A DCN implementation method based on a fusion optical transmission device

Abstract

The present application relates to the technical field of computer network, and specifically relates to a DCN implementation method based on fusion optical transmission equipment, which comprises the following steps: directly transmitting various data messages of upper layer application on optical links of packet transmission technology system; using data management bytes of SDH STM-N frame OAM overhead part to realize the transmission of various data messages of upper layer application on optical links of SDH technology system; using general communication channels in OTUk\ODUk\OPUk three-level overhead to realize the transmission of various data messages of upper layer application on optical links of OTN technology system; and the upper layer application uniformly processes the data message receiving and sending of all protocol ports through the DCN channel, so that the DCN implementation method can realize that the upper layer application does not need to perceive the technology system used by the link layer optical channel, and the DCN management message is transmitted without difference, so as to realize the intelligent planning, routing re-optimization and other functions of the SDN controller on the service bearing path of the optical fiber link of different systems.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of computer network, and particularly relates to a DCN implementation method based on fusion optical transmission equipment. BACKGROUND

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

[0003] The fusion transmission equipment unifies the optical channels of three technical systems of packet transmission, SDH and OTN for unified transmission, greatly expands the application scenarios of the equipment, can meet the service transmission requirements of users for different transmission system optical, and greatly reduces the operation cost and maintenance cost of the equipment. SUMMARY

[0004] The purpose of the present application is to provide a DCN implementation method based on fusion optical transmission equipment, aiming to realize the intelligent planning of the service bearing path of the optical fiber link of different systems by the SDN controller and the route re-optimization function.

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

[0006] On the optical link of the packet transmission technical system, various data messages of upper layer applications are directly transmitted;

[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 applications;

[0008] On the optical link of the OTN technical system, the general 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 applications;

[0009] The upper layer applications uniformly process the data message transmission and reception of all protocol ports through the DCN channel.

[0010] Among them, various data messages of the optical link transmission of the three technical systems of packet transmission, SDH and OTN all include various protocol messages commonly used in Ethernet layer 2 and Ethernet layer 3, and the data messages of the network topology information collection, service configuration and network situation reporting of the SDN controller.

[0011] The DCN channel control message is operated on the optical transmission equipment fused with three technical systems of packet transmission, SDH and OTN according to networking requirements, and realizes automatic allocation of IP addresses at two ends of optical links of different technical systems, automatic reporting of topologies, transmission of SDN controller configuration messages and network situation management messages.

[0012] The optical packet transmission network differentially transmits service messages and DCN protocol messages, and the service messages and DCN protocol messages are respectively processed in the unified switching chip, and are respectively filled into the payload and overhead data section of the OTN / SDH data frame by the FPGA software before optical channel transmission, and then are transmitted to the opposite end equipment through the optical link.

[0013] The MUX PORT technology of the unified switching chip, the VLAN processing technology of the two-layer switch and the VLAN processing of the FPGA software are cooperated with each other to virtually process the optical interfaces of different technical systems, and realize the upper layer protocol to process the protocol messages received by the optical interfaces of different technical systems without sensing.

[0014] The DCN implementation method based on the fused optical transmission equipment directly transmits various data messages of the upper layer application on the optical link of the packet transmission technical system, uses the data management bytes of the OAM overhead part of the SDH STM-N frame to realize the transmission of the various data messages of the upper layer application on the optical link of the SDH technical system, and uses the general communication channel in the three-level overhead of the OTUk\ODUk\OPUk to realize the transmission of the various data messages of the upper layer application on the optical link of the OTN technical system. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

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

[0017] Figure 2 It is a schematic diagram of fusion networking of fusion optical transmission equipment.

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

[0019] Embodiments of the application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the application, and cannot be understood as a limitation of the application.

[0020] Please refer to Figures 1 to 3 The application provides a DCN implementation method based on fusion optical transmission equipment, comprising the following steps:

[0021] S1 directly transmitting various data messages of upper layer applications on optical links of packet transmission technology system;

[0022] In the embodiment of the application, when the upper layer application sends a management protocol message through a DCN channel, if an Ethernet channel of packet transmission is selected, the upper layer protocol sends a protocol message through a specific physical interface, and the protocol message is directly sent to a unified switching chip bottom layer SDK to form a standard Ethernet frame, which is sent to a peer device through an Ethernet optical channel of packet transmission.

[0023] S2 transmitting various data messages of the upper layer applications using data management bytes of an OAM overhead part of an SDH STM-N frame on optical links of an SDH technology system;

[0024] In the embodiment of the application, when the upper layer application sends a management protocol message through a DCN channel, if an SDH channel is selected, the upper layer protocol sends a protocol message through a virtual physical interface, and the protocol message is directly sent to a unified switching chip bottom layer SDK, and a corresponding VLAN tag is added to the protocol message according to a MUX PORT mapping relationship, the protocol message with the corresponding VLAN id is sent to a main control board two-layer switching chip through a MUX port of the unified switching chip, and the protocol message with the VLAN id is output from a PORT6 port of the two-layer switch to FPGA software of an SDH board, and the FPGA software strips the VLAN tag and then fills the protocol message into DCC bytes of an overhead of an STM-N frame, and the protocol message is sent to a peer SDH device through STM-1 / 4 / 16 optical channels 1 to 6.

[0025] Wherein, the DCN protocol message is processed by the SDH board optical channel transceiver processing flow:

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

[0027] Sending data from the optical link: the upper layer application software of the main control board selects to send the DCN protocol message from the virtual physical port SDH-X-1-6, and the unified switching chip SDK maps the virtual physical port into the corresponding VLAN id, and then sends the DCN protocol message with the corresponding VLAN id to the main control board two-layer switch PORT2 port, and then outputs the protocol message with the VLAN id from the two-layer switch PORT6 port to the FPGA software of the SDH board, and then the FPGA software strips the VLAN tag and fills the protocol message into the DCC byte of the STM-N frame overhead, and then sends it to the opposite SDH device through the STM-1 / 4 / 16 optical 1-6 channel.

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

[0029] In the embodiment of the application, 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, and directly issues the protocol message to the unified switching chip SDK, and according to the MUX PORT mapping relationship, the protocol message is marked with the corresponding VLAN tag, and the management protocol message with the corresponding VLAN id is sent to the main control board two-layer switching chip through the MUX port of the unified switching chip, and then forwarded to the OTN board two-layer switching chip through the inter-board channel, and then output to the FPGA of the corresponding optical link after stripping the VLAN tag, and then the FPGA fills the protocol message into the GCC byte of the OTN frame overhead, and then sends it to the opposite OTN device.

[0030] Wherein, the DCN protocol message is processed by the SDH board optical channel transceiver processing flow:

[0031] Receive data from optical link: the FPGA of the OTN board extracts DCN data in the 4 OTN optical channel overheads, according to the planned VLAN tag, the extracted DCN message is marked with the corresponding VLAN tag, and is forwarded to the two-layer switch chip of the main control board through the two-layer switch 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 switch chip of the main control board. The unified switch chip enables the MUX PORT function, and can virtually output different panel interfaces according to the VLAN id, so as to virtually output the panel interfaces of the 4 optical ports of the OTN board in the unified switch chip of the main control board. The upper layer protocol processes the protocol message received by the corresponding virtual interface according to the normal physical interface.

[0032] Send data from optical link: the upper layer protocol sends the protocol message through the physical interface. The unified switch chip marks the protocol message with the corresponding VLAN tag through the MUX PORT mapping relationship, forwards it to the OTN two-layer switch chip through the two-layer switch chip of the main control board, and outputs it to the FPGA of the corresponding optical link after stripping the VLAN tag. The FPGA fills the protocol message into the GCC byte of the OTN frame overhead and sends it to the opposite OTN device.

[0033] S4 The upper layer application processes all protocol port data messages through the DCN channel.

[0034] In the embodiment of the application, when the upper layer application receives the management protocol message through the DCN channel, it does not need to be differentiated according to the different technical systems of the link layer optical channel, and processes all the received protocol messages of the ports uniformly. The process is as follows:

[0035] Receive data from the OTN board optical link: the FPGA of the OTN board extracts DCN data in the 4 OTN optical channel overheads, according to the planned VLAN tag, the extracted DCN message is marked with the corresponding VLAN tag, and is forwarded to the two-layer switch chip of the main control board through the two-layer switch 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 switch chip of the main control board (CTC7132). The unified switch chip enables the MUX PORT function, and can virtually output different panel interfaces according to the VLAN id, so as to virtually output the panel interfaces of the 4 optical ports of the OTN board in the unified switch chip of the main control board. The upper layer protocol processes the protocol message received by the corresponding virtual interface according to the normal physical interface.

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

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

[0038] Table 1 VLAN planning table of the two-layer switching chip of the main control board

[0039] VLAN Id Port No. Description 301 PORT2(T), PORT3(T) First GCC optical channel of the OTN board 302 PORT2(T), PORT3(T) Second GCC optical channel of the OTN board 303 PORT2(T), PORT3(T) Third GCC optical channel of the OTN board 304 PORT2(T), PORT3(T) Fourth GCC optical channel of the OTN board 601 PORT2(T), PORT6(T) First DCC optical channel of the SDH board 602 PORT2(T), PORT6(T) Second DCC optical channel of the SDH board 603 PORT2(T), PORT6(T) Third DCC optical channel of the SDH board 604 PORT2(T), PORT6(T) Fourth DCC optical channel of the SDH board 605 PORT2(T), PORT6(T) Fifth DCC optical channel of the SDH board 606 PORT2(T), PORT6(T) Sixth DCC optical channel of the SDH board

[0040] Table 2 VLAN planning table of the two-layer switching chip of the OTN board

[0041] VLAN Id Port No. Description 301 PORT14(T), PORT8(U) First GCC optical channel of the OTN board 302 PORT14(T), PORT9(U) Second GCC optical channel of the OTN board 303 PORT14(T), PORT10(U) Third GCC optical channel of the OTN board 304 PORT14(T), PORT11(U) Fourth GCC optical channel of the OTN board

[0042] The above only discloses a preferred embodiment of the DCN implementation method based on the fusion optical transmission equipment of the present application, of course, cannot limit the scope of the present application, and those skilled in the art can understand that the above-mentioned embodiment can realize all or part of the process, and the equivalent changes made according to the claims of the present application still belong to the scope covered by the present application.

Claims

1. A DCN implementation method based on a converged optical transmission device, characterized in that, Comprise the following steps: On the optical link of packet transmission technology system, directly transmit various data packets of upper layer application, specifically, when the upper layer application sends management protocol packets through DCN channel, if the selected is Ethernet channel of packet transmission, the upper layer protocol sends protocol packets through specific physical interface, directly issues protocol packets to unified switching chip bottom layer SDK, forms standard Ethernet frame, and then sends to peer device through Ethernet optical channel of packet transmission; On the optical link of SDH technology system, use data management bytes of SDH STM-N frame OAM overhead part to realize transmission of various data packets of upper layer application; On the optical link of OTN technology system, use general communication channel in OTUk\ODUk\OPUk three-level overhead to realize transmission of various data packets of upper layer application; The DCN channel control packet runs on optical transmission equipment of three technology systems integration of packet transmission, SDH and OTN according to networking requirements, realizes automatic allocation of IP addresses of two ends of optical link of different technology systems, automatic reporting of topology, transmission of SDN controller configuration packet and network situation management packet; The upper layer application processes data packet receiving and sending of all protocol ports through DCN channel; In the packet transmission network, transmit service packet and DCN protocol packet without difference, in OTN system optical network and SDH system optical network, service packet and DCN protocol packet are processed in unified switching chip respectively, before optical channel transmission, service packet and DCN management packet are filled in payload and overhead data section of OTN / SDH data frame by FPGA software, and then the data is sent to peer device through optical link.

2. The DCN implementation method based on integrated optical transmission equipment according to claim 1, wherein, The MUX PORT technology of unified switching chip, VLAN processing technology of two-layer switch and VLAN processing of FPGA software cooperate with each other, virtually process optical interfaces of different technology systems, and realize that upper layer protocol processes protocol packets received by optical interfaces of different technology systems without sensing.

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