Analog signal interphone and public network interphone converged communication method

Abstract

The invention relates to the technical field of communication, and discloses a converged communication method for an analog signal interphone and a public network interphone, which comprises the following steps of: directly sensing the physical on-off state of a speaking right key of an analog interphone without voice signal encoding and decoding processing so as to generate a binary state signal; according to the method and the device, the state signal is mapped into a public network standardized uplink request signaling which does not bear user data, the public network standardized uplink request signaling is sent to serve as a cross-domain state beacon, and then selection scheduling of heterogeneous communication resources is triggered, so that inherent processing delay and power consumption of signal translation in an existing fusion mode are avoided, and the user experience is improved. In a content-independent lightweight beacon mode, nearly instantaneous state synchronization and efficient resource selection between heterogeneous networks are realized, and the operation reliability and adaptability of the system under complex working conditions are improved.

Description

Technical Field

[0001] The invention relates to a method for integrated communication between an analog signal intercom and a public network intercom, belonging to the technical field of communications. Background Art

[0002] In complex operating environments such as large-scale infrastructure projects or emergency response, to ensure full coverage of communications and effective transmission of instructions, it is often necessary to integrate public network intercom systems with wide-area connectivity capabilities with analog intercom systems that are more penetrating in signal blind spots. Currently, the mainstream technical paths to achieve such integration are centered on the translation of signal content. That is, through gateway equipment, the analog voice signal of one party is fully converted from analog to digital, source encoded and network packaged, and then transmitted to the other party via the public network for decoding and digital-to-analog conversion before playback, and vice versa.

[0003] However, when this content translation-based fusion approach is placed in high-density, time-sensitive operational scenarios, its inherent technical limitations become apparent. The complete signal encoding and decoding and network encapsulation processes inevitably introduce multi-level processing delays. In command and dispatch operations that require multiple interactions across gateways, this cumulative delay often leads to delayed responses to on-site commands and missed critical operational opportunities. At the same time, in order to obtain the most basic channel occupancy status information required for channel selection and allocation decisions, existing methods still require high-energy and continuous digital processing of the complete voice content. This constitutes a significant waste of computing resources and terminal power for resource selection scenarios that only need to determine whether a channel is occupied rather than its content.

[0004] Specifically, the existing technology has the following deficiencies: 1. The processing delay inherent in the multi-level signal encoding and decoding process affects the efficiency and security of cross-network collaboration in scenarios with high real-time requirements; 2. The method of processing all voice content to obtain the channel occupancy status causes fundamental power consumption and computing power redundancy at the resource selection decision-making level; 3. The architecture that relies on complex central gateways for signal translation increases the cost and complexity of system deployment and poses a potential single point failure risk in harsh environments. Therefore, how to abandon the high-cost signal content translation method and create a method based on direct perception of communication intent, which realizes cross-domain resource intelligent selection and collaboration with low latency and low overhead, has become the technical problem to be solved by the present invention. Summary of the Invention

[0005] The present invention provides a method for integrated communication between analog signal intercoms and public network intercoms, the main purpose of which is to solve the problems of principle delay, high power consumption and system complexity caused by reliance on signal content translation in existing integrated communication methods.

[0006] To achieve the above object, the present invention provides a method for integrated communication between an analog signal intercom and a public network intercom, comprising the following steps:

[0007] Step a, a state sensing step, involves directly detecting a level change in the physical circuit of the voice right button of an analog intercom by a hardware comparison circuit directly connected to the physical circuit of the voice right button at the moment the voice right button is pressed, without performing any analog-to-digital conversion or encoding processing of the voice signal, to generate a binary state signal representing the initiation or termination of communication, which is uniquely determined by the level change;

[0008] Step b, a signaling mapping step, in which, in the public network communication module of the intercom, a specific level state representing the initiation of communication in the binary state signal is mapped into a standardized uplink resource scheduling request signaling that does not carry user data and is defined in the physical uplink control channel of the public network communication protocol;

[0009] Step c, a beacon sending step, in which, when the binary status signal indicates that communication has been initiated, the public network communication module is triggered to send a standardized uplink resource scheduling request signaling to the public network side, with the successful sending of the request signaling serving as a cross-domain status beacon indicating that the simulated channel has been occupied;

[0010] Step d, the resource selection step, is where the fusion scheduling platform or intercom terminal on the network side, after detecting the cross-domain status beacon, selects and executes a scheduling strategy based on the communication medium, information processing flow, and network resource allocation method according to the preset resource optimization rules.

[0011] Preferably, in step d, the scheduling strategy executed by the walkie-talkie terminal includes: when the right-to-talk button is pressed, the terminal first determines whether the public network signal coverage strength in which it is located is higher than a preset stable communication threshold; if the judgment result is yes, then the public network voice information protocol is selected to be started for voice transmission, and the analog signal transmitting circuit of the analog signal walkie-talkie is kept in an inactive state, and step c is executed at the same time; if the judgment result is no, then the analog signal transmitting circuit is selected to be started for voice transmission, and step c is executed at the same time.

[0012] Preferably, the hardware comparison circuit in step a is a voltage comparator circuit, whose input end is connected to the physical contact of the voice right button, and is used to detect the voltage step change generated when the physical contact is closed or opened.

[0013] Preferably, between step b and step c, it also includes: a local broadcasting step, in which the walkie-talkie terminal, after generating a binary status signal, locally broadcasts the status signal containing its own unique identity through a second wireless communication module; a status aggregation step, in which a local relay gateway receives and aggregates status signals from one or more walkie-talkie terminals within a preset time window to generate a status terminal list containing the unique identity of all terminals that have initiated communication; and the beacon sending step in step c is executed by the local relay gateway, and the signaling sent by the local relay gateway to the public network side carries the status terminal list.

[0014] Preferably, the local relay gateway also performs the following adaptive channel compensation steps: in its communication idle time slot, periodically transmits a standardized micro-power probe signal, and analyzes the response characteristics of the probe signal to obtain a received signal strength indicator representing the quality of the current local broadcast channel ; When the received signal strength indicator Less than a preset channel health threshold When , a time-frequency diversity compensation mechanism is triggered, which copies the status terminal list into two data packets and sends them repeatedly on two or more preset different frequencies and different time slots.

[0015] Preferably, the following closed-loop feedback calibration step is also included: at the moment the voice button is pressed, a micro-resistance sampling resistor is connected in series with the power supply circuit of the voice button to capture and analyze the startup current transient curve of the power supply circuit of the voice button within a preset microsecond time window; based on the peak current size and the time to reach the peak of the startup current transient curve, the internal resistance state that characterizes the health of the walkie-talkie power supply battery is inverted from a preset mapping relationship stored in the walkie-talkie terminal; and according to the internal resistance state, the reference voltage threshold of the hardware comparison circuit in step a is dynamically adjusted.

[0016] Preferably, in step d, the resource selection performed by the fusion scheduling platform on the network side includes: when the network side does not detect the cross-domain status beacon, keeping the bridging gateway function for recording and network forwarding analog voice signals in a closed state; and activating the bridging gateway function after detecting the cross-domain status beacon.

[0017] Preferably, in the state aggregation step, the local relay gateway also performs a jitter filtering operation before generating the state terminal list, filtering out state signals received within the time window and having a duration shorter than a preset minimum effective call duration from the data to be aggregated.

[0018] Preferably, the method also includes the following steps for accompanying perception of personnel posture: the second wireless communication module of the walkie-talkie terminal continuously receives the periodic synchronization beacon signal broadcast from the local relay gateway during its communication idle period; the walkie-talkie terminal analyzes the carrier frequency of the synchronization beacon signal due to the micro-Doppler effect characteristics generated by the body movement of the person holding the walkie-talkie terminal, and extracts the pattern representing the personnel posture from the time domain variation spectrum of the characteristic by matching it with a preset posture pattern library; and when the pattern matches a preset abnormal fall posture, triggers the sending of a high-priority alarm message.

[0019] Preferably, the second wireless communication module is a narrowband communication module that adopts LoRa or FSK modulation and operates in an authorized exemption frequency band.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention directly detects the on / off state of the voice right button at the physical circuit level to generate a binary status signal, and maps it into standardized uplink resource scheduling request signaling in the public network that does not carry user data. This avoids the complete processing flow of analog-to-digital conversion, encoding, and IP encapsulation of analog voice signals. This change eliminates the inherent processing delays and computing resource consumption of complex codecs in state synchronization between heterogeneous networks, and instead relies solely on the response speed of the physical circuit and the transmission delay of the underlying network signaling. This provides users with a low-latency cross-network collaborative experience in operational scenarios requiring instant responses, and significantly reduces the continuous power consumption of terminal devices.

[0022] 2. The present invention ensures that communication is always carried out on the currently optimal available channel by making an autonomous choice between starting the public network voice information protocol or starting the analog signal transmission circuit on the terminal side according to the public network signal coverage strength in which the terminal is located. Furthermore, by sending the intention of this selection to the network in the form of a unified cross-domain status beacon, the entire communication system, including the network-side platform and other terminal users, can instantly know the channel occupancy status, thereby providing a clear and reliable decision-making basis for subsequent resource scheduling, channel assignment and avoiding communication conflicts, and constructing a distributed, low-cost and intelligent channel selection and management mechanism.

[0023] 3. The present invention further introduces a local relay gateway that adopts narrowband communication technology to perform front-end aggregation and purification on the communication status beacons initiated by multiple terminals in high-density scenarios, and converts the high-concurrency requests that may cause congestion and disorder in the public network signaling channel into an orderly, single and highly reliable data stream for unified reporting. It not only effectively solves the signaling storm bottleneck in large-scale applications, but also integrates the active diagnosis of channel quality and adaptive time-frequency diversity compensation logic based on micro-power probes into the aggregation mechanism, so that the entire status perception link can still maintain a high degree of communication reliability when facing strong electromagnetic interference commonly seen in industrial sites, demonstrating its adaptability under complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A flow chart of a method for integrated communication between an analog signal intercom and a public network intercom according to the present invention;

[0025] Figure 2 This is a performance comparison diagram of the adaptive channel compensation mechanism of the present invention under different channel qualities;

[0026] Figure 3 This is a flow chart of the internal state machine of the fusion communication terminal of the present invention.

[0027] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] The present invention discloses a method for integrated communication between analog signal intercom and public network intercom, which is systematically built on a content-independent lightweight beacon mechanism. The method mainly consists of the following mutually coordinated stages: a physical state perception stage without voice signal encoding and decoding processing; a signaling mapping stage for mapping the physical state into public network standardized signaling; a beacon sending stage for using the signaling as a cross-domain state beacon; and a heterogeneous communication resource selection and scheduling stage triggered by the beacon. In operating environments such as large-scale infrastructure projects or emergency response, a common challenge is that when it is necessary to integrate a public network intercom system with wide-area connectivity with an analog intercom system that is more penetrable in signal blind spots, When the system is integrated, the existing integration method based on signal content translation inevitably introduces processing delays that affect collaborative efficiency and security due to its inherent multi-level signal encoding and decoding process. To meet this challenge, the method provided by the present invention, in the state perception step, uses a hardware comparison circuit directly connected to the physical circuit of the voice button of the analog signal walkie-talkie to directly detect the level state change of the physical circuit at the moment the voice button is pressed to generate a binary state signal representing the initiation or termination of communication that is uniquely determined by the level state change. The hardware comparison circuit can be specifically a voltage comparator circuit, whose input end is connected to the physical contact of the voice button, and is used to detect the voltage generated when the physical contact is closed or opened. Voltage step change; This procedure does not perform any analog-to-digital conversion and encoding processing of the voice signal, but directly converts the physical behavior of the user's communication intention into state information, thereby reducing the delay of state acquisition from the hundreds of milliseconds required for voice signal processing to the nanosecond level of physical circuit response, providing a basis for subsequent instantaneous cross-network collaboration; Accordingly, in the signaling mapping step, the public network communication module of the walkie-talkie maps the specific level state representing the initiation of communication in the binary state signal to a standardized uplink resource scheduling request signaling that does not carry user data and is defined in the physical uplink control channel of the public network communication protocol. A specific implementation method is to map the state to the long-term evolution technology or the fifth-generation mobile communication technology protocol. The defined scheduling request signaling, the SR signaling itself is only a 1-bit resource request identifier, and its transmission overhead is extremely low; then, in the beacon sending step, when the binary status signal indicates that the communication is initiated, the public network communication module is triggered to send a standardized uplink resource scheduling request signaling to the public network side, so that the successful sending of the request signaling serves as a cross-domain status beacon that the simulated channel is occupied; by mapping a pure physical layer state and announcing it using a standardized control signaling, this method constructs a state synchronization mechanism between heterogeneous networks, which no longer relies on high-power and high-latency voice content translation, but instead realizes the cross-domain transmission of the core information of whether the channel is occupied with a lower system resource overhead.

[0030] After detecting the cross-domain status beacon, the system enters the resource selection step. The fusion scheduling platform or the walkie-talkie terminal on the network side selects and executes a scheduling strategy based on the preset resource optimization rules in the communication medium, information processing process and network resource allocation method. For walkie-talkie terminals, a common working condition is that the public network signal coverage strength in which they are located is dynamically changing. In view of this, the scheduling strategy executed by the terminal is configured as a deterministic procedure including redundant path selection. That is, when the right-to-talk button is pressed, the terminal first determines whether the public network signal coverage strength in which it is located is higher than a preset stable communication threshold. The threshold can be determined by offline calibration. For example, the area where the reference signal receiving power is lower than a certain value such as -110dBm is defined as a weak signal area. The specific value constitutes the stable communication threshold. If the judgment result is yes, the public network voice information protocol is selected to be started for voice transmission, and the analog signal transmission circuit of the analog signal walkie-talkie is kept in an inactive state. If the judgment result is no, the system selects to start The analog signal transmission circuit performs voice transmission, and regardless of the selected voice transmission path, the terminal simultaneously executes the beacon transmission step. This dual-path selection and unified beacon transmission mechanism ensures that communication always occurs on the currently optimal channel, while ensuring that the entire system, including the network-side platform and other terminals, has instant information on channel occupancy, providing a reliable decision-making basis for global resource scheduling. For the network-side converged scheduling platform, its resource selection includes: when no cross-domain status beacon is detected, the bridge gateway function used for recording and network forwarding of analog voice signals remains disabled to save computing and storage resources. Only after the cross-domain status beacon is detected does the bridge gateway function be activated to perform on-demand translation and distribution of voice content in the analog channel. This transforms the continuous monitoring and content processing previously required to obtain channel status into an event-driven resource scheduling model precisely triggered by lightweight beacons, significantly reducing the network-side's principle power consumption and computing redundancy.

[0031] Furthermore, in high-density and high-concurrency operation scenarios, a large number of terminals initiate communications at the same time in a short period of time, which may cause congestion in the uplink control channel of the public network, namely, a signaling storm. To meet this challenge, the present invention also provides an enhanced method for front-end aggregation and purification, which includes a local broadcast step and a status aggregation step between the signaling mapping step and the beacon sending step; in the local broadcast step, after generating a binary status signal, the walkie-talkie terminal locally broadcasts the status signal containing its own unique identity through a second wireless communication module, and the second wireless communication module can be a narrowband communication module that uses LoRa or FSK modulation and works in an authorized exemption band. The signal module has the characteristics of low power consumption and simple networking. In the state aggregation step, the local relay gateway receives and aggregates the state signals from one or more walkie-talkie terminals within a preset time window, such as 100 milliseconds, to generate a state terminal list containing the unique identity identifiers of all terminals that have initiated communication. In addition, the beacon sending step is executed by the local relay gateway, and the state terminal list is carried in the signaling sent to the public network side. The front-end aggregation mechanism converts multiple disordered terminal requests that may cause channel congestion into an orderly and single data stream uniformly reported by the local relay gateway, thereby avoiding the risk of signaling storms.

[0032] In order to further improve the reliability of the aggregation mechanism under complex working conditions, the local relay gateway can also perform jitter filtering operations before generating the status terminal list. By setting a preset minimum effective call duration, such as 200 milliseconds, the status signals received within the time window and lasting less than this duration are filtered out from the data to be aggregated to avoid invalid signaling reports caused by users accidentally touching buttons; in addition, when facing strong electromagnetic interference common in industrial sites, the quality of the local broadcast channel may decline. For this reason, the local relay gateway can also perform adaptive channel compensation steps, periodically transmitting a standardized micro-power probe signal in its communication idle time slot, and analyzing the response characteristics of the probe signal to obtain a received signal strength indication that characterizes the current local broadcast channel quality. , when the received signal strength indicator Less than the preset channel health threshold When , a time-frequency diversity compensation mechanism is triggered, which copies the status terminal list into two data packets and sends them repeatedly on two or more preset different frequency points and different time slots; this mechanism enables the status perception link to dynamically adapt to harsh electromagnetic environments and ensure the reliability of communication.

[0033] The present invention also realizes closed-loop feedback calibration of the system's own state by deeply exploring the characteristics of the terminal's internal circuit. As the terminal battery ages or consumes power, its voltage instability may cause the judgment threshold of the hardware comparison circuit to drift. To eliminate this hidden danger, the method also includes a closed-loop feedback calibration step. At the moment the voice button is pressed, a micro-resistance sampling resistor is connected in series with the power supply circuit of the voice button to capture and analyze the startup current transient curve of the power supply circuit of the voice button within a preset microsecond time window. Based on the peak current size and the time to reach the peak of the startup current transient curve, the internal resistance state that characterizes the health of the walkie-talkie power supply battery is inverted from a preset mapping relationship calibrated by offline experiments and stored in the walkie-talkie terminal. According to the internal resistance state, the reference voltage threshold of the hardware comparison circuit in the state sensing step is dynamically adjusted. This closed-loop calibration procedure enables the core state input judgment, It can resist measurement deviations introduced by changes in power supply status and ensure the reliability of judgment throughout the life cycle of the equipment. In the absence of conflicts, the present invention can also reuse the second wireless communication module to achieve value-added functions, such as for accompanying perception of personnel posture. The second wireless communication module of the walkie-talkie terminal continuously receives periodic synchronization beacon signals broadcast from the local relay gateway during its communication idle period, and analyzes the micro-Doppler effect characteristics of the carrier frequency of the synchronization beacon signal due to the physical activities of the person holding the walkie-talkie terminal. Then, from the time domain change spectrum of the characteristics, by matching with a preset posture pattern library constructed by a standard action sample library, the pattern representing the posture of the person is extracted, and when the pattern matches the preset abnormal fall posture, a high-priority alarm message is triggered. The method expands the communication equipment into an operating terminal with both communication and safety warning capabilities without adding additional hardware sensors.

[0034] Example 1: In the deployment of a tunnel excavation operation, its hybrid communication environment includes a command center located at the tunnel entrance with stable public network signal coverage, a mechanical operation team in the middle of the tunnel with good public network signal coverage, and a geological exploration team at the tunnel excavation face with weak public network signal coverage at the edge; when the geological exploration team identifies a high-risk geological structure anomaly in front of the excavation face through drilling data and needs to immediately notify the mechanical operation team behind to stop excavation, the team leader presses the voice button of the walkie-talkie he is holding; at the moment the voice button is pressed, the hardware comparison circuit inside the walkie-talkie generates a binary status signal indicating that the communication is initiated. At the same time, the public network communication module of the terminal judges the strength of the public network signal coverage based on its own judgment. Based on the conclusion that the signal level is lower than the preset stable communication threshold, the analog signal transmission circuit is activated to broadcast the user's voice command, and at the same time, the binary status signal is mapped into a standardized uplink resource scheduling request signaling, which is sent to the network side through the weak but still available public network uplink control channel. The sending of this request signaling constitutes a cross-domain status beacon indicating that the analog channel is occupied. Here, the terminal's autonomous path selection mechanism and the cross-domain status beacon sending mechanism form a synergy. That is, regardless of whether the terminal chooses public network voice due to good signal or analog voice due to poor signal, its intention to initiate communication is instantly broadcast to the entire network in the form of a unified beacon, which solves the fundamental delay contradiction in traditional converged solutions that requires waiting for the gateway to complete voice content translation before knowing the remote channel status.

[0035] After detecting the cross-domain status beacon, the network-side converged scheduling platform instantly learned the geological exploration team's communication status without waiting for the analog voice signal to be received and decoded. It then pushed a high-priority control command to all terminals of the mechanical operation team covered by the public network. This command displayed an analog channel occupied alarm on the receiving terminal interface, prompting the mechanical operators to suspend operations and monitor communication status. Seconds later, the voice command from the geological exploration team to stop excavation, translated by the bridging gateway function activated by the converged scheduling platform, was delivered via the public network, confirming the alarm status. This process breaks down the traditional single process of converged communication, which first understands the content and then decides on the action, into a dual-channel process in which status information precedes content information. By transmitting status information much faster than content information, risk response is no longer constrained by the delay of cross-network voice transcoding.

[0036] If, in an emergency, multiple members of a geological exploration team simultaneously press the right-to-talk button to make a call, the second wireless communication module built into the intercom terminal will locally broadcast the status signal containing each member's unique identity identifier, and the local relay gateway deployed near the team will perform status aggregation and jitter filtering within a preset time window, and report the generated status terminal list in a one-time unified manner through its own public network communication module; this status aggregation mechanism is combined with the beacon sending mechanism to aggregate multiple concurrent status signaling into a single signaling report, resolving the contradiction between the impact of large-scale terminal concurrent communication on the public network signaling channel capacity and the overall reliability of the system; at the same time, if the electromagnetic interference generated by the operation of large-scale equipment in the tunnel causes the local relay gateway to diagnose that the quality of its local broadcast channel is lower than the preset channel health threshold The adaptive channel compensation step it performs will repeatedly send the status terminal list through time-frequency diversity. The coordination of this compensation mechanism and the status aggregation mechanism provides another layer of reliability guarantee for the entire status perception link in a complex electromagnetic environment. Finally, based on the status alarm received in advance, the mechanical operation team stopped the excavation operation before the voice command arrived. The communication intention of the geological exploration team was synchronized across heterogeneous networks in a manner close to the response speed of physical circuits. The communication status of the entire operating environment remains transparent to the command center. Through the inherent coordination of multiple mechanisms, the system maintains low latency and high reliability of command transmission in a dynamically changing signal environment and complex electromagnetic working conditions.

[0037] Example 2: In order to objectively verify the changes in core performance indicators of the method of the present invention compared with the traditional signal translation scheme in heterogeneous network converged communication, this comparative experiment was set up. The experimental platform consists of a programmable commercial-grade LTE network simulator, a power analyzer for accurately recording terminal power consumption, a high-precision time synchronization server and 50 converged communication terminals integrated with the method of the present invention. In addition, 50 terminals using traditional voice signal encoding and decoding and IP encapsulation technology were set as a control group. The experimental environment can reproduce various working conditions from the central stable coverage area to the edge weak signal area by adjusting the parameters of the LTE network simulator; in the experiment, the state aggregation time window parameters of the local relay gateway are set. The setting of this parameter needs to strike a balance between ensuring the integrity of capturing a group of concurrent requests and minimizing the additional delay introduced by the aggregation process. Its value is mainly affected by the group users pressing the right-to-talk button after receiving the instruction. To cover the behavioral patterns of most users, the time window is set to 100 milliseconds. This value is based on research on the statistical model of standard human reaction time distribution and is intended to capture the vast majority of concurrent actions within one standard deviation. All terminals are calibrated to the same time base through a time synchronization server to ensure the accuracy of end-to-end delay calculation. The experimental process is divided into three phases. First, in a single-user scenario, the test terminal and the control terminal are respectively instructed to initiate a cross-network communication, and their end-to-end state synchronization delay and terminal single synchronization power consumption are recorded. Then, in a high-density scenario, communication commands are simultaneously initiated to 10 terminals to simulate team-level collaborative work. Finally, in an ultra-high-density scenario, communication commands are simultaneously initiated to all 50 terminals to simulate the signaling storm conditions in the early stages of emergency response. The success rate of reporting status beacons or equivalent information in the last two phases is recorded. The experimental data is shown in Table 1.

[0038] Table 1 is a performance comparison data table of the method of the present invention and the control group method under different working conditions.

[0039]

[0040] As shown in Table 1, under single-terminal conditions, the end-to-end state synchronization delay and terminal power consumption of the proposed method are both reduced by more than an order of magnitude compared to the control method. This is because the proposed method directly senses the physical on / off state of the voice button through a hardware comparison circuit and maps it into a lightweight cross-domain state beacon. This process avoids the extensive computational processing and time consumption required for analog-to-digital conversion, source coding, and network packetization of the complete voice signal in the control method. When entering high-density concurrency scenarios, the proposed method's request success rate remains high and latency increases slowly. This is due to its front-end aggregation mechanism, in which the local relay gateway aggregates the local broadcast status signals of multiple terminals before reporting them to the public network. This mechanism effectively suppresses signaling collisions caused by a large number of terminals competing for the uplink channel at the same time. The control method, lacking this mechanism, experiences a significant drop in request success rate under high-density conditions, and its latency also degrades sharply due to numerous random backoffs and retransmissions.

[0041] Example 3: This example combines Figures 1 to 3 , a method for realizing the integrated communication between analog signal intercom and public network intercom is described, such as Figure 1As shown, the process starts with the initial action of the user in the upper left corner pressing the right-to-talk button. This action directly triggers the core state perception step, that is, directly detecting the level state change of the physical circuit through the hardware comparison circuit to generate a binary state signal. On the other hand, it synchronously triggers the closed-loop feedback calibration step, which inverts the battery internal resistance state by capturing the startup current transient curve, and dynamically adjusts the reference voltage threshold to ensure the reliability of the core state perception; the generated binary state signal then enters the signaling mapping step, and is mapped into a standardized uplink resource scheduling request signaling that does not carry user data. Then, in the beacon sending step, the sending of this request signaling is used as a cross-domain state beacon to simulate that the channel has been occupied. After the beacon is sent, it will trigger two parallel resource selection processes in parallel. One is the resource selection step (terminal), in which the terminal selects the resource based on the strength of the public network signal. degree, autonomously choose to start public network or analog voice transmission, the second is the resource selection step (network), after the network side platform detects the beacon, activates the bridging gateway function, and translates and distributes the analog voice on demand; in addition, for high concurrency scenarios, the present invention also provides an enhanced path, after the state perception step, the local broadcast step can be executed first, that is, the state signal containing its own ID is broadcasted through the second wireless module, and then the local gateway executes the state aggregation step, receives and aggregates the state signals of multiple terminals, performs jitter filtering, and generates a state terminal list. Finally, the gateway executes the beacon sending step (gateway) to uniformly report the signaling carrying the state terminal list to avoid signaling storms. This aggregated state beacon can also trigger resource selection on the network side, thus forming a complete, closed-loop fusion communication method that takes into account both conventional and high concurrency scenarios.

[0042] like Figure 2 As shown in the figure, the horizontal axis is the RSSI signal strength (dBm), which represents channel quality, and the vertical axis is the communication success rate (%). The figure contains two curves. The dotted line connected by hollow circles represents the performance when the compensation mechanism is not enabled, while the solid line connected by solid triangles represents the performance when the compensation mechanism is enabled. When the signal strength is good (for example, greater than -75dBm), the communication success rate in both modes is close to 100%. However, as the signal strength RSSI continues to weaken, the communication success rate without the compensation mechanism begins to drop sharply after -80dBm, falling below 50% at -100dBm. In sharp contrast, the curve with the compensation mechanism enabled maintains an extremely high communication success rate throughout the entire RSSI range. Even under poor signal conditions of -100dBm, the success rate remains close to 90%. This fully demonstrates that the compensation mechanism can significantly improve the reliability of status information exchange in weak signal or strong interference environments.

[0043] like Figure 3As shown, the process starts in the idle state. When the user presses the right-to-talk button and starts the closed-loop feedback calibration at the same time, the terminal enters the state judgment. In this state, the terminal will select a path based on a core judgment condition. If the public network signal is greater than the stable communication threshold, the terminal will start the public network voice protocol and send a beacon, entering the public network transmission state. If the judgment result is that the public network signal is less than or equal to the stable communication threshold, the terminal will start the analog transmission circuit and send a beacon, entering the analog transmission state. Regardless of whether it is the public network transmission state or the analog transmission state, the terminal will return to the idle state after the user releases the right-to-talk button. In addition, the flowchart also reveals the terminal's passive response mode. That is, in the idle state, if a high-priority command is received from the network side, the terminal will enter the alarm reception state and will not return to the idle state until the alarm ends, demonstrating the autonomous behavior logic of the terminal as an intelligent decision-making node.

[0044] Example 4: When a two-way radio that has been used for a long time and whose power supply battery has increased in internal resistance due to aging is deployed in a low-temperature operating environment that causes the battery's electrochemical activity to decrease, when the voice button is pressed, the voltage drop in the power supply circuit will be more significant than at room temperature and with new batteries. This poses a challenge: a fixed reference voltage threshold of the hardware comparison circuit used to determine whether the button is closed may not be effectively triggered by the circuit voltage after the drop, resulting in missed communication initiation. To address this challenge, the closed-loop feedback calibration step is configured to include an offline parameter calibration procedure and an online dynamic adjustment procedure. In the offline calibration procedure, its initial state is to equip a two-way radio terminal with a standard battery with known internal resistance and voltage characteristics for calibration, as well as an external data acquisition device capable of high-frequency current sampling and a programmable precision DC power supply. The procedure first simulates various typical battery aging and low-temperature conditions using the DC power supply, namely by setting different output voltages and connecting a variable resistor in series to simulate different battery internal resistances. In each simulation state, the voice button is triggered multiple times, and the data acquisition device captures and records the complete startup current transient curve through the micro-resistance sampling resistor connected in series with the intercom power supply circuit. At the same time, two key features are extracted from each curve: peak current The time to peak , the collected multiple groups , , Data points, through multiple linear regression analysis, an inversion model for characterizing the internal resistance state of the battery is established, and a simplified linear model is established as ,in, is the estimated value of the internal resistance, and the coefficient These are calibration constants derived from regression analysis and stored in the terminal firmware.

[0045] Accordingly, the online dynamic adjustment procedure is executed in the daily use of the terminal. Every time the user presses the right-to-talk button, the terminal's microcontroller is immediately triggered, and its built-in analog-to-digital converter performs intensive sampling of the voltage across the micro-resistance sampling resistor in a short window with a time resolution of microseconds, thereby reconstructing the startup current transient curve inside the terminal and calculating the current from the curve in real time. and Then, the MCU substitutes these two real-time characteristic values ​​into the inversion model obtained in the above offline calibration stage to calculate the estimated value of the current battery internal resistance state. Next, the MCU dynamically adjusts the reference voltage threshold of the hardware comparison circuit based on the estimated internal resistance state. This adjustment logic follows a principle: the lower the battery health, the reference voltage threshold should be appropriately lowered to compensate for the voltage sag. The adjustment relationship follows a preset linear function that is also determined in the offline calibration phase. ,in and Represent the reference voltage and internal resistance of the ideal new battery state, and is a positive adjustment coefficient; thus, even in a low-temperature environment, when the terminal user with an aging battery presses the voice button, the power supply circuit will experience a significant voltage drop. However, since the MCU has passed the above regulations and based on the transient analysis of the key startup current, It is adjusted to a lower level that adapts to the current battery status, so that the circuit level after the key contact is closed can still cross the dynamically adjusted threshold, thereby generating a valid binary status signal. Subsequent cross-domain status beacons can be sent normally, and the establishment of the communication link is not affected by the combined effects of battery aging and low temperature environment.

[0046] Example 5: In order to ensure the recognition accuracy of the personnel posture accompanying perception function under different individuals and diversified actions, an offline calibration and data filling procedure of a posture pattern library is executed before the system is deployed. The procedure recruits test personnel with different height and weight characteristics, wears the walkie-talkie terminal of the present invention in a controlled environment, and performs a series of standard actions according to a predetermined script. The series of actions covers daily activities such as normal walking, going up and down stairs, fast running, squatting and standing up, as well as simulated falling actions in various postures such as forward, backward and sideways, and also includes high-acceleration non-falling actions such as jumping and rapid arm swinging; in this process, the system synchronously records the carrier frequency micro-Doppler effect characteristics of the periodic synchronization beacon signal carried by the local relay gateway caused by each action, and associates these feature data with known action labels. After data enhancement and feature extraction, it is used to fill or train the preset posture pattern library, so that the pattern library has the ability to distinguish between real abnormal falling postures and other violent similar actions.

[0047] To make the channel health threshold in the adaptive channel compensation step It can accurately match the electromagnetic environment of a specific work site. When the local relay gateway is first deployed in a new scene, a pre-deployment calibration procedure is performed. In this procedure, the technician first places the local relay gateway in the center or predetermined location of the work area, and then moves a reference terminal along a path covering the entire predetermined communication range. The reference terminal continuously receives and records the received signal strength indication of the standardized micro-power probe signal periodically transmitted from the local relay gateway. At the same time, a spectrum analyzer was used to measure the background electromagnetic noise intensity of the work site in the corresponding frequency band on the same path, and the background electromagnetic noise intensity at different locations was compared and analyzed. The difference between the value and the background noise floor intensity, and finally the specific scene It is set to a value that adds a predetermined difference to the measured maximum background noise floor intensity to ensure that the triggering of the time-frequency diversity compensation mechanism is based on an effective judgment of the actual channel quality deterioration rather than a misjudgment of normal environmental noise.

[0048] Example 6: To avoid the impact of manufacturing tolerances of components from different batches on the consistency of system performance, a standardized pre-delivery self-calibration and parameter curing procedure is implemented after the final assembly of each converged communication terminal. In this procedure, the terminal is placed in an automated testing platform that integrates a precision manipulator and a power control unit. The platform first performs several complete charge and discharge cycles on the terminal to avoid the initial effect of a new battery. Subsequently, the manipulator repeatedly triggers the voice button with a preset combination of different pressures, speeds, and contact durations. The terminal then synchronously records the duration of the circuit level generated by each trigger and Based on these statistical data, a minimum effective call duration that is adapted to the mechanical and electrical characteristics of this specific terminal is calculated and solidified for the jitter filtering operation in the subsequent state aggregation step; after completing the button calibration, the test platform places the terminal's battery in several standardized power states and drives the terminal to perform an instantaneous high-current discharge in each state. By synchronously recording the startup current transient curve and the actual battery state parameters, the coefficients in the inversion model and adjustment function in the closed-loop feedback calibration step are fine-tuned to generate a set of calibration coefficients unique to this terminal and write them into the terminal's non-volatile memory.

[0049] In order to ensure the communication reliability of the system when the key infrastructure fails, the firmware of the fusion communication terminal integrates a set of online link fault tolerance and mode switching logic based on heartbeat monitoring. The local relay gateway is configured to transmit a standardized and low-power heartbeat beacon signal on the local broadcast channel at a fixed period during its communication idle time slot. Each terminal continuously monitors this heartbeat beacon in the background and maintains a heartbeat loss counter. When the accumulated count value of the heartbeat loss counter of the terminal reaches a preset fault tolerance limit within a continuous period, the logic controller of the terminal will judge It determines that the local relay gateway is offline or unreachable, and automatically switches its communication mode from the default aggregation mode of reporting status via local broadcast to a backup direct beacon sending mode. In this backup mode, when the user presses the voice button, the terminal will no longer attempt to broadcast locally through the second wireless communication module, but directly trigger its public network communication module to send standardized uplink resource scheduling request signaling to the public network side; subsequently, if the terminal receives the heartbeat beacon signal stably again, it will automatically switch back to the aggregation mode to restore the system's communication efficiency in high-density scenarios.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for integrating communication between an analog signal intercom and a public network intercom, characterized in that: The following steps are involved: Step a, a state sensing step, involves directly detecting a level change in the physical circuit of the voice right button of an analog intercom by a hardware comparison circuit directly connected to the physical circuit of the voice right button at the moment the voice right button is pressed, without performing any analog-to-digital conversion or encoding processing of the voice signal, to generate a binary state signal representing the initiation or termination of communication, which is uniquely determined by the level change; Step b, a signaling mapping step, in which, in the public network communication module of the intercom, a specific level state representing the initiation of communication in the binary state signal is mapped into a standardized uplink resource scheduling request signaling that does not carry user data and is defined in the physical uplink control channel of the public network communication protocol; Step c, a beacon sending step, in which, when the binary status signal indicates that communication has been initiated, the public network communication module is triggered to send a standardized uplink resource scheduling request signaling to the public network side, with the successful sending of the request signaling serving as a cross-domain status beacon indicating that the simulated channel has been occupied; Step d, the resource selection step, is where the fusion scheduling platform or intercom terminal on the network side, after detecting the cross-domain status beacon, selects and executes a scheduling strategy based on the communication medium, information processing flow, and network resource allocation method according to the preset resource optimization rules.

2. The method for integrating communication between an analog signal intercom and a public network intercom according to claim 1, characterized in that: In step d, the scheduling strategy executed by the walkie-talkie terminal includes: when the right-to-talk button is pressed, the terminal first determines whether the public network signal coverage strength in which it is located is higher than a preset stable communication threshold; if the judgment result is yes, it chooses to start the public network voice information protocol for voice transmission, and keeps the analog signal transmission circuit of the analog signal walkie-talkie in an inactive state, and executes step c at the same time; if the judgment result is no, it chooses to start the analog signal transmission circuit for voice transmission, and executes step c at the same time.

3. The method for integrating communication between an analog signal intercom and a public network intercom according to claim 1, characterized in that: The hardware comparison circuit in step a is a voltage comparator circuit, whose input end is connected to the physical contact of the voice right button and is used to detect the voltage step change generated when the physical contact is closed or opened.

4. The method for integrating communication between an analog signal intercom and a public network intercom according to claim 1, characterized in that: Between step b and step c, it also includes: a local broadcasting step, in which the walkie-talkie terminal, after generating a binary status signal, locally broadcasts the status signal containing its own unique identity through a second wireless communication module; a status aggregation step, in which a local relay gateway receives and aggregates status signals from one or more walkie-talkie terminals within a preset time window to generate a status terminal list containing the unique identity of all terminals that have initiated communication; and the beacon sending step in step c is executed by the local relay gateway, and the signaling it sends to the public network side carries the status terminal list.

5. The method for integrated communication between an analog signal intercom and a public network intercom according to claim 4, characterized in that: The local relay gateway also performs the following adaptive channel compensation steps: in its communication idle time slot, it periodically transmits a standardized micro-power probe signal and analyzes the response characteristics of the probe signal to obtain the received signal strength indicator that characterizes the quality of the current local broadcast channel. ; When the received signal strength indicator Less than a preset channel health threshold When , a time-frequency diversity compensation mechanism is triggered, which copies the status terminal list into two data packets and sends them repeatedly on two or more preset different frequencies and different time slots.

6. The method for integrated communication between an analog signal intercom and a public network intercom according to claim 1, characterized in that: The method also includes the following closed-loop feedback calibration steps: at the moment the voice button is pressed, a micro-resistance sampling resistor connected in series with the power supply circuit of the voice button is used to capture and analyze the startup current transient curve of the power supply circuit of the voice button within a preset microsecond time window; based on the peak current size and the time when the peak value is reached of the startup current transient curve, the internal resistance state representing the health of the walkie-talkie power supply battery is inverted from a preset mapping relationship stored in the walkie-talkie terminal; and according to the internal resistance state, the reference voltage threshold of the hardware comparison circuit in step a is dynamically adjusted.

7. The method for integrating communication between an analog signal intercom and a public network intercom according to claim 1, characterized in that: In step d, the resource selection performed by the fusion scheduling platform on the network side includes: when the network side does not detect the cross-domain status beacon, keeping the bridging gateway function used for recording and network forwarding of analog voice signals in a closed state; and activating the bridging gateway function after detecting the cross-domain status beacon.

8. The method for integrated communication between an analog signal intercom and a public network intercom according to claim 4, characterized in that: In the state aggregation step, before generating the state terminal list, the local trunk gateway also performs a jitter filtering operation to filter out state signals received within the time window and having a duration shorter than a preset minimum effective call duration from the data to be aggregated.

9. The method for integrated communication between analog signal intercom and public network intercom according to claim 4, characterized in that: It also includes the following method steps for accompanying perception of human posture: the second wireless communication module of the walkie-talkie terminal continuously receives the periodic synchronization beacon signal broadcast from the local relay gateway during its communication idle period; the walkie-talkie terminal analyzes the micro-Doppler effect characteristics of the carrier frequency of the synchronization beacon signal due to the physical activity of the person holding the walkie-talkie terminal, and extracts the pattern representing the person's posture from the time domain variation spectrum of the characteristic by matching it with a preset posture pattern library; and when the pattern matches a preset abnormal fall posture, triggers the sending of a high-priority alarm message.

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