CN-122027651-A - Intelligent rail multi-line wired transmission interconnection fusion method and system

CN122027651ACN 122027651 ACN122027651 ACN 122027651ACN-122027651-A

Abstract

The invention provides an intelligent rail multi-line wired transmission interconnection fusion method and system, relates to the technical field of urban rail transit and communication, and solves the problem of the limitation of complex interconnection management of the current intelligent rail multi-line. The method comprises the steps of receiving Ethernet data frames from an intelligent track self-built optical fiber ring network side, carrying out data conversion based on a preset mapping table, including virtual local area network identification mapping, internet protocol address prefix mapping, adding line identification and vehicle identification in data load, selecting a target link from a plurality of available physical links based on link quality evaluation results of the plurality of available physical links, and sending the Ethernet data frames subjected to data conversion to an intelligent track public network bearing side through the target link. The invention realizes the wired seamless interconnection between two network architectures, can uniformly process various intelligent rail service labels, stably performs cross-line interaction, and improves the communication reliability in a multi-line through operation scene.

Inventors

GUO XIANJUN
WU TI
LUO TING
LIU GANG
Zhan Chongshu
YU RUNZE
Fu Hongyin
Tang Zichuan
LI KANGKANG
TIAN YE

Assignees

四川蜀道轨道交通集团有限责任公司
四川川南轨道交通运营有限公司

Dates

Publication Date: 20260512
Application Date: 20260206

Claims (10)

1. The intelligent rail multi-line wired transmission interconnection fusion method is characterized by comprising the following steps of: S1, receiving an Ethernet data frame from an intelligent rail self-built optical fiber ring network side; s2, carrying out data conversion on the Ethernet data frame based on a preset mapping table, wherein the data conversion at least comprises virtual local area network identification mapping, internet protocol address prefix mapping and adding a line identification and a vehicle identification into a data load; s3, selecting a target link from a plurality of available physical links based on link quality evaluation results of the available physical links; And S4, transmitting the Ethernet data frame subjected to data conversion to the intelligent rail public network bearing side through the target link.
2. The intelligent track multi-line wire transmission interconnection fusion method according to claim 1, wherein in step S2, the preset mapping table comprises at least one of a virtual local area network mapping table, an Internet protocol address prefix mapping table, a service class and service quality policy mapping table, and a line number and vehicle number encoding table.
3. The intelligent rail multi-line wire transmission interconnection fusion method of claim 2, wherein the source VLAN identification in the Ethernet data frame is mapped to a target VLAN identification or sub-interface identification according to the VLAN mapping table; Mapping a source internet protocol address prefix in the ethernet data frame to a target internet protocol address prefix according to the internet protocol address prefix mapping table; and adding the corresponding line number field and the corresponding vehicle number field into the load data of the Ethernet data frame according to the line number and the vehicle number coding table.
4. The intelligent rail multi-line wired transmission interconnection fusion method according to claim 1 is characterized in that in step S3, a target link is selected based on a link quality evaluation result, and specifically comprises the steps of periodically collecting link quality parameters of each physical link, wherein the link quality parameters at least comprise packet loss rate, time delay and error rate, calculating comprehensive scores of each physical link based on preset weight coefficients according to the packet loss rate, the time delay and the error rate, and selecting a physical link with the optimal comprehensive scores as the target link.
5. The intelligent rail multi-line wired transmission interconnection fusion method of claim 4, wherein the physical link with the optimal comprehensive score is used as a main link, and when the comprehensive score of the main link meets a preset switching threshold in a periodical calculation process, switching the service to the physical link with the suboptimal comprehensive score in a preset switching time, and updating the physical link with the suboptimal comprehensive score into a new main link.
6. An intelligent rail multi-line wired transmission interconnection fusion system for implementing the method of any one of claims 1-5, comprising the following functional modules: The self-built ring network access module is used for receiving Ethernet data frames from the intelligent rail self-built optical fiber ring network side; The cross-network data conversion module is used for carrying out data conversion on the Ethernet data frames based on a preset mapping table, wherein the data conversion at least comprises virtual local area network identification mapping, internet protocol address prefix mapping and adding line identification and vehicle identification into a data load; A link selection module, configured to select a target link from a plurality of available physical links based on a link quality evaluation result of the plurality of available physical links; and the public network access module is used for transmitting the Ethernet data frames subjected to data conversion to the intelligent rail public network bearing side through the target link.
7. The intelligent track multi-line wire transmission interconnection fusion system according to claim 6, wherein the cross-network data conversion module comprises a programmable switch chip or a programmable logic device and a memory connected with the programmable switch chip or the programmable logic device, wherein the memory stores the preset mapping table comprising at least one of a virtual local area network mapping table, an Internet protocol address prefix mapping table, a traffic class and service quality strategy mapping table and a line number and vehicle number encoding table.
8. The intelligent rail multi-line wired transmission interconnection fusion system according to claim 6, wherein the link selection module comprises a link detection unit and a switching control unit, the link detection unit is used for periodically collecting link quality parameters of each physical link, the link quality parameters at least comprise packet loss rate, time delay and error rate, and the switching control unit is used for calculating the comprehensive score of each physical link according to the packet loss rate, the time delay and the error rate based on preset weight coefficients and selecting the physical link with the optimal comprehensive score as the target link.
9. The intelligent rail multi-line wired transmission interconnection fusion system according to claim 6, wherein the self-built ring network access module and the public network access module are respectively provided with at least two tera-mega optical interfaces and/or kilomega electrical interfaces.
10. The intelligent rail multi-line wired transmission interconnection fusion system according to claim 6, wherein the intelligent rail multi-line wired transmission interconnection fusion system is realized by a cabinet device, the cabinet device comprises a cabinet body, a back board interconnection board arranged in the cabinet body, a main control board card, a cross-network data conversion module, a link selection module, a self-built ring network access module and a public network access module, wherein the main control board card, the cross-network data conversion module, the link selection module, the self-built ring network access module and the public network access module are connected with the back board interconnection board in a plugging mode respectively, the back board interconnection board provides a power bus, a management bus and a high-speed data bus for all components plugged on the back board interconnection board, and the main control board card is simultaneously connected with the cross-network data conversion module, the link selection module, the self-built ring network access module and the public network access module through the management bus and the high-speed data bus and is used for carrying out unified configuration and state acquisition instruction issuing and data return.

Description

Intelligent rail multi-line wired transmission interconnection fusion method and system Technical Field The invention relates to the technical field of urban rail transit and communication, in particular to an intelligent rail multi-line wired transmission interconnection fusion method and system. Background The development of the technical field of urban rail transit communication and signals, in particular to the network operation of an intelligent track express system (ART), and provides new requirements for interconnection and fusion of communication transmission networks. As a plurality of lines of the system are put into operation successively, a line network structure covering different areas of a city is gradually formed, and different lines often adopt different wired transmission bearing modes due to different construction periods, technical selection and resource conditions. Some early or independently constructed lines tend to adopt self-built optical fiber cable transmission systems to construct high-speed looped networks with control centers as cores for carrying various key services such as signal control, passenger information systems, broadcasting, intersection priority and the like. And the subsequently constructed line is possibly more dependent on private line resources of a public network operator and a metropolitan area bearing network, and is connected with an operator sink node through site access equipment, so that traffic flows such as vehicle-mounted video monitoring, passenger information service, wireless scheduling and the like are accessed to a cloud or unified comprehensive management platform. Under the background of multi-line through operation and integrated scheduling management, stable and reliable interconnection between a self-built optical fiber transmission ring network and a bearing system depending on a public network becomes an urgent need in actual engineering. The common interconnection mode at present is to add high-speed optical ports on core switching equipment of two types of networks in a control center or a key node machine room for direct optical fiber connection, and then complete basic service intercommunication across networks by virtual local area network division, static or dynamic route configuration on the switches. However, this approach has gradually revealed several drawbacks in practice. The self-built network and the public network bearing system generally have significant differences in address planning, virtual local area network partitioning strategy, service quality guarantee mechanism and the like. The simple direct connection of the equipment causes that interconnection configuration is distributed on a plurality of independent network equipment, so that the debugging process is complicated, the later maintenance is complex, and connectivity faults are easily caused by inconsistent configuration. The method is also limited in the link redundancy design, and can only realize limited link aggregation or single backup at the switch side, so that the availability of a plurality of private lines and self-built optical fibers of operators cannot be comprehensively considered, and a systematic evaluation and quick switching mechanism for the quality of the fused links is lacking. Aiming at the characteristics of intelligent track multi-line operation, the conventional method does not uniformly identify and process characteristic information such as line identification, vehicle number, service type and the like at a transmission layer, and related requirements are required to be respectively adapted and improved by an upper application system, so that higher function expansion cost and implementation complexity are brought. There are also currently some communication devices or integrated access system schemes that employ modular structural designs. For example, a communication device with a chassis back plate matched with various functional plug-ins is adopted, so that the problems of unified access and networking of multi-system equipment in an industrial field are solved, or the contradiction of different wired access modes in network deployment is relieved through a wired integrated access system combined by a near-end device and a far-end device. Although the schemes have certain flexibility and integration level, the design initially and application scenes are mainly oriented to electric power, general industry or common access networks, and the architecture design is not specially performed aiming at the deep interconnection requirement between the self-built optical fiber ring network and the public network bearing network in the intelligent track multi-line scene. And particularly, a modularized interconnection structure which is oriented to unified processing of business labels of through operation and active management of link quality across heterogeneous networks and is convenient for subsequent line expansion is lacking. Therefore,