CN100514935C - Network-unit apparatus management information transmission method and apparatus and network-unit apparatus - Google Patents

Abstract

The invention discloses a method for transmitting network element equipment management information, a corresponding transmission device, and network element equipment including the transmission device. The method of the present invention includes: encapsulating and mapping the Ethernet data packet of the management information with the EOS protocol and mapping it to a virtual channel, and sending it through the service channel; information. The network element device management information transmission device of the present invention includes: an Ethernet processing module, an encapsulation/decapsulation module, a mapping/demapping module and an SDH/SONET module. Adopting the present invention can flexibly configure the transmission bandwidth of management information, and can centrally manage transmission equipment isolated from other networks without occupying additional interfaces of network element equipment and other external data equipment, and can solve the problem of SDH/SONET transmission equipment. The problem of insufficient bandwidth of the management information channel.

Description

Network element equipment management information transmission method and device, and network element equipment

technical field

The present invention relates to a transmission network composed of synchronous digital hierarchy (Synchronous Digital Hierarchy, SDH) or synchronous optical network (Synchronous Optical Network, SONET) equipment, especially relates to the management information transmission method of SDH or SONET network element equipment, and the corresponding network The meta-device management information transfer device and the network element device including the transfer device.

Background technique

Generally speaking, the transmission network composed of SDH or SONET equipment is relatively large, and the network generally needs to be managed centrally through a few network management systems. management, but for non-gateway network elements that cannot be directly connected to the network management system, traditional SDH and SONET transmission equipment transmit management information through their overhead bytes (D1~D12 bytes), and these overhead bytes constitute data Communication channel (Data Communications Channel, DCC), this management method has been the most widely used because it has nothing to do with the business and does not even require any configuration. Most of the management information transmission of the current SDH and SONET transmission networks adopts this A DCC channel mode.

The working principle of the DCC channel mode is shown in Figure 1:

After the gateway NE (network element C in Figure 1) is set on the network, the gateway NE is directly connected to the network management system, while all other non-gateway NEs on the network (network elements A, B, D, E, F) All communicate with the network management system through the gateway network element. Gateway network elements and non-gateway network elements communicate with each other through line SDH/SONET overhead (D1-D12 bytes). This method of managing network elements through the DCC channel has two major disadvantages:

(1) The bandwidth of the DCC channel is small and fixed, with a maximum of 768Kbps. In network element management, software upgrade is a common maintenance method. The business on the current transmission equipment is constantly developing and enriching. Each unit in the network element The software scale of the network is also gradually increasing, so the time to load and upgrade the network element software through the DCC channel is also increasing, which will inevitably waste a lot of maintenance manpower;

(2) The DCC channel depends on the line SDH/SONET overhead, and this overhead cannot be transparently transmitted by the transmission equipment of another manufacturer, nor can it communicate with each other. Therefore, when the transmission equipment of one manufacturer is separated by the transmission network of another manufacturer, Then the separated transmission equipment will not be able to be managed centrally through the same network management system.

Therefore, with the integration of various services such as Ethernet and Asynchronous Transfer Mode (ATM) into SDH and SONET equipment, the configuration amount of network elements and the scale of software are constantly increasing, and the bandwidth of DCC channels has obviously become The bottleneck of network element management and maintenance leads to very low management efficiency of remote non-gateway network elements. Therefore, in the long run, the method of managing SDH and SONET equipment through DCC channels can no longer meet the needs of daily management and maintenance. In addition, due to the development of SDH and SONET transmission equipment, the joint networking of equipment from multiple manufacturers has become a common phenomenon. However, DCC channels of different manufacturers generally cannot communicate with each other, and equipment from one manufacturer cannot transparently transmit data from equipment from another manufacturer. DCC communication, so it is more difficult to manage the equipment that is scattered but cannot be directly connected to the manufacturer's equipment through the line fiber. The current solution to this problem is to manage the network elements through the Digital Data Network (DDN).

The specific method of DDN management network element is shown in Figure 2, including: connecting the network element management interface to the interface of the network element that can communicate with the data equipment through a data device (such as a router). For example, the network element management interfaces of network elements A, B, C, and D in Figure 2 are all connected to the Plesiochronous Digital Hierarchy (PDH) interface of network elements through data equipment, and then a corresponding service channel is configured to pass through The transmission network of another manufacturer transmits management information. When the transmitted management information reaches the gateway network element connected to the network management system, the management information is transmitted to the connected data device through the PDH interface of the gateway network element, and then connected to the network through the data device. network management system.

The method of centralized management of transmission network elements through DDN has the following disadvantages:

(1), network element management must rely on additional data equipment (such as routers), which is relatively expensive and difficult to control stability, because it depends on the stability of the network element itself and data equipment;

(2) It needs to occupy an additional interface of the network element equipment, which is a waste of the interface of the network element;

(3) Generally speaking, the management bandwidth is relatively small and fixed. If the management information is transmitted through the PDH interface, the management bandwidth can only be the rate that the PDH port can provide, such as 2Mbps.

Contents of the invention

The present invention provides a method for transmitting management information of network element equipment, which is used to solve the problems in the prior art that the bandwidth is limited when the network element equipment is managed or the extra interface of the network element equipment needs to be occupied and the management information can only be transmitted through external data equipment. The problem.

The present invention further provides a device for transmitting network element equipment management information corresponding to the method of the present invention and network element equipment including the transmitting device.

The present invention provides a network element device management information transmission method, which is applied to Synchronous Digital System SDH/Synchronous Optical Network SONET equipment, including:

A1. Receive the Ethernet data packet carrying the management information;

B1. Encapsulating the Ethernet data packet using the Ethernet service EOS encapsulation protocol carried by SDH/SONET;

C1. Map the encapsulated data packet to the configured virtual channel and send it through the service channel;

D1. The network element device receiving the management information demaps the data packet carrying the management information from the virtual channel;

E1. EOS decapsulating the data packet carrying the management information;

F1. Send the decapsulated Ethernet data packet to the network element device management module of the network element device that receives the management information through the Ethernet interface, and obtain corresponding management information.

The step A1 includes: receiving an Ethernet data packet carrying management information from a network management system or a local network element device management module.

The EOS encapsulation protocol includes: general framing procedure GFP protocol, link access procedure LAPS protocol or advanced data link control HDLC protocol.

The virtual channel includes concatenation or virtual concatenation of multiple channels.

The present invention provides a network element device management information transmission device, comprising: an Ethernet processing module, an encapsulation/decapsulation module, a mapping/demapping module and an SDH/SONET module;

The Ethernet processing module is connected to the network element equipment management module through an Ethernet interface, obtains an Ethernet data packet carrying management information and transmits it to the encapsulation/decapsulation module; and receives the Ethernet packet processed by the encapsulation/decapsulation module The data packet is exchanged and processed, and sent to the network element device management module by the Ethernet interface;

The encapsulation/decapsulation module adopts the EOS encapsulation protocol to encapsulate the Ethernet data packet carrying the management information; or adopts the EOS decapsulation protocol to perform EOS decapsulation on the data packet carrying the management information;

The mapping/demapping module maps the EOS-encapsulated data packet carrying management information into a virtual channel and sends it to the SDH/SONET module; or demaps the encapsulated data packet carrying management information from the virtual channel Bag;

The SDH/SONET module adds SDH/SONET overhead bytes to the virtual channel after mapping, and sends it to the cross-connect module; or receives the virtual channel service from the cross-connect module, and removes the SDH/SONET overhead byte from the virtual channel service and then sent to the mapping/demapping module.

The Ethernet processing module includes one of a private line transparent transmission processing submodule, a layer-2 switching submodule, and a layer-3 switching submodule; the Ethernet data packets are respectively transparently transmitted, layer-2 switching processing or layer-3 switching processing .

The network element equipment also provided by the present invention includes a network element equipment management module, a cross-connect module, and the above-mentioned network element equipment management information transmission device of the present invention; the Ethernet processing module in the device communicates with the network element equipment management module through an Ethernet interface The modules are connected; the Synchronous Digital Hierarchy SDH/Synchronous Optical Network SONET module in the device is connected with the cross connection module of the network element equipment.

When the network element device is used as a gateway network element, its Ethernet processing module is also connected to the network management system through an Ethernet interface.

The beneficial effects of the present invention are as follows:

(1), the present invention encapsulates the management information through the EOS protocol and maps the virtual channel, and sends it through the service channel. The transmission bandwidth can be designed with different mapping particles according to actual needs, and can also be dynamically changed by cascading and virtual cascading modes, so that It can solve the problem of too small management bandwidth and low efficiency when managing network elements through DCC or DDN.

(2), because the present invention does not adopt the DCC channel mode to transmit management information through the overhead byte, therefore, when the transmission equipment of different manufacturers is networked, the management information can be transmitted to the destination network element; like this, to the transmission network of other manufacturers Isolated transmission devices can also be managed centrally, without the need for other network devices and occupying additional network element ports, with high stability.

Description of drawings

FIG. 1 is a schematic diagram of network element equipment managed through a DCC channel in the prior art;

FIG. 2 is a schematic diagram of managing network element equipment through DDN in the prior art;

Fig. 3 is a schematic diagram of the device for transmitting network element equipment management information and its connection according to the present invention.

Detailed ways

The method for transmitting network element equipment management information provided by the invention is applied to SDH/SONET equipment, including a sending process and a receiving process. In the process of sending/receiving, according to the different positions of the network element equipment in the network, for example: the network element equipment is connected to the network management system as a gateway network element, or the network element equipment is only a pass-through network element in the transmission path, or the network element equipment is connected to the network management system. The meta-device is the destination network element of the currently transmitted management information, and it may process the received management information differently. The three situations are described below.

Situation 1. The network element device is a gateway network element, which is connected to the network management system; the method for receiving the management information sent by the network management system and transmitting it to the next network element device includes:

Step 1, the network element device receives the Ethernet data packet carrying the management information sent by the network management system; if the destination address of the Ethernet data packet carrying the management information is the network element, it is directly sent to the network element device management module; otherwise , continue to step 2;

Step 2, adopting the Ethernet service (Ethernet Over SDH/Sonet, EOS) encapsulation protocol carried on SDH/SONET by the described Ethernet packet, such as: general framing procedure (Generic Framing Procedure, GFP) agreement, link access Protocol SDH (Link Access Procedure-SDH) protocol or Advanced Data Link Control (Highlevel Data Link Control, HDLC) protocol for encapsulation;

Step 3. Map the encapsulated data packet to the configured virtual channel, and send it to the next network element device by the SDH/SONET line module of the network element device occupying the service channel through the SDH/SONET line.

Situation 2: The network element device only passes through the network element in the middle of the transmission path, receives the management information packet sent by the previous network element, and transmits it to the next network element device. The specific method process includes:

Step 1. The SDH/SONET line interface of the network element device receives the data packet carrying the management information, and transmits it to the cross-connect module inside the network element device through the SDH/SONET line module inside the local network element device;

Step 2, the cross-connection module switches the received data packet carrying the management information to the corresponding SDH/SONET line module connected to the next network element device according to the pre-configured cross-connection, and thus the SDH/SONET line module The SDH/SONET line interface transmits to the next network element device.

Situation 3: The network element device is the destination network element of the currently transmitted management information, receives the management information data packet sent by the previous network element, and unpacks and receives it locally. The specific method process includes:

Step 1. The network element device demaps the data packet carrying the management information encapsulated in the virtual channel;

Step 2, the data packet carrying the management information is decapsulated through the EOS decapsulation protocol, such as adopting GFP, LAPS, HDLC and other protocols to decapsulate;

Step 3. Send the decapsulated Ethernet data packet to the network element device management module through the Ethernet interface, and the network element device management module obtains corresponding management information.

If the network element device has local management information that needs to be transmitted to the network management system, it can be divided into the following two situations according to whether the network element device is directly connected to the network management system:

(1), the network element device is a gateway network element, and its Ethernet interface is directly connected to the network management system; in this case, the management information generated by the local network element device is passed by the network element device management module through the local network element Ethernet processing module After the exchange is processed, it is directly sent to the network management system.

(2) If the network element device is not directly connected to the network management system, the management information generated locally needs to be transmitted to the gateway network element connected to the network management system (may need to pass through one or more intermediate network elements); In this case, the management information generated by the local network element device needs to go through the following process:

Step 1, the network element device management module first encapsulates the management information generated by the local network element device into an Ethernet data packet;

Step 2, then adopt the EOS encapsulation protocol for the Ethernet data packet, such as: adopt GFP, LAPS, HDLC and other protocols to re-encapsulate;

Step 3, map the repackaged data packet to the configured virtual channel, and send the SDH/SONET line module of the local network element device to the SDH/SONET line module of the next network element device through the service channel occupied by the SDH/SONET line;

Step 4, the SDH/SONET line module of the next network element device receives the data packet carrying the management information and transmits it to the cross-connect module inside the local network element device; The data packet of the information is switched to the corresponding SDH/SONET line module connected to the next network element device, and the SDH/SONET line interface of the SDH/SONET line module is transmitted to the next network element device;

Step 5, repeat step 4, until the transmitted data packet carrying the management information arrives at the gateway network element connected to the network management system;

Step 6, the gateway network element device demaps the data packet carrying the management information in the virtual channel; then decapsulates the data packet carrying the management information using the EOS decapsulation protocol; and passes the decapsulated Ethernet data packet through The Ethernet interface sends to the network management system.

In the above method steps, the corresponding mapping particles when mapping to virtual channels can be determined when designing network element equipment, such as using VC12/VC3/VC4/VT1.5/STS-1/STS-3c and so on. After the mapping granularity of the network element equipment is determined, in order to flexibly control the transmission bandwidth, cascading or virtual cascading can be used to expand the virtual channel bandwidth for transmitting management information.

According to the above-mentioned network element equipment management information transmission method of the present invention, the present invention provides a corresponding network element equipment management information transmission device, including: Ethernet processing module, encapsulation/decapsulation module, mapping/demapping module and SDH/ SONET modules.

The transmission device of the present invention can be added (embedded) in each SDH/SONET transmission network element equipment; or the transmission device of the present invention can be connected with each SDH/SONET transmission network element equipment as an independent device.

The specific structure and connection diagram of the transmission device of the present invention are shown in FIG. 3 .

The transmission device of the present invention provides an Ethernet interface to connect with the network element equipment management module. The Ethernet processing module mainly completes the transparent transmission or Layer 2 (Layer 3) switching processing of Ethernet data packets; the specific processing methods include:

A. If the Ethernet interface of the transmission device is connected to the network management system, the Ethernet processing module receives the Ethernet data packet carrying management information sent by the network management system from the Ethernet interface. If the purpose of the Ethernet data packet carrying management information is If the address is the local network element, the received Ethernet data packet will be directly sent to the local network element device management module; otherwise, the Ethernet processing module will send it to the encapsulation/decapsulation module; in the opposite direction, the Ethernet processing module receives the Ethernet data packet carrying management information sent by the encapsulation/decapsulation module, adopts dedicated line transparent transmission or two-layer (three-layer) switching processing method, and transmits it to the network management system through the Ethernet interface ;

B. For the pass-through network element device in the middle of the network, if the local network element device management module has management information to be sent to the next network element device, the Ethernet processing module receives locally generated Ethernet data carrying management information through the Ethernet interface Packets are sent to the encapsulation/decapsulation module by private line transparent transmission or Layer 2 (Layer 3) switching processing; in the opposite direction, when the destination address is the management information of the network element received, the Ethernet processing module receives the encapsulation/decapsulation module The Ethernet data packet carrying the management information sent by the encapsulation module is transmitted through the Ethernet interface to the network element device management module of the local network element by means of dedicated line transparent transmission or layer-2 (layer-3) switching processing. The network element device management module acquires corresponding management information.

The specific processing methods of the encapsulation/decapsulation module include: receiving the Ethernet data packet sent by the Ethernet processing module, using EOS encapsulation protocol, such as GFP, LAPS, HDLC and other protocols for encapsulation; and encapsulating the encapsulated data carrying management information Send the packet to the mapping/demapping module; or receive the data packet carrying management information sent by the mapping/demapping module, use the EOS decapsulation protocol, such as GFP, LAPS, HDLC and other protocols for decapsulation, and send it to the Ethernet for processing module.

The specific processing method of the mapping/demapping module includes: mapping the packet carrying management information encapsulated by the encapsulation/decapsulation module to a pre-configured virtual channel (including cascading or virtual cascading), and then sending it to the SDH/SONET module ; or demap the encapsulated data packet carrying management information from the virtual channel.

The specific processing methods of the SDH/SONET module include: adding SDH/SONET overhead bytes to the virtual channel of the mapped data packet carrying management information, and sending it to the cross-connect module; or receiving the virtual channel service from the cross-connect module, and monitoring SDH/SONET overhead bytes and performance, if the overhead bytes do not match the predetermined value or there is a performance error in the service, an alarm will be reported, and finally the virtual channel service will be sent to the mapping/demapping module after removing the SDH/SONET overhead bytes .

The present invention also provides a network element device, including the above-mentioned device for transmitting network element device management information of the present invention. The Ethernet processing module in the transmission device is connected with the network element equipment management module through the Ethernet interface; the SDH/SONET module in the transmission device is connected with the cross connection module of the network element equipment.

When the network element device of the present invention is connected with the network management system, its Ethernet processing module receives the Ethernet data packet carrying the management information sent by the network management system through the Ethernet interface, and sequentially passes through the encapsulation/decapsulation module and the mapping/demapping module And SDH/SONET module processing, send to the cross-connection module of the network element equipment, and send the data packet carrying the management information to the next connected network element equipment through the SDH/SONET line module occupying the business channel.

When the network element device of the present invention receives the management information packet whose destination address is the network element, the mapping/demapping module in the transmission device demaps the data packet carrying the management information from the virtual channel; The encapsulation/decapsulation module adopts the EOS decapsulation protocol for the data packet carrying the management information, such as GFP, LAPS, HDLC and other protocols to decapsulate; then the Ethernet processing module in the transmission device decapsulates the decapsulated Ethernet data packet The information is sent to the network element device management module through the Ethernet interface, and the network element device management module obtains corresponding management information.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and 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 (9)

1. A method for transmitting network element equipment management information, applied to Synchronous Digital System SDH/Synchronous Optical Network SONET equipment, characterized in that it includes: A1. Receive the Ethernet data packet carrying the management information; B1. Encapsulating the Ethernet data packet using the Ethernet service EOS encapsulation protocol carried by SDH/SONET; C1. Map the encapsulated data packet to the configured virtual channel and send it through the service channel; D1. The network element device receiving the management information demaps the data packet carrying the management information from the virtual channel; E1. EOS decapsulating the data packet carrying the management information; F1. Send the decapsulated Ethernet data packet to the network element device management module of the network element device that receives the management information through the Ethernet interface, and obtain corresponding management information. 2. The method according to claim 1, wherein the step A1 comprises: receiving an Ethernet data packet carrying management information from a network management system or a local network element device management module. 3. The method according to claim 1, wherein the EOS encapsulation protocol comprises: General Framing Procedure (GFP), Link Access Procedure (LAPS), or Advanced Data Link Control (HDLC). 4. The method according to claim 1, wherein the virtual channel comprises cascade or virtual concatenation of multiple channels. 5. A device for transmitting network element equipment management information, comprising: an Ethernet processing module, an encapsulation/decapsulation module, a mapping/demapping module, and an SDH/SONET module; The Ethernet processing module is connected to the network element equipment management module through an Ethernet interface, obtains an Ethernet data packet carrying management information and transmits it to the encapsulation/decapsulation module; and receives the Ethernet packet processed by the encapsulation/decapsulation module The data packet is exchanged and processed, and is sent to the network element device management module by the Ethernet interface; The encapsulation/decapsulation module adopts the EOS encapsulation protocol to encapsulate the Ethernet data packet carrying the management information; or adopts the EOS decapsulation protocol to perform EOS decapsulation on the data packet carrying the management information; The mapping/demapping module maps the EOS-encapsulated data packet carrying management information into a virtual channel and sends it to the SDH/SONET module; or demaps the encapsulated data packet carrying management information from the virtual channel Bag; The SDH/SONET module adds SDH/SONET overhead bytes to the virtual channel after mapping, and sends it to the cross-connect module; or receives the virtual channel service from the cross-connect module, and removes the SDH/SONET overhead byte from the virtual channel service and then sent to the mapping/demapping module. 6. The device for transmitting network element equipment management information according to claim 5, wherein the Ethernet processing module includes one of a private line transparent transmission processing submodule, a Layer 2 switching submodule, and a Layer 3 switching submodule; Perform transparent transmission, Layer 2 switching processing or Layer 3 switching processing on the Ethernet data packets respectively. 7. A network element device, comprising a network element device management module and a cross-connection module, characterized in that it also includes the network element device management information transmission device according to claim 5; the Ethernet processing module in the device passes the Ethernet The network interface is connected with the network element equipment management module; the Synchronous Digital Hierarchy SDH/Synchronous Optical Network SONET module in the device is connected with the cross connection module of the network element equipment. 8. The network element device according to claim 7, wherein when the network element device is used as a gateway network element, its Ethernet processing module is also connected to the network management system through an Ethernet interface.

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