Service protection system and method based on multi-type transmission network

Abstract

The invention provides a service protection system and method based on a multi-type transmission network, and belongs to the technical field of transmission networks, the system comprises a first system access network element, a second system access network element, a protection device and a controller, the first system access network element and the second system access network element construct a first data transmission channel and a second data transmission channel; the controller judges whether to issue a switching instruction to the protection equipment or not according to the service quality state of the first or second data transmission channel; and the protection equipment responds to the switching instruction, and switches between the first data transmission channel and the second data transmission channel to realize service protection. The first data transmission channel and the second data transmission channel are respectively constructed through one network element in the multi-type transmission network, the two channels can be protected through the protection device, and the controller controls the protection device to be switched between the first data transmission channel and the second data transmission channel. The operation of service protection switching is decoupled from a technical system adopted by a transmission network bearing a data link, and complex network protocol adaptation is not needed.

Description

Technical Field

[0001] The present application relates to the field of transmission network technology, and in particular to a service protection system and method based on multi-type transmission networks. Background Art

[0002] With the continuous enrichment of services carried in the transmission networks of various operators and the evolution and upgrading of transmission network technology, transmission network systems with various technical systems have emerged, such as Optical Transport Network (OTN), Packet Transport Network (PTN), Synchronous Digital Hierarchy (SDH), Slicing Packet Network (SPN), etc. Each technical system corresponds to multiple manufacturers and different planes, which makes the number of transmission network systems increase.

[0003] There are currently two types of service protection technologies for transmission network systems. The first is a protection technology based on network configuration of a single technical system, and the second is a protection technology based on the nesting of multiple technical systems. Its essence is to use multiple layers of the first technical protection method in network systems with multiple different technical systems. The first protection technology requires the configuration of a dedicated protection channel in the corresponding network. For multiple systems, the protection channel resources need to be deployed separately, and the resources of multiple systems cannot be fully utilized. The second protection technology increases the demand for protection channel resources exponentially, and the multi-layer protection mechanism needs to be coordinated and configured, which is more complicated to implement. Summary of the invention

[0004] The present application provides a service protection system and method based on multi-type transmission networks, which is used to solve the defects in the prior art that a dedicated protection channel needs to be configured in the corresponding network, and protection channel resources need to be deployed separately for multiple systems, which makes it impossible to fully utilize the resources of multiple systems, or the demand for protection channel resources increases exponentially, and multiple layers of protection mechanisms need to be coordinated and configured, resulting in a more complicated implementation.

[0005] The present application provides a service protection system based on a multi-type transmission network, including at least one first system access network element, at least one second system access network element, a protection device and a controller, wherein the protection device is deployed on a first service side device at a service head end and a second service side device at a service terminal, and the first system access network element and the second system access network element are both one of the multi-type transmission networks; The first system access network element is used to establish a first data transmission channel between the first service side device and the second service side device; The second system access network element is used to establish a second data transmission channel between the first service side device and the second service side device; The controller is used to determine whether to send a switching instruction to the protection device according to the service quality status of the first data transmission channel or the service quality status of the second data transmission channel; The protection device is used for switching between the first data transmission channel and the second data transmission channel in response to the switching instruction to implement service protection.

[0006] As an embodiment, the protection device comprises at least an optical switch and a control module; The optical switch comprises an input interface, a first output interface, and a second output interface, the input interface is connected to the first service side device or the second service side device, the first output interface is connected to the first system access network element, and the second output interface is connected to the second system access network element; The control module is connected to the controller and the optical switch, and is used to report the status of the optical switch to the controller, and is also used to receive the switching instruction issued by the controller and send the switching instruction to the optical switch, so that the optical switch responds to the switching instruction and connects the input interface with the first output interface or the second output interface to realize switching between the first data transmission channel and the second data transmission channel.

[0007] As an embodiment, it also includes at least one first system network management platform; the first system network management platform is used to obtain the first device status corresponding to each first system access network element and the first link service quality status between each first system access network element, upload the first device status and the first link service quality status to the controller so that the controller determines the service quality status of the first data transmission channel; or, determine the service quality status of the first data transmission channel according to the first device status and the first link service quality status and upload it to the controller.

[0008] As an embodiment, the controller is used to determine whether the first device status and the first link service quality status meet the preset conditions. If any of the first device status or any of the first link service quality status meets the preset conditions, the switching instruction is sent to the protection device.

[0009] As an embodiment, it also includes at least one second system network management platform; the second system network management platform is used to obtain the second device status corresponding to each second system access network element and the second link service quality status between each second system access network element, upload the second device status and the second link service quality status to the controller so that the controller determines the service quality status of the second data transmission channel; or, determine the service quality status of the second data transmission channel according to the second device status and the second link service quality status and upload it to the controller.

[0010] As an embodiment, the controller is used to determine whether the second device status and the second link service quality status meet the preset conditions. If any second device status or any second link service quality status meets the preset conditions, the switching instruction is sent to the protection device, and the protection device is used to respond to the switching instruction to switch the second data transmission channel to the first data transmission channel.

[0011] As an embodiment, the service quality status includes one or more of the following: link connection status, data transmission delay status, data packet loss status, data packet bit error rate status, transmission system jitter status, link congestion status, and transmission equipment network element failure status through which the transmission link passes.

[0012] As an embodiment, the controller is further used to select one channel from the first data transmission channel and the second data transmission channel as a main channel and the other channel as a backup channel.

[0013] As an embodiment, the first data transmission channel and the second data transmission channel have the same bandwidth, interface type and transmission capability.

[0014] As an embodiment, the multi-type transmission network includes one or more of an optical transport network OTN, a packet transport network PTN, a synchronous digital hierarchy SDH and a sliced ​​packet network SPN.

[0015] The present application also provides a service protection method based on a multi-type transmission network, including: Deploy a protection device at a first service side device at a service head end and a second service side device at a service terminal respectively, and construct a first data transmission channel and a second data transmission channel between the first service side device and the second service side device; determining, according to the service quality status of the first data transmission channel or the service quality status of the second data transmission channel, whether to issue a switching instruction to the protection device, so that the protection device switches between the first data transmission channel and the second data transmission channel in response to the switching instruction to implement service protection; Among them, the first data transmission channel is constructed by at least one first system access network element, and the second data transmission channel is constructed by at least one second system access network element, and the first system access network element and the second system access network element are both one of the multi-type transmission networks.

[0016] The service protection system and method based on multi-type transmission networks provided by the present application respectively construct a first data transmission channel and a second data transmission channel through a network element in the multi-type transmission network, and the two channels can be protected by a protection device, which solves the problem that channel resources that need to be deployed separately for protection cannot be fully utilized for multiple systems. The controller controls the protection device to switch between the first data transmission channel and the second data transmission channel, and the service protection is decoupled from the transmission network that carries the data link. No complex network protocol adaptation is required, which solves the problem that the demand for protection channel resources increases exponentially due to the nested protection of multiple systems, and the need for coordinated configuration between multiple layers of protection mechanisms to achieve more complex problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the principle of the first existing business protection technology.

[0019] Figure 2 It is a schematic diagram of the principle of the second existing service protection technology.

[0020] Figure 3 It is a structural diagram of a service protection system based on multiple types of transmission networks provided by the present application.

[0021] Figure 4 It is a structural schematic diagram of the protection device provided by this application.

[0022] Figure 5 This is a schematic diagram of the state of the protection device provided in this application before switching channels.

[0023] Figure 6 This is a schematic diagram of the state of the protection device after switching channels provided by the present application.

[0024] Figure 7 This is one of the flow charts of the service protection method based on multi-type transmission networks provided in this application.

[0025] Figure 8 This is the second flow chart of the service protection method based on multi-type transmission networks provided by this application.

[0026] In the figure, 101-protection equipment, 1011-optical switch, 1012-control module, 1013-power module, 102-controller, 201-first system access network element, 202-first system network management platform, 301-second system access network element, 302-second system network management platform, 401-first business side equipment, 402-second business side equipment. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] It should be noted that all actions of acquiring signals, information or data in this application are carried out in compliance with the relevant data protection laws and policies of the country where they are located, and with the authorization given by the owner of the corresponding device.

[0029] Figure 1 This is a schematic diagram of the principle of the first existing service protection technology, such as Figure 1 As shown in the figure, the current protection technologies based on the system configuration of a single technical system, such as SNCP protection in OTN system, LSP protection in PTN system, MSP protection in SDH system, etc., are characterized by protecting the service through the same type of transmission network, and configuring dedicated redundant channels for protection, such as Figure 1 All network elements shown in the figure belong to a system that is networked using the same technical system. Figure 1 The solid line between access network element 1 and access network element 2 in FIG. 1 is the primary route, and the dotted line is the backup route. The disadvantage of this technology is that a dedicated protection channel needs to be configured in the corresponding system. Although there are multiple systems, each needs to deploy protection channel resources separately, and the multi-system resources cannot be fully utilized.

[0030] Figure 2 This is a schematic diagram of the principle of the second existing service protection technology, such as Figure 2As shown in the figure, the essence of the protection technology based on nesting of multiple technical systems is to use the multi-layer nesting of the second service protection technology in multiple networks with different technical systems. For example, on the basis of the 1-primary-1-backup protection route configured in the PTN system, the primary and backup routes are carried through the OTN system, and the primary and backup route protection is configured on the OTN system. Figure 2 As shown in the figure, the first system is a network that is networked using the same technical system, and the second system is another network that is networked using another technical system. On the basis of configuring primary and backup route protection for the service on the first system, two mutually backed-up channels are configured for the primary route of the first system in the second system, and two mutually backed-up channels are also configured for the backup route of the first system, thereby realizing multi-layer protection. When multi-system nested protection is adopted, the demand for protection channel resources increases exponentially, and the multi-layer protection mechanisms need to be configured in coordination, which is relatively complex to implement.

[0031] In order to solve at least one of the above technical problems, the present application provides a service protection system and method based on multi-type transmission networks, and the present application is described in detail below with reference to the accompanying drawings.

[0032] Figure 3 is a schematic diagram of the structure of a service protection system based on multiple types of transmission networks provided by the present application, such as Figure 3 As shown, the present application provides a service protection system based on a multi-type transmission network, including at least one first system access network element 201, at least one second system access network element 301, a protection device 101 and a controller 102.

[0033] The protection device 101 is deployed on the first service side device 401 at the service head end and the second service side device 402 at the service terminal, forming a pair of protection devices 101 at the service access head end and the terminal. The first service side device 401 and the second service side device 402 are devices for sending and receiving service data. At the service access head end, the first service side device 401 is used to send service data, and at the service access terminal, the second service side device 402 is used to receive service data.

[0034] The first system access network element 201 is used to build a first data transmission channel between the first service side device 401 and the second service side device 402. The first data transmission channel includes at least one first system access network element 201, which is used to meet the data communication needs between the first service side device 401 and the second service side device 402.

[0035] The second system access network element 301 is used to establish a second data transmission channel between the first service side device 401 and the second service side device 402. The second data transmission channel includes at least one second system access network element 301, which is used to meet the data communication requirements between the first service side device 401 and the second service side device 402. The second system access network element 301 and the first system access network element 201 do not belong to the same management domain.

[0036] The first system access network element 201 and the second system access network element 301 are both one of multiple types of transmission networks. Optionally, the multiple types of transmission networks include one or more of an optical transmission network, a packet transmission network, a synchronous digital hierarchy, and a sliced ​​packet network.

[0037] The controller 102 is used to determine whether to send a switching instruction to the protection device 101 according to the service quality status of the first data transmission channel or the service quality status of the second data transmission channel. The controller 102 can be centrally deployed in a local network management center to monitor the service quality status of the primary and backup routes and control the protection device 101 to perform a switching operation. A management data channel is established between the protection device 101 and the controller 102.

[0038] The protection device 101 is used for switching between the first data transmission channel and the second data transmission channel in response to the switching instruction to implement service protection.

[0039] Optionally, the first data transmission channel and the second data transmission channel have the same bandwidth, interface type and transmission capability, and switching between the two channels will not affect data transmission of the service.

[0040] It can be understood that the present application constructs a first data transmission channel and a second data transmission channel respectively through a network element in a multi-type transmission network, and can carry the main and backup channels in different types of transmission networks. It can make full use of the idle resources of multiple transmission systems to realize service protection based on multi-type transmission networks. The two channels can be protected by the protection device 101, which solves the problem that channel resources that need to be deployed separately for protection cannot be fully utilized for multi-system resources. The controller 102 controls the protection device 101 to switch between the first data transmission channel and the second data transmission channel. The service protection is decoupled from the transmission network that carries the data link, and does not require complex network protocol adaptation. It solves the problem that the demand for protection channel resources in the nested mode of multi-system protection has increased exponentially, and the multi-layer protection mechanism needs to be coordinated and configured to achieve more complex problems.

[0041] Figure 4 is a schematic diagram of the structure of the protection device 101 provided in this application, such as Figure 4As shown, based on the above embodiment, as an optional embodiment, the protection device 101 at least includes an optical switch 1011 and a control module 1012 .

[0042] The optical switch 1011 includes an input interface, a first output interface and a second output interface. The input interface is connected to the first service side device 401 or the second service side device 402, the first output interface is connected to the first system access network element 201, and the second output interface is connected to the second system access network element 301; the optical switch 1011 is responsible for directly physically connecting the input interface and the output interface, and selects to connect the input interface to the first output interface or the second output interface according to the instruction of the control module 1012. It should be noted that the input interface, the first output interface and the second output interface all support full-duplex communication mode.

[0043] The control module 1012 is connected to the controller 102 and the optical switch 1011, and is used to monitor the status of the optical switch 1011 through the network management interface and report the status of the optical switch 1011 to the controller 102, and is also used to receive the switching instruction issued by the controller 102 through the network management interface and send the switching instruction to the optical switch 1011, so that the optical switch 1011 responds to the switching instruction and connects the input interface with the first output interface or the second output interface to realize switching between the first data transmission channel and the second data transmission channel.

[0044] Optionally, the protection device 101 further includes a power module 1013 , which is responsible for providing power to the optical switch 1011 and the control module 1012 , and draws power through a power interface.

[0045] It can be understood that the protection device designed in the present application adopts physical switching to realize switching between the main and backup channels. There is no need to perceive the business and data transmission protocols therein. It can support multiple types of networks and utilize different types of transmission system resources to maximize the utilization of existing system resources. It has high security, simple structure and easy deployment.

[0046] On the basis of the above embodiments, as an optional embodiment, the system provided in the present application also includes at least one first system network management platform 202; the first system network management platform 202 is used to obtain the first device status corresponding to each first system access network element 201 and the first link service quality status between each first system access network element 201, upload the first device status and the first link service quality status to the controller so that the controller determines the service quality status of the first data transmission channel; or, determine the service quality status of the first data transmission channel according to the first device status and the first link service quality status and upload it to the controller.

[0047] The first system network management platform 202 includes software and computer equipment for managing the first system access network element 201. A network management data communication link is established between the first system access network element 201, and the device status reported by each first system access network element 201 and the service quality status of the intercommunication link between network elements are received through the link. Configuration instructions can be issued to all network elements in the system, and the service quality status of the first data transmission channel between the head end and the terminal is reported to the controller 102 through the northbound interface at a certain period (for example, once every 50ms).

[0048] Optionally, the controller 102 is used to determine whether the first device state and the first link service quality state meet preset conditions, and if any of the first device states or any of the first link service quality states meet the preset conditions, send the switching instruction to the protection device 101. Similarly, determining the service quality state of the first data transmission channel according to the first device state and the first link service quality state refers to determining whether the first device state and the first link service quality state meet preset conditions, and if any of the first device states or any of the first link service quality states meet the preset conditions, determining that the service quality state of the first data transmission channel is disconnected, indicating that the first data transmission channel is unavailable.

[0049] The system provided in the present application also includes at least one second system network management platform 302; the second system network management platform 302 is used to obtain the second device status corresponding to each second system access network element 301 and the second link service quality status between each second system access network element 301, upload the second device status and the second link service quality status to the controller so that the controller determines the service quality status of the second data transmission channel; or, determine the service quality status of the second data transmission channel according to the second device status and the second link service quality status and upload it to the controller.

[0050] The second system network management platform 302 includes software and computer equipment for managing the second system access network element 301. A network management data communication link is established between the second system access network element 301, and the device status reported by each second system access network element 301 and the service quality status of the intercommunication link between network elements are received through the link. Configuration instructions can be issued to all network elements in the system, and the service quality status of the second data transmission channel between the head end and the terminal is reported to the controller 102 through the northbound interface at a certain period (for example, once every 50ms).

[0051] Optionally, the controller 102 is used to determine whether the second device state and the second link service quality state meet preset conditions. If any of the second device states or any of the second link service quality states meet the preset conditions, the switching instruction is sent to the protection device 101, and the protection device 101 is used to switch the second data transmission channel to the first data transmission channel in response to the switching instruction. Similarly, determining the service quality state of the second data transmission channel according to the second device state and the second link service quality state refers to determining whether the second device state and the second link service quality state meet preset conditions. If any of the second device states or any of the second link service quality states meet the preset conditions, the service quality state of the second data transmission channel is determined to be disconnected, indicating that the second data transmission channel is unavailable.

[0052] The first system network management platform 301 and the second system network management platform 302 can be used to detect the service quality status of the first data transmission channel and the second data transmission channel. If the preset conditions are met, the alarm state is triggered and the alarm information is sent to the controller. The controller triggers the switching operation according to the alarm information.

[0053] As an embodiment, the service quality status includes one or more of the link connection status, data transmission delay status, data packet loss status, data packet bit error rate status, transmission system jitter status, link congestion status, and transmission equipment network element failure status through which the transmission link passes. The service quality status of each of the first data transmission channel and the second data transmission channel will be reported to their respective system network management platforms, namely, the first system network management platform 301 and the second system network management platform 302. The preset conditions include that the first data transmission channel or the second data transmission channel is disconnected or the data transmission delay status, data packet loss status, data packet bit error rate status, transmission system jitter status, link congestion status, and the transmission equipment network element failure status through which the transmission link passes reaches a preset value, affecting the service quality.

[0054] It is understandable that the present application reports alarm data to the controller 102 through the system network management platform, and after analyzing and judging the alarm data, sends a switching instruction for the switching operation to the protection device 101. The controller 102 is composed of software, computers and storage devices that support related functions. It does not need to process a large amount of network management data itself, but only needs to identify specific alarm data reported after analysis by the system network management platform. The control and management separation structure is adopted, and the decision-making process of the switching operation is implemented on the controller 102. The protection device does not need to perform complex data processing, but only needs to execute instructions. The equipment cost is low, and the cost required for protection resource configuration can be significantly reduced compared with the traditional method.

[0055] Figure 5 is a schematic diagram of the state of the protection device 101 provided in the present application before switching channels. Figure 6 is a schematic diagram of the state of the protection device 101 after switching channels provided by the present application, such as Figure 5 and Figure 6 As shown, based on the above embodiment, as an optional embodiment, the controller 102 is further used to select one channel from the first data transmission channel and the second data transmission channel as a main channel and the other channel as a backup channel.

[0056] In general, the service uses the first data transmission channel as the main route. When the first data transmission channel is interrupted according to the preset conditions, the first system network management platform 202 carrying the first data transmission channel reports the data to the controller 102, and the controller 102 simultaneously sends a switching instruction to the protection devices 101 at both ends. After receiving the switching instruction, the control module 1012 of the protection device 101 controls the optical switch 1011 to switch the physical connection state from the first output interface to the second output interface. The protection devices 101 at both ends complete the switching operation at the same time. At this time, the communication between the first service side device 401 and the second service side device is switched to the second data transmission channel, realizing the main-standby protection switching, and the interrupted service is restored.

[0057] It can be understood that the present application realizes backup protection across systems, improves business survivability in the event of a single system network-level failure, and has a simple protection switching mechanism without the need for complex protocol adaptation between multiple systems.

[0058] The following is a description of the service protection method based on a multi-type transmission network provided by the present application. The service protection method based on a multi-type transmission network described below and the service protection system based on a multi-type transmission network described above can refer to each other.

[0059] Figure 7 This is one of the flow charts of the service protection method based on multi-type transmission networks provided by the present application, such as Figure 7As shown, the present application also provides a service protection method based on a multi-type transmission network, including step S100 and step S200.

[0060] Step S100: deploy a protection device at a first service side device at a service head end and a second service side device at a service terminal respectively, and construct a first data transmission channel and a second data transmission channel between the first service side device and the second service side device.

[0061] Step S200, based on the service quality status of the first data transmission channel or the service quality status of the second data transmission channel, determines whether to send a switching instruction to the protection device, so that the protection device responds to the switching instruction and switches between the first data transmission channel and the second data transmission channel to achieve service protection.

[0062] Among them, the first data transmission channel is constructed by at least one first system access network element, and the second data transmission channel is constructed by at least one second system access network element, and the first system access network element and the second system access network element are both one of the multi-type transmission networks.

[0063] Figure 8 This is the second flow chart of the service protection method based on multi-type transmission network provided by the present application, such as Figure 8 As shown, the present application proposes a service protection method based on a multi-type transmission network, and its specific implementation steps include steps 001 to 005.

[0064] Step 001: Deploy the first and second data transmission channels at both ends of the service where protection is required. Both channels can meet the data communication requirements of the service side equipment, such as having the same bandwidth, interface type, and transmission capacity. Set up protection devices at both ends, the input port of the protection device is connected to the service side equipment, and the first and second output ports of the protection device are connected to the access devices carried by the two data transmission channels.

[0065] Step 002: Set the protection device to the initial state. The optical switch of the protection device is placed in the connected state of the first output port by default. At this time, the data communication between the business side devices at the head and the end is carried through the first data transmission channel. The system is in a normal working state, and the communication between the business side devices at the head and the end is normal.

[0066] Step 003: The transmission network carrying the first data transmission channel and the second data transmission channel reports the service quality status and performance status of the channels to the corresponding network management platform, and the network management platform determines whether the first data transmission channel and the second data transmission channel are in a normal and available state based on the reported information. The normal and available state refers to a state that will not affect the data communication quality between the service side devices at both ends, and will not cause communication interruption, data loss, etc.

[0067] Step 004: When the first data transmission channel becomes unavailable, the network management platform carrying the first data transmission channel receives an alarm message and reports the message to the controller of the protection device.

[0068] Step 005: The controller sends a switching instruction to the protection device through the data channel between the controller and the protection device. The protection device performs the switching operation according to the switching instruction. The optical switch connects the input interface to the second output interface. At this time, the data communication between the business side devices at both ends is switched to the second data transmission channel.

[0069] The service protection method based on multi-type transmission network provided in the present application has the same technical effect as the service protection system based on multi-type transmission network, and will not be described in detail.

[0070] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A service protection system based on multi-type transmission networks, characterized in that: It includes at least one first system access network element, at least one second system access network element, a protection device and a controller, wherein the protection device is deployed on a first service side device at a service head end and a second service side device at a service terminal, and the first system access network element and the second system access network element are both one of multiple types of transmission networks; The first system access network element is used to establish a first data transmission channel between the first service side device and the second service side device; The second system access network element is used to establish a second data transmission channel between the first service side device and the second service side device; The controller is used to determine whether to send a switching instruction to the protection device according to the service quality status of the first data transmission channel or the service quality status of the second data transmission channel; The protection device is used for switching between the first data transmission channel and the second data transmission channel in response to the switching instruction to implement service protection.

2. The service protection system based on multi-type transmission network according to claim 1, characterized in that: The protection device at least includes an optical switch and a control module; The optical switch comprises an input interface, a first output interface, and a second output interface, the input interface is connected to the first service side device or the second service side device, the first output interface is connected to the first system access network element, and the second output interface is connected to the second system access network element; The control module is connected to the controller and the optical switch, and is used to report the status of the optical switch to the controller, and is also used to receive the switching instruction issued by the controller and send the switching instruction to the optical switch, so that the optical switch responds to the switching instruction and connects the input interface with the first output interface or the second output interface to realize switching between the first data transmission channel and the second data transmission channel.

3. The service protection system based on multi-type transmission network according to claim 1, characterized in that: It also includes at least one first system network management platform; the first system network management platform is used to obtain the first device status corresponding to each first system access network element and the first link service quality status between each first system access network element, and upload the first device status and the first link service quality status to the controller so that the controller determines the service quality status of the first data transmission channel; Alternatively, the service quality status of the first data transmission channel is determined according to the first device status and the first link service quality status and uploaded to the controller.

4. The service protection system based on multi-type transmission network according to claim 3 is characterized in that: The controller is used to determine whether the first device state and the first link service quality state meet preset conditions, and if any of the first device states or any of the first link service quality states meet the preset conditions, send the switching instruction to the protection device.

5. The service protection system based on multi-type transmission network according to any one of claims 1 to 4, characterized in that: It also includes at least one second system network management platform; the second system network management platform is used to obtain the second device status corresponding to each second system access network element and the second link service quality status between each second system access network element, and upload the second device status and the second link service quality status to the controller so that the controller determines the service quality status of the second data transmission channel; Alternatively, the service quality status of the second data transmission channel is determined according to the second device status and the second link service quality status and uploaded to the controller.

6. The service protection system based on multi-type transmission network according to claim 5, characterized in that: The controller is used to determine whether the second device status and the second link service quality status meet the preset conditions. If any second device status or any second link service quality status meets the preset conditions, the switching instruction is sent to the protection device. The protection device is used to respond to the switching instruction and switch the second data transmission channel to the first data transmission channel.

7. The service protection system based on multi-type transmission network according to claim 5, characterized in that: The service quality status includes one or more of the following: link connection status, data transmission delay status, data packet loss status, data packet bit error rate status, transmission system jitter status, link congestion status, and transmission equipment network element failure status through which the transmission link passes.

8. The service protection system based on multi-type transmission network according to claim 1, characterized in that: The controller is further configured to select one of the first data transmission channel and the second data transmission channel as a main channel and the other channel as a standby channel.

9. The service protection system based on multi-type transmission network according to claim 1 or 8, characterized in that: The first data transmission channel and the second data transmission channel have the same bandwidth, interface type and transmission capability.

10. The service protection system based on multi-type transmission network according to claim 1, characterized in that: The multi-type transmission network includes one or more of an optical transport network OTN, a packet transport network PTN, a synchronous digital hierarchy SDH and a sliced ​​packet network SPN.

11. A service protection method based on a multi-type transmission network, characterized in that: include: Deploy a protection device at a first service side device at a service head end and a second service side device at a service terminal respectively, and construct a first data transmission channel and a second data transmission channel between the first service side device and the second service side device; determining, according to the service quality status of the first data transmission channel or the service quality status of the second data transmission channel, whether to issue a switching instruction to the protection device, so that the protection device switches between the first data transmission channel and the second data transmission channel in response to the switching instruction to implement service protection; Among them, the first data transmission channel is constructed by at least one first system access network element, and the second data transmission channel is constructed by at least one second system access network element, and the first system access network element and the second system access network element are both one of the multi-type transmission networks.

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