CN110022591B

CN110022591B - Cell selection method and terminal

Info

Publication number: CN110022591B
Application number: CN201810016679.1A
Authority: CN
Inventors: 鲍炜; 杨晓东; 刘思綦
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-01-08
Filing date: 2018-01-08
Publication date: 2021-03-02
Anticipated expiration: 2038-01-08
Also published as: CN110022591A

Abstract

The invention discloses a cell selection method and a terminal, wherein the method comprises the following steps: acquiring access auxiliary information carried in a synchronous signal block on a first frequency point; the access auxiliary information comprises indication information for indicating a second frequency point to be scanned next; and determining whether to scan the second frequency point according to the access auxiliary information and the frequency point scanning historical information. The terminal preferentially scans the access auxiliary information to determine the next second frequency point to be scanned, and because the second frequency point indicated by the access auxiliary information is the frequency point recommended by the network equipment and having higher probability of being suitable for accessing the cell, the efficiency of selecting the cell by the terminal can be improved, and the power consumption of the terminal is reduced. In addition, the terminal also determines whether to scan the second frequency point by combining the frequency point historical information, so that the terminal can be prevented from repeatedly scanning the scanned frequency points and cells, and the time delay and the power consumption in the processes of terminal search, cell selection and reselection can be further reduced.

Description

Cell selection method and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a cell selection method and a terminal.

Background

In the fifth generation (5)^thGeneration, 5G) communication system, or referred to as New Radio (NR) system, a network device needs to send a Synchronized Signal Block (SSB) for a terminal to perform synchronization, system information acquisition, measurement and evaluation, and the like. Wherein, an SSB is composed of a New Radio Synchronized Signal (NR-SS) and a New Radio Physical Broadcast Channel (NR-PBCH) Signal. The NR-SS is divided into a New air interface Primary Synchronized Signal (NR-PSS) and a New air interface Secondary Synchronized Signal (NR-SSS), and the generation of the NR-SS sequence and the Physical Cell Identifier (PCI) haveAnd with a fixed mapping relation, after the terminal detects the SSB, the terminal can obtain the PCI of the cell to which the currently detected SSB belongs by analyzing the NR-PSS and the NR-SSS in the SSB.

There are multiple synchronization grids (sync filters) in the frequency domain, where the sync filters are fixed frequency points, and each sync filter may have one or more cells transmitting SSBs at the same time or no cell transmitting SSBs. The SSB located on the sync raster and associated with the smallest Remaining System Information (RMSI) is referred to as the cell defining SSB. The association of the RMSI with the SSB means that a user may determine a Control Resource Set (Set) Resource of the RMSI and a PDCCH monitoring window of the RMSI according to Physical Downlink Control Channel configuration information (RMSI-PDCCH-config) of the RMSI carried in the SSB. Specifically, the NR-PBCH is configured to carry a system Master Information Block (MIB), where the MIB carries RMSI-PDCCH-config Information and SSB subcarrier offset (SSB-subcarrier-offset) Information. Wherein, the RMSI-PDCCH-config information comprises configuration information of RMSI CORESET and occupies 8 bits. The first 4 bits of the RMSI-PDCCH-config are used for the terminal to confirm the time domain duration, the frequency domain bandwidth, the multiplexing relationship between the frequency domain position and the SSB occupied by the search space (search space) of the type0PDCCH, and the frequency domain interval between the minimum Physical Resource Block (lowest PRB) of the RMSI CORESET and the lowest PRB of the SSB, and the last 4 bits are used for the terminal to determine the timing for monitoring the PDCCH, i.e., the position of the PDCCH monitoring window.

When the terminal performs cell selection, all radio frequency channels need to be scanned one by one to find a suitable cell for access. After a terminal searches SSB on a sync server of a certain radio frequency channel, if the SSB is detected to be associated with RMSI, the PDCCH monitoring of the RMSI can be carried out, so that the PDCCH for scheduling the RMSI is monitored in a monitoring window, and RMSI information is received according to the indication of the PDCCH. After receiving the RMSI, the user accesses the cell according to the information carried in the RMSI. However, when detecting that the SSB does not have an associated RMSI, the terminal cannot receive the RMSI through the SSB, and thus cannot access the cell. At this point, the next radio frequency channel needs to be scanned. When the cell selection is carried out, the sequence of the terminal scanning the radio frequency channel (RF channel) is not standardized, the power consumption of the terminal is large because auxiliary information provided by a network side is not available, and the time delay of searching and selecting the cell is long.

Disclosure of Invention

The embodiment of the invention provides a cell selection method and a terminal, which aim to solve the problem that in the prior art, when the terminal searches and selects a cell, the power consumption is high and the time is prolonged.

In a first aspect, an embodiment of the present invention provides a cell selection method, including:

acquiring access auxiliary information carried in a synchronous signal block on a first frequency point; the access auxiliary information comprises indication information for indicating a second frequency point to be scanned next;

and determining whether to scan the second frequency point according to the access auxiliary information and the frequency point scanning historical information.

In a second aspect, an embodiment of the present invention further provides a terminal, including:

the first acquisition module is used for acquiring access auxiliary information carried in a synchronous signal block on a first frequency point; the access auxiliary information comprises indication information for indicating a second frequency point to be scanned next;

and the first processing module is used for determining whether to scan the second frequency point according to the access auxiliary information and the frequency point scanning historical information.

In a third aspect, an embodiment of the present invention provides a cell selection method, including:

acquiring a cell access restriction information element (cellbar IE) and access auxiliary information in a synchronous signal block on a first frequency point; the access auxiliary information comprises indication information for indicating a second frequency point to be scanned next;

and if the cellbar IE indicates that the cell on the first frequency point is in the access limiting state, scanning the second frequency point according to the access auxiliary information.

In a fourth aspect, an embodiment of the present invention provides a terminal, including:

the acquisition module is used for acquiring cell access restriction information element (cellbar IE) and access auxiliary information in a synchronous signal block on a first frequency point; the access auxiliary information comprises indication information for indicating a second frequency point to be scanned next;

and the scanning module is used for scanning the second frequency point according to the access auxiliary information if the cellbar IE indicates that the cell on the first frequency point is in the access limiting state.

In a fifth aspect, an embodiment of the present invention provides a terminal, where the terminal includes a processor, a memory, and a computer program stored in the memory and operable on the processor, and the computer program, when executed by the processor, implements the steps of the cell selection method described above.

In a sixth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and the computer program, when executed by a processor, implements the steps of the cell selection method described above.

Therefore, the cell selection method and the terminal of the embodiment of the invention preferentially scan the access auxiliary information to determine the next second frequency point to be scanned, and because the second frequency point indicated by the access auxiliary information is the frequency point recommended by the network equipment and having higher probability of being suitable for accessing the cell, the cell selection efficiency of the terminal can be improved, and the power consumption of the terminal can be reduced. In addition, the terminal also determines whether to scan the second frequency point by combining the frequency point historical information, so that the terminal can be prevented from repeatedly scanning the scanned frequency points and cells, and the time delay and the power consumption in the processes of terminal search, cell selection and reselection can be further reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a flowchart illustrating a cell selection method according to an embodiment of the present invention;

fig. 2 is a schematic block diagram of a terminal according to an embodiment of the present invention;

FIG. 3 is a second flowchart of a cell selection method according to an embodiment of the present invention;

fig. 4 is a second schematic block diagram of a terminal according to an embodiment of the present invention;

fig. 5 shows a block diagram of a terminal according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

An embodiment of the present invention provides a cell selection method, as shown in fig. 1, the method may include the following steps:

step 11: and acquiring access auxiliary information carried in a synchronous signal block on the first frequency point.

The access auxiliary information comprises indication information for indicating a next second frequency point to be scanned, and the second frequency point is a frequency point which is recommended by the network equipment and has a higher probability of being suitable for accessing the cell.

In some embodiments, in the frequency band below 6GHz, the SSB subcarrier offset (SSB-subcarrier-offset) is 5 bits, and there are 32 code points; in the frequency band above 6GHz, the SSB-subcarrier-offset is 4 bits, and 16 code points are provided. For the frequency band below 6GHz, when the SSB-subcarrier-offset information takes on certain code points, it indicates that there is an offset (offset) between the SSB boundary and the physical resource block grid (PRB grid) in the frequency domain, i.e., there is a difference of n subcarriers (n may be 0) between the SSB boundary and the PRB grid, where the subcarriers are based on a subcarrier spacing of 15 kHz. For example, when the sub-carrier spacing (SCS) of the SSB is 15kHz and the SCS of the RMSI is 30kHz, the value of n ranges from 0 to 23. For the frequency band above 6GHz, when the SSB-subcarrier-offset information takes values of some code points, it indicates that offset exists on the frequency domain for the SSB boundary and the PRB grid, i.e., there is m subcarriers (m may be 0) between the SSB boundary and the data PRB grid, where the subcarriers are based on the subcarrier spacing of RMSI. For example, when the SCS of the SSB and the RMSI is 120kHz, the value range of m is 0-11. For an SSB with associated RMSI, the SSB carries SSB-subcarrier-offset information indicating frequency domain offset at the subcarrier level between the SSB boundary and the PRB grid, and the SSB carries RMSI-PDCCH-config information indicating configuration information of RMSI core.

For the frequency band below 6GHz, when the SSB-subcarrier-offset information takes on other code points (for example, 24-31), it indicates that the current SSB does not have RMSI associated therewith, and the RMSI-PDCCH-config information carried by the current SSB is not used for indicating the configuration information of RMSI CORESET, but points to a sync scanner by combining with the value of the SSB-subcarrier-offset information. For the frequency band above 6GHz, when the SSB-subarrier-offset information takes on other code points (for example, 12-15), it indicates that the current SSB does not have RMSI associated therewith, and the RMSI-PDCCH-config information carried by the current SSB is not used for indicating the configuration information of RMSI CORESET, but points to a sync scanner by combining with the value of the SSB-subarrier-offset information. The terminal may attempt to search for a cell defining SSB on the sync server to which the current SSB points. Therefore, after searching for an SSB, the terminal can determine that the current SSB has no associated RMSI by the SSB-subcarrier-offset value carried by the terminal. It is worth pointing out that the SSB in the first frequency bin is the SSB not associated with the RMSI.

Step 12: and determining whether to scan the second frequency point according to the access auxiliary information and the frequency point scanning historical information.

The order in which the terminal scans the RF channels is not standardized when performing cell selection. If the terminal scans the frequency point f1 first, a suitable cell (survivable cell) is not found for access; and scanning the frequency point f2, searching the strongest cell on the frequency point f2 by the terminal, finding that the SSB has no associated RMSI, and indicating the next second frequency point to be scanned by the access auxiliary information carried in the SSB, wherein in order to avoid the terminal from repeatedly scanning the scanned frequency points and cells, the terminal determines whether to scan the second frequency point by combining the frequency point scanning history information. For example, if the sync raster (indicating the next frequency point to be searched) indicated by the SSB corresponds to the frequency point f1 that has been searched, it is probably unnecessary if the terminal scans the frequency point f1 according to the indication. The cell selection method according to the embodiment of the present invention is further described below with reference to different application scenarios.

Scene one,

In this scenario, the access auxiliary information includes indication information indicating a next second frequency point to be scanned, and the second frequency point is a scanned historical frequency point.

Examples one,

Step 12 may include: and if the second frequency point indicated by the access auxiliary information is detected to be the scanned historical frequency point, ignoring the second frequency point.

Suppose that the terminal scans frequency point f1 and finds that the cell at frequency point f1 is not campeable or accessible, i.e., is not a viable cell. The terminal further scans the frequency point f2, finds that the cell on the frequency point f2 cannot reside or be accessed, but the SSB detected on the frequency point f2 indicates that the sync scanner (frequency point) to be scanned is f 1; since the frequency point f1 is a scanned historical frequency point, in order to avoid the terminal from repeatedly scanning the scanned frequency point, the terminal can ignore sync raster obtained on the SSB of the frequency point f2 and continue to scan other unscanned frequency points.

Alternatively, examples two,

Step 12 may include: if the second frequency point indicated by the access auxiliary information is detected to be a scanned historical frequency point, detecting a first time interval between the current time and the last scanning time of the second frequency point; if the first time interval is larger than a first preset interval threshold, scanning a second frequency point; and if the first time interval is smaller than a first preset interval threshold, ignoring the second frequency point. When the first time interval is equal to the first preset interval threshold, the second frequency point can be scanned, or the second frequency point is ignored.

Suppose that the terminal scans frequency point f1 and finds that the cell at frequency point f1 is not campeable or accessible, i.e., is not a viable cell. The terminal further scans the frequency point f2, finds that the cell on the frequency point f2 cannot reside or be accessed, but the SSB detected on the frequency point f2 indicates that the sync scanner (frequency point) to be scanned is f 1; although the frequency point f1 is a scanned historical frequency point, since the terminal location or the network configuration may have changed, the terminal may further determine whether to scan the second frequency point according to the last scanning time of the second frequency point indicated by the frequency point scanning historical information. If the time interval between the current time and the time when the terminal last scans the frequency point f1 is smaller than the first preset interval threshold T, the terminal ignores the sync filter obtained on the SSB of the frequency point f2, and continues to scan other unscanned frequency points. And if the time interval between the current moment and the moment when the terminal scans the frequency point f1 last time is greater than or equal to the first preset interval threshold T, the terminal scans the frequency point f1 according to the SSB indication of the frequency point f 2.

It is to be noted that, in the first and second examples, the frequency point f1 is scanned, which may be a cell with a signal strength exceeding a preset threshold at the frequency point f1, or a previous N cells with a strongest signal strength at the frequency point f1, where N is an integer greater than or equal to 1. This embodiment will be described by taking only an example of scanning a cell with the strongest signal strength at frequency point f 1. Similarly, the step of scanning the second frequency point may be: and scanning the cell with the strongest signal on the second frequency point. The following steps can be also included: and scanning the cells with the signal intensity exceeding the preset threshold value on the second frequency point, or scanning the first N cells with the strongest signal intensity on the second frequency point, wherein N is an integer greater than or equal to 1.

Scene two,

Considering that there may be multiple cells sending information in a target frequency point, the SSB may indicate the PCI of the target cell simultaneously when indicating the target sync raster, that is, the SSB indicates the frequency point and the PCI, so that a cell can be uniquely identified. In this scenario, the access assistance information may include, in addition to indication information indicating a next second frequency point to be scanned, indication information indicating a target cell on the second frequency point. And the second frequency point is a scanned historical frequency point.

In this scenario, step 12 may include: detecting whether a target cell on the second frequency point is a scanned historical cell; and if the target cell is not the historical cell, scanning the target cell.

Suppose that the terminal scans the frequency point f1 and finds that the cell with the strongest signal (e.g. the cell with PCI X) at the frequency point f1 cannot be camped or accessed, i.e. is not a viable cell. The terminal continues to scan the frequency point f2, and finds that the cell with the strongest signal on the frequency point f2 cannot be resident or accessed, but the SSB detected on the frequency point f2 indicates that the sync raster (frequency point) to be scanned is f1, and the target cell is a cell with PCI as Y. Since the target cell is not the history cell (cell with PCI being X) scanned on the second frequency point, the terminal directly scans the target cell, that is, the terminal preferentially scans the frequency point f1 according to the SSB indication of the frequency point f 2. The priority scan bin f1 described herein includes scanning bin f1 immediately after searching bin f 2. The terminal judges whether the cell with the PCI of Y on the frequency point f1 is a survivable cell; if so, the terminal selects the cell, and the cell selection/reselection process is finished; otherwise, the terminal continues to scan other frequency points.

In the above, a scenario that the target cell is not the history cell scanned on the second frequency point is described, and in the following embodiment, a scenario that the target cell is the history cell is further described.

Examples III,

And detecting whether the target cell on the second frequency point indicated by the access auxiliary information is a scanned historical cell, and if the target cell is the historical cell, ignoring the target cell.

Suppose that the terminal scans the frequency point f1, and finds that the cell with the strongest signal (for example, the cell with PCI as X) on the frequency point f1 cannot be parked or accessed, that is, is not a viable cell; the terminal continues to scan the frequency point f2, and finds that the cell with the strongest signal on the frequency point f2 cannot be resident or accessed, but the SSB of the cell indicates that the sync scanner (frequency point) to be scanned is f1, and the target cell is a cell with PCI as X. Since the frequency point f1 is a scanned historical frequency point, and the target cell is consistent with the scanned historical cell (cell with PCI of X) on the frequency point f1, in order to avoid the terminal from repeatedly scanning the scanned frequency point and cell, the terminal may ignore the sync raster obtained on the SSB of the frequency point f2 and the cell with PCI of X, and continue to scan other unscanned frequency points.

Alternatively, example four,

Detecting whether a target cell on a second frequency point indicated by the access auxiliary information is a scanned historical cell, and if the target cell is the historical cell, detecting a second time interval between the current time and the last scanning time of the target cell; if the second time interval is greater than a second preset interval threshold, scanning the target cell; and if the second time interval is smaller than the preset interval threshold, ignoring the target cell. When the second time interval is equal to the second preset interval threshold, the target cell may be scanned, or the target cell may be ignored.

Suppose that the terminal scans the frequency point f1, and finds that the cell with the strongest signal (for example, the cell with PCI as X) on the frequency point f1 cannot be parked or accessed, that is, is not a viable cell; the terminal continues to scan the frequency point f2, and finds that the cell with the strongest signal on the frequency point f2 cannot be resident or accessed, but the SSB of the cell indicates that the sync scanner (frequency point) to be scanned is f1, and the target cell is a cell with PCI as X. Although the frequency point f1 is a scanned historical frequency point and the target cell is a scanned historical cell, since the terminal location or the network configuration may have changed, the terminal may further determine whether to scan the target cell according to the last scanning time of the target cell on the second frequency point indicated by the frequency point scanning history information. If the time interval between the current time and the time when the terminal last scans the cell with the PCI of X on the frequency point f1 is smaller than the second preset interval threshold T, the terminal ignores the sync raster obtained on the SSB of the frequency point f2 and the cell with the PCI of X, and continues to scan other unscanned frequency points. And if the time interval between the current moment and the moment when the terminal scans the cell with the PCI of X at the frequency point f1 last time is greater than or equal to a second preset interval threshold T, the terminal scans the cell with the PCI of X at the frequency point f1 according to the SSB indication of the frequency point f 2.

In one embodiment, step 11 may be preceded by: and scanning the first frequency point to obtain a synchronous signal block on the first frequency point. After obtaining the synchronization signal block, the method may further include: determining whether a cell on a first frequency point allows residence or access according to a synchronous signal block; if the cell on the first frequency point does not allow camping or access, step 12 is executed.

Wherein, according to the synchronization signal block, the step of determining whether the cell on the first frequency point allows to camp on or access may further include: the terminal scans all radio frequency channels (carrier frequencies) one by one according to the capability of the terminal so as to find a proper cell for access. At each scanned carrier frequency, the terminal only needs to search the cell with the strongest signal quality, and once a suitable cell is found, the cell is selected to camp on. And the initial cell selection process is stopped, i.e. the unscanned carrier frequencies are not rescanned. Wherein the suitable cell satisfies at least all of the following conditions: the signal quality of the cell meets a preset condition; the terminal can obtain necessary system information (including at least MIB and SIB 1); cell access restriction information element (cellbar IE) in the system information. Signal quality includes, but is not limited to: reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ), and/or the like.

Optionally, determining whether the cell on the first frequency point is allowed to camp on or access according to the synchronization signal block may further include: acquiring cell access restriction cellbar IE in a synchronous signal block; and if the cellbar IE indicates that the cell on the first frequency point is in the access restriction state, determining that the cell on the first frequency point is not allowed to reside or be accessed.

In some cases, in order to prohibit a terminal from accessing or attaching to the cell, the cell may broadcast a cell access restriction (cellbar) indication in the system information, where an information element (cellbar IE) of the cellbar may take the value of barred (access restricted state) or notgarred (non-access restricted state). If the terminal reads the system information and finds that the cellbar IE is set to be barred, the terminal will avoid selecting or reselecting the cell in a future period of time (the time length is a preset value). In addition, the terminal may further determine whether to select or reselect another cell of the frequency point where the cell is located according to an indication of intra freq reselection permission (intra freq reselection) Information in a Master Information Block (MIB), where the intra freq reselection may be set to Allowed or notAllowed. If intraFreqReselection is set to notAllowed, the terminal will avoid selecting or reselecting other cells of the frequency point where the cell is located within a period of time (the time length is a preset value) in the future; otherwise, the terminal is allowed to select or reselect to other cells of the frequency point of the cell. It is worth pointing out that in the current protocol, when the cellbar IE is set to barred, the terminal only needs to consider the intrafreq reselection IE in the system information, and does not need to consider other IEs.

Scene three,

In this scenario, the cell of the first frequency point is in an access restricted state, and the access auxiliary information includes indication information indicating a next second frequency point to be scanned.

The terminal scans the first frequency point to obtain a synchronous signal block on the first frequency point; the terminal further acquires a cellbar IE in the synchronous signal block; and if the information element indicates that the cell on the first frequency point is in a restricted access state (barred), determining that the cell on the first frequency point is not allowed to reside or access. At this moment, the terminal further obtains the access auxiliary information which is carried in the synchronous signal block on the current frequency point and indicates the second frequency point, so that the second frequency point is preferentially scanned.

Suppose that the terminal scans the frequency point f1, and finds that the cellbar IE broadcasted by the cell with the strongest signal (e.g., the cell with PCI of X) on the frequency point f1 is set to barred, i.e., the cell is not a viable cell. The terminal acquires access auxiliary information indicating that the sync raster (frequency point) to be scanned next is f2 from the SSB on f 1; the terminal preferentially scans the frequency point f2 according to the network indication. The preferentially scanning the frequency point f2 includes immediately scanning the frequency point f2 after the frequency point f1 is searched. If the strongest cell on the frequency point f2 is a suitable cell, the cell selection/reselection process is ended; otherwise, the terminal continues to scan other frequency points.

Scene four,

Considering that there may be multiple cells sending information in a target frequency point, the SSB may indicate the PCI of the target cell simultaneously when indicating the target sync raster, that is, the SSB indicates the frequency point and the PCI, so that a cell can be uniquely identified. In this scenario, the access assistance information may include, in addition to indication information indicating a next second frequency point to be scanned, indication information indicating a target cell on the second frequency point.

The terminal scans the first frequency point to obtain a synchronous signal block on the first frequency point; the terminal further acquires an information element (such as a cellbar IE) in the synchronization signal block; and if the information element indicates that the cell on the first frequency point is in a restricted access state (barred), determining that the cell on the first frequency point is not allowed to reside or access. At this moment, the terminal further acquires the access auxiliary information carried in the synchronization signal block on the current frequency point and indicating the target cell on the second frequency point, so that the target cell of the second frequency point is preferentially scanned.

When the target cell is the cell with the strongest signal at the second frequency point, it is assumed that the terminal scans frequency point f1, and finds that the cellbar IE broadcast by the cell with the strongest signal at frequency point f1 (for example, the cell with PCI as X) is set to barred, that is, the cell is not a capable cell. The terminal acquires access auxiliary information indicating that the next sync raster (frequency point) to be scanned is f2 and the target cell is a cell with PCI of Y from the SSB on f 1; the terminal preferentially scans the cell with the PCI of Y at the frequency point f2 according to the network indication. The preferentially scanning the cell with the PCI of Y at the frequency point f2 includes: and immediately scanning the cell with the PCI of Y on the frequency point f2 after searching the frequency point f 1. If the cell with the frequency point PCI of Y is a survivable cell, the cell selection/reselection process is finished; otherwise, the terminal continues to scan other frequency points.

When the target cell is not the cell with the strongest signal on the second frequency point; if the second frequency point is determined to be scanned, the following steps are executed: scanning a target cell on the second frequency point and one of the cells with the strongest signals; if one of the target cell and the cell with the strongest signal is allowed to reside or access, selecting the cell allowed to reside or access for accessing; otherwise, the other of the target cell and the cell with the strongest signal is scanned.

Examples five,

When the target cell is not the cell with the strongest signal at the second frequency point, it is assumed that the terminal scans frequency point f1, and finds that the cellbar IE broadcast by the cell with the strongest signal at frequency point f1 (for example, the cell with PCI being X) is set to barred, that is, the cell is not a capable cell. The terminal acquires access auxiliary information indicating that the next sync raster (frequency point) to be scanned is f2 and the target cell is a cell with PCI of Y from the SSB on f 1; the terminal preferentially scans the frequency point f2 according to the network indication, and determines whether the cell with the PCI of Y is a viable cell. If the cell with the PCI of Y on the frequency point f2 is a viable cell, the terminal selects the cell, and the cell selection/reselection process is finished; otherwise, the terminal further determines whether the cell with the strongest signal on the frequency point f2 is a viable cell, if so, the terminal selects the cell with the strongest signal, and the cell selection/reselection process is ended; otherwise, the terminal continues to scan other frequency points.

Examples six,

When the target cell is not the cell with the strongest signal at the second frequency point, it is assumed that the terminal scans frequency point f1, and finds that the cellbar IE broadcast by the cell with the strongest signal at frequency point f1 (for example, the cell with PCI being X) is set to barred, that is, the cell is not a capable cell. The terminal acquires access auxiliary information indicating that the next sync raster (frequency point) to be scanned is f2 and the target cell is a cell with PCI of Y from the SSB on f 1; the terminal preferentially scans the frequency point f2 according to the network indication. If the cell with the strongest signal on the frequency point f2 is a survivable cell, the terminal selects the cell with the strongest signal, and the cell selection/reselection process is ended; otherwise, the terminal further determines whether the cell with the PCI of Y on the frequency point f2 is a viable cell, if so, the terminal selects the cell, and the cell selection/reselection process is ended; otherwise, the terminal continues to scan other frequency points.

The following embodiment further describes the cell selection method according to the embodiment of the present invention with reference to a reselection application scenario.

Scene five,

And the terminal sequentially evaluates whether each frequency point has a proper reselectable target cell from the high-priority frequency point based on the frequency point priority order provided by the network equipment, wherein only the able cell can be used as the reselectable target cell. Wherein different frequency bins may be configured with the same or different frequency bin priorities.

And if the cell on the first frequency point can not be resident or accessed, the terminal acquires the access auxiliary information in the synchronous signal block on the first frequency point and determines the next second frequency point to be scanned. And the terminal scans the frequency points according to the priorities of the second frequency point and other frequency points to be scanned.

Examples seven,

The terminal preferentially scans other frequency points to be scanned with priority higher than the second frequency point; if the cells which are allowed to reside or access exist on other frequency points to be scanned, selecting the cells which are allowed to reside or access for access; otherwise, scanning the second frequency point. Wherein, the other frequency points to be scanned are: and scanning the frequency points which are not scanned and are except for the second frequency point and indicated by the historical information of the frequency point scanning.

Supposing that the terminal scans a frequency point f1 and finds that the reselected alternative cell on the frequency point f1 cannot be resident or accessed, that is, is not a viable cell; but the SSB of the cell indicates that the sync scanner (frequency bin) to be scanned is f 2; if no frequency point with the priority higher than the frequency point f2 exists in other frequency points to be scanned, the terminal preferentially scans the frequency point f 2; if the frequency points with the priority higher than the frequency point f2 exist in other frequency points to be scanned, the terminal preferentially scans the frequency points with the priority higher than the frequency point f2 according to the priority until the terminal finds a proper suitable cell as a reselection target cell; and if no suitable survivable cell exists on other frequency points to be scanned, the terminal continues to scan the frequency point f 2. For the frequency point with the same priority as the frequency point f2, the terminal preferentially scans the frequency point f2, and after determining that the suitable cell does not exist on the frequency point f2, the terminal continues to scan the frequency point according to the frequency point priority.

Examples eight,

And the terminal preferentially scans the second frequency point, and after determining that the second frequency point does not have a cell allowing residence or access, scans other frequency points to be scanned according to the priority.

After the terminal determines to scan the second frequency point, the terminal preferentially scans the second frequency point; and if the second frequency point does not have a cell allowing residence or access, scanning other frequency points to be scanned according to the priority. Wherein, the other frequency points to be scanned are: and scanning the frequency points which are not scanned and are except for the second frequency point and indicated by the historical information of the frequency point scanning.

Supposing that the terminal scans a frequency point f1, and finds that the signal reselection candidate cell on the frequency point f1 cannot be resident or accessed, that is, is not a viable cell; but the SSB of the cell indicates that the sync scanner (frequency bin) to be scanned is f 2; and the terminal preferentially scans the frequency point f2, and if the terminal detects a proper survivable cell on the frequency point f2, the survivable cell is taken as a reselection target cell, and the reselection process is ended. And if the terminal does not detect a proper sustainable cell on the frequency point f2, the terminal continues to scan the frequency points according to the frequency point priority.

In the cell selection method of the embodiment of the invention, the terminal preferentially scans the access auxiliary information to determine the next second frequency point to be scanned, and because the second frequency point indicated by the access auxiliary information is a frequency point recommended by the network equipment and having higher probability of being suitable for accessing the cell, the cell selection efficiency of the terminal can be improved, and the power consumption of the terminal can be reduced. In addition, the terminal also determines whether to scan the second frequency point by combining the frequency point historical information, so that the terminal can be prevented from repeatedly scanning the scanned frequency points and cells, and the time delay and the power consumption in the processes of terminal search, cell selection and reselection can be further reduced.

The above embodiments describe the cell selection method in different scenarios, and the terminal corresponding to the cell selection method will be further described with reference to the accompanying drawings.

As shown in fig. 2, a terminal 200 according to an embodiment of the present invention can obtain access auxiliary information carried in a synchronization signal block on a first frequency point in the foregoing embodiment; and determining whether the details of the method for scanning the second frequency point are the same as the details of the method for scanning the second frequency point according to the access auxiliary information and the frequency point scanning historical information, wherein the access auxiliary information comprises indication information indicating the next second frequency point to be scanned. The terminal 200 specifically includes the following functional modules:

a first obtaining module 210, configured to obtain access auxiliary information carried in a synchronization signal block on a first frequency point; the access auxiliary information comprises indication information for indicating a second frequency point to be scanned next;

the first processing module 220 is configured to determine whether to scan the second frequency point according to the access auxiliary information and the frequency point scanning history information.

The first processing module 220 includes:

and the first processing submodule is used for ignoring the second frequency point indicated by the access auxiliary information if the second frequency point is detected to be the scanned historical frequency point.

The first processing module 220 further includes:

the first detection submodule is used for detecting a first time interval between the current moment and the last scanning moment of the second frequency point if the second frequency point indicated by the access auxiliary information is detected to be a scanned historical frequency point;

the second processing submodule is used for scanning the second frequency point if the first time interval is greater than a first preset interval threshold;

and the third processing submodule is used for ignoring the second frequency point if the first time interval is smaller than the first preset interval threshold.

The access auxiliary information also comprises indication information for indicating a target cell on the second frequency point;

the first processing module 220 further includes:

the second detection submodule is used for detecting whether the target cell on the second frequency point is the scanned historical cell;

and the fourth processing submodule is used for scanning the target cell if the target cell is not the historical cell.

The first processing module 220 further includes:

and the fifth processing submodule is used for ignoring the target cell if the target cell is the historical cell.

The first processing module 220 further includes:

a third detection submodule, configured to detect a second time interval between the current time and a last scanning time of the target cell if the target cell is the history cell;

the sixth processing submodule is used for scanning the target cell if the second time interval is greater than a second preset interval threshold;

and the seventh processing sub-module is configured to ignore the target cell if the second time interval is smaller than the preset interval threshold.

Wherein, the terminal 200 further includes:

and the first scanning module is used for scanning the first frequency point to obtain a synchronous signal block on the first frequency point.

Wherein, the terminal 200 further includes:

the second processing module is used for determining whether the cell on the first frequency point allows residence or access according to the synchronous signal block;

and the third processing module is used for executing the step of determining whether to scan the second frequency point according to the access auxiliary information and the frequency point scanning historical information if the cell on the first frequency point does not allow residence or access.

Wherein, the second processing module includes:

a first obtaining submodule, configured to obtain a cell access restriction information element IE in a synchronization signal block;

and the first determining submodule is used for determining that the cell on the first frequency point is not allowed to reside or be accessed if the cellbar IE indicates that the cell on the first frequency point is in the access limiting state.

The access auxiliary information also comprises indication information for indicating a target cell on the second frequency point, and when the target cell is not the cell with the strongest signal on the second frequency point; the first processing module 220 further includes:

the first scanning submodule is used for scanning one of a target cell and a cell with the strongest signal on the second frequency point;

the first access sub-module is used for selecting the cell which is allowed to reside or access to carry out access if the target cell and one of the cells with the strongest signals are allowed to reside or access;

and the second scanning submodule is used for scanning the other one of the target cell and the cell with the strongest signal if the other one of the target cell and the cell with the strongest signal is not allowed to reside or access.

The first processing module 220 further includes:

the third scanning submodule is used for scanning other frequency points to be scanned, the priority of which is higher than that of the second frequency point; wherein, the other frequency points to be scanned are: scanning the frequency points which are not scanned and are indicated by the historical information and are except for the second frequency point;

the second access sub-module is used for selecting the cell which is allowed to reside or access for access if the cell which is allowed to reside or access exists on other frequency points to be scanned; otherwise, scanning the second frequency point.

Wherein, the terminal 200 further includes:

the second scanning module is used for scanning the second frequency point;

the third scanning module is used for scanning other frequency points to be scanned according to the priority if no cell allowing residence or access exists on the second frequency point; wherein, the other frequency points to be scanned are: and scanning the frequency points which are not scanned and are except for the second frequency point and indicated by the historical information of the frequency point scanning.

It is worth pointing out that, in the terminal according to the embodiment of the present invention, the access auxiliary information is preferentially scanned to determine the next second frequency point to be scanned, and since the second frequency point indicated by the access auxiliary information is a frequency point recommended by the network device and having a higher probability of being suitable for accessing the cell, the efficiency of selecting the cell by the terminal can be improved, and the power consumption of the terminal can be reduced. In addition, the terminal also determines whether to scan the second frequency point by combining the frequency point historical information, so that the terminal can be prevented from repeatedly scanning the scanned frequency points and cells, and the time delay and the power consumption in the processes of terminal search, cell selection and reselection can be further reduced.

In another embodiment of the present invention, there is also provided a cell selection method, as shown in fig. 3, the method may include the following steps:

step 31: and acquiring a cell access restriction information element (cellbar IE) and access auxiliary information in a synchronous signal block on a first frequency point.

In one embodiment, step 11 may be preceded by: and scanning the first frequency point to obtain a synchronous signal block on the first frequency point. Acquiring a cellbar IE in a synchronous signal block; and if the cellbar IE indicates that the cell on the first frequency point is in the access restriction state, determining that the cell on the first frequency point is not allowed to reside or be accessed.

Step 32: and if the cellbar IE indicates that the cell on the first frequency point is in the access limiting state, scanning the second frequency point according to the access auxiliary information.

In some cases, in order to prohibit a terminal from accessing or attaching to the cell, the cell may broadcast a cell access restriction (cellbar) indication in the system information, where an information element (cellbar IE) of the cellbar may take the value of barred (access restricted state) or notgarred (non-access restricted state). If the terminal reads the system information and finds that the cellbar IE is set to be barred, the terminal will avoid selecting or reselecting the cell in a future period of time (the time length is a preset value).

It should be noted that, the scanning for the second frequency point may be to scan a cell with the strongest signal on the second frequency point. The following steps can be also included: and scanning the cells with the signal intensity exceeding the preset threshold value on the second frequency point, or scanning the first N cells with the strongest signal intensity on the second frequency point, wherein N is an integer greater than or equal to 1.

Optionally, considering that there may be multiple cells sending information in one target frequency point, the SSB may indicate the PCI of the target cell simultaneously when indicating the target sync filter, that is, the SSB indicates the frequency point and the PCI, so that one cell can be uniquely identified. In this scenario, the access assistance information may include, in addition to indication information indicating a next second frequency point to be scanned, indication information indicating a target cell on the second frequency point.

The step of scanning the second frequency point according to the access auxiliary information comprises the following steps: and if the target cell is the cell with the strongest signal on the second frequency point, scanning the target cell. Suppose that the terminal scans the frequency point f1, and finds that the cellbar IE broadcasted by the cell with the strongest signal (e.g., the cell with PCI of X) on the frequency point f1 is set to barred, i.e., the cell is not a viable cell. The terminal acquires access auxiliary information indicating that the next sync raster (frequency point) to be scanned is f2 and the target cell is a cell with PCI of Y from the SSB on f 1; the terminal preferentially scans the cell with the PCI of Y at the frequency point f2 according to the network indication. The preferentially scanning the cell with the PCI of Y at the frequency point f2 includes: and immediately scanning the cell with the PCI of Y on the frequency point f2 after searching the frequency point f 1. If the cell with the frequency point PCI of Y is a survivable cell, the cell selection/reselection process is finished; otherwise, the terminal continues to scan other frequency points.

If the target cell is not the cell with the strongest signal on the second frequency point, scanning the target cell on the second frequency point and one of the cells with the strongest signal; if one of the target cell and the cell with the strongest signal is allowed to reside or access, selecting the cell allowed to reside or access for accessing; otherwise, the other of the target cell and the cell with the strongest signal is scanned. When the target cell is not the cell with the strongest signal at the second frequency point, it is assumed that the terminal scans frequency point f1, and finds that the cellbar IE broadcast by the cell with the strongest signal at frequency point f1 (for example, the cell with PCI being X) is set to barred, that is, the cell is not a capable cell. The terminal acquires access auxiliary information indicating that the next sync raster (frequency point) to be scanned is f2 and the target cell is a cell with PCI of Y from the SSB on f 1; the terminal preferentially scans the frequency point f2 according to the network indication, and determines whether the cell with the PCI of Y is a viable cell. If the cell with the PCI of Y on the frequency point f2 is a viable cell, the terminal selects the cell, and the cell selection/reselection process is finished; otherwise, the terminal further determines whether the cell with the strongest signal on the frequency point f2 is a viable cell, if so, the terminal selects the cell with the strongest signal, and the cell selection/reselection process is ended; otherwise, the terminal continues to scan other frequency points. Or, assuming that the terminal scans the frequency point f1, and finds that the cellbar IE broadcasted by the cell with the strongest signal (e.g., the cell with PCI being X) on the frequency point f1 is set to barred, that is, the cell is not a viable cell. The terminal acquires access auxiliary information indicating that the next sync raster (frequency point) to be scanned is f2 and the target cell is a cell with PCI of Y from the SSB on f 1; the terminal preferentially scans the frequency point f2 according to the network indication. If the cell with the strongest signal on the frequency point f2 is a survivable cell, the terminal selects the cell with the strongest signal, and the cell selection/reselection process is ended; otherwise, the terminal further determines whether the cell with the PCI of Y on the frequency point f2 is a viable cell, if so, the terminal selects the cell, and the cell selection/reselection process is ended; otherwise, the terminal continues to scan other frequency points.

In the cell selection method of the embodiment of the invention, the terminal preferentially scans the access auxiliary information to determine the next second frequency point to be scanned, and because the second frequency point indicated by the access auxiliary information is a frequency point recommended by the network equipment and having higher probability of being suitable for accessing the cell, the cell selection efficiency of the terminal can be improved, and the power consumption of the terminal can be reduced.

As shown in fig. 4, the terminal 400 according to the embodiment of the present invention can obtain the cell access restriction information element cellbar IE and the access auxiliary information in the synchronization signal block on the first frequency point in the foregoing embodiment; and if the cellbar IE indicates that the cell on the first frequency point is in the access limiting state, scanning the second frequency point according to the access auxiliary information, and achieving the same effect, wherein the access auxiliary information comprises indication information indicating the next second frequency point to be scanned. The terminal 200 specifically includes the following functional modules:

an obtaining module 410, configured to obtain a cell access restriction information element, namely, cellbar IE, and access assistance information in a synchronization signal block on a first frequency point; the access auxiliary information comprises indication information for indicating a second frequency point to be scanned next;

the scanning module 420 is configured to scan the second frequency point according to the access auxiliary information if the cellbar IE indicates that the cell on the first frequency point is in the access restricted state.

the scanning module 420 includes:

the first scanning unit is used for scanning the target cell if the target cell is the cell with the strongest signal on the second frequency point;

the second scanning unit is used for scanning one of the target cell on the second frequency point and the cell with the strongest signal if the target cell is not the cell with the strongest signal on the second frequency point; if one of the target cell and the cell with the strongest signal is allowed to reside or access, selecting the cell allowed to reside or access for accessing; otherwise, the other of the target cell and the cell with the strongest signal is scanned.

According to the terminal provided by the embodiment of the invention, when the cell of the first frequency point is in the access limiting state, the access auxiliary information is preferentially scanned to determine the next second frequency point to be scanned, and the second frequency point indicated by the access auxiliary information is the frequency point recommended by the network equipment and having higher probability of being suitable for accessing the cell, so that the cell selection efficiency of the terminal can be improved, and the power consumption of the terminal is reduced.

It should be noted that the division of the modules of the network device and the terminal is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware. For example, the determining module may be a processing element separately set up, or may be implemented by being integrated in a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and the function of the determining module is called and executed by a processing element of the apparatus. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.

For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when one of the above modules is implemented in the form of a Processing element scheduler code, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

To better achieve the above object, further, fig. 5 is a schematic diagram of a hardware structure of a terminal implementing various embodiments of the present invention, where the terminal 50 includes, but is not limited to: a radio frequency unit 51, a network module 52, an audio output unit 53, an input unit 54, a sensor 55, a display unit 56, a user input unit 57, an interface unit 58, a memory 59, a processor 510, and a power supply 511. Those skilled in the art will appreciate that the terminal configuration shown in fig. 5 is not intended to be limiting, and that the terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

The radio frequency unit 51 is configured to acquire access auxiliary information carried in a synchronization signal block on a first frequency point; the access auxiliary information comprises indication information for indicating a second frequency point to be scanned next;

a processor 510, configured to determine whether to scan a second frequency point according to the access auxiliary information and the frequency point scanning history information;

the terminal of the embodiment of the invention preferentially scans the access auxiliary information to determine the next second frequency point to be scanned, and because the second frequency point indicated by the access auxiliary information is the frequency point recommended by the network equipment and having higher probability of being suitable for accessing the cell, the efficiency of selecting the cell by the terminal can be improved, and the power consumption of the terminal is reduced. In addition, the terminal also determines whether to scan the second frequency point by combining the frequency point historical information, so that the terminal can be prevented from repeatedly scanning the scanned frequency points and cells, and the time delay and the power consumption in the processes of terminal search, cell selection and reselection can be further reduced.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 51 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 510; in addition, the uplink data is transmitted to the base station. Typically, the radio frequency unit 51 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 51 may also communicate with a network and other devices through a wireless communication system.

The terminal provides wireless broadband internet access to the user via the network module 52, such as assisting the user in sending and receiving e-mails, browsing web pages, and accessing streaming media.

The audio output unit 53 may convert audio data received by the radio frequency unit 51 or the network module 52 or stored in the memory 59 into an audio signal and output as sound. Also, the audio output unit 53 may also provide audio output related to a specific function performed by the terminal 50 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 53 includes a speaker, a buzzer, a receiver, and the like.

The input unit 54 is used to receive audio or video signals. The input Unit 54 may include a Graphics Processing Unit (GPU) 541 and a microphone 542, and the Graphics processor 541 processes image data of a still picture or video obtained by an image capturing device (such as a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 56. The image frames processed by the graphic processor 541 may be stored in the memory 59 (or other storage medium) or transmitted via the radio frequency unit 51 or the network module 52. The microphone 542 may receive sound, and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 51 in case of the phone call mode.

The terminal 50 also includes at least one sensor 55, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 561 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 561 and/or the backlight when the terminal 50 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 55 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which will not be described in detail herein.

The display unit 56 is used to display information input by the user or information provided to the user. The Display unit 56 may include a Display panel 561, and the Display panel 561 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 57 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 57 includes a touch panel 571 and other input devices 572. The touch panel 571, also referred to as a touch screen, can collect touch operations by a user (e.g., operations by a user on the touch panel 571 or near the touch panel 571 using a finger, a stylus, or any suitable object or attachment). The touch panel 571 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 510, and receives and executes commands sent by the processor 510. In addition, the touch panel 571 can be implemented by various types, such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 57 may include other input devices 572 in addition to the touch panel 571. In particular, the other input devices 572 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described herein.

Further, the touch panel 571 can be overlaid on the display panel 561, and when the touch panel 571 detects a touch operation on or near the touch panel 571, the touch panel is transmitted to the processor 510 to determine the type of the touch event, and then the processor 510 provides a corresponding visual output on the display panel 561 according to the type of the touch event. Although the touch panel 571 and the display panel 561 are shown in fig. 5 as two independent components to implement the input and output functions of the terminal, in some embodiments, the touch panel 571 and the display panel 561 may be integrated to implement the input and output functions of the terminal, and the implementation is not limited herein.

The interface unit 58 is an interface for connecting an external device to the terminal 50. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 58 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal 50 or may be used to transmit data between the terminal 50 and an external device.

The memory 59 may be used to store software programs as well as various data. The memory 59 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 59 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 510 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 59 and calling data stored in the memory 59, thereby performing overall monitoring of the terminal. Processor 510 may include one or more processing units; preferably, the processor 510 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 510.

The terminal 50 may further include a power supply 511 (e.g., a battery) for supplying power to various components, and preferably, the power supply 511 may be logically connected to the processor 510 via a power management system, so that functions of managing charging, discharging, and power consumption are performed via the power management system.

In addition, the terminal 50 includes some functional modules that are not shown, and will not be described in detail herein.

Preferably, an embodiment of the present invention further provides a terminal, which includes a processor 510, a memory 59, and a computer program stored in the memory 59 and capable of running on the processor 510, where the computer program, when executed by the processor 510, implements each process of the above-mentioned cell selection method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again. A terminal may be a wireless terminal or a wired terminal, and a wireless terminal may be a device providing voice and/or other service data connectivity to a user, a handheld device having a wireless connection function, or other processing devices connected to a wireless modem. A wireless terminal, which may be a mobile terminal such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal, e.g., a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, may communicate with one or more core networks via a Radio Access Network (RAN), and may exchange language and/or data with the RAN. For example, devices such as Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs) are used. A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), and a User Device or User Equipment (User Equipment), which are not limited herein.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the cell selection method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.

Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. A method for cell selection, comprising:

acquiring access auxiliary information carried in a synchronous signal block on a first frequency point; the access auxiliary information comprises indication information indicating a second frequency point to be scanned next;

determining whether to scan the second frequency point according to the access auxiliary information and the frequency point scanning historical information;

determining whether to scan the second frequency point according to the access auxiliary information and the frequency point scanning historical information, wherein the step comprises the following steps:

if the second frequency point indicated by the access auxiliary information is detected to be the scanned historical frequency point, ignoring the second frequency point; or

If the second frequency point indicated by the access auxiliary information is detected to be a scanned historical frequency point, detecting a first time interval between the current time and the last scanning time of the second frequency point;

if the first time interval is larger than a first preset interval threshold, scanning the second frequency point;

if the first time interval is smaller than the first preset interval threshold, ignoring the second frequency point; or

Scanning other frequency points to be scanned with priority higher than the second frequency point; wherein, the other frequency points to be scanned are: scanning the frequency points which are not scanned and are indicated by the historical information and are except for the second frequency point;

if the cells which are allowed to reside or access exist on other frequency points to be scanned, selecting the cells which are allowed to reside or access for access;

otherwise, scanning the second frequency point; or

Determining to scan the second frequency point;

if the cell allowing residence or access does not exist on the second frequency point, scanning other frequency points to be scanned according to the priority; wherein, the other frequency points to be scanned are: and scanning the frequency points which are not scanned and are indicated by the historical information of the frequency points and are except for the second frequency point.

2. The cell selection method of claim 1, wherein the step of scanning the second frequency point comprises:

and scanning the cell with the strongest signal on the second frequency point.

3. The cell selection method according to claim 1, wherein the access assistance information further includes indication information indicating a target cell on a second frequency point;

determining the step of scanning the second frequency point according to the access auxiliary information and the frequency point scanning historical information, wherein the step comprises the following steps:

detecting whether a target cell on the second frequency point is a scanned historical cell;

and if the target cell is not the historical cell, scanning the target cell.

4. The cell selection method according to claim 3, wherein after the step of detecting whether the target cell on the second frequency point is the scanned history cell, the method further comprises:

and if the target cell is the historical cell, ignoring the target cell.

5. The cell selection method according to claim 3, wherein after the step of detecting whether the target cell on the second frequency point is the scanned history cell, the method further comprises:

if the target cell is a historical cell, detecting a second time interval between the current time and the last scanning time of the target cell;

if the second time interval is greater than a second preset interval threshold, scanning the target cell;

and if the second time interval is smaller than the preset interval threshold, ignoring the target cell.

6. The cell selection method according to claim 1, wherein before the step of obtaining the access assistance information carried in the synchronization signal block on the first frequency point, the method further comprises:

and scanning the first frequency point to obtain a synchronous signal block on the first frequency point.

7. The cell selection method of claim 6, wherein after the step of scanning the first frequency point to obtain the synchronization signal block on the first frequency point, the method further comprises:

determining whether a cell on a first frequency point allows residence or access according to the synchronous signal block;

and if the cell on the first frequency point does not allow residence or access, determining whether to scan the second frequency point according to the access auxiliary information and the frequency point scanning history information.

8. The method of claim 7, wherein the step of determining whether the cell on the first frequency point is allowed to camp on or access according to the synchronization signal block comprises:

acquiring a cell access restriction information element cellbaiie in the synchronization signal block;

and if the cellbar IE indicates that the cell on the first frequency point is in the access restriction state, determining that the cell on the first frequency point is not allowed to reside or be accessed.

9. The cell selection method according to claim 8, wherein the access assistance information further includes indication information indicating a target cell on a second frequency point, when the target cell is not the cell with the strongest signal on the second frequency point; if the second frequency point is determined to be scanned, executing the following steps:

scanning one of the target cell and the cell with the strongest signal on the second frequency point;

if one of the target cell and the cell with the strongest signal is allowed to reside or access, selecting the cell allowed to reside or access for accessing;

otherwise, scanning the other of the target cell and the cell with the strongest signal.

10. A terminal, comprising:

the first acquisition module is used for acquiring access auxiliary information carried in a synchronous signal block on a first frequency point; the access auxiliary information comprises indication information indicating a second frequency point to be scanned next;

the first processing module is used for determining whether to scan the second frequency point according to the access auxiliary information and the frequency point scanning historical information;

the first processing module comprises:

a first processing sub-module, configured to ignore a second frequency point indicated by the access assistance information if the second frequency point is detected to be a scanned historical frequency point; or

a third processing sub-module, configured to ignore the second frequency point if the first time interval is smaller than the first preset interval threshold; or

the second access sub-module is used for selecting the cell which is allowed to reside or access for access if the cell which is allowed to reside or access exists on other frequency points to be scanned; otherwise, scanning the second frequency point; or

The second scanning module is used for determining to scan the second frequency point;

a third scanning module, configured to scan other frequency points to be scanned according to priority if no cell allowing residence or access exists on the second frequency point; wherein, the other frequency points to be scanned are: and scanning the frequency points which are not scanned and are indicated by the historical information of the frequency points and are except for the second frequency point.

11. The terminal of claim 10, wherein the access assistance information further includes indication information indicating a target cell on a second frequency point;

the first processing module further comprises:

the second detection submodule is used for detecting whether the target cell on the second frequency point is a scanned historical cell;

12. The terminal of claim 11, wherein the first processing module further comprises:

and a fifth processing submodule, configured to ignore the target cell if the target cell is a history cell.

13. The terminal of claim 11, wherein the first processing module further comprises:

a third detection submodule, configured to detect a second time interval between the current time and a last scanning time of the target cell if the target cell is a history cell;

a sixth processing sub-module, configured to scan the target cell if the second time interval is greater than a second preset interval threshold;

a seventh processing sub-module, configured to ignore the target cell if the second time interval is smaller than the preset interval threshold.

14. The terminal of claim 10, further comprising:

15. The terminal of claim 14, wherein the terminal further comprises:

16. The terminal of claim 15, wherein the second processing module comprises:

a first obtaining submodule, configured to obtain a cell access restriction information element cellbaiie in the synchronization signal block;

17. The terminal of claim 16, wherein the access assistance information further includes indication information indicating a target cell on a second frequency point, when the target cell is not a cell with the strongest signal on the second frequency point; the first processing module further comprises:

the first access sub-module is used for selecting a cell which is allowed to reside or access for access if the target cell and one of the cells with the strongest signals are allowed to reside or access;

and a second scanning sub-module, configured to scan, if one of the target cell and the cell with the strongest signal does not allow camping or accessing, the other of the target cell and the cell with the strongest signal.

18. A method for cell selection, comprising:

acquiring a cell access restriction information element (cellbar IE) and access auxiliary information in a synchronous signal block on a first frequency point; the access auxiliary information comprises indication information indicating a second frequency point to be scanned next;

19. The cell selection method according to claim 18, wherein the access assistance information further includes indication information indicating a target cell on a second frequency point;

the step of scanning the second frequency point according to the access auxiliary information comprises the following steps:

if the target cell is the cell with the strongest signal on the second frequency point, scanning the target cell;

if the target cell is not the cell with the strongest signal on the second frequency point, scanning the target cell on the second frequency point and one of the cells with the strongest signal; if one of the target cell and the cell with the strongest signal is allowed to reside or access, selecting the cell allowed to reside or access for accessing; otherwise, scanning the other of the target cell and the cell with the strongest signal.

20. A terminal, comprising:

the acquisition module is used for acquiring cell access restriction information element (cellbar IE) and access auxiliary information in a synchronous signal block on a first frequency point; the access auxiliary information comprises indication information indicating a second frequency point to be scanned next;

21. The terminal of claim 20, wherein the access assistance information further includes indication information indicating a target cell on a second frequency point;

the scanning module includes:

a second scanning unit, configured to scan one of the target cell on the second frequency point and the cell with the strongest signal if the target cell is not the cell with the strongest signal on the second frequency point; if one of the target cell and the cell with the strongest signal is allowed to reside or access, selecting the cell allowed to reside or access for accessing; otherwise, scanning the other of the target cell and the cell with the strongest signal.

22. A terminal, characterized in that the terminal comprises a processor, a memory and a computer program stored on the memory and being executable on the processor, the computer program, when executed by the processor, implementing the steps of the cell selection method according to any of claims 1 to 9, 18 to 19.

23. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for cell selection according to any one of claims 1 to 9 and 18 to 19.