CN114162190A - Multithreading LKJ vehicle-mounted data wireless reloading data file transmission technical method - Google Patents
Multithreading LKJ vehicle-mounted data wireless reloading data file transmission technical method Download PDFInfo
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Abstract
The invention discloses a multithreading LKJ vehicle-mounted data wireless reloading data file transmission technical method. The method comprises the following steps: establishing authorized secure wireless communication connection with the train; the LKJ vehicle-mounted data wireless reloading ground system external network communication server divides the data file into sub-file blocks according to vehicle-mounted data files required by different LKJ trains, and calculates hash values of the sub-file blocks; generating a corresponding thread according to the LKJ vehicle-mounted data file and a corresponding LKJ train to be reloaded, and executing vehicle-ground transmission of the LKJ reloaded data file in parallel; the client initiates a registration request to the ground and establishes authorized safe wireless communication connection; the LKJ vehicle-mounted safety communication plug-in unit transparently forwards through the vehicle-mounted TSC, receives an LKJ wireless reloading data file transmitted on the ground and stores the LKJ wireless reloading data file in a cache region; and after the LKJ wireless reloading data file unit receives the data, packaging the data according to the rules of the file list and the transmission unit list. The LKJ vehicle-mounted data wireless reloading system can realize multi-thread parallel transmission when facing a multi-train reloading scene, and improve the transmission efficiency of LKJ vehicle-mounted data files and the utilization rate of an external network communication server CPU.
Description
Technical Field
The invention relates to the technical field of railway science, in particular to a multithreading LKJ vehicle-mounted data wireless reloading data file transmission technical method.
Background
The train operation monitoring device LKJ is train control vehicle-mounted equipment with the longest operation time and the widest operation range in China, and 2 thousand locomotives and 1 thousand multi-train motor train units are equipped on the whole road at present. In recent years, due to factors such as railway transportation basic equipment, facility technical data change, driving organization change, line construction and operation diagram adjustment, LKJ vehicle-mounted data are frequently changed, at present, an LKJ vehicle-mounted data reloading mode is mainly manual reloading, reloading personnel are required to carry out reloading operation in a timing, fixed-point and cable connection mode, the mode is time-consuming, labor-consuming and low in efficiency, and potential safety hazards such as mistaken reloading, missed reloading and early reloading exist, so that driving safety is affected.
In order to solve the problem, an LKJ vehicle-mounted data wireless reloading technology is developed, an LKJ vehicle-mounted data file and reloading related service data are transmitted from the ground to the vehicle in a wireless transmission mode, and a public mobile communication network 4G/5G is adopted as a vehicle-ground communication carrier. However, when multiple trains of vehicles simultaneously request to establish a connection to the extraterrestrial network communication server to transmit the LKJ vehicle-mounted data file, the LKJ vehicle-mounted data file is transmitted in series due to the currently adopted message queue manner, and the data file is frequently read from the intranet database server, so that the transmission channel is crowded, and the efficiency is low.
Disclosure of Invention
In view of the problems and difficulties faced when multiple trains of vehicles are reloaded simultaneously in the actual reloading scene, the invention provides a novel LKJ vehicle-mounted data wireless reloading data file multithreading transmission technology which is used for improving the reloading efficiency of multiple trains of vehicles simultaneously and ensuring the safety and the integrity of data.
In a first aspect, the invention provides a multithreading LKJ vehicle-mounted data wireless reloading data file transmission technical method, which is applied to a server side and comprises the following steps:
s1, establishing authorized safe wireless communication connection between a train and a ground;
s2, the LKJ vehicle-mounted data wireless reloading ground system external network communication server divides the data file into sub-file blocks according to vehicle-mounted data files required by different LKJ trains, and calculates hash values of the sub-file blocks;
and S3, generating a corresponding thread according to the LKJ vehicle-mounted data file and a corresponding LKJ train to be reloaded, and executing vehicle-ground transmission of the LKJ reloaded data file in parallel.
Further, the step S2 specifically includes:
s21, reading an LKJ vehicle-mounted data file by an LKJ vehicle-mounted data wireless reloading ground system external network communication server according to the reloading plan;
s22, the external network communication server divides the LKJ vehicle-mounted data file into sub-file blocks according to a certain rule, and simultaneously establishes a file block list related to the sub-file blocks, wherein the content comprises a sequence number, a sub-file number, an initial position and a hash value;
s23, generating corresponding threads according to the sub-file blocks of the LKJ vehicle-mounted data file, and transmitting the sub-file blocks in parallel;
and S24, the external network communication server divides the sub-file blocks according to the size of the transmission unit and writes the sub-file blocks into a sending queue.
In order to improve the reading efficiency of the LKJ vehicle-mounted data file, further, the step S21 is processed in two cases, specifically including:
s211, if the ground system outer network communication server reads the LKJ vehicle-mounted data file for the first time, performing data interaction with the inner network communication server through the railway safety transmission platform, reading the LKJ vehicle-mounted data file from the inner network communication server to the database server, and storing the LKJ vehicle-mounted data file in a cache region after the outer network communication server receives the LKJ vehicle-mounted data file for subsequent reading;
s212, if the needed LKJ vehicle-mounted data file exists in the ground system external network communication server cache region, only reading from the server memory is needed, and re-reading from the internal network server is not needed.
Further, the step S24 specifically includes:
s241, the external network communication server divides the sub-file blocks according to the size of the transmission unit;
s242, calculating hash values of all transmission units, and generating a transmission unit list, wherein the contents comprise a serial number, a transmission unit number, a file block to which the transmission unit number belongs, an initial position and the hash values;
and S243, writing in the sending queue in sequence and carrying out serial transmission.
Facing to the scene of changing the equipment of multiple trains simultaneously, further, step S3 specifically includes:
s31, according to the reloading plan, the ground system external network communication server generates a new thread to process vehicle-ground transmission of the LKJ vehicle-mounted data file;
and S32, executing the step S2.
In a second aspect, a multithreading LKJ vehicle-mounted data wireless reloading data file transmission technical method is provided, and is applied to a client, and includes:
s1, a vehicle initiates a registration request to the ground and establishes authorized safe wireless communication connection;
s2, transparently forwarding the LKJ vehicle-mounted safety communication plug-in through the vehicle-mounted TSC, receiving an LKJ wireless reloading data file transmitted on the ground, and storing the LKJ wireless reloading data file in a cache region;
and S3, after the LKJ wireless reloading data file unit receives the data, packaging the data according to the rules of the file list and the transmission unit list.
Further, the step S2 specifically includes:
s21, the LKJ vehicle-mounted safety communication plug-in receives a file block list and a transmission unit list transmitted by the ground external network communication server and stores the file block list and the transmission unit list into a cache region;
s22, dividing the storage address range of the file block in sequence according to the data initial position information of the file block list;
s23, the LKJ vehicle-mounted safety communication plug-in receives an LKJ wireless reloading data file transmission unit from the ground, calculates hash values of the LKJ wireless reloading data file transmission unit, verifies data correctness and integrity, and feeds back transmission completion information;
and S24, storing the data transmission unit according to the file block sequence number and the initial position information according to the transmission unit list.
Further, the step S3 specifically includes:
s31, after the LKJ wireless reloading data file unit receives the data file, packing the data file once according to the transmission unit list to generate a corresponding file block, and checking a hash value of the file block;
and S32, performing secondary packaging according to the file block list, combining the file blocks to generate an LKJ wireless reloading data file, calculating a hash value of the LKJ wireless reloading data file, checking the correctness and the integrity of the data file, and feeding back packaging completion information.
The invention has the beneficial effects that: the invention aims at a scene that multiple trains in an LKJ vehicle-mounted data wireless reloading system request reloading, and mutually independent threads are constructed according to different trains to carry out vehicle-ground transmission of LKJ vehicle-mounted data files, so that the transmission efficiency of the LKJ vehicle-mounted data files and the utilization rate of a ground system extranet communication server CPU are effectively improved, and the data transmission has the characteristics of strong real-time performance, easiness in use, high efficiency and the like; by caching the data file into the memory of the extranet communication server, the steps of repeatedly taking the same data are reduced, and the communication pressure of the railway safety transmission platform, the intranet communication server and the database server is relieved; by generating the data block list and the transmission unit list, the efficiency of subpackaging and packaging at the server side and the user side is improved, a foundation is laid for improving the efficiency of breakpoint continuous transmission of data, and the data transmission method has better expansibility. The invention provides a whole set of high-performance transmission solution for a multithreading LKJ vehicle-mounted data wireless reloading data file transmission technical method oriented to a multi-train reloading scene.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a flowchart of a server-side method according to an embodiment of the present invention.
Fig. 2 is a flowchart of a server-side data file multithreading method according to an embodiment of the present invention.
Fig. 3 is a flowchart of a server-side data file access method according to an embodiment of the present invention.
Fig. 4 is a flowchart of processing of a server-side transmission unit according to an embodiment of the present invention.
Fig. 5 is a data processing flowchart in a scenario where a server side requests a multi-train reloading according to an embodiment of the present invention.
Fig. 6 is a flowchart of a client method according to an embodiment of the present invention.
Fig. 7 is a flowchart of a client data file receiving process according to an embodiment of the present invention.
FIG. 8 is a flowchart of a client data file package according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The embodiment of the invention provides a multithreading LKJ vehicle-mounted data wireless reloading data file transmission technical method which is applied to a server side and is shown in figure 1, and the method comprises the following steps:
s1: establishing authorized secure wireless communication connection with the train;
s2, the LKJ vehicle-mounted data wireless reloading ground system external network communication server divides the data file into sub-file blocks according to vehicle-mounted data files required by different LKJ trains, and calculates hash values of the sub-file blocks;
referring to fig. 2, a specific process of processing an LKJ vehicle-mounted data file at a server side in the embodiment of the present invention includes the following steps:
s21, reading an LKJ vehicle-mounted data file by an LKJ vehicle-mounted data wireless reloading ground system external network communication server according to the reloading plan;
referring to fig. 3, a specific determination process of the method for accessing a server-side data file according to the embodiment of the present invention is as follows:
s211, if the ground system outer network communication server reads the LKJ vehicle-mounted data file for the first time, performing data interaction with the inner network communication server through the railway safety transmission platform, reading the LKJ vehicle-mounted data file from the inner network communication server to the database server, and storing the LKJ vehicle-mounted data file in a cache region after the outer network communication server receives the LKJ vehicle-mounted data file for subsequent reading;
s212, if the needed LKJ vehicle-mounted data file exists in the ground system external network communication server cache region, only reading from the server memory is needed, and re-reading from the internal network server is not needed.
Specifically, an outer network communication server of the LKJ vehicle-mounted data wireless reloading ground system is responsible for communicating with an LKJ vehicle-mounted safety communication plug-in unit externally, and carries out data interaction with an inner network communication server internally through a railway safety transmission platform. When an external network communication server needs to read an LKJ vehicle-mounted data file, judging whether the LKJ vehicle-mounted data file exists in a memory of the external network communication server or not, if so, reading the LKJ vehicle-mounted data file from the memory of the external network communication server, and automatically deleting the cached data file after a certain time so as to release the memory space and relieve the pressure of the memory; and if the LKJ data file does not exist, reading the required LKJ vehicle-mounted data file from the intranet database server through the intranet communication server, and finally transmitting the LKJ vehicle-mounted data file to the extranet communication server for caching for subsequent use.
S22, the external network communication server divides the LKJ vehicle-mounted data file into sub-file blocks according to a certain rule, and simultaneously establishes a file block list related to the sub-file blocks, wherein the content comprises a sequence number, a sub-file number, an initial position and a hash value;
s23, generating corresponding threads according to the sub-file blocks of the LKJ vehicle-mounted data file, and transmitting the sub-file blocks in parallel;
and S24, the external network communication server divides the sub-file blocks according to the size of the transmission unit and writes the sub-file blocks into a sending queue.
Specifically, according to a reloading plan, an LKJ vehicle-mounted data wireless reloading ground system outer network communication server reads an LKJ vehicle-mounted data file, the LKJ vehicle-mounted data file is processed in two steps, firstly, the LKJ vehicle-mounted data file is divided into sub-file blocks according to a certain rule, a file block list related to the sub-file blocks is established, the content comprises a sequence number, a sub-file number, an initial position and a hash value, corresponding threads are generated according to the sub-file blocks of the LKJ vehicle-mounted data file, and the sub-file blocks are transmitted in a multithreading and parallel mode; and then the extranet communication server divides the sub-file blocks according to the size of the transmission unit, writes the sub-file blocks into a sending queue, and transmits the sub-file blocks in series by the transmission unit. After the transmission unit in a certain sub-file block finishes transmission, the external network communication server CPU is in an idle state at the moment, and the steps of receiving and verifying data and the like by the LKJ vehicle-mounted safety communication plug-in are waited, so that the transmission unit in the sub-file block of another thread performs transmission operation. The operation can transfer the CPU to the maximum extent, and the CPU utilization rate and the data transmission efficiency are improved.
Referring to fig. 4, a specific process of processing a transmission unit at a server according to an embodiment of the present invention includes the following steps:
s241, the external network communication server divides the sub-file blocks according to the size of the transmission unit;
s242, calculating hash values of all transmission units, and generating a transmission unit list, wherein the contents comprise a serial number, a transmission unit number, a file block to which the transmission unit number belongs, an initial position and the hash values;
and S243, writing in the sending queue in sequence and carrying out serial transmission.
Specifically, the extranet communication server divides the transmission units of the sub-file blocks according to a certain rule, arranges the transmission units in sequence, calculates the hash value of each transmission unit, generates a transmission unit list, and writes the contents including the sequence number, the transmission unit number, the file block to which the transmission unit belongs, the initial position and the hash value into a transmission queue in sequence to transmit data in series. The generated transmission list can enable the data arrangement structure to be more reasonable and has better expansibility.
And S3, generating a corresponding thread according to the LKJ vehicle-mounted data file and a corresponding LKJ train to be reloaded, and executing vehicle-ground transmission of the LKJ reloaded data file in parallel.
Referring to fig. 5, a specific process of data processing performed by a server in a scenario of requesting reloading of multiple trains according to an embodiment of the present invention includes the following steps:
s31, according to the reloading plan, the ground system external network communication server generates a new thread to process vehicle-ground transmission of the LKJ vehicle-mounted data file;
and S32, executing the step S2.
Specifically, after a plurality of trains simultaneously request for reloading to the ground and safe communication connection is established between the trains and the ground, corresponding threads are generated according to different trains, data processing of the threads is independent, and data are transmitted in parallel. The specific processing flow of the data refers to step S2 and the subsequent steps thereof.
The embodiment of the invention provides a multithreading LKJ vehicle-mounted data wireless reloading data file transmission technical method which is applied to a client side and is shown in figure 6, and the method comprises the following steps:
s1, a vehicle initiates a registration request to the ground and establishes authorized safe wireless communication connection;
s2, transparently forwarding the LKJ vehicle-mounted safety communication plug-in through the vehicle-mounted TSC, receiving an LKJ wireless reloading data file transmitted on the ground, and storing the LKJ wireless reloading data file in a cache region;
referring to fig. 7, a specific process of receiving and processing a client data file according to an embodiment of the present invention includes the following steps:
s21, the LKJ vehicle-mounted safety communication plug-in receives a file block list and a transmission unit list transmitted by the ground external network communication server and stores the file block list and the transmission unit list into a cache region;
s22, dividing the storage address range of the file block in sequence according to the data initial position information of the file block list;
s23, the LKJ vehicle-mounted safety communication plug-in receives an LKJ wireless reloading data file transmission unit from the ground, calculates hash values of the LKJ wireless reloading data file transmission unit, verifies data correctness and integrity, and feeds back transmission completion information;
and S24, storing the data transmission unit according to the file block sequence number and the initial position information according to the transmission unit list.
Specifically, the LKJ vehicle-mounted safety communication plug-in receives a file block list and a transmission unit list transmitted by the ground external network communication server, and divides a stored address range according to information in the file block list so as to store data of each transmission unit. The LKJ vehicle-mounted safety communication plug-in receives an LKJ wireless reloading data file transmission unit from the ground, calculates a hash value, verifies the correctness and the integrity of data, feeds back transmission completion information to the ground, deletes the transmission unit if the transmission fails, interacts with the ground and requests to retransmit the unit. And after the transmission is successful, the vehicle-mounted safety communication plug-in stores the data transmission unit according to the transmission unit list, the file block sequence number and the initial position information for subsequent packaging.
And S3, after the LKJ wireless reloading data file unit receives the data, packaging the data according to the rules of the file list and the transmission unit list.
Referring to fig. 8, a specific process of the client data file package provided by the embodiment of the present invention includes the following steps:
s31, after the LKJ wireless reloading data file unit receives the data file, packing the data file once according to the transmission unit list to generate a corresponding file block, and checking a hash value of the file block;
and S32, performing secondary packaging according to the file block list, combining the file blocks to generate an LKJ wireless reloading data file, calculating a hash value of the LKJ wireless reloading data file, checking the correctness and the integrity of the data file, and feeding back packaging completion information.
Specifically, after receiving an LKJ vehicle-mounted data file transmission unit from the ground, an LKJ vehicle-mounted safety communication plug-in unit packages twice according to information of file blocks and data files, wherein the first package is carried out according to a transmission unit list, the file blocks are generated after the first package is finished, and the correctness and the integrity of data are verified by calculating hash values of the file blocks; and the second packaging is carried out according to the file block list, an LKJ data file is generated after the second packaging is finished, and the correctness and the integrity of the data are verified by calculating the hash value of the LKJ data file. And after the completion, feeding back the composition completion information to the ground to form data file transmission closed-loop management.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A multithreading LKJ vehicle-mounted data wireless reloading data file transmission technical method is applied to a server side and is characterized by comprising the following steps:
s1, establishing authorized safe wireless communication connection between a train and a ground;
s2, the LKJ vehicle-mounted data wireless reloading ground system external network communication server divides the data file into sub-file blocks according to vehicle-mounted data files required by different LKJ trains, and calculates hash values of the sub-file blocks;
and S3, generating a corresponding thread according to the LKJ vehicle-mounted data file and a corresponding LKJ train to be reloaded, and executing vehicle-ground transmission of the LKJ reloaded data file in parallel.
2. The technical method for transmitting the LKJ vehicle-mounted data wireless reloading data file in multiple threads as claimed in claim 1, wherein the step S2 comprises the following sub-steps:
s21, reading an LKJ vehicle-mounted data file by an LKJ vehicle-mounted data wireless reloading ground system external network communication server according to the reloading plan;
s22, the external network communication server divides the LKJ vehicle-mounted data file into sub-file blocks according to a certain rule, and simultaneously establishes a file block list related to the sub-file blocks, wherein the content comprises a sequence number, a sub-file number, an initial position and a hash value;
s23, generating corresponding threads according to the sub-file blocks of the LKJ vehicle-mounted data file, and transmitting the sub-file blocks in parallel;
and S24, the external network communication server divides the sub-file blocks according to the size of the transmission unit and writes the sub-file blocks into a sending queue.
3. The technical method for transmitting the LKJ vehicle-mounted data wireless reloading data file in multiple threads as claimed in claim 2, wherein the step S21 comprises the following sub-steps:
s211, if the ground system outer network communication server reads the LKJ vehicle-mounted data file for the first time, performing data interaction with the inner network communication server through the railway safety transmission platform, reading the LKJ vehicle-mounted data file from the inner network communication server to the database server, and storing the LKJ vehicle-mounted data file in a cache region after the outer network communication server receives the LKJ vehicle-mounted data file for subsequent reading;
s212, if the needed LKJ vehicle-mounted data file exists in the ground system external network communication server cache region, only reading from the server memory is needed, and re-reading from the internal network server is not needed.
4. The technical method for transmitting the LKJ vehicle-mounted data wireless reloading data file in multiple threads as claimed in claim 2, wherein the step S24 comprises the following sub-steps:
s241, the external network communication server divides the sub-file blocks according to the size of the transmission unit;
s242, calculating hash values of all transmission units, and generating a transmission unit list, wherein the contents comprise a serial number, a transmission unit number, a file block to which the transmission unit number belongs, an initial position and the hash values;
and S243, writing in the sending queue in sequence and carrying out serial transmission.
5. The technical method for transmitting the LKJ vehicle-mounted data wireless reloading data file in multiple threads as claimed in claim 1, wherein the step S3 comprises the following sub-steps:
s31, according to the reloading plan, the ground system external network communication server generates a new thread to process vehicle-ground transmission of the LKJ vehicle-mounted data file;
and S32, executing the step S2.
6. A multithreading LKJ vehicle-mounted data wireless reloading data file transmission technical method is applied to a client side and is characterized by comprising the following steps:
s1, a vehicle initiates a registration request to the ground and establishes authorized safe wireless communication connection;
s2, transparently forwarding the LKJ vehicle-mounted safety communication plug-in through the vehicle-mounted TSC, receiving an LKJ wireless reloading data file transmitted on the ground, and storing the LKJ wireless reloading data file in a cache region;
and S3, after the LKJ wireless reloading data file unit receives the data, packaging the data according to the rules of the file list and the transmission unit list.
7. The technical method for transmitting the LKJ vehicle-mounted data wireless reloading data file in multiple threads as claimed in claim 6, wherein the step S2 comprises the following sub-steps:
s21, the LKJ vehicle-mounted safety communication plug-in receives a file block list and a transmission unit list transmitted by the ground external network communication server and stores the file block list and the transmission unit list into a cache region;
s22, dividing the storage address range of the file block in sequence according to the data initial position information of the file block list;
s23, the LKJ vehicle-mounted safety communication plug-in receives an LKJ wireless reloading data file transmission unit from the ground, calculates hash values of the LKJ wireless reloading data file transmission unit, verifies data correctness and integrity, and feeds back transmission completion information;
and S24, storing the data transmission unit according to the file block sequence number and the initial position information according to the transmission unit list.
8. The technical method for transmitting the LKJ vehicle-mounted data wireless reloading data file in multiple threads as claimed in claim 6, wherein the step S3 comprises the following sub-steps:
s31, after the LKJ wireless reloading data file unit receives the data file, packing the data file once according to the transmission unit list to generate a corresponding file block, and checking a hash value of the file block;
and S32, performing secondary packaging according to the file block list, combining the file blocks to generate an LKJ wireless reloading data file, calculating a hash value of the LKJ wireless reloading data file, checking the correctness and the integrity of the data file, and feeding back packaging completion information.
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| CN115140126A (en) * | 2022-04-27 | 2022-10-04 | 西南交通大学 | Digital wireless communication method for general-speed railway train operation control |
| CN117632312A (en) * | 2024-01-25 | 2024-03-01 | 深圳市永联科技股份有限公司 | Data interaction method and related device |
| CN117632312B (en) * | 2024-01-25 | 2024-05-14 | 深圳市永联科技股份有限公司 | Data interaction method and related device |
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