CN117750457A

CN117750457A - Cell switching method and device, electronic equipment, storage medium and chip

Info

Publication number: CN117750457A
Application number: CN202311516900.7A
Authority: CN
Inventors: 庄旭东; 陈龙
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2023-11-14
Filing date: 2023-11-14
Publication date: 2024-03-22

Abstract

The disclosure relates to a cell switching method, a cell switching device, an electronic device, a storage medium and a chip, and relates to the technical field of mobile terminals, wherein the method comprises the following steps: in response to receiving a cell reselection indication sent by the network device, determining a first target cell to be switched according to the cell reselection indication; determining a target level threshold according to a cell determination result of the first target cell; and under the condition that the cell receiving level value corresponding to the first target cell is larger than or equal to the target level threshold value, switching the terminal from the current service cell to the first target cell. In this way, when the first target cell to be switched for many times occurs in the terminal is the designated cell, the target level threshold is gradually adjusted so that the cell receiving level value corresponding to the first target cell is smaller than the target level threshold, and the terminal can not be switched from the current serving cell to the first target cell at this time, so that the number of times that the terminal is awakened from the standby state is reduced, and the standby power consumption is reduced.

Description

Cell switching method and device, electronic equipment, storage medium and chip

Technical Field

The disclosure relates to the technical field of mobile terminals, and in particular relates to a cell switching method, a cell switching device, electronic equipment, a storage medium and a chip.

Background

When the user identification card of the terminal is in the limited service state, if the cell resided in at the moment is not the highest-standard cell, the network is regulated according to the protocol to instruct the terminal to switch to the higher-standard cell. However, if the switched cell does not support the emergency call service, the situation of reselection failure between two types of cells, i.e., inter-RAT Cell Reselection (English: cross-system cell reselection), will cause frequent awakening of the terminal in standby state, and affect standby power consumption.

Disclosure of Invention

In order to overcome the problems in the related art, the present disclosure provides a cell handover method, apparatus, electronic device, storage medium, and chip.

According to a first aspect of embodiments of the present disclosure, there is provided a method for handover of a cell, the method including:

in response to receiving a cell reselection indication sent by a network device, determining a first target cell to be switched according to the cell reselection indication;

determining a target level threshold according to a cell determination result of the first target cell; the cell determination result characterizes whether the first target cell is a designated cell or not; the designated cell is a cell which does not support the target service;

Determining a cell receiving level value corresponding to the first target cell;

and switching the terminal from the current serving cell to the first target cell under the condition that the cell receiving level value is larger than or equal to the target level threshold value.

Optionally, the determining the target level threshold according to the cell determination result of the first target cell includes:

under the condition that the cell determination result represents that the first target cell is the designated cell, a designated level threshold is increased, the increased designated level threshold is used as the target level threshold, and the designated level threshold is a level threshold corresponding to the cell switching of the terminal last time; or,

and taking the specified level threshold value as the target level threshold value when the cell determination result indicates that the first target cell is not the specified cell.

Optionally, the cell determination result of the first target cell is determined by:

acquiring first cell identification information corresponding to the designated cell from a preset cell set of the terminal; the preset cell set comprises cell identification information of a designated cell corresponding to the terminal;

Determining second cell identification information corresponding to the first target cell;

and determining a cell determination result of the first target cell according to the first cell identification information and the second cell identification information.

Optionally, the determining, according to the first cell identification information and the second cell identification information, a cell determination result of the first target cell includes:

determining that the cell determination result includes that the first target cell is the designated cell under the condition that the first cell identification information and the second cell identification information are the same; or,

and determining that the cell determination result comprises that the first target cell is not the designated cell in the case that the first cell identification information and the second cell identification information are not the same.

Optionally, the method further comprises:

after the terminal is switched to the first target cell from the current service cell, if the first target cell is determined not to support the target service, the second cell identification information is stored in a preset cell set of the terminal.

Optionally, the target service includes an emergency call service, and the determining, in response to receiving a cell reselection indication sent by the network device, the first target cell to be handed over according to the cell reselection indication includes:

And under the condition that the user identity identification card of the terminal is in a limited service state, if a cell reselection instruction sent by the network equipment is received, determining a first target cell to be switched according to the cell reselection instruction.

Optionally, the method further comprises:

if the cell receiving level value is smaller than the target level threshold value, keeping the terminal to stay in the current service cell; or,

and under the condition that the cell receiving level value is smaller than the target level threshold value, acquiring candidate cells except the first target cell in the preset range of the terminal, determining a second target cell from the candidate cells, and switching the terminal from the current service cell to the second target cell.

According to a second aspect of embodiments of the present disclosure, there is provided a handover apparatus of a cell, the apparatus comprising:

a first determining module configured to determine a first target cell to be switched according to a cell reselection indication sent by a network device in response to receiving the cell reselection indication;

a second determining module configured to determine a target level threshold according to a cell determination result of the first target cell; the cell determination result characterizes whether the first target cell is a designated cell or not; the designated cell is a cell which does not support the target service;

A third determining module configured to determine a cell reception level value corresponding to the first target cell;

and the switching module is configured to switch the terminal from the current serving cell to the first target cell under the condition that the cell receiving level value is greater than or equal to the target level threshold value.

Optionally, the second determining module is configured to raise a specified level threshold when the cell determination result characterizes that the first target cell is the specified cell, and take the raised specified level threshold as the target level threshold, where the specified level threshold is a level threshold corresponding to when the terminal performs cell handover last time; or, in a case that the cell determination result characterizes that the first target cell is not the specified cell, the specified level threshold is taken as the target level threshold.

acquiring first cell identification information corresponding to the designated cell from a preset cell set of the terminal; the preset cell set comprises cell identification information of a designated cell corresponding to the terminal; determining second cell identification information corresponding to the first target cell; and determining a cell determination result of the first target cell according to the first cell identification information and the second cell identification information.

Optionally, the determining, according to the first cell identification information and the second cell identification information, a cell determination result of the first target cell includes: determining that the cell determination result includes that the first target cell is the designated cell under the condition that the first cell identification information and the second cell identification information are the same; or, in the case that the first cell identification information and the second cell identification information are different, determining that the cell determination result includes that the first target cell is not the specified cell.

Optionally, the apparatus further comprises:

and the storage module is configured to store the second cell identification information into a preset cell set of the terminal if the first target cell is determined not to support the target service after the terminal is switched from the current serving cell to the first target cell.

Optionally, the target service includes an emergency call service, and the first determining module is configured to determine, when the user identification card of the terminal is in the service limiting state, a first target cell to be switched according to a cell reselection instruction sent by the network device if the cell reselection instruction is received.

Optionally, the handover module is further configured to keep the terminal to stay in the current serving cell if the cell reception level value is smaller than the target level threshold; or under the condition that the cell receiving level value is smaller than the target level threshold value, acquiring candidate cells except the first target cell in the preset range of the terminal, determining a second target cell from the candidate cells, and switching the terminal from the current service cell to the second target cell.

According to a third aspect of embodiments of the present disclosure, there is provided an electronic device, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to implement the steps of the cell handover method provided by the first aspect of the present disclosure when invoking executable instructions stored on the memory.

According to a fourth aspect of embodiments of the present disclosure, there is provided a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the cell handover method provided by the first aspect of the present disclosure.

According to a fifth aspect of embodiments of the present disclosure, there is provided a chip comprising a processor and an interface; the processor is configured to read the instructions to perform the steps of the method for handover of a cell provided in the first aspect of the present disclosure.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:

first, in response to receiving a cell reselection indication sent by a network device, a first target cell to be switched is determined according to the cell reselection indication. Then, determining a target level threshold according to a cell determination result of the first target cell; the cell determination result characterizes whether the first target cell is a designated cell or not; the designated cell is a cell that does not support the target service. Then, a cell reception level value corresponding to the first target cell is determined. And finally, under the condition that the cell receiving level value is larger than or equal to the target level threshold value, switching the terminal from the current service cell to the first target cell. By the technical scheme, before switching to the first target cell, whether the first target cell is a specified cell which does not support target service is determined. And then, dynamically adjusting the target level threshold according to the determined cell determination result. If the cell receiving level value corresponding to the first target cell is greater than or equal to the target level threshold, the terminal can be switched to the first target cell from the current service cell. In this way, when the first target cell which is to be switched for many times by the terminal is the designated cell, the target level threshold value is gradually adjusted, if the cell receiving level value corresponding to the first target cell is smaller than the target level threshold value, the condition that the first target cell does not accord with the reselection condition is indicated, and the terminal can not be switched from the current service cell to the first target cell, so that the number of times that the terminal is awakened from the standby state is reduced, and the standby power consumption is reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a flow chart illustrating a method of handover of a cell according to an exemplary embodiment.

Fig. 2 is a flow chart illustrating another method of cell handover according to an example embodiment.

Fig. 3 is a flow chart illustrating another method of cell handover according to an example embodiment.

Fig. 4 is a flow chart illustrating another method of cell handover according to an example embodiment.

Fig. 5 is an interactive flow chart illustrating a method of handover of a cell according to an exemplary embodiment.

Fig. 6 is a block diagram illustrating a handover apparatus of a cell according to an exemplary embodiment.

Fig. 7 is a block diagram of a handover apparatus of another cell according to an exemplary embodiment.

Fig. 8 is a block diagram of an electronic device, according to an example embodiment.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with aspects of the present disclosure.

The terms first, second and the like in the description and claims of the present application and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

In the description of the present disclosure, unless otherwise indicated, "a plurality" means two or more than two, and other adjectives are similar thereto; "at least one item", "an item" or "a plurality of items" or the like, refer to any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (a) may represent any number a; as another example, one (or more) of a, b, and c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural; "and/or" is an association relationship describing an association object, meaning that there may be three relationships, e.g., a and/or B, which may represent: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" indicates that the front-rear association object is an or relationship.

Before introducing the cell switching method, device, electronic equipment, storage medium and chip provided by the disclosure, application scenarios related to various embodiments of the disclosure are first described. In the practical application scenario, when the user identification (english: subscriber Identity Module; abbreviated: SIM) card of the terminal is in a restricted service state, the terminal may preferentially reside in a cell supporting an Emergency Call (english: EMC) service, for example, the current terminal resides in an LTE cell. At this time, according to the protocol, the network detects whether the current terminal is camping on the highest standard cell, for example, on the NR cell. If it is detected that the terminal is not resident in the highest-system cell, the network will send a cell reselection indication to instruct the terminal to switch to the higher-system cell.

Based on the above scenario, the inventor finds that after receiving the cell reselection instruction, the terminal switches to a cell with a higher system, and if it is determined that the switched cell does not support the emergency call service, the cell reselection is considered to be failed. In order to ensure the function of the terminal, the terminal is preferably switched back to the cell where the terminal was camped (i.e. the original camping LTE cell) before receiving the cell reselection indication. At this time, according to the protocol, since the terminal is not currently resident in the highest-standard cell, the network will continue to send the cell reselection instruction, and further continue to execute the cell reselection process. When the terminal performs cell reselection, the terminal selects a cell meeting the cell reselection condition (namely, the cell reselection criterion (S criterion)) that the Srxlev (cell reception level value) of the cell is larger than or equal to a preset value according to the protocol. If the network environment of the cells around the terminal is not changed, and the cells which do not support the emergency call service just meet the cell reselection condition, the terminal may always cycle the process of switching and residing in the cells and cell reselection failure. That is, the terminal may appear to camp on the same cell that does not support the emergency call service multiple times. And each time the terminal has a cell reselection failure, the terminal reports the result of the cell reselection failure to the AP (Application Processor) system, which is easy to cause the system to be awakened from the standby state for many times, and the standby power consumption of the whole machine is affected.

In order to solve the technical problems, the invention provides a cell switching method, a cell switching device, an electronic device, a storage medium and a chip, wherein before switching to a first target cell, whether the first target cell is a designated cell which does not support target service is determined. And then, dynamically adjusting the target level threshold according to the determined cell determination result. If the cell receiving level value corresponding to the first target cell is greater than or equal to the target level threshold, the terminal can be switched to the first target cell from the current service cell. In this way, when the first target cell which is to be switched for many times by the terminal is the designated cell, the target level threshold value is gradually adjusted, if the cell receiving level value corresponding to the first target cell is smaller than the target level threshold value, the condition that the first target cell does not accord with the reselection condition is indicated, and the terminal can not be switched from the current service cell to the first target cell, so that the number of times that the terminal is awakened from the standby state is reduced, and the standby power consumption is reduced.

The following describes specific embodiments of the present invention in detail with reference to the drawings.

Fig. 1 is a flowchart illustrating a method for handover of a cell, which is applied to a terminal (english: user Experience; abbreviated: UE), according to an exemplary embodiment, and as shown in fig. 1, the method may include the steps of:

In step S101, in response to receiving a cell reselection indication sent by the network device, a first target cell to be handed over is determined according to the cell reselection indication.

The cell reselection indication (CELL SELECT IND) is used for indicating system information and/or priority information of a cell to be switched by the terminal. The system information is a network system corresponding to the cell to be switched, and the priority information is the priority of the frequency band where the network system corresponding to the cell to be switched is located. The cell reselection indication may comprise, for example, a SIB (english: system Information Block; chinese: system information block) 24 message, the SIB24 message being used to indicate inter-frequency/NR neighbor cell reselection. The cell reselection indication may be a reselection indication sent by the network device to the terminal when it is determined that the cell in which the current terminal resides is not a cell with a preset network system/preset priority, so as to instruct the terminal to perform cell reselection.

In an actual application scenario, when the subscriber identity module card of the terminal is in a limited service state, the terminal needs to be switched to a cell supporting emergency call service to ensure the use function of the terminal. Typically, the terminal will reside in a cell supporting emergency call services. At this time, the network device may determine whether the cell in which the current terminal resides is a cell with a preset network system/preset priority, and if not, may send a cell reselection instruction to the terminal. If the terminal receives the cell reselection indication sent by the network device, the terminal may determine the first target cell to be switched according to the cell reselection indication.

For example, after receiving the cell reselection instruction sent by the network device, the terminal may detect, according to the content of the cell reselection instruction, cells in a surrounding preset range, so as to obtain one or more candidate cells. A first target cell from among the one or more candidate cells to which the terminal is to be handed over is determined. In general, in the case where the candidate cell includes a plurality of candidate cells, the candidate cell having the highest network signal quality may be regarded as the first target cell.

In step S102, a target level threshold is determined according to the cell determination result of the first target cell.

The cell determination result characterizes whether the first target cell is a designated cell, and the designated cell is a cell which does not support the target service. The target service may be, for example but not limited to, an emergency call service, i.e. EMC service. The designated cell may be a cell in which the terminal resides when a cell reselection failure occurs in a cell handover process in a history time recorded in the terminal. If the terminal is switched to the target cell according to the cell reselection indication, determining that the target cell does not support the target service, namely, considering that the cell reselection fails, and recording the cell identification information of the target cell, wherein the target cell is the designated cell.

In a practical scenario, it is not directly known whether a first target cell supports a target service before it is camped on the first target cell. Therefore, in this embodiment, by comparing with the first target cell recorded in the terminal in advance, it can be determined in advance whether the first target cell is likely to be a cell that does not support the target service before the handover.

For example, if the cell determination result indicates that the first target cell is a designated cell, it indicates that the terminal resides in the first target cell in the history time, and a cell reselection failure occurs, that is, the first target cell is a cell that does not support the target service. In this case, in order to avoid the cell reselection that may be repeated multiple times later, the specified level threshold may be increased correspondingly, where the specified level threshold is a level threshold corresponding to the cell switch performed by the terminal last time (that is, a cell reselection condition that needs to be met during the cell switch), and the increased specified level threshold is taken as the target level threshold. It can be appreciated that the decision condition in the cell reselection criteria in this embodiment is dynamically updated and can be flexibly adjusted according to the number of reselection failures.

And if the cell determination result indicates that the first target cell is not a designated cell, indicating that the first target cell is not resided in the historical time, or that the first target cell is resided in the historical time and is a cell supporting target service. At this time, the specified level threshold may be set as the target level threshold. It should be noted that, for the terminal performing the cell switch for the first time, the level threshold corresponding to the terminal when performing the cell switch for the last time may be a preset level threshold.

In step S103, a cell reception level value corresponding to the first target cell is determined.

The cell reception level value may be Srxlev (full name: serving Cell RXlevel; chinese: serving cell reception level), for example. As can be seen from the foregoing description, when performing cell reselection, the cell to be handed over needs to satisfy the cell reselection criterion (i.e., S criterion), so, in order to determine whether the cell quality of the first target cell to be handed over satisfies the requirement, the cell reception level value corresponding to the first target cell may be determined first.

In step S104, in the case where the cell reception level value is greater than or equal to the target level threshold, the terminal is handed over from the current serving cell to the first target cell.

In this step, if the cell reception level value is greater than or equal to the target level threshold, it indicates that the first target cell to be currently handed over satisfies the cell reselection criterion, and the terminal may be handed over from the currently camped serving cell to the first target cell.

In this embodiment, the target level threshold is not always a fixed value, but may be dynamically adjusted according to the cell determination result, and if the first target cell to be switched is a designated cell recorded by the terminal, the level threshold in the cell reselection criterion may be gradually increased to obtain the target level threshold as the number of reselections increases. In this way, when the target level threshold increases to a point where the cell reception level value of the first target cell no longer satisfies the cell reselection criterion, the terminal will not switch from the current serving cell to the first target cell. For example, if the cell reception level value is Srxle and the target level threshold is th_hign_p, the cell reselection criteria include: srxle is greater than or equal to th_hign_p. In this embodiment, if the first target cell is a designated cell, the level threshold is raised to obtain the target level threshold. As the number of reselection failures increases, the value of th_hign_p also changes dynamically and increases gradually. In this way, under the condition that the Srxle is unchanged, the first target cell does not meet the cell reselection criterion by dynamically adjusting the th_hign_p, and further, the first target cell is not switched. Therefore, the situation that the terminal is repeatedly resided in the cell which does not support the target service does not occur in a circulating mode, the system of the terminal is effectively reduced from being awakened from the dormant state, the standby power consumption is optimized, and the user experience is improved.

By adopting the method, before switching to the first target cell, whether the first target cell is a specified cell which does not support target service is determined. And then, dynamically adjusting the target level threshold according to the determined cell determination result. If the cell receiving level value corresponding to the first target cell is greater than or equal to the target level threshold, the terminal can be switched to the first target cell from the current service cell. In this way, when the first target cell which is to be switched for many times by the terminal is the designated cell, the target level threshold value is gradually adjusted, if the cell receiving level value corresponding to the first target cell is smaller than the target level threshold value, the condition that the first target cell does not accord with the reselection condition is indicated, and the terminal can not be switched from the current service cell to the first target cell, so that the number of times that the terminal is awakened from the standby state is reduced, and the standby power consumption is reduced.

As described in detail below with respect to the above step S102, as shown in fig. 2, the step S102 of determining the target level threshold according to the cell determination result of the first target cell may include the following steps:

in step S1021, in the case where the cell determination result indicates that the first target cell is the designated cell, the designated level threshold is raised, and the raised designated level threshold is used as the target level threshold.

The specified level threshold is a level threshold corresponding to the last time the terminal performs cell switching.

In some embodiments, the cell determination result may be determined by:

s1, acquiring first cell identification information corresponding to the designated cell from a preset cell set of the terminal.

The preset cell set includes cell identification information of a designated cell corresponding to the terminal. The cell identification information may include, for example, but not limited to, a cell identification and a frequency point of the cell.

S2, determining second cell identification information corresponding to the first target cell.

S3, determining a cell determination result of the first target cell according to the first cell identification information and the second cell identification information.

For example, in the case that the first cell identification information and the second cell identification information are the same, determining that the cell determination result includes that the first target cell is the specified cell; or, in the case that the first cell identification information and the second cell identification information are not identical, determining that the cell determination result includes that the first target cell is not the specified cell.

If the cell determination result characterizes the first target cell as a designated cell, it indicates that the terminal has been camping on the first target cell in a history time and a cell reselection failure occurs, but considering that the service supported by the first target cell may change, it is not determined that handover from the current serving cell to the first target cell is not performed directly according to the cell determination result at one time. The target level threshold is gradually changed by increasing the designated level threshold and taking the increased designated level threshold as the target level threshold, so that the whole reselection determination process is more reasonable and accords with the actual application scene.

For example, the specific level threshold may be increased by a preset threshold, or an increased value may be randomly generated within a preset value range, and the specific level threshold may be increased according to the increased value, or other methods capable of increasing the specific level threshold, which is not specifically limited in this disclosure.

In step S1022, in the case where the cell determination result characterizes that the first target cell is not the specified cell, the specified level threshold is taken as the target level threshold.

In this step, if the cell determination result indicates that the first target cell is not the designated cell, it indicates that the first target cell is not already camped in the history time, or that the first target cell is already camped and is a cell supporting the target service. In this case, the target level threshold does not need to be adjusted, and the level threshold corresponding to the cell handover last time of the terminal, that is, the designated level threshold may be used as the target level threshold.

Fig. 3 is a flow chart illustrating another method of handover of a cell, according to an exemplary embodiment, as shown in fig. 3, the method may further include the steps of:

in step S105, after the terminal is handed over from the current serving cell to the first target cell, if it is determined that the first target cell does not support the target service, the second cell identification information is stored in a preset cell set of the terminal.

Consider that in the actual application process, a situation may occur in which the terminal does not camp on the first target cell. At this time, after the handover and camping on the first target cell, it may be first determined whether the first target cell supports the target service, if the first target cell supports the target service, it indicates that the current first target cell meets the terminal use requirement, and the camping state is maintained. If the first target cell does not support the target service, it may be determined that the cell reselection fails, and in order to ensure that the cell which does not support the target service does not reside repeatedly in the subsequent reselection process, the second cell identification information of the first target cell may be stored in a preset cell set of the terminal.

Fig. 4 is a flowchart illustrating another method of handover of a cell, according to an exemplary embodiment, as shown in fig. 4, the method may further include the steps of:

in step S106, if the cell reception level value is smaller than the target level threshold, keeping the terminal to stay in the current serving cell; or under the condition that the cell receiving level value is smaller than the target level threshold value, acquiring candidate cells except the first target cell in the preset range of the terminal, determining a second target cell from the candidate cells, and switching the terminal from the current serving cell to the second target cell.

That is, when it is determined that the cell reception level value of the first target cell is smaller than the target level threshold, it may indicate that the current first target cell does not meet the cell reselection criterion, which may be due to poor cell signal quality of the first target cell or may be due to the terminal experiencing multiple cell reselection failures in a period of time. In case the first target cell does not meet the cell reselection criterion, in one possible implementation, the terminal may be kept continuously camping on the current serving cell, i.e. the cell reselection procedure is not initiated. In another possible implementation manner, it may be attempted to camp on other cells in the same network system and/or under the same priority level, so as to avoid a cycle of cell reselection failure, thereby reducing the number of times the terminal is awakened from the standby state, and reducing standby power consumption.

Fig. 5 is an interactive flow chart illustrating a method of handover of a cell, according to an exemplary embodiment, as shown in fig. 5, the method may include the steps of:

in step S201, the SIM card of the UE is in a restricted service state, camping on the LTE cell.

The LTE cell is a cell supporting emergency call service.

In step S202, the NW (Network) transmits a cell reselection instruction to the UE.

In some embodiments, the NW may detect whether the cell in which the UE currently resides is a cell of a preset network type and/or a preset priority, and if it is determined that the cell in which the UE currently resides is not a cell of a preset network type and/or a preset priority, send a cell reselection indication to the UE to instruct the UE to perform cell reselection.

In step S203, the UE determines a first NR cell to be handed over according to the cell reselection indication.

For example, after receiving the cell reselection indication, the UE searches a plurality of candidate cells within a preset range according to the content of the cell reselection indication, and determines a cell (for example, NR priority is 5 and lte priority is 2) with a frequency point priority of a specified cell indicated in the cell reselection indication from the plurality of candidate cells, that is, a first NR cell. At this time, the first NR cell may be regarded as a cell to be handed over.

In step S204, the UE switches from the currently camping LTE cell to the first NR cell if it is determined that the first NR cell satisfies the cell reselection condition.

The cell reselection condition may be, for example, a cell reselection criterion, that is, a cell reception level value is greater than or equal to a preset value. In this step, the UE may acquire a cell reception level value of the first NR cell, and further determine whether the cell reception level value of the first NR cell is greater than or equal to the preset value. And if the cell reselection condition is greater than or equal to the preset value, the cell reselection condition is met.

In step S205, it is determined that the first NR cell does not support the emergency call service, it is determined that the cell reselection fails, and the UE is handed over to the original LTE cell and camps.

In some embodiments, if it is determined that the cell reselection fails, the result of the cell reselection failure is reported to the AP in the UE, that is, the background system of the terminal. If the system is in a standby sleep state, the system is awakened from the standby state. If the cell reselection fails frequently, the system is frequently awakened for many times, and the standby power consumption of the whole machine is affected.

In step S206, the UE records cell identification information of the first NR cell and takes the first NR cell as a designated cell.

For example, the designated cell is a cell that does not support the emergency call service, and the designated cell may be stored in a preset cell set of the UE.

In step S207, the NW transmits a cell reselection indication to the UE.

According to the protocol, NW detects that the LTE cell in which the UE is currently camping is not a cell of a preset network type and/or a preset priority. At this time, the NW will send a cell reselection indication to the UE to instruct the UE to perform cell reselection.

In step S208, the UE determines a second NR cell to be handed over according to the cell reselection indication.

In this step, after receiving the cell reselection instruction, the UE searches for a plurality of candidate cells within a preset range according to the content of the cell reselection instruction, and determines a cell (for example, NR priority is 5 and lte priority is 2) with a frequency point priority of a designated cell indicated in the cell reselection instruction from the plurality of candidate cells, that is, a second NR cell. If the UE is not moving, the second NR cell is more likely to be the first NR cell in a shorter time, and the same cell that does not support the emergency call service will be camped multiple times.

In step S209, the UE determines whether the second NR cell is a designated cell, and if it is determined that the second NR cell is a designated cell, increases a preset value and updates a cell reselection condition.

In this step, it may be determined whether the second NR cell is the designated cell by comparing whether the cell identification information of the second NR cell and the cell identification information of the designated cell are the same. It will be appreciated that the updated cell reselection condition may include the cell reception level value being greater than or equal to the increased preset value.

In addition, if it is determined that the second NR cell is not the designated cell, the cell reselection condition is not updated.

In step S210, the UE determines whether the second NR cell satisfies a cell reselection condition.

For example, reference may be made to a method for determining whether the first NR cell satisfies the cell reselection condition, which is not described herein.

In step S211, in the case where it is determined that the second NR cell does not satisfy the cell reselection condition, keeping camping on the original LTE cell; or searching candidate cells except the second NR cell in the preset range, determining a third NR cell from the candidate cells except the second NR cell, and switching the UE from the original LTE cell to the third NR cell.

As the number of reselection failures increases, the preset value in the cell reselection conditions also changes dynamically, gradually increasing. In this way, when the cell reception level value is not changed, the preset value is dynamically adjusted, so that the second NR cell does not meet the cell reselection condition, and further, the second NR cell is not handed over. Therefore, the situation that the terminal is repeatedly resided in the cell which does not support the emergency call service does not occur any more, the system of the terminal is effectively reduced from being awakened from the dormant state, the standby power consumption is optimized, and the user experience is improved.

In step S212, if it is determined that the second NR cell satisfies the cell reselection condition, the UE is handed over from the original LTE cell to the second NR cell.

Fig. 6 is a block diagram of a handover apparatus for a cell, according to an example embodiment. As shown in fig. 6, the apparatus 300 includes:

a first determining module 301, configured to determine a first target cell to be switched according to a cell reselection indication sent by a network device in response to receiving the cell reselection indication;

A second determining module 302 configured to determine a target level threshold according to a cell determination result of the first target cell; the cell determination result characterizes whether the first target cell is a designated cell or not; the designated cell is a cell which does not support the target service;

a third determining module 303 configured to determine a cell reception level value corresponding to the first target cell;

a switching module 304 is configured to switch the terminal from the current serving cell to the first target cell if the cell reception level value is greater than or equal to the target level threshold.

Optionally, the second determining module 302 is configured to raise a specified level threshold when the cell determination result characterizes that the first target cell is the specified cell, and take the raised specified level threshold as the target level threshold, where the specified level threshold is a level threshold corresponding to when the terminal performs cell handover last time; alternatively, the specified level threshold is set as the target level threshold in a case where the cell determination result characterizes that the first target cell is not the specified cell.

Optionally, the determining the cell determination result of the first target cell according to the first cell identification information and the second cell identification information includes: determining that the cell determination result includes that the first target cell is the designated cell under the condition that the first cell identification information and the second cell identification information are the same; or, in the case that the first cell identification information and the second cell identification information are not identical, determining that the cell determination result includes that the first target cell is not the specified cell.

Optionally, as shown in fig. 7, the apparatus 300 further includes:

the storage module 305 is configured to store the second cell identification information into a preset cell set of the terminal if it is determined that the first target cell does not support the target service after the terminal is handed over from the current serving cell to the first target cell.

Optionally, the target service includes an emergency call service, and the first determining module 301 is configured to determine, if a cell reselection instruction sent by the network device is received and if the subscriber identity card of the terminal is in a service restriction state, a first target cell to be switched according to the cell reselection instruction.

Optionally, the handover module 304 is further configured to keep the terminal stay camping on the current serving cell if the cell reception level value is smaller than the target level threshold; or under the condition that the cell receiving level value is smaller than the target level threshold value, acquiring candidate cells except the first target cell in the preset range of the terminal, determining a second target cell from the candidate cells, and switching the terminal from the current serving cell to the second target cell.

By adopting the device, before switching to the first target cell, whether the first target cell is a specified cell which does not support target service is determined. And then, dynamically adjusting the target level threshold according to the determined cell determination result. If the cell receiving level value corresponding to the first target cell is greater than or equal to the target level threshold, the terminal can be switched to the first target cell from the current service cell. In this way, when the first target cell which is to be switched for many times by the terminal is the designated cell, the target level threshold value is gradually adjusted, if the cell receiving level value corresponding to the first target cell is smaller than the target level threshold value, the condition that the first target cell does not accord with the reselection condition is indicated, and the terminal can not be switched from the current service cell to the first target cell, so that the number of times that the terminal is awakened from the standby state is reduced, and the standby power consumption is reduced.

The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.

The present disclosure also provides a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the cell handover method provided by the present disclosure.

Fig. 8 is a block diagram of an electronic device 400, according to an example embodiment. For example, electronic device 400 may be a mobile phone, computer, digital broadcast terminal, messaging device, game console, tablet device, medical device, exercise device, personal digital assistant, or the like.

Referring to fig. 8, an electronic device 400 may include one or more of the following components: a processing component 402, a memory 404, a power component 406, a multimedia component 408, an audio component 410, an input/output interface 412, a sensor component 414, and a communication component 416.

The processing component 402 generally controls overall operation of the electronic device 400, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 402 may include one or more processors 420 to execute instructions to perform all or part of the steps of the cell handover method described above. Further, the processing component 402 can include one or more modules that facilitate interaction between the processing component 402 and other components. For example, the processing component 402 may include a multimedia module to facilitate interaction between the multimedia component 408 and the processing component 402.

The memory 404 is configured to store various types of data to support operations at the electronic device 400. Examples of such data include instructions for any application or method operating on electronic device 400, contact data, phonebook data, messages, pictures, videos, and the like. The memory 404 may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.

The power supply component 406 provides power to the various components of the electronic device 400. The power components 406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the electronic device 400.

The multimedia component 408 includes a screen between the electronic device 400 and the user that provides an output interface. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or slide action, but also the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 408 includes a front camera and/or a rear camera. When the electronic device 400 is in an operational mode, such as a shooting mode or a video mode, the front-facing camera and/or the rear-facing camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

The audio component 410 is configured to output and/or input audio signals. For example, the audio component 410 includes a Microphone (MIC) configured to receive external audio signals when the electronic device 400 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 404 or transmitted via the communication component 416. In some embodiments, audio component 410 further includes a speaker for outputting audio signals.

The input/output interface 412 provides an interface between the processing component 402 and peripheral interface modules, which may be a keyboard, click wheel, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.

The sensor assembly 414 includes one or more sensors for providing status assessment of various aspects of the electronic device 400. For example, the sensor assembly 414 may detect an on/off state of the electronic device 400, a relative positioning of the components, such as a display and keypad of the electronic device 400, the sensor assembly 414 may also detect a change in position of the electronic device 400 or a component of the electronic device 400, the presence or absence of a user's contact with the electronic device 400, an orientation or acceleration/deceleration of the electronic device 400, and a change in temperature of the electronic device 400. The sensor assembly 414 may include a proximity sensor configured to detect the presence of nearby objects in the absence of any physical contact. The sensor assembly 414 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 414 may also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 416 is configured to facilitate communication between the electronic device 400 and other devices, either wired or wireless. The electronic device 400 may access a wireless network based on a communication standard, such as WiFi,2G, or 3G, or a combination thereof. In one exemplary embodiment, the communication component 416 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 416 further includes a Near Field Communication (NFC) module to facilitate short range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the electronic device 400 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic elements for performing the above-described cell switching methods.

In an exemplary embodiment, a non-transitory computer readable storage medium is also provided, such as memory 404, including instructions executable by processor 420 of electronic device 400 to perform the above-described cell handover method. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

The electronic device may be a stand-alone electronic device or may be part of a stand-alone electronic device, for example, in one embodiment, the apparatus may be an integrated circuit (Integrated Circuit, IC) or a chip, where the integrated circuit may be an IC or may be a collection of ICs; the chip may include, but is not limited to, the following: GPU (Graphics Processing Unit, graphics processor), CPU (Central Processing Unit ), FPGA (Field Programmable Gate Array, programmable logic array), DSP (Digital Signal Processor ), ASIC (Application Specific Integrated Circuit, application specific integrated circuit), SOC (System on Chip, SOC, system on Chip or System on Chip), etc. The integrated circuit or the chip may be configured to execute executable instructions (or codes) to implement the cell handover method described above. The executable instructions may be stored on the integrated circuit or chip or may be retrieved from another device or apparatus, such as the integrated circuit or chip including a processor, memory, and interface for communicating with other devices. The executable instructions may be stored in the memory, which when executed by the processor, implement the cell handover method described above; alternatively, the integrated circuit or chip may receive the executable instructions through the interface and transmit the executable instructions to the processor for execution, so as to implement the cell handover method described above.

In another exemplary embodiment, a computer program product is also provided, comprising a computer program executable by a programmable apparatus, the computer program having code portions for performing the above-described cell handover method when executed by the programmable apparatus.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This disclosure is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains and as may be applied to the instant disclosure and as follows in the art to which the disclosure pertains and as follows in the art by merely exemplary embodiments.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof.

Claims

1. A method of cell handover, the method comprising:

2. The method of claim 1, wherein determining a target level threshold based on the cell determination of the first target cell comprises:

3. The method according to claim 1, wherein the cell determination result of the first target cell is determined by:

4. The method of claim 3, wherein the determining the cell determination result of the first target cell based on the first cell identification information and the second cell identification information comprises:

5. A method according to claim 3, characterized in that the method further comprises:

6. The method of claim 1, wherein the target service comprises an emergency call service, and wherein the determining the first target cell to be handed off based on the cell reselection indication in response to receiving the cell reselection indication sent by the network device comprises:

7. The method according to any one of claims 1 to 6, further comprising:

8. A handover apparatus for a cell, the apparatus comprising:

9. An electronic device, comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to implement the steps of the method of any one of claims 1 to 7 when invoking executable instructions stored on the memory.

10. A computer readable storage medium having stored thereon computer program instructions, which when executed by a processor, implement the steps of the method of any of claims 1 to 7.

11. A chip, comprising a processor and an interface; the processor is configured to read instructions to perform the method of any one of claims 1 to 7.