Unified service switching method based on fusion optical transmission equipment

Abstract

The invention relates to the technical field of computer networks, in particular to a unified service exchange method based on fusion optical transmission equipment, which comprises the following steps that: an Ethernet interface board, an SDH (Synchronous Digital Hierarchy) interface board and an OTN (Optical Transport Network) interface board transmit service data to a unified exchange board; and the unified exchange board carries out unified exchange on the service data from the interface boards of different technical systems. According to the invention, a unified switching method for realizing services on optical transmission equipment with different fused technical systems is realized, the method comprises Ethernet packet transmission, SDH (Synchronous Digital Hierarchy) and OTN (Optical Transport Network) services, the Ethernet packet transmission and the SDH services are realized by switching MPLS (Multi-Protocol Label Switching) labels, and the OTN services are realized by mapping OTU2 time slots through VLAN (Virtual Local Area Network) tags. By means of the unified exchange chip, unified exchange of packet transmission, SDH and OTN data can be achieved, the service data transmission scene requirement under the fusion optical networking environment is met, and therefore the problem that an existing exchange method cannot meet the service data transmission scene requirement under the fusion optical networking environment is solved.

Description

Technical Field

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

[0002] Converged transmission equipment integrates the optical channels of three technical systems, packet transmission (such as Ethernet packet transmission), SDH (Synchronous Digital Hierarchy), and OTN (Optical Transport Network) for unified transmission. This integration greatly expands the application scenarios of the equipment, enabling it to meet users' business transmission needs for optical transmission of different transmission systems, while greatly reducing the operating and maintenance costs of the equipment.

[0003] However, achieving unified exchange of services on converged optical transmission equipment is a technical challenge because different technical systems have different data formats and transmission methods. Summary of the invention

[0004] The purpose of the present invention is to provide a unified service switching method based on a fused optical transmission device, aiming to solve the problem that the existing switching method cannot meet the requirements of service data transmission scenarios in a fused optical networking environment.

[0005] To achieve the above object, the present invention provides a unified service switching method based on a fused optical transmission device, comprising the following steps:

[0006] The unified switching board generates the corresponding switching chip forwarding table according to the business planning configuration;

[0007] The Ethernet interface board, the SDH interface board and the OTN interface board process the data frames of different transmission systems accordingly to obtain standard Ethernet packet messages, and transmit the standard Ethernet packet messages to the unified switching board after adding MPLS labels and VLAN IDs;

[0008] The unified switching board checks the MPLS label or VLAN ID encapsulated in the standard Ethernet message, and forwards the service data based on the forwarding table.

[0009] Among them, in "the unified switching board generates corresponding switching chip forwarding according to the service planning configuration", the unified switching board has an Ethernet switching chip, and the service data of each service board is uniformly exchanged by searching the Ethernet switching chip forwarding table.

[0010] Among them, in "after the Ethernet interface board, SDH interface board and OTN interface board process the data frames of different transmission systems accordingly, standard Ethernet packet messages are obtained, and MPLS labels and VLAN IDs are added based on the standard Ethernet packet messages and then transmitted to the unified switching board", for Ethernet IP messages and SDH packets, they are first encapsulated into MPLS messages.

[0011] Among them, in "after the Ethernet interface board, SDH interface board and OTN interface board process the data frames of different transmission systems accordingly, standard Ethernet packet messages are obtained, and MPLS labels and VLAN IDs are added based on the standard Ethernet packet messages and then transmitted to the unified switching board", for OTN packet cutting, the VLAN tag of the unified switching board is passed.

[0012] Among them, in "the unified switching board checks the MPLS label or VLAN ID encapsulated in the standard Ethernet message, and forwards the service data based on the forwarding table", the forwarding is performed by mapping the OTU2 time slot through the VLAN ID to forward the service and forwarding the service according to the label.

[0013] The present invention provides a unified service switching method based on a fused optical transmission device, comprising the following steps: a unified switching board generates a corresponding switching chip forwarding table according to the service planning configuration; an Ethernet interface board, an SDH interface board and an OTN interface board process data frames of different transmission systems accordingly to obtain standard Ethernet packet messages, and transmit the standard Ethernet packet messages to the unified switching board after adding MPLS labels and VLAN IDs; the unified switching board checks the MPLS labels or VLAN IDs encapsulated in the standard Ethernet messages, and forwards the service data based on the forwarding table. The present invention implements a unified service switching method on optical transmission devices that integrate different technical systems, including Ethernet packet transmission, SDH, and OTN services, wherein Ethernet packet transmission and SDH services are implemented by exchanging MPLS labels, and OTN services are implemented by mapping VLAN tags to OTU2 time slots. The unified switching chip can realize the unified switching of packet transmission, SDH, and OTN data, meeting the service data transmission scenario requirements in a fused optical networking environment, thereby solving the problem that the existing switching method cannot meet the service data transmission scenario requirements in a fused optical networking environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] Figure 1 This is a diagram of the interconnection interface of the boards of the fusion transmission equipment.

[0016] Figure 2 It is a schematic diagram of unified service exchange of converged transmission equipment.

[0017] Figure 3 It is a flow chart of a unified service switching method based on fused optical transmission equipment provided by the present invention. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figures 1 to 3 The present invention provides a unified service switching method based on a fusion optical transmission device, comprising the following steps:

[0020] The S1 unified switch board generates the corresponding switch chip forwarding table according to the business planning configuration;

[0021] The unified switching board is provided with an Ethernet switching chip, and the service data of each service board is uniformly exchanged through the Ethernet switching chip.

[0022] Specifically, the unified switching chip on the unified switching board generates a corresponding switching chip forwarding table according to the business planning configuration issued by the superior business planning unit. Ethernet packet transmission and SDH data frame slicing realize the exchange of business data in the unified switching chip by exchanging MPLS labels. OTN data frame slicing realizes the exchange of business data in the unified switching chip by exchanging MPLS labels. The SDN controller collects data packets such as network topology information collection, business configuration, and network status reporting. Packet transmission, SDH, and OTN converged transmission services can be uniformly managed through a unified business planning platform. The SDN controller can uniformly manage and plan optical links of different systems.

[0023] The S2 Ethernet interface board, the SDH interface board and the OTN interface board process the data frames of different transmission systems accordingly to obtain standard Ethernet packet messages, and transmit the standard Ethernet packet messages to the unified switching board after adding MPLS labels and VLAN IDs;

[0024] For Ethernet IP messages and SDH packets, they are first encapsulated into MPLS messages.

[0025] For OTN packet cutting, VLAN tags are passed through the unified switching board.

[0026] Specifically, the integrated optical transmission equipment and all interface board data are exchanged in a unified switching board, and Ethernet services are interoperated with MPLS equipment: user service traffic is input from the GE / FE user-side interface of the Ethernet interface board, sent to the unified switching board via the MUX PORT, and encapsulated into a packet message with a specific MPLS label according to the AC port matching rule and the binding relationship with the next hop. It is transmitted from the corresponding 10GE Ethernet interface to other Ethernet forwarding devices that support MPLS. The process of receiving service traffic from the opposite MPLS device is the opposite.

[0027] Intercommunication of Ethernet services with OTN equipment: User service traffic is input from the GE / FE user-side interface and sent to the unified switching board through the Ethernet interface board MUX PORT. The message is marked with the corresponding VLAN TAG and sent to the OTN interface board. The OTN interface board maps the message to the corresponding OTU2 time slot according to the VLAN ID of the message and transmits it to other OTN equipment through the interconnected OTN optical interface. The process of receiving service traffic from the opposite end OTN equipment is the opposite.

[0028] Intercommunication of Ethernet services with SDH equipment: User service traffic is input from the GE / FE user-side interface, encapsulated into SDH frames and then sliced. The slices are sent to the unified switching board as standard Layer 2 Ethernet messages, encapsulated into MPLS packet messages and then sent to the SDH interface board through label switching. The SDH interface board maps the MPLS label of the message to the VC4 container corresponding to the SDH optical interface on the corresponding line side, and transmits it to other SDH equipment through the interconnected SDH optical interface. The process of receiving service traffic from the opposite end SDH equipment is the opposite.

[0029] Intercommunication of low-speed SDH services with multiple SDH nodes: The upstream service traffic is input from the STM1 / 4 / 16 interface on the user side, sliced ​​by the SDH interface board and sent to the unified switching board. The unified switching board forwards it to the low-order cross-connect module according to the MPLS label. After the low-order cross-connect is completed, the unified switching board switches it to the SDH interface board according to the MPLS label. The SDH interface board maps the MPLS label of the message to the VC4 container corresponding to the SDH optical interface on the corresponding line side, and transmits it to other SDH devices through the interconnected SDH optical interface. The process of receiving service traffic from the opposite end SDH device is the opposite.

[0030] Intercommunication with SDH equipment Intercommunication of SDH services: The upstream service traffic is input from the STM1 / 4 / 16 interface on the user side, sliced ​​by the SDH interface board and sent to the unified switching board. The unified switching board forwards it to the low-order cross-connect module according to the MPLS label. After completing the low-order cross-connect, the unified switching board switches it to the SDH interface board according to the MPLS label. The SDH interface board maps the MPLS label of the message to the VC4 container corresponding to the SDH optical interface on the corresponding line side, and transmits it to other SDH equipment through the interconnected SDH optical interface. The process of receiving service traffic from the opposite SDH equipment is the opposite.

[0031] Intercommunication of SDH services with OTN equipment: Upstream service traffic is input from the STM1 / 4 / 16 interface on the user side, sliced ​​by the SDH interface board and sent to the unified switching board, which switches it to the OTN interface board according to the MPLS label. The OTN interface board maps the MPLS label of the message to the time slot corresponding to the OTU2 optical interface on the corresponding line side, and transmits it to other OTN equipment through the interconnected OTN optical interface. The process of receiving service traffic from the opposite end SDH equipment is the opposite.

[0032] Intercommunication of OTU1 / OTU2 services with OTN equipment: The upstream service traffic is input from the OTU1 / OTU2 interface on the tributary side. The OTN interface board slices the traffic and sends it to the unified switching board. The unified switching board switches the message to the OTN interface board according to the VLAN ID of the mapped time slot. The OTN interface board maps the VLAN ID of the message to the time slot corresponding to the OTU2 optical interface on the corresponding line side. The traffic is transmitted to other OTN equipment by the interconnected OTN optical interface. The process of receiving service traffic from the opposite end SDH equipment is the opposite.

[0033] The unified switching board in S3 checks the MPLS label or VLAN ID encapsulated in the standard Ethernet message, and forwards the service data based on the forwarding table.

[0034] The forwarding is performed by mapping the VLAN ID to the OTU2 time slot to perform the service forwarding behavior and forwarding the service according to the label

[0035] Specifically, SDH services and MPLS-based Ethernet services forward services through labels, while OTN services forward services by mapping VLAN IDs to OTU2 time slots.

[0036] What is disclosed above is only a preferred embodiment of the unified service switching method based on integrated 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 the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A unified service switching method based on fused optical transmission equipment, characterized in that: The following steps are involved: The unified switching board generates the corresponding switching chip forwarding table according to the business planning configuration; The Ethernet interface board, the SDH interface board and the OTN interface board process the data frames of different transmission systems accordingly to obtain standard Ethernet packet messages, and transmit the standard Ethernet packet messages to the unified switching board after adding MPLS labels and VLAN IDs; The unified switching board checks the MPLS label or VLAN ID encapsulated in the standard Ethernet message, and forwards the service data based on the forwarding table.

2. The service unified switching method based on the fusion optical transmission equipment according to claim 1, characterized in that: In "the unified switching board generates corresponding switching chip forwarding according to the business planning configuration", the unified switching board has an Ethernet switching chip, and the business data of each business board is uniformly exchanged by searching the Ethernet switching chip forwarding table.

3. The service unified switching method based on the fusion optical transmission equipment according to claim 2, characterized in that: In "After the Ethernet interface board, SDH interface board and OTN interface board process the data frames of different transmission systems accordingly, standard Ethernet packet messages are obtained, and MPLS labels and VLAN IDs are added based on the standard Ethernet packet messages and then transmitted to the unified switching board", for Ethernet IP messages and SDH packets, they are first encapsulated into MPLS messages.

4. The service unified switching method based on the fusion optical transmission equipment according to claim 3 is characterized in that: In "After the Ethernet interface board, SDH interface board and OTN interface board process the data frames of different transmission systems accordingly, standard Ethernet packet messages are obtained, and MPLS labels and VLAN IDs are added based on the standard Ethernet packet messages and then transmitted to the unified switching board", for OTN packet cutting, the VLAN tag of the unified switching board is passed.

5. The service unified switching method based on fused optical transmission equipment according to claim 1, characterized in that: In "the unified switching board checks the MPLS label or VLAN ID encapsulated in the standard Ethernet message, and forwards the service data based on the forwarding table", the forwarding performs service forwarding behavior by mapping the OTU2 time slot through the VLAN ID and forwarding the service according to the label.

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