Method and device for judging residence of reselected cell, chip, chip module and terminal equipment

Abstract

The invention relates to a residence judgment method and device for a reselected cell, a chip, a chip module and terminal equipment. The method comprises the following steps: determining a target reselection cell to be subjected to residence judgment at present in a plurality of reselection cells; under the condition that the PLMN of the target reselection cell does not belong to the equivalent registration PLMN and the signal strength of the current service cell does not reach the standard, other neighbor cells without other available candidate frequencies or target frequencies are legal compliance neighbor cells; if yes, only carrying out residence judgment on other reselection cells except the target reselection cell in the plurality of reselection cells in the set time period, and setting the frequency priority of the target frequency to be lower than the frequency priorities of other frequencies in the set time period; the target frequency is the frequency of the target reselection cell; and under the condition that the PLMN of the target reselection cell belongs to the equivalent registration PLMN, taking the target reselection cell as a resident cell. By adopting the method, the probability of missing to receive the paging message can be reduced.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a method, apparatus, chip, chip module, terminal equipment, computer-readable storage medium, and computer program product for determining cell reselection. Background Technology

[0002] When a terminal device is in an idle or inactive state, and the signal of the current serving cell is degraded, there are better candidate cells for reselection, or the serving cell is unavailable for camping, cell reselection is required.

[0003] In cell reselection scenarios, if the PLMN of the highest priority reselected cell from a certain frequency is not an equivalent registered PLMN, other cells on that frequency will also be unable to be used as reselected cells within a set time period. As a result, the terminal device will remain camped on the current serving cell with poor signal, which may lead to the problem of missing paging messages. Summary of the Invention

[0004] Therefore, it is necessary to provide a method, apparatus, chip, chip module, terminal device, computer-readable storage medium, and computer program product for determining the dwell time of a cell reselection, in order to address the above-mentioned technical problems.

[0005] Firstly, this application provides a method for determining residency in a cell reselection process, including:

[0006] Determine the target cell for which a dwell determination is to be made from a number of cell reselection options;

[0007] If the PLMN of the target reselection cell is not an equivalent registered PLMN and the signal strength of the current serving cell is not up to standard, and there are no other available candidate frequencies or other neighboring cells of the target frequency that are legal and compliant neighboring cells, then within a set time period, only the other reselection cells among a number of reselection cells other than the target reselection cell will be judged for camping, and within the set time period, the frequency priority of the target frequency will be set lower than the frequency priority of other frequencies; the target frequency is the frequency where the target reselection cell is located;

[0008] If the PLMN of the target reselection cell is an equivalent registered PLMN, the target reselection cell will be used as the stationing cell.

[0009] In one embodiment, the method further includes:

[0010] If the PLMN of the target reselection cell is not an equivalent registered PLMN, and the signal strength of the current serving cell meets the standard, or there are other available candidate frequencies, or other neighboring cells of the target frequency are not legitimate and compliant neighboring cells, then within a set time period, a camping determination is made for the reselection cells on other frequencies other than the target frequency among several reselection cells.

[0011] In one embodiment, the method further includes:

[0012] If the signal strength of the current serving cell is lower than the abnormal transmit / receive signal strength threshold, or if the signal strength of the current serving cell is lower than the normal transmit / receive signal strength threshold and the target reselection cell records a "whether co-frequency reselection is allowed" flag indicating that co-frequency reselection is allowed, then the signal strength of the current serving cell is determined to be substandard.

[0013] In one embodiment, the method further includes:

[0014] If a neighboring cell exists in the prior information at the target frequency, the PLMN is an equivalent registered PLMN, and the signal strength is not lower than the normal transmit / receive signal strength threshold, then the neighboring cell is determined to be a legitimate and compliant neighboring cell.

[0015] In one embodiment, determining the target reselection cell for which a dwell determination is to be made among a plurality of reselection cells includes:

[0016] The priority of each reselected cell is obtained based on the frequency priority of the frequency in which each reselected cell is located and the cell reselection ranking value of each reselected cell.

[0017] Based on the priority of each reselection cell, the target reselection cell for which a dwell determination is to be made is determined from among several reselection cells.

[0018] In one embodiment, the method further includes:

[0019] For a given frequency, if, during the reselection phase prior to each cell on that frequency, the PLMN is not identified as a reselection candidate cell for the target core network type because it does not belong to an equivalent registered PLMN, then that frequency is determined to be prohibited due to the PLMN being illegitimate.

[0020] If a frequency is prohibited due to an invalid PLMN, there are no other available candidate frequencies, the current serving cell signal strength is insufficient, a valid and compliant neighboring cell exists for the frequency, and each cell of the frequency meets the reselection criteria except for time requirements, then each cell of the frequency is determined as a reselection candidate cell for that frequency. During the remaining time of the set prohibition period, the frequency priority of the reselection candidate cells of the frequency is lower than the frequency priority of the reselection candidate cells or reselection cells of other frequencies. The set prohibition period is a period during which only the reselection cell on frequencies other than the frequency mentioned above is judged.

[0021] After the time requirement is met, the reselection cell for one frequency is obtained based on the reselection candidate cells for one frequency.

[0022] Secondly, this application also provides a cell reselection dwell determination device, applied to a terminal device, the device comprising:

[0023] The target cell reselection module is used to determine the target cell for which a dwell decision needs to be made among several reselection cells;

[0024] The camping determination module is used to determine the camping status of only the reselection cells other than the target reselection cell within a set time period when the PLMN of the target reselection cell is not an equivalent registered PLMN and the signal strength of the current serving cell is not up to standard, and there are no other available candidate frequencies or other neighboring cells of the target frequency that are legal and compliant neighboring cells.

[0025] The cell-of-stay determination module is used to identify the target reselection cell as the cell of stay when the PLMN of the target reselection cell is an equivalent registered PLMN.

[0026] Thirdly, this application also provides a chip including a processor and a communication interface, the processor being configured to cause the chip to perform the steps of the method provided in the first aspect above.

[0027] Fourthly, this application also provides a chip module, including a communication module, a power module, a storage module, and a chip as described in the third aspect above, wherein:

[0028] The power module is used to provide power to the chip module;

[0029] The storage module is used to store data and instructions;

[0030] The communication module is used for internal communication within the chip module, or for communication between the chip module and external devices.

[0031] Fifthly, this application also provides a terminal device, including the chip as described in the third aspect above, or including the chip module as described in the fourth aspect above.

[0032] Sixthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, the computer program being executed by a processor using the method provided in the first aspect.

[0033] In a seventh aspect, this application also provides a computer program product. The computer program product includes a computer program that is executed by a processor using the method provided in the first aspect.

[0034] The aforementioned cell reselection cell dwell determination method, device, computer equipment, computer-readable storage medium, and computer program product, when the PLMN of the target reselection cell is not an equivalent registered PLMN and the signal strength of the current serving cell is substandard, and there are no other available candidate frequencies or other legal and compliant neighboring cells of the target frequency, will only perform dwell determination on other reselection cells among a set number of reselection cells excluding the target reselection cell within a set time period. Furthermore, within the set time period, the frequency priority of the target frequency is set lower than the frequency priority of other frequencies. This allows dwell determination on other reselection cells of the target frequency excluding the target reselection cell within a set time period, reducing the probability of terminal devices dwelling for extended periods in the current serving cell with poor signal due to the lack of available reselection cells, and reducing the probability of missed paging messages. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is an application environment diagram of the cell reselection dwell determination method in one embodiment;

[0037] Figure 2 This is a flowchart illustrating the cell reselection dwell determination method in one embodiment;

[0038] Figure 3 This is a schematic diagram of the process for measuring and evaluating each cell at each frequency in one embodiment.

[0039] Figure 4 This is a flowchart illustrating processing scheme a in one embodiment;

[0040] Figure 5 This is a flowchart illustrating processing scheme b in one embodiment;

[0041] Figure 6 This is a flowchart illustrating processing scheme c in one embodiment;

[0042] Figure 7 This is a structural block diagram of a cell reselection and dwell determination device in one embodiment;

[0043] Figure 8 This is an internal structure diagram of a chip module in one embodiment. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0045] It should be noted that the terms "first," "second," etc., used in this application can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. The terms "comprising" and "having," and any variations thereof, used in this application, are intended to cover non-exclusive inclusion. The term "multiple" used in this application refers to two or more. The term "and / or" used in this application refers to one of the embodiments, or any combination of multiple embodiments.

[0046] The cell reselection dwell determination method provided in this application embodiment can be applied to, for example, Figure 1In the application environment shown, terminal device 101 communicates with server 102 via a network. A data storage system can store the data that server 102 needs to process. The data storage system can be integrated onto server 102 or placed on a cloud or other network server. Terminal device 101 determines the target reselection cell for which it needs to be camped among several reselection cells. If the PLMN of the target reselection cell is not an equivalent registered PLMN and the signal strength of the current serving cell is substandard, and there are no other available candidate frequencies or other legal and compliant neighboring cells of the target frequency, then within a set time period, it only performs camping judgment on the other reselection cells besides the target reselection cell among the several reselection cells, and sets the frequency priority of the target frequency to be lower than the frequency priority of other frequencies within the set time period to determine the camping cell. Terminal device 101 can be, but is not limited to, various personal computers, laptops, smartphones, tablets, drones, low-altitude aircraft, IoT devices, and portable wearable devices. Server 102 can be an independent physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing cloud computing services.

[0047] In one exemplary embodiment, such as Figure 2 As shown, a method for determining the dwell time of a cell reselection is provided, which is then applied to... Figure 1 Taking terminal device 101 as an example, the explanation includes the following steps S201 to S203. Wherein:

[0048] Step S201: Determine the target cell for which a dwell determination is to be made among several cell reselection options.

[0049] Cell reselection refers to a cell that meets the 3GPP protocol reselection criteria within the time specified in the 3GPP protocol.

[0050] Several cells to be reselected can be cells on different frequencies (with different frequency priorities).

[0051] Among several cell reselection options, the cell corresponding to the frequency with the highest frequency priority can be selected; among the cells corresponding to the frequency with the highest frequency priority, the cell with the highest cell reselection ranking value (R criterion, R value) can be selected as the target cell for the current dwell determination.

[0052] The reselection criteria for 3GPP protocols are as follows:

[0053] Within the same Radio Access Technology (RAT), different frequencies or frequencies from different RATs have absolute priorities. Frequencies with a priority higher than the current service frequency are considered high-priority frequencies, frequencies with the same priority as the current service frequency are considered equal-priority frequencies, and frequencies with a priority lower than the current service frequency are considered low-priority frequencies. For measured cells, a cell reselection evaluation is performed. If multiple neighboring cells on different priority frequencies meet the reselection criteria, the cell with the highest reselection criterion (R value) on the highest priority frequency is selected for reselection. For cells on the same frequency or with equal priority, the R criterion for cell reselection on the same frequency is used. The cell reselection evaluation criteria for different priorities are as follows:

[0054] Cell reselection for high-priority frequency points must meet the following conditions:

[0055] 1) The time spent in the service area exceeds 1 second;

[0056] 2) The reselection criterion is met, that is, the reselection retention value (S criterion, S value) of the high-priority frequency cell is greater than the preset threshold (ThreshX, High: the high-priority reselection threshold value of the neighboring cell).

[0057] 3) The duration for which the reselection criteria are met exceeds the reselection time parameter (TreselectionRAT).

[0058] Cell reselection on the same frequency or with the same priority frequency must meet the following conditions:

[0059] 1) The time spent in the service area exceeds 1 second;

[0060] 2) No high-priority frequency cells meet the reselection criteria;

[0061] 3) The reselection criterion is met, that is, the reselection value of the neighbor cell (R value of neighbor cell, Rn value) of the neighbor cell at the same frequency or with the same priority frequency is better than the reselection value of the serving cell (R value of Serving cell, Rs value).

[0062] 4) The duration for which the reselection criteria are met exceeds the reselection time parameter (TreselectionRAT).

[0063] Cell reselection on low-priority frequencies must meet the following conditions:

[0064] 1) The time spent in the service area exceeds 1 second;

[0065] 2) Cells without high-priority frequencies or cells with the same or equal priority frequencies meet the reselection criteria;

[0066] 3) The reselection criteria are met, that is, the reselection dwell value of the serving cell is less than the preset threshold (ThreshServing, Low: the low priority reselection threshold value of the serving cell), and the reselection dwell value of the neighboring cell with the low priority frequency is greater than the preset threshold (ThreshX, Low: the low priority reselection threshold value of the neighboring cell).

[0067] 4) The duration for which the reselection criteria are met exceeds the reselection time parameter (TreselectionRAT).

[0068] In step S202, if the PLMN of the target reselection cell is not an equivalent registered PLMN and the signal strength of the current serving cell is not up to standard, and there are no other available candidate frequencies or other neighboring cells of the target frequency that are legal and compliant neighboring cells, then within a set time period, only the other reselection cells among the several reselection cells other than the target reselection cell are judged for camping, and within the set time period, the frequency priority of the target frequency is set to be lower than the frequency priority of other frequencies; the target frequency is the frequency where the target reselection cell is located.

[0069] Existing processes (such as reading SIB1 during PLMN search and cell selection) can be used to collect cell information as historical information; the process of adding neighboring cells and reading SIB1 can also be used to collect cell information as historical information; based on the collected historical information, it can be used to check whether the PLMN of the target reselected cell belongs to an equivalent registered PLMN. Here, SIB1 stands for System Information Block Type 1.

[0070] Specifically, the PLMN of the target reselection cell is obtained based on the collected historical information. It is then checked whether the PLMN of the target reselection cell is equal to the PLMN that the terminal device has successfully registered, or whether it exists in the equivalent PLMN list. If either condition is met, the PLMN of the target reselection cell is determined to be an equivalent registered PLMN. If neither condition is met, the PLMN of the target reselection cell is determined not to be an equivalent registered PLMN.

[0071] When the PLMN of the target cell to be reselected is not an equivalent registered PLMN, it can be determined that the target cell to be reselected is not applicable to the target core network type. The target core network type refers to the core network type currently registered / camped by the terminal device executing the cell reselection determination method of this application. PLMN stands for Public Land Mobile Network, and in the cell reselection scenario, PLMN refers to the operator's network number.

[0072] The signal strength of the current serving cell can be determined based on the relationship between the signal strength of the current serving cell and the thresholds for abnormal and normal signal strength.

[0073] When there are no other reselection cells or candidate cells besides the target frequency, it can be determined that there are no other available candidate frequencies.

[0074] Whether a neighboring cell on the target frequency is a legitimate and compliant neighboring cell can be determined based on whether there are neighboring cells in the prior information, whether the PLMN is an equivalent registered PLMN and whether its signal strength is higher than the normal transmit and receive signal strength threshold.

[0075] If the PLMN of the target reselection cell is not an equivalent registered PLMN and the signal strength of the current serving cell is insufficient, and there are no other available candidate frequencies, then within a set time period, only the reselection cells other than the target reselection cell will be considered for camping. Furthermore, within this set time period, the frequency priority of the target frequency will be set lower than that of other frequencies. Therefore, within the set time period, the reselection cells of the target frequency other than the target reselection cell can be considered for camping; that is, the target reselection cell will not be considered for camping within the set time period, and will be excluded from consideration as a reselection cell or a reselection candidate cell. The set time period can be set according to actual conditions; for example, it can be set to 300 seconds.

[0076] If the PLMN of the target reselection cell is not an equivalent registered PLMN and the signal strength of the current serving cell is not up to standard, and other neighboring cells of the target frequency are legal and compliant neighboring cells, then within a set time period, only the other reselection cells among the several reselection cells other than the target reselection cell will be judged for camping. If the frequency priority of the target frequency is set to be lower than the frequency priority of other frequencies within the set time period, then within the set time period, the other reselection cells in the target frequency other than the target reselection cell can be judged for camping. That is, within the set time period, the target reselection cell will not be judged for camping, and the target reselection cell will be excluded within the set time period and will not be considered as a reselection cell or a reselection candidate cell.

[0077] If the PLMN of the target reselection cell is not an equivalent registered PLMN and the signal strength of the current serving cell is not up to standard, and there are no other available candidate frequencies and other neighboring cells of the target frequency are legal and compliant neighboring cells, then within a set time period, only the other reselection cells among the several reselection cells other than the target reselection cell will be judged for camping. If the frequency priority of the target frequency is set to be lower than the frequency priority of other frequencies within the set time period, then within the set time period, the other reselection cells among the target frequency other than the target reselection cell can be judged for camping. That is, within the set time period, the target reselection cell will not be judged for camping. The target reselection cell will be excluded within the set time period and will not be considered as a reselection cell or a reselection candidate cell.

[0078] Step S203: If the PLMN of the target reselection cell is an equivalent registered PLMN, the target reselection cell is designated as the stationing cell.

[0079] When the PLMN of the target reselection cell is an equivalent registered PLMN, it can be determined that the target reselection cell is suitable for the target core network type, and the target reselection cell can be used as the stationed cell.

[0080] In the above-mentioned cell reselection dwell determination method, if the PLMN of the target reselection cell is not an equivalent registered PLMN and the signal strength of the current serving cell is substandard, and there are no other available candidate frequencies or other neighboring cells of the target frequency that are legal and compliant neighboring cells, then dwell determination is performed only on other reselection cells other than the target reselection cell among a number of reselection cells within a set time period. The frequency priority of the target frequency is set to be lower than the frequency priority of other frequencies within the set time period. This allows dwell determination to be performed on other reselection cells of the target frequency other than the target reselection cell within the set time period. This can reduce the probability of the terminal device dwelling on the current serving cell with poor signal for a long time due to the lack of available reselection cells, and can reduce the probability of missing paging messages.

[0081] In one embodiment, the method provided by this application further includes: when the PLMN of the target reselection cell is not an equivalent registered PLMN, and the signal strength of the current serving cell meets the standard, or there are other available candidate frequencies, or other neighboring cells of the target frequency are not legal and compliant neighboring cells, then within a set time period, only the reselection cells on frequencies other than the target frequency among a number of reselection cells are judged to remain in the cell.

[0082] If the PLMN of the target reselection cell is not an equivalent registered PLMN, and the signal strength of the current serving cell meets the standard, indicating that the signal degradation of the current serving cell is low, then the reselection cells on frequencies other than the target frequency can be judged within a set time period. That is, the reselection cells on the target frequency are not judged within the set time period, and the reselection cells on the target frequency are excluded within the set time period and are not considered as reselection cells or reselection candidate cells.

[0083] If the PLMN of the target reselection cell is not an equivalent registered PLMN, and there are other available candidate frequencies, it indicates that there are available reselection cells. In this case, within a set time period, only the reselection cells on frequencies other than the target frequency among a number of reselection cells can be judged for camping. That is, within the set time period, the reselection cells on the target frequency are not judged for camping, and the reselection cells on the target frequency are excluded within the set time period and are not considered as reselection cells or reselection candidate cells.

[0084] If the PLMN of the target reselection cell is not an equivalent registered PLMN, and other neighboring cells on the target frequency are not legitimate and compliant neighboring cells, it indicates that the reselection cell on the target frequency is difficult to be used as a camping cell. In this case, camping judgment can be performed only on reselection cells on frequencies other than the target frequency among a number of reselection cells within a set time period. That is, camping judgment is not performed on reselection cells on the target frequency within the set time period. Reselection cells on the target frequency are excluded within the set time period and are not considered as reselection cells or reselection candidate cells.

[0085] In this embodiment, if the PLMN of the target reselection cell is not an equivalent registered PLMN, the signal strength of the current serving cell meets the standard, or there are other available candidate frequencies, or other neighboring cells of the target frequency are not legitimate and compliant neighboring cells, then within a set time period, only the reselection cells on frequencies other than the target frequency among the several reselection cells are judged for camping. In this way, it is not necessary to judge the reselection cells on the target frequency other than the target reselection cell within the set time period, which can avoid the terminal device repeatedly trying between unavailable cells and reduce invalid reselections.

[0086] In one embodiment, the method provided by this application further includes: determining that the signal strength of the current serving cell is substandard when the signal strength of the current serving cell is lower than the abnormal transmit / receive signal strength threshold, or when the signal strength of the current serving cell is lower than the normal transmit / receive signal strength threshold and the target reselection cell records whether co-frequency reselection is allowed as co-frequency reselection is allowed.

[0087] The threshold for abnormal transmission and reception signal strength can be determined based on the relevant signal parameters that cannot be transmitted or received normally when residing in the serving cell; the threshold for normal transmission and reception signal strength can be determined based on the relevant signal parameters that can be transmitted or received normally when residing in the serving cell.

[0088] If the signal strength of the current serving cell is lower than the abnormal transmit / receive signal strength threshold, then it can be determined that the signal strength of the current serving cell is substandard.

[0089] If the signal strength of the current serving cell is lower than the normal transmit and receive signal strength threshold, and the intraFreqReselection flag recorded by the target reselection cell indicates that intraFreqReselection is allowed, then it can be determined that the signal strength of the current serving cell is substandard.

[0090] In this embodiment, the signal strength of the current serving cell can be determined based on the relationship between the signal strength of the current serving cell and the thresholds for abnormal and normal signal strength, so as to carry out the subsequent cell reselection and retention judgment process.

[0091] In one embodiment, the method provided by this application further includes: determining the neighboring cell as a legitimate and compliant neighboring cell when the neighboring cell on the target frequency exists in the prior information, the PLMN is an equivalent registered PLMN and the signal strength is not lower than the normal transmit and receive signal strength threshold.

[0092] When the PLMN of a neighboring cell on the target frequency is an equivalent registered PLMN, the neighboring cell can be determined to be legitimate; when the neighboring cell on the target frequency exists in the prior information and its signal strength is not lower than the normal transmit / receive signal strength threshold, the neighboring cell can be determined to be compliant; when the neighboring cell on the target frequency is a candidate cell (a cell that meets the reselection criteria specified in the 3GPP protocol, except for time requirements), its PLMN is an equivalent registered PLMN, it is located in the prior information and its signal strength is not lower than the normal transmit / receive signal strength threshold, the neighboring cell can be determined to be a legitimate and compliant neighboring cell.

[0093] In this embodiment, the neighboring cells on the target frequency are determined to be legitimate and compliant based on whether there are neighboring cells in the prior information, whether the PLMN is equivalently registered with the PLMN, and whether the signal strength is lower than the normal transmit and receive signal strength threshold. This is then used to determine whether the neighboring cells on the target frequency are legitimate and compliant, so as to carry out the subsequent cell reselection and retention judgment process.

[0094] In one embodiment, the target cell for the current dwell determination is determined among several reselected cells. The specific steps are as follows: the priority of each reselected cell is obtained according to the frequency priority of the frequency in which each reselected cell is located and the cell reselection ranking value of each reselected cell; the target cell for the current dwell determination is determined among several reselected cells according to the priority of each reselected cell.

[0095] The priority of each cell to be reselected can be determined based on the frequency priority of the frequency in which the cell is located and the cell reselection ranking value of each cell. Specifically, the higher the frequency priority of the cell and the higher the cell reselection ranking value, the higher the priority of the cell to be reselected.

[0096] The highest priority cell can be selected from several cell reselection options and used as the target cell for the current dwell determination.

[0097] In this embodiment, the target reselection cell for the current camping determination is determined from several reselection cells according to the priority of each reselection cell. This allows the terminal device to prioritize the selection of legally available cells, reduce invalid reselections, and improve reselection efficiency.

[0098] In one embodiment, the method provided by this application further includes: for a frequency, if each cell on the frequency was not identified as a reselection candidate cell of the target core network type during the previous reselection phase because the PLMN is not an equivalent registered PLMN, then the frequency is determined to be prohibited due to the PLMN being illegitimate; if the frequency is prohibited due to the PLMN being illegitimate, there are no other available candidate frequencies, the current serving cell signal strength is substandard, the frequency has legitimate and compliant neighboring cells, and each cell on the frequency meets the reselection criteria except for the time requirement, then each cell on the frequency is determined as a reselection candidate cell of the frequency; wherein, during the remaining time of the set prohibition period, the frequency priority of the reselection candidate cell of the frequency is lower than the frequency priority of the reselection candidate cell or the reselection cell of other frequencies; the set prohibition period is the period during which only the camping judgment is performed on the reselection cells on frequencies other than the frequency mentioned above; after the time requirement is met, the reselection cell of the frequency is obtained based on the reselection candidate cell of the frequency.

[0099] If each cell on frequency A was not identified as a candidate cell for reselection of the target core network type during the previous reselection phase because the PLMN is not an equivalent registered PLMN, then frequency A can be determined to be prohibited due to the PLMN being illegitimate.

[0100] When frequency A is prohibited due to an illegal PLMN, there are no other available candidate frequencies, the signal strength of the current serving cell is substandard, frequency A has legal and compliant neighboring cells, and each cell of frequency A meets the reselection criteria except for the time requirement, each cell of frequency A can be determined as a reselection candidate cell of frequency A.

[0101] Within the specified prohibition period, the frequency priority of candidate cells for frequency A is lower than that of candidate cells or cells for other frequencies. The prohibition period is defined as the time during which cell retention decisions are made only for cells on frequencies other than A; that is, the prohibition period is the time during which cell retention decisions are not made for cells on frequency A. For example, the frequency priority of candidate cells for frequency A can be set to the lowest priority during the remaining time of the prohibition period. The prohibition period can be set according to actual conditions; for example, it can be set to 300 seconds.

[0102] After meeting the time requirements, the reselection cells for frequency A are obtained based on the reselection candidate cells for frequency A.

[0103] In this embodiment, when a frequency is prohibited due to an invalid PLMN, there are no other available candidate frequencies, the signal strength of the current serving cell is substandard, there are legal and compliant neighboring cells for the frequency, and each cell of the frequency meets the reselection criteria except for time requirements, each cell of the frequency can be determined as a reselection candidate cell for the frequency. This allows for the acquisition of the reselection cells for the frequency and their corresponding frequency priorities. This can alleviate the prohibition status of the frequency, increase the number of reselection cells, and reduce the probability of the terminal device remaining in the current serving cell with poor signal for a long time due to the lack of available reselection cells. It can also reduce the probability of missing paging messages.

[0104] To better understand the above method, the following describes in detail an application example of the cell reselection determination method of this application.

[0105] In cell reselection scenarios, it is necessary to reselect the cell according to the reselection criteria of the 3GPP protocol. The 3GPP protocol reselection criteria are as follows:

[0106] Within the same Radio Access Technology (RAT), different frequencies or frequencies from different RATs have absolute priorities. Frequencies with a priority higher than the current service frequency are considered high-priority frequencies, frequencies with the same priority as the current service frequency are considered equal-priority frequencies, and frequencies with a priority lower than the current service frequency are considered low-priority frequencies. For measured cells, a cell reselection evaluation is performed. If multiple neighboring cells on different priority frequencies meet the reselection criteria, the cell with the highest reselection criterion (R value) on the highest priority frequency is selected for reselection. For cells on the same frequency or with equal priority, the R criterion for cell reselection on the same frequency is used. The cell reselection evaluation criteria for different priorities are as follows:

[0107] Cell reselection for high-priority frequency points must meet the following conditions:

[0108] 1) The time spent in the service area exceeds 1 second;

[0109] 2) The reselection criterion is met, that is, the reselection retention value (S criterion, S value) of the high-priority frequency cell is greater than the preset threshold (ThreshX, High: the high-priority reselection threshold value of the neighboring cell).

[0110] 3) The duration for which the reselection criteria are met exceeds the reselection time parameter (TreselectionRAT).

[0111] Cell reselection on the same frequency or with the same priority frequency must meet the following conditions:

[0112] 1) The time spent in the service area exceeds 1 second;

[0113] 2) No high-priority frequency cells meet the reselection criteria;

[0114] 3) The reselection criterion is met, that is, the reselection value of the neighbor cell (R value of neighbor cell, Rn value) of the neighbor cell at the same frequency or with the same priority frequency is better than the reselection value of the serving cell (R value of Serving cell, Rs value).

[0115] 4) The duration for which the reselection criteria are met exceeds the reselection time parameter (TreselectionRAT).

[0116] Cell reselection on low-priority frequencies must meet the following conditions:

[0117] 1) The time spent in the service area exceeds 1 second;

[0118] 2) Cells without high-priority frequencies or cells with the same or equal priority frequencies meet the reselection criteria;

[0119] 3) The reselection criteria are met, that is, the reselection dwell value of the serving cell is less than the preset threshold (ThreshServing, Low: the low priority reselection threshold value of the serving cell), and the reselection dwell value of the neighboring cell with the low priority frequency is greater than the preset threshold (ThreshX, Low: the low priority reselection threshold value of the neighboring cell).

[0120] 4) The duration for which the reselection criteria are met exceeds the reselection time parameter (TreselectionRAT).

[0121] In addition, the 3GPP protocol also describes the handling of unsuitable cells that are not suitable for normal camping as follows:

[0122] If the highest-ranked or best cell according to the absolute priority reselection criterion is a cell on the same or different frequency, but is not applicable to a certain core network type because it belongs to the roaming no-tracking zone list or belongs to a PLMN not marked as an equivalent registered PLMN, then the terminal device shall not consider that cell or other cells on the same frequency as reselection candidates for that core network type for a maximum of 300 seconds. All restrictions should be lifted if the terminal device enters arbitrary cell selection mode. If the terminal device is redirected to the frequency where the timer is running under the control of the Evolved Universal Terrestrial Radio Access Network (E-UTRAN), the restrictions on that frequency should be lifted.

[0123] If the highest-ranked or best cell according to the reselection criteria is an inter-RAT cell, but is not applicable because it belongs to the roaming no-tracking area list or belongs to a PLMN not marked as equivalent to a registered PLMN, then the terminal device may not consider that cell or other cells on the same frequency as reselection candidates for a maximum of 300 seconds. If the terminal device enters an arbitrary cell selection state, all restrictions should be lifted. If the terminal device is redirected to the frequency where the timer is running under E-UTRAN control, the restrictions on that frequency should be lifted.

[0124] As can be seen from the above description of the protocol, whether the cell ranked highest or the best cell according to the reselection criteria can become a reselection candidate cell is related to whether the PLMN of that cell belongs to an equivalent registered PLMN. The terminal device may encounter the following situations:

[0125] In a real-world network, there exists a frequency where only a portion of the cells are used as shared network cells, while the other cells on that frequency remain dedicated network cells. When a terminal device moves, if a dedicated cell on a shared network frequency becomes the highest-ranked or best cell according to the reselection criteria, because the dedicated cell's PLMN is not an equivalent registered PLMN, other shared network cells on that frequency cannot be used as reselection candidates for a certain period (usually a maximum of 5 minutes). This causes the terminal device to remain on an increasingly worse serving cell, leading to strong neighbor cell interference and missed paging messages.

[0126] To address the aforementioned issues, this embodiment provides a cell reselection dwell determination method applied to terminal devices. This method optimizes the cell reselection dwell determination process during cell reselection, reducing the probability of terminal devices remaining in the current serving cell with poor signal due to the lack of available reselectable cells, thereby reducing the probability of missing paging messages.

[0127] The cell reselection determination method provided in this embodiment is described in detail below:

[0128] I. Collect and share cell information to check whether the cell's PLMN is equivalent to a registered PLMN:

[0129] Existing processes (such as reading SIB1 during PLMN search and cell selection) can be used to collect cell information as historical information; the process of adding neighboring cells and reading SIB1 can also be used to collect cell information as historical information; based on the collected historical information, it can be checked whether the cell's PLMN belongs to an equivalent registered PLMN. Here, SIB1 stands for System Information Block Type 1.

[0130] Specifically, the PLMN of the cell is obtained based on the collected historical information. It is then checked whether the PLMN of the cell is equal to the PLMN that the terminal device has successfully registered, or whether it exists in the equivalent PLMN list. If either condition is met, the PLMN of the cell is determined to be an equivalent registered PLMN.

[0131] II. Measure and evaluate each cell on each frequency, the specific steps are as follows: Figure 3 As shown:

[0132] Step S301: Select any frequency and measure and evaluate each cell on that frequency;

[0133] Step S302: Determine whether the cell of this frequency is a candidate cell. If the cell is not a candidate cell, proceed to step 312 and process it according to the traditional 3GPP protocol process. If the cell is a candidate cell, proceed to step S303.

[0134] Step S303: Determine whether the cell exists in the historical information of the shared PLMN cell information, that is, whether the cell exists in the prior shared PLMN cell information; if the cell does not exist in the prior shared PLMN cell information, proceed to step S304, initiate the acquisition of neighbor cell system messages, read the SIB1 of the cell, and then proceed to step 312 to continue processing according to the traditional 3GPP protocol process; if the cell exists in the prior shared PLMN cell information, proceed to step S305.

[0135] Step S305: Determine whether the PLMN of the cell is an equivalent registered PLMN. If the PLMN of the cell is not an equivalent registered PLMN, proceed to step S312 and continue processing according to the traditional 3GPP protocol process. If at least one PLMN of the cell is an equivalent registered PLMN, proceed to steps S306-S310.

[0136] If all of the following conditions ①-⑤ are met simultaneously, then proceed to step S310, whereby all cells on that frequency are considered reselection candidate cells for that core network type through a bar mechanism, and that frequency is considered the lowest priority reselection frequency for the remaining time:

[0137] ① All cells on this frequency are not considered as reselection candidate cells for the target core network type because when cells on this frequency were previously reselected, the PLMN of the cells did not belong to the equivalent registered PLMN (this frequency can be called the target frequency).

[0138] ② Apart from this frequency, there are no other frequency-specific cells (cells that meet the reselection criteria specified in the 3GPP protocol within the time specified in the protocol) or candidate cells (excluding the serving cell).

[0139] ③ Meet one of the following conditions:

[0140] The signal strength of the current serving cell is lower than the abnormal transmit / receive signal strength threshold (which can be called the fixed threshold 1), or,

[0141] The signal strength of the current serving cell is lower than the normal transmit and receive signal strength threshold (which can be called fixed threshold 2), and the intraFreqReselection flag recorded by the current serving cell indicates that intraFreqReselection is allowed.

[0142] ④ If there is a neighboring cell on this frequency that becomes a candidate cell, and this cell exists in the prior information, the PLMN of this cell belongs to the equivalent registered PLMN;

[0143] ⑤ The signal strength of neighboring cells on this frequency is higher than the normal transmit / receive signal strength threshold;

[0144] Step S313: Determine whether there are still measurement results that need to be evaluated for this frequency. If yes, re-enter step S301; otherwise, end the process.

[0145] III. During cell reselection, if the cell with the highest priority (rank) or the best cell according to the absolute priority reselection criterion is a cell on the same frequency or a cell on a different frequency, but because the PLMN is not an equivalent registered PLMN, it is not applicable to the target core network type, then the following solution is provided:

[0146] Solution a, the specific steps are as follows: Figure 4 As shown:

[0147] Step S401: When there are reselection cells, the reselection cells that do not belong to the equivalent registered PLMN are arranged in order after the other reselection cells to obtain a sorted number of reselection cells.

[0148] Step S402: Determine the target cell for camping determination from the sorted reselection cells, obtain system message SIB1, and check whether the target reselection cell can be camped.

[0149] Step S403: Determine whether the PLMN of the target reselection cell belongs to the equivalent registered PLMN. If the PLMN of the target reselection cell belongs to the equivalent registered PLMN, proceed to step S404 and process it according to the traditional reselection and camping process of the target reselection cell, that is, treat the target reselection cell as the camping cell; if at least one PLMN of the target reselection cell does not belong to the equivalent registered PLMN, proceed to steps S405-S407.

[0150] If conditions ①-② are met simultaneously, proceed to step S408: within 300 seconds, the terminal device does not consider the target reselection cell as a reselection candidate cell for the target core network type, and within 300 seconds, it considers the frequency as the lowest priority reselection frequency. Therefore, within 300 seconds, it can perform camping judgments on other reselection cells in that frequency besides the target reselection cell. This reduces the probability of the terminal device camping on the current serving cell with poor signal for a long time due to the lack of available reselection cells, thereby reducing the probability of missing paging messages. Otherwise, proceed to step S409: within 300 seconds, the terminal device does not consider the target reselection cell and other cells on the same frequency as reselection candidate cells for the target core network type. Therefore, within 300 seconds, it does not need to perform camping judgments on other reselection cells in the target frequency besides the target reselection cell.

[0151] ① There are no other cells or candidate cells (excluding the serving cell) on any other frequency besides this frequency.

[0152] ② One of the following conditions must be met:

[0153] The signal strength of the current serving cell is lower than the abnormal transmit / receive signal strength threshold (which can be called the fixed threshold 1), or,

[0154] The signal strength of the current serving cell is lower than the normal transmit and receive signal strength threshold (which can be called fixed threshold 2), and the intraFreqReselection flag recorded in the SIB1 of the target reselection cell is allowed to be intraFreqReselection.

[0155] Step S410: Determine if there is a cell reselection option; if yes, proceed to step S402; otherwise, end the process.

[0156] Solution b, the specific steps are as follows: Figure 5 As shown:

[0157] Step S501: When there are reselection cells, the reselection cells that do not belong to the equivalent registered PLMN are arranged in order after the other reselection cells to obtain a sorted number of reselection cells.

[0158] Step S502: Determine the target cell for camping judgment from the sorted reselection cells, obtain system message SIB1, and check whether the target reselection cell can be camped.

[0159] Step S503: Determine whether the PLMN of the target reselection cell belongs to the equivalent registered PLMN. If the PLMN of the target reselection cell belongs to the equivalent registered PLMN, proceed to step S504 and process it according to the traditional reselection and camping process of the target reselection cell, that is, treat the target reselection cell as the camping cell; if at least one PLMN of the target reselection cell does not belong to the equivalent registered PLMN, proceed to steps S505-S408.

[0160] If conditions ①-③ are met simultaneously, proceed to step S509: the terminal device does not consider the target reselection cell as a reselection candidate cell for the target core network type within 300 seconds, and considers the frequency as the lowest priority reselection frequency within 300 seconds. Therefore, within 300 seconds, it can perform camping judgment on other reselection cells in the frequency besides the target reselection cell, reducing the probability of the terminal device camping on the current serving cell with poor signal for a long time due to the lack of available reselection cells, thus reducing the probability of missing paging messages. Otherwise, proceed to step S510: the terminal device does not consider the target reselection cell and other cells on the same frequency as reselection candidate cells for the target core network type within 300 seconds, thus eliminating the need to perform camping judgment on other reselection cells in the target frequency besides the target reselection cell within 300 seconds.

[0161] ① One of the following conditions must be met:

[0162] The signal strength of the current serving cell is below the abnormal transmit / receive signal strength threshold, or,

[0163] The signal strength of the current serving cell is lower than the normal transmit and receive signal strength threshold, and the intraFreqReselection flag recorded in the SIB1 of the target reselection cell indicates that intraFreqReselection is allowed.

[0164] ② Other neighboring cells on this frequency are reselection cells or candidate cells of the PLMN that are equivalent registered PLMNs;

[0165] ③ The signal strength of the neighboring cell that meets condition ② is higher than the normal transmit and receive signal strength threshold.

[0166] Step S511: Determine if there is a cell reselection; if yes, proceed to step S502; otherwise, end the process.

[0167] Solution c, the specific steps are as follows: Figure 6 As shown:

[0168] Solution c combines solutions a and b to reduce the scenario where the terminal device does not consider the target reselection cell as a reselection candidate cell of the target core network type within 300 seconds.

[0169] Step S601: When there are reselection cells, the reselection cells that do not belong to the equivalent registered PLMN are arranged in order after the other reselection cells to obtain a sorted number of reselection cells.

[0170] Step S602: Determine the target cell for camping judgment from the sorted reselection cells, obtain system message SIB1, and check whether the target reselection cell can be camped.

[0171] Step S603: Determine whether the PLMN of the target reselection cell belongs to the equivalent registered PLMN. If the PLMN of the target reselection cell belongs to the equivalent registered PLMN, proceed to step S604 and process it according to the traditional reselection and camping process of the target reselection cell, that is, treat the target reselection cell as the camping cell; if at least one PLMN of the target cell does not belong to the equivalent registered PLMN, proceed to steps S605-S409.

[0172] If conditions ①-④ are met simultaneously, proceed to step S610: the terminal device does not consider the target reselection cell as a reselection candidate cell for the target core network type within 300 seconds, and considers the frequency as the lowest priority reselection frequency within 300 seconds. Therefore, within 300 seconds, it can perform camping judgment on other reselection cells in the frequency besides the target reselection cell, reducing the probability of the terminal device camping on the current serving cell with poor signal for a long time due to the lack of available reselection cells, thus reducing the probability of missing paging messages. Otherwise, proceed to step S611: the terminal device does not consider the target reselection cell and other cells on the same frequency as reselection candidate cells for the target core network type within 300 seconds, thus eliminating the need to perform camping judgment on other reselection cells in the target frequency besides the target reselection cell within 300 seconds.

[0173] ① There are no other cells or candidate cells (excluding the serving cell) on any other frequency besides this frequency.

[0174] ② One of the following conditions must be met:

[0175] The signal strength of the current serving cell is below the abnormal transmit / receive signal strength threshold, or,

[0176] The signal strength of the current serving cell is lower than the normal transmit and receive signal strength threshold, and the intraFreqReselection flag recorded in the SIB1 of the target reselection cell indicates that intraFreqReselection is allowed.

[0177] ③ Other neighboring cells on this frequency are reselection cells or candidate cells of the PLMN that are equivalent registered PLMNs;

[0178] ④ The signal strength of a neighboring cell that meets condition ③ is higher than the normal transmit / receive signal strength threshold.

[0179] Step S612: Determine if there is a cell reselection option; if yes, proceed to step S602; otherwise, end the process.

[0180] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps. It is understood that the steps in different embodiments can be freely combined as needed, and all non-contradictory solutions formed by such combinations are within the scope of protection of this application.

[0181] Based on the same inventive concept, this application also provides a cell reselection dwell determination device for implementing the cell reselection dwell determination method described above. This device can be applied to or integrated into a chip or chip module, for example. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more cell reselection dwell determination device embodiments provided below can be found in the limitations of the cell reselection dwell determination method described above, and will not be repeated here.

[0182] In one exemplary embodiment, such as Figure 7 As shown, a cell reselection dwell determination device is provided, wherein:

[0183] The target reselection cell acquisition module 701 is used to determine the target reselection cell to be used for dwell determination among a number of reselection cells;

[0184] The camping determination module 702 is used to determine the camping of only the reselection cells other than the target reselection cell within a set time period when the PLMN of the target reselection cell is not an equivalent registered PLMN and the signal strength of the current serving cell is not up to standard, and there are no other available candidate frequencies or other neighboring cells of the target frequency that are legal and compliant neighboring cells. The target frequency is the frequency where the target reselection cell is located.

[0185] The cell-of-stay determination module 703 is used to identify the target reselection cell as the cell of stay when the PLMN of the target reselection cell is an equivalent registered PLMN.

[0186] In one embodiment, the dwell determination module 702 is further configured to: when the PLMN of the target reselection cell does not belong to an equivalent registered PLMN, and the signal strength of the current serving cell meets the standard, or there are other available candidate frequencies, or other neighboring cells of the target frequency are not legal and compliant neighboring cells, then within a set time period, dwell determination is performed only on reselection cells on frequencies other than the target frequency among a number of reselection cells.

[0187] In one embodiment, the dwell determination module 702 is further configured to: determine that the signal strength of the current serving cell is substandard when the signal strength of the current serving cell is lower than the abnormal transmit / receive signal strength threshold, or when the signal strength of the current serving cell is lower than the normal transmit / receive signal strength threshold and the target reselection cell records whether intra-frequency reselection is allowed as allowed.

[0188] In one embodiment, the dwell determination module 702 is further configured to: determine the neighboring cell as a legitimate and compliant neighboring cell if the neighboring cell on the target frequency exists in the prior information, the PLMN is an equivalent registered PLMN and the signal strength is not lower than the normal transmit and receive signal strength threshold.

[0189] In one embodiment, the target reselection candidate cell acquisition module 701 is further configured to: obtain the priority of each reselection cell based on the frequency priority of the frequency in which each reselection cell is located and the cell reselection ranking value of each reselection cell; and determine the target reselection cell to be used for dwell determination among a number of reselection cells based on the priority of each reselection cell.

[0190] In one embodiment, the apparatus further includes a cell reselection acquisition module, configured to: for a given frequency, if, during the previous reselection phase of each cell on that frequency, the PLMN was not identified as a reselection candidate cell of the target core network type because it is not an equivalent registered PLMN, determine that the given frequency is prohibited due to an invalid PLMN; if, when the given frequency is prohibited due to an invalid PLMN, there are no other available candidate frequencies, the current serving cell signal strength is substandard, the given frequency has legitimate and compliant neighboring cells, and each cell on that frequency meets the reselection criteria except for the time requirement, determine each cell on that frequency as a reselection candidate cell for that frequency; wherein, during the remaining time of a set prohibition period, the frequency priority of the reselection candidate cells on that frequency is lower than the frequency priority of the reselection candidate cells or the reselection cells on other frequencies; the set prohibition period is a period during which only the reselection cells on frequencies other than that frequency are judged for camping; after the time requirement is met, obtain the reselection cell for that frequency based on the reselection candidate cells on that frequency.

[0191] Regarding the modules / units included in the various devices and products described in the above embodiments, they can be software modules / units, hardware modules / units, or a combination of both. For example, for various devices and products applied to or integrated into a chip, all of their modules / units can be implemented using hardware methods such as circuits, or at least some modules / units can be implemented using software programs that run on a processor integrated within the chip, while the remaining (if any) modules / units can be implemented using hardware methods such as circuits; for various devices and products applied to or integrated into a chip module, all of their modules / units can be implemented using hardware methods such as circuits, and different modules / units can be located in the same component (e.g., chip, circuit module, etc.) or different components of the chip module, or at least some modules / units can be implemented using hardware methods such as circuits. The components can be implemented using software programs that run on the processor integrated within the chip module. The remaining (if any) modules / units can be implemented using hardware methods such as circuits. For various devices and products applied to or integrated into the terminal, each of its components / units can be implemented using hardware methods such as circuits. Different modules / units can be located in the same component (e.g., chip, circuit module, etc.) or in different components within the terminal. Alternatively, at least some modules / units can be implemented using software programs that run on the processor integrated within the terminal, while the remaining (if any) modules / units can be implemented using hardware methods such as circuits.

[0192] In one exemplary embodiment, a chip is provided, including a processor and a communication interface, the processor being configured to cause the chip to perform the steps described in the above method embodiments.

[0193] It is understood that the chip involved in the embodiments of this application may be a field-programmable gate array (FPGA), may be an application-specific integrated circuit (ASIC), may be a system on chip (SoC), may be a central processor unit (CPU), may be a network processor (NP), may be a digital signal processor (DSP), may be a microcontroller unit (MCU), may be a programmable logic device (PLD), or other integrated chips, etc.

[0194] Based on the same inventive concept, this application also provides a chip module, such as... Figure 8 As shown, the chip module includes a communication module, a power module, a storage module, and a chip as described in the above chip embodiment. Wherein:

[0195] The power module provides power to the chip module; the storage module stores data and instructions; and the communication module enables internal communication within the chip module or allows the chip module to communicate with external devices.

[0196] The implementation method of this chip module can be found in the relevant content of the above chip embodiment, and will not be repeated here.

[0197] In one embodiment, a terminal device is provided, including a chip as described in the above embodiments, or including a chip module as described in the above embodiments.

[0198] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0199] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0200] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0201] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0202] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0203] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for determining residency in a cell reselection process, characterized in that, Applied to a terminal device, the method includes: Determine the target cell for which a dwell determination is to be made from a number of cell reselection options; If the PLMN of the target reselection cell is not an equivalent registered PLMN and the signal strength of the current serving cell is not up to standard, and there are no other available candidate frequencies or other neighboring cells of the target frequency that are legal and compliant neighboring cells, then within a set time period, only the other reselection cells among a number of reselection cells other than the target reselection cell will be judged for camping, and within the set time period, the frequency priority of the target frequency will be set lower than the frequency priority of other frequencies; the target frequency is the frequency where the target reselection cell is located; If the PLMN of the target reselection cell is an equivalent registered PLMN, the target reselection cell will be used as the stationing cell.

2. The method according to claim 1, characterized in that, The method further includes: If the PLMN of the target reselection cell is not an equivalent registered PLMN, and the signal strength of the current serving cell meets the standard, or there are other available candidate frequencies, or other neighboring cells of the target frequency are not legitimate and compliant neighboring cells, then within a set time period, only the reselection cells on frequencies other than the target frequency among the several reselection cells will be judged for camping.

3. The method according to claim 1, characterized in that, The method further includes: If the signal strength of the current serving cell is lower than the abnormal transmit / receive signal strength threshold, or if the signal strength of the current serving cell is lower than the normal transmit / receive signal strength threshold and the target reselection cell records a "whether co-frequency reselection is allowed" flag indicating that co-frequency reselection is allowed, then the signal strength of the current serving cell is determined to be substandard.

4. The method according to claim 1, characterized in that, The method further includes: If a neighboring cell exists in the prior information at the target frequency, the PLMN is an equivalent registered PLMN, and the signal strength is not lower than the normal transmit / receive signal strength threshold, then the neighboring cell is determined to be a legitimate and compliant neighboring cell.

5. The method according to claim 1, characterized in that, The step of determining the target reselection cell for which a dwell determination is to be made among several reselection cells includes: The priority of each reselected cell is obtained based on the frequency priority of the frequency in which each reselected cell is located and the cell reselection ranking value of each reselected cell. Based on the priority of each reselection cell, the target reselection cell for which a dwell determination is to be made is determined from among several reselection cells.

6. The method according to claim 5, characterized in that, The method further includes: For a given frequency, if, during the reselection phase prior to each cell on that frequency, the PLMN is not identified as a reselection candidate cell for the target core network type because it does not belong to an equivalent registered PLMN, then that frequency is determined to be prohibited due to the PLMN being illegitimate. If a frequency is prohibited due to an invalid PLMN, there are no other available candidate frequencies, the current serving cell signal strength is insufficient, a valid and compliant neighboring cell exists for the frequency, and each cell of the frequency meets the reselection criteria except for time requirements, then each cell of the frequency is determined as a reselection candidate cell for that frequency. During the remaining time of the set prohibition period, the frequency priority of the reselection candidate cells of the frequency is lower than the frequency priority of the reselection candidate cells or reselection cells of other frequencies. The set prohibition period is a period during which only the reselection cell on frequencies other than the frequency mentioned above is judged. After the time requirement is met, other reselection cells for one frequency are obtained based on the reselection candidate cells for one frequency.

7. A dwell determination device for cell reselection, characterized in that, Applied to a terminal device, the device includes: The target cell reselection module is used to determine the target cell for which a dwell decision needs to be made among several reselection cells; The camping determination module is used to determine the camping status of only the reselection cells other than the target reselection cell within a set time period when the PLMN of the target reselection cell is not an equivalent registered PLMN and the signal strength of the current serving cell is not up to standard, and there are no other available candidate frequencies or other neighboring cells of the target frequency that are legal and compliant neighboring cells. The cell-of-stay determination module is used to identify the target reselection cell as the cell of stay when the PLMN of the target reselection cell is an equivalent registered PLMN.

8. A chip, characterized in that, The device includes a processor and a communication interface, wherein the processor is configured to cause the chip to perform the steps of the method described in any one of claims 1 to 6.

9. A chip module, characterized in that, It includes a communication module, a power module, a storage module, and the chip as described in claim 8, wherein: The power module is used to provide power to the chip module; The storage module is used to store data and instructions; The communication module is used for internal communication within the chip module, or for communication between the chip module and external devices.

10. A terminal device, characterized in that, Includes the chip as described in claim 8, or includes the chip module as described in claim 9.

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