Air interface time synchronization method for mobile terminal, mobile terminal and readable storage medium

Abstract

A method for air interface timing of a mobile terminal, a mobile terminal, and a readable storage medium according to an embodiment of the present invention include: receiving a broadcast message sent by a base station, where the broadcast message includes a time synchronization message; when the synchronization time source is the time synchronization message, executing a time synchronization policy to determine whether the time accuracy of the base station meets a preset condition; if so, continuing to use the time synchronization message as the synchronization time source; if not, using locally maintained time information as the synchronization time source. Executing a time synchronization policy to determine whether the time accuracy of the base station meets a preset condition. When the preset condition is met, the synchronization time of the base station is available, and the time synchronization message of the base station is used as the synchronization time source. When the preset condition is not met, the synchronization time of the base station is unavailable, and locally maintained time information is used as the synchronization time source, realizing time synchronization of the mobile terminal during movement and at the same time improving the time synchronization accuracy of the mobile terminal during movement.

Description

Technical Field

[0001] Embodiments of the present invention relate to, but are not limited to, the field of wireless communication technologies. Specifically, embodiments of the present invention relate to, but are not limited to, an air interface timing method for a mobile terminal, a mobile terminal, and a readable storage medium. Background Art

[0002] With the rapid development of wireless communication technologies, a network system of everything interconnected has gradually formed in various fields. More and more device entities are connected to the Internet through wireless communication technologies, and it is required that high-precision time synchronization must be maintained between devices to reliably complete the same instruction.

[0003] In the application of wireless communication technologies, traditional terminal devices must have a GPS (Global Positioning System) / Beidou system for time synchronization, and the application cost is high. With the application of air interface timing technology in 5G, the base station can synchronize time information to terminal devices in a broadcast manner through the air interface by means of system messages, so that the terminal devices can maintain high-precision time synchronization with the base station. However, according to test practices, it is found that the current air interface timing scheme only supports the application scenarios of fixed-point terminals, and there are the following disadvantages in the process of promoting the application of the scheme: First, when the application terminal is in a mobile application scenario, the device terminal switches between different signal strength ranges covered by the base station, and the existing air interface timing scheme cannot guarantee the time synchronization accuracy between the terminal and the base station; Second, the terminal device will frequently switch the access network device according to the actual received signal quality, and the existing air interface timing scheme cannot guarantee the base station timing accuracy during the switching process. To sum up, when the terminal moves or switches under different signal qualities, it is unreliable to synchronize the base station clock signal using related air interface timing technologies. Under the background of the gradual commercialization and popularization of 5G communication technologies, it is not conducive to the application and promotion of air interface timing technologies. Summary of the Invention

[0004] The air interface timing method for a mobile terminal, the mobile terminal, and the readable storage medium provided by embodiments of the present invention mainly solve the technical problem that the time synchronization accuracy is relatively low when the current air interface timing technology is applied to mobile terminals.

[0005] To solve the above technical problem, an air interface timing method for a mobile terminal provided by embodiments of the present invention includes: receiving a broadcast message sent by a base station, where the broadcast message includes a time synchronization message;

[0006] When the synchronization time source is the time synchronization message, execute a time synchronization policy to determine whether the time accuracy of the base station meets a preset condition;

[0007] If so, continue to use the time synchronization message as the synchronization time source;

[0008] When the answer is no, the locally maintained time information is used as the synchronization time source.

[0009] An embodiment of the present invention further provides a mobile terminal, including: a processor, a memory, and a communication bus;

[0010] The communication bus is used to implement connection communication between the processor and the memory;

[0011] The processor is configured to execute one or more programs stored in the memory to implement the steps of the air interface timing method of the mobile terminal provided by the embodiment of the present invention.

[0012] An embodiment of the present invention further provides a computer storage medium. The computer-readable storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the steps of the air interface timing method of the mobile terminal provided by the embodiment of the present invention.

[0013] According to the air interface timing method, mobile terminal, and readable storage medium of the mobile terminal provided by the embodiment of the present invention, it includes: receiving a broadcast message sent by a base station, where the broadcast message includes a time synchronization message; when the synchronization time source is the time synchronization message, executing a time synchronization policy to determine whether the time accuracy of the base station meets a preset condition; when it is yes, continuing to use the time synchronization message as the synchronization time source; when it is no, using the locally maintained time information as the synchronization time source. Executing a time synchronization policy to determine whether the time accuracy of the base station meets a preset condition. When the preset condition is met, the synchronization time of the base station is available, and the time synchronization message of the base station is used as the synchronization time source. When the preset condition is not met, the synchronization time of the base station is unavailable, and the locally maintained time information is used as the synchronization time source, realizing time synchronization of the mobile terminal during movement, and at the same time improving the time synchronization accuracy of the mobile terminal during movement.

[0014] Other features and corresponding beneficial effects of the present invention are described and explained in the subsequent part of the specification, and it should be understood that at least some of the beneficial effects are obvious from the records in the specification of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic flowchart of an air interface timing method of a mobile terminal provided in Embodiment 1 of the present invention;

[0016] Figure 2 It is a schematic structural composition diagram of a mobile terminal provided in Embodiment 2 of the present invention;

[0017] Figure 3 It is a data acquisition and storage flowchart provided in Embodiment 3 of the present invention;

[0018] Figure 4A data collection and update flow chart provided in the third embodiment of the present invention;

[0019] Figure 5 A flow chart of a terminal device receiving a base station time synchronization signal provided in the third embodiment of the present invention;

[0020] Figure 6 A data processing flow provided in the third embodiment of the present invention;

[0021] Figure 7 A flow chart of a terminal dynamic timing strategy provided in the third embodiment of the present invention. Detailed implementation manners

[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the embodiments of the present invention will be further described in detail below through specific implementation manners in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] Embodiment 1:

[0024] In order to solve the problems of timing and time synchronization of a mobile terminal, and to improve the time synchronization accuracy during the movement process, the embodiment of the present invention provides an air interface timing method for a mobile terminal. The mobile terminal does not need to access the GPS / Beidou system, which reduces the application cost; it can effectively solve the problem that the air interface timing technology cannot guarantee the timing accuracy when the mobile terminal or the terminal switches to access the network device; and achieves the time synchronization of the mobile terminal, improving the time synchronization accuracy of the mobile terminal during the movement process.

[0025] Please refer to Figure 1 , Figure 1 , which is a schematic flow chart of an air interface timing method for a mobile terminal provided in this embodiment. The steps of the air interface timing method for a mobile terminal include:

[0026] Step S101, receiving a broadcast message sent by a base station.

[0027] In this embodiment, the base station sends a broadcast message in a broadcast manner, and the terminal receives the broadcast message when time synchronization is required. The broadcast message includes a time synchronization message, and the synchronization time of the base station can be known through the time synchronization message in the broadcast message.

[0028] Step S102, when the synchronization time source is the time synchronization message, execute a time synchronization strategy to determine whether the time accuracy of the base station meets a preset condition.

[0029] In this embodiment, the time synchronization policy is executed, and whether the preset condition is met is judged to determine whether the synchronization time of the base station receiving the broadcast message meets the time accuracy requirement. By judging the synchronization time of the base station through the time synchronization policy to determine whether the time accuracy meets the preset condition, it can be determined whether the synchronization time of the current base station receiving the broadcast message is accurate, so as to determine whether the mobile terminal uses the time synchronization message in the broadcast message as the time synchronization source or the locally maintained time information as the time synchronization source.

[0030] Step S103: If it is yes, continue to use the time synchronization message as the synchronization time source.

[0031] When it is determined that the synchronization time accuracy of the base station meets the preset condition, it is determined that the synchronization time information of the currently received base station can be used as the synchronization time source, and the mobile terminal can use the time synchronization message in the broadcast message for time synchronization.

[0032] Step S104: If it is no, use the locally maintained time information as the synchronization time source.

[0033] When it is determined that the synchronization time accuracy of the base station does not meet the preset condition, in order to ensure the accuracy of the synchronization time, the time information locally maintained by the mobile terminal is used as the synchronization time source for time synchronization. In this embodiment, the synchronization time adopted by the mobile terminal preferentially selects the base station time, and only when the synchronization time of the base station does not meet the accuracy requirement will the locally maintained time be adopted.

[0034] In some other embodiments, the execution of the time synchronization policy to judge whether the time accuracy of the base station meets the preset condition includes: collecting and updating the signal strength of the base station in real time, judging whether the change value of the signal strength is greater than or equal to the preset signal strength change threshold. When the change value of the signal strength is greater than or equal to the preset signal strength change threshold, the time accuracy of the base station does not meet the preset condition, otherwise it meets the preset condition; or, the mobile terminal collects and updates the signal strength of the received base station in real time, judges whether the signal strength value is greater than or equal to the preset signal strength threshold. When the signal strength value is greater than or equal to the preset signal strength value, the time accuracy of the base station meets the preset condition, otherwise it does not meet the preset condition.

[0035] When receiving the broadcast signal of the base station, the mobile terminal can collect and update the signal strength of the base station receiving the broadcast signal in real time. The mobile terminal can determine whether the synchronization time sent by the base station is accurate and meets the requirement of time accuracy, that is, whether it meets the preset condition, by judging whether the change value of the signal strength is greater than or equal to the preset strength change threshold; or by judging whether the signal strength value is greater than or equal to the preset signal strength threshold. The change value and the value of the signal strength here can be used to represent the time accuracy of the synchronization time of the base station. The smaller the signal change value of the base station, the more accurate the time accuracy of the base station. Similarly, the larger the signal strength value, the more accurate the time accuracy of the base station. It should be noted that in this embodiment, the signal strength is used as the basis for judging the time accuracy of the synchronization time. In actual applications, other bases that can judge the time accuracy of the base station can also be used, such as the signal interference strength value, the distance between the terminal and the base station, and the moving speed of the mobile terminal.

[0036] The air interface timing method of the mobile terminal provided in this embodiment enables the mobile terminal to dynamically select a time synchronization source according to the signal quality and the local time output by the terminal. It should be noted that the above preset signal strength threshold is a preset value, and its specific data value can be flexibly set according to the actual situation.

[0037] By determining the change value of the signal strength of the base station, the stability of the broadcast information sent by the base station can be determined, and the moving state of the mobile terminal can also be determined. For example, the signal change value during rapid movement of the user is usually greater than that during slow movement, so as to determine the time accuracy of the base station currently receiving the broadcast information.

[0038] In some other embodiments, when the time accuracy of the base station does not meet the preset condition, it further includes: judging whether the local maintenance time information meets the accuracy retention threshold; if so, using the local maintenance time information as the synchronization time source; if not, continuing to use the time synchronization message as the synchronization time source.

[0039] Since the time accuracy of locally maintained time information gradually decreases over time, when the mobile terminal determines that the time accuracy of the base station does not meet the preset conditions, it is also necessary to determine whether the locally maintained time information is greater than the accuracy retention threshold. This accuracy retention threshold is used to represent the deviation value of time accuracy. The larger the deviation value, the worse the time accuracy. Only when the locally maintained time is within the accuracy retention threshold will the locally maintained time information be selected as the synchronization time source; otherwise, the time synchronization message will continue to be used as the synchronization time source. Under normal circumstances, the reliability of the synchronization time of the base station is greater than that of the locally maintained synchronization time. Therefore, when the locally maintained time also does not meet the requirements of time synchronization, the synchronization time information of the base station is still selected as the synchronization time source.

[0040] In some other embodiments, when using the locally maintained time information as the synchronization time source, it further includes: determining whether the locally maintained time information meets the accuracy retention threshold; if so, continuing to use the locally maintained time information as the synchronization time source; if not, receiving the broadcast message sent by the base station and using the time synchronization message of the base station as the synchronization time source.

[0041] Over time, the time accuracy of the synchronization time of the locally maintained time information will gradually decrease. Therefore, when the synchronization time source selects to use the locally maintained time, it is necessary to continuously determine whether the locally maintained time information meets the accuracy retention threshold. When the locally maintained time information does not meet the accuracy retention threshold, it is necessary to continue to receive the broadcast message sent by the base station and use the synchronization time information obtained from the base station as the time synchronization source.

[0042] In some other embodiments, when using the time synchronization message as the synchronization time source, it further includes: reading the locally maintained time information in real time and determining whether the locally maintained time information meets the accuracy retention threshold; if so, the locally maintained time information remains unchanged; if not, receiving the broadcast message sent by the base station and using the time synchronization message of the base station as the synchronization time source.

[0043] In order to maintain the freshness of the locally maintained time information and ensure the time accuracy when the mobile terminal uses the locally maintained time information as the time synchronization source, the locally maintained time still needs to be maintained and updated when it is not in use.

[0044] According to the above description, for the air interface timing method of the mobile terminal provided in this embodiment, when the signal strength of the terminal is within the signal strength range of different scenarios and the signal strength changes too fast, the local maintenance time is output to maintain the time synchronization accuracy; when it is detected that the change range of the signal strength value is stable within the set threshold within the terminal's holding capacity, it can be determined that the terminal is moving within the information strength range of the same scenario, and at this time, the terminal synchronizes the time information of the base station; when it is detected that the terminal keeps outputting the local time exceeding the terminal's holding capacity, that is, greater than the accuracy holding threshold, the terminal immediately synchronizes the time information of the base station.

[0045] In some other embodiments, the accuracy holding threshold includes: the maintenance time length threshold for using the local maintenance time as the time synchronization source.

[0046] The maintenance time length threshold refers to the time length that the synchronization time obtained at the most recent update of the local maintenance time is maintained. As the maintenance time passes, the accuracy of the local maintenance time will gradually decrease. Therefore, it is possible to judge whether the time accuracy of the local maintenance time meets the requirements of the synchronization time by judging the maintenance duration of the local maintenance time as the time synchronization source.

[0047] In some other embodiments, when the time accuracy of the base station meets the preset conditions, it further includes: updating the time synchronization message to the local maintenance time information.

[0048] In order to keep the freshness of the local maintenance time, when the mobile terminal determines that the time synchronization information in the broadcast information of the base station meets the time accuracy requirements, it will also update the time information of this synchronization to the local maintenance time information as the initial time of the local maintenance time.

[0049] In some other embodiments, the broadcast message sent by the receiving base station further includes time quality information; according to the time quality information, the base station with the best time quality is selected as the time synchronization source.

[0050] Selecting the optimal base station as the time synchronization source can reduce the probability of losing the synchronization clock source and improve the accuracy of time synchronization. In the network environment where the mobile terminal is located, it usually receives broadcast information sent by multiple base stations. In order to further improve the accuracy of time synchronization and the efficiency of time synchronization, the base station also includes time quality information in the broadcast information sent. When the mobile terminal selects a base station, it can select the base station with good time quality information as the signal source for time synchronization.

[0051] The air interface timing method of the mobile terminal provided by the embodiment of the present invention includes: receiving a broadcast message sent by a base station, where the broadcast message includes a time synchronization message; when the synchronization time source is the time synchronization message, executing a time synchronization policy to determine whether the time accuracy of the base station meets a preset condition; if so, continuing to use the time synchronization message as the synchronization time source; if not, using the locally maintained time information as the synchronization time source. By executing the time synchronization policy to determine whether the time accuracy of the base station meets the preset condition, when the preset condition is met, the synchronization time of the base station is available, and the time synchronization message of the base station is used as the synchronization time source; when the preset condition is not met, the synchronization time of the base station is unavailable, and the locally maintained time information is used as the synchronization time source, realizing the time synchronization of the mobile terminal during the movement process, and at the same time improving the time synchronization accuracy of the mobile terminal during the movement process.

[0052] Embodiment 2:

[0053] This embodiment also provides a mobile terminal. Refer to Figure 2 As shown, it includes a processor 21, a memory 22, and a communication bus 23, where:

[0054] The communication bus 23 is used to implement the connection and communication between the processor 21 and the memory 22;

[0055] The processor 21 is used to execute one or more programs stored in the memory 22 to implement the steps of the air interface timing method of the mobile terminal in each embodiment of the present invention.

[0056] This embodiment also provides a computer-readable storage medium, which includes a volatile or non-volatile, removable or non-removable medium implemented in any method or technology for storing information (such as computer-readable instructions, data structures, computer program modules, or other data). The computer-readable storage medium includes, but is not limited to, RAM (Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), flash memory, or other memory technologies, CD-ROM (Compact Disc Read-Only Memory), digital versatile disc (DVD), or other optical disc storage, magnetic cassette, tape, magnetic disk storage, or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer.

[0057] The computer-readable storage medium in this embodiment can be used to store one or more computer programs, and the one or more computer programs stored therein can be executed by a processor to implement at least one step of an air interface timing method for a mobile terminal provided in an embodiment of the present invention.

[0058] Embodiment three:

[0059] The present invention is based on wireless communication technology and air interface timing technology, and proposes an air interface timing method for a mobile terminal for application scenarios when a mobile terminal or a terminal switches access network equipment. At the same time, the optimal base station is selected for time synchronization according to the time quality value of the timing information (i.e., time synchronization information) sent by the base station. The specific implementation is as follows:

[0060] Step 1: Preset the signal strength threshold and the terminal retention time value on the mobile terminal device. The specific process is shown as follows: Figure 3 As shown, Figure 3 A data collection and storage flow chart provided for this embodiment includes:

[0061] 1. The user writes the signal strength adjustment threshold to the data acquisition module according to application requirements;

[0062] 2. Store the signal strength value in the data storage module;

[0063] 3. According to the existing technical implementation scheme, the user presets the terminal retention capability time value in the terminal device data acquisition module;

[0064] 4. Store the retention capability time value in the data storage module.

[0065] Step 2: The terminal device collects and updates the signal strength information in real time. The specific process is as follows: Figure 4 As shown, Figure 4 A data collection and update flow chart provided for this embodiment includes:

[0066] 1. In actual application environments, the base station signal quality varies with the signal coverage range;

[0067] 2. The perceived signal quality of the terminal device changes as the mobile range changes;

[0068] 3. The data acquisition module collects the signal strength value and stores it in the data storage module;

[0069] 4. The terminal device data acquisition module reads and updates the signal strength value in the data storage module in real time according to the perception information.

[0070] Step 3: The terminal device receives the base station time synchronization signal. The specific process is as follows: Figure 5 As shown, Figure 5A flowchart of a terminal device receiving a base station time synchronization signal provided in this embodiment includes:

[0071] 1. Using 5G communication technology as the data transmission medium and air interface timing as the technical means, the base station broadcasts system messages.

[0072] 2. Through 5G communication technology, the data acquisition module of the terminal device receives the system messages broadcast by the base station through the air interface.

[0073] Step Four: Compare and analyze the real-time change range value of the signal strength information with the threshold, and at the same time compare and analyze the terminal holding ability time value with the holding time. The specific process is shown as Figure 6 shown. Figure 6 A data processing process provided in this embodiment includes:

[0074] 1. The data processing module of the terminal device reads the signal strength threshold in the data storage module in real time.

[0075] 2. The data processing module of the terminal device reads the real-time change range value of the signal strength information in the data storage module in real time.

[0076] 3. The data processing module of the terminal device compares the signal strength threshold with the real-time change range value of the signal strength information.

[0077] 4. The data processing module of the terminal device reads the terminal holding ability time value in the data storage module in real time.

[0078] 5. The data processing module of the terminal device compares the terminal holding ability time value with the terminal output holding time.

[0079] 6. The data processing module of the terminal device identifies and compares the time quality information of different base stations.

[0080] Step Five: According to the analysis result of the data processing module, execute the terminal dynamic timing strategy proposed by the present invention, and at the same time select the optimal base station for time synchronization according to the time quality value in the system information broadcast by the base station. The specific process is shown as Figure 7 shown. Figure 7 A flowchart of a terminal dynamic timing strategy provided in this embodiment includes:

[0081] 1. According to the analysis result of the data processing module, select the optimal base station for time synchronization.

[0082] 2. According to the analysis result of the data processing module, when the real-time change range value of the signal strength information is greater than the signal strength threshold, the data output module of the terminal device outputs the locally maintained time to maintain the time synchronization accuracy.

[0083] 3. According to the analysis result of the data processing module, when it is detected that the terminal maintains the output of the local time within the terminal's maintaining ability range, the terminal device data continuous output module outputs the local maintenance time;

[0084] 4. According to the analysis result of the data processing module, when it is detected that the terminal maintains the output of the local time beyond the terminal's maintaining ability, the terminal immediately synchronizes the base station time information, and the terminal device data output module outputs the time information synchronized with the base station;

[0085] 5. According to the analysis result of the data processing module, when it is detected that the variation range of the signal strength value is stable within the set threshold within the terminal's maintaining ability range, it can be determined that the terminal is moving within the information strength range of the same scenario. At this time, the terminal synchronizes the base station time information, and the terminal device data output module outputs the time information synchronized with the base station;

[0086] 6. After the terminal completes time synchronization, it returns to step 1 after completing time synchronization to prepare for the next time synchronization.

[0087] For the air interface timing method of the mobile terminal proposed by the present invention, when the terminal is within the signal strength range of different scenarios, it outputs the local maintenance time to maintain the time synchronization accuracy; when it is detected that the variation range of the signal strength value is stable within the set threshold within the terminal's maintaining ability range, it can be determined that the terminal is moving within the information strength range of the same scenario. At this time, the terminal synchronizes the base station time information; when it is detected that the terminal maintains the output of the local time beyond the terminal's maintaining ability, the terminal immediately synchronizes the base station time information. At the same time, the terminal selects the optimal base station for time synchronization according to the time quality value in the system information broadcast by different base stations.

[0088] As can be seen from the above embodiments, those skilled in the art should understand that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices, can be implemented as software (which can be implemented by computer program code executable by a computing device), firmware, hardware, and their appropriate combinations. In the hardware implementation, the division of the functional modules / units mentioned above does not necessarily correspond to the division of physical components; for example, a physical component can have multiple functions, or a function or step can be executed by several physical components in cooperation. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or be implemented as hardware, or be implemented as an integrated circuit, such as an application-specific integrated circuit.

[0089] In addition, as is well known to those of ordinary skill in the art, a communication medium typically contains computer-readable instructions, data structures, computer program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium. Therefore, the present invention is not limited to any specific combination of hardware and software.

[0090] The above content is a further detailed description of the embodiments of the present invention in conjunction with specific implementation manners, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A method for air interface timing of a mobile terminal, characterized in that, Including: Receiving a broadcast message sent by a base station, where the broadcast message includes a time synchronization message; When the synchronization time source is the time synchronization message, executing a time synchronization policy to determine whether the time accuracy of the base station meets a preset condition; If it is yes, continue to use the time synchronization message as the synchronization time source; If it is no, use the locally maintained time information as the synchronization time source; Wherein, the broadcast message further includes time quality information; The method further includes: selecting a base station with the best time quality as the time synchronization source according to the time quality information.

2. The air interface timing method of the mobile terminal according to claim 1, wherein The executing the time synchronization policy to determine whether the time accuracy of the base station meets the preset condition includes: Real-time collecting and updating the signal strength of the base station, and determining whether the change value of the signal strength is greater than or equal to a preset signal strength change threshold. When the change value of the signal strength is greater than or equal to the preset signal strength change threshold, the time accuracy of the base station does not meet the preset condition, otherwise it meets the preset condition; Or, the mobile terminal real-time collects and updates the signal strength of the base station, and determines whether the signal strength value is greater than or equal to a preset signal strength threshold. When the signal strength value is greater than or equal to the preset signal strength value, the time accuracy of the base station meets the preset condition, otherwise it does not meet the preset condition.

3. The air interface timing method of the mobile terminal according to claim 2, characterized in that, When the time accuracy of the base station does not meet the preset condition, it further includes: Determining whether the locally maintained time information meets an accuracy retention threshold; If it is yes, use the locally maintained time information as the synchronization time source; If it is no, continue to use the time synchronization message as the synchronization time source.

4. The air interface timing method of the mobile terminal according to claim 2, wherein When using the locally maintained time information as the synchronization time source, it further includes: Determining whether the locally maintained time information meets the accuracy retention threshold; If it is yes, continue to use the locally maintained time information as the synchronization time source; If it is no, receive the broadcast message sent by the base station and use the time synchronization message of the base station as the synchronization time source.

5. The air interface timing method of the mobile terminal according to claim 2, characterized in that, When using the time synchronization message as the synchronization time source, it further includes: real-time reading the locally maintained time information and determining whether the locally maintained time information meets the accuracy retention threshold; If it is yes, the locally maintained time information remains unchanged; If it is no, receive the broadcast message sent by the base station and use the time synchronization message of the base station as the synchronization time source.

6. The air interface timing method of the mobile terminal according to any one of claims 3-5, characterized in that, The accuracy retention threshold includes: a retention time length threshold for using the locally maintained time as the time synchronization source.

7. The air interface timing method of the mobile terminal according to any one of claims 1-5, characterized in that, When the time accuracy of the base station meets the preset condition, it further includes: updating the time synchronization message to the locally maintained time information.

8. A mobile terminal, characterized in that, The mobile terminal includes: a processor, a memory and a communication bus; The communication bus is used to realize the connection communication between the processor and the memory; The processor is used to execute one or more programs stored in the memory to implement the steps of the air interface timing method of the mobile terminal as described in any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores one or more computer programs, and the one or more computer programs can be executed by one or more processors to implement the steps of the air interface timing method of the mobile terminal as described in any one of claims 1 to 7.

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