CN113507700A - Rail transit vehicle-ground communication link switching test method and system - Google Patents
Rail transit vehicle-ground communication link switching test method and system Download PDFInfo
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- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/42—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for mass transport vehicles, e.g. buses, trains or aircraft
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
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Abstract
The invention discloses a rail transit vehicle-ground communication link switching test method, which comprises the following steps: step 1, arranging a vehicle-mounted simulation unit and a ground simulation unit in opposite directions at two sides in a test darkroom, wherein the vehicle-mounted simulation unit comprises a vehicle-mounted communication module, and the ground simulation unit comprises a plurality of base station communication modules arranged at intervals; step 2, debugging the base station communication module of the ground simulation unit, wherein the communicable range of the adjacent base station communication module has an overlapping area; step 3, controlling the vehicle-mounted simulation unit to rotate in a range of 180 degrees horizontally towards the direction surface of the ground simulation unit, simultaneously carrying out wireless communication between the vehicle-mounted communication module and the ground simulation unit, and switching the working state of each base station communication module in the ground simulation unit according to a set link switching method; and 4, processing and analyzing the communication data of the vehicle-mounted communication module and the communication data of the base station communication module. The invention can conveniently carry out dynamic switching test of vehicle-ground communication, and has low cost and high simulation degree.
Description
Technical Field
The invention relates to the field of rail transit vehicle-ground communication, in particular to a rail transit vehicle-ground communication link switching test method and a rail transit vehicle-ground communication link switching test system.
Background
With the continuous increase of high-speed communication service demand in the process of controlling high-reliability data service transmission by a high-speed train and passengers taking a bus, how to provide high-speed and high-reliability communication service under the high-movement environment of a high-speed railway has a very important significance. In order to realize high-speed transmission of train-ground data, the existing train-mounted communication terminal and the trackside base station generally adopt directional narrow-wave communication equipment, which has a long communication distance and a narrow communication angle range, but has high communication strength in a communicable angle range.
The high speed operation of the train can bring an important problem to the train-ground wireless communication system, namely frequent base station switching, and the problem can cause serious reduction of communication intensity and communication experience. The instantaneous communication interruption caused by the switching of the vehicle-mounted wireless equipment between the ground base station access points can seriously affect the quality of real-time service, and particularly, the packet loss and the instantaneous communication interruption caused by the switching can possibly cause the failure of a real-time control system with high requirements on the real-time performance and the reliability of information transmission.
The high effectiveness and reliability of the train-ground wireless communication system are important guarantees of rail transit operation efficiency, so that the research on an effective laboratory simulation test method of the train-ground wireless communication system accurately evaluates and verifies the performance of equipment and the system in advance, and the method has prominent significance for designing the train-ground wireless communication system with high effectiveness and reliability and guaranteeing the operation efficiency. Currently, the following three methods are mainly used for the dynamic switching test of the train-ground wireless communication system:
1. the motor car test is carried out on an operation site, and the specific process comprises the following steps: ground base station access points are erected on one side of an operation line at certain intervals. A handover may occur when a train travels to an overlapping coverage area of an adjacent ground base station access point. The method has the advantages that: the method has the following disadvantages that the method is closest to the switching situation in actual operation: the cost is high, and the test period is long;
2. and (4) setting up an environment in a laboratory, and controlling the vehicle-mounted wireless equipment to switch among the multiple access points by modifying the network identification. The method has the advantages that: the method is simple and easy to realize, and does not need additional hardware equipment. The disadvantages of this method are: does not correspond to the actual handover procedure;
3. the switching of the vehicle-mounted wireless equipment between the access points is controlled by using a variable attenuator, and the specific process comprises the following steps: the strength of the vehicle-mounted wireless equipment for receiving the access point signals is changed by changing the attenuation value of the variable attenuator, so that the vehicle-mounted wireless equipment is switched between the access points. The advantages are that: the change of the intensity of the received signal of the vehicle-mounted equipment in the switching process can be well simulated. The disadvantages are that: the operation is complicated.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a rail transit vehicle-ground communication link switching test method and a rail transit vehicle-ground communication link switching test system.
The purpose of the invention is mainly realized by the following technical scheme:
the invention provides a rail transit vehicle-ground communication link switching test method on one hand, which comprises the following steps:
and 4, processing and analyzing the communication data of the vehicle-mounted communication module and the communication data of the base station communication module.
Preferably, the step 2 is to debug each base station communication module of the ground simulation unit, and the debugging method of a single base station communication module is as follows: starting a single base station communication module and closing the other base station communication modules, rotating and adjusting the vehicle-mounted simulation unit to enable the vehicle-mounted communication module to be communicated with the started base station communication module, and adjusting the started base station communication module to enable the communication intensity to reach a set value; the communication intensity set values of the base station communication modules are consistent.
Preferably, the vehicle-mounted simulation unit is provided with two vehicle-mounted communication modules, one vehicle-mounted communication module is matched with the odd-numbered sequence base station communication module in the ground simulation unit, and the other vehicle-mounted communication module is matched with the even-numbered sequence base station communication module in the ground simulation unit; the communicable ranges of two base station communication modules which are separated from each other have an overlapping area.
Preferably, the step 2 is to debug each two adjacent base station communication modules of the ground simulation unit, and the debugging method is as follows: opening a group of two adjacent base station communication modules and closing the rest base station communication modules, rotating and adjusting the vehicle-mounted simulation unit to enable the two vehicle-mounted communication modules to be respectively communicated with the two opened base station communication modules, and then respectively adjusting the two opened base station communication modules to enable the communication intensity to reach a set value; the communication intensity set values of the base station communication modules are consistent.
The invention provides a rail transit vehicle-ground communication link switching test system, which comprises a central control unit, a vehicle-mounted simulation unit and a ground simulation unit, wherein the vehicle-mounted simulation unit comprises a rotating holder, a vehicle-mounted control module and a vehicle-mounted communication module, the vehicle-mounted control module and the vehicle-mounted communication module are arranged on the rotating holder, the ground simulation unit comprises the ground control module and a plurality of base station communication modules which are arranged at intervals, and communication ranges of adjacent base station communication modules are overlapped; the rotating holder is controlled by the vehicle-mounted control module to drive the vehicle-mounted communication module to rotate in a speed-adjustable mode, the vehicle-mounted communication module is controlled by the vehicle-mounted control module to perform wireless communication with the base station communication module of the ground simulation unit, the base station communication module is controlled by the ground control module to switch the working state of the base station communication module, and the central control unit is used for processing and analyzing communication data of the vehicle-mounted communication module and communication data of the base station communication module.
Preferably, the vehicle-mounted simulation unit is provided with two vehicle-mounted communication modules, one vehicle-mounted communication module is matched with the odd-numbered sequence base station communication module in the ground simulation unit, and the other vehicle-mounted communication module is matched with the even-numbered sequence base station communication module in the ground simulation unit; the communicable ranges of two base station communication modules which are separated from each other have an overlapping area.
In conclusion, the invention has the following beneficial effects: the vehicle-mounted communication module is arranged on the rotating holder, the vehicle-mounted communication module is driven to rotate by controlling the rotating holder to wirelessly communicate with the ground simulation unit base station communication module, and the communication intensity change of the vehicle-mounted terminal and the trackside base station in actual vehicle-ground communication is well simulated, so that the actual vehicle-ground wireless communication switching process is conveniently simulated, the test of a vehicle-ground wireless communication dynamic switching method is conveniently carried out, the operation is convenient, the cost is low, and the simulation degree is high. In addition, different running speeds of the train can be simulated by adjusting the rotating speed of the rotating holder, and the test of dynamic switching of train-ground wireless communication under the conditions of constant speed running and variable speed running of the train can be flexibly carried out.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions and advantages of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of conventional train-ground communication link switching.
FIG. 2 is a flow chart of one embodiment of the method of the present invention.
Fig. 3 is a schematic diagram illustrating a change of communication conditions according to an embodiment of the method of the present invention.
Fig. 4 is a schematic diagram illustrating a change of communication conditions according to an embodiment of the method of the present invention.
FIG. 5 is a schematic block diagram of one embodiment of the system of the present invention.
In the figure: the system comprises a vehicle-mounted simulation unit 1, a ground simulation unit 2, a vehicle-mounted communication module 3, a base station communication module 4, a rotating holder 5, a vehicle-mounted control module 6, a ground control module 7 and a central control unit 8.
Detailed Description
In order to make the objects, technical solutions and advantages disclosed in the embodiments of the present invention more clearly apparent, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the embodiments of the invention and are not intended to limit the embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout.
It should be noted that the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or server that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1, during the running of the train, the relative positions of the vehicle-mounted communication terminal and the trackside base station correspondingly change, and the relative positions of the communicable angle ranges of the vehicle-mounted communication terminal and the trackside base station also correspondingly change, so that the communication conditions of the vehicle-mounted communication terminal and the single trackside base station are in the following order: the communication is impossible, the communication is possible, the communication intensity gradually becomes better, the communication intensity becomes optimal, the communication intensity gradually becomes worse, and the communication is impossible. Based on the communication situation of the vehicle-mounted communication terminal and a single trackside base station, the switching method of the vehicle-mounted communication terminal between two adjacent trackside base stations is generally as follows: when the train is initially in a communication state with the trackside base station A and the trackside base station B becomes communicable and has better communication strength than the trackside base station A along with the running movement of the train, the vehicle-mounted communication terminal is switched to communicate with the trackside base station B.
The communication condition change of the vehicle-mounted communication terminal and the plurality of trackside base stations when the train runs is simulated, and the actual train-ground wireless communication condition can be simulated, so that the dynamic switching test of the train-ground wireless communication is facilitated. Because the train-mounted communication equipment and the trackside base station adopt the directional narrow-wave communication equipment, if two directional narrow-wave communication equipment are arranged in opposite directions, and one directional narrow-wave communication equipment is rotated from 0-180 degrees at the opposite side, the communication conditions of the two directional narrow-wave communication equipment can be realized according to the following sequence: the communication terminal can simulate the change of the communication condition between the vehicle-mounted communication terminal and a single trackside base station.
Based on the principle, the invention provides a rail transit vehicle-ground communication link switching test method, as shown in fig. 2, comprising the following steps:
And 2, debugging the base station communication module 4 of the ground simulation unit 2, wherein the communication range of the adjacent base station communication module 4 has an overlapping area. Specifically, step 2 is to debug each base station communication module 4 of the ground simulation unit 2, and the debugging method of a single base station communication module 4 is as follows: starting a single base station communication module 4 and closing the other base station communication modules 4, rotating and adjusting the vehicle-mounted simulation unit 1 to enable the vehicle-mounted communication module 3 to be capable of communicating with the started base station communication module 4, and then adjusting the antenna alignment of the started base station communication module 4 and the vehicle-mounted communication module 3 to enable the communication intensity to reach a set value; the communication intensity setting values of the base station communication modules 4 are identical.
And 3, controlling the vehicle-mounted simulation unit 1 to rotate within the range of 180 degrees of the horizontal direction of the direction surface facing the ground simulation unit, simultaneously carrying out wireless communication between the vehicle-mounted communication module 3 and the ground simulation unit 2, and switching the working state of each base station communication module 4 in the ground simulation unit 2 according to a set link switching method. It can be understood that the wireless communication between the vehicle-mounted communication module 3 and the ground simulation unit 2 is that the vehicle-mounted communication module 3 sends communication data to the ground simulation unit 2 or the ground simulation unit 2 sends communication data to the vehicle-mounted communication module 3; the operating state of the base station communication module 4 includes listening, receiving and transmitting states.
And 4, processing and analyzing the communication data of the vehicle-mounted communication module 3 and the communication data of the base station communication module 4. It can be understood that the analysis and calculation of the performance indexes such as the time delay, the packet loss rate, the communication transmission rate, and the like of the received communication data compared with the transmission of the communication data are processed and analyzed.
The base station communication modules 4 are debugged by rotating the cloud deck 5, so that each base station communication module 4 respectively reaches a consistent communication intensity set value with the vehicle-mounted communication module 3 in different rotation angle position states, and the communicable ranges of the respective base station communication modules 4 have an overlapping area, as shown in fig. 3, when the rotating tripod head 5 is controlled to drive the vehicle-mounted communication module 3 to rotate to communicate with the ground simulation unit 2, for a single base station communication module 4, the communication conditions are changed according to the order of non-communication, gradually improved communication intensity, optimized communication intensity, gradually reduced communication intensity and non-communication, the communication conditions for all base station communication modules 4 correspond to the overlapping sequential change of the rotation direction of the rotating pan-tilt 5, and the two base station communication modules 4 can communicate with each other, but the communication intensity is good and poor, so that the communication situation change of the vehicle-mounted communication terminal and the plurality of trackside base stations when the train runs is well simulated. In addition, the base station communication module 4 is monitored, and the receiving/sending state is controlled to be switched according to a link switching method, so that the vehicle-mounted communication module 3 and one base station communication module 4 are in a communication state at a certain moment in rotation, the vehicle-mounted communication module 3 is continuously driven to rotate along with the rotating holder 5, the adjacent base station communication module 4 is switched to be in communication and the communication intensity is higher than that of the current base station communication module 4, the vehicle-mounted communication module 3 is switched to be in communication with the base station communication module 4 with the high communication intensity, the actual vehicle-ground wireless communication switching process can be simulated conveniently, the test of the vehicle-ground wireless communication dynamic switching method can be conveniently carried out, the operation is convenient, the cost is low, and the simulation degree is high. In addition, different running speeds of the train can be simulated by adjusting the rotating speed of the rotating holder 5, so that the test of dynamic switching of train-ground wireless communication under the conditions of constant speed running and variable speed running of the train can be flexibly carried out.
As the disconnection before disconnection of the single link switching and the disconnection after switching have the risk of communication data packet loss, the existing vehicle-ground wireless communication method with the multi-link soft switching is suitable for the test of the vehicle-ground wireless communication multi-link soft switching, as shown in fig. 4, in one embodiment of the method in the specification, a vehicle-mounted simulation unit 1 is provided with two vehicle-mounted communication modules 3, one vehicle-mounted communication module 3 is matched with a base station communication module 4 in an odd-numbered sequence in a ground simulation unit 2, and the other vehicle-mounted communication module 3 is matched with a base station communication module 4 in an even-numbered sequence in the ground simulation unit 2; the communicable ranges of two base station communication modules 4 that are separated by each other have an overlapping area.
Correspondingly, step 2 is to debug each two adjacent base station communication modules 4 of the ground simulation unit 2, and the debugging method is as follows: a group of two adjacent base station communication modules 4 is opened, the other base station communication modules 4 are closed, the vehicle-mounted simulation unit 1 is adjusted in a rotating mode to enable the two vehicle-mounted communication modules 3 to be capable of communicating with the two opened base station communication modules 4 respectively, and then the two opened base station communication modules 4 are adjusted to be aligned with the antennas of the two vehicle-mounted communication modules 3 respectively to enable the communication intensity to reach a set value; the communication intensity setting values of the base station communication modules 4 are identical.
The base station communication module 4 monitors, controls and switches the receiving/sending states according to a link switching method, two vehicle-mounted communication modules 3 are respectively in a communication state with a group of two adjacent base station communication modules 4 at a certain moment in rotation, the vehicle-mounted communication modules 3 are continuously driven to rotate along with the rotating cradle head 5, the communication intensity of the first vehicle-mounted communication module 3 and the currently communicated base station communication module 4 is changed to be worse than that of the vehicle-mounted communication module 3 and the corresponding base station communication module 4 in the next group, and the situation of the second vehicle-mounted communication module 3 is opposite, the first vehicle-mounted communication module 3 is switched to communicate with the next group of corresponding base station communication modules 4, the second vehicle-mounted communication module 3 keeps the original link communication, therefore, the actual vehicle-ground wireless communication multilink soft switching process is simulated, and the test of the vehicle-ground wireless communication multilink soft switching method is facilitated.
The invention also provides a rail transit vehicle-ground communication link switching test system, which comprises a central control unit 8, a vehicle-mounted simulation unit 1 and a ground simulation unit 2, wherein the vehicle-mounted simulation unit 1 comprises a rotating holder 5, a vehicle-mounted control module 6 and a vehicle-mounted communication module 3 which are arranged on the rotating holder 5, the ground simulation unit 2 comprises a ground control module 7 and a plurality of base station communication modules 4 which are arranged at intervals, and the communication ranges of the adjacent base station communication modules 4 are overlapped; the rotating holder 5 is controlled by the vehicle-mounted control module 3 to drive the vehicle-mounted communication module 3 to rotate at an adjustable speed, the vehicle-mounted communication module 3 is controlled by the vehicle-mounted control module 6 to perform wireless communication with the base station communication module 4 of the ground simulation unit 2, the base station communication module 4 is controlled by the ground control module 7 to switch the working state of the base station communication module, and the central control unit 8 is used for processing and analyzing communication data of the vehicle-mounted communication module 3 and communication data of the base station communication module 4.
In order to be suitable for the test of vehicle-ground wireless communication multilink soft handover, in one embodiment of the system of the specification, the vehicle-mounted simulation unit 1 is provided with two vehicle-mounted communication modules 3, one vehicle-mounted communication module 3 is matched with the odd-numbered sequence base station communication module 4 in the ground simulation unit 2, and the other vehicle-mounted communication module 3 is matched with the even-numbered sequence base station communication module 4 in the ground simulation unit 2; the communicable ranges of two base station communication modules 4 that are separated by each other have an overlapping area.
The test flow is as follows: loading a link switching method to be tested in a ground control module 7, then loading communication data to be transmitted to a sending end (a communication module of a vehicle-mounted simulation unit 1 or a ground simulation unit 2) through a central control unit 8, synchronously controlling a rotating cradle head 5 to rotate, controlling a base station communication module 4 to switch the working state of the base station communication module 4 according to the link switching method, communicating the vehicle-mounted communication module 3 with the base station communication module 4 in the ground simulation unit 2, and then carrying out calculation analysis on performance parameters such as time delay, packet loss rate, communication transmission rate and the like on the communication data of a receiving end (the communication module of the vehicle-mounted simulation unit 1 or the ground simulation unit 2 and relevant to the selection of the sending end) and the communication data to be transmitted by the central control unit 8, thereby obtaining a test result of the loaded link switching method.
It should be noted that: the precedence order of the above embodiments of the present invention is only for description, and does not represent the merits of the embodiments. While certain embodiments of the present disclosure have been described above, other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A rail transit vehicle-ground communication link switching test method is characterized by comprising the following steps:
step 1, arranging a vehicle-mounted simulation unit (1) and a ground simulation unit (2) in opposite directions at two sides in a test darkroom, wherein the vehicle-mounted simulation unit (1) comprises a vehicle-mounted communication module (3), and the ground simulation unit (2) comprises a plurality of base station communication modules (4) arranged at intervals;
step 2, debugging a base station communication module (4) of the ground simulation unit (2), wherein the communication range of the adjacent base station communication module (4) has an overlapping area;
step 3, controlling the vehicle-mounted simulation unit (1) to rotate within a range of 180 degrees of the horizontal direction of the direction surface facing the ground simulation unit, simultaneously carrying out wireless communication between the vehicle-mounted communication module (3) and the ground simulation unit (2), and switching the working state of each base station communication module (4) in the ground simulation unit (2) according to a set link switching method;
and 4, processing and analyzing the communication data of the vehicle-mounted communication module (3) and the communication data of the base station communication module (4).
2. The rail transit vehicle-ground communication link switching test method according to claim 1, wherein the step 2 is to debug each base station communication module (4) of the ground simulation unit (2), and the debugging method of a single base station communication module (4) is as follows: opening a single base station communication module (4) and closing the other base station communication modules (4), rotating and adjusting the vehicle-mounted simulation unit (1) to enable the vehicle-mounted communication module (3) to be communicated with the opened base station communication module (4), and adjusting the opened base station communication module (4) to enable the communication intensity to reach a set value; the communication intensity set values of the base station communication modules (4) are consistent.
3. The rail transit vehicle-ground communication link switching test method according to claim 1, wherein the vehicle-mounted simulation unit (1) is provided with two vehicle-mounted communication modules (3), one vehicle-mounted communication module (3) is matched with an odd-numbered sequence of base station communication modules (4) in the ground simulation unit (2), and the other vehicle-mounted communication module (3) is matched with an even-numbered sequence of base station communication modules (4) in the ground simulation unit (2); the communicable ranges of two base station communication modules (4) which are separated from each other have an overlapping area.
4. The rail transit vehicle-ground communication link switching test method according to claim 3, wherein the step 2 is to debug each two adjacent base station communication modules (4) of the ground simulation unit (2), and the debugging method is as follows: a group of two adjacent base station communication modules (4) is opened, the other base station communication modules (4) are closed, the vehicle-mounted simulation unit (1) is adjusted in a rotating mode to enable the two vehicle-mounted communication modules (3) to be capable of communicating with the two opened base station communication modules (4) respectively, and then the two opened base station communication modules (4) are adjusted respectively to enable the communication intensity to reach a set value; the communication intensity set values of the base station communication modules (4) are consistent.
5. A rail transit vehicle-ground communication link switching test system is characterized by comprising a central control unit (8), a vehicle-mounted simulation unit (1) and a ground simulation unit (2), wherein the vehicle-mounted simulation unit (1) comprises a rotating holder (5), a vehicle-mounted control module (6) and a vehicle-mounted communication module (3), the vehicle-mounted control module and the vehicle-mounted communication module are arranged on the rotating holder (5), the ground simulation unit (2) comprises a ground control module (7) and a plurality of base station communication modules (4) which are arranged at intervals, and communication ranges of adjacent base station communication modules (4) are overlapped; the rotating holder (5) is controlled by the vehicle-mounted control module (3) to drive the vehicle-mounted communication module (3) to rotate at an adjustable speed, the vehicle-mounted communication module (3) is controlled by the vehicle-mounted control module (6) to perform wireless communication with the base station communication module (4) of the ground simulation unit (2), the base station communication module (4) is controlled by the ground control module (7) to switch the working state of the base station communication module, and the central control unit (8) is used for processing and analyzing communication data of the vehicle-mounted communication module (3) and communication data of the base station communication module (4).
6. A rail transit vehicle-ground communication link switching test system according to claim 4, characterized in that the vehicle-mounted simulation unit (1) is provided with two vehicle-mounted communication modules (3), one vehicle-mounted communication module (3) being matched with an odd-numbered order of base station communication modules (4) in the ground simulation unit (2), the other vehicle-mounted communication module (3) being matched with an even-numbered order of base station communication modules (4) in the ground simulation unit (2); the communicable ranges of two base station communication modules (4) which are separated from each other have an overlapping area.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114286410A (en) * | 2021-12-31 | 2022-04-05 | 南京国博电子股份有限公司 | Base station switching method based on train position and driving direction |
| CN114501516A (en) * | 2022-02-14 | 2022-05-13 | 成都市以太节点科技有限公司 | Indoor test method and system for train-ground wireless communication switching |
| CN114866449A (en) * | 2022-04-29 | 2022-08-05 | 重庆长安汽车股份有限公司 | Finished automobile wireless communication test system and test method thereof |
| CN115442849A (en) * | 2022-11-09 | 2022-12-06 | 成都市以太节点科技有限公司 | Differentiated communication method and device for railway vehicle-mounted millimeter wave terminal and storage medium |
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| CN115442849A (en) * | 2022-11-09 | 2022-12-06 | 成都市以太节点科技有限公司 | Differentiated communication method and device for railway vehicle-mounted millimeter wave terminal and storage medium |
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