Mesh group intercom method, system and device for mine

Abstract

The embodiment of the application discloses a mine MESH group intercom method, system and device. The scheme detects a plurality of MESH relay stations around the mine, and selects a target MESH relay station meeting a registration condition from the plurality of MESH relay stations to register in the network to join an intercom group; during movement in the mine, according to communication quality information of the target MESH relay station and surrounding MESH relay stations, the target MESH relay station is automatically switched to a new MESH relay station to register in the network; in response to an intercom event, voice data corresponding to the intercom event is acquired, and the voice data is sent to the currently registered MESH relay station, so that the currently registered MESH relay station transmits the voice data to other communication intercoms and other MESH relay stations, wherein the other communication intercoms are intercoms registered in the network in the currently registered MESH relay station, and wide-range group intercom in the mine environment is realized.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a method, system and device for MESH group intercom in a mine. Background Technology

[0002] In the mine environment, due to the narrow and winding tunnels, dense metal components, and numerous fire doors and metal shielding structures, wireless signals are easily blocked and severely attenuated, resulting in a complex and harsh communication environment.

[0003] In related technologies, the main communication method in mines is the traditional walkie-talkie. Traditional walkie-talkies can only communicate point-to-point over short distances, are greatly affected by obstructions, have a small coverage area, and cannot achieve large-scale group communication.

[0004] Therefore, existing technologies have shortcomings such as limited coverage and difficulty in achieving mine-wide group intercom, which cannot meet the communication needs of daily mine scheduling and emergency rescue. Summary of the Invention

[0005] The purpose of this application is to propose a MESH group intercom method for mines, which aims to solve the problem that large-scale group intercom cannot be realized in the mine environment.

[0006] This application provides a MESH group intercom method for mines, applied to walkie-talkies, the method comprising: The system detects multiple MESH relay stations around the mine and selects a target MESH relay station that meets the registration requirements to register and join the intercom group. During movement within the mine, based on the communication quality information of the target MESH relay station and surrounding MESH relay stations, it automatically switches to a new MESH relay station for network registration. In response to an intercom event, the system acquires the corresponding voice data and sends the voice data to the currently registered MESH relay station, so that the currently registered MESH relay station can transmit voice data to other communication intercoms and other MESH relay stations. The other communication intercoms are intercoms that have registered with the currently registered MESH relay station. This involves monitoring multiple mesh relay stations around the mine and selecting a target mesh relay station that meets the registration requirements for network registration, including: Scan the wireless signals transmitted by surrounding MESH relay stations and collect communication quality information, operation status information, and historical connection information of each MESH relay station; Based on communication quality information, operational status information, and historical connection information, candidate MESH relay stations that are online and meet the signal quality standards are selected from multiple MESH relay stations. Each candidate MESH relay station is weighted and scored, and the candidate MESH relay station with the highest score is selected as the target MESH relay station. After pre-connection verification with the target MESH relay station, complete security authentication and registration, synchronize group configuration, and join the intercom group.

[0007] Accordingly, this application also provides a mesh group intercom method for mines, applied to a mesh relay station, the mesh relay station including: a short-range wireless module and a long-range wireless module, the method including: The system receives network registration requests from walkie-talkies via a short-range wireless module, verifies the identity of the walkie-talkie based on the network registration request, and registers the walkie-talkie's network access information. The system receives registration and handover requests from walkie-talkies via a short-range wireless module and completes the MESH relay station registration and handover of the walkie-talkies based on these requests. The system receives voice data sent by registered walkie-talkies via a short-range wireless module and transmits voice data to other walkie-talkies, which are walkie-talkies that have registered with the MESH relay station. It establishes communication connections with other MESH relay stations through a long-range wireless module and transmits voice data to other MESH relay stations.

[0008] Accordingly, this application also provides a MESH group intercom system for mines, which includes multiple MESH relay stations deployed at fixed locations in the mine, and multiple intercoms that move underground in the mine. MESH relay stations are used to receive network registration requests sent by walkie-talkies, and to complete walkie-talkie identity verification and register walkie-talkie network information based on the network registration requests. Receive the registration and handover request sent by the walkie-talkie, and complete the MESH relay station registration and handover of the walkie-talkie based on the registration and handover request; It receives voice data sent by registered walkie-talkies and transmits voice data to other walkie-talkies. Establish communication connections with other MESH relay stations and transmit voice data to other MESH relay stations; The walkie-talkie is used to detect multiple MESH relay stations around the mine and select a target MESH relay station that meets the registration requirements to join the network and register in order to join the walkie-talkie group. During movement within the mine, based on the communication quality information of the target MESH relay station and surrounding MESH relay stations, it automatically switches to a new MESH relay station for network registration. In response to an intercom event, acquire the corresponding voice data and send the voice data to the currently registered MESH relay station; This involves monitoring multiple mesh relay stations around the mine and selecting a target mesh relay station that meets the registration requirements for network registration, including: Scan the wireless signals transmitted by surrounding MESH relay stations and collect communication quality information, operation status information, and historical connection information of each MESH relay station; Based on communication quality information, operational status information, and historical connection information, candidate MESH relay stations that are online and meet the signal quality standards are selected from multiple MESH relay stations. Each candidate MESH relay station is weighted and scored, and the candidate MESH relay station with the highest score is selected as the target MESH relay station. After pre-connection verification with the target MESH relay station, complete security authentication and registration, synchronize group configuration, and join the intercom group.

[0009] Accordingly, this application also provides a mine mesh group intercom device, applied to walkie-talkies, the device comprising: The detection unit is used to detect multiple MESH relay stations around the mine and select a target MESH relay station that meets the registration conditions from among the multiple MESH relay stations for network registration in order to join the intercom group; The switching unit is used to automatically switch to a new MESH relay station for network registration during movement within the mine, based on the communication quality information of the target MESH relay station and surrounding MESH relay stations. The transmitting unit is used to respond to an intercom event, acquire the voice data corresponding to the intercom event, and send the voice data to the currently registered MESH relay station, so that the currently registered MESH relay station can transmit voice data to other communication intercoms and other MESH relay stations, wherein the other communication intercoms are intercoms that have registered with the currently registered MESH relay station. This involves monitoring multiple mesh relay stations around the mine and selecting a target mesh relay station that meets the registration requirements for network registration, including: Scan the wireless signals transmitted by surrounding MESH relay stations and collect communication quality information, operation status information, and historical connection information of each MESH relay station; Based on communication quality information, operational status information, and historical connection information, candidate MESH relay stations that are online and meet the signal quality standards are selected from multiple MESH relay stations. Each candidate MESH relay station is weighted and scored, and the candidate MESH relay station with the highest score is selected as the target MESH relay station. After pre-connection verification with the target MESH relay station, complete security authentication and registration, synchronize group configuration, and join the intercom group.

[0010] Accordingly, this application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the program to implement the above-described MESH group intercom method for mines.

[0011] Accordingly, this application also provides a computer-readable storage medium storing a plurality of instructions adapted for loading by a processor to execute the above-described mine MESH group intercom method.

[0012] This application detects multiple MESH relay stations around the mine and selects a target MESH relay station that meets the registration requirements to join the intercom group. During movement within the mine, based on the communication quality information of the target MESH relay station and surrounding MESH relay stations, it automatically switches to a new MESH relay station for network registration. In response to an intercom event, it acquires the corresponding voice data and sends the voice data to the currently registered MESH relay station, enabling the currently registered MESH relay station to transmit voice data to other intercoms and other MESH relay stations. These other intercoms are those that have registered with the currently registered MESH relay station. This ensures the continuity and reliability of large-scale group intercoms, adapting to the intercom needs of full mine coverage, thus realizing large-scale group intercoms in a mine environment. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] in: Figure 1 This is a schematic diagram of a MESH group intercom system in a mine, provided as an embodiment of the present invention.

[0015] Figure 2 This is a flowchart illustrating a MESH group intercom method for a mine, provided as an embodiment of this application.

[0016] Figure 3 This is a timing diagram of multi-station pre-registration fast roaming in a MESH group intercom method for a mine, provided in an embodiment of this application.

[0017] Figure 4This is a state transition diagram for switching between voice silence periods in a MESH group intercom method for a mine, provided in an embodiment of this application.

[0018] Figure 5 A flowchart illustrating another method for MESH group intercom in a mine, provided as an embodiment of this application.

[0019] Figure 6 This is a schematic diagram illustrating an application scenario of a MESH group intercom method in a mine, as provided in an embodiment of this application.

[0020] Figure 7 This is a structural block diagram of a MESH relay station provided in an embodiment of this application.

[0021] Figure 8 This is a schematic diagram illustrating an application scenario of another MESH group intercom method for mines provided in this application embodiment.

[0022] Figure 9 This is a structural block diagram of a mine MESH group intercom device provided in an embodiment of this application.

[0023] Figure 10 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] This application provides a method, apparatus, computer-readable storage medium, and electronic device for MESH group intercom in a mine. Specifically, the MESH group intercom method in this application can be executed by an electronic device, which can be a terminal or a server. The server can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, and big data and artificial intelligence platforms.

[0026] Based on the above problems, this application provides a method, system and device for MESH group intercom in a mine, which can ensure the continuity and reliability of large-scale group intercom, adapt to the intercom needs of full coverage in the mine, and thus realize large-scale group intercom in the mine environment.

[0027] The following sections provide detailed descriptions of each example. It should be noted that the order in which the embodiments are described is not intended to limit the preferred order of the embodiments.

[0028] This application provides a MESH group intercom system for a mine, which includes multiple MESH relay stations deployed at fixed locations in the mine, and multiple intercoms that move underground in the mine. Among them, the MESH relay station is used to receive the network registration request sent by the walkie-talkie, and complete the identity verification of the walkie-talkie and register the network registration information of the walkie-talkie based on the network registration request; Receive the registration and handover request sent by the walkie-talkie, and complete the MESH relay station registration and handover of the walkie-talkie based on the registration and handover request; It receives voice data sent by registered walkie-talkies and transmits voice data to other walkie-talkies. Establish communication connections with other MESH relay stations and transmit voice data to other MESH relay stations; Among them, the walkie-talkie is used to detect multiple MESH relay stations around the mine and select a target MESH relay station that meets the registration conditions from multiple MESH relay stations to register for network access and join the walkie-talkie group; During movement within the mine, based on the communication quality information of the target MESH relay station and surrounding MESH relay stations, it automatically switches to a new MESH relay station for network registration. In response to an intercom event, acquire the corresponding voice data and send the voice data to the currently registered MESH relay station.

[0029] For example, please see Figure 1 , Figure 1 This is a schematic diagram of a MESH group intercom system in a mine, provided as an embodiment of the present invention.

[0030] exist Figure 1 The MESH group intercom system shown in the diagram includes multiple MESH relay stations deployed at fixed locations within the mine, as well as multiple intercoms that move within the mine.

[0031] The multiple MESH relay stations may include: MESH relay station 1, MESH relay station 2, MESH relay station 3, MESH relay station n; the multiple walkie-talkies may include: walkie-talkie 11, walkie-talkie 12, walkie-talkie 1n, walkie-talkie 21, walkie-talkie 2n, walkie-talkie 31, walkie-talkie 3n, walkie-talkie n1, walkie-talkie nn.

[0032] Specifically, each MESH relay station can be used to receive network registration requests sent by walkie-talkies, complete walkie-talkie identity verification and register walkie-talkie network information based on the network registration requests; receive registration switch requests sent by walkie-talkies, complete MESH relay station registration switch for walkie-talkies based on the registration switch requests; receive voice data sent by registered walkie-talkies and transmit voice data to other communication walkie-talkies; establish communication connections with other MESH relay stations and transmit voice data to other MESH relay stations.

[0033] Specifically, each walkie-talkie can detect multiple MESH relay stations around the mine and select a target MESH relay station that meets the registration requirements to join the network and register. When moving within the mine, it automatically switches to a new MESH relay station for network registration based on the communication quality information of the target MESH relay station and surrounding MESH relay stations. In response to a walkie-talkie event, it acquires the corresponding voice data and sends the voice data to the currently registered MESH relay station.

[0034] For example, walkie-talkies 11, 12, and 1n can be within the communication range covered by MESH relay station 1. Then, MESH relay station 1 can interact with walkie-talkies 11, 12, and 1n in the MESH group intercom system of the mine.

[0035] MESH relay station 1 can be used to receive network registration requests sent by walkie-talkie 11, walkie-talkie 12, or walkie-talkie 1n; complete walkie-talkie identity verification and register network information of walkie-talkie 11, walkie-talkie 12, or walkie-talkie 1n based on the network registration requests; receive registration switching requests sent by walkie-talkie 11, walkie-talkie 12, or walkie-talkie 1n; complete MESH relay station registration switching of walkie-talkie 11, walkie-talkie 12, or walkie-talkie 1n based on the registration switching requests; receive voice data sent by walkie-talkie 11, walkie-talkie 12, or walkie-talkie 1n after registration is completed; and transmit voice data to other communication walkie-talkies. Walkie-talkies 11, 12, or 1n can be used to detect multiple MESH relay stations around the mine and select a target MESH relay station (such as MESH relay station 1) that meets the registration conditions to join the network and register. When moving within the mine, the device automatically switches to a new MESH relay station for network registration based on the communication quality information of the target MESH relay station and surrounding MESH relay stations. In response to a talkback event, the device acquires the voice data corresponding to the talkback event and sends the voice data to the currently registered MESH relay station.

[0036] MESH relay station 1 can establish communication connections with other MESH relay stations (such as MESH relay station 2) and transmit voice data to other MESH relay stations.

[0037] Other MESH repeaters and walkie-talkies also connect and communicate using the same method, which will not be listed here.

[0038] For further details, please refer to Figure 2 , Figure 2 This is a flowchart illustrating a mesh group intercom method for a mine, provided as an embodiment of this application. Taking the application of this mesh group intercom method to walkie-talkies as an example, the specific process is as follows: 101. Detect multiple MESH relay stations around the mine, and select the target MESH relay station that meets the registration conditions from among the multiple MESH relay stations to register for network access in order to join the intercom group.

[0039] In this embodiment of the application, the MESH relay station is a walkie-talkie relay device deployed in the mine. Multiple MESH relay stations are deployed in the mine, and each MESH relay station is deployed in a different fixed location in the mine.

[0040] In some embodiments, the step "detecting multiple MESH relay stations around the mine and selecting a target MESH relay station that meets the registration conditions from the multiple MESH relay stations for network registration" may include the following operations: Scan the wireless signals transmitted by surrounding MESH relay stations and collect communication quality information, operation status information, and historical connection information of each MESH relay station; Based on communication quality information, operational status information, and historical connection information, candidate MESH relay stations that are online and meet the signal quality standards are selected from multiple MESH relay stations. Each candidate MESH relay station is weighted and scored, and the candidate MESH relay station with the highest score is selected as the target MESH relay station. After pre-connection verification with the target MESH relay station, complete security authentication and registration, synchronize group configuration, and join the intercom group.

[0041] The walkie-talkie's built-in short-range wireless communication module (such as Wi-Fi) can periodically or actively scan all wireless channels within its operating frequency band, either during downtime or when idle. MESH relay stations send beacon frames containing information such as their own ID, network name, and synchronization time at fixed time intervals (e.g., every 100 milliseconds). The walkie-talkie can detect which MESH relay stations are present in the vicinity by receiving these beacons.

[0042] In some embodiments, communication quality information may include signal strength (RSSI), signal-to-noise ratio (SNR), and link quality (LQ); operational status information may include the working status of the MESH relay station, such as online / offline status, load rate, etc.; historical connection information may include the historical connection success rate of the MESH relay station, which may be local cached historical data of the MESH relay station.

[0043] Among them, load rate refers to the "resource ratio" currently occupied by the MESH relay station. The higher the value, the busier, more congested, and the more strained the relay station's forwarding capacity. Link quality refers to the comprehensive transmission performance index of the wireless communication link between the MESH relay station and the walkie-talkie. It is used to characterize the link's ability to stably transmit walkie-talkie voice data. The higher the value, the more reliable the link and the clearer and more stable the walkie-talkie. Historical connection success rate is the percentage of times the MESH relay station successfully completes the walkie-talkie's network registration, roaming handover, or maintains stable communication within a preset historical period, out of the corresponding total number of connection attempts.

[0044] In some embodiments, candidate MESH relay stations that are online and meet the signal quality standards are selected from multiple MESH relay stations based on communication quality information, operating status information, and historical connection information. Specifically, this may include: selecting candidate MESH relay stations from multiple MESH relay stations whose signal strength, signal-to-noise ratio, link quality, operating status, and historical connection success rate meet the preset registration conditions according to preset registration conditions.

[0045] The preset registration conditions may include the following: Signal strength ≥ preset signal strength threshold (e.g., RSSI ≥ -85dBm); Signal-to-noise ratio ≥ preset signal-to-noise ratio threshold (e.g., SNR ≥ 15dB); Link quality ≥ preset quality value (e.g., LQ ≥ 60, supports normal intercom); The user is currently online.

[0046] For example, based on the signal strength, signal-to-noise ratio, link quality, and working status of each MESH relay station, MESH relay stations with signal strength ≥ preset signal strength threshold, signal-to-noise ratio ≥ preset signal-to-noise ratio threshold, link quality ≥ preset quality value, and working status of being online are selected from multiple MESH relay stations as candidate MESH relay stations.

[0047] Furthermore, for the shortlisted candidate MESH relay stations, the comprehensive score is calculated using the following weighted calculation formula: Total score = W1 RSSI+W2 SNR+W3 (1 (load rate) + W4 Historical connection success rate; Wherein, W1, W2, W3, and W4 can be preset weighting coefficients, with values ​​ranging from 0 to 1, and the sum of W1, W2, W3, and W4 is 1; (1 Load factor indicates the idle rate of the MESH relay station; historical connection success rate is taken as 0 to 1. In some embodiments, the preset weight coefficients can also be dynamically adjusted according to different areas of the mine (open roadways / shielded areas). For example, the weight coefficient corresponding to the historical success rate can be appropriately increased in the shielded area.

[0048] By using the weighted calculation formula above, MESH relay stations with high comprehensive capabilities in signal quality, network load, and historical stability can be selected, avoiding the problem of poor subsequent communication quality caused by weak but stable signals or strong signals but high load.

[0049] In some embodiments, the walkie-talkie also listens to load broadcast information broadcast by surrounding MESH relay stations. When selecting a target MESH relay station that meets the registration conditions from multiple MESH relay stations, the current load rate of each MESH relay station is used as an indicator for weighted scoring, and MESH relay stations with load rates lower than a preset load threshold are selected first.

[0050] Specifically, load rate represents the proportion of walkie-talkies currently served by a MESH relay station relative to its maximum capacity, or its wireless resource utilization rate. Each relay station periodically broadcasts its own load rate information via beacon frames, which walkie-talkies scan and receive, using this information as a selection criterion. The aforementioned weighted scoring formula already includes a (1-load rate) term to reflect idle time. This embodiment further utilizes this load rate information to set a preset load threshold for filtering overloaded relay stations; for example, relay stations with a load rate exceeding 80% are no longer considered as candidate stations. During initial network registration, walkie-talkies prioritize relay stations with lower load rates to balance network load and avoid increased voice latency or packet loss due to overload of individual relay stations.

[0051] By incorporating the real-time load of relay stations into the station selection decision, communication congestion caused by multiple walkie-talkies simultaneously clustering under the same relay station is effectively avoided. Especially during peak personnel periods such as shift changes in mines and emergency rescue operations, this mechanism can automatically guide some walkie-talkies to adjacent relay stations with lighter loads, improving the resource utilization and walkie-talkie service quality of the entire MESH network.

[0052] In some embodiments, after selecting the relay station with the highest comprehensive score from the candidate relay stations as the target MESH relay station, to avoid inflated scores or temporary interference, the walkie-talkie can initiate a pre-connection verification. Specifically, a probe frame is sent to the target MESH relay station to verify bidirectional communication connectivity, absence of severe interference, and end-to-end latency ≤ a preset latency threshold (e.g., 50ms). If the verification passes, the target MESH relay station is locked as the current access node; if the verification fails, it is automatically deferred to the next highest-scoring candidate relay station, and the verification is repeated until successful.

[0053] After successful pre-verification, the walkie-talkie can initiate a secure registration request to the target MESH relay station. The request message includes the walkie-talkie's unique ID, group information, and pre-shared authentication key. Upon receiving the request, the MESH relay station completes identity verification, group permission matching, and resource allocation. After successful verification, it returns a registration success response and allocates local communication time slots / channel resources. Upon receiving the response, the walkie-talkie synchronizes the network-wide group list, roaming trigger parameters, channel configuration, and network topology information issued by the relay station, officially joining the walkie-talkie group and establishing a two-way voice transmission link, supporting real-time group intercom.

[0054] 102. During movement within the mine, based on the communication quality information of the target MESH relay station and surrounding MESH relay stations, automatically switch to the new MESH relay station for network registration.

[0055] After a walkie-talkie is successfully registered with the target MESH relay station, when a user (such as an underground worker) moves around the mine with the walkie-talkie, the communication quality information of the target MESH relay station and surrounding MESH relay stations can be detected in real time. This allows for switching and registration of MESH relay stations based on the detection results, ensuring the communication quality between the walkie-talkie and the walkie-talkie group.

[0056] In some embodiments, the step "automatically switch to a new MESH relay station for network registration based on the communication quality information of the target MESH relay station and surrounding MESH relay stations" may include the following operations: During the movement, the communication quality information of the target MESH relay station and surrounding MESH relay stations is monitored in real time. Based on communication quality information, the first candidate MESH relay station with a score higher than the preset score threshold is selected from the surrounding MESH relay stations, and the first candidate MESH relay station is pre-scanned and pre-registered. When the signal strength of the target MESH relay station is lower than the preset signal strength threshold, the first candidate MESH relay station with the highest signal strength is selected for network registration. After registration is completed, the connection with the target MESH relay station is disconnected.

[0057] When underground personnel move through the mine tunnels with walkie-talkies, the walkie-talkies maintain continuous communication while automatically executing a roaming process of "real-time monitoring - optimal pre-registration - trigger switching - smooth migration" to ensure uninterrupted voice communication and no exit from group conversations.

[0058] During the movement, the communication quality information of the target MESH relay station and surrounding MESH relay stations is monitored in real time, which may specifically include the following implementation methods: When the walkie-talkie is in normal registration and communication state, it periodically (e.g., every 200ms) scans the currently connected target MESH relay station and all adjacent MESH relay stations within the surrounding coverage area, and synchronously collects and updates the communication quality information of each relay station, including parameters such as: signal strength RSSI, signal-to-noise ratio SNR, link quality LQ, relay station load rate, and historical connection success rate.

[0059] In some embodiments, the walkie-talkie also acquires its own motion state information and estimates the walking speed of the walkie-talkie based on the motion state information; when the walking speed exceeds a preset speed threshold, the weight of the signal strength change rate in the weighted score is increased, and the preset threshold of the signal strength that triggers the switching is increased accordingly.

[0060] Motion status information can be obtained through the walkie-talkie's built-in accelerometer, gyroscope, or by estimating the Doppler frequency shift of the MESH relay station signal. A preset speed threshold can be set according to actual mine conditions; for example, if personnel walk briskly or ride in a mine cart at a speed exceeding the set value, it indicates rapid movement. The signal strength change rate refers to the amount of change in signal strength per unit time; signal attenuation is faster during rapid movement. Increasing the weight of this change rate in the weighted scoring formula means that relay station signal stability becomes a more important criterion for station selection. Simultaneously, increasing the signal strength threshold that triggers handover, for example from -85dBm to -80dBm, allows the walkie-talkie to initiate the handover process before the signal becomes very weak. When the speed exceeds the threshold, the walkie-talkie dynamically adjusts the weighting coefficients in the scoring formula and switches the trigger threshold, thereby avoiding delayed handover or call interruption due to a sudden drop in signal strength.

[0061] By using movement speed as an adaptive adjustment factor for handover decisions, the problem of delayed response in traditional fixed-threshold handover during high-speed movement is solved. By increasing the weight of signal change rate and advancing the handover threshold, it ensures that the walkie-talkie can switch to a better repeater station in a timely manner when the signal is rapidly attenuating, effectively avoiding voice interruptions or dropped calls.

[0062] For example, the walkie-talkie is currently registered at relay station A in the main roadway, and personnel are moving towards the metal air door. The walkie-talkie continuously monitors relay station A, and at the same time scans relay station B outside the air door and relay station C in the branch roadway, updating the RSSI, LQ, load rate and other data of the three relay stations A, B and C in real time.

[0063] Specifically, based on communication quality information, a first candidate MESH relay station with a score higher than a preset score threshold is selected from the surrounding MESH relay stations, and the first candidate MESH relay station is pre-scanned and pre-registered. This can be implemented in the following ways: The walkie-talkie uses real-time collected communication quality information to comprehensively score and rank the surrounding relay stations, and selects relay stations with scores higher than a preset scoring threshold (such as a comprehensive score ≥ 70 points) as the first candidate MESH relay station set. In one possible implementation, during the movement, the walkie-talkie collects the historical signal strength sequence of the target MESH relay station and surrounding MESH relay stations, and predicts the signal strength change trend of each MESH relay station based on the historical signal strength sequence; when it is predicted that the signal strength of the target MESH relay station will drop below the switching threshold within a preset time period, the pre-scanning and pre-registration process for candidate MESH relay stations is initiated in advance.

[0064] The historical signal strength sequence refers to the sequence of RSSI values ​​recorded by the walkie-talkie within a recent period, which can be set to the previous 5 seconds, with a sampling period of 100 milliseconds. The walkie-talkie can use linear regression, Kalman filtering, or simple moving average prediction algorithms to infer the trend of signal strength changes within the next 1-2 seconds. If the prediction result shows that the signal of the currently registered relay station is about to rapidly decay below the handover threshold, the pre-scanning and pre-registration process is triggered immediately without waiting for the signal to actually fall below the threshold. This allows for the detection and pre-registration preparation of candidate stations to be completed in advance when the signal is still acceptable, and the handover can be completed quickly when the signal actually deteriorates, avoiding untimely handover due to a sudden drop in signal strength. By predicting signal trends in advance to prepare for handover, the handover lag problem caused by a sharp drop in signal strength in traditional solutions is effectively overcome.

[0065] For the first candidate relay station selected, the walkie-talkie performs pre-scanning and pre-registration preparation: continuously tracking its signal changes, updating the score, and saving access parameters; when the candidate station signal is stable and the link quality is good, lightweight pre-registration verification is completed in advance (such as bidirectional connectivity of the probe frame and latency ≤50ms), maintaining the "ready to access" state to avoid temporary handshake time consumption during handover.

[0066] like Figure 3In some embodiments, the walkie-talkie selects at least two candidate MESH relays that meet the registration conditions from the surrounding MESH relays, sends a pre-registration request to each of the at least two candidate MESH relays, completes identity verification and parameter negotiation but does not activate the voice channel, and maintains the waiting-to-switch state; when the signal strength of the target MESH relay is lower than the switching threshold, the best one is selected from the candidate MESH relays in the waiting-to-switch state to complete the switch.

[0067] The "pending handover" state refers to a situation where the walkie-talkie and the candidate MESH relay station have completed preparatory work such as identity authentication, key negotiation, and resource reservation, but have not yet been allocated voice time slots or activated service channels. During normal communication, in addition to maintaining a connection with the currently registered relay station, the walkie-talkie proactively initiates a pre-registration process with multiple surrounding relay stations that meet signal quality standards, sending its own ID, group information, and authentication credentials. Once the candidate station verifies the information, it returns a pre-registration success response and reserves some access resources for that walkie-talkie. When a handover is needed, the walkie-talkie does not need to re-execute the complete registration process; it only needs to send a handover confirmation to the optimal station selected in the pre-registration. That station immediately activates the reserved resources and allocates voice time slots. The walkie-talkie can maintain the "pending handover" state of 2-3 candidate stations simultaneously and dynamically update the pre-registration list based on real-time signal quality.

[0068] By pre-registering on multiple candidate stations, the actual roaming handover time is significantly reduced, achieving truly seamless handover. Compared to single-candidate pre-registration, this solution provides more reliable handover redundancy; even if the best candidate station experiences a sudden malfunction, it can immediately switch to the second-best pre-registered station.

[0069] For example, if relay station A scores 82 points, relay station B scores 78 points, and relay station C scores 65 points, and the preset priority threshold is 70 points, then the first candidate MESH relay station can be selected as relay station B. The walkie-talkie continuously pre-scans relay station B to confirm that its RSSI is stable at -75dBm, LQ=88, and load rate is 25%, completing the pre-verification and maintaining pre-registration readiness.

[0070] By setting priority thresholds to filter high-quality candidate relay stations and conducting continuous pre-scanning, link detection and pre-verification of candidate stations, access preparation can be completed in advance and the station can be kept in a ready-to-access state. There is no need for temporary handshake negotiation after link deterioration, which can effectively shorten the roaming handover time and avoid handover lag and excessive latency.

[0071] Specifically, when the signal strength of the target MESH relay station is lower than a preset threshold, the first candidate MESH relay station with the highest signal strength is selected for network registration. After registration, the connection with the target MESH relay station is disconnected. This can be implemented in the following ways: The walkie-talkie monitors the signal strength of the current target relay station A in real time; when the RSSI of relay station A is continuously lower than the preset signal strength threshold (such as -85dBm), it determines that the current link is degraded and triggers the roaming handover process.

[0072] For example, when personnel pass through a metal ventilation door, the RSSI of relay station A drops sharply from -70dBm to -92dBm, which is below the threshold of -85dBm, triggering a roaming handover.

[0073] In some embodiments, the conditions for triggering roaming switching may also be: LQ continuously below 60, or a score more than 10 points lower than the first candidate relay station B.

[0074] After roaming is triggered, the walkie-talkie selects the relay station with the highest signal strength and the best overall score (relay station B in this example) from the first candidate MESH relay stations as the new target relay station; It should be noted that, as Figure 4 While the walkie-talkie is connected to the currently registered MESH relay station, the voice silence period of the walkie-talkie group is monitored; when a voice silence period is detected, the automatic switch to a new MESH relay station is initiated, and the automatic switch process is paused until voice activity resumes.

[0075] Understandably, during normal communication, the group to which the walkie-talkie belongs continuously transmits voice frames. A voice silence period refers to the idle time between two consecutive voice frames in a group conversation, during which no walkie-talkie is transmitting voice data. Walkie-talkies can determine if they are in a silence period by detecting uplink voice activity or monitoring the carrier status of other walkie-talkies in the group. When there is no voice activity for a continuous period, it is determined that a voice silence period has begun. The walkie-talkie uses this time to perform the scanning, pre-registration, and authentication operations required for repeater switching, avoiding switching during voice transmission. After the switch is completed, the walkie-talkie continues to maintain its connection with the original repeater and does not trigger a new switch during the resumption of voice activity, preventing frequent switching due to environmental fluctuations from affecting the call. Specifically, the walkie-talkie's built-in voice activity detection module continuously monitors microphone input and group downlink voice. When there is no voice activity for a continuous period, it determines that a silence period has begun and triggers the switching process. If a sudden resumption of voice activity is detected during the switching process, the switching decision is immediately frozen to ensure that the current voice frame is not interrupted, and the switching process continues only after the voice activity ends.

[0076] By deeply coupling the characteristics of intercom services with network switching, and utilizing the natural voice intervals in group intercoms to complete relay switching, the voice frame loss or interruption that may occur during the switching process is fundamentally avoided.

[0077] Send a formal network registration request containing the walkie-talkie ID, group information, and authentication key to relay station B.

[0078] After relay station B completes authentication and resource allocation, it returns a registration success response; the walkie-talkie synchronizes the group list, roaming parameters, and channel configuration of relay station B, officially connects to relay station B, and establishes a two-way voice link.

[0079] After registration and voice switching are complete, the walkie-talkie smoothly disconnects from the original target relay station A, releasing access resources and completing the roaming handover. Throughout the process, the session remains uninterrupted, there are no dropped voice frames, and the group's online status remains unchanged.

[0080] Understandably, when the walkie-talkie is in an area where the coverage of multiple MESH relay stations overlaps, the signal strength and load rate of each MESH relay station are monitored simultaneously. If the signal strength of the currently registered target MESH relay station is still higher than the handover threshold but the load rate is higher than the preset load limit, then the system will actively hand over to an adjacent MESH relay station with a signal strength that meets the requirements and a lower load rate.

[0081] The overlapping coverage area refers to the region where the walkie-talkie can simultaneously receive signals from two or more MESH relay stations, and the signal quality of all signals meets the requirements. By listening to relay station broadcasts, the walkie-talkie periodically measures the signal strength and load rate of surrounding relay stations. The preset load limit can be set according to the relay station's performance, such as 70% or 80%. When it is detected that the currently registered relay station has a good signal but its load rate has exceeded the limit, it indicates that the relay station is congested, and continued use may cause voice delays or packet loss. At this time, even if the signal strength still meets the requirements, the walkie-talkie will actively search for a neighboring relay station with a sufficient signal strength and a lower load rate, and perform a handover. The "signal strength meets the requirements" in the handover condition means that the RSSI of the candidate station is not lower than the preset threshold to ensure that the voice quality is not degraded after the handover.

[0082] When an access relay station is overloaded, the system automatically migrates to a less busy relay station, thus maintaining balanced communication quality across the entire network. Unlike traditional handover methods that only trigger when the signal is poor, this solution proactively switches over when the signal is good but the load is too high, preventing call quality degradation caused by congestion. This method is particularly suitable for areas in mines where personnel temporarily gather, as it can automatically optimize resource allocation and improve the overall stability of group intercoms.

[0083] For example, the walkie-talkie initiates registration with relay station B, and after relay station B authenticates it, it allocates a time slot; after the walkie-talkie connects to relay station B, the voice seamlessly switches from relay station A to relay station B, and then disconnects from relay station A, continuing normal group communication outside the damper.

[0084] In this embodiment, after roaming is triggered, the walkie-talkie maintains the current voice conversation while completing the selection, pre-verification, and registration migration of the new target MESH relay station, achieving seamless switching and ensuring that the walkie-talkie is not interrupted and the group conversation is not exited.

[0085] 103. In response to an intercom event, acquire the voice data corresponding to the intercom event and send the voice data to the currently registered MESH relay station, so that the currently registered MESH relay station can transmit voice data to other communication intercoms and other MESH relay stations, wherein the other communication intercoms are intercoms that have registered with the currently registered MESH relay station.

[0086] In this embodiment, when the walkie-talkie detects and responds to a locally initiated intercom event, it first collects and encodes the voice service data corresponding to the intercom event in real time; it then encapsulates the generated voice data into a transmission message that conforms to the mine MESH communication protocol, and actively initiates uplink transmission to the MESH relay station that has completed network registration and established a communication link, thus pushing the encoded voice data completely to the currently registered MESH relay station.

[0087] After receiving the voice data, the currently registered MESH relay station will, on the one hand, broadcast and forward it locally to other communication walkie-talkies within its coverage area that have completed network registration at the MESH relay station and joined the same walkie-talkie group, so that all online group walkie-talkies under the same station can receive the walkie-talkie voice synchronously. On the other hand, the currently registered MESH relay station also forwards the voice data to other MESH relay stations in the network via the station's wireless MESH link or wired interconnection link; the other MESH relay stations then broadcast and distribute the data a second time to the walkie-talkies registered in the same group within their respective coverage areas.

[0088] This enables a single walkie-talkie to initiate a conversation, and the voice data is distributed in multiple directions through the local relay station and forwarded step by step through the MESH relay stations across the entire network, ultimately completing real-time group communication broadcasts for all walkie-talkies in the same group throughout the entire mine.

[0089] This application discloses a MESH group intercom method for mines, applied to walkie-talkies. The method includes: detecting multiple MESH relay stations around the mine and selecting a target MESH relay station that meets the registration conditions to register and join the intercom group; automatically switching to a new MESH relay station for registration based on the communication quality information of the target MESH relay station and surrounding MESH relay stations during movement within the mine; and in response to an intercom event, acquiring the voice data corresponding to the intercom event and sending the voice data to the currently registered MESH relay station, so that the currently registered MESH relay station can transmit voice data to other communication walkie-talkies and other MESH relay stations, wherein the other communication walkie-talkies are walkie-talkies that have registered with the currently registered MESH relay station. This ensures the continuity and reliability of large-scale group intercom, adapts to the intercom needs of full coverage in the mine, and realizes large-scale group intercom in the mine environment.

[0090] Please see Figure 5 , Figure 5 This is a flowchart illustrating another method for MESH group intercom in a mine, provided as an embodiment of this application. Taking a MESH relay station as an example, the specific process of this mine MESH group intercom method can be as follows: 201. Receive the network registration request sent by the walkie-talkie through the short-range wireless module, complete the identity verification of the walkie-talkie and register the network registration information of the walkie-talkie based on the network registration request.

[0091] In this embodiment, the MESH relay station deployed in the mine is normally in wireless monitoring mode, receiving network registration request messages sent by walkie-talkies within its coverage area in real time via a short-range wireless module. The MESH relay station parses the received registration request messages, extracting the walkie-talkie's unique device identifier, group identifier, authentication key, and key parameters such as current RSSI and link quality level (LQ).

[0092] MESH relay stations conduct multi-dimensional identity and access qualification verification based on the parsed information: comparing the legality of the authentication key, verifying the authorization permissions of the intercom group, and verifying whether the signal strength and link quality meet the preset access threshold.

[0093] Once all verifications are successful, the MESH repeater station sends a registration success response to the walkie-talkie and distributes communication configuration parameters such as channel and time slot. If any verification fails, a registration failure message is returned, allowing the walkie-talkie to re-initiate registration or switch to another MESH repeater station.

[0094] After registration and verification are passed, the relay station will enter the walkie-talkie's device identification, group affiliation, network access time, allocated communication resources, signal quality status, and other network access information into the local terminal management database and synchronize it to all MESH relay stations in the network for sharing. After the information registration is completed, the walkie-talkie is officially connected to the network and can send and receive voice messages and participate in group communication. The relay station will maintain and update the online status of the terminal in real time.

[0095] For example, after walkie-talkie A selects MESH relay station B, it sends a registration request carrying the device identifier, group number, authentication key, and RSSI and LQ parameters. After MESH relay station B completes the verification of the key, group permissions, and signal quality and all are qualified, it issues the communication configuration and registers the network access information. Walkie-talkie A officially joins the network and can conduct group walkie-talkie communication normally.

[0096] 202. Receive the registration and handover request sent by the walkie-talkie through the short-range wireless module, and complete the MESH relay station registration and handover of the walkie-talkie based on the registration and handover request.

[0097] MESH relay stations continuously monitor and receive registration / switching requests from walkie-talkies within their communication range in real time via short-range wireless communication modules.

[0098] When a MESH relay station receives a registration handover request initiated by a walkie-talkie due to location change, degradation of the original link signal, or excessive load, it first parses the unique identifier of the walkie-talkie, its group information, authentication parameters, and the current link quality status carried in the handover request.

[0099] Based on the handover request information, the relay station quickly verifies the walkie-talkie's identity, group permissions, and access qualifications. After successful verification, the relay station completes the allocation of access resources, session state inheritance, and group information synchronization for the walkie-talkie, enabling the walkie-talkie to switch and migrate from its original registered MESH relay station to its registered station.

[0100] Meanwhile, the relay station updates the online terminal list and network topology information across the entire network to ensure uninterrupted intercom group conversations and continuous terminal online status. After the handover is completed, the walkie-talkie will be taken over by the current relay station for subsequent voice transmission and reception, signaling interaction and roaming management services without the need for complete re-registration, thus improving the efficiency and stability of communication handover during mobile operations.

[0101] 203. Receive voice data sent by registered walkie-talkies via a short-range wireless module, and transmit voice data to other communication walkie-talkies, wherein the other communication walkie-talkies are walkie-talkies that have registered with the MESH relay station.

[0102] After completing the network registration, identity verification, and resource allocation of walkie-talkies, the MESH repeater station continuously monitors and receives the encoded voice data sent uplink by the registered walkie-talkies in real time through the short-range wireless communication module.

[0103] When a MESH relay station receives voice data transmitted by a registered walkie-talkie initiating a two-way communication service, it parses, caches, and encapsulates the voice data message. Then, within the wireless coverage area of ​​the relay station, it forwards the voice data to all other walkie-talkies that have completed network registration at the MESH relay station and belong to the same two-way communication group via group broadcast.

[0104] Other walkie-talkies registered within the MESH relay station receive and decode the broadcast voice data, thereby enabling real-time group communication between multiple walkie-talkies within the coverage area of ​​the same MESH relay station. At the same time, the MESH relay station retains the voice data forwarding sequence and session identifier to ensure orderly, error-free, and frame-free voice transmission, ensuring that the underground group communication voice is coherent and clear.

[0105] 204. Establish communication connections with other MESH relay stations through long-range wireless modules and transmit voice data to other MESH relay stations.

[0106] MESH relay stations periodically scan for signals from other MESH relay stations in the vicinity. When the signal strength and link quality of a neighboring relay station reach a preset threshold, a connection request can be initiated, carrying the station's identifier and network parameters.

[0107] After receiving the request, the neighboring relay station completes the network identity and group verification, negotiates the channel, encryption and transmission parameters, establishes a stable long-distance wireless communication link, and monitors the link status in real time to adaptively maintain communication reliability.

[0108] When a MESH relay station receives voice data uploaded by its own walkie-talkie, it verifies the data, repackages it, and marks the group and timing information to adapt it to the long-distance transmission format between MESH relay stations.

[0109] MESH relay stations forward encapsulated voice data to neighboring MESH relay stations via established long-distance links. After receiving and parsing the data, neighboring MESH relay stations can either distribute it to walkie-talkies registered to their station or continue forwarding it to subsequent relay stations, achieving multi-hop transmission across the entire network.

[0110] During transmission, a status monitoring and retransmission mechanism ensures that voice data is forwarded in an orderly manner without packet loss or duplication, enabling cross-tunnel and cross-regional group intercom communication throughout the entire mine.

[0111] For example, relay station A in the main roadway and relay station B in the branch roadway establish a link through a long-distance module. After receiving local walkie-talkie voice data, relay station A forwards it to relay station B. Relay station B registers the walkie-talkie broadcast voice with its own station and forwards it to relay station C, which is adjacent to relay station B and has established a connection, thus completing voice communication between multiple stations.

[0112] In some embodiments, a MESH relay station further includes: a long-distance wired module; The method may also include the following steps: If the communication connection between a MESH relay station and other MESH relay stations via the long-range wireless module is interrupted or the communication quality is lower than the preset communication quality, the station will switch to the long-range wired module to communicate with other MESH relay stations via wired communication.

[0113] In this embodiment, the MESH relay station is equipped with both a long-range wireless module and a long-range wired module. Under normal operating conditions, the long-range wireless module is used first to establish a link with the adjacent MESH relay station to complete the cross-site forwarding of voice data and the interaction of network signaling.

[0114] MESH relay stations periodically monitor the wireless link connectivity and communication quality in real time, collecting parameters such as RSSI, link quality LQ, latency, and packet loss rate, and comparing them with preset thresholds corresponding to each parameter.

[0115] When the wireless link communication connection is interrupted, or the communication quality is consistently lower than the preset threshold and cannot meet the intercom transmission requirements, the link switching mechanism is automatically triggered.

[0116] After the switchover is triggered, the MESH relay station disables long-distance wireless cross-site communication and enables long-distance wired modules. It initiates a wired connection request to the neighboring station via a pre-set wired communication line underground. After the neighboring station completes network identity verification and communication parameter negotiation, a stable wired communication link is established.

[0117] After the link switch is completed, the relay station will switch the voice data and terminal status signaling to wired transmission, so as to achieve seamless data forwarding across relay stations and ensure the continuous and stable operation of group intercom services.

[0118] For example, MESH relay stations A and B communicate via long-distance wireless modules. When the metal shielding door is closed, the wireless signal is blocked and the link is interrupted. Relay stations A and B automatically switch to wired modules and establish a wired link through the underground communication cable to forward intercom voice data normally, ensuring uninterrupted intercom communication across areas.

[0119] In some embodiments, if the wireless link subsequently recovers to acceptable communication quality, it can automatically switch back to wireless mode or maintain the wired link operation.

[0120] In some embodiments, for two adjacent MESH relay stations, if there are no communication obstacles between them, wireless communication can be carried out based on a long-distance wireless communication module; if there are communication obstacles between them, wired communication can be carried out based on a long-distance wired communication module.

[0121] For example, please see Figure 6 , Figure 6 This is a schematic diagram illustrating an application scenario of a MESH group intercom method in a mine, provided in an embodiment of this application. Figure 6 As shown, MESH relay station 1 and MESH relay station 2 are adjacent, and there are no communication obstacles between them, so wireless communication can be carried out based on a long-distance wireless communication module; MESH relay station 2 and MESH relay station 3 are adjacent, and there are communication obstacles (fire doors) between them, so wired communication can be carried out based on a long-distance wired communication module.

[0122] In some embodiments, the MESH relay station further includes: a main control module; the main control module is used to control the data exchange between the long-range wireless module, the long-range wired module, and the short-range wireless module.

[0123] The MESH relay station provided in this application embodiment may include: a short-range wireless module, a long-range wireless module, a long-range wired module, and a main control module.

[0124] For example, please see Figure 7 , Figure 7 This is a structural block diagram of a MESH relay station provided in an embodiment of this application. The MESH relay station can integrate a short-range wireless module, a long-range wireless module, a long-range wired module, and a main control module.

[0125] Among them, the main control module, as the core scheduling and control unit of the relay station, uniformly manages the working status, transmission and reception timing and data flow logic of the short-range wireless module, long-range wireless module and long-range wired module.

[0126] Specifically, the main control module can receive voice data, registration requests, and roaming signaling collected by the short-range wireless module from the local network walkie-talkie in real time; at the same time, it can coordinate cross-site interconnection data between the long-range wireless module, the long-range wired module, and other MESH relay stations. The main control module is responsible for data exchange and routing scheduling between modules: distributing the uplink data received by the terminal from the near-field wireless module to the long-field wireless module or long-field wired module as needed, and forwarding it to other relay stations in the network; at the same time, it sends the downlink voice data and network signaling received by the long-field wireless module and long-field wired module from neighboring stations to the near-field wireless module and broadcasts it to each walkie-talkie registered at this station; In addition, the main control module can intelligently schedule the switching between long-distance wireless modules and long-distance wired modules based on the quality of the link, coordinate the transmission and reception priorities, cache management and protocol encapsulation and parsing of each module, and ensure orderly interaction and stable transmission of voice data and control signaling between local terminals and adjacent relay stations, so as to realize the data relay forwarding and service collaborative operation of the entire MESH network.

[0127] The functions of other modules can be found in the above description, and will not be elaborated upon here.

[0128] This application discloses a MESH group intercom method for mines, applied to MESH relay stations. The method includes: receiving a network registration request from a walkie-talkie via a short-range wireless module; verifying the walkie-talkie's identity and registering its network information based on the request; receiving a registration switch request from the walkie-talkie via the short-range wireless module; completing the MESH relay station registration switch for the walkie-talkie based on the request; receiving voice data from the registered walkie-talkie via the short-range wireless module and transmitting the voice data to other communication walkie-talkies, wherein the other communication walkie-talkies are those registered at the MESH relay station; and establishing communication connections with other MESH relay stations via a long-range wireless module and transmitting voice data to these other relay stations. This ensures that walkie-talkies can access qualified relay stations in different areas of the mine, laying a stable foundation for large-scale group intercom.

[0129] Based on the above description, the following examples will further illustrate the MESH group intercom method for mines described in this application. Please refer to... Figure 8 , Figure 8 This is a schematic diagram illustrating an application scenario of another MESH group intercom method in a mine, provided in an embodiment of this application. MESH relay station 1, MESH relay station 2, MESH relay station 3, and MESH relay station 4 are intercom relay devices deployed at fixed locations within the mine; walkie-talkie 1, walkie-talkie 2, walkie-talkie 3, and walkie-talkie 4 are walkie-talkies worn by underground workers.

[0130] The specific process can be as follows: The walkie-talkies carried by the staff (e.g., walkie-talkie 1) will continuously monitor the surrounding MESH relay stations and register with the nearest MESH relay station (e.g., MESH relay station 2).

[0131] When a worker moves within the mine tunnel with walkie-talkie 1, for example, when the communication range of MESH relay station 2 moves to the communication range of another MESH relay station 3, walkie-talkie 1 will automatically roam and switch to the new MESH relay station (i.e., MESH relay station 3) to register according to the signal command.

[0132] When walkie-talkie 1 initiates a conversation, the voice data will not only be transmitted to the walkie-talkie in MESH relay station 2, but also transmitted out through MESH relay station 2, and then sequentially through MESH relay station 1 and MESH relay station 3 to walkie-talkie 3 and walkie-talkie 4, thus realizing group communication.

[0133] To facilitate better implementation of the mine MESH group intercom method provided in this application, this application also provides a mine MESH group intercom device based on the above-described mine MESH group intercom method. The meanings of the terms used are the same as in the mine MESH group intercom method described above, and specific implementation details can be found in the description of the method embodiments.

[0134] Please see Figure 9 , Figure 9 A structural block diagram of a mine mesh group intercom device provided in this application embodiment, the device comprising: The detection unit 301 is used to detect multiple MESH relay stations around the mine and select a target MESH relay station that meets the registration conditions from the multiple MESH relay stations for network registration in order to join the intercom group; The switching unit 302 is used to automatically switch to a new MESH relay station for network registration during movement within the mine, based on the communication quality information of the target MESH relay station and surrounding MESH relay stations. The transmitting unit 303 is used to respond to an intercom event, acquire the voice data corresponding to the intercom event, and send the voice data to the currently registered MESH relay station, so that the currently registered MESH relay station can transmit voice data to other communication intercoms and other MESH relay stations, wherein the other communication intercoms are intercoms that have registered with the currently registered MESH relay station.

[0135] In some embodiments, the switching unit 302 may include: The detection subunit is used to detect the communication quality information of the target MESH relay station and surrounding MESH relay stations in real time during the movement process. The first screening subunit is used to select first candidate MESH relay stations with scores higher than a preset score threshold from the surrounding MESH relay stations based on communication quality information, and to pre-scan and pre-register the first candidate MESH relay stations. The first registration subunit is used to select the first candidate MESH relay station with the highest signal strength for network registration when the signal strength of the target MESH relay station is lower than a preset threshold. After registration is completed, the connection with the target MESH relay station is disconnected.

[0136] In some embodiments, the detection unit 301 may include: The scanning subunit is used to scan the wireless signals transmitted by the surrounding MESH relay stations and collect communication quality information, operating status information and historical connection information of each MESH relay station. The second screening subunit is used to select online candidate MESH relay stations with qualified signal quality from multiple MESH relay stations based on communication quality information, operation status information and historical connection information. The sub-unit is determined to perform weighted scoring on each candidate MESH relay station, and the candidate MESH relay station with the highest score is determined as the target MESH relay station. The second registration subunit is used to complete security authentication and registration after pre-connection verification with the target MESH relay station, synchronize group configuration, and join the intercom group.

[0137] This application discloses a MESH group intercom device for mines. A detection unit 301 detects multiple MESH relay stations around the mine and selects a target MESH relay station that meets the registration conditions for network registration to join the intercom group. A switching unit 302, while moving within the mine, automatically switches to a new MESH relay station for network registration based on the communication quality information of the target MESH relay station and surrounding MESH relay stations. A sending unit 303 responds to intercom events, acquires the corresponding voice data, and sends the voice data to the currently registered MESH relay station, enabling the currently registered MESH relay station to transmit voice data to other communication intercoms and other MESH relay stations. These other communication intercoms are those that have registered with the currently registered MESH relay station. This ensures the continuity and reliability of large-scale group intercom, adapts to the intercom needs of full mine coverage, and thus realizes large-scale group intercom in a mine environment.

[0138] Accordingly, embodiments of this application also provide an electronic device. For example... Figure 10 As shown, Figure 10 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device 400 includes a processor 401 with one or more processing cores, a memory 402 with one or more computer-readable storage media, and a computer program stored in the memory 402 and executable on the processor. The processor 401 and the memory 402 are electrically connected. Those skilled in the art will understand that... Figure 10 The electronic device structures shown herein do not constitute a limitation on electronic devices and may include, but are not limited to, those shown. Figure 10 It can show more or fewer parts, or combine certain parts, or arrange different parts.

[0139] The processor 401 is the control center of the electronic device 400. It connects various parts of the electronic device 400 through various interfaces and lines. By running or loading software programs and / or modules stored in the memory 402, and calling data stored in the memory 402, it performs various functions of the electronic device 400 and processes data, thereby monitoring the electronic device 400 as a whole.

[0140] In this embodiment, the processor 401 in the electronic device 400 loads the instructions corresponding to the processes of one or more applications into the memory 402 according to the following steps, and the processor 401 runs the applications stored in the memory 402 to realize various functions: The system detects multiple MESH relay stations around the mine and selects a target MESH relay station that meets the registration requirements to register and join the intercom group. During movement within the mine, based on the communication quality information of the target MESH relay station and surrounding MESH relay stations, it automatically switches to a new MESH relay station for network registration. In response to an intercom event, the system acquires the corresponding voice data and sends the voice data to the currently registered MESH relay station, enabling the currently registered MESH relay station to transmit voice data to other communication intercoms and other MESH relay stations. The other communication intercoms are intercoms that have registered with the currently registered MESH relay station.

[0141] This application embodiment detects multiple MESH relay stations around the mine and selects a target MESH relay station that meets the registration conditions to join the network and register, thereby joining the intercom group. During movement within the mine, based on the communication quality information of the target MESH relay station and surrounding MESH relay stations, it automatically switches to a new MESH relay station for network registration. In response to an intercom event, it acquires the corresponding voice data and sends the voice data to the currently registered MESH relay station, enabling the currently registered MESH relay station to transmit voice data to other communication intercoms and other MESH relay stations. These other communication intercoms are those that have registered with the currently registered MESH relay station. This ensures the continuity and reliability of large-scale group intercoms, adapting to the intercom needs of full mine coverage, thus realizing large-scale group intercoms in a mine environment.

[0142] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0143] Optional, such as Figure 10As shown, the electronic device 400 may further include a display 403 and an input unit 404. The processor 401 is electrically connected to both the display 403 and the input unit 404. Those skilled in the art will understand that... Figure 10 The electronic device structure shown does not constitute a limitation on the electronic device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0144] Display 403 can be used to display a graphical user interface (GUI) and receive operation commands generated by the user interacting with the GUI. Display 403 may include a display panel and a touch panel. The display panel can be used to display information input by the user or information provided to the user, as well as various graphical user interfaces of the electronic device. These graphical user interfaces can be composed of graphics, guidance information, icons, video, and any combination thereof. Optionally, the display panel can be configured using a liquid crystal display (LCD), organic light-emitting diode (OLED), or other similar technologies. The touch panel can be used to collect touch operations performed by the user on or near it (such as operations performed by the user using a finger, stylus, or any suitable object or accessory on or near the touch panel), generate corresponding operation commands, and execute the corresponding program according to the operation commands. Optionally, the touch panel may include a touch detection device and a touch controller.

[0145] The touch detection device detects the user's touch location and the signal generated by the touch operation, transmitting the signal to the touch controller. The touch controller receives touch information from the touch detection device, converts it into touch point coordinates, and sends it to the processor 401. It can also receive and execute commands from the processor 401. The touch panel can cover the display panel. When the touch panel detects a touch operation on or near it, it transmits the information to the processor 401 to determine the type of touch event. Subsequently, the processor 401 provides corresponding visual output on the display panel based on the type of touch event. In this embodiment, the touch panel and display panel can be integrated into the display 403 to achieve input and output functions. However, in some embodiments, the touch panel and display panel can be implemented as two independent components to achieve input and output functions. That is, the display 403 can also be used as part of the input unit 404 to achieve input functions.

[0146] The input unit 404 can be used to receive input numbers, characters, or user characteristic information (such as fingerprints, iris, facial information, etc.), and to generate keyboard, mouse, joystick, optical, or trackball signal inputs related to user settings and function control.

[0147] In some embodiments, the electronic device may further include an audio circuit, which can provide an audio interface between the user and the device control device via a speaker and a microphone. The audio circuit can convert received audio data into electrical signals and transmit them to the speaker, where the speaker converts them into sound signals for output. Conversely, the microphone converts collected sound signals into electrical signals, which are then received by the audio circuit, converted back into audio data, and processed by the processor 401. The audio data is then transmitted via a radio frequency circuit to, for example, another device control device, or output to a memory 402 for further processing. The audio circuit may also include an earphone jack to provide communication between a peripheral headset and the device control device.

[0148] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0149] As can be seen from the above, the electronic device provided in this embodiment can detect multiple MESH relay stations around the mine and select a target MESH relay station that meets the registration conditions from among the multiple MESH relay stations for network registration to join the intercom group; during movement within the mine, it automatically switches to a new MESH relay station for network registration based on the communication quality information of the target MESH relay station and surrounding MESH relay stations; in response to an intercom event, it acquires the voice data corresponding to the intercom event and sends the voice data to the currently registered MESH relay station, so that the currently registered MESH relay station can transmit voice data to other communication intercoms and other MESH relay stations, wherein the other communication intercoms are intercoms that have registered for network registration at the currently registered MESH relay station.

[0150] Alternatively, the electronic device provided in this embodiment can receive a network registration request sent by a walkie-talkie via a short-range wireless module, complete the walkie-talkie identity verification and register the walkie-talkie's network access information based on the network registration request; receive a registration switch request sent by a walkie-talkie via a short-range wireless module, complete the MESH relay station registration switch of the walkie-talkie based on the registration switch request; receive voice data sent by the registered walkie-talkie via a short-range wireless module, and transmit voice data to other communication walkie-talkies, wherein the other communication walkie-talkies are walkie-talkies that have registered for network access at the MESH relay station; and establish communication connections with other MESH relay stations via a long-range wireless module, and transmit voice data to other MESH relay stations.

[0151] Therefore, embodiments of this application provide a computer-readable storage medium storing a plurality of computer programs that can be loaded by a digital signal processor to execute the steps of any of the device control methods provided in embodiments of this application. For example, the computer program can execute the following steps: By detecting multiple MESH relay stations around the mine, and selecting a target MESH relay station that meets the registration requirements from among the multiple MESH relay stations for network registration, one can join the intercom group; During movement within the mine, based on the communication quality information of the target MESH relay station and surrounding MESH relay stations, it automatically switches to a new MESH relay station for network registration. In response to an intercom event, the system acquires the corresponding voice data and sends the voice data to the currently registered MESH relay station, enabling the currently registered MESH relay station to transmit voice data to other communication intercoms and other MESH relay stations. The other communication intercoms are intercoms that have registered with the currently registered MESH relay station.

[0152] This application embodiment detects multiple MESH relay stations around the mine and selects a target MESH relay station that meets the registration conditions to join the network and register, thereby joining the intercom group. During movement within the mine, based on the communication quality information of the target MESH relay station and surrounding MESH relay stations, it automatically switches to a new MESH relay station for network registration. In response to an intercom event, it acquires the corresponding voice data and sends the voice data to the currently registered MESH relay station, enabling the currently registered MESH relay station to transmit voice data to other communication intercoms and other MESH relay stations. These other communication intercoms are those that have registered with the currently registered MESH relay station. This ensures the continuity and reliability of large-scale group intercoms, adapting to the intercom needs of full mine coverage, thus realizing large-scale group intercoms in a mine environment.

[0153] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0154] The computer-readable storage medium may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0155] Since the computer program stored in the computer-readable storage medium can execute the steps of any of the device control methods provided in the embodiments of this application, the beneficial effects that any of the device control methods provided in the embodiments of this application can achieve can be realized, as detailed in the preceding embodiments, and will not be repeated here.

[0156] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. A method for MESH group intercom in a mine, applied to walkie-talkies, characterized in that, The method includes: Detect multiple MESH relay stations around the mine, and select a target MESH relay station that meets the registration conditions from among the multiple MESH relay stations to register for network access and join the intercom group; During movement within the mine, based on the communication quality information of the target MESH relay station and surrounding MESH relay stations, the system automatically switches to a new MESH relay station for network registration. During movement, the system continuously monitors the communication quality information of the target MESH relay station and surrounding MESH relay stations. Based on this communication quality information, a first candidate MESH relay station with a score higher than a preset score threshold is selected from the surrounding MESH relay stations, and pre-scanning and pre-registering are performed on this first candidate MESH relay station. When the signal strength of the target MESH relay station is lower than a preset threshold, the first candidate MESH relay station with the highest signal strength is selected for network registration. After registration, the connection with the target MESH relay station is disconnected. Select at least two candidate MESH relay stations that meet the registration conditions from the MESH relay stations around the walkie-talkie, send pre-registration requests to at least two candidate MESH relay stations respectively, complete identity verification and parameter negotiation but do not activate the voice channel, and maintain the waiting-to-switch state; when the signal strength of the target MESH relay station is lower than the switching threshold, select the best one from the candidate MESH relay stations in the waiting-to-switch state to complete the switch. In response to an intercom event, the system acquires the voice data corresponding to the intercom event and sends the voice data to the currently registered MESH relay station, so that the currently registered MESH relay station can transmit the voice data to other communication intercoms and other MESH relay stations, wherein the other communication intercoms are intercoms that have registered with the currently registered MESH relay station. The process involves detecting multiple MESH relay stations around the mine and selecting a target MESH relay station that meets the registration requirements for network registration, including: Scan the wireless signals transmitted by surrounding MESH relay stations and collect communication quality information, operation status information, and historical connection information of each MESH relay station; Based on the communication quality information, the operating status information, and the historical connection information, candidate MESH relay stations that are online and meet the signal quality standards are selected from the multiple MESH relay stations; Each candidate MESH relay station is weighted and scored, and the candidate MESH relay station with the highest score is determined as the target MESH relay station. After pre-connection verification with the target MESH relay station, security authentication and registration are completed, group configuration is synchronized, and the user is added to the intercom group.

2. The method according to claim 1, characterized in that, The method further includes: Obtain the motion state information of the walkie-talkie, and estimate the moving speed of the walkie-talkie based on the motion state information; When the moving speed exceeds a preset speed threshold, the weight of the signal strength change rate in the weighted score is increased, and the preset threshold of the signal strength that triggers the switching is increased accordingly.

3. The method according to claim 1, characterized in that, The method further includes: While the walkie-talkie is connected to the currently registered MESH relay station, the voice silence period of the walkie-talkie group to which the walkie-talkie belongs is monitored; When a voice silence period is detected, the process of automatically switching to a new MESH relay station is initiated.

4. The method according to claim 1, characterized in that, The method further includes: Listen for load broadcast information from surrounding MESH relay stations; When selecting a target MESH relay station that meets the registration conditions from multiple MESH relay stations, the current load rate of each MESH relay station is used as an indicator of the weighted score, and MESH relay stations with load rates lower than a preset load threshold are selected first.

5. The method according to claim 1, characterized in that, The method further includes: During the movement, the historical signal strength sequences of the target MESH relay station and surrounding MESH relay stations are collected, and the signal strength change trend of each MESH relay station is predicted based on the historical signal strength sequences. When it is predicted that the signal strength of the target MESH relay station will drop below the switching threshold within a preset time period, the pre-scanning and pre-registration process for the candidate MESH relay station is initiated in advance.

6. The method according to claim 1, characterized in that, The method further includes: When the walkie-talkie is in an area where the coverage of multiple MESH relay stations overlaps, the signal strength and load rate of each MESH relay station are monitored simultaneously. If the signal strength of the currently registered target MESH relay station is still higher than the handover threshold but the load rate is higher than the preset load limit, then actively hand over to the adjacent MESH relay station with a signal strength that meets the requirements and a lower load rate.

7. A method for group intercom in a mine, applied to a mesh relay station, wherein the mesh relay station comprises: A short-range wireless module and a long-range wireless module, characterized in that the method includes: The short-range wireless module receives the network registration request sent by the walkie-talkie, and completes the identity verification of the walkie-talkie and registers the network information of the walkie-talkie based on the network registration request. The short-range wireless module receives the registration and handover request sent by the walkie-talkie, and completes the MESH relay station registration and handover of the walkie-talkie based on the registration and handover request; During the movement of the walkie-talkie, the short-range wireless module receives a pre-scanning and pre-registration request initiated by the walkie-talkie for a first candidate MESH relay station, and cooperates to complete the pre-scanning and pre-registration of the first candidate MESH relay station; when the walkie-talkie detects that the signal strength of the target MESH relay station is lower than a preset threshold, it receives a network registration request initiated by the walkie-talkie, and cooperates to complete the network registration of the first candidate MESH relay station; after registration is completed, the connection between the target MESH relay station and the walkie-talkie is disconnected. The short-range wireless module receives pre-registration requests from the walkie-talkie for at least two candidate MESH relay stations, and cooperates to complete identity verification and parameter negotiation without activating the voice channel, maintaining a state awaiting handover. When the signal strength of the target MESH relay station is lower than the handover threshold, the module receives a handover request from the walkie-talkie to select the best candidate MESH relay station from the candidates awaiting handover, and cooperates to complete the handover. The short-range wireless module receives voice data sent by the registered walkie-talkie and transmits the voice data to other walkie-talkies, wherein the other walkie-talkies are walkie-talkies that have registered for network access at the MESH relay station. The system establishes communication connections with other MESH relay stations via a long-range wireless module and transmits the voice data to those other MESH relay stations.

8. The method according to claim 7, characterized in that, The MESH relay station also includes: a long-distance wired module; The method further includes: If the communication connection between the MESH relay station and other MESH relay stations via the long-range wireless module is interrupted or the communication quality is lower than the preset communication quality, then the long-range wired module will be used to communicate with other MESH relay stations via wired communication.

9. The method according to claim 8, characterized in that, The MESH relay station also includes: a main control module; The main control module is used to control the data exchange between the long-range wireless module, the long-range wired module, and the short-range wireless module.

10. A mine mesh group intercom system, characterized in that, The system includes multiple MESH relay stations deployed at fixed locations in the mine, and multiple walkie-talkies that move underground in the mine. The MESH relay station is used to receive network registration requests sent by walkie-talkies, and to complete the identity verification of the walkie-talkies and register their network registration information based on the network registration requests. Receive the registration and switching request sent by the walkie-talkie, and complete the MESH relay station registration and switching of the walkie-talkie based on the registration and switching request; Receive voice data sent by the registered walkie-talkie and transmit the voice data to other communication walkie-talkies; Establish communication connections with other MESH relay stations and transmit the voice data to the other MESH relay stations; The walkie-talkie is used to detect multiple MESH relay stations around the mine and select a target MESH relay station that meets the registration conditions from the multiple MESH relay stations for network registration in order to join the walkie-talkie group; During movement within the mine, based on the communication quality information of the target MESH relay station and surrounding MESH relay stations, the system automatically switches to a new MESH relay station for network registration. During movement, the system continuously monitors the communication quality information of the target MESH relay station and surrounding MESH relay stations. Based on this communication quality information, a first candidate MESH relay station with a score higher than a preset score threshold is selected from the surrounding MESH relay stations, and pre-scanning and pre-registering are performed on this first candidate MESH relay station. When the signal strength of the target MESH relay station is lower than a preset threshold, the first candidate MESH relay station with the highest signal strength is selected for network registration. After registration, the connection with the target MESH relay station is disconnected. Select at least two candidate MESH relay stations that meet the registration conditions from the MESH relay stations around the walkie-talkie, send pre-registration requests to at least two candidate MESH relay stations respectively, complete identity verification and parameter negotiation but do not activate the voice channel, and maintain the waiting-to-switch state; when the signal strength of the target MESH relay station is lower than the switching threshold, select the best one from the candidate MESH relay stations in the waiting-to-switch state to complete the switch. In response to an intercom event, acquire the voice data corresponding to the intercom event, and send the voice data to the currently registered MESH relay station; The process involves detecting multiple MESH relay stations around the mine and selecting a target MESH relay station that meets the registration requirements for network registration, including: Scan the wireless signals transmitted by surrounding MESH relay stations and collect communication quality information, operation status information, and historical connection information of each MESH relay station; Based on the communication quality information, the operating status information, and the historical connection information, candidate MESH relay stations that are online and meet the signal quality standards are selected from the multiple MESH relay stations; Each candidate MESH relay station is weighted and scored, and the candidate MESH relay station with the highest score is determined as the target MESH relay station. After pre-connection verification with the target MESH relay station, security authentication and registration are completed, group configuration is synchronized, and the user is added to the intercom group.

11. A mine mesh group intercom device, applied to walkie-talkies, characterized in that, The device includes: The detection unit is used to detect multiple MESH relay stations around the mine and select a target MESH relay station that meets the registration conditions from the multiple MESH relay stations for network registration in order to join the intercom group; The switching unit is used to automatically switch to a new MESH relay station for network registration during movement within the mine, based on the communication quality information of the target MESH relay station and surrounding MESH relay stations. During movement, it continuously monitors the communication quality information of the target MESH relay station and surrounding MESH relay stations. Based on this communication quality information, it selects a first candidate MESH relay station from the surrounding MESH relay stations with a score higher than a preset score threshold, and pre-scans and pre-registers the first candidate MESH relay station. When the signal strength of the target MESH relay station is low... When the signal strength reaches a preset threshold, the target first candidate MESH relay station with the highest signal strength is selected for network registration. After registration, the connection with the target MESH relay station is disconnected. At least two candidate MESH relay stations that meet the registration conditions are selected from the MESH relay stations around the walkie-talkie. Pre-registration requests are sent to at least two candidate MESH relay stations respectively to complete identity verification and parameter negotiation, but the voice channel is not activated, and the waiting-to-switch state is maintained. When the signal strength of the target MESH relay station is lower than the switching threshold, the best one is selected from the candidate MESH relay stations in the waiting-to-switch state to complete the switch. A sending unit is configured to respond to an intercom event, acquire voice data corresponding to the intercom event, and send the voice data to the currently registered MESH relay station, so that the currently registered MESH relay station can transmit the voice data to other communication intercoms and other MESH relay stations, wherein the other communication intercoms are intercoms that have registered with the currently registered MESH relay station. The process involves detecting multiple MESH relay stations around the mine and selecting a target MESH relay station that meets the registration requirements for network registration, including: Scan the wireless signals transmitted by surrounding MESH relay stations and collect communication quality information, operation status information, and historical connection information of each MESH relay station; Based on the communication quality information, the operating status information, and the historical connection information, candidate MESH relay stations that are online and meet the signal quality standards are selected from the multiple MESH relay stations; Each candidate MESH relay station is weighted and scored, and the candidate MESH relay station with the highest score is determined as the target MESH relay station. After pre-connection verification with the target MESH relay station, security authentication and registration are completed, group configuration is synchronized, and the user is added to the intercom group.

12. An electronic device, characterized in that, The electronic device includes a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the program to implement the MESH group intercom method for mines as described in any one of claims 1 to 9.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a plurality of instructions adapted for loading by a processor to execute the MESH group intercom method for a mine as described in any one of claims 1 to 9.

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