SDH network cross-board protection method and system

Abstract

The invention discloses an SDH network cross-board protection method and system, and the method comprises the steps: accessing an Ethernet signal into a first single board of first equipment through an RJ45, forwarding an IP service in the Ethernet signal through an Ethernet switching chip in the first single board, and packaging and mapping the IP service to a third single board of second equipment through an SDH chip in the first single board, sending the SDH optical network in the form of an SDH frame; a client-side Ethernet signal is accessed to a first single board of a first device through RJ45, and an IP service in the client-side Ethernet signal is forwarded through an Ethernet switching chip in the first single board and then transmitted to an Ethernet switching chip in a second single board through a special cable to be forwarded. And packaging and mapping the SDH chip in the first single board to a fourth single board of the second equipment, and sending the SDH optical network in the form of an SDH frame. A special cable is used for communicating Ethernet services of a main single board and a standby single board, which is an application scene which cannot be realized in the prior art.

Description

Technical Field

[0001] The present invention belongs to the technical field of SDH transmission networking, and in particular relates to an SDH network cross-board protection method and system. Background Art

[0002] EOS (Ethernet over SDH) is a technology that maps Ethernet frames onto SDH networks for transmission. The traditional implementation of EOS protection services is 1+1 protection within a single board: both the primary and backup links are implemented within the board, and the transmitter sends the same information on both the primary and backup channels (dual transmission). Under normal circumstances, the receiver selects the service on the primary channel. Because the services on the primary and backup channels are identical, when the primary channel is damaged, the service is restored by switching to the backup channel. This 1+1 service flow protection method is widely used in most networks. However, in certain scenarios, for example, if the 1+1 service paths are required to be on two different boards, the above-mentioned 1+1 (dual transmission and selective reception) protection method will not meet the requirements, and the Ethernet signal on the client side cannot be transmitted across boards. Summary of the Invention

[0003] The present invention provides an SDH network cross-board protection method and system, which are used to solve the technical problem that Ethernet signals on the client side cannot achieve cross-board transmission protection.

[0004] In a first aspect, the present invention provides an SDH network inter-board protection method for inter-board transmission between a first device and a second device, comprising:

[0005] The client-side Ethernet signal is connected to the first board of the first device through an RJ45. The IP service in the client-side Ethernet signal is forwarded by the Ethernet switching chip in the first board, then encapsulated and mapped by the SDH chip in the first board to the third board of the second device, and then sent to the SDH optical network in the form of SDH frames to form a primary transmission link.

[0006] The client-side Ethernet signal is connected to the first board of the first device through RJ45, and the IP service in the client-side Ethernet signal is forwarded by the Ethernet switching chip in the first board, and then transmitted to the Ethernet switching chip in the second board by a dedicated cable and forwarded. It is encapsulated and mapped to the fourth board of the second device according to the SDH chip in the first board, and sent to the SDH optical network in the form of SDH frames to form a backup transmission link.

[0007] In a second aspect, the present invention provides an SDH network inter-board protection system for inter-board transmission between a first device and a second device, comprising:

[0008] A first transmission module is configured such that a client-side Ethernet signal is connected to a first board of a first device via an RJ45, IP services in the client-side Ethernet signal are forwarded by an Ethernet switching chip in the first board, are then encapsulated and mapped by an SDH chip in the first board to a third board of the second device, and are sent over an SDH optical network in the form of SDH frames to form a primary transmission link;

[0009] The second transmission module is configured so that the client-side Ethernet signal is connected to the first single board of the first device through RJ45, the IP service in the client-side Ethernet signal is forwarded through the Ethernet switching chip in the first single board, and then transmitted to the Ethernet switching chip in the second single board by a dedicated cable and forwarded, and is mapped to the fourth single board of the second device according to the SDH chip encapsulation in the first single board, and is sent to the SDH optical network in the form of SDH frames to form a backup transmission link.

[0010] According to a third aspect, an electronic device is provided, comprising: at least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the steps of the SDH network cross-board protection method according to any embodiment of the present invention.

[0011] In a fourth aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, wherein when the program instructions are executed by a processor, the processor executes the steps of the SDH network cross-board protection method of any embodiment of the present invention.

[0012] The SDH network cross-board protection method and system of this application provides an application scenario for cross-board protection. It uses a dedicated cable to connect the Ethernet services of the primary and backup boards, an application scenario that is not possible with existing technologies. Furthermore, it pioneers the use of a custom CSF user byte (0x55) to notify the other end of a single fiber break, enabling EOS1+1 protection switching even in the event of a single fiber break. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0014] Figure 1 A flow chart of an SDH network cross-board protection method provided by one embodiment of the present invention;

[0015] Figure 2A schematic diagram of a cross-board transmission scenario is provided for an embodiment of the present invention;

[0016] Figure 3 A link service path flow chart of a specific embodiment is provided for an embodiment of the present invention;

[0017] Figure 4 A schematic diagram of cross-board protection is provided for an embodiment of the present invention;

[0018] Figure 5 A structural block diagram of an SDH network cross-board protection system provided by one embodiment of the present invention;

[0019] Figure 6 It is a structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] See also Figure 1 , which shows a flow chart of an SDH network cross-board protection method of the present application.

[0022] like Figure 1 As shown, the SDH network cross-board protection method specifically includes the following steps:

[0023] Step S101: A client-side Ethernet signal is connected to a first board of a first device via an RJ45. The IP service in the client-side Ethernet signal is forwarded by the Ethernet switching chip in the first board, then encapsulated and mapped by the SDH chip in the first board to a third board of the second device. The signal is then sent over the SDH optical network in the form of SDH frames, forming a primary transmission link.

[0024] In step S102, the client-side Ethernet signal is connected to the first board of the first device through RJ45, and the IP service in the client-side Ethernet signal is forwarded by the Ethernet switching chip in the first board, and then transmitted to the Ethernet switching chip in the second board by a dedicated cable and forwarded. According to the SDH chip encapsulation in the first board, it is mapped to the fourth board of the second device, and sent to the SDH optical network in the form of SDH frames to form a backup transmission link.

[0025] In this embodiment, a dedicated cable is used to interconnect the Ethernet services of the active and standby boards, an application scenario that cannot be achieved with existing technologies. Furthermore, a custom CSF user byte (0x55) is used to notify the peer end of a single fiber break, enabling EOS1+1 protection switching even in the event of a single fiber break.

[0026] In a specific embodiment, for ( Figure 2 ) The service communication process between the client side and line side of device A: The main optical port and the backup optical port are on boards ① and ② respectively. The client side Ethernet signal is connected to board ① through RJ45. Its IP service is forwarded by Ethernet switching chip U2, and then encapsulated and mapped into SDH / SONET VC (virtual container) by SDH chip U1. It is then sent to the SDH optical network in the form of SDH frames. The schematic diagram of the single-side product structure is shown as follows: Figure 3 shown.

[0027] Primary link service path: Client-side Ethernet signal -> RJ45 port on board ① -> U2 forwarding on board ① -> U1 encapsulation mapping on board ① -> optical port on board ① -> SDH transmission network

[0028] Backup link service path: Client-side Ethernet signal -> RJ45 port on board ① -> U2 forwarding on board ① -> dedicated cable -> U2 forwarding on board ② -> U1 encapsulation mapping on board ② -> optical port on board ② -> SDH transmission network

[0029] It should be noted that SFP: optical module; UI SDH: SDH chip, and U1 below specifically refers to the SDH chip; U2 EthernetSWITCH: Ethernet switching chip with 16 ports (port1 to 16) that supports Layer 2 forwarding capabilities.

[0030] Specifically, the CSF (Communication Signal Failure) notification under the GFP protocol enables the transmission of link alarm information. When link ① of device A receives light abnormally, a custom CSF user byte (0x55) is sent to link ① of device B, notifying device A that link ① has an alarm (single fiber break). The MCU then negotiates a switchover based on the status of link ②. If the status of link ② is higher, the switchover is not performed; otherwise, the switchover is to link ②. The link status priorities are shown in the following table:

[0031]

[0032] See also Figure 4 , Figure 4 The upper and lower devices in the middle are for business operations, and the left and right devices are for pass-through devices.

[0033] 1) Business Description

[0034] 1>Configure SNCP protection groups and SDH and N64 services on the upper and lower nodes.

[0035] 2> The intermediate node is equipped with time slots between two optical ports in the east and west directions respectively, and the east-west optical fibers are connected.

[0036] 1) Fault detection

[0037] At the service drop point, the interruption detection line status is reported based on the inline E1 LOF alarm. For example, if the red fiber is broken, the upper node's eastbound direction receives the alarm and switches to the westbound direction. The lower node's westbound direction receives the alarm and switches to the eastbound direction. The service flows from the upper node's westbound direction through the right device and drops to the lower node's eastbound direction.

[0038] 2> The device passing through the middle reports the interruption detection line status based on the optical port LOS alarm.

[0039] 2) Hardware switching

[0040] 1>After the MCU receives the interrupt, it switches the 64k cross-connection of the MCU.

[0041] See also Figure 5 , which shows a structural block diagram of an SDH network cross-board protection system of the present application.

[0042] like Figure 5 As shown, the SDH network cross-board protection system 200 includes a first transmission module 210 and a second transmission module 220 .

[0043] The first transmission module 210 is configured to connect the client-side Ethernet signal to the first board of the first device through the RJ45, forward the IP service in the client-side Ethernet signal through the Ethernet switching chip in the first board, and then encapsulate and map it to the third board of the second device by the SDH chip in the first board, and send it to the SDH optical network in the form of SDH frames to form a primary transmission link;

[0044] The second transmission module 220 is configured to connect the client-side Ethernet signal to the first board of the first device through RJ45, and the IP service in the client-side Ethernet signal is forwarded through the Ethernet switching chip in the first board, and then transmitted to the Ethernet switching chip in the second board by a dedicated cable and forwarded. It is mapped to the fourth board of the second device according to the SDH chip encapsulation in the first board, and sent to the SDH optical network in the form of SDH frames to form a backup transmission link.

[0045] It should be understood that Figure 5 Modules and references documented in Figure 1Therefore, the operations and features described above for the method and the corresponding technical effects also apply to Figure 5 The modules in it will not be described in detail here.

[0046] In other embodiments, the present invention further provides a computer-readable storage medium having a computer program stored thereon, wherein when the program instructions are executed by a processor, the processor is caused to execute the SDH network inter-board protection method in any of the above method embodiments;

[0047] As an embodiment, the computer-readable storage medium of the present invention stores computer-executable instructions, and the computer-executable instructions are configured as follows:

[0048] The client-side Ethernet signal is connected to the first board of the first device through an RJ45. The IP service in the client-side Ethernet signal is forwarded by the Ethernet switching chip in the first board, then encapsulated and mapped by the SDH chip in the first board to the third board of the second device, and then sent to the SDH optical network in the form of SDH frames to form a primary transmission link.

[0049] The client-side Ethernet signal is connected to the first board of the first device through RJ45, and the IP service in the client-side Ethernet signal is forwarded by the Ethernet switching chip in the first board, and then transmitted to the Ethernet switching chip in the second board by a dedicated cable and forwarded. It is encapsulated and mapped to the fourth board of the second device according to the SDH chip in the first board, and sent to the SDH optical network in the form of SDH frames to form a backup transmission link.

[0050] The computer-readable storage medium may include a program storage area and a data storage area, wherein the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created based on the use of the SDH network cross-board protection system, etc. In addition, the computer-readable storage medium may include a high-speed random access memory and may also include a memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the computer-readable storage medium may optionally include a memory remotely located relative to the processor, and these remote memories may be connected to the SDH network cross-board protection system via a network. Examples of the aforementioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0051] Figure 6 Schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. Figure 6As shown, the device includes: a processor 310 and a memory 320. The electronic device may also include: an input device 330 and an output device 340. The processor 310, the memory 320, the input device 330 and the output device 340 may be connected via a bus or other means. Figure 6 The example of a bus connection is shown. Memory 320 is the aforementioned computer-readable storage medium. Processor 310 executes various server functional applications and data processing by running the non-volatile software programs, instructions, and modules stored in memory 320, thereby implementing the SDH network cross-board protection method of the aforementioned method embodiment. Input device 330 can receive input digital or character information and generate key signal input related to user settings and function control of the SDH network cross-board protection system. Output device 340 may include a display device such as a display screen.

[0052] The electronic device can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not fully described in this embodiment, please refer to the method provided by the embodiment of the present invention.

[0053] As an embodiment, the electronic device is applied to an SDH network cross-board protection system and is used for a client, and includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to:

[0054] The client-side Ethernet signal is connected to the first board of the first device through an RJ45. The IP service in the client-side Ethernet signal is forwarded by the Ethernet switching chip in the first board, then encapsulated and mapped by the SDH chip in the first board to the third board of the second device, and then sent to the SDH optical network in the form of SDH frames to form a primary transmission link.

[0055] The client-side Ethernet signal is connected to the first board of the first device through RJ45, and the IP service in the client-side Ethernet signal is forwarded by the Ethernet switching chip in the first board, and then transmitted to the Ethernet switching chip in the second board by a dedicated cable and forwarded. It is encapsulated and mapped to the fourth board of the second device according to the SDH chip in the first board, and sent to the SDH optical network in the form of SDH frames to form a backup transmission link.

[0056] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus the necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or certain parts of the embodiment.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention 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 various embodiments of the present invention.

Claims

1. A SDH network inter-board protection method for inter-board transmission between a first device and a second device, characterized in that: include: The client-side Ethernet signal is connected to the first board of the first device through an RJ45. The IP service in the client-side Ethernet signal is forwarded by the Ethernet switching chip in the first board, then encapsulated and mapped by the SDH chip in the first board to the third board of the second device, and then sent to the SDH optical network in the form of SDH frames to form a primary transmission link. The client-side Ethernet signal is connected to the first board of the first device through RJ45, and the IP service in the client-side Ethernet signal is forwarded by the Ethernet switching chip in the first board, and then transmitted to the Ethernet switching chip in the second board by a dedicated cable and forwarded. It is encapsulated and mapped to the fourth board of the second device according to the SDH chip in the first board, and sent to the SDH optical network in the form of SDH frames to form a backup transmission link.

2. The SDH network cross-board protection method according to claim 1, characterized in that: After forming the primary transmission link and the backup transmission link, the method further includes: When the primary transmission link and the backup transmission link are switched, the port connecting the Ethernet switch chip of the current link to the SDH chip is shut down.

3. The SDH network cross-board protection method according to claim 1, characterized in that: in, The service protection switching process between the primary transmission link and the backup transmission link specifically includes: When both the primary transmission link and the backup transmission link are in normal state, the primary transmission link is selected in the initial state; When an alarm occurs on the primary transmission link, the Ethernet port of the primary transmission link is shut down and CSF is enabled. The Ethernet port of the backup transmission link is opened and CSF is disabled to complete the service switching to the backup transmission link.

4. An SDH network inter-board protection system, used for inter-board transmission between a first device and a second device, characterized in that: include: A first transmission module is configured such that a client-side Ethernet signal is connected to a first board of a first device via an RJ45, IP services in the client-side Ethernet signal are forwarded by an Ethernet switching chip in the first board, are then encapsulated and mapped by an SDH chip in the first board to a third board of the second device, and are sent over an SDH optical network in the form of SDH frames to form a primary transmission link; The second transmission module is configured so that the client-side Ethernet signal is connected to the first single board of the first device through RJ45, the IP service in the client-side Ethernet signal is forwarded through the Ethernet switching chip in the first single board, and then transmitted to the Ethernet switching chip in the second single board by a dedicated cable and forwarded, and is mapped to the fourth single board of the second device according to the SDH chip encapsulation in the first single board, and is sent to the SDH optical network in the form of SDH frames to form a backup transmission link.

5. An electronic device, characterized in that: include: At least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 3.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 3 is implemented.

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