DCN (Data Communication Network) implementation method based on fusion optical transmission equipment

Abstract

The invention relates to the technical field of computer networks, in particular to a DCN (Data Communication Network) implementation method based on fusion optical transmission equipment, which comprises the following steps of: directly transmitting various data messages of an upper layer application on an optical link of a packet transmission technology system; on an optical link of an SDH technical system, data management bytes of an OAM overhead part of an SDH STM-N frame are used, and transmission of various data messages of an upper layer application is achieved; on an optical link of an OTN technology system, a general communication channel in OTUkODUkOPUk three-level overhead is used, and transmission of various data messages of an upper layer application is achieved; an upper-layer application uniformly processes data message receiving and transmitting of all protocol ports through a DCN channel, and the DCN implementation method can realize that the upper-layer application does not need to perceive a technical system used by a link layer optical channel and transmits a DCN management message without difference. Therefore, the SDN controller can carry out intelligent planning, route re-optimization and other functions of a service bearing path on optical fiber links of different systems.

Description

Technical Field

[0001] The present invention relates to the technical field of computer networks, and in particular to a DCN implementation method based on fused optical transmission equipment. Background Art

[0002] DCN (Data Communication Network) provides communication channels for centralized management of network elements to achieve remote management and maintenance of network elements. It can combine current advanced technologies and equipment to build an efficient and reliable DCN network.

[0003] Converged transmission equipment integrates the optical channels of three technical systems, namely packet transmission, SDH and OTN, for unified transmission, which greatly expands the application scenarios of the equipment, can meet users' business transmission needs for optical transmission of different transmission systems, and greatly reduce equipment operation and maintenance costs. Summary of the invention

[0004] The purpose of the present invention is to provide a DCN implementation method based on fused optical transmission equipment, aiming to realize the intelligent planning and route re-optimization functions of the SDN controller for service bearing paths of optical fiber links of different systems.

[0005] To achieve the above object, the present invention provides a DCN implementation method based on fusion optical transmission equipment, comprising the following steps:

[0006] Directly transmit various data messages of upper layer applications on the optical link of packet transmission technology system;

[0007] On the optical link of the SDH technical system, the data management bytes of the OAM overhead part of the SDH STM-N frame are used to realize the transmission of various data messages of the upper layer application;

[0008] On the optical link of the OTN technology system, the universal communication channel in the three-level overhead of OTUk\ODUk\OPUk is used to realize the transmission of various data messages of the upper layer application;

[0009] The upper layer application uniformly processes the sending and receiving of data messages of all protocol ports through the DCN channel.

[0010] Among them, various data messages transmitted by optical links of the three technical systems of packet transmission, SDH and OTN include various protocol messages commonly used in Ethernet Layer 2 and Ethernet Layer 3, and SDN controller full network topology information collection, service configuration and network status reporting data messages.

[0011] Among them, the DCN channel control message runs on the optical transmission equipment that integrates the three technical systems of packet transmission, SDH and OTN according to the networking requirements, realizing the automatic allocation of IP addresses at both ends of optical links of different technical systems, automatic reporting of topology, and transmission of SDN controller configuration messages and network status management messages.

[0012] Among them, the optical packet transmission network transmits service messages and DCN protocol messages indiscriminately. In the OTN optical network and SDH optical network, service messages and DCN protocol messages are processed separately in a unified switching chip. Before optical channel transmission, the FPGA software fills the service messages and DCN management messages into the payload and overhead data segments in the OTN / SDH data frame respectively, and then sends the data to the opposite device through the optical link.

[0013] Among them, the MUX PORT technology of the unified switching chip, the VLAN processing technology of the second-layer switch and the VLAN processing of the FPGA software cooperate with each other to virtually process the optical interfaces of different technical systems, so as to realize the upper-layer protocol to process the protocol messages received by the optical interfaces of different technical systems without perception.

[0014] The invention discloses a DCN implementation method based on a fusion optical transmission device. On an optical link of a packet transmission technology system, various data messages of upper-layer applications are directly transmitted; on an optical link of an SDH technology system, data management bytes of an SDH STM-N frame OAM overhead part are used to realize transmission of various data messages of upper-layer applications; on an optical link of an OTN technology system, universal communication channels in three-level overheads of OTUk, ODUk and OPUk are used to realize transmission of various data messages of upper-layer applications; the upper-layer application uniformly processes the sending and receiving of data messages of all protocol ports through a DCN channel. The DCN implementation method can automatically allocate IP addresses on interconnected optical interfaces of optical links of different systems, automatically report optical link information of different systems, etc., thereby realizing unified management of the topology of a fusion transmission network, realizing that the upper-layer application does not need to perceive the technology system used by the link layer optical channel, and indiscriminately transmits DCN management messages, thereby realizing functions such as intelligent planning of service bearing paths and route re-optimization of optical fiber links of different systems by an SDN controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1It is a schematic diagram of protocol message processing of converged optical transmission equipment.

[0017] Figure 2 This is a schematic diagram of the integrated networking of integrated optical transmission equipment.

[0018] Figure 3 It is a flow chart of a DCN implementation method based on fused optical transmission equipment provided by the present invention. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0020] See also Figures 1 to 3 The present invention provides a DCN implementation method based on a fusion optical transmission device, comprising the following steps:

[0021] S1 directly transmits various data messages of upper layer applications on the optical link of packet transmission technology system;

[0022] In the embodiment of the present invention, when the upper-layer application sends a management protocol message through the DCN channel, if the Ethernet channel for packet transmission is selected, the upper-layer protocol sends the protocol message through a specific physical interface, and sends the protocol message directly to the underlying SDK of the unified switching chip to form a standard Ethernet frame and send it to the opposite device through the Ethernet optical channel for packet transmission.

[0023] S2 uses the data management bytes of the OAM overhead part of the SDH STM-N frame on the optical link of the SDH technical system to realize the transmission of various data messages of the upper layer application;

[0024] In the embodiment of the present invention, when the upper layer application sends the management protocol message through the DCN channel, if the SDH channel is selected, the upper layer protocol sends the protocol message through the virtual physical interface, directly sends the protocol message to the underlying SDK of the unified switching chip, adds the corresponding VLAN tag to the protocol message according to the MUX PORT mapping relationship, sends the management protocol message with the corresponding VLAN id to the layer 2 switching chip of the main control board through the MUX port of the unified switching chip, and outputs the protocol message with the VLAN id from the PORT6 port of the layer 2 switch to the FPGA software of the SDH board. After stripping the VLAN tag, the FPGA software fills the protocol message into the DCC byte of the STM-N frame overhead and sends it to the opposite end SDH device through the STM-1 / 4 / 16 optical 1 to 6 channels.

[0025] The DCN protocol message is sent and received through the SDH board optical channel:

[0026] Receiving data from the optical link: The FPGA of the SDH board extracts the DCN protocol message from the DCC bytes of the STM-N frame of STM-1 / 4 / 16 optical channels 1 to 6, and marks them with VLAN ids 601 to 606 respectively. Then, the protocol message with the corresponding VLAN id enters the layer 2 switch of the main control board through PORT16 of the main control board, and then sends the protocol message with the corresponding VLAN id to the MUX PORT port of the unified switching chip of the main control board through PORT2 of the layer 2 switch. The SDK of the unified switching chip of the main control board sends the message to the corresponding virtual physical port SDH-X-1 to 6 according to the VLAN id.

[0027] Send data from the optical link: The upper-layer application software of the main control board chooses to send the DCN protocol message from the virtual physical port SDH-X-1~6. The unified switching chip bottom-layer SDK maps the virtual physical port to the corresponding VLAN id, adds the corresponding VLAN id to the DCN protocol message and sends it to the PORT2 port of the Layer 2 switch of the main control board, and outputs the protocol message with VLAN id from the PORT6 port of the Layer 2 switch to the FPGA software of the SDH board. After stripping the VLAN tag, the FPGA software fills the protocol message into the DCC byte of the STM-N frame overhead and sends it to the opposite SDH device through the STM-1 / 4 / 16 optical 1~6 channels.

[0028] S3 uses the common communication channel in the three-level overhead of OTUk\ODUk\OPUk on the optical link of the OTN technical system to realize the transmission of various data messages of the upper layer application;

[0029] In the embodiment of the present invention, when the upper-layer application sends the management protocol message through the DCN channel, if the OTN channel is selected, the upper-layer protocol sends the protocol message through the virtual physical interface, directly sends the protocol message to the underlying SDK of the unified switching chip, adds the corresponding VLAN tag to the protocol message according to the MUX PORT mapping relationship, sends the management protocol message with the corresponding VLAN id to the second-layer switching chip of the main control board through the MUX port of the unified switching chip, forwards it to the second-layer switching chip of the OTN board through the inter-board channel, strips off the VLAN tag and outputs it to the FPGA of the corresponding optical link, and the FPGA then fills the protocol message into the GCC byte of the OTN frame overhead and sends it to the opposite OTN device.

[0030] The DCN protocol message is sent and received through the OTN board optical channel:

[0031] Receiving data from the optical link: The OTN board FPGA extracts the DCN data from the 4 OTN optical channel overheads, adds the corresponding VLAN tag to the extracted DCN message according to the planned VLAN tag, and forwards it to the second-layer switching chip of the main control board through the second-layer switching chip of the OTN board. The switch chip of the main control board does not strip the VLAN tag and directly sends the DCN message with the corresponding VLAN id to the unified switching chip of the main control board. The unified switching chip enables the MUX PORT function and can virtualize different panel interfaces according to the VLAN id, thereby virtualizing the panel interfaces corresponding to the 4 optical ports of the OTN board on the unified switching chip of the main control board. The upper-layer protocol processes the protocol messages received by the corresponding virtual interface according to the normal physical interface.

[0032] Sending data from the optical link: The upper layer protocol sends the protocol message through the physical interface. The unified switching chip adds the corresponding VLAN tag to the protocol message through the MUXPORT mapping relationship, forwards it to the OTN Layer 2 switching chip through the Layer 2 switching chip of the main control board, removes the VLAN tag and outputs it to the FPGA of the corresponding optical link. The FPGA then fills the protocol message into the GCC byte of the OTN frame overhead and sends it to the opposite OTN device.

[0033] The upper layer application described in S4 uniformly processes the sending and receiving of data messages of all protocol ports through the DCN channel.

[0034] In the embodiment of the present invention, when the upper layer application receives the management protocol message through the DCN channel, it does not need to perceive the difference in the technical system of the link layer optical channel and perform differentiated processing, and uniformly processes the protocol messages received by all ports, and the process is as follows:

[0035] When receiving data from the OTN board optical link: the OTN board FPGA extracts the DCN data from the 4 OTN optical channel overheads, adds the corresponding VLAN tag to the extracted DCN message according to the planned VLAN tag, and forwards it to the second-layer switching chip of the main control board through the second-layer switching chip of the OTN board. The switch chip of the main control board does not strip the VLAN tag and directly sends the DCN message with the corresponding VLAN id to the unified switching chip (CTC7132) of the main control board. The unified switching chip enables the MUX PORT function and can virtualize different panel interfaces according to the VLANid, thereby virtualizing the panel interfaces corresponding to the 4 optical ports of the OTN board on the unified switching chip of the main control board. The upper-layer protocol processes the protocol messages received by the corresponding virtual interface according to the normal physical interface.

[0036] When receiving data from the SDH board optical link: the SDH board FPGA extracts the DCN protocol message from the STM-N frame DCC bytes of STM-1 / 4 / 16 optical channels 1 to 6, and marks them with VLAN ids 601 to 606 respectively, and then sends the protocol message with the corresponding VLAN id to the layer 2 switch of the main control board through PORT16 of the main control board, and then sends the protocol message with the corresponding VLANid to the MUX PORT port of the unified switching chip of the main control board through PORT2 of the layer 2 switch. The SDK of the unified switching chip of the main control board sends the message to the corresponding virtual physical port SDH-X-1 to 6 according to the VLAN id.

[0037] The VLAN planning of the related switching chips and FPGA in the protocol message processing block diagram is shown in Table 1 and Table 2.

[0038] Table 1 VLAN planning for the layer 2 switch chip on the main control board

[0039] VLANId Port Number illustrate 301 PORT2(T), PORT3(T) The first optical GCC channel of the OTN board 302 PORT2(T), PORT3(T) The second optical GCC channel of the OTN board 303 PORT2(T), PORT3(T) The third optical GCC channel of OTN board 304 PORT2(T), PORT3(T) The fourth optical GCC channel of the OTN board 601 PORT2(T), PORT6(T) The first optical DCC channel of SDH board 602 PORT2(T), PORT6(T) The second optical DCC channel of SDH board 603 PORT2(T), PORT6(T) The third optical DCC channel of SDH board 604 PORT2(T), PORT6(T) The fourth optical DCC channel of SDH board 605 PORT2(T), PORT6(T) The fifth optical DCC channel of SDH board 606 PORT2(T), PORT6(T) The sixth optical DCC channel of SDH board

[0040] Table 2 VLAN planning table for OTN board layer 2 switching chip

[0041] VLANId Port Number illustrate 301 PORT14(T), PORT8(U) The first optical GCC channel of the OTN board 302 PORT14(T), PORT9(U) The second optical GCC channel of the OTN board 303 PORT14(T), PORT10(U) The third optical GCC channel of OTN board 304 PORT14(T), PORT11(U) The fourth optical GCC channel of the OTN board

[0042] What is disclosed above is only a preferred embodiment of the DCN implementation method based on the fused optical transmission equipment of the present invention. Of course, it cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope covered by the invention.

Claims

1. A DCN implementation method based on fusion optical transmission equipment, characterized in that: The following steps are involved: Directly transmit various data messages of upper layer applications on the optical link of packet transmission technology system; On the optical link of the SDH technical system, the data management bytes of the OAM overhead part of the SDH STM-N frame are used to realize the transmission of various data messages of the upper layer application; On the optical link of the OTN technology system, the universal communication channel in the three-level overhead of OTUk\ODUk\OPUk is used to realize the transmission of various data messages of the upper layer application; The upper layer application uniformly processes the sending and receiving of data messages of all protocol ports through the DCN channel.

2. A DCN implementation method based on fusion optical transmission equipment according to claim 1, characterized in that: The various data messages transmitted by the optical links of the three technical systems of packet transmission, SDH and OTN include various protocol messages commonly used in Ethernet Layer 2 and Ethernet Layer 3, and data messages for SDN controller to collect network topology information, configure services and report network status.

3. A DCN implementation method based on fusion optical transmission equipment as claimed in claim 1, characterized in that: The DCN channel control message runs on the optical transmission equipment integrating the three technical systems of packet transmission, SDH and OTN according to the networking requirements, realizing the automatic allocation of IP addresses at both ends of the optical link of different technical systems, automatic reporting of topology, transmission of SDN controller configuration message and network situation management message.

4. A DCN implementation method based on fusion optical transmission equipment as claimed in claim 1, characterized in that: The optical packet transmission network transmits service messages and DCN protocol messages indiscriminately. In the OTN optical network and the SDH optical network, service messages and DCN protocol messages are processed separately in a unified switching chip. Before optical channel transmission, the FPGA software fills the service messages and DCN management messages into the payload and overhead data segments in the OTN / SDH data frame respectively, and then sends the data to the opposite device through the optical link.

5. A DCN implementation method based on fusion optical transmission equipment as claimed in claim 4, characterized in that: The MUX PORT technology of the unified switching chip, the VLAN processing technology of the layer 2 switch and the VLAN processing of the FPGA software cooperate with each other to virtually process the optical interfaces of different technical systems, so as to realize the upper layer protocol imperceptibly processing the protocol messages received by the optical interfaces of different technical systems.

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