Underground coal mine wireless communication method

Abstract

The invention relates to an underground coal mine wireless communication method, belongs to the field of coal mine communication, and aims to solve the standby problem of an underground coal mine mobile terminal. According to the method, signaling is transmitted by adopting a low-power-consumption ZigBee or Bluetooth technology, a media stream is transmitted by adopting a high-bandwidth Wi-Fi6 technology, SIP signaling interaction between a mining mobile terminal and a mining SIP server is carried out through a mining wireless base station, and the media stream is transparently forwarded. The system effectively solves the problems of high standby power consumption, insufficient bandwidth, complex networking and the like in the prior art, realizes low-power standby and high-bandwidth transmission, has the advantages of low cost, high compatibility, convenience in maintenance and the like, and provides reliable communication guarantee for safe production and daily management of a coal mine.

Description

Technical Field

[0001] The invention belongs to the field of coal mine communication and relates to a wireless communication method underground in a coal mine. Background Art

[0002] Wireless communication systems are an important support for coal mine safety production and daily management, and are of great significance to improving coal mine safety production levels and production efficiency. Traditional coal mine underground communications mainly rely on wired communications and narrowband wireless communications, which have the following defects:

[0003] Limited coverage: Wired communications are limited by wiring costs and construction difficulties, making it difficult to achieve full coverage underground; narrowband wireless communications have a small coverage range and are difficult to meet the needs of mobile communications underground.

[0004] Insufficient bandwidth: Traditional communication methods cannot meet the needs of underground coal mines for the transmission of large amounts of data such as voice and video, which affects the quality of communication.

[0005] High power consumption: Existing wireless communication technologies have high power consumption and cannot meet the demand for long standby time of mining mobile terminals, thus limiting their application underground.

[0006] Complex networking: Traditional communication systems have complex networking and are difficult to maintain, which is not conducive to rapid deployment and application in coal mines.

[0007] In recent years, Wi-Fi 6 technology has been used in coal mining enterprises to a certain extent because of its advantages such as low cost, easy maintenance, and high bandwidth. However, Wi-Fi 6 technology also has the problem of high standby power consumption, which makes it difficult to meet the standby time requirements of mobile terminals in coal mines. Therefore, developing a low-power, high-bandwidth wireless communication method for underground coal mines is of great significance to improving the safety level of coal mine production and improving production efficiency. Summary of the invention

[0008] In view of this, an object of the present invention is to provide a wireless communication method in an underground coal mine to solve the standby problem of a mobile terminal used in an underground coal mine.

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] A wireless communication method for underground coal mine, the method comprising the following steps:

[0011] Transmit the signaling of the mining mobile terminal to the mining wireless base station through low-power ZigBee or Bluetooth wireless communication technology;

[0012] The media stream of the mining mobile terminal is transmitted to the mining wireless base station through the high-bandwidth Wi-Fi6 wireless communication technology;

[0013] The mine-used mobile terminal interacts with the mine-used SIP server through the mine-used wireless base station agent;

[0014] The media stream of the mining mobile terminal is transparently forwarded through the mining wireless base station.

[0015] Furthermore, the ZigBee or Bluetooth module of the mining mobile terminal is always in a low-power state, and the Wi-Fi6 module is in a closed state before the media stream is established. When the media stream is established, it actively connects to the mining wireless base station and enables a fixed IP address.

[0016] Furthermore, the mining wireless base station adopts a multi-port network switch, supports optical and electrical port networking, and the main processor has Wi-Fi6, ZigBee or Bluetooth access functions.

[0017] Furthermore, the mining mobile terminal adopts an ultra-low power consumption processor and has Wi-Fi6, ZigBee or Bluetooth wireless access functions, as well as voice collection and playback functions.

[0018] A wireless communication system for underground coal mines, the system comprising:

[0019] Mine SIP server, used to process SIP signaling and media stream negotiation;

[0020] Switch, used to connect the mine wireless base station and the mine SIP server;

[0021] Mine wireless base station, used to receive signaling and media streams from mine mobile terminals and forward them to mine SIP servers;

[0022] The mining mobile terminal is used to send signaling and media streams, and receive signaling and media streams from the mining SIP server.

[0023] Furthermore, the mining SIP server supports the standard SIP3261 protocol and supports the media formats of G711a, G711u, G729ab, G723, H263 or H264.

[0024] Furthermore, the mining wireless base station supports optical and electrical port networking, and has Wi-Fi6, ZigBee or Bluetooth access functions.

[0025] Furthermore, the mining mobile terminal adopts an ultra-low power consumption processor and has Wi-Fi6, ZigBee or Bluetooth wireless access function, as well as voice collection and playback functions.

[0026] The wireless communication method for underground coal mines provided by the present invention adopts low-power ZigBee or Bluetooth technology to transmit signaling and high-bandwidth Wi-Fi6 technology to transmit media streams, which effectively solves the defects of the prior art and has the following beneficial effects:

[0027] (1) ZigBee or Bluetooth technology has low power consumption, and the Wi-Fi6 module is turned off when there is no media stream, which effectively extends the standby time of mining mobile terminals and meets the needs of long-term work underground in coal mines.

[0028] (2) Wi-Fi 6 technology has a high bandwidth, which ensures the real-time transmission of media streams such as voice and video, and meets the needs of underground coal mines for high-definition audio and video communications.

[0029] (3) The system supports multiple interfaces such as optical port, electrical port, Wi-Fi6, ZigBee or Bluetooth, and can be flexibly networked according to the actual situation underground in coal mines, facilitating deployment and application.

[0030] (4) The system adopts standard SIP and RTP protocols, is compatible with existing wireless communication systems, and is easy to integrate with other systems.

[0031] (5) ZigBee or Bluetooth modules have low costs, and the overall system cost is low, which is conducive to promotion and application in coal mining enterprises.

[0032] (6) The system has a simple structure and is easy to maintain, thus reducing operation and maintenance costs.

[0033] The present invention realizes low-power standby and high-bandwidth transmission of wireless communication in coal mines by combining low-power and high-bandwidth technologies, effectively solves the shortcomings of the existing technology, and provides reliable communication guarantee for safe production and daily management of coal mines.

[0034] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0036] Figure 1 It is the system network topology diagram;

[0037] Figure 2 Schematic diagram of the hardware design of the wireless base station for mining;

[0038] Figure 3Design schematic diagram for mining mobile terminal hardware;

[0039] Figure 4 Design a schematic diagram for SIP registration proxy;

[0040] Figure 5 Design schematic diagram for active call agent of mining mobile terminal;

[0041] Figure 6 Design diagram for SIP active call proxy. DETAILED DESCRIPTION

[0042] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0043] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0044] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0045] The invention patent discloses a wireless communication method for underground coal mines. The technical patent integrates low-power wireless communication technology and high-bandwidth wireless communication technology to propose a wireless communication method for underground coal mines, which mainly solves the problems of wireless communication and standby of mine mobile terminals in underground coal mines.

[0046] The method includes three parts: a standard mining SIP server, a mining switch, a mining wireless base station, and a mining mobile terminal.

[0047] This method uses low-power ZigBee or Bluetooth wireless communication technology, mainly to complete the signaling processing of mining mobile terminals, including control instructions such as network access, registration, calling, media negotiation, etc., to increase the standby time of traditional Wi-Fi6 wireless mobile terminals from 1 day to 1 week.

[0048] This method uses high-bandwidth Wi-Fi6 wireless communication technology, mainly to complete the sending and receiving of media streams of mining mobile terminals, realize the interaction of voice and video, and ensure the real-time nature of the media streams.

[0049] This method uses the standard SIP protocol and acts as a proxy through a mine wireless base station.

[0050] This method uses the standard RTP protocol and transparently forwards data through a mine wireless base station.

[0051] The technical design of the invention has the following advantages: signaling and media streams are transmitted through different wireless technologies, which ensures the standby time of the mining mobile terminal while ensuring the fluency of the media stream. The method adopts the standard SIP protocol and RTP protocol and is compatible with the current wireless communication system.

[0052] System composition:

[0053] This invention patent is mainly composed of standard mining SIP servers, switches, mining wireless base stations, mining mobile terminals, etc.

[0054] Detailed design:

[0055] 1. System network topology design

[0056] The system uses standard mining SIP servers and industrial Ethernet to deploy mining wireless base stations and mining mobile terminals underground, and realizes voice and video communications through soft switching. Figure 1 It is a topology diagram of the wireless communication system.

[0057] 2. Design of SIP server for mining

[0058] In order to be compatible with the communication system underground in coal mines, the mining SIP server adopts the standard SIP3261 design, supports signaling such as REGISTER, INVITE, ACK, OPTIONS, BYE and CANCEL, and supports commonly used media such as G711a, G711u, G729ab, G723, H263, H264, etc.

[0059] 3. Hardware design of mine wireless base station

[0060] The mining wireless base station hardware supports optical and electrical networking, and a multi-port network switch is designed to support three optical and three electrical ports. The main processor has Wi-Fi6, ZigBee or Bluetooth access functions. Figure 2 Schematic diagram of the hardware design of the wireless base station for mining.

[0061] 4. Hardware design of mining mobile terminal

[0062] The mining mobile terminal uses an ultra-low power processor, has Wi-Fi6, ZigBee or Bluetooth wireless access function, and has voice collection and voice playback functions. Figure 3 Schematic diagram of the hardware design of the mining mobile terminal.

[0063] 5. IP address and device working status design

[0064] ZigBee or Bluetooth does not have an IP address and communicates with the base station through a private protocol. The ZigBee or Bluetooth module of the mining mobile terminal is always in a low power consumption state.

[0065] Before the media stream is established, the Wi-Fi6 of the mining mobile terminal is always in the closed state to ensure that the entire mining mobile terminal works with ultra-low power consumption. When the media stream is established, the Wi-Fi6 module of the mining mobile terminal actively connects to the mining wireless base station and activates the fixed IP address allocated in advance.

[0066] The ZigBee or Bluetooth of the mine wireless base station is always activated to ensure that the ZigBee or Bluetooth of the mine mobile terminal can be accessed at any time.

[0067] The Wi-Fi6 module of the mine wireless base station is in an activated state, waiting for the Wi-Fi6 wireless access of the mine mobile terminal.

[0068] The Wi-Fi6 module of the mine wireless base station and the network switch share a fixed IP address, which facilitates TCP / IP communication with the mine SIP server.

[0069] 6. Design of registration agent for mining mobile terminal

[0070] The mining mobile terminal maintains a connection with the mining wireless base station through ZigBee or Bluetooth, and periodically transmits the registration parameters such as the number and IP address of the mining mobile terminal to the mining wireless base station. When the mining wireless base station determines that there is a new access or periodic registration of the mining mobile terminal, a virtual SIP client is created on the mining wireless base station to implement standard SIP protocol registration. When the mining mobile terminal roams to other mining wireless base stations, the above process is repeated to ensure that the mining SIP server can find the corresponding base station through IP routing, and then find the corresponding mining mobile terminal. Figure 4Design a schematic diagram for the SIP registration proxy.

[0071] 7. Design of active call agent for mining mobile terminal

[0072] The mining mobile terminal actively calls other numbers through ZigBee or Bluetooth, and actively sends the call information to the mining wireless base station. The mining wireless base station constructs the INVITE call information through the virtual SIP client, actively sends it to the mining SIP server, and the mining SIP server judges the call information and then calls the corresponding mining wireless base station. Figure 5 Schematic diagram of active call agent design for mining mobile terminals.

[0073] 8. Design of passive call agent for mining mobile terminal

[0074] The mining SIP server calls the mining mobile terminal through the mining wireless base station. The mining mobile terminal turns on Wi-Fi6 to connect to the mining wireless base station, and sends media stream information to the other party at the same time, and establishes a media stream with the other party through Wi-Fi6's TCP / IP. Figure 6 Design diagram for SIP active call proxy.

[0075] 9. Design of media stream forwarding for mining mobile terminals

[0076] Each mining mobile terminal has a unique IP address. Before the media stream is coordinated successfully, Wi-Fi6 is not started, connected, or effective. After the media stream is coordinated successfully, Wi-Fi6 starts to access the designated mining wireless base station, and the IP address takes effect. The media stream is sent and received at the effective IP address, and the mining wireless base station only performs transparent forwarding of wired and wireless media streams.

[0077] Example 1

[0078] like Figure 1 As shown, the coal mine underground wireless communication system provided by the present invention includes a mine-used SIP server, a switch, a mine-used wireless base station and a mine-used mobile terminal.

[0079] Mine SIP server: adopts the standard SIP3261 protocol, supports REGISTER, INVITE, ACK, OPTIONS, BYE and CANCEL signaling, and supports commonly used media formats such as G711a, G711u, G729ab, G723, H263, H264, etc. The mine SIP server is responsible for processing SIP signaling and media stream negotiation, and provides functions such as user registration, call control, and media negotiation.

[0080] Switch: used to connect mine wireless base stations and mine SIP servers, supporting optical and electrical port networking. The switch is responsible for data exchange and routing, ensuring efficient transmission of signaling and media streams within the system.

[0081] Mine wireless base station: supports optical and electrical port networking, and has Wi-Fi6, ZigBee or Bluetooth access functions. The main processor is responsible for receiving the signaling and media streams of the mine mobile terminal and forwarding them to the mine SIP server. At the same time, the mine wireless base station 3 is also responsible for transparently forwarding the media streams of the mine mobile terminal. The mine wireless base station can be flexibly deployed according to the actual situation of the coal mine underground to achieve full coverage underground.

[0082] Mining mobile terminal: It uses an ultra-low power processor and has Wi-Fi6, ZigBee or Bluetooth wireless access functions, as well as voice collection and playback functions. The mining mobile terminal maintains a connection with the mining wireless base station through the ZigBee or Bluetooth module for signaling; when a voice or video call is required, the mining mobile terminal establishes a connection with the mining wireless base station through the Wi-Fi6 module and enables a fixed IP address for media stream transmission. The mining mobile terminal is lightweight and easy for miners to carry. It has waterproof, dustproof, explosion-proof and other functions to adapt to the harsh environment of coal mines.

[0083] Example 2

[0084] The present invention can also adopt other types of low-power wireless communication technologies, such as Z-wave, Thread, etc., and other types of high-bandwidth wireless communication technologies, such as 5G, Li-Fi, etc. For example, Z-wave technology can be used for signaling transmission of mining mobile terminals, and 5G technology can be used for media streaming transmission, further improving the performance and reliability of the system.

[0085] Example 3

[0086] The present invention can also be applied to other fields, such as mine rescue, mine inspection, etc., to provide reliable communication guarantee for related applications. For example, the present invention can be applied to a mine rescue system to provide rescuers with voice, video, positioning and other information, thereby improving rescue efficiency and success rate.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A wireless communication method for underground coal mines, characterized in that: The method comprises the following steps: Transmit the signaling of the mining mobile terminal to the mining wireless base station through low-power ZigBee or Bluetooth wireless communication technology; The media stream of the mining mobile terminal is transmitted to the mining wireless base station through the high-bandwidth Wi-Fi6 wireless communication technology; The mine-used mobile terminal interacts with the mine-used SIP server through the mine-used wireless base station agent; The media stream of the mining mobile terminal is transparently forwarded through the mining wireless base station.

2. A wireless communication method for underground coal mine according to claim 1, characterized in that: The ZigBee or Bluetooth module of the mining mobile terminal is always in a low-power state, and the Wi-Fi6 module is in a closed state before the media stream is established. When the media stream is established, it actively connects to the mining wireless base station and enables a fixed IP address.

3. A wireless communication method for underground coal mine according to claim 1, characterized in that: The mine wireless base station adopts a multi-port network switch, supports optical and electrical port networking, and the main processor has Wi-Fi6, ZigBee or Bluetooth access functions.

4. A wireless communication method for underground coal mine according to claim 1, characterized in that: The mining mobile terminal adopts an ultra-low power processor and has Wi-Fi6, ZigBee or Bluetooth wireless access functions, as well as voice collection and playback functions.

5. A wireless communication system for underground coal mines, characterized in that: The system includes: Mine SIP server, used to process SIP signaling and media stream negotiation; Switch, used to connect the mine wireless base station and the mine SIP server; Mine wireless base station, used to receive signaling and media streams from mine mobile terminals and forward them to mine SIP servers; The mining mobile terminal is used to send signaling and media streams, and receive signaling and media streams from the mining SIP server.

6. The wireless communication system for underground coal mines according to claim 5, characterized in that: The mining SIP server supports the standard SIP3261 protocol and supports the media formats of G711a, G711u, G729ab, G723, H263 or H264.

7. The wireless communication system for underground coal mines according to claim 5, characterized in that: The mine wireless base station supports optical and electrical port networking, and has Wi-Fi6, ZigBee or Bluetooth access functions.

8. The wireless communication system for underground coal mines according to claim 5, characterized in that: The mining mobile terminal adopts an ultra-low power consumption processor and has Wi-Fi6, ZigBee or Bluetooth wireless access functions, as well as voice collection and playback functions.

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