Coal mine underground communication signal testing method based on 5G

Abstract

The invention discloses a 5G-based coal mine underground communication signal testing method, relates to the technical field of communication signal testing, and solves the problems that it is difficult to select a test item scene through a roadway trolley according to a control signal of a cloud server, and it is difficult to select a test item scene according to various comprehensive communication data and test item scenes. The technical problem of comprehensive communication signal testing is solved. Control and data processing are initiated through the cloud server, data processing function slicing processing is carried out, the 5G edge cloud server feeds back a data processing result to the 5G core cloud server, a test item scene is selected through the roadway trolley according to a control signal of the cloud server, test environment data are collected in real time, and the test item scene is rapidly fed back to the cloud server through the 5G base station. And the data processing efficiency is improved. The roadway trolley can collect test environment data according to a set test project scene, the reliability of the data is improved, and more image collection devices and roadway trolleys can be expanded conveniently.

Description

Technical Field

[0001] The present invention belongs to the field of communication signal testing, and specifically is a 5G-based coal mine underground communication signal testing method. Background Art

[0002] In recent years, due to the continuous growth of the number of smart devices in coal mines, the data exchange efficiency and line shortage problems have become increasingly prominent, which has led to widespread attention in the research and development of the field of underground Internet of Things in coal mines. 5G technology has the advantages of low latency (as low as 1ms), high reliability (up to 99.99%), large capacity, and communication quality assurance in complex non-line-of-sight environments. Therefore, more and more research institutions and scholars have turned their attention to 5G networking, but there is currently no test method for underground coal mine communication signals under 5G networks. Therefore, the testing and scientific evaluation of 5G network performance under the Internet of Things technology in coal mines is an important prerequisite for accelerating the application of 5G in the industrialization of the Internet of Things in coal mines.

[0003] Most of the existing underground communication signal testing solutions have single test items or test scenarios. It is difficult to select test project scenarios based on the control signals of the cloud server through the tunnel trolley, and it is also difficult to conduct comprehensive communication signal testing based on a variety of comprehensive communication data and test project scenarios. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a 5G-based coal mine underground communication signal testing method, which is used to solve the technical problems that it is difficult to select test project scenarios according to the control signal of the cloud server through a tunnel trolley, and it is also difficult to comprehensively conduct communication signal tests based on a variety of comprehensive communication data and test project scenarios.

[0005] To solve the above problems, the first aspect of the present invention provides a 5G-based coal mine underground communication signal testing method, comprising the following steps:

[0006] Deploy 5G base stations, test tunnels, and tunnel vehicles at the test location in the coal mine, with the 5G base station set up on one side of the test tunnel;

[0007] Data exchange between cloud servers and laneway vehicles is carried out through the 5G core network;

[0008] Initiate control and data processing through the cloud server, and perform data processing function slice processing, wherein the cloud server includes: a 5G edge cloud server and a 5G core cloud server, and the 5G edge cloud server feeds back the data processing results to the 5G core cloud server;

[0009] Relay and forward data between the cloud server and the laneway vehicle through the 5G base station;

[0010] The image acquisition equipment deployed in the test lanes obtains real-time video image data of the test scene, and transmits the data to the cloud server through the 5G base station;

[0011] The alley car receives control signals from the cloud server and selects the test project scenario based on the control signals, and controls the vehicle to run according to the set program. The alley car collects test environment data in real time, and feeds back the operation information and test data to the cloud server through the 5G base station.

[0012] As a further solution of the present invention: the 5G core cloud server performs data processing function slicing, including: access and mobility management slicing, session management slicing, and user plane management slicing;

[0013] The access and mobility management slice is responsible for the mobility and access management of the terminal;

[0014] The session management slice is responsible for session management;

[0015] The user plane management slice is responsible for the management of user plane functions.

[0016] As a further solution of the present invention: the 5G edge cloud server performs data processing function slicing, including Web slicing, PDN slicing, video surveillance slicing, data storage slicing, and data processing slicing;

[0017] Web slicing is responsible for information setting and query processing of the entire system;

[0018] PDN slicing is responsible for switching services and data distribution across the entire public network;

[0019] Data storage slices store data centrally and use disk arrays for data storage;

[0020] The data processing slice processes and analyzes the operation information and test data of the on-site tunnel trolley, and forwards the data processing results to the 5G core cloud server.

[0021] As a further solution of the present invention: the laneway vehicle comprises: a local application unit, a communication control unit, a middleware unit and a physical antenna unit;

[0022] The local application unit is used to select the test project scenario according to the test requirements of the test user; the communication control unit is used to control the data transmission between the local application unit and the middleware unit; the middleware unit is used to shield the differences in the physical underlying layer of communication and provide a unified interface for the communication control unit; the physical antenna unit is used for communication with the 5G base station and other alley vehicles.

[0023] As a further solution of the present invention: the lane trolley receives the cloud server control signal and selects the test project scenario according to the control signal, including the following steps:

[0024] Move the lane trolley loaded with the test equipment to the test lane, initialize the test equipment software, and wait for the test to start after confirming that the network connection is normal;

[0025] The cloud server sends control signals to the laneway trolley according to the test items, and the laneway trolley completes the test tasks of different test items according to the control signal instructions;

[0026] Among them, the test items include: vehicle-road communication test in 5G underground coal mine environment, vehicle-to-vehicle communication test in 5G underground coal mine environment and application function test in 5G underground coal mine environment.

[0027] As a further solution of the present invention: a vehicle-road communication test in a 5G coal mine underground environment includes the following steps:

[0028] The 5G edge cloud server continuously sends 32KB UDP data packets to the lane car for iperf packet filling test. The measured data files containing network throughput and packet loss rate are handed over to the data storage slice for processing and recording. The test is interrupted after four round trips.

[0029] Through the 5G edge cloud server, continuous ping requests are made to the lane car, 32-byte data is continuously sent and the measured delay data is handed over to the data processing slice for processing, and the results are sent to the data storage slice for storage and recording. The test is completed after 16 times.

[0030] As a further solution of the present invention: a vehicle-to-vehicle communication test in a 5G coal mine underground environment includes the following steps:

[0031] Through the 5G vehicle network, the lane cars communicate with each other, the i perf server and client are configured, and the vehicle-to-vehicle communication test scenarios are selected. The test scenarios include: the lane car front and rear follow-up scenario and the lane car meeting scenario;

[0032] Two laneway cars A and B equipped with test equipment travel at the speed and direction required by the selected vehicle-to-vehicle communication test scenario;

[0033] Among them, the vehicle-to-vehicle communication test scenarios include:

[0034] Lane Car A continuously sends 32KB UDP data packets to Lane Car B for i perf packet filling test, uploads the measured throughput and packet loss rate to the 5G edge cloud server and hands it over to the data processing slice to complete data processing. After turning back and forth 4 times, the test is interrupted.

[0035] Lane Car A makes continuous ping requests to Lane Car B, continuously sends 32-byte data and delivers the measured delay data to the data processing slice for processing, and sends the results to the data storage slice for storage and recording. The test is completed after 16 times;

[0036] As a further solution of the present invention: the application function test in the 5G coal mine underground environment includes the following steps:

[0037] Two laneway vehicles A and B equipped with test equipment, Laneway Vehicle A is used as the pilot vehicle, and Laneway Vehicle B is used as the rear convoy vehicle, driving according to the application scenario requirements;

[0038] Lane Car A requests navigation from the 5G edge cloud server based on the destination address entered by the test user;

[0039] During the driving process, lane car A continuously sends its own driving status information and control commands to lane car B. At the same time, lane car A and lane car B both send driving status information to the 5G edge cloud server in real time. After arriving at the destination, the data is delivered to the data processing slice for processing;

[0040] The driving status information includes: position information, speed and acceleration.

[0041] As a further solution of the present invention: data processing slices process and analyze the operation information and test data of the on-site laneway trolley, including the following steps:

[0042] For the test data of the 5G vehicle-road communication test in the underground coal mine environment, the average network throughput and packet loss rate data of each round trip during the i perf packet filling test were statistically analyzed;

[0043] Obtain the historical communication delay data between the 5G edge cloud server and the tunnel trolley when the communication environment is normal in the 5G underground coal mine environment, and calculate the mean of the historical communication delay data as the standard value of the underground trolley communication delay; obtain the historical network throughput data between the 5G edge cloud server and the tunnel trolley when the communication environment is normal in the 5G underground coal mine environment, and calculate the mean value as the standard value of the underground trolley communication network throughput, and calculate the maximum value as the maximum value of the underground trolley communication network throughput;

[0044] The vehicle-road communication quality coefficient is evaluated using the following formula:

[0045]

[0046] Among them, α is the vehicle-road communication quality coefficient, Tps i is the mean value of the network throughput of the ith return trip, Tpa is the standard value of the underground vehicle communication network throughput, and PLRi is the mean packet loss rate of the i-th round trip, Tpb is the maximum throughput of the underground vehicle communication network, Tps is the mean network throughput of the four round trips, D j is the delay data of the jth test, Da is the standard value of the underground vehicle communication delay, i∈(1,2,3,4), j∈(1,2,…,16);

[0047] For the test data of the vehicle-to-vehicle communication test in the 5G coal mine underground environment; the i perf packet filling test time is divided into several equal detection time intervals, and the mean of the network throughput and packet loss rate data in each detection time interval is detected;

[0048] Obtain the historical communication delay data between the tunnel vehicles when the communication environment is normal in the 5G coal mine underground environment, and calculate the mean of the historical communication delay data as the standard value of the communication delay between the underground tunnel vehicles; obtain the historical network throughput data between the underground tunnel vehicles when the communication environment is normal in the 5G coal mine underground environment, and calculate the mean value as the standard value of the underground vehicle communication network throughput, and calculate the maximum value as the maximum value of the underground vehicle communication network throughput;

[0049] The vehicle-road communication quality coefficient is evaluated using the following formula:

[0050]

[0051] Where β is the vehicle-road communication quality coefficient, Tp k is the mean value of the network throughput between lane vehicles in the kth detection time interval, Tpc is the standard value of the communication network throughput between lane vehicles, PL k is the mean value of the packet loss rate in the kth detection time interval, Tpd is the maximum value of the communication network throughput between lane vehicles, Tp is the mean value of the network throughput in the detection time interval corresponding to the jth test delay data, De j is the communication delay data between the laneway vehicles for the jth test, De is the standard value of the communication delay between the laneway vehicles in the mine, k∈(1,2,…,n);

[0052] For the test data of the application function test in the 5G coal mine underground environment, the difference between the driving status information of the laneway trolley A received by the laneway trolley B and the driving status information sent in real time by the laneway trolley A to the 5G edge cloud server is detected;

[0053] The communication quality coefficient of the application function is evaluated by the following formula:

[0054]

[0055] Wherein, γ is the communication quality coefficient of the application function, La is the distance between the location information of laneway car A received by laneway car B and the location information sent by laneway car A to the 5G edge cloud server in real time, La ll is the total length of the test lane where laneway car A and laneway car B are located, Lb is the distance between the location information sent by laneway car A and laneway car B to the 5G edge cloud server in real time, Va is the difference between the speed information of laneway car A received by laneway car B and the speed information sent by laneway car A to the 5G edge cloud server in real time, V is the speed information sent by laneway car A to the 5G edge cloud server in real time, a is the difference between the acceleration information of laneway car A received by laneway car B and the acceleration information sent by laneway car A to the 5G edge cloud server in real time, and a0 is the acceleration information sent by laneway car A to the 5G edge cloud server in real time;

[0056] The comprehensive communication quality is evaluated based on the vehicle-road communication quality coefficient, vehicle-road communication quality coefficient and application function communication quality coefficient.

[0057] As a further solution of the present invention: the comprehensive communication quality is evaluated according to the vehicle-road communication quality coefficient, the vehicle-road communication quality coefficient and the application function communication quality coefficient, by the following formula:

[0058]

[0059] Among them, K is the comprehensive communication quality evaluation value, α is the vehicle-road communication quality coefficient, β is the vehicle-road communication quality coefficient, and γ is the application function communication quality coefficient.

[0060] Compared with the prior art, the present invention has the following beneficial effects:

[0061] The present invention initiates control and data processing through a cloud server, and performs slicing processing of data processing functions, wherein the cloud server includes: a 5G edge cloud server and a 5G core cloud server, the 5G edge cloud server feeds back the data processing results to the 5G core cloud server, and the 5G edge cloud server is located at the edge of the network, and can process the data transmitted by the lane trolley nearby, reducing the distance and delay of data transmission to the core network. At the same time, edge computing can also reduce the load on the core network and improve the processing capacity of the entire network. By slicing the data processing function, the data processing process can be more flexibly configured and optimized, and the efficiency and accuracy of data processing can be improved. The deployment of 5G base stations and cloud servers and the slicing processing of data processing functions make the entire system more stable and reliable.

[0062] The present invention uses a tunnel trolley to select a test project scenario according to the control signal of the cloud server, collects test environment data in real time, and quickly feeds back to the cloud server through a 5G base station, thereby improving the efficiency of data processing. The tunnel trolley can accurately collect test environment data according to the set program, improves the accuracy and reliability of the data, provides strong support for the safe production and scientific management of coal mines, and facilitates the expansion of more image acquisition equipment and tunnel trolleys to meet the needs of larger-scale coal mine test scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0064] Figure 1 It is a schematic diagram of the system framework of the present invention;

[0065] Figure 2 This is a diagram of the laneway trolley data interaction function module of the present invention;

[0066] Figure 3 This is a flow chart of the lane communication performance test of the present invention;

[0067] Figure 4 This is a flow chart of the vehicle-to-vehicle communication performance test of the present invention. DETAILED DESCRIPTION

[0068] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than 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 scope of protection of the present invention.

[0069] See also Figure 1-Figure 4 The first aspect of the present invention provides a 5G-based coal mine underground communication signal testing method, comprising the following steps:

[0070] Deploy 5G base stations, test tunnels, and tunnel vehicles at the test location in the coal mine, with the 5G base station set up on one side of the test tunnel;

[0071] Data exchange between cloud servers and laneway vehicles is carried out through the 5G core network;

[0072] Initiate control and data processing through the cloud server, and perform data processing function slice processing, wherein the cloud server includes: a 5G edge cloud server and a 5G core cloud server, and the 5G edge cloud server feeds back the data processing results to the 5G core cloud server;

[0073] Relay and forward data between the cloud server and the laneway vehicle through the 5G base station;

[0074] The image acquisition equipment deployed in the test lanes obtains real-time video image data of the test scene, and transmits the data to the cloud server through the 5G base station;

[0075] The alley car receives control signals from the cloud server and selects the test project scenario based on the control signals, and controls the vehicle to run according to the set program. The alley car collects test environment data in real time, and feeds back the operation information and test data to the cloud server through the 5G base station.

[0076] Specifically, Figure 1 As shown, the 5G core network uses NFV and SDN to implement network element functions through software on general servers and realize data exchange between cloud servers and lane carts; the cloud server is used to start tasks, initiate control and function slicing, and realize slice data processing; the 5G base station is used for relay forwarding to assist the lane cart in communicating and positioning with the 5G core network; the test lane is set as the test site, and a camera is installed on the test lane to obtain real-time video images of the test scene; the lane cart is used to receive control and select the test scene according to the control signal to control the vehicle to run according to the set program and feed back the running information to the cloud server.

[0077] The 5G base station is based on multi-antenna large-scale input and output technology. In this embodiment, the 5G base station is equipped with 16 antennas to form multiple antenna arrays, and the array element spacing of the antenna array is half of the receiving wavelength.

[0078] 5G base stations, test tunnels and tunnel trolleys are deployed at the test location underground in the coal mine. The 5G base station is set on one side of the test tunnel. Data exchange between the cloud server and the tunnel trolley is carried out through the 5G core network. Control and data processing are initiated through the cloud server, and data processing function slice processing is performed. Among them, the cloud server includes: 5G edge cloud server and 5G core cloud server, and the 5G edge cloud server feeds back the data processing results to the 5G core cloud server. 5G technology has a large bandwidth and can support the rapid transmission of massive data underground in the coal mine. This ensures that the data exchange between the tunnel trolley and the cloud server can be carried out efficiently, reducing the delay and packet loss rate of data transmission. The low latency characteristics of 5G technology enable the tunnel trolley to respond to the control instructions of the cloud server in real time, thereby improving the response speed and operation efficiency of the entire system. 5G technology has higher security and can ensure the security of the data transmission process. At the same time, the cloud server adopts advanced data encryption and storage technology to ensure the security and integrity of the data. With the support of 5G technology and cloud servers, remote control and automatic operation of the tunnel trolley can be realized. This reduces the difficulty and risk of manual operations and improves the safety and efficiency of coal mine production.

[0079] 5G edge cloud servers are located at the edge of the network and can process data transmitted by laneway vehicles nearby, reducing the distance and latency of data transmission to the core network. At the same time, edge computing can also reduce the load on the core network and improve the processing capacity of the entire network. By slicing the data processing function, the data processing process can be more flexibly configured and optimized, and the efficiency and accuracy of data processing can be improved. The deployment of 5G base stations and cloud servers and the slicing of data processing functions make the entire system more stable and reliable.

[0080] Real-time video image data of the test scene is obtained through the image acquisition equipment deployed in the test lane, and the data is transmitted to the cloud server through the 5G base station; the lane car receives the cloud server control signal and selects the test project scene according to the control signal, and controls the vehicle to run according to the set program. The lane car collects the test environment data in real time, and feeds back the operation information and test data to the cloud server through the 5G base station.

[0081] The real-time video image data obtained by the image acquisition equipment is transmitted to the cloud server at high speed through the 5G base station, ensuring the real-time nature of the data, enabling monitoring and management personnel to quickly obtain underground conditions and respond in a timely manner.

[0082] The tunnel car selects the test project scenario according to the control signal of the cloud server, collects the test environment data in real time, and quickly feeds back to the cloud server through the 5G base station, which improves the efficiency of data processing. The tunnel car can accurately collect test environment data according to the set program, improves the accuracy and reliability of the data, provides strong support for the safe production and scientific management of coal mines, and facilitates the expansion of more image acquisition equipment and tunnel cars to meet the needs of larger-scale coal mine test scenarios.

[0083] In one embodiment of the present invention, the 5G core cloud server performs data processing function slicing, including: access and mobility management slicing, session management slicing, and user plane management slicing;

[0084] The access and mobility management slice is responsible for the mobility and access management of the terminal;

[0085] The session management slice is responsible for session management;

[0086] The user plane management slice is responsible for the management of user plane functions.

[0087] In one embodiment of the present invention, the 5G edge cloud server performs data processing function slicing, including Web slicing, PDN slicing, video surveillance slicing, data storage slicing, and data processing slicing;

[0088] Web slicing is responsible for information setting and query processing of the entire system;

[0089] PDN slicing is responsible for switching services and data distribution across the entire public network;

[0090] Data storage slices store data centrally and use disk arrays for data storage;

[0091] The data processing slice processes and analyzes the operation information and test data of the on-site tunnel trolley, and forwards the data processing results to the 5G core cloud server.

[0092] In one of the embodiments of the present invention, the laneway vehicle comprises: a local application unit, a communication control unit, a middleware unit and a physical antenna unit;

[0093] The local application unit is used to select the test project scenario according to the test requirements of the test user; the communication control unit is used to control the data transmission between the local application unit and the middleware unit; the middleware unit is used to shield the differences in the physical underlying layer of communication and provide a unified interface for the communication control unit; the physical antenna unit is used for communication with the 5G base station and other alley vehicles.

[0094] Specifically, Figure 2As shown, the communication control unit includes a communication control module and a data transmission module; the middleware unit includes a 5G RF driver module, a positioning driver module, a 5G RF module and a positioning module; and the physical antenna unit includes a 5G antenna.

[0095] In one embodiment of the present invention, the lane trolley receives a control signal from a cloud server and selects a test project scenario according to the control signal, including the following steps:

[0096] Move the lane trolley loaded with the test equipment to the test lane, initialize the test equipment software, and wait for the test to start after confirming that the network connection is normal;

[0097] The cloud server sends control signals to the laneway trolley according to the test items, and the laneway trolley completes the test tasks of different test items according to the control signal instructions;

[0098] Among them, the test items include: vehicle-road communication test in 5G underground coal mine environment, vehicle-to-vehicle communication test in 5G underground coal mine environment and application function test in 5G underground coal mine environment.

[0099] In one embodiment of the present invention, Figure 3 As shown in the figure, the vehicle-road communication test in the 5G coal mine underground environment includes the following steps:

[0100] The 5G edge cloud server continuously sends 32KB UDP data packets to the lane car for iperf packet filling test. The measured data files containing network throughput and packet loss rate are handed over to the data storage slice for processing and recording. The test is interrupted after four round trips.

[0101] Through the 5G edge cloud server, continuous ping requests are made to the lane car, 32-byte data is continuously sent and the measured delay data is handed over to the data processing slice for processing, and the results are sent to the data storage slice for storage and recording. The test is completed after 16 times.

[0102] In one embodiment of the present invention, Figure 4 As shown in the figure, the vehicle-to-vehicle communication test in the 5G coal mine underground environment includes the following steps:

[0103] Through the 5G vehicle network, the lane cars communicate with each other, the i perf server and client are configured, and the vehicle-to-vehicle communication test scenarios are selected. The test scenarios include: the lane car front and rear follow-up scenario and the lane car meeting scenario;

[0104] Two laneway cars A and B equipped with test equipment travel at the speed and direction required by the selected vehicle-to-vehicle communication test scenario;

[0105] Among them, the vehicle-to-vehicle communication test scenarios include:

[0106] Lane Car A continuously sends 32KB UDP data packets to Lane Car B for i perf packet filling test, uploads the measured throughput and packet loss rate to the 5G edge cloud server and hands it over to the data processing slice to complete data processing. After turning back and forth 4 times, the test is interrupted.

[0107] Lane Car A makes continuous ping requests to Lane Car B, continuously sends 32-byte data and delivers the measured delay data to the data processing slice for processing, and sends the results to the data storage slice for storage and recording. The test is completed after 16 times;

[0108] In one embodiment of the present invention, the application function test in the 5G underground coal mine environment includes the following steps:

[0109] Two laneway vehicles A and B equipped with test equipment, Laneway Vehicle A is used as the pilot vehicle, and Laneway Vehicle B is used as the rear convoy vehicle, driving according to the application scenario requirements;

[0110] Lane Car A requests navigation from the 5G edge cloud server based on the destination address entered by the test user;

[0111] During the driving process, lane car A continuously sends its own driving status information and control commands to lane car B. At the same time, lane car A and lane car B both send driving status information to the 5G edge cloud server in real time. After arriving at the destination, the data is delivered to the data processing slice for processing;

[0112] The driving status information includes: position information, speed and acceleration.

[0113] In one embodiment of the present invention, the data processing slice processes and analyzes the operation information and test data of the on-site laneway trolley, including the following steps:

[0114] For the test data of the 5G vehicle-road communication test in the underground coal mine environment, the average network throughput and packet loss rate data of each round trip during the i perf packet filling test were statistically analyzed;

[0115] Obtain the historical communication delay data between the 5G edge cloud server and the tunnel trolley when the communication environment is normal in the 5G underground coal mine environment, and calculate the mean of the historical communication delay data as the standard value of the underground trolley communication delay; obtain the historical network throughput data between the 5G edge cloud server and the tunnel trolley when the communication environment is normal in the 5G underground coal mine environment, and calculate the mean value as the standard value of the underground trolley communication network throughput, and calculate the maximum value as the maximum value of the underground trolley communication network throughput;

[0116] The vehicle-road communication quality coefficient is evaluated using the following formula:

[0117]

[0118] Among them, α is the vehicle-road communication quality coefficient, Tps i is the mean value of the network throughput of the ith return trip, Tpa is the standard value of the underground vehicle communication network throughput, and PLR i is the mean packet loss rate of the i-th round trip, Tpb is the maximum throughput of the underground vehicle communication network, Tps is the mean network throughput of the four round trips, D j is the delay data of the jth test, Da is the standard value of the underground vehicle communication delay, i∈(1,2,3,4), j∈(1,2,…,16);

[0119] For the test data of the vehicle-to-vehicle communication test in the 5G coal mine underground environment; the i perf packet filling test time is divided into several equal detection time intervals, and the mean of the network throughput and packet loss rate data in each detection time interval is detected;

[0120] Obtain the historical communication delay data between the tunnel vehicles when the communication environment is normal in the 5G coal mine underground environment, and calculate the mean of the historical communication delay data as the standard value of the communication delay between the underground tunnel vehicles; obtain the historical network throughput data between the underground tunnel vehicles when the communication environment is normal in the 5G coal mine underground environment, and calculate the mean value as the standard value of the underground vehicle communication network throughput, and calculate the maximum value as the maximum value of the underground vehicle communication network throughput;

[0121] The vehicle-road communication quality coefficient is evaluated using the following formula:

[0122]

[0123] Where β is the vehicle-road communication quality coefficient, Tp k is the mean value of the network throughput between lane vehicles in the kth detection time interval, Tpc is the standard value of the communication network throughput between lane vehicles, PL k is the mean value of the packet loss rate in the kth detection time interval, Tpd is the maximum value of the communication network throughput between lane vehicles, Tp is the mean value of the network throughput in the detection time interval corresponding to the jth test delay data, De j is the communication delay data between the laneway vehicles for the jth test, De is the standard value of the communication delay between the laneway vehicles in the mine, k∈(1,2,…,n);

[0124] For the test data of the application function test in the 5G coal mine underground environment, the difference between the driving status information of the laneway trolley A received by the laneway trolley B and the driving status information sent in real time by the laneway trolley A to the 5G edge cloud server is detected;

[0125] The communication quality coefficient of the application function is evaluated by the following formula:

[0126]

[0127] Wherein, γ is the communication quality coefficient of the application function, La is the distance between the location information of laneway car A received by laneway car B and the location information sent by laneway car A to the 5G edge cloud server in real time, La ll is the total length of the test lane where laneway car A and laneway car B are located, Lb is the distance between the location information sent by laneway car A and laneway car B to the 5G edge cloud server in real time, Va is the difference between the speed information of laneway car A received by laneway car B and the speed information sent by laneway car A to the 5G edge cloud server in real time, V is the speed information sent by laneway car A to the 5G edge cloud server in real time, a is the difference between the acceleration information of laneway car A received by laneway car B and the acceleration information sent by laneway car A to the 5G edge cloud server in real time, and a0 is the acceleration information sent by laneway car A to the 5G edge cloud server in real time;

[0128] The comprehensive communication quality is evaluated based on the vehicle-road communication quality coefficient, vehicle-road communication quality coefficient and application function communication quality coefficient.

[0129] Specifically, in the present embodiment, qualified thresholds are set for the vehicle-road communication quality coefficient, the vehicle-road communication quality coefficient and the application function communication quality coefficient. When the detected vehicle-road communication quality coefficient, the vehicle-road communication quality coefficient and the application function communication quality coefficient exceed the preset qualified thresholds, a communication quality alarm is issued. In the present embodiment, after a large number of statistics on the specific values ​​of the vehicle-road communication quality coefficient, the vehicle-road communication quality coefficient and the application function communication quality coefficient when the communication status is completely normal, the qualified thresholds of the vehicle-road communication quality coefficient, the vehicle-road communication quality coefficient and the application function communication quality coefficient can be set to 0.3, 0.3 and 0.5 respectively.

[0130] In one embodiment of the present invention, the comprehensive communication quality is evaluated according to the vehicle-road communication quality coefficient, the vehicle-road communication quality coefficient and the application function communication quality coefficient, and is performed by the following formula:

[0131]

[0132] Among them, K is the comprehensive communication quality evaluation value, α is the vehicle-road communication quality coefficient, β is the vehicle-road communication quality coefficient, and γ is the application function communication quality coefficient.

[0133] Specifically, in this embodiment, a threshold is set for the comprehensive communication quality evaluation value, and a communication quality alarm is issued when the detected comprehensive communication quality evaluation value exceeds the preset threshold. In this embodiment, after a large number of statistics are taken on the comprehensive communication quality evaluation values ​​when the communication status is completely normal, the average between the mean and the minimum value is taken as the threshold of the comprehensive communication quality evaluation value.

[0134] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A 5G-based coal mine underground communication signal testing method, characterized in that: The following steps are involved: Deploy 5G base stations, test tunnels, and tunnel vehicles at the test location in the coal mine, with the 5G base station set up on one side of the test tunnel; Data exchange between cloud servers and laneway vehicles is carried out through the 5G core network; Initiate control and data processing through the cloud server, and perform data processing function slice processing, wherein the cloud server includes: a 5G edge cloud server and a 5G core cloud server, and the 5G edge cloud server feeds back the data processing results to the 5G core cloud server; Relay and forward data between the cloud server and the laneway vehicle through the 5G base station; The image acquisition equipment deployed in the test lanes obtains real-time video image data of the test scene, and transmits the data to the cloud server through the 5G base station; The alley car receives control signals from the cloud server and selects the test project scenario based on the control signals, and controls the vehicle to run according to the set program. The alley car collects test environment data in real time, and feeds back the operation information and test data to the cloud server through the 5G base station.

2. A 5G-based coal mine underground communication signal testing method according to claim 1, characterized in that: The 5G core cloud server performs data processing function slicing, including access and mobility management slices, session management slices, and user plane management slices; The access and mobility management slice is responsible for the mobility and access management of the terminal; The session management slice is responsible for session management; The user plane management slice is responsible for the management of user plane functions.

3. A 5G-based coal mine underground communication signal testing method according to claim 1, characterized in that: 5G edge cloud servers perform data processing function slicing, including Web slicing, PDN slicing, video surveillance slicing, data storage slicing, and data processing slicing; Web slicing is responsible for information setting and query processing of the entire system; PDN slicing is responsible for switching services and data distribution across the entire public network; Data storage slices store data centrally and use disk arrays for data storage; The data processing slice processes and analyzes the operation information and test data of the on-site tunnel trolley, and forwards the data processing results to the 5G core cloud server.

4. A 5G-based coal mine underground communication signal testing method according to claim 1, characterized in that: The laneway car includes: a local application unit, a communication control unit, a middleware unit and a physical antenna unit; The local application unit is used to select the test project scenario according to the test requirements of the test user; the communication control unit is used to control the data transmission between the local application unit and the middleware unit; the middleware unit is used to shield the differences in the physical underlying layer of communication and provide a unified interface for the communication control unit; the physical antenna unit is used for communication with the 5G base station and other alley vehicles.

5. A 5G-based coal mine underground communication signal testing method according to claim 1, characterized in that: The lane trolley receives the control signal from the cloud server and selects the test project scenario according to the control signal, including the following steps: Move the lane trolley loaded with the test equipment to the test lane, initialize the test equipment software, and wait for the test to start after confirming that the network connection is normal; The cloud server sends control signals to the laneway trolley according to the test items, and the laneway trolley completes the test tasks of different test items according to the control signal instructions; Among them, the test items include: vehicle-road communication test in 5G underground coal mine environment, vehicle-to-vehicle communication test in 5G underground coal mine environment and application function test in 5G underground coal mine environment.

6. A 5G-based coal mine underground communication signal testing method according to claim 5, characterized in that: The 5G vehicle-road communication test in the underground coal mine environment includes the following steps: The 5G edge cloud server continuously sends 32KB UDP data packets to the lane car for iperf packet filling test. The measured data files containing network throughput and packet loss rate are handed over to the data storage slice for processing and recording. The test is interrupted after four round trips. Through the 5G edge cloud server, continuous ping requests are made to the lane car, 32-byte data is continuously sent and the measured delay data is handed over to the data processing slice for processing, and the results are sent to the data storage slice for storage and recording. The test is completed after 16 times.

7. A 5G-based coal mine underground communication signal testing method according to claim 5, characterized in that: The 5G vehicle-to-vehicle communication test in an underground coal mine environment includes the following steps: Through the 5G vehicle network, the lane vehicles communicate with each other, the iperf server and client are configured, and the vehicle-to-vehicle communication test scenarios are selected. The test scenarios include: the lane vehicle following the front and rear and the lane vehicle meeting scenario; Two laneway cars A and B equipped with test equipment travel at the speed and direction required by the selected vehicle-to-vehicle communication test scenario; Among them, the vehicle-to-vehicle communication test scenarios include: Lane Car A continuously sends 32KB UDP data packets to Lane Car B for iperf packet filling test, uploads the measured throughput and packet loss rate to the 5G edge cloud server and hands it over to the data processing slice to complete data processing. After turning back and forth 4 times, the test is interrupted; Lane Car A makes continuous ping requests to Lane Car B, continuously sends 32-byte data and delivers the measured delay data to the data processing slice for processing, and sends the results to the data storage slice for storage and recording. The test is completed after 16 times.

8. A 5G-based coal mine underground communication signal testing method according to claim 5, characterized in that: The application function test of 5G in the underground coal mine environment includes the following steps: Two laneway vehicles A and B equipped with test equipment, Laneway Vehicle A is used as the pilot vehicle, and Laneway Vehicle B is used as the rear convoy vehicle, driving according to the application scenario requirements; Lane Car A requests navigation from the 5G edge cloud server based on the destination address entered by the test user; During the driving process, lane car A continuously sends its own driving status information and control commands to lane car B. At the same time, lane car A and lane car B both send driving status information to the 5G edge cloud server in real time. After arriving at the destination, the data is delivered to the data processing slice for processing; The driving status information includes: position information, speed and acceleration.

9. A coal mine underground communication signal testing method based on 5G according to claim 1, characterized in that: Data processing slice processes and analyzes the operation information and test data of the on-site laneway trolley, including the following steps: For the test data of the 5G vehicle-road communication test in the underground coal mine environment, the average network throughput and packet loss rate data of each round trip during the iperf packet filling test were counted; Obtain the historical communication delay data between the 5G edge cloud server and the tunnel trolley when the communication environment is normal in the 5G underground coal mine environment, and calculate the mean of the historical communication delay data as the standard value of the underground trolley communication delay; obtain the historical network throughput data between the 5G edge cloud server and the tunnel trolley when the communication environment is normal in the 5G underground coal mine environment, and calculate the mean value as the standard value of the underground trolley communication network throughput, and calculate the maximum value as the maximum value of the underground trolley communication network throughput; The vehicle-road communication quality coefficient is evaluated using the following formula: Among them, α is the vehicle-road communication quality coefficient, Tps i is the mean value of the network throughput of the ith return trip, Tpa is the standard value of the underground vehicle communication network throughput, and PLR i is the mean packet loss rate of the i-th round trip, Tpb is the maximum throughput of the underground vehicle communication network, Tps is the mean network throughput of the four round trips, D j is the delay data of the jth test, Da is the standard value of the underground vehicle communication delay, i∈(1,2,3,4), j∈(1,2,…,16); For the test data of the vehicle-to-vehicle communication test in the 5G coal mine underground environment; the iperf packet filling test time is divided into several equal detection time intervals, and the mean of the network throughput and packet loss rate data in each detection time interval is detected; Obtain the historical communication delay data between the tunnel vehicles when the communication environment is normal in the 5G coal mine underground environment, and calculate the mean of the historical communication delay data as the standard value of the communication delay between the underground tunnel vehicles; obtain the historical network throughput data between the underground tunnel vehicles when the communication environment is normal in the 5G coal mine underground environment, and calculate the mean value as the standard value of the underground vehicle communication network throughput, and calculate the maximum value as the maximum value of the underground vehicle communication network throughput; The vehicle-road communication quality coefficient is evaluated using the following formula: Where β is the vehicle-road communication quality coefficient, Tp k is the mean value of the network throughput between lane vehicles in the kth detection time interval, Tpc is the standard value of the communication network throughput between lane vehicles, PL k is the mean value of the packet loss rate in the kth detection time interval, Tpd is the maximum value of the communication network throughput between lane vehicles, Tp is the mean value of the network throughput in the detection time interval corresponding to the jth test delay data, De j is the communication delay data between the laneway vehicles for the jth test, De is the standard value of the communication delay between the laneway vehicles in the mine, k∈(1,2,…,n); For the test data of the application function test in the 5G coal mine underground environment, the difference between the driving status information of the laneway trolley A received by the laneway trolley B and the driving status information sent in real time by the laneway trolley A to the 5G edge cloud server is detected; The communication quality coefficient of the application function is evaluated by the following formula: Wherein, γ is the communication quality coefficient of the application function, La is the distance between the location information of laneway car A received by laneway car B and the location information sent by laneway car A to the 5G edge cloud server in real time, Lall is the total length of the test lane where laneway car A and laneway car B are located, Lb is the distance between the location information sent by laneway car A and laneway car B to the 5G edge cloud server in real time, Va is the difference between the speed information of laneway car A received by laneway car B and the speed information sent by laneway car A to the 5G edge cloud server in real time, V is the speed information sent by laneway car A to the 5G edge cloud server in real time, a is the difference between the acceleration information of laneway car A received by laneway car B and the acceleration information sent by laneway car A to the 5G edge cloud server in real time, and a0 is the acceleration information sent by laneway car A to the 5G edge cloud server in real time; The comprehensive communication quality is evaluated based on the vehicle-road communication quality coefficient, vehicle-road communication quality coefficient and application function communication quality coefficient.

10. A 5G-based coal mine underground communication signal testing method according to claim 9, characterized in that: The comprehensive communication quality is evaluated based on the vehicle-road communication quality coefficient, vehicle-road communication quality coefficient and application function communication quality coefficient, using the following formula: Among them, K is the comprehensive communication quality evaluation value, α is the vehicle-road communication quality coefficient, β is the vehicle-road communication quality coefficient, and γ is the application function communication quality coefficient.

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