WO2023124234A1

WO2023124234A1 - Method and device for communicating optical transport network services

Info

Publication number: WO2023124234A1
Application number: PCT/CN2022/118424
Authority: WO
Inventors: 陈巍; 郑瑜
Original assignee: 华为技术有限公司
Priority date: 2021-12-30
Filing date: 2022-09-13
Publication date: 2023-07-06
Also published as: CN116419100A

Abstract

The present invention provides a method for communicating optical transport network (OTN) services, which is applied to an OTN system comprising a first boundary point device (BP1) and a second boundary point device (BP2). The method comprises: the BP1 receiving, from a first port corresponding to a private network identifier, a first packet which is sent by a first access point device and comprises a service identifier and a first user side channel identifier; the BP1 sending to the BP2 a second packet comprising the private network identifier and the service identifier; the BP2 receiving, from a second port corresponding to the private network identifier, a third packet which is sent by a second access point device and comprises a service identifier and a second user side channel identifier; the BP2 allocating a network side channel corresponding to the service identifier in an optical transmission tunnel between BP1 and BP2 and corresponding to the private network identifier, and establishing a connection between a second user side channel and the network side channel; the BP2 sending to the BP1 a fourth packet comprising the private network identifier, the service identifier and a network side channel identifier; and the BP1 establishing a connection between the network side channel and a first user side channel according to the fourth packet.

Description

A method and device for connecting optical transport network services

This application claims the priority of a Chinese patent application with application number 202111656180.5 and titled "A Method and Device for Connecting Optical Transport Network Services" filed with the State Intellectual Property Office of China on December 30, 2021, the entire contents of which are incorporated by reference incorporated in this application.

technical field

The invention relates to the communication field, in particular to a method and equipment for connecting optical transport network services.

Background technique

With the development of the all-optical service network, the Optical Transport Network (OTN) gradually sinks to the metropolitan area, covering a large number of edge nodes and extending to access network equipment. For such a large-scale network, operators usually divide network domains, for example, according to administrative management areas, according to equipment suppliers, or according to technical fields.

In the scenario of domain-specific management, there is a need for cross-domain services. The existing technology generally adopts the method of unified network management configuration, that is, deploys a top-level unified network management controller to perform global management on all domains of the entire OTN network. Send relevant configuration messages to open up end-to-end services. This method has high management costs and poor flexibility.

Contents of the invention

Embodiments of the present invention provide a method and device for connecting optical transport network services. The establishment of an end-to-end service path does not require an additional top-level network management, and the connection of cross-domain services can be completed by the border point device itself.

In the first aspect, the embodiment of the present invention provides a method for connecting to an OTN service on an optical transport network, which is applied to an OTN system including a first border point device and a second border point device, including: the first border point device corresponds to the private network identifier The first port of the first access point device receives the first message sent by the first access point device, the first message includes the service identifier and the first user side channel identifier; the first border point device sends the second message to the second border point device, The second message includes a private network identifier and a service identifier; the second boundary point device receives the third message sent by the second access point device from the second port corresponding to the private network identifier, and the third message includes the service identifier, the second User-side channel identifier; the second border point device allocates the network-side channel corresponding to the service identifier in the optical transmission tunnel between the first border point device and the second border point device corresponding to the private network identifier, and establishes a second user-side channel The connection between the channel and the network side channel; the second border point device sends the fourth message to the first border point device, and the fourth message includes the private network identifier, the service identifier, and the identifier of the network side channel; the first border point device according to the first border point device Four packets, establishing a connection between the network side channel and the first user side channel.

Through such a method of dynamically allocating network side channel resources, the connection of cross-domain services can be completed by the border point device itself. Improve the flexibility and scalability of the system.

In a possible design, the optical transmission tunnel is an optical channel data unit ODU, and the network side channel is an optical service unit OSU; or, the optical transmission tunnel is a high-order ODU, and the network side channel is a low-order ODU. Further improve the flexibility of the system.

In yet another possible design, the OTN overhead carries the first packet, the second packet, the third packet, or the fourth packet. The first packet, the second packet, the third packet, or the fourth packet is an extended Path Computation Element Protocol PCEP packet or a Border Gateway Protocol BGP packet. These designs improve the compatibility of the system.

In a second aspect, an embodiment of the present invention provides a method for connecting to an OTN service on an optical transport network, which is applied to a border point device in the OTN, including: receiving the first message sent by the access point device through a port corresponding to the private network identifier, And receive the second message sent by another border point device, the first message includes the service identification and the user side channel identification, and the second message includes the private network identification and the service identification; according to the establishment of the first message and the second message The connection between the user-side channel and the network-side channel, where the network-side channel is located in the optical transmission tunnel between the current border point device and another border point device corresponding to the private network identifier.

Similarly, through such a method of dynamically allocating network side channel resources, the connection of cross-domain services can be completed by the border point device itself. Improve the flexibility and scalability of the system.

In a possible design, receiving the first message and the second message specifically includes: receiving the first message, determining that the second message has not been received according to the private network identifier and the service identifier, and sending the message to another border point device The third message including the private network identifier and the service identifier is received, and the second message returned by another border point device is received, and the second message includes the identifier of the network side channel. These designs increase the flexibility of the system.

In yet another possible design, receiving the first message and the second message specifically includes: receiving the first message, and determining that the second message sent by another border point device has been received according to the private network identifier and the service identifier; Establishing the connection between the user-side channel and the network-side channel according to the first message and the second message specifically includes: allocating the network-side channel corresponding to the service identifier in the optical transmission tunnel, and establishing the user-side channel and the network-side channel according to the user-side channel identifier. Side channel connection; the method further includes: sending a third message including the private network identifier, the service identifier, and the network side channel identifier to another border point device. These designs increase the flexibility of the system.

Likewise, in a possible design, the optical transmission tunnel is an ODU, and the network-side channel is an OSU; or, the optical transmission tunnel is a high-order ODU, and the network-side channel is a low-order ODU. In order to further improve the flexibility of the system.

In yet another possible design, packets are carried in the overhead of the OTN. The packet can be an extended PCEP packet or a BGP packet. These designs improve the compatibility of the system.

In a third aspect, an embodiment of the present invention provides an optical transmission system, including a first boundary point device and a second boundary point device that implement the method in the first aspect above, and the details are not repeated here.

In a fourth aspect, an embodiment of the present invention provides an optical transmission device, which has a function of realizing the behavior of the optical transmission boundary point device in the method of the second aspect above. The functions described above may be implemented by hardware, or may be implemented by executing corresponding software on the hardware. The hardware or software includes one or more units corresponding to the above functions, for example: a communication unit and a connection unit, where the communication unit is used to: receive the first message sent by the access point device through the port corresponding to the private network identifier; text, and receive the second message sent by another border point device, the first message includes the service identifier and the user side channel identifier, the second message includes the private network identifier and the service identifier; the connection unit is used to: according to the first message The text and the second message establish a connection between the user-side channel and the network-side channel, and the network-side channel is located in the optical transmission tunnel between the current border point device and another border point device corresponding to the private network identifier.

In a possible design, the structure of the optical transmission device includes a processor and a memory, the memory is used to store program codes for executing the above method, and the processor is configured to execute the program stored in the memory.

In a fifth aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions used by the above-mentioned optical transmission device, which includes a program designed to execute the above-mentioned aspect.

In the technical solution provided by the embodiment of the present invention, an end-to-end service path is established by dynamically allocating network side channels, without additional top-level network management, and the connection of cross-domain services can be completed by the boundary point device itself. Services can be configured independently. When the network scale and business scale continue to expand, it has high flexibility and good scalability.

Description of drawings

FIG. 1 is a schematic diagram of an OTN network system architecture provided by an embodiment of the present invention;

FIG. 2 is a schematic flow diagram of a connection to an OTN service provided by an embodiment of the present invention;

FIG. 3 is a schematic flow diagram of another connected OTN service provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an optical transmission device provided by an embodiment of the present invention;

Fig. 5 is another schematic structural diagram of an optical transmission device provided by an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe in detail the embodiments of the present invention in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present application, not all of them. Those of ordinary skill in the art know that, with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

The method for connecting an OTN service provided by the embodiment of the present invention is applied to an OTN system including multiple domains. FIG. 1 is an architecture diagram of an OTN system provided by an embodiment of the present invention. The OTN system includes an intermediate domain and four edge domains N1, N2, N3, and N4 connected through the intermediate domain. The intermediate domain includes 3 border point (Border Ponit, BP) devices BP1, BP2, BP3, respectively connected with the access point (Access Point, AP) devices AP1, AP2, AP3 in the 4 edge domains N1, N2, N3, N4 , AP4 connection. After the OTN service is connected, the application devices in the edge domains N1, N2, N3, and N4 are interconnected through access point devices and border point devices.

In the method for connecting OTN services provided by the embodiments of the present invention, application devices and access point devices in multiple edge domains form a private network. For example, in the system shown in Figure 1, N1 and N2 can form a private network; N1, N2, and N4 can also form a private network. The access point device in the edge domain is connected to the border point device in the middle domain, and the border point device in the middle domain can connect to multiple edge domains and support multiple private networks. For example, in Figure 1, BP1 connects two edge domains N1 and N4 through two ports.

Multiple services can be supported in the private network. For example, in the private network composed of N1 and N2, service A can be composed of application equipment E1 in N1 and application equipment E2 in N2; application equipment E1, E5 in N1 and application equipment in N2 The application equipment E2 and E6 constitute the service B. End-to-end services can be distinguished through different combinations of private network identifiers and service identifiers.

Applied to the OTN system shown in FIG. 1 above, the embodiments of the present invention provide a method for connecting OTN services. As shown in Figure 2, take the edge domains N1 and N2 to form a private network "1" and the application equipment E1 and E2 to form a service "A" in the private network as an example to realize end-to-end service connectivity. The method specifically includes the following steps:

S201. Configure private network identifiers and corresponding ports on border point devices, and configure optical transmission tunnels between border points corresponding to the private network identifiers.

Configure the private network identifier and the corresponding port on the border point device connected to the private network, and connect the corresponding port to the access point device of the edge domain included in the private network. In the example shown in Figure 2, the private network ID and the corresponding port connected to AP1 are configured in BP1. Configure the private network ID and the corresponding port connected to AP2 in BP2. The private network ID can consist of letters or numbers. For example, the private network ID is "1". Further, an optical transmission tunnel corresponding to the private network connected to BP2 is configured on BP1, and an optical transmission tunnel corresponding to the private network connected to BP1 is configured on BP2. The optical transmission tunnel may be an ODUk (Optical channel Data Unit, optical channel data unit) tunnel, or an OSU (Optical Service Unit, optical service unit) tunnel. The optical transmission tunnel includes multiple network-to-network interface (NNI), which are used to support the data access requirements of multiple services in the private network. It can be configured through the network management system or directly on the border point device.

S202. Configure services in the edge domain N1.

After configuration, the application equipment E1 in the edge domain can be connected to outside the domain through the access point device AP1. The service ID is configured in AP1. The business ID can be composed of letters or numbers, for example, the business ID is "A". The service ID can be unique within the private network or globally unique. The identifier of the first user-network interface (UNI) connected to BP1 corresponding to the service ID is also configured in AP1, for example, the identifier of the first user-side channel is the OSU channel number "1.1".

S203, AP1 sends the first packet to BP1.

The first message sent includes the service ID "A" and the first user-side channel identifier "1.1". The first message can be implemented by extending PCEP (Path Computation Element Protocol) or BGP (Border Gateway Protocol, Border Gateway Protocol), and carried in the overhead of OTN, such as GCC0/1/2, " Message" is the same.

S204, BP1 sends the second packet to BP2.

BP1 determines that the first message is associated with the private network ID "1" according to the port receiving the first message, and BP1 saves the corresponding relationship between the private network ID, the service ID, and the first user-side channel identifier. BP1 sends the second message to other border point devices on the same private network, so as to notify these border point devices of service-related information. The second message includes the private network ID, the service ID, and the device identification "BP1".

After receiving the second message, BP2 locally saves the corresponding relationship between the private network ID, the service ID, and the border point device identifier "BP1".

S205. Configure services in the edge domain N2.

Similar to the above step S202, after configuration, the application device E2 in the edge domain can be connected to outside the domain through the access point device AP2. The service ID "A" is configured on AP2. The identifier of the second user-network interface (UNI) connected to BP2 corresponding to the service ID is also configured in AP2, for example, the identifier of the second user-side channel is the OSU channel number "2.2".

S206, AP2 sends the third packet to BP2.

Similar to the above step S203, the third message sent includes the service ID "A" and the second user side channel identifier "2.2". The third packet can also be implemented by extending PCEP or BGP.

S207, BP2 connects the second user-side channel and the network-side channel.

BP2 determines that the third message is associated with the private network ID "1" according to the port receiving the third message, and further according to the service ID "A" included in the third message, and the second message received by BP2 in the aforementioned step 204 After saving the corresponding relationship between private network ID, service ID and "BP1", it is determined that a connection between BP1 and BP2 needs to be established for service "A". BP2 selects a network-side channel NNI from the optical transmission tunnel between BP1 and BP2, for example, the channel number is "x". The optical transmission tunnel is an optical channel data unit ODU, and the network side channel is an optical service unit OSU; or, the optical transmission tunnel is a high-order ODU, and the network side channel is a low-order ODU.

After determining the NNI of the network side channel, BP2 locally generates a cross mapping path to connect the second user side channel "2.2" and the network side channel "x".

S208, BP2 sends the fourth packet to BP1.

BP2 sends a fourth message to BP1 to notify BP1 of service-related NNI information. The fourth message includes the private network ID "1", the service ID "A", and the identifier "x" of the network side channel.

S209, BP1 connects the network side channel and the first user side channel.

According to the information in the fourth message, BP1 learns that BP2 has selected the network-side channel "x" of service "A", and BP1 generates a cross mapping path locally to connect the network-side channel "x" and the first user-side channel "x". 1.1", that is, the first user-side channel connecting BP1 to AP1 described in step S202 above.

Through the above method, an end-to-end service path is established between N1 and N2, without additional top-level network management, and the cross-domain service connection can be completed by the boundary point device itself. Services in different edge domains can be configured independently, and the scalability is good when the network scale continues to expand.

In some scenarios, BP1 can be directly connected to the user's headquarters network or cloud system. In this case, it is not necessary to perform the above step S203. It is only necessary to directly configure the service ID and user side channel in BP1, and the details will not be repeated.

In the embodiment shown in FIG. 2 , because N1 and N2 configure services in the private network at different times, the border point devices BP1 and BP2 perform message sending and receiving processing, and connect the network-side channel and the user-side channel at different times. Generally, the border point devices in the intermediate domain all have the same function, and they may receive the message sent by the AP device first or later. That is to say, a border point device BP may execute the processing steps of BP1 in FIG. 2 , or may execute the processing steps of BP2 in FIG. 2 .

As shown in Figure 3, the embodiment of the present invention provides a method for connecting OTN services applied to a border point device BP, where a private network identifier and a corresponding port have been configured in the BP, and another border point device in the OTN intermediate domain has been configured Light transmission tunnel between. The method includes the following steps:

S301. Receive the first packet sent by the access point device and the second packet sent by the other border point device, where the first packet includes the service identifier and the identifier of the user-side channel, and the second packet includes the dedicated Network logo and business logo;

A BP may first receive a message from an access point device, such as BP1 in Figure 2, or may receive a message from another BP first, such as BP2 in Figure 2.

If the BP determines that the second message sent by another BP has not been received according to the locally stored information after receiving the first message sent by the access point device, then it is the same as the aforementioned step S204, and sends a message to the other BP Send a message, carrying the private network ID, service ID, and local device identification, to notify the peer end that "this end has a service connection requirement", and the BP waits to receive the second message returned by the peer end. If the BP determines that it has received the second message sent by another BP according to the locally stored information after receiving the first message sent by the access point device, it means that it has the ability to perform subsequent connection between the user side channel and the network side. condition of the channel.

If the BP receives a message from another BP, it determines that it has not received the message from the AP according to the locally stored information, which means that the AP connected to this device has no "business connection requirements", and BP is waiting to receive this device. The connected AP sends a message, and after receiving it, connects the user-side channel and the network-side channel, and notifies another BP to also connect to establish an end-to-end service path. If the BP receives a message from another BP and determines that it has received the message from the AP according to the locally stored information, it means that the conditions for subsequent connection between the user-side channel and the network-side channel are met.

S302. Establish a connection between the user-side channel and the network-side channel according to the first message and the second message, where the network-side channel is located in the optical transmission tunnel.

Through the above method, multiple BP devices can establish an end-to-end service path without additional top-level network management, and the cross-domain service connection can be completed only by the border point device itself. The scalability of the OTN system is good.

The embodiment of the present invention also provides a schematic structural diagram of an optical transmission device, as shown in FIG. 4 , including a communication unit 401 and a connection unit 402; wherein:

The communication unit is used to: receive the first message sent by the access point device through the port corresponding to the private network identifier, and receive the second message sent by another border point device, the first message includes the service identifier and the user side channel identifier , the second message includes a private network identifier and a service identifier;

The connection unit is used to: establish a connection between the user-side channel and the network-side channel according to the first message and the second message, and the network-side channel is located at the optical link between the current border point device and another border point device corresponding to the private network identifier. in the transmission tunnel.

Further, the communication unit and the connection unit implement related functions in the foregoing methods, which will not be repeated here.

In an embodiment, the light delivery device is presented in the form of a functional unit. A "unit" here may refer to an application-specific integrated circuit (ASIC), a circuit, a processor and memory executing one or more software or firmware programs, an integrated logic circuit, and/or other devices that can provide the above functions device. In a simple embodiment, those skilled in the art can imagine that a processor, a memory and a communication interface can be used for implementation.

The optical transmission device in the embodiment of the present invention can also be implemented in the form of the computer device (or system) in FIG. 5 . FIG. 5 is a schematic diagram of computer equipment provided by an embodiment of the present invention. The computer device includes at least one processor 501 , a communication bus 502 , a memory 503 and at least one communication interface 504 , and may also include an IO interface 505 .

The processor can be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the program execution of the present invention.

A communication bus may include a path for transferring information between the above-mentioned components.

Communication interface, using any device such as a transceiver, used to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area network (Wireless Local Area Networks, WLAN), etc.

Memory can be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (random access memory, RAM) or other types of memory that can store information and instructions A dynamic storage device can also be an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical disc storage, optical disc storage ( including compact discs, laser discs, optical discs, digital versatile discs, blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be stored by a computer Any other medium, but not limited to. The memory can exist independently and be connected to the processor through the bus. Memory can also be integrated with the processor.

Wherein, the memory is used to store application program codes for executing the solution of the present invention, and the execution is controlled by the processor. The processor is configured to execute application program codes stored in the memory.

In a specific implementation, the processor may include one or more CPUs, and each CPU may be a single-core (single-core) processor or a multi-core (multi-Core) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).

In a specific implementation, as an embodiment, the computer device may further include an input/output (I/O) interface. For example, the output device may be a liquid crystal display (liquid crystal display, LCD), a light emitting diode (light emitting diode, LED) display device, a cathode ray tube (cathode ray tube, CRT) display device, or a projector (projector), etc. . The input device can be mouse, keyboard, touch screen device or sensing device etc.

The above computer equipment may be a general computer equipment or a special computer equipment. In a specific implementation, the computer device can be a desktop computer, a portable computer, a network server, a handheld computer (Personal Digital Assistant, PDA), a mobile phone, a tablet computer, a wireless terminal device, a communication device, an embedded device or a device similar to that shown in Figure 5. Structural equipment. The embodiment of the present invention does not limit the type of computer equipment.

The optical transmission boundary point device in FIG. 1 may be the device shown in FIG. 5 , and one or more software modules are stored in the memory. The optical transmission device may implement a software module through a processor and program codes in a memory to complete the above method.

An embodiment of the present invention also provides a computer storage medium for storing computer software instructions used by the device shown in FIG. 4 or FIG. 5 above, which includes a program designed to execute the above method embodiment. The methods described above can be implemented by executing stored programs.

Although the present invention has been described in conjunction with various embodiments herein, in the process of implementing the claimed invention, those skilled in the art can understand and Other variations of the disclosed embodiments are implemented. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that these measures cannot be combined to advantage.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, devices (devices), or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein. The computer program is stored/distributed on suitable media, supplied with or as part of other hardware, and may also take other forms of distribution, such as via the Internet or other wired or wireless telecommunication systems.

The present invention is described with reference to flowcharts and/or block diagrams of methods, apparatus (device) and computer program products according to embodiments of the present invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

Although the invention has been described in conjunction with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made thereto. Accordingly, the specification and drawings are merely illustrative of the invention as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the invention. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims

A method for connecting an optical transport network OTN service, applied to an OTN system including a first border point device and a second border point device, is characterized in that it includes:

The first border point device receives a first message sent by the first access point device from a first port corresponding to the private network identifier, and the first message includes a service identifier and a first user-side channel identifier;

The first border point device sends a second message to the second border point device, where the second message includes the private network identifier and the service identifier;

The second boundary point device receives a third packet sent by the second access point device from the second port corresponding to the private network identifier, and the third packet includes the service identifier, the second user-side channel identifier ;

The second border point device allocates the network side channel corresponding to the service identifier in the optical transmission tunnel between the first border point device and the second border point device corresponding to the private network identifier, and establishing a connection between the second user-side channel and the network-side channel;

The second border point device sends a fourth message to the first border point device, where the fourth message includes the private network identifier, the service identifier, and the identifier of the network side channel;

The first boundary point device establishes a connection between the network-side channel and the first user-side channel according to the fourth packet.
The method according to claim 1, wherein the optical transmission tunnel is an optical channel data unit (ODU), and the network side channel is an optical service unit (OSU); or, the optical transmission tunnel is a high-order ODU, and the The network side channel is a low-order ODU.
The method according to claim 1 or 2, characterized in that the first packet, the second packet, the third packet, or the fourth packet are carried in OTN overhead.
The method according to any one of claims 1 to 3, wherein the first message, the second message, the third message, or the fourth message is an extended Path Computation Element Protocol (PCEP) message Or Border Gateway Protocol BGP message.
A method for connecting optical transport network OTN services, applied to boundary point equipment in OTN, characterized in that it includes:

receiving the first message sent by the access point device through the port corresponding to the private network identifier, and receiving the second message sent by another border point device, where the first message includes the service identifier and the user-side channel identifier, The second message includes the private network identifier and the service identifier;

Establish a connection between the user-side channel and the network-side channel according to the first message and the second message, and the network-side channel is located between the current border point device and the other border point device corresponding to the private network identifier in the optical transmission tunnel between them.
The method according to claim 5, wherein the receiving the first message and the second message specifically comprises: receiving the first message, according to the private network identifier and the service Identify and determine that the second message has not been received, send a third message including the private network identifier and the service identifier to the other border point device, and receive the returned message from the other border point device A second packet, where the second packet includes the identifier of the network side channel.
The method according to claim 5, wherein the receiving the first message and the second message specifically comprises: receiving the first message, according to the private network identifier and the service identifying and determining that the second packet sent by the other border point device has been received;

The establishment of the connection between the user side channel and the network side channel according to the first message and the second message specifically includes: allocating the network side channel corresponding to the service identifier in the optical transmission tunnel, and according to the user A side channel identifier, establishing a connection between the user side channel and the network side channel;

The method further includes: sending a third message including the private network identifier, the service identifier, and the network-side channel identifier to the another border point device.
The method according to any one of claims 5 to 7, wherein the optical transmission tunnel is an optical channel data unit (ODU), and the network side channel is an optical service unit (OSU); or, the optical transmission tunnel is a high-speed order ODU, and the network side channel is a lower order ODU.
The method according to any one of claims 5 to 8, wherein the OTN overhead carries the first packet, the second packet, or the third packet.
The method according to any one of claims 5 to 9, wherein the first message, the second message or the third message is an extended Path Computation Element Protocol (PCEP) message or boundary Gateway Protocol BGP packets.
An optical transmission system, characterized by comprising a first boundary point device and a second boundary point device, wherein:

The first border point device is configured to: receive the first message sent by the first access point device from the first port corresponding to the private network identifier, and send a second message to the second border point device, and the first A message includes a service identifier and a first user-side channel identifier, and the second message includes the private network identifier and the service identifier;

The second boundary point device is configured to: receive the second message, receive a third message sent by the second access point device from a second port corresponding to the private network identifier, and the third message includes The service identifier and the second user-side channel identifier are allocated in the optical transmission tunnel corresponding to the private network identifier and between the first border point device and the second border point device. A network-side channel, and establish a connection between the second user-side channel and the network-side channel, and send a fourth message to the first boundary point device, where the fourth message includes the private network identifier, the service Identification, identification of the network side channel;

The first boundary point device is further configured to: establish a connection between the network-side channel and the first user-side channel according to the fourth packet.
The OTN system according to claim 11, wherein the optical transmission tunnel is an optical channel data unit (ODU), and the network side channel is an optical service unit (OSU); or, the optical transmission tunnel is a high-order ODU, so The above-mentioned network side channel is a low-order ODU.
The OTN system according to claim 11 or 12, wherein the OTN overhead carries the first packet, the second packet, the third packet, or the fourth packet.
The OTN system according to any one of claims 11 to 13, wherein the first message, the second message, the third message, or the fourth message is an extended Path Computation Element Protocol (PCEP) message text or Border Gateway Protocol BGP packets.
An optical transmission device, characterized by comprising: a communication unit and a connection unit, wherein,

The communication unit is configured to: receive the first message sent by the access point device through the port corresponding to the private network identifier, and receive the second message sent by another border point device, the first message includes the service an identifier and a user-side channel identifier, the second message includes the private network identifier and the service identifier;

The connection unit is configured to: establish a connection between the user-side channel and the network-side channel according to the first message and the second message, and the network-side channel is located at the boundary point device corresponding to the private network identifier and the In the optical transmission tunnel between the other boundary point devices mentioned above.
The optical transmission device according to claim 15, wherein the communication unit is specifically configured to: receive the first message, and determine that the second message has not been received according to the private network identifier and the service identifier second message, sending a third message including the private network identifier and the service identifier to the other border point device, and receiving a second message returned by the other border point device, the second The message includes the identifier of the network side channel.
The optical transmission device according to claim 15, wherein the communication unit is specifically configured to: receive the first message, and determine that the other packet has been received according to the private network identifier and the service identifier the second packet sent by the border point device;

The connection unit is specifically configured to: allocate the network-side channel corresponding to the service identifier in the optical transmission tunnel, and establish a connection between the user-side channel and the network-side channel according to the user-side channel identifier;

The communication unit is further configured to: send a third message including the private network identifier, the service identifier, and the network side channel identifier to the another border point device.
The optical transmission device according to any one of claims 15 to 17, wherein the optical transmission tunnel is an optical channel data unit (ODU), and the network side channel is an optical service unit (OSU); or, the optical transmission tunnel is a high-order ODU, and the network side channel is a low-order ODU.
The optical transmission device according to any one of claims 15 to 18, wherein the OTN overhead carries the first packet, the second packet, or the third packet.
The optical transmission device according to any one of claims 15 to 19, wherein the first message, the second message or the third message is an extended Path Computation Element Protocol (PCEP) message Or Border Gateway Protocol BGP message.