Coal mine communication network system based on time-sensitive network

Abstract

The invention relates to the technical field of coal mine fully mechanized mining, in particular to a coal mine communication network system based on a time-sensitive network, and the system comprises a wired communication system, the backbone network of the wired communication system is composed of a plurality of TSN network switches which are in ring network topology connection, and the wired communication system is used for accessing coal mine equipment as a terminal to a TSN network; the wireless communication system is connected with the wired communication system, consists of wireless communication equipment compatible with a TSN protocol, and is used for accessing the coal mine equipment into a TSN network through wireless connection; a communication system based on a time sensitive network (TSN) is established, a real-time, determined and reliable communication network is provided for a coal mine production system, wired and wireless communication systems are adopted, the whole coal mine production control system is covered together, and the requirement of automatic control for data communication is met.

Description

Technical Field

[0001] The present application relates to the technical field of coal mine comprehensive mining, and in particular to a coal mine communication network system based on a time-sensitive network. Background Art

[0002] Time Sensitive Networking (TSN) is defined by the Institute of Electrical and Electronics Engineers (IEEE). It is a solution that provides deterministic services based on standard Ethernet technology. Its biggest feature is that it completes the transmission of data packets with a certain delay, thus meeting the stringent transmission requirements in the industrial field.

[0003] TSN provides microsecond-level deterministic services to ensure the real-time requirements of various industries. TSN can achieve 10us-level periodic transmission, which is better than the mainstream industrial Ethernet. In addition, TSN is oriented to various industries such as audio and video, industry, and automobiles, extending real-time to a higher level. TSN reduces the complexity of the entire communication network and realizes the simultaneous transmission of periodic data and non-periodic data. Taking industry as an example, the current periodic control data is transmitted using industrial Ethernet, and non-periodic data is transmitted using standard Ethernet. TSN can realize the transmission of periodic data and non-periodic data in the same network through its scheduling mechanism, further simplifying the network complexity in the entire communication.

[0004] Among the existing network transmission platforms in coal mines, most of them have adopted standard Ethernet as a universal communication transmission platform. As long as the equipment of each subsystem underground and above the mine complies with the standard Ethernet protocol, it can be connected to the communication system of the coal mine and has good compatibility. However, since Ethernet itself is a best-effort communication method, it is easy to bring great uncertainty to data transmission; and the coal mine network system not only has IT information network, but also more important production control OT network, which has many types of communication protocols, data types, communication equipment, and different types of equipment have different requirements for communication quality. Under the communication architecture of standard Ethernet, we can only try our best to ensure that the subsystems do not interfere with each other from the software through technical means such as VLAN division and QoS, and the certainty of key data transmission of equipment cannot be effectively guaranteed. In recent years, 5G communication technology has also begun to be applied to coal mines, but due to its network architecture and compatibility issues, it is difficult to apply it on a large scale in coal mines.

[0005] In summary, how to design an efficient and stable mine network communication technology is an urgent problem to be solved. Summary of the invention

[0006] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0007] To this end, the first purpose of this application is to propose a coal mine communication network system based on a time-sensitive network to solve the problems of the inability to effectively guarantee the certainty of key data transmission of equipment in existing technical means and unstable data transmission.

[0008] To achieve the above objectives, the first embodiment of the present application proposes a coal mine communication network system based on a time-sensitive network, including:

[0009] A wired communication system, wherein the backbone network of the wired communication system is composed of multiple TSN network switches connected in a ring network topology, and is used to connect coal mine equipment as a terminal to the TSN network;

[0010] The wireless communication system is connected to the wired communication system and is composed of wireless communication equipment compatible with the TSN protocol, and is used to connect coal mine equipment to the TSN network through wireless connection.

[0011] Preferably, the wired communication system and the wireless communication system adopt a communication architecture based on a time-sensitive network, and set the gated queue to reserve bandwidth for preset priority data for controlling data transmission.

[0012] Preferably, the wired communication system further comprises a branch network, which is composed of a plurality of TSN network switches adopting a ring, tree, star and chain network.

[0013] Preferably, it also includes a centralized network controller, which is connected to the wired communication system and the wireless communication system respectively, and is used to identify different types of data streams through a dedicated protocol, and perform calculations according to the data type and network structure, set different priorities and gating queues for different types of data streams, and dynamically configure the network.

[0014] Preferably, the wired communication system and the wireless communication system use time-sensitive network technology to provide a unified synchronization time.

[0015] Preferably, the wired communication system is connected to the coal mine information system using Ethernet.

[0016] Preferably, the wired communication system is connected to the wireless communication system using a TSN network switch.

[0017] Preferably, the equipment in the coal mine equipment that does not support network communication is connected to the wired communication system after conversion through a gateway.

[0018] Preferably, the TSN network switch is a layer 2 switch, which is used to place the wired communication system and the wireless communication system to work in the same layer 2 network.

[0019] Preferably, the TSN network switch supports 802.1AS, 802.1Qbv, 802.1Qbu, 802.1Qcc, 802.1Qci, and 802.1CB protocols.

[0020] The present application provides a coal mine communication network system based on a time-sensitive network. By building a communication system based on a time-sensitive network (TSN), a real-time, deterministic and reliable communication network is provided for the coal mine production system. The communication system includes two parts: wired communication and wireless communication. The wired communication is mainly composed of TSN network switches. The backbone network adopts a ring network topology, and the branch network can flexibly adopt a ring, tree, star, chain network, etc.; the wireless communication part can adopt 5G or Wi-Fi communication equipment compatible with the TSN network to jointly cover the entire coal mine production control system and meet the data communication needs of automated control.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0023] Figure 1 A schematic diagram of the structure of a coal mine communication network system based on a time-sensitive network provided by the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of coal mine equipment connected by TSN network. DETAILED DESCRIPTION

[0025] The core of the present invention is to provide a coal mine communication network system based on a time-sensitive network. By building a communication system based on a time-sensitive network, a real-time, deterministic and reliable communication network is provided for the coal mine production system to meet the data communication needs of automated control.

[0026] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a coal mine communication network system based on a time-sensitive network provided by the present invention; the coal mine communication network system based on a time-sensitive network specifically includes:

[0028] A wired communication system, wherein the backbone network of the wired communication system is composed of multiple TSN network switches connected in a ring network topology, and is used to connect coal mine equipment as a terminal to the TSN network;

[0029] The wired communication system also includes a branch network, which is composed of a plurality of TSN network switches using a ring, tree, star and chain network;

[0030] The wired communication system is connected to the coal mine information system via a TSN switch or Ethernet;

[0031] The wired communication system and the wireless communication system both adopt a communication architecture based on a time-sensitive network, and set a gated queue to reserve bandwidth for preset priority data for controlling data transmission;

[0032] The TSN network switch is a layer 2 switch, which is used to place the wired communication system and the wireless communication system to work in the same layer 2 network.

[0033] The TSN network switch supports a series of TSN protocols such as 802.1AS, 802.1Qbv, 802.1Qbu, 802.1Qcc, 802.1Qci, 802.1CB, etc.

[0034] A wireless communication system, connected to the coal mine information system, composed of wireless devices compatible with the TSN protocol, including 5G communication and Wi-Fi communication, used to connect coal mine equipment to the TSN network through wireless connection;

[0035] The wired communication system and the wireless communication system provide the same synchronization time using time-sensitive network technology;

[0036] The wired communication system is connected to the wireless communication system using a TSN network switch;

[0037] The centralized network controller is connected to the wired communication system and the wireless communication system respectively, and is used to identify different types of data streams through a dedicated protocol, and perform calculations according to the data type and network structure, set different priorities and gating queues for different types of data streams, and dynamically configure the network.

[0038] The equipment in the coal mine equipment that does not support network communication is connected to the wired communication system or the wireless communication system after conversion through the gateway.

[0039] This embodiment provides a coal mine communication network system based on a time-sensitive network, which adopts TSN switches to form a wired network and 5G or Wi-Fi to form a wireless network, which jointly cover the entire coal mine production control system. Through gate planning and configuration, it can provide deterministic low-latency services for some key data streams, and provide synchronized unified time for all devices under the coal mine network system through time-sensitive network technology. The adopted time-sensitive network technology can ensure the determinism and real-time nature of data transmission, and can also achieve better performance of end-to-end deterministic communication, and has the advantage of compatibility, and can effectively be compatible with existing Ethernet devices and IT networks.

[0040] Based on the above embodiment, this embodiment describes the coal mine communication network system based on a time-sensitive network, as follows:

[0041] The coal mine communication network system based on time-sensitive network includes two parts: wired communication and wireless communication. The wired communication is mainly composed of TSN network switches. The backbone network adopts a ring network topology, and the branch network can flexibly adopt a ring, tree, star, chain network, etc.; the wireless communication part can use 5G or Wi-Fi communication equipment compatible with TSN network. The main production and safety monitoring equipment of the coal mine (such as coal mining machines, hydraulic supports, ventilation equipment, power supply equipment, environmental monitoring, personnel positioning, etc.) are connected to the TSN network as terminals, and devices that do not support network communication (and 5G or Wi-Fi) are connected to the communication system after conversion through the gateway.

[0042] Since TSN is compatible with standard Ethernet, the communication system can be directly connected to the ground coal mine information system (IT network) through a switch (or a boundary protection device such as a firewall or gateway can be added in the middle), and Ethernet communication can also be used for seamless connection to achieve the integration of OT and IT networks.

[0043] like Figure 2 As shown, according to this network architecture, a mining basic communication network built based on TSN technology can cover all services and transmit them with one cable.

[0044] All terminal devices in coal mine production control and safety-related OT networks should use TSN terminals first. From TSN terminal to TSN terminal (all intermediate communication links are TSN switches), the best communication quality can be achieved.

[0045] The TSN switches in the OT network should preferably use layer 2 switches (the switches support a series of TSN protocols such as 802.1AS, 802.1Qbv, 802.1Qbu, 802.1Qcc, 802.1Qci, 802.1CB, etc.), so that the entire OT network works under the same layer 2 network to ensure the best TSN characteristics. The switches used as subsystem aggregation can also use layer 3 TSN switches, so that different subsystems work in different clock domains. The TSN switches connected to the IT network should preferably use layer 3 switches.

[0046] In the entire coal mine OT network, due to the use of a communication architecture based on a time-sensitive network, sufficient bandwidth can be reserved for high-priority data through gated queue settings, giving priority to ensuring the transmission of control data with high real-time requirements; thereby ensuring low latency and certainty of key data flows. It also has the ability to provide a unified timestamp for all terminals in the network, providing a basis for accurate coordination between devices and fault analysis.

[0047] Furthermore, if TSN terminals are used in the entire OT network, end-to-end deterministic data transmission and precise time synchronization (up to sub-us level) can be achieved to meet communication requirements that are more stringent than process control, such as motion control.

[0048] There is a CNC (Centralized Network Configuration) controller in the entire network system. The CNC controller is a set of software that can run on a host or server device in the system. The CNC controller can identify different types of data streams through a dedicated protocol (usually 802.1Qcc), and solve them according to the data type and network structure, setting different priorities and gating queues for different types of data streams, thereby dynamically configuring the network to ensure stable transmission of key data streams while maximizing data communication efficiency.

[0049] The coal mine communication network system based on a time-sensitive network provided by the embodiment of the present invention can use a CNC controller to identify different types of data streams through a dedicated protocol, and solve according to the data type and network structure, set different priorities and gated queues for different types of data streams, so as to realize dynamic configuration of the network, ensure stable transmission of key data streams while making data communication efficient at the highest level, adopt TSN terminals, realize end-to-end data determination transmission, and precise time synchronization (up to sub-us level) to meet communication requirements that are more stringent than process control, adopt a communication architecture based on a time-sensitive network, and reserve sufficient bandwidth for high-priority data through gated queue settings, and give priority to ensuring the transmission of control data with high real-time requirements; thereby ensuring low latency and determinism of key data streams. It also has the ability to provide a unified timestamp for all terminals in the network, providing a basis for accurate coordination between devices, fault analysis, etc.

[0050] The collection, storage, use, processing, transmission, provision and disclosure of user personal information involved in this application are in compliance with relevant laws and regulations and do not violate public order and good morals.

[0051] It should be noted that personal information from users should be collected for legitimate and reasonable purposes and should not be shared or sold outside of these legitimate uses. In addition, such collection / sharing should be carried out after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign the agreement / authorization including authorization of relevant user information before the user uses the function. In addition, any necessary steps should be taken to protect and safeguard access to such personal information data and ensure that others who have access to personal information data comply with its privacy policy and procedures.

[0052] The present application is expected to provide an implementation scheme for users to selectively block the use or access of personal information data. That is, the present disclosure is expected to provide hardware and / or software to prevent or block access to such personal information data. Once the personal information data is no longer needed, the risk can be minimized by limiting data collection and deleting the data. In addition, when applicable, such personal information is de-identified to protect the privacy of the user.

[0053] In the description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0055] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0056] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0057] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0058] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0059] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0060] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A coal mine communication network system based on a time-sensitive network, characterized in that: include: A wired communication system, wherein the backbone network of the wired communication system is composed of multiple TSN network switches connected in a ring network topology, and is used to connect coal mine equipment as a terminal to the TSN network; The wireless communication system is connected to the wired communication system and is composed of wireless communication equipment compatible with the TSN protocol, and is used to connect the coal mine equipment to the TSN network through a wireless connection.

2. The coal mine communication network system based on time-sensitive network according to claim 1, characterized in that: The wired communication system and the wireless communication system adopt a communication architecture based on a time-sensitive network, and set a gated queue to reserve bandwidth for preset priority data for controlling data transmission.

3. The coal mine communication network system based on time-sensitive network according to claim 2 is characterized in that: The wired communication system also includes a branch network, which is composed of multiple TSN network switches using ring, tree, star and chain networks.

4. The coal mine communication network system based on time-sensitive network according to claim 1, characterized in that: It also includes a centralized network controller, which is connected to the wired communication system and the wireless communication system respectively, and is used to identify different types of data streams through a dedicated protocol, and perform calculations based on the data type and network structure, set different priorities and gating queues for different types of data streams, and dynamically configure the network.

5. The coal mine communication network system based on time-sensitive network according to claim 1, characterized in that: The wired communication system and the wireless communication system provide a unified synchronization time by using a time-sensitive network technology.

6. The coal mine communication network system based on time-sensitive network according to claim 1, characterized in that: The wired communication system is connected with the coal mine information system via Ethernet.

7. The coal mine communication network system based on time-sensitive network according to claim 1, characterized in that: The wired communication system is connected to the wireless communication system using a TSN network switch.

8. The coal mine communication network system based on time-sensitive network according to claim 1, characterized in that: The equipment in the coal mine equipment that does not support network communication is connected to the wired communication system after conversion through the gateway.

9. The coal mine communication network system based on time-sensitive network according to claim 1, characterized in that: The TSN network switch is a layer 2 switch, which is used to place the wired communication system and the wireless communication system to work in the same layer 2 network.

10. The coal mine communication network system based on time-sensitive network according to claim 9, characterized in that: The TSN network switch supports 802.1AS, 802.1Qbv, 802.1Qbu, 802.1Qcc, 802.1Qci, and 802.1CB protocols.

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