Rail transit network communication method, device and equipment based on dual-high mode

Abstract

The invention provides a rail transit network communication method, device and equipment based on a double-high mode. The method specifically comprises the following steps: acquiring network state data in a rail transit network in real time; inputting the network state data into a pre-constructed rail transit network model in a double-high mode; the rail transit network model extracts the type of the network state data, generates a corresponding thread and then enters a corresponding sub-model to be matched, and if abnormity exists, alarm information is sent out; according to the method, the rail transit network model based on the double-high mode is constructed to monitor and analyze the real-time data so as to effectively improve the communication efficiency of the wireless communication network, then the rail transit network model is divided and designed into a plurality of sub-models so as to analyze and process based on different types of data, and the communication efficiency of the wireless communication network is improved. And the safety and the operation efficiency of the train are obviously improved.

Description

Technical Field

[0001] The present invention relates to the field of rail transit technology, and in particular to a rail transit network communication method, device and equipment based on a dual-high mode. Background Art

[0002] The current status of subway wireless network coverage is an evolving process, which is affected by many factors such as technology, funding, and policy. In recent years, with the continuous upgrading of network technology and the increasing demand for wireless communications, subway wireless network coverage has been significantly improved.

[0003] With the rapid development of urban rail transit, traditional 2G / 3G / 4G networks can no longer meet the needs of urban subways for high capacity and high transmission speed. With the continuous development and application of new generation communication technologies such as 5G, subway wireless network construction is also actively introducing new technologies. The introduction of 5G networks has become an effective solution to improve the coverage of wireless networks.

[0004] With the construction of high-speed subways, the subway car bodies and speeds have posed challenges to the original subway wireless network coverage solutions. As a result, during the operation of high-speed subways, wireless signals may be subject to a certain degree of interference and attenuation, resulting in unstable signals; due to untimely switching, users may experience network disconnection and other problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention proposes a rail transit network communication method, device and equipment based on the dual-high mode to solve the problems such as network disconnection caused by untimely switching in the prior art. The technical solution of the present invention can significantly improve the safety and operation efficiency of the train, and also provide passengers with a safer and more comfortable travel environment.

[0006] In a first aspect, the present invention proposes a rail transit network communication method based on a dual-high mode, the method comprising the following steps:

[0007] Obtain network status data in rail transit network in real time;

[0008] Inputting the network status data into a pre-built dual-high mode rail transit network model;

[0009] The rail transit network model extracts the type of the network status data and generates a corresponding thread, then enters the corresponding sub-model for matching, and issues an alarm message if an abnormality exists;

[0010] Among them, the rail transit network model is composed of a wireless network distribution sub-model in the station, a tunnel wireless distribution sub-model, a tunnel power supply sub-model, a tunnel transmission network sub-model, a computer room supporting sub-model and a multi-scene switching sub-model, and the type of the network status data is based on one or more data generated in the wireless network distribution sub-model, the tunnel wireless distribution sub-model, the tunnel power supply sub-model, the tunnel transmission network sub-model, the computer room supporting sub-model and the multi-scene switching sub-model.

[0011] Furthermore, the wireless network distribution sub-model in the station consists of a three-layer structure based on BBU, Hub and RF Uint, wherein the BBU layer divides the active room into an extended pico base station based on 86CPU architecture and a distributed pico base station based on ASIC architecture, and the RF Unit layer divides the active room into 5G single-mode equipment and 2G / 4G / 5G multi-mode equipment.

[0012] Furthermore, the tunnel wireless distribution sub-model adopts tunnel leaky cables and 5 / 4 leaky cables to support the 5G frequency band, wherein the leaky cables are installed on one side of the tunnel wall, the hanging height of the leaky cables must be within the height range of subway train windows, the height range of the train windows is 2.0-2.9m above the rail plane, and the spacing between the leaky cables is not less than 4 times the wavelength.

[0013] Furthermore, the tunnel power supply sub-model is powered by a 380V three-phase power supply and is connected to the tunnel breakpoint AC distribution box after introducing the 380V three-phase power supply through the subway machine room, wherein the breakpoint draws power from the subway machine room, an AC distribution box is installed at each breakpoint, and the power cables are selected according to the maximum allowable voltage drop principle.

[0014] Furthermore, the maximum allowable pressure drop is 10%.

[0015] Furthermore, the tunnel transmission network sub-model includes a work shaft located outside the entry station for wireless network access, BBU to breakpoint based on the machine room to breakpoint to RRU extension and tunnel machine room ring, wherein two entry stations are selected for a subway line, and the tunnel machine room ring is used to form a ring between the entry stations.

[0016] Furthermore, the computer room supporting sub-model includes an AC distribution box, a DC power supply system, a battery backup system, a grounding system and an air-conditioning system for powering the computer room, wherein the capacity of the AC distribution box is 380V / 150A, and the horizontal wiring rack in the computer room is installed with a floor-standing vertical wiring rack as a support, and the distance between the two supports is not more than 2 meters.

[0017] Furthermore, the multi-scenario switching sub-model includes tunnel entrance scenes and station entrance and exit scenes. In the tunnel entrance scene, a mode of adding a directional antenna to the end of a leaky cable is adopted, and an outdoor directional antenna is used at the intersection of each tunnel and the ground to radiate the signal in the tunnel to the outdoors along the direction of the tunnel; the station entrance and exit scene includes a first signal switching for users entering and exiting the subway station and a second signal switching between the station hall and the platform. In the first signal switching, an omnidirectional ceiling antenna is installed on the top of the middle position of the escalator, and in the second signal switching, an omnidirectional antenna is placed at the upper and lower ends of the escalator.

[0018] In a second aspect, the present invention further proposes a device based on the rail transit network communication method according to the first aspect, the device comprising:

[0019] An acquisition module is used to acquire network status data in the rail transit network in real time;

[0020] An input module, used for inputting the network status data into a pre-built rail transit network model of a dual-high mode;

[0021] A processing module, which is used for the rail transit network model to extract the type of the network status data and generate a corresponding thread, and then enter the corresponding sub-model for matching. If there is an abnormality, an alarm message is issued;

[0022] Among them, the rail transit network model is composed of a wireless network distribution sub-model in the station, a tunnel wireless distribution sub-model, a tunnel power supply sub-model, a tunnel transmission network sub-model, a computer room supporting sub-model and a multi-scene switching sub-model, and the type of the network status data is based on one or more data generated in the wireless network distribution sub-model, the tunnel wireless distribution sub-model, the tunnel power supply sub-model, the tunnel transmission network sub-model, the computer room supporting sub-model and the multi-scene switching sub-model.

[0023] In a third aspect, the present invention proposes an electronic device, comprising a processor and a memory storing a computer program, wherein the processor implements the steps of the rail transit network communication method as described in the first aspect when executing the computer program.

[0024] The present invention proposes a rail transit network communication method, device and equipment based on a dual-high mode, specifically including: real-time acquisition of network status data in a rail transit network; inputting the network status data into a pre-constructed dual-high mode rail transit network model; the rail transit network model extracts the type of the network status data and generates a corresponding thread and then enters the corresponding sub-model for matching, and if there is an abnormality, an alarm message is issued; wherein the rail transit network model is composed of a wireless network distribution sub-model in a station, a tunnel wireless distribution sub-model, a tunnel power supply sub-model, a tunnel transmission network sub-model, a machine room supporting sub-model and a multi-scene switching sub-model, and the type of the network status data is based on one or more data generated in the wireless network distribution sub-model, the tunnel wireless distribution sub-model, the tunnel power supply sub-model, the tunnel transmission network sub-model, the machine room supporting sub-model and the multi-scene switching sub-model. The present invention effectively improves the communication efficiency of the wireless communication network by constructing a rail transit network model based on a dual-high mode for real-time data monitoring and analysis, and secondly, by dividing and designing the rail transit network model into multiple sub-models, analysis and processing are performed based on different types of data, significantly improving the safety and operation efficiency of the train. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a flow chart of the rail transit network communication method based on the dual-high mode proposed by the present invention;

[0026] Figure 2 Framework diagram of the rail transit network communication device based on the dual-high mode proposed by the present invention;

[0027] Figure 3 Schematic diagram of an electronic device. DETAILED DESCRIPTION

[0028] For ease of understanding, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying 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 scope of protection of the present invention.

[0029] The terms used herein are only used for the purpose of describing specific example embodiments and are not restrictive. For example, unless the context clearly indicates otherwise, as used herein, the singular forms "a", "an" and "the" may also include plural forms. When used in this specification, the terms "include", "comprise" and / or "contain" mean that the associated integers, steps, operations, elements and / or components exist, but do not exclude the existence of one or more other features, integers, steps, operations, elements, components and / or groups or that other features, integers, steps, operations, elements, components and / or groups may be added in the system / method.

[0030] In view of the following description, these and other features of the present specification, as well as the operation and function of the related elements of the structure, and the economy of the combination and manufacture of the parts can be significantly improved. Reference is made to the accompanying drawings, all of which form a part of this specification. However, it should be clearly understood that the drawings are for illustration and description purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not drawn to scale.

[0031] The flowcharts used in this specification illustrate the operations implemented by the system according to some embodiments in this specification. It should be clearly understood that the operations of the flowcharts may not be implemented in sequence. On the contrary, the operations may be implemented in reverse order or simultaneously. In addition, one or more other operations may be added to the flowchart. One or more operations may be removed from the flowchart.

[0032] Figure 1 A flow chart of a rail transit network communication method based on a dual-high mode is shown, Figure 1 As shown, the present invention proposes a rail transit network communication method based on a dual-high mode, the method comprising the following steps:

[0033] Step S101. Acquire network status data in the rail transit network in real time;

[0034] Step S102: inputting the network status data into a pre-built dual-high mode rail transit network model;

[0035] Step S103. The rail transit network model extracts the type of the network status data and generates a corresponding thread, and then enters the corresponding sub-model for matching. If there is an abnormality, an alarm message is issued;

[0036] Among them, the rail transit network model is composed of a wireless network distribution sub-model in the station, a tunnel wireless distribution sub-model, a tunnel power supply sub-model, a tunnel transmission network sub-model, a computer room supporting sub-model and a multi-scene switching sub-model, and the type of the network status data is based on one or more data generated in the wireless network distribution sub-model, the tunnel wireless distribution sub-model, the tunnel power supply sub-model, the tunnel transmission network sub-model, the computer room supporting sub-model and the multi-scene switching sub-model.

[0037] In this embodiment, a rail connection network communication method based on the dual-high mode is proposed. The high-speed subway with a speed of 160 kilometers per hour has significantly improved the operating speed of urban rail transit and greatly shortened the travel time of passengers. The realization of this high speed depends on advanced train design, efficient traction system and optimized line planning. High-speed and ordinary subway trains are quite different, and the overall appearance is similar to that of high-speed subway trains. In order to meet the needs of users to enjoy broadband wireless communication services such as voice, video, and games during high-speed subway journeys, a rail transit network communication solution based on the "dual-high" (high-speed data service in the mobile environment of high-speed subway) mode is proposed.

[0038] In this embodiment, a rail transit network model based on the dual-high mode is pre-constructed. The model is composed of multiple sub-models. By constructing these sub-models, the rail transit network model can more completely and specifically reflect the overall network status of the wireless communication network in the rail transit. After the complete model is constructed, the rail transit network can monitor these network status data in real time to determine whether there are problems in the network and find the specific source of the problem, thereby effectively improving the network quality and network operation efficiency.

[0039] According to the above content, the rail transit network model is divided into multiple sub-models, including a wireless network distribution sub-model in the station, a tunnel wireless distribution sub-model, a tunnel power supply sub-model, a tunnel transmission network sub-model, a machine room supporting sub-model and a multi-scenario switching sub-model. By monitoring the real-time data in these sub-models, when any network status data is obtained, it is entered into the model for matching to determine whether there is an abnormality. If there is an abnormality, an alarm is issued. It should be noted that the construction data of these models are all standard data, that is, these data are set within the range of normal operation. When the real-time collected data deviates after matching in the model, it means that an abnormality has occurred. Different from the prior art, this embodiment specifically gives the specific composition process of multiple sub-models, which is described in detail below.

[0040] High-speed subways are scenarios with ultra-dense passenger flow and high demand for voice and data services, so subway stations are generally covered by new digital indoor coverage that supports 5G. In this embodiment, the wireless network distribution sub-model in the station consists of a three-layer structure based on BBU, Hub, and RF Uint. The BBU layer divides the active room into an extended pico base station based on the 86CPU architecture and a distributed pico base station based on the ASIC architecture, and the RF Unit layer divides the active room into 5G single-mode devices and 2G / 4G / 5G multi-mode devices. The advantage of the active indoor coverage solution is that it has elastic expansion capabilities, which can meet the needs of indoor coverage scenarios with large network capacity requirements or obvious tidal effects in subway stations, and has the ability to conduct refined passenger flow analysis.

[0041] It should be noted that based on the wireless network distribution sub-model within the station, the front-end room needs to be selected to place the Rhub because the subway communication room is far away from the terminal. At the same time, due to the different access networks of different users in practice, it is necessary to reasonably layout and reserve the wiring routes and pipeline troughs in advance.

[0042] The tunnel wireless distribution sub-model of this embodiment adopts tunnel leaky cable and 5 / 4 leaky cable to support 5G frequency band, wherein the leaky cable is installed on one side of the tunnel wall, and the hanging height of the leaky cable should be within the height range of subway train windows, and the height range of the train windows is 2.0-2.9m from the rail plane. The spacing requirement of the leaky cables, according to the MIMO networking requirements, requires a spacing of not less than 4 times the wavelength. If four-cable networking is adopted, the spacing shall not be less than 0.3m.

[0043] It should be noted that the evolution process of the 5G network in the high-speed subway tunnel distribution system can be concluded as follows:

[0044] (1) 13 / 8” leaky cable cannot support 5G frequency band coverage.

[0045] (2) 800M~3.6G full-band leaky cable, there is a risk of 5G frequency band interfering with the existing 3 / 4G frequency band, especially the mobile 2.6G frequency band.

[0046] (3) If high-frequency optimized cables are used, 2 / 3 / 4G networking is required, and 5G networking is done separately, requiring additional installation (4 cables). The advantage is that the performance will be better and the risk of interference will be lower.

[0047] In practice, the construction of the tunnel wireless distribution sub-model needs to consider the specific construction cost. When making link budget, the calculation is based on the 30W power of the 5G main equipment, the pilot power of 9.68dBm, the 5G coverage indicator edge field strength is -105dBm, the train speed is 160 kilometers per hour, and the latest 5 / 4 high-frequency leaky cable electrical performance indicators are used. The tunnel is covered with leaky cable, which is installed on one side of the tunnel wall.

[0048] The tunnel power supply sub-model of this embodiment is powered by a 380V three-phase power supply and is connected to the tunnel breakpoint AC distribution box after introducing the 380V three-phase power supply through the subway machine room, wherein the breakpoint draws power from the subway machine room, and an AC distribution box is installed at each breakpoint. The power cables are selected according to the maximum allowable voltage drop principle, and the maximum allowable voltage drop is 10%.

[0049] The tunnel transmission network sub-model of this embodiment includes a work shaft located outside the entry station and providing wireless network access, BBU to breakpoint based on the machine room to breakpoint extension to the RRU at the breakpoint, and tunnel machine room ring formation, wherein two entry stations are selected for a subway line, and the tunnel machine room ring formation is used to form a ring between the entry stations.

[0050] The computer room supporting sub-model of this embodiment includes the AC distribution box, DC power supply system, battery backup system, grounding system and air conditioning system for the computer room power supply, wherein the capacity of the AC distribution box is 380V / 150A, and the horizontal wiring rack in the computer room is installed with a floor-standing vertical wiring rack as a support, and the distance between the two supports is not more than 2 meters. Specifically, it includes the following contents:

[0051] (1) Each machine room is provided with two AC mains supplies from the subway company to the public network distribution box, and the capacity of the AC distribution box is 380V / 150A.

[0052] (2) DC power supply system: each computer room is equipped with a switching power supply to supply power to the equipment of each operator.

[0053] (3) The battery backup system is designed to provide half-hour power supply.

[0054] (4) Grounding system: Two ground bars are newly built in each equipment room and connected to the main ground bar of the subway company with 95mm2 cables. The operator's equipment is grounded to the newly built ground bar.

[0055] (5) The air conditioning system is provided by the subway with central air conditioning.

[0056] (6) The new AC should be as close as possible to the existing subway AC;

[0057] (7) The position of the feeder window should be determined based on the equipment arrangement and the relative position of the tower and the machine room to minimize the length, turns and twists of the feeder in the room.

[0058] (8) Equipment cannot be placed under the existing exhaust vents of the subway;

[0059] (9) The POI should be as close to the feed hole as possible to reduce signal attenuation and ensure signal strength;

[0060] (10) The DC should be placed between the three operators as much as possible;

[0061] (11) The battery is usually installed against the wall;

[0062] (12) The horizontal wiring rack in the subway communication room needs to be installed with a floor-standing vertical wiring rack as support. Generally, the distance between the two supports should not exceed 2 meters;

[0063] (13) If conditions permit, AC cables and DC cables should be routed separately;

[0064] (14) It is necessary to pay attention to whether there is enough maintenance space between equipment, including the channel space required to move equipment for later expansion;

[0065] (15) Non-flammable cables should be used for wiring in the machine room.

[0066] The multi-scenario switching sub-model of this embodiment includes a tunnel entrance scene and a station entrance and exit scene. In the tunnel entrance scene, a mode of adding a directional antenna to the end of a leaky cable is adopted, and an outdoor directional antenna is used at the intersection of each tunnel and the ground to radiate the signal in the tunnel to the outdoors along the direction of the tunnel.

[0067] It should be noted that the special structure of the subway tunnel entrance, which is narrow, long and closed, makes it difficult for the outdoor signal to extend into the tunnel. Since the tunnel entrance is generally located in the middle of two subway stations, where the train runs at high speed, when the train enters the tunnel entrance at high speed, the signal level of the outdoor service cell drops sharply in a very short time, so that the mobile station does not have enough time to complete the entire switching process, resulting in dropped calls. According to the location structure of the subway tunnel entrance and the characteristics of the surrounding electromagnetic environment, there are multiple solutions to solve the problem of sudden disappearance of the tunnel entrance signal. Specific analysis and comparison are conducted for each solution.

[0068] In the tunnel entrance scenario, three technical solutions can be used: adding a directional antenna to the end of the leaky cable, introducing the outdoor signal into the tunnel, and extending the leaky coaxial cable out of the tunnel entrance. In Solution 1, in order to ensure the successful switching time of the system, an outdoor directional antenna is used at the intersection of each tunnel and the ground to radiate the signal in the tunnel along the tunnel direction to the outdoors, so that when the underground tunnel extends to the ground, the indoor signal strength and the outdoor signal strength maintain a smooth transition state. When the train leaves the ground, the indoor signal gradually weakens, and the outdoor signal gradually strengthens. There is no sudden disappearance of the signal, which avoids the mobile station from dropping calls due to insufficient switching time. In Solution 2, when the outdoor signal environment is relatively good, the outdoor signal can be amplified by using a radio frequency repeater or a BBU-RRU signal source and then introduced into the tunnel, so that the indoor signal strength and the outdoor signal strength in the area near the tunnel entrance of the underground tunnel maintain a smooth transition state. When the train approaches the tunnel entrance, the indoor signal gradually weakens, and the outdoor signal gradually strengthens. There is no sudden disappearance of the signal, which avoids the mobile station from dropping calls due to insufficient switching time. In the third scheme, the characteristic of leaky coaxial cable feeding RF signal is utilized, and the leaky cable is extended out of the tunnel entrance and laid along the ground track for a certain distance, so that the indoor signal field strength and the outdoor signal field strength maintain a smooth transition state when the underground tunnel extends to the ground. When the train leaves the ground, the indoor signal gradually weakens, and the outdoor signal gradually strengthens. There is no sudden disappearance of the signal, which avoids the mobile station from dropping calls due to insufficient switching time. Among the three schemes, the first scheme has a small investment and is easy to implement, the second has a large investment, and the third scheme is more difficult to construct. Therefore, the first scheme is adopted.

[0069] In the station entrance and exit scenario, when mobile users take the escalator to enter and exit the subway station, the mobile phone signal strength drops sharply due to Rayleigh fading caused by the movement of the escalator and signal fading caused by crowds, resulting in insufficient signal overlap area (switching area), which can easily cause user calls to be interrupted and dropped calls to occur. As long as the 2G signal level is above -85dBm 6 meters after the pedestrian exits the subway station, it can ensure that the passenger switches smoothly when passing through the subway exit. Therefore, it is only necessary to set up antennas at the station entrance and exit to ensure that the 2G signal level at the entrance and exit is above -85dBm, thereby ensuring the stability of wireless signal coverage for pedestrians entering and exiting the subway station.

[0070] If a section needs to be set up with two cell switching zones, the platform and station hall need to be set up as the switching zone between the up and down escalators between the platform and the station hall. Signal switching mainly occurs in the following locations: the switching of passengers entering and exiting the subway station; the switching between the station hall and the platform. Therefore, the station entrance and exit scene includes the first signal switching of users entering and exiting the subway station and the second signal switching between the station hall and the platform. In the first signal switching, an omnidirectional ceiling antenna is installed on the top of the middle position of the escalator, and in the second signal switching, an omnidirectional antenna is deployed at the upper and lower positions of the escalator.

[0071] A rail transit network communication model is generated by constructing the above multiple sub-models, and real-time monitoring and analysis of the rail transit network in the dual-high mode is achieved through this model. It should be noted that the purpose of this embodiment is not only to match and analyze the data to determine whether there is abnormal data, but more importantly, it is the specific design of multiple sub-models. These technical contents have been applied in reality and have specifically solved related technical problems. The setting of each sub-model not only meets the corresponding scenario requirements but also meets the interaction between multiple sub-models, and the reasonable operation of the entire rail transit network model, and therefore has strong practical significance.

[0072] It should be noted that in practice, monitoring platforms, local equipment and remote equipment can also be set up. The monitoring platform mainly includes monitoring servers, monitoring terminals, etc. It is responsible for real-time monitoring of the working status of local equipment, remote equipment and power supply cables. Various types of remote operations on the site can be achieved through the platform. The local equipment is mainly composed of power conversion modules, monitoring units, etc. The local equipment is placed near the nearest transformer, takes stable AC power, converts it into 800V DC, and transmits DC power to the section through a two-core power supply cable. It has an insulation monitoring function and can monitor line insulation changes for timely processing to prevent insulation degradation from affecting system power supply. Remote equipment: mainly composed of power modules, suppression modules, monitoring units, etc. It is placed at the end of the power supply equipment in the section, converts the DC power transmitted by the power supply cable into the power type required by the user, and monitors the working status of the power supply cable and remote equipment, and performs fault location, isolation, alarm and data upload.

[0073] In a second aspect, the present invention provides a device for the rail transit network communication method as described in the first aspect, such as Figure 2 As shown, the device 20 comprises:

[0074] The acquisition module 201 is used to acquire the network status data in the rail transit network in real time;

[0075] An input module 202, used for inputting the network status data into a pre-built rail transit network model of a dual-high mode;

[0076] Processing module 203, used for the rail transit network model to extract the type of the network status data and generate a corresponding thread and then enter the corresponding sub-model for matching. If there is an abnormality, an alarm message is issued;

[0077] Among them, the rail transit network model is composed of a wireless network distribution sub-model in the station, a tunnel wireless distribution sub-model, a tunnel power supply sub-model, a tunnel transmission network sub-model, a computer room supporting sub-model and a multi-scene switching sub-model, and the type of the network status data is based on one or more data generated in the wireless network distribution sub-model, the tunnel wireless distribution sub-model, the tunnel power supply sub-model, the tunnel transmission network sub-model, the computer room supporting sub-model and the multi-scene switching sub-model.

[0078] Figure 3 An example of a physical structure diagram of an electronic device is shown. Figure 3 As shown, the electronic device 300 may include: a processor 310, a communication interface 320, a memory 330 and a communication bus 340, wherein the processor 310, the communication interface 320 and the memory 330 communicate with each other through the communication bus 340. The processor 310 may call the computer program in the memory 330 to implement the steps of the rail transit network communication method.

[0079] In addition, the logic instructions in the above-mentioned memory 330 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0080] The processor-readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc.), optical storage (such as CD, DVD, BD, HVD, etc.), and semiconductor storage (such as ROM, EPROM, EEPROM, non-volatile memory (NANDFLASH), solid-state drive (SSD)), etc.

[0081] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0082] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rail transit network communication method based on a dual-high mode, characterized in that: The method comprises the following steps: Obtain network status data in rail transit network in real time; Inputting the network status data into a pre-built dual-high mode rail transit network model; The rail transit network model extracts the type of the network status data and generates a corresponding thread, then enters the corresponding sub-model for matching, and issues an alarm message if an abnormality exists; Among them, the rail transit network model is composed of a wireless network distribution sub-model in the station, a tunnel wireless distribution sub-model, a tunnel power supply sub-model, a tunnel transmission network sub-model, a computer room supporting sub-model and a multi-scene switching sub-model, and the type of the network status data is based on one or more data generated in the wireless network distribution sub-model, the tunnel wireless distribution sub-model, the tunnel power supply sub-model, the tunnel transmission network sub-model, the computer room supporting sub-model and the multi-scene switching sub-model.

2. The rail transit network communication method according to claim 1, characterized in that: The wireless network distribution submodel in the station consists of a three-layer structure based on BBU, Hub and RF Uint. The BBU layer divides the active room into an extended pico base station based on 86CPU architecture and a distributed pico base station based on ASIC architecture. The RF Unit layer divides the active room into 5G single-mode devices and 2G / 4G / 5G multi-mode devices.

3. The rail transit network communication method according to claim 1, characterized in that: The tunnel wireless distribution sub-model adopts tunnel leaky cable and 5 / 4 leaky cable to support 5G frequency band, wherein the leaky cable is installed on one side of the tunnel wall, the hanging height of the leaky cable should be within the height range of subway train windows, the height range of the train windows is 2.0-2.9m above the rail plane, and the spacing between the leaky cables is not less than 4 times the spacing of the wavelength.

4. The rail transit network communication method according to claim 1, characterized in that: The tunnel power supply sub-model adopts a 380V three-phase power supply and introduces a 380V three-phase power supply through the subway machine room and then connects to the tunnel breakpoint AC distribution box, where the breakpoint draws power from the subway machine room, an AC distribution box is installed at each breakpoint, and the power cables are selected according to the maximum allowable voltage drop principle.

5. The rail transit network communication method according to claim 4, characterized in that: The maximum permissible pressure drop is 10%.

6. The rail transit network communication method according to claim 1, characterized in that: The tunnel transmission network sub-model includes a work well located outside the entry station for wireless network access, BBU to breakpoint based on the machine room to breakpoint to RRU extension and tunnel machine room ring, wherein two entry stations are selected for a subway line, and the tunnel machine room ring is used to form a ring between the entry stations.

7. The rail transit network communication method according to claim 1, characterized in that: The computer room supporting sub-model includes the AC distribution box, DC power supply system, battery backup system, grounding system and air-conditioning system for powering the computer room. The capacity of the AC distribution box is 380V / 150A, and the horizontal wiring rack in the computer room is installed with a floor-standing vertical wiring rack as support, and the distance between the two supports is not more than 2 meters.

8. The rail transit network communication method according to claim 1, characterized in that: The multi-scenario switching sub-model includes a tunnel entrance scenario and a station entrance and exit scenario. In the tunnel entrance scenario, a mode of adding a directional antenna to the end of a leaky cable is adopted, and an outdoor directional antenna is used at the intersection of each tunnel and the ground to radiate the signal in the tunnel to the outdoors along the tunnel direction; the station entrance and exit scenario includes the first signal switching of users entering and exiting the subway station and the second signal switching between the station hall and the platform. In the first signal switching, an omnidirectional ceiling antenna is installed on the top of the middle position of the escalator, and in the second signal switching, an omnidirectional antenna is deployed at the upper and lower positions of the escalator.

9. A device based on the rail transit network communication method according to any one of claims 1 to 8, characterized in that: The device comprises: An acquisition module is used to acquire network status data in the rail transit network in real time; An input module is used to input the network status data into a pre-built dual-high mode rail transit network model; a processing module is used for the rail transit network model to extract the type of the network status data and generate a corresponding thread and then enter the corresponding sub-model for matching. If there is an abnormality, an alarm message is issued; Among them, the rail transit network model is composed of a wireless network distribution sub-model in the station, a tunnel wireless distribution sub-model, a tunnel power supply sub-model, a tunnel transmission network sub-model, a computer room supporting sub-model and a multi-scene switching sub-model, and the type of the network status data is based on one or more data generated in the wireless network distribution sub-model, the tunnel wireless distribution sub-model, the tunnel power supply sub-model, the tunnel transmission network sub-model, the computer room supporting sub-model and the multi-scene switching sub-model.

10. An electronic device comprising a processor and a memory storing a computer program, characterized in that: When the processor executes the computer program, the steps of the rail transit network communication method according to any one of claims 1 to 8 are implemented.

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