WO2020259320A1

WO2020259320A1 - Clock adjustment method and communication apparatus

Info

Publication number: WO2020259320A1
Application number: PCT/CN2020/095801
Authority: WO
Inventors: 于峰
Original assignee: 华为技术有限公司
Priority date: 2019-06-27
Filing date: 2020-06-12
Publication date: 2020-12-30
Also published as: CN112153731A; CN112153731B

Abstract

Disclosed are a clock adjustment method and a communication apparatus, which relate to the field of communications, can instruct a terminal device to perform clock adjustment at the moment at which a leap second occurs (or the moment at which daylight saving time occurs), thus reducing a time error to a certain extent, and are applicable to a high-precision timing scenario. The method comprises: a terminal device receiving first information from a network device, wherein the first information is used for indicating a clock adjustment type to the terminal device; and the terminal device executing clock adjustment at a first clock adjustment moment according to the first information.

Description

Clock adjustment method and communication device

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office on June 27, 2019, the application number is 201910568689.0, and the application name is "a clock adjustment method and communication device", the entire content of which is incorporated herein by reference Applying.

Technical field

The embodiments of the present application relate to the communication field, and in particular, to a clock adjustment method and communication device.

Background technique

In the wireless time sensitive network (wTSN), the base station can be timed through the air interface protocol, which effectively solves the application limitations and cost issues of the global positioning system (GPS) scenario, and can achieve high-precision timing .

Currently, the base station periodically issues timing information through a system information block (SIB). The SIB message includes time information and leap second adjustment duration. After receiving the SIB, the terminal device can determine the time of the time domain reference point (e.g., frame boundary) according to the time information in the SIB and the leap second adjustment duration, and then can calculate each time domain position (e.g., Frame boundary, symbol boundary, etc.) time.

In fact, there may be leap second jumps at some time domain locations. In the above scheme, the terminal device will ignore leap second jumps when calculating the time of other time domain locations based on the time of the time domain reference point, resulting in a certain amount of time. Errors affect the application of high-precision timing scenarios.

Summary of the invention

The embodiments of the present application provide a clock adjustment method and communication device, which can instruct a terminal device to adjust the clock at the time when the leap second occurs (or when the daylight saving time occurs), which reduces time error to a certain extent, and is suitable for high-precision timing scenarios.

In order to achieve the foregoing objectives, the following technical solutions are adopted in the embodiments of this application:

In a first aspect, a clock adjustment method is disclosed, including: a terminal device receives first information from a network device, the first information is used to indicate a clock adjustment type to the terminal device; and the terminal device adjusts the time at the first clock according to the first information Perform clock adjustment.

In the method provided by the embodiment of the present application, the terminal may determine the first clock adjustment time according to the first information, for example, the leap second adjustment time, that is, the time when the leap second occurs, and perform clock adjustment at the clock adjustment time. The terminal device determines the time of the time domain reference point according to the system message. When calculating the time of other time domain locations based on the time of the time domain reference point, the corresponding clock adjustment can be performed at the corresponding time domain location, for example, positive leap second adjustment, Furthermore, the time of other time domain positions is calculated according to the adjusted clock, which reduces the time error to a certain extent, and is suitable for high-precision timing scenarios.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the first information includes leap second notice information, and the leap second notice information is used to indicate a leap second adjustment type.

In the embodiment of the present application, the type of leap second adjustment that is about to be performed can be notified to the terminal device, so that the terminal device can perform the leap second adjustment at the corresponding time, thereby reducing the time error.

With reference to the first possible implementation of the first aspect, in the second possible implementation of the first aspect, the terminal device performs clock adjustment at the first clock adjustment time according to the first information, including: according to the leap second notice Information, perform leap second adjustment of the type indicated by the leap second advance information at the first clock adjustment time.

In the embodiment of the present application, the terminal device can perform corresponding leap second adjustment at the time domain position corresponding to the first clock adjustment time according to the leap second notice information, and then calculate the time in other time domain positions based on the adjusted clock, which can reduce the time error.

With reference to the first aspect, in the first possible implementation manner of the first aspect, the first information includes daylight saving time advance information, and the daylight saving time advance information is used to indicate the type of daylight saving time adjustment.

In the embodiment of the present application, the terminal device can be notified of the type of daylight saving time adjustment to be performed, so that the terminal device can adjust the daylight saving time at the corresponding time, thereby reducing time errors.

In combination with the third possible implementation manner of the first aspect, in the fourth possible implementation manner of the first aspect, the terminal device performs clock adjustment at the first clock adjustment time according to the first information, including: the terminal device performs clock adjustment according to the daylight saving time The time advance information is to perform the daylight saving time adjustment of the type indicated by the daylight saving time advance information at the first clock adjustment time.

In the embodiment of the present application, the terminal device can perform the corresponding daylight saving time adjustment at the time domain position corresponding to the first clock adjustment time according to the daylight saving time forecast information, and then calculate the time in other time domain positions according to the adjusted clock, which can reduce the time error.

In combination with the fourth possible implementation of the first aspect, in the fifth possible implementation of the first aspect, the daylight saving time forecast information includes type information and time information; the time information is used to indicate the first duration, and the type information is used The first time length is adjusted forward or the first time length is adjusted backward for indicating the end time relative to the current time unit; wherein, the current time unit is the time unit at which the terminal device receives the first information, and the first clock adjustment time is The end time of the current time unit.

In the embodiment of this application, the type of daylight saving time adjustment and the duration of the adjustment can be indicated to the terminal device through two pieces of information, so that the terminal can correctly adjust the clock at the corresponding time domain position, and calculate other time domain positions based on the adjusted clock. On time, can reduce time error.

In combination with the fourth possible implementation of the first aspect, in the sixth possible implementation of the first aspect, the daylight saving time forecast information includes type information, and the type information is used to indicate that the end time relative to the current time unit is forward Adjust the first duration, or adjust the second duration forward relative to the end time of the current time unit, or adjust the first duration backward relative to the end time of the current time unit, or adjust backward relative to the end time of the current time unit The second time length, or the clock is not adjusted; where the current time unit is the time unit at which the terminal device receives the first information, and the first clock adjustment time is the end time of the current time unit.

In the embodiment of the present application, the type of daylight saving time adjustment and the duration of the adjustment can be indicated to the terminal device through a piece of information, so that the terminal can correctly adjust the clock at the corresponding time domain position, and calculate other time domain positions based on the adjusted clock. Time can reduce time error.

With reference to the first aspect or the first or second possible implementation of the first aspect, in a seventh possible implementation of the first aspect, the method further includes: the terminal device determines the first clock adjustment time; A clock adjustment time is the first clock adjustment time after the terminal device receives the first information; or, the first clock adjustment time is the clock adjustment time closest to the time when the terminal device receives the first information.

With reference to the first aspect or any one of the first to seventh possible implementation manners of the first aspect, in the eighth possible implementation manner of the first aspect, the method further includes: receiving second information from a network device , The second information is used to instruct the terminal device to receive the first information.

In the embodiment of the present application, the terminal device can be instructed to receive the first information through the second information, reducing the terminal device’s miss of the first information. The terminal device can receive the first information before the leap second (or daylight saving time) occurs, so that the corresponding The time domain position is correctly adjusted to reduce the time error.

In a second aspect, a clock adjustment method is disclosed, including: a network device determines first information, the first information is used to indicate a clock adjustment type to a terminal device; and the first information is sent to the terminal device.

With reference to the second aspect, in the first possible implementation manner of the second aspect, the first information includes leap second notice information, and the leap second notice information is used to indicate the leap second adjustment type.

With reference to the second aspect, in a second possible implementation manner of the second aspect, the first information includes daylight saving time advance information, and the daylight saving time advance information is used to indicate the type of daylight saving time adjustment.

In combination with the second possible implementation of the second aspect, in the third possible implementation of the second aspect, the daylight saving time forecast information includes type information and time information; time information is used to indicate the first duration, and type information is used The first time length is adjusted forward or the first time length is adjusted backward for indicating the end time relative to the current time unit; wherein, the current time unit is the time unit at which the terminal device receives the first information, and the first clock adjustment time is The end time of the current time unit.

In combination with the second possible implementation of the second aspect, in the fourth possible implementation of the second aspect, the daylight saving time forecast information includes type information, and the type information is used to indicate that the end time relative to the current time unit is forward Adjust the first duration, or adjust the second duration forward relative to the end time of the current time unit, or adjust the first duration backward relative to the end time of the current time unit, or adjust backward relative to the end time of the current time unit The second time length, or the clock is not adjusted; where the current time unit is the time unit at which the terminal device receives the first information, and the first clock adjustment time is the end time of the current time unit.

With reference to the second aspect or any one of the first to fourth possible implementation manners of the second aspect, in the fifth possible implementation manner of the second aspect, the method further includes: sending second information to the terminal device , The second information is used to instruct the terminal device to receive the first information.

In a third aspect, a communication device is disclosed, which may be a terminal device or a chip in a terminal device. The communication device includes a communication unit for receiving first information from a network device, and the first information is used for indicating a clock to the terminal device. Adjustment type; a processing unit for performing clock adjustment at the first clock adjustment time according to the first information.

With reference to the third aspect, in the first possible implementation manner of the third aspect, the first information includes leap second notice information, and the leap second notice information is used to indicate the leap second adjustment type.

With reference to the first possible implementation manner of the third aspect, in the second possible implementation manner of the third aspect, the processing unit is specifically configured to execute the leap second notice information at the first clock adjustment time according to the leap second notice information Leap second adjustment for the indicated type.

With reference to the third aspect, in a third possible implementation manner of the third aspect, the first information includes daylight saving time advance information, and the daylight saving time advance information is used to indicate the type of daylight saving time adjustment.

In combination with the third possible implementation manner of the third aspect, in the fourth possible implementation manner of the third aspect, the processing unit is specifically configured to execute the daylight saving time forecast information at the first clock adjustment time according to the daylight saving time forecast information Daylight saving time adjustment of the indicated type.

In the fourth possible implementation manner in combination with the third aspect, in the fifth possible implementation manner of the third aspect, the daylight saving time forecast information includes type information and time information; the time information is used to indicate the first duration, type information It is used to indicate that the first time length is adjusted forward or the first time length is adjusted backward relative to the end time of the current time unit; wherein, the current time unit is the time unit at which the terminal device receives the first information, and the first clock adjustment time Is the end time of the current time unit.

In combination with the fourth possible implementation manner of the third aspect, in the sixth possible implementation manner of the third aspect, the daylight saving time forecast information includes type information, and the type information is used to indicate that the end time relative to the current time unit is forward Adjust the first duration, or adjust the second duration forward relative to the end time of the current time unit, or adjust the first duration backward relative to the end time of the current time unit, or adjust backward relative to the end time of the current time unit The second time length, or the clock is not adjusted; where the current time unit is the time unit at which the terminal device receives the first information, and the first clock adjustment time is the end time of the current time unit.

With reference to the third aspect or the first or second possible implementation manner of the third aspect, in the seventh possible implementation manner of the third aspect, the processor is further configured to determine the first clock adjustment time; The adjustment time is the first clock adjustment time that appears after the terminal device receives the first information; or, the first clock adjustment time is the clock adjustment time closest to the time when the terminal device receives the first information.

With reference to the third aspect or any one of the first to seventh possible implementation manners of the third aspect, in the eighth possible implementation manner of the third aspect, the communication unit is further configured to receive the first to the seventh possible implementation manner from the network device Second information, the second information is used to instruct the terminal device to receive the first information.

In a fourth aspect, a communication device is disclosed, including: a processing unit for determining first information, the first information for indicating a clock adjustment type to a terminal device; and a communication unit for sending the first information to the terminal device.

With reference to the fourth aspect, in the first possible implementation manner of the fourth aspect, the first information includes leap second notice information, and the leap second notice information is used to indicate the leap second adjustment type.

With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, the first information includes daylight saving time advance information, and the daylight saving time advance information is used to indicate the type of daylight saving time adjustment.

In combination with the second possible implementation of the fourth aspect, in the third possible implementation of the fourth aspect, the daylight saving time forecast information includes type information and time information; the time information is used to indicate the first duration, and the type information is used The first time length is adjusted forward or the first time length is adjusted backward for indicating the end time relative to the current time unit; wherein, the current time unit is the time unit at which the terminal device receives the first information, and the first clock adjustment time is The end time of the current time unit.

In combination with the second possible implementation manner of the fourth aspect, in the fourth possible implementation manner of the fourth aspect, the daylight saving time forecast information includes type information, and the type information is used to indicate that the end time relative to the current time unit is forward Adjust the first duration, or adjust the second duration forward relative to the end time of the current time unit, or adjust the first duration backward relative to the end time of the current time unit, or adjust backward relative to the end time of the current time unit The second time length, or the clock is not adjusted; where the current time unit is the time unit at which the terminal device receives the first information, and the first clock adjustment time is the end time of the current time unit.

With reference to the fourth aspect or any one of the first to fourth possible implementation manners of the fourth aspect, in the fifth possible implementation manner of the fourth aspect, the communication unit is further configured to send the first to the terminal device Second information, the second information is used to instruct the terminal device to receive the first information.

In a fifth aspect, a communication device is disclosed, including a processor, which is coupled with a memory; the memory is used to store a computer program; the processor is used to execute the computer program stored in the memory, so that the device executes the first Aspect, any one possible implementation manner of the first aspect, the second aspect, and any one possible implementation manner of the second aspect.

In a sixth aspect, a readable storage medium is disclosed, including a program or instruction. When the program or instruction is executed by a processor, such as the first aspect, any possible implementation of the first aspect, the second aspect, and the first aspect The method described in any one of the possible implementations in the second aspect is executed.

In a seventh aspect, a wireless communication device is disclosed, including: instructions stored in the wireless communication device; when the wireless communication device implements any of the foregoing fourth aspect and the fourth aspect, or any of the foregoing third aspect and the third aspect When running on the network device described in an implementation manner, the network device is made to execute the foregoing first aspect, any one possible implementation manner of the first aspect, the second aspect, and any one possible implementation manner of the second aspect. Methods. The wireless communication device is a chip.

Description of the drawings

FIG. 1 is an architecture diagram of a communication system provided by an embodiment of this application;

Figure 2 is a schematic diagram of existing clock synchronization provided by an embodiment of the application;

3A is a structural block diagram of a communication device provided by an embodiment of this application;

FIG. 3B is another structural block diagram of the communication device provided by an embodiment of the application;

4 is a schematic flowchart of a clock adjustment method provided by an embodiment of the application;

FIG. 5 is a schematic diagram of clock adjustment time provided by an embodiment of the application;

FIG. 6 is a schematic diagram of another flow of a clock adjustment method provided by an embodiment of the application;

FIG. 7 is a schematic diagram of leap second adjustment provided by an embodiment of the application;

FIG. 8 is another structural block diagram of a communication device provided by an embodiment of the application;

FIG. 9 is another structural block diagram of a communication device provided by an embodiment of the application;

FIG. 10 is another structural block diagram of a communication device provided by an embodiment of the application;

FIG. 11 is another structural block diagram of a communication device provided by an embodiment of this application.

Detailed ways

The technical solution in this application will be described below in conjunction with the drawings.

First, the terms involved in the embodiments of this application are explained.

(1) Universal time

Universal time can also be called Greenwich mean solar time. With the rotation of the earth as the measurement standard, universal time can express the speed of the earth's rotation. The rotation of the earth is actually uneven, so universal time is an uneven time.

(2) Coordinated universal time (UTC)

UTC is based on the second length of atomic time and is as close to the universal time as possible in time, which is the standard time in radio communication. In order to ensure strict synchronization between UTC and atomic time, UTC can be adjusted for a whole second, for example, UTC is increased by one second or removed by one second.

(3) Global Positioning System (GPS) time

The atomic time (AT) second length is used as the time reference, and the second does not jump after startup. Unlike UTC, GPS time is continuous.

(4) Leap second

Due to the non-uniformity of the earth’s rotation and long-term chronicity, an error will occur between UTC time and universal time. In order to adjust the error between UTC and universal time to make UTC time closer to universal time, UTC time can be increased by 1 second Or reduce by 1 second, this 1 second can be called a leap second.

Leap second adjustment usually occurs at the end of the Gregorian calendar year and/or the end of June of the Gregorian calendar. Leap seconds are divided into positive leap seconds and negative leap seconds. For example, taking June as an example, when the negative leap second is adjusted, the last minute of June 30 is 59 seconds; when the positive leap second is adjusted, the last minute of June 30 is 61 seconds.

Since GPS time is continuous, the difference between UTC and GPS time is caused by UTC's leap second adjustment.

(5) Daylight saving time

Daylight saving time (DST) is a time system formulated to save energy. The UTC time can be adjusted forward or backward. For example, in the summer when the sunrise is relatively early, the clock can be adjusted forward by one hour, so that people can go to bed early and get up early to make full use of light resources and save electricity for lighting.

Figure 1 shows a schematic diagram of a communication system to which the technical solution provided by the present application is applicable. The communication system may include one or more network devices 100 (only one is shown) and one or more network devices 100 connected to the network device 100. Multiple terminal devices 200. FIG. 1 is only a schematic diagram, and does not constitute a limitation on the application scenarios of the technical solutions provided in this application.

The network device 100 may be a transmission reception point (TRP), a base station, a relay station, or an access point. The network device 100 may be a network device in a 5G communication system or a network device in a future evolution network; it may also be a wearable device or a vehicle-mounted device. In addition, it can also be the base transceiver station (BTS) of the global system for mobile communication (GSM) or code division multiple access (CDMA) network, or broadband The NB (NodeB) in wideband code division multiple access (WCDMA) may also be the eNB or eNodeB (evolutional NodeB) in long term evolution (LTE). The network device 100 may also be a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario. This application will take a base station as an example below for description.

The terminal device 200 may be user equipment (UE), access terminal equipment, UE unit, UE station, mobile station, mobile station, remote station, remote terminal equipment, mobile equipment, UE terminal equipment, wireless communication equipment, UE Agent or UE device, etc. The access terminal equipment can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and a wireless Communication function handheld devices, computing devices, or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks, or future evolution public land mobile network (PLMN) networks Terminal equipment, etc.

In the communication system shown in FIG. 1, the network device 100 can send system messages to the terminal device 200, and the terminal device 200 can adjust the local clock according to the system message sent by the network device 100 to perform clock synchronization.

In a possible implementation manner, the network device sends time information (timeInfo-r11) to the terminal device through a system information block (SIB) 16. The time granularity indicated by timeInfo-r11 is 10ms. The UTC time calculated by the terminal device according to timeInfo-r11 is xx year xx month xx day xx hour xx minute xx second yy millisecond, where yy is a multiple of 10. The UTC time corresponds to a time domain reference point (hereinafter referred to as the first time domain reference point), that is, the time of the time domain reference point is the UTC time calculated by the terminal device according to timeInfo-r11. In the cellular system using frame synchronization technology, the time domain reference point can be a certain frame boundary. For example, the reference point may be the frame boundary of the frame where SIB16 is located, or the frame boundary that appears first after SIB16.

In another possible implementation manner, IE timeReferenceInfo-r15 information element is added to SIB16 to indicate high-precision GPS time information, and the time granularity indicated by IE timeReferenceInfo-r15 reaches 0.25 us. The GPS time that the terminal device can calculate according to the time information is xx year xx month xx day xx hour xx minute xx second xx millisecond zz microsecond, where zz is a multiple of 0.25. Similarly, the GPS time corresponds to a time domain reference point (hereinafter referred to as the first time domain reference point), that is, the time of the time domain reference point is the GPS time calculated by the terminal device according to IE timeReferenceInfo-r15. The difference is that the reference point is indicated by referenceSFN-r15 in IE timeReferenceInfo-r15.

It should be noted that the time domain reference point is a time domain position in the time domain, and the time domain position described in the embodiment of the present application may be a boundary of a time unit in the time domain. Among them, the time unit may be a system frame, a symbol, etc., the time domain position may be a frame boundary, a symbol boundary, and the frame boundary may be a system frame boundary.

It is understandable that the "symbols" in the embodiments of the present application may include but are not limited to any of the following: orthogonal frequency division multiplexing (OFDM) symbols, discrete Fourier transform extended orthogonal frequency division Multiplexing (discrete fourier transform spread orthogonal frequency division multiplexing, DFT-s-OFDM), universal filtered multi-carrier (UFMC) symbols, filter-band multi-carrier (FBMC) symbols , Generalized frequency-division multiplexing (GFDM) symbols, etc. The system frame can be called a radio frame. In the LTE system, the time length of the system frame can be 10 milliseconds, one system frame is composed of 20 time slots, each time slot is 0.5 milliseconds, and two time slots are one subframe, that is, the system frame includes There are 10 subframes, and the length of each subframe is 1 millisecond. In the new redio (NR) system, the frame structure is different from that of the LTE system. A radio frame is 10ms in length, and each radio frame is composed of 10 subframes with a length of 1ms. A time slot can consist of 14 Symbol composition. Among them, the symbol length is related to subcarrier spacing (SCS). Refer to Table 1 for details.

Table 1

As shown in Table 1, the subcarrier configuration "0", "1", "2", "3", and "4" respectively represent different subcarrier spacing configurations; the subcarrier spacing unit can be KHz; the cyclic prefix (CP) includes Normal CP and extended CP; the number of symbols per time slot represents the number of symbols included in each time slot; the number of time slots per frame represents the number of time slots included in each radio frame; the number of time slots per subframe represents The number of time slots included in each subframe. For example, when the SCS is 15kHz, 30kHz, 60kHz, 120kHz, 240kHz and the cyclic prefix is normal, the number of time slots per subframe corresponds to: 1, 2, 4, 8, 16 respectively.

In a possible implementation, after determining the time of the first time domain reference point, the terminal may also calculate the time of other time domain locations in the time domain based on the time of the first time domain reference point to complete local clock synchronization. For example, referring to FIG. 2, the terminal device may calculate the time of the boundary of the time unit in the time domain, for example, the frame boundary, the symbol boundary, and so on. Assuming that the terminal determines the UTC time of the frame boundary of frame 10 according to SIB16, it can also calculate the UTC time of other time domain positions based on the UTC time of the frame boundary of frame 10. For example, the UTC time of the frame boundary of frame 10 is: June 30, 2019, 23:59:23, 810 milliseconds, the frame boundary of frame 9 and the frame boundary of frame 10 are 10ms apart, and the terminal can determine that the UTC time of the frame boundary of frame 9 is greater than the frame boundary of frame 10. The time is 10 milliseconds earlier, that is, 800 milliseconds at 23:59:23, June 30, 2019.

In fact, there may be leap second adjustments (jumping) in some time domain positions. In the above scheme, the terminal device does not perceive the actual time domain position of the leap second adjustment, and the terminal device ignores the leap second when calculating the time of the time domain position. Adjustment will also produce a certain time error, which will affect the application of high-precision timing scenarios. For example, suppose that the frame boundary of the above frame N is adjusted for positive leap seconds, and the UTC time needs to be reduced by 1 second. Assume that the time of the frame boundary of the frame N determined by the terminal device is June 30, 2019, 23:59:58.1000 In milliseconds, according to the prior art scheme, the terminal equipment calculates the frame boundary time of the (N+1) frame as June 30, 2019, 23:59:59, 10 ms. In fact, due to the positive leap second adjustment, the last hour on June 30 is only 58 seconds, and the frame boundary of frame N directly jumps to July 1, 2019 at 0: 0: 0: 0: 0. 0 ms. Therefore, (N+1 The time of the frame boundary of the frame number) should be July 1, 2019, 0: 0: 0: 0, 10 ms.

The embodiment of the application provides a clock adjustment method. A terminal device receives first information from a network device. The first information is used to indicate a clock adjustment type to the terminal device; Perform clock adjustment at the time of clock adjustment. It can be seen that in the method provided in the embodiment of the present application, the terminal can determine the first clock adjustment time according to the first information, for example, the leap second adjustment time, that is, the time when the leap second occurs, and perform clock adjustment at the clock adjustment time. The terminal device determines the time of the time domain reference point according to the system message. When calculating the time of other time domain locations based on the time of the time domain reference point, the corresponding clock adjustment can be performed at the corresponding time domain location, for example, positive leap second adjustment, Furthermore, the time of other time domain positions is calculated according to the adjusted clock, which reduces the time error to a certain extent, and is suitable for high-precision timing scenarios.

In the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with basically the same function and effect. Those skilled in the art can understand that words such as "first" and "second" do not limit the number and execution order.

The terminal described in the embodiment of the present application may be implemented by the communication device 310 in FIG. 3A. FIG. 3A shows a schematic diagram of the hardware structure of a communication device 310 provided by an embodiment of the application. The communication device 310 includes a processor 3101, a communication line 3102, a memory 3103, and at least one communication interface (in FIG. 3A, it is only an example and the communication interface 3104 is included as an example for description).

The processor 3101 may be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more programs for controlling the execution of the program of this application. integrated circuit.

The communication line 3102 may include a path to transmit information between the aforementioned components.

The communication interface 3104 communicates with other devices or communication networks through any device such as a transceiver, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.

The memory 3103 can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions The dynamic storage device can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, optical disc storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be used by a computer Any other media accessed, but not limited to this. The memory can exist independently and is connected to the processor through a communication line 3102. The memory can also be integrated with the processor.

Wherein, the memory 3103 is used to store computer-executed instructions for executing the solution of the present application, and the processor 3101 controls the execution. The processor 3101 is configured to execute computer-executable instructions stored in the memory 3103, so as to implement the intention processing method provided in the following embodiments of the present application.

Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application program code, which is not specifically limited in the embodiments of the present application.

In a specific implementation, as an embodiment, the processor 3101 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 3A.

In a specific implementation, as an embodiment, the communication device 310 may include multiple processors, such as the processor 3101 and the processor 3108 in FIG. 3A. Each of these processors can be a single-CPU (single-CPU) processor or a multi-core (multi-CPU) processor. The processor here may refer to one or more devices, circuits, and/or processing cores for processing data (for example, computer program instructions).

In a specific implementation, as an embodiment, the communication apparatus 310 may further include an output device 3105 and an input device 3106. The output device 3105 communicates with the processor 3101 and can display information in a variety of ways. For example, the output device 3105 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait. The input device 3106 communicates with the processor 3101 and can receive user input in a variety of ways. For example, the input device 3106 may be a mouse, a keyboard, a touch screen device, or a sensor device.

The aforementioned communication device 310 may be a general-purpose device or a special-purpose device. In a specific implementation, the communication device 310 may be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, an embedded device, or a similar structure in FIG. 3A equipment. The embodiment of the present application does not limit the type of the communication device 310.

Figure 3B is a schematic structural diagram of a network device. The structure of the network device 320 may refer to the structure shown in FIG. 3B.

The network device includes at least one processor 3201, at least one memory 3202, at least one transceiver 3203, at least one network interface 3204, and one or more antennas 3205. The processor 3201, the memory 3202, the transceiver 3203 and the network interface 3204 are connected, for example, by a bus. The antenna 3205 is connected to the transceiver 3203. The network interface 3204 is used to connect the network device to other communication devices through the communication link, for example, the network device is connected to the core network element through the S1 interface. In the embodiment of the present application, the connection may include various interfaces, transmission lines, or buses, etc., which is not limited in this embodiment.

The processor in the embodiment of the present application, for example the processor 3201, may include at least one of the following types: a general-purpose central processing unit (Central Processing Unit, CPU), a digital signal processor (Digital Signal Processor, DSP), a microprocessor, Application-Specific Integrated Circuit (ASIC), Microcontroller Unit (MCU), Field Programmable Gate Array (FPGA), or integrated circuit used to implement logic operations . For example, the processor 3201 may be a single-CPU (single-CPU) processor or a multi-core (multi-CPU) processor. The at least one processor 3201 may be integrated in one chip or located on multiple different chips.

The memory in the embodiment of the present application, such as the memory 3202, may include at least one of the following types: read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory Random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, and may also be electrically erasable programmable read-only memory (Electrically erasable programmabler-only memory, EEPROM). In some scenarios, the memory can also be a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.) , A magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.

The memory 3202 may exist independently and is connected to the processor 3201. Optionally, the memory 3202 may also be integrated with the processor 3201, for example, integrated in one chip. Wherein, the memory 3202 can store program codes for executing the technical solutions of the embodiments of the present application, and the processor 3201 controls the execution. Various types of computer program codes executed can also be regarded as driver programs of the processor 3201. For example, the processor 3201 is configured to execute computer program codes stored in the memory 3202, so as to implement the technical solutions in the embodiments of the present application.

The transceiver 3203 may be used to support the reception or transmission of radio frequency signals between the network device and the terminal, and the transceiver 3203 may be connected to the antenna 3205. Specifically, one or more antennas 3205 can receive radio frequency signals, and the transceiver 3203 can be used to receive the radio frequency signals from the antennas, convert the radio frequency signals into digital baseband signals or digital intermediate frequency signals, and convert the digital baseband signals or The digital intermediate frequency signal is provided to the processor 3201 so that the processor 3201 performs further processing on the digital baseband signal or digital intermediate frequency signal, such as demodulation processing and decoding processing. In addition, the transceiver 3203 can be used to receive a modulated digital baseband signal or digital intermediate frequency signal from the processor 3201, and convert the modulated digital baseband signal or digital intermediate frequency signal into a radio frequency signal, and pass it through one or more antennas 3205 Sending the radio frequency signal. Specifically, the transceiver 3203 may selectively perform one or more stages of down-mixing processing and analog-to-digital conversion processing on the radio frequency signal to obtain a digital baseband signal or a digital intermediate frequency signal. The order of precedence is adjustable. The transceiver 3203 can selectively perform one or more stages of up-mixing processing and digital-to-analog conversion processing on the modulated digital baseband signal or digital intermediate frequency signal to obtain a radio frequency signal. The up-mixing processing and the digital-to-analog conversion processing The order of precedence is adjustable. Digital baseband signals and digital intermediate frequency signals can be collectively referred to as digital signals. The transceiver may be called a transceiver circuit, a transceiver unit, a transceiver device, a transmitter circuit, a transmitter unit, or a transmitter device, etc.

The embodiment of the present application provides a time service method. As shown in FIG. 4, the method includes the following steps:

401. A terminal device receives first information from a network device, where the first information is used to indicate a clock adjustment type to the terminal device.

Specifically, the first information may be air interface information. In addition, the first information may be used to notify the terminal device of the clock adjustment type; for example, the first information may notify the terminal device of positive leap second adjustment, negative leap second adjustment, daylight saving time adjustment, etc.

Alternatively, the first information may implicitly indicate the clock jump time, and the terminal may determine the clock jump time by receiving the first information from the network device, and then the terminal device may perform clock adjustment at the clock jump time;

Or, the first information is used to indicate the way or rule of clock adjustment to the terminal device.

It should be noted that clock adjustment can also be called clock jump. The so-called clock jump refers to an abnormal clock change. For example, a clock change from 18:23:58 to 18:23:59 is a normal clock change, and a direct adjustment from 18:23:58 to 19:23:58 is an abnormal clock change, which can be called one time Clock adjustment or clock jump.

The embodiments of the present application provide two implementation possibilities of the first information, which specifically include:

In the first type, the first information includes leap second notice information, and the leap second notice information is used to predict (or indicate) the leap second adjustment type.

Specifically, the leap second adjustment type includes a positive leap second adjustment type, a negative leap second adjustment, or no leap second adjustment. The leap second notice information may be two bits, indicating three different leap second adjustment types. For example, 00 means no leap second adjustment is performed, 01 means positive leap second adjustment is performed, and 10 means negative leap second adjustment is performed.

It should be noted that the positive leap second refers to 59 seconds at the end of the Gregorian calendar year or the last minute of the June end of the Gregorian calendar. The positive leap second adjustment is performed, that is, it jumps directly at 58 seconds at the end of the Gregorian calendar year or the last minute of the June end of the Gregorian calendar. To the next minute. For example, the positive leap second adjustment was performed in June 2018, that is, it jumped directly from 23:59:58 on June 30, 2018 to 00:00:00 on July 1, 2018. Suppose that the terminal device determines the frame boundary of frame N as the first clock adjustment time according to the first information: June 30, 2018 at 23:59:58 and 1000 milliseconds, the frame boundary of frame N is adjusted for leap seconds, frame N is The frame boundary jumps directly to July 1, 2018, 0:00:00, 00 ms, then the time of the (N+1) frame boundary should be July 1, 2018, 0: 00: 00, 10 ms. .

Negative leap second means that the last minute at the end of the Gregorian calendar year or the end of June of the Gregorian calendar is 61 seconds, and the negative leap second adjustment is performed, that is, the clock will jump to the next after it runs for 61 seconds at the end of the Gregorian year or the last minute of the June end of the Gregorian calendar. minute. For example, the negative leap second adjustment is performed in June 2018, that is, the clock runs for 60 seconds at 23:59 on June 30, 2018, and jumps to June 30, 2018 at 23:59:59 on June 30, 2018. At 23:59:60 on the 30th of the month, after 23:59:60 on June 30, 2018, the clock will run normally until 0:00:00 on July 1, 2018. Suppose that the terminal device determines that the frame boundary of frame M is the first clock adjustment time according to the first information: June 30, 2018 at 23:59:59 and 1000 milliseconds, the frame boundary of frame M undergoes leap second adjustment, frame M The frame boundary jumps directly to June 30, 2018, 23:59:60, 00 milliseconds, then the time of the (M+1) frame boundary should be June 30, 2018, 23:59:60, 10 milliseconds .

In the second type, the first information includes daylight saving time forecast information, and the daylight saving time forecast information is used to indicate the type of daylight saving time adjustment.

In a possible implementation, the daylight saving time notice information includes type information and time information. The time information is used to indicate the first duration. The type information is used to indicate that the first time length is adjusted forward or the first time length is adjusted backward relative to the end time of the current time unit. Wherein, the current time unit is a time unit at the moment when the terminal device receives the first information. In addition, adjusting the first forward may be understood as adjusting the clock earlier by the first duration, and adjusting the first backward may be understood as adjusting the clock later by the first duration.

For example, the time unit may be an hour, and the current time unit may be an hour at the moment when the terminal device receives the first information. For example, the terminal device receives the first information at 20:35:23, the current time unit is 20 o'clock, and the end time of the current time unit is the end time of 20:59:59. The time unit can also be "day", for example, the terminal device received the first message on August 1, 2019, the current time unit is the day "August 1st", and the end time of the current time unit is August 2019 The end time of the 1st, that is, the end of August 1, 2019 at 23:59:59. The time unit may also be "second" or "minute", and the embodiment of the present application does not limit the specific implementation of the time unit.

The time information can be N bits, and N can be an integer greater than or equal to 0, and can indicate a time length of 1 to 2 ^N. In addition, the granularity of the first duration may be the same as the granularity of the time unit. For example, the time unit is an hour, and N bits of time information can indicate 1 to 2 ^N hours. The embodiment of the present application does not limit the specific implementation of the time information, as long as the duration can be indicated.

Optionally, the time information in the first information may be blank, and the first information indicates that the terminal device does not perform daylight saving time adjustment.

The type information may be 1 bit. When the 1 bit is the first value, the daylight saving time adjustment type indicated by the type information is "adjust the first duration forward relative to the end time of the current time unit." Two values, the type of daylight saving time adjustment indicated by the type information is "adjust the first time length backward relative to the end time of the current time unit". For example, the first value is "0" and the second value is "1"; or, the first value is "1" and the second value is "0". The embodiment of the present application does not limit the specific implementation of the type information, and it is sufficient to indicate different types of daylight saving time adjustments.

Take the first value as "0" and the second value as "1" as an example. Assuming that the time information is "1", it indicates that the first duration is 2 hours; the type information is "0", indicating that the clock is adjusted forward. Duration: The terminal device receives the first message at 20:35:23, the current time unit is 20 o'clock, and the terminal device jumps to 19 o'clock after the local clock runs to the end of 20:59:59 in the current time unit 0 minutes and 0 seconds. After 19:00:00, the clock of the terminal device was running normally. Suppose that the time when the terminal device receives the first information is 20:59:23 on August 12, 2018, and the clock adjustment time is the end time of the last second at 20 o'clock. For example, the frame boundary of frame X is the first clock adjustment time : At 20:59:59 on August 12, 2018, 1000 milliseconds, the frame boundary of frame M is adjusted for daylight saving time, and the frame boundary of frame M directly jumps to 20:00:00 on August 12, 2018. Milliseconds, then the frame boundary time of the frame number (M+1) should be 20:00:00 on August 12, 2018 and 10 ms.

In another possible implementation manner, the daylight saving time notice information includes type information, and the type information is used to indicate that the first time length is adjusted forward relative to the end time of the current time unit, or relative to the end time of the current time unit Adjust the second duration forward, or adjust the first duration backward relative to the end time of the current time unit, or adjust the second duration backward relative to the end time of the current time unit, or do not adjust the clock.

In this implementation manner, the network device does not indicate the specific duration, and the default duration for the terminal device to perform daylight saving time adjustment can be the first duration or the second duration. Combined with the type information indicated by the network device, the terminal determines whether to adjust the first duration or the second duration. Two hours, and whether to adjust the clock forward or backward.

Optionally, the type information may be 3 bits, and different state values of 3 bits represent different daylight saving time adjustment types. 3 bits can have 8 different status values. Any 5 different status values of these 8 status values can be used to indicate the above 5 types of daylight saving time adjustment, that is, to adjust the first time relative to the end time of the current time unit. One hour, the second duration is adjusted forward relative to the end time of the current time unit, the first duration is adjusted backward relative to the end time of the current time unit, the first duration is adjusted backward relative to the end time of the current time unit , Do not adjust the clock.

For example, the status value of 3 bits is "000", the daylight saving time adjustment type indicated by the type information is "no clock adjustment"; the status value of 3 bits is "001", and the daylight saving time adjustment type indicated by the type information is "relative to current The end time of the time unit is adjusted forward by the first duration"; the 3-bit status value is "010", and the daylight saving time adjustment type indicated by the type information is "adjust the second duration forward relative to the end time of the current time unit"; 3 The bit status value is "011", the daylight saving time adjustment type indicated by the type information is "adjust the first duration backward relative to the end time of the current time unit"; the 3 bit status value is "100", and the daylight saving time indicated by the type information The time adjustment type is "adjust the second duration backward relative to the end time of the current time unit";

Optionally, the first duration may be 1 hour, and the second duration may be 2 hours.

The above example is only used as a possible implementation manner, and does not limit the specific implementation of the type information of the embodiments of the present application.

It should be noted that the first information may be sent by the network device through broadcast or unicast. For example, network equipment periodically broadcasts. In the case of a large number of terminals, broadcasting the first information can save transmission resources.

Alternatively, the network device may also send the first information to the terminal device in a one-to-one unicast manner, and the unicast transmission is more flexible. The reliability of the hybrid automatic repeat request (HARQ) unicast transmission method can also be used. For example, the terminal may send a 1-bit ACK to the network device to indicate that the first information was successfully received, or send a 1-bit NACK to the network device to indicate that the first information was not successfully received, and the network device may also retransmit the first information to the terminal.

In addition, the first information may also be sent in a multicast manner, which is not limited in the embodiment of the present application. For example, the network device obtains information of a group of terminal devices (for example, grouped UE) from a core network or an application server, and sends the first information to the group of terminal devices.

In a possible implementation manner, the network device informs the terminal device of the time-frequency resource location for sending the first information and the corresponding modulation and coding strategy (modulation and coding scheme, MCS) through a radio resource control (radio resource control, RRC) reconfiguration message. ), the terminal device receives the first information at the corresponding resource location.

Optionally, the network device informs the terminal device of the first multicast identifier through a broadcast message or an RRC reconfiguration message, and the first multicast identifier may be the identifier of the group where the terminal device is located.

The network device may also use the first multicast identifier to scramble the downlink control information (DCI) used for the first information, and accordingly, the terminal device uses the first multicast identifier to descramble the first information for scheduling the first information DCI. The terminal device may also receive the first information at the corresponding time-frequency resource location according to the indication of the DCI.

Optionally, the network device informs the terminal device of the second multicast identifier through a broadcast message or an RRC reconfiguration message. The second multicast identifier is used to identify the group where the terminal device is located, and may be the same as the first multicast identifier.

The network device may also use the second multicast identifier to scramble the first multicast information, and the terminal device may use the second multicast identifier to descramble the first multicast information.

402. The terminal device performs clock adjustment at a first clock adjustment time according to the first information.

In a specific implementation, the terminal device may also receive the SIB sent by the network device, and when determining UTC according to the UTC time information field in the SIB, synchronize the local clock according to the UTC time. Furthermore, the terminal device may also perform clock adjustment at the first clock adjustment time according to the first information.

Corresponding to the two implementation possibilities of the above-mentioned first information, the terminal can perform clock adjustment in the following two ways, which specifically include:

In the first type, the terminal device performs leap second adjustment of the type indicated by the leap second notice information at the first clock adjustment time according to the leap second notice information.

It should be noted that the time of leap second adjustment occurs regularly, for example, the leap second adjustment is performed at the last hour of the last day of June each year, and/or the leap second adjustment is performed at the last hour of the last day of December each year .

In a specific implementation, the terminal device may also determine the first clock adjustment time in the leap second adjustment time that occurs periodically. In a scenario where the network device uses the first information in a unicast manner, in order for the terminal device to determine that the clock adjustment is required before the clock adjustment time to achieve the effect of predicting the clock adjustment, the network device may send the first information before the clock adjustment time. Correspondingly, after the terminal device receives the first information from the network device, it can be considered that the first information indicates that the leap second adjustment is to be performed at the next upcoming leap second adjustment moment. For example, the first clock adjustment time is the first clock adjustment time (for example, leap second adjustment time) that appears after the terminal device receives the first information.

In some cases, due to poor channel quality, the terminal does not successfully receive the first information, and the network device retransmits the first information to the terminal device. This may cause the terminal device to successfully receive the first information at the moment (hereinafter referred to as time 1) receiving the first information. The message appears after the leap second adjustment time. At this time, the terminal device should not think that the first information indicates that the first clock adjustment time is coming after time 1 to adjust the clock, but should consider the received at time 1. The first information indicates that the clock is adjusted at the clock adjustment time before time 1. To achieve this effect, it may be specified that in a scenario where the network device sends the first information in a unicast manner, the leap second adjustment time indicated by the first information is the clock adjustment time closest to the time when the terminal receives the first information. For example, the first clock adjustment time is the clock adjustment time closest to the time when the terminal device receives the first information. The terminal device may ignore the first information, and may also perform clock adjustment according to the first information, which is not limited in the embodiment of the present application.

It can be understood that the clock adjustment time that is closest to the time when the terminal device receives the first information is the clock adjustment time with the shortest interval from the time when the terminal device receives the first information.

For example, referring to Figure 5, assume that the leap second adjustment is performed on the last hour of the last day of December each year. The leap second adjustment type indicated by the first message is positive leap second adjustment, that is, the clock jumps to the next minute after running for 58 seconds in the last minute of the last hour of the last day of December.

Referring to Figure 5, the clock adjustment time can be the time ending at 23:59:58 on December 31, 2017, the time ending at 23:59:58 on December 31, 2018, and the time ending at 23:59 on December 31, 2019. At the end of the minute and 58 seconds, etc. Assuming that the terminal device receives the first information from the network device on May 10, 2018, the terminal device can consider that the first clock adjustment time is the first clock adjustment time that appears after May 10, 2018, that is, in December 2018 The time ending at 23:59:58 on the 31st jumped to 0:00:00 on January 1, 2019. The terminal device can also consider the first clock adjustment time to be the closest clock adjustment time to May 10, 2018, that is, the time that ends at 23:59:58 on December 31, 2017. Because the terminal device currently receives the first clock adjustment time The information time is later than the first clock adjustment time determined by the terminal, and the terminal device can understand that the leap second indicated by the first information has occurred before, and the leap second adjustment may not be performed.

In the second type, the daylight saving time advance information of the terminal device performs daylight saving time adjustment of the type indicated by the daylight saving time advance information at the first clock adjustment time.

In the second implementation manner, the first clock adjustment time is the end time of the current time unit, that is, the end time of the time unit at which the terminal device receives the first information.

For example, the terminal device adjusts the local clock forward by N time lengths at the end time of the time unit at the time when the first information is received. Or, at the end time of the time unit at the time of receiving the first information, the local clock is adjusted backward by N time lengths.

Wherein, the N durations may be indicated by time information, or may be pre-configured durations, which are not limited in the embodiment of the present application.

In the method provided by the embodiment of the present application, the leap second and/or daylight saving time are announced through the first information, and the terminal device receives the first information, and can check the corresponding time domain position when the leap second and/or daylight saving time occurs. When the time is adjusted for leap second or summer time, the terminal can obtain the accurate time of the time domain position, thereby ensuring that the time of other reference points calculated is also accurate, and the local clock can be accurately maintained.

Optionally, the method shown in FIG. 4 further includes: receiving second information from the network device, where the second information is used to instruct the terminal device to receive the first information.

Optionally, the second information is also used to indicate the existence of the first information, or indicate a change in system information that carries the first information. Among them, the system information may be the SIB broadcast by the network device.

In a possible implementation manner, a new field can be added to the SIB to forecast leap second adjustment or daylight saving time adjustment, for example, adding a leap second forecast field and a daylight saving time forecast field. Wherein, the leap second forecast information implemented in this application may be a newly added leap second forecast field in the SIB, and the daylight saving time forecast information may be a newly added daylight saving time forecast field in the SIB.

Taking the LTE protocol (36.331) as an example, you can add a leap second notice field and a daylight saving time notice field in SystemInformationBlockType16 (SIB16) or DLInformationTransfer. Taking the 5G protocol (38.331) as an example, you can add leap second and daylight saving time related information in SIB9 or DLInformationTransfer.

In a possible addition scheme (denoted as scheme 1), the following fields are added to the timeForecastInfo cell of SIB16 (or the information element of SIB9):

The time information field is the time information described in the embodiment of the present application, and is used to indicate the length of the first time period.

It should be noted that the LeapForecastType field is used to perform a leap second adjustment forecast, that is, to indicate that a leap second is about to occur on the terminal. The type of leap second adjustment is determined by the value of this field (for example, "A" above). The value of the leapForecastType field may be 1 bit, indicating whether the terminal device performs positive leap second adjustment or negative leap second adjustment at the next leap second adjustment time after receiving the first information. For example, the value of the leapForecastType field is "0", indicating that the terminal device performs positive leap second adjustment at the next leap second adjustment time after receiving the first information, and the value of the leapForecastType field is "1", indicating that the terminal device receives the first information Negative leap second adjustment will be performed at the next leap second adjustment time; or, the value of the leapForecastType field is "0", indicating that the terminal device will perform negative leap second adjustment at the next leap second adjustment time after receiving the first information, and the value of the leapForecastType field "1", instructs the terminal device to perform positive leap second adjustment at the next leap second adjustment time after receiving the first information.

In another possible implementation manner, the value of the leapForecastType field is 1 bit, indicating whether the leap second adjustment time closest to the time when the terminal device receives the first information performs positive leap second adjustment or negative leap second adjustment. For example, the value of the leapForecastType field is "0", indicating that the leap second adjustment time closest to the time when the terminal device receives the first information performs positive leap second adjustment, and the value of the leapForecastType field is "1", indicating that the first information is received from the terminal device. Negative leap second adjustment is performed at the latest leap second adjustment time at the time of the message; or, the value of the leapForecastType field is "0", indicating that the leap second adjustment time closest to the time when the terminal device receives the first information performs negative leap second adjustment, the leapForecastType field The value of is "1", indicating that the leap second adjustment time closest to the time when the terminal device receives the first information is to perform positive leap second adjustment.

In another possible implementation manner, the value of the leapForecastType field is 2 bits. One bit is used to indicate whether the leap second adjustment time is June 30 or December 31 of the current year, and the other 1 bit is used to indicate whether the leap second adjustment time is a positive leap second or a negative leap second. For example, the first bit in the value of the leapForecastType field is "0", indicating that the leap second adjustment time is June 30 of the current year, and the first bit is "1", indicating that the leap second adjustment time is December of the current year No. 31; the second bit in the value of the leapForecastType field is "0" to indicate that positive leap second adjustment is performed, and the second bit is "1" to indicate that negative leap second adjustment is performed. Or, the first bit in the value of the leapForecastType field is "1", indicating that the leap second adjustment time is June 30 of the current year, and the first bit is "0", indicating that the leap second adjustment time is December 31 of the current year Number; the second bit in the value of the leapForecastType field is "1" to indicate that the positive leap second adjustment is performed, and the second bit is "0" to indicate that the negative leap second adjustment is performed.

In another possible implementation, other values can also be used to indicate the type of leap second adjustment. For example, the value of the leapForecastType field can be leap59 or leap61. Among them, leap59 represents the execution of negative leap second adjustment, for example, the first leap second adjustment time after the time when the first information is received, the negative leap second adjustment is performed; leap61 represents the execution of positive leap second adjustment, for example, after the time when the first information is received The positive leap second adjustment is performed at the moment of the first leap second adjustment.

The dstForecastType field is the daylight saving time forecast information, used to notify the start or end of daylight saving time. The value of the dstForecastType field can be B1 or B2. B1 indicates that the daylight saving time adjustment will be executed after the current time unit ends, and the specific adjustment duration is determined by the value N of the dayLightSavingTime field; in a possible implementation, B1 can be "dstStart".

B2 means that the daylight saving time adjustment will stop after the end of the current hour. The adjustment duration before the stop is determined by the value of the newly added dayLightSavingTime field or the value of the existing dayLightSavingTime field in the SIB. In one possible implementation, B2 could be "dstEnd".

The dayLightSavingTime field can be used in conjunction with dstForecastType to indicate that the daylight saving time adjustment is about to be carried out or the daylight saving time adjustment is about to end. In a possible implementation manner, the value of the dayLightSavingTime field is N bits, which can indicate a time length of 1 to ^2N .

In a possible implementation, the field in the dayLightSavingTime field may not exist or be left blank. Reuse the existing dayLightSavingTime field in the SIB to indicate the adjustment time. For example, "00" means no daylight saving time adjustment; "01" means +1 hour daylight saving time, that is, the time is adjusted forward by one hour after the current time unit ends ; "10" means adding +2 hours of daylight saving time, that is, adjust the time forward by two hours after the current time unit ends.

In a possible implementation manner, the first information may indicate the specific date of the leap second adjustment time and the leap second adjustment type. For example, the indicating leap second adjustment time is June 30, xx or December 31, xx, indicating the positive leap second adjustment type or the negative leap second adjustment type. Corresponding fields can be added to the timeForecastInfo cell to indicate the above information. A possible addition scheme (denoted as scheme 2) is as follows:

Among them, leapForcastYear is used to indicate the specific year of the leap second adjustment, leapForcastDate is used to indicate the specific date of the leap second adjustment, leapForecastType is used to indicate whether the type of leap second adjustment is positive leap second adjustment or negative leap second adjustment, and dstForecastType is used to indicate The daylight saving time adjustment is performed after the current time unit (the time unit at which the first information is received) ends, and dayLightSavingTime is used to indicate the duration of daylight saving time adjustment.

It should be noted that the leap second notice or daylight saving time notice can be added to the existing SIB (such as the above-mentioned SIB16 or SIB9), or the leap second notice or daylight saving time can be added to the new SIB or dedicated RRC message. Pre-announcement information, to announce clock adjustment to terminal equipment.

In solution 2, the explanation of other fields refers to the description in solution 1, which will not be repeated here. For example, the descriptions of the daylight saving time forecast field, the leap second forecast field, and the time information field can refer to the related description of Scheme 1.

In a possible implementation manner, the clock can be adjusted according to the process shown in FIG. 6. Specifically:

601. The terminal device accesses the network provided by the network device.

602. The network device broadcasts a first system message; the first system message includes time information.

Among them, the time information is used to indicate time, for example, UTC time or GPS time.

603. The terminal device receives the first system message from the network device, and adjusts the local clock according to the first system message.

The terminal can determine the time of a time domain reference point (for example, a frame boundary) according to the first system message, and can also calculate the time of other time domain locations in the entire time domain based on the time of the time domain reference point to complete local clock synchronization.

604. The network device determines the next clock adjustment time.

Specifically, the network device may determine the next clock adjustment example according to the locally maintained clock, for example, the time of the next leap second adjustment or the time of the next daylight saving time adjustment.

For example, the current time of the base station is 08:12:23 on May 23, 2019, and the next clock adjustment time can be at 23:59:58 on June 30, 2019, and at 23:59 on June 30, 2019. After the end of the minute and 58 seconds, the leap second is adjusted, and it will directly jump to 00:00:00 on June 31, 2019.

605. The network device sends a system message change instruction to the terminal device.

The system message change indication is used to indicate that the system message of the terminal device is changed. After receiving the system message change indication from the network device, the terminal actively receives the changed system message broadcast by the network device.

In a possible implementation, the network device may send a system message change instruction to the terminal device before the next clock adjustment time.

606. The network device broadcasts the second system message. The second system message includes the first information, and the first information is used to indicate the clock adjustment type.

Among them, the second system message 2 is a changed system message, and the implementation of the first information is related to the related description of the embodiment shown in FIG. 4, which is not repeated here. The first information may predict the type of clock adjustment, for example, leap second adjustment or summer time adjustment.

607. The terminal device receives the second system message from the network device, performs clock adjustment according to the first information at the first clock adjustment time, and maintains the local clock according to the adjusted clock.

It should be noted that after the terminal device receives the second system message from the network device, it can determine that the next clock adjustment time (which may be the "next clock adjustment time" determined by the network device in step 604) is the clock adjustment announced by the first information Time, the clock is adjusted according to the first information at the next clock adjustment time.

It is understandable that the first clock adjustment time may be the first clock adjustment time after the time when the terminal device receives the second system message, that is, the next clock adjustment time.

It should be noted that the clock adjustment time appears periodically, and the first clock adjustment time may be the first clock adjustment time that appears after receiving the system message 2. After receiving the system message 2, the terminal determines the time of a reference point (denoted as reference point 1) according to the time information therein (for example, timeInfo-r11), and can also determine the reference point corresponding to the first clock adjustment time (denoted as reference point). Point 2). When calculating the time of other reference points based on the time of reference point 1, the clock needs to be adjusted at reference point 2.

For example, referring to Figure 7, suppose that the terminal indicates the UTC time of the frame boundary of frame 10 according to system message 2 as: May 26, 2019, 23:59:23, 810 milliseconds, and receiving the first information in system message 2. The forecasted clock adjustment type is positive leap second adjustment. The terminal determines that the next leap second adjustment time is June 30, 2019, 23:59:58, and the corresponding reference point is frame X. When the leap second adjustment is not performed, the UTC time corresponding to the frame boundary of frame X is: 2019 At 23:59:58 on June 30, 2010, due to the leap second adjustment at the frame boundary of frame X, the correct UTC time for the frame boundary of frame X should be: June 31, 2019, 0:0:0 .

In the case of dividing each functional module corresponding to each function, FIG. 8 shows a possible schematic structural diagram of the communication device involved in the foregoing embodiment. The communication device shown in FIG. 8 may be the terminal device described in the embodiment of the present application, or may be a component in the terminal device that implements the foregoing method. As shown in FIG. 8, the communication device includes a processing unit 801 and a communication unit 802. The processing unit may be one or more processors, and the communication unit may be a transceiver.

The processing unit 801 is configured to support the terminal to perform step 402, step 604, and/or other processes used in the technology described herein.

The communication unit 802 is used for the terminal to execute step 401, step 602, step 605, and step 606, and/or other processes used in the technology described herein.

It should be noted that all relevant content of the steps involved in the foregoing method embodiments can be cited in the functional description of the corresponding functional module, and will not be repeated here.

In a possible implementation manner, the communication device shown in FIG. 8 may also be a chip applied to a terminal device. The chip may be a System-On-a-Chip (SOC) or a baseband chip with communication function.

Wherein, the above communication unit 802 for receiving/sending may be an interface circuit of the device for receiving signals from other devices. For example, when the device is implemented as a chip, the communication unit is an interface circuit used by the chip to receive signals from other chips or devices, or the sending unit is an interface used by the chip to send signals to other chips or devices. Circuit.

Exemplarily, in the case of using an integrated unit, a schematic structural diagram of a communication device provided in an embodiment of the present application is shown in FIG. 9. In FIG. 9, the communication device includes: a processing module 901 and a communication module 902. The processing module 901 is used to control and manage the actions of the communication device, for example, to execute the steps executed by the above-mentioned processing unit 801, and/or to execute other processes of the technology described herein. The communication module 902 is configured to execute the steps performed by the above-mentioned communication unit 802, and supports interaction between the communication device and other devices, such as interaction with other terminal devices. As shown in FIG. 9, the communication device may further include a storage module 903, and the storage module 903 is used to store the program code and data of the communication device.

When the processing module 901 is a processor, the communication module 902 is a transceiver, and the storage module 903 is a memory, the communication device is the communication device shown in FIG. 3A.

In the case of dividing each functional module corresponding to each function, FIG. 10 shows a possible structural schematic diagram of the communication device involved in the foregoing embodiment. The communication device shown in FIG. 10 may be the network device described in the embodiment of the present application, or may be a component of the network device that implements the foregoing method. As shown in FIG. 10, the communication device includes a processing unit 1001 and a communication unit 1002. The processing unit may be one or more processors, and the communication unit may be a transceiver.

The processing unit 1001 is configured to support the network device to perform step 603, step 607, and/or other processes used in the technology described herein.

The communication unit 1002 is used to support communication between the communication device and other communication devices, for example, to support network equipment to perform step 401, step 602, step 605, and step 606, and/or other processes used in the technology described herein .

In a possible implementation manner, the communication device shown in FIG. 10 may also be a chip applied to a network device. The chip may be a System-On-a-Chip (SOC) or a baseband chip with communication function.

Exemplarily, in the case of using an integrated unit, a schematic structural diagram of a communication device provided in an embodiment of the present application is shown in FIG. 11. In FIG. 11, the communication device includes: a processing module 1101 and a communication module 1102. The processing module 1101 is used to control and manage the actions of the communication device, for example, to perform the steps performed by the above-mentioned processing unit 1001, and/or to perform other processes of the technology described herein. The communication module 1102 is configured to perform the steps performed by the above-mentioned communication unit 1002, and supports interaction between the communication device and other devices, such as interaction with other terminal devices. As shown in FIG. 11, the communication device may further include a storage module 1103, and the storage module 1103 is used to store the program code and data of the communication device.

When the processing module 1101 is a processor, the communication module 1102 is a transceiver, and the storage module 1103 is a memory, the communication device is the communication device shown in FIG. 3B.

The embodiment of the present application provides a computer-readable storage medium, and the computer-readable storage medium stores instructions; the instructions are used to execute the method shown in FIG. 4 or FIG. 6.

The embodiment of the present application provides a computer program product including instructions, which when running on a communication device, causes the communication device to execute the method shown in FIG. 6 or FIG. 6.

A wireless communication device in an embodiment of the application includes: instructions stored in the wireless communication device; when the wireless communication device runs on the communication device shown in FIGS. 3A, 3B, and 8 to 11, the communication device is caused to execute The method shown in Figure 4 or Figure 6. The wireless communication device may be a chip.

Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated as needed. It is completed by different functional modules, that is, the internal structure of the database access device is divided into different functional modules to complete all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed database access device and method can be implemented in other ways. For example, the embodiments of the database access device described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or The components can be combined or integrated into another device, or some features can be omitted or not implemented. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections may be indirect couplings or communication connections through some interfaces, database access devices or units, and may be in electrical, mechanical or other forms.

The units described as separate parts may or may not be physically separate. The parts displayed as units may be one physical unit or multiple physical units, that is, they may be located in one place, or they may be distributed to multiple different places. . Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present application are essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of software products, which are stored in a storage medium It includes several instructions to make a device (which may be a single-chip microcomputer, a chip, etc.) or a processor execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any change or replacement within the technical scope disclosed in this application shall be covered by the protection scope of this application . Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A clock adjustment method, characterized in that it comprises:

The terminal device receives first information from the network device, where the first information is used to indicate the clock adjustment type to the terminal device;

The terminal device performs clock adjustment at the first clock adjustment time according to the first information.
The method according to claim 1, wherein the first information includes leap second notice information, and the leap second notice information is used to indicate a leap second adjustment type.
The method according to claim 2, wherein the terminal device performs clock adjustment at the first clock adjustment time according to the first information, comprising:

According to the leap second notice information, perform leap second adjustment of the type indicated by the leap second notice information at the first clock adjustment time.
The method according to claim 1, wherein the first information includes daylight saving time advance information, and the daylight saving time advance information is used to indicate the type of daylight saving time adjustment.
The method according to claim 4, wherein the terminal device performs clock adjustment at the first clock adjustment time according to the first information, comprising:

The terminal device performs daylight saving time adjustment of the type indicated by the daylight saving time advance information at the first clock adjustment time according to the daylight saving time advance information.
The method according to claim 5, wherein the daylight saving time notice information includes type information and time information; the time information is used to indicate the first time length, and the type information is used to indicate the time relative to the current time unit. Adjust the first duration forward or adjust the first duration backward at the end time;

Wherein, the current time unit is a time unit at which the terminal device receives the first information, and the first clock adjustment time is an end time of the current time unit.
The method according to claim 5, wherein the daylight saving time notice information includes type information, and the type information is used to indicate that the first time length is adjusted forward relative to the end time of the current time unit, or relative to the current time. The end time of the unit is adjusted forward by the second time period, or the first time period is adjusted backward relative to the end time of the current time unit, or the second time period is adjusted backward relative to the end time of the current time unit, or the clock is not adjusted;

Wherein, the current time unit is a time unit at which the terminal device receives the first information, and the first clock adjustment time is an end time of the current time unit.
The method according to any one of claims 1-3, wherein the method further comprises:

The terminal device determines the first clock adjustment time; the first clock adjustment time is the first clock adjustment time that appears after the terminal device receives the first information; or, the first clock adjustment The time is the clock adjustment time closest to the time when the terminal device receives the first information.
The method according to any one of claims 1-8, wherein the method further comprises:

Receiving second information from the network device, where the second information is used to instruct the terminal device to receive the first information.
A clock adjustment method, characterized in that it comprises:

Determining first information, where the first information is used to indicate a clock adjustment type to the terminal device;

Sending the first information to the terminal device.
The method according to claim 10, wherein the first information includes leap second notice information, and the leap second notice information is used to indicate a leap second adjustment type.
The method according to claim 10, wherein the first information includes daylight saving time advance information, and the daylight saving time advance information is used to indicate a type of daylight saving time adjustment.
The method according to claim 12, wherein the daylight saving time notice information includes type information and time information; the time information is used to indicate the first time length, and the type information is used to indicate the time relative to the current time unit. Adjusting the first duration forward or adjusting the first duration backward at the end time;

Wherein, the current time unit is the time unit where the time when the terminal device receives the first information, and the first clock adjustment time is the end time of the current time unit.
The method according to claim 12, wherein the daylight saving time notice information includes type information, and the type information is used to indicate that the first time length is adjusted forward relative to the end time of the current time unit, or relative to the current time. The end time of the unit is adjusted forward by the second time period, or the first time period is adjusted backward relative to the end time of the current time unit, or the second time period is adjusted backward relative to the end time of the current time unit, or the clock is not adjusted;

Wherein, the current time unit is the time unit where the time when the terminal device receives the first information, and the first clock adjustment time is the end time of the current time unit.
The method according to any one of claims 10-14, wherein the method further comprises:

Sending second information to the terminal device, where the second information is used to instruct the terminal device to receive the first information.
A communication device, characterized by comprising:

The communication unit is configured to receive first information from a network device, where the first information is used to indicate a clock adjustment type to the terminal device;

The processing unit is configured to perform clock adjustment at the first clock adjustment time according to the first information.
The communication device according to claim 16, wherein the first information comprises leap second notice information, and the leap second notice information is used to indicate a leap second adjustment type.
The communication device according to claim 17, wherein the processing unit is specifically configured to execute a leap second of the type indicated by the leap second notice at the first clock adjustment time according to the leap second notice information Second adjustment.
The communication device according to claim 16, wherein the first information includes daylight saving time advance information, and the daylight saving time advance information is used to indicate the type of daylight saving time adjustment.
The communication device according to claim 19, wherein the processing unit is specifically configured to, according to the daylight saving time advance information, execute the type of daylight saving time indicated by the daylight saving time advance information at the first clock adjustment time Time adjustment.
The communication device according to claim 20, wherein the daylight saving time notice information includes type information and time information; the time information is used to indicate a first duration, and the type information is used to indicate a unit relative to the current time. Adjust the first duration forward or adjust the first duration backward;

Wherein, the current time unit is a time unit at which the terminal device receives the first information, and the first clock adjustment time is an end time of the current time unit.
The communication device according to claim 20, wherein the daylight saving time notice information includes type information, and the type information is used to indicate that the first time length is adjusted forward relative to the end time of the current time unit, or relative to the current time. The end time of the time unit is adjusted forward by the second time period, or the first time period is adjusted backward relative to the end time of the current time unit, or the second time period is adjusted backward relative to the end time of the current time unit, or the clock is not adjusted;

Wherein, the current time unit is a time unit at which the terminal device receives the first information, and the first clock adjustment time is an end time of the current time unit.
The communication device according to any one of claims 16-18, wherein the processing unit is further configured to determine the first clock adjustment time; the first clock adjustment time is received by the terminal device The clock adjustment time that appears first after the first information; or, the first clock adjustment time is the clock adjustment time closest to the time when the terminal device receives the first information.
The communication device according to any one of claims 16-23, wherein the communication unit is further configured to receive second information from the network device, and the second information is used to instruct the terminal device to receive The first information.
A communication device, characterized by comprising a processor, which is coupled with a memory;

Memory, used to store computer programs;

The processor is configured to execute the computer program stored in the memory, so that the device executes the method according to any one of claims 1 to 15.
A readable storage medium, characterized by comprising a program or instruction, and when the program or instruction is executed by a processor, the method according to any one of claims 1 to 15 is executed.