CN109862598B - Cell reselection method, device and computer readable storage medium - Google Patents
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Abstract
The disclosure provides a cell reselection method, a cell reselection device and a computer-readable storage medium, and relates to the technical field of wireless communication. The cell reselection method comprises the following steps: acquiring current reference signal received strength RSRP and current reference signal received quality RSRQ of a serving cell; determining a cell selection receiving level according to the current RSRP and comparing the cell selection receiving level with a same-frequency measurement starting power threshold; when the cell selection receiving level is larger than the same-frequency measurement starting power threshold, determining whether to start the same-frequency adjacent cell measurement or not based on a preset strategy according to the current RSRQ; and under the condition that the same-frequency neighbor cell measurement is determined to be started, selecting a serving cell according to a cell reselection criterion and residing. By the method, the timing of cell reselection can be determined by comprehensively considering the RSRP and the RSRQ, and the accuracy of cell reselection starting timing selection is improved.
Description
Technical Field
The present disclosure relates to the field of wireless communications technologies, and in particular, to a cell reselection method, apparatus, and computer-readable storage medium.
Background
The NB-IoT (Narrow Band Internet of Things) R13 standard supports the cell selection method:
Srxlev>0 and Squal＞0
Srxlev＝Qrxlevmeas-Qrxlevmin-Pcompensation-Qoffsettemp (1)
Squal＝Qqualmeas-Qqualmin-Qoffsettemp (2)
Wherein S isrxlevSelection of reception level, Q, for a cellrxlevmeasActual value of cell RSRP (Reference Signal Receiving Power), P, measured for a terminalcompensationIs the minimum received level, Q, of the celloffsettempFor level compensation value, SqualSelecting quality, Q, for a cellqualmeasFor measured cell RSRQ (Reference Signal Receiving Quality)Signal received quality) actual value, QqualminFor minimum cell signal quality value, QoffsettempIs a mass compensation value.
The cell reselection method comprises the following steps:
a UE (User Equipment, User terminal) can perform cell reselection after camping in a serving cell for more than 1 s;
when serving cell Srxlev＞SIntraSearchPThe UE can not carry out the same-frequency measurement; when serving cell Srxlev＞SNoIntraSearchPThe UE may not perform inter-frequency measurements, wherein SIntraSearchPStarting a power threshold for co-frequency measurements, SNoIntraSearchPStarting a power threshold for non-co-frequency measurement;
s of the measured local cell and the adjacent cellrxlevAnd (3) carrying out R criterion sequencing, and selecting the cell with the maximum R as a serving cell to camp again:
Rs＝Qmeas,s+QHyst-Qoffsettemp (3)
Rn＝Qmean,s-Qoffset-Qoffsettemp (4)
wherein R issIs R value, Q of the serving cellmeas,sReceiving signal quality measurements, Q, for a serving cellHystFor cell reselection hysteresis, RnIs R value, Q of a neighbor cellmean,sReceiving signal quality measurements, Q, for neighboring cellsoffsetThe difference in the received signal quality requirements for the two cells.
SIntraSearchPThe parameter setting is still consistent with LTE (Long Term Evolution), (0-31) stands for (0dB,62dB), but NB-IoT performs coverage enhancement, RS transmitting power is increased, and Q isrxlevminThe drop from-140 dBm to-156 dBm results in the outdoor UE serving cell SrxlevIf the cell reselection threshold is greater than the measurement threshold, the terminal does not perform neighbor cell measurement although there is a stronger neighbor cell, and the terminal does not reside in the strongest cell all the time, so that the cell reselection is too late, and further the service experience is influenced.
Disclosure of Invention
The inventors have found that the measurement threshold S is extended in the related artintrasearchPAnd (0-63), representing (0dB,126dB), the problem that the measurement of the adjacent cell of the outdoor cell edge terminal is too late can be solved, but the increase of the threshold can cause the indoor terminal near the midpoint of the cell to perform unnecessary measurement too early, and the power consumption is increased.
It is an object of the present disclosure to improve the accuracy of cell reselection start occasions.
According to an aspect of the present disclosure, a cell reselection method is provided, including: acquiring the current RSRP and the current RSRQ of a serving cell; determining a cell selection receiving level according to the current RSRP and comparing the cell selection receiving level with a same-frequency measurement starting power threshold; when the cell selection receiving level is larger than the same-frequency measurement starting power threshold, determining whether to start the same-frequency adjacent cell measurement or not based on a preset strategy according to the current RSRQ; and under the condition that the same-frequency neighbor cell measurement is determined to be started, selecting a serving cell according to a cell reselection criterion and residing.
Optionally, the predetermined policy comprises: and determining the cell selection quality according to the current RSRQ, and starting the same-frequency adjacent cell measurement when the cell selection quality is less than or equal to the same-frequency measurement starting quality threshold.
Optionally, the predetermined policy comprises: comparing the current RSRQ with an initial RSRQ of a serving cell, wherein the initial RSRQ is the RSRQ of the serving cell when the terminal is switched to the serving cell; and if the current RSRQ is lower than the initial RSRQ and reaches a preset difference value, starting the same-frequency adjacent cell measurement.
Optionally, the common-frequency measurement starting quality threshold includes a common-frequency measurement starting power threshold of the stationary terminal and a common-frequency measurement starting power threshold of the mobile terminal; and selecting a corresponding same-frequency measurement starting power threshold according to the motion state of the terminal.
Optionally, the method further comprises: and when the cell selection receiving level is less than or equal to the same-frequency measurement starting power threshold, starting the same-frequency adjacent cell measurement.
By the method, the time for cell reselection can be determined by comprehensively considering the RSRP and the RSRQ, the problem of too late cell reselection caused by enhanced coverage of the base station is solved, the problem that power consumption is increased by performing unnecessary measurement on the indoor terminal near the middle point of the cell too early due to threshold increase is also avoided, and the accuracy of cell reselection starting time selection is improved.
According to another aspect of the present disclosure, a cell reselection apparatus is provided, including: a data acquisition unit configured to acquire a current RSRP and a current RSRQ of a serving cell; the cell reselection judging unit is configured to determine a cell selection receiving level according to the current RSRP and compare the cell selection receiving level with a same-frequency measurement starting power threshold; when the cell selection receiving level is larger than the same-frequency measurement starting power threshold, determining whether to start the same-frequency adjacent cell measurement or not based on a preset strategy according to the current RSRQ; and the cell reselection unit is configured to select a serving cell according to the cell reselection criterion and camp on the serving cell under the condition that the same-frequency neighbor cell measurement is determined to be started.
Optionally, the predetermined policy comprises: and determining the cell selection quality according to the current RSRQ, and starting the same-frequency adjacent cell measurement when the cell selection quality is less than or equal to the same-frequency measurement starting quality threshold.
Optionally, the predetermined policy comprises: comparing the current RSRQ with an initial RSRQ of a serving cell, wherein the initial RSRQ is the RSRQ of the serving cell when the terminal is switched to the serving cell; and if the current RSRQ is lower than the initial RSRQ and reaches a preset difference value, starting the same-frequency adjacent cell measurement.
Optionally, the common-frequency measurement starting power threshold includes a common-frequency measurement starting power threshold of a stationary terminal and a common-frequency measurement starting power threshold of a mobile terminal; the cell reselection judging unit is also configured to select a corresponding same-frequency measurement starting power threshold according to the motion state of the terminal.
Optionally, the cell reselection judging unit is further configured to start the same-frequency neighboring cell measurement when the cell selection reception level is less than or equal to a same-frequency measurement start power threshold.
According to still another aspect of the present disclosure, a cell reselection apparatus is provided, including: a memory; and a processor coupled to the memory, the processor configured to perform any of the cell reselection methods mentioned above based on instructions stored in the memory.
The cell reselection device can comprehensively consider RSRP and RSRQ to determine the cell reselection time, overcomes the problem of too late cell reselection caused by enhanced base station coverage, also avoids the problem of power consumption improvement caused by increasing threshold and unnecessary measurement carried out by the cell near-midpoint indoor terminal too early, and improves the accuracy of cell reselection starting time selection.
According to yet another aspect of the present disclosure, a computer-readable storage medium is proposed, on which computer program instructions are stored, which instructions, when executed by a processor, implement any of the above mentioned cell reselection methods.
The computer readable storage medium can comprehensively consider RSRP and RSRQ to determine the cell reselection time by executing the instructions on the computer readable storage medium, so that the problem of too late cell reselection caused by base station coverage enhancement is solved, the problem that unnecessary measurement is carried out by an indoor terminal near a middle point of a cell too early and power consumption is improved due to threshold improvement is also avoided, and the accuracy of cell reselection starting time selection is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:
fig. 1 is a flowchart of an embodiment of a cell reselection method of the present disclosure.
Fig. 2A is a flowchart of an embodiment of a predetermined policy in the cell reselection method of the present disclosure.
Fig. 2B is a flowchart of another embodiment of a predetermined policy in the cell reselection method of the present disclosure.
Fig. 3 is a schematic diagram of changes of indoor and outdoor RSRP and RSRQ.
Fig. 4 is a flowchart of another embodiment of a cell reselection method of the present disclosure.
Fig. 5 is a schematic diagram of an embodiment of a cell reselection apparatus according to the present disclosure.
Fig. 6 is a schematic diagram of another embodiment of a cell reselection apparatus according to the present disclosure.
Fig. 7 is a schematic diagram of a cell reselection apparatus according to another embodiment of the disclosure.
Detailed Description
The technical solution of the present disclosure is further described in detail by the accompanying drawings and examples.
A flow diagram of one embodiment of a cell reselection method of the present disclosure is shown in fig. 1.
In step 101, a current RSRP and a current RSRQ of a serving cell are obtained. In one embodiment, the terminal may perform real-time measurement to obtain the current RSRP and the current RSRQ of the serving cell.
In step 102, a cell selection receive level S is determined based on the current RSRPrxlev. In one embodiment, the cell selection reception level S may be determined by the method shown in equation 1rxlev。
In step 103, the cell selection receiving level and the same frequency measurement starting power threshold S are setIntraSearchPAnd (6) comparing. If the cell selection reception level is greater than the intra-frequency measurement starting power threshold, step 104 is executed. In one embodiment, if the cell selection reception level is not greater than the same-frequency measurement starting power threshold, the same-frequency neighbor cell measurement is started.
In step 104, co-frequency neighbor cell measurement is determined to be initiated based on a predetermined policy according to the current RSRQ. The predetermined strategy may include comparing the current RSRQ with a predetermined value, or comparing the current RSRQ after performing sorting operation with the predetermined value to determine whether to start the same-frequency neighbor cell measurement.
In step 105, if it is determined in step 104 that the co-frequency neighbor cell measurement is started, a serving cell is selected according to a cell reselection criterion and camped. In one embodiment, RSRP of the cell and the neighboring cell may be measured, and the measured S may be measuredrxlevAnd sorting according to the R criterion, and selecting the cell with the maximum R as a serving cell for re-residing.
By the method, the time for cell reselection can be determined by comprehensively considering the RSRP and the RSRQ, the problem of too late cell reselection caused by enhanced coverage of the base station is solved, the problem that power consumption is increased by performing unnecessary measurement on the indoor terminal near the middle point of the cell too early due to threshold increase is also avoided, and the accuracy of cell reselection starting time selection is improved.
A flow chart of one embodiment of the predetermined policy in the cell reselection method of the present disclosure is shown in fig. 2A.
In step 201, a cell selection quality S is determined from the current RSRQqual. In one embodiment, the method shown in equation 2 may be used to determine the cell selection quality Squal。
In step 202, the cell selection quality S is setqualStarting quality threshold S for measurement with same frequencyIntraSearchQBy comparison, if the cell selection quality SqualLess than or equal to same frequency measurement starting quality threshold SIntraSearchQIf yes, go to step 203; if cell selection quality SqualGreater than the same frequency measurement starting quality threshold SIntraSearchQThen step 204 is performed.
In step 203, the same-frequency neighbor cell measurement is started, and a serving cell is selected according to a cell reselection criterion and camped.
In step 204, co-frequency neighbor cell measurements are not initiated.
By the method, RSRQ measurement can be carried out by adopting a measurement criterion similar to a traditional mobile network. As shown in fig. 3, the influence of the neighboring cell interference on the RSRQ is more obvious than the influence of the RSRP, so that the RSRQ is taken into consideration of cell reselection start, which can be more sensitive to the interference of the neighboring cell, and the cell reselection can be triggered by the deterioration of the RSRQ under a better RSRP condition, thereby improving the accuracy of cell reselection start timing selection.
A flow chart of another embodiment of the predetermined strategy in the cell reselection method of the present disclosure is shown in fig. 2B.
In step 211, an initial RSRQ of the serving cell is obtained. In one embodiment, when a terminal switches a serving cell, the RSRQ of the serving cell is obtained and stored as an initial RSRQ.
In step 212, comparing the current RSRQ with the initial RSRQ of the serving cell, and if the current RSRQ is lower than the initial RSRQ of the serving cell by a predetermined difference, performing step 213; if the current RSRQ is lower than the initial RSRQ of the serving cell by not reaching the predetermined difference, step 214 is performed. For example, the predetermined difference is XdB, and X is a positive number. When the initial RSRQ-current RSRQ is not less than XdB, executing step 213; otherwise, step 214 is performed.
In step 213, the same-frequency neighbor cell measurement is started, and the serving cell is selected according to the cell reselection criterion and camped.
In step 214, no co-frequency neighbor cell measurements are initiated.
The method is suitable for the occasions with higher RSRP and lower RSRQ, such as relatively stronger outdoor coverage level, large interference and lower signal quality (in order to achieve the purpose of penetrating indoors, the outdoor partial area is over-covered, the interference is large, and the RSRQ is reduced). By setting the relative threshold, the method can adapt to the actual situation of each cell, sense the change situation of the serving cell signal, quickly start measurement and reselect the optimal cell as soon as possible.
In one embodiment, since the terminal is in a static and moving condition as shown in fig. 3, the variation conditions of RSRP and RSRQ are not the same; under the condition that the terminal moves, the terminal is easier to switch among coverage areas of different cells, so that different same-frequency measurement starting power thresholds can be set for the terminals in different moving states, the mobile terminal can more easily perform cell reselection, and the accuracy of cell reselection starting time selection is improved.
In another embodiment, different co-frequency measurement starting quality thresholds can be configured for terminals in different motion states, or different preset difference values that the current RSRQ is lower than the initial RSRQ of the serving cell, so that the terminals in different motion states can be further treated differently, and the accuracy of cell reselection starting opportunity selection is improved.
A flow chart of yet another embodiment of the cell reselection method of the present disclosure is shown in fig. 4.
In step 401, the current RSRP and the current RSRQ of the serving cell are obtained.
In step 402, a cell selection receive level S is determined from the current RSRPrxlev。
In step 403, the motion state of the terminal is determined. In one embodiment, the motion state of the terminal may be determined by a terminal location method; in another embodiment, the motion state of the terminal may also be measured using an element (e.g., a gyroscope) inside the terminal that measures the motion state of the terminal.
In step 404, a corresponding same-frequency measurement starting power threshold is selected according to the motion state of the terminal. In one embodiment, the starting power thresholds of the co-frequency measurement corresponding to the stationary and moving terminals are different. In another embodiment, for a mobile terminal, different intra-frequency measurement starting power thresholds can be set according to the moving rate of the terminal. In yet another embodiment, different on-frequency measurement start power thresholds can be set according to the influence of surrounding environment (such as occlusion, pedestrian flow) or signal fluctuation.
In step 405, the cell selection reception level is compared to the determined intra-frequency measurement initiation power threshold. If the cell selection receiving level is greater than the same frequency measurement starting power threshold, executing step 407; if the cell selection reception level is not greater than the intra-frequency measurement starting power threshold, step 406 is executed.
In step 406, co-frequency neighbor cell measurement is initiated, and a serving cell is selected according to a cell reselection criterion and camped.
In step 407, it is determined whether to initiate co-frequency neighbor cell measurement based on a predetermined policy according to the current RSRQ. In one embodiment, the predetermined policy may be any one of the predetermined policies described above (e.g., fig. 2).
In step 408, in case it is determined that the co-frequency neighbor cell measurement is initiated, a serving cell is selected according to cell reselection criteria and camped.
By the method, the RSRQ can be judged on the basis of judging whether the same-frequency adjacent cell measurement is started according to the RSRP, and different threshold values are set according to different motion states of the terminal and different environments in which the terminal is located, so that the accuracy and the self-adaptive capacity of cell reselection starting opportunity selection are further improved.
A schematic diagram of one embodiment of a cell reselection apparatus of the present disclosure is shown in fig. 5. The data acquisition unit 501 can acquire the current RSRP and the current RSRQ of the serving cell. In one embodiment, the terminal may perform real-time measurement to obtain a current RSRP and a current RSRQ of a serving cell of the terminal.
The cell reselection judging unit 502 can determine the cell selection reception level S according to the current RSRPrxlevAnd starting power threshold S for cell selection receiving level and co-frequency measurementIntraSearchPAnd comparing, if the cell selection receiving level is greater than the same-frequency measurement starting power threshold, determining to start the same-frequency adjacent cell measurement based on a predetermined strategy according to the current RSRQ. In one embodiment, the predetermined policy may include comparing the current RSRQ with a predetermined value, or comparing the current RSRQ with a predetermined value after performing a sorting operation, to determine whether to initiate a co-frequency neighbor cell measurement. In an embodiment, the cell reselection determination unit 502 may perform the intra-frequency neighbor cell measurement initiation determination by using the predetermined strategy in the embodiments shown in fig. 2A and 2B.
The cell reselection unit 503 is capable of selecting a serving cell according to a cell reselection criterion and camping on the serving cell when the cell reselection determination unit 502 determines to start the co-frequency neighbor cell measurement. In one embodiment, RSRP of the cell and the neighboring cell may be measured, and the measured S may be measuredrxlevAnd sorting according to the R criterion, and selecting the cell with the maximum R as a serving cell for re-residing.
The cell reselection device can comprehensively consider RSRP and RSRQ to determine the cell reselection time, overcomes the problem of too late cell reselection caused by enhanced base station coverage, also avoids the problem of power consumption improvement caused by increasing threshold and unnecessary measurement carried out by the cell near-midpoint indoor terminal too early, and improves the accuracy of cell reselection starting time selection.
In an embodiment, the cell reselection determining unit 502 determines to start the measurement of the same-frequency neighboring cell when it is determined that the cell selection receiving level is less than or equal to the same-frequency measurement starting power threshold, so that the determination process can be simplified and the timely handover of the serving cell can be realized when the RSRP meets the cell reselection requirement.
In an embodiment, the cell reselection determining unit 502 may select different co-frequency measurement starting power thresholds according to a stationary or moving state of the terminal, so that the cell reselection meets a requirement of a moving state of the terminal, and accuracy of cell reselection starting time selection is improved. In another embodiment, the cell reselection determining unit 502 may further select different co-frequency measurement starting quality thresholds for terminals in different motion states, or different predetermined difference values that the current RSRQ is lower than the initial RSRQ of the serving cell, so that the terminals in different motion states may be further treated differently, and accuracy and adaptive capability of cell reselection starting opportunity selection are improved.
A schematic structural diagram of an embodiment of the cell reselection apparatus of the present disclosure is shown in fig. 6. The cell reselection means comprises a memory 610 and a processor 620. Wherein: the memory 610 may be a magnetic disk, flash memory, or any other non-volatile storage medium. The memory is for storing instructions in the corresponding embodiments of the cell reselection method hereinabove. Processor 620 is coupled to memory 610 and may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 620 is configured to execute the instructions stored in the memory to enable an improvement in the accuracy of cell reselection start timing selection.
In one embodiment, as also shown in fig. 7, a cell reselection apparatus 700 includes a memory 710 and a processor 720. Processor 720 is coupled to memory 710 by BUS 730. The cell reselection apparatus 700 may also be coupled to an external storage device 750 via a storage interface 740 for invoking external data, and may also be coupled to a network or another computer system (not shown) via a network interface 760. And will not be described in detail herein.
In this embodiment, the accuracy of selecting the cell reselection start timing can be improved by storing the data instruction in the memory and processing the instruction by the processor.
In another embodiment, a computer readable storage medium has stored thereon computer program instructions which, when executed by a processor, implement the steps of the method in the corresponding embodiment of the cell reselection method. As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Thus far, the present disclosure has been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
The methods and apparatus of the present disclosure may be implemented in a number of ways. For example, the methods and apparatus of the present disclosure may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order for the steps of the method is for illustration only, and the steps of the method of the present disclosure are not limited to the order specifically described above unless specifically stated otherwise. Further, in some embodiments, the present disclosure may also be embodied as programs recorded in a recording medium, the programs including machine-readable instructions for implementing the methods according to the present disclosure. Thus, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.
Finally, it should be noted that: the above examples are intended only to illustrate the technical solutions of the present disclosure and not to limit them; although the present disclosure has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will understand that: modifications to the specific embodiments of the disclosure or equivalent substitutions for parts of the technical features may still be made; all such modifications are intended to be included within the scope of the claims of this disclosure without departing from the spirit thereof.
Claims (12)
1. A method of cell reselection, comprising:
acquiring current reference signal received strength RSRP and current reference signal received quality RSRQ of a serving cell;
determining a cell selection receiving level according to the current RSRP and comparing the cell selection receiving level with a same frequency measurement starting power threshold;
when the cell selection receiving level is larger than a same-frequency measurement starting power threshold, determining whether to start the same-frequency adjacent cell measurement based on a predetermined strategy according to the current RSRQ, wherein the predetermined strategy comprises the following steps: determining cell selection quality according to the current RSRQ; when the cell selection quality is less than or equal to a same-frequency measurement starting quality threshold, starting same-frequency adjacent cell measurement;
when the cell selection receiving level is less than or equal to the same-frequency measurement starting power threshold, starting the same-frequency adjacent cell measurement;
and under the condition that the same-frequency neighbor cell measurement is determined to be started, selecting a serving cell according to a cell reselection criterion and residing.
2. The method of claim 1, wherein the predetermined policy further comprises:
comparing the current RSRQ with an initial RSRQ of the serving cell, wherein the initial RSRQ is the RSRQ of the serving cell when the terminal is switched to the serving cell;
and if the current RSRQ is lower than the initial RSRQ and reaches a preset difference value, starting the same-frequency adjacent cell measurement.
3. The method of claim 1, wherein,
the same-frequency measurement starting power threshold comprises a same-frequency measurement starting power threshold of a static terminal and a same-frequency measurement starting power threshold of a moving terminal;
and selecting the corresponding same-frequency measurement starting power threshold according to the motion state of the terminal.
4. The method of claim 2, wherein the predetermined difference is different for different motion states.
5. The method of claim 1, further comprising:
and when the cell selection receiving level is less than or equal to the same-frequency measurement starting power threshold, starting the same-frequency adjacent cell measurement.
6. A cell reselection apparatus comprising:
a data acquisition unit configured to acquire a current reference signal received strength, RSRP, and a current reference signal received quality, RSRQ, of a serving cell;
the cell reselection judging unit is configured to determine a cell selection receiving level according to the current RSRP, compare the cell selection receiving level with a same-frequency measurement starting power threshold, and determine whether to start the same-frequency adjacent cell measurement based on a preset strategy according to the current RSRQ when the cell selection receiving level is greater than the same-frequency measurement starting power threshold; the predetermined policy includes: determining cell selection quality according to the current RSRQ; when the cell selection quality is less than or equal to a same-frequency measurement starting quality threshold, starting same-frequency adjacent cell measurement;
and the cell reselection unit is configured to select a serving cell according to the cell reselection criterion and camp on the serving cell under the condition that the same-frequency neighbor cell measurement is determined to be started.
7. The apparatus of claim 6, wherein the predetermined policy comprises:
comparing the current RSRQ with an initial RSRQ of the serving cell, wherein the initial RSRQ is the RSRQ of the serving cell when the terminal is switched to the serving cell;
and if the current RSRQ is lower than the initial RSRQ and reaches a preset difference value, starting the same-frequency adjacent cell measurement.
8. The apparatus of claim 6, wherein,
the same-frequency measurement starting power threshold comprises a same-frequency measurement starting power threshold of a static terminal and a same-frequency measurement starting power threshold of a moving terminal;
the cell reselection judging unit is further configured to select the corresponding same-frequency measurement starting quality threshold according to the motion state of the terminal.
9. The apparatus of claim 7, wherein the predetermined difference is different for different motion states.
10. The apparatus according to claim 6, wherein the cell reselection determination unit is further configured to start the co-frequency neighbor cell measurement when the cell selection reception level is less than or equal to the co-frequency measurement start power threshold.
11. A cell reselection apparatus comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the method of any of claims 1-5 based on instructions stored in the memory.
12. A computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the method of any one of claims 1 to 5.
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| CN114258110B (en) * | 2020-09-22 | 2024-02-06 | 紫光展锐(重庆)科技有限公司 | Control method and device for triggering reconstruction, storage medium and terminal |
| CN114651479B (en) * | 2020-10-14 | 2023-11-10 | 北京小米移动软件有限公司 | Method, device, communication equipment and storage medium for accessing cell |
| EP4329381A4 (en) * | 2021-04-20 | 2024-05-29 | Beijing Xiaomi Mobile Software Co., Ltd. | Cell reselection method, cell reselection apparatus, and storage medium |
| CN113423126B (en) * | 2021-06-04 | 2022-05-17 | 广州粒子微电子有限公司 | Narrow-band Internet of things terminal cell reselection method and narrow-band Internet of things terminal |
| CN114760666B (en) * | 2022-05-24 | 2024-05-03 | 上海移远通信技术股份有限公司 | Cell reselection method, device, electronic equipment and storage medium |
| CN118265103A (en) * | 2022-12-27 | 2024-06-28 | RealMe重庆移动通信有限公司 | Cell selection method, device, user equipment and storage medium |
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