Multipath interference detection method and device for wireless train control system

Abstract

The present invention discloses a method and device for detecting multipath interference in a wireless train control system, comprising: obtaining first and second operation control information of a train, and operation information sent by the train; the operation information includes the train's location information and third operation control information, the third operation control information being received by the train from a base station; when the first and third operation control information are inconsistent, determining a first parameter value of a signal transmitting the first operation control information and a second parameter value of a signal transmitting the second operation control information; and when the first and second parameter values are within a preset range, sending a multipath interference alarm and the train's location information to the base station. The present invention sends a multipath interference alarm and the train's location information to the base station when the first and second parameter values are within the preset range, thereby achieving accurate detection and precise positioning of multipath interference in the wireless train control system.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a method and device for detecting multipath interference in a wireless train control system. Background Art

[0002] Multipath interference is common between repeater stations in railway wireless train control systems, causing abnormal inter-stage switching. Currently, the only solution is to experimentally adjust repeater stations along the line based on the principles of multipath interference, and the effectiveness can only be determined after a period of train operation.

[0003] The existing technology sets up fixed-point train control information monitoring at the base station, but can only determine whether there is a problem based on the transmission of user information, and cannot determine where multipath interference occurs on the train track.

[0004] In summary, there is an urgent need for a multipath interference detection method for a wireless train control system to solve the problems existing in the above-mentioned prior art. Summary of the Invention

[0005] An embodiment of the present invention provides a method for detecting multipath interference in a wireless train control system, for efficiently and accurately detecting and locating multipath interference in a wireless train control system. The method includes:

[0006] Obtaining first operation control information, second operation control information, and operation information sent by the train; the first operation control information is sent by the base station to the train, and the second operation control information is sent by the repeater to the train; the operation information includes the train's location information and third operation control information, and the third operation control information is received by the train from the base station;

[0007] When the first operation control information and the third operation control information are inconsistent, determining a first parameter value of a signal for sending the first operation control information and a second parameter value of a signal for sending the second operation control information;

[0008] When the first parameter value and the second parameter value are within a preset range, a multipath interference alarm and train location information are sent to a base station.

[0009] An embodiment of the present invention further provides a multipath interference detection device for a wireless train control system, for efficiently and accurately detecting and locating multipath interference in a wireless train control system. The device includes:

[0010] an acquisition module, configured to acquire first and second operation control information of a train, as well as operation information sent by the train; the first operation control information is sent by a base station to the train, and the second operation control information is sent by a repeater to the train; the operation information includes the train's position information and third operation control information, and the third operation control information is received by the train from the base station;

[0011] A processing module is used to determine a first parameter value of a signal for sending the first operation control information and a second parameter value of a signal for sending the second operation control information when the first operation control information is inconsistent with the third operation control information; and when the first parameter value and the second parameter value are within a preset range, send a multipath interference alarm and the train position information to a base station.

[0012] An embodiment of the present invention further provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the above-mentioned multipath interference detection method for a wireless train control system is implemented.

[0013] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the multipath interference detection method for a wireless train control system is implemented.

[0014] An embodiment of the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the computer program implements the above-mentioned multipath interference detection method for a wireless train control system.

[0015] In an embodiment of the present invention, first operation control information, second operation control information and operation information sent by the train are obtained, the first operation control information is sent by the base station to the train, and the second operation control information is sent by the repeater to the train; the operation information includes the position information of the train and third operation control information, and the third operation control information is received by the train from the base station; when the first operation control information and the third operation control information are inconsistent, the first parameter value of the signal for sending the first operation control information and the second parameter value of the signal for sending the second operation control information are determined, and when the first parameter value and the second parameter value are within a preset range, a multipath interference alarm and the position information of the train are sent to the base station. Compared with the prior art, when the first parameter value and the second parameter value are within the preset range, a multipath interference alarm and the position information of the train are sent to the base station, thereby realizing accurate detection and precise positioning of multipath interference in the wireless train control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0017] Figure 1 The system framework of the multipath interference detection method for a wireless train control system provided by the present invention;

[0018] Figure 2 A schematic flow chart of a multipath interference detection method for a wireless train control system provided by the present invention;

[0019] Figure 3 A schematic diagram of a multipath interference detection method for a wireless train control system provided by the present invention;

[0020] Figure 4 A schematic diagram of a multipath interference detection method for a wireless train control system provided by the present invention;

[0021] Figure 5 This is a structural diagram of the multipath interference detection device for a wireless train control system provided by the present invention. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0023] The multipath interference detection method for a wireless train control system provided by the embodiment of the present invention can be applied to Figure 1 In the system architecture shown, the system architecture includes a base station 100 , a train 200 , a repeater 300 , and a detection device 400 .

[0024] In the embodiment of the present invention, the detection device 400 is used to obtain the first operation control information and the second operation control information of the train 200 and the operation information sent by the train 200.

[0025] It should be noted that the first operation control information is sent by the base station 100 to the train 200, and the second operation control information is sent by the repeater 300 to the train 200; the operation information includes the train's location information and the third operation control information, and the third operation control information is received by the train 200 from the base station 100.

[0026] The detection device 400 is also used to determine the first parameter value of the signal for sending the first operation control information and the second parameter value of the signal for sending the second operation control information when the first operation control information is inconsistent with the third operation control information, and to send a multipath interference alarm and the train position information to the base station 100 when the first parameter value and the second parameter value are within a preset range.

[0027] In this solution, when the first and third operation control information are inconsistent, the system determines whether to send a multipath interference alert to the base station based on whether the first and second parameter values are within a preset range. This improves the efficiency and accuracy of multipath interference detection in the wireless train control system. Furthermore, the system transmits train location information during the alert, enabling precise positioning of the multipath interference detection system.

[0028] It should be noted that Figure 1 This is only an example of the system architecture of an embodiment of the present invention, and the present invention does not make any specific limitation to this.

[0029] Figure 2 A flowchart corresponding to a multipath interference detection method for a wireless train control system provided by an embodiment of the present invention is shown in FIG. Figure 2 As shown, the method includes:

[0030] Step 201: Acquire the first operation control information, the second operation control information and the operation information sent by the train.

[0031] It should be noted that the first operation control information is sent by the base station to the train, and the second operation control information is sent by the repeater to the train; the operation information includes the train's location information and third operation control information, and the third operation control information is received by the train from the base station.

[0032] In this embodiment of the present invention, when a base station transmits information to a train, the base station sends first operation control information to the train. The base station can also transmit information to the train via a repeater. The repeater amplifies the signal sent by the base station to generate second operation control information, which the repeater then sends to the train.

[0033] In a possible implementation, the base station intercepts the first operation control information during information transmission with the train, and the repeater intercepts the second operation control information during information transmission with the train.

[0034] In another possible implementation, multiple path signals from one signal source are parsed, and the same-source signals are parsed to obtain the first operation control information and the second operation control information.

[0035] It should be noted that the same-source signals contain the same information but have different signal strengths and delays.

[0036] Step 202: When the first operation control information and the third operation control information are inconsistent, determine a first parameter value for a signal sending the first operation control information and a second parameter value for a signal sending the second operation control information.

[0037] In the embodiment of the present invention, when the base station is transmitting information to the train, the base station sends the first operation control information to the train.

[0038] The first operation control information is compared with the third operation control information received by the train from the base station.

[0039] In a possible implementation, after the first operation control information and the third operation control information are acquired, multiple bits of the first operation control information and the third operation control information are grouped according to preset lengths and then compared one by one.

[0040] For example, the first operation control information is 1100 0110 0101 0010; and the third operation control information is 1100 1111 0010 1101.

[0041] The first operation control information is grouped into 4 bits, and the first group is 1100.

[0042] The third operation control information is grouped into 4 bits, and the first group is 1100.

[0043] The first group of the first operation control information is the same as the first group of the third operation control information, and the comparison is continued.

[0044] The first operation control information is grouped into 4 bits, and the second group is 0110.

[0045] The third operation control information is grouped into 4 bits, and the second group is 1111.

[0046] If the second group of the first operation control information is different from the second group of the third operation control information, the first operation control information is inconsistent with the third operation control information.

[0047] Step 203: When the first parameter value and the second parameter value are within a preset range, a multipath interference alarm and train location information are sent to the base station.

[0048] In this solution, when the first and third operation control information are inconsistent, the system determines whether to send a multipath interference alert to the base station based on whether the first and second parameter values are within a preset range. This improves the efficiency and accuracy of multipath interference detection in the wireless train control system. Furthermore, the system transmits train location information during the alert, enabling precise positioning of the multipath interference detection system.

[0049] In a possible implementation manner, the first parameter value includes signal strength and signal delay for sending the first operation control information; and the second parameter information includes signal strength and signal delay for sending the second operation control information.

[0050] It should be noted that the first parameter value may further include phase information for sending the first operation control information, and the second parameter value may further include phase information for sending the first operation control information, which is not specifically limited in the embodiment of the present invention.

[0051] In step 203 of an embodiment of the present invention, when the difference between the signal strength in the first parameter value and the signal strength in the second parameter value is less than a first threshold, and the difference between the signal delay in the first parameter value and the signal delay in the second parameter value is greater than a second threshold, a multipath interference alarm and the train position information are sent to the base station.

[0052] like Figure 3 As shown, a train is traveling on a track. During information transmission between the base station and the train, the base station transmits first operation control information f1 to the train. The base station can also transmit information to the train via a repeater. The signal sent by the base station is amplified by the repeater to generate second operation control information f2, which the repeater then transmits to the train.

[0053] In the embodiment of the present invention, the first parameter value includes the signal strength P1 and signal delay t1 for sending the first operation control information f1; the second parameter information includes the signal strength P2 and signal delay t2 for sending the second operation control information f2.

[0054] Due to different paths and media, P1, P2, t1, and t2 are all changing.

[0055] When |P1-P2| is less than a first threshold and |t1-t2| is greater than a second threshold, a multipath interference alarm and train location information are sent to the base station.

[0056] In this solution, when the first and third operation control information are inconsistent, the system determines whether to send a multipath interference alert to the base station based on whether the first and second parameter values are within a preset range. This improves the efficiency and accuracy of multipath interference detection in the wireless train control system. Furthermore, the system transmits train location information during the alert, enabling precise positioning of the multipath interference detection system.

[0057] In a possible implementation, the first threshold value is in a range of [9, 12], and the unit is decibel; the second threshold value is in a range of [9, 12], and the unit is microsecond.

[0058] For example, when |P1-P2| is less than 12 decibels and |t1-t2| is greater than 12 microseconds, a multipath interference alarm and train location information are sent to the base station.

[0059] like Figure 4 As shown in the figure, a train is traveling on the track. During information transmission between the base station and the train, the base station sends signal f1 to the train. The base station can also transmit information to the train through a repeater. The signal sent by the base station is amplified by repeater A to generate signal f2, which is then transmitted to the train. The signal sent by the base station is amplified by repeater B to generate signal f3, which is then transmitted to the train.

[0060] For the base station and repeater A, the first parameter value includes the signal strength P1 and signal delay t1 of sending f1; the second parameter information includes the signal strength P2 and signal delay t2 of sending f2.

[0061] Due to different paths and media, P1, P2, t1, and t2 are all changing.

[0062] When |P1-P2| is less than a first threshold and |t1-t2| is greater than a second threshold, a multipath interference alarm and train location information are sent to the base station.

[0063] For the base station and repeater B, the first parameter value includes the signal strength P1 and signal delay t1 of sending f1; the second parameter information includes the signal strength P3 and signal delay t3 of sending f3.

[0064] Due to different paths and media, P1, P3, t1, and t3 are all changing.

[0065] When |P1-P3| is less than a first threshold and |t1-t3| is greater than a second threshold, a multipath interference alarm and train location information are sent to the base station.

[0066] This solution sends a multipath interference warning and train location information to the base station when |P1-P2| is less than a first threshold and |t1-t2| is greater than a second threshold. It also sends a multipath interference warning and train location information to the base station when |P1-P3| is less than the first threshold and |t1-t3| is greater than the second threshold. This improves the efficiency and accuracy of multipath interference detection in the wireless train control system. Transmitting train location information during an alarm enables precise positioning for multipath interference detection in the wireless train control system.

[0067] The present invention also provides a multipath interference detection device for a wireless train control system, as described in the following embodiments. Figure 5 As shown, the device includes:

[0068] Acquisition module 501 is configured to acquire first and second operation control information of a train, as well as operation information sent by the train; the first operation control information is sent by a base station to the train, and the second operation control information is sent by a repeater to the train; the operation information includes the train's location information and third operation control information, which is received by the train from the base station;

[0069] The processing module 502 is used to determine a first parameter value of a signal for sending the first operation control information and a second parameter value of a signal for sending the second operation control information when the first operation control information is inconsistent with the third operation control information; and when the first parameter value and the second parameter value are within a preset range, send a multipath interference alarm and the train position information to the base station.

[0070] In the embodiment of the present invention, the processing module 502 is specifically configured to:

[0071] The first parameter value includes the signal strength and signal delay for sending the first operation control information; the second parameter information includes the signal strength and signal delay for sending the second operation control information.

[0072] In the embodiment of the present invention, the processing module 502 is specifically configured to:

[0073] When the difference between the signal strength in the first parameter value and the signal strength in the second parameter value is less than the first threshold, and the difference between the signal delay in the first parameter value and the signal delay in the second parameter value is greater than the second threshold, a multipath interference alarm and the train location information are sent to the base station.

[0074] In the embodiment of the present invention, the processing module 502 is specifically configured to:

[0075] The value range of the first threshold is [9, 12], and the unit is decibel; the value range of the second threshold is [9, 12], and the unit is microsecond.

[0076] In the embodiment of the present invention, the processing module 502 is further configured to:

[0077] After obtaining the first operation control information and the third operation control information, multiple bits of the first operation control information and the third operation control information are grouped according to preset lengths and then compared one by one.

[0078] Since the principle of solving the problem by this device is similar to that of the multipath interference detection method of the wireless train control system, the implementation of this device can refer to the implementation of the multipath interference detection method of the wireless train control system, and the repeated parts will not be repeated.

[0079] An embodiment of the present invention further provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the above-mentioned multipath interference detection method for a wireless train control system is implemented.

[0080] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the multipath interference detection method for a wireless train control system is implemented.

[0081] An embodiment of the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the computer program implements the above-mentioned multipath interference detection method for a wireless train control system.

[0082] In an embodiment of the present invention, first operation control information, second operation control information and operation information sent by the train are obtained, the first operation control information is sent by the base station to the train, and the second operation control information is sent by the repeater to the train; the operation information includes the position information of the train and third operation control information, and the third operation control information is received by the train from the base station; when the first operation control information and the third operation control information are inconsistent, the first parameter value of the signal for sending the first operation control information and the second parameter value of the signal for sending the second operation control information are determined, and when the first parameter value and the second parameter value are within a preset range, a multipath interference alarm and the position information of the train are sent to the base station. Compared with the prior art, when the first parameter value and the second parameter value are within the preset range, a multipath interference alarm and the position information of the train are sent to the base station, thereby realizing accurate detection and precise positioning of multipath interference in the wireless train control system.

[0083] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0084] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0085] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0086] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0087] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for detecting multipath interference in a wireless train control system, characterized in that: include: Obtaining first operation control information, second operation control information, and operation information sent by the train; The first operation control information is sent by the base station to the train, and the second operation control information is sent by the repeater to the train; the operation information includes the train's position information and third operation control information, and the third operation control information is received by the train from the base station; When the first operation control information and the third operation control information are inconsistent, determining a first parameter value of a signal for sending the first operation control information and a second parameter value of a signal for sending the second operation control information; the first parameter value includes a signal strength and a signal delay for sending the first operation control information; and the second parameter value includes a signal strength and a signal delay for sending the second operation control information; When the first parameter value and the second parameter value are within a preset range, sending a multipath interference alarm and train location information to a base station; The first operation control information is sent by the base station to the train, including: during the information transmission between the base station and the train, the base station sends the first operation control information to the train; The second operation control information is sent by the repeater to the train, including: the signal sent by the base station is amplified by the repeater to obtain the second operation control information, and the repeater sends the second operation control information to the train; The method further includes: parsing homologous signals to obtain first operation control information and second operation control information; wherein the homologous signals contain the same information but have different signal strengths and delays.

2. The multipath interference detection method for a wireless train control system according to claim 1, wherein: When the first parameter value and the second parameter value are within a preset range, sending a multipath interference alarm and train location information to a base station includes: When the difference between the signal strength in the first parameter value and the signal strength in the second parameter value is less than the first threshold, and the difference between the signal delay in the first parameter value and the signal delay in the second parameter value is greater than the second threshold, a multipath interference alarm and the train location information are sent to the base station.

3. The multipath interference detection method for a wireless train control system according to claim 2, wherein: The value range of the first threshold is [9, 12], and the unit is decibel; the value range of the second threshold is [9, 12], and the unit is microsecond.

4. The multipath interference detection method for a wireless train control system according to claim 1, wherein: Also includes: After obtaining the first operation control information and the third operation control information, multiple bits of the first operation control information and the third operation control information are grouped according to preset lengths and then compared one by one.

5. A multipath interference detection device for a wireless train control system, characterized in that: include: An acquisition module, configured to acquire the first operation control information, the second operation control information, and the operation information sent by the train; The first operation control information is sent by the base station to the train, and the second operation control information is sent by the repeater to the train; the operation information includes the train's position information and third operation control information, and the third operation control information is received by the train from the base station; a processing module, configured to determine, when the first operation control information and the third operation control information are inconsistent, a first parameter value of a signal for sending the first operation control information and a second parameter value of a signal for sending the second operation control information; When the first parameter value and the second parameter value are within a preset range, a multipath interference alarm and train location information are sent to a base station; the first parameter value includes the signal strength and signal delay for sending the first operation control information; the second parameter value includes the signal strength and signal delay for sending the second operation control information; The acquisition module is specifically configured to: during information transmission between the base station and the train, the base station sends the first operation control information to the train; after the signal sent by the base station is amplified by the repeater, the second operation control information is obtained, and the repeater sends the second operation control information to the train; The device is further configured to parse homologous signals to obtain first operation control information and second operation control information; wherein the homologous signals contain the same information but have different signal strengths and delays.

6. The multipath interference detection device for a wireless train control system according to claim 5, wherein: The processing module is specifically used for: When the difference between the signal strength in the first parameter value and the signal strength in the second parameter value is less than the first threshold, and the difference between the signal delay in the first parameter value and the signal delay in the second parameter value is greater than the second threshold, a multipath interference alarm and the train location information are sent to the base station.

7. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the method according to any one of claims 1 to 4 is implemented.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

9. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

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