Cell time-frequency offset processing method and device, terminal, chip and storage medium

Abstract

The invention provides a cell time-frequency offset processing method and device, a terminal, a chip and a storage medium. The method comprises the following steps: in response to a common-station serving cell in a plurality of serving cells connected with a terminal supporting a carrier aggregation (CA), determining a plurality of first common-station serving cells from the plurality of serving cells; determining a first target SSB from a plurality of SSBs received by the plurality of first serving cells based on a distance between a synchronization signal block (SSB) received by the first serving cell and a wake-up position; the wake-up position is a position where the terminal starts to receive downlink data in a next discontinuous reception (DRX) period; and correcting the time-frequency offset of the first service cell by using the first target SSB. According to the scheme provided by the invention, the balance between the performance and the power consumption can be realized in the process of correcting the time-frequency deviation by using the reference signal.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a method, device, terminal, chip and storage medium for processing time and frequency offset of a cell. Background Art

[0002] In the related technology, for application scenarios where carrier aggregation (CA) and discontinuous reception (DRX) related parameters are configured, after the user equipment (UE) wakes up from sleep mode, it needs to receive relevant reference signals (such as synchronization signal blocks (SSB)) for time-frequency estimation to correct the frequency deviation and timing deviation generated in sleep mode. However, how to achieve a balance between performance and power consumption in the process of correcting time-frequency deviation using reference signals is a problem that needs to be solved urgently. Summary of the invention

[0003] The present disclosure provides a method, device, terminal, chip and storage medium for processing cell time-frequency offset to solve the problems in related technologies and achieve a balance between performance and power consumption in the process of correcting time-frequency deviation using reference signals.

[0004] The first aspect of the present disclosure provides a method for processing a cell time-frequency offset, which is performed by a terminal configured with CA, and includes:

[0005] In response to the presence of a co-sited service cell among the multiple service cells to which the terminal supporting CA is connected, determining a plurality of co-sited first service cells from the multiple service cells;

[0006] Determine a first target SSB from the multiple SSBs received by the multiple first serving cells based on the distance between the SSB received by the first serving cell and the wake-up position; the wake-up position is the position where the terminal starts to receive downlink data in the next discontinuous reception DRX cycle;

[0007] The time-frequency offset of the first serving cell is corrected using the first target SSB.

[0008] In some embodiments, determining the first target SSB from the multiple SSBs received by the multiple first serving cells based on the distance between the SSB received by the first serving cell and the wake-up location includes:

[0009] Select a first target SSB having the shortest distance from the wake-up location from among the multiple SSBs received by the multiple first service cells.

[0010] In some embodiments, the method further comprises:

[0011] In response to the presence of a non-co-sited serving cell among the multiple serving cells, determining a second non-co-sited serving cell from the multiple serving cells;

[0012] The SSB received by the second service cell is used as the second target SSB, and the time-frequency offset of the second service cell is corrected using the second target SSB.

[0013] In some embodiments, the method further comprises:

[0014] A third target SSB farthest from the wake-up position is determined from the first target SSB and the second target SSB, and the terminal is started at the third target SSB position.

[0015] In some embodiments, the method further comprises:

[0016] In response to the multiple service cells being co-sited service cells, the terminal is started at the first target SSB position.

[0017] In some embodiments, the SSB received by the serving cell has a QCL relationship with the corresponding serving cell.

[0018] In some embodiments, the method further comprises:

[0019] Determine whether the frequency deviation, timing deviation, and signal to interference plus noise ratio (SINR) of each of the multiple serving cells meet preset conditions, and obtain a determination result;

[0020] When the frequency deviation, timing deviation and SINR of the service cell all meet the preset conditions, the service cell is determined to be a first service cell that is co-sited; or, when any one of the frequency deviation, timing deviation and SINR of the service cell does not meet the preset conditions, the service cell is determined to be a second service cell that is not co-sited.

[0021] In some embodiments, the preset conditions include:

[0022] The SINR of the serving cell is greater than a first preset threshold;

[0023] The difference between the frequency deviation of the serving cell and the frequency deviation mean is less than a second preset threshold;

[0024] The difference between the timing deviation of the serving cell and the mean timing deviation is less than a third preset threshold value; wherein,

[0025] The frequency deviation mean is the mean of the frequency deviations of the multiple serving cells, and the timing deviation mean is the mean of the timing deviations of the multiple serving cells.

[0026] The second aspect of the present disclosure provides a cell time-frequency offset processing device, the device comprising:

[0027] a responding unit, configured to, in response to the existence of a co-sited serving cell among a plurality of serving cells to which a terminal supporting CA is connected, determine a plurality of co-sited first serving cells from the plurality of serving cells;

[0028] a determining unit, configured to determine a first target SSB from a plurality of SSBs received by the plurality of first serving cells based on the SSB received by the first serving cell; the wake-up position being a position at which the terminal starts to receive downlink data in a next DRX cycle;

[0029] A processing unit is used to correct the time-frequency offset of the first serving cell using the first target SSB.

[0030] The third aspect embodiment of the present disclosure proposes a terminal, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method described in the first aspect embodiment of the present disclosure.

[0031] The fourth aspect embodiment of the present disclosure proposes a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable a computer to execute the method described in the first aspect embodiment of the present disclosure.

[0032] The fifth aspect embodiment of the present disclosure proposes a chip, which includes one or more interface circuits and one or more processors; the interface circuit is used to receive signals from the memory of the terminal and send signals to the processor, the signals include computer instructions stored in the memory, and when the processor executes the computer instructions, the terminal executes the method described in the first aspect embodiment of the present disclosure.

[0033] In summary, the cell time-frequency offset processing method, device, terminal, chip and storage medium proposed in the present invention, in response to the existence of a co-sited service cell among multiple service cells connected to a terminal supporting CA, determine multiple co-sited first service cells from the multiple service cells; based on the distance between the SSB received by the first service cell and the wake-up position, determine a first target SSB from the multiple SSBs received by the multiple first service cells; the wake-up position is the position where the terminal starts to receive downlink data in the next DRX cycle; and use the first target SSB to correct the time-frequency offset of the first service cell. The solution proposed in the present disclosure selects a target SSB from the SSBs received by the co-station service cell to correct the time-frequency offset of the co-station service cell according to the distance between the SSB received by the co-station service cell and the position where the terminal starts to receive downlink data in the next DRX cycle. Since the position of the farthest SSB is no longer selected as the wake-up point, the time the terminal is in the wake-up state is shortened and the power consumption of the terminal is reduced. At the same time, since the frequency deviations of the co-station service cells are close, using the same SSB to correct the time-frequency offsets of different service cells will not affect the correction accuracy, thereby achieving a balance between performance and power consumption.

[0034] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the description are used to explain the principles of the present disclosure, and do not constitute improper limitations on the present disclosure.

[0036] Figure 1 A schematic diagram of a DRX sleep wake-up method in the related art;

[0037] Figure 2 A schematic diagram of a flow chart of a time-frequency offset processing method provided in an embodiment of the present disclosure;

[0038] Figure 3 A schematic diagram of a flow chart of another method for processing time-frequency offset provided by an embodiment of the present disclosure;

[0039] Figure 4 A schematic diagram of a DRX sleep wake-up pre-synchronization method in a CA scenario provided by an application embodiment of the present disclosure;

[0040] Figure 5 A schematic diagram of another DRX sleep wake-up pre-synchronization method in a CA scenario provided by an application embodiment of the present disclosure;

[0041] Figure 6 A schematic diagram of the structure of a time-frequency offset processing device provided in an embodiment of the present disclosure;

[0042] Figure 7 A schematic diagram of the structure of an electronic device provided by an embodiment of the present disclosure;

[0043] Figure 8 A schematic diagram of the structure of a chip provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0044] Embodiments of the present disclosure are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be construed as limiting the present disclosure.

[0045] For application scenarios where CA and DRX related parameters are configured in connected mode, such as New Radio (NR) standard application scenarios and Long Term Evolution (LTE) standard application scenarios, the UE needs to periodically turn on the receiver and start to continuously listen to downlink data for a period of time thereafter, which is called the duration (OnDuration); the DRX cycle is used to describe the interval between two On Durations in the DRX state. Each DRX cycle is divided into an active period and an inactive period (i.e., a dormant period) according to the UE behavior, and the active period includes the On Duration; after entering the DRX inactive period, the UE will enter the sleep mode to reduce power consumption, and in the sleep mode, the UE power consumption is often reduced by turning off the fast clock or reducing the voltage of the fast clock. Since turning off the fast clock or reducing the voltage of the fast clock will cause a large frequency deviation and timing deviation, in extreme cases, the frequency deviation and timing deviation may even exceed the measured frequency and timing ranges. Therefore, when the UE wakes up from the sleep state, it is necessary to receive relevant reference signals for time-frequency estimation to eliminate and suppress this frequency deviation and timing deviation.

[0046] In the related art, each CA service cell can select an SSB that is in a quasi co-location (QCL) relationship with itself as a reference signal for time-frequency estimation. Since the positions of the SSBs received by each CA service cell are different, in order to ensure that the UE can receive the SSBs of each service cell when waking up, it is necessary to select the position of the reference signal farthest from the wake-up position from the SSBs received by each service cell as the wake-up point for waking up the UE; for example, Figure 1As shown, for the three service cells PCELL, SCELL1 and SCELL2, the activation period and the inactivation period before and after the sleep time constitute a DRX cycle. The right side of the inactivation period is the next DRX cycle. The SSB received by SCELL2 is farthest from the On Duration position of the next DRX cycle. Waking up the UE here can ensure that all service cells receive the SSB. Therefore, the location of the SSB received by SCELL2 is selected as the wake-up point. However, the use of the time-frequency offset processing method in the related art will cause the UE to wake up for a long time during the inactivation period, thereby increasing the UE power consumption.

[0047] In order to solve the problems existing in the related art, the present disclosure proposes a time-frequency offset processing method, device, terminal, chip and storage medium. According to the distance between the SSB received by the co-station service cell and the position where the terminal starts to receive downlink data in the next DRX cycle, the target SSB is selected from the SSB received by the co-station service cell to correct the time-frequency offset of the co-station service cell. Since the position of the farthest SSB is no longer selected as the wake-up point, the time the terminal is in the wake-up state is shortened and the power consumption of the terminal is reduced. At the same time, since the frequency deviations of the co-station service cells are close, using the same SSB to correct the time-frequency offsets of different service cells will not affect the correction accuracy, thereby achieving a balance between performance and power consumption.

[0048] Figure 2 A time-frequency offset processing method is provided in an embodiment of the present disclosure. Figure 2 As shown, the method includes:

[0049] Step 201: In response to the presence of a co-sited service cell among a plurality of service cells to which a terminal supporting CA is connected, a plurality of co-sited first service cells are determined from the plurality of service cells.

[0050] In some embodiments, co-site may mean that two network devices share the room and transmission resources of a base station.

[0051] In some embodiments, it may also be determined first whether there is a co-sited service cell among the multiple service cells to which the terminal is connected.

[0052] In some embodiments, when there are two service cells that share a machine room and transmission resources of a base station, the two service cells may be determined to be co-located service cells.

[0053] In some embodiments, it can be determined whether the frequency deviation, timing deviation and SINR of each of the multiple service cells meet the preset conditions; when the frequency deviation, timing deviation and SINR of the service cell all meet the preset conditions, the service cell is determined to be a first service cell that is co-sited; or, when any of the frequency deviation, timing deviation and SINR of the service cell does not meet the preset conditions, the service cell is determined to be a second service cell that is not co-sited.

[0054] In some embodiments, the terminal may also be referred to as a UE, which is not limited in the embodiments of the present disclosure.

[0055] Step 202: Based on the distance between the SSB received by the first service cell and the wake-up position, determine a first target SSB from the multiple SSBs received by the multiple first service cells; the wake-up position is the position where the terminal starts to receive downlink data in the next DRX cycle.

[0056] In some embodiments, a first target SSB having the smallest distance to the wake-up location may be selected from a plurality of SSBs received by the plurality of first serving cells.

[0057] In some embodiments, the SSB received by the first serving cell may be an SSB having a QCL relationship with the first serving cell. The SSB received by the first serving cell may also be referred to as a reference signal of the first serving cell, which is not limited in the embodiments of the present disclosure.

[0058] In some embodiments, the position of the corresponding SSB can be determined based on the configuration information of the SSB in the QCL configuration information of each service cell, thereby determining the distance of the SSB from the wake-up position.

[0059] In actual application, the wake-up of the terminal may include two dimensions: timed wake-up and burst wake-up. For the timed wake-up dimension, the wake-up position may be the start position of the On Duration pre-configured in the DRX cycle; for the burst wake-up dimension, that is, when the On Duration position is not reached, a wake-up instruction issued by the network is received. At this time, the wake-up position may be the position issued by the network, specifically, the position carried in the wake-up instruction.

[0060] Step 203: Use the first target SSB to correct the time-frequency offset of the first serving cell.

[0061] In some embodiments, when there are co-located first service cells, the number of the first service cells is at least two, and after determining the first target SSB, the first target SSB can be used to correct the time-frequency offset of each first service cell.

[0062] In some embodiments, the first target SSB can be used to perform time domain and frequency domain estimation on each first service cell of the co-site, thereby suppressing and eliminating the frequency deviation and timing deviation generated by the terminal in sleep mode.

[0063] In summary, the solution proposed in the embodiment of the present disclosure selects a target SSB from the SSBs received by the co-station service cell to correct the time-frequency offset of the co-station service cell according to the distance between the SSB received by the co-station service cell and the position where the terminal starts to receive downlink data in the next DRX cycle. Since the position of the farthest SSB is no longer selected as the wake-up point, the time the terminal is in the wake-up state is shortened and the power consumption of the terminal is reduced. At the same time, since the frequency deviations of the co-station service cells are close, using the same SSB to correct the time-frequency offsets of different service cells will not affect the correction accuracy, thereby achieving a balance between performance and power consumption.

[0064] Figure 3 Another time-frequency offset processing method provided in an embodiment of the present disclosure is executed by a terminal configured with CA. Figure 3 As shown, the method may include:

[0065] Step 301: In response to the presence of a co-sited service cell among a plurality of service cells to which a terminal supporting CA is connected, a plurality of co-sited first service cells are determined from the plurality of service cells.

[0066] In some embodiments, it may also be determined first whether there is a co-sited service cell among the multiple service cells to which the terminal is connected.

[0067] Based on this, the method may further include:

[0068] Step 300: Determine whether there is a co-sited service cell among multiple service cells to which the terminal supporting CA is connected.

[0069] In some embodiments, when there are two service cells that share a machine room and transmission resources of a base station, the two service cells may be determined to be co-located service cells.

[0070] In actual application, since the distance between the co-sited service cell base station and the terminal is basically the same, the timing deviations of these service cells can be considered to be roughly the same after excluding the influence of beams and multipaths, and the frequency deviations are also roughly the same; therefore, the frequency deviation, timing deviation and signal and SINR of the service cell can be used to determine whether the service cell is co-sited.

[0071] Based on this, in some embodiments, the method may further include:

[0072] Determine whether the frequency deviation, timing deviation, and SINR of each of the multiple serving cells meet preset conditions, and obtain a first determination result;

[0073] When the first judgment result indicates that the frequency deviation, timing deviation and SINR of the service cell all meet the preset conditions, the service cell is determined to be a first service cell that is co-sited; or, when any one of the frequency deviation, timing deviation and SINR of the service cell does not meet the preset conditions, the service cell is determined to be a second service cell that is not co-sited.

[0074] In some embodiments, the preset conditions may include:

[0075] The SINR of the serving cell is greater than a first preset threshold;

[0076] The difference between the frequency deviation of the serving cell and the frequency deviation mean is less than a second preset threshold;

[0077] The difference between the timing deviation of the serving cell and the mean timing deviation is less than a third preset threshold value; wherein,

[0078] The frequency deviation mean is the mean of the frequency deviations of the multiple serving cells, and the timing deviation mean is the mean of the timing deviations of the multiple serving cells.

[0079] In some embodiments, frequency deviation, timing deviation, SINR and other related information of each CA service cell during the activation period of DRX (Connected mode DRX, CDRX) in connected state can be collected to determine whether each service cell is co-located in the next CDRX cycle.

[0080] In some embodiments, when the service cell satisfies the above three preset conditions at the same time, that is, the SINR of the service cell is greater than the first preset threshold value, and the difference between the frequency deviation of the service cell and the frequency deviation mean is less than the second preset threshold value, and the difference between the timing deviation of the service cell and the timing deviation mean is less than the third preset threshold value, the service cell can be determined as a co-sited first service cell; accordingly, when the service cell does not satisfy any one of the above three preset conditions, the service cell can be determined as a non-co-sited second service cell.

[0081] In some embodiments, it may be determined whether the SINR of the serving cell meets the preset conditions. When the SINR of the serving cell meets the preset conditions, it may be determined whether the SINR of the serving cell is greater than a first preset threshold value. When the SINR of the serving cell is greater than the first preset threshold value, it indicates that the time-frequency estimation of the serving cell is reliable and the SINR of the serving cell meets the preset conditions. At this time, the serving cell whose SINR meets the preset conditions may be placed in the first set.

[0082] Then, it can be determined whether the frequency deviation and timing deviation of each service cell in the first set meet the preset conditions; specifically, the frequency deviation mean and timing deviation mean of each service cell in the first set are first determined, wherein, when multiple service cells all meet the condition that the frequency deviation is close to the frequency deviation mean, and the timing deviation is close to the timing deviation mean, that is, the time-frequency offsets of multiple service cells are less different from the offset mean of the first set, it can be determined that these service cells are multiple service cells with close time-frequency offsets, that is, co-stationed service cells; therefore, the frequency deviation and frequency deviation of each service cell in the first set can be calculated one by one. The frequency difference between the deviation means, and the timing difference between the timing deviation of each service cell and the timing deviation mean, when the frequency difference is less than the second preset threshold and the timing difference is less than the third preset threshold, it indicates that the difference between the time-frequency offset of the service cell and the mean of the first set offsets is small, and the service cell is a co-site service cell; correspondingly, when the frequency difference is not less than the second preset threshold, or the timing difference is not less than the third preset threshold, it indicates that the difference between the time-frequency offset of the service cell and the mean of the first set offsets is large, and the service cell is not a co-site service cell, that is, the service cell is a non-co-site service cell.

[0083] Exemplarily, statistics are collected on the frequency deviation FO, timing deviation TO and SINR of each serving cell of PCELL and SCELL during the CDRX activation period, and thresholds TH1, TH2 and TH3 are set;

[0084] Determine whether the SINR of each serving cell meets the threshold TH1 one by one, that is, whether SINR_i>TH1 is satisfied; wherein SINR_i is the SINR corresponding to the serving cell cell_i;

[0085] For a serving cell that meets SINR_i>TH1, the time-frequency estimation of the cell is considered reliable and the cell is placed in cell_group1; otherwise, it is placed in cell_group2;

[0086] Calculate the FO mean FO_AVE and TO mean TO_AVE of all service cells in cell_group1;

[0087] The difference FO_diff_i between each serving cell FO and FO_AVE in cell_group1 and the difference TO_diff_i between each serving cell TO and TO_AVE in cell_group1 are calculated one by one, and the absolute value of the difference is taken; specifically, it can be expressed by the following formula:

[0088] FO_diff_i=|F0_i-FO_AVE|;

[0089] TO_diff_i=|T0_i-FO_AVE|;

[0090] Determine one by one whether each service cell in cell_group1 is co-located; the judgment rule can be expressed by the following formula:

[0091] (FO_diff_i <TH2)&&(TO_diff_i<TH3);

[0092] If it is satisfied, that is, FO_diff_i is less than TH2 and TO_diff_i is less than TH3, the cell is considered to be co-sited and is placed in cell_group1_share; otherwise, the cell is considered not to be co-sited and is placed in cell_group1_unshare.

[0093] In actual application, the first preset threshold value, the second preset threshold value and the third preset threshold value may be determined according to network configuration, or may be calculated by the terminal according to a calculation strategy jointly negotiated by the terminal and the base station.

[0094] Step 302: Determine a first target SSB from the multiple first service cells based on the distance between the SSB received by the first service cell and the wake-up position; the wake-up position is the position where the terminal starts to receive downlink data in the next DRX cycle.

[0095] In actual applications, the closer the terminal startup position is to the wake-up position in the next DRX cycle, the shorter the time the terminal is in the active state and the lower the terminal energy consumption.

[0096] Based on this, in some embodiments, a first target SSB having the shortest distance to the wake-up position may be selected from a plurality of SSBs received by the plurality of first serving cells.

[0097] In some embodiments, the SSB received by the first serving cell may be an SSB having a QCL relationship with the first serving cell. The SSB received by the first serving cell may also be referred to as a reference signal of the first serving cell, which is not limited in the embodiments of the present disclosure.

[0098] In some embodiments, the position of the corresponding SSB can be determined based on the configuration information of the SSB in the QCL configuration information of each service cell, thereby determining the distance of the SSB from the wake-up position.

[0099] In actual application, the wake-up of the terminal may include two dimensions: timed wake-up and burst wake-up. For the timed wake-up dimension, the wake-up position may be the start position of the On Duration pre-configured in the DRX cycle; for the burst wake-up dimension, that is, when the On Duration position is not reached, a wake-up instruction issued by the network is received. At this time, the wake-up position may be the position issued by the network, specifically, the position carried in the wake-up instruction.

[0100] Step 303: Use the first target SSB to correct the time-frequency offset of the first serving cell.

[0101] In some embodiments, when there are co-located first service cells, the number of the first service cells is at least two, and after determining the first target SSB, the first target SSB can be used to correct the time-frequency offset of each first service cell.

[0102] In actual application, CA application scenarios may include the following:

[0103]

[0104] Among them, RRH stands for Remote Radio Head. In the scenario of co-site CA as shown in Table 1, since the distances between the base stations of each service cell and the UE are basically the same, their timing deviations can be considered to be roughly the same after excluding the influence of beams and multipaths. At the same time, the frequency deviations of different service cells in co-site CA can generally be considered to be roughly the same.

[0105] Here, since the frequency deviations of the co-stationed service cells are close, using the same SSB to correct the time and frequency offsets of different service cells will not affect the correction accuracy, thereby ensuring that when the SSB closest to the wake-up position among the SSBs received by the co-stationed service cells is selected to correct the time and frequency offsets of each service cell in the co-stationed CA, the terminal can be kept in the wake-up state for a shorter period of time without affecting the correction performance, thereby reducing the power consumption of the terminal and achieving a balance between performance and power consumption.

[0106] Step 304: In response to the presence of a non-co-sited serving cell among the multiple serving cells, determine a second non-co-sited serving cell from the multiple serving cells.

[0107] In some embodiments, in the case where there are non-co-sited second serving cells, the number of the second serving cells is at least one, that is, at least one non-co-sited second serving cell is determined from the multiple serving cells.

[0108] In some embodiments, when determining whether there is a non-co-site service cell among the multiple service cells connected to the terminal, the service cell among the multiple service cells connected to the terminal that does not meet the preset conditions is the non-co-site service cell, that is, the second service cell.

[0109] Step 305: Use the SSB received by the second service cell as a second target SSB, and use the second target SSB to correct the time-frequency offset of the second service cell.

[0110] In some embodiments, for each second service cell in the at least one second service cell, the time-frequency offset of the second service cell can be corrected using the corresponding second target SSB.

[0111] In actual application, the second service cell that is not co-sited does not have a time-frequency deviation close to that of the co-sited CA. Therefore, in order to ensure the accuracy of the time-frequency estimation results, for the second service cell, the reference signal (i.e., SSB) received by the second service cell can be used to perform time-frequency estimation on the second service cell to correct the frequency deviation and timing deviation of the second service cell.

[0112] In some embodiments, the SSB received by the second serving cell may be an SSB associated with the second serving cell. Specifically, the SSB received by the second serving cell may have a QCL relationship with the corresponding second serving cell. The SSB received by the second serving cell may also be referred to as a reference signal of the second serving cell, which is not limited in the embodiments of the present disclosure.

[0113] It should be noted that steps 301 to 303 are time-frequency estimation steps for the co-sited first service cell, and steps 304 to 305 are time-frequency estimation steps for the non-co-sited second service cell. The time-frequency estimation step for the first service cell may be performed before the time-frequency estimation step for the second service cell, or after the time-frequency estimation step for the second service cell, or simultaneously with the time-frequency estimation step for the second service cell, which is not limited in the embodiments of the present disclosure.

[0114] In actual application, the terminal and the serving cell can be divided into three connection states:

[0115] First, all serving cells connected to the terminal are second serving cells;

[0116] The second type is that all the serving cells connected to the terminal are the first serving cells;

[0117] In a third case, all service cells connected to the terminal include the first service cell and the second service cell.

[0118] For the first connection state, the method of steps 304 to 305 can be used to perform time-frequency estimation on the corresponding second service cell using the SSB received by each second service cell.

[0119] For the second connection state, the method from step 301 to step 303 may be used to perform time-frequency estimation on each first serving cell.

[0120] For the third connection state, the method of steps 301 to 303 may be used to perform time-frequency estimation on each first serving cell, and the method of steps 304 to 305 may be used to perform time-frequency estimation on the second serving cell.

[0121] In actual application, the location of the reference signal used for time-frequency estimation may be referred to as the wake-up moment of the terminal, or may be referred to as the wake-up point of the terminal.

[0122] For the first case, each serving cell can perform its own time-frequency estimation based on the reference signal received by each serving cell. At this time, the position of the reference signal farthest from the next DRX cycle On Duration can be selected as the wake-up point for waking up the terminal, that is, the wake-up time of the terminal. For example, Figure 1 As shown, the three service cells PCELL, SCELL1 and SCELL2 are not co-located, and the SSB corresponding to SCELL2 is the farthest from the On Duration of the next DRX. At this time, in order to ensure that the three service cells can receive the corresponding SSB, the location of the SSB corresponding to SCELL2 can be selected as the wake-up point for waking up the terminal.

[0123] For the second case, since all the service cells connected to the terminal are co-located, it is only necessary to ensure that the terminal can receive the SSB corresponding to any service cell when it wakes up; at this time, in order to ensure the lowest power consumption, the SSB closest to the wake-up position among the SSBs received by all service cells can be selected, and the position of the SSB closest to the wake-up position can be used as the wake-up point.

[0124] Based on this, in some embodiments, the method may further include:

[0125] In response to all of the multiple service cells being co-sited service cells, the terminal is started at the first target SSB position.

[0126] For example, Figure 4As shown in the figure, the three service cells PCELL, SCELL1 and SCELL2 are all co-located, among which the SSB corresponding to PCELL is closest to the On Duration. The terminal can be woken up at the SSB position corresponding to PCELL and the SSB can be obtained to perform time-frequency estimation for PCELL, SCELL1 and SCELL2. Figure 4 It can be seen that compared with the wake-up time point determined by the relevant technology (i.e. Figure 4 The original wake-up time in ), the wake-up point determined by the embodiment of the present disclosure (i.e. Figure 4 The wake-up moment in the DRX cycle) is shortened to the activation period of the next DRX cycle, thereby reducing the power consumption of the terminal and achieving a balance between performance and power consumption while ensuring the time-frequency estimation performance.

[0127] For the third case, since the reference signal determined according to the co-sited first service cell is the first target SSB, and the reference signal determined according to the non-co-sited second service cell is the second target SSB, the positions of the first target SSB and the second target SSB may be different. Therefore, in order to reduce power consumption while ensuring that the first target SSB and the second target SSB can be received when the terminal wakes up, the one of the first target SSB position and the second target SSB position that is farther away from the wake-up position can be selected as the wake-up point of the terminal.

[0128] Based on this, in some embodiments, the method may further include:

[0129] A third target SSB farthest from the wake-up position is determined from the first target SSB and the second target SSB, and the terminal is started at the third target SSB position.

[0130] In some embodiments, the position of the corresponding SSB can be determined based on the configuration information of the SSB in the QCL configuration information of each service cell, thereby determining the distance between the SSB and the wake-up position.

[0131] For example, Figure 5 As shown, PCELL and SCELL2 are co-located, where the SSB corresponding to PCELL is closest to the On Duration. The terminal can be awakened at the SSB position corresponding to PCELL and the SSB can be obtained to perform time-frequency estimation for PCELL and SCELL2. SCELL1 is not co-located, so the terminal can be awakened at the SSB position corresponding to SCELL1 and the SSB can be obtained to perform time-frequency estimation for SCELL1. In order to ensure that the SSBs of PCELL and SCELL1 can be received at the same time, the SSB that is farther from the On Duration of the next DRX cycle, that is, the SSB of SCELL1, can be selected as the wake-up point. Figure 5It can be seen that compared with the wake-up time point determined by the relevant technology (i.e. Figure 5 The original wake-up time in ), the wake-up point determined by the embodiment of the present disclosure (i.e. Figure 5 The wake-up moment in the DRX cycle) is shortened to the activation period of the next DRX cycle, thereby reducing the power consumption of the terminal and achieving a balance between performance and power consumption while ensuring the time-frequency estimation performance.

[0132] In summary, the solution proposed in the embodiment of the present disclosure selects a target SSB from the SSBs received by the co-station service cell to correct the time-frequency offset of the co-station service cell according to the distance between the SSB received by the co-station service cell and the position where the terminal starts to receive downlink data in the next DRX cycle. Since the position of the farthest SSB is no longer selected as the wake-up point, the time the terminal is in the wake-up state is shortened and the power consumption of the terminal is reduced. At the same time, since the frequency deviations of the co-station service cells are close, using the same SSB to correct the time-frequency offsets of different service cells will not affect the correction accuracy, thereby achieving a balance between performance and power consumption.

[0133] The technical solution of the present disclosure is further described in detail below in conjunction with specific application examples.

[0134] The application embodiment of the present disclosure provides a DRX sleep wake-up pre-synchronization method in a CA scenario, and the method may include:

[0135] Step S11: collect statistics on the frequency deviation FO, timing deviation TO and SINR of PCELL, SCELL1 and SCELL2 during the CDRX activation period, and set thresholds TH1, TH2 and TH3.

[0136] Step S12: Determine one by one whether the SINR of each serving cell meets the threshold TH1, that is, whether SINR_i>TH1 is satisfied; wherein SINR_i is the SINR corresponding to the serving cell cell_i;

[0137] For a serving cell that satisfies SINR_i>TH1, the time-frequency estimation of the cell is considered reliable and the cell is placed in cell_group1; otherwise, the cell is placed in cell_group2.

[0138] Step S13: Calculate the FO average FO_AVE and the TO average TO_AVE of all service cells in cell_group1.

[0139] Step S14: Calculate the difference FO_diff_i between each serving cell FO and FO_AVE in cell_group1, and the difference TO_diff_i between each serving cell TO and TO_AVE in cell_group1, and take the absolute value of the difference; specifically, it can be expressed by the following formula:

[0140] FO_diff_i=|F0_i-FO_AVE|;

[0141] TO_diff_i=|T0_i-FO_AVE|.

[0142] Step S15: Determine one by one whether each serving cell in cell_group1 is co-located; the determination rule can be expressed by the following formula:

[0143] (FO_diff_i <TH2)&&(TO_diff_i<TH3);

[0144] If it is satisfied, that is, FO_diff_i is less than TH2 and TO_diff_i is less than TH3, the cell is considered to be co-sited and is placed in cell_group1_share; otherwise, the cell is considered not to be co-sited and is placed in cell_group1_unshare.

[0145] Step S16: PCELL, SCELL1 and SCELL2 all belong to cell_group1_share. The reference signal closest to the OnDuration or wake-up position among the reference signals of PCELL, SCELL1 and SCELL2 is selected to perform time-frequency estimation on PCELL, SCELL1 and SCELL2.

[0146] Specifically, Figure 4 As shown, the SSB corresponding to PCELL is closest to the On Duration. The terminal can be woken up at the SSB position corresponding to PCELL, and the SSB can be obtained to perform time-frequency estimation on PCELL, SCELL1, and SCELL2.

[0147] The application embodiment of the present disclosure provides another DRX sleep wake-up pre-synchronization method in a CA scenario, which may include:

[0148] Step S21: collect statistics on the frequency deviation FO, timing deviation TO and SINR of PCELL, SCELL1 and SCELL2 during the CDRX activation period, and set thresholds TH1, TH2 and TH3.

[0149] Step S22: Determine one by one whether the SINR of each serving cell meets the threshold TH1, that is, whether SINR_i>TH1 is satisfied; wherein SINR_i is the SINR corresponding to the serving cell cell_i;

[0150] For a serving cell that satisfies SINR_i>TH1, the time-frequency estimation of the cell is considered reliable and the cell is placed in cell_group1; otherwise, the cell is placed in cell_group2.

[0151] Step S23: Calculate the FO average FO_AVE and the TO average TO_AVE of all service cells in cell_group1.

[0152] Step S24: Calculate the difference FO_diff_i between each serving cell FO and FO_AVE in cell_group1, and the difference TO_diff_i between each serving cell TO and TO_AVE in cell_group1, and take the absolute value of the difference; specifically, it can be expressed by the following formula:

[0153] FO_diff_i=|F0_i-FO_AVE|;

[0154] TO_diff_i=|T0_i-FO_AVE|.

[0155] Step S25: Determine one by one whether each serving cell in cell_group1 is co-located; the determination rule can be expressed by the following formula:

[0156] (FO_diff_i <TH2)&&(TO_diff_i<TH3);

[0157] If it is satisfied, that is, FO_diff_i is less than TH2 and TO_diff_i is less than TH3, the cell is considered to be co-sited and is placed in cell_group1_share; otherwise, the cell is considered not to be co-sited and is placed in cell_group1_unshare.

[0158] Step S26: PCELL and SCELL2 belong to cell_group1_share, SCELL1 does not belong to cell_group1_share, select the reference signal closest to OnDuration or wake-up position among the reference signals in a QCL relationship with PCELL and SCELL2 to perform time-frequency estimation on PCELL and SCELL2, and select the reference signal in a QCL relationship with SCELL1 to perform time-frequency estimation on SCELL1.

[0159] Specifically, Figure 5As shown, the two service cells PCELL and SCELL2 are co-located, wherein the SSB corresponding to PCELL is closest to the On Duration. The terminal can be awakened at the SSB position corresponding to PCELL, and the SSB can be obtained to perform time-frequency estimation on PCELL and SCELL2. SCELL1 is not co-located, therefore, the terminal can be awakened at the SSB position corresponding to SCELL1, and the SSB can be obtained to perform time-frequency estimation on SCELL1. In order to ensure that the SSBs of PCELL and SCELL1 can be received at the same time, the SSB that is farther from the On Duration of the next DRX cycle, that is, the SSB of SCELL1, can be selected as the wake-up point.

[0160] In summary, the solution provided by the application embodiment of the present disclosure screens the co-stationed service cells and selects the SSB received by the co-stationed service cells that is closest to the wake-up position to correct the time and frequency offset of each service cell in the co-stationed CA, thereby shortening the time length of the terminal in the wake-up state and reducing the power consumption of the terminal. At the same time, since the frequency deviations of the co-stationed service cells are close, using the same SSB to correct the time and frequency offsets of different service cells will not affect the correction accuracy, thereby achieving a balance between performance and power consumption.

[0161] Figure 6 FIG. 6 is a schematic diagram of a cell time-frequency offset processing device 600 provided in an embodiment of the present disclosure. Figure 6 As shown, the device comprises:

[0162] A responding unit 601 is configured to, in response to the existence of a co-sited serving cell among a plurality of serving cells to which a terminal supporting CA is connected, determine a plurality of first co-sited serving cells from the plurality of serving cells;

[0163] A determining unit 602 is configured to determine a first target SSB from the multiple SSBs received by the multiple first serving cells based on a distance between the SSB received by the first serving cell and a wake-up position; the wake-up position is a position where the terminal starts to receive downlink data in the next DRX cycle;

[0164] The processing unit 603 is used to correct the time-frequency offset of the first serving cell using the first target SSB.

[0165] In some embodiments, the determining unit 602 may be specifically configured to:

[0166] Select a first target SSB having the shortest distance from the wake-up location from among the multiple SSBs received by the multiple first service cells.

[0167] In some embodiments,

[0168] The responding unit 601 may also be configured to, in response to the presence of a non-co-sited serving cell among the multiple serving cells, determine a non-co-sited second serving cell from the multiple serving cells;

[0169] The processing unit 603 may also be configured to use the SSB received by the second serving cell as a second target SSB, and use the second target SSB to correct the time-frequency offset of the second serving cell.

[0170] In some embodiments, the determining unit 602 may also be used to:

[0171] A third target SSB farthest from the wake-up position is determined from the first target SSB and the second target SSB, and the terminal is started at the third target SSB position.

[0172] In some embodiments, the response unit may also be used to:

[0173] In response to the multiple service cells being co-sited service cells, the terminal is started at the first target SSB position.

[0174] In some embodiments, the SSB received by the serving cell has a quasi co-located QCL relationship with the corresponding serving cell.

[0175] In some embodiments, the processing unit 603 may also be used to:

[0176] Determine whether the frequency deviation, timing deviation, and signal to interference plus noise ratio SINR of each of the multiple serving cells meet preset conditions;

[0177] When the frequency deviation, timing deviation and SINR of the service cell all meet the preset conditions, the service cell is determined to be a first service cell that is co-sited; or, when any one of the frequency deviation, timing deviation and SINR of the service cell does not meet the preset conditions, the service cell is determined to be a second service cell that is not co-sited.

[0178] In some embodiments, the preset conditions may include:

[0179] The SINR of the serving cell is greater than a first preset threshold;

[0180] The difference between the frequency deviation of the serving cell and the frequency deviation mean is less than a second preset threshold;

[0181] The difference between the timing deviation of the serving cell and the mean timing deviation is less than a third preset threshold value; wherein,

[0182] The frequency deviation mean is the mean of the frequency deviations of the multiple serving cells, and the timing deviation mean is the mean of the timing deviations of the multiple serving cells.

[0183] Figure 7 1 is a block diagram of a terminal 700 for implementing the above-mentioned cell time frequency offset processing method according to an exemplary embodiment. For example, the terminal 700 may be a mobile phone, a computer, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0184] Reference Figure 7 The terminal 700 may include one or more of the following components: a processing component 702 , a memory 704 , a power component 706 , a multimedia component 708 , an audio component 710 , an input / output (I / O) interface 712 , a sensor component 714 , and a communication component 716 .

[0185] The processing component 702 generally controls the overall operation of the terminal 700, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 702 may include one or more processors 720 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 702 may include one or more modules to facilitate the interaction between the processing component 702 and other components. For example, the processing component 702 may include a multimedia module to facilitate the interaction between the multimedia component 708 and the processing component 702.

[0186] The memory 704 is configured to store various types of data to support operations at the terminal 700. Examples of such data include instructions for any application or method operating on the terminal 700, contact data, phone book data, messages, pictures, videos, etc. The memory 704 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as a static random access memory (SRAM), an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a programmable read-only memory (PROM), a read-only memory (ROM), a magnetic memory, a flash memory, a magnetic disk, or an optical disk.

[0187] Power component 706 provides power to various components of terminal 700. Power component 706 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to terminal 700.

[0188] The multimedia component 708 includes a screen that provides an output interface between the terminal 700 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 708 includes a front camera and / or a rear camera. When the terminal 700 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0189] The audio component 710 is configured to output and / or input audio signals. For example, the audio component 710 includes a microphone (MIC), and when the terminal 700 is in an operation mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 704 or sent via the communication component 716. In some embodiments, the audio component 710 also includes a speaker for outputting audio signals.

[0190] I / O interface 712 provides an interface between processing component 702 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0191] The sensor assembly 714 includes one or more sensors for providing various aspects of status assessment for the terminal 700. For example, the sensor assembly 714 can detect the open / closed state of the terminal 700, the relative positioning of the components, such as the display and keypad of the terminal 700, and the sensor assembly 714 can also detect the position change of the terminal 700 or a component of the terminal 700, the presence or absence of contact between the user and the terminal 700, the orientation or acceleration / deceleration of the terminal 700, and the temperature change of the terminal 700. The sensor assembly 714 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 714 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 714 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0192] The communication component 716 is configured to facilitate wired or wireless communication between the terminal 700 and other devices. The terminal 700 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, 4G LTE, 5G NR (New Radio) or a combination thereof. In an exemplary embodiment, the communication component 716 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 716 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0193] In an exemplary embodiment, terminal 700 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above methods.

[0194] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 704 including instructions, and the instructions can be executed by a processor 720 of a terminal 700 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0195] The embodiments of the present disclosure further provide a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable a computer to execute the cell time-frequency offset processing method described in the above embodiments of the present disclosure.

[0196] An embodiment of the present disclosure further provides a computer program product, including a computer program, and the computer program is executed by a processor to execute the cell time-frequency offset processing method described in the above embodiment of the present disclosure.

[0197] The embodiment of the present disclosure also provides a chip, which can be seen in Figure 8 Schematic diagram of the chip structure shown. Figure 8 The chip shown includes a processor 801 and an interface circuit 802. The number of the processor 801 can be one or more, and the number of the interface circuit 802 can be one or more.

[0198] Optionally, the chip also includes a memory 803, which is used to store necessary computer programs and data; the interface circuit 802 is used to receive signals from the memory 803 and send signals to the processor 801, and the signals include computer instructions stored in the memory 803. When the processor 801 executes the computer instructions, the terminal executes the cell time and frequency offset processing method described in the above embodiment of the present disclosure.

[0199] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0200] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0201] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0202] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processing module, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (control method), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or otherwise processing in a suitable manner if necessary, and then stored in a computer memory.

[0203] It should be understood that the various parts of the embodiments of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0204] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0205] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium. The above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0206] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for processing cell time-frequency offset, characterized in that: The method comprises: In response to the presence of a co-sited service cell among the multiple service cells to which the terminal supporting aggregated carrier CA is connected, determining a plurality of co-sited first service cells from the multiple service cells; Determine a first target SSB from the multiple SSBs received by the multiple first serving cells based on the distance between the synchronization signal block SSB received by the first serving cell and the wake-up position; the wake-up position is the position where the terminal starts to receive downlink data in the next discontinuous reception DRX cycle; The time-frequency offset of the first serving cell is corrected using the first target SSB.

2. The method according to claim 1, characterized in that The determining, based on the distance between the SSB received by the first serving cell and the wake-up location, a first target SSB from a plurality of SSBs received by the plurality of first serving cells, comprises: Select a first target SSB having the shortest distance from the wake-up location from among the multiple SSBs received by the multiple first service cells.

3. The method according to claim 1, characterized in that The method further comprises: In response to the presence of a non-co-sited serving cell among the multiple serving cells, determining a second non-co-sited serving cell from the multiple serving cells; The SSB received by the second service cell is used as the second target SSB, and the time-frequency offset of the second service cell is corrected using the second target SSB.

4. The method according to claim 3, characterized in that The method further comprises: A third target SSB farthest from the wake-up position is determined from the first target SSB and the second target SSB, and the terminal is started at the third target SSB position.

5. The method according to claim 1, characterized in that The method further comprises: In response to the multiple service cells being co-sited service cells, the terminal is started at the first target SSB position.

6. The method according to any one of claims 1 to 5, characterized in that The SSB received by the serving cell has a quasi-co-location QCL relationship with the corresponding serving cell.

7. The method according to any one of claims 1 to 5, characterized in that The method further comprises: Determine whether the frequency deviation, timing deviation, and signal to interference plus noise ratio SINR of each of the multiple serving cells meet preset conditions; When the frequency deviation, timing deviation and SINR of the service cell all meet the preset conditions, the service cell is determined to be a first service cell that is co-sited; or, when any one of the frequency deviation, timing deviation and SINR of the service cell does not meet the preset conditions, the service cell is determined to be a second service cell that is not co-sited.

8. The method according to claim 7, characterized in that The preset conditions include: The SINR of the serving cell is greater than a first preset threshold; The difference between the frequency deviation of the serving cell and the frequency deviation mean is less than a second preset threshold; The difference between the timing deviation of the serving cell and the mean timing deviation is less than a third preset threshold value; wherein, The frequency deviation mean is the mean of the frequency deviations of the multiple serving cells, and the timing deviation mean is the mean of the timing deviations of the multiple serving cells.

9. A cell time-frequency offset processing device, characterized in that: The device comprises: a responding unit, configured to, in response to the existence of a co-sited serving cell among a plurality of serving cells to which a terminal supporting CA is connected, determine a plurality of co-sited first serving cells from the plurality of serving cells; a determining unit, configured to determine a first target SSB from a plurality of SSBs received by the plurality of first serving cells based on the SSB received by the first serving cell; the wake-up position being a position at which the terminal starts to receive downlink data in a next DRX cycle; A processing unit is used to correct the time-frequency offset of the first serving cell using the first target SSB.

10. A terminal, characterized in that: include: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 8.

11. A non-transitory computer-readable storage medium storing computer instructions, characterized in that: The computer instructions are used to cause the computer to execute the method according to any one of claims 1 to 8.

12. A chip, characterized in that: It comprises one or more interface circuits and one or more processors; the interface circuit is used to receive a signal from a memory of a terminal and send the signal to the processor, the signal comprises a computer instruction stored in the memory, and when the processor executes the computer instruction, the terminal executes the method according to any one of claims 1 to 8.

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