Interphone flat-emergency dual-purpose dual-mode parallel communication method

Abstract

The invention relates to the related field of a peacetime and urgency dual-purpose communication technology, in particular to an interphone peacetime and urgency dual-purpose dual-mode parallel communication method. According to the invention, dual-mode parallel communication is carried out through a private network emergency channel and short message communication of a Beidou satellite communication system, the two modes operate independently and do not interfere with each other, when one communication mode is limited, the other communication mode can continue to work, parallel transmission of voice and data is realized, the problem that single communication fails in a complex environment is effectively solved, and the communication efficiency is improved. The continuity and reliability of communication in an emergency scene are ensured, key information is ensured not to be lost, and the development of emergency rescue work is facilitated.

Description

Technical Field

[0001] This invention relates to the field of dual-mode communication technology for both normal and emergency use, and in particular to a method for dual-mode parallel communication of a walkie-talkie for both normal and emergency use. Background Technology

[0002] Emergency communication equipment refers to specialized communication equipment used to ensure emergency command, rescue coordination, and information transmission in sudden emergency scenarios such as natural disasters, accidents, public health emergencies, and social security incidents, or when conventional communication networks fail due to damage, interference, or congestion. Its core objective is to ensure the stable transmission of critical information in extreme or complex environments, thereby supporting the efficient conduct of emergency response and handling work.

[0003] Existing emergency communication equipment still has the following shortcomings: 1. Walkie-talkies are common emergency communication devices, but most traditional emergency walkie-talkies only support private network frequency bands, which are prone to failure when obstructed by buildings or subject to electromagnetic interference, which may affect the implementation of emergency rescue work. 2. Although independent Beidou communication equipment can achieve long-distance communication in environments without dedicated network communication signals, such equipment is usually large and heavy, with poor portability. Furthermore, since walkie-talkies are commonly used portable communication tools, there are strict limitations on their size and weight. Independent Beidou equipment is difficult to be compatible with the portability requirements of walkie-talkies, which increases the burden of carrying communication equipment and reduces the convenience of operating communication equipment. 3. Furthermore, most existing communication devices do not have an intelligent mechanism to dynamically select the optimal communication path based on the communication environment. When the communication environment changes, users need to manually switch the communication mode, which is not only cumbersome but also prone to communication interruption during the switching process. This makes it difficult for communication devices to meet the requirements for real-time and reliable communication in emergency scenarios. Summary of the Invention

[0004] Therefore, in order to overcome the above-mentioned shortcomings, the present invention provides a method for dual-mode parallel communication of walkie-talkies for both normal and emergency use, so as to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a method for dual-mode parallel communication of a walkie-talkie for both normal and emergency use, comprising the following steps: S1. Dual-mode parallel trigger detection: When an emergency trigger operation by a user is detected, the system simultaneously starts the first communication mode and the second communication mode. The first communication mode is voice transmission based on walkie-talkie wireless communication, used to transmit user voice information on the walkie-talkie private network channel. The second communication mode is short message communication based on the Beidou satellite communication system, used to send emergency messages containing positioning information and / or time information to the satellite network. S2. Parallel Communication Execution: Both the first and second communication modes operate independently without interfering with each other, enabling parallel transmission of voice and data. S3. Perform channel quality assessment: During the operation of the first communication mode, acquire and assess the channel quality parameters of the walkie-talkie wireless communication network in real time. S4. Intelligent Channel Switching: When the channel quality parameters meet the preset switching conditions, the system automatically adjusts the communication strategy to enhance the priority or dominance of the second communication mode in emergency information transmission. S5. Hardware integration: The walkie-talkie integrates a satellite communication module. This module shares or works in conjunction with the walkie-talkie's radio frequency circuit to achieve integrated private network communication and satellite communication functions.

[0006] Preferably, the emergency triggering operation is triggered by pressing and holding the SOS button, using a combination of buttons, or by a voice command.

[0007] Preferably, the first communication mode uses a private network radio frequency band or other walkie-talkie wireless communication protocols.

[0008] Preferably, the second communication mode uses the RDSS short message service of the BeiDou satellite navigation system or other two-way satellite communication services.

[0009] Preferably, the emergency message adopts a compressed encoding format to reduce the message length and adapt to the transmission limitations of satellite short messages.

[0010] Preferably, the compression encoding format is B-Code format, used to perform binary compression of latitude, longitude and timestamp, and the compression encoding also includes CRC-16 checksum for verifying message integrity.

[0011] Preferably, the channel quality parameters include signal-to-noise ratio and / or received signal strength indication.

[0012] Preferably, the preset switching condition is: the signal-to-noise ratio is lower than the first threshold multiple times consecutively, or the received signal strength indication is lower than the second threshold.

[0013] Preferably, the first threshold is 15dB, and the sampling is repeated 3 times, with a sampling period of 100ms.

[0014] Preferably, the satellite communication module is integrated onto the walkie-talkie's circuit board using surface mount technology, and its size does not exceed 20×20mm. It shares an antenna with the radio frequency circuit via an antenna switcher.

[0015] The beneficial effects of this invention are: 1. This invention enables dual-mode parallel communication between a dedicated network emergency channel and the BeiDou satellite communication system via short message communication. The two modes operate independently without interference. When one communication mode is restricted, the other can continue to work, achieving parallel transmission of voice and data. This effectively solves the problem of single communication failing in complex environments, ensuring the continuity and reliability of communication in emergency scenarios, ensuring that critical information is not lost, and facilitating the conduct of emergency rescue work.

[0016] 2. This invention uses a miniature Beidou RDSS module with a size not exceeding 20×20mm, which is directly integrated onto the walkie-talkie PCB through stamp-hole patch welding. This eliminates the need to increase the size and weight of the device. Compared with a standalone Beidou terminal, the size, weight, and carrying burden are significantly reduced, ensuring that the walkie-talkie maintains good portability and also increasing the ease of operation of the communication equipment.

[0017] 3. This invention introduces a channel quality assessment and monitoring mechanism and an intelligent channel switching mechanism. When the private network channel of the walkie-talkie deteriorates, the priority of the Beidou mode is automatically increased without the need for manual operation by the user, reducing operational complexity and improving the system's adaptability to environmental changes. This ensures that communication is always in the optimal state, enabling communication equipment to better meet the requirements of real-time communication and reliability in emergency scenarios. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the process structure of the present invention. Detailed Implementation

[0019] To further explain the technical solution of the present invention, a detailed description is provided below through specific embodiments.

[0020] like Figure 1 As shown, this invention provides a method for dual-mode parallel communication of a walkie-talkie for both normal and emergency use, comprising the following steps: S1. Dual-mode parallel trigger detection: When an emergency trigger operation by a user is detected, the system simultaneously starts the first communication mode and the second communication mode. The first communication mode is voice transmission based on walkie-talkie wireless communication, used to transmit user voice information on the walkie-talkie private network channel. The second communication mode is short message communication based on the Beidou satellite communication system, used to send emergency messages containing positioning information and / or time information to the satellite network. When a user presses and holds the SOS button for more than 2 seconds in an emergency, the system determines it as an emergency trigger operation. At this time, the walkie-talkie's control chip starts dual-thread processing: First communication mode: The user's voice is collected through the microphone, with a sampling rate of 8kHz and quantization of 16bit. After modulation, it is transmitted through the antenna in the PMR446 band to realize the voice distress call. Second communication mode: At the same time, the system obtains the current positioning information (WGS-84 coordinate system) and timestamp, initiates the BeiDou short message packet assembly process, and sends emergency information containing latitude, longitude and time to the BeiDou satellite network; S2. Parallel Communication Execution: Both the first and second communication modes operate independently without interfering with each other, enabling parallel transmission of voice and data. The two communication threads are scheduled by the walkie-talkie control chip, each occupying independent memory space and interrupt resources. Voice acquisition and message packet assembly are executed separately and do not block each other, ensuring that even if one link is interrupted in a complex environment, the other can still independently complete the information transmission, so that critical information is not lost. S3. Perform channel quality assessment: During the operation of the first communication mode, acquire and assess the channel quality parameters of the walkie-talkie wireless communication network in real time. Specifically, during walkie-talkie private network channel communication, the system continuously monitors the wireless link status: The signal-to-noise ratio (SNR) value is collected every 100 milliseconds via the radio frequency chip, and the received signal strength indication (RSSI) is acquired simultaneously as an auxiliary evaluation indicator. Furthermore, to eliminate measurement fluctuations caused by transient interference, the system uses a sliding window of length 10 to filter the SNR data, thereby improving the stability and accuracy of channel assessment. S4. Intelligent Channel Switching: When the channel quality parameters meet the preset switching conditions, the system automatically adjusts the communication strategy to enhance the priority or dominance of the second communication mode in emergency information transmission, ensuring that critical information can still be reliably transmitted even when the performance of the walkie-talkie wireless communication network deteriorates. The system achieves dynamic awareness of the communication environment by monitoring channel quality parameters in real time. When a continuous deterioration in link quality is detected, it automatically triggers an adjustment of the communication strategy. Specific switching conditions include: Switching condition 1: The SNR sample value is below 15dB for 3 consecutive times; Switching condition two: RSSI remains below -100dBm; When any condition is met, the system prioritizes the transmission of BeiDou short messages and can automatically retransmit messages to ensure that emergency information arrives accurately. To further improve the accuracy of channel judgment, the system can also adopt a two-parameter comprehensive scoring mechanism that combines signal strength with spatial geometric factors for evaluation. This mechanism first normalizes RSSI and satellite elevation angle to convert them into a score with unified dimensions. The RSSI scoring formula is: (RSSI+110) / 50×100 (mapping -110 dBm to -60 dBm to 0 to 100 points). The formula for scoring elevation angle is: (elevation angle − 10) / 80 × 100 (the effective elevation angle range is 10° to 90°, and angles below 10° are considered unreliable). Based on this, the comprehensive score is calculated by weighted summation. The calculation model can be implemented through an embedded program, and the program code is as follows: Python def channel_score(rssi, elevation); w_rssi, w_el = 0.6, 0.4 # Weight allocation rssi_score = max(0, min(100, (rssi + 110) / 50 * 100)) el_score = 0 if elevation < 10 else max(0, min(100, (elevation -10) / 80 * 100)) return w_rssi * rssi_score + w_el * el_score When the overall score is consistently below 20 points, the system will also trigger a communication strategy adjustment, prioritizing the use of satellite communication links to achieve smarter and more robust emergency communication support. S5. Hardware integration: The walkie-talkie integrates a satellite communication module. This module shares or works in conjunction with the walkie-talkie's radio frequency circuit to achieve integrated private network communication and satellite communication functions. The Beidou RDSS module (supporting short messages and positioning) is integrated onto the main control board on the top of the walkie-talkie via a stamp-hole patch welding method. It measures 18×18mm. The module communicates with the main control chip and shares the antenna with the existing RF circuit through an antenna switcher. The switcher selects the antenna path according to the communication mode, avoiding the need to add extra antennas and achieving a miniaturized design. In this embodiment, the emergency message adopts a compressed encoding format to reduce the message length and adapt to the transmission limitations of satellite short messages; The compression encoding format is B-Code format, which is used to perform binary compression of latitude, longitude and timestamp, and the compression encoding also includes CRC-16 check code, which is used to verify the integrity of the message. Specifically, the B-Code encoding scheme uses a compact representation of key fields, with longitude using 14-bit binary two's complement encoding with a resolution of 0.0001°; latitude using 13-bit binary two's complement encoding with a resolution of 0.0001°; and timestamps using 6-byte BCD code in the format YYMMDDHHMMSS, accurate to the second. The above fields occupy a total of 75 bits (9.375 bytes), which is far less than the capacity limit of 78 bytes per frame for BeiDou short messages. On this basis, the system reserves 7 bits for function expansion and adds a 16-bit CRC-16 check code to form a complete data frame structure. The encoded message is encapsulated by the main control chip and sent by the satellite communication module.

[0021] This encoding method not only ensures the accuracy of positioning and time information, but also significantly improves transmission efficiency, ensuring that critical emergency information can be transmitted completely in a single short message, avoiding the risks of delay and packet loss caused by packet splitting; As an application example of this embodiment, when a user encounters danger in a mountainous area, they can press and hold the SOS button on the walkie-talkie to simultaneously transmit a voice distress signal (PMR446) and send a BeiDou short message containing location information through the satellite communication module, achieving dual-link concurrent transmission. If the channel quality of the walkie-talkie's wireless communication network deteriorates due to terrain obstruction or electromagnetic interference, for example, if the signal-to-noise ratio (SNR) sampling value is lower than 15 dB for three consecutive times, or the received signal strength indication (RSSI) is continuously lower than -100 dBm, the system will automatically resend the BeiDou message. The command center can receive the emergency information through either the wireless network of the voice distress signal or the BeiDou satellite network, thereby ensuring that critical communications can still be reliably delivered in harsh environments, improving the stability and success rate of emergency response, and facilitating the conduct of emergency rescue work.

[0022] This invention provides a method for dual-mode parallel communication of walkie-talkies for both normal and emergency use. It achieves dual-mode parallel communication through a dedicated network emergency channel and short message communication of the Beidou satellite communication system. The two modes operate independently without interference. When one communication mode is restricted, the other communication mode can continue to work, realizing the parallel transmission of voice and data. This effectively solves the problem of single communication failure in complex environments, ensures the continuity and reliability of communication in emergency scenarios, ensures that critical information is not lost, and is conducive to the development of emergency rescue work.

[0023] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for intercom and emergency dual-mode parallel communication, characterized in that, The method comprises the following steps: S1, dual-mode parallel trigger detection: when detecting the emergency trigger operation of the user, the system synchronously starts the first communication mode and the second communication mode, wherein the first communication mode is voice transmission based on intercom wireless communication, used for transmitting user voice information on an intercom private network channel, and the second communication mode is short message communication based on a Beidou satellite communication system, used for sending an emergency message containing positioning information and / or time information to a satellite network; S2, parallel communication execution: the first communication mode and the second communication mode are independently operated and do not interfere with each other, realizing parallel transmission of voice and data; S3, channel quality assessment: during the operation of the first communication mode, the channel quality parameters of the intercom wireless communication network are acquired and assessed in real time; S4, intelligent channel switching: when the channel quality parameters meet the preset switching condition, the system automatically adjusts the communication strategy, and improves the priority or dominant position of the second communication mode in emergency information transmission; S5, hardware integration: the intercom is internally integrated with a satellite communication module, which shares or cooperates with the antenna resources of the radio frequency circuit of the intercom, realizing integrated integration of private network communication and satellite communication functions.

2. The method of claim 1, wherein the method is a method of dual-mode parallel communication of a walkie-talkie. The emergency trigger operation is long-pressing the SOS key, combination key operation or voice instruction trigger.

3. The method of claim 1, wherein the method is a method of dual-mode parallel communication of a walkie-talkie. The first communication mode adopts a private network radio frequency band or other intercom wireless communication protocol.

4. The method of claim 1, wherein the method is a method of dual-mode parallel communication of a walkie-talkie. The second communication mode adopts the RDSS short message service of the Beidou satellite navigation system or other two-way satellite communication service.

5. The method of claim 1, wherein the method is a method of dual-mode parallel communication of a walkie-talkie. The emergency message adopts a compression encoding format to reduce the message length and adapt to the transmission limit of the satellite short message.

6. The method of claim 5, wherein the method is a method of dual-mode parallel communication of a walkie-talkie. The compression encoding format is B-Code format, which is used for binary compression of latitude and longitude and time stamp, and the compression encoding also contains CRC-16 check code for checking the integrity of the message.

7. The method of claim 1, wherein the method is a method of dual-mode parallel communication of a walkie-talkie. The channel quality parameters include signal-to-noise ratio and / or received signal strength indication.

8. The method of claim 7, wherein the method is a method of intercom dual-mode parallel communication. The preset switching condition is that the signal-to-noise ratio is lower than the first threshold value for multiple times in succession, or the received signal strength indication is lower than the second threshold value.

9. The method of claim 8, wherein the method is a method of intercom dual-mode parallel communication. The first threshold value is 15 dB, the multiple times in succession is 3 times, and the sampling period is 100 ms.

10. The method of claim 1, wherein the method is a method of dual-mode parallel communication of a walkie-talkie. The satellite communication module is integrated on the circuit board of the intercom through surface mounting technology, and the size is not more than 20x20 mm, and the antenna is shared with the radio frequency circuit through an antenna switch.

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