Cell reselection method, apparatus, electronic device, and storage medium

Abstract

The application provides a cell reselection method, device, electronic device and storage medium, wherein the method comprises: in the case that there are first candidate cells and the number of the first candidate cells is greater than a first preset value, performing signal quality evaluation on the first candidate cells for a first evaluation duration, the first candidate cells being cells whose second quality parameter satisfies a first preset condition, and the first evaluation duration being less than a preset evaluation duration; and selecting a target cell from the first candidate cells based on the evaluation result of the signal quality evaluation. The method provided in the application embodiment improves the efficiency of cell reselection.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a cell reselection method, apparatus, electronic settings, and storage medium. Background Technology

[0002] Cell reselection refers to the process by which a terminal monitors the signal quality of neighboring cells and the current serving cell to select a cell with better signal quality to provide communication services. When a neighboring cell meets the cell reselection rules, the terminal will access and camp in that neighboring cell.

[0003] Currently, cell reselection methods require a time-consuming evaluation of the terminal's current serving cell and its neighboring cells before determining the cell the terminal will access. This process is time-consuming and results in low efficiency for cell reselection. Summary of the Invention

[0004] This application provides a cell reselection method, apparatus, electronic settings, and storage medium, which improves the efficiency of cell reselection.

[0005] To achieve the above objectives, in a first aspect, embodiments of this application provide a cell reselection method, including:

[0006] If there is a first candidate cell and the number of the first candidate cells is greater than a first preset value, the signal quality of the first candidate cell is evaluated for a first evaluation time. The first candidate cell is a cell whose second quality parameter meets the first preset condition. The first evaluation time is less than the preset evaluation time.

[0007] Based on the evaluation results of the signal quality assessment, a target cell is selected from the first candidate cells.

[0008] Secondly, embodiments of this application provide a cell reselection device, comprising:

[0009] The first evaluation module is used to evaluate the signal quality of the first candidate cell for a first evaluation time when there is a first candidate cell and the number of the first candidate cells is greater than a first preset value. The first candidate cell is a cell whose second quality parameter meets the first preset condition. The first evaluation time is less than the preset evaluation time.

[0010] The first determining module is used to select a target cell from the first candidate cells based on the evaluation results of the signal quality assessment.

[0011] Thirdly, embodiments of this application provide an electronic device, including a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps in the cell reselection method as described in the first aspect.

[0012] Fourthly, embodiments of this application provide a readable storage medium storing a program that, when executed by a processor, implements the steps in the cell reselection method as described in the first aspect.

[0013] In this embodiment, when a first candidate cell exists and its number is greater than a first preset value, a signal quality assessment is performed on the first candidate cell for a first assessment time shorter than a preset assessment time. Based on the assessment results, a target cell is selected from the first candidate cells. This shortens the assessment time and improves the efficiency of cell reselection. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings are described below. Obviously, the following drawings are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the listed drawings without creative effort.

[0015] Figure 1 This is one of the flowcharts illustrating the cell reselection method provided in the embodiments of this application;

[0016] Figure 2 This is the second flowchart of the cell reselection method provided in the embodiments of this application;

[0017] Figure 3 This is a schematic diagram of the cell reselection device provided in the embodiments of this application;

[0018] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] To facilitate understanding, a brief introduction to the relevant background information for this application will be provided below.

[0022] In wireless communication systems (such as 4G and 5G), the communication frequency of terminals is getting higher and higher, the coverage radius of cells is getting smaller and smaller, and mobile terminals are performing cell handover and reselection more and more frequently in wireless communication systems.

[0023] To ensure the stability of communication services, a terminal needs to continuously discover, measure, and evaluate neighboring cells while camping on a particular cell. By monitoring the signal quality of neighboring cells and the current serving cell, it can select a cell with better signal quality to provide communication services. When a neighboring cell meets the cell reselection rules, the terminal will access and camp on that neighboring cell.

[0024] Currently, cell reselection methods require a time-consuming evaluation of the terminal's current serving cell and its neighboring cells before determining the cell the terminal will access. This process is time-consuming, resulting in low efficiency and increased terminal power consumption.

[0025] To address the aforementioned problems, this application provides a cell reselection method. Please refer to [link to relevant documentation]. Figure 1 , Figure 1 This is one of the flowcharts illustrating the cell reselection method provided in this application embodiment. The cell reselection method provided in this application embodiment can be executed by a terminal, such as... Figure 1 As shown, the cell reselection method provided in this application includes the following steps:

[0026] Step 101: If a first candidate cell exists and the number of the first candidate cells is greater than a first preset value, perform a signal quality assessment on the first candidate cell for a first assessment duration. The first candidate cell is a cell whose second quality parameter meets the first preset condition. The first assessment duration is less than a preset assessment duration (T). evaluate );

[0027] In specific implementation, it is determined in turn whether the second quality parameter of each of the candidate cells meets the first preset condition, and whether the number of first candidate cells P (P is a positive integer) is greater than the first preset value. Cells that meet the first preset condition and P is greater than the first preset value are first candidate cells, and the first candidate cells are evaluated for a first evaluation time.

[0028] In practice, the first preset value can be set according to the actual situation, such as 1, 3, 4, or 7. In an optional embodiment, the first preset value is a positive integer greater than 1. In this embodiment, by making P greater than the first preset value (a positive integer greater than 1), the number of first candidate cells can be sufficiently large, so that the range of selectable cells is large enough, making it easier to select a target cell with better signal quality from a sufficiently large range of selectable cells.

[0029] The preset evaluation duration is the evaluation duration determined according to the agreement standards. The first evaluation duration can be determined based on the preset evaluation duration, and the determination method includes, but is not limited to, the following three:

[0030] Method 1: Multiply the preset evaluation duration by g to obtain the first evaluation duration, where g is a real number greater than 0 and less than 1.

[0031] Method 2: Divide the preset evaluation time by h to obtain the first evaluation time, where h is a real number greater than 1.

[0032] Method 3: Subtract the first preset time from the preset evaluation time to obtain the first evaluation time. The first preset time can be determined according to actual needs.

[0033] Signal quality assessment of the first candidate cell over a first assessment duration refers to evaluating the signal quality of each cell in the first candidate cell set within that first assessment duration, and obtaining the signal quality assessment results. The signal quality assessment results include the signal quality performance of each cell in the first candidate cell within the first assessment duration.

[0034] Step 102: Based on the evaluation results of the signal quality assessment, select the target cell from the first candidate cells.

[0035] In practice, based on the evaluation results of the signal quality assessment, the first candidate cell with the best overall signal quality within the first evaluation time period can be selected from the first candidate cells, and this first candidate cell can be determined as the target cell.

[0036] After the target cell is determined, the terminal switches from the current serving cell to the target cell, and the target cell provides communication services to the terminal.

[0037] In this embodiment, when a first candidate cell exists and its number is greater than a first preset value, a signal quality assessment is performed on the first candidate cell for a first assessment time shorter than a preset assessment time. Based on the assessment results, a target cell is selected from the first candidate cells. This shortens the assessment time and improves the efficiency of cell reselection.

[0038] In one embodiment, prior to step 101, the method further includes:

[0039] Step 103: Determine a number of candidate cells, wherein the first quality parameter of each of the candidate cells is greater than or equal to a first threshold.

[0040] In a specific implementation, for example, based on the quality detection results of N cells, M cells (M cells are several candidate cells) can be determined from the N cells. The first quality parameter of each of the M cells is greater than or equal to a first threshold, and N and M are positive integers.

[0041] The value of N can be set according to the actual situation. The N cells can be the neighboring cells of the terminal's current serving cell. The neighboring cells can be co-frequency neighboring cells or inter-frequency neighboring cells. In an optional embodiment, the N cells include the terminal's current serving cell and the neighboring cells of the serving cell.

[0042] The aforementioned quality detection results refer to the results obtained by detecting the signal quality of N cells, with each of the N cells corresponding to one quality detection result. The first quality parameter is a parameter characterizing the signal quality of a cell. In an optional embodiment, the first quality parameter includes at least one of the following:

[0043] Reference signal received power RSRP;

[0044] Reference signal reception quality (RSRQ);

[0045] Signal-to-interference-plus-noise ratio (SINR);

[0046] Signal-to-noise ratio (SNR);

[0047] Timing deviation TO;

[0048] The R value is determined based on RSRP, RSRQ, and TO;

[0049] The S-value is determined based on RSRP, RSRQ, and TO.

[0050] The aforementioned R and S values ​​can be calculated according to the provisions of existing standard protocols. Specifically, the R value is a value calculated based on the R criterion in the relevant standard protocol; the S value is a value calculated based on the S criterion in the relevant standard protocol.

[0051] The first threshold can be preset according to actual conditions. When the first quality parameter includes multiple parameters, the first threshold includes multiple thresholds corresponding one-to-one with each parameter. For example, when the first quality parameter includes RSRP and RSRQ, the first threshold includes the threshold corresponding to RSRP and the threshold corresponding to RSRQ. When the first quality parameter includes multiple parameters, "the first quality parameter of each cell in M ​​cells is greater than or equal to the first threshold" means that every parameter of each cell in M ​​cells must be greater than or equal to the threshold corresponding to that parameter. Multiple parameters in the first quality parameter of each cell in N cells are compared sequentially with their corresponding thresholds. Cells whose multiple parameters in the first quality parameter are all greater than or equal to their corresponding thresholds are identified as cells in the M cells.

[0052] When the first quality parameter includes a single parameter, the first threshold includes a threshold corresponding to that parameter. For example, the first quality parameter includes an S value, and the first threshold includes a threshold corresponding to the S value. The S value of each of the N cells is compared with the corresponding threshold, and cells with an S value greater than or equal to the corresponding threshold are identified as cells among the M cells.

[0053] The first quality parameter of each of the N cells is compared with the first threshold. Cells whose first quality parameter is greater than or equal to the first threshold are identified as cells in the M cells.

[0054] Based on the quality detection results of N cells, M cells with a first quality parameter greater than or equal to a first threshold are selected from the N cells. Then, first candidate cells are selected from these M cells, and finally, the target cell is selected from the first candidate cells. This reduces the number of cells participating in the cell reselection evaluation, thereby improving the efficiency of cell reselection.

[0055] In this embodiment, by pre-determining a number of candidate cells, it is determined whether a first candidate cell exists among the candidate cells and whether the number of the first candidate cells is greater than a first preset value. If a first candidate cell exists and its number is greater than the first preset value, signal quality is evaluated on the first candidate cell for a first evaluation duration. This allows for the preliminary selection of a number of candidate cells, followed by the determination of the first candidate cell based on these candidate cells. This reduces the number of cells participating in the cell reselection evaluation, thereby improving the efficiency of cell reselection.

[0056] In one embodiment, the second quality parameter includes a first R difference, which is the difference between the R value at the current time and the R value at a first time, where the first time is a historical time prior to the current time.

[0057] The first preset condition includes the first R difference being located within a first preset interval.

[0058] For example, if the current R value is R0 and the R value at the first moment is R1, the first R difference δR0 = R0 - R1. The first R difference can characterize the degree of change in channel quality. The larger the first R difference, the more drastic the change in signal quality; the smaller the first R difference, the smaller the change in signal quality. The smaller the change in signal quality, the better the signal quality.

[0059] The first preset interval can be set according to the actual situation. For example, the first preset interval is (-c, c), where c is a positive real number.

[0060] In this embodiment, P first candidate cells are determined from M cells according to a first preset condition, and then the target cell is determined from the P first candidate cells. This reduces the number of cells participating in the cell reselection evaluation, thereby improving the efficiency of cell reselection.

[0061] In one embodiment, the second quality parameter further includes a first TO difference, which is the difference between the TO value at the current time and the TO value at the second time, wherein the second time is a historical time prior to the current time;

[0062] The first preset condition includes that the first R difference is located in a first preset interval, and the first TO difference corresponding to the first R difference is located in a second preset interval.

[0063] It should be understood that the second moment and the first moment can be the same moment or different moments.

[0064] As mentioned earlier, the first R difference is the difference between the R value at the current time and the R value at the first time, and the first TO difference is the difference between the TO value at the current time and the TO value at the second time. The correspondence between the first R difference and the first TO difference means that the time periods corresponding to the first R difference and the first TO difference are exactly the same or approximately the same. The time periods corresponding to the first R difference and the first TO difference are exactly the same, meaning the first time and the second time are equal; the time periods corresponding to the first R difference and the first TO difference are approximately the same, meaning the first time and the second time are approximately equal, for example, the first time is 1 second before the current time, and the second time is 0.99 seconds before the current time.

[0065] For example, the TO value at the current time is TO0, and the TO value at the second time is TO1. The first TO difference δTO0 = TO0 - TO1.

[0066] The first TO difference characterizes the change in the terminal's position relative to the cell corresponding to the first TO difference (whether it is moving away from or closer to the cell). A larger first TO difference indicates a greater change in the terminal's position relative to the cell, while a smaller first TO difference indicates a smaller change. The second preset interval can be set according to actual conditions; for example, the first preset interval could be (-d, d), where d is a positive real number. Cells with smaller positional changes generally have better signal quality.

[0067] In this embodiment, by further including the first preset condition that the first TO difference corresponding to the first R difference is located in the second preset interval, the first TO difference can be used to help determine whether the terminal is far away from or close to the cell corresponding to the first TO difference. And by using the first R difference and the first TO difference, P first candidate cells with small position changes can be selected from M cells. In this way, the number of cells participating in the cell reselection evaluation can be further reduced, thereby improving the efficiency of cell reselection.

[0068] Furthermore, the first TO difference can replace the Geographic Information System (GIS) of the terminal and the base station. Obtaining GIS information will increase the power consumption of the terminal and the overall time consumed by cell reselection. In this embodiment, the first TO difference is used to replace GIS information, which eliminates the need for additional time to obtain GIS information, thereby further improving the efficiency of cell reselection.

[0069] In one embodiment, the method further includes:

[0070] If the first candidate cell does not exist, or if the first candidate cell exists but the number of the first candidate cells is not greater than the first preset value, and if the second candidate cell exists and the number of the second candidate cell is greater than the second preset value, the signal quality of the second candidate cell is evaluated for a second evaluation time. The second candidate cell is a cell whose second quality parameter meets the second preset condition. The second evaluation time is longer than the first evaluation time and shorter than the preset evaluation time. The cell signal quality requirement corresponding to the second preset condition is lower than the cell signal quality requirement corresponding to the first preset condition.

[0071] Based on the evaluation results of the signal quality assessment, a target cell is selected from the first candidate cells.

[0072] In specific implementation, if there is no first candidate cell, or if there is a first candidate cell but the number of the first candidate cells is not greater than the first preset value, the second quality parameter of each of the several candidate cells is sequentially determined to meet the second preset condition, and the number of second candidate cells S (S is a positive integer) is greater than the second preset value. Cells that meet the second preset condition and S is greater than the second preset value are second candidate cells, and the second candidate cells are evaluated for a second evaluation time.

[0073] In practice, the second preset value can be set according to the actual situation, such as 1, 2, 5, or 7. In an optional embodiment, the second preset value is a positive integer greater than 1. In this embodiment, by making S greater than the second preset value (a positive integer greater than 1), the number of second candidate cells can be sufficiently large, so that the range of selectable cells is large enough, making it easier to select a target cell with better signal quality from a sufficiently large range of selectable cells.

[0074] The second assessment duration can also be determined based on a preset assessment duration, and the determination methods include, but are not limited to, the following three:

[0075] Method 1: Multiply the preset evaluation duration by e to obtain the second evaluation duration, where e is a real number greater than g and less than 1.

[0076] Method 2: Divide the preset evaluation duration by f to obtain the second evaluation duration, where f is a real number greater than h.

[0077] Method 3: Subtract the second preset duration from the preset evaluation duration to obtain the second evaluation duration. The second preset duration can be determined according to actual needs, and the second preset duration is longer than the first preset duration.

[0078] Signal quality assessment of the second candidate cells over a second assessment duration refers to evaluating the signal quality of each cell in the second candidate cells within that second assessment duration, and obtaining the signal quality assessment results. The signal quality assessment results include the signal quality performance of each cell in the second candidate cells within the second assessment duration.

[0079] It should be understood that both the first and second preset conditions are requirements for signal quality. The signal quality of the first candidate cell that meets the first preset condition is better than that of the second candidate cell that meets the second preset condition. Therefore, if the signal quality of the second candidate cell is inferior to that of the first candidate cell, the second evaluation time is longer than the first evaluation time, giving the second candidate cell a longer evaluation time to fully evaluate its signal quality and select the target cell from among the second candidate cells.

[0080] The second preset condition can be set according to the actual situation. In one embodiment, the second quality parameter includes a first R difference and a second R difference. The first R difference is the difference between the R value at the current time and the R value at the first time. The second R difference is the difference between the R value at the first time and the R value at the third time. The third time is the time before the first time.

[0081] The second preset condition includes the first R difference or the second R difference being located in a third preset interval.

[0082] It should be understood that the third preset interval can be the same as the first preset interval.

[0083] For example, if the value of R at the current moment is R0, the value of R at the first moment is R1, and the value of R at the third moment is R2, the first R difference δR0 = R0 - R1, and the second R difference δR1 = R1 - R2.

[0084] Furthermore, the R value can be measured multiple times at different times, and multiple R differences can be determined based on the R value. If there is an R difference among the multiple R differences that is located in the third preset interval, the cell corresponding to the R difference can be determined as the second candidate cell.

[0085] In another embodiment, the second quality parameter includes a second TO difference and a third TO difference. The second TO difference is the difference between the TO value at the current time and the TO value at the fourth time. The third TO difference is the difference between the TO value at the fourth time and the TO value at the fifth time. The fourth time is a historical time before the current time, and the fifth time is a time before the fourth time.

[0086] The second preset condition includes the second TO difference or the third TO difference being located in the fourth preset interval.

[0087] It should be understood that the fourth time point can be the same as the second time point. When the fourth time point is the same as the second time point, the second TO difference is the first TO difference. The fourth preset interval can be the same as the second preset interval.

[0088] In one embodiment, when the second preset condition is set based on the first R difference and the second R difference, the second preset condition set based on the first TO difference and the second TO difference can also be used as the third preset condition to determine the third candidate cell. Specifically, the method further includes:

[0089] If there is no first candidate cell or the first candidate cell exists but the number of the first candidate cells is not greater than the first preset value, if there is no second candidate cell or the second candidate cell exists but the number of the second candidate cells is not greater than the second preset value, and if there is a third candidate cell and the number of the third candidate cells is greater than the third preset value, the signal quality of the third candidate cell is evaluated for a third evaluation duration, the third evaluation duration is longer than the second evaluation duration, the third candidate cell is a cell whose second quality parameter meets the third preset condition, and the signal quality requirement of the cell corresponding to the third preset condition is lower than the signal quality requirement of the cell corresponding to the second preset condition;

[0090] Based on the evaluation results of the signal quality assessment, a target cell is selected from at least one third candidate cell.

[0091] In specific implementation, if there is no first candidate cell, or if there is a first candidate cell but the number of the first candidate cells is not greater than the first preset value and there is no second candidate cell, or if there is a second candidate cell but the number of the second candidate cells is not greater than the second preset value, then the second quality parameter of each of the several candidate cells is sequentially determined to meet the third preset condition, and the number L of the third candidate cells (L is a positive integer) is greater than the third preset value. Cells that meet the third preset condition and L is greater than the third preset value are the third candidate cells, and the third candidate cells are evaluated with a third evaluation time.

[0092] In practice, the third preset value can be set according to the actual situation. For example, the first preset value can be 1, 2, 5, or 7. In an optional embodiment, the third preset value is a positive integer greater than 1. In this embodiment, by making L greater than the third preset value (a positive integer greater than 1), the number of third candidate cells can be sufficiently large, so that the range of selectable cells is large enough, making it easier to select a target cell with better signal quality from a sufficiently large range of selectable cells.

[0093] The third precondition is also a requirement for signal quality. The signal quality of the second candidate cell that meets the second precondition is better than that of the third candidate cell that meets the third precondition. Therefore, when the signal quality of the third candidate cell is inferior to that of the second candidate cell, the third evaluation time is longer than the second evaluation time, giving the third candidate cell a longer evaluation time to fully evaluate its signal quality and determine the target cell based on the evaluation results.

[0094] The third assessment time can be shorter than the preset assessment time. When the third assessment time is shorter than the preset assessment time, the assessment time can be shortened, thereby improving the efficiency of cell reselection.

[0095] To more fully evaluate the signal quality of the third candidate cell, the third evaluation duration can also be equal to the preset evaluation duration.

[0096] In practical applications, the signal quality requirements of the cells corresponding to the second preset condition may be too high, making it impossible to select a suitable second candidate cell from a pool of candidate cells. Alternatively, while suitable second candidate cells may be selected, their number may not exceed the second preset value, resulting in the inability to perform cell reselection or to perform it effectively. Therefore, the signal quality requirements of the cells corresponding to the third preset condition are lower than those corresponding to the second preset condition.

[0097] In specific implementation, the third preset condition can be set according to the actual situation. In another embodiment, the third preset condition includes at least one of the three TO differences being located in the fourth preset interval, and the time periods corresponding to each of the three TO differences being different. The TO difference is the difference between the TO values ​​at two different times.

[0098] "At least three TO differences, each corresponding to a different time period" means that the time periods corresponding to each of the at least three TO differences do not overlap or do not completely overlap in time. For example, the at least three TO differences include a first TO difference, a second TO difference, and a third TO difference. The time period corresponding to the first TO difference is the period from the current time to 1 second before the current time, the time period corresponding to the second TO difference is the period from 1 second before the current time to 2 seconds before the current time, and the time period corresponding to the third TO difference is the period from 4 seconds before the current time to 5 seconds before the current time.

[0099] In this embodiment, the above settings can reduce the cell signal quality requirements corresponding to the third preset condition, so as to ensure that a third candidate cell can be selected from several candidate cells for cell reselection.

[0100] To more reasonably determine the length of the first evaluation period, balancing improved cell reselection efficiency with sufficient assessment of cell signal quality, in one embodiment, the second quality parameter includes a signal stability value, which is the average of the absolute values ​​of at least two R differences, wherein the at least two R differences correspond to different time periods, and the R difference is the difference between the R values ​​at two different times.

[0101] The R-difference is the difference between the R values ​​at two different times, and the time period between these two different times is the time period corresponding to this R-difference. For example, if the R-difference is the difference between the R value at the first time and the R value at the second time, then the time period corresponding to the R-difference is the time period between the first time and the second time.

[0102] At least two R differences correspond to different time periods, meaning that the time periods corresponding to each of the at least two R differences do not overlap or do not completely overlap in time. For example, at least two R differences include a first R difference and a second R difference, where the time period corresponding to the first R difference is the period between the current time and 1 second before the current time, and the time period corresponding to the second R difference is the period between 1 second before the current time and 2 seconds before the current time.

[0103] For example, if the current value of R is R0, the value of R at the first time is R1, and the value of R at the third time is R2, the first R difference δR0 = R0 - R1, and the second R difference δR1 = R1 - R2. The stable signal value ΔR0 = (|δR0| + |δR1|) / 2.

[0104] The signal stability value can characterize the stability of signal quality. The smaller the signal stability value, the more stable the signal and the better the signal quality; the larger the signal stability value, the less stable the signal and the worse the signal quality.

[0105] When a first candidate cell exists and the number of the first candidate cells is greater than a first preset value, the step of evaluating the signal quality of the first candidate cell for a first evaluation duration includes:

[0106] For each cell in the first candidate cells:

[0107] Determine whether the stable value of the signal is less than the first stable signal threshold;

[0108] When the signal stability value is less than the first signal stability threshold, a times the preset evaluation time of the first candidate cell corresponding to the signal stability value is determined as the first evaluation time of the first candidate cell corresponding to the signal stability value, where a is a real number greater than 0 and less than 1.

[0109] When the signal stability value is greater than or equal to the first signal stability threshold, b times the preset evaluation time of the first candidate cell corresponding to the signal stability value is determined as the first evaluation time of the first candidate cell corresponding to the signal stability value, where b is a real number greater than a and less than 1.

[0110] The first candidate cell is evaluated using the first evaluation duration corresponding to the first candidate cell.

[0111] It should be understood that when the signal stability value is less than the first signal stability threshold, the signal quality of the first candidate cell corresponding to that signal stability value is better than that of the first candidate cell corresponding to the first signal stability value when the signal stability value is greater than or equal to the first signal stability threshold. Therefore, through the above settings, the first evaluation time of the first candidate cell with poor signal quality can be longer than the evaluation time of the first candidate cell with better signal quality. This allows for a more reasonable determination of the length of the first evaluation time, balancing the improvement of cell reselection efficiency with a thorough evaluation of the cell's signal quality.

[0112] In the case where there is no first candidate cell, or the first candidate cell exists but its number is not greater than the first preset value, and a second candidate cell exists and its number is greater than the second preset value, the step of evaluating the signal quality of the second candidate cell for a second evaluation duration includes:

[0113] For each second candidate cell:

[0114] Determine whether the stable value of the signal is less than the second stable threshold;

[0115] When the signal stability value is less than the second signal stability threshold, i times the preset evaluation time corresponding to the second candidate cell is determined as the second evaluation time of the second candidate cell, where i is a real number greater than 0 and less than 1;

[0116] When the signal stability value is greater than or equal to the second signal stability threshold, j times the preset evaluation time corresponding to the second candidate cell is determined as the second evaluation time of the second candidate cell, where j is a real number greater than i and less than 1;

[0117] The signal quality of the second candidate cell is evaluated using the corresponding second evaluation duration.

[0118] It should be understood that the second signal stabilization threshold can be equal to the first signal stabilization threshold. Optionally, i is a real number greater than b and less than 1.

[0119] When the signal stability value is less than the second signal stability threshold, the signal quality of the second candidate cell corresponding to that signal stability value is better than that of the second candidate cell when the signal stability value is greater than or equal to the second signal stability threshold. Therefore, through the above settings, the second evaluation time of the second candidate cell with poor signal quality can be longer than the evaluation time of the second candidate cell with better signal quality. This allows for a more reasonable determination of the second evaluation time, balancing the improvement of cell reselection efficiency with a thorough evaluation of cell signal quality.

[0120] In practical applications, cell signal quality may experience sudden signal changes. If the quality detection result only includes the result of a single measurement, then that result may have been obtained just as the signal changed, and the quality detection result cannot accurately reflect the cell's signal quality. To improve the accuracy of the determined first candidate cell set, in one embodiment, determining several candidate cells, where the first quality parameter of each of the several candidate cells is greater than or equal to a first threshold, includes:

[0121] Obtain K first quality parameters of the fourth cell in K different time periods, where the fourth cell is any one of the N cells and K is a positive integer greater than 1;

[0122] If at least one of the K first quality parameters is greater than the first threshold, the fourth cell is determined as one of the candidate cells.

[0123] It should be understood that signal mutations are low-probability events, occurring at most in one of the K different time periods. Therefore, at most one of the K first quality parameters will be unavailable. By acquiring the K first quality parameters of the fourth cell within the K different time periods, and if at least one of the K first quality parameters is greater than a first threshold, the fourth cell is identified as one of the candidate cells. This reduces the interference of the first quality parameters measured during signal mutations on the final determination of the candidate cells, thereby improving the accuracy of the determined first candidate cell set.

[0124] Please see Figure 2 To facilitate understanding, the cell reselection method provided in this application will be described below with a complete embodiment.

[0125] 1. Perform multiple signal quality measurements on each of the N cells according to the measurement period (the following explanation uses three measurements as an example).

[0126] 1.1 In the first time period, the RSRP2, RSRQ2, and TO2 of each of the N cells are measured, and the S2 value and R2 value are calculated based on RSRP2, RSRQ2, and TO2;

[0127] 1.2 In the second time period, RSRP1, RSRQ1, and TO1 of each of the N cells are measured, and the S1 value and R1 value are calculated based on RSRP1, RSRQ1, and TO1;

[0128] 1.3 In the third time period, the RSRP0, RSRQ0, and TO0 of each of the N cells are measured, and the S0 and R0 values ​​are calculated based on RSRP0, RSRQ0, and TO0.

[0129] The time distance between the first, second, and third time periods and the current time decreases sequentially. The end time of the third time period is the current time. That is to say, the RSRP0, RSRQ0, and TO0 of each of the N cells measured in the third time period may be the RSRP0, RSRQ0, and TO0 of the current time.

[0130] 2. Sequentially determine whether at least one of the first quality parameters (a set of first quality parameters includes those obtained from three measurements) for each of the N cells is greater than a first threshold. If it is, the cell corresponding to that set of first quality parameters is one of the M cells. If it is not, it means that the cell corresponding to that set of first quality parameters has poor signal quality, and the cell is discarded and will not participate in cell reselection. In this way, M cells with first quality parameters greater than or equal to the first threshold can be selected from the N cells, and the target cell can be determined based on the M cells in subsequent steps.

[0131] 3. Determine a set of second quality parameters for each of the M cells. Each set of second quality parameters includes δR0 = R0 - R1, δR1 = R1 - R2, δTO0 = TO0 - TO1, and δTO1 = TO1 - TO2.

[0132] 4. Determine whether a set of second quality parameters corresponding to each of the M cells meets the first preset condition. The first preset condition is that δR0 is located in the first preset interval and δTO1 is located in the second preset interval. Cells that meet the first preset condition are first candidate cells. Determine whether the total number P of first candidate cells is greater than the first preset value. If yes, continue to determine whether the signal stability value of each of the P first candidate cells is less than the first signal stability threshold. If no, proceed to step 5. The signal stability value is ΔR0 = (|δR0| + |δR1|) / 2.

[0133] 4.1 The first evaluation duration for cells whose signal stability value is less than the first signal stability threshold among the P first candidate cells is the preset evaluation duration multiplied by factor0;

[0134] 4.2 The first evaluation duration for cells whose signal stability value is greater than or equal to the first signal stability threshold among the P first candidate cells is the preset evaluation duration multiplied by factor1;

[0135] 4.3 Evaluate the signal quality (i.e., reselection evaluation) of P first candidate cells for a first evaluation duration, and determine the target cell from the P first candidate cells;

[0136] 5. Determine whether a set of second quality parameters corresponding to each of the M cells satisfies a second preset condition. The second preset condition is that δR0 or δR1 is within a second preset interval. The cells that satisfy the second preset condition are second candidate cells. Determine whether the total number S of second candidate cells is greater than a second preset value. If so, continue to determine whether the signal stability value of each of the S second candidate cells is less than a first signal stability threshold; if not, execute 6;

[0137] 5.1 The second evaluation duration corresponding to the cells in the S second candidate cells whose signal stability value is less than a second signal stability threshold is the preset evaluation duration multiplied by factor2;

[0138] 5.2 The second evaluation duration corresponding to the cells in the S second candidate cells whose signal stability value is greater than or equal to the second signal stability threshold is the preset evaluation duration multiplied by factor3;

[0139] 5.3 Evaluate the signal quality (i.e., reselection evaluation) of the S second candidate cells for a second evaluation duration, and determine the target cell from the S first candidate cells;

[0140] 6. Determine whether a set of second quality parameters corresponding to each of the M cells satisfies a third preset condition. The third preset condition is that δTO0 or δTO1 is within a second preset interval. The cells that satisfy the third preset condition are third candidate cells. Determine whether there are any third candidate cells. If there are, evaluate the signal quality (i.e., reselection evaluation) of at least one third candidate cell for the preset evaluation duration, and determine the target cell from at least one third candidate cell according to the evaluation result of the signal quality evaluation;

[0141] Where, 0 < factor0 < factor1 < factor2 < factor3 < 1, and factor0, factor1, factor2, and factor3 are scaling factors.

[0142] This embodiment has at least the following beneficial effects:

[0143] 1. In this embodiment, M cells are selected from N cells, and then P first candidate cells are selected from the M cells according to a first preset condition. If none of the P first candidate cells exist, S second candidate cells are selected from the M cells according to a second preset condition. If none of the S second candidate cells exist, a third candidate cell is selected from the M cells according to a third preset condition. A reselection evaluation is then performed on the P first candidate cells, the S second candidate cells, or the third candidate cells to determine the target cell. This reduces the number of cells participating in the reselection evaluation, thereby improving the efficiency of cell reselection.

[0144] 2. In this embodiment, M cells are divided into first candidate cells, second candidate cells, and third candidate cells according to the quality of their signals. The first candidate cells and second candidate cells are further distinguished according to the signal stability value. Different evaluation durations (referring to the first evaluation duration, the second evaluation duration, and the third evaluation duration) are set for cells with different signal quality. This can shorten the evaluation duration and improve the efficiency of cell reselection while taking into account the sufficiency of the reselection evaluation, so that cells with poor signal quality can be fully evaluated, thereby making the final target cell more reasonable.

[0145] 3. In this embodiment, by setting a first signal stability threshold / a second signal stability threshold, and by selectively shortening the evaluation time of each cell based on the relationship between the signal stability value of each cell and the first signal stability threshold / the second signal stability threshold, a longer evaluation time is not required for cells with already good signal quality. Therefore, selectively and reasonably shortening the evaluation time will not affect the final evaluation result.

[0146] See Figure 3 This application also provides a cell reselection device 200, comprising:

[0147] The first evaluation module 201 is used to evaluate the signal quality of the first candidate cell for a first evaluation time when there is a first candidate cell and the number of the first candidate cells is greater than a first preset value. The first candidate cell is a cell whose second quality parameter meets the first preset condition. The first evaluation time is less than the preset evaluation time.

[0148] The first determining module 202 is used to select a target cell from the first candidate cells based on the evaluation results of the signal quality assessment.

[0149] Optionally, the device 200 further includes:

[0150] The second evaluation module is used to evaluate the signal quality of the second candidate cell for a second evaluation duration when there is no first candidate cell or the first candidate cell exists but the number of the first candidate cells is not greater than the first preset value, and a second candidate cell exists and the number of the second candidate cells is greater than the second preset value. The second candidate cell is a cell whose second quality parameter meets the second preset condition. The second evaluation duration is longer than the first evaluation duration and shorter than the preset evaluation duration. The cell signal quality requirement corresponding to the second preset condition is lower than the cell signal quality requirement corresponding to the first preset condition.

[0151] The second determining module is used to select a target cell from the second candidate cells based on the evaluation results of the signal quality assessment.

[0152] Optionally, the device 200 further includes:

[0153] The third evaluation module is used to evaluate the signal quality of the third candidate cell for a third evaluation duration when there is no first candidate cell or the first candidate cell exists but the number of the first candidate cells is not greater than the first preset value, there is no second candidate cell or the second candidate cell exists but the number of the second candidate cells is not greater than the second preset value, and there is a third candidate cell and the number of the third candidate cells is greater than the third preset value. The third evaluation duration is longer than the second evaluation duration. The third candidate cell is a cell whose second quality parameter meets the third preset condition. The cell signal quality requirement corresponding to the third preset condition is lower than the cell signal quality requirement corresponding to the second preset condition.

[0154] The third determining module is used to select a target cell from at least one third candidate cell based on the evaluation results of the signal quality assessment.

[0155] Optionally, the second quality parameter includes a first R difference, which is the difference between the R value at the current time and the R value at a first time, where the first time is a historical time prior to the current time.

[0156] The first preset condition includes the first R difference being located within a first preset interval.

[0157] And / or, the second quality parameter further includes a first TO difference, which is the difference between the TO value at the current time and the TO value at the second time, where the second time is a historical time prior to the current time;

[0158] The first preset condition includes that the first R difference is located in a first preset interval, and the first TO difference corresponding to the first R difference is located in a second preset interval.

[0159] Optionally, the second quality parameter includes a first R difference and a second R difference, wherein the first R difference is the difference between the R value at the current time and the R value at the first time, and the second R difference is the difference between the R value at the first time and the R value at the third time, wherein the third time is the time before the first time.

[0160] The second preset condition includes either the first R difference or the second R difference being located within a third preset interval;

[0161] or,

[0162] The second quality parameter includes a second TO difference and a third TO difference. The second TO difference is the difference between the TO value at the current time and the TO value at the fourth time. The third TO difference is the difference between the TO value at the fourth time and the TO value at the fifth time. The fourth time is a historical time before the current time, and the fifth time is a time before the fourth time.

[0163] The second preset condition includes the second TO difference or the third TO difference being located in the fourth preset interval.

[0164] Optionally, the second quality parameter includes a signal stability value, which includes the average of the absolute values ​​of at least two R differences, wherein the at least two R differences correspond to different time periods, and the R difference is the difference between the R values ​​at two different times.

[0165] The step of evaluating the signal quality of the first candidate cell for a first evaluation duration includes:

[0166] For each cell in the first candidate cells:

[0167] Determine whether the stable value of the signal is less than the first stable signal threshold;

[0168] When the signal stability value is less than the first signal stability threshold, a times the preset evaluation time of the first candidate cell corresponding to the signal stability value is determined as the first evaluation time of the first candidate cell corresponding to the signal stability value, where a is a real number greater than 0 and less than 1.

[0169] When the signal stability value is greater than or equal to the first signal stability threshold, b times the preset evaluation time of the first candidate cell corresponding to the signal stability value is determined as the first evaluation time of the first candidate cell corresponding to the signal stability value, where b is a real number greater than a and less than 1.

[0170] The signal quality of the first candidate cell is evaluated using the first evaluation duration corresponding to the first candidate cell.

[0171] Optionally, the second quality parameter includes a signal stability value, which includes the average of the absolute values ​​of at least two R differences, wherein the at least two R differences correspond to different time periods, and the R difference is the difference between the R values ​​at two different times.

[0172] The signal quality assessment of the second candidate cell for the second assessment duration includes:

[0173] For each second candidate cell:

[0174] Determine whether the stable value of the signal is less than the second stable threshold;

[0175] When the signal stability value is less than the second signal stability threshold, i times the preset evaluation time corresponding to the second candidate cell is determined as the second evaluation time of the second candidate cell, where i is a real number greater than 0 and less than 1;

[0176] When the signal stability value is greater than or equal to the second signal stability threshold, j times the preset evaluation time corresponding to the second candidate cell is determined as the second evaluation time of the second candidate cell, where j is a real number greater than i and less than 1;

[0177] The signal quality of the second candidate cell is evaluated using the corresponding second evaluation duration.

[0178] Optionally, before the first evaluation module 201, the device 200 further includes:

[0179] The fourth determining module is used to determine a number of candidate cells, wherein the first quality parameter of each of the candidate cells is greater than or equal to a first threshold.

[0180] The first quality parameter includes at least one of the following:

[0181] Reference signal received power RSRP;

[0182] Reference signal reception quality (RSRQ);

[0183] Signal-to-interference-plus-noise ratio (SINR);

[0184] Signal-to-noise ratio (SNR);

[0185] Timing deviation TO;

[0186] The R value is determined based on RSRP, RSRQ, and TO;

[0187] The S-value is determined based on RSRP, RSRQ, and TO.

[0188] Optionally, the N cells include the terminal's current serving cell and the neighboring cells of the serving cell.

[0189] Optionally, the fourth determining module includes:

[0190] The acquisition unit is used to acquire K first quality parameters of the fourth cell in K different time periods, wherein the fourth cell is any one of the N cells, and K is a positive integer greater than 1;

[0191] The determining unit is configured to determine the fourth cell as one of the candidate cells when at least one of the K first quality parameters is greater than the first threshold.

[0192] The cell reselection device 200 provided in this application embodiment can realize all the processes that can be realized in the cell reselection method embodiment of this application, and achieve the same beneficial effects. To avoid repetition, it will not be described again here.

[0193] This application provides an electronic device. For example... Figure 4 As shown, the electronic device 300 includes a processor 301, a memory 302, and a computer program stored in the memory 302 and executable on the processor. The various components of the electronic device 300 are coupled together via a bus system 303. It is understood that the bus system 303 is used to enable communication between these components.

[0194] The processor 301 is used for:

[0195] If there is a first candidate cell and the number of the first candidate cells is greater than a first preset value, the signal quality of the first candidate cell is evaluated for a first evaluation time. The first candidate cell is a cell whose second quality parameter meets the first preset condition. The first evaluation time is less than the preset evaluation time.

[0196] Based on the evaluation results of the signal quality assessment, a target cell is selected from the first candidate cells. Optionally, the processor 301 is further configured to:

[0197] If the first candidate cell does not exist, or if the first candidate cell exists but the number of the first candidate cells is not greater than the first preset value, and if the second candidate cell exists and the number of the second candidate cell is greater than the second preset value, the signal quality of the second candidate cell is evaluated for a second evaluation time. The second candidate cell is a cell whose second quality parameter meets the second preset condition. The second evaluation time is longer than the first evaluation time and shorter than the preset evaluation time. The cell signal quality requirement corresponding to the second preset condition is lower than the cell signal quality requirement corresponding to the first preset condition.

[0198] Based on the evaluation results of the signal quality assessment, the target cell is selected from the second candidate cells.

[0199] Optionally, the processor 301 is also used for:

[0200] If the first candidate cell does not exist, or if the first candidate cell exists but the number of the first candidate cells is not greater than the first preset value, and if the second candidate cell exists and the number of the second candidate cell is greater than the second preset value, the signal quality of the second candidate cell is evaluated for a second evaluation time. The second candidate cell is a cell whose second quality parameter meets the second preset condition. The second evaluation time is longer than the first evaluation time and shorter than the preset evaluation time. The cell signal quality requirement corresponding to the second preset condition is lower than the cell signal quality requirement corresponding to the first preset condition.

[0201] Based on the evaluation results of the signal quality assessment, the target cell is selected from the second candidate cells.

[0202] Optionally, processor 301 is also used for:

[0203] If there is no first candidate cell or the first candidate cell exists but the number of the first candidate cells is not greater than the first preset value, if there is no second candidate cell or the second candidate cell exists but the number of the second candidate cells is not greater than the second preset value, and if there is a third candidate cell and the number of the third candidate cells is greater than the third preset value, the signal quality of the third candidate cell is evaluated for a third evaluation duration, the third evaluation duration is longer than the second evaluation duration, the third candidate cell is a cell whose second quality parameter meets the third preset condition, and the signal quality requirement of the cell corresponding to the third preset condition is lower than the signal quality requirement of the cell corresponding to the second preset condition;

[0204] Based on the evaluation results of the signal quality assessment, a target cell is selected from at least one third candidate cell.

[0205] Optionally, the second quality parameter includes a first R difference, which is the difference between the R value at the current time and the R value at a first time, where the first time is a historical time prior to the current time.

[0206] The first preset condition includes the first R difference being located within a first preset interval.

[0207] And / or, the second quality parameter further includes a first TO difference, which is the difference between the TO value at the current time and the TO value at the second time, where the second time is a historical time prior to the current time;

[0208] The first preset condition includes that the first R difference is located in the first preset interval, and the first TO difference corresponding to the first R difference is located in the second preset interval.

[0209] Optionally, the second quality parameter includes a first R difference and a second R difference, wherein the first R difference is the difference between the R value at the current time and the R value at the first time, and the second R difference is the difference between the R value at the first time and the R value at the third time, wherein the third time is the time before the first time.

[0210] The second preset condition includes either the first R difference or the second R difference being located within a third preset interval;

[0211] or,

[0212] The second quality parameter includes a second TO difference and a third TO difference. The second TO difference is the difference between the TO value at the current time and the TO value at the fourth time. The third TO difference is the difference between the TO value at the fourth time and the TO value at the fifth time. The fourth time is a historical time before the current time, and the fifth time is a time before the fourth time.

[0213] The second preset condition includes the second TO difference or the third TO difference being located in the fourth preset interval.

[0214] Optionally, the second quality parameter includes a signal stability value, which includes the average of the absolute values ​​of at least two R differences, wherein the at least two R differences correspond to different time periods, and the R difference is the difference between the R values ​​at two different times.

[0215] Processor 301 is also used for:

[0216] For each cell in the first candidate cells:

[0217] Determine whether the stable value of the signal is less than the first stable signal threshold;

[0218] When the signal stability value is less than the first signal stability threshold, a times the preset evaluation time of the first candidate cell corresponding to the signal stability value is determined as the first evaluation time of the first candidate cell corresponding to the signal stability value, where a is a real number greater than 0 and less than 1.

[0219] When the signal stability value is greater than or equal to the first signal stability threshold, b times the preset evaluation time of the first candidate cell corresponding to the signal stability value is determined as the first evaluation time of the first candidate cell corresponding to the signal stability value, where b is a real number greater than a and less than 1.

[0220] The first candidate cell is evaluated using the first evaluation duration corresponding to the first candidate cell.

[0221] Optionally, the second quality parameter includes a signal stability value, which includes the average of the absolute values ​​of at least two R differences, the at least two R differences corresponding to different time periods, and the R difference is the difference between the R values ​​at two different times.

[0222] Processor 301 is also used for:

[0223] For each second candidate cell:

[0224] Determine whether the stable value of the signal is less than the second stable threshold;

[0225] When the signal stability value is less than the second signal stability threshold, i times the preset evaluation time corresponding to the second candidate cell is determined as the second evaluation time of the second candidate cell, where i is a real number greater than 0 and less than 1;

[0226] When the signal stability value is greater than or equal to the second signal stability threshold, j times the preset evaluation time corresponding to the second candidate cell is determined as the second evaluation time of the second candidate cell, where j is a real number greater than i and less than 1;

[0227] The signal quality of the second candidate cell is evaluated using the corresponding second evaluation duration.

[0228] Optionally, processor 301 is also used for:

[0229] A number of candidate cells are determined, wherein the first quality parameter of each of the candidate cells is greater than or equal to a first threshold.

[0230] The first quality parameter includes at least one of the following:

[0231] Reference signal received power RSRP;

[0232] Reference signal reception quality (RSRQ);

[0233] Signal-to-interference-plus-noise ratio (SINR);

[0234] Signal-to-noise ratio (SNR);

[0235] Timing deviation TO;

[0236] The R value is determined based on RSRP, RSRQ, and TO;

[0237] The S-value is determined based on RSRP, RSRQ, and TO.

[0238] Optionally, the N cells include the terminal's current serving cell and the neighboring cells of the serving cell.

[0239] Optionally, processor 301 is also used for:

[0240] Obtain K first quality parameters of the fourth cell in K different time periods, where the fourth cell is any one of the N cells and K is a positive integer greater than 1;

[0241] If at least one of the K first quality parameters is greater than the first threshold, the fourth cell is determined as one of the candidate cells.

[0242] The electronic device 300 provided in this application embodiment can realize the present application and Figure 1 The various processes that can be implemented in the corresponding cell reselection method embodiments, and the same beneficial effects, will not be described again here to avoid repetition.

[0243] This application also provides a computer-readable storage medium storing a computer program. When executed by a processor, this computer program implements the various processes of the above-described cell reselection method embodiments and achieves the same technical effects. To avoid repetition, it will not be described again 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, etc.

[0244] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A cell reselection method, characterized by, The method comprises: In the case that the first candidate cell exists and the number of the first candidate cell is greater than a first preset value, performing signal quality evaluation on the first candidate cell for a first evaluation duration, the first candidate cell being a cell whose second quality parameter meets a first preset condition, and the first evaluation duration being less than a preset evaluation duration; Selecting a target cell from the first candidate cell based on the evaluation result of the signal quality evaluation; The second quality parameter comprises a first R difference value, the first R difference value being a difference between an R value at a current time and an R value at a first time, the first time being a historical time before the current time; The first preset condition comprises that the first R difference value is in a first preset interval; And / or, The second quality parameter comprises a first TO difference value, the first TO difference value being a difference between a TO value at a current time and a TO value at a second time, the second time being a historical time before the current time; The first preset condition comprises that a first TO difference value corresponding to the first R difference value is in a second preset interval.

2. The method of claim 1, wherein, The method further comprises: In the case that the first candidate cell does not exist or exists but the number of the first candidate cell is not greater than the first preset value, and a second candidate cell exists and the number of the second candidate cell is greater than a second preset value, performing signal quality evaluation on the second candidate cell for a second evaluation duration, the second candidate cell being a cell whose second quality parameter meets a second preset condition, the second evaluation duration being greater than the first evaluation duration and less than the preset evaluation duration, and the second preset condition corresponding to a lower cell signal quality requirement than the first preset condition; Selecting a target cell from the second candidate cell based on the evaluation result of the signal quality evaluation.

3. The method of claim 2, wherein, The second quality parameter comprises a first R difference value and a second R difference value, the first R difference value being a difference between an R value at a current time and an R value at a first time, and the second R difference value being a difference between the R value at the first time and an R value at a third time, the third time being a time before the first time; The second preset condition comprises that the first R difference value or the second R difference value is in a third preset interval; Or, The second quality parameter comprises a second TO difference value and a third TO difference value, the second TO difference value being a difference between a TO value at a current time and a TO value at a fourth time, and the third TO difference value being a difference between the TO value at the fourth time and a TO value at a fifth time, the fourth time being a historical time before the current time, and the fifth time being a time before the fourth time; The second preset condition comprises that the second TO difference value or the third TO difference value is in a fourth preset interval.

4. The method of claim 1, wherein, The second quality parameter comprises a signal stability value, the signal stability value comprising an average value of absolute values of at least two R difference values, the at least two R difference values corresponding to different time periods, and the R difference value being a difference between R values at two different times; The method further comprises: For each first candidate cell: determining whether the signal stability value is less than a first signal stability threshold value; in a case where the signal stability value is less than the first signal stability threshold value, determining a first evaluation time length of the first candidate cell as a times of a preset evaluation time length corresponding to the first candidate cell, a being a real number greater than 0 and less than 1; in a case where the signal stability value is greater than or equal to the first signal stability threshold value, determining the first evaluation time length of the first candidate cell as b times of the preset evaluation time length corresponding to the first candidate cell, b being a real number greater than a and less than 1; performing signal quality evaluation on the first candidate cell for the corresponding first evaluation time length.

5. The method of claim 2, wherein, The second quality parameter includes a signal stability value, the signal stability value including an average value of absolute values of at least two R difference values, the at least two R difference values corresponding to different time periods, the R difference value being a difference between R values at two different time points; The signal quality evaluation on the second candidate cell for the second evaluation time length includes: For each second candidate cell: determining whether the signal stability value is less than a second signal stability threshold value; in a case where the signal stability value is less than the second signal stability threshold value, determining a second evaluation time length of the second candidate cell as i times of a preset evaluation time length corresponding to the second candidate cell, i being a real number greater than 0 and less than 1; in a case where the signal stability value is greater than or equal to the second signal stability threshold value, determining the second evaluation time length of the second candidate cell as j times of the preset evaluation time length corresponding to the second candidate cell, j being a real number greater than i and less than 1; performing signal quality evaluation on the second candidate cell for the corresponding second evaluation time length.

6. The method of claim 1, wherein, Before the signal quality evaluation on the first candidate cell for the first evaluation time length in a case where the first candidate cell exists and a quantity of the first candidate cells is greater than a first preset value, the method further includes: determining a plurality of candidate cells, a first quality parameter of each cell in the plurality of candidate cells being greater than or equal to a first threshold value; The first quality parameter includes at least one of the following: reference signal received power (RSRP); reference signal received quality (RSRQ); signal to interference and noise ratio (SINR); signal to noise ratio (SNR); timing offset (TO); an R value determined according to RSRP, RSRQ and TO; an S value determined according to RSRP, RSRQ and TO.

7. A cell reselection apparatus, characterized by comprising: includes: a first evaluation module configured to perform signal quality evaluation on the first candidate cell for a first evaluation time length in a case where the first candidate cell exists and a quantity of the first candidate cells is greater than a first preset value, the first candidate cell being a cell whose second quality parameter satisfies a first preset condition, and the first evaluation time length being less than a preset evaluation time length; a first determination module configured to select a target cell from the first candidate cell based on an evaluation result of the signal quality evaluation; The second quality parameter includes a first R difference value, the first R difference value being a difference between an R value at a current time point and an R value at a first time point, the first time point being a historical time point before the current time point. The first preset condition comprises that the first R difference value is located in a first preset interval. And / or, The second quality parameter comprises a first TO difference value, the first TO difference value being a difference between a TO value at a current moment and a TO value at a second moment, the second moment being a historical moment before the current moment. The first preset condition comprises that a first TO difference value corresponding to the first R difference value is located in a second preset interval.

8. An electronic device, comprising: A computer program product comprising a processor, a memory, and a computer program stored on the memory and loadable on the processor, the computer program implementing the steps of the cell reselection method according to any one of claims 1 to 6 when executed by the processor.

9. A readable storage medium, characterized by, A readable storage medium having a program stored thereon, the program implementing the steps of the cell reselection method according to any one of claims 1 to 6 when executed by a processor.

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