Synchronous signal switching device, method and system

Abstract

The present application discloses a switching device, method and system for synchronization signals, which relates to the field of signal control technology and solves the problem of low real-time performance of synchronization signals. The switching device includes: multiple monitoring devices and multiplexers, multiple monitoring devices are respectively connected to the multiplexers, the multiplexer includes multiple groups of transmission channels, multiple monitoring devices, multiple groups of transmission channels and multiple synchronization signals correspond to each other one by one; each monitoring device is used to monitor whether a synchronization signal corresponding to the monitoring device is received, and generate a detection signal according to the monitoring result, and transmit the detection signal to the multiplexer; the multiplexer is used to determine the target group transmission channel from the multiple groups of transmission channels according to the detection signals transmitted by each monitoring device and the priorities of the preset multiple synchronization signals, and output the target synchronization signal corresponding to the target group transmission channel to the target device through the target group transmission channel.

Description

Technical Field

[0001] The present application relates to the field of signal control technology, and in particular to a switching device, method and system for a synchronization signal. Background Art

[0002] With the rapid development of mobile communication networks, the demand for communication base stations is increasing. During the communication process, synchronization between base stations is often required. The synchronization between base stations is usually achieved based on the received reference synchronization signal. However, in the actual process, in order to ensure the reliability of the transmission of the reference synchronization signal, multiple reference synchronization signals are usually provided, so it is necessary to select a suitable reference synchronization signal from the multiple reference synchronization signals.

[0003] In the prior art, a plurality of synchronization signals are detected by monitoring software of a preset synchronization signal generator, and a synchronization signal is determined from the detected synchronization signals as the synchronization signal source of each base station. However, this method has the problem of low real-time performance, and real-time monitoring through software requires more CPU resources. Summary of the invention

[0004] The present application provides a synchronization signal switching device, method and system, which can solve the problem of low real-time performance of the synchronization signal.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] In a first aspect of an embodiment of the present application, a switching device for a synchronization signal is provided, the switching device comprising: a plurality of monitoring devices and a multiplexer, the plurality of monitoring devices are respectively connected to the multiplexer, the multiplexer comprises a plurality of groups of transmission channels, the plurality of monitoring devices, the plurality of groups of transmission channels and the plurality of synchronization signals respectively correspond one to one;

[0007] Each monitoring device is used to monitor whether a synchronization signal corresponding to the monitoring device is received, generate a detection signal according to the monitoring result, and transmit the detection signal to the multiplexer;

[0008] The multiplexer is used to determine the target group transmission channel from multiple groups of transmission channels based on the detection signals transmitted by each monitoring device and the priorities of the preset multiple synchronization signals, and output the target synchronization signal corresponding to the target group transmission channel to the target device through the target group transmission channel.

[0009] In one embodiment, the monitoring device includes: a detection module and a processing module;

[0010] A detection module is used to monitor in real time whether a synchronization signal corresponding to the monitoring device is received, and output a reference detection signal according to the monitoring result;

[0011] The processing module is used to perform signal conversion processing on the reference detection signal to obtain a detection signal.

[0012] In one embodiment, the multiplexer includes a plurality of preset pins, each of which corresponds to a plurality of monitoring devices. The multiplexer is specifically used for:

[0013] Respectively using the preset pins corresponding to the monitoring devices to receive the detection signals, and determining the target group transmission channel according to the level state of the detection signals and the priority of the synchronization signals;

[0014] According to the mapping relationship between each synchronization signal and each group of transmission channels, a target synchronization signal corresponding to the target group transmission channel is output to the target device through the target group transmission channel.

[0015] In one embodiment, the multiplexer is specifically used for:

[0016] Determine the group transmission channel corresponding to the synchronization signal of the first priority as the target group transmission channel;

[0017] If the level state of the detection signal indicates that the synchronization signal corresponding to the first priority is not received, the group transmission channel corresponding to the synchronization signal of the second priority is determined as the target group transmission channel;

[0018] If the level state of the detection signal indicates that the synchronization signal corresponding to the second priority is not received, the group transmission channel corresponding to the synchronization signal of the third priority is determined as the target group transmission channel.

[0019] In one embodiment, the multiplexer further includes a floating channel, and the multiplexer is further configured to:

[0020] If each detection signal indicates that the corresponding synchronization signal is not received, the suspended channel is determined as the target group transmission channel.

[0021] In one embodiment, the group transmission channel includes a plurality of transmission channels, and the switching device further includes a buffer;

[0022] The buffer is used to divide each synchronization signal into multiple channels, and each channel of the target synchronization signal corresponds to a transmission channel in each group of transmission channels.

[0023] In one embodiment, the detection module includes a timer circuit;

[0024] The timer circuit is used to monitor in real time whether the corresponding synchronization signal is received, and output a reference detection signal according to the detection result.

[0025] In one embodiment, the processing module includes an inverter and an oscillator;

[0026] An inverter, used for performing signal inversion processing on the reference detection signal to obtain a reverse detection signal;

[0027] The oscillator is used to perform signal stabilization processing on the reverse detection signal to obtain a detection signal.

[0028] According to a second aspect of the embodiment of the present application, a synchronization signal switching method is provided. The method is applied to the synchronization signal switching device of the first aspect of the embodiment of the present application. The method includes:

[0029] Each monitoring device monitors whether a synchronization signal corresponding to the monitoring device is received, generates a detection signal according to the monitoring result, and transmits the detection signal to the multiplexer;

[0030] The multiplexer determines the target group transmission channel from multiple groups of transmission channels according to the detection signals transmitted by each monitoring device and the priorities of multiple preset synchronization signals, and outputs the target synchronization signal corresponding to the target group transmission channel to the target device through the target group transmission channel.

[0031] According to a third aspect of the embodiments of the present application, a synchronization signal switching system is provided, the system comprising: the synchronization signal switching device according to the first aspect of the embodiments of the present application and at least one target device.

[0032] A switching device, used for sending a target synchronization signal to a target device;

[0033] The target device is used to perform data synchronization according to the received target synchronization signal sent by the switching device.

[0034] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0035] The switching device of the synchronization signal provided in the embodiment of the present application comprises: a plurality of monitoring devices and a multiplexer, wherein the plurality of monitoring devices are respectively connected to the multiplexer, and the multiplexer comprises a plurality of transmission channels, wherein the plurality of monitoring devices, the plurality of transmission channels and the plurality of synchronization signals correspond to each other one by one. Each monitoring device is used to monitor whether the synchronization signal corresponding to the monitoring device is received, and to generate a detection signal according to the monitoring result, and to transmit the detection signal to the multiplexer; the multiplexer determines the target group transmission channel from the plurality of transmission channels according to the detection signal transmitted by each monitoring device received and the priority of the preset synchronization signal, and outputs the target synchronization signal corresponding to the target group transmission channel to the target device through the target group transmission channel. The switching device can determine the target group transmission channel according to the real-time detection signal of each monitoring device, and transmit the target synchronization signal to the target device through the target group transmission channel, so that the target device performs data synchronization according to the target synchronization signal, so that the real-time performance of the synchronization signal can be improved, and the switching device provided by the present application does not need to increase the processor or maintain the additional software, so as to realize the monitoring and switching of the synchronization signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of the structure of a synchronization signal switching device provided in an embodiment of the present application;

[0037] Figure 2 A structural diagram of a monitoring device in a switching device provided in an embodiment of the present application;

[0038] Figure 3 A schematic diagram of a detection signal provided in an embodiment of the present application;

[0039] Figure 4 A schematic diagram of the internal structure of an oscillator in a switching device provided in an embodiment of the present application;

[0040] Figure 5 A flowchart of a synchronization signal switching method provided in an embodiment of the present application;

[0041] Figure 6 A structural diagram of a synchronization signal switching system is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0044] Additionally, the use of “based on” or “according to” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” or “according to” one or more conditions or values ​​may, in practice, be based on additional conditions or beyond values.

[0045] With the rapid development of mobile communication networks, the demand for communication base stations is increasing. During the communication process, synchronization between base stations is often required. The synchronization between base stations is usually achieved based on the received reference synchronization signal. However, in the actual process, in order to ensure the reliability of the transmission of the reference synchronization signal, multiple reference synchronization signals are usually provided, so it is necessary to select a suitable reference synchronization signal from the multiple reference synchronization signals.

[0046] In the prior art, a plurality of synchronization signals are detected by using preset synchronization signal monitoring software, and a synchronization signal is determined from the detected synchronization signals as the synchronization signal source of each base station. However, this method has the problem of low real-time performance.

[0047] In order to solve the above problems, the embodiment of the present application provides a switching device for a synchronization signal, the switching device includes: a plurality of monitoring devices and a multiplexer, the plurality of monitoring devices are respectively connected to the multiplexer, the multiplexer includes a plurality of groups of transmission channels, and the plurality of monitoring devices, the plurality of groups of transmission channels and the plurality of synchronization signals correspond to each other one by one. Each monitoring device is used to monitor whether a synchronization signal corresponding to the monitoring device is received, and to generate a detection signal according to the monitoring result, and to transmit the detection signal to the multiplexer; the multiplexer determines the target group transmission channel from the plurality of transmission channels according to the priority of the detection signal transmitted by each monitoring device and the preset synchronization signal received, and outputs the target synchronization signal corresponding to the target group transmission channel to the target device through the target group transmission channel. The switching device can determine the target group transmission channel according to the real-time detection signal of each monitoring device, and transmit the target synchronization signal to the target device through the target group transmission channel, so that the target device performs data synchronization according to the target synchronization signal, so that the real-time performance of the synchronization signal can be improved, and the switching device provided by the present application does not need to add an additional processor or maintain additional software, so as to realize the monitoring and switching of the synchronization signal.

[0048] Figure 1 Schematic diagram of the structure of a synchronous signal switching device 10 provided in an embodiment of the present application. Figure 1 As shown, the switching device 10 includes: multiple monitoring devices 101 and a multiplexer 102, the multiple monitoring devices 101 are respectively connected to the multiplexer 102, the multiplexer 102 includes multiple groups of transmission channels, and the multiple monitoring devices 101, the multiple groups of transmission channels and the multiple synchronization signals correspond to each other one by one.

[0049] Each monitoring device 101 is used to monitor whether a synchronization signal corresponding to the monitoring device 101 is received, generate a detection signal according to the monitoring result, and transmit the detection signal to the multiplexer 102 .

[0050] The multiplexer 102 is used to determine the target group transmission channel from multiple groups of transmission channels according to the detection signals transmitted by each monitoring device 101 and the priorities of the preset multiple synchronization signals, and output the target synchronization signal corresponding to the target group transmission channel to the target device through the target group transmission channel.

[0051] Among them, the base station is generally synchronized by receiving a 1-second pulse (PPS) signal. Currently, the 1PPS pulse signals that can provide 1PPS pulses include the 1PPS pulse signal of the global navigation satellite system (GNSS) receiver, the 1PPS pulse signal of the TOD system, and the 1PSS pulse signal recovered by 1588. According to the accuracy of the synchronization signal and the difficulty of obtaining it, the 1PPS pulse signal of the GNSS receiver is used as the first priority synchronization signal, the 1PPS pulse signal of the TOD system is used as the second priority synchronization signal, and the 1PSS pulse signal recovered by 1588 is used as the third priority pulse signal.

[0052] It should be noted that due to the influence of various uncertain factors, there may be a situation where a certain pulse fails to be output. In order to ensure the accuracy and stability of the timing synchronization of the wireless base station, these three pulses need to be switched. The target synchronization signal is determined according to the priority of the synchronization signal for data synchronization of the base station.

[0053] Optional, such as Figure 2 As shown, the monitoring device 101 includes: a detection module 1011 and a processing module 1012 .

[0054] The detection module 1011 is used to monitor in real time whether the synchronization signal corresponding to the monitoring device 101 is received, and output a reference detection signal according to the monitoring result; the processing module 1012 is used to perform signal conversion processing on the reference detection signal to obtain a detection signal.

[0055] Specifically, the detection module 1011 includes a timer circuit, which is used to monitor in real time whether a corresponding synchronization signal is received and output a reference detection signal according to the detection result.

[0056] The processing module 1012 includes an inverter and an oscillator; the inverter is used to perform signal inversion processing on the reference detection signal to obtain a reverse detection signal; the oscillator is used to perform signal stabilization processing on the reverse detection signal to obtain a detection signal.

[0057] It should be noted that the timer circuit can be a watchdog monitoring chip of the SGM820 model, and the oscillator is a retriggerable monostable multivibrator SN74LVC1G123. The main feature of SGM820 is that if there is a pulse of the corresponding synchronization signal detected within 1.4s, it will output a high level. If no pulse is detected within 1.4s, it will output a low level signal of 170ms to 230ms, and then change to a high level again. If no pulse is detected within 1.4s, it will continue to output a low level signal until a normal 1PPS pulse is detected. It also supports a minimum pulse width of 50ns, which is very suitable for the detection of 1PPS pulses.

[0058] Figure 3 A schematic diagram of a detection signal provided in an embodiment of the present application, Figure 3 The first signal in the figure is a schematic diagram of the reference detection signal output by the timer circuit according to the monitoring result. Figure 3 The second signal in is the detection signal generated after the reference detection signal passes through the inverter and the oscillator.

[0059] After the reference detection signal passes through the inverter, if there is a 1PPS pulse synchronization signal, it will continuously output a low level. If the 1PPS pulse synchronization signal is lost, it will repeatedly output a high level with a pulse width of 170 to 230ms. When this signal passes through the oscillator, it outputs a low level when it is low, and outputs a high level when there is a high and low level change, that is, the 1PPS pulse synchronization signal is output when it exists, and the 1PPS pulse synchronization signal is lost. The combination of the above devices generates high and low levels to determine whether the 1PPS synchronization signal exists.

[0060] Specifically, the internal structure diagram of the oscillator is as follows: Figure 4 As shown, in order to ensure Figure 3 The tw length of the pulse signal can be adjusted by adjusting the resistance and capacitance values ​​inside the oscillator. Wherein, tw = K × R × C, where K is a preset constant, R is a resistance value, and C is a capacitance value.

[0061] In one embodiment, the multiplexer 102 includes a plurality of preset pins, each of which corresponds to a plurality of monitoring devices 101. The multiplexer 102 is specifically used for:

[0062] Respectively use the preset pins corresponding to the monitoring devices 101 to receive each detection signal, and determine the target group transmission channel according to the level state of each detection signal and the priority of each synchronization signal;

[0063] According to the mapping relationship between each synchronization signal and each group of transmission channels, a target synchronization signal corresponding to the target group transmission channel is output to the target device through the target group transmission channel.

[0064] Specifically, the multiplexer 102 is specifically used to: determine the group transmission channel corresponding to the synchronization signal of the first priority as the target group transmission channel; if the level status of the detection signal indicates that the synchronization signal corresponding to the first priority has not been received, then determine the group transmission channel corresponding to the synchronization signal of the second priority as the target group transmission channel; if the level status of the detection signal indicates that the synchronization signal corresponding to the second priority has not been received, then determine the group transmission channel corresponding to the synchronization signal of the third priority as the target group transmission channel.

[0065] Optionally, the multiplexer 102 further includes a suspended channel, and the multiplexer 102 is further configured to: if each detection signal indicates that the corresponding synchronization signal is not received, determine the suspended channel as the target group transmission channel.

[0066] Wherein, each group of transmission channels includes a plurality of transmission channels, and the switching device 10 further includes a buffer;

[0067] The buffer is used to divide each synchronization signal into multiple channels, and each channel of the target synchronization signal corresponds to a transmission channel in each group of transmission channels.

[0068] The multiplexer 102 may be a CD4051 multiplexer 102. After the three synchronization signals pass through the monitoring device 101, they may be multiplexed and selected through an 8:1 analog switch. Specifically, they may be allocated according to the data in Table 1.

[0069] Table 1 Correspondence between synchronization signals and transmission channels

[0070]

[0071] As shown in Table 1, the detection level of 1PPS is connected to the ABC channel selection on the CD4051 multiplexer. When the first priority GNSS detection level is 0, it means that the first priority 1PPS always exists. Channel selections 0 1 2 3 are all connected to the GNSS 1PPS. In this way, regardless of whether the second and third priority 1PPS exist or not, the first priority is selected. Similarly, when the first priority 1PPS fails, the C pin is pulled high and the B pin is pulled low, and the second priority 1PPS starts to switch to the output channel. Regardless of whether the third priority 1PPS exists or not, the second priority is selected until the second priority 1PPS also fails. The third priority starts switching operation. During this process, if the high priority 1PPS returns to normal, it can automatically switch to the high priority channel. If all three 1PPS fail, switch to the suspended 7th channel.

[0072] The embodiment of the present application provides a switching device 10 for a synchronization signal, and the switching device 10 includes: a plurality of monitoring devices 101 and a multiplexer 102, wherein the plurality of monitoring devices 101 are respectively connected to the multiplexer 102, and the multiplexer 102 includes a plurality of groups of transmission channels, and the plurality of monitoring devices 101, the plurality of groups of transmission channels and the plurality of synchronization signals correspond to each other one by one. Each monitoring device 101 is used to monitor whether a synchronization signal corresponding to the monitoring device 101 is received, and to generate a detection signal according to the monitoring result, and to transmit the detection signal to the multiplexer 102; the multiplexer 102 determines a target group transmission channel from the plurality of transmission channels according to the detection signal transmitted by each monitoring device 101 and the priority of the preset synchronization signal, and outputs a target synchronization signal corresponding to the target group transmission channel to the target device through the target group transmission channel. The switching device 10 can determine the target group transmission channel according to the real-time detection signal of each monitoring device 101, and transmit the target synchronization signal to the target device through the target group transmission channel, so that the target device can synchronize data according to the target synchronization signal, which can improve the real-time performance of the synchronization signal. At the same time, the switching device 10 provided by the present application does not require additional processors or maintenance of additional software to achieve the monitoring and switching of synchronization signals. Furthermore, compared with the prior art, the switching device 10 of the synchronization signal provided by the present application automatically switches and recovers according to the priority setting through a pure hardware solution, without the need for complex software monitoring and processing, and without the need for software maintenance.

[0073] like Figure 5 As shown, the embodiment of the present application further provides a method for switching a synchronization signal, and the method may be performed by a synchronization signal switching device. Specifically, the method includes:

[0074] Step 501: Each monitoring device monitors whether a synchronization signal corresponding to the monitoring device is received, generates a detection signal according to the monitoring result, and transmits the detection signal to the multiplexer;

[0075] Step 502: The multiplexer determines a target group transmission channel from multiple groups of transmission channels according to the detection signals received from the monitoring devices and the priorities of the preset multiple synchronization signals, and outputs a target synchronization signal corresponding to the target group transmission channel to the target device through the target group transmission channel.

[0076] In one embodiment, each monitoring device monitors whether a synchronization signal corresponding to the monitoring device is received, and generates a detection signal according to the monitoring result, including:

[0077] The detection module monitors in real time whether a synchronization signal corresponding to the monitoring device is received, and outputs a reference detection signal according to the monitoring result;

[0078] The processing module performs signal conversion processing on the reference detection signal to obtain a detection signal.

[0079] In one embodiment, the multiplexer determines the target group transmission channel from the multiple groups of transmission channels according to the detection signals transmitted by the received monitoring devices and the priorities of the preset multiple synchronization signals, and outputs the target synchronization signal corresponding to the target group transmission channel to the target device through the target group transmission channel, including:

[0080] Respectively using the preset pins corresponding to the monitoring devices to receive the detection signals, and determining the target group transmission channel according to the level state of the detection signals and the priority of the synchronization signals;

[0081] According to the mapping relationship between each synchronization signal and each group of transmission channels, a target synchronization signal corresponding to the target group transmission channel is output to the target device through the target group transmission channel.

[0082] In one embodiment, the multiplexer determines the target group transmission channel from the multiple groups of transmission channels according to the received detection signals transmitted by the monitoring devices and the priorities of the preset multiple synchronization signals, including:

[0083] Determine the group transmission channel corresponding to the synchronization signal of the first priority as the target group transmission channel;

[0084] If the level state of the detection signal indicates that the synchronization signal corresponding to the first priority is not received, the group transmission channel corresponding to the synchronization signal of the second priority is determined as the target group transmission channel;

[0085] If the level state of the detection signal indicates that the synchronization signal corresponding to the second priority is not received, the group transmission channel corresponding to the synchronization signal of the third priority is determined as the target group transmission channel.

[0086] In one embodiment, the method further comprises:

[0087] If each detection signal indicates that the corresponding synchronization signal is not received, the suspended channel is determined as the target group transmission channel.

[0088] In one embodiment, outputting a target synchronization signal corresponding to the target group transmission channel to the target device through the target group transmission channel includes:

[0089] The buffer is used to divide each synchronization signal into multiple channels, and each channel of the target synchronization signal corresponds to a transmission channel in each group of transmission channels.

[0090] The multiplexer transmits the plurality of target synchronization signals to the target device through the transmission channels in the target group transmission channel.

[0091] In one embodiment, the method further includes: a timer circuit, configured to monitor in real time whether a corresponding synchronization signal is received, and output a reference detection signal according to a detection result.

[0092] In one embodiment, the method further includes: an inverter for performing signal inversion processing on the reference detection signal to obtain a reverse detection signal; and an oscillator for performing signal stabilization processing on the reverse detection signal to obtain a detection signal.

[0093] like Figure 6 As shown, an embodiment of the present application provides a synchronization signal switching system, which includes: a switching device 10 in the above embodiment and at least one target device 20; the switching device 10 is used to send a target synchronization signal to the target device; the target device 20 is used to perform data synchronization according to the target synchronization signal sent by the received switching device 10.

[0094] Optionally, the target device may be a base station or other device that requires signal synchronization.

[0095] For specific limitations on the above-mentioned synchronization signal switching method and synchronization signal switching system, please refer to the limitations on the synchronization signal switching device, and the embodiments of the present application will not elaborate on this.

[0096] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loading and executing computer execution instructions on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. Computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server, data center, etc. that contains one or more servers that can be integrated with a medium. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0097] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A synchronous signal switching device, characterized in that: The switching device comprises: a plurality of monitoring devices and a multiplexer, the plurality of monitoring devices are respectively connected to the multiplexer, the multiplexer comprises a plurality of groups of transmission channels, and the plurality of monitoring devices, the plurality of groups of transmission channels and the plurality of synchronization signals correspond to each other one by one; Each of the monitoring devices is used to monitor whether a synchronization signal corresponding to the monitoring device is received, generate a detection signal according to the monitoring result, and transmit the detection signal to the multiplexer; The multiplexer is used to determine a target group transmission channel from the multiple groups of transmission channels according to the received detection signals transmitted by each of the monitoring devices and the priorities of the preset multiple synchronization signals, and output a target synchronization signal corresponding to the target group transmission channel to the target device through the target group transmission channel; The multiplexer includes a plurality of preset pins, and the plurality of preset pins correspond to the plurality of monitoring devices one by one, respectively. The multiplexer is specifically used for: Respectively using preset pins corresponding to the monitoring devices to receive the detection signals, and determining the target group transmission channel according to the level status of the detection signals and the priority of the synchronization signals; According to the mapping relationship between each synchronization signal and each group of transmission channels, outputting the target synchronization signal corresponding to the target group transmission channel to the target device through the target group transmission channel; The monitoring device comprises: a detection module and a processing module; The detection module is used to monitor in real time whether a synchronization signal corresponding to the monitoring device is received, and output a reference detection signal according to the monitoring result; The processing module is used to perform signal conversion processing on the reference detection signal to obtain the detection signal.

2. The switching device according to claim 1, characterized in that The multiplexer is specifically used for: Determine the group transmission channel corresponding to the synchronization signal of the first priority as the target group transmission channel; If the level state of the detection signal indicates that the synchronization signal corresponding to the first priority is not received, determining the group transmission channel corresponding to the synchronization signal of the second priority as the target group transmission channel; If the level state of the detection signal indicates that the synchronization signal corresponding to the second priority is not received, the group transmission channel corresponding to the synchronization signal of the third priority is determined as the target group transmission channel.

3. The switching device according to claim 2, characterized in that: The multiplexer further comprises a suspended channel, and the multiplexer is further used for: If each of the detection signals indicates that the corresponding synchronization signal is not received, the suspended channel is determined as the target group transmission channel.

4. The switching device according to claim 2, characterized in that: The group transmission channel includes a plurality of transmission channels, and the switching device further includes a buffer; The buffer is used to divide each of the synchronization signals into multiple channels, and each channel of the target synchronization signal corresponds to a transmission channel in each group of transmission channels.

5. The switching device according to claim 1, characterized in that: The detection module includes a timer circuit; The timer circuit is used to monitor in real time whether the corresponding synchronization signal is received, and output the reference detection signal according to the detection result.

6. The switching device according to claim 1, characterized in that: The processing module includes an inverter and an oscillator; The inverter is used to perform signal inversion processing on the reference detection signal to obtain a reverse detection signal; The oscillator is used to perform signal stabilization processing on the reverse detection signal to obtain the detection signal.

7. A method for switching a synchronization signal, characterized in that: The method applied to the synchronization signal switching device according to any one of claims 1 to 6 comprises: Each monitoring device monitors whether a synchronization signal corresponding to the monitoring device is received, generates a detection signal according to the monitoring result, and transmits the detection signal to the multiplexer; The multiplexer includes a plurality of preset pins, and the plurality of preset pins correspond one-to-one to the plurality of monitoring devices respectively; The multiplexer receives each of the detection signals using the preset pins corresponding to each of the monitoring devices, and determines the target group transmission channel according to the level status of each of the detection signals and the priority of each of the synchronization signals; and outputs the target synchronization signal corresponding to the target group transmission channel to the target device through the target group transmission channel according to the mapping relationship between each synchronization signal and each group of transmission channels.

8. A synchronization signal switching system, characterized in that: The system comprises: the switching device according to any one of claims 1 to 6 and at least one target device; The switching device is used to send a target synchronization signal to the target device; The target device is used to perform data synchronization according to the received target synchronization signal sent by the switching device.

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