Mining communication system and method integrating cellular communication and direct communication

Abstract

The invention discloses a cellular communication and direct communication fused mining communication system and method, the system comprises a first subsystem and / or a second subsystem, the first subsystem is used for cellular communication, and the second subsystem is used for direct communication. Comprising a mining core network device, a mining bearer network device, a mining base station device, a mining terminal device and a mining cellular communication transmission network. And the second subsystem is used for carrying out direct connection communication and comprises mining direct connection communication terminal equipment, mining direct connection communication roadway side equipment and a mining direct connection communication transmission network. According to the invention, the complexity of information transmission and interaction can be reduced, the transmission capability with low time delay and high reliability is provided, and the uplink transmission overload of the mining cellular network is relieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent mine communication, and in particular relates to a mine communication system and method integrating cellular communication and direct connection communication. Background Art

[0002] In order to achieve a production mode with fewer people and no human involved, coal mines have currently achieved regional coverage of wireless networks such as 5G and WiFi. First of all, WiFi works in unlicensed frequency bands and needs to meet the regulatory requirements for unlicensed frequency bands, including channel occupied bandwidth and channel access mechanism. Compared with the licensed frequency band, the resource utilization rate of working in the unlicensed frequency band is low, and the reliability of communication cannot be guaranteed when the system is relatively congested. It is not suitable for applications with high requirements for latency and reliability, such as automatic driving and equipment control in coal mines. 5G cellular networks require the deployment of terminals, base stations, bearer networks, and core networks. The information interaction process is relatively complex. At present, the cost of achieving 5G cellular network coverage for mines is relatively high. With the in-depth construction of smart mines, intelligent applications are more diverse, resulting in a further increase in the load of cellular network uplink transmission. It is urgent to explore low-latency and high-reliability network deployment and wireless transmission solutions. Summary of the invention

[0003] In order to solve the deficiencies in the prior art, the present invention provides a mining communication system and method to solve the technical problems that the information interaction process of the mining communication system is complex and there is an uncontrollable transmission risk, there is a lack of low-latency and high-reliability short-range communication solutions based on authorized frequency bands, and the uplink transmission demand for underground coal mine communications significantly causes cellular network overload.

[0004] The present invention adopts the following technical solution.

[0005] The first aspect of the present invention provides a mine communication system integrating cellular communication and direct communication, including a first subsystem and / or a second subsystem. The first subsystem is used for cellular communication, including a mine core network device, a mine bearer network device, a mine base station device, a mine terminal device and a mine cellular communication transmission network; the second subsystem is used for direct communication, including a mine direct communication terminal device, a mine direct communication lane side device and a mine direct communication transmission network.

[0006] Optionally, the mine direct communication terminal equipment and the mine direct communication lane side equipment perform time synchronization, including: the mine direct communication lane side equipment is connected to the timing server via a wired manner and performs time synchronization; the mine direct communication terminal equipment communicates with the mine direct communication lane side equipment via the mine direct communication transmission network and performs time synchronization.

[0007] Optionally, the mining communication system determines the services carried and transmitted by the first subsystem and the second subsystem based on a dual-link service adaptation mechanism.

[0008] Optionally, the dual-link service adaptation mechanism includes: determining to allocate the service to the first subsystem or the second subsystem for carrying and transmission based on at least one of the following indicators: service cycle, service reliability requirement, service volume, service type, terminal device type and terminal device working area.

[0009] Optionally, when the service cycle is greater than a first threshold value, the corresponding service is allocated to the first subsystem for carrying and transmission; and / or, when the service reliability requirement is less than a second threshold value, the corresponding service is allocated to the first subsystem for carrying and transmission; and / or, when the service volume is greater than a third threshold value, the corresponding service is allocated to the first subsystem for carrying and transmission; when the terminal device type is a mining mobile phone terminal and / or a mining CPE (Customer Premise Equipment), the corresponding service is allocated to the first subsystem for carrying and transmission; and / or, when the working area of ​​the terminal device is the first area, the corresponding service is allocated to the first subsystem for carrying and transmission.

[0010] Optionally, when the service cycle is less than or equal to the first threshold value, the corresponding service is allocated to the second subsystem for carrying and transmission; and / or, when the service reliability requirement is greater than or equal to the second threshold value, the corresponding service is allocated to the second subsystem for carrying and transmission; and / or, when the service volume is less than or equal to the third threshold value, the corresponding service is allocated to the second subsystem for carrying and transmission; and / or, when the terminal equipment type is a mine direct communication terminal equipment and / or a mine direct communication lane side equipment, the corresponding service is allocated to the second subsystem for carrying and transmission; and / or, when the terminal equipment working area is the second area, the corresponding service is allocated to the second subsystem for carrying and transmission.

[0011] Optionally, the first area includes at least one of the following: underground coal mine tunnels, electromechanical chambers and shafts.

[0012] Optionally, the second area includes at least one of the following: a comprehensive mining working face and a tunneling working face.

[0013] Optionally, determining to allocate the service to the first subsystem or the second subsystem for carrying and transmission according to the service type includes: the first subsystem is used to carry and transmit the first type of mining service, and the second subsystem is used to carry and transmit the second type of mining service.

[0014] Optionally, the first type of mining service includes at least one of the following: voice service, image service, video service, map update service, remote control service, transportation dispatch service, perception service and data recording information of the second type of mining service; the data recording information of the second type of mining service is used to record the driving behavior of underground vehicles in coal mines and / or the adjacent control behavior of underground equipment in coal mines;

[0015] The second category of mining services includes at least one of the following: underground coal mine automatic driving services, underground coal mine equipment proximity control services and underground coal mine emergency communication services; the underground coal mine automatic driving services include at least one of the following: vehicle collaborative perception services, collision warning services, driving strategy collaborative services and underground traffic light phase services; the underground coal mine equipment proximity control services include at least one of the following: services for controlling coal mining equipment, services for controlling hydraulic supports, services for controlling tunneling equipment and services for controlling main transport equipment.

[0016] Optionally, the second subsystem is used to carry and transmit the second type of mining services, including: configuring the priority of the underground coal mine emergency communication services to be higher than the priority of the underground coal mine proximity control services to be higher than the priority of the underground coal mine automatic driving services.

[0017] Optionally, the second subsystem is used to carry the coal mine underground equipment proximity control type service in the second category of mining services, including: the second subsystem reserves a first transmission resource for transmitting the coal mine underground equipment proximity control type service; wherein the first transmission resource is the time domain resource and / or frequency domain resource of the dedicated frequency band corresponding to the mine direct communication technology.

[0018] Optionally, the mine communication information sent by the first device is transmitted to the second device in a point-to-point transmission mode; or, the mine communication information sent by the first device is transmitted to the third device in an intra-group transmission mode. The first device and the second device are mine direct communication terminal devices or mine direct communication lane side devices; the third device is at least one mine direct communication terminal device or mine direct communication lane side device.

[0019] Optionally, the mine communication information includes at least one of the following:

[0020] First identification information, used to indicate the identification of the terminal device that sends the mining communication information;

[0021] The second identification information is used to indicate the identification of the terminal device receiving the mining communication information;

[0022] First location information, used to indicate the area where the terminal device sending the mining communication information is located;

[0023] The second location information is used to indicate the area information where the terminal device receiving the mining communication information is located.

[0024] Optionally, the mining communication information sent by the first device adopts a point-to-point transmission mode to the second device, including: the first device sends the mining communication information in a broadcast transmission manner; the second device receives and decodes the mining communication information; the second device determines whether the second identification information in the mining communication information is its own device identification information, and if so, determines that the mining communication information is valid information; if not, determines that the mining communication information is invalid information, and performs a packet loss operation.

[0025] Optionally, the mining communication information sent by the first device adopts the intra-group transmission mode to the third device, including: the first device sends the mining communication information in a broadcast transmission manner; the third device receives and decodes the mining communication information; the third device determines whether the second identification information in the mining communication information is the identification information of the group to which its own device belongs, and if so, the mining communication information is determined to be valid information; if not, the mining communication information is determined to be invalid information, and a packet loss operation is performed.

[0026] Optionally, the second subsystem also includes: the fourth device forwards the received mining communication information to the fifth device via a wired method or a wireless method based on direct communication technology; wherein the fourth device and the fifth device are mining direct communication terminal devices or mining direct communication lane side devices and the fifth device is an associated device of the fourth device.

[0027] Optionally, the second subsystem further includes: a fourth device determines a control instruction response time in the mining communication information; the fourth device sends the control instruction response time to a fifth device; the fifth device receives and confirms the control instruction response time sent by the fourth device; the fourth device and the fifth device execute the control instruction based on the control instruction response time. Or, a first preset time and a second preset time are obtained; the fourth device executes the control instruction after forwarding the control instruction for the first preset time; the fifth device executes the control instruction after receiving the control instruction forwarded by the fourth device for the second preset time.

[0028] Optionally, the mining communication system further includes: mining production equipment control including manual control and / or remote control based on the first subsystem and / or proximity control based on the second subsystem.

[0029] Optionally, the priority of manual control is higher than the priority of remote control based on the first subsystem, which is higher than the priority of proximity control based on the second subsystem; or, the priority of manual control is higher than the priority of proximity control based on the second subsystem, which is higher than the priority of remote control based on the first subsystem.

[0030] The second aspect of the present invention provides a mine communication method, comprising: using a first subsystem for cellular communication, the first subsystem includes mine core network equipment, mine bearer network equipment, mine base station equipment, mine terminal equipment and mine cellular communication transmission network; using a second subsystem for direct communication, the second subsystem includes mine direct communication terminal equipment, mine direct communication lane side equipment and mine direct communication transmission network.

[0031] Compared with the prior art, the beneficial effects of the present invention include at least:

[0032] The present invention proposes a mine direct communication system based on mine direct communication technology and a fusion solution of the mine direct communication system and the mine cellular communication system, including a time synchronization mechanism, a direct communication and cellular communication dual-link service adaptation mechanism, a proximity control solution, a communication information transmission solution, etc., which can realize dual-system fusion, reduce communication delay, alleviate the overload of uplink transmission of the mine cellular network, and improve system reliability. And through the dual-link service adaptation mechanism, the reasonable mapping of communication data in the cellular communication link and the direct communication link is realized, the system load is reduced, and the transmission of key core data in the coal mine is realized, reducing the risk of communication data leakage. The present invention provides a low-latency and high-reliability wireless communication technology working in an authorized frequency band, which can be applied to applications such as proximity control of underground equipment in coal mines and automatic driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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 creative labor. Among them:

[0034] Figure 1 A schematic diagram of a mining communication system provided by an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of a mining communication information processing flow in a mining communication system provided by an embodiment of the present invention;

[0036] Figure 3 A schematic diagram of a mining communication information processing flow in another mining communication system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described in this application are only embodiments of a part of the present invention, rather than all embodiments. Based on the spirit of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention.

[0038] In cellular communication, the communication between terminals requires the participation of base stations, bearer networks, core networks and other equipment, and direct communication between terminals cannot be achieved. This not only increases the cost of network equipment deployment, but also makes the data transmission and interaction process more complicated. There are many interference factors in communication delay and reliability, such as the interruption of communication links due to broken optical fibers or the loss of communication data due to the failure of controller forwarding. In addition, base stations and bearer network equipment are generally deployed underground, and core network equipment is often deployed above ground. Therefore, for mining cellular networks, communication data still needs to be transmitted to the surface, increasing the risk of data leakage during transmission.

[0039] The wireless communication candidate technologies currently available for underground coal mines include 5G, WiFi, Bluetooth, and direct communication. First, 5G is not suitable for short-distance communication, especially for autonomous driving and equipment control applications, because even if the distance between terminal devices is short, the communication data still needs to go through the underground network-surface network-underground network transmission path, and the transmission delay will be significantly increased. In addition, there will be uncontrollable risks in the transmission link as mentioned above; secondly, WiFi works in unlicensed frequency bands, and the full-bandwidth transmission mode will lead to low utilization of communication resources, and the channel access mechanism needs to be executed before transmission, so the communication delay cannot be guaranteed, especially in the case of system congestion. The communication performance will deteriorate sharply; then, in addition to the technical shortcomings of unlicensed frequency bands, the communication rate that Bluetooth can support is insufficient, and it is also unable to support mining business well.

[0040] Coal mine underground communication application scenarios, such as high-definition image backhaul and video streaming transmission, have put forward higher requirements on the performance of 5G cellular networks, with the characteristics of uplink transmission capacity and transmission rate. Considering the deeper and wider intelligent applications of coal mines in the future, if a single 5G cellular network communication method is still used, first of all, the network load will be further increased from the perspective of business volume, and secondly, the current traditional independent 5G cellular network cannot well meet the requirements of low latency and high reliability.

[0041] Therefore, in response to the above problems, the mine communication system needs to propose a targeted system architecture to meet the needs of low-latency and high-reliability network deployment and wireless transmission.

[0042] The present application is described in detail below with reference to specific embodiments.

[0043] Combination Figure 1 As shown, Embodiment 1 of the present invention provides a mine communication system 100 integrating cellular communication and direct communication, including: a first subsystem 110 and / or a second subsystem 120. Among them, the first subsystem 110 is used for cellular communication. The second subsystem 120 is used for direct communication. The first subsystem 110 includes a mine core network device, a mine bearer network device, a mine base station device, a mine terminal device, and a mine cellular communication transmission network. The second subsystem 120 includes a mine direct communication terminal device, a mine direct communication lane side device, and a mine direct communication transmission network.

[0044] Specifically, the mine communication system can be a C-V2X (Cellular Vehicle-to-Everything) communication system, which can support both cellular communication and direct communication, or a cellular communication system and a C-V2X communication system, where the cellular communication system supports cellular communication and the C-V2X communication system supports direct communication. The cellular vehicle-to-everything communication system can also be referred to as a direct communication system.

[0045] SL (Sidelink) technology enables direct communication between terminal devices without the involvement of base stations, bearer networks, and core networks.

[0046] The mine terminal equipment in the first subsystem 110 and the mine direct communication terminal equipment in the second subsystem 120 can be a terminal form, that is, the terminal can support both cellular communication and direct communication; the mine terminal equipment in the first subsystem 110 and the mine direct communication lane-side equipment in the second subsystem 120 can be a terminal form, that is, the terminal can support both cellular communication and direct communication.

[0047] In this embodiment, the integration of direct communication technology and cellular communication technology in underground coal mines is realized. Compared with the existing technology, it can reduce the latency of the mine communication system, improve reliability and reduce network deployment costs.

[0048] Optionally, the cellular communication technology adopted by the first subsystem 110 includes at least one of the following: 4G technology, 5G technology and 6G technology; the direct communication technology adopted by the second subsystem 120 includes at least one of the following: LTE-V2X technology, NR-V2X technology and NR SL technology.

[0049] It is understandable that neither the first subsystem 110 nor the second subsystem 120 specifically refers to a fixed subsystem. The cellular communication technology used by the first subsystem 110 includes but is not limited to 4G, 5G or subsequent evolved versions of cellular communication technology; the direct communication technology used by the second subsystem 120 includes but is not limited to LTE-V2X, NR-V2X, NR SL (including SL-U, SL FR2, SL CA, SL Positioning, etc.) or subsequent evolved versions of direct communication technology. For example, the cellular communication technology used by the first subsystem 110 is 5G, and the direct communication technology used by the second subsystem 120 is LTE-V2X.

[0050] Optionally, the mining communication system 100 further includes a timing server for providing high-precision time calibration services.

[0051] Optionally, the mine direct communication terminal equipment and the mine direct communication lane side equipment perform time synchronization, including: the mine direct communication lane side equipment is connected to the timing server via a wired manner and performs time synchronization; the mine direct communication terminal equipment communicates with the mine direct communication lane side equipment via the mine direct communication transmission network and performs time synchronization.

[0052] Since underground equipment in coal mines cannot directly receive GNSS (Global Navigation Satellite System) signals, it is impossible to use conventional means to perform time synchronization, which is a prerequisite and necessary condition for communication. If the time synchronization problem is not solved, the second subsystem cannot work properly.

[0053] This embodiment provides a method for time synchronization of a mine direct communication terminal device and a mine direct communication lane side device in combination with a device deployment strategy. The mine direct communication lane side device is generally installed at a fixed position on a working face or lane, so it is suitable for time synchronization by wired means, while the mine direct communication terminal device often moves, and can be indirectly synchronized with the mine direct communication lane side device by direct communication. The present invention ensures time synchronization between different communication devices, thereby ensuring the reliability of communication and information transmission between different communication devices.

[0054] Optionally, the mining communication system 100 determines the services carried and transmitted by the first subsystem 110 and the second subsystem 120 based on a dual-link service adaptation mechanism.

[0055] Optionally, the dual-link service adaptation mechanism includes: determining whether to allocate the service to the first subsystem 110 or the second subsystem 120 for carrying and transmission based on at least one of the following indicators: service cycle, service reliability requirements, service volume, service type, terminal device type and terminal device working area.

[0056] Further, when the service cycle is greater than the first threshold value, the corresponding service is allocated to the first subsystem 110 for carrying and transmission; and / or, when the service reliability requirement is less than the second threshold value, the corresponding service is allocated to the first subsystem 110 for carrying and transmission; and / or, when the service volume is greater than the third threshold value, the corresponding service is allocated to the first subsystem 110 for carrying and transmission; and / or, when the terminal device type is a mining mobile phone terminal and / or mining CPE, the corresponding service is allocated to the first subsystem 110 for carrying and transmission; and / or, when the working area of ​​the terminal device is the first area, the corresponding service is allocated to the first subsystem 110 for carrying and transmission.

[0057] Further, when the service cycle is less than or equal to the first threshold value, the corresponding service is allocated to the second subsystem 120 for carrying and transmission; and / or, when the service reliability requirement is greater than or equal to the second threshold value, the corresponding service is allocated to the second subsystem 120 for carrying and transmission; and / or, when the service volume is less than or equal to the third threshold value, the corresponding service is allocated to the second subsystem 120 for carrying and transmission; and / or, when the terminal equipment type is a mining vehicle-mounted terminal equipment and / or a mining tunnel side equipment, the corresponding service is allocated to the second subsystem 120 for carrying and transmission; and / or, when the working area of ​​the terminal equipment is the second area, the corresponding service is allocated to the second subsystem 120 for carrying and transmission.

[0058] In one embodiment, the first threshold value is 50ms, the second threshold value is 99.99%, and the third threshold value is 2000 bytes. In one embodiment, the reliability requirement corresponding to the service is determined when the service is generated, for example, the reliability requirement of the control service is 99.99% and the reliability requirement of the video service is 99%.

[0059] It should be noted that the present invention does not limit the specific values ​​of the first threshold value, the second threshold value and the third threshold value. Those skilled in the art set the specific values ​​of the first threshold value, the second threshold value and the third threshold value according to actual applications.

[0060] Specifically, the first area includes at least one of the following: underground coal mine tunnels, electromechanical chambers and shafts; the second area includes at least one of the following: fully mechanized mining faces and excavation faces. This is mainly because the first subsystem is suitable for services that require large bandwidth, such as video surveillance, and the second subsystem is suitable for regional proximity control. Therefore, it can be applied to the regional production equipment proximity control of fully mechanized mining faces and excavation faces.

[0061] In this embodiment, the services are allocated to different systems for carrying and transmission through various indicators. On the one hand, the services can be diverted to reduce the load of a single system and ensure the transmission performance of communication. On the other hand, different systems can be made to play their respective technical characteristics and advantages. For example, cellular communication is more suitable for carrying large bandwidth and delay-insensitive services, while direct communication is more suitable for carrying services with moderate data volume and high delay and reliability requirements.

[0062] Optionally, determining to allocate the service to the first subsystem or the second subsystem for carrying and transmission according to the service type includes: the first subsystem 110 is used to carry and transmit the first type of mining service, and the second subsystem 120 is used to carry and transmit the second type of mining service.

[0063] Specifically, the first category of mining services includes at least one of the following: voice services, image services, video services, map update services, remote control services, transportation scheduling services, perception services, and data recording information of the second category of mining services; the data recording information of the second category of mining services is used to record vehicle driving behavior and / or adjacent control behavior underground in coal mines.

[0064] The second category of mining services includes at least one of the following: underground coal mine automatic driving services, underground coal mine proximity control services and underground coal mine emergency communication services; the underground coal mine automatic driving services include at least one of the following: vehicle collaborative perception services, collision warning services, driving strategy collaborative services and underground traffic light phase services; the underground coal mine proximity control services include at least one of the following: services for controlling coal mining equipment, services for controlling hydraulic supports, services for controlling tunneling equipment and services for controlling main transport equipment.

[0065] Furthermore, the second subsystem 120 also includes: transmitting the data recording information of the second type of mining services to the coal mine centralized control center via the mining cellular network.

[0066] In this embodiment, by recording the data recording information of the second type of mining business, the control center on the well can record and monitor the vehicle driving behavior or adjacent control behavior underground, and can fully understand the operation status and operation behavior of the underground equipment, and then conduct an overall analysis of the system operation, so as to take over temporarily under special circumstances.

[0067] Optionally, the second subsystem 120 for carrying the second type of mining services also includes: configuring the priority of the underground coal mine emergency communication services to be higher than the priority of the underground coal mine proximity control services to be higher than the priority of the underground coal mine automatic driving services.

[0068] Specifically, the second subsystem 120 is used to carry the second type of mining services and further includes: configuring the underground coal mine emergency communication services as the highest priority, and configuring the underground coal mine proximity control services to have a higher priority than the underground coal mine automatic driving services.

[0069] Specifically, if there is no coal mine underground emergency communication service, the second subsystem 120 for carrying the second type of mining service also includes: configuring the priority of the coal mine underground proximity control service to be higher than the priority of the coal mine underground automatic driving service.

[0070] Particularly, the above configuration method may be a pre-configuration method.

[0071] Optionally, the second subsystem 120 is used to carry the coal mine underground equipment proximity control service in the second type of mining service, including: the second subsystem 120 reserves a first transmission resource for transmitting the coal mine underground proximity control service. The first transmission resource is a time domain resource and / or a frequency domain resource of a dedicated frequency band corresponding to the mine direct communication technology.

[0072] Specifically, the time domain resources and / or frequency domain resources are part or all of a dedicated frequency band.

[0073] Optionally, the second subsystem 120 further includes: determining a first transmission resource corresponding to the service based on the service type.

[0074] For example, the frequency domain includes a total of 5 sub-channels. The underground coal mine automatic driving services occupy the first sub-channel and the second sub-channel, the underground coal mine equipment proximity control services occupy the third sub-channel and the fourth sub-channel, and the underground coal mine emergency communication services occupy the fifth sub-channel; or, only the first transmission resource is reserved for the underground coal mine emergency communication services, and the first transmission resource is the fifth sub-channel.

[0075] Optionally, the mine communication information sent by the first device adopts a point-to-point transmission mode to the second device; or, the mine communication information sent by the first device adopts an intra-group transmission mode to the third device; wherein the first device and the second device are mine direct communication terminal devices or mine direct communication lane-side devices; the third device is at least one mine direct communication terminal device or mine direct communication lane-side device.

[0076] Optionally, the mine communication information includes at least one of the following:

[0077] First identification information, used to indicate the identification of the terminal device that sends the mining communication information;

[0078] The second identification information is used to indicate the identification of the terminal device receiving the mining communication information;

[0079] First location information, used to indicate the area where the terminal device sending the mining communication information is located;

[0080] The second location information is used to indicate the area information where the terminal device receiving the mining communication information is located.

[0081] Furthermore, combined with Figure 2 As shown, the mining communication information sent by the first device adopts a point-to-point transmission mode to the second device, including: the first device sends the mining communication information in a broadcast transmission manner; the second device receives and decodes the mining communication information; the second device determines whether the second identification information in the mining communication information is its own device identification information, and if so, the mining communication information is determined to be valid information; if not, the mining communication information is determined to be invalid information, and a packet loss operation is performed.

[0082] Furthermore, the mining communication information sent by the first device adopts the intra-group transmission mode to the third device, including: the first device sends the mining communication information in a broadcast transmission manner; the third device receives and decodes the mining communication information; the third device determines whether the second identification information in the mining communication information is the identification information of the group to which its own device belongs, and if so, determines that the mining communication information is valid information; if not, determines that the mining communication information is invalid information, and performs a packet loss operation.

[0083] It should be noted that the transmission mode of the mine direct communication technology here is broadcast (that is, all terminals except the sending terminal can receive it), and the mine communication information sent by the mine terminal is determined by the preset mine receiving terminal to determine whether the message is valid. The "point-to-point transmission" and "intra-group transmission" mentioned here are not equivalent to the existing unicast and multicast communication modes in communication. Unicast and multicast are through indicating valid receiving devices in the control information (carried on PSCCH), and invalid receiving devices do not need to decode the mine communication information (carried on PSSCH). Point-to-point transmission means that the mine communication information (data information) sent by a mine terminal is only received, decoded and applied by another mine terminal, and other mine terminals lose packets after receiving and decoding; intra-group transmission means that the mine communication information (data information) sent by a mine terminal can be received, decoded and applied by all terminals in the group where the terminal is located, and other terminals outside the group lose packets after receiving and decoding. The unicast and multicast methods determine the effective receiving terminals through control information, while the "point-to-point transmission" and "intra-group transmission" determine the effective receiving terminals through additional parameters and / or elements carried in the data information (mining communication information), namely the first identification information, the second identification information, the first location information and the second location information.

[0084] Optionally, combined Figure 3 As shown, the second subsystem 120 also includes:

[0085] The fourth device forwards the received mine communication information to the fifth device via a wired method or a wireless method based on direct communication technology. The fourth device and the fifth device are mine direct communication terminal devices or mine direct communication lane side devices, and the fifth device is an associated device of the fourth device.

[0086] Specifically, the forwarding condition is that the mine communication information contains both the second identification information of the fourth device and the second identification information of the fifth device, or the ID of the fifth device is the associated ID of the fourth device. For example, the ID of the mine direct communication terminal device on the hydraulic support 1 is "1101"; the mine direct communication terminal device on the hydraulic support 2 is "1111", the first two digits "11" indicate that the terminal type is a mine direct communication terminal device, and the last two digits "01" or "11" represent the number. Assuming that the fourth device is the mine direct communication terminal device "1100", the associated devices of the fourth device are all other mine direct communication terminals, that is, the fifth device includes "1101" and "1111"; or, the fifth device is a device of the same type deployed in the same working face and / or lane as the fourth device, for example, all mine direct communication terminal devices are located in the comprehensive mining working face; or, the fourth device directly forwards the received mine information to its associated devices without distinction, that is, all other terminals can be understood as the fifth device.

[0087] This embodiment can realize centralized control of equipment groups, considering that the fourth device can receive mining information, but the fifth device cannot receive mining information sent by other terminals due to long communication distance or obstruction. The advantage is that redundant transmission of information can be realized, the probability of successful reception of information is increased, and joint control of equipment groups is guaranteed.

[0088] Specifically, combined Figure 3 As shown, the fourth device is the first receiving terminal, the fifth device is the second receiving terminal, the first receiving terminal and the second receiving terminal are different terminals installed at different positions of the same device (such as a tunneling machine) or are different terminals installed on different hydraulic supports in a hydraulic support group. The second receiving terminal cannot receive the mining information sent by the sending terminal due to the equipment blocking, that is, it cannot realize the control of the device corresponding to the second receiving terminal. However, the second receiving terminal is an associated terminal of the first receiving terminal, so the first receiving terminal can forward the received mining information to the second receiving terminal, thereby realizing the joint control of the first receiving terminal and the second receiving terminal.

[0089] Optionally, the second subsystem 120 further includes:

[0090] The fourth device determines the control instruction response time and sends the control instruction response time to the fifth device. After the fifth device receives and confirms the control instruction response time sent by the fourth device, the fourth device and the fifth device execute the control instruction based on the control instruction response time; and / or obtains the first preset time and the second preset time, the fourth device forwards the control instruction and executes the control instruction after the first preset time, and the fifth device executes the control instruction after the second preset time after the control instruction forwarded by the first device.

[0091] In this embodiment, by determining the response time of the control instruction, the problem of different execution times of the control instruction caused by the delay of information forwarding is solved, thereby reducing the system delay and improving reliability.

[0092] It should be noted that those skilled in the art can set specific values ​​of the first preset time and the second preset time according to actual conditions, and the embodiments of the present invention do not limit the specific values ​​of the first preset time and the second preset time.

[0093] Optionally, the mining communication system 100 further includes: mining production equipment control includes manual control and / or remote control based on the first subsystem and / or proximity control based on the second subsystem.

[0094] Optionally, the priority order of different types of device control is:

[0095] Mode 1: The priority of manual control is higher than the priority of remote control based on the first subsystem 110, which is higher than the priority of proximity control based on the second subsystem 120. Mode 2: The priority of manual control is higher than the priority of proximity control based on the second subsystem 120, which is higher than the priority of remote control based on the first subsystem 110.

[0096] Manual control is performed by underground workers, who can understand the underground environment and equipment operation status more accurately. In addition, considering the need for temporary takeover in emergency situations (such as emergency braking operations), manual control has a higher priority.

[0097] There are two understandings of the priority relationship between remote control and adjacent control: one is that considering that monitoring information and data recording information of adjacent control need to be transmitted to the control center on the well, that is, the control center can obtain more comprehensive information, so it is believed that the priority of remote control is higher than that of adjacent control. Another understanding is that considering that adjacent control can respond to the command input of underground workers, the effect is equivalent to manual control, so it is believed that the priority of adjacent control is higher than that of remote control. Therefore, it can be determined whether to adopt method 1 or method 2 based on different usage scenarios.

[0098] It should be noted that the priority here is used to give priority to the control behavior corresponding to the higher priority when different control behaviors conflict or contradict each other, and does not mean the priority corresponding to the transmission mentioned in the communication.

[0099] Embodiment 2 of the present invention provides a mine communication method, comprising:

[0100] A first subsystem is used for cellular communication, wherein the first subsystem includes a mine core network device, a mine bearer network device, a mine base station device, a mine terminal device and a mine cellular communication transmission network;

[0101] A second subsystem is used for direct communication, and the second subsystem includes mine direct communication terminal equipment, mine direct communication lane-side equipment and mine direct communication transmission network.

[0102] Compared with the prior art, the beneficial effects of the present invention include at least:

[0103] The present invention proposes a mine direct communication system based on mine direct communication technology and a fusion solution of the mine direct communication system and the mine cellular communication system, including a time synchronization mechanism, a direct communication and cellular communication dual-link service adaptation mechanism, a proximity control solution, a communication information transmission solution, etc., which can realize dual-system fusion, reduce communication delay, alleviate the overload of uplink transmission of the mine cellular network, and improve system reliability. And through the dual-link service adaptation mechanism, the reasonable mapping of communication data in the cellular communication link and the direct communication link is realized, the system load is reduced, and the transmission of key core data inside the coal mine is realized, reducing the risk of communication data leakage. The present invention provides a low-delay and high-reliability wireless short-range communication technology working in an authorized frequency band, which can be applied to applications such as proximity control of underground equipment in coal mines and automatic driving.

[0104] The present disclosure may be a system, a method and / or a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for causing a processor to implement various aspects of the present disclosure.

[0105] A computer-readable storage medium may be a tangible device that can hold and store instructions used by an instruction execution device. A computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples of computer-readable storage media (a non-exhaustive list) include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a raised structure in a groove on which instructions are stored, and any suitable combination of the foregoing. As used herein, a computer-readable storage medium is not to be interpreted as a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a fiber optic cable), or an electrical signal transmitted through a wire.

[0106] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, optical fiber transmissions, wireless transmissions, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing / processing device.

[0107] The computer program instructions for performing the operation of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages, such as Smalltalk, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. Computer-readable program instructions may be executed completely on a user's computer, partially on a user's computer, as an independent software package, partially on a user's computer, partially on a remote computer, or completely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., using an Internet service provider to connect via the Internet). In some embodiments, an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), may be personalized by utilizing the state information of the computer-readable program instructions, and the electronic circuit may execute the computer-readable program instructions, thereby realizing various aspects of the present disclosure.

[0108] 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 above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A mining communication system integrating cellular communication and direct communication, characterized in that: The system comprises a first subsystem and / or a second subsystem, wherein: The first subsystem is used for cellular communication, including mining core network equipment, mining bearer network equipment, mining base station equipment, mining terminal equipment and mining cellular communication transmission network; The second subsystem is used for direct communication, including mine direct communication terminal equipment, mine direct communication lane side equipment and mine direct communication transmission network.

2. The mine communication system according to claim 1, characterized in that: The mine direct communication terminal equipment and the mine direct communication lane side equipment are synchronized, including: The mine direct communication tunnel side equipment is connected to the timing server through wired mode and synchronizes the time; The mine direct communication terminal equipment communicates with the mine direct communication lane side equipment through the mine direct communication transmission network and performs time synchronization.

3. The mine communication system according to claim 1, characterized in that: The mine communication system determines the services carried and transmitted by the first subsystem and the second subsystem based on a dual-link service adaptation mechanism.

4. The mine communication system according to claim 3, characterized in that: The dual-link service adaptation mechanism includes: The allocation of the service to the first subsystem or the second subsystem for carrying and transmission is determined based on at least one of the following indicators: service cycle, service reliability requirement, service volume, service type, terminal device type and terminal device working area.

5. The mine communication system according to claim 4, characterized in that: When the service cycle is greater than the first threshold value, the corresponding service is allocated to the first subsystem for bearing and transmission; and / or, When the service reliability requirement is less than the second threshold value, allocating the corresponding service to the first subsystem for carrying and transmission; and / or, When the service volume is greater than a third threshold value, the corresponding service is allocated to the first subsystem for carrying and transmission; When the terminal device type is a mining mobile phone terminal and / or a mining CPE, the corresponding service is allocated to the first subsystem for carrying and transmission; and / or, When the working area of ​​the terminal equipment is the first area, the corresponding service is allocated to the first subsystem for bearing and transmission.

6. The mine communication system according to claim 4, characterized in that: When the service period is less than or equal to the first threshold value, allocating the corresponding service to the second subsystem for carrying and transmission; and / or, When the service reliability requirement is greater than or equal to the second threshold value, allocating the corresponding service to the second subsystem for bearing and transmission; and / or, When the service volume is less than or equal to the third threshold value, allocating the corresponding service to the second subsystem for bearing and transmission; and / or, When the terminal device type is a mine direct communication terminal device and / or a mine direct communication lane side device, the corresponding service is allocated to the second subsystem for carrying and transmission; and / or, When the working area of ​​the terminal equipment is the second area, the corresponding service is allocated to the second subsystem for bearing and transmission.

7. The mine communication system according to claim 5, characterized in that: The first area includes at least one of the following: underground coal mine tunnels, electromechanical chambers and shafts.

8. The mine communication system according to claim 6, characterized in that: The second area includes at least one of the following: a comprehensive mining working face and an excavation working face.

9. The mine communication system according to claim 4, characterized in that: Determining according to the service type to allocate the service to the first subsystem or the second subsystem for carrying and transmitting includes: the first subsystem is used to carry and transmit the first type of mining service, and the second subsystem is used to carry and transmit the second type of mining service.

10. The mine communication system according to claim 9, characterized in that: The first type of mining services includes at least one of the following: voice services, image services, video services, map update services, remote control services, transportation dispatch services, perception services, and data recording information of the second type of mining services; the data recording information of the second type of mining services is used to record the driving behavior of vehicles in coal mines and / or the adjacent control behavior of equipment in coal mines; The second category of mining services includes at least one of the following: underground coal mine automatic driving services, underground coal mine equipment proximity control services and underground coal mine emergency communication services; the underground coal mine automatic driving services include at least one of the following: vehicle collaborative perception services, collision warning services, driving strategy collaborative services and underground traffic light phase services; the underground coal mine equipment proximity control services include at least one of the following: services for controlling coal mining equipment, services for controlling hydraulic supports, services for controlling tunneling equipment and services for controlling main transport equipment.

11. The mine communication system according to claim 10, characterized in that: The second subsystem is used to carry and transmit the second type of mining services, including: configuring the priority of the coal mine underground emergency communication services to be higher than the priority of the coal mine underground proximity control services to be higher than the priority of the coal mine underground automatic driving services.

12. The mine communication system according to claim 10, characterized in that: The second subsystem is used to carry the coal mine underground equipment proximity control services in the second category of mining services, including: The second subsystem reserves the first transmission resource for transmitting the proximity control service of the underground equipment in the coal mine; wherein the first transmission resource is the time domain resource and / or frequency domain resource of the dedicated frequency band corresponding to the mine direct communication technology.

13. The mine communication system according to claim 1, characterized in that: The mining communication information sent by the first device is transmitted to the second device in a point-to-point transmission mode; or, The mining communication information sent by the first device is transmitted to the third device in an intra-group transmission mode; Among them, the first device and the second device are mine-used direct communication terminal devices or mine-used direct communication lane-side devices; the third device is at least one mine-used direct communication terminal device or mine-used direct communication lane-side device.

14. The mine communication system according to claim 13, characterized in that: Mine communication information includes at least one of the following: First identification information, used to indicate the identification of the terminal device that sends the mining communication information; The second identification information is used to indicate the identification of the terminal device receiving the mining communication information; First location information, used to indicate the area where the terminal device sending the mining communication information is located; The second location information is used to indicate the area information where the terminal device receiving the mining communication information is located.

15. The mine communication system according to claim 14, characterized in that: The mining communication information sent by the first device to the second device in a point-to-point transmission mode includes: The first device sends mining communication information in a broadcast transmission manner; The second device receives and decodes the mine communication information; The second device determines whether the second identification information in the mine communication information is its own device identification information. If yes, the mine communication information is determined to be valid information; if not, the mine communication information is determined to be invalid information and a packet loss operation is performed.

16. The mine communication system according to claim 14, characterized in that: The mining communication information sent by the first device to the third device in an intra-group transmission mode includes: The first device sends mining communication information in a broadcast transmission manner; The third device receives and decodes the mine communication information; The third device determines whether the second identification information in the mine communication information is the identification information of the group to which its own device belongs. If yes, the mine communication information is determined to be valid information; if not, the mine communication information is determined to be invalid information and a packet loss operation is performed.

17. The mine communication system according to claim 1, characterized in that: The second subsystem also includes: The fourth device forwards the received mining communication information to the fifth device via a wired method or a wireless method based on a direct communication technology; Among them, the fourth device and the fifth device are mine-used direct communication terminal devices or mine-used direct communication lane-side devices, and the fifth device is an associated device of the fourth device.

18. The mine communication system according to claim 17, characterized in that: The second subsystem also includes: The fourth device determines the control instruction response time in the mining communication information; The fourth device sends the control instruction response time to the fifth device; The fifth device receives and confirms the control instruction response time sent by the fourth device; The fourth device and the fifth device execute the control instruction based on the control instruction response time; or, Obtain a first preset time and a second preset time; The fourth device executes the control instruction after forwarding the control instruction for a first preset time; The fifth device executes the control instruction a second preset time after receiving the control instruction forwarded by the fourth device.

19. The mine communication system according to claim 1, characterized in that: The mine communication system also includes: The control of mining production equipment includes manual control and / or remote control based on the first subsystem and / or proximity control based on the second subsystem.

20. The mine communication system according to claim 19, characterized in that: The priority of manual control is higher than the priority of remote control based on the first subsystem, which is higher than the priority of proximity control based on the second subsystem; or, Manual control has a higher priority than proximity control based on the second subsystem, and proximity control has a higher priority than remote control based on the first subsystem.

21. A mine communication method, applied to the mine communication system according to any one of claims 1 to 20, characterized in that: The method comprises: A first subsystem is used for cellular communication, wherein the first subsystem includes a mine core network device, a mine bearer network device, a mine base station device, a mine terminal device and a mine cellular communication transmission network; A second subsystem is used for direct communication, and the second subsystem includes mine direct communication terminal equipment, mine direct communication lane-side equipment and mine direct communication transmission network.

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