Special detection equipment for railway DRTD system

Abstract

The invention discloses special detection equipment for a railway DRTD system, which can effectively realize the detection of the railway DRTD system, can collect detection data, fills the blank of the detection equipment for the railway DRTD system, improves the data level of the railway DRTD system, supports the operation and maintenance of the railway DRTD system, and specifically, aims at the communication process of the railway DRTD system on the basis of the performance and bearing service characteristics of the railway DRTD system. According to the method, a characteristic air interface command is captured, a DRTD performance detection (wireless access performance and mobility performance), voice call service and data transmission service detection data acquisition scheme is provided, railway DRTD system performance and service detection data acquisition is realized, and a large amount of reference data can be provided for a railway DRTD system.

Description

Technical Field

[0001] The present invention relates to the technical field of railway system detection, and in particular to a special detection device for a railway DRTD system. Background Art

[0002] At present, the Ministry of Industry and Information Technology has stopped approving wireless communication equipment in the 450MHz frequency band for railways, and allocated the 400MHz frequency band to railways for dedicated digital wireless communication. Therefore, the railway has developed a digital radio communication system for train dispatching (DRTD) to meet the application needs of the wireless train dispatching system. The DRTD system realizes communication between trains and station duty rooms, dispatching centers or other trains, and can provide functions such as individual calls and group calls in "big triangles" and "small triangles", integrating voice dispatching and data dispatching services and supporting encrypted communication. The DRTD system has completed the preparation of system technical conditions, technical verification, equipment development and interoperability testing between equipment, and has completed the trial assessment work. During the one-year trial assessment, the DRTD system operated stably, functioned normally and performed well.

[0003] The DRTD system has completed trial assessment and will soon be widely used in railway dispatching communications. The DRTD system will then enter the daily operation and maintenance stage. According to the daily operation and maintenance mode of the railway communication network, the operation and maintenance of the DRTD system relies on daily inspections of the system by detection equipment. Therefore, the development of special detection equipment for the railway DRTD system and the construction of detection data collection methods are issues that the railway communication network maintenance department will soon face and need to be solved urgently.

[0004] The Chinese invention patent "GSM-R Detection System and Detection Method" with patent number ZL201110417539.3 provides a railway GSM-R detection system and detection method. The GSM-R detection system is divided into an electromagnetic environment and field strength test subsystem, a service quality test subsystem, an application function test subsystem and a synchronous positioning subsystem. The electromagnetic environment and field strength test subsystem equipment is composed. However, this method is only used for the detection of railway GSM-R systems. There is little description of the detection method, and the detection data collection method is not mentioned. More importantly, this method cannot be applied to railway DRTD system detection.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a special detection equipment for railway DRTD system, which can effectively realize railway DRTD system detection and collect detection data, fill the gap of railway DRTD system detection equipment, improve the data level of railway DRTD system, and support the operation and maintenance of railway DRTD system.

[0007] The objective of the present invention is achieved through the following technical solutions:

[0008] A special detection device for railway DRTD system, comprising: a controller and two test channel machines; wherein:

[0009] The controller is used to control the two test channel machines to respectively initiate DRTD system voice call service state detection and data transmission service state detection, collect corresponding service state detection data, and perform DRTD system performance detection by capturing characteristic air interface commands in the communication process with the DRTD system, and collect corresponding performance detection data;

[0010] The two test channel machines are responsible for performing corresponding tests on the DRTD system under the control of the controller, and realize data transmission and reception between the controller and the DRTD system during the test process.

[0011] It can be seen from the technical solution provided by the present invention that a railway DRTD system-specific detection equipment is proposed for the railway DRTD system communication process and the services it carries. Based on the railway DRTD system performance and the characteristics of the services it carries, the railway DRTD system communication process is targeted at, and characteristic air interface commands are captured, and a DRTD performance detection (wireless access performance, mobility performance), voice call service and data transmission service detection data collection solution is proposed to realize the railway DRTD system performance and service detection data collection, which can provide a large amount of reference data for the railway DRTD system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0013] Figure 1 A schematic diagram of a railway DRTD system dedicated detection device provided by an embodiment of the present invention;

[0014] Figure 2 A schematic diagram of voice call service status detection provided by an embodiment of the present invention;

[0015] Figure 3 This is a schematic diagram of the connection structure of the controller, test channel machine and DRTD system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0017] First, the terms that may be used in this article are explained as follows:

[0018] The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

[0019] The term "consisting of..." means excluding any technical feature elements not explicitly listed. If this term is used in a claim, it will make the claim closed, so that it does not contain technical feature elements other than the technical feature elements explicitly listed, except for the conventional impurities related to them. If this term only appears in a clause of a claim, it only limits the elements explicitly listed in the clause, and the elements recorded in other clauses are not excluded from the overall claim.

[0020] A railway DRTD system special detection equipment provided by the present invention is described in detail below. The contents not described in detail in the embodiments of the present invention belong to the prior art known to professional and technical personnel in the field. If the specific conditions are not specified in the embodiments of the present invention, the conditions are carried out according to the conventional conditions in the field or the conditions recommended by the manufacturer. If the manufacturers are not specified in the reagents or instruments used in the embodiments of the present invention, they are all conventional products that can be purchased commercially.

[0021] like Figure 1 As shown, a railway DRTD system dedicated detection device provided by an embodiment of the present invention mainly includes: a controller and two test channel machines; wherein:

[0022] The controller is used to control the two test channel machines to respectively initiate DRTD system voice call service state detection and data transmission service state detection, collect corresponding service state detection data, and perform DRTD system performance detection by capturing characteristic air interface commands in the communication process with the DRTD system, and collect corresponding performance detection data;

[0023] The two test channel machines are responsible for performing corresponding tests on the DRTD system under the control of the controller, and realize data transmission and reception between the controller and the DRTD system during the test process.

[0024] In addition, it also includes: a 400MHz frequency band antenna configured for each test channel machine.

[0025] In addition, it also includes: a power supply unit for providing working power to the controller and two test channel machines.

[0026] The present invention proposes a railway DRTD system-specific detection device for the railway DRTD system communication process and the services it carries. Based on the railway DRTD system performance and the characteristics of the services it carries, the railway DRTD system communication process is targeted, characteristic air interface commands are captured, and a DRTD performance detection (wireless access performance, mobility performance), voice call service and data transmission service detection data collection scheme is proposed, thereby realizing the railway DRTD system performance and service detection data collection, and can provide a large amount of reference data for the railway DRTD system.

[0027] In order to more clearly demonstrate the technical solution and technical effects provided by the present invention, the device provided by the embodiment of the present invention is described in detail with reference to a specific embodiment below.

[0028] 1. General introduction of the equipment.

[0029] See also Figure 1 The equipment mainly includes: a controller, two test channel machines, a power supply unit and two 400MHz frequency bands. The power supply unit input power is 220V AC, which provides 12V DC power for the controller and the test channel machine respectively. Each test channel machine is connected to a 400MHz frequency band antenna separately. The controller is connected to the two test channel machines through the RS232 serial port.

[0030] Among them, the controller is responsible for controlling the test channel machine to implement DRTD network access, location update, voice call and data transmission communication processes, and capturing characteristic signaling during the communication process to obtain monitoring data.

[0031] Test channel machine and antenna: responsible for receiving the communication process control data sent by the controller, encapsulating the data into CSBK data packets and forwarding them to the DRTD system, and receiving the data sent by the DRTD system and forwarding them to the controller.

[0032] Power supply unit: responsible for providing working power for the controller and test channel machine, and also has power protection functions such as power overvoltage, overcurrent, short circuit protection, surge protection, high and low temperature protection, etc.

[0033] The device mainly has the following functions:

[0034] (1) DRTD system service status detection, including: DRTD system voice call and data transmission service status timeliness and effectiveness detection.

[0035] (2) DRTD system performance testing, including: DRTD system wireless access and mobility performance timeliness and effectiveness testing.

[0036] (3) Automatic elimination of detection data, including: automatic elimination of invalid samples of DRTD system performance and service detection caused by DRTD system deregistration and location update.

[0037] The main working principle of the equipment is as follows: the DRTD system is a time division system, and the air interface provides at most two time slots, that is, two wireless channels. In view of this, the railway DRTD system dedicated detection equipment is equipped with two test channel machines to simultaneously perform DRTD system performance and service status detection. After the equipment is turned on, the railway DRTD system dedicated detection equipment automatically completes network access and authentication according to the standard communication process of the railway DRTD system and successfully registers the DRTD system to complete the test preparation and enter the standby state. After receiving the test command, the controller simultaneously controls the two test channel machines to initiate DRTD system voice call and data transmission service status detection respectively, that is, each test channel machine is responsible for a service status detection alone. In order to improve the detection efficiency, the railway DRTD system dedicated detection equipment synchronously monitors and records the DRTD system air interface commands during the service status detection process to capture the characteristic air interface commands to complete the DRTD system performance detection. During the detection process, the railway DRTD system dedicated detection equipment automatically eliminates invalid samples of DRTD system voice call and data transmission service status detection within the window period according to the cancellation and location update air interface command time window period. The specific detection data collection method will be introduced later.

[0038] 2. DRTD system detection and corresponding detection data collection plan.

[0039] 1. Business status detection and detection data collection plan.

[0040] (1) DRTD system voice call service status detection and corresponding service status detection data collection scheme.

[0041] Figure 2 A schematic diagram of voice call service status detection is provided; Figure 2 In the example, the Idmr interface is the control interface of the controller to control the test channel machine; the Ud interface is the wireless air interface between the test channel machine and the DRTD system; the Ifix interface is the interface between the DRTD system and the called end. The test interfaces are the Idmr and Ifix interfaces, and the test point is Ud. When the DRTD system voice call service status is detected, the controller controls the test channel machine to initiate the DRTD system voice call standard communication process.

[0042] (1.1) The controller controls the test channel machine to initiate a voice call and records the time T1 of initiating the call request air interface command. The called end automatically answers the voice call after receiving it. The called end here is the terminal device of the DRTD system.

[0043] (1.2) If the call is successfully established and there is no dropped call during the call holding process, the controller records the time T2 when the call success confirmation air interface command is received, records a call success sample, holds the call for a first set time (for example, set to 5 seconds), hangs up the call, and re-initiates the call after a second set time (for example, set to 30 seconds).

[0044] (1.3) If the call fails to be established or the call is dropped during the call holding process, a call failure sample is recorded, and the controller controls the test channel machine to initiate a new call after a second set time interval.

[0045] The following business status detection data is collected:

[0046] The timeliness of the voice call service status of the DRTD system (call establishment delay) = T2-T1;

[0047] The effectiveness of the voice call service status of the DRTD system (call establishment success rate) = [number of successful call samples / (number of successful call samples+number of failed call samples)]*100%.

[0048] Generally speaking, voice call services are divided into individual calls and group calls. Both call types can be tested and test data can be collected in the above manner.

[0049] (2) DRTD system data transmission service status detection and corresponding service status detection data collection scheme.

[0050] Figure 3 A schematic diagram of the connection structure between the controller, test channel machine and DRTD system is provided; when the DRTD system data transmission service status is detected, the test interface is the Idmr interface and the test point is Ud; the controller controls the test channel machine to initiate the DRTD system data transmission standard communication process.

[0051] (2.1) The DRTD system data transmission service status detection is achieved by sending and receiving data packets of a set length, and the data delay is tested by using a data loopback method;

[0052] (2.2) The controller controls the test channel machine to send a data packet. After receiving the data packet, the DRTD system loops back and forwards it to the test channel machine, and then forwards it to the controller through the test channel machine.

[0053] (2.3) At the Idmr interface, half of the time interval from the transmitted data packet (the first bit of the transmitted data packet) to the received loopback of the same data packet (the last bit of the received data packet) is used as the transmission delay of the data packet as the timeliness of the data transmission service status of the DRTD system; wherein, the Idmr interface is the control interface of the controller to control the test channel machine.

[0054] Data packets include: EMBC data packets and packet data packets, and the corresponding timeliness is counted respectively. Among them, the packet data packets are in the form of short packets and long packets. Short packets refer to packet data packets with shorter data packets, and long packets refer to packet data packets with longer data packets. The two are relative concepts.

[0055] For example: the length of the EMBC data packet is 8 bytes, and the lengths of the short packet and long packet of the packet data packet are 50 bytes and 600 bytes respectively.

[0056] (2.4) Synchronously record the number of packet losses and the total number of packets sent by the controller, and use the packet loss rate as the validity of the data transmission service status of the DRTD system.

[0057] The collected service status detection data include: the timeliness and effectiveness results of the DRTD system data transmission service status.

[0058] 2. DRTD system performance testing and test data collection plan.

[0059] In an embodiment of the present invention, the DRTD system performance detection includes: DRTD system wireless access performance detection and mobility performance detection, specifically: the controller controls the test channel machine to initiate the DRTD system wireless access standard communication process, captures the corresponding characteristic air interface command, performs the DRTD system wireless access performance detection, and collects the corresponding detection data; in the DRTD system voice call service status detection or data transmission service status detection, the controller captures the corresponding characteristic air interface command, performs the DRTD system mobility performance detection, and collects the corresponding detection data.

[0060] (1) DRTD system wireless access performance detection and detection data collection plan.

[0061] See also Figure 2 When testing the wireless access performance of the DRTD system, the test interface is the Idmr interface and the test point is Ud; the controller controls the test channel machine to initiate the standard communication process of the wireless access of the DRTD system.

[0062] (1.1) The controller controls any test channel machine to initiate wireless access and records the time T3 when the Idmr interface sends the locomotive number registration air interface command.

[0063] (1.2) If the wireless access is successful, the controller records the time T4 at which the locomotive number registration response air interface command is sent and received, records a wireless access success sample, logs out after the access is maintained for a first set time, and re-initiates the wireless access after a second set time;

[0064] (1.3) If the call fails to successfully access the wireless network, a wireless access failure sample is recorded, and the controller controls the test channel machine to initiate a new registration after a second set time interval;

[0065] (1.4) Collect the following test data:

[0066] The timeliness of wireless access of DRTD system (wireless access delay) = T4 - T3;

[0067] The effectiveness of wireless access of the DRTD system (wireless access success rate) = [number of successful wireless access samples / (number of successful wireless access samples+number of failed wireless access samples)]*100%.

[0068] (2) DRTD system mobility performance detection and detection data collection plan.

[0069] See also Figure 2 When testing the mobility performance of the DRTD system, the test interface is the Idmr interface and the test point is the Ud; and this test is carried out simultaneously with the service status test.

[0070] (2.1) During the voice call service status detection or data transmission service status detection of the DRTD system, the controller monitors the location update status of the test channel machine, records the time T5 of initiating the location update air interface command when the location update is initiated, and records the time T6 of receiving the location update response air interface command when the location update is successful;

[0071] (2.2) Collect the following test data:

[0072] The timeliness of DRTD system mobility performance = T6 - T5;

[0073] Location update first success rate (effectiveness) = (number of first update successes / total number of first update initiations) * 100%;

[0074] Total location update success rate (effectiveness) = (number of successful updates / total number of update initiations)*100%.

[0075] 3. Automatic elimination of test data.

[0076] During the service status detection process, the controller monitors the wireless access DRTD system status and location update status of the test channel machine, captures the wireless access and location update characteristic air interface commands, obtains the wireless access and location update communication process time periods, and automatically removes the DRTD system voice call and data transmission service status timeliness and effectiveness detection data samples within the statistical time period.

[0077] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. A special detection device for railway DRTD system, characterized in that: include: Controller and two test channel machines; among which: The controller is used to control the two test channel machines to respectively initiate DRTD system voice call service state detection and data transmission service state detection, collect corresponding service state detection data, and perform DRTD system performance detection by capturing characteristic air interface commands in the communication process with the DRTD system, and collect corresponding performance detection data; The two test channel machines are responsible for performing corresponding tests on the DRTD system under the control of the controller, and realize data transmission and reception between the controller and the DRTD system during the test process.

2. A railway DRTD system dedicated detection equipment according to claim 1, characterized in that: Also includes: Each test channel machine is equipped with a 400MHz frequency band antenna.

3. A railway DRTD system dedicated detection equipment according to claim 1, characterized in that: Also includes: A power supply unit is used to provide working power to the controller and two test channel machines.

4. A railway DRTD system dedicated detection equipment according to claim 1, characterized in that: Also includes: During the DRTD system detection process, the controller removes invalid samples of the DRTD system voice call and data transmission service status detection within the window period according to the deregistration and location update air interface command time window period.

5. A railway DRTD system dedicated detection equipment according to claim 1, characterized in that: Also includes: After the DRTD system dedicated detection equipment is turned on, it completes network access and authentication according to the standard communication process of the DRTD system and successfully registers the DRTD system to complete the test preparation and enter the standby state. After receiving the test instruction, the controller controls the two test channel machines to respectively initiate the DRTD system voice call service status detection and data transmission service status detection.

6. A railway DRTD system dedicated detection device according to any one of claims 1 to 5, characterized in that: The steps for detecting the voice call service status of the DRTD system and collecting the corresponding service status detection data are as follows: The controller controls the test channel machine to initiate a voice call and records the time T1 of initiating the call request air interface command. The called party automatically answers the voice call after receiving it. If the call is successfully established and there is no call drop during the call holding process, the controller records the time T2 when the call success confirmation air interface command is received, records a call success sample, holds the call for the first set time, hangs up the call, and re-initiates the call after the second set time interval; If the call fails to be established or the call is dropped during the call holding process, a call failure sample is recorded, and the controller controls the test channel machine to initiate a new call after the second set time interval; The following business status detection data is collected: The timeliness of the voice call service status of the DRTD system = T2 - T1; The effectiveness of the voice call service status of the DRTD system = [number of successful call samples / (number of successful call samples+number of failed call samples)]*100%.

7. A railway DRTD system dedicated detection device according to any one of claims 1 to 5, characterized in that: The steps for detecting the data transmission service status of the DRTD system and collecting the corresponding service status detection data are as follows: The DRTD system data transmission service status detection is achieved by sending and receiving data packets of a set length, and the data delay is tested by using a data loopback method; The controller controls the test channel machine to send data packets. After receiving the data packets, the DRTD system loops back and forwards them to the test channel machine, and then forwards them to the controller through the test channel machine. At the Idmr interface, half of the time interval between the sent data packet and the received loopback of the same data packet is used as the transmission delay of the data packet as the timeliness of the data transmission service status of the DRTD system; wherein the Idmr interface is the control interface of the controller to control the test channel machine; the data packets include: EMBC data packets and packet data packets, and the corresponding timeliness is counted respectively; Synchronously record the number of packet losses and the total number of packets sent by the controller, and use the packet loss rate as the validity of the data transmission service status of the DRTD system; The collected service status detection data include: the timeliness and effectiveness results of the DRTD system data transmission service status.

8. A railway DRTD system dedicated detection device according to claim 1, characterized in that: The DRTD system performance test is performed by capturing characteristic air interface commands in the communication process with the DRTD system, and the corresponding performance test data is collected, including: The controller controls any test channel machine to initiate the DRTD system wireless access standard communication process, capture the corresponding characteristic air interface commands, perform DRTD system wireless access performance detection, and collect corresponding detection data; In the voice call service state detection or data transmission service state detection of the DRTD system, the controller captures the corresponding characteristic air interface command, performs the DRTD system mobility performance detection, and collects the corresponding detection data.

9. A railway DRTD system dedicated detection device according to claim 1 or 8, characterized in that: The performing of DRTD system performance detection and collecting corresponding performance detection data includes: performing DRTD system wireless access performance detection and collecting corresponding detection data, the steps including: The controller controls the test channel machine to initiate wireless access and records the time T3 when the locomotive number registration air interface command is issued; If the wireless access is successful, the controller records the time T4 at which the locomotive number registration response air interface command is sent and received, records a wireless access success sample, logs out after the access is maintained for a first set time, and re-initiates the wireless access after a second set time interval; If the call fails to successfully access the wireless connection, a wireless access failure sample is recorded, and the controller controls the test channel machine to initiate a new registration after a second set time interval; Collect the following test data: The timeliness of wireless access of DRTD system = T4-T3; The effectiveness of wireless access of the DRTD system = [number of successful wireless access samples / (number of successful wireless access samples+number of failed wireless access samples)]*100%.

10. A railway DRTD system dedicated detection device according to claim 1 or 8, characterized in that: The performing of DRTD system performance detection and collecting corresponding performance detection data includes: performing DRTD system mobility performance detection and collecting corresponding detection data, the steps including: During the voice call service status detection or data transmission service status detection of the DRTD system, the controller monitors the location update status of the test channel machine, records the location update air interface command initiation time T5 when the location update is initiated, and records the location update response air interface command reception time T6 when the location update is successful; Collect the following test data: The timeliness of DRTD system mobility performance = T6 - T5; Location update first success rate = (number of first update successes / total number of first update initiations) * 100%; Total location update success rate = (number of successful updates / total number of update initiations)*100%.

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