Method and system for testing service quality of subway wireless network

Abstract

The present invention provides a method and system for testing the service quality of subway wireless network, which is used for urban railway signal detection, and includes an on-board existing device, further includes m detection devices, a detection storage industrial computer, a control terminal, and a communication detection intranet switch, the communication detection intranet switch is used to communicate with the intranet of the detection device and provide communication services for the control terminal to control the operation of the detection device, the detection storage industrial computer is used to detect and temporarily store data communicated in the communication detection intranet switch, and the m detection devices are used for parallel detection of urban railway wireless communication signals, in which the on-board existing device is signal-connected to the detection device and the communication detection intranet switch. The present invention is particularly adapted to the application environment of subway, and has the function of accurately synchronizing time and GIS information without relying on GPS, and has a simple system operation, a high degree of automation, a flexible private network access manner, and centralized playback of multiple detection results.

Description

Technical Field

[0001] The present invention belongs to the field of wireless communication networks, and particularly relates to a method and a system for testing the service quality of a subway wireless network.

Background Art

[0002] In the field of wireless communication, a frequency sweeping device is an important test tool when telecommunications carriers / equipment vendors perform operations such as the construction of wireless base stations and network optimization. The frequency sweeping device is a frequency sweeping receiver that collects wireless air interface signals with high precision and high speed, can sweep and receive wireless signals, and sweep and output main parameters such as RSRP, SINR, RSRI, and RSRQ.

[0003] At the same time, the frequency sweeping device has a frequency spectrum analysis function, measures the signal power for a specified frequency band, displays the measurement results in the form of a two-dimensional frequency spectrogram, a three-dimensional frequency spectrogram, a sampling point signal intensity locus diagram, etc., and further has a function of playing back and exporting test data, and is equipped with a dedicated data analysis platform with strong data analysis capabilities.

[0004] However, when performing operation tests such as the construction of wireless base stations and network optimization using a frequency sweeping device on a train running at high speed, there are the following limitations.

[0005] 1. Does not support high-speed mobility: The detection device for urban railway vehicles is generally arranged at the leading vehicle of the railway vehicle, which is commonly known as the TC1 vehicle. Among the leading vehicles, the space relatively suitable for installing the detection device mainly consists of eight seat equipment cabinets under the seats. The three-dimensional space dimensions of the seat equipment cabinet are 480*280*220 (mm), and the space is limited. The external dimensions of the frequency sweeping device commonly seen in the market, especially the depth, are much larger than those of the seat cabinet. The frequency sweeping device cannot be attached to the seat cabinet by means of wall mounting or guide rails, and stable operation on a train running at high speed cannot be guaranteed.

[0006] 2. Does not support industrial-grade reliability: Different from ordinary network rooms or laboratories, the leading vehicle of the train is in a harsh environment such as high vibration, a lot of dust, extremely low temperature or extremely high temperature, belonging to the industrial-grade operating environment. The frequency sweeping device cannot adapt to long-term stable operation in this environment.

[0007] 3. Closed software platform: The frequency sweeping device is a dedicated hardware device, and data display is presented on the display screen of the terminal or on the PC through the data analysis platform. The frequency sweeping device can collect data on network service quality and electric field strength, but its data definition and data display logic are predefined by the device manufacturer. If an operator wants to change / customize according to the business scenario of the urban railway wireless network, it is difficult to obtain the support of the device manufacturer.

[0008] Therefore, for those skilled in the art, it is urgent to invent a brand-new method and system for testing the operation of the construction of wireless base stations and network optimization.

Summary of the Invention

[0009] In view of this, the object of the present invention is to provide a method and system for testing the service quality of the subway wireless network in order to solve the problems in the above-mentioned prior art.

[0010] To achieve the above technical object, the present invention discloses the following technical content: A system for testing the service quality of a subway wireless network, comprising an in-vehicle existing device, and further comprising m detection devices, a detection and storage industrial computer, a control terminal, and a communication detection intranet switch. The above communication detection intranet switch communicates with the intranet of the above detection device and is used to provide a communication service for the above control terminal to control the operation of the above detection device. The above detection and storage industrial computer is used to detect and temporarily store the data communicated within the above communication detection intranet switch. The m above detection devices are used to detect urban railway wireless communication signals in parallel. Among them, the above in-vehicle existing device is signal-connected to the above detection device and the above communication detection intranet switch.

[0011] Preferably, each of the above detection devices includes 1 to n wireless access modules. The above wireless access module is connected to the antenna of the above in-vehicle existing device based on the type of wireless communication included.

[0012] Preferably, the above detection device includes an electric field strength detection industrial computer and a service quality detection industrial computer. Both the above electric field strength detection industrial computer and the above service quality detection industrial computer are communicatively connected to the above communication detection intranet switch. The above electric field strength detection industrial computer cooperates with the above service quality detection industrial computer to perform a concurrent test.

[0013] Preferably, it further comprises a network server adapted to the service quality detection industrial computer. The network server is network-connected to the computer for service quality detection in the industry and is used to assist the test operation of the computer for service quality detection in the industry.

[0014] Preferably, the in-vehicle existing device includes an in-vehicle access unit TAU and a private network antenna. The in-vehicle access unit TAU is communicatively connected to the LTE-M wireless access module and the WLAN wireless access module in the detection device, and the private network antenna is communicatively connected to the radio frequency module in the detection device to realize indirect access to the subway wireless private network.

[0015] Preferably, the in-vehicle existing device includes a private network antenna. The private network antenna is communicatively connected to the radio frequency module, the LTE-M wireless access module, and the WLAN wireless access module in the detection device and is used for direct access to the subway wireless private network.

[0016] Preferably, the control terminal uses a time-space synchronization system to perform time-space synchronization control on the operation of the detection device. Among them, the time-space synchronization system is standard-equipped by the inspection vehicle, accesses the intranet of the inspection vehicle, and transmits information to each detection module regularly and uniformly by broadcast.

[0017] A method for testing the service quality of a subway wireless network, comprising: obtaining a detection requirement; generating activation parameters based on the detection requirement, and generating one or more detection subtasks according to the activation parameters; performing parallel detection by a plurality of the detection subtasks; executing the detection subtask and determining whether to receive an early termination command; If YES, temporarily store the detection record, complete the above detection subtask. If NO, temporarily store the detection record, set the detection duration of the above detection subtask according to the actual demand, detect whether the above detection subtask reaches the detection duration based on the above detection duration. If the detection result is NO, re-execute the detection subtask. If the detection result is YES, complete the above detection subtask. It includes completing a plurality of the above detection subtasks and updating the status of the detection items.

[0018] Preferably, the task types of the above detection subtasks include electric field strength detection and service quality detection.

[0019] Compared with the prior art, the present invention has the following beneficial effects: In the subway environment, it is normal that there is no GPS signal. This system has the function of accurately synchronizing time and GIS information without relying on GPS, centrally controls various types of test tasks, flexibly defines various combinations of tests, flexibly defines the start / end of test activation conditions, supports silent tests with unmanned operation, supports remote one-click tests, provides solutions for direct and indirect access to the subway wireless private network, simplifies the deployment difficulty, reduces the operation risk, realizes accurate synchronization of various service quality detection results and electric field strength detection results in time and space, plays them back on the same screen, compares them on the same screen, does not require switching between multi-systems, and can greatly simplify the process of troubleshooting interference sources / fault sources.

Brief Description of the Drawings

[0020] To more clearly explain the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art are briefly described below. Of course, the drawings described below are only embodiments of the present invention, and those skilled in the art can also obtain other drawings based on the provided drawings without creative efforts.

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Mode for Carrying Out the Invention

[0022] Hereinafter, the technical solution provided by the present invention will be described in detail in accordance with the embodiments, but it should not be understood as limiting the protection scope of the present invention.

Embodiment

[0023] A system for testing the service quality of a subway wireless network, comprising an in-vehicle existing device, and further comprising m detection devices, a detection and storage industrial computer, a control terminal, and a communication detection intranet switch. The communication detection intranet switch is used to communicate with the intranet of the detection device and provide a communication service for the control terminal to control the operation of the detection device. The detection and storage industrial computer is used to detect and temporarily store the data communicated in the communication detection intranet switch. The m detection devices are used to detect urban rail transit wireless communication signals in parallel. Among them, the in-vehicle existing device is signal-connected to the detection device and the communication detection intranet switch, which is characterized in that.

[0024] Specifically, In this embodiment, each of the detection devices includes 1 to n wireless access modules, and in this embodiment, m is 5 or less. The wireless access module is connected to the antenna of the in-vehicle existing device based on the type of wireless communication included.

[0025] To achieve a flexible private network access method, this embodiment provides solutions for direct and indirect access to the subway wireless private network, simplifies the deployment difficulty, reduces the operation risk, and (1) Indirect access to the subway wireless private network: The above-mentioned in-vehicle existing device includes an in-vehicle access unit TAU and a private network antenna. The above-mentioned in-vehicle access unit TAU is communicatively connected to the LTE-M wireless access module and the WLAN wireless access module in the above-mentioned detection device, and the above-mentioned private network antenna is communicatively connected to the radio frequency module in the above-mentioned detection device to achieve indirect access to the subway wireless private network. (2) Direct access to the subway wireless private network: The above-mentioned in-vehicle existing device includes a private network antenna. The above-mentioned private network antenna is communicatively connected to the radio frequency module, the LTE-M wireless access module, and the WLAN wireless access module in the above-mentioned detection device and is used for direct access to the subway wireless private network.

[0026] Furthermore, in this embodiment, the above-mentioned in-vehicle existing device includes a private network antenna, a train timing system, an in-vehicle access unit TAU, and a train position detection system PTI. Among them, both the above-mentioned train timing system and the above-mentioned train position detection system PTI are signal-connected to the above-mentioned communication detection intranet switch and receive the control of the above-mentioned control terminal.

[0027] In this embodiment, the above-mentioned detection device includes an electric field strength detection industrial computer and a service quality detection industrial computer. Both the above-mentioned electric field strength detection industrial computer and the above-mentioned service quality detection industrial computer are communicatively connected to the above-mentioned communication detection intranet switch. The above-mentioned electric field strength detection industrial computer cooperates with the above-mentioned service quality detection industrial computer to perform a concurrent test.

[0028] Furthermore, in this embodiment, the service quality detection types include LET-M, WLAN / WIFI, 5G, and EUHT. However, in actual applications, the service quality detection types are not limited to those disclosed in this embodiment.

[0029] In this embodiment, the electric field strength detection type is LET-M / WLAN. However, in actual applications, the electric field strength detection types are not limited to those disclosed in this embodiment.

[0030] Each service quality detection industrial computer or the above-mentioned electric field strength detection industrial computer includes 1 to n wireless access modules.

[0031] In this embodiment, it further includes a network server compatible with the service quality detection industrial computer. The above-mentioned network server is installed in the IDC computer room and is divided into a private network LET-M computer room, a WLAN computer room, and various civilian computer rooms according to different inspection items.

[0032] The above-mentioned network server is network-connected to the above-mentioned service quality detection industrial computer and is used to assist the test operation of the above-mentioned service quality detection industrial computer.

[0033] The control terminal uses a time-space synchronization system to perform time-space synchronization control on the operation of the detection device. Among them, the above-mentioned time-space synchronization system is standard-equipped by the inspection vehicle, accesses the intranet of the inspection vehicle, and transmits information to each detection module regularly and uniformly through broadcasting.

[0034] At the same time, in order to realize the centralized playback of various detection results, the various service quality detection results and electric field strength detection results in this embodiment achieve accurate synchronization in time and space, are played on the same screen, compared on the same screen, do not require switching of multiple systems, and can greatly simplify the process of troubleshooting interference sources / fault sources.

[0035] Furthermore, in this embodiment, the system hardware configuration parameters are as follows (all in-vehicle devices are corresponding industrial computers and switches that have passed the subway safety certification standard):

[0036] 1.1. In-vehicle industrial computer for detecting the electric field strength of the LTE-M private network: i7-6822EQ, 16G, 256G SSD * 2, RAID1, dual thousand MM12 network card, Nvidia A2000 MXM, 4G graphics card, HackRFOne. In this embodiment, the in-vehicle industrial computer for detecting the electric field strength of the LTE-M private network supports LTE-M dedicated communication network indicator data demodulation and cell decoding, supports collecting frequency spectrum data in a specified frequency band, supports scenarios without GPS, supports TDD uplink and downlink data separation collection, supports cleaning, merging, and compressed storage of frequency spectrum data, responds to the commands of the communication detection integrated control system, and executes corresponding detection operations according to the commands.

[0037] 1.2. In-vehicle industrial computer for detecting the electric field strength of the WLAN private network: i7-6822EQ, 16G, 256G SSD * 2, RAID1, dual thousand MM12 network card, Nvidia A2000 MXM, 4G graphics card, HackRFOne. In this embodiment, the in-vehicle industrial computer for detecting the electric field strength of the WLAN private network supports collecting frequency spectrum data in the specified frequency band of the WLAN dedicated communication network, supports collecting and analyzing WLAN switch log data, supports cleaning, merging, and compressed storage of frequency spectrum data, responds to the commands of the communication detection integrated control system, and executes corresponding detection operations according to the commands.

[0038] 1.3. In-vehicle industrial computer for LTE-M / WLAN / 5G / WIFI / EUHT service quality detection: i5-6422EQ, 8G, 256G SSD * 2, RAID1, dual thousand MM12 network cards, 2 * SIM, 2 PCI-E, 3 * USB LTE-M / 5G / WIFI / WLAN / EUHT modules. In this embodiment, the in-vehicle industrial computer for service quality detection supports five network modes such as LTE-M / WLAN / 5G / WIFI / EUHT to perform service quality detection simultaneously, supports service quality indicators such as connection success rate, connection delay, data transmission success rate, and data transmission delay, responds to the commands of the communication detection integrated control system, and executes corresponding detection operations according to the commands.

[0039] 1.4. In-vehicle industrial computer for temporary server: i5-6422EQ, 8G, 1T SSD * 4, RAID10, dual thousand MM12 network cards. In this embodiment, the in-vehicle industrial computer for temporary server supports local detection and debugging, detects the configuration, detects start / stop, detects record playback, detects temporary data storage, supports docking with the in-vehicle integrated data system, realizes the docking of the object model => (Suiteng OS cloud) interface, supports the analysis of time-space synchronization commands, detects data time-space marks, executes corresponding detection operations according to the commands, and meets the continuous communication detection data storage of 48 hours or 1000KM.

[0040] 1.5. In-vehicle intranet switch: M12 interface, full thousand M switch, 8 electrical ports (support 12 POE, support 4 bypass).

[0041] 1.6. LET-M private network QoS server: Installed in the dedicated computer room of the LTE-M private network, 1U server E-2124 / 16G * 2 / 2T SATA / 4-port gigabit / 400W.

[0042] 1.7. WLAN Private Network QoS Server: Installed in the dedicated computer room for the LTE-M private network, 1U server E-2124 / 16G*2 / 2T SATA / 4-port gigabit / 400W.

Example

[0043] A method for testing the service quality of the subway wireless network, comprising: Obtaining a detection requirement; Generating activation parameters based on the detection requirement, and generating one or more detection subtasks according to the activation parameters; Performing parallel detection on a plurality of the detection subtasks; Executing the detection subtask and determining whether to receive an early termination instruction; If YES, temporarily store the detection record, complete the detection subtask; if NO, temporarily store the detection record, set the detection duration of the detection subtask according to the actual requirement, detect whether the detection subtask reaches the detection duration based on the detection duration, if the detection result is NO, re-execute the detection subtask, if the detection result is YES, complete the detection subtask; Completing a plurality of the detection subtasks and updating the status of the detection item.

[0044] Specifically, the application scenario of this embodiment is a communication detection method in the active operation and maintenance method project of Guangzhou Metro Line 11.

[0045] The communication detection method adopts the split-type industrial computer of each method disclosed in the embodiment to detect the wireless communication signal of the line, and can realize the detection of the field strength of LTE-M / WLAN, the electromagnetic environment, and the service quality of WLAN / LTE-M / 5G / EUHT / WIFI.

[0046] Among them, the detection method hardware consists of a communication detection device and a communication detection method switch, which is multiplexed with the existing in-vehicle LTE-M / WLAN communication antenna. For tests such as civilian networks, the antenna of the test device itself is used.

[0047] After receiving the wireless signal via the antenna, the method processes, stores, displays the GIS graphically, and performs data statistics on the data.

[0048] The detection device, communication detection subsystem switch, and communication detection memory server are installed under the seat cabinet of the subway. The private network system antenna is shared with the vehicle, and the civilian network antenna is installed on the service quality detection device.

[0049] Installation instructions for in-vehicle detection devices: (1) Detection device The detection device refers to the LTE-M in-vehicle electric field strength detection industrial computer, WLAN in-vehicle electric field strength detection industrial computer, and service quality detection industrial computer (LTE-M / WLAN / 5G / EUHT / WIFI). The industrial computer is installed in the seat cabinet, with each unit corresponding to one seat cabinet, occupying approximately 2U of space. There are a total of 3 units, occupying a total of 6U of space. Specifically, in this embodiment, the detection device receives the detection task as the main device for executing the detection subtask, executes the detection task according to the detection configuration, saves the detection data, and updates the detection operation status in real time. And in this embodiment, the task types of the above detection subtasks include electric field strength detection and service quality detection.

[0050] (2) The industrial computer for temporary storage is also called the temporary storage server The occupied space is 2U, there is no model restriction, it is connected to the switch with Category 6 network cables, the remaining disk space per day is more than 1T, and the realization of the communication detection memory server is realized in the form of an industrial computer. Specifically, in this embodiment, the above-mentioned temporary storage industrial computer is used to receive operation instructions, generate detection tasks, allocate detection tasks, control the detection operation status, query detection data, configure detection parameters, export / backup detection data, and classify and store various types of data according to performance indicators and functional requirements, and provide the function of backing up historical data to the temporary server.

[0051] (3) Communication Detection Intranet Switch The occupied space is about 1.5U, the communication detection intranet switch is installed in the opposite seat cabinet, and is connected with M12 interface and Category 6 network cables. (4) LTE-M / WLAN Antenna Multiplex the existing roof antenna. Provide an N-type or SMA-type antenna interface to connect to the LTE-M / WLAN antenna on the train at the installation position of the detection device. (5) Train Timing and Position Detection Interface The subway side needs to provide an interface to adapt the detection system. (6) WLAN Detection Interface Requirement 1. Console: Used to display the switch logs in real time, it is necessary to reserve the in-vehicle WLAN switch Console logic interface, and the communication detection subsystem interface needs to be a (DB9) port or M12 interface. 2. Connect to the WLAN Ethernet port of the train and used for service quality testing. It is necessary to reserve the Ethernet port of the in-vehicle WLAN switch, and the interface of the communication detection subsystem needs to be an M12 interface. The above is only a preferred embodiment of the present invention. Still, those skilled in the art can make some improvements and modifications on the premise of not departing from the principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A system for testing the service quality of a subway wireless network, comprising an in-vehicle existing device, and further comprising m detection devices, a detection and storage industrial computer, a control terminal, and a communication detection intranet switch, The communication detection intranet switch communicates with the intranet of the detection device and is used to provide a communication service for the control terminal to control the operation of the detection device. The detection and storage industrial computer is used to detect and temporarily store the data communicated within the communication detection intranet switch. The m detection devices are used to detect urban rail transit wireless communication signals in parallel. Among them, the in-vehicle existing device is signal-connected to the communication detection intranet switch, and the detection device is signal-connected to the communication detection intranet switch. Each of the detection devices includes 1 to n wireless access modules. The wireless access module is connected to the antenna of the in-vehicle existing device based on the type of wireless communication included. The detection device includes an electric field strength detection industrial computer including a radio frequency module, and a service quality detection industrial computer including an LTE-M wireless access module and a WLAN wireless access module. Both the electric field strength detection industrial computer and the service quality detection industrial computer are communicatively connected to the communication detection intranet switch. The electric field strength detection industrial computer cooperates with the service quality detection industrial computer to perform a concurrent test. The in-vehicle existing device includes an in-vehicle access unit TAU and a private network antenna. When indirectly accessing the subway wireless private network, The in-vehicle access unit TAU is communicatively connected to the LTE-M wireless access module and the WLAN wireless access module. The private network antenna is communicatively connected to the radio frequency module. When directly accessing the subway wireless private network, The private network antenna is communicatively connected to the radio frequency module, the LTE-M wireless access module, and the WLAN wireless access module. The control terminal uses a time-space synchronization system to perform time-space synchronization control on the operation of the detection device. Among them, the time-space synchronization system is standard-equipped by an inspection vehicle, accesses the intranet of the inspection vehicle, and transmits information to each detection module regularly and uniformly by broadcasting. A system for testing the service quality of a subway wireless network is characterized by this.

2. Further comprising a network server adapted to a service quality detection industrial computer, The network server is network-connected to the service quality detection industrial computer, A system for testing the service quality of a subway wireless network according to claim 1, characterized in that it is used to assist the test operation of the service quality detection industrial computer.

Images