CN113260038A - Acquisition method of reference time information, information transceiving method and related equipment - Google Patents
Acquisition method of reference time information, information transceiving method and related equipment Download PDFInfo
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Abstract
The invention provides a method for acquiring reference time information, an information transceiving method and related equipment, wherein the method for acquiring the reference time information comprises the following steps: calculating reference time information corresponding to second downlink reference time based on first downlink reference time and the second downlink reference time; wherein the second downlink reference time is: a downlink reference time which is configured in advance, agreed by a protocol or configured by a network side and is positioned after the first reference time; the first reference time includes: and the downlink reference time corresponding to the reference time information received or calculated before the second downlink reference time. According to the method for acquiring the reference time information, the terminal can acquire the new reference time information, so that the terminal can perform time synchronization based on the calculated reference time information, the time comprehension of the terminal and the time comprehension of the network side are consistent, and the possibility that the time of the terminal is deviated relative to the time of the network side is reduced.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method for acquiring reference time information, a method for receiving and transmitting information, and related devices.
Background
In the wireless communication technology, a network side may send reference time information to a terminal (User Equipment, UE), and the terminal performs time synchronization according to the received reference time information, thereby ensuring that time comprehension of the terminal and the network side is consistent. However, since the terminal and the network side device are respectively provided with independent clocks, and the clock oscillators of different clocks may be different, after the terminal performs time synchronization according to the reference information transmitted by the network side, a deviation of the time of the terminal with respect to the time of the network side may be caused.
Disclosure of Invention
The embodiment of the invention provides a method for acquiring reference time information, a terminal and network side equipment, which aim to solve the technical problems in the prior art.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a method for acquiring reference time information, which is applied to a terminal and includes:
calculating reference time information corresponding to second downlink reference time based on first downlink reference time and the second downlink reference time;
wherein the second downlink reference time is: a downlink reference time which is configured in advance, agreed by a protocol or configured by a network side and is positioned after the first reference time; the first reference time includes: and the downlink reference time corresponding to the reference time information received or calculated before the second downlink reference time.
In a second aspect, an embodiment of the present invention further provides a method for acquiring reference time information, which is applied to a terminal, and includes:
sending the demand information to the network side equipment;
receiving target reference time information sent by the network side equipment based on the demand information;
and calculating reference time information corresponding to the second downlink reference time based on the target reference time information.
In a third aspect, an embodiment of the present invention further provides an information transceiving method, applied to a network side device, including:
receiving demand information sent by a terminal;
and responding to the demand information, and sending target reference time information to the terminal.
In a fourth aspect, an embodiment of the present invention further provides a terminal, including:
a reference time information calculation module, configured to calculate, based on a first downlink reference time and a second downlink reference time, reference time information corresponding to the second downlink reference time;
wherein the second downlink reference time is: a downlink reference time which is configured in advance, agreed by a protocol or configured by a network side and is positioned after the first reference time; the first reference time includes: and the downlink reference time corresponding to the reference time information received or calculated before the second downlink reference time.
In a fifth aspect, an embodiment of the present invention further provides a terminal, including:
the sending module is used for sending the demand information to the network side equipment;
a receiving module, configured to receive target reference time information sent by the network side device based on the demand information;
and a reference time information calculation module, configured to calculate, based on the target reference time information, reference time information corresponding to the second downlink reference time.
In a sixth aspect, an embodiment of the present invention further provides a network-side device, where the network-side device includes:
the receiving module is used for receiving the demand information sent by the terminal;
and the sending module is used for responding to the demand information and sending target reference time information to the terminal.
In a seventh aspect, an embodiment of the present invention provides a terminal, including: the device comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein when the computer program is executed by the processor, the steps in the method for acquiring reference time information provided by the first aspect or the second aspect of the embodiment of the invention are realized.
In an eighth aspect, an embodiment of the present invention provides a network side device, including: a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the steps in the information transceiving method provided by the third aspect of the embodiments of the present invention.
In a ninth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and the computer program, when executed by a processor, implements the steps in the method for acquiring reference time information provided in the first aspect or the second aspect of the embodiment of the present invention, or the steps in the method for transceiving information provided in the third aspect of the embodiment of the present invention.
In the embodiment of the invention, reference time information corresponding to second downlink reference time is calculated based on first downlink reference time and second downlink reference time; wherein the second downlink reference time is: a downlink reference time which is configured in advance, agreed by a protocol or configured by a network side and is positioned after the first reference time; the first reference time includes: and the downlink reference time corresponding to the reference time information received or calculated before the second downlink reference time. In this way, after the terminal calculates the reference time information corresponding to the second downlink reference time based on the reference time information, the reference time information corresponding to the second downlink reference time may also be calculated based on the first downlink reference time and the second downlink reference time, so that the terminal may 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 that the time of the terminal is deviated from the time of the network side.
Drawings
Fig. 1 is a block diagram of a network system provided in an embodiment of the present invention;
fig. 2 is one of flowcharts of a method for acquiring reference time information according to an embodiment of the present invention;
fig. 3 is a schematic diagram of SFN distribution provided by an embodiment of the present invention;
fig. 4 is a second flowchart of a method for acquiring reference time information according to an embodiment of the present invention;
fig. 5 is a flowchart of an information transceiving method according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a reference time information calculation module in fig. 6 according to an embodiment of the present invention;
fig. 8 is a second schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a network-side device according to an embodiment of the present invention;
fig. 10 is a schematic diagram of a hardware structure of a terminal according to an embodiment of the present invention;
fig. 11 is a schematic hardware structure diagram of a network-side device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "comprises," "comprising," or any other variation thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means that at least one of the connected objects, such as a and/or B, means that three cases, a alone, B alone, and both a and B, exist.
In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
Embodiments of the present invention are described below with reference to the accompanying drawings. The embodiment provided by the invention can be applied to a wireless communication system. The wireless communication system may be a 5G system, or an Evolved Long Term Evolution (lte) system, or a subsequent Evolved communication system.
Fig. 1 is a structural diagram of a network system according to an embodiment of the present invention, as shown in fig. 1, including a terminal 11 and a network-side device 12, where the terminal 11 may be a mobile communication device, for example: the terminal may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device), and the specific type of the terminal 11 is not limited in the embodiments of the present invention. The network side device 12 may be a 5G network side device (e.g., a gNB, a 5G NR NB), or may be a 4G network side device (e.g., an eNB), or may be a 3G network side device (e.g., an NB), or a network side device in a subsequent evolved communication system, and so on, it should be noted that a specific type of the network side device 12 is not limited in the embodiment of the present invention.
Fig. 2 is a flowchart of a method for acquiring reference time information applied to the network system shown in fig. 1 according to an embodiment of the present invention. As shown in fig. 2, the method comprises the steps of:
step 201: calculating reference time information corresponding to second downlink reference time based on first downlink reference time and the second downlink reference time;
wherein the second downlink reference time is: a downlink reference time which is configured in advance, agreed by a protocol or configured by a network side and is positioned after the first reference time; the first reference time includes: and the downlink reference time corresponding to the reference time information received or calculated before the second downlink reference time.
In this embodiment, the terminal may calculate 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 as to obtain new reference time information according to reference time information received or calculated any time before the second downlink reference time, so that the terminal may perform time synchronization based on the newly obtained reference time information, thereby ensuring that time understanding of the terminal and the network side is consistent, and further reducing a possibility that the time of the terminal is deviated from the time of the network side.
For example, the terminal may perform first time synchronization in the currently operating serving cell according to reference time information sent by the network side device, and after performing the first time synchronization, the terminal may calculate new reference time information that can be used for second time synchronization according to a next downlink reference time (i.e., a second downlink reference time) after a downlink reference time (i.e., a first downlink reference time) corresponding to the reference time information; … …, and calculating new reference time information for the Nth time synchronization according to the downlink reference time corresponding to the received reference time information or the reference time information corresponding to the calculated downlink reference time of any one of 2 nd to N-1 th time, wherein N is an integer greater than or equal to 2. Of course, the downlink reference time of any one of the above 2 nd to N-1 st may be reference time information corresponding to the transmitted reference time information transmitted by the network side, and is not limited herein.
The terminal performs time synchronization according to the received reference time information sent by the network side device, which may be that the network side device sends a system message (such as SIB16) for indicating the reference time information to the terminal, and the protocol stipulates that a time position at which the terminal receives the reference time information corresponds to: a boundary (System Frame Number, SFN) of a System Frame Number where an end boundary of a System message transmission window of the System message for indicating the reference time information is located.
For example, if the time position at which the terminal receives the SIB16 (i.e., the system message) for indicating the reference time information is (SFN _2, Subframe _1), and the system message transmission window of the SIB16 is 10 subframes (Subframe) (i.e., 10 subframes in 1 SFN), the end boundary of the system message window of the SIB16 for indicating the reference time information is (SFN _3, Subframe _1), that is, the reference time information corresponds to the end boundary time of the SFN _ 3.
Or, the network side device may send the reference time information to the terminal through a unicast message (e.g., a radio resource control configuration (RRC Reconfiguration) message, etc.), where the unicast message carries a reference SFN value, and the protocol stipulates that a time position corresponding to the reference time information received by the terminal is: the SFN closest to the reception of the reference time information is the system frame end boundary of the reference SFN value.
For example, if the position where the terminal receives the reference time information is (SFN _2, subframe _1), and the reference SFN value carried in the unicast message is SFN 3, the reference time information received by the terminal corresponds to the system frame end boundary of the first future SFN 3.
The reference time information refers to absolute time information, for example, 58 minutes 25 seconds at 8 o' clock, 2/7/2020; the first downlink reference time and the second downlink reference time are any downlink reference time corresponding to different absolute time information, and the downlink reference time may include at least one of an SFN, a subframe and a Slot (Slot), that is, the first downlink reference time and the second downlink reference time both include at least one of an SFN, a subframe and a Slot (Slot).
In this embodiment, the calculating 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 may be understood as that the terminal determines a time position corresponding to a boundary of the second downlink reference time according to the first downlink reference time and the second downlink reference time, and updates the reference time information corresponding to the second downlink reference time to the determined time position. Then, the clock of the terminal may be adjusted according to the reference time information corresponding to the second downlink reference time, so as to implement time synchronization.
In some embodiments, the calculating 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 a difference between the first downlink reference time and 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 may determine a time position corresponding to the boundary of the second downlink reference time according to the difference between the first downlink reference time and the second downlink reference time, and update the reference time information corresponding to the second downlink reference time, so that the calculation complexity of the reference time information is reduced.
It should be noted that, the above calculating 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 to use a calculation formula of protocol convention, pre-configuration, or network side configuration, and calculate the time position corresponding to the boundary of the second downlink reference time by using the difference as an input quantity of the calculation formula.
Since the first downlink reference time and the second downlink reference time both include at least one of an SFN, a subframe and a slot, an example of various situations is described herein, specifically as follows;
in an example one, when the first downlink reference time and the second downlink reference time only include an SFN, that is, as shown in fig. 3, the reference time information referrencetime (1) received by the terminal for the first time in the current serving cell corresponds to a boundary of the SFN (1), if the first downlink reference time is an SFN (m), and the reference time information corresponding to the SFN (m) may be received (e.g., the SFN (1)) or obtained through calculation, the terminal may obtain a time position corresponding to a boundary of the SFN (X) in the second downlink reference time according to the following calculation formula (1), where m and X are positive integers, and X is greater than m, where:
latestReferenceTime＝
referenceTime(m)+(SFN(X)-SFN(m))·sfnGranularity (1)
here, referrencetime (m) corresponds to the boundary of sfn (m);
latestReferenceTime indicates a time position corresponding to an sfn (x) boundary;
sfnggranularity represents the time granularity for the SFN (e.g., sfnggranularity is 10ms, etc.).
Example two, when the first downlink reference time and the second downlink reference time include an SFN and a subframe (i.e., a subframe), that is, the reference time information referrence time (1) received by the terminal for the first time in the current serving cell corresponds to a boundary of the subframe (1) in the SFN (1) as shown in fig. 3, if the first downlink reference time is subframe (k) in the SFN (m), the terminal may calculate a time position corresponding to the boundary of the subframe (y) in the SFN (x) in the second downlink reference time according to the following calculation formula (2), where k and y are positive integers, where:
latestReferenceTime＝referenceTime(m)+(SFN(X)-SFN(m))·sfnGranularity+
(subframe(y)-subframe(k))·subframeGranularity (2)
here, referrenetime (m) corresponds to the boundary of subframe (k) in sfn (m);
latestReferenceTime represents a time position corresponding to a subframe (y) boundary in sfn (x);
subframe granularity represents the temporal granularity (e.g., 1ms, etc.) to which a subframe corresponds.
In a third example, when the first downlink reference time and the second downlink reference time include an SFN and a slot (i.e., a timeslot), that is, reference time information referrencetime (1) received by the terminal for the first time in the current serving cell corresponds to a boundary of the slot (1) in the SFN (1) as shown in fig. 3, if the first downlink reference time is slot (i) in SFN (m), the terminal may calculate a time position corresponding to a boundary of slot (z) in SFN (x) in the second downlink reference time according to the following calculation formula (3), where i and z are positive integers:
latestReferenceTime＝referenceTime(m)+
(SFN(X)-SFN(m))·sfnGranularity+(slot(z)-slot(i))·slotGranularity (3)
here, referrenettime (m) corresponds to the boundary of subframe (i) in sfn (m);
latestReferenceTime represents a time position corresponding to a slot (z) boundary in sfn (x);
the slot granularity represents the time granularity (e.g., 0.5ms, etc.) corresponding to the slot.
Because the value range of the SFN number is limited, the SFN at the second downlink reference time may be flipped by at least one SFN number with respect to the SFN at the first downlink reference time, and in some embodiments, the calculating the reference time information corresponding to the second downlink reference time based on the difference includes: calculating reference time information corresponding to the second downlink reference time based on the difference and the System Frame Number (SFN) turnover frequency; the SFN rollover frequency is the frequency of rollover of the SFN of the second downlink reference time compared with the SFN of the first downlink reference time, so that the time position corresponding to the boundary of the second downlink reference time can be accurately determined under the condition that the SFN of the second downlink reference time occurs relative to the SFN of the first downlink reference time, and the accuracy of the calculated reference time information is ensured.
For example, when the first downlink reference time and the second downlink reference time only include an SFN, that is, as shown in fig. 3, the reference time information referrence time (1) received by the terminal for the first time in the current serving cell corresponds to a boundary of the SFN (1), and if the first downlink reference time is SFN (m) and the SFN (x) is compared with the SFN (m) and the SFN number is inverted, the terminal may calculate a time position corresponding to the SFN (x) boundary in the second downlink reference time according to the following calculation formula (4), where:
latestReferenceTime＝referenceTime(m)+
((SFN(X)-SFN(m))+maxSFN·numOfWrap)·sfnGranularity (4)
here, referrencetime (m) corresponds to the boundary of sfn (m);
maxfsfn identifies SFN number range;
numOfWrap identifies the number of flips that SFN (x) occurs with respect to SFN (1).
In the above example, only the first downlink reference time is taken as the downlink reference time corresponding to the reference time information that the terminal receives for the first time in the current serving cell, and the first downlink reference time may be actually any downlink reference time before the second downlink reference time.
In some embodiments, the first downlink reference time may be any one of:
the terminal receives or calculates downlink reference time corresponding to the reference time information for the first time;
calculating the difference value, wherein the difference value is the downlink reference time corresponding to the reference time information received or obtained by calculation at the previous time;
a downlink reference time for a protocol agreement or network configuration.
The reference time information received by the terminal for the first time may be understood as: when the terminal accesses the target cell for the first time (for example, the connected terminal is switched to the target cell, or the idle terminal reselects the target cell), the reference time information is received from the target cell for the first time; or, the terminal receives the reference time information from the target cell when time synchronization is needed (e.g., the reference time information obtained by reading the system information, or the reference time information sent to the terminal by the network side device through a dedicated signaling after sending the reference time request information).
In addition, the second downlink reference time may be any downlink reference time after the terminal performs the first time synchronization, and specifically, 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, so that the terminal may synchronize the time more timely.
For example, each SFN includes 10 subframes with a duration of 10ms, and if the difference is calculated at a time position (i.e., 4ms) of a terminal at a boundary of a 4 th subframe of the SFN (j), where j is a positive integer greater than 1, the second downlink reference time may be SFN (j-1) or SFN (j); if the terminal calculates the difference at the time position (i.e. 7ms) of the boundary of the 7 th subframe of SFN (j), the second downlink reference time may be SFN (j +1) or SFN (j).
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, which may be performed in any scenario and is not limited herein.
In some embodiments, the calculating reference time information corresponding to the second downlink reference time based on the first downlink reference time and the second downlink reference time includes:
under the condition that the terminal meets a trigger condition, calculating reference time information corresponding to second downlink reference time based on first downlink reference time and the second downlink reference time, wherein the trigger condition comprises:
the internal clock deviation of the terminal is greater than or equal to the clock precision, for example, the internal clock deviation of the terminal is 1us after the terminal receives the reference time information for 10s, and the clock precision is 1 us; or,
the reference time precision requirement of the terminal is changed, for example, the time precision requirement of the terminal is 10us when the terminal receives the reference time information, and the time precision requirement of the current terminal is changed to 1 us; or,
receiving synchronization indication information sent by the network side, for example, the network side device sends 1bit to indicate that the UE needs to perform time synchronization again, specifically, the network side device indicates an SFN number, the terminal uses the SFN number as the second downlink reference time, and calculates reference time information corresponding to the second downlink reference time.
Here, the terminal calculates 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 trigger condition is satisfied, so that the terminal is prevented from calculating the reference time information too frequently, and the energy consumption of the terminal is reduced.
In addition, in some embodiments, the cell corresponding to the first reference time information is the same as the cell corresponding to the second reference time information, which may further ensure the accuracy of the calculated reference time information.
For example, the reference time information received by the terminal (i.e., the downlink reference time corresponding to the reference time information is the first downlink reference time) corresponds to the cell 1, and the current serving cell of the terminal still includes the cell 1, i.e., the cell corresponding to the second reference time information is the 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. Of course, if the current serving cell of the terminal (or the current primary cell PCell or the current primary and secondary cell PSCell of the UE) is changed to the cell 2, that is, the cell corresponding to the second reference time information is the cell 2, the terminal needs to report the time information request information again when the clock deviation occurs.
Fig. 4 is another method for acquiring reference time information, which is applied to the network system shown in fig. 1 according to an embodiment of the present invention. As shown in fig. 4, the method includes the steps of:
step 401: sending the demand information to the network side equipment;
step 402: and receiving target reference time information sent by the network side equipment based on the demand information.
Here, when the terminal needs to perform time synchronization again by receiving the reference time information sent by the network side device, the terminal may send the demand information to the network side device, and when the network side device receives the demand information, the network side device feeds back the target reference time information to the terminal in response to the demand information, so that the terminal timely instructs the network side device to send the reference time information according to the self demand, so that the terminal may perform time synchronization based on the newly received target reference time information, to ensure that the time understanding of the terminal and the network side is consistent, and further reduce the possibility that the time of the terminal is deviated from the time of the network side.
In this embodiment, the requirement information may be any information for instructing the network side device to transmit the target reference time information, for example, the requirement information is information for requesting the network side device to transmit the reference time information once, and the like.
In some embodiments, the requirement information may include at least one of:
a time information update period;
clock accuracy information of the terminal.
When the demand information includes the time information update period, the network side device may periodically send reference time information to the terminal according to the time information update period after receiving the demand information, so that the terminal periodically receives the reference time information sent by the network side device, and may perform time synchronization.
For example, the time information update cycle may be 10s, that is, after the network side device receives the requirement information, the network side device sends the reference time information to the network side device once at an interval of 10s, and the terminal may perform time synchronization according to the reference time information received each time.
In addition, when the requirement information includes the clock accuracy information of the terminal, the network-side device may flexibly transmit the reference time information to the terminal according to the time accuracy information of the terminal, and for example, when the clock accuracy information of the terminal is 1us, if the network-side device determines that the content clock of the terminal has an error of 1us at maximum every 10s, the network-side device may transmit the reference time information to the terminal at intervals of 10s or at intervals of less than 10 s.
Fig. 5 is a flowchart of an information transceiving method applied to the network system shown in fig. 1 according to an embodiment of the present invention. As shown in fig. 5, the information transceiving method is applied to a network side device, and the method includes the following steps:
step 501: and receiving the demand information sent by the terminal.
Step 502: and responding to the demand information, and sending target reference time information to the terminal.
Optionally, the requirement information includes at least one of the following items:
a time information update period;
clock accuracy information of the terminal.
It should be noted that, as an embodiment of the network-side device corresponding to the embodiment shown in fig. 5, a specific implementation manner of the embodiment of the present invention may refer to the relevant description of the embodiment shown in fig. 4, and may achieve the same beneficial effects, and details are not described here to avoid repeated description.
Fig. 6 is a block diagram of a terminal according to an embodiment of the present invention, and as shown in fig. 6, the terminal 600 includes:
a reference time information calculating module 601, configured to calculate, based on a first downlink reference time and a second downlink reference time, reference time information corresponding to the second downlink reference time;
wherein the second downlink reference time is: a downlink reference time which is configured in advance, agreed by a protocol or configured by a network side and is positioned after the first reference time; the first reference time includes: and the downlink reference time corresponding to the reference time information received or calculated before the second downlink reference time.
Optionally, as shown in fig. 7, the reference time information calculating module 601 includes:
a calculating unit 6011, configured to calculate a difference between the first downlink reference time and the second downlink reference time;
a reference time information calculating unit 6012, configured to calculate, based on the difference, reference time information corresponding to the second downlink reference time.
Optionally, the second downlink reference time includes a downlink reference time when the difference is calculated, or a downlink reference time closest to the downlink reference time when the difference is calculated.
Optionally, the reference time information calculating unit 6012 is specifically configured to:
calculating reference time information corresponding to the second downlink reference time based on the difference and the System Frame Number (SFN) turnover frequency;
the SFN rollover number is the number of times that the SFN of the second downlink reference time is flipped compared to the SFN of the first downlink reference time.
Optionally, the first downlink reference time is any one of:
the terminal receives or calculates downlink reference time corresponding to the reference time information for the first time;
calculating the difference value, wherein the difference value is the downlink reference time corresponding to the reference time information received or obtained by calculation at the previous time;
a downlink reference time for a protocol agreement or network configuration.
Optionally, the first downlink reference time and the second downlink reference time each include at least one of an SFN, a subframe, and a timeslot.
Optionally, the reference time information calculating module 601 is specifically configured to:
under the condition that the terminal meets a trigger condition, calculating reference time information corresponding to second downlink reference time based on first downlink reference time and the second downlink reference time, wherein the trigger condition comprises:
the internal clock deviation of the terminal is greater than or equal to the clock precision; or,
changing the reference time precision requirement of the terminal; or,
and receiving the synchronization indication information sent by the network side.
Optionally, the cell corresponding to the first reference time information is the same as the cell corresponding to the second reference time information.
It should be noted that, in the embodiment of the present invention, the terminal 600 may be a terminal in an implementation manner in the method embodiment shown in fig. 2, and any implementation manner of the terminal in the method embodiment may be implemented by the terminal 600 in the embodiment of the present invention, and the same beneficial effects are achieved, and in order to avoid repetition, details are not described here again.
Fig. 8 is a block diagram of another terminal according to an embodiment of the present invention, and as shown in fig. 8, a terminal 800 includes:
a sending module 801, configured to send demand information to a network side device;
a receiving module 802, configured to receive target reference time information sent by the network side device based on the requirement information.
Optionally, the requirement information includes at least one of the following items:
a time information update period;
clock accuracy information of the terminal.
It should be noted that, in the embodiment of the present invention, the terminal 800 may be a terminal in an implementation manner 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 implemented by the terminal 800 in the embodiment of the present invention, and the same beneficial effects are achieved, and in order to avoid repetition, details are not described here again.
Fig. 9 is a block diagram of a network-side device according to an embodiment of the present invention, and as shown in fig. 9, the network-side device 900 includes:
a receiving module 901, configured to receive requirement information sent by a terminal;
a sending module 902, configured to send, in response to the demand information, target reference time information to the terminal.
Optionally, the requirement information includes at least one of the following items:
a time information update period;
clock accuracy information of the terminal.
It should be noted that the network side device 900 in the embodiment of the present invention may be a network side device in any implementation manner in the method embodiments shown in fig. 4 and fig. 5, and any implementation manner of the network side device in the method embodiments shown in fig. 4 and fig. 5 may be implemented by the network side device 800 in the embodiment of the present invention, and the same beneficial effects are achieved, and in order to avoid repetition, details are not described here again.
Fig. 10 is a schematic diagram of a hardware structure of a terminal for implementing various embodiments of the present invention, where 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, a user input unit 1007, an interface unit 1008, a memory 1009, a processor 1010, and a power supply 1011. Those skilled in the art will appreciate that the terminal configuration shown in fig. 10 is not intended to be limiting, and that the terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.
Wherein the processor 1010 is configured to:
calculating reference time information corresponding to second downlink reference time based on first downlink reference time and the second downlink reference time;
wherein the second downlink reference time is: a downlink reference time which is configured in advance, agreed by a protocol or configured by a network side and is positioned after the first reference time; the first reference time includes: and the downlink reference time corresponding to the reference time information received or calculated before the second downlink reference time.
Optionally, the processor 1010 is further configured to:
calculating a difference between the first downlink reference time and the second downlink reference time;
and calculating reference time information corresponding to the second downlink reference time based on the difference.
Optionally, the second downlink reference time includes a downlink reference time when the difference is calculated, or a downlink reference time closest to the downlink reference time when the difference is calculated.
Optionally, the processor 1010 is further configured to:
calculating reference time information corresponding to the second downlink reference time based on the difference and the System Frame Number (SFN) turnover frequency;
the SFN rollover number is the number of times that the SFN of the second downlink reference time is flipped compared to the SFN of the first downlink reference time.
Optionally, the first downlink reference time is any one of:
the terminal receives or calculates downlink reference time corresponding to the reference time information for the first time;
calculating the difference value, wherein the difference value is the downlink reference time corresponding to the reference time information received or obtained by calculation at the previous time;
a downlink reference time for a protocol agreement or network configuration.
Optionally, the first downlink reference time and the second downlink reference time each include at least one of an SFN, a subframe, and a timeslot.
Optionally, the processor 1010 is further configured to:
under the condition that the terminal meets a trigger condition, calculating reference time information corresponding to second downlink reference time based on first downlink reference time and the second downlink reference time, wherein the trigger condition comprises:
the internal clock deviation of the terminal is greater than or equal to the clock precision; or,
changing the reference time precision requirement of the terminal; or,
and receiving the synchronization indication information sent by the network side.
Optionally, the cell corresponding to the first reference time information is the same as the cell corresponding to the second reference time information.
Alternatively, the radio frequency unit 1001 is used for
Sending the demand information to the network side equipment;
and receiving target reference time information sent by the network side equipment based on the demand information.
Optionally, the requirement information includes at least one of the following items:
a time information update period;
clock accuracy information of the terminal.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 1001 may be used for receiving and sending signals during a message transmission or a call, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 1010; in addition, the uplink data is transmitted to the base station. In general, 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. Further, the radio frequency unit 1001 may also communicate with a network and other devices through a wireless communication system.
The terminal provides the user with wireless broadband internet access through the network module 1002, such as helping the user send and receive e-mails, browse webpages, access streaming media, and the like.
The audio output unit 1003 may convert audio data received by the radio frequency unit 1001 or the network module 1002 or stored in the memory 1009 into an audio signal and output as sound. Also, the audio output unit 1003 can provide audio output (e.g., a call signal reception sound, a message reception sound, etc.) related to a specific function performed by the terminal 1000. The audio output unit 1003 includes a speaker, a buzzer, a receiver, and the like.
The input unit 1004 is used to receive an audio or video signal. The input Unit 1004 may include a Graphics Processing Unit (GPU) 10041 and a microphone 10042, the Graphics processor 10041 Processing image data of still pictures or video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 1006. The image frames processed by the graphic processor 10041 may be stored in the memory 1009 (or other storage medium) or transmitted 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 may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 1001 in case of a phone call mode.
Terminal 1000 can also include at least one sensor 1005 such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel 10061 according to the brightness of ambient light, and the proximity sensor can turn off the display panel 10061 and the backlight when the terminal 1000 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 1005 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which will not be described in detail herein.
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), or the like.
The user input unit 1007 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 1007 includes a touch panel 10071 and other input devices 10072. The touch panel 10071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 10071 (e.g., operations by a user on or near the touch panel 10071 using a finger, a stylus, or any other suitable object or attachment). The touch panel 10071 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 1010, and receives and executes commands sent by the processor 1010. In addition, the touch panel 10071 may be implemented by various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 10071, the user input unit 1007 can include other input devices 10072. Specifically, the other input devices 10072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a track ball, a mouse, and a joystick, which are not described herein again.
Further, the touch panel 10071 can be overlaid on the display panel 10071, and when the touch panel 10071 detects a touch operation thereon or nearby, the touch operation is transmitted to the processor 1010 to determine the type of the touch event, and then the processor 1010 provides a corresponding visual output on the display panel 10061 according to the type of the touch event. Although in fig. 10, the touch panel 10071 and the display panel 10061 are two independent components for implementing the input and output functions of the terminal, in some embodiments, the touch panel 10071 and the display panel 10061 may be integrated for implementing the input and output functions of the terminal, which is not limited herein.
The memory 1009 may be used to store software programs as well as various data. The memory 1009 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, and the like), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 1009 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 1010 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal and processes data by operating or executing software programs and modules stored in the memory 1009 and calling data stored in the memory 1009, thereby integrally monitoring the terminal. Processor 1010 may include one or more processing units; preferably, the processor 1010 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 1010.
Terminal 1000 can also include a power supply 1011 (e.g., a battery) for powering the various components, and preferably, power supply 1011 can be logically coupled to processor 1010 through a power management system that provides management of charging, discharging, and power consumption.
In addition, terminal 1000 can include some functional blocks not shown, which are not described herein.
Preferably, an embodiment of the present invention further provides a terminal, including a processor 1010, a memory 1009, and a computer program stored in the memory 1009 and capable of running on the processor 1010, where the computer program is executed by the processor 1010 to implement each process of the above-mentioned method for acquiring reference time information, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again.
It should be noted that, in this embodiment, the terminal 1000 may be a terminal in any implementation manner in the method embodiment of the present invention, and any implementation manner of the terminal in the method embodiment of the present invention may be implemented by the terminal 1000 in this embodiment, so as to achieve the same beneficial effects, and details are not described here again.
Fig. 11 is a structural diagram of a network-side device according to an embodiment of the present invention. As shown in fig. 11, the network-side device 1100 includes: a processor 1101, a transceiver 1102, a memory 1103, and a bus interface, wherein:
the transceiver 1102 is configured to:
receiving demand information sent by a terminal;
and responding to the demand information, and sending target reference time information to the terminal.
Optionally, the requirement information includes at least one of the following items:
a time information update period;
clock accuracy information of the terminal.
In fig. 11, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1101, and various circuits, represented by memory 1103, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1102 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different terminals, the user interface 1104 may also be an interface capable of interfacing with desired devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.
The processor 1101 is responsible for managing the bus architecture and general processing, and the memory 1103 may store data used by the processor 1101 in performing operations.
It should be noted that, in this embodiment, the network-side device 1100 may be a network-side device in 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 may be implemented by the network-side device 1100 in this embodiment, so as to achieve the same beneficial effects, and details are not described here again.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the processes of the above embodiments corresponding to the terminal or the network side, and can achieve the same technical effects, and in order to avoid repetition, the detailed description is omitted here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (27)
1. A method for acquiring reference time information is applied to a terminal, and is characterized by comprising the following steps:
calculating reference time information corresponding to second downlink reference time based on first downlink reference time and the second downlink reference time;
wherein the second downlink reference time is: a downlink reference time which is configured in advance, agreed by a protocol or configured by a network side and is positioned after the first reference time; the first reference time includes: and the downlink reference time corresponding to the reference time information received or calculated before the second downlink reference time.
2. The method of claim 1, wherein the calculating reference time information corresponding to a second downlink reference time based on a first downlink reference time and the second downlink reference time comprises:
calculating a difference between the first downlink reference time and the second downlink reference time;
and calculating reference time information corresponding to the second downlink reference time based on the difference.
3. The method of claim 2, wherein the second downlink reference time comprises a downlink reference time when the difference is calculated or a downlink reference time closest to the downlink reference time when the difference is calculated.
4. The method according to claim 2, wherein the calculating reference time information corresponding to the second downlink reference time based on the difference value comprises:
calculating reference time information corresponding to the second downlink reference time based on the difference and the System Frame Number (SFN) turnover frequency;
the SFN rollover number is the number of times that the SFN of the second downlink reference time is flipped compared to the SFN of the first downlink reference time.
5. The method of claim 1, wherein the first downlink reference time is any one of:
the terminal receives or calculates downlink reference time corresponding to the reference time information for the first time;
calculating the difference value, wherein the difference value is the downlink reference time corresponding to the reference time information received or obtained by calculation at the previous time;
a downlink reference time for a protocol agreement or network configuration.
6. The method of claim 1, wherein the first downlink reference time and the second downlink reference time each comprise at least one of an SFN, a subframe, and a slot.
7. The method of claim 1, wherein the calculating reference time information corresponding to a second downlink reference time based on a first downlink reference time and the second downlink reference time comprises:
under the condition that the terminal meets a trigger condition, calculating reference time information corresponding to second downlink reference time based on first downlink reference time and the second downlink reference time, wherein the trigger condition comprises:
the internal clock deviation of the terminal is greater than or equal to the clock precision; or,
changing the reference time precision requirement of the terminal; or,
and receiving the synchronization indication information sent by the network side.
8. The method of claim 1, wherein the cell corresponding to the first reference time information is the same as the cell corresponding to the second reference time information.
9. A method for acquiring reference time information is applied to a terminal, and is characterized by comprising the following steps:
sending the demand information to the network side equipment;
and receiving target reference time information sent by the network side equipment based on the demand information.
10. The method of claim 9, wherein the demand information comprises at least one of:
a time information update period;
clock accuracy information of the terminal.
11. An information transceiving method is applied to network side equipment, and is characterized by comprising the following steps:
receiving demand information sent by a terminal;
and responding to the demand information, and sending target reference time information to the terminal.
12. The method of claim 11, wherein the demand information comprises at least one of:
a time information update period;
clock accuracy information of the terminal.
13. A terminal, comprising:
a reference time information calculation module, configured to calculate, based on a first downlink reference time and a second downlink reference time, reference time information corresponding to the second downlink reference time;
wherein the second downlink reference time is: a downlink reference time which is configured in advance, agreed by a protocol or configured by a network side and is positioned after the first reference time; the first reference time includes: and the downlink reference time corresponding to the reference time information received or calculated before the second downlink reference time.
14. The terminal of claim 13, wherein the reference time information calculating module comprises:
a calculating unit, configured to calculate a difference between the first downlink reference time and the second downlink reference time;
and a reference time information calculation unit, configured to calculate, based on the difference, reference time information corresponding to the second downlink reference time.
15. The terminal according to claim 14, wherein the second downlink reference time comprises a downlink reference time when the difference is calculated, or a downlink reference time closest to the downlink reference time when the difference is calculated.
16. The terminal according to claim 14, wherein the reference time information calculating unit is specifically configured to:
calculating reference time information corresponding to the second downlink reference time based on the difference and the System Frame Number (SFN) turnover frequency;
the SFN rollover number is the number of times that the SFN of the second downlink reference time is flipped compared to the SFN of the first downlink reference time.
17. The terminal of claim 13, wherein the first downlink reference time is any one of:
the terminal receives or calculates the downlink reference time for the first time;
calculating the difference value, wherein the difference value is the downlink reference time corresponding to the reference time information received or obtained by calculation at the previous time;
a downlink reference time for a protocol agreement or network configuration.
18. The terminal of claim 13, wherein the first downlink reference time and the second downlink reference time each comprise at least one of an SFN, a subframe, and a slot.
19. The terminal of claim 13, wherein the reference time information calculating module is specifically configured to:
under the condition that the terminal meets a trigger condition, calculating reference time information corresponding to second downlink reference time based on first downlink reference time and the second downlink reference time, wherein the trigger condition comprises:
the internal clock deviation of the terminal is greater than or equal to the clock precision; or,
changing the reference time precision requirement of the terminal; or,
and receiving the synchronization indication information sent by the network side.
20. The terminal of claim 13, wherein the cell corresponding to the first reference time information is the same as the cell corresponding to the second reference time information.
21. A terminal, comprising:
the sending module is used for sending the demand information to the network side equipment;
and the receiving module is used for receiving the target reference time information sent by the network side equipment based on the demand information.
22. The terminal of claim 21, wherein the requirement information comprises at least one of:
a time information update period;
clock accuracy information of the terminal.
23. A network-side device, comprising:
the receiving module is used for receiving the demand information sent by the terminal;
and the sending module is used for responding to the demand information and sending target reference time information to the terminal.
24. The network-side device of claim 23, wherein the requirement information comprises at least one of:
a time information update period;
clock accuracy information of the terminal.
25. A terminal, comprising: memory, processor and computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps in the method of acquiring reference time information according to any one of claims 1 to 10.
26. A network-side device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps in the information transceiving method according to claim 11 or 12.
27. A computer-readable storage medium, characterized in that a computer program is stored thereon, which when executed by a processor implements the steps in the method of acquiring reference time information according to any one of claims 1 to 10; or, implementing the steps in the information transceiving method as recited in claim 11 or 12.
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| PCT/CN2021/075066 WO2021155806A1 (en) | 2020-02-07 | 2021-02-03 | Reference time information acquisition method, information send/receive method, and related device |
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| CN202010082997.5A CN113260038A (en) | 2020-02-07 | 2020-02-07 | Acquisition method of reference time information, information transceiving method and related equipment |
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| WO2023051620A1 (en) * | 2021-09-30 | 2023-04-06 | 华为技术有限公司 | Communication method, communication apparatus and communication system |
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| WO2023178558A1 (en) * | 2022-03-23 | 2023-09-28 | Mediatek Singapore Pte. Ltd. | Schemes for solving sfn wrapping issues in ntn |
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