Emergency communication time service system and time service super terminal
By designing an emergency communication timing system and a timing hyper-terminal, the problem of communication base stations or relay stations not being synchronized in special environments is solved, and high-precision clock synchronization and stable operation of the communication system in emergency states are achieved.
Patent Information
- Application Number
- CN202510418934.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2025-06-17
AI Technical Summary
In special environments such as underground coal mines, communication base stations or relay stations cannot ensure the synchronization of satellite clocks, resulting in limited clock synchronization capabilities of communication systems.
An emergency communication timing system is designed, including a timing hyper-terminal, which can be moved to the communication range of different equipment to be timed for timing, ensuring high-precision clock synchronization of each communication base station or relay station in the system.
When the satellite timing conditions are not met, the timing hyper-terminal can ensure the system's clock synchronization and ensure the stable and reliable operation of the communication system in an emergency state.
Smart Images
Figure CN120165805A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of digital intercom, and particularly to an emergency communication time synchronization system and a time synchronization super terminal. Background Art
[0002] In the prior art, in a DMR (Digital Mobile Radio) digital mobile communication radio system, in the normal state, both communication base stations or relay stations have the ability of satellite clock synchronization, so the clock synchronization within the system can be ensured, thus ensuring normal communication.
[0003] However, in some special environments, such as underground coal mines and other scenarios, the communication base stations or relay stations cannot guarantee the condition of satellite clock synchronization, so their satellite clock synchronization ability cannot play a role.
[0004] How to design an emergency communication time synchronization system and a time synchronization super terminal, which can still have high-precision clock synchronization ability under special emergency conditions, is a technical problem to be solved. Summary of the Invention
[0005] The technical problem to be solved by the present invention is to avoid the deficiencies of the above-mentioned prior art solutions, and propose an emergency communication time synchronization system. In this emergency communication time synchronization system, a time synchronization super terminal is designed, which can move to the communication range of different devices to be time synchronized for time synchronization, so as to ensure the high-precision clock synchronization of each communication base station or relay station in the system.
[0006] The technical solution of the present application to solve the above technical problem is an emergency communication time synchronization system for clock synchronization of an emergency communication system, including a time synchronization super terminal A, at least two communication base stations or relay stations. The above communication base stations or relay stations include device K1 and device K2; the time synchronization super terminal A includes a satellite antenna module, a time synchronization antenna module, and a high-precision clock module; the above device K1 includes a time synchronization antenna module, a high-precision clock module, and a communication service module; the time synchronization super terminal A receives a satellite time synchronization signal through the satellite antenna module, and calibrates the high-precision clock module with the above satellite time synchronization signal; when the time synchronization super terminal A moves to the receiving range of device K1 for the time synchronization signal, the time synchronization super terminal A sends a time synchronization signal through the time synchronization antenna module, and device K1 calibrates the internal high-precision clock module with the above time synchronization signal; when the time synchronization super terminal A moves to the receiving range of device K2 for the time synchronization signal, the time synchronization super terminal A sends a time synchronization signal through the time synchronization antenna module, and device K2 calibrates the internal high-precision clock module with the above time synchronization signal.
[0007] The above emergency communication and time service system further includes a time service super terminal B and a leaky cable; the output signal of the time service antenna module of the time service super terminal B is electrically connected to the electrical signal of the above leaky cable; the signal of the leaky cable covers the above devices K1 and K2; when the time service super terminal A moves into the range where the time service super terminal B receives the time service signal, the time service super terminal A sends a time service signal through the time service antenna module, and the time service super terminal B calibrates the internal high-precision clock module with the above time service signal; the time service super terminal B sends a time service signal through the leaky cable, and the devices K1 and K2 receive the above time service signal; and the internal high-precision clock module is calibrated with the above time service signal.
[0008] The above emergency communication system is a DMR emergency communication wireless communication system.
[0009] The above time service super terminal A receives a satellite time service signal within a set time period.
[0010] The above time service super terminal A provides time service to the devices K1 and K2 within a set time period.
[0011] It can be that the above satellite time service signal is sent by a Beidou satellite, and the above satellite time service signal is a standard second signal.
[0012] It can be that the above satellite time service signal is sent by a GPS satellite, and the above satellite time service signal is a standard second signal.
[0013] It can be that the time service request is initiated by the device K1 or the device K2; the device K1 or the device K2 sends a time service request to the time service super terminal A, and records the clock node T1 when the time service request is sent; after the time service super terminal A receives the above time service request, the time service super terminal A takes the internal high-precision clock signal and sends a return high-precision clock signal, i.e., a time service signal, to the device K1 or the device K2; the device K1 or the device K2 receives the above high-precision clock signal and records the clock node T4 when the high-precision clock signal is received; the device K1 or the device K2 uses the interval between T4 and T1 to correct the internal high-precision clock signal of the device K1 or the device K2.
[0014] When the time service super terminal A receives the above time service request, it records the clock node T2; when the time service super terminal A sends a return time service signal to the device K1 or the device K2, it records the clock node T3; calculates the time delay value D from the time service request to receiving the high-precision clock signal as D = (T4 - T1) - (T3 - T2); corrects according to the following equations: T2 = T1 + offset + D / 2; T4 = T3 – offset + D / 2; where offset is the time error between the device K1 or the device K2 and the super terminal A; the device K1 or the device K2 adjusts and corrects the internal high-precision clock signal according to the corrected T2, T4, as well as T1 and T3.
[0015] The technical solution of the present application to solve the above technical problems may also be a timing super terminal for clock synchronization of an emergency communication timing system, including a satellite antenna module, a timing antenna module, and a high-precision clock module; the timing super terminal receives satellite timing signals through the satellite antenna module and calibrates the high-precision clock module with the above satellite timing signals; the timing super terminal is used to move to the communication range of different devices to be timed for timing; when the timing super terminal moves to the range where the external device K1 receives the timing signal, the timing super terminal sends a timing signal through the timing antenna module, and the timing signal is used to calibrate the high-precision clock module inside the external device K1; when the timing super terminal moves to the range where the external device K2 receives the timing signal, the timing super terminal sends a timing signal through the timing antenna module, and the timing signal is used to calibrate the high-precision clock module inside the external device K2.
[0016] It may be that the above emergency communication system is a DMR emergency communication wireless communication system.
[0017] It may be that the above timing super terminal receives satellite timing signals within a set time period.
[0018] It may be that the above timing super terminal times multiple external devices within a set time period.
[0019] Compared with the prior art, the beneficial effect of the present application is that the setting of the timing super terminal A can move to different positions to time different communication base stations or relay stations, ensuring that the system still has good clock synchronization when satellite timing conditions are not available, and ensuring the stable and reliable operation of the communication system in an emergency state. It is suitable for underground emergency wireless communication scenarios such as coal mines.
[0020] Compared with the prior art, the beneficial effect of the present application is that the timing super terminal B and the leaky cable can make the coverage range of the timing super terminal A larger and the applicable range wider.
[0021] Compared with the prior art, the beneficial effect of the present application is that the DMR emergency communication wireless communication system is more suitable for using the timing super terminal of the present application.
[0022] Compared with the prior art, the beneficial effect of the present application is that the timing super terminal A receives satellite timing signals within a set time period to ensure the accuracy of its own clock.
[0023] Compared with the prior art, the beneficial effect of the present application is that it times device K1 and device K2 within a set time period and regularly times communication base stations or relay stations to ensure clock synchronization during the emergency period.
[0024] Compared with the prior art, the beneficial effect of the present application is that the satellite timing signal is sent by Beidou or GPS satellites to ensure the accuracy of its own clock.
[0025] Compared with the prior art, the beneficial effects of the present application are as follows: When the timing request is initiated by device K1 or device K2, the system efficiency can be improved, and it is only activated in an emergency situation, that is, when the satellite clock cannot be obtained.
[0026] Compared with the prior art, the beneficial effects of the present application are as follows: The internal high-precision clock signal of device K1 or device K2 is corrected by the interval between T4 and T1, improving the accuracy of clock synchronization.
[0027] Compared with the prior art, the beneficial effects of the present application are as follows: By adjusting and correcting the internal high-precision clock signal according to the corrected T2, T4, T1, and T3, the accuracy of clock synchronization can be further improved.
[0028] Compared with the prior art, the beneficial effects of the present application are as follows: The setting of the timing super terminal facilitates the mobile timing of different devices to be timed.
[0029] Compared with the prior art, the beneficial effects of the present application are as follows: When the satellite timing signal is received within the set time period, multiple external devices are timed within the set time period to ensure the clock synchronization within the set time period and avoid the clock out-of-sync problem caused by a large time interval. Description of the Drawings
[0030] Figure 1 It is a schematic diagram of an embodiment of an emergency communication timing system; Figure 2 It is a schematic diagram of an embodiment of an emergency communication timing system; Figure 3 It is a schematic diagram of an embodiment of an emergency communication timing system; Figure 4 It is a schematic block diagram of a communication base station or a relay station; Figure 5 It is a schematic block diagram of a timing super terminal; Figure 6 It is a schematic block diagram of a timing super terminal; Figure 7 It is a signal timing diagram of an emergency communication timing system; Figure 8 It is a signal timing diagram of an emergency communication timing system; Figure 9 It is a schematic diagram of an embodiment of an emergency communication timing system; Figure 10 It is a partial process schematic diagram of an emergency communication timing system; Figure 11 It is a partial process schematic diagram of an emergency communication timing system; Figure 12 It is a partial process schematic diagram of an emergency communication timing system; Figure 13 It is a schematic diagram of part of the process of the emergency communication time service system; Figure 14 It is a schematic diagram of part of the process of the emergency communication time service system; Figure 15 It is a schematic diagram of part of the process of the emergency communication time service system; Figure 16 It is a schematic diagram of part of the process of the emergency communication time service system. Detailed implementation manners
[0031] The following further details the content of this application in conjunction with each attached drawing.
[0032] As Figure 1 shown, an embodiment of an emergency communication time service system for clock synchronization of an emergency communication system includes a time service super terminal A and at least two communication base stations or relay stations. The above communication base stations or relay stations include devices K1, K2, K3, and K4. The communication base stations or relay stations are used to connect and communicate with multiple mobile communication terminals.
[0033] As Figure 5 shown, the time service super terminal A includes a satellite antenna module, a time service antenna module, and a high-precision clock module.
[0034] As Figure 4 shown, the above device K1 includes a time service antenna module, a high-precision clock module, and a communication service module.
[0035] As Figure 9 shown, the time service super terminal A can receive a satellite time service signal through the satellite antenna module and calibrate the high-precision clock module with the above satellite time service signal.
[0036] As Figure 1 shown, when the time service super terminal A moves into the range where device K1 can receive the time service signal, the time service super terminal A sends a time service signal through the time service antenna module, and device K1 calibrates the internal high-precision clock module with the above time service signal; when the time service super terminal A moves into the range where device K2 can receive the time service signal, the time service super terminal A sends a time service signal through the time service antenna module, and device K2 calibrates the internal high-precision clock module with the above time service signal.
[0037] As Figure 2 shown, when the time service super terminal A moves into the range where device K3 can receive the time service signal, the time service super terminal A sends a time service signal through the time service antenna module, and device K3 calibrates the internal high-precision clock module with the above time service signal; when the time service super terminal A moves into the range where device K4 can receive the time service signal, the time service super terminal A sends a time service signal through the time service antenna module, and device K4 calibrates the internal high-precision clock module with the above time service signal.
[0038] As Figure 3 shown, an embodiment of the emergency communication time service system further includes a time service super terminal B and a leaky cable; the output signal of the time service antenna module of the time service super terminal B is electrically connected to the electrical signal of the leaky cable; the signal of the leaky cable covers the above-mentioned devices K1 and K2; the time service super terminal A moves into the range where the time service super terminal B receives the time service signal, the time service super terminal A sends a time service signal through the time service antenna module, and the time service super terminal B calibrates the internal high-precision clock module with the above-mentioned time service signal; the time service super terminal B sends a time service signal through the leaky cable, and the devices K1 and K2 receive the above-mentioned time service signal; the internal high-precision clock module is calibrated with the above-mentioned time service signal.
[0039] The emergency communication system in this application is a DMR emergency communication wireless communication system.
[0040] The above-mentioned time service super terminal A receives a satellite time service signal within a set time period. The set time period can be set according to the clock accuracy holding duration of device A, and no specific value is set here.
[0041] The above-mentioned time service super terminal A provides time service to devices K1 and K2 within a set time period. The set time period can be set according to the clock accuracy holding duration of device A.
[0042] As Figure 9 shown, the above-mentioned satellite time service signal can be sent by a Beidou satellite, and the above-mentioned satellite time service signal is a standard second signal.
[0043] As Figure 9 shown, the above-mentioned satellite time service signal can be sent by a GPS satellite, and the above-mentioned satellite time service signal is a standard second signal.
[0044] As Figures 7 to 9 , a time service request is initiated by device K1 or device K2.
[0045] As Figure 7 , device K1 or device K2 sends a time service request to the time service super terminal A, and records the clock node T1 when the time service request is sent; after the time service super terminal A receives the above-mentioned time service request, the time service super terminal A takes the internal high-precision clock signal and sends a return high-precision clock signal, that is, a time service signal, to device K1 or device K2; device K1 or device K2 receives the above-mentioned high-precision clock signal and records the clock node T4 when the high-precision clock signal is received; device K1 or device K2 uses the interval between T4 and T1 to correct the internal high-precision clock signal of device K1 or device K2.
[0046] As Figures 7 to 8, when the timing super terminal A receives the above timing request, it records the clock node T2; when the timing super terminal A sends a return timing signal to device K1 or device K2, it records the clock node T3; calculates the time delay value D of the timing request to receiving the high-precision clock signal as D = (T4 - T1) - (T3 - T2); corrects according to the following equations: T2 = T1 + offset + D / 2; T4 = T3 – offset + D / 2; where offset is the time error between device K1 or device K2 and the super terminal A; device K1 or device K2 adjusts and corrects the internal high-precision clock signal according to the corrected T2, T4, as well as T1, T3. offset can be obtained according to the actual test results; offset is only an intermediate variable and is eliminated during the calculation process.
[0047] Such as Figure 5 and Figure 6 , a timing super terminal for clock synchronization of an emergency communication timing system, including a satellite antenna module, a timing antenna module, and a high-precision clock module; the timing super terminal receives satellite timing signals through the satellite antenna module and calibrates the high-precision clock module with the above satellite timing signals; the timing super terminal is used to move to the communication range of different devices to be timed for timing; when the timing super terminal moves into the receiving range of the timing signal of the external device K1, the timing super terminal sends a timing signal through the timing antenna module, and the timing signal is used to calibrate the internal high-precision clock module of the external device K1; when the timing super terminal moves into the receiving range of the timing signal of the external device K2, the timing super terminal sends a timing signal through the timing antenna module, and the timing signal is used to calibrate the internal high-precision clock module of the external device K2.
[0048] The emergency communication system used by the above timing super terminal is a DMR emergency communication wireless communication system; the above timing super terminal receives satellite timing signals within a set time period; the above timing super terminal times multiple external devices within a set time period.
[0049] DMR is an emergency communication wireless standard currently widely used globally issued by ETSI. The present invention only relates to the technical scope of TierII (i.e., the relay mode). The DMR virtual cluster involved in the present invention is a quasi-cluster small system designed with a custom extended protocol based on the DMR TierII standard.
[0050] This DMR virtual cluster system is applicable to a single Site (also translated as: site) environment. The present invention mainly solves a method for clock synchronization of each shared carrier in this application environment (the environment is harsh and it is basically impossible to use external GPS or Beidou). In the case of clock synchronization of each carrier, the terminal can quickly synchronize to a new carrier, thereby accelerating the call response speed.
[0051] When GPS and Beidou signals cannot be received, the cluster carriers within the Site, i.e., communication base stations or relay stations, can no longer use them as clock synchronization sources. In this case, the super terminal with timing function (the only one within the system) in the system sends clock synchronization information regularly so that the cluster carriers can be used as the clock synchronization source.
[0052] Setting of the carrier synchronization source: The available clock synchronization sources for the cluster carriers in this system are: GPS / Beidou, super terminal, and passive. There are 3 independent source detection tasks (Gtask, Ttask, Ntask) in the carrier controller, which detect respectively and jointly maintain the clock source mode control variable of the carrier.
[0053] The principle for the cluster carriers to use the clock synchronization source is as follows: If GPS / Beidou is available, it is immediately set as the clock source. The super terminal source is used as the secondary option. When both are unavailable, it enters the passive state and starts regular broadcasting to call the super terminal to start the clock source.
[0054] As Figure 10 , a flowchart of a GPS / Beidou detection task - Gtask is shown: a. The carrier controller starts a cyclic detection timer; b. The task enters to detect whether GPS / Beidou is available; c. If available, go to d, otherwise go to f; d. Is it currently in the GPS / Beidou mode? If yes, perform clock update. Otherwise, go to e; e. Set it to the GPS / Beidou mode and notify the Ntask task to stop broadcasting out-of-step frames; f. Is it currently in the GPS / Beidou mode? If yes, go to g, g. Increment the unavailable counter by 1; h. Does the unavailable counter exceed the unavailable threshold? If it exceeds, go to i; Notify the Ntask to start sending out-of-step broadcast frames.
[0055] As Figure 11 , a flowchart of a super terminal detection task - Ttask is shown: The super terminal detection is a waiting task that monitors the clock synchronization frames sent by the super terminal.
[0056] a. Receive the terminal synchronization message; b. Is the carrier in the GPS / Beidou mode? If not, go to c; c. Is the carrier in the terminal synchronization mode? If yes, go to d, otherwise go to e; d. Update the carrier clock; e. Set the carrier to the terminal synchronization mode; f. Notify Ntask to stop broadcasting carrier out-of-step frames.
[0057] As Figure 12 , shows a flowchart of the broadcast synchronization loss task - Ntask: Start broadcasting; when the Gtask task detects the loss of GPS / Beidou signals, it will send a message to start broadcasting to Ntask.
[0058] a. Ntask receives the start broadcast message; b. Is the control variable true? No, go to c. Otherwise, go to d; c. Set the control variable to true; d. No operation.
[0059] Broadcast synchronization loss is a passive loop task. The Gtask and Ttask tasks control Ntask to stop or broadcast out-of-step frames by modifying the value of the control variable.
[0060] As Figure 13 , shows a flowchart of stopping broadcasting: a. Receive the stop broadcast message; b. Set the value of the control variable to false.
[0061] There are two sources for Ntask to process the stop broadcast message. One is when Gtask detects that GPS / Beidou is available and the previous carrier mode was not the GPS / Beidou mode, it will send a message to stop broadcasting out-of-step frames to Ntask. The other is when Ttask receives the clock synchronization frame message from the super terminal, after completing the clock setting, it will also send a message to stop broadcasting out-of-step frames to Ntask.
[0062] As Figure 14 , shows a flowchart of broadcasting: a. Start the task; b. Is the value of the control variable == true? Yes, then go to c. Otherwise, go to d; c. Send a carrier synchronization loss frame; d. Sleep for the broadcast loop interval time; e. Jump to detect the control variable if entering a new round of detection process.
[0063] The out-of-step broadcast task - Ntask is a loop detection task. Whether to send a carrier out-of-step frame depends on the control variable, and the value of this variable is set by the control variable mechanism in the previous two sections.
[0064] As Figure 15, shows a flowchart of the super terminal starting to send frames: receiving a carrier out-of-sync frame; a. receiving the first carrier out-of-sync frame; b. setting the super terminal synchronization frame transmission control variable to true. When the super terminal detects that GSP / Beidou is available, it will stop transmitting. Similarly, the process is: a. detecting that GPS / Beidou is available; b. setting the stop super terminal synchronization frame transmission control variable to false.
[0065] As Figure 16 , the super terminal sends a synchronization information frame. Super terminal: It is a special terminal within the Site that is the only one with the ability to send clock synchronization information frames. In the case where the carrier cannot obtain the synchronization mode, it will randomly and continuously broadcast information frames requesting the activation of the super terminal synchronization. After the super terminal is finally triggered, it starts to send clock synchronization information frames for the carrier clock synchronization within the Site.
[0066] As Figure 16 , shows a flowchart of a clock synchronization frame transmission control service task: This service is a loop process. Whether to transmit the synchronization clock frame is controlled by the value of the control variable. The source of the change in the control variable value: Stop transmitting if GPS / Beidou is available, and start transmitting the synchronization clock frame if a clock out-of-sync frame sent by the carrier is received. The selection of the transmission interval should be determined according to actual tests. The clock accuracy of the super terminal itself only needs to be higher than the clock accuracy requirement of DMR. In actual use, it is best for the super terminal not to participate in call services.
[0067] Synchronization frame, that is, the parameters in the synchronization clock frame, are involved in the analysis of the carrier clock synchronization algorithm.
[0068] In this method, the relationship between the super terminal and the carrier is that of a clock server and a client.
[0069] The transmission relationship between the super terminal and the carrier, that is, device K1 or K2, is as follows Figure 7 and Figure 8 shown: When the carrier, that is, device K1 or K2, receives the synchronization broadcast frame from the super terminal, any carrier will start the clock synchronization calculation process. The Site carrier sends a request synchronization frame to the super terminal, records the frame departure time T1, and includes the time T1 in the message; when the request synchronization frame arrives at the super terminal, records the time T2, and after simple processing, the super terminal sends a synchronization response frame, records the synchronization response frame departure time T3. Include the T1, T2, and T3 timestamps in the frame; the Site carrier records the response frame arrival time T4.
[0070] The Site carrier can calculate the following two key parameters using the above four parameters: a. The delay value from the request frame to the response frame: D = (T4 - T1) - (T3 - T2) b. The time error offset between the Site carrier and the super terminal should be based on the following equations: T2 = T1 + offset + D / 2 T4 = T3 – offset + D / 2 The Site carrier will adjust the local clock error according to the offset to achieve time synchronization based on the super terminal. The more precise the clock, the better the synchronization effect.
[0071] Selection of the holding time after Site carrier clock synchronization: The frequency of carrier clock synchronization update should depend on the balance between the number of carriers in the Site and the clock precision. Since the crystal oscillators of the carriers themselves, the crystal oscillator of the super terminal, and the clock offset error of the DMR are related to each other, continuous debugging and optimization based on experience are required during the actual operation. Using the super terminal as the carrier synchronization source within the Site is an emergency method and cannot be regarded as a long-term synchronization source. The GPS / Beidou mode is the most precise method. The current slot number of the super terminal itself must be included in the response frame, which is the timing basis for repeater synchronization and can also further accelerate slot synchronization.
[0072] The above are only embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the invention specification and drawings, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present invention.
Claims
1. An emergency communication timing system, used for emergency communication system clock synchronization, characterized in that: It includes a timing super terminal A and at least two communication base stations or relay stations, wherein the communication base stations or relay stations include a device K1 and a device K2; The timing super terminal A includes a satellite antenna module, a timing antenna module, and a high-precision clock module; The device K1 includes a timing antenna module, a high-precision clock module, and a communication service module; The timing super terminal A receives the satellite timing signal through the satellite antenna module, and uses the satellite timing signal to calibrate the high-precision clock module; The timing super terminal A moves to the range where the device K1 receives the timing signal. The timing super terminal A sends the timing signal through the timing antenna module. The device K1 uses the timing signal to calibrate the internal high-precision clock module. The timing super terminal A moves to the range where the device K2 receives the timing signal. The timing super terminal A sends the timing signal through the timing antenna module. The device K2 uses the timing signal to calibrate the internal high-precision clock module.
2. The emergency communication timing system according to claim 1, characterized in that: It also includes a timing super terminal B and a leakage cable; the timing antenna module output signal of the timing super terminal B is connected to the leakage cable electrical signal; the leakage cable signal covers the device K1 and the device K2; The timing super terminal A moves to the range where the timing super terminal B receives the timing signal. The timing super terminal A sends the timing signal through the timing antenna module, and the timing super terminal B uses the timing signal to calibrate the internal high-precision clock module. The timing super terminal B sends a timing signal through the leaky cable, and the device K1 and the device K2 receive the timing signal; The timing signal is used to calibrate an internal high-precision clock module.
3. The emergency communication timing system according to claim 1, characterized in that: The emergency communication system is a DMR emergency communication wireless communication system.
4. The emergency communication timing system according to claim 1, characterized in that: The timing super terminal A receives the satellite timing signal within a set time period.
5. The emergency communication timing system according to claim 1, characterized in that: The timing super terminal A provides timing to the devices K1 and K2 within a set time period.
6. The emergency communication timing system according to claim 1, characterized in that: Include any of the following technical features: TA1: The satellite timing signal is sent by Beidou satellite and is a standard second signal; TA2: The satellite timing signal is sent by a GPS satellite and is a standard second signal.
7. The emergency communication timing system according to claim 1, characterized in that: The timing request is initiated by device K1 or device K2; Device K1 or device K2 sends a timing request to the timing super terminal A, and records the clock node T1 that sends the timing request; After receiving the timing request, the timing super terminal A obtains the internal high-precision clock signal and sends a return high-precision clock signal, i.e., the timing signal, to the device K1 or the device K2; Device K1 or device K2 receives the high-precision clock signal and records the clock node T4 that receives the high-precision clock signal; The device K1 or the device K2 uses the interval between T4 and T1 to correct the internal high-precision clock signal of the device K1 or the device K2.
8. The emergency communication timing system according to claim 7, characterized in that: When the timing super terminal A receives the timing request, the clock node T2 is recorded; when the timing super terminal A sends a return timing signal to the device K1 or the device K2, the clock node T3 is recorded; Calculate the delay value D from timing request to receiving high-precision clock signal = (T4-T1)-(T3-T2); Corrected according to the following equation: T2 = T1 + offset + D / 2; T4 = T3 – offset + D / 2; Wherein, offset is the time error between device K1 or device K2 and super terminal A; The device K1 or the device K2 adjusts and corrects the internal high-precision clock signal according to the corrected T2, T4, and T1, T3.
9. A timing super terminal, used for clock synchronization of emergency communication timing system, characterized in that: Including satellite antenna module, timing antenna module, and high-precision clock module; The timing super terminal receives the satellite timing signal through the satellite antenna module, and uses the satellite timing signal to calibrate the high-precision clock module; The timing super terminal is used to move to the communication range of different timing equipment to be synchronized for timing; The timing super terminal moves to the range where the external device K1 receives the timing signal. The timing super terminal sends the timing signal through the timing antenna module. The timing signal is used to calibrate the internal high-precision clock module of the external device K1. The timing super terminal moves to the range of the external device K2 to receive the timing signal. The timing super terminal sends the timing signal through the timing antenna module. The timing signal is used to calibrate the internal high-precision clock module of the external device K2.
10. The timing super terminal according to claim 1, characterized in that: Include any of the following technical features: TB1: The emergency communication system is a DMR emergency communication wireless communication system; TB2: The timing super terminal receives the satellite timing signal within the set time period; TB3: The timing super terminal provides timing to multiple external devices within a set time period.