all-optical cross unit is specifically used for:

[0009] The optical signal of another OXC device is received through the east-west interface, and the first path transmission is performed according to the routing information carried by the optical signal of the other OXC device. The first path transmission includes transmitting the optical signal of the other OXC device to the target node through another east-west interface, optical transport segment layer interface or service interface.

[0010] The optical transmission segment layer receives optical signals through the optical transmission segment layer interface and performs second path transmission based on the routing information carried by the optical transmission segment layer optical signals. The second path transmission includes transmitting the optical transmission segment layer optical signals to the line board. After the optical transmission segment layer optical signals are processed by the line board, they are transmitted to the target node through the east-west interface, the optical transmission segment layer interface, or the service interface.

[0011] The system receives service optical signals through a service interface and performs third-path transmission based on the routing information carried by the service optical signals. The third-path transmission includes transmitting the service optical signals to a tributary board. After the service optical signals are processed by the tributary board or line board, they are transmitted to the target node through an east-west interface, an optical transmission section layer interface, or a service interface. The target node includes an OXC device.

[0012] Optionally, the all-optical cross unit is specifically used for:

[0013] Detect whether the target line board to which the optical signal of the optical transmission section layer is to be transmitted is faulty;

[0014] If the target line board fails, the optical transmission section layer optical signal will be transmitted to the line board that has not failed.

[0015] If the target line board is not faulty, the optical transmission section layer optical signal will be transmitted to the target line board.

[0016] Optionally, the all-optical cross unit is specifically used for:

[0017] Detect whether the target tributary board to which the service optical signal is to be transmitted is faulty;

[0018] If the target tributary board fails, the service optical signal will be transmitted to the tributary board that has not failed.

[0019] If the target tributary board is not faulty, the service optical signal will be transmitted to the target tributary board.

[0020] Secondly, embodiments of this application provide an optical signal transmission method applied to an OXC device, the OXC device including an all-optical cross-connect unit, the optical signal transmission method comprising:

[0021] The all-optical cross-connect unit receives the optical signal of another OXC device through the east-west interface and performs first path transmission according to the routing information carried by the optical signal of the other OXC device. The first path transmission includes transmitting the optical signal of the other OXC device to the target node through another east-west interface, optical transport segment layer interface, or service interface.

[0022] The all-optical cross-connect unit receives optical transmission section layer optical signals through the optical transmission section layer interface and performs second path transmission based on the routing information carried by the optical transmission section layer optical signals. The second path transmission includes transmitting the optical transmission section layer optical signals to the line board. After the optical transmission section layer optical signals are processed by the line board, they are transmitted to the target node through the east-west interface, the optical transmission section layer interface, or the service interface.

[0023] The all-optical cross-connect unit receives service optical signals through the service interface and performs third-path transmission based on the routing information carried by the service optical signals. The third-path transmission includes transmitting the service optical signals to the tributary board. After the service optical signals are processed by the tributary board or the line board, they are transmitted to the target node through the east-west interface, the optical transmission section layer interface, or the service interface. The target node includes OXC equipment.

[0024] Optionally, transmitting the optical signal from the optical transmission section layer to the line board includes:

[0025] Detect whether the target line board to which the optical signal of the optical transmission section layer is to be transmitted is faulty;

[0026] If the target line board fails, the optical transmission section layer optical signal will be transmitted to the line board that has not failed.

[0027] If the target line board is not faulty, the optical transmission section layer optical signal will be transmitted to the target line board.

[0028] Optionally, transmitting the service optical signal to the tributary board includes:

[0029] Detect whether the target tributary board to which the service optical signal is to be transmitted is faulty;

[0030] If the target tributary board fails, the service optical signal will be transmitted to the tributary board that has not failed.

[0031] If the target tributary board is not faulty, the service optical signal will be transmitted to the target tributary board.

[0032] Thirdly, embodiments of this application provide an optical signal transmission device, which includes a processor, a memory, and an optical signal transmission program stored in the memory and executable by the processor, wherein when the optical signal transmission program is executed by the processor, it implements the steps of the optical signal transmission method as described above.

[0033] Fourthly, embodiments of this application provide a readable storage medium storing an optical signal transmission program, wherein when the optical signal transmission program is executed by a processor, it implements the steps of the optical signal transmission method as described above.

[0034] The beneficial effects of the technical solutions provided in this application include:

[0035] In this embodiment, the all-optical cross-connect networking system includes multiple OXC devices. Each OXC device includes an all-optical cross-connect unit, an east-west interface, an optical transmission section layer interface, a service interface, a tributary board, and a line board. The external end of the east-west interface is connected to another OXC device. The east-west interface, optical transmission section layer interface, service interface, tributary board, and line board are all connected to the all-optical cross-connect unit. The all-optical cross-connect unit is used to perform path switching on the optical signals transmitted by the east-west interface, optical transmission section layer interface, service interface, tributary board, and line board, thereby realizing all-optical cross-connect networking among multiple OXC devices. This embodiment divides the multiple interfaces of each OXC device into east-west interfaces, optical transmission section layer interfaces, and service interfaces according to their functions. The external end of the east-west interface is connected to other OXC devices, allowing long fibers and services accessing an OXC device to not only be transmitted and scheduled between the tributary boards and line boards within that OXC device, but also to other OXC devices, thus enabling the connection and scheduling of more paths and resources. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the OXC device structure according to an embodiment of the all-optical cross-connect networking system of this application;

[0037] Figure 2 This is a schematic diagram of an OXC equipment cluster network according to an embodiment of the all-optical cross-connect networking system of this application;

[0038] Figure 3 This is a first design schematic diagram of an all-optical cross-connect unit according to an embodiment of the all-optical cross-connect networking system of this application;

[0039] Figure 4 This is a second design schematic diagram of an all-optical cross-connect unit according to an embodiment of the all-optical cross-connect networking system of this application;

[0040] Figure 5 This is a schematic flowchart of an embodiment of the optical signal transmission method of this application;

[0041] Figure 6 This is a schematic diagram of the hardware structure of the optical signal transmission device involved in the embodiments of this application. Detailed Implementation

[0042] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0043] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0044] In a first aspect, embodiments of this application provide an all-optical cross-connect network system.

[0045] In one embodiment, reference is made to Figure 1 , Figure 1 This is a schematic diagram of the OXC device structure according to an embodiment of the all-optical cross-connect networking system of this application, as shown below. Figure 1 As shown, the all-optical cross-connect networking system includes multiple OXC devices. Each OXC device includes an all-optical cross-connect unit, an east-west interface, an optical transmission section layer interface, a service interface, a tributary board, and a line board. The external end of the east-west interface is connected to another OXC device. The east-west interface, optical transmission section layer interface, service interface, tributary board, and line board are all connected to the all-optical cross-connect unit. The all-optical cross-connect unit is used to perform path switching on the optical signals transmitted by the east-west interface, optical transmission section layer interface, service interface, tributary board, and line board, thereby realizing all-optical cross-connect networking among multiple OXC devices.

[0046] In this embodiment, the all-optical cross-connect network system includes multiple OXC devices. Each OXC device includes multiple interfaces, functionally divided into east-west interfaces, optical transmission section layer interfaces, and service interfaces. It should be noted that each of these interfaces can have multiple interfaces. Each OXC device includes multiple service boards, functionally divided into tributary boards and line boards, which can also have multiple tributary boards and line boards. The optical transmission section layer interface, also known as the OTS interface (Optical Transmission Section Layer), is used to transmit OTS optical signals, enabling connections across long optical fiber segments. The external end of each east-west interface connects to other OXC devices. (Continuing to refer to...) Figure 1 ,like Figure 1 As shown, the external end of the east-west interface 1 is connected to another OXC device 2, and the internal end of the east-west interface 1 is connected to the all-optical cross-connect unit. The external end of the east-west interface 2 is connected to another OXC device 3, and the internal end of the east-west interface 2 is also connected to the all-optical cross-connect unit. Each east-west interface, optical transmission section layer interface, service interface, tributary board, and line board is connected to the all-optical cross-connect unit. The all-optical cross-connect unit includes an optical backplane and optical switches, which are used to switch the optical signals transmitted by the east-west interface, optical transmission section layer interface, service interface, tributary board, and line board. This allows the optical transmission section layer and services accessing an OXC device to not only be transmitted and scheduled between the tributary boards and line boards inside the OXC device, but also to other OXC devices, thereby enabling the connection and scheduling of more paths and resources.

[0047] In this embodiment, the all-optical cross-connect networking system provided in this application can achieve highly flexible OXC device cluster networking, referring to... Figure 2 , Figure 2 This is a schematic diagram of an OXC equipment cluster network according to an embodiment of the all-optical cross-connect network system of this application, as shown below. Figure 2 As shown, the various OXC devices can use designs with the same or different dimensions. One interface or one optical transmission path is equivalent to one dimension, enabling networking scenarios of OXC100-OXC101-OXC102-OXC103. Figure 2 The optical signal λn for the uplink service passes through the uplink OXC100 equipment. Through the OXC100's all-optical cross-connect unit (optical backplane and optical switching devices), λn can be allocated to four directions: 01, 02, 03, and 04. This enables more multi-dimensional service scheduling. For example, allocating λn to direction 01 allows for intra-board switching or optical transport segment layer switching, thus enabling local service transfer. Allocating λn to directions 02, 03, and 04 schedules services to other OXC devices, achieving service scheduling and transmission between OXC devices and realizing new service scheduling resources. Figure 2 Services within the OXC100 device can be freely redirected to other OXC devices, providing more possibilities for routing paths. Through the extended connection of a single OXC device, cluster networking of OXC devices is achieved. Furthermore, in conjunction with optical signal system model programs, such as tag and channel management control systems, and combining channel configuration path information and channel configuration routing algorithms, flexible cluster networking and resource scheduling of OXC devices are realized.

[0048] Furthermore, in one embodiment, the all-optical cross unit includes an optical backplane and an optical switching device. The optical switching device is an M*N array optical switch or an optical chip, where M and N are both positive integers. When the optical switching device is an optical chip, the all-optical cross unit adopts an integrated design using a buried optical backplane and an optical chip.

[0049] In this embodiment, the circuit board device can employ a high-dimensional WSS (wavelength select switch). The WSS can be implemented using LCoS (Liquid Crystal on Silicon) or LC (Liquid Crystal) technology to achieve flexible wavelength scheduling and support dynamic channel spacing configuration. The optical backplane device can be, for example, a fixed fiber-optic backplane or a PLC (Planar Light Circuit) backplane with integrated optical chips. A large number of fiber optic ports can be integrated using MT / MPO (a type of ferrule and push-pull fiber optic interface) to achieve designs with 12-48 cores or higher, resulting in higher integration of the fiber optic ports. The optical switches can use integrated M*N MEMS (Micro-ElectroMechanical System) 2D or 3D arrays of optical switches. Through the combined design of these devices, all-optical cross-connection can be achieved.

[0050] In this embodiment, taking the wavelength selection dimension of the tributary board of the OXC device as X*Y (X>Y), the wavelength selection unit dimension of the line board as X*Y, the dimension of the all-optical cross-connect unit as M*N, the design dimension of the OXC device as Z (i.e., the number of interface slots of the OXC device), and the number of cluster frames as W (i.e., the number of OXC devices in the cluster network) as an example, refer to... Figure 3 , Figure 3 This is a first design schematic diagram of an all-optical cross-connect unit according to an embodiment of the all-optical cross-connect networking system of this application, as shown below. Figure 3As shown, using a fiber-optic passive optical backplane and an M*N array optical switch (the dimension of the M*N array optical switch is generally not very high), non-fully automatic switching within the frame can be used. The Z-dimensional of the tributary board and the line board is directly connected through the optical backplane to achieve Z-dimensional cross-connection within the frame, realizing Z-dimensional cross-connection of the equipment (X > Z). The excess XZ dimensions are connected to the all-optical cross-connect unit through the optical backplane to switch to the east-west extension interface area, expanding the cross-connection dimension between frames. Specifically, the Z cores of the X port of the tributary and line boards in the large dimension direction of the combined waveform are connected through the optical backplane. The remaining XZ dimensions of the tributary board's X interface are connected through the M interface of the M*N optical switch, which can be switched to the N port, designed as an extended service interface. The remaining XZ dimensions of the line board's X interface are connected through the M interface of the M*N optical switch, which can be switched to the N port. The XZ is designed as an east-west interface, first realizing the cross-connection design of the Z-dimensional (X ≥ Z) of the tributary lines connected within the frame. Meanwhile, the multiplexing dimension Y of the line board interfaces with the M-dimensional interface of the M*N optical switch via the optical backplane interface. The all-optical cross-connect unit can switch the signal to the N port. Some ports of the Y core of this N port are designed as optical transmission section layer interfaces, and some ports are designed as east-west interfaces (line extensions in the east-west interfaces). The OUT of the service interface can carry path information through the service signal and realize service switching through the all-optical cross-connect unit. The switching dimension of the service interface OUT is Z*W, and the number of scalable dimensional resources is shown in Table 1.

[0051] Table 1.

[0052]

[0053] In this embodiment, refer to Figure 4 , Figure 4 This is a second design schematic diagram of an all-optical cross-connect unit according to an embodiment of the all-optical cross-connect networking system of this application, as shown below. Figure 4As shown, the optical backplane and optical switch of the all-optical cross-connect unit can be integrated using a buried optical backplane and optical chip. This allows for the connection of all dimensions of the tributary board and line board with the all-optical cross-connect unit, enabling more dimensional resource scheduling. Continuing with the wavelength selection dimension of the OXC device's tributary board as X*Y, the wavelength selection unit dimension of the line board as X*Y, the dimension of the all-optical cross-connect unit as M*N, the design dimension of the OXC device as Z (i.e., the number of interface slots of the OXC device), and the number of cluster frames as W (i.e., the number of OXC devices in the cluster network), the all-optical cross-connect unit can be integrated. For example, by burying PLC-type optical chips to form an M*N design, M and N satisfy M>X*Z+Y*Z and N>X*Z, forming an active optical backplane. The multi-dimensional X direction of the branch board is connected to the M dimension of the M*N optical switch through the optical backplane, and the X dimension of the line board is connected to the N dimension of the M*N optical switch through the optical backplane, realizing the Z-dimensional branch line crossing within the frame and the X-dimensional optical crossing between frames. At the same time, the Y dimension of the line board is connected to the M dimension through the optical backplane, thereby realizing a new extended dimension. The number of scalable dimensional resources is shown in Table 2.

[0054] Table 2.

[0055]

[0056] Furthermore, in one embodiment, the all-optical cross unit is specifically used for:

[0057] The optical signal of another OXC device is received through the east-west interface, and the first path transmission is performed according to the routing information carried by the optical signal of the other OXC device. The first path transmission includes transmitting the optical signal of the other OXC device to the target node through another east-west interface, optical transport segment layer interface or service interface.

[0058] The optical transmission segment layer receives optical signals through the optical transmission segment layer interface and performs second path transmission based on the routing information carried by the optical transmission segment layer optical signals. The second path transmission includes transmitting the optical transmission segment layer optical signals to the line board. After the optical transmission segment layer optical signals are processed by the line board, they are transmitted to the target node through the east-west interface, the optical transmission segment layer interface, or the service interface.

[0059] The system receives service optical signals through a service interface and performs third-path transmission based on the routing information carried by the service optical signals. The third-path transmission includes transmitting the service optical signals to a tributary board. After the service optical signals are processed by the tributary board or line board, they are transmitted to the target node through an east-west interface, an optical transmission section layer interface, or a service interface. The target node includes an OXC device.

[0060] In this embodiment, when the optical signal of another OXC device enters the OXC device through an east-west interface, since the east-west interface is connected to the all-optical cross-connect unit, the routing information includes the source address, destination address, and transmission path of the optical signal. The all-optical cross-connect unit of the OXC device can transmit the optical signal carried by the optical signal of the other OXC device entering through the east-west interface to the target node through another east-west interface, optical transport segment layer interface, or service interface. The target node includes the OXC device, thereby enabling flexible cluster networking among multiple OXC devices. When the optical transport segment layer optical signal enters the OXC device through the optical transport segment layer interface, the all-optical cross-connect unit of the OXC device matches and determines the target line board according to the routing information carried by the optical transport segment layer optical signal, transmits the optical transport segment layer optical signal to the matched target line board, and then transmits it to the target node through the east-west interface, optical transport segment layer interface, or service interface. This enables automatic connection of the optical transport segment layer. The target node includes the OXC device, and the optical transport segment layer can be switched to other OXC devices, thereby realizing more connection resources at the optical transport segment layer. When a service optical signal is accessed by an OXC device through a service interface, the all-optical cross-connect unit of the OXC device can transmit the service optical signal to the corresponding tributary board according to the routing information carried by the service optical signal, thereby realizing the same-frame call on / off. The target node includes the OXC device. After the service optical signal is processed by the tributary board or the line board, that is, the path resolution of the service optical signal can be resolved on either the tributary board or the line board. After resolution, the control system issues a switching command to transmit the service optical signal to other OXC devices through the east-west interface, the optical transport section layer interface, or the service interface, thereby realizing the inter-frame call on / off.

[0061] Furthermore, in one embodiment, the all-optical cross unit is specifically used for:

[0062] Detect whether the target line board to which the optical signal of the optical transmission section layer is to be transmitted is faulty;

[0063] If the target line board fails, the optical transmission section layer optical signal will be transmitted to the line board that has not failed.

[0064] If the target line board is not faulty, the optical transmission section layer optical signal will be transmitted to the target line board.

[0065] In this embodiment, if the target line board to which the optical transmission section layer optical signal is to be transmitted fails, the optical transmission section layer optical signal can not only be transmitted to other line boards that have not failed, but also be transmitted to other OXC devices through the east-west interface, thereby providing more path dimension protection for the optical transmission section layer.

[0066] Furthermore, in one embodiment, the all-optical cross unit is specifically used for:

[0067] Detect whether the target tributary board to which the service optical signal is to be transmitted is faulty;

[0068] If the target tributary board fails, the service optical signal will be transmitted to the tributary board that has not failed.

[0069] If the target tributary board is not faulty, the service optical signal will be transmitted to the target tributary board.

[0070] In this embodiment, if the target tributary board to which the service optical signal is to be transmitted fails, the service optical signal can not only be transmitted to other tributary boards that have not failed, but also to other OXC devices through the east-west interface. This provides more path-dimensional protection for the service, whereas the traditional single-frame connection networking of OXC devices can only provide 1:Z protection for the service (where Z is the number of slots in the OXC device).

[0071] Secondly, embodiments of this application provide an optical signal transmission method.

[0072] In one embodiment, reference is made to Figure 5 , Figure 5 This is a schematic flowchart of an embodiment of the optical signal transmission method of this application, as shown below. Figure 5 As shown, this is applied to an OXC device, which includes an all-optical cross-connect unit, and the optical signal transmission method includes:

[0073] In step S10, the all-optical cross-connect unit receives the optical signal from another OXC device through the east-west interface and performs first path transmission based on the routing information carried by the optical signal of the other OXC device. The first path transmission includes transmitting the optical signal of the other OXC device to the target node through another east-west interface, optical transport segment layer interface, or service interface.

[0074] In this embodiment, the OXC device is the OXC device in the all-optical cross-connect network system. Each OXC device in the all-optical cross-connect network system includes multiple interfaces, which are functionally divided into east-west interfaces, optical transmission section layer interfaces, and service interfaces. It should be noted that there can be multiple east-west interfaces, optical transmission section layer interfaces, and service interfaces. Each OXC device includes multiple service boards, which are functionally divided into tributary boards and line boards. There can also be multiple tributary boards and line boards. The optical transmission section layer interface is the OTS interface (OTS stands for Optical Transmission Section). The optical transmission segment layer (OTS layer) is used to transmit OTS optical signals and realize the connection of long optical fibers across segments. The external end of each east-west interface connects to other OXC devices. Each east-west interface, optical transmission segment layer interface, service interface, tributary board, and line board is connected to the all-optical cross-connect unit. The all-optical cross-connect unit includes an optical backplane and optical switches, which are used to switch the paths of the optical signals transmitted by the east-west interface, optical transmission segment layer interface, service interface, tributary board, and line board. This allows long fibers and services accessed by an OXC device to not only be transmitted and scheduled between the tributary boards and line boards within the OXC device, but also to other OXC devices, thereby enabling the connection and scheduling of more paths and resources. When the optical signal of another OXC device is connected to the OXC device through an east-west interface, the routing information, including the source address, destination address, and transmission path of the optical signal, is provided by the east-west interface connected to the all-optical cross-connect unit. The all-optical cross-connect unit of the OXC device can transmit the optical signal carried by the optical signal of the other OXC device connected through the east-west interface to the target node through another east-west interface, optical transport segment layer interface, or service interface. The target node includes the OXC device, thereby enabling flexible cluster networking among multiple OXC devices.

[0075] Step S20: The all-optical cross-connect unit receives the optical transmission section layer optical signal through the optical transmission section layer interface, and performs second path transmission according to the routing information carried by the optical transmission section layer optical signal. The second path transmission includes transmitting the optical transmission section layer optical signal to the line board. After the optical transmission section layer optical signal is processed by the line board, it is transmitted to the target node through the east-west interface, the optical transmission section layer interface, or the service interface.

[0076] In this embodiment, when the optical transport section layer optical signal is accessed by the OXC device via the optical transport section layer interface, the all-optical cross-connect unit of the OXC device matches and determines the target line board according to the routing information carried by the optical transport section layer optical signal, transmits the optical transport section layer optical signal to the matched target line board, and then transmits it to the target node through the east-west interface, the optical transport section layer interface, or the service interface, thereby realizing automatic connection of the optical transport section layer. The target node includes the OXC device, and the optical transport section layer can be switched to other OXC devices, thereby realizing more connection resources of the optical transport section layer.

[0077] In step S30, the all-optical cross-connect unit receives the service optical signal through the service interface and performs third-path transmission according to the routing information carried by the service optical signal. The third-path transmission includes transmitting the service optical signal to the tributary board. After the service optical signal is processed by the tributary board or the line board, it is transmitted to the target node through the east-west interface, the optical transmission section layer interface, or the service interface. The target node includes OXC equipment.

[0078] In this embodiment, when the service optical signal is accessed by the OXC device through the service interface, the all-optical cross-connect unit of the OXC device can transmit the service optical signal to the corresponding tributary board according to the routing information carried by the service optical signal, thereby realizing the same-frame call on / off. The target node includes the OXC device. After the service optical signal is processed by the tributary board or the line board, that is, the path resolution of the service optical signal can be resolved on either the tributary board or the line board. After resolution, the control system issues a switching command to transmit the service optical signal to other OXC devices through the east-west interface, the optical transport section layer interface, or the service interface, thereby realizing the inter-frame call on / off.

[0079] Furthermore, in one embodiment, transmitting the optical signal from the optical transmission section layer to the line board includes:

[0080] Detect whether the target line board to which the optical signal of the optical transmission section layer is to be transmitted is faulty;

[0081] If the target line board fails, the optical transmission section layer optical signal will be transmitted to the line board that has not failed.

[0082] If the target line board is not faulty, the optical transmission section layer optical signal will be transmitted to the target line board.

[0083] In this embodiment, if the target line board to which the optical transmission section layer optical signal is to be transmitted fails, the optical transmission section layer optical signal can not only be transmitted to other line boards that have not failed, but also be transmitted to other OXC devices through the east-west interface, thereby providing more path dimension protection for the optical transmission section layer.

[0084] Furthermore, in one embodiment, transmitting the service optical signal to the tributary board includes:

[0085] Detect whether the target tributary board to which the service optical signal is to be transmitted is faulty;

[0086] If the target tributary board fails, the service optical signal will be transmitted to the tributary board that has not failed.

[0087] If the target tributary board is not faulty, the service optical signal will be transmitted to the target tributary board.

[0088] In this embodiment, if the target tributary board to which the service optical signal is to be transmitted fails, the service optical signal can not only be transmitted to other tributary boards that have not failed, but also to other OXC devices through the east-west interface. This provides more path-dimensional protection for the service, whereas the traditional single-frame connection networking of OXC devices can only provide 1:Z protection for the service (where Z is the number of slots in the OXC device).

[0089] Thirdly, embodiments of this application provide an optical signal transmission device.

[0090] Reference Figure 6 , Figure 6 This is a schematic diagram of the hardware structure of the optical signal transmission device involved in the embodiments of this application. In the embodiments of this application, the optical signal transmission device may include a processor, a memory, a communication interface, and a communication bus.

[0091] The communication bus can be of any type and is used to interconnect the processor, memory, and communication interface.

[0092] Communication interfaces include input / output (I / O) interfaces, physical interfaces, and logical interfaces used for interconnecting devices within the optical signal transmission equipment, as well as interfaces used for interconnecting the optical signal transmission equipment with other devices (such as other computing devices or user equipment). Physical interfaces can be Ethernet interfaces, fiber optic interfaces, ATM interfaces, etc.; user equipment can be displays, keyboards, etc.

[0093] Memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0094] The processor can be a general-purpose processor, which can call the optical signal transmission program stored in the memory and execute the optical signal transmission method provided in the embodiments of this application. For example, the general-purpose processor can be a central processing unit (CPU). The method executed when the optical signal transmission program is called can be referred to in the various embodiments of the optical signal transmission method of this application, and will not be repeated here.

[0095] Those skilled in the art will understand that Figure 6 The hardware structure shown does not constitute a limitation of this application and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0096] Fourthly, embodiments of this application also provide a readable storage medium.

[0097] The present application has a readable storage medium storing an optical signal transmission program, wherein when the optical signal transmission program is executed by a processor, it implements the steps of the optical signal transmission method as described above.

[0098] The method implemented when the optical signal transmission program is executed can be referred to in various embodiments of the optical signal transmission method of this application, and will not be repeated here.

[0099] It should be noted that the sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0100] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus. The terms "first," "second," and "third," etc., are used to distinguish different objects, etc., and do not indicate a sequence, nor do they limit "first," "second," and "third" to different types.

[0101] In the description of the embodiments of this application, terms such as "exemplary," "for example," or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplary," "for example," or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary," "for example," or "for instance" is intended to present the relevant concepts in a concrete manner.

[0102] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0103] In some processes described in the embodiments of this application, multiple operations or steps are included in a specific order. However, it should be understood that these operations or steps may not be executed in the order they appear in the embodiments of this application, or they may be executed in parallel. The sequence number of the operation is only used to distinguish different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed sequentially or in parallel, and these operations or steps may be combined.

[0104] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device to execute the methods described in the various embodiments of this application.

[0105] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An all-optical cross-connect networking system, characterized in that, The all-optical cross-connect networking system includes multiple OXC devices. Each OXC device includes an all-optical cross-connect unit, an east-west interface, an optical transmission section layer interface, a service interface, a tributary board, and a line board. The external end of the east-west interface is connected to another OXC device. The east-west interface, optical transmission section layer interface, service interface, tributary board, and line board are all connected to the all-optical cross-connect unit. The all-optical cross-connect unit is used to perform path switching on the optical signals transmitted by the east-west interface, optical transmission section layer interface, service interface, tributary board, and line board, thereby realizing all-optical cross-connect networking among multiple OXC devices. The all-optical cross unit is specifically used for: The optical signal of another OXC device is received through the east-west interface, and the first path transmission is performed according to the routing information carried by the optical signal of the other OXC device. The first path transmission includes transmitting the optical signal of the other OXC device to the target node through another east-west interface, optical transport segment layer interface or service interface. The optical transmission segment layer receives optical signals through the optical transmission segment layer interface and performs second path transmission based on the routing information carried by the optical transmission segment layer optical signals. The second path transmission includes transmitting the optical transmission segment layer optical signals to the line board. After the optical transmission segment layer optical signals are processed by the line board, they are transmitted to the target node through the east-west interface, the optical transmission segment layer interface, or the service interface. The system receives service optical signals through a service interface and performs third-path transmission based on the routing information carried by the service optical signals. The third-path transmission includes transmitting the service optical signals to a tributary board. After the service optical signals are processed by the tributary board or line board, they are transmitted to the target node through an east-west interface, an optical transmission section layer interface, or a service interface. The target node includes an OXC device.

2. The all-optical cross-connect networking system as described in claim 1, characterized in that, The all-optical cross unit includes an optical backplane and an optical switching device. The optical switching device is an M*N array optical switch or an optical chip, where M and N are both positive integers. When the optical switching device is an optical chip, the all-optical cross unit adopts an integrated design using a buried optical backplane and an optical chip.

3. The all-optical cross-connect networking system as described in claim 1, characterized in that, The all-optical cross unit is specifically used for: Detect whether the target line board to which the optical signal of the optical transmission section layer is to be transmitted is faulty; If the target line board fails, the optical transmission section layer optical signal will be transmitted to the line board that has not failed. If the target line board is not faulty, the optical transmission section layer optical signal will be transmitted to the target line board.

4. The all-optical cross-connect networking system as described in claim 1, characterized in that, The all-optical cross unit is specifically used for: Detect whether the target tributary board to which the service optical signal is to be transmitted is faulty; If the target tributary board fails, the service optical signal will be transmitted to the tributary board that has not failed. If the target tributary board is not faulty, the service optical signal will be transmitted to the target tributary board.

5. A method for transmitting optical signals, characterized in that, Applied to OXC equipment, the OXC equipment including an all-optical cross-connect unit, the optical signal transmission method includes: The all-optical cross-connect unit receives the optical signal of another OXC device through the east-west interface and performs first path transmission according to the routing information carried by the optical signal of the other OXC device. The first path transmission includes transmitting the optical signal of the other OXC device to the target node through another east-west interface, optical transport segment layer interface, or service interface. The all-optical cross-connect unit receives optical transmission section layer optical signals through the optical transmission section layer interface and performs second path transmission based on the routing information carried by the optical transmission section layer optical signals. The second path transmission includes transmitting the optical transmission section layer optical signals to the line board. After the optical transmission section layer optical signals are processed by the line board, they are transmitted to the target node through the east-west interface, the optical transmission section layer interface, or the service interface. The all-optical cross-connect unit receives service optical signals through the service interface and performs third-path transmission based on the routing information carried by the service optical signals. The third-path transmission includes transmitting the service optical signals to the tributary board. After the service optical signals are processed by the tributary board or the line board, they are transmitted to the target node through the east-west interface, the optical transmission section layer interface, or the service interface. The target node includes OXC equipment.

6. The optical signal transmission method as described in claim 5, characterized in that, The process of transmitting the optical signal from the optical transmission section layer to the line board includes: Detect whether the target line board to which the optical signal of the optical transmission section layer is to be transmitted is faulty; If the target line board fails, the optical transmission section layer optical signal will be transmitted to the line board that has not failed. If the target line board is not faulty, the optical transmission section layer optical signal will be transmitted to the target line board.

7. The optical signal transmission method as described in claim 5, characterized in that, The transmission of the service optical signal to the tributary board includes: Detect whether the target tributary board to which the service optical signal is to be transmitted is faulty; If the target tributary board fails, the service optical signal will be transmitted to the tributary board that has not failed. If the target tributary board is not faulty, the service optical signal will be transmitted to the target tributary board.

8. An optical signal transmission device, characterized in that, The optical signal transmission device includes a processor, a memory, and an optical signal transmission program stored in the memory and executable by the processor, wherein when the optical signal transmission program is executed by the processor, it implements the steps of the optical signal transmission method as described in any one of claims 5 to 7.

9. A readable storage medium, characterized in that, The readable storage medium stores an optical signal transmission program, wherein when the optical signal transmission program is executed by a processor, it implements the steps of the optical signal transmission method as described in any one of claims 5 to 7.

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