Cell reselection method and mobile terminal

Abstract

The invention discloses a cell reselection method and a mobile terminal, and relates to the technical field of communication, and the method comprises the steps that the mobile terminal obtains the reselection priority of each cell and detects the signal quality of each cell; and acquiring a signal difference result of the target cell under the condition that the reselection priority of the target cell is lower than the reselection priority of the serving cell of the mobile terminal and the target cell does not meet a low-priority reselection condition. And under the condition that the signal difference result shows that the signal quality of the target cell is greater than the signal quality of the service cell, improving the reselection priority of the frequency point of the target cell, so that the mobile terminal performs cell reselection based on the frequency point to which the target cell belongs after the reselection priority is improved and the priorities of frequency points to which other non-service cells belong. The effectiveness of cell reselection of the mobile terminal is improved, so that the mobile terminal can reselect a cell with better signal quality and better network quality.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of communication technologies, and in particular, to a cell reselection method and a mobile terminal. Background Art

[0002] The system message of the serving cell of the mobile terminal configures the common priority corresponding to the frequency band to which the serving cell belongs and the common priorities corresponding to at least one frequency band to which a non-serving cell belongs; one frequency band can correspond to multiple cells. When the mobile terminal needs to perform cell reselection, it can perform cell reselection operations on the cells corresponding to each frequency band based on the priorities of each frequency band in the system message.

[0003] Generally, in the cell reselection mechanism based on frequency band priorities, the higher the frequency band priority, the easier it is for the cell corresponding to the frequency band to be reselected as the serving cell by the mobile terminal. Under this cell reselection mechanism, the high-priority serving cell selected by the mobile terminal after cell reselection may have poor signal quality, resulting in problems such as poor network quality and network lag of the mobile terminal after cell reselection. Summary of the Invention

[0004] Embodiments of the present application provide a cell reselection method and a mobile terminal. The mobile terminal can increase the priority of a target cell whose signal quality is higher than that of the serving cell and whose priority is lower than that of the serving cell, but does not meet the low-priority reselection condition. The mobile terminal can perform cell reselection from a cell list including the target cell with higher signal quality after the priority is increased, improving the effectiveness of the cell reselection of the mobile terminal, and further ensuring that the cell accessed by the mobile terminal after cell reselection is a cell with higher signal quality.

[0005] To achieve the above object, the embodiments of the present application adopt the following technical solutions.

[0006] In a first aspect, a cell reselection method is provided, and the method includes:

[0007] The mobile terminal obtains the reselection priorities of each cell. The mobile terminal detects the signal quality of each cell.

[0008] Among them, the signal quality of each cell can represent the measured value of at least one parameter among the reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), and signal to interference plus noise (SINR) of each cell.

[0009] When the reselection priority of the target cell is lower than that of the serving cell of the mobile terminal, and the target cell does not meet the low-priority reselection condition, obtain the signal difference result of the target cell; the target cell is any non-serving cell other than the serving cell among all cells, and the target cell not meeting the low-priority reselection condition includes that the signal quality of the serving cell is greater than or equal to a preset first signal threshold, and / or the signal quality of the target cell is less than a preset second signal threshold.

[0010] When the signal difference result indicates that the signal quality of the target cell is greater than that of the serving cell, increase the reselection priority of the frequency band to which the target cell belongs. Thus, the mobile terminal performs cell reselection based on the frequency band to which the target cell belongs with the increased reselection priority and the priorities of the frequency bands to which other non-serving cells belong.

[0011] In this application, when the mobile terminal performs cell reselection based on the corresponding reselection priorities of each cell, it can first detect the signal quality of each cell. If there is a target cell whose reselection priority is lower than that of the serving cell of the mobile terminal and does not meet the low-priority reselection condition, the signal quality difference result between the target cell and the serving cell can be further determined. When the signal quality of the target cell is better than that of the serving cell, the reselection priority of the target cell can be increased, enabling the mobile terminal to possibly reselect to the target cell with a higher signal quality. For example, the reselection priority of cell 1 is lower than that of the serving cell, but the signal quality of cell 1 is less than the preset second signal threshold and does not meet the low-priority reselection condition. The mobile terminal further determines that the signal quality of cell 1 is better than that of the serving cell. In this case, the reselection priority of cell 1 is increased, providing the mobile terminal with an alternative cell with a higher reselection priority and a higher signal quality. This application can prevent the mobile terminal from failing to reselect to a cell with good signal quality but a low reselection priority during cell reselection, improving the effectiveness of cell reselection of the mobile terminal and ensuring that the cell accessed by the mobile terminal after cell reselection is a cell with a higher signal quality.

[0012] In another possible implementation manner of the first aspect, the system message of the mobile terminal includes the frequency band to which the target cell belongs and the first priority of the frequency band to which the target cell belongs, the dedicated signaling of the mobile terminal does not include the frequency band to which the target cell belongs, and the reselection priority of the target cell is a preset priority, and the first priority is higher than the preset priority.

[0013] Then, when the signal difference result indicates that the signal quality of the target cell is greater than that of the serving cell, increasing the reselection priority of the target cell frequency band includes:

[0014] When the signal difference result indicates that the signal quality of the target cell is greater than that of the serving cell, and the difference value between the signal quality of the target cell and that of the serving cell is greater than a preset first difference threshold, the mobile terminal determines the reselection priority of the target cell as the first priority.

[0015] Among them, the first priority of the frequency band to which the target cell belongs included in the system message is the common reselection priority.

[0016] In this application, the mobile terminal can restore the reselection priority of the target cell to the common reselection priority corresponding to the frequency band to which the target cell belongs in the system message, so that the target cell with higher signal quality can be considered by the mobile terminal for cell reselection, avoiding the situation that the mobile terminal cannot reselect a cell with good signal quality but low reselection priority during cell reselection, improving the effectiveness of cell reselection of the mobile terminal, and ensuring that the cell accessed by the mobile terminal after cell reselection is a cell with higher signal quality.

[0017] In another possible implementation manner of the first aspect, the system message of the mobile terminal includes the frequency band to which the target cell belongs and the first priority of the frequency band to which the target cell belongs, the dedicated signaling of the mobile terminal does not include the frequency band to which the target cell belongs, the reselection priority of the target cell is a preset priority, and the first priority is higher than the preset priority.

[0018] Then, when the signal difference result indicates that the signal quality of the target cell is greater than that of the serving cell, enhancing the reselection priority of the frequency band of the target cell includes:

[0019] When the signal difference result indicates that the signal quality of the target cell is greater than that of the serving cell, and the difference value between the signal quality of the target cell and that of the serving cell is greater than a preset second difference threshold, if the first priority is less than the reselection priority of the serving cell, the mobile terminal determines the reselection priority of the target cell as the reselection priority of the serving cell.

[0020] In this application, if the reselection priority of the target cell itself (the reselection priority indicated in the system message) is relatively low, lower than the reselection priority of the serving cell, the mobile terminal can raise the reselection priority of the target cell to the reselection priority of the serving cell, so that the target cell with higher signal quality can be considered by the mobile terminal for cell reselection, avoiding the situation that the mobile terminal cannot reselect a cell with good signal quality but low reselection priority during cell reselection, improving the effectiveness of cell reselection of the mobile terminal, and ensuring that the cell accessed by the mobile terminal after cell reselection is a cell with higher signal quality.

[0021] In another possible implementation of the first aspect, the dedicated signaling of the mobile terminal includes the frequency band to which the target cell belongs and the second priority of the frequency band to which the target cell belongs; the second priority is less than the reselection priority of the serving cell.

[0022] Then, when the signal difference result indicates that the signal quality of the target cell is greater than that of the serving cell, raising the reselection priority of the target cell frequency band includes:

[0023] When the signal difference result indicates that the signal quality of the target cell is greater than that of the serving cell, and the difference value between the signal quality of the target cell and the signal quality of the serving cell is greater than a preset third difference threshold, the mobile terminal determines the reselection priority of the target cell as the reselection priority of the serving cell.

[0024] Wherein, the second priority of the frequency band to which the serving cell belongs included in the dedicated signaling is the dedicated reselection priority of the serving cell, and the reselection priority of the frequency band to which the target cell belongs included in the dedicated signaling is the dedicated reselection priority of the target cell.

[0025] In this application, the mobile terminal can raise the reselection priority of the target cell to the reselection priority of the serving cell, so that the target cell with higher signal quality can be considered by the mobile terminal for cell reselection, avoiding the situation that the mobile terminal cannot reselect a cell with good signal quality but low reselection priority during cell reselection, improving the effectiveness of cell reselection of the mobile terminal, and ensuring that the cell accessed by the mobile terminal after cell reselection is a cell with higher signal quality.

[0026] In another possible implementation of the first aspect, the system message of the mobile terminal includes the frequency band to which the serving cell belongs and the reselection priority of the frequency band to which the serving cell belongs.

[0027] Then, when the signal difference result indicates that the signal quality of the target cell is greater than that of the serving cell, raising the reselection priority of the target cell frequency band includes:

[0028] When the signal difference result indicates that the signal quality of the target cell is greater than that of the serving cell, and the difference value between the signal quality of the target cell and the signal quality of the serving cell is greater than a preset fourth difference threshold, the mobile terminal determines the reselection priority of the target cell as the third priority.

[0029] Wherein, the third priority is higher than or equal to the reselection priority of the serving cell.

[0030] In this application, the mobile terminal can directly raise the reselection priority of the target cell to be higher than or equal to the reselection priority of the frequency band to which the serving cell belongs, so that the target cell with better signal quality can be considered by the mobile terminal for cell reselection, avoiding the situation that the mobile terminal fails to reselect to a cell with good signal quality but low reselection priority during cell reselection, improving the effectiveness of cell reselection of the mobile terminal, and ensuring that the cell accessed by the mobile terminal after cell reselection is a cell with relatively high signal quality.

[0031] In another possible implementation manner of the first aspect, the system message of the mobile terminal includes a first frequency band set, and the dedicated instruction of the mobile terminal includes a second frequency band set. At least the frequency band to which the serving cell belongs is included in the intersection of the first frequency band set and the second frequency band set.

[0032] Then, the mobile terminal detects the signal quality of each cell, including:

[0033] The mobile terminal detects the signal quality of the cells covered by the first frequency band set; the mobile terminal detects the signal quality of the cells covered by the second frequency band set.

[0034] In this application, the system message and the RRC release connection message can indicate each cell under the same-frequency band and / or different-frequency bands as the serving cell of the mobile terminal. The mobile terminal performs cell measurement on the cells covered by each frequency band included in the system message and the cells covered by each frequency band included in the RRC release connection message, and can measure cells with different reselection priorities to obtain a cell with higher signal quality for cell reselection.

[0035] In another possible implementation manner of the first aspect, the mobile terminal detects the signal quality of each cell, including:

[0036] When the signal quality of the serving cell is less than a preset third signal threshold, the mobile terminal detects the signal quality of each cell; the preset third signal threshold is greater than the preset first signal threshold.

[0037] In this application, when the signal quality of the serving cell is less than the third signal threshold, it can trigger the mobile terminal to detect the signal quality of each cell, so that the mobile terminal can switch to a cell with higher signal quality in time, ensuring the communication quality of the mobile terminal and the network fluency of other services, and optimizing the communication experience of users.

[0038] In another possible implementation manner of the first aspect, the mobile terminal detects the signal quality of each cell, including:

[0039] When the mobile terminal is in the idle state, the mobile terminal detects the signal quality of each cell.

[0040] In this application, when the mobile terminal is in the idle state, the signal quality measurement of each cell can reduce the impact of cell measurement on the mobile terminal services, and at the same time provide more communication resources for cell measurement.

[0041] In another possible implementation manner of the first aspect, the system message of the mobile terminal includes the fourth priority of each frequency point in the first frequency point set, and the dedicated signaling of the mobile terminal includes the fifth priority of each frequency point in the second frequency point set;

[0042] The mobile terminal obtains the reselection priority of each cell, including:

[0043] If the first frequency point is included in both the first frequency point set and the second frequency point set, the reselection priority of the first frequency point is the fifth priority of the first frequency point; if the first frequency point is included in the first frequency point set and not included in the second frequency point set, the reselection priority of the second frequency point is a preset priority.

[0044] Wherein, the preset priority is less than the fifth priority, the preset priority is less than the fourth priority, and the preset priority is less than the reselection priority of the serving cell.

[0045] In this application, the dedicated signaling is used to be sent to the mobile terminal in some specified scenarios or test scenarios. Therefore, after receiving the dedicated signaling, the mobile terminal uses the dedicated reselection priority of each frequency point in the dedicated signaling as the reselection priority for subsequent cell measurement and cell reselection, which can meet the requirements of the specified scenario or test scenario.

[0046] In a second aspect, a mobile terminal is provided. The mobile terminal includes a communication interface, a memory, and one or more processors; the communication interface, the memory are coupled to the processor; computer program code is stored in the memory, and the computer program code includes computer instructions. When the computer instructions are executed by the processor, the mobile terminal is caused to execute the method according to any one of the first aspects described above.

[0047] In a third aspect, a computer-readable storage medium is provided. Instructions are stored in the computer-readable storage medium. When the instructions run on the mobile terminal, the mobile terminal can execute the method according to any one of the first aspects described above.

[0048] In a fourth aspect, a computer program product including instructions is provided. When the computer program product runs on the mobile terminal, the mobile terminal can execute the method according to any one of the first aspects described above.

[0049] In a fifth aspect, an embodiment of this application provides a chip. The chip includes a processor, and the processor is used to call a computer program in the memory to execute the method according to the first aspect.

[0050] Understandably, for the beneficial effects that can be achieved by the mobile terminal described in the second aspect, the computer-readable storage medium described in the third aspect, the computer program product described in the fourth aspect, and the chip described in the fifth aspect provided above, reference may be made to the beneficial effects in the first aspect and any of its possible design manners, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 FIG. 1 is a schematic diagram of a network architecture provided by an embodiment of the present application;

[0052] Figure 2 FIG. 2 is a schematic flowchart of a cell reselection method provided by an embodiment of the present application;

[0053] Figure 3 FIG. 3 is a schematic diagram for determining the reselection priority of a cell provided by an embodiment of the present application;

[0054] Figure 4 FIG. 4 is a schematic flowchart of another cell reselection method provided by an embodiment of the present application;

[0055] Figure 5 FIG. 5 is a schematic flowchart of another cell reselection method provided by an embodiment of the present application;

[0056] Figure 6 FIG. 6 is a schematic flowchart of another cell reselection method provided by an embodiment of the present application;

[0057] Figure 7 FIG. 7 is a schematic flowchart of another cell reselection method provided by an embodiment of the present application;

[0058] Figure 8 FIG. 8 is a schematic structural diagram of a mobile terminal provided by an embodiment of the present application;

[0059] Figure 9 FIG. 9 is a schematic structural diagram of a chip system provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0060] In the description of the embodiments of the present application, the terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and claims of the present application, the singular forms "a", "the", "above-mentioned", "this" and "this one" are also intended to include expressions such as "one or more", unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of the present application, "at least one" and "one or more" mean one or more than two (including two). The term "and / or" is used to describe the association relationship of associated objects and indicates that three relationships may exist; for example, A and / or B may mean: A exists alone, A and B exist simultaneously, and B exists alone, where A and B may be singular or plural. The character " / " generally indicates that the associated objects before and after are an "or" relationship.

[0061] References in this specification to "one embodiment" or "some embodiments" or the like mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" and the like that appear in different places in this specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways. The term "connection" includes direct connection and indirect connection, unless otherwise stated. "First" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0062] In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean for example, illustration or explanation. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0063] A mobile terminal can communicate with a core network or the Internet via a radio access network. Among them, the device for connecting the mobile terminal to the wireless network is a radio access network device. In this embodiment, the mobile terminal can be a portable computer (such as a mobile phone), a tablet computer, a laptop computer, a computer with wireless transceiver function, a wearable device (such as a smart watch), an augmented reality (AR) / virtual reality (VR) device, an in-vehicle computer, a drone, a smart home device, etc. The specific technologies and specific device forms adopted by the mobile terminal in the embodiments of the present application are not limited. The radio access network device can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a 5th generation (5G) mobile communication system, a next generation NodeB in a 6th generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc.

[0064] For a mobile terminal to communicate with a radio access network device, it needs to establish a connection with the cell controlled by the radio access network device. That is, the mobile terminal needs to access and camp on the cell controlled by the radio access network device in order to establish a communication connection with the radio access network device and further communicate with the core network and the Internet. In some actual scenarios, when the mobile terminal has camped on a certain cell, the mobile terminal may be triggered to perform cell reselection due to some reasons.

[0065] For example, referring to Figure 1 , Figure 1 a schematic diagram of a network architecture is given. The mobile terminal is within the coverage area of cell 1 controlled by radio access network device 1, and its currently camped cell is cell 1, and the signal quality of cell 1 is relatively high. Thereafter, the position of the mobile terminal moves, from the coverage area of cell 1 to the coverage area of cell 2 controlled by radio access network device 2, resulting in a change in the reception quality of the signals from different radio access network devices (radio access network device 1 and radio access network device 2) to the mobile terminal.

[0066] For example, the mobile terminal gradually moves away from the coverage area of cell 1, and the signal quality of cell 1 searched by the mobile terminal deteriorates. The mobile terminal enters the coverage area of cell 2, and the signal quality of cell 2 searched by the mobile terminal becomes higher. In this case, the mobile terminal can perform cell reselection among multiple neighboring cells (also called non-serving cells) to obtain a cell with relatively high signal quality at the current location for camping.

[0067] Alternatively, for example, the location of the mobile terminal remains unchanged, but due to certain reasons, the signal quality of the cell where the mobile terminal camps changes. When the mobile terminal is in the radio resource control idle (RRC idle) state, it can also perform cell reselection among multiple neighboring cells (also known as non-serving cells) to camp on a cell with better signal quality at the current location. Among them, the mobile terminal can measure the neighboring cells. When the measurement results of the cells meet the cell selection criterion (S criterion), it can camp on the cell that meets the cell selection criterion.

[0068] In some embodiments, the measurement results of the cells characterize the signal quality of the cells to a certain extent. Exemplarily, the measurement results may include reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), signal to interference plus noise ratio (SINR), which are not specifically limited. The above-mentioned satisfaction of the S criterion may be that Srxlev > 0 and Squal > 0 are satisfied. Among them, Srxlev represents the received power value of the cell, and Srxlev is positively correlated with the RSRP of the cell; Squal represents the signal quality value of the cell, and Squal is positively correlated with the RSRQ of the cell. When the cell meets the S criterion, the terminal device can select to camp on this cell.

[0069] Specifically, the cell reselection process may include a measurement start stage, a measurement result evaluation, and a cell reselection stage.

[0070] For the measurement start stage: In the measurement start stage, the mobile terminal can obtain the reselection priorities of each cell.

[0071] The reselection priority of the cell is the parameter that the mobile terminal needs to consider first when performing cell reselection. Different access networks correspond to different frequency points. An access network may include multiple frequency points, and one frequency point may correspond to multiple cells; the access network device can control multiple cells, one cell corresponds to one frequency point, and the reselection priorities of the cells corresponding to the same frequency point are the same. Therefore, the reselection priority of the cell can also refer to the reselection priority of the frequency point corresponding to the cell. The priorities of different frequency points can be the same or different.

[0072] The reselection priority of a cell can be configured by a radio access network device. For example, when a mobile terminal accesses a radio access network, it can be informed of the reselection priority of a cell through the system information broadcast by the serving cell (i.e., the system message of the serving cell). The parameter corresponding to the reselection priority of a cell can be cellReselectionPriority, and its value range can be 0-7. The larger the value of this parameter, the higher the reselection priority of the frequency band corresponding to the cell.

[0073] The system message of the serving cell can include system information blocks (SIB). Exemplarily, in a communication system based on Global System for Mobile Communications (GSM), the GSM system message of the serving cell can include 8 information blocks (SIB1-SIB8). In a communication system based on Wideband Code Division Multiple Access (WCDMA), the WCDMA system message of the serving cell can include 19 information blocks (SIB1-SIB19). In a communication system based on Long Term Evolution (LTE), the LTE system message of the serving cell can include 13 information blocks (SIB1-SIB13).

[0074] Generally, the reselection priority of the same-frequency band (the frequency band to which the serving cell belongs) can be included in SIB3; the reselection priority of the different-frequency band (the frequency band not belonging to the serving cell) can be included in SIB5; the reselection priority of the inter-system frequency band can be included in SIB6-SIB8. The inter-system frequency band refers to, for example, when the serving cell is a cell based on GSM communication, the inter-system frequency band of the serving cell refers to the frequency band corresponding to the WCDMA communication system or the frequency band corresponding to the LTE communication system.

[0075] In addition to obtaining the reselection priority of the frequency bands of different cells through the system messages received by broadcast, a mobile terminal can also obtain the reselection priority of the frequency bands of a cell by receiving dedicated signaling. Exemplarily, the dedicated signaling can be an RRC connection release message (RRC connection release). When the mobile terminal receives an RRC connection release message containing cellReselectionPriority, the reselection priority of the cell shall be subject to the configuration in the RRC connection release message.

[0076] In addition to obtaining the reselection priorities of each frequency band (corresponding cell) based on the above-mentioned system messages and RRC connection release messages, the mobile terminal can also inherit the reselection priorities of each frequency band (corresponding cell) through other radio access technologies (RATs).

[0077] In some embodiments, the reselection priority in the system message of the serving cell can be referred to as the common reselection priority, and the reselection priorities in the RRC connection release message and inherited through other RATs can be referred to as the dedicated reselection priorities.

[0078] For a certain frequency band (or cell), when the mobile terminal does not receive the dedicated reselection priority, the common reselection priority can be used as the current reselection priority of this frequency band; when the mobile terminal receives the dedicated reselection priority, the dedicated reselection priority can be used as the current reselection priority of this frequency band, ignoring the common reselection priority.

[0079] Specifically, for example, the common reselection priority of frequency band 1 included in the system message received by the mobile terminal is 1. If the mobile terminal receives an RRC connection release message, and the dedicated reselection priority of frequency band 1 included in this RRC connection release message is 2, then the reselection priority of frequency band 1 is determined to be 2 for subsequent cell reselection operations.

[0080] In some scenarios, if the dedicated reselection priority of the frequency band included in the system message is not included in the RRC connection release message, the reselection priority of the frequency band included in the system message and not included in the RRC connection release message is set to the lowest priority.

[0081] For example, the common reselection priority of frequency band 1 included in the system message received by the mobile terminal is 1, and the common reselection priority of frequency band 2 is 2. If the mobile terminal receives an RRC connection release message, and the dedicated reselection priority of frequency band 1 included in this RRC connection release message is 2. The dedicated reselection priority 2 of frequency band 1 in the RRC connection release message is determined as the reselection priority of frequency band 1; since the dedicated priority of frequency band 2 is not included in the RRC connection release message, the reselection priority of frequency band 2 is set to the lowest priority. Among them, in the example where the reselection priority of the frequency band is represented by 0 - 7 and the larger the value, the higher the priority, the lowest priority can be 0.

[0082] For the measurement result evaluation and cell reselection phase:

[0083] For cells on different reselection priority frequency points, the conditions for the mobile terminal to perform cell measurement and cell reselection are different. For a neighboring cell with a reselection priority higher than that of the serving cell, if the Srxlev of this neighboring cell is greater than a preset threshold value and lasts for a first duration, and at the same time the mobile terminal has camped on the current serving cell for more than 1 second, then the mobile terminal device can trigger the process of reselection to this neighboring cell.

[0084] It can be understood that for a neighboring cell with a reselection priority higher than that of the serving cell, the mobile terminal can disregard the signal quality of the serving cell. When the cell with a high reselection priority meets the above reselection conditions, the mobile terminal can reselect to this neighboring cell.

[0085] For a neighboring cell with the same reselection priority as the serving cell (which can include other cells corresponding to the frequency point of the serving cell, or cells corresponding to different frequency points), the mobile terminal can introduce the R criterion for cell measurement and cell reselection.

[0086] Among them, the R criterion means that the mobile terminal can calculate the R values of all cells that meet the S criterion, and sort them according to the R value size. The cell ranked first is considered the optimal cell. Among them, the R value is positively correlated with the RSRP value of the cell, and to a certain extent, the R value can also represent the signal quality of the cell. The larger the R value, the higher the signal quality of this cell.

[0087] Exemplarily, for a neighboring cell with the same reselection priority as the serving cell, according to the calculation results of the R values of each neighboring cell, if the R value (Rn) of this neighboring cell is greater than the R value (Rs) of the serving cell and lasts for a first duration, and at the same time the mobile terminal has camped on the current serving cell for more than 1 second, then the mobile terminal can trigger the process of reselection to this neighboring cell.

[0088] For a neighboring cell with a reselection priority lower than that of the serving cell, if there is no cell on the frequency point with a high reselection priority that meets the reselection conditions of the high-priority cell, and at the same time, there is no cell on the frequency point corresponding to the serving cell or other different frequency points with the same reselection priority that meets the reselection conditions of the same-priority cell. In this case, the conditions for the mobile terminal to trigger the low-priority reselection condition (the conditions for cell measurement and cell reselection from neighboring cells with a reselection priority lower than that of the serving cell) include that the Srxlev of the serving cell is less than a preset first signal threshold value, and the Srxlev of the neighboring cell is greater than a preset second signal threshold value and lasts for a second duration, and the mobile terminal has camped on the current serving cell for more than 1 second, and the terminal can trigger the process of reselection to this neighboring cell.

[0089] That is, when there is no cell meeting the reselection condition of a high-priority cell on a frequency band with a high reselection priority, and at the same time, there is no cell meeting the reselection condition of a same-priority cell on the frequency band corresponding to the serving cell or on other different-frequency bands with the same reselection priority, when the signal quality of the serving cell is poor (Srxlev is less than a preset first signal threshold and has resided for more than 1 second), and the signal quality of the neighboring cell is good (Srxlev is greater than a preset second signal threshold and lasts for a second duration), the low-priority reselection condition is met, and the mobile terminal will be triggered to perform cell measurement and cell reselection from neighboring cells with a reselection priority lower than that of the serving cell.

[0090] The above cell reselection mechanism can also be understood as a mechanism for cell reselection based on the reselection priorities corresponding to each cell. In this cell reselection mechanism, it may cause the mobile terminal to be unable to reselect to a cell with a reselection priority lower than that of the serving cell but with good signal quality. For example, the reselection priority of the serving cell is 2, and Srxlev is less than a preset first signal threshold. The reselection priority of cell 1 is 0 (lower than the reselection priority of the serving cell), but the Srxlev of cell 1 is less than a preset second signal threshold, where the Srxlev of cell 1 is greater than the Srxlev of the serving cell. That is, although the signal quality Srxlev of cell 1 with a low reselection priority is higher than the signal quality Srxlev of the serving cell, the Srxlev of cell 1 is less than the third threshold and does not meet the low-priority reselection condition (Srxlev is greater than a preset second signal threshold). At this time, during cell reselection, cell 1 is difficult to be reselected by the mobile terminal, and the mobile terminal will lose a cell with relatively high signal quality for cell reselection. In addition, it may also cause problems such as poor network quality, network lag, inability to receive incoming calls, and fewer signal bars shown on the interface for the mobile terminal after cell reselection compared to other mobile phones.

[0091] An embodiment of the present application provides a cell reselection method. When a mobile terminal performs cell reselection based on the reselection priorities corresponding to each cell, it can first detect the signal quality of each cell. If there is a target cell whose reselection priority is lower than that of the serving cell of the mobile terminal and does not meet the low-priority reselection condition, the signal quality difference result between the target cell and the serving cell can be further determined. When the signal quality of the target cell is better than that of the serving cell, the reselection priority of the target cell can be increased, enabling the mobile terminal to possibly reselect to the target cell with higher signal quality. For example, the reselection priority of cell 1 is lower than that of the serving cell, but the signal quality of cell 1 is less than a preset second signal threshold and does not meet the low-priority reselection condition. The mobile terminal further determines that the signal quality of cell 1 is better than that of the serving cell. In this case, the reselection priority of cell 1 is increased, providing the mobile terminal with an alternative cell with a higher reselection priority and better signal quality. The present application can prevent the mobile terminal from failing to reselect to a cell with good signal quality but low reselection priority during cell reselection, improving the effectiveness of cell reselection of the mobile terminal and ensuring that the cell accessed by the mobile terminal after cell reselection has relatively high signal quality.

[0092] In some embodiments, a low reselection priority of a cell includes that the common reselection priority of the frequency band corresponding to the cell included in the system message is inherently low. For example, when the mobile terminal has not received the RRC connection release message, the common reselection priority of frequency band 1 to which the serving cell belongs indicated in the system message is 2, and the common reselection priority of frequency band 2 to which cell 2 belongs is 1. The common reselection priority of cell 2 is lower than that of the serving cell.

[0093] In some embodiments, a low reselection priority of a cell further includes a low dedicated reselection priority of the frequency band corresponding to the cell indicated in the RRC connection release message, or the dedicated reselection priority of the frequency band corresponding to the cell is not included in the RRC connection release message. For example, the common reselection priority of the frequency band 1 to which the serving cell belongs indicated in the system message received by the mobile terminal is 2, and the common reselection priority of the frequency band 2 to which cell 2 belongs is 2. The common reselection priority of the frequency band 1 to which the serving cell belongs indicated in the RRC connection release message received by the mobile terminal is 2, and the common reselection priority of the frequency band 2 to which cell 2 belongs is 1. At this time, cell measurement and cell reselection are performed based on the dedicated reselection priority indicated in the RRC connection release message. Then, the reselection priority of cell 2 (being 1) is lower than the reselection priority of cell 1 (being 2). Or, for example, the common reselection priority of the frequency band 1 to which the serving cell belongs indicated in the system message received by the mobile terminal is 2, and the common reselection priority of the frequency band 2 to which cell 2 belongs is 2. The common reselection priority of the frequency band 1 to which the serving cell belongs indicated in the RRC connection release message received by the mobile terminal is 2. Since the information about the dedicated reselection priority of frequency band 2 is not carried in the RRC connection release message, at this time, the reselection priority of frequency band 2 is set to the lowest priority (set to 0). At this time, cell measurement and cell reselection are performed based on the reselection priorities of each cell updated based on the dedicated reselection priority indicated in the RRC connection release message. Then, the reselection priority of cell 2 (being 0) is lower than the reselection priority of cell 1 (being 2).

[0094] For the scenario where a mobile terminal receives a system message and an RRC connection release message to determine the reselection priorities of each cell, a cell reselection method is provided to avoid the problem that a cell with high signal quality but low reselection priority is difficult to be reselected by the mobile terminal. Refer to Figure 2 , Figure 2 A flowchart of a cell reselection method is given, including:

[0095] S201. The mobile terminal obtains the reselection priorities of each cell.

[0096] In this embodiment, one cell corresponds to one frequency band, one frequency band can correspond to multiple cells, the reselection priorities of the cells under the same frequency band are the same, and the reselection priority of a cell is also the reselection priority of the frequency band to which the cell belongs.

[0097] When the mobile terminal accesses the radio access network, the radio access network device sends a system message to the mobile terminal in a broadcast manner. The message block (SIB) of the system message may include the common reselection priority of the frequency band to which the serving cell of the mobile terminal belongs and the common reselection priorities of other frequency bands.

[0098] When the mobile terminal only receives system information, that is, when there are only common reselection priorities for each frequency band in the mobile terminal, the mobile terminal determines the common reselection priorities for each frequency band as the reselection priorities.

[0099] For example, the system information includes that the common reselection priority of frequency band 1 to which the serving cell of the mobile terminal belongs is 2, the common reselection priority of frequency band 2 is 2, the common reselection priority of frequency band 3 is 2, and the common reselection priority of frequency band 4 is 1. Then, the mobile terminal determines the common reselection priorities corresponding to the frequency bands to which each cell belongs as the reselection priorities.

[0100] In some scenarios, a radio access network device (such as a base station) randomly sends an RRC connection release message to the mobile terminal. When the mobile terminal receives an RRC connection release message containing cellReselectionPriorit, the mobile terminal performs cell reselection with the dedicated reselection priorities of each frequency band indicated by the RRC connection release message as the reselection priorities. Here, cellReselectionPriorit represents the dedicated reselection priority of a frequency band.

[0101] For example, the system information includes that the common reselection priority of frequency band 1 to which the serving cell of the mobile terminal belongs is 2, the common reselection priority of frequency band 2 is 2, the common reselection priority of frequency band 3 is 2, and the common reselection priority of frequency band 4 is 1. The RRC connection release message includes that the dedicated reselection priority of frequency band 1 to which the serving cell of the mobile terminal belongs is 2, the dedicated reselection priority of frequency band 2 is 2, the dedicated reselection priority of frequency band 3 is 2, and the dedicated reselection priority of frequency band 4 is 2. Then, the mobile terminal determines the dedicated reselection priorities corresponding to the frequency bands to which each cell belongs as the reselection priorities. For example, the reselection priority of the cell corresponding to frequency band 4 is updated from the common reselection priority 1 to the dedicated reselection priority 2.

[0102] Specifically, in some embodiments, the mobile terminal determines the reselection priorities of each cell based on the common reselection priorities (the fourth priorities) of each frequency band in the system information and the dedicated reselection priorities (the fifth priorities) of each frequency band in the dedicated signaling (such as the RRC connection release message). Reference can be made to Figure 3 as shown. Figure 3 A schematic diagram for determining the reselection priorities of cells is given. Among them, the frequency bands indicated by the system information form a first frequency band set. The frequency bands indicated by the RRC connection release message form a second frequency band set. At least the frequency band to which the serving cell belongs is included in the intersection of the first frequency band set and the second frequency band set. Exemplarily, referring to Figure 3 , the first frequency band set of the system information includes frequency band 1, frequency band 2, frequency band 3, and frequency band 4. The second frequency band set in the RRC connection release message includes frequency band 1, frequency band 2, and frequency band 3. For example, frequency band 1 can be the frequency band to which the serving cell of the mobile terminal belongs.

[0103] If the first frequency point set and the second frequency point set both contain a first frequency point, the reselection priority of the first frequency point is the fifth priority of the first frequency point.

[0104] In this embodiment, by way of example, referring to Figure 3 , the first frequency points included in both the system message and the RRC release connection message include frequency point 1, frequency point 2, and frequency point 3. Among them, the common reselection priority of frequency point 1 in the system message is 2, the common reselection priority of frequency point 2 is 1, and the common reselection priority of frequency point 3 is 2. The dedicated reselection priority of frequency point 1 in the RRC release connection message is 2, the dedicated reselection priority of frequency point 2 is 2, and the dedicated reselection priority of frequency point 3 is 2.

[0105] Then, the mobile terminal determines that the reselection priorities of frequency point 1, frequency point 2, and frequency point 3 are the corresponding dedicated reselection priorities. That is, the reselection priority of frequency point 1 is 2, the reselection priority of frequency point 2 is 2, and the reselection priority of frequency point 3 is 2.

[0106] If the first frequency point set contains a second frequency point and the second frequency point set does not contain the second frequency point, the reselection priority of the second frequency point is a preset priority.

[0107] Among them, the preset priority is less than the fourth priority, the preset priority is less than the fifth priority, and the preset priority is less than the reselection priority of the serving frequency point to which the serving cell belongs.

[0108] In this embodiment, the preset priority can represent the lowest priority. For example, in an example where 0 - 7 is used to represent the reselection priority of frequency points and the larger the value, the higher the priority, the preset priority can be 0.

[0109] In this embodiment, by way of example, referring to Figure 3 , the second frequency point that only exists in the first frequency point set of the system message and does not exist in the second frequency point set of the RRC release connection message includes frequency point 4. Among them, the common reselection priority of frequency point 4 in the system message is 2. If the reselection priority of frequency point 4 is determined as the preset priority, then the reselection priority of frequency point 4 is set to 0.

[0110] In this embodiment, the dedicated signaling is used to be sent to the mobile terminal in some specified scenarios or test scenarios. Therefore, after receiving the dedicated signaling, the mobile terminal uses the dedicated reselection priorities of the respective frequency points in the dedicated signaling as the reselection priorities for subsequent cell measurement and cell reselection, which can meet the requirements of the specified scenarios or test scenarios.

[0111] S202. The mobile terminal detects the signal quality of each cell.

[0112] In this embodiment, the mobile terminal can perform cell measurements based on the cells corresponding to each frequency point included in the system message to obtain the signal quality of each cell.

[0113] In some embodiments, when the mobile terminal receives an RRC connection release message, it can perform cell measurements on the cells covered by each frequency point included in the system message and the cells covered by each frequency point included in the RRC connection release message to obtain the signal quality of each cell.

[0114] In this embodiment, the system message and the RRC connection release message can indicate each cell under the same-frequency and / or different-frequency points as the serving cell of the mobile terminal. The mobile terminal performs cell measurements based on the non-serving cells covered by each frequency point included in the system message and the non-serving cells covered by each frequency point included in the RRC connection release message, and can measure cells with different reselection priorities to obtain a cell with higher signal quality for cell reselection.

[0115] The mobile terminal obtains the signal quality of each cell. The signal quality can represent parameter values such as the received power value Srxlev of the cell, the signal quality value Squal of the cell, and the signal strength value. Exemplarily, the signal quality of the cell can also represent the signal strength value. For example, the signal strength values are -110db, -100db, -90db, -80db, -70db, etc. The larger the signal strength value, the higher the signal quality. That is, the signal quality of a cell with a signal strength value of -90db is higher than the signal quality of a cell with a signal strength value of -100db.

[0116] S203. When the reselection priority of the target cell is lower than the reselection priority of the serving cell of the mobile terminal and the target cell does not meet the low-priority reselection condition, obtain the signal difference result of the target cell.

[0117] Wherein, the target cell is any non-serving cell other than the serving cell among all cells. The target cell not meeting the low-priority reselection condition includes that the signal quality of the serving cell is greater than or equal to a preset first signal threshold, and / or the signal quality of the target cell is less than a preset second signal threshold.

[0118] Wherein, the second signal threshold is greater than the first signal threshold.

[0119] The first signal threshold can be understood as the threshold value for triggering the mobile terminal to perform cell measurement from a non-serving cell whose reselection priority is lower than that of the serving cell. If the signal quality of the serving cell is less than the first signal threshold, it is considered that the signal quality of the serving cell is relatively poor. The second signal threshold can be understood as the threshold value at which a non-serving cell with a reselection priority lower than that of the serving cell can be measured by the mobile terminal. If the signal quality of the non-serving cell is higher than the second signal threshold, since the second signal threshold is greater than the first signal threshold and the signal quality of the non-serving cell is higher than that of the serving cell, then in this case, it is considered that although the reselection priority of the non-serving cell is relatively low, its signal quality is relatively high and higher than that of the serving cell, and it can be considered for cell reselection.

[0120] In this embodiment, referring to Figure 2 , Figure 2 in Figure 3 the example given, Figure 2 the reselection priorities of the cells obtained by the mobile terminal include that the reselection priority of frequency point 1 is 2, the reselection priority of frequency point 2 is 2, the reselection priority of frequency point 3 is 2, and the reselection priority of frequency point 4 is 0. Among them, frequency point 1 is the frequency point to which the serving cell belongs.

[0121] In some embodiments, if there is a non-serving cell whose reselection priority is higher than that of the serving cell, then the mobile terminal can directly reselect and camp on this non-serving cell. If there are multiple non-serving cells whose reselection priorities are higher than that of the serving cell, then the mobile terminal can directly reselect and camp on the cell with the highest signal quality among the multiple non-serving cells whose reselection priorities are higher than that of the serving cell.

[0122] In some embodiments, if there is no non-serving cell whose reselection priority is higher than that of the serving cell and there is one or more non-serving cells whose reselection priorities are equal to that of the serving cell, then the mobile terminal can select to reselect and camp on one non-serving cell whose signal quality is higher than that of the serving cell from the one or more non-serving cells with the same reselection priority as the serving cell. For example, Figure 2 as shown in

[0123] However, among one or more non-serving cells with a reselection priority equal to that of the serving cell, there may be no non-serving cell with a signal quality higher than that of the serving cell. At this time, the mobile terminal detects the signal quality of non-serving cells with a reselection priority lower than that of the serving cell, and further makes a cell reselection determination. For example, Figure 2 For frequency band 2 and frequency band 3 with the same reselection priority as the frequency band 1 to which the serving cell belongs, as shown. If there is no non-serving cell with a signal quality higher than that of the serving cell among the cells corresponding to frequency band 2 and frequency band 3, then the mobile terminal can obtain the cell corresponding to frequency band 4 for detection, where the reselection priority of frequency band 4 is lower than that of frequency band 1. The mobile terminal obtains the signal quality of the cell corresponding to frequency band 4, and makes a further determination based on the difference result between the signal quality of the cell corresponding to frequency band 4 and the signal quality of the serving cell.

[0124] In some embodiments, for a target cell with a reselection priority lower than that of the serving cell, for example, the target cell 1 corresponding to frequency band 4. If the target cell 1 meets the low-priority reselection condition. That is, the signal quality of the serving cell is relatively poor, the signal quality S1 of the serving cell (for example, -110 dB) is less than a preset first signal threshold (for example, the first signal threshold can be -100 dB), and at the same time, the signal quality of the target cell 1 is relatively good, the signal quality S2 of the target cell 1 (for example, -70 dB) is greater than a preset second signal threshold (for example, the second signal threshold can be -80 dB). In this case, although the reselection priority (0) of the target cell 1 is relatively low, the signal quality of the target cell 1 is relatively high, the signal quality of the target cell 1 is greater than the threshold value, that is, the signal quality (-70 dB) of the target cell 1 is much higher than the signal quality (-110 dB) of the serving cell. When the low-priority reselection condition is met, the target cell can be considered for cell reselection.

[0125] In some embodiments, the target cell may not meet the low-priority condition. For example, the signal quality S2 of the target cell is less than the second signal threshold; for example, the signal quality S1 of the serving cell is greater than or equal to the preset first signal threshold; for example, the signal quality S1 of the serving cell is greater than or equal to the preset first signal threshold, and the signal quality S2 of the target cell is less than the preset second signal threshold.

[0126] For the case where the signal quality S1 of the serving cell is greater than or equal to a preset first signal threshold, or for the case where the signal quality S1 of the serving cell is greater than or equal to the preset first signal threshold and the signal quality S2 of the target cell is less than the preset second signal threshold, it means that the signal quality of the serving cell is not that bad, and the mobile terminal can perform cell reselection from non-serving cells with the same reselection priority as the serving cell, or not perform cell reselection.

[0127] For the case where the signal quality S2 of the target cell is less than the preset second signal threshold, there are multiple situations. For example, the signal quality of the serving cell is less than the first signal threshold, the signal quality of the serving cell is relatively poor, the signal quality of the target cell is less than the second signal threshold, the signal quality of the target cell may also be relatively poor, and the signal quality of the target cell is lower than that of the serving cell; or, for example, the signal quality of the serving cell is less than the preset first signal threshold, the signal quality of the serving cell is relatively poor, although the signal quality of the target cell is higher than that of the serving cell, but the signal quality of the target cell does not reach the preset second signal threshold (threshold value), so it still does not meet the low-priority reselection condition. For such target cells, if they cannot be reselected due to not meeting the low-priority reselection condition, it may cause the mobile terminal to miss an opportunity to reselect to a cell with better signal quality. Therefore, in this embodiment, the mobile terminal can further determine the signal quality of the target cell and perform corresponding operations based on the difference result between the signal quality of the target cell and the signal quality of the serving cell.

[0128] S204. When the signal difference result indicates that the signal quality of the target cell is greater than the signal quality of the serving cell, increase the reselection priority of the target cell frequency band.

[0129] In this embodiment, the signal difference result may include that the signal quality of the target cell is lower than or equal to (less than or equal to) the signal quality of the serving cell. Exemplarily, the signal difference result may be the absolute value of the difference between the signal quality of the target cell and the signal quality of the serving cell. For example, when the signal quality S2 of the target cell 2 corresponding to frequency band 4 is -120 db and the signal quality S2 is less than the second signal threshold (-80 db), it does not meet the low-priority reselection condition. The mobile terminal obtains the difference result between the signal quality of the target cell 2 and the signal quality of the serving cell, and the signal quality S2 (-120 db) of the target cell 2 is less than the signal quality S1 (-110 db) of the serving cell. For the case where the signal quality of the target cell 2 is less than (or equal to) the signal quality of the serving cell, the mobile terminal will not obtain better communication quality or network quality by reselecting and camping on this cell, and the mobile terminal can then not consider performing cell reselection on this cell.

[0130] In this embodiment, the signal difference result may also be that the signal quality of the target cell is higher (greater than) the signal quality of the serving cell. For example, when the signal quality S2 of the target cell 3 corresponding to frequency point 4 is -81 dB, and the signal quality S2 is less than the second signal threshold (-80 dB), the low-priority reselection condition is not satisfied. The mobile terminal obtains the difference result between the signal quality of the target cell 3 and the signal quality of the serving cell. The signal quality S2 (-81 dB) of the target cell 3 is greater than the signal quality S1 (-110 dB) of the serving cell. For this situation, if the mobile terminal reselects and camps on this cell, it may obtain better communication quality or network quality. Then, the mobile terminal can consider performing cell reselection on this target cell 3. Since the reselection priority of the target cell 3 is lower than the reselection priority of the serving cell, the mobile terminal needs to increase the reselection priority of the frequency point corresponding to the target cell 3 so that the target cell 3 can be considered by the mobile terminal for cell reselection.

[0131] In some embodiments, the mobile terminal may also increase the reselection priority of frequency point 4 based on the common reselection priority of frequency point 4 included in the system message. Exemplarily, referring to Figure 3 , the common reselection priority of frequency point 4 included in the system message is 2. Then, the mobile terminal can increase the reselection priority of frequency point 4 from 0 to 2.

[0132] If the dedicated signaling (RRC release connection message) does not include the dedicated reselection priority of the frequency point to which the target cell belongs, and the target system message includes the common reselection priority (the first priority) of the frequency point to which the target cell belongs, the mobile terminal may restore the reselection priority of the target cell to the common reselection priority.

[0133] Exemplarily, the common reselection priority of frequency point 4 is 2, yet the reselection priority of frequency point 4 is 0. This is because the system message includes the frequency point to which the target cell belongs (frequency point 4) and the first priority (common reselection priority) of the frequency point to which the target cell belongs (frequency point 4), while the dedicated signaling (RRC release continuous message) of the mobile terminal does not include the frequency point to which the target cell belongs (frequency point 4). Therefore, the mobile terminal sets the reselection priority of the target cell (corresponding to frequency point 4) to the preset priority. Exemplarily, reference may be made to Figure 3 the determination process of the reselection priority of frequency point 4 shown.

[0134] Here, the preset priority may represent the lowest priority. For example, in an example where 0 - 7 is used to represent the reselection priority of a frequency point and the larger the value, the higher the priority, the preset priority may be 0. The first priority of the frequency point to which the target cell belongs (frequency point 4) in the system message is greater than 0.

[0135] For this case, the system message already includes the common reselection priority of the frequency band to which the target cell belongs (frequency band 4), so the mobile terminal can restore the reselection priority of the frequency band to which the target cell belongs to its corresponding common reselection priority.

[0136] Reference Figure 4 , Figure 4 shows a flowchart of another cell method. After executing S203 to obtain the signal difference result of the target cell, S204 includes:

[0137] S2041. When the signal difference result indicates that the signal quality of the target cell is greater than that of the serving cell, and the difference value between the signal quality of the target cell and that of the serving cell is greater than a preset first difference threshold, the mobile terminal determines the reselection priority of the target cell as the first priority.

[0138] Among them, the signal difference result indicating that the signal quality of the target cell is greater than that of the serving cell means that the signal quality of the target cell is better than that of the serving cell. When the difference value (S2 - S1) between the signal quality of the target cell and that of the serving cell is greater than a preset first difference threshold (threh1), the mobile terminal determines the reselection priority of the target cell as the first priority.

[0139] For example, the preset first difference threshold is 15 db. Reference Figure 4 As shown, the first priority (common reselection priority in the system message) of frequency band 4 is 2, and the dedicated reselection priority of frequency band 4 is not included in the RRC release connection message, resulting in the reselection priority of frequency band 4 being 0. The reselection priority of the serving cell (belonging to frequency band 1) is 2.

[0140] The signal quality of the target cell 4 corresponding to frequency band 4 is -81 db, and the signal quality of the serving cell is (-110 db). Among the non-serving cells with the same reselection priority, there is no non-serving cell with a signal quality higher than that of the serving cell. For example, the signal quality of non-serving cell 1 corresponding to frequency band 2 is -115 db, and the signal quality of non-serving cell 2 corresponding to frequency band 3 is -118 db. The signal quality S2 (-81 db) of the target cell (non-serving cell 4) is greater than the signal quality S1 (-110 db) of the serving cell, and the difference value between the signal quality S2 (-81 db) of target cell 4 and the signal quality S1 (-110 db) of the serving cell is 29 db, which is greater than the preset first difference threshold (15 db).

[0141] In this case, the mobile terminal determines the reselection priority (0) of target cell 4 as the first priority (2) of frequency band 4.

[0142] In this embodiment, the mobile terminal can restore the reselection priority of the target cell to the common reselection priority corresponding to the frequency band to which the target cell belongs in the system message, so that the target cell with higher signal quality can be considered by the mobile terminal for cell reselection, avoiding the situation that the mobile terminal cannot reselect a cell with good signal quality but low reselection priority during cell reselection, improving the effectiveness of cell reselection of the mobile terminal, and ensuring that the cell accessed by the mobile terminal after cell reselection is a cell with higher signal quality.

[0143] Alternatively, in some embodiments, if the common reselection priority of the frequency band to which the target cell belongs included in the system message is itself lower than the reselection priority of the frequency band to which the serving cell belongs, and since the dedicated signaling (RRC connection release message) does not include the dedicated reselection priority of the frequency band to which the target cell belongs, the reselection priority of the frequency band to which the target cell belongs is set to the lowest priority. In this case, when the mobile terminal restores the reselection priority of the target cell from the lowest priority to the common reselection priority of the frequency band to which the target cell belongs in the system message, the resulting reselection priority of the frequency band to which the target cell belongs is still lower than the reselection priority of the frequency band to which the serving cell belongs. The target cell will still not be reselected by the mobile terminal because it cannot meet the low-priority reselection conditions.

[0144] In this case, the mobile terminal can raise the reselection priority of the frequency band to which the target cell belongs to the reselection priority of the frequency band to which the serving cell belongs, so that the reselection priority of the frequency band to which the target cell belongs is the same as the reselection priority of the frequency band to which the serving cell belongs.

[0145] Reference Figure 5 , Figure 5 shows a schematic flowchart of another cell method. After performing S203 to obtain the signal difference result of the target cell, S204 includes:

[0146] S2042. When the signal difference result indicates that the signal quality of the target cell is greater than the signal quality of the serving cell, and the difference value between the signal quality of the target cell and the signal quality of the serving cell is greater than a preset second difference threshold, if the first priority is less than the reselection priority of the serving cell, the mobile terminal determines the reselection priority of the target cell as the reselection priority of the serving cell.

[0147] Among them, the signal difference result indicating that the signal quality of the target cell is greater than the signal quality of the serving cell means that the signal quality of the target cell is better than the signal quality of the serving cell. When the common reselection priority of the frequency band to which the target cell belongs is still lower than the reselection priority of the frequency band to which the serving cell belongs, and when the difference value (S2 - S1) between the signal quality of the target cell and the signal quality of the serving cell is greater than a preset second difference threshold (threh2), the mobile terminal determines the reselection priority of the target cell as the reselection priority of the serving cell.

[0148] For example, the preset second difference threshold is 20 db. Refer to Figure 5 As shown, the first priority of frequency point 4 (the common reselection priority in the system message) is 1, and the dedicated reselection priority of frequency point 4 is not included in the RRC connection release message, resulting in the reselection priority of frequency point 4 being 0. The reselection priority of the serving cell (the frequency band 1 it belongs to) is 2.

[0149] The signal quality of the target cell 4 corresponding to frequency point 4 is -81 db, and the signal quality of the serving cell is (-110 db). Among non-serving cells with the same reselection priority, there is no non-serving cell with a signal quality higher than that of the serving cell. For example, the signal quality of non-serving cell 1 corresponding to frequency point 2 is -115 db, and the signal quality of non-serving cell 2 corresponding to frequency point 3 is -118 db. The signal quality S2 (-81 db) of the target cell (non-serving cell 4) is greater than the signal quality S1 (-110 db) of the serving cell, and the difference value between the signal quality S2 (-81 db) of target cell 4 and the signal quality S1 (-110 db) of the serving cell is 29 db, which is greater than the preset second difference threshold (20 db).

[0150] In this case, if the mobile terminal determines the first priority (1) of frequency point 4 as the reselection priority of target cell 4, the reselection priority (1) of target cell 4 is still lower than the reselection priority (2) of the serving cell. At this time, the mobile terminal determines the reselection priority (2) of the serving cell (that is, the second priority of the serving cell) as the reselection priority (2) of target cell 4.

[0151] In this embodiment, the mobile terminal can increase the reselection priority of the target cell to the reselection priority of the serving cell, so that the target cell with a higher signal quality can be considered by the mobile terminal for cell reselection, avoiding the situation that the mobile terminal cannot reselect a cell with good signal quality but low reselection priority during cell reselection, improving the effectiveness of cell reselection of the mobile terminal, and ensuring that the cell accessed by the mobile terminal after cell reselection is a cell with a higher signal quality.

[0152] Alternatively, in some embodiments, if the dedicated signaling (RRC connection release message) includes the dedicated reselection priority (second priority) of the frequency band to which the target cell belongs, but the dedicated reselection priority of the frequency band to which the target cell belongs is still lower than the reselection priority of the serving cell, the mobile terminal can increase the reselection priority of the target cell to the reselection priority of the serving cell.

[0153] Exemplarily, if the common reselection priority of frequency point 4 is 1 and the dedicated reselection priority of frequency point 4 is 1. Both the dedicated reselection priority of frequency point 4 and the common reselection priority of frequency point 4 are lower than the reselection priority (2) of the frequency band 1 to which the serving cell belongs.

[0154] In these cases, the mobile terminal may raise the reselection priority of the frequency band to which the target cell belongs to the reselection priority of the frequency band to which the serving cell belongs.

[0155] Reference Figure 6 , Figure 6 shows a flowchart of another cell method. After executing S203 to obtain the signal difference result of the target cell, S204 includes:

[0156] S2043. When the signal difference result indicates that the signal quality of the target cell is greater than the signal quality of the serving cell, and the difference value between the signal quality of the target cell and the signal quality of the serving cell is greater than a preset third difference threshold, the mobile terminal determines the reselection priority of the target cell as the reselection priority of the serving cell.

[0157] Among them, the signal difference result indicating that the signal quality of the target cell is greater than the signal quality of the serving cell means that the signal quality of the target cell is better than the signal quality of the serving cell. When the common reselection priority and the dedicated reselection priority of the frequency band to which the target cell belongs are still lower than the reselection priority of the serving cell, in the case where the difference value (S2 - S1) between the signal quality of the target cell and the signal quality of the serving cell is greater than a preset third difference threshold (threh3), the mobile terminal determines the reselection priority of the target cell as the reselection priority of the serving cell.

[0158] For example, the preset third difference threshold is 20 db. The preset third difference threshold may be the same as the preset second threshold. Reference Figure 6 As shown, the first priority (common reselection priority in the system message) of frequency band 4 is 1, the dedicated reselection priority of frequency band 4 in the RRC release connection message is 1, and the reselection priority of frequency band 4 is 1. The reselection priority of the serving cell (frequency band 1 to which it belongs) is 2.

[0159] The signal quality of the target cell 4 corresponding to frequency band 4 is -81 db, and the signal quality of the serving cell is (-110 db). Among the cells with the same reselection priority, there is no non-serving cell with a signal quality higher than that of the serving cell. For example, the signal quality of non-serving cell 1 corresponding to frequency band 2 is -115 db, and the signal quality of non-serving cell 2 corresponding to frequency band 3 is -118 db. The signal quality S2 (-81 db) of the target cell (non-serving cell 4) is greater than the signal quality S1 (-110 db) of the serving cell, and the difference value between the signal quality S2 (-81 db) of target cell 4 and the signal quality S1 (-110 db) of the serving cell is 29 db, which is greater than the preset third difference threshold (20 db).

[0160] In this case, the dedicated reselection priority (1) of frequency point 4 is the reselection priority of target cell 4, and the reselection priority (1) of target cell 4 is lower than the reselection priority (2) of the serving cell. At this time, the mobile terminal determines the reselection priority (2) of the serving cell as the reselection priority (2) of the target cell.

[0161] In this embodiment, the mobile terminal can raise the reselection priority of the target cell to the reselection priority of the serving cell, so that the target cell with higher signal quality can be considered by the mobile terminal for cell reselection, avoiding the situation that the mobile terminal cannot reselect to a cell with good signal quality but low reselection priority during cell reselection, improving the effectiveness of cell reselection of the mobile terminal, and ensuring that the cell accessed by the mobile terminal after cell reselection is a cell with higher signal quality.

[0162] Alternatively, in some embodiments, the mobile terminal can also raise the reselection priority (0) of the target cell 3 (corresponding to frequency point 4) to a specified priority, and the specified priority can be equal to or higher than the reselection priority of the serving cell. For example, raise the reselection priority of frequency point 4 from 0 to 3.

[0163] The system message of the mobile terminal may include the frequency point to which the serving cell belongs and the reselection priority of the frequency point to which the serving cell belongs. The mobile terminal can directly raise the reselection priority of the target cell to be equal to or higher than the reselection priority of the serving cell based on the reselection priority of the frequency point to which the serving cell belongs.

[0164] Reference Figure 7 , Figure 7 shows a flowchart of another cell method. After executing S203 to obtain the signal difference result of the target cell, S204 includes:

[0165] S2044. When the signal difference result indicates that the signal quality of the target cell is greater than the signal quality of the serving cell, and the difference value between the signal quality of the target cell and the signal quality of the serving cell is greater than a preset fourth difference threshold, the mobile terminal determines the reselection priority of the target cell as the third priority.

[0166] Among them, the third priority is higher than or equal to the reselection priority of the serving cell.

[0167] Among them, the signal difference result indicating that the signal quality of the target cell is greater than the signal quality of the serving cell means that the signal quality of the target cell is better than the signal quality of the serving cell. When the difference value (S2 - S1) between the signal quality of the target cell and the signal quality of the serving cell is greater than a preset fourth difference threshold (threh4), the mobile terminal determines the reselection priority of the target cell as the reselection priority of the serving cell.

[0168] For example, the preset fourth difference threshold is 25 db. ReferenceFigure 7 As shown, the common reselection priority of frequency point 4 is 1, and the dedicated reselection priority of frequency point 4 is not included in the RRC release connection message, resulting in the reselection priority of frequency point 4 being 0. The reselection priority of the serving cell (belonging to frequency point 1) is 2.

[0169] The signal quality of target cell 4 corresponding to frequency point 4 is -81 dB, and the signal quality of the serving cell is (-110 dB). Among non-serving cells with the same reselection priority, there is no non-serving cell with a signal quality higher than that of the serving cell. For example, the signal quality of non-serving cell 1 corresponding to frequency point 2 is -115 dB, and the signal quality of non-serving cell 2 corresponding to frequency point 3 is -118 dB. The signal quality S2 (-81 dB) of the target cell (non-serving cell 4) is greater than the signal quality S1 (-110 dB) of the serving cell, and the difference value between the signal quality S2 (-81 dB) of target cell 4 and the signal quality S1 (-110 dB) of the serving cell is 29 dB, which is greater than the preset third difference threshold (25 dB).

[0170] In this case, the mobile terminal can directly determine the reselection priority of frequency point 4 as the third priority. For example, the third priority can be the reselection priority of the serving cell (2), or the third priority can be a priority higher than the reselection priority of the serving cell (3).

[0171] In this embodiment, the mobile terminal can directly increase the reselection priority of the target cell to be higher than or equal to the reselection priority of the frequency point to which the serving cell belongs, so that the target cell with a higher signal quality can be considered by the mobile terminal for cell reselection, avoiding the situation where the mobile terminal fails to reselect a cell with good signal quality but low reselection priority during cell reselection, improving the effectiveness of cell reselection of the mobile terminal, and ensuring that the cell accessed by the mobile terminal after cell reselection is a cell with a higher signal quality.

[0172] S205. The mobile terminal performs cell reselection based on the frequency point to which the target cell belongs after the reselection priority is increased, and the priorities of the frequency points to which other non-serving cells belong.

[0173] In this embodiment, the priorities of the frequency point to which the target cell belongs after the reselection priority is increased, and the frequency points to which other non-serving cells belong can refer to Figures 4 - 7 the example of adjusting the reselection priority in

[0174] If the reselection priority of the target cell is not increased, the signal quality of the non-serving cell 3 (target cell) is -81 dB, which is less than the preset second signal threshold (-80 dB) and does not meet the low-priority reselection condition. Then, the mobile terminal will perform cell reselection among the non-serving cell 1 and the non-serving cell 2. The signal quality of the non-serving cell 1 is -115 dB and the signal quality of the non-serving cell 2 is -118 dB, which means that the mobile terminal cannot select a cell with better signal quality.

[0175] After the reselection priority of the target cell is increased, the reselection priority of the non-serving cell 3 (target cell) is 2 or 3, which is equal to or higher than the reselection priority of the serving cell. In this case, the mobile terminal can perform cell reselection from the non-serving cell 1, the non-serving cell 2, and the non-serving cell 3 based on the R criterion or the high-priority reselection rule. Then, the mobile terminal may select the non-serving cell 3 with better signal quality, improving the effectiveness of the cell reselection of the mobile terminal, ensuring that the cell accessed by the mobile terminal after cell reselection is a cell with higher signal quality, and can provide higher network quality, communication quality, etc. for the mobile terminal, optimizing the user experience.

[0176] In this embodiment, when the mobile terminal performs cell reselection based on the reselection priorities corresponding to each cell, it can first detect the signal quality of each cell. If there is a target cell whose reselection priority is lower than the reselection priority of the serving cell of the mobile terminal and does not meet the low-priority reselection condition, the signal quality difference result between the target cell and the serving cell can be further determined. When the signal quality of the target cell is better than the signal quality of the serving cell, the reselection priority of the target cell can be increased, so that the mobile terminal may reselect to the target cell with higher signal quality. For example, the reselection priority of cell 1 is lower than the reselection priority of the serving cell, but the signal quality of cell 1 is less than the preset second signal threshold and does not meet the low-priority reselection condition. The mobile terminal further determines that the signal quality of cell 1 is better than the signal quality of the serving cell. In this case, the reselection priority of cell 1 is increased, providing a cell alternative with a higher reselection priority and higher signal quality for the mobile terminal. This application can prevent the mobile terminal from failing to reselect to a cell with good signal quality but low reselection priority during cell reselection, improving the effectiveness of the cell reselection of the mobile terminal, and ensuring that the cell accessed by the mobile terminal after cell reselection is a cell with higher signal quality.

[0177] In order not to affect the services being executed by the mobile terminal or the communication quality of the mobile terminal, in some embodiments, when the mobile terminal is in the idle state, the mobile terminal detects the signal quality of each cell.

[0178] In this embodiment, the mobile terminal is in the RRC idle state, which means that the mobile terminal is not communicating with the network. In this state, it is possible to trigger the measurement of each cell to obtain the measurement results of the signal quality of each cell. Measuring the signal quality of each cell when the mobile terminal is in the idle state can reduce the impact of cell measurement on the mobile terminal services, and at the same time provide more communication resources for cell measurement.

[0179] In some embodiments, if the signal quality of the serving cell of the mobile terminal is relatively poor, it will also trigger the mobile terminal to perform cell measurement.

[0180] In some embodiments, when the signal quality of the serving cell is less than a preset third signal threshold, the mobile terminal detects the signal quality of each cell; the preset third signal threshold is greater than the preset first signal threshold.

[0181] In this embodiment, the third signal threshold can be understood as the upper limit value of the serving cell measurement. If the signal quality of the serving cell is lower than the upper limit value of the serving cell measurement, it means that the signal quality of the serving cell has deteriorated, and it can trigger cell measurement and reselection to reside in a cell with better signal quality. The third signal threshold is different from the first signal threshold in the above embodiment. The first signal threshold can be understood as triggering the mobile terminal to perform cell reselection from a cell with a lower reselection priority. Generally, when the quality result of the serving cell is relatively poor, the signal quality of the cell with a lower reselection priority than the serving cell is considered for detection. Therefore, the first signal threshold is less than the third signal threshold. Exemplarily, the first signal threshold can be -100 dB, and the third signal threshold can be -80 dB.

[0182] In this embodiment, when the signal quality of the serving cell is less than the third signal threshold, it can trigger the mobile terminal to detect the signal quality of each cell, so that the mobile terminal can switch to a cell with higher signal quality in time, ensure the communication quality of the mobile terminal and the network fluency of other services, and optimize the user's communication experience.

[0183] A cell reselection method provided by an embodiment of the present application can be applied to a mobile terminal. Exemplarily, Figure 8 FIG. shows a schematic structural diagram of a mobile terminal 100.

[0184] The mobile terminal 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a sensor module 180, and a subscriber identification module (SIM) card interface 190, etc.

[0185] It can be understood that the structure schematically shown in the embodiments of the present invention does not constitute a specific limitation on the mobile terminal 100. In other embodiments of the present application, the mobile terminal 100 may include more or fewer components than those shown in the figure, or combine certain components, or split certain components, or have different component arrangements. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0186] The processor 110 may include one or more processing units. For example, the processor 110 may include an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a memory, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Among them, different processing units may be independent devices or integrated in one or more processors.

[0187] Among them, the controller may be the nerve center and command center of the mobile terminal 100. The controller may generate operation control signals according to the instruction operation code and timing signals to complete the control of fetching and executing instructions.

[0188] A memory may also be provided in the processor 110 for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. This memory may save the instructions or data that the processor 110 has just used or recycled. If the processor 110 needs to use the instruction or data again, it can directly call it from the memory. This avoids repeated accesses, reduces the waiting time of the processor 110, and thus improves the efficiency of the system.

[0189] In some embodiments, the processor 110 may include one or more interfaces. The interfaces may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a subscriber identity module (SIM) interface, and / or a universal serial bus (USB) interface, etc.

[0190] It can be understood that the interface connection relationships between the modules illustrated in the embodiments of the present invention are only illustrative descriptions and do not constitute a structural limitation on the mobile terminal 100. In other embodiments of the present application, the mobile terminal 100 may also adopt different interface connection methods in the above embodiments, or a combination of multiple interface connection methods.

[0191] The charging management module 140 is configured to receive a charging input from a charger. The charger may be a wireless charger or a wired charger. In some embodiments of wired charging, the charging management module 140 may receive the charging input from the wired charger through the USB interface 130. In some embodiments of wireless charging, the charging management module 140 may receive the wireless charging input through the wireless charging coil of the mobile terminal 100. While charging the battery 142, the charging management module 140 may also supply power to the mobile terminal through the power management module 141.

[0192] The power management module 141 is used to connect the battery 142, the charging management module 140 and the processor 110. The power management module 141 receives the inputs from the battery 142 and / or the charging management module 140 and supplies power to the processor 110, the internal memory 121, the external memory, the wireless communication module 160, etc. The power management module 141 may also be used to monitor parameters such as the battery capacity, the number of battery cycles, and the battery health status (leakage, impedance). In some other embodiments, the power management module 141 may also be disposed in the processor 110. In some other embodiments, the power management module 141 and the charging management module 140 may also be disposed in the same device.

[0193] The wireless communication function of the mobile terminal 100 can be implemented by antenna 1, antenna 2, the mobile communication module 150, the wireless communication module 160, the modulation and demodulation processor, and the baseband processor, etc.

[0194] Antenna 1 and antenna 2 are used for transmitting and receiving electromagnetic wave signals. Each antenna in the mobile terminal 100 can be used to cover a single or multiple communication frequency bands. Different antennas can also be multiplexed to improve the utilization rate of the antennas. For example, antenna 1 can be multiplexed as the diversity antenna of the wireless local area network. In some other embodiments, the antenna can be used in combination with a tuning switch.

[0195] The mobile communication module 150 can provide solutions for wireless communications such as 2G / 3G / 4G / 5G applied on the mobile terminal 100. The mobile communication module 150 can include at least one filter, switch, power amplifier, low noise amplifier (LNA), etc. The mobile communication module 150 can receive electromagnetic waves through antenna 1, filter, amplify, etc. the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation. The mobile communication module 150 can also amplify the signal modulated by the modulation and demodulation processor and convert it into electromagnetic waves through antenna 1 for radiation. In some embodiments, at least some functional modules of the mobile communication module 150 can be provided in the processor 110. In some embodiments, at least some functional modules of the mobile communication module 150 and at least some modules of the processor 110 can be provided in the same device.

[0196] The modulation and demodulation processor can include a modulator and a demodulator. Among them, the modulator is used to modulate the low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is used to demodulate the received electromagnetic wave signal into a low-frequency baseband signal. Subsequently, the demodulator transmits the demodulated low-frequency baseband signal to the baseband processor for processing. After being processed by the baseband processor, the low-frequency baseband signal is transmitted to the application processor. The application processor outputs sound signals through an audio device (not limited to speakers, receivers, etc.), or displays images or videos through a display screen. In some embodiments, the modulation and demodulation processor can be an independent device. In some other embodiments, the modulation and demodulation processor can be independent of the processor 110 and be provided in the same device as the mobile communication module 150 or other functional modules.

[0197] The wireless communication module 160 may provide solutions for wireless communications applied to the mobile terminal 100, including wireless local area networks (WLANs) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared (IR), etc. The wireless communication module 160 may be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2, performs frequency modulation and filtering processing on the electromagnetic wave signals, and sends the processed signals to the processor 110. The wireless communication module 160 may also receive signals to be sent from the processor 110, perform frequency modulation on them, amplify them, and convert them into electromagnetic waves through the antenna 2 for radiation.

[0198] In some embodiments, the antenna 1 of the mobile terminal 100 is coupled to the mobile communication module 150, and the antenna 2 is coupled to the wireless communication module 160, so that the mobile terminal 100 can communicate with the network and other devices through wireless communication technologies. The wireless communication technologies may include GSM, general packet radio service (GPRS), code division multiple access (CDMA), WCDMA, time-division code division multiple access (TD-SCDMA), LTE, BT, GNSS, WLAN, NFC, FM, and / or IR technologies, etc. The GNSS may include global positioning system (GPS), global navigation satellite system (GLONASS), beidou navigation satellite system (BDS), quasi-zenith satellite system (QZSS), and / or satellite based augmentation systems (SBAS).

[0199] In this embodiment, the system message broadcast by the radio access network and the RRC connection release message sent by the base station can be received through the mobile communication module or the wireless communication module. When performing cell reselection, the processor 110 can perform cell measurement through the mobile communication module or the wireless communication module, and the processor 11O performs an operation to increase the reselection priority of the target cell based on the measurement results of each cell, the system message, and the reselection priority of the frequency points carried in the RRC connection release message.

[0200] The external memory interface 120 can be used to connect to an external memory card, such as a Micro SD card, to implement the storage capacity expansion of the mobile terminal 100. The external memory card communicates with the processor 110 through the external memory interface 120 to implement the data storage function. For example, files such as music and videos are saved in the external memory card.

[0201] The internal memory 121 can be used to store computer-executable program codes, and the executable program codes include instructions. The processor 110 executes various functional applications and data processing of the mobile terminal 100 by running the instructions stored in the internal memory 121. The internal memory 121 can include a program storage area and a data storage area. Among them, the program storage area can store the operating system, application programs required for at least one function (such as the sound playback function, the image playback function, etc.). The data storage area can store the data created during the use of the mobile terminal 100 (such as audio data, phone book, etc.). In addition, the internal memory 121 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc.

[0202] The mobile terminal 100 can implement audio functions through the audio module 170, the speaker, the receiver, the microphone, the headphone interface, and the application processor. For example, music playback, recording, etc.

[0203] The audio module 170 is used to convert digital audio information into an analog audio signal for output, and is also used to convert an analog audio input into a digital audio signal. The audio module 170 can also be used to encode and decode audio signals. In some embodiments, the audio module 170 can be disposed in the processor 110, or some functional modules of the audio module 170 can be disposed in the processor 110.

[0204] The SIM card interface 190 is used to connect to the SIM card. The SIM card can be inserted into or removed from the SIM card interface 190 to achieve contact and separation from the mobile terminal 100. The mobile terminal 100 can support one or N SIM card interfaces, where N is a positive integer greater than 1. The SIM card interface 190 can support Nano SIM cards, Micro SIM cards, SIM cards, etc. Multiple cards can be inserted into the same SIM card interface 190 simultaneously. The types of the multiple cards can be the same or different. The SIM card interface 190 can also be compatible with different types of SIM cards. The SIM card interface 190 can also be compatible with external memory cards. The mobile terminal 100 interacts with the network through the SIM card to implement functions such as calls and data communication. In some embodiments, the mobile terminal 100 uses an eSIM, that is, an embedded SIM card. The eSIM card can be embedded in the mobile terminal 100 and cannot be separated from the mobile terminal 100.

[0205] An embodiment of the present application further provides a chip system (for example, a system on a chip (SoC)), as Figure 9 shown. The chip system includes at least one processor 701 and at least one interface circuit 702. The processor 701 and the interface circuit 702 can be interconnected by a line. For example, the interface circuit 702 can be used to receive signals from other devices (such as the memory of the mobile terminal). For another example, the interface circuit 702 can be used to send signals to other devices (such as the processor 701 or the camera of the mobile terminal). Exemplarily, the interface circuit 702 can read the instructions stored in the memory and send the instructions to the processor 701. When the instructions are executed by the processor 701, the mobile terminal can execute the various steps in the above embodiments. Of course, the chip system can also include other discrete devices, and the embodiments of the present application do not make specific limitations on this.

[0206] An embodiment of the present application further provides a computer-readable storage medium, which includes computer instructions. When the computer instructions run on the above mobile terminal, the mobile terminal is caused to execute the various functions or steps executed by the mobile terminal in the above method embodiments.

[0207] An embodiment of the present application further provides a computer program product. When the computer program product runs on a computer, the computer is caused to execute the various functions or steps executed by the mobile terminal in the above method embodiments. For example, the computer can be the above mobile terminal.

[0208] From the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above functional modules is used as an example. In actual applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

[0209] In several embodiments provided in the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in electrical, mechanical or other forms.

[0210] The units described as separate components may or may not be physically separated. The components displayed as units may be one physical unit or multiple physical units, that is, they can be located in one place, or they can be distributed to multiple different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0211] In addition, in each embodiment of the present application, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0212] If the above integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiments of the present application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. The software product is stored in a storage medium and includes several instructions to enable a device (which can be a single-chip microcomputer, a chip, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: USB flash drives, mobile hard disks, read only memory (ROM), random access memory (RAM), magnetic disks or optical discs and other various media that can store program codes.

[0213] The above content is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application shall be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A cell reselection method, characterized in that, The method includes: The mobile terminal obtains the reselection priorities of each cell. The mobile terminal detects the signal quality of each cell. When the reselection priority of the target cell is lower than the reselection priority of the serving cell of the mobile terminal, and the target cell does not meet the low-priority reselection condition, obtain the signal difference result of the target cell; the target cell is any non-serving cell other than the serving cell among the cells, and the target cell not meeting the low-priority reselection condition includes that the signal quality of the serving cell is greater than or equal to a preset first signal threshold, and / or the signal quality of the target cell is less than a preset second signal threshold. When the signal difference result indicates that the signal quality of the target cell is greater than the signal quality of the serving cell, increase the reselection priority of the frequency band to which the target cell belongs. The mobile terminal performs cell reselection based on the frequency band to which the target cell with increased reselection priority belongs and the priorities of the frequency bands to which other non-serving cells belong.

2. The method according to claim 1, characterized in that, The system message of the mobile terminal includes the frequency band to which the target cell belongs and the first priority of the frequency band to which the target cell belongs, the dedicated signaling of the mobile terminal does not include the frequency band to which the target cell belongs, the reselection priority of the target cell is a preset priority, and the first priority is higher than the preset priority. When the signal difference result indicates that the signal quality of the target cell is greater than the signal quality of the serving cell, increasing the reselection priority of the frequency band to which the target cell belongs includes: When the signal difference result indicates that the signal quality of the target cell is greater than the signal quality of the serving cell, and the difference value between the signal quality of the target cell and the signal quality of the serving cell is greater than a preset first difference threshold, the mobile terminal determines the reselection priority of the target cell as the first priority.

3. The method according to claim 1 or 2, characterized in that, The system message of the mobile terminal includes the frequency band to which the target cell belongs and the first priority of the frequency band to which the target cell belongs, the dedicated signaling of the mobile terminal does not include the frequency band to which the target cell belongs, the reselection priority of the target cell is a preset priority, and the first priority is higher than the preset priority. When the signal difference result indicates that the signal quality of the target cell is greater than the signal quality of the serving cell, increasing the reselection priority of the frequency band to which the target cell belongs includes: When the signal difference result indicates that the signal quality of the target cell is greater than the signal quality of the serving cell, and the difference value between the signal quality of the target cell and the signal quality of the serving cell is greater than a preset second difference threshold, if the first priority is less than the reselection priority of the serving cell, the mobile terminal determines the reselection priority of the target cell as the reselection priority of the serving cell.

4. The method according to any one of claims 1-3, characterized in that, The dedicated signaling of the mobile terminal includes the frequency band to which the target cell belongs and the second priority of the frequency band to which the target cell belongs; the second priority is less than the reselection priority of the serving cell. When the signal difference result indicates that the signal quality of the target cell is greater than that of the serving cell, promoting the reselection priority of the frequency point of the target cell includes: When the signal difference result indicates that the signal quality of the target cell is greater than that of the serving cell, and the difference value between the signal quality of the target cell and that of the serving cell is greater than a preset third difference threshold, the mobile terminal determines the reselection priority of the target cell as the reselection priority of the serving cell.

5. The method according to any one of claims 1-4, characterized in that, When the signal difference result indicates that the signal quality of the target cell is greater than that of the serving cell, promoting the reselection priority of the frequency point of the target cell includes: When the signal difference result indicates that the signal quality of the target cell is greater than that of the serving cell, and the difference value between the signal quality of the target cell and that of the serving cell is greater than a preset fourth difference threshold, the mobile terminal determines the reselection priority of the target cell as the third priority, and the third priority is higher than or equal to the reselection priority of the serving cell.

6. The method according to any one of claims 1-5, characterized in that, The system message of the mobile terminal includes a first frequency point set, and the dedicated instruction of the mobile terminal includes a second frequency point set. At least the frequency point to which the serving cell belongs is included in the intersection of the first frequency point set and the second frequency point set; The mobile terminal detecting the signal quality of each cell includes: The mobile terminal detecting the signal quality of the cells covered by the first frequency point set; The mobile terminal detecting the signal quality of the cells covered by the second frequency point set.

7. The method according to any one of claims 1-6, characterized in that, The mobile terminal detecting the signal quality of each cell includes: When the signal quality of the serving cell is less than a preset third signal threshold, the mobile terminal detects the signal quality of each cell; the preset third signal threshold is greater than the preset first signal threshold.

8. The method according to any one of claims 1-7, characterized in that, The mobile terminal detecting the signal quality of each cell includes: When the mobile terminal is in the idle state, the mobile terminal detects the signal quality of each cell.

9. The method according to any one of claims 1-8, characterized in that, The system message of the mobile terminal includes the fourth priority of each frequency point in the first frequency point set, and the dedicated signaling of the mobile terminal includes the fifth priority of each frequency point in the second frequency point set; The mobile terminal obtaining the reselection priority of each cell includes: If the first frequency point is included in both the first frequency point set and the second frequency point set, the reselection priority of the first frequency point is the fifth priority of the first frequency point; If the second frequency point is included in the first frequency point set and not included in the second frequency point set, the reselection priority of the second frequency point is a preset priority; Wherein, the preset priority is less than the fifth priority, the preset priority is less than the fourth priority, and the preset priority is less than the reselection priority of the serving cell.

10. A mobile terminal, characterized in that The mobile terminal includes a communication interface, a memory, and one or more processors; the communication interface, the memory are coupled to the processor; computer program code is stored in the memory, and the computer program code includes computer instructions, when the computer instructions are executed by the processor, the mobile terminal is caused to execute the method according to any one of claims 1-9.

11. A computer-readable storage medium, characterized in that including computer instructions, when the computer instructions are run on the mobile terminal, the mobile terminal is caused to execute the method according to any one of claims 1-9.

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