Method and system for transmitting urban co-management line data

Abstract

The invention provides a method and system for transmitting urban co-management line data, and relates to the technical field of rail transit, and the method comprises the steps: vehicle-mounted equipment receives latest operation plan information in real time; in response to the operation plan information, the vehicle-mounted equipment checks whether the currently stored line data is consistent with the operation plan information or not to obtain an evaluation result; if the evaluation result is inconsistent, the vehicle-mounted equipment initiates a line data request instruction to a corresponding data management unit; and in response to the line data request instruction, the vehicle-mounted equipment receives and obtains latest line data based on a preset vehicle-road collaborative distribution algorithm, and the latest line data is obtained by requesting and converting the data management unit from the central data management server. Through centralized management and on-demand distribution of the data, repeated storage of the line data of the whole line network on each vehicle-mounted device is avoided, and a large amount of manpower and material resources are saved.

Description

Technical Field

[0001] The present invention relates to the field of rail transit technology, and in particular to a method and system for transmitting urban area co-managed line data. Background Art

[0002] With the acceleration of urbanization, the scale and complexity of urban rail transit systems are increasing. The interconnection of multiple lines and multiple models has become a key factor in improving traffic efficiency and service quality. The rail transit system needs to be able to flexibly adjust and expand to adapt to the changing urban traffic needs. Existing rail transit systems usually adopt centralized or distributed line data storage solutions to store the line data of the entire line network in each on-board device. However, this method has many defects. First, each on-board device needs to store complete line data, resulting in repeated production and storage of the same line data on different devices, wasting a lot of manpower and material resources, and with the expansion of the scale of the line network, the demand for storage space continues to increase, which easily causes the problem of insufficient storage space; secondly, the existing storage solution cannot dynamically distribute line data according to actual needs, resulting in some on-board devices storing unnecessary line data, while the data actually required cannot be obtained in time, and cannot flexibly adapt to changes in operation plans, resulting in low line transmission efficiency.

[0003] Based on the above shortcomings of the prior art, there is an urgent need for a method and system for transmitting urban co-managed line data. Summary of the invention

[0004] The purpose of the present invention is to provide a method and system for transmitting data of a city-wide co-managed line to improve the above-mentioned problem. In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows:

[0005] In a first aspect, the present application provides a method for transmitting data on a city-wide co-managed line, comprising:

[0006] The on-board equipment receives the latest operation plan information in real time;

[0007] In response to the operation plan information, the onboard device checks whether the currently stored route data is consistent with the operation plan information to obtain an evaluation result;

[0008] If the evaluation result is inconsistent, the vehicle-mounted device initiates a line data request instruction to the corresponding data management unit;

[0009] In response to the route data request instruction, the vehicle-mounted device receives the latest route data based on a preset vehicle-road cooperative distribution algorithm, and the latest route data is requested and converted by the data management unit from the central data management server.

[0010] In a second aspect, the present application provides a system for transmitting data on a city-wide co-managed line, including:

[0011] Receiving module: the vehicle-mounted equipment receives the latest operation plan information in real time;

[0012] A checking module, in response to the operation plan information, the onboard device checks whether the currently stored route data is consistent with the operation plan information to obtain an evaluation result;

[0013] The judgment module, if the evaluation result is inconsistent, the vehicle-mounted device initiates a line data request instruction to the corresponding data management unit;

[0014] The distribution module responds to the route data request instruction, and the vehicle-mounted device receives the latest route data based on a preset vehicle-road collaborative distribution algorithm, and the latest route data is requested and converted by the data management unit from the central data management server.

[0015] The beneficial effects of the present invention are:

[0016] The present invention avoids repeated storage of line data of the entire network on each on-board device by centrally managing data and distributing it on demand, saving a large amount of manpower and material resources; based on the vehicle-road collaborative distribution algorithm, the on-board device can obtain the latest line data on demand, avoiding the storage of unnecessary data and improving the operating efficiency of the system.

[0017] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by implementing the embodiments of the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a flow chart of the method for transmitting urban area co-managed line data described in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of a transmission system for urban area co-managed line data described in an embodiment of the present application;

[0021] Figure 3This is a diagram of the data distribution software architecture described in the embodiments of the present application;

[0022] Figure 4 This is the flow chart of TR-APEDF algorithm.

[0023] Markings in the figure: 1. Receiving module; 2. Checking module; 21. First extraction unit; 22. First parsing unit; 23. First detection unit; 3. Judgment module; 31. First acquisition unit; 32. First processing unit; 321. First evaluation unit; 322. First broadcasting unit; 323. First judgment unit; 324. Second judgment unit; 33. Second processing unit; 4. Distribution module; 41. First receiving unit; 42. Second acquisition unit; 43. First conversion unit; 44. Third processing unit; 45. Third judgment unit; 46. Fourth judgment unit; 47. First transmission unit. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0026] Example 1

[0027] like Figure 1 As shown, this embodiment provides a method for transmitting urban co-managed line data, including step S100, step S200, step S300 and step S400.

[0028] Step S100, the vehicle-mounted device receives the latest operation plan information in real time;

[0029] Step S200: In response to the operation plan information, the vehicle-mounted device checks whether the currently stored route data is consistent with the operation plan information to obtain an evaluation result;

[0030] Step S300: If the evaluation result is inconsistent, the vehicle-mounted device initiates a line data request instruction to the corresponding data management unit;

[0031] Step S400: In response to the route data request instruction, the vehicle-mounted device receives the latest route data based on a preset vehicle-road cooperative distribution algorithm. The latest route data is requested and converted by the data management unit from the central data management server.

[0032] Specifically, first, each equipment manufacturer jointly determines a common line data basic information table according to the line design, which includes line length information, track section information, turnout information, signal machine information, balise information, station track information, etc. This solution sets up a central data management server in the line network center, and each line sets up a data management unit for each equipment vendor according to different equipment vendors. The central data management server manages the common line basic information data of the entire line network and distributes the data to each equipment vendor data unit in real time, and sends the corresponding data according to the request of the data management unit of each equipment vendor, and realizes the real-time version verification at the same time. The data management unit requests the basic data obtained from the central data management server in real time, and regularly makes version verification requests to generate line data dedicated to each equipment vendor, and sends it to the station equipment and the corresponding on-board equipment requesting the data in real time. The on-board equipment receives the operation plan information in real time, and requests the line data information of the corresponding line according to the operation plan. If the line path has not changed from the operation plan before, and the data of the line has not changed, there is no need to download the data again, otherwise the on-board equipment downloads the data again according to the plan. Before departure or during operation, the on-board equipment compares the data version with the data management unit in real time. If the on-board equipment has no data or the data version is inconsistent with the planned operation route, it requests in real time to send the planned operation route data from the data management unit.

[0033] It should be noted that step S200 includes step S210, step S220 and step S230.

[0034] Step S210: the vehicle-mounted device extracts the currently stored line data version information from the memory;

[0035] It is understood that the method of extracting version information involves reading a predefined version identifier from the memory of the vehicle-mounted device, which includes metadata such as the generation time of the data, the version number and the checksum. In this way, the vehicle-mounted device can quickly determine whether the route data it holds is the latest version.

[0036] Step S220, analyzing and processing the operation plan information to obtain the latest route data version;

[0037] It is understood that the parsing process involves format conversion and data extraction of the operation plan information to generate a version identifier that can be compared with the existing route data version. This step ensures that the on-board equipment always has the latest route information and adapts to the dynamically changing operation environment.

[0038] Step S230: Perform consistency check on the line data version information and the latest line data version to obtain an evaluation result.

[0039] It is understandable that consistency detection can quickly and accurately evaluate the current data status of the on-board equipment and determine whether the line data needs to be updated. This step effectively avoids unnecessary data transmission and saves bandwidth and computing resources.

[0040] It should be noted that step S300 includes step S310, step S320 and step S330.

[0041] Step S310: Obtain network status information, where the network information includes the current network environment and resource status;

[0042] Step S320: Perform self-discovery detection processing on the network status information based on a preset self-discovery detection mechanism to obtain a detection result;

[0043] It should be noted that step S320 includes step S321, step S322, step S323 and step S324.

[0044] Step S321, the vehicle-mounted device evaluates the network status information in real time to obtain a network evaluation result;

[0045] Step S322: Based on the network evaluation result, the vehicle-mounted device periodically broadcasts a self-discovery message to the entire area, where the self-discovery message includes the identification information of the vehicle-mounted device and the current network parameters;

[0046] Step S323: If the vehicle-mounted device receives a self-discovery message from other vehicle-mounted devices in the network, it determines whether the remote target matches the local configuration to obtain a configuration evaluation result;

[0047] Step S324: If the configuration evaluation result is a successful match, the vehicle-mounted device sends a self-discovery confirmation message to the remote vehicle-mounted device that initiated the self-discovery message, and monitors and maintains the confirmed network connection according to a preset validity time period to obtain a detection result.

[0048] Step S330: Dynamically monitor the network and status of the vehicle-mounted devices in the network based on the detection results.

[0049] It is understandable that the vehicle data distribution mechanism is managed by the central data management server, which manages the resource status, the expectation of resources and the network status. The present invention tailors and optimizes the detection mechanism of the real-time data publishing and subscription model to adapt to the situation where the network transmission bandwidth is limited in the vehicle-mounted equipment usage scenario. In order to meet the flexibility and real-time requirements of vehicle-mounted distributed application communications, a data-centric publishing and detection communication model is established. In view of the limited resources such as computing, storage and network transmission bandwidth in the vehicle environment, a self-discovery detection mechanism of the communication model is proposed. Figure 3 As shown in the figure, the service software is located between the distributed application software and the underlying network, including the interface layer, the core layer and the adaptation layer. The interface layer provides a standard transmission service interface for the distributed application software, and the core layer provides real-time, reliable and flexible publishing detection services. It completes the dynamic networking of the subject through the self-discovery mechanism and builds a publishing detection model. The detection process includes the following steps: First, the application software calls the initialization interface to complete the initialization of the data distribution service, and the participants begin to periodically broadcast the self-discovery message to the entire domain; secondly, after receiving the self-discovery message, the other successfully initialized vehicle communication controller software in the network parses and determines whether the remote target matches the local configuration. If the match is successful, it replies with a self-discovery confirmation message; thirdly, after receiving the self-discovery confirmation message, the application software parses and determines whether the remote target matches the local configuration. If the match is successful, the remote endpoint goes online and is added to the remote endpoint table; finally, after the receiver completes the self-discovery, it sends a valid message to each remote initiator that is online according to its validity period and monitors its status.

[0050] It should be noted that step S400 includes step S410, step S420, step S430, step S440, step S450, step S460 and step S470.

[0051] Step S410: The data management unit receives the line data request instruction and verifies the validity of the request to obtain a verification result;

[0052] It is understood that the verification result includes the identification information of the on-board device in the check request, the requested line data identification, and possible security authentication or permission requirements. The purpose of the verification is to ensure that the request is legitimate, the requested line data does exist and can be distributed to the requesting on-board device. This step improves the security and reliability of data transmission, avoids unauthorized access, and ensures that the data obtained by the on-board device is up-to-date and correct, thereby effectively supporting the real-time operation needs of the urban rail transit system.

[0053] Step S420: Based on the verification result, the data management unit verifies and obtains the latest line basic information data from the central data management server;

[0054] It is understandable that the verification includes confirming the version and integrity of the data and ensuring that the acquired data is consistent with the current operating plan and vehicle requirements.

[0055] Step S430: The data management unit converts the line basic information data to obtain dedicated line data.

[0056] It is understandable that the conversion process includes customizing the general line basic information according to the needs and configurations of each equipment manufacturer. This involves adjusting the data format, optimizing the data structure, or adding specific metadata to meet the operating requirements of the vehicle-mounted equipment. Through customized processing in this step, the data management unit can effectively generate dedicated line data suitable for each vehicle-mounted equipment, ensuring the real-time and applicability of the data.

[0057] Step S440: The vehicle-mounted device performs task initialization based on a preset vehicle-road cooperative algorithm, and obtains an initialization result by sorting tasks, initializing the system all the time, and creating a task queue;

[0058] Step S450: Based on the initialization result, if the vehicle-mounted device recognizes the data distribution request of the data management unit, the task with the earliest deadline is preferentially scheduled to be executed according to the time of the task to obtain the task execution result;

[0059] Step S460: If a sudden task occurs during the execution process, the task is executed by a preset special thread rule, and the execution period of other tasks is adjusted by a preset variable period task scheduling algorithm;

[0060] Step S470: Based on the task execution result, the vehicle-mounted device updates the task status by processing the deadline update, task cancellation and resumption, and receiving the latest route data.

[0061] It should be noted that the traditional EDF algorithm (Earliest Deadline First) is a real-time task scheduling algorithm, and its core idea is to schedule tasks according to the earliest deadline of the task. The advantage of this algorithm is that it can meet the deadline requirements of the task and has high real-time performance. However, the EDF algorithm also has some limitations and challenges. First, the EDF algorithm has high requirements on the deadline of the task. If the deadline of the task cannot be set accurately, it may cause system performance to degrade. Secondly, the EDF algorithm cannot handle the priority of the task and cannot guarantee the execution of low-priority tasks. In response to this situation, the present invention proposes a variable-cycle EDF algorithm TR-APEDF (Train-Road AlterablePeriod EDF) based on vehicle-road collaboration. The algorithm is improved on the basis of EDF. When a task is canceled, the execution time of the task is evenly cut to the cycle of other tasks, so that the task cycle of the new task set is reduced as a whole, and the processor utilization rate is increased.

[0062] Specifically, the variable-period EDF algorithm (APEDF) first sorts the tasks according to the deadline from small to large, and then prioritizes the tasks with the earliest deadline to ensure that the deadlines of the tasks are met. The implementation principle of this algorithm is: sort all real-time tasks according to the deadline from small to large, initialize the system clock; select the task with the earliest deadline for scheduling; if the task is not completed, move its deadline backward; when a task is canceled, the execution time of the task is evenly cut to the period of other tasks, so that the overall task period of the new task set becomes smaller. When a task is resumed, the execution time of the task is averagely increased to the period of other tasks to restore it to its original state. For example, suppose there is a task set of n periodic tasks τ1, τ2, τ3,…, τ n , whose execution time is t1, t2, t3, …, t n , the task cycle is T1, T2, T3, …, T n , after a period of time, task τ1 is cancelled, and the task set becomes τ2, τ3, …, τ n , the processor utilization is After the cancellation of task τ1, the APEDF algorithm cuts the execution time of the task to the cycle of other tasks on average. The cycle of the APEDF task set becomes Therefore, the processor utilization After that, the basic principle of EDF algorithm is still followed. Obviously, the processor utilization U obtained by conventional calculation is edf Less than the processor utilization U obtained by the APEDF algorithm apedf Therefore, the APEDF algorithm makes effective use of idle time. The APEDF algorithm improves processor utilization and improves task execution efficiency.

[0063] Furthermore, TR-APEDF (Train Road-APEDF) algorithm refers to the APEDF data distribution algorithm suitable for vehicle-road environment. By analyzing the vehicle-road cooperative data transmission mechanism and APEDF algorithm, APEDF is reasonably applied to the data distribution task of the vehicle-road cooperative system. Specifically, in this paper of the APEDF algorithm, the vehicle-road cooperative data distribution task set is designed according to the characteristics of vehicle-road cooperative data and the parameter characteristics of the EDF algorithm, as shown in Table 1 below.

[0064] Table 1. Vehicle-road cooperative data distribution task set

[0065]

[0066]

[0067] As shown in Table 1, each task represents the periodic distribution of electronic map data from the trackside equipment to the on-board equipment. Task 0 is the task of distributing emergency data. The periods assigned to tasks 1 to n with strong real-time performance are relatively small. T1, T2, …, Tn refer to the worst execution time, and T takes the maximum value of the experiment.

[0068] Specifically, the algorithm flow Figure 4 As shown. The TR-APEDF algorithm is mainly composed of three processes: the main process executes the EDF algorithm, first initializes the task queue, then updates the task queue according to the deadline of the inserted task and the deadline of the secondary task, and executes them in sequence; one of the threads Thread_A starts a listener to listen to the sudden task, and whenever the sudden task Task0 arrives, it is executed immediately, and the execution time is determined by the event duration; another Thread_B starts a listener to listen to the disappearance and recovery of the task, and uses the APEDF variable-period EDF algorithm to execute.

[0069] The algorithm implementation needs to first construct a data distribution task class and create an object of this class for each task to store the relevant information of this class. The class is shown in Table 2.

[0070] Table 2 Task Classes

[0071]

[0072] The algorithm is implemented in a timer-driven way. Whenever a periodic task comes, a judgment must be made to determine the deadline of the new task and the deadline of the sub-task, update the task queue, and execute the data transmission task according to the queue. The algorithm is verified under Linux. After canceling Task1, the processor utilization rate increases by about 10%, which improves the processing efficiency of data distribution.

[0073] Example 2

[0074] like Figure 2 As shown, the present application provides a system for transmitting data on a city-wide co-managed line, including:

[0075] Receiving module 1, the vehicle-mounted equipment receives the latest operation plan information in real time;

[0076] Checking module 2, in response to the operation plan information, the onboard device checks whether the currently stored route data is consistent with the operation plan information to obtain an evaluation result;

[0077] Judgment module 3, if the evaluation result is inconsistent, the vehicle-mounted device initiates a line data request instruction to the corresponding data management unit;

[0078] The distribution module 4 responds to the route data request instruction, and the vehicle-mounted equipment receives the latest route data based on the preset vehicle-road cooperative distribution algorithm. The latest route data is requested and converted by the data management unit from the central data management server.

[0079] In a specific embodiment of the present invention, the inspection module 2 includes:

[0080] The first extraction unit 21, the vehicle-mounted device extracts the currently stored route data version information from the memory;

[0081] A first parsing unit 22 performs parsing processing according to the operation plan information to obtain the latest route data version;

[0082] The first detection unit 23 performs consistency detection on the line data version information and the latest line data version to obtain an evaluation result.

[0083] In a specific implementation of the present invention, the judgment module 3 includes:

[0084] A first acquisition unit 31 is used to acquire network status information, where the network information includes the current network environment and resource status;

[0085] A first processing unit 32 performs self-discovery detection processing on the network status information based on a preset self-discovery detection mechanism to obtain a detection result;

[0086] The second processing unit 33 performs dynamic network and status monitoring on the vehicle-mounted devices in the network based on the detection result.

[0087] In a specific embodiment of the present invention, the first processing unit 32 includes:

[0088] The first evaluation unit 321, the vehicle-mounted device evaluates the network status information in real time to obtain a network evaluation result;

[0089] The first broadcast unit 322, based on the network evaluation result, the vehicle-mounted device periodically broadcasts a self-discovery message to the entire area, the self-discovery message including the identification information of the vehicle-mounted device and the current network parameters;

[0090] The first judgment unit 323, if the vehicle-mounted device receives a self-discovery message from other vehicle-mounted devices in the network, judges whether the remote target matches the local configuration to obtain a configuration evaluation result;

[0091] The second judgment unit 324, if the configuration evaluation result is a successful match, the vehicle-mounted device sends a self-discovery confirmation message to the remote vehicle-mounted device that initiated the self-discovery message, and monitors and maintains the confirmed network connection according to a preset validity time period to obtain a detection result.

[0092] In a specific embodiment of the present invention, the distribution module 4 includes:

[0093] The first receiving unit 41, the data management unit receives the line data request instruction, and verifies the validity of the request to obtain a verification result;

[0094] The second acquisition unit 42, based on the verification result, the data management unit verifies and obtains the latest line basic information data from the central data management server;

[0095] The first conversion unit 43, the data management unit converts the line basic information data to obtain dedicated line data.

[0096] The third processing unit 44, the vehicle-mounted device performs task initialization based on the preset vehicle-road cooperative algorithm, obtains the initialization result by sorting the tasks, initializing the system all the time and creating a task queue;

[0097] The third judgment unit 45, based on the initialization result, if the vehicle-mounted device recognizes the data distribution request of the data management unit, the task with the earliest deadline is preferentially scheduled to be executed according to the time of the task to obtain the task execution result;

[0098] The fourth judgment unit 46, if a sudden task occurs during the execution process, executes the task through a preset special thread rule, and adjusts the execution period of other tasks using a preset variable period task scheduling algorithm;

[0099] The first transmission unit 47 updates the task status based on the task execution result, processes the deadline update, task cancellation and resumption, and receives the latest route data.

[0100] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for transmitting data on a city-wide co-managed line, characterized in that: include: The on-board equipment receives the latest operation plan information in real time; In response to the operation plan information, the onboard device checks whether the currently stored route data is consistent with the operation plan information to obtain an evaluation result; If the evaluation result is inconsistent, the vehicle-mounted device initiates a line data request instruction to the corresponding data management unit; In response to the route data request instruction, the vehicle-mounted device receives the latest route data based on a preset vehicle-road cooperative distribution algorithm, and the latest route data is requested and converted by the data management unit from the central data management server.

2. The method for transmitting data of a city-wide shared management line according to claim 1, characterized in that: The vehicle-mounted device checks whether the currently stored route data is consistent with the operation plan information to obtain an evaluation result, including: The on-board device extracts the currently stored line data version information from the memory; Analyze and process the operation plan information to obtain the latest route data version; The line data version information is checked for consistency with the latest line data version to obtain an evaluation result.

3. The method for transmitting data of a city-wide shared management line according to claim 1, characterized in that: The vehicle-mounted device initiates a line data request instruction to the corresponding data management unit, and before requesting new line data, further includes: Obtaining network status information, wherein the network information includes the current network environment and resource status; Based on a preset self-discovery detection mechanism, the network status information is subjected to self-discovery detection processing to obtain a detection result; Dynamic network and status monitoring is performed on the vehicle-mounted devices in the network based on the detection results.

4. The method for transmitting data of a city-wide shared management line according to claim 3, characterized in that: The network status information is subjected to self-discovery detection processing based on a preset self-discovery detection mechanism to obtain a detection result, including: The vehicle-mounted device evaluates the network status information in real time to obtain a network evaluation result; Based on the network evaluation result, the vehicle-mounted device periodically broadcasts a self-discovery message to the entire area, wherein the self-discovery message includes identification information of the vehicle-mounted device and current network parameters; If the vehicle-mounted device receives the self-discovery message from other vehicle-mounted devices in the network, it determines whether the remote target matches the local configuration to obtain a configuration evaluation result; If the configuration evaluation result is a successful match, the vehicle-mounted device sends a self-discovery confirmation message to the remote vehicle-mounted device that initiated the self-discovery message, and monitors and maintains the confirmed network connection according to a preset validity time period to obtain a detection result.

5. The method for transmitting data of a city-wide shared management line according to claim 1, characterized in that: In response to the route data request instruction, the vehicle-mounted device receives and obtains the latest route data based on a preset vehicle-road cooperative distribution algorithm, including: The on-board equipment performs task initialization based on the preset vehicle-road cooperative algorithm, and obtains the initialization result by sorting tasks, initializing the system all the time, and creating a task queue; Based on the initialization result, if the vehicle-mounted device recognizes the data distribution request of the data management unit, the task with the earliest deadline is preferentially scheduled to be executed according to the time of the task to obtain the task execution result; If a sudden task occurs during the execution process, the task is executed through the preset special thread rules, and the execution cycle of other tasks is adjusted using the preset variable period task scheduling algorithm; Based on the task execution result, the vehicle-mounted device updates the task status, processes the deadline update, task cancellation and resumption, and receives the latest route data.

6. A system for transmitting data on a city-wide co-managed line, characterized in that: include: Receiving module: the vehicle-mounted equipment receives the latest operation plan information in real time; A checking module, in response to the operation plan information, the onboard device checks whether the currently stored route data is consistent with the operation plan information to obtain an evaluation result; The judgment module, if the evaluation result is inconsistent, the vehicle-mounted device initiates a line data request instruction to the corresponding data management unit; The distribution module responds to the route data request instruction, and the vehicle-mounted device receives the latest route data based on a preset vehicle-road collaborative distribution algorithm, and the latest route data is requested and converted by the data management unit from the central data management server.

7. The transmission system of the city-wide shared line data according to claim 6, characterized in that: The inspection module comprises: A first extraction unit, the vehicle-mounted device extracts the currently stored line data version information from the memory; A first parsing unit, performing parsing processing according to the operation plan information to obtain the latest route data version; The first detection unit performs consistency detection on the line data version information and the latest line data version to obtain an evaluation result.

8. The transmission system of urban area condominium line data according to claim 6, characterized in that: The judging module comprises: A first acquisition unit, used to acquire network status information, wherein the network information includes the current network environment and resource status; A first processing unit, performing self-discovery detection processing on the network status information based on a preset self-discovery detection mechanism to obtain a detection result; The second processing unit performs dynamic network and status monitoring on the vehicle-mounted device in the network based on the detection result.

9. The transmission system of urban area condominium line data according to claim 8, characterized in that: The first processing unit comprises: A first evaluation unit, the vehicle-mounted device evaluates the network status information in real time to obtain a network evaluation result; A first broadcast unit, based on the network evaluation result, the vehicle-mounted device periodically broadcasts a self-discovery message to the entire area, wherein the self-discovery message includes identification information of the vehicle-mounted device and current network parameters; A first judgment unit, if the vehicle-mounted device receives the self-discovery message from other vehicle-mounted devices in the network, judges whether the remote target matches the local configuration to obtain a configuration evaluation result; The second judgment unit, if the configuration evaluation result is a successful match, the vehicle-mounted device sends a self-discovery confirmation message to the remote vehicle-mounted device that initiated the self-discovery message, and monitors and maintains the confirmed network connection according to a preset validity time period to obtain a detection result.

10. The transmission system of urban area condominium line data according to claim 6, characterized in that: The distribution module includes: The third processing unit, the vehicle-mounted equipment performs task initialization based on the preset vehicle-road cooperative algorithm, obtains the initialization result by sorting the tasks, initializing the system all the time and creating a task queue; A third judgment unit, based on the initialization result, if the vehicle-mounted device recognizes the data distribution request of the data management unit, preferentially schedules the task with the earliest deadline to execute according to the time of the task to obtain the task execution result; The fourth judgment unit, if a sudden task occurs during the execution process, executes the task through a preset special thread rule, and uses a preset variable period task scheduling algorithm to adjust the execution period of other tasks; The first transmission unit, based on the task execution result, the vehicle-mounted device updates the task status, processes the deadline update, task cancellation and recovery, and receives the latest route data.

Images