WO2021155806A1 - 参考时间信息的获取方法、信息收发方法及相关设备 - Google Patents

参考时间信息的获取方法、信息收发方法及相关设备 Download PDF

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Publication number
WO2021155806A1
WO2021155806A1 PCT/CN2021/075066 CN2021075066W WO2021155806A1 WO 2021155806 A1 WO2021155806 A1 WO 2021155806A1 CN 2021075066 W CN2021075066 W CN 2021075066W WO 2021155806 A1 WO2021155806 A1 WO 2021155806A1
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Prior art keywords
reference time
downlink reference
terminal
information
time information
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PCT/CN2021/075066
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English (en)
French (fr)
Inventor
吴昱民
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维沃移动通信有限公司
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Publication of WO2021155806A1 publication Critical patent/WO2021155806A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H04W56/0015—Synchronization between nodes one node acting as a reference for the others
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • the present invention relates to the field of wireless communication technology, and in particular to a method for obtaining reference time information, a method for receiving and sending information, and related equipment.
  • the network side can send reference time information to a terminal (User Equipment, UE), and the terminal performs time synchronization according to the received reference time information, so as to ensure that the terminal and the network side have the same time understanding.
  • UE User Equipment
  • the terminal and the network side device are set with independent clocks, and the clock oscillators of different clocks may be different, after the terminal performs time synchronization according to the reference information sent by the network side, it may cause the time of the terminal to be relative to the network side. The time is off.
  • the embodiments of the present invention provide a method, a terminal, and a network side device for obtaining reference time information, so as to solve the technical problems existing in the prior art.
  • the present invention is implemented as follows:
  • an embodiment of the present invention provides a method for obtaining reference time information, which is applied to a terminal, and includes:
  • the second downlink reference time is: a downlink reference time pre-configured, agreed upon by a protocol, or configured by the network side and located after the first reference time; the first reference time includes: the second downlink reference time The downlink reference time corresponding to the reference time information received or calculated before the time.
  • an embodiment of the present invention also provides a method for obtaining reference time information, which is applied to a terminal, and includes:
  • the reference time information corresponding to the second downlink reference time is calculated.
  • an embodiment of the present invention also provides an information transceiving method, which is applied to a network side device, and includes:
  • target reference time information is sent to the terminal.
  • an embodiment of the present invention also provides a terminal, including:
  • a reference time information calculation module configured to calculate reference time information corresponding to the second downlink reference time based on the first downlink reference time and the second downlink reference time;
  • the second downlink reference time is: a downlink reference time pre-configured, agreed upon by a protocol, or configured by the network side and located after the first reference time; the first reference time includes: the second downlink reference time The downlink reference time corresponding to the reference time information received or calculated before the time.
  • an embodiment of the present invention also provides a terminal, including:
  • the sending module is used to send demand information to the network side device
  • a receiving module configured to receive target reference time information sent by the network side device based on the demand information
  • the reference time information calculation module is configured to calculate reference time information corresponding to the second downlink reference time based on the target reference time information.
  • an embodiment of the present invention also provides a network-side device, which is characterized in that it includes:
  • the receiving module is used to receive the demand information sent by the terminal;
  • the sending module is configured to send target reference time information to the terminal in response to the demand information.
  • an embodiment of the present invention provides a terminal including: a memory, a processor, and a computer program stored on the memory and capable of running on the processor.
  • the computer program is executed by the processor, The steps in the method for obtaining reference time information provided by the first aspect or the second aspect of the embodiments of the present invention are implemented.
  • an embodiment of the present invention provides a network side device, including: a memory, a processor, and a computer program stored on the memory and running on the processor, and the computer program is executed by the processor. When executed, the steps in the information transceiving method provided in the third aspect of the embodiments of the present invention are implemented.
  • an embodiment of the present invention provides a computer-readable storage medium having a computer program stored on the computer-readable storage medium, and the computer program implements the first aspect or the second aspect of the embodiment of the present invention when the computer program is executed by a processor.
  • the reference time information corresponding to the second downlink reference time is calculated based on the first downlink reference time and the second downlink reference time; wherein, the second downlink reference time is: pre-configuration, protocol The downlink reference time agreed or configured by the network side and located after the first reference time; the first reference time includes: corresponding to the reference time information received or calculated before the second downlink reference time Downlink reference time.
  • the terminal may also calculate the reference time information corresponding to the second downlink reference time based on the first downlink reference time and the second downlink reference time , So that the terminal can perform time synchronization based on the calculated reference time information to ensure that the time understanding of the terminal and the network side is consistent, thereby reducing the possibility of deviation of the time of the terminal from the time of the network side.
  • Figure 1 is a structural diagram of a network system provided by an embodiment of the present invention.
  • FIG. 2 is one of the flowcharts of the method for obtaining reference time information provided by an embodiment of the present invention
  • FIG. 3 is a schematic diagram of SFN distribution provided by an embodiment of the present invention.
  • FIG. 5 is a flowchart of a method for sending and receiving information according to an embodiment of the present invention.
  • Figure 6 is one of the schematic structural diagrams of a terminal provided by an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a reference time information calculation module in FIG. 6 provided by an embodiment of the present invention.
  • FIG. 8 is a second structural diagram of a terminal provided by an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a network side device provided by an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of the hardware structure of a terminal provided by an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of the hardware structure of a network side device provided by an embodiment of the present invention.
  • words such as “exemplary” or “for example” are used to represent examples, illustrations, or illustrations. Any embodiment or design solution described as “exemplary” or “for example” in the embodiments of the present invention should not be construed as being more preferable or advantageous than other embodiments or design solutions. To be precise, words such as “exemplary” or “for example” are used to present related concepts in a specific manner.
  • the wireless communication system may be a 5G system, or an evolved Long Term Evolution (eLTE) system, or a subsequent evolved communication system.
  • eLTE evolved Long Term Evolution
  • Figure 1 is a structural diagram of a network system provided by an embodiment of the present invention. As shown in Figure 1, it includes a terminal 11 and a network side device 12.
  • the terminal 11 may be a mobile communication device, such as a mobile phone or a tablet computer. (Tablet Personal Computer), Laptop Computer, Personal Digital Assistant (PDA), Mobile Internet Device (MID) or Wearable Device (Wearable Device), etc., which need to be explained Yes, the specific type of the terminal 11 is not limited in the embodiment of the present invention.
  • the above-mentioned network side device 12 may be a 5G network side device (for example: gNB, 5G NR NB), or may be a 4G network side device (for example: eNB), or may be a 3G network side device (for example: NB), or subsequent evolution
  • 5G network side device for example: gNB, 5G NR NB
  • 4G network side device for example: eNB
  • 3G network side device for example: NB
  • the network side equipment in the communication system, etc. it should be noted that the specific type of the network side equipment 12 is not limited in the embodiment of the present invention.
  • Fig. 2 is a flowchart of a method for obtaining reference time information applied to the network system shown in Fig. 1 according to an embodiment of the present invention. As shown in Figure 2, the method includes the following steps:
  • Step 201 Calculate reference time information corresponding to the second downlink reference time based on the first downlink reference time and the second downlink reference time;
  • the second downlink reference time is: a downlink reference time pre-configured, agreed upon by a protocol, or configured by the network side and located after the first reference time; the first reference time includes: the second downlink reference time The downlink reference time corresponding to the reference time information received or calculated before the time.
  • the terminal can calculate the reference time information corresponding to the second downlink reference time according to the second downlink reference time and the first downlink reference time before the second downlink reference time, so that it can calculate the reference time information corresponding to the second downlink reference time according to any previous time
  • the received or calculated reference time information acquires new reference time information, so that the terminal can perform time synchronization based on the newly acquired reference time information, so as to ensure that the terminal and the network side have the same time understanding, thereby reducing the terminal’s time relative to The possibility of time deviation on the network side.
  • the terminal may perform the first time synchronization according to the reference time information sent by the network-side device in the current serving cell. After the first time synchronization, the terminal may perform the first time synchronization according to the downlink reference time corresponding to the reference time information (ie, the first downlink reference time).
  • the next downlink reference time ie, the second downlink reference time after the reference time
  • the reference time or the calculated reference time information corresponding to any one of the second to N-1 downlink reference times are calculated to obtain new reference time information used for the Nth time synchronization, and N is an integer greater than or equal to 2.
  • the downlink reference time of any one of the foregoing 2nd to N-1 may be the reference time information corresponding to the sent reference time information sent by the network side, which is not limited here.
  • the terminal performs time synchronization according to the reference time information sent by the network side device. It can be that the network side device sends a system message (such as SIB16) indicating the reference time information to the terminal, and the protocol stipulates that the terminal receives the reference time information.
  • the time position of is: the boundary of the system frame number (System Frame Number, SFN) where the end boundary of the system message sending window of the system message of the reference time information is located.
  • the time position of the terminal receiving the SIB16 (i.e. system message) used to indicate the reference time information is (SFN_2, Subframe_1), and the system message sending window of the SIB16 is 10 subframes (Subframe) (i.e. in 1 SFN) There are 10 subframes)
  • the end boundary of the system message window of the SIB16 used by the terminal to indicate the reference time information is (SFN_3, Subframe_1), that is, the reference time information corresponds to the end boundary time of SFN_3.
  • the network side device may send the reference time information to the terminal through a unicast message (such as a radio resource control configuration (ie RRC Reconfiguration) message, etc.), and the unicast message carries a reference SFN value, and the protocol stipulates that the terminal receives it.
  • the time position corresponding to the received reference time information is: the SFN closest to receiving the reference time information is the system frame end boundary of the reference SFN value.
  • the above reference time information refers to absolute time information, for example, 8:58:25 on February 7, 2020, etc.; the above first downlink reference time and the above second downlink reference time correspond to different absolute time information.
  • Any downlink reference time of time information, and the downlink reference time may include at least one of SFN, subframe, and time slot, that is, both the first downlink reference time and the second downlink reference time include SFN, subframe And at least one of the slot.
  • the foregoing calculation of the reference time information corresponding to the second downlink reference time based on the first downlink reference time and the second downlink reference time can be understood as the terminal according to the first downlink reference time and the second downlink reference time.
  • Time determine the time position corresponding to the boundary of the second downlink reference time, and update the reference time information corresponding to the second downlink reference time to the determined time position.
  • the clock of the terminal can be adjusted according to the reference time information corresponding to the second downlink reference time to achieve time synchronization.
  • calculating the reference time information corresponding to the second downlink reference time based on the first downlink reference time and the second downlink reference time may include: calculating the first downlink reference time and the The difference between the second downlink reference time; based on the difference, the reference time information corresponding to the second downlink reference time is calculated, that is, the terminal can be based on the difference between the first downlink reference time and the second downlink reference time The difference determines the time position corresponding to the boundary of the second downlink reference time, and updates the reference time information corresponding to the second downlink reference time, so that the calculation complexity of the reference time information is reduced.
  • the calculation of the reference time information corresponding to the second downlink reference time based on the difference between the first downlink reference time and the second downlink reference time may be through protocol agreement, pre-configuration, or network side
  • the configured calculation formula uses the difference as the input amount of the calculation formula, and the time position corresponding to the boundary of the second downlink reference time is calculated.
  • first downlink reference time and the second downlink reference time both include at least one of SFN, subframe, and time slot, examples of various situations are described here, and the details are as follows:
  • Example 1 In the case where the first downlink reference time and the second downlink reference time described above only include SFN, that is, as shown in FIG. 3, the reference time information referenceTime(1) received by the terminal for the first time in the current serving cell corresponds to At the boundary of SFN(1), if the above-mentioned first downlink reference time is SFN(m), the reference time information corresponding to SFN(m) can be received (such as SFN(1)) or calculated, then the terminal can According to the following calculation formula (1), the time position corresponding to the SFN(X) boundary in the second downlink reference time is calculated, m and X are both positive integers, and X is greater than m, where:
  • referenceTime(m) corresponds to the boundary of SFN(m);
  • latestReferenceTime represents the time position corresponding to the SFN(X) boundary
  • sfnGranularity represents the time granularity corresponding to SFN (for example, sfnGranularity is 10ms, etc.).
  • Example 2 In the case where the above-mentioned first downlink reference time and the second downlink reference time include SFN and subframe (ie subframe), that is, the reference time information referenceTime(1) received by the terminal for the first time in the current serving cell corresponds to As shown in Figure 3 on the boundary of subframe(1) in SFN(1), if the first downlink reference time is subframe(k) in SFN(m), the terminal can be calculated according to the following calculation formula (2) The time position corresponding to the boundary of subframe(y) in SFN(X) in the second downlink reference time, k and y are both positive integers, where:
  • referenceTime(m) corresponds to the boundary of subframe(k) in SFN(m);
  • latestReferenceTime represents the time position corresponding to the boundary of subframe(y) in SFN(X);
  • subframeGranularity represents the time granularity corresponding to the subframe (such as 1ms, etc.).
  • Example 3 In the case where the first downlink reference time and the second downlink reference time include SFN and slot (ie, time slot), that is, the reference time information referenceTime(1) received by the terminal for the first time in the current serving cell corresponds to The boundary of slot(1) in SFN(1) shown in Fig. 3, if the first downlink reference time mentioned above is slot(i) in SFN(m), the terminal can calculate according to the following calculation formula (3) to obtain the first 2.
  • the time position corresponding to the boundary of slot(z) in SFN(X) in the downlink reference time, i and z are both positive integers, where:
  • referenceTime(m) corresponds to the boundary of subframe(i) in SFN(m);
  • latestReferenceTime represents the time position corresponding to the boundary of slot(z) in SFN(X);
  • slotGranularity represents the time granularity corresponding to the slot (such as 0.5ms, etc.).
  • the SFN of the second downlink reference time may have at least one SFN number inversion relative to the SFN of the first downlink reference time.
  • the calculation is based on the difference.
  • the reference time information corresponding to the second downlink reference time includes: calculating the reference time information corresponding to the second downlink reference time based on the difference and the number of SFN flips of the system frame number; wherein, the number of SFN flips is the number of SFN flips.
  • the terminal can calculate the first reference time according to the following formula (4) 2.
  • the time position corresponding to the SFN(X) boundary in the downlink reference time where:
  • referenceTime(m) corresponds to the boundary of SFN(m);
  • maxSFN identifies the range of SFN numbers
  • numOfWrap identifies the number of times that SFN(x) flips relative to SFN(1).
  • the first downlink reference time is the downlink reference time corresponding to the reference time information received by the terminal for the first time in the current serving cell as an example, and the first downlink reference time is actually It may be any downlink reference time before the aforementioned second downlink reference time.
  • the foregoing first downlink reference time may be any of the following:
  • the downlink reference time corresponding to the reference time information received or calculated by the terminal for the first time
  • the downlink reference time agreed by the protocol or configured by the network.
  • the reference time information received by the terminal for the first time can be understood as: when the terminal accesses the target cell for the first time (for example, the terminal in the connected state switches to the target cell, or the terminal in the idle state reselects to the target cell).
  • the reference time information received by the cell; or, when the terminal needs time synchronization, the reference time information received from the target cell (for example, the reference time information obtained by reading the system information; or after sending the reference time request information, the network The reference time information sent by the side device to the terminal through dedicated signaling).
  • the foregoing second downlink reference time may be any downlink reference time after the terminal performs the first time synchronization.
  • the second downlink reference time includes the downlink reference time when calculating the difference, or the distance calculation
  • the downlink reference time at the difference is the closest downlink reference time, so that the terminal can synchronize time more in time.
  • each SFN includes 10 subframes with a duration of 10ms. If the terminal calculates the above difference at the time position of the boundary of the fourth subframe of SFN(j) (that is, 4ms), and j is a positive integer greater than 1, then the above
  • the second downlink reference time may be SFN(j-1) or SFN(j); if the terminal calculates the above difference at the time position (ie 7ms) of the boundary of the seventh subframe of SFN(j), then the second downlink The reference time can be SFN(j+1) or SFN(j).
  • the calculation of the reference time information corresponding to the second downlink reference time by the above terminal based on the first downlink reference time and the second downlink reference time may be performed in any scenario, which is not limited herein.
  • the foregoing calculation of reference time information corresponding to the second downlink reference time based on the first downlink reference time and the second downlink reference time includes:
  • the reference time information corresponding to the second downlink reference time is calculated based on the first downlink reference time and the second downlink reference time, where the trigger condition includes:
  • the internal clock deviation of the terminal is greater than or equal to the clock accuracy, for example, the internal clock deviation of the terminal is 1 us after 10 seconds after the terminal receives the reference time information, and the clock accuracy is 1 us; or,
  • the reference time accuracy requirement of the terminal is changed, for example, when the terminal receives the reference time information, the time accuracy requirement of the terminal is 10us, and the current time accuracy requirement of the terminal is changed to 1us; or,
  • the network side device After receiving the synchronization indication information sent by the network side, for example, the network side device sends 1 bit to indicate that the UE needs to perform time synchronization again. Specifically, the network side device indicates the SFN number, and the terminal uses the SFN number as the second downlink reference time, and calculates Reference time information corresponding to the second downlink reference time.
  • the terminal calculates the reference time information corresponding to the second downlink reference time based on the first downlink reference time and the second downlink reference time only when the above trigger condition is satisfied, so as to avoid the terminal calculating the reference time information too frequently, Realize the reduction of terminal energy consumption.
  • the cell corresponding to the first reference time information is the same as the cell corresponding to the second reference time information, which can further ensure the accuracy of the calculated reference time information.
  • the reference time information received by the terminal corresponds to cell 1
  • the current serving cell of the terminal still includes cell 1, that is, the second reference time information
  • the corresponding cell is cell 1
  • the terminal may calculate the reference time information corresponding to the second downlink reference time based on the first downlink reference time and the second downlink reference time.
  • the terminal if the terminal’s current serving cell (or the UE’s current primary cell PCell or primary and secondary cell PSCell) is changed to cell 2, that is, the cell corresponding to the second reference time information is cell 2, the terminal needs to be required when a clock deviation occurs Re-report the time information request information.
  • Fig. 4 is another method for obtaining reference time information applied to the network system shown in Fig. 1 according to an embodiment of the present invention. As shown in Figure 4, the method includes the following steps:
  • Step 401 Send demand information to the network side device
  • Step 402 Receive target reference time information sent by the network side device based on the demand information.
  • the terminal when the terminal needs to perform time synchronization again by receiving the reference time information sent by the network side device, the terminal can send demand information to the network side device.
  • the network side device When the network side device receives the demand information, the network side device responds to the demand information Feedback the target reference time information to the terminal, so that the terminal instructs the network side device to send the reference time information in a timely manner according to its own needs, so that the terminal can synchronize time based on the newly received target reference time information to ensure that the terminal and the network side have the same time understanding , Thereby reducing the possibility of deviation between the terminal time and the time on the network side.
  • the above-mentioned demand information may be any information used to instruct the network-side device to send the above-mentioned target reference time information.
  • the above-mentioned demand information is information used to request the network-side device to send the reference time information once, and so on.
  • the above-mentioned requirement information may include at least one of the following:
  • the network-side device may periodically send reference time information to the terminal according to the time information update period, so that the terminal can periodically receive the reference time information.
  • the reference time information sent by the network side device, and time synchronization can be performed.
  • the above-mentioned time information update period may be 10s, that is, after receiving the above-mentioned demand information, the network side device sends the reference time information to the network side device once every 10s, and the terminal can perform time synchronization according to the reference time information received each time.
  • the network side device can flexibly send reference time information to the terminal according to the time accuracy information of the terminal. For example, when the clock accuracy information of the terminal is 1 us If the network-side device determines that the content clock of the terminal will generate a maximum error of 1 us every 10s, the network-side device can send reference time information to the terminal at intervals of 10s or less than 10s.
  • FIG. 5 is a flowchart of an information receiving and sending method applied to the network system shown in FIG. 1 according to an embodiment of the present invention. As shown in Figure 5, the method for sending and receiving information is applied to a network side device, and the method includes the following steps:
  • Step 501 Receive demand information sent by the terminal.
  • Step 502 In response to the demand information, send target reference time information to the terminal.
  • the requirement information includes at least one of the following:
  • FIG. 6 is a structural diagram of a terminal provided by an embodiment of the present invention. As shown in FIG. 6, the terminal 600 includes:
  • the reference time information calculation module 601 is configured to calculate reference time information corresponding to the second downlink reference time based on the first downlink reference time and the second downlink reference time;
  • the second downlink reference time is: a downlink reference time pre-configured, agreed upon by a protocol, or configured by the network side and located after the first reference time; the first reference time includes: the second downlink reference time The downlink reference time corresponding to the reference time information received or calculated before the time.
  • the reference time information calculation module 601 includes:
  • a calculation unit 6011 configured to calculate the difference between the first downlink reference time and the second downlink reference time
  • the reference time information calculation unit 6012 is configured to calculate reference time information corresponding to the second downlink reference time based on the difference.
  • the second downlink reference time includes the downlink reference time when the difference is calculated, or the downlink reference time that is closest to the downlink reference time when the difference is calculated.
  • the reference time information calculation unit 6012 is specifically configured to:
  • the number of times of the SFN flip is the number of times the SFN of the second downlink reference time is flipped compared to the SFN of the first downlink reference time.
  • the first downlink reference time is any one of the following:
  • the downlink reference time corresponding to the reference time information received or calculated by the terminal for the first time
  • the downlink reference time agreed by the protocol or configured by the network.
  • both the first downlink reference time and the second downlink reference time include at least one of SFN, subframe, and time slot.
  • the reference time information calculation module 601 is specifically configured to:
  • the reference time information corresponding to the second downlink reference time is calculated based on the first downlink reference time and the second downlink reference time, where the trigger condition includes:
  • the internal clock deviation of the terminal is greater than or equal to the clock accuracy; or,
  • the reference time accuracy requirement of the terminal is changed; or,
  • the synchronization instruction information sent by the network side is received.
  • the cell corresponding to the first reference time information is the same as the cell corresponding to the second reference time information.
  • the foregoing terminal 600 in the embodiment of the present invention may be the terminal implemented in the method embodiment shown in FIG. 2. Any implementation manner of the terminal in the method embodiment may be used by the foregoing terminal 600 in the embodiment of the present invention This is achieved and achieves the same beneficial effects. In order to avoid repetition, it will not be repeated here.
  • FIG. 8 is a structural diagram of another terminal provided by an embodiment of the present invention. As shown in FIG. 8, a terminal 800 includes:
  • the sending module 801 is used to send demand information to the network side device
  • the receiving module 802 is configured to receive target reference time information sent by the network side device based on the demand information.
  • the requirement information includes at least one of the following:
  • the foregoing terminal 800 in the embodiment of the present invention may be a terminal implemented in the method embodiment shown in FIG. 4, and any implementation manner of the terminal in the method embodiment shown in FIG. 4 may be used by the embodiment of the present invention.
  • the foregoing terminal 800 in the above is implemented and achieves the same beneficial effects. In order to avoid repetition, details are not described herein again.
  • FIG. 9 is a structural diagram of a network side device provided by an embodiment of the present invention. As shown in FIG. 9, the network side device 900 includes:
  • the receiving module 901 is used to receive demand information sent by the terminal;
  • the sending module 902 is configured to send target reference time information to the terminal in response to the demand information.
  • the requirement information includes at least one of the following:
  • the above-mentioned network side device 900 in the embodiment of the present invention may be a network side device in any implementation manner in the method embodiment shown in FIG. 4 and FIG. 5, and the network side device in the method embodiment shown in FIG. 4 and FIG. Any implementation manner of the side device can be implemented by the above-mentioned network side device 800 in the embodiment of the present invention, and achieve the same beneficial effect. In order to avoid repetition, details are not described herein again.
  • the terminal 1000 includes but is not limited to: a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, User input unit 1007, interface unit 1008, memory 1009, processor 1010, power supply 1011 and other components.
  • a radio frequency unit 1001 a radio frequency unit 1001
  • a network module 1002 an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, User input unit 1007, interface unit 1008, memory 1009, processor 1010, power supply 1011 and other components.
  • the terminal structure shown in FIG. 10 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than those shown in the figure, or combine certain components, or arrange different components.
  • the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.
  • the processor 1010 is used for:
  • the second downlink reference time is: a downlink reference time pre-configured, agreed upon by a protocol, or configured by the network side and located after the first reference time; the first reference time includes: the second downlink reference time The downlink reference time corresponding to the reference time information received or calculated before the time.
  • processor 1010 is also used to:
  • the reference time information corresponding to the second downlink reference time is calculated.
  • the second downlink reference time includes the downlink reference time when the difference is calculated, or the downlink reference time closest to the downlink reference time when the difference is calculated.
  • processor 1010 is also used to:
  • the number of times of the SFN flip is the number of times the SFN of the second downlink reference time is flipped compared to the SFN of the first downlink reference time.
  • the first downlink reference time is any one of the following:
  • the downlink reference time corresponding to the reference time information received or calculated by the terminal for the first time
  • the downlink reference time agreed by the protocol or configured by the network.
  • both the first downlink reference time and the second downlink reference time include at least one of SFN, subframe, and time slot.
  • processor 1010 is also used to:
  • the reference time information corresponding to the second downlink reference time is calculated based on the first downlink reference time and the second downlink reference time, where the trigger condition includes:
  • the internal clock deviation of the terminal is greater than or equal to the clock accuracy; or,
  • the reference time accuracy requirement of the terminal is changed; or,
  • the synchronization instruction information sent by the network side is received.
  • the cell corresponding to the first reference time information is the same as the cell corresponding to the second reference time information.
  • the radio frequency unit 1001 is used for the radio frequency unit 1001 .
  • the requirement information includes at least one of the following:
  • the radio frequency unit 1001 can be used to receive and send signals during information transmission or communication. Specifically, the downlink data from the base station is received and sent to the processor 1010 for processing; in addition, Uplink data is sent to the base station.
  • the radio frequency unit 1001 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
  • the radio frequency unit 1001 can also communicate with the network and other devices through a wireless communication system.
  • the terminal provides users with wireless broadband Internet access through the network module 1002, such as helping users to send and receive emails, browse web pages, and access streaming media.
  • the audio output unit 1003 can convert the audio data received by the radio frequency unit 1001 or the network module 1002 or stored in the memory 1009 into audio signals and output them as sounds. Moreover, the audio output unit 1003 may also provide audio output related to a specific function performed by the terminal 1000 (for example, call signal reception sound, message reception sound, etc.).
  • the audio output unit 1003 includes a speaker, a buzzer, a receiver, and the like.
  • the input unit 1004 is used to receive audio or video signals.
  • the input unit 1004 may include a graphics processing unit (GPU) 10041 and a microphone 10042, and the graphics processor 10041 is configured to respond to still pictures or video images obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. Data is processed.
  • the processed image frame can be displayed on the display unit 1006.
  • the image frame processed by the graphics processor 10041 may be stored in the memory 1009 (or other storage medium) or sent via the radio frequency unit 1001 or the network module 1002.
  • the microphone 10042 can receive sound, and can process such sound into audio data.
  • the processed audio data can be converted into a format that can be sent to a mobile communication base station via the radio frequency unit 1001 in the case of a telephone call mode for output.
  • the terminal 1000 further includes at least one sensor 1005, such as a light sensor, a motion sensor, and other sensors.
  • the light sensor includes an ambient light sensor and a proximity sensor.
  • the ambient light sensor can adjust the brightness of the display panel 10061 according to the brightness of the ambient light.
  • the proximity sensor can turn off the display panel 10061 and the backlight when the terminal 1000 is moved to the ear. .
  • the accelerometer sensor can detect the magnitude of acceleration in various directions (usually three-axis), and can detect the magnitude and direction of gravity when stationary, and can be used to identify terminal gestures (such as horizontal and vertical screen switching, related games, Magnetometer posture calibration), vibration recognition related functions (such as pedometer, percussion), etc.; sensor 1005 can also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared Sensors, etc., will not be repeated here.
  • the display unit 1006 is used to display information input by the user or information provided to the user.
  • the display unit 1006 may include a display panel 10061, and the display panel 10061 may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc.
  • LCD liquid crystal display
  • OLED organic light-emitting diode
  • the user input unit 1007 may be used to receive inputted numeric or character information, and generate key signal input related to user settings and function control of the terminal.
  • the user input unit 1007 includes a touch panel 10071 and other input devices 10072.
  • the touch panel 10071 also called a touch screen, can collect user touch operations on or near it (for example, the user uses any suitable objects or accessories such as fingers, stylus, etc.) on the touch panel 10071 or near the touch panel 10071. operate).
  • the touch panel 10071 may include two parts, a touch detection device and a touch controller.
  • the touch detection device detects the user's touch position, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it To the processor 1010, the command sent by the processor 1010 is received and executed.
  • the touch panel 10071 can be implemented in multiple types such as resistive, capacitive, infrared, and surface acoustic wave.
  • the user input unit 1007 may also include other input devices 10072.
  • other input devices 10072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), trackball, mouse, and joystick, which will not be repeated here.
  • the touch panel 10071 can be overlaid on the display panel 10071.
  • the touch panel 10071 detects a touch operation on or near it, it transmits it to the processor 1010 to determine the type of the touch event, and then the processor 1010 determines the type of touch event according to the touch.
  • the type of event provides corresponding visual output on the display panel 10061.
  • the touch panel 10071 and the display panel 10061 are used as two independent components to implement the input and output functions of the terminal, in some embodiments, the touch panel 10071 and the display panel 10061 may be integrated Realize the input and output functions of the terminal, the specifics are not limited here.
  • the interface unit 1008 is an interface for connecting an external device with the terminal 1000.
  • the external device may include a wired or wireless headset port, an external power source (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, audio input/output (I/O) port, video I/O port, headphone port, etc.
  • the interface unit 1008 can be used to receive input (for example, data information, power, etc.) from an external device and transmit the received input to one or more elements in the terminal 1000 or can be used to communicate between the terminal 1000 and the external device. Transfer data between.
  • the memory 1009 can be used to store software programs and various data.
  • the memory 1009 may mainly include a program storage area and a data storage area.
  • the program storage area may store an operating system, an application program required by at least one function (such as a sound playback function, an image playback function, etc.), etc.; Data created by the use of mobile phones (such as audio data, phone book, etc.), etc.
  • the memory 1009 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.
  • the processor 1010 is the control center of the terminal. It uses various interfaces and lines to connect the various parts of the entire terminal. Various functions and processing data to monitor the terminal as a whole.
  • the processor 1010 may include one or more processing units; preferably, the processor 1010 may integrate an application processor and a modem processor, where the application processor mainly processes the operating system, user interface, application programs, etc., the modem
  • the processor mainly deals with wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 1010.
  • the terminal 1000 may also include a power source 1011 (such as a battery) for supplying power to various components.
  • a power source 1011 such as a battery
  • the power source 1011 may be logically connected to the processor 1010 through a power management system, so as to manage charging, discharging, and power consumption management through the power management system. Function.
  • the terminal 1000 includes some functional modules that are not shown, which will not be repeated here.
  • the embodiment of the present invention also provides a terminal, including a processor 1010, a memory 1009, a computer program stored in the memory 1009 and capable of running on the processor 1010, and the computer program is implemented when the processor 1010 is executed.
  • a terminal including a processor 1010, a memory 1009, a computer program stored in the memory 1009 and capable of running on the processor 1010, and the computer program is implemented when the processor 1010 is executed.
  • the above-mentioned terminal 1000 in this embodiment may be a terminal of any implementation manner in the method embodiment in the embodiment of the present invention, and any implementation manner of the terminal in the method embodiment in the embodiment of the present invention may be used in this embodiment.
  • the above-mentioned terminal 1000 realizes and achieves the same beneficial effects, which will not be repeated here.
  • FIG. 11 is a structural diagram of a network side device provided by an embodiment of the present invention.
  • the network side device 1100 includes: a processor 1101, a transceiver 1102, a memory 1103, and a bus interface, where:
  • the transceiver 1102 is used for:
  • target reference time information is sent to the terminal.
  • the requirement information includes at least one of the following:
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 1101 and various circuits of the memory represented by the memory 1103 are linked together.
  • the bus architecture can also link various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, no further descriptions are provided herein.
  • the bus interface provides the interface.
  • the transceiver 1102 may be a plurality of elements, including a transmitter and a receiver, and provide a unit for communicating with various other devices on the transmission medium.
  • the user interface 1104 may also be an interface capable of connecting externally and internally with required equipment.
  • the connected equipment includes but is not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 1101 is responsible for managing the bus architecture and general processing, and the memory 1103 can store data used by the processor 1101 when performing operations.
  • the above-mentioned network-side device 1100 in this embodiment may be a network-side device of any implementation manner in the method embodiment of the present invention, and any implementation manner of the network-side device in the method embodiment of the present invention It can be implemented by the above-mentioned network side device 1100 in this embodiment, and achieve the same beneficial effect, which will not be repeated here.
  • the embodiment of the present invention also provides a computer-readable storage medium, and a computer program is stored on the computer-readable storage medium.
  • a computer program is stored on the computer-readable storage medium.
  • the computer-readable storage medium such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk, or optical disk, etc.
  • the technical solution of the present invention essentially or the part that contributes to the existing technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, The optical disc) includes several instructions to make a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the method described in each embodiment of the present invention.
  • a terminal which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.

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Abstract

本发明提供一种参考时间信息的获取方法、信息收发方法及相关设备，参考时间信息的获取方法包括：基于第一下行参考时间和第二下行参考时间，计算第二下行参考时间对应的参考时间信息；其中，第二下行参考时间为：预配置、协议约定或者网络侧配置的且位于第一参考时间之后的下行参考时间；第一参考时间包括：在第二下行参考时间之前接收到的或者计算得出的参考时间信息对应的下行参考时间。

Description

参考时间信息的获取方法、信息收发方法及相关设备
相关申请的交叉引用
本申请主张在2020年2月7日在中国提交的中国专利申请号No.202010082997.5的优先权，其全部内容通过引用包含于此。
技术领域
本发明涉及无线通信技术领域，尤其是涉及一种参考时间信息的获取方法、信息收发方法及相关设备。
背景技术
在无线通信技术中，网络侧可以向终端(User Equipment，UE)发送参考时间信息，终端根据接收到的参考时间信息进行时间同步，从而保证终端和网络侧的时间理解一致。但是，由于终端和网络侧设备分别设置有独立的始终，且不同时钟的时钟振荡器可能不同，因而在终端根据网络侧发送的参考信息进行时间同步之后，可能会导致终端的时间相对于网络侧的时间出现偏差。
发明内容
本发明实施例提供一种参考时间信息的获取方法、终端和网络侧设备，以解决现有技术中存在的技术问题。
为了解决上述技术问题，本发明是这样实现的：
第一方面，本发明实施例提供一种参考时间信息的获取方法，应用于终端，包括：
基于第一下行参考时间和第二下行参考时间，计算所述第二下行参考时间对应的参考时间信息；
其中，所述第二下行参考时间为：预配置、协议约定或者网络侧配置的且位于所述第一参考时间之后的下行参考时间；所述第一参考时间包括：在所述第二下行参考时间之前接收到的或者计算得出的参考时间信息对应的下 行参考时间。
第二方面，本发明实施例还提供一种参考时间信息的获取方法，应用于终端，包括：
向网络侧设备发送需求信息；
接收所述网络侧设备基于所述需求信息发送的目标参考时间信息；
基于所述目标参考时间信息，计算所述第二下行参考时间对应的参考时间信息。
第三方面，本发明实施例还提供一种信息收发方法，应用于网络侧设备，包括：
接收终端发送的需求信息；
响应于所述需求信息，向所述终端发送目标参考时间信息。
第四方面，本发明实施例还提供一种终端，包括：
参考时间信息计算模块，用于基于第一下行参考时间和第二下行参考时间，计算所述第二下行参考时间对应的参考时间信息；
其中，所述第二下行参考时间为：预配置、协议约定或者网络侧配置的且位于所述第一参考时间之后的下行参考时间；所述第一参考时间包括：在所述第二下行参考时间之前接收到的或者计算得出的参考时间信息对应的下行参考时间。
第五方面，本发明实施例还提供一种终端，包括：
发送模块，用于向网络侧设备发送需求信息；
接收模块，用于接收所述网络侧设备基于所述需求信息发送的目标参考时间信息；
参考时间信息计算模块，用于基于所述目标参考时间信息，计算所述第二下行参考时间对应的参考时间信息。
第六方面，本发明实施例还提供一种网络侧设备，其特征在于，包括：
接收模块，用于接收终端发送的需求信息；
发送模块，用于响应于所述需求信息，向所述终端发送目标参考时间信息。
第七方面，本发明实施例提供一种终端，包括：存储器、处理器及存储 在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现本发明实施例第一方面或者第二方面提供的参考时间信息的获取方法中的步骤。
第八方面，本发明实施例提供一种网络侧设备，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现本发明实施例第三方面提供的信息收发方法中的步骤。
第九方面，本发明实施例提供一种计算机可读存储介质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现本发明实施例第一方面或者第二方面提供的参考时间信息的获取方法中的步骤，或者第三方面提供的信息收发方法中的步骤。
本发明实施例中，通过基于第一下行参考时间和第二下行参考时间，计算所述第二下行参考时间对应的参考时间信息；其中，所述第二下行参考时间为：预配置、协议约定或者网络侧配置的且位于所述第一参考时间之后的下行参考时间；所述第一参考时间包括：在所述第二下行参考时间之前接收到的或者计算得出的参考时间信息对应的下行参考时间。这样，终端在基于参考时间信息，计算所述第二下行参考时间对应的参考时间信息之后，还可以基于第一下行参考时间和第二下行参考时间计算第二下行参考时间对应的参考时间信息，从而使得终端可以基于计算得到的参考时间信息进行时间同步，以保证终端和网络侧的时间理解一致，进而降低终端的时间相对于网路侧的时间出现偏差的可能性。
附图说明
图1是本发明实施例提供的网络系统的结构图；
图2是本发明实施例提供的参考时间信息的获取方法的流程图之一；
图3是本发明实施例提供的SFN分布的示意图；
图4是本发明实施例提供的参考时间信息的获取方法的流程图之二；
图5是本发明实施例提供的信息收发方法的流程图；
图6是本发明实施例提供的终端的结构示意图之一；
图7是本发明实施例提供的图6中参考时间信息计算模块的结构示意图；
图8是本发明实施例提供的终端的结构示意图之二；
图9是本发明实施例提供的网络侧设备的结构示意图；
图10是本发明实施例提供的终端的硬件结构示意图；
图11是本发明实施例提供的网络侧设备的硬件结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本申请的说明书和权利要求书中的术语“包括”以及它的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。此外，说明书以及权利要求中使用“和/或”表示所连接对象的至少其中之一，例如A和/或B，表示包含单独A，单独B，以及A和B都存在三种情况。
在本发明实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本发明实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
下面结合附图介绍本发明的实施例。本发明提供的实施例可以应用于无线通信系统中。该无线通信系统可以为5G系统，或者演进型长期演进(Evolved Long Term Evolution，eLTE)系统，或者后续演进通信系统。
图1是本发明实施例提供的一种网络系统的结构图，如图1所示，包括终端11、网络侧设备12，其中，终端11可以是移动通信设备，例如：可以是手机、平板电脑(Tablet Personal Computer)、膝上型电脑(Laptop Computer)、个人数字助理(personal digital assistant，PDA)、移动上网装置(Mobile Internet Device，MID)或可穿戴式设备(Wearable Device)等，需要说明的是，在本 发明实施例中并不限定终端11的具体类型。上述网络侧设备12可以是5G网络侧设备(例如：gNB、5G NR NB)，或者可以是4G网络侧设备(例如：eNB)，或者可以是3G网络侧设备(例如：NB)，或者后续演进通信系统中的网络侧设备，等等，需要说明的是，在本发明实施例中并不限定网络侧设备12的具体类型。
图2是本发明实施例提供的应用于图1所示的网络系统的一种参考时间信息的获取方法的流程图。如图2所示，该方法包括以下步骤：
步骤201：基于第一下行参考时间和第二下行参考时间，计算所述第二下行参考时间对应的参考时间信息；
其中，所述第二下行参考时间为：预配置、协议约定或者网络侧配置的且位于所述第一参考时间之后的下行参考时间；所述第一参考时间包括：在所述第二下行参考时间之前接收到的或者计算得出的参考时间信息对应的下行参考时间。
本实施例中，终端可以根据第二下行参考时间以及在第二下行参考时间之前的第一下行参考时间，计算第二下行参考时间对应的参考时间信息，从而可以根据在此之前的任意一次接收到的或者计算得到的参考时间信息获取新的参考时间信息，从而使得终端可以基于新获取的参考时间信息进行时间同步，以保证终端和网络侧的时间理解一致，进而降低终端的时间相对于网路侧的时间出现偏差的可能性。
例如，终端可以是在当前工作的服务小区根据网络侧设备发送的参考时间信息进行首次时间同步，在进行首次时间同步之后，终端可以根据该参考时间信息对应的下行参考时间(即第一下行参考时间)之后的下一个下行参考时间(即第二下行参考时间)，计算得到可以用于第二次时间同步的新的参考时间信息；……，以及根据接收到的参考时间信息对应的下行参考时间或者计算得到的第2至N-1中任一个的下行参考时间对应的参考时间信息，计算得到用于第N次时间同步的新的参考时间信息，N为大于或者等于2的整数。当然，上述第2至N-1中任一个的下行参考时间，可以是网络侧发送的发送的参考时间信息对应的参考时间信息，在此并不限定。
其中，终端根据接收到网络侧设备发送的参考时间信息进行时间同步， 可以是网络侧设备向终端发送用于指示参考时间信息的系统消息(如SIB16)，协议约定终端接收到该参考时间信息对应的时间位置为：用于指示该参考时间信息的系统消息的系统消息发送窗口的结束边界所在的系统帧号的边界(System Frame Number，SFN)。
例如，若终端接收到用于指示参考时间信息的SIB16(即系统消息)的时间位置为(SFN_2，Subframe_1)，且该SIB16的系统消息发送窗口为10个子帧(Subframe)(即1个SFN中有10个子帧)，则终端用于指示上述参考时间信息的SIB16的系统消息窗口的结束边界为(SFN_3，Subframe_1)，即上述参考时间信息对应SFN_3的结束边界时间。
或者，也可以是网络侧设备通过单播消息(如无线资源控制配置(即RRC Reconfiguration)消息等)将参考时间信息发送给终端，且该单播消息中携带一个参考SFN值，协议约定终端接收到的该参考时间信息对应的时间位置为：距离接收该参考时间信息最近的SFN为参考SFN值的系统帧结束边界。
例如，若终端接收到参考时间信息的位置为(SFN_2,subframe_1)，且单播消息中携带的参考SFN值为SFN＝3,则终端收到的参考时间信息与未来第一个SFN＝3的系统帧结束边界对应。
需要说明的是，上述参考时间信息是指绝对时间信息，例如，2020年2月7日8点58分25秒等；上述第一下行参考时间与上述第二下行参考时间是对应不同的绝对时间信息的任意下行参考时间，且下行参考时间可以包括SFN、子帧和时隙中的至少一项，即所述第一下行参考时间和所述第二下行参考时间均包括SFN、子帧和时隙(Slot)中的至少一项。
本实施例中，上述基于第一下行参考时间和第二下行参考时间，计算所述第二下行参考时间对应的参考时间信息，可以理解为终端根据第一下行参考时间和第二下行参考时间，确定第二下行参考时间的边界对应的时间位置，并更新第二下行参考时间对应的参考时间信息为确定的时间位置。然后，可以根据第二下行参考时间对应的参考时间信息调整终端的时钟，以实现时间同步。
在一些实施方式中，上述基于第一下行参考时间和第二下行参考时间，计算所述第二下行参考时间对应的参考时间信息，可以包括：计算所述第一 下行参考时间与所述第二下行参考时间之间的差值；基于所述差值，计算所述第二下行参考时间对应的参考时间信息，即终端可以根据第一下行参考时间与第二下行参考时间之间的差值确定第二下行参考时间的边界对应的时间位置，并对第二下行参考时间对应的参考时间信息进行更新，使得参考时间信息的计算复杂度降低。
需要说明的是，上述基于第一下行参考时间与第二下行参考时间之间的差值，计算所述第二下行参考时间对应的参考时间信息，可以是采用协议约定、预配置或者网络侧配置的计算公式，将差值作为该计算公式的输入量，计算得到第二下行参考时间的边界对应的时间位置。
由于上述第一下行参考时间和第二下行参考时间均包括SFN、子帧和时隙中的至少一项，在此进行多种情况的示例说明，具体如下；
示例一，在上述第一下行参考时间和第二下行参考时间仅包括SFN的情况下，即如图3所示，终端在当前服务小区第一次接收到的参考时间信息referenceTime(1)对应SFN(1)的边界，若上述第一下行参考时间为SFN(m)，SFN(m)对应的参考时间信息可以是接收到的(如SFN(1))或者计算得到的，则终端可以根据如下计算公式(1)计算得到第二下行参考时间中SFN(X)边界对应的时间位置，m和X均为正整数，且X大于m，其中：
latestReferenceTime＝referenceTime(m)+(SFN(X)-SFN(m))·sfnGranularity       (1)
这里，referenceTime(m)对应SFN(m)的边界；
latestReferenceTime表示SFN(X)边界对应的时间位置；
sfnGranularity表示SFN对应的时间粒度(如，sfnGranularity为10ms等)。
示例二，在上述第一下行参考时间和第二下行参考时间包括SFN和subframe(即子帧)的情况下，即终端在当前服务小区第一次接收到的参考时间信息referenceTime(1)对应如图3中所示的SFN(1)中subframe(1)的边界，若上述第一下行参考时间为SFN(m)中subframe(k)，则终端可以根据如下计算公式(2)计算得到第二下行参考时间中SFN(X)中subframe(y)边界对应的时间位置，k和y均为正整数，其中：
latestReferenceTime＝referenceTime(m)+ (SFN(X)-SFN(m))·sfnGranularity+(subframe(y)-subframe(k))·subframeGranularity        (2)
这里，referenceTime(m)对应SFN(m)中subframe(k)的边界；
latestReferenceTime表示SFN(X)中subframe(y)边界对应的时间位置；
subframeGranularity表示subframe对应的时间粒度(如1ms等)。
示例三，在上述第一下行参考时间和第二下行参考时间包括SFN和slot(即时隙)的情况下，即终端在当前服务小区第一次接收到的参考时间信息referenceTime(1)对应如图3中所示的SFN(1)中slot(1)的边界，若上述第一下行参考时间为SFN(m)中slot(i)，则终端可以根据如下计算公式(3)计算得到第二下行参考时间中SFN(X)中slot(z)边界对应的时间位置，i和z均为正整数，其中：
latestReferenceTime＝referenceTime(m)+(SFN(X)-SFN(m))·sfnGranularity+(slot(z)-slot(i))·slotGranularity    (3)
这里，referenceTime(m)对应SFN(m)中subframe(i)的边界；
latestReferenceTime表示SFN(X)中slot(z)边界对应的时间位置；
slotGranularity表示slot对应的时间粒度(如0.5ms等)。
由于SFN编号的取值范围有限，第二下行参考时间的SFN可能相对于第一下行参考时间的SFN发生至少一次SFN编号翻转，在一些实施方式中，所述基于所述差值，计算所述第二下行参考时间对应的参考时间信息，包括：基于所述差值和系统帧号SFN翻转次数，计算所述第二下行参考时间对应的参考时间信息；其中，所述SFN翻转次数为所述第二下行参考时间的SFN相较于所述第一下行参考时间的SFN发生翻转的次数，从而在第二下行参考时间的SFN相对于第一下行参考时间的SFN发生的情况下，可以准确地确定第二下行参考时间的边界对应的时间位置，保证计算得到的参考时间信息的准确度。
例如，在上述第一下行参考时间和第二下行参考时间仅包括SFN的情况下，即如图3所示，终端在当前服务小区第一次接收到的参考时间信息referenceTime(1)对应SFN(1)的边界，若上述第一下行参考时间为SFN(m)，且SFN(X)与SFN(m)比较发生了SFN编号翻转，则终端可以根据如下 计算公式(4)计算得到第二下行参考时间中SFN(X)边界对应的时间位置，其中：
latestReferenceTime＝referenceTime(m)+((SFN(X)-SFN(m))+maxSFN·numOfWrap)·sfnGranularity    (4)
这里，referenceTime(m)对应SFN(m)的边界；
maxSFN标识SFN编号范围；
numOfWrap标识SFN(x)相对于SFN(1)发生翻转的次数。
需要说明的是，上述示例中仅以第一下行参考时间为终端在当前服务小区第一次接收到的参考时间信息对应的下行参考时间为例进行说明，而第一下行参考时间实际上可以是在上述第二下行参考时间之前的任一个下行参考时间。
在一些实施方式中，上述第一下行参考时间可以为如下任一项：
所述终端第一次接收到或者计算得到的参考时间信息对应的下行参考时间；
计算所述差值时前一次接收到或者计算得到的参考时间信息对应的下行参考时间；
协议约定或网络配置的下行参考时间。
其中，上述终端第一次接收的参考时间信息，可以理解为：当终端首次接入目标小区时(如，连接态终端切换到目标小区，或空闲态终端重选到目标小区)，首次从目标小区接收的参考时间信息；或者，终端在需要进行时间同步的时候，从目标小区接收的参考时间信息(如，通过读取系统信息获取的参考时间信息；或在发送参考时间请求信息后，网络侧设备通过专属信令发送给终端的参考时间信息)。
另外，上述第二下行参考时间可以是在终端进行首次时间同步之后的任一下行参考时间，具体地，所述第二下行参考时间包括计算所述差值时的下行参考时间，或者，距离计算所述差值时的下行参考时间最近的下行参考时间，从而使终端可以更加及时地同步时间。
例如，每一SFN包括时长为10ms的10个子帧，若终端在SFN(j)的第4个子帧的边界的时间位置(即4ms)计算上述差值，j为大于1的正整数， 则上述第二下行参考时间可以为SFN(j-1)或SFN(j)；若终端在SFN(j)的第7个子帧的边界的时间位置(即7ms)计算上述差值，则上述第二下行参考时间可以为SFN(j+1)或SFN(j)。
需要说明的是，上述终端基于第一下行参考时间和第二下行参考时间，计算所述第二下行参考时间对应的参考时间信息，可以是在任意场景下进行，在此并不进行限定。
在一些实施方式中，上述基于第一下行参考时间和第二下行参考时间，计算所述第二下行参考时间对应的参考时间信息，包括：
在所述终端满足触发条件的情况下，基于第一下行参考时间和第二下行参考时间，计算所述第二下行参考时间对应的参考时间信息，其中，所述触发条件包括：
所述终端的内部时钟偏差大于或者等于时钟精度，例如，终端在接收到参考时间信息经过10s后其内部时钟偏差为1us，且时钟精度为1us；或者，
所述终端的参考时间精度需求发生变更，例如，终端在接收到参考时间信息时终端的时间精度需求为10us，而当前终端的时间精度需求变更为1us；或者，
接收到网络侧发送的同步指示信息，例如，网络侧设备发送1bit指示UE需要再次进行时间同步，具体地，网络侧设备指示SFN编号，终端将该SFN编号作为上述第二下行参考时间，并计算所述第二下行参考时间对应的参考时间信息。
这里，终端仅在满足上述触发条件的情况下，基于第一下行参考时间和第二下行参考时间，计算所述第二下行参考时间对应的参考时间信息，避免终端计算参考时间信息过于频繁，实现终端能耗的降低。
另外，在一些实施方式中，所述第一参考时间信息对应的小区与所述第二参考时间信息对应的小区相同，可以进一步保证计算得到的参考时间信息的准确性。
例如，终端接收的参考时间信息(即该参考时间信息对应的下行参考时间为上述第一下行参考时间)对应为小区1，而终端当前的服务小区仍然包括小区1，即第二参考时间信息对应的小区为小区1，则终端可以基于第一下 行参考时间和第二下行参考时间，计算第二下行参考时间对应的参考时间信息。当然，若终端当前的服务小区(或UE当前的主小区PCell或主辅小区PSCell)变更成了小区2，即第二参考时间信息对应的小区为小区2，则终端在发生时钟偏差的时候需要重新上报时间信息请求信息。
图4是本发明实施例提供的应用于图1所示的网络系统的另一种参考时间信息的获取方法。如图4所示，该方法包括如下步骤：
步骤401：向网络侧设备发送需求信息；
步骤402：接收所述网络侧设备基于所述需求信息发送的目标参考时间信息。
这里，当终端需要再次通过接收网络侧设备发送的参考时间信息进行时间同步时，终端可以向网络侧设备发送需求信息，网络侧设备在接收到该需求信息时，网络侧设备响应于该需求信息向终端反馈目标参考时间信息，从而使终端根据自身需求及时指示网络侧设备发送参考时间信息，使得终端可以基于新接收到的目标参考时间信息进行时间同步，以保证终端和网络侧的时间理解一致，进而降低终端的时间相对于网路侧的时间出现偏差的可能性。
本实施例中，上述需求信息可以是任何用于指示网络侧设备发送上述目标参考时间信息的信息，例如，上述需求信息是用于请求网络侧设备发送一次参考时间信息的信息，等等。
在一些实施方式中，上述需求信息可以包括如下至少一项：
时间信息更新周期；
所述终端的时钟精度信息。
其中，在上述需求信息包括上述时间信息更新周期的情况下，网络侧设备在接收到上述需求信息之后，可以按照时间信息更新周期向终端周期性地发送参考时间信息，实现终端周期性地接收到网络侧设备发送的参考时间信息，并可以进行时间同步。
例如，上述时间信息更新周期可以是10s，即网络侧设备在接收到上述需求信息之后，间隔10s向网络侧设备发送一次参考时间信息，且终端可以根据每次接收的参考时间信息进行时间同步。
另外，在上述需求信息包括上述终端的时钟精度信息的情况下，网络侧 设备可以根据终端的时间精度信息灵活地向终端发送参考时间信息，例如，在上述终端的时钟精度信息为1us的情况下，若网络侧设备确定终端的内容时钟每10s会产生最大1us的误差，则网络侧设备可以间隔10s或者以小于10s的间隔时间向终端发送参考时间信息。
图5是本发明实施例提供的应用于图1所示的网络系统的信息收发方法的流程图。如图5所示，信息收发方法应用于网络侧设备，该方法包括以下步骤：
步骤501：接收终端发送的需求信息。
步骤502：响应于所述需求信息，向所述终端发送目标参考时间信息。
可选的，所述需求信息包括如下至少一项：
时间信息更新周期；
所述终端的时钟精度信息。
需要说明的是，本发明实施例作为图5所示的实施例对应的网络侧设备的实施例，其具体的实施方式可以参见图4所示的实施例的相关说明，并能够达到相同的有益效果，为了避免重复说明，此处不再赘述。
图6是本发明实施例提供的一种终端的结构图，如图6所示，终端600包括：
参考时间信息计算模块601，用于基于第一下行参考时间和第二下行参考时间，计算所述第二下行参考时间对应的参考时间信息；
其中，所述第二下行参考时间为：预配置、协议约定或者网络侧配置的且位于所述第一参考时间之后的下行参考时间；所述第一参考时间包括：在所述第二下行参考时间之前接收到的或者计算得出的参考时间信息对应的下行参考时间。
可选的，如图7所示，所述参考时间信息计算模块601，包括：
计算单元6011，用于计算所述第一下行参考时间与所述第二下行参考时间之间的差值；
参考时间信息计算单元6012，用于基于所述差值，计算所述第二下行参考时间对应的参考时间信息。
可选的，所述第二下行参考时间包括计算所述差值时的下行参考时间， 或者，距离计算所述差值时的下行参考时间最近的下行参考时间。
可选的，所述参考时间信息计算单元6012，具体用于：
基于所述差值和系统帧号SFN翻转次数，计算所述第二下行参考时间对应的参考时间信息；
其中，所述SFN翻转次数为所述第二下行参考时间的SFN相较于所述第一下行参考时间的SFN发生翻转的次数。
可选的，所述第一下行参考时间为如下任一项：
所述终端第一次接收到或者计算得到的参考时间信息对应的下行参考时间；
计算所述差值时前一次接收到或者计算得到的参考时间信息对应的下行参考时间；
协议约定或网络配置的下行参考时间。
可选的，所述第一下行参考时间和所述第二下行参考时间均包括SFN、子帧和时隙中的至少一项。
可选的，所述参考时间信息计算模块601，具体用于：
在所述终端满足触发条件的情况下，基于第一下行参考时间和第二下行参考时间，计算所述第二下行参考时间对应的参考时间信息，其中，所述触发条件包括：
所述终端的内部时钟偏差大于或者等于时钟精度；或者，
所述终端的参考时间精度需求发生变更；或者，
接收到网络侧发送的同步指示信息。
可选的，所述第一参考时间信息对应的小区与所述第二参考时间信息对应的小区相同。
需要说明的是，本发明实施例中上述终端600可以是图2所示的方法实施例中实施方式的终端，方法实施例中终端的任意实施方式都可以被本发明实施例中的上述终端600所实现，并达到相同的有益效果，为避免重复，此处不再赘述。
图8是本发明实施例提供的另一种终端的结构图，如图8所示，终端800包括：
发送模块801，用于向网络侧设备发送需求信息；
接收模块802，用于接收所述网络侧设备基于所述需求信息发送的目标参考时间信息。
可选的，所述需求信息包括如下至少一项：
时间信息更新周期；
所述终端的时钟精度信息。
需要说明的是，本发明实施例中上述终端800可以是图4所示的方法实施例中实施方式的终端，图4所示的方法实施例中终端的任意实施方式都可以被本发明实施例中的上述终端800所实现，并达到相同的有益效果，为避免重复，此处不再赘述。
图9是本发明实施例提供的一种网络侧设备的结构图，如图9所示，网络侧设备900包括：
接收模块901，用于接收终端发送的需求信息；
发送模块902，用于响应于所述需求信息，向所述终端发送目标参考时间信息。
可选的，所述需求信息包括如下至少一项：
时间信息更新周期；
所述终端的时钟精度信息。
需要说明的是，本发明实施例中上述网络侧设备900可以是图4和图5所示的方法实施例中任意实施方式的网络侧设备，图4和图5所示的方法实施例中网络侧设备的任意实施方式都可以被本发明实施例中的上述网络侧设备800所实现，并达到相同的有益效果，为避免重复，此处不再赘述。
图10为实现本发明各个实施例的一种终端的硬件结构示意图，该终端1000包括但不限于：射频单元1001、网络模块1002、音频输出单元1003、输入单元1004、传感器1005、显示单元1006、用户输入单元1007、接口单元1008、存储器1009、处理器1010、以及电源1011等部件。本领域技术人员可以理解，图10中示出的终端结构并不构成对终端的限定，终端可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。在本发明实施例中，终端包括但不限于手机、平板电脑、笔记本电脑、掌上电脑、 车载终端、可穿戴设备、以及计步器等。
其中，处理器1010用于：
基于第一下行参考时间和第二下行参考时间，计算所述第二下行参考时间对应的参考时间信息；
其中，所述第二下行参考时间为：预配置、协议约定或者网络侧配置的且位于所述第一参考时间之后的下行参考时间；所述第一参考时间包括：在所述第二下行参考时间之前接收到的或者计算得出的参考时间信息对应的下行参考时间。
可选的，处理器1010还用于：
计算所述第一下行参考时间与所述第二下行参考时间之间的差值；
基于所述差值，计算所述第二下行参考时间对应的参考时间信息。
可选的，所述第二下行参考时间包括计算所述差值时的下行参考时间，或者，距离计算所述差值时的下行参考时间最近的下行参考时间。
可选的，处理器1010还用于：
基于所述差值和系统帧号SFN翻转次数，计算所述第二下行参考时间对应的参考时间信息；
其中，所述SFN翻转次数为所述第二下行参考时间的SFN相较于所述第一下行参考时间的SFN发生翻转的次数。
可选的，所述第一下行参考时间为如下任一项：
所述终端第一次接收到或者计算得到的参考时间信息对应的下行参考时间；
计算所述差值时前一次接收到或者计算得到的参考时间信息对应的下行参考时间；
协议约定或网络配置的下行参考时间。
可选的，所述第一下行参考时间和所述第二下行参考时间均包括SFN、子帧和时隙中的至少一项。
可选的，处理器1010还用于：
在所述终端满足触发条件的情况下，基于第一下行参考时间和第二下行参考时间，计算所述第二下行参考时间对应的参考时间信息，其中，所述触 发条件包括：
所述终端的内部时钟偏差大于或者等于时钟精度；或者，
所述终端的参考时间精度需求发生变更；或者，
接收到网络侧发送的同步指示信息。
可选的，所述第一参考时间信息对应的小区与所述第二参考时间信息对应的小区相同。
或者，射频单元1001用于
向网络侧设备发送需求信息；
接收所述网络侧设备基于所述需求信息发送的目标参考时间信息。
可选的，所述需求信息包括如下至少一项：
时间信息更新周期；
所述终端的时钟精度信息。
应理解的是，本发明实施例中，射频单元1001可用于收发信息或通话过程中，信号的接收和发送，具体的，将来自基站的下行数据接收后，给处理器1010处理；另外，将上行的数据发送给基站。通常，射频单元1001包括但不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器、双工器等。此外，射频单元1001还可以通过无线通信系统与网络和其他设备通信。
终端通过网络模块1002为用户提供了无线的宽带互联网访问，如帮助用户收发电子邮件、浏览网页和访问流式媒体等。
音频输出单元1003可以将射频单元1001或网络模块1002接收的或者在存储器1009中存储的音频数据转换成音频信号并且输出为声音。而且，音频输出单元1003还可以提供与终端1000执行的特定功能相关的音频输出(例如，呼叫信号接收声音、消息接收声音等等)。音频输出单元1003包括扬声器、蜂鸣器以及受话器等。
输入单元1004用于接收音频或视频信号。输入单元1004可以包括图形处理器(Graphics Processing Unit，GPU)10041和麦克风10042，图形处理器10041对在视频捕获模式或图像捕获模式中由图像捕获装置(如摄像头)获得的静态图片或视频的图像数据进行处理。处理后的图像帧可以显示在显示单元1006上。经图形处理器10041处理后的图像帧可以存储在存储器1009 (或其它存储介质)中或者经由射频单元1001或网络模块1002进行发送。麦克风10042可以接收声音，并且能够将这样的声音处理为音频数据。处理后的音频数据可以在电话通话模式的情况下转换为可经由射频单元1001发送到移动通信基站的格式输出。
终端1000还包括至少一种传感器1005，比如光传感器、运动传感器以及其他传感器。具体地，光传感器包括环境光传感器及接近传感器，其中，环境光传感器可根据环境光线的明暗来调节显示面板10061的亮度，接近传感器可在终端1000移动到耳边时，关闭显示面板10061以及背光。作为运动传感器的一种，加速计传感器可检测各个方向上(一般为三轴)加速度的大小，静止时可检测出重力的大小及方向，可用于识别终端姿态(比如横竖屏切换、相关游戏、磁力计姿态校准)、振动识别相关功能(比如计步器、敲击)等；传感器1005还可以包括指纹传感器、压力传感器、虹膜传感器、分子传感器、陀螺仪、气压计、湿度计、温度计、红外线传感器等，在此不再赘述。
显示单元1006用于显示由用户输入的信息或提供给用户的信息。显示单元1006可包括显示面板10061，可以采用液晶显示器(Liquid Crystal Display，LCD)、有机发光二极管(Organic Light-Emitting Diode,OLED)等形式来配置显示面板10061。
用户输入单元1007可用于接收输入的数字或字符信息，以及产生与终端的用户设置以及功能控制有关的键信号输入。具体地，用户输入单元1007包括触控面板10071以及其他输入设备10072。触控面板10071，也称为触摸屏，可收集用户在其上或附近的触摸操作(比如用户使用手指、触笔等任何适合的物体或附件在触控面板10071上或在触控面板10071附近的操作)。触控面板10071可包括触摸检测装置和触摸控制器两个部分。其中，触摸检测装置检测用户的触摸方位，并检测触摸操作带来的信号，将信号传送给触摸控制器；触摸控制器从触摸检测装置上接收触摸信息，并将它转换成触点坐标，再送给处理器1010，接收处理器1010发来的命令并加以执行。此外，可以采用电阻式、电容式、红外线以及表面声波等多种类型实现触控面板10071。除了触控面板10071，用户输入单元1007还可以包括其他输入设备10072。具体地，其他输入设备10072可以包括但不限于物理键盘、功能键(比如音 量控制按键、开关按键等)、轨迹球、鼠标、操作杆，在此不再赘述。
进一步的，触控面板10071可覆盖在显示面板10071上，当触控面板10071检测到在其上或附近的触摸操作后，传送给处理器1010以确定触摸事件的类型，随后处理器1010根据触摸事件的类型在显示面板10061上提供相应的视觉输出。虽然在图10中，触控面板10071与显示面板10061是作为两个独立的部件来实现终端的输入和输出功能，但是在某些实施例中，可以将触控面板10071与显示面板10061集成而实现终端的输入和输出功能，具体此处不做限定。
接口单元1008为外部装置与终端1000连接的接口。例如，外部装置可以包括有线或无线头戴式耳机端口、外部电源(或电池充电器)端口、有线或无线数据端口、存储卡端口、用于连接具有识别模块的装置的端口、音频输入/输出(I/O)端口、视频I/O端口、耳机端口等等。接口单元1008可以用于接收来自外部装置的输入(例如，数据信息、电力等等)并且将接收到的输入传输到终端1000内的一个或多个元件或者可以用于在终端1000和外部装置之间传输数据。
存储器1009可用于存储软件程序以及各种数据。存储器1009可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序(比如声音播放功能、图像播放功能等)等；存储数据区可存储根据手机的使用所创建的数据(比如音频数据、电话本等)等。此外，存储器1009可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。
处理器1010是终端的控制中心，利用各种接口和线路连接整个终端的各个部分，通过运行或执行存储在存储器1009内的软件程序以及模块，以及调用存储在存储器1009内的数据，执行终端的各种功能和处理数据，从而对终端进行整体监控。处理器1010可包括一个或多个处理单元；优选的，处理器1010可集成应用处理器和调制解调处理器，其中，应用处理器主要处理操作系统、用户界面和应用程序等，调制解调处理器主要处理无线通信。可以理解的是，上述调制解调处理器也可以不集成到处理器1010中。
终端1000还可以包括给各个部件供电的电源1011(比如电池)，优选的， 电源1011可以通过电源管理系统与处理器1010逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。
另外，终端1000包括一些未示出的功能模块，在此不再赘述。
优选的，本发明实施例还提供一种终端，包括处理器1010，存储器1009，存储在存储器1009上并可在所述处理器1010上运行的计算机程序，该计算机程序被处理器1010执行时实现上述参考时间信息的获取方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
需要说明的是，本实施例中上述终端1000可以是本发明实施例中方法实施例中任意实施方式的终端，本发明实施例中方法实施例中终端的任意实施方式都可以被本实施例中的上述终端1000所实现，以及达到相同的有益效果，此处不再赘述。
图11是本发明实施例提供的一种网络侧设备的结构图。如图11所示，网络侧设备1100包括：处理器1101、收发机1102、存储器1103和总线接口，其中：
收发机1102用于：
接收终端发送的需求信息；
响应于所述需求信息，向所述终端发送目标参考时间信息。
可选的，所述需求信息包括如下至少一项：
时间信息更新周期；
所述终端的时钟精度信息。
在图11中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1101代表的一个或多个处理器和存储器1103代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机1102可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元。针对不同的终端，用户接口1104还可以是能够外接内接需要设备的接口，连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器1101负责管理总线架构和通常的处理，存储器1103可以存储处 理器1101在执行操作时所使用的数据。
需要说明的是，本实施例中上述网络侧设备1100可以是本发明实施例中方法实施例中任意实施方式的网络侧设备，本发明实施例中方法实施例中网络侧设备的任意实施方式都可以被本实施例中的上述网络侧设备1100所实现，以及达到相同的有益效果，此处不再赘述。
本发明实施例还提供一种计算机可读存储介质，计算机可读存储介质上存储有计算机程序，该计算机程序被处理器执行时实现上述对应于终端或者网络侧的实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。其中，所述的计算机可读存储介质，如只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端(可以是手机，计算机，服务器，空调器，或者网络设备等)执行本发明各个实施例所述的方法。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以权利要求的保护范围为准。

Claims (27)

  1. 一种参考时间信息的获取方法，应用于终端，包括：
    基于第一下行参考时间和第二下行参考时间，计算所述第二下行参考时间对应的参考时间信息；
    其中，所述第二下行参考时间为：预配置、协议约定或者网络侧配置的且位于所述第一参考时间之后的下行参考时间；所述第一参考时间包括：在所述第二下行参考时间之前接收到的或者计算得出的参考时间信息对应的下行参考时间。
  2. 根据权利要求1所述的方法，其中，所述基于第一下行参考时间和第二下行参考时间，计算所述第二下行参考时间对应的参考时间信息，包括：
    计算所述第一下行参考时间与所述第二下行参考时间之间的差值；
    基于所述差值，计算所述第二下行参考时间对应的参考时间信息。
  3. 根据权利要求2所述的方法，其中，所述第二下行参考时间包括计算所述差值时的下行参考时间，或者，距离计算所述差值时的下行参考时间最近的下行参考时间。
  4. 根据权利要求2所述的方法，其中，所述基于所述差值，计算第二下行参考时间对应的参考时间信息，包括：
    基于所述差值和系统帧号SFN翻转次数，计算所述第二下行参考时间对应的参考时间信息；
    其中，所述SFN翻转次数为所述第二下行参考时间的SFN相较于所述第一下行参考时间的SFN发生翻转的次数。
  5. 根据权利要求1所述的方法，其中，所述第一下行参考时间为如下任一项：
    所述终端第一次接收到或者计算得到的参考时间信息对应的下行参考时间；
    计算所述差值时前一次接收到或者计算得到的参考时间信息对应的下行参考时间；
    协议约定或网络配置的下行参考时间。
  6. 根据权利要求1所述的方法，其中，所述第一下行参考时间和所述第二下行参考时间均包括SFN、子帧和时隙中的至少一项。
  7. 根据权利要求1所述的方法，其中，所述基于第一下行参考时间和第二下行参考时间，计算所述第二下行参考时间对应的参考时间信息，包括：
    在所述终端满足触发条件的情况下，基于第一下行参考时间和第二下行参考时间，计算所述第二下行参考时间对应的参考时间信息，其中，所述触发条件包括：
    所述终端的内部时钟偏差大于或者等于时钟精度；或者，
    所述终端的参考时间精度需求发生变更；或者，
    接收到网络侧发送的同步指示信息。
  8. 根据权利要求1所述的方法，其中，所述第一参考时间信息对应的小区与所述第二参考时间信息对应的小区相同。
  9. 一种参考时间信息的获取方法，应用于终端，包括：
    向网络侧设备发送需求信息；
    接收所述网络侧设备基于所述需求信息发送的目标参考时间信息。
  10. 根据权利要求9所述的方法，其中，所述需求信息包括如下至少一项：
    时间信息更新周期；
    所述终端的时钟精度信息。
  11. 一种信息收发方法，应用于网络侧设备，包括：
    接收终端发送的需求信息；
    响应于所述需求信息，向所述终端发送目标参考时间信息。
  12. 根据权利要求11所述的方法，其中，所述需求信息包括如下至少一项：
    时间信息更新周期；
    所述终端的时钟精度信息。
  13. 一种终端，包括：
    参考时间信息计算模块，用于基于第一下行参考时间和第二下行参考时间，计算所述第二下行参考时间对应的参考时间信息；
    其中，所述第二下行参考时间为：预配置、协议约定或者网络侧配置的 且位于所述第一参考时间之后的下行参考时间；所述第一参考时间包括：在所述第二下行参考时间之前接收到的或者计算得出的参考时间信息对应的下行参考时间。
  14. 根据权利要求13所述的终端，其中，所述参考时间信息计算模块，包括：
    计算单元，用于计算所述第一下行参考时间与所述第二下行参考时间之间的差值；
    参考时间信息计算单元，用于基于所述差值，计算所述第二下行参考时间对应的参考时间信息。
  15. 根据权利要求14所述的终端，其中，所述第二下行参考时间包括计算所述差值时的下行参考时间，或者，距离计算所述差值时的下行参考时间最近的下行参考时间。
  16. 根据权利要求14所述的终端，其中，所述参考时间信息计算单元，具体用于：
    基于所述差值和系统帧号SFN翻转次数，计算所述第二下行参考时间对应的参考时间信息；
    其中，所述SFN翻转次数为所述第二下行参考时间的SFN相较于所述第一下行参考时间的SFN发生翻转的次数。
  17. 根据权利要求13所述的终端，其中，所述第一下行参考时间为如下任一项：
    所述终端第一次接收到或者计算得到的下行参考时间；
    计算所述差值时前一次接收到或者计算得到的参考时间信息对应的下行参考时间；
    协议约定或网络配置的下行参考时间。
  18. 根据权利要求13所述的终端，其中，所述第一下行参考时间和所述第二下行参考时间均包括SFN、子帧和时隙中的至少一项。
  19. 根据权利要求13所述的终端，其中，所述参考时间信息计算模块，具体用于：
    在所述终端满足触发条件的情况下，基于第一下行参考时间和第二下行 参考时间，计算所述第二下行参考时间对应的参考时间信息，其中，所述触发条件包括：
    所述终端的内部时钟偏差大于或者等于时钟精度；或者，
    所述终端的参考时间精度需求发生变更；或者，
    接收到网络侧发送的同步指示信息。
  20. 根据权利要求13所述的终端，其中，所述第一参考时间信息对应的小区与所述第二参考时间信息对应的小区相同。
  21. 一种终端，包括：
    发送模块，用于向网络侧设备发送需求信息；
    接收模块，用于接收所述网络侧设备基于所述需求信息发送的目标参考时间信息。
  22. 根据权利要求21所述的终端，其中，所述需求信息包括如下至少一项：
    时间信息更新周期；
    所述终端的时钟精度信息。
  23. 一种网络侧设备，包括：
    接收模块，用于接收终端发送的需求信息；
    发送模块，用于响应于所述需求信息，向所述终端发送目标参考时间信息。
  24. 根据权利要求23所述的网络侧设备，其中，所述需求信息包括如下至少一项：
    时间信息更新周期；
    所述终端的时钟精度信息。
  25. 一种终端，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如权利要求1至10中任一项所述的参考时间信息的获取方法中的步骤。
  26. 一种网络侧设备，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如权利要求11或12所述的信息收发方法中的步骤。
  27. 一种计算机可读存储介质，其上存储有计算机程序，所述计算机程序被处理器执行时实现如权利要求1至10中任一项所述的参考时间信息的获取方法中的步骤；或者，实现如权利要求11或12所述的信息收发方法中的步骤。
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