CN101854339B - Information transmission implementation method, module and transmission network node - Google Patents

Abstract

The embodiment of the invention discloses an information transmission implementation method, a module and a transmission network node. In the technical scheme of the embodiment of the invention, control information and/or management information to be transmitted are/is packaged into Ethernet service, and an Ethernet point-to-point protocol session is established between the transmission network nodes in order to simulate an Ethernet point-to-point link; based on the simulated Ethernet point-to-point link, the control information and/or the management information are/is transmitted between the nodes, consequently, the requirement of the transmission of the control information and/or the management information on bandwidth is met, meanwhile, the risk of communication interconnection between devices is reduced as well, and the requirement on reliability is met.

Description

Implementation method, module and transmission network node of information transmission

technical field

The present invention relates to the field of communication technology, in particular to an information transmission implementation method, module and transmission network node

Background technique

The DCN (Data Communication Network) in the transport network is mainly used to transmit the control information and management information of the nodes. For example, the alarm management information, performance monitoring information and network configuration data of the transport network nodes are all passed through DCN for transmission.

With the introduction of ASON (Automatic Switched Optical Network, Automatic Optical Switching Network) in the transport network, DCN also needs to be used to transmit GMPLS (Generalized Multi-Protocol Label Switching, General Multi-Protocol Label Switching) control signaling information and so on. ASON puts forward higher requirements on the reliability and communication bandwidth of DCN, requiring the DCN network to transmit corresponding control information to the destination node correctly and in time.

The current in-band DCN networking scheme is to use some overhead bytes of the transport network data frame as the physical bearer of the DCN to realize the transmission of control information and management information. For example, SDH (Synchronous Digital Hierarchy, synchronous digital system), see Figure 1, Figure 1 shows the structure of the SDH frame overhead area, the SDH frame overhead area is composed of an array of 9*9 bytes, mainly including regeneration section and multiplexing Among them, D1~D12 bytes are the data communication bytes in the SDH frame overhead area, and D1~D12 constitute DCC (Data Communication Channel, data communication channel). The current in-band DCN networking scheme uses DCC as the physical Bearer, using DCC to transmit control information and management information. In SDH, the SDH frame rate is 8000 frames per second, so the maximum communication bandwidth that DCC can provide is 12*8*8000=768kbps.

Using DCC to transmit control information and management information requires third-party devices in the network to support D-byte transparent transmission (the so-called D-byte transparent transmission means that the third-party device does not perform any processing on the received data carried by the D-byte. Directly pass it through the D byte). The existing networks of most operators are composed of equipment from multiple manufacturers, some of which may not support D-byte transparent transmission.

In the process of realizing the present invention, the inventor found that due to the introduction of ASON, the control information and management information that need to be transmitted through the DCN are increasing day by day, and the small communication bandwidth of the DCC has been difficult to meet the communication bandwidth requirements for information transmission through the existing DCN. Requirements; and some devices in the existing network may not support D-byte transparent transmission, and the risk of communication between devices is relatively high.

Contents of the invention

The technical problem to be solved by the embodiments of the present invention is to provide an information transmission implementation method, module and transmission network node, which can meet the communication bandwidth requirements of information transmission and reduce the risk of communication connection between devices.

In order to solve the above technical problems, the following technical solutions are provided in the embodiments of the present invention:

A method for implementing information transmission, comprising:

The first node establishes an Ethernet point-to-point protocol session with the second node, and obtains the identifier of the Ethernet point-to-point protocol session and the corresponding relationship between the optical port of the first node and the Ethernet point-to-point protocol session;

Encapsulating the control information and/or management information to be transmitted into an Internet protocol message;

Encapsulating the Internet protocol message into a point-to-point protocol frame;

Encapsulating the point-to-point protocol frame into an Ethernet point-to-point protocol frame, the Ethernet point-to-point protocol frame carrying the identifier of the Ethernet point-to-point protocol session;

Encapsulating the Ethernet point-to-point protocol frame into an Ethernet frame;

mapping the Ethernet frame to the payload area of the transport network frame, and sending the transport network frame to the second node through the optical port corresponding to the Ethernet point-to-point protocol session.

A method for implementing information transmission, comprising:

The system control module establishes an Ethernet point-to-point protocol session, and obtains an identifier of the Ethernet point-to-point protocol session, and the Ethernet point-to-point protocol session is established between the second node and the first node where the system control module is located;

Encapsulating the control information and/or management information to be transmitted into an Internet protocol message;

Encapsulating the Internet protocol message into a point-to-point protocol frame;

Encapsulating the point-to-point protocol frame into an Ethernet point-to-point protocol frame, the Ethernet point-to-point protocol frame carrying the identifier of the Ethernet point-to-point protocol session;

encapsulating the Ethernet point-to-point protocol frame into an Ethernet frame, and sending the Ethernet frame.

A method for implementing information transmission, comprising:

The Ethernet service module obtains the corresponding relationship between the optical port of the first node where it is located and the Ethernet point-to-point protocol session, and the Ethernet point-to-point protocol session is established between the first node and the second node;

receiving an Ethernet frame carrying control information and/or management information, and the Ethernet point-to-point protocol session identifier;

Mapping the Ethernet frame to the payload area of the transmission network frame, and sending the transmission network frame to the optical port corresponding to the Ethernet point-to-point protocol session.

A system control module comprising:

A session establishment unit, configured to establish an Ethernet point-to-point protocol session, and obtain an identifier of the Ethernet point-to-point protocol session, where the Ethernet point-to-point protocol session is established between the second node and the first node where the system control module is located;

An internet protocol unit, configured to encapsulate the control information and/or management information to be transmitted into an internet protocol message;

A point-to-point protocol unit, configured to encapsulate the Internet Protocol message into a point-to-point protocol frame;

An Ethernet point-to-point protocol unit, configured to encapsulate the point-to-point protocol frame into an Ethernet point-to-point protocol frame, and the Ethernet point-to-point protocol frame carries the identifier of the session;

The Ethernet sending unit is configured to encapsulate the Ethernet point-to-point protocol frame into an Ethernet frame, and send the Ethernet frame.

An Ethernet service module, comprising:

An information obtaining unit, configured to obtain the correspondence between the optical port of the first node where the Ethernet service module is located and the Ethernet point-to-point protocol session, and the Ethernet point-to-point protocol session is established between the first node and the second node;

A first receiving unit, configured to receive an Ethernet frame carrying control information and/or management information, and the Ethernet point-to-point protocol session identifier;

The first sending unit is configured to map the Ethernet frame to the payload area of the transport network frame, and send the transport network frame to the optical port corresponding to the Ethernet point-to-point protocol session.

A transport network node, the transport network node is connected to another transport network node in a communicable manner, and the transport network node includes:

A system control module, configured to establish an Ethernet point-to-point protocol session, and obtain an identifier of the Ethernet point-to-point protocol session, where the Ethernet point-to-point protocol session is established between the other transport network node and the transport network node; Encapsulating the control information and/or management information to be transmitted into an Internet protocol message; encapsulating the Internet protocol message into a point-to-point protocol frame; encapsulating the point-to-point protocol frame into an Ethernet point-to-point protocol frame, and the Ethernet point-to-point protocol The frame carries the identifier of the Ethernet point-to-point protocol session; the Ethernet point-to-point protocol frame is encapsulated into an Ethernet frame, and the Ethernet frame is sent;

The Ethernet service module is used to obtain the corresponding relationship between the optical port of the transport network node and the Ethernet point-to-point protocol session established by the system control module; receive the Ethernet frame sent by the system control module; The frame is mapped to the payload area of the transmission network frame, and the transmission network frame is sent to the optical port corresponding to the Ethernet point-to-point protocol session;

An optical port, configured to send the transport network frame to the other transport network node.

It can be seen from the above technical solution that in the embodiment of the present invention, the control information and/or management information to be transmitted is packaged into Ethernet services, and an Ethernet point-to-point protocol session is established between nodes in the transmission network to realize Ethernet point-to-point Link simulation: based on simulated Ethernet point-to-point links, control information and/or management information is transmitted between nodes, which can not only meet the bandwidth requirements of transmitting control information and/or management information, but also reduce the communication docking between devices risk and meet its reliability requirements.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention and the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments and the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative efforts.

FIG. 1 is a schematic diagram of an overhead area of a synchronous digital system frame provided by the prior art;

FIG. 2 is a flow chart of a method for implementing information transmission in Embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of a network structure of a transport network according to Embodiment 2 of the present invention;

Fig. 4 is a schematic structural diagram of a system control module according to Embodiment 3 of the present invention;

5 is a schematic structural diagram of a system control module according to Embodiment 4 of the present invention;

FIG. 6 is a schematic structural diagram of an Ethernet service module according to Embodiment 5 of the present invention;

FIG. 7 is a schematic diagram of a transport network node structure according to Embodiment 6 of the present invention.

Detailed ways

Embodiments of the present invention provide an information transmission implementation method, module, and transport network node, establish an Ethernet point-to-point protocol session between nodes in the transport network, package control information and/or management information into Ethernet services, and use Ethernet services The way of transmission, to transmit control information and/or management information between nodes.

Hereinafter, specific examples are used to describe in detail respectively.

A transport network node usually includes three types of modules: a system control module capable of system control, an Ethernet service module capable of processing Ethernet services, and a line module capable of transmitting and receiving optical signals.

In a specific application scenario, the above-mentioned system control module with system control capability may be: a system control card (SCC, System Control Card,), and the above-mentioned Ethernet service module with Ethernet service processing capability may be: Ethernet Network (ETH, Enternet) data module, the above-mentioned line module with optical signal sending and receiving capability may be: SDH line module.

For the convenience of description, in the embodiment of the present invention, the system control module with the system control function in the transport network node can be referred to as the SCC, the Ethernet service module with the Ethernet service processing capability can be referred to as the ETH data module, and the optical signal transceiver capability The line module of the SDH line module is used as an example for illustration. The present invention is not limited to the above examples.

Among them, the above-mentioned SCC is usually provided with an ETH port, and the above-mentioned ETH data module is provided with a FE (Fast Enternet, Fast Ethernet) port. After connecting the ETH port of the SCC with the FE port of the ETH data module with a network cable, the ETH data The module and SCC can use the above connections to communicate; the SDH line module is provided with one or more optical ports (also referred to as: optical ports), and the optical ports of the ETH data module and SDH line module can realize intercommunication through SDH cross configuration. A single transport network node may include one SCC, multiple ETH data modules, and multiple SDH line modules.

Embodiment one,

An implementation method of information transmission, please refer to FIG. 2, the above-mentioned implementation method of information transmission may include:

210. The first node establishes an Ethernet point-to-point protocol session with the second node, and obtains the identification of the above-mentioned Ethernet point-to-point protocol session and the corresponding relationship between the optical port of the first node and the above-mentioned Ethernet point-to-point protocol session;

Specifically, the first node and the second node can use their respective actual MAC (Media Access Control, Media Access Control) addresses, or use their respective simulated logical MAC addresses to negotiate to establish a communication between the first node and the second node. Ethernet Point-to-Point Protocol sessions.

During the process of establishing an Ethernet point-to-point protocol session with the second node, the first node can obtain the corresponding relationship between its optical port and the established session. For example, in an application scenario, the first node can generate an optical port address comparison table, and the above optical port address comparison table can record the MAC address information for the second node and the first node to negotiate to establish an Ethernet point-to-point protocol session, and the first node A node receives the optical port information of the Ethernet P2P session negotiation information, and the first node can obtain the corresponding relationship between the optical port of the first node and the above Ethernet P2P session in the above manner.

In one application scenario, the information recorded in the optical port address comparison table of the first node may include: the optical port information of the first node receiving the above session negotiation information, and the MAC address of the first node corresponding to the above session and the above session corresponding At least one of the MAC addresses of the second node.

Similarly, the second node may also establish its optical port address comparison table based on the above method, and obtain the corresponding relationship between its optical port and the session.

220. Encapsulate the control information and/or management information to be transmitted into an Internet protocol message;

The foregoing control information and/or management information may be received by the first node and sent by other nodes, or may be generated by the first node itself. The control information includes at least ASON signaling information, and the management information includes at least one of the following information: node alarm information and gateway configuration information.

230. Encapsulate the above-mentioned Internet protocol message into a point-to-point protocol frame;

240. Encapsulate the above-mentioned point-to-point protocol frame into an Ethernet point-to-point protocol frame, where the above-mentioned Ethernet point-to-point protocol frame carries the identifier of the above-mentioned point-to-point protocol session;

250. Encapsulate the above-mentioned Ethernet point-to-point protocol frame into an Ethernet frame;

Wherein, the source MAC address carried by the Ethernet frame is the MAC address of the first node corresponding to the Ethernet point-to-point protocol session, and the destination MAC carried by the Ethernet frame is the MAC address of the second node corresponding to the Ethernet point-to-point protocol session. MAC address.

260. Map the aforementioned Ethernet frame to the payload area of the transport network frame, and send the aforementioned transport network frame to the second node through the optical port corresponding to the aforementioned point-to-point protocol session.

After receiving the above transport network frame, the second node may demap the above transport network frame in a corresponding manner to obtain the Ethernet frame carried by it, and gradually parse the above Ethernet frame to obtain the control information carried by it and/or management information.

It can be seen from the above technical solution that in this embodiment, the control information and/or management information to be transmitted is packaged into Ethernet services, and an Ethernet point-to-point protocol session is established between nodes in the transmission network to realize an Ethernet point-to-point chain Road simulation; based on simulated Ethernet point-to-point links, control information and/or management information is transmitted between nodes, which can not only meet the bandwidth requirements for transmitting control information and/or management information, but also reduce the risk of communication docking between devices , to meet its reliability requirements.

Embodiment two,

An implementation method of information transmission. For ease of understanding, this example takes each transmission network node including at least three modules of SCC, ETH data module, and SDH line module as an example to specifically illustrate the implementation process of information transmission between transmission network nodes.

First, please refer to FIG. 3 . FIG. 3 is a schematic diagram of a transport network according to Embodiment 2 of the present invention. The transport network shown in FIG. 3 includes: a node A, a node B, and a node C.

Wherein, node A includes: system control card 110, ETH data module 120, optical port (1, 1), optical port (2, 1), optical port (3, 1), optical port (4, 1). Wherein, the optical port (1, 1) indicates that the board position number of the SDH line module to which the optical port belongs is No. 1, the port number of the optical port on the SDH line module is No. 1, and so on.

Node B includes: system control card 210, ETH data module 220, optical port (11, 1), optical port (12, 1), optical port (13, 1), optical port (14, 1).

Node C includes: a system control card 310, an ETH data module 320, optical ports (3, 2), and optical ports (3, 3).

Node A and Node B have 3 pairs of optical ports interconnected through third-party equipment to form three optical paths; Node A and Node C have 1 pair of optical ports interconnected to form an optical path; Node B and Node C have 1 pair of optical ports interconnected, form a light path.

The communication process between node A and node B is described below with node A as a reference node.

The communication process between Node A and Node B may include: a session establishment part and an information transmission part.

(1) Session establishment part:

The PPPoE protocol can be used to simulate a PPP connection in Ethernet, and a PPPoE session can be divided into a discovery phase and a session phase. In the discovery phase, the communication parties obtain the MAC address of the other party through negotiation, and generate the PPPoE session identifier (SESSIONID) according to the MAC address negotiated by the communication parties; in the session phase, the communication parties use the SESSION ID to uniquely identify the PPPoE session. One PPPoE session corresponds to one PPP link.

The system control card 110 of node A can use the MAC address of the ETH port of the system control card 110 and the SCC of node B to conduct PPPoE session negotiation through the standard process of establishing a PPPoE session, establish a PPPoE session, and obtain the identification of the corresponding PPPoE session (SESSION ID).

Further, because the PPPoE protocol completes the simulation of the PPP link in the Ethernet by matching the MAC addresses of the two communicating parties, it is required that the communicating parties in different PPPoE sessions have at least one MAC address that is different. Otherwise, they will be considered to belong to the same PPPoE session, and the corresponding PPP links will be the same.

The ETH port of the SCC of the transport network node is usually unique, corresponding to an actual MAC address. If node A only establishes a PPPoE session with node B, then node A can use its actual MAC address to negotiate with node B, establish a PPPoE session, and form a PPP link between node A and node B.

In order to establish a PPPoE session on each optical path of node A, multiple logical ETH ports can be further simulated on the actual ETH port of the system control card 110 of node A, so that each optical port of node A corresponds to a Logical ETH ports, and assign a logical MAC address to each logical ETH port. Each node in the transport network can use the above method to simulate a logical ETH port, and allocate a logical MAC address accordingly.

The logical MAC address can be generated by the system control card of the node according to various methods. For example, in an application scenario, since a logical ETH port corresponds to an optical port, in order to better distinguish the logical MAC address of the logical ETH port corresponding to each optical port, the node's system The control card can be generated according to the IP address of the node + the board number of the SDH line module where the optical port is located + the port number of the SDH line module where the optical port is located.

For example, in an application scenario, the IP address of node A is: 110.10.10.9, then the SCC of node A generates the logical MAC address of the logical ETH port corresponding to the optical port (1, 1) of node A can be: 110.10 .10.9.1.1. By analogy, assume that the IP address of node B is: 110.10.10.19, the IP address of node C is: 110.10.10.99, and the logical MAC address of the logical ETH port corresponding to each optical port of node A, node B, and node C can be Table 1 shows, but is not limited to:

Table 1

optical port Logical MAC address optical port Logical MAC address Optical port (1, 1) 110.10.10.9.1.1 Optical port (2, 1) 110.10.10.9.2.1 Optical port (3, 1) 110.10.10.9.3.1 Optical port (4, 1) 110.10.10.9.4.1

Optical port (11, 1) 110.10.10.19.11.1 Optical port (12, 1) 110.10.10.19.12.1 Optical port (13, 1) 110.10.10.19.13.1 Optical port (14, 1) 110.10.10.19.14.1 Optical port (3, 2) 110.10.10.99.3.2 Optical port (3, 3) 110.10.10.99.3.3

Further, optical ports and logical ETH ports can also be divided into virtual local area network domains, and the corresponding optical ports and logical ETH ports can be divided into the same domain, and the same virtual local area network identification (VLAN ID) can be assigned to realize logical ETH Ports, logical MAC addresses, VLAN IDs, and optical ports correspond to each other. The SCC of a node can generate a VLAN ID in a variety of ways. For example, in an application scenario, the SCC can use the board number of the SDH line module where the optical port is located and the port number of the optical port on the SDH line module. , to generate the VLAN ID corresponding to the optical port.

When the system control card of each node sends an Ethernet frame to the Ethernet data module, it can add the VLAN ID corresponding to the source MAC address of the Ethernet frame in the field of the Ethernet frame, and the Ethernet data module can learn the corresponding VLAN ID. Corresponding optical port information.

Specifically, the system control card 110 of node A can use the generated logical MAC address and the logical MAC address generated by the system control card 210 of node B to perform PPPoE session negotiation, and then can correspond to each optical path between node A and node B Both establish a PPPoE session, and obtain the identifier (SESSION ID) of each PPPoE session to uniquely identify the session.

The ETH data module 120 of node A can generate an optical port address comparison table, and the above optical port address comparison table can record the MAC address information of the system control card 110 of node A and the system control card 210 of node B to negotiate and establish a session, and the MAC address information of node A Receive the optical port information of the above session negotiation information. The ETH data module of node A can obtain the corresponding relationship between the optical port of node A and the session established above in the above manner.

In an application scenario, the information recorded in the optical port address comparison table generated by the ETH data module 120 of node A may include: the optical port information that node A receives the negotiation information of the above session, and the MAC address of node A corresponding to the above session Information and at least one of the MAC address information of the Node B corresponding to the above session, etc.

Similarly, the ETH data module 220 of Node B can also establish its optical port address comparison table based on the above method, and obtain the corresponding relationship between its optical ports and sessions.

For example, in an application scenario, the logical MAC address of the system control card 110 of node A for PPPoE session negotiation is 110.10.10.9.1.1, and the logical MAC address corresponds to the optical port (1, 1) of node A; The logical MAC address of the system control card 210 of the node B for PPPoE session negotiation is 110.10.10.19.11.1, and the logical MAC address corresponds to the optical port (11, 1) of the node B. After the PPPoE session is established, Node A and Node B obtain the PPPoE session ID (SESSION ID) respectively. The PPPoE session ID is generated based on the MAC addresses 110.10.10.9.1.1 and 110.10.10.19.11.1, which can be used to uniquely identify the session.

The system control card 110 of node A can negotiate with the system control card 210 of node B to establish three PPPoE sessions, which can be respectively: using the logical MAC address 110.10.10.9.1.1 corresponding to the port (1, 1) of node A and the The logical MAC address 110.10.10.19.11.1 corresponding to the port (11, 1) of Node B negotiates to establish the PPPoE session (for ease of reference, the session is referred to as: the first PPPoE session below), using the port (2 , 1) the corresponding logical MAC address 110.10.10.9.2.1 and the PPPoE session established through negotiation with the logical MAC address 110.10.10.19.12.1 corresponding to the port (12, 1) of Node B, and utilizing the port (3, 1) A PPPoE session established through negotiation between the corresponding logical MAC address 110.10.10.9.3.1 and the logical MAC address 110.10.10.19.13.1 corresponding to the port (13, 1) of Node B. By adopting the above method, each optical path of node A and node B can be negotiated to establish a PPPoE session, that is, three PPP links can be established between node A and node B.

By analogy, the system control card 110 of node A and the system control card 310 of node C can negotiate to establish a PPPoE session, that is, use the logical MAC address 110.10.10.9 corresponding to the optical port (4, 1) of node A .4.1 Negotiate and establish a PPPoE session with the logical MAC address 110.10.10.99.3.2 corresponding to the optical port (3, 2) of node C. The system control card 210 of node B and the system control card 310 of node C can also negotiate a PPPoE session, that is: use the logical MAC address 110.10.10.19.14.1 corresponding to the optical port (14, 1) of node B and the The logical MAC address 110.10.10.99.3.3 corresponding to the optical port (3, 3) of node C negotiates and establishes a PPPoE session.

Through the establishment process of the above session, each node can learn the logical MAC address of the peer node, and the corresponding relationship between the logical MAC address and the optical port, and generate a corresponding optical port address comparison table.

For example, after the above-mentioned PPPoE session is established, the optical port address comparison table generated by the ETH data module 120 of node A may be as shown in Table 2, but is not limited thereto:

Table 2

optical port source MAC address Destination MAC address Optical port (1, 1) 110.10.10.9.1.1 110.10.10.19.11.1

Optical port (2, 1) 110.10.10.9.2.1 110.10.10.19.12.1 Optical port (3, 1) 110.10.10.9.3.1 110.10.10.19.13.1 Optical port (4, 1) 110.10.10.9.4.1 110.10.10.99.3.2

As shown in Table 2, when the ETH data module 120 of node A receives the Ethernet frame sent by the system control card 110, the ETH data module 120 can determine the out the corresponding optical port.

(2) Information transmission part:

Taking node A sending information to node B based on the above-mentioned first PPPoE session as an example, the data processing process of node A's system control card 110 and ETH data module 120 will be introduced below.

The processing procedure of the system control card 110 of node A may be as follows:

The system control card 110 encapsulates the control information and/or management information to be transmitted into an Internet Protocol (IP, Internet Protocol) message;

The foregoing control information and/or management information may be received by node A and sent by other nodes, or may be generated by node A itself. The control information includes at least ASON signaling information, and the management information includes at least one of the following information: node alarm information and gateway configuration information.

The system control card 110 encapsulates the above-mentioned Internet protocol message into a point-to-point protocol frame;

The system control card 110 encapsulates the above-mentioned point-to-point protocol frame into an Ethernet point-to-point protocol frame, and the above-mentioned Ethernet point-to-point protocol frame carries the identification (SESSION ID) of the first PPPoE session;

The system control card 110 encapsulates the Ethernet point-to-point protocol frame into an Ethernet frame, and sends the Ethernet frame to the ETH data module 120 connected thereto.

The source MAC address carried by the above Ethernet frame is: 110.10.10.9.1.1, the destination MAC address is: 110.10.10.19.11.1, and may also carry the VLAN ID corresponding to the above source MAC.

The source MAC address and the destination MAC address carried in the above Ethernet frame correspond to the above first PPPoE session.

The processing procedure of the Ethernet data module 120 of node A can be as follows:

The Ethernet data module 120 receives the Ethernet frame sent by the system control card 110;

The aforementioned Ethernet frame carries control information and/or management information and an identifier of the first PPPoE session;

The Ethernet data module 120 learns at least one of the following information by parsing the received Ethernet frame: the source MAC address carried by the above-mentioned Ethernet frame, the destination MAC address carried by the above-mentioned Ethernet frame, the VLAN ID carried by the above-mentioned Ethernet frame, etc. .

Since the Ethernet data module 120 obtained the corresponding relationship between the first PPPoE session and the optical port (1, 1), when the Ethernet data module 120 parses the above-mentioned Ethernet frame and obtains the MAC address information carried by the above-mentioned Ethernet frame, Then the corresponding optical port (1, 1) can be determined according to the above MAC address information.

If the above-mentioned Ethernet frame carries a VLAN ID, the Ethernet data module 120 can strip and remove the VLAN ID carried by the Ethernet frame.

The Ethernet data module 120 maps the aforementioned Ethernet frame to the payload area of the transport network frame, and sends the aforementioned transport network frame to the optical port corresponding to the aforementioned PPPoE session.

The aforementioned transport network frame may be an SDH frame, or an OTN frame, or other forms of transport network frame.

The Ethernet data module 120 can first map the Ethernet frame into a general procedure mapping frame (GFP frame), then map the GFP frame to the payload area of the transport network frame, and send the transport network frame to the optical port corresponding to the PPPoE session. frame.

After the corresponding SDH line module receives the above transport network frame, it sends it to the node B through the corresponding optical path. For third-party devices, the services carried in the payload area of transport network frames are transparently transmitted. Therefore, control information and/or management information can pass through third-party devices and reach node B, which greatly reduces the risk of communication between nodes.

The control information and/or management information to be transmitted is packaged into Ethernet services for transmission, and the transmission bandwidth can be flexibly scheduled according to service requirements to meet the transmission bandwidth requirements.

Correspondingly, the following takes Node B receiving information sent by Node A based on the above-mentioned first PPPoE session as an example to introduce the data processing process of Node B's ETH data module 220 and system control card 210 .

The processing procedure of the Ethernet data module 220 of Node B may be as follows:

The Ethernet data module 220 receives the transmission network frame sent by node A from the corresponding optical port (11, 1);

The Ethernet data module 220 demaps the received transport network frame to obtain an Ethernet frame carrying control information and/or management information;

The Ethernet data module 220 sends the aforementioned Ethernet frame to the system control card 210 .

The processing procedure of the system control card 210 of the node B may be as follows:

The system control card 210 receives the Ethernet frame carrying control information and/or management information sent by the Ethernet data module 220;

System control card 210 resolves above-mentioned Ethernet frame into Ethernet point-to-point protocol frame, and above-mentioned Ethernet point-to-point protocol frame carries the mark (SESSION ID) of the first PPPoE session;

The system control card 210 resolves the above-mentioned Ethernet point-to-point protocol frame into a point-to-point protocol frame;

The system control card 210 parses the above-mentioned point-to-point protocol frame into an Internet protocol message;

The system control card 210 parses the above-mentioned Internet protocol message to obtain control information and/or management information.

Through the above process, it is possible to transmit control information and/or management information between nodes in the manner of transmitting Ethernet services.

The above is described by taking node A sending information to node B through the first PPPoE session as an example. Of course, node A may also send information to node B or node C through other sessions established by it.

It can be understood that the above process is described by taking node A sending information to node B as an example. Of course, node B or node C can also use the same method to send information to node A, and node A can use the same method. way to receive and process information sent by Node B or Node C.

It can be seen from the above technical solution that in this embodiment, the control information and/or management information to be transmitted is packaged into Ethernet services, and an Ethernet point-to-point protocol session is established between nodes in the transmission network to realize an Ethernet point-to-point chain Road simulation, based on simulated Ethernet point-to-point links, transmits control information and/or management information between nodes, which can not only meet the bandwidth requirements of transmitting control information and/or management information, but also reduce the risk of communication docking between devices , to meet its reliability requirements.

Further, the communication parties can simulate and generate multiple logical MCA addresses, use the generated multiple logical MAC addresses for session negotiation, and establish multiple Ethernet point-to-point protocol sessions between two nodes to form multiple PPP links. The reliability and flexibility of information transmission can be further improved.

Embodiment three,

A system control module, referring to FIG. 4 , is a schematic structural diagram of a system control module in Embodiment 3 of the present invention. The system control module in this embodiment may include:

The session establishment unit 410 is configured to establish an Ethernet point-to-point protocol session and obtain an identifier of the Ethernet point-to-point protocol session, and the Ethernet point-to-point protocol session is established between the second node and the first node where the system control module is located.

Specifically, the session establishing unit 410 may use the MAC address to initiate session negotiation with the second node, and then establish an Ethernet point-to-point protocol session between the first node and the second node, form a PPP link, and obtain the second node information such as the MAC address of the user and the identification of the above session.

The Internet protocol unit 420 is configured to encapsulate the control information and/or management information to be transmitted into an Internet protocol message.

Wherein, the control information and/or management information encapsulated by the Internet protocol unit 420 may be received by the first node and sent by other nodes, or may be generated by the first node itself. The control information includes at least ASON signaling information, and the management information includes at least one of the following information: node alarm information and gateway configuration information.

The point-to-point protocol unit 430 is configured to encapsulate the above-mentioned Internet protocol message into a point-to-point protocol frame.

The Ethernet point-to-point protocol unit 440 is configured to encapsulate the above-mentioned point-to-point protocol frame into an Ethernet point-to-point protocol frame, and the above-mentioned Ethernet point-to-point protocol frame carries the above-mentioned Ethernet point-to-point protocol session identifier.

The Ethernet sending unit 450 is configured to encapsulate the Ethernet point-to-point protocol frame into an Ethernet frame, and send the Ethernet frame to the Ethernet data module connected thereto.

In an application scenario, the above-mentioned Ethernet sending unit 450 may send the above-mentioned Ethernet frame to an Ethernet service module having an Ethernet service processing capability on the first node through an Ethernet port. The above-mentioned Ethernet service module can map the received Ethernet frame to the payload area of the transport network frame, and send the above-mentioned transport network frame to the second node through the optical port corresponding to the above-mentioned Ethernet point-to-point protocol session.

Further, the above-mentioned system control module may also include:

The address generating unit 460 is configured to generate one or more logical MAC addresses.

In an application scenario, in order to establish multiple PPPoE sessions between the first node and the second node, the address generation unit 460 can simulate multiple logical ETH ports on the actual ETH port of the system control module of the first node , so that each optical port of the first node corresponds to a logical ETH port, and assigns a logical MAC address to each logical ETH port.

The address generation unit 460 may specifically generate the address in various ways. For example, in an application scenario, since a logical ETH port corresponds to an optical port, therefore, for better distinction, the logical MAC address of the logical ETH port corresponding to each optical port, the address generating unit 460 may generate a logical MAC address according to the IP address of the first node + the board number of the SDH line module to which the optical port belongs + the port number of the SDH line module where the optical port is located.

The session establishing unit 410 may specifically be configured to use the one or more logical MAC addresses generated by the address generating unit 460 to establish one or more Ethernet point-to-point protocol sessions corresponding to the above logical MAC addresses, and obtain the above one or more Ethernet The identifier of the Point-to-Point Protocol session.

If the point-to-point protocol session is established based on the logical MAC address, the source MAC address carried in the Ethernet frame encapsulated by the Ethernet sending unit 450 is the logical MAC address of the first node corresponding to the above-mentioned point-to-point protocol session, and the Ethernet sending unit 450 The destination MAC address carried in the encapsulated Ethernet frame is the MAC address of the second node corresponding to the aforementioned point-to-point protocol session.

Further, the above-mentioned system control module may also include:

The identifier generation unit 470 is configured to generate one or more virtual local area network identifiers corresponding to each logical MAC address generated by the address generation unit 460 .

The Ethernet frame encapsulated by the Ethernet sending unit 450 may also carry a virtual local area network identifier corresponding to the source MAC address.

It can be understood that the system control module described in this embodiment is a module with a system control function in a transport network node. For example, in an application scenario, the system control module described in this embodiment may be as in the embodiment The SCC described in the second, the functions described in the various modules of the system control module can be specifically implemented according to the method described in the second embodiment, and the implementation process can refer to the relevant description in the second embodiment.

Embodiment four,

A control module, referring to FIG. 5 , is a schematic structural diagram of a control module according to Embodiment 4 of the present invention. The control module of this embodiment may include:

The session establishment unit 510 is configured to establish an Ethernet point-to-point protocol session and obtain an identifier of the Ethernet point-to-point protocol session, and the above-mentioned Ethernet point-to-point protocol session is established between the first node and the second node where the system control module is located.

Specifically, the session establishment unit 510 may use the MAC address to conduct session negotiation with the target node, and then establish an Ethernet point-to-point protocol session between the first node and the second node, form a PPP link, and obtain the MAC address of the first node. Information such as address and session identifier.

The receiving unit 520 is configured to receive an Ethernet frame, where the Ethernet frame carries control information and/or management information, and the identifier of the Ethernet point-to-point protocol session.

In one application scenario, the Ethernet service module with Ethernet service processing capability in the second node receives the transmission network frame from the optical port, obtains the Ethernet frame carried by it by demapping the transmission network frame, and converts the above The Ethernet frame is sent to the system control module of the second node. The receiving unit 520 may receive the aforementioned Ethernet frame from the Ethernet port of the system control module of the second node.

The Ethernet frame parsing unit 530 is configured to parse the Ethernet frame received by the receiving unit 520 into an Ethernet point-to-point protocol frame.

The Ethernet point-to-point protocol frame analysis unit 540 is configured to analyze the Ethernet point-to-point protocol frame analyzed by the Ethernet frame analysis unit 530 into a point-to-point protocol frame.

The point-to-point protocol frame analysis unit 550 is configured to analyze the point-to-point protocol frame analyzed by the Ethernet point-to-point protocol frame analysis unit 540 into an Internet protocol message.

The Internet protocol message analysis unit 560 is configured to analyze the Internet protocol message analyzed by the point-to-point protocol frame analysis unit 550 to obtain control information and/or management information.

It can be understood that the system control module described in this embodiment is a module with a system control function in a transport network node. For example, in an application scenario, the system control module described in this embodiment may be as in the embodiment The SCC described in the second, the functions described in the various modules of the system control module can be specifically implemented according to the method described in the second embodiment, and the implementation process can refer to the relevant description in the second embodiment.

Embodiment five,

An Ethernet service module, referring to FIG. 6, is a schematic structural diagram of an Ethernet service module according to Embodiment 5 of the present invention. The Ethernet service module of this embodiment may include:

The information obtaining unit 610 is configured to obtain the corresponding relationship between the optical port of the first node where the Ethernet service module is located and the Ethernet point-to-point protocol session, and the above-mentioned Ethernet point-to-point protocol session is established between the first node and the second node

In an application scenario, the relationship obtaining unit 610 of the Ethernet service module of the first node can generate an optical port address comparison table, and the above optical port address comparison table can record the system control module of the first node and the system control module of the second node The MAC address information for establishing the session is negotiated, and the optical port information for receiving the negotiation information of the session by the first node. The obtaining unit 610 of the first node may obtain the corresponding relationship between the optical port of the first node and the above established session in the above manner.

In one application scenario, the information recorded in the optical port address comparison table generated by the relationship obtaining unit 610 of the first node may include: the optical port information of the first node receiving the negotiation information of the above session, and the first node corresponding to the above session at least one of the MAC address information of the above session and the MAC address information of the second node corresponding to the session.

The first receiving unit 620 is configured to receive an Ethernet frame carrying control information and/or management information, and the above-mentioned Ethernet P2P session identifier.

Wherein, the source MAC address carried by the Ethernet frame is the MAC address of the first node corresponding to the Ethernet point-to-point protocol session, and the destination MAC address carried by the Ethernet frame is the second node corresponding to the Ethernet point-to-point protocol session MAC address.

The first sending unit 630 is configured to map the Ethernet frame to the payload area of the transport network frame, and send the transport network frame to the optical port corresponding to the Ethernet point-to-point protocol session.

Further, the above Ethernet service modules may also include:

The second receiving unit 640 is configured to receive the transmission network frame from the optical port of the first node.

Specifically, the second receiving module 640 may receive the transmission network frame from the optical port of the SDH line module of the first node through the cross-connect board.

The demapping unit 650 is configured to demap the transport network frame received by the second receiving module 640 to obtain an Ethernet frame carrying control information and/or management information.

The second sending unit 660 is configured to send the aforementioned Ethernet frame carrying control information and/or management information to the system control module of the first node.

It can be understood that the Ethernet service module described in this embodiment is a module capable of processing Ethernet services in a transport network node. For example, in an application scenario, the Ethernet service module described in this embodiment can It is the ETH data module as described in Embodiment 2, the system control module described in this embodiment can be the SCC as described in Embodiment 2, and the functions described in each module of the Ethernet service module can be according to Embodiment 2 The method is specifically implemented, and the implementation process may refer to the relevant description in the second embodiment.

Embodiment six,

A transport network node, referring to FIG. 7 , is a schematic structural diagram of a transport network node according to Embodiment 6 of the present invention. The transport network node is connected to another transport network node in a communicable manner. The transport network node may include:

The system control module 710 is used to establish an Ethernet point-to-point protocol session and obtain the identifier of the above-mentioned Ethernet point-to-point protocol session. The above-mentioned Ethernet point-to-point protocol session is established between another transport network node and the above-mentioned transport network node; the control to be transmitted Encapsulating information and/or management information into an Internet protocol message; encapsulating the above-mentioned Internet protocol message into a point-to-point protocol frame; encapsulating the above-mentioned point-to-point protocol frame into an Ethernet point-to-point protocol frame, and the above-mentioned Ethernet point-to-point protocol frame carries the above-mentioned Ethernet point-to-point protocol The identification of the session; encapsulating the above Ethernet point-to-point protocol frame into an Ethernet frame, and sending the above Ethernet frame.

The Ethernet service module 720 is used to obtain the corresponding relationship between the optical port of the above-mentioned transmission network node and the Ethernet point-to-point protocol session established by the system control module 710; receive the Ethernet frame sent by the system control module 710; map the above-mentioned Ethernet frame to transmitting the payload area of the network frame, and sending the transmission network frame to the optical port corresponding to the Ethernet point-to-point protocol session.

The optical port 730 is configured to send the aforementioned transport network frame to the aforementioned another transport network node.

The above-mentioned optical port 730 is located on a line module capable of transmitting and receiving optical signals of the above-mentioned network node, for example, it may be located on the SDH line module as described in the second embodiment.

The above-mentioned Ethernet service module 720 may also be used to receive the transport network frame from the optical port of the above-mentioned network node; demap the above-mentioned transport network frame to obtain an Ethernet frame carrying control information and/or management information; The system control module 710 sends the aforementioned Ethernet frame carrying control information and/or management information.

The above-mentioned system control module 710 can also be used for receiving the Ethernet frame sent by the Ethernet service module 720, the above-mentioned Ethernet frame carrying control information and/or management information, and the identifier of the Ethernet point-to-point protocol session; The frame is parsed into an Ethernet point-to-point protocol frame; the above-mentioned Ethernet point-to-point protocol frame is parsed into a point-to-point protocol frame; the above-mentioned point-to-point protocol frame is parsed into an Internet protocol message; the above-mentioned Internet protocol message is parsed to obtain control information and/or management information.

It can be understood that the system control module 710 described in this embodiment may be the system control module described in Embodiments 3 and 4; the Ethernet service function 720 described in this embodiment may be as described in Embodiment 5 Ethernet service module.

It can be understood that the functions described in each module of the transport network node described in this embodiment can be specifically implemented according to the method described in Embodiment 2, and the implementation process can refer to the relevant description in Embodiment 2.

Correspondingly, an embodiment of the present invention further provides a communication system, where the communication system includes several transmission network nodes as described in Embodiment 6.

It should be noted that for the foregoing method embodiments, for the sake of simple description, they are expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence. Because of the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the foregoing embodiments, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

To sum up, in the technical solution adopted in the embodiment of the present invention, the control information and/or management information to be transmitted are packaged into Ethernet services, and Ethernet point-to-point protocol sessions are established between nodes in the transmission network to realize Ethernet Point-to-point link simulation, based on simulated Ethernet point-to-point links, transmits control information and/or management information between nodes, which can not only meet the bandwidth requirements of transmitting control information and/or management information, but also reduce the communication between devices The risk of docking meets its reliability requirements.

Further, the communication parties can simulate and generate multiple logical MCA addresses, use the generated multiple logical MAC addresses for session negotiation, and establish multiple Ethernet point-to-point protocol sessions between two nodes to form multiple PPP links. The reliability and flexibility of information transmission can be further improved.

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the storage medium can include: ROM, RAM, disk or CD, etc.

The implementation method, module and transmission network node of a kind of information transmission provided by the embodiment of the present invention have been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The description of the above embodiment is only It is used to help understand the method of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, this The content of the description should not be construed as limiting the present invention.

Claims (9)

1. the implementation method that information transmits, is characterized in that, comprising:

First node is set up the Point-to-Point Protocol over Ethernet session between Section Point, obtains the corresponding relation of the mark of described Point-to-Point Protocol over Ethernet session and the optical port of described first node and described Point-to-Point Protocol over Ethernet session;

Control information to be transmitted and/or management information are packaged into internetwork protocol message;

Described internetwork protocol message is packaged into point-to-point protocol frame;

Described point-to-point protocol frame is packaged into Point-to-Point Protocol over Ethernet frame, and described Point-to-Point Protocol over Ethernet frame carries the mark of described Point-to-Point Protocol over Ethernet session;

Described Point-to-Point Protocol over Ethernet frame is packaged into ethernet frame;

Described ethernet frame is mapped to the payload section of transport network frame, and sends described transport network frame by the optical port corresponding with described Point-to-Point Protocol over Ethernet session to described Section Point;

Wherein, described method also comprises:

Described first node generates one or more media access control MAC Address;

Described first node is set up the Point-to-Point Protocol over Ethernet session between Section Point, obtains the corresponding relation of the mark of described Point-to-Point Protocol over Ethernet session and the optical port of described first node and described Point-to-Point Protocol over Ethernet session, specifically comprises:

Described first node utilizes one or more logic MAC Address of described generation, set up the one or more Point-to-Point Protocol over Ethernet sessions corresponding with described logic MAC Address between Section Point, obtain the corresponding relation of the mark of described one or more Point-to-Point Protocol over Ethernet sessions and the optical port of described one or more Point-to-Point Protocol over Ethernet sessions and described first node.

2. the implementation method that information according to claim 1 transmits, it is characterized in that, described corresponding relation at least comprises the one of following corresponding relation: the MAC Address of described first node that the MAC Address of described Section Point that described one or more Point-to-Point Protocol over Ethernet sessions are corresponding and the corresponding relation of the optical port of described first node, described one or more Point-to-Point Protocol over Ethernet sessions are corresponding and the corresponding relation of the optical port of described first node.

3. the implementation method that information transmits, is characterized in that, comprising:

System control module is set up Point-to-Point Protocol over Ethernet session, obtain the mark of described Point-to-Point Protocol over Ethernet session, described Point-to-Point Protocol over Ethernet session establishment is between Section Point and the first node at described system control module place, wherein, the optical port of described first node and described Point-to-Point Protocol over Ethernet session have corresponding relation;

Control information to be transmitted and/or management information are packaged into internetwork protocol message;

Described internetwork protocol message is packaged into point-to-point protocol frame;

Described point-to-point protocol frame is packaged into Point-to-Point Protocol over Ethernet frame, and described Point-to-Point Protocol over Ethernet frame carries the mark of described Point-to-Point Protocol over Ethernet session;

Described Point-to-Point Protocol over Ethernet frame is packaged into ethernet frame, and send described ethernet frame, so that the Ethernet service module in described first node obtains the optical port of described first node and the corresponding relation of Point-to-Point Protocol over Ethernet session, receive the ethernet frame that described system control module sends, described ethernet frame is mapped to the payload section of transport network frame, and sends described transport network frame to the optical port corresponding with described Point-to-Point Protocol over Ethernet session;

Wherein, described method also comprises: described system control module generates one or more logic MAC Address;

Described system control module is set up Point-to-Point Protocol over Ethernet session, obtains the mark of described Point-to-Point Protocol over Ethernet session, specifically comprises:

Described system control module utilizes one or more logic MAC Address of described generation, sets up the one or more Point-to-Point Protocol over Ethernet sessions corresponding with described logic MAC Address, obtains the mark of described one or more Point-to-Point Protocol over Ethernet sessions.

4. the implementation method that information transmits, is characterized in that, comprising:

Ethernet service module obtains the optical port of first node and the corresponding relation of Point-to-Point Protocol over Ethernet session at its place, described Point-to-Point Protocol over Ethernet session establishment is between described first node and Section Point, wherein, described Point-to-Point Protocol over Ethernet session logic-based MAC Address consults to set up;

The ethernet frame of control information and/or management information, described Point-to-Point Protocol over Ethernet session identification is carried in reception;

Described ethernet frame is mapped to the payload section of transport network frame, and sends described transport network frame to the optical port corresponding with described Point-to-Point Protocol over Ethernet session.

5. the implementation method that information according to claim 4 transmits, is characterized in that, described method also comprises:

Receive transport network frame from the optical port of described first node;

Transport network frame described in demapping, obtains the ethernet frame that carries control information and/or management information;

Described in sending to the system control module of described first node, carry the ethernet frame of control information and/or management information.

6. a system control module, is characterized in that, comprising:

Session establishment unit, be used for setting up Point-to-Point Protocol over Ethernet session, obtain the mark of described Point-to-Point Protocol over Ethernet session, described Point-to-Point Protocol over Ethernet session establishment is between Section Point and the first node at described system control module place, wherein, the optical port of described first node and described Point-to-Point Protocol over Ethernet session have corresponding relation;

Internet protocol unit, for being packaged into internetwork protocol message by control information to be transmitted and/or management information;

Point-to-point protocol unit, for being packaged into point-to-point protocol frame by described internetwork protocol message;

Point-to-Point Protocol over Ethernet unit, for described point-to-point protocol frame is packaged into Point-to-Point Protocol over Ethernet frame, described Point-to-Point Protocol over Ethernet frame carries the mark of described Point-to-Point Protocol over Ethernet session;

Ethernet transmitting element, for described Point-to-Point Protocol over Ethernet frame is packaged into ethernet frame, and send described ethernet frame, so that the Ethernet service module in described first node obtains the optical port of described first node and the corresponding relation of Point-to-Point Protocol over Ethernet session, receive the ethernet frame that described system control module sends; Described ethernet frame is mapped to the payload section of transport network frame, and sends described transport network frame to the optical port corresponding with described Point-to-Point Protocol over Ethernet session;

Wherein, described system control module also comprises:

Scalar/vector, for generating one or more logic MAC Address;

Described session establishment unit specifically for, one or more logic MAC Address of utilizing described scalar/vector to generate, set up the one or more Point-to-Point Protocol over Ethernet sessions corresponding with described logic MAC Address, obtain the mark of described one or more Point-to-Point Protocol over Ethernet sessions.

7. an Ethernet service module, is characterized in that, comprising:

Information acquisition unit, for obtaining the optical port of first node and the corresponding relation of Point-to-Point Protocol over Ethernet session at Ethernet service module place, described Point-to-Point Protocol over Ethernet session establishment is between described first node and Section Point, wherein, described Point-to-Point Protocol over Ethernet session logic-based MAC Address consults to set up;

The first receiving element, for receiving the ethernet frame that carries control information and/or management information, described Point-to-Point Protocol over Ethernet session identification;

The first transmitting element, for described ethernet frame being mapped to the payload section of transport network frame, and sends described transport network frame to the optical port corresponding with described Point-to-Point Protocol over Ethernet session.

8. Ethernet service module according to claim 7, is characterized in that, described Ethernet service module also comprises:

The second receiving element, receives transport network frame for the optical port from described first node;

Demapping unit, for transport network frame described in demapping, obtains the ethernet frame that carries control information and/or management information;

The second sending module, for carrying the ethernet frame of control information and/or management information described in the system control module transmission to described first node.

9. a transport network node, described transport network node, is characterized in that by being connected by communication mode with another transport network node, described transport network node comprises:

System control module, for setting up Point-to-Point Protocol over Ethernet session, obtains the mark of described Point-to-Point Protocol over Ethernet session, and described Point-to-Point Protocol over Ethernet session establishment is between described another transport network node and described transport network node; Control information to be transmitted and/or management information are packaged into internetwork protocol message; Described internetwork protocol message is packaged into point-to-point protocol frame; Described point-to-point protocol frame is packaged into Point-to-Point Protocol over Ethernet frame, and described Point-to-Point Protocol over Ethernet frame carries the mark of described Point-to-Point Protocol over Ethernet session; Described Point-to-Point Protocol over Ethernet frame is packaged into ethernet frame, and sends described ethernet frame;

Ethernet service module, for obtaining the optical port of described transport network node and the corresponding relation of the Point-to-Point Protocol over Ethernet session that described system control module is set up; Receive the ethernet frame that described system control module sends; Described ethernet frame is mapped to the payload section of transport network frame, and sends described transport network frame to the optical port corresponding with described Point-to-Point Protocol over Ethernet session;

Optical port, for sending described transport network frame to described another transport network node;

Wherein, described in state system control module also for, generate one or more logic MAC Address;

Describedly set up Point-to-Point Protocol over Ethernet session, obtain the mark of described Point-to-Point Protocol over Ethernet session, comprise: one or more logic MAC Address of utilizing described generation, set up the one or more Point-to-Point Protocol over Ethernet sessions corresponding with described logic MAC Address, obtain the mark of described one or more Point-to-Point Protocol over Ethernet sessions.