WO2020088325A1

WO2020088325A1 - Cell reselection method and device

Info

Publication number: WO2020088325A1
Application number: PCT/CN2019/112750
Authority: WO
Inventors: 闫润; 马丁布莱恩•亚历山大; 常俊仁
Original assignee: 华为技术有限公司
Priority date: 2018-11-02
Filing date: 2019-10-23
Publication date: 2020-05-07
Also published as: CN111148173A; CN111148173B

Abstract

A cell reselection method and device. The method comprises: in the cell reselection process, determining that a second cell is barred from access; determining the highest order cell according to a cell reselection criterion; when the highest order cell changes, and a first condition is satisfied, releasing the restriction of access barred of at least one cell, the at least one cell being a cell that is barred from access in the cell reselection, and the at least one cell comprising the second cell and/or co-frequency cells of the second cell. By means of the first condition, the terminal device can reduce the number of checks on a cell when the cell is barred from access to the greatest extent, so that the invalid power consumption of the terminal device is reduced, and the check validity of the terminal device to the cell is higher.

Description

Method and equipment for cell reselection

Cross-reference of related applications

This application requires the priority of the Chinese patent application filed on November 02, 2018 in the China Patent Office, with the application number 201811302744.3 and the application name "a cell reselection method and equipment", the entire contents of which are incorporated by reference in this application in.

Technical field

This application relates to the field of communication technology, and in particular, to a cell reselection method and device.

Background technique

At present, when performing cell reselection, the terminal device sorts the cells that satisfy the S criterion in the candidate list of cell reselection according to the R criterion. Among them, the cells that satisfy the S criterion can be simply understood as cells whose signal quality meets certain requirements , Sorted according to the R criterion, for example, in order of the signal quality of the cell from high to low. For the highest-ranking cell, that is, the highest-ranking cell, when the duration of the terminal device camping in the current serving cell is greater than 1s, and the duration of the highest-ranking cell that is not the serving cell of the terminal device is greater than the preset threshold TreselectionRAT, the terminal The system information of the highest ranked cell is read to perform access bar check on the highest ranked cell. If the check result is "not barred", indicating that the highest ranked cell is allowed to be accessed by the terminal device, the terminal device may reselect to the highest ranked cell and continue to perform The cell reselection process described earlier. If the check result is "barred", it indicates that the highest ranked cell is forbidden to access to the terminal device, and the terminal device does not include the highest ranked cell in the candidate list of cell reselection, or the secondary cell The highest sorted cell is excluded from the selected candidate list, and the duration of the exclusion is about 300s. The terminal device then sorts the remaining cells in the candidate list of cell reselection, and then performs a bar check on the newly sorted highest sorted cell. Until the terminal equipment reselects into a certain cell.

After the terminal device reselects to access a cell, the terminal device will continue the cell reselection process. Then, in the cell reselection process here, if the highest sorted cell sorted by the terminal device according to the R criterion is not the cell where the terminal device currently resides, the terminal device will reselect the cell before reselecting the cell. The cells whose access is forbidden are included in the candidate list of the cell reselection of the terminal device again, so that these cells participate in the cell reselection process again.

In general, the system information update period is 64 to 4096 radio frames (40.96s maximum), and even if the system information is updated, the information that determines whether a cell is barred from accessing does not necessarily change, that is, before Cells that are barred from access may continue to be barred from access. The length of time to complete a cell reselection is on the order of seconds, and the field test found that the highest ranked cell changes very frequently. Then, the cell that was originally forbidden to access, after being re-incorporated into the cell reselection candidate list of the terminal device, may still be barred from accessing during the process of re-participating in cell reselection, but the terminal device still The verification of these cells results in a large power consumption of the terminal equipment.

Summary of the invention

Embodiments of the present application provide a cell reselection method and device, which are used to reduce power consumption of a terminal device.

In a first aspect, a cell reselection method is provided. The method includes: during cell reselection, determining that a second cell is forbidden to access; determining the highest ranked cell according to a cell reselection criterion; when the highest ranked cell occurs When the first condition is changed and the access barring restriction on at least one cell is removed, the at least one cell is a cell barred from access during the cell reselection process, and the at least one cell includes all The second cell and / or the same-frequency cell of the second cell.

The method may be executed by a first communication device, for example, a terminal device or a communication device capable of supporting the functions required by the method by the terminal device, or, for example, a chip that can be provided in the terminal device.

In the embodiment of the present application, when the terminal device performs cell reselection again in the first cell, if the highest ranked cell changes and the first condition is met, the second cell that was previously forbidden to access will be used as the candidate cell again. If the first condition is not satisfied, the second cell that was previously prohibited from accessing will not be used as a candidate cell. In practical applications, the state where a cell is forbidden to access may continue for a long time. Then, through the first condition, when a cell is forbidden to access, the terminal device can reduce the calibration of the cell. The number of verifications reduces the invalid power consumption of the terminal device, and also makes the terminal device more effective for cell verification.

With reference to the first aspect, in a possible implementation manner of the first aspect, determining the highest ranked cell according to the cell reselection criterion includes: after accessing the first cell through cell reselection, determining the cell according to the cell reselection criterion The highest ranked cell; or, when no suitable cell is found during the cell reselection, determine the highest ranked cell according to the cell reselection criteria.

The terminal device reorders the candidate cells, which may occur after the terminal device reselects to access a new cell, or it may also occur when the terminal device does not find a suitable cell during the cell reselection process. The situation can be understood as that the terminal device does not select a suitable cell during the cell reselection process, then the terminal device may not camp on any cell, but enters the state of "select any cell (any cell selection)", or , The terminal device may also enter the "camp in any cell (camp on any cell)" state. When the terminal device does not select a suitable cell in the cell reselection process, the terminal device may also sort the candidate cells according to the cell reselection criteria to determine the highest ranked cell. For the scenario in which the terminal devices are specifically sorted, the embodiments of the present application do not limit it.

With reference to the first aspect, in a possible implementation manner of the first aspect, the highest ranked cell is the first cell or the second cell or other than the first cell and the second cell Other communities.

Since the terminal device accesses the first cell, it indicates that the first cell is the highest ranked cell when accessing the first cell, so the highest ranked cell may be the first cell. After the terminal device accesses the first cell, if it passes the cell The highest ranking cell determined by the reselection criterion is not the first cell, and it can be determined that the highest ranking cell has changed. Or, the highest-ranked cell here may also be a cell whose terminal device is forbidden to access during the cell reselection process before accessing the first cell, for example, during a cell reselection process before the terminal device accesses the first cell, The first cell to be denied access. Before the terminal device accesses the first cell, there may be a cell that is bard, for example, the second cell is the first cell that is prohibited from accessing, then the highest ranked cell here may be the second cell. Alternatively, the highest ranked cell may also be other cells than the first cell and the second cell, which is not specifically limited.

With reference to the first aspect, in a possible implementation manner of the first aspect, the access of the second cell is prohibited, which means that the second cell is excluded from the candidate list for cell reselection.

With reference to the first aspect, in a possible implementation manner of the first aspect, the second cell is specifically N cells, and when the highest ranked cell changes and the first condition is met, the at least one cell is released. The access barring restriction of includes: when the highest ranked cell changes and the first condition is met, releasing the barring access restriction on the N cells, where the N cells In the selection process, all cells that are prohibited from accessing.

For example, the second cell may be a cell, or may specifically be N cells, that is, the second cell is a general term for N cells, and N is a positive integer. If the second cell is specifically N cells, it may be considered that these N cells are all cells that are prohibited in the cell reselection process before the terminal device reselects to access the first cell. In this case, each cell included in the second cell can be processed according to the solution provided in the embodiment of the present application, that is, when the second cell is regarded as a cell, the The processing method of the second cell may be used for processing each of the N cells. Then, when the highest ranked cell changes and the first condition is met, the terminal device lifts the access prohibition restriction on at least one cell, which can be considered to be the removal of the cell before the terminal device reselects access to the first cell Forbidden access restriction for all prohibited cells in the reselection process.

With reference to the first aspect, in a possible implementation manner of the first aspect, the second cell is a cell, and when the highest ranked cell changes and the first condition is met, the prohibition on at least one cell is released Access restriction includes: when the highest-ranking cell changes and the first condition is met, releasing the access prohibition restriction on all cells whose access is prohibited during the cell reselection process.

In the case where the second cell is a cell, by checking one cell, it is possible to remove the access prohibition restriction on all cells whose access is prohibited during the cell reselection process. The method is relatively simple. There is no restriction on the first condition here, and the first condition described later can be applied to this technical solution.

With reference to the first aspect, in a possible implementation manner of the first aspect, the first condition is that the timer times out.

With reference to the first aspect, in a possible implementation manner of the first aspect, during the cell reselection process, the second cell is prohibited from accessing, including: during the cell reselection process, the The second cell performs an access restriction check, and the access restriction check is used to check whether the terminal device can access the second cell; the result of determining the access restriction check is that the second cell is prohibited Access, start the timer, wherein the second cell is the first cell to be denied access during the cell reselection process, or the second cell is the cell reselected in the cell Any cell that is forbidden to access during the process.

A timer may be set for each cell that is forbidden to access before the terminal device reselects to a new cell, so that the timer is more targeted. Or, a unified timer may be set for all cells whose access is forbidden before the terminal device reselects to a new cell. For example, after the terminal device starts cell reselection at a certain time, it may be barred for the first time. "The cell is set with a timer. For example, the second cell is the first cell that the terminal device is prohibited from accessing during the cell reselection process before reselecting to the first cell, which helps reduce the number of timers. Simplify the implementation process.

For example, the second cell specifically includes N cells. If the second cell is any cell whose access is forbidden during the cell reselection, this implementation may be for each of the N cells , It can be understood that during the process of cell reselection, the fifth cell of the N cells is prohibited from access, including: during the process of cell reselection, the first cell of the N cells Five cells perform an access restriction check, and the access restriction check is used to check whether a terminal device can access the fifth cell; the result of determining the access restriction check is that the fifth cell is prohibited Access, start the timer, wherein the fifth cell is any cell whose access is forbidden during the cell reselection. The "fifth cell" described here can be understood as, for example, one cell among N cells, but the same processing can be performed on each of the N cells. For example, the fifth cell above may be replaced with the i-th cell, i takes an integer from 1 to N, that is, the same processing is performed on each of the N cells, that is, the second cell deal with.

With reference to the first aspect, in a possible implementation manner of the first aspect, determining that the result of the access restriction check is that the second cell is prohibited from accessing, and starting the timer includes: determining the The result of the access restriction check is that the second cell is prohibited from accessing, and a first timer is started; or, the result of the access restriction check is that the second cell and the second cell are the same The frequency cell is prohibited from accessing and the second timer is started.

Two timers can be set for a cell, namely a first timer and a second timer. For example, if the result of the bar check is that the second cell is "barred", and the parameter intraFreqReselection in the MIB read by the terminal device is "allowed", that is, the terminal device determines that the terminal device cannot access the second cell, or It is described that the terminal device determines that co-frequency reselection is allowed. Alternatively, the terminal device may start the first timer, or the terminal device may not start the timer. If the result of the bar check is that the second cell is "barred" and the parameter intraFreqReselection in the MIB read by the terminal device is "not allowed", that is, the terminal device determines that the terminal device cannot access the second cell and the second cell Of the same frequency cell, or this description is that the terminal device determines that the same frequency reselection is not allowed, then optionally, the terminal device may start the second timer, or the terminal device may not start the timer. By setting two timers, the timer makes the indication of the verification result of the cell more clear.

For example, the second cell specifically includes N cells. If the second cell is any cell whose access is forbidden during the cell reselection, this implementation may be for each of the N cells It can be understood that the result of determining the access restriction check is that the fifth cell of the N cells is prohibited from accessing, and starting the timer includes: determining the access restriction check The result is that the fifth cell in the N cells is forbidden to access, and the first timer is started; or, the result of determining the access restriction check is the fifth cell in the N cells and the Access to the same-frequency cell of the fifth cell is prohibited, and the second timer is started. The "fifth cell" described here can be understood as, for example, one cell among N cells, but the same processing can be performed on each of the N cells. For example, the fifth cell above may be replaced with the i-th cell, i takes an integer from 1 to N, that is, the same processing is performed on each of the N cells, that is, the second cell deal with.

With reference to the first aspect, in a possible implementation manner of the first aspect, if the second cell is the first cell forbidden to access during the cell reselection process, when the highest When the sorted cell changes and the timer times out, releasing the access barring restriction on at least one cell includes: when the highest sorted cell changes and the first timer or the second timer times out, Remove the access barring restriction on all cells forbidden to access during the cell reselection process.

If two timers are set for a cell, and a unified timer is set for all cells whose access is forbidden before the terminal device is reselected to a new cell, then when the highest ranked cell changes and the first timing When the timer or the second timer expires, the access barring restrictions on all cells that are barred from access during cell reselection are lifted, and a single timer can be used to block all access barred during cell reselecting. The monitoring of the incoming cell is relatively simple.

With reference to the first aspect, in a possible implementation manner of the first aspect, the second cell is any cell whose access is prohibited during the cell reselection process, when the highest ranked cell When the change occurs and the timer expires, releasing the access prohibition restriction on at least one cell includes: when the highest ranked cell changes and the first timer expires, releasing the prohibition on the second cell Access restriction; or, when the highest-ranked cell changes and the timer expires, lifting the access prohibition restriction on at least one cell includes: when the highest-ranked cell changes, and the second timer When it times out, release the access prohibition restriction on the second cell and the same-frequency cell of the second cell, or release the access prohibition restriction on the same-frequency cell of the second cell.

If two timers are set for a cell, and a timer is set for each cell whose access is forbidden before the terminal device reselects to a new cell, then when the access prohibition on the cell is lifted , May be to remove the access prohibition of the cell corresponding to the corresponding timer, which also makes the timer setting more targeted.

For example, the second cell specifically includes N cells. If the second cell is any cell whose access is forbidden during the cell reselection, this implementation may be for each of the N cells , It can be understood that when the highest-ranking cell changes and the timer expires, lifting the barred access restriction on at least one cell includes: when the highest-ranking cell changes, and the first When the timer expires, remove the access prohibition restriction on the fifth cell of the N cells; or, when the highest ranked cell changes and the timer expires, remove the access prohibition restriction on at least one cell Including: when the highest-ranking cell changes and the second timer expires, releasing the access prohibition restriction on the fifth cell of the N cells and the same-frequency cell of the fifth cell, Or lift the access prohibition restriction on the same-frequency cell of the fifth cell among the N cells. The "fifth cell" described here can be understood as, for example, one cell among N cells, and each cell among the N cells can be subjected to the same processing. For example, the fifth cell above may be replaced with the i-th cell, i takes an integer from 1 to N, that is, the same processing is performed on each of the N cells, that is, the second cell deal with.

With reference to the first aspect, in a possible implementation manner of the first aspect, the method further includes: receiving first information from a network device, where the first information is used to indicate the duration of the timer.

The duration of the timer is, for example, notified by the network device to the terminal device through signaling, or may be pre-defined through a protocol, or may be obtained by the terminal device through other means, without specific limitation.

With reference to the first aspect, in a possible implementation manner of the first aspect, the first condition is that during the cell reselection process, the result of performing an access restriction check on the second cell is the The second cell and the co-frequency cell of the second cell are barred from access.

When co-frequency reselection is not allowed, for example, access to the second cell and the same-frequency cell of the second cell is prohibited, that is, access to the second cell is prohibited while access to the second cell is prohibited All other cells at the frequency point, that is, all other cells at the frequency point where the second cell is located are involved. At this time, regardless of whether the current system information of other cells of the same frequency indicates that other cells are prohibited from accessing the terminal device, The terminal device cannot consider these cells during cell reselection, so that the selectable range of the terminal device when performing cell reselection is greatly reduced. In this regard, the embodiments of the present application can remove the prohibited access restriction on the involved cells as soon as possible, and try to avoid the terminal device from significantly reducing the number of candidate cells when performing cell reselection, thereby facilitating the terminal device to reselect to the signal strength as much as possible Good neighborhood. In addition, in this embodiment of the present application, when co-frequency reselection is not allowed, it may also choose not to remove the barred access restriction on the original highest-ranked cell (for example, only to remove the barred access restriction on the co-frequency cell of the second cell) , Without lifting the access prohibition restriction on the second cell), to avoid unnecessary power consumption caused by the terminal device re-considering the original highest-ranking cell in subsequent cell reselection.

For example, the second cell specifically includes N cells. If the second cell is any cell whose access is forbidden during the cell reselection, this implementation may be for each of the N cells Yes, it can be understood that the first condition is that during the cell reselection process, the result of performing an access restriction check on the fifth cell of the N cells is that of the N cells The fifth cell and the co-frequency cell of the fifth cell are barred from access. The "fifth cell" described here can be understood as, for example, one cell among N cells, and each cell among the N cells can be subjected to the same processing. For example, the fifth cell above may be replaced with the i-th cell, i takes an integer from 1 to N, that is, the same processing is performed on each of the N cells, that is, the second cell deal with.

With reference to the first aspect, in a possible implementation manner of the first aspect, the first condition is that a timer expires, and the number of reselection failures of the second cell is less than or equal to a threshold; the at least one The cell includes the second cell, or a co-frequency cell including the second cell and the second cell, and the number of reselection failures of the second cell is the terminal device within the timing duration of the timer The number of times that access is continuously prohibited by the second cell, or the number of reselection failures of the second cell is the number of times the terminal device is prohibited from being accessed by the second cell within the timing duration of the timer.

The number of reselection failures corresponding to the second cell records the number of times that the terminal device was continuously barred from access by the second cell within the timer duration (if there is no continuity in the middle, the number of reselection failures will be cleared) , Or the number of times the terminal device is prohibited from being accessed by the second cell within the timing duration of the timer. Then, when the timer expires, if the number of reselection failures of the second cell is greater than the threshold, the access prohibition restriction on the second cell is not lifted, that is, the second cell is excluded from the candidate cells of the terminal device, The second cell is not a candidate cell of the terminal device. It can be understood that if a cell is continuously bard or is barged for a period of time greater than the threshold value under the existing bar release mechanism, it indicates that the existing bar release mechanism may not be applicable to the cell, the terminal The device performs access restriction verification on such a cell, which causes unnecessary power consumption of the terminal device. Therefore, in the embodiments of the present application, the bar limit of the cell is no longer lifted according to the existing mechanism, but whether the access barring restriction of the cell is lifted is determined by setting the number of reselection failures, if the reselection of a cell fails If the number is too many, the access prohibition restriction of the cell is not lifted, thereby reducing unnecessary power consumption of the terminal device.

For example, the second cell specifically includes N cells. If the second cell is any cell whose access is forbidden during the cell reselection, this implementation may be for each of the N cells , It can be understood that the first condition is that the timer expires, and the number of reselection failures of the fifth cell among the N cells is less than or equal to a threshold; the at least one cell includes the first A fifth cell, or a co-frequency cell including the fifth cell and the fifth cell, the number of reselection failures of the fifth cell is that the terminal device is used by the fifth within the timing duration of the timer The number of times the cell continuously prohibits access, or the number of reselection failures of the fifth cell is the number of times the terminal device is prohibited from access by the fifth cell within the timing duration of the timer. The "fifth cell" described here can be understood as, for example, one cell among N cells, but the same processing can be performed on each of the N cells. For example, the fifth cell above may be replaced with the i-th cell, i takes an integer from 1 to N, that is, the same processing is performed on each of the N cells, that is, the second cell deal with.

With reference to the first aspect, in a possible implementation manner of the first aspect, during the cell reselection process, determining that the second cell is prohibited from accessing includes: during the cell reselection process, The second cell performs an access restriction check, and the access restriction check is used to check whether the terminal device can access the second cell; the number of reselection failures of the second cell is that the terminal device is in The number of times access by the second cell is continuously prohibited within the timing duration of the timer, then, when the result of the access restriction check is that the second cell is forbidden to access, and the second cell When the result of the access restriction check is that the second cell is prohibited from accessing, the number of reselection failures is increased by 1, or when the result of the access restriction check is that the second cell is Access is prohibited, and when the result of the last access restriction check of the second cell is that the second cell is not prohibited from access, the number of reselection failures is reset to zero, and the timing is started or restarted Or; the number of reselection failures of the second cell is the final The number of times the end device is prohibited from being accessed by the second cell within the timing duration of the timer, then, when the result of the access restriction check is that the second cell is prohibited from accessing, and the timing When the device has not timed out, increase the number of failed reselections by 1, or, when the result of the access restriction check is that the second cell is prohibited from accessing, start the timer, and select the reselection Increase the number of failures by 1.

If the number of reselection failures corresponding to the second cell records the number of times the terminal device is continuously prohibited from being accessed by the second cell within the timer duration, or the terminal device is prohibited from being accessed by the second cell within the timer duration of the timer Enter the number of times, then here is how to record the number of failed reselection and how to set the timer.

For example, the second cell specifically includes N cells. If the second cell is any cell whose access is forbidden during the cell reselection, this implementation may be for each of the N cells It can be understood that, during the process of cell reselection, determining that the fifth cell of N cells is forbidden to access includes: in the process of cell reselection, The fifth cell performs an access restriction check, and the access restriction check is used to check whether a terminal device can access the fifth cell; the number of reselection failures of the fifth cell is that the terminal device is in The number of times access by the fifth cell is continuously barred within the timing duration of the timer, then, when the result of the access restriction check is that the fifth cell is barred from access, and the fifth cell When the result of the access restriction verification is that the fifth cell is prohibited from accessing, the number of reselection failures is increased by 1, or when the result of the access restriction verification is that the fifth cell is Access is prohibited, and the fifth cell was last accessed The result of the restriction check is that when the fifth cell is not prohibited from accessing, the number of reselection failures is cleared, and the timer is started or restarted; or, the number of reselection failures of the fifth cell is The number of times the terminal device is prohibited from being accessed by the fifth cell within the timing duration of the timer, then, when the result of the access restriction check is that the fifth cell is prohibited from accessing, and the When the timer has not timed out, increase the number of failed reselections by 1, or, when the result of the access restriction check is that the fifth cell is prohibited from accessing, start the timer and set the timer Increase the number of failed reselections by 1. The "fifth cell" described here can be understood as, for example, one cell among N cells, but the same processing can be performed on each of the N cells. For example, the fifth cell above may be replaced with the i-th cell, i takes an integer from 1 to N, that is, the same processing is performed on each of the N cells, that is, the second cell deal with.

With reference to the first aspect, in a possible implementation manner of the first aspect, the first condition is that the number of reselection failures of the second cell is less than or equal to a threshold, and the at least one cell includes the first A second cell, or a co-frequency cell including the second cell and the second cell, and the number of reselection failures of the second cell is the number of times the terminal device is continuously prohibited from being accessed by the second cell.

The number of reselection failures corresponding to the second cell records the number of times the terminal device is continuously prohibited from being accessed by the second cell (if there is no continuity in the middle, the number of reselection failures will be cleared). Then, if the number of reselection failures of the second cell is greater than the threshold, the terminal device does not remove the access barring restriction on the second cell, that is, the second cell is excluded from the candidate cell of the terminal device, and the second cell does not As a candidate cell for terminal equipment. It can be understood that if a cell is continuously bard more than the threshold value under the existing bar release mechanism, it indicates that the existing bar release mechanism may not be applicable to the cell, and the terminal device connects to such a cell Input limit verification will cause unnecessary power consumption of the terminal device. Therefore, in the embodiments of the present application, the bar restriction of the cell is no longer removed according to the existing mechanism, but whether the access barring restriction of the cell is lifted is determined by setting the number of reselection failures. If the number is too many, the access prohibition restriction of the cell is not lifted, thereby reducing unnecessary power consumption of the terminal device.

For example, the second cell specifically includes N cells. If the second cell is any cell whose access is forbidden during the cell reselection, this implementation may be for each of the N cells , It can be understood that the first condition is that the number of reselection failures of the fifth cell among the N cells is less than or equal to a threshold, and the at least one cell includes the fifth cell, or includes In the fifth cell and the same-frequency cell of the fifth cell, the number of reselection failures of the fifth cell is the number of times that the terminal device is continuously prohibited from being accessed by the fifth cell. The "fifth cell" described here can be understood as, for example, one cell among N cells, but the same processing can be performed on each of the N cells. For example, the fifth cell above may be replaced with the i-th cell, i takes an integer from 1 to N, that is, the same processing is performed on each of the N cells, that is, the second cell deal with.

With reference to the first aspect, in a possible implementation manner of the first aspect, in the process of cell reselection, determining that the second cell is prohibited from accessing includes: when the result of the access restriction check is the The second cell is forbidden to access, and the result of the last access restriction check of the second cell is that when the second cell is forbidden to access, the number of reselection failures is increased by 1, or, when The result of the access restriction check is that the second cell is barred from access, and the result of the last access restriction check of the second cell is that the second cell is not barred from access. The number of reselection failures is cleared.

If the number of reselection failures corresponding to the second cell records the number of times the terminal device is continuously barred from access by the second cell, then here is how to record the number of reselection failures and how to set the timer.

For example, the second cell specifically includes N cells. If the second cell is any cell whose access is forbidden during the cell reselection, this implementation may be for each of the N cells Yes, it can be understood that, during the cell reselection process, determining that the fifth cell of N cells is forbidden to access includes: when the result of the access restriction check is that the fifth cell is forbidden Access, and the result of the last access restriction check of the fifth cell is that when the fifth cell is prohibited from accessing, increase the number of reselection failures by 1, or, when the access restriction The result of the verification is that the fifth cell is forbidden to access, and the result of the last time the fifth cell was restricted by access restriction is that the fifth cell is not forbidden to access, the number of failed reselections Cleared. The "fifth cell" described here can be understood as, for example, one cell among N cells, but the same processing can be performed on each of the N cells. For example, the fifth cell above may be replaced with the i-th cell, i takes an integer from 1 to N, that is, the same processing is performed on each of the N cells, that is, the second cell deal with.

In a second aspect, a communication device is provided. The communication device includes a processor for implementing the method described in the first aspect or various possible designs of the first aspect. The communication device may further include a memory for storing program instructions and data. The memory is coupled to the processor, and the processor can call and execute program instructions stored in the memory for implementing the method described in the first aspect or various possible designs of the first aspect. The communication device is, for example, the first communication device described above, and for example, the communication device is a communication device or a chip provided in the communication device. Exemplarily, the communication device is a terminal device. among them,

The memory is used to store instructions:

The processor is configured to execute the instruction, and in the process of cell reselection, determine that the second cell is forbidden to access; determine the highest ranked cell according to the cell reselection criteria; when the highest ranked cell changes and meets In the first condition, the access barring restriction on at least one cell is lifted, the at least one cell is a cell barred from access during the cell reselection process, and the at least one cell includes the second cell And / or the same-frequency cell of the second cell.

With reference to the second aspect, in a possible implementation manner of the second aspect, the processor is configured to determine the highest ranked cell according to the cell reselection criterion in the following manner:

After accessing the first cell through cell reselection, determine the highest ranked cell according to the cell reselection criteria; or,

When no suitable cell is found during the cell reselection, the highest ranked cell is determined according to the cell reselection criterion.

With reference to the second aspect, in a possible implementation manner of the second aspect, the highest ranked cell is the first cell or the second cell or other than the first cell and the second cell Other communities.

With reference to the second aspect, in a possible implementation manner of the second aspect, access to the second cell is prohibited, which means that the second cell is excluded from the candidate list for cell reselection.

With reference to the second aspect, in a possible implementation manner of the second aspect, the second cell is specifically N cells, and the processor is configured to change the highest ranked cell in the following manner and satisfy the first When conditions are met, remove the barred access restriction on at least one cell:

When the highest-ranked cell changes and the first condition is met, the access prohibition restriction on the N cells is lifted, and the N cells are all prohibited from being accessed during the cell reselection process. Enter the community.

With reference to the second aspect, in a possible implementation manner of the second aspect, the first condition is that the timer times out.

With reference to the second aspect, in a possible implementation manner of the second aspect, the processor is configured to determine that the second cell is forbidden to access during the cell reselection process as follows:

During the cell reselection process, perform an access restriction check on the second cell, where the access restriction check is used to check whether a communication device can access the second cell;

It is determined that the result of the access restriction check is that the second cell is prohibited from accessing, and the timer is started, wherein the second cell is the first to be prohibited from accessing during the cell reselection process The incoming cell, or the second cell is any cell whose access is forbidden during the cell reselection process.

With reference to the second aspect, in a possible implementation manner of the second aspect, the processor is configured to determine that the result of the access restriction check is that the second cell is prohibited from accessing, and start the Timer:

Determine that the result of the access restriction check is that the second cell is prohibited from accessing, and start a first timer; or,

The result of determining the access restriction check is that the second cell and the same-frequency cell of the second cell are prohibited from accessing, and a second timer is started.

With reference to the second aspect, in a possible implementation manner of the second aspect, if the second cell is the first cell forbidden to access during the cell reselection process, the processor uses In the following manner, when the highest-ranking cell changes and the timer expires, the access restriction on at least one cell is lifted:

When the highest-ranked cell changes and the first timer or the second timer times out, the access barring restriction on all cells whose access is barred during the cell reselection process is released.

With reference to the second aspect, in a possible implementation manner of the second aspect, the second cell is any cell whose access is prohibited during the cell reselection process, then,

The processor is used to release the access barring restriction on at least one cell when the highest-ranking cell changes and the timer expires in the following manner: when the highest-ranking cell changes and the first timer When it times out, remove the access prohibition restriction on the second cell; or,

The processor is configured to release the access prohibition restriction on at least one cell when the highest-ranking cell changes and the timer expires in the following manner: when the highest-ranking cell changes and the second timer When it times out, release the access prohibition restriction on the second cell and the same-frequency cell of the second cell, or release the access prohibition restriction on the same-frequency cell of the second cell.

With reference to the second aspect, in a possible implementation manner of the second aspect, the communication apparatus may further include a transceiver, and the transceiver is used for the communication apparatus to communicate with other devices. Illustratively, the transceiver is, for example, a communication interface. For example, if the communication device is a communication device, the communication interface may be a transceiver in the communication device, for example, a radio frequency transceiver component in the communication device, or, if the communication device is a chip provided in the communication device, then The communication interface may be an input / output interface of the chip, such as input / output pins and the like. The transceiver is used to receive first information from a network device, and the first information is used to indicate the duration of the timer.

With reference to the second aspect, in a possible implementation manner of the second aspect, the first condition is that during a cell reselection process, a result of performing an access restriction check on the second cell is the The second cell and the co-frequency cell of the second cell are barred from access.

With reference to the second aspect, in a possible implementation manner of the second aspect, the first condition is that the timer times out, and the number of reselection failures of the second cell is less than or equal to a threshold; the at least one cell Including the second cell, or a co-frequency cell including the second cell and the second cell, and the number of reselection failures of the second cell is that the communication device is detected within the timing duration of the timer The number of times the second cell continuously prohibits access, or the number of reselection failures of the second cell is the number of times the communication device is prohibited from access by the second cell within the timing duration of the timer.

The number of reselection failures of the second cell is the number of times the communication device is continuously prohibited from being accessed by the second cell within the timing duration of the timer, then, when the result of the access restriction check is When the second cell is forbidden to access, and the result of the last access restriction check of the second cell is that the second cell is forbidden to access, and the timer is not timed out, the Increase the number of failed selections by 1, or when the result of the access restriction check is that the second cell is barred from access, and the result of the last access restriction check of the second cell is the second When the cell is not prohibited from accessing, clear the number of reselection failures and start or restart the timer; or, the number of reselection failures of the second cell is the The number of times access by the second cell is prohibited within the time duration, then, when the result of the access restriction check is that the second cell is prohibited from access and the timer has not expired, the Increase the number of failed reselections by 1, or when the result of the access restriction check is The second cell is prohibited access, the timer is started, and the reselection failure count is incremented.

With reference to the second aspect, in a possible implementation manner of the second aspect, the first condition is that the number of reselection failures of the second cell is less than or equal to a threshold, and the at least one cell includes the first A second cell, or a co-frequency cell including the second cell and the second cell, and the number of reselection failures of the second cell is the number of times the communication device is continuously barred from access by the second cell.

When the result of the access restriction check is that the second cell is forbidden to access, and the result of the last access restriction check of the second cell is that the second cell is forbidden to access, it will The number of reselection failures is increased by 1, or, when the result of the access restriction check is that the second cell is prohibited from access, and the result of the last time the second cell was checked by the access restriction is When the access of the second cell is not prohibited, reset the number of reselection failures to zero.

For the technical effect brought about by the second aspect or various possible implementation manners of the second aspect, reference may be made to the introduction to the technical effect of the first aspect or various possible implementation manners of the first aspect.

In a third aspect, a communication device is provided. The communication device is, for example, the aforementioned first communication device. The communication device is configured to execute the method in the first aspect or any possible implementation manner of the first aspect. Specifically, the communication device may include a module for performing the method in the first aspect or any possible implementation manner of the first aspect, for example, including a first determination module, a second determination module, and a release module that are coupled to each other, Optionally, a transceiver module may also be included. Exemplarily, the communication device is a communication device. Exemplarily, the communication device is a terminal device.

According to a fourth aspect, a computer-readable storage medium is provided on which a computer program is stored, and when the program is executed by a processor, the method in the first aspect or any possible implementation manner of the first aspect is implemented.

According to a fifth aspect, there is provided a computer program product containing instructions that store instructions, which when executed on a computer, cause the computer to perform the first aspect or any possible implementation of the first aspect The method described in the way.

In practical applications, the state where a cell is forbidden to access may continue for a long period of time. Then, through the first condition provided by the embodiment of the present application, as much as possible, when a cell is forbidden to access, the terminal device can Reducing the number of verifications of the cell, thereby reducing the invalid power consumption of the terminal device, and also making the verification of the cell by the terminal device more effective.

BRIEF DESCRIPTION

Figure 1 is a schematic diagram of the current cell reselection mechanism;

2 to 4 are schematic diagrams of three application scenarios according to an embodiment of the present application;

5 is a flowchart of a first cell reselection method provided by an embodiment of this application;

6 is a flowchart of a second cell reselection method provided by an embodiment of this application;

7A-7B are flowcharts of the third cell reselection method provided by the embodiments of the present application;

8 is a schematic block diagram of a first communication device provided by an embodiment of this application;

9 is another schematic block diagram of a second communication device provided by an embodiment of this application;

10 is a schematic block diagram of a communication device provided by an embodiment of this application;

11 is another schematic block diagram of a communication device provided by an embodiment of this application;

FIG. 12 is yet another schematic block diagram of the communication device provided by the embodiment of the present application.

detailed description

In order to make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Hereinafter, some terms in the embodiments of the present application will be explained to facilitate understanding by those skilled in the art.

1) Terminal devices, including devices that provide voice and / or data connectivity to users, for example, may include handheld devices with wireless connection capabilities, or processing devices connected to wireless modems. The terminal device can communicate with the core network via a radio access network (RAN) and exchange voice and / or data with the RAN. The terminal equipment may include user equipment (user equipment, UE), wireless terminal equipment, mobile terminal equipment, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station), mobile station (mobile), remote Remote station, access point (AP), remote terminal equipment (remote terminal), access terminal equipment (access terminal), user terminal equipment (user terminal), user agent (user agent), or user Equipment (user device), etc. For example, it may include a mobile phone (or called a “cellular” phone), a computer with a mobile terminal device, a portable, pocket-sized, handheld, built-in or on-board mobile device, smart wearable device, and the like. For example, personal communication service (PCS) telephones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (wireless local loop (WLL) stations, personal digital assistants (personal digital assistants, PDA), and other equipment. It also includes restricted devices, such as devices with low power consumption, or devices with limited storage capacity, or devices with limited computing power. Examples include bar code, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners and other information sensing equipment.

By way of example and not limitation, in the embodiments of the present application, the terminal device may also be an in-vehicle terminal device or a wearable device. Wearable devices can also be referred to as wearable smart devices. It is a general term for applying wearable technology to intelligently design everyday wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only a hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction. Generalized wearable smart devices include full-featured, large-sized, complete or partial functions that do not depend on smartphones, such as: smart watches or smart glasses, and only focus on a certain type of application functions, and need to cooperate with other devices such as smartphones Use, such as all kinds of smart bracelets, smart helmets, smart jewelry for sign monitoring.

2) Network equipment, for example, including access network (AN) equipment. An access network device such as a base station (for example, an access point) may refer to a device that communicates with a wireless terminal device through one or more cells on an air interface in an access network. The network device can be used to convert received air frames and Internet Protocol (IP) packets to each other as a router between the terminal device and the rest of the access network, where the rest of the access network can include an IP network. The network equipment can also coordinate attribute management of the air interface. For example, the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-A), or It may also include the fifth generation mobile communication technology (fifth generation, 5G) new radio (NR) system, the next generation node B (next generation node B, gNB) or it may also include a cloud access network (cloud radio access) The centralized unit (CU) and distributed unit (DU) in the network, CloudRAN) system are not limited in the embodiments of the present application.

3) The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "Multiple" refers to two or more. In view of this, in the embodiments of the present application, "multiple" may also be understood as "at least two". "At least one" can be understood as one or more, such as one, two or more. For example, including at least one means including one, two or more, and does not limit which ones are included, for example, including at least one of A, B, and C, then the included may be A, B, C, A and B, A and C, B and C, or A and B and C. "At least two" can be understood as two or more. In the same way, the understanding of the description of "at least one" is similar. "And / or" describes the association relationship of the related objects, indicating that there can be three relationships, for example, A and / or B, which can indicate: there are three situations where A exists alone, A and B exist simultaneously, or B exists alone. In addition, the character "/", unless otherwise specified, generally indicates that the related object is a "or" relationship.

And, unless stated to the contrary, the embodiments of the present application refer to ordinal numbers such as "first" and "second" to distinguish between multiple objects, and are not used to limit the order, timing, priority, or Importance. For example, the first cell and the second cell are only used to distinguish different cells, and do not mean that the two cells have different priority or importance.

The above describes some concepts involved in the embodiments of the present application, and the technical features involved in the embodiments of the present application are described below.

Taking the same frequency cell reselection as an example, the current cell reselection mechanism can refer to FIG. 1.

When performing cell reselection, the terminal device sorts the candidate cells included in the cell reselection candidate list according to the cell reselection criteria. For example, the terminal device selects candidate cells that satisfy the S criterion in the cell reselection candidate list according to the R criterion For sorting, for example, it can be understood that the cell reselection criterion includes the S criterion and / or the R criterion, and then the terminal device sorts the cells according to the cell reselection criterion. Among them, the cell that meets the S criterion can be simply understood as a cell whose signal quality meets certain requirements, and is sorted according to the R criterion, for example, according to the order of the signal quality of the cell from high to low, for the highest ranked cell, it can be called It is the highest ranked cell. When the duration of the terminal device camping on the current serving cell is greater than 1s, and the duration of the highest ranking cell is not the serving cell of the terminal device is greater than the preset threshold TreselectionRAT, the terminal device reads the system information of the highest ranking cell to determine the highest Sort the cells to perform access bar check.

If the verification result is "not barred", indicating that the highest ranked cell is allowed to be accessed by the terminal device, the terminal device may reselect to the highest ranked cell and continue the cell re-evaluation as described above Election process.

Or, if the check result is "barred", it indicates that the highest ranked cell is forbidden to access to the terminal device. If the terminal device does not read the master information block of the highest ranked cell (master information block) , MIB) and system information block (SIB) 1, then the terminal device determines that the terminal device prohibits access to the highest-ranking cell. At this time, only the highest-ranking cell prohibits access to the terminal device. The duration is at most 300s. If the terminal device reads the MIB and SIB1 of the highest-ranked cell, and if the internal frequency reselection (intraFreqReselection) in the read MIB is "allowed", the terminal device determines The terminal device is forbidden to access the highest-ranking cell, and the duration of the forbidden access is at most 300s, and if the parameter intraFreqReselection in the read MIB is "not allowed", the terminal device determines that the terminal device is prohibited Access to the highest-ranked cell and the same-frequency cell of the highest-ranked cell, the duration of access prohibited is 300s, at this time the highest ranked Intra-frequency cells and cells of the highest ranked cell prohibit the access to the terminal device.

If the check result is "barred", the terminal device continues to sort the remaining cells according to the R criterion. The so-called remaining cells are other than the cells that are prohibited from accessing the terminal device in the candidate list of cell reselection. For the standard cell, the terminal device continues to perform the bar check process as described above on the highest ranked cell obtained by the reselection order until the terminal device reselects to enter a cell.

After the terminal device reselects and camps on a cell, the terminal device will continue the cell reselection process. Then, in the cell reselection process at this time, if the highest sorted cell sorted by the terminal device according to the R criterion changes, the terminal device will be barred from accessing during the cell reselection process before entering the currently camped cell The cells of are re-incorporated into the candidate list of cell reselection of the terminal device, so that these cells participate in the cell reselection process again.

In general, the system information update period is 64 to 4096 radio frames (40.96s maximum), and even if the system information is updated, the information that determines whether a cell is barred from accessing does not necessarily change. The length of time to complete a cell reselection is on the order of seconds, and the field test found that the highest ranked cell changes very frequently. Then, the cell that was originally forbidden to access, after being re-incorporated into the cell reselection candidate list of the terminal device, may still be barred from accessing during the process of re-participating in cell reselection, but the terminal device still needs to The verification of these cells results in a large power consumption of the terminal equipment. In addition, compared with the LTE system, the NR system has a smaller cell range and the overlap between the cells is more obvious, so the signal quality of the cell is more likely to change, which results in the most frequent change of the highest ranked cell during sequencing. Then, the terminal device needs to re-check the bar of the previously prohibited cell more frequently, so that the terminal device has more invalid power consumption.

In view of this, the technical solutions of the embodiments of the present application are provided. In the embodiment of the present application, when the terminal device performs cell reselection again in the first cell, if the highest ranked cell changes and the first condition is met, the second cell that was previously forbidden to access will be used as the candidate cell again. If the first condition is not satisfied, the second cell that was previously prohibited from accessing will not be used as a candidate cell. Then, through the first condition, it is possible to enable the terminal device to determine whether the previously prohibited cell is prohibited from accessing information when the previously prohibited cell is used as a candidate cell again. In this way, the terminal device can check the cell more effectively, and reduce unnecessary power consumption of the terminal device.

The embodiments of the present application can be applied to an evolved universal mobile communication system terrestrial radio access network (evolved universal mobile telecommunications system terrestrial radio access network, E-UTRAN) system, or a next generation (NG) -radio access network (NG) Radio access network (RAN) system, or NR system, or can also be applied to next-generation communication systems or similar communication systems.

Please refer to FIG. 2, which is an application scenario according to an embodiment of the present application, or a network architecture applied in an embodiment of the present application. The network architecture is, for example, a network architecture of an E-UTRAN system. In FIG. 2, E-UTRAN is composed of eNBs and provides protocols for the E-UTRA user plane and control plane of terminal equipment. The eNBs are interconnected through the X2 interface. The eNB is also connected to a mobility management entity (MME) through an S1-MME interface, and is connected to a service gateway (S-GW) through an S1-U interface. Taking 3 eNBs as an example in FIG. 2, and eNBs are represented as network devices in FIG. 2, which are a first network device, a second network device, and a third network device, respectively. The terminal device is not shown in FIG. 2, in fact, each eNB in FIG. 2 may serve one or more terminal devices. The technical solution provided in the embodiment of the present application can serve the terminal device through the terminal device and eNB implementation.

Please refer to FIG. 3, which is another application scenario of the embodiment of the present application, or another network architecture applied by the embodiment of the present application. The network architecture is, for example, a network architecture of the NG-RAN system. In Figure 3, gNB provides terminal equipment-oriented NR user plane and control plane protocols, and gNB is connected to the core network of the 5G system, and ng-eNB provides terminal equipment-oriented E-UTRA user plane and control plane protocols, ng-eNB It is also connected to the core network of the 5G system. The gNB and ng-eNB are interconnected through the Xn interface, and both gNB and ng-eNB are connected to the access and mobility management function (AMF) in the 5G core network (5GC) through the NG interface / User plane function (user plane function, UPF). In FIG. 3, the fourth network device and the fifth network device are both gNB, and the sixth network device and the seventh network device are both ng-gNB. In FIG. 3, the terminal device is not shown. In fact, each gNB or ng-gNB in FIG. 3 may serve one or more terminal devices. The technical solutions provided in the embodiments of the present application can be implemented through the terminal device and The gNB serving the terminal device can be executed, or can also be executed through the terminal device and the ng-gNB serving the terminal device.

Please refer to FIG. 4, which is another application scenario of the embodiment of the present application, or another network architecture applied by the embodiment of the present application. The network architecture is, for example, a network architecture of an NR system. In Figure 4, the NR system consists of gNB and provides protocols for the NR user plane and control plane of the terminal equipment. The gNB are interconnected through the X2 interface. The gNB is connected to the AMF / UPF in the 5G core network through the NG interface. Taking three gNBs as an example in FIG. 4, and gNB are represented as network devices in FIG. 4, which are an eighth network device, a ninth network device, and a tenth network device, respectively. The terminal device is not shown in FIG. 4, in fact, each gNB in FIG. 4 may serve one or more terminal devices, and the technical solution provided by the embodiment of the present application can serve the terminal device through the terminal device and gNB implementation.

Figures 2 to 4 above only introduce several possible application scenarios. The application scenarios of the embodiments of the present application are not limited to this. For example, when the communication system applied by the embodiments of the present application changes, the corresponding application scenarios will also be different. Variety.

The technical solutions provided by the embodiments of the present application will be described below in conjunction with the accompanying drawings of the specification.

The embodiment of the present application provides the first cell reselection method, please refer to FIG. 5, which is a flowchart of the method. This method can be applied to the scenario shown in FIG. 2 or FIG. 3 or FIG. 4. In the following introduction process, the method provided in the embodiment of the present application is applied to the application scenario shown in FIG. 2 or FIG. 3 or FIG. 4 as example. In addition, the method may be performed by two communication devices, such as a first communication device and a second communication device, where the first communication device may be a network device or a network device capable of supporting the functions required by the method Communication device, or the first communication device may be a terminal device or a communication device capable of supporting the function required by the method by the terminal device, and of course, may be other communication devices, such as a chip system. The same is true for the second communication device. The second communication device may be a network device or a communication device capable of supporting the network device to implement the functions required by the method, or the second communication device may be a terminal device or capable of supporting the terminal device to implement the method. Of course, the communication device with the required function can also be other communication devices, such as a chip system. There is no limitation on the implementation manner of the first communication device and the second communication device, for example, the first communication device may be a network device, the second communication device is a terminal device, or the first communication device and the second communication device are both networks The device, or both the first communication device and the second communication device are terminal devices, or the first communication device is a network device, and the second communication device is a communication device capable of supporting the functions required by the method by the terminal device, and so on. The network device is, for example, a base station.

For ease of introduction, in the following, the method is performed by a network device and a terminal device as an example, that is, the first communication device is a terminal device and the second communication device is a network device as an example. If the method provided in the embodiment of the present application is applied to the application scenario shown in FIG. 2, the network device described below may be the first network device, the second network device, or the third network device in FIG. 2. The method provided in the embodiment of the application is applied to the application scenario shown in FIG. 3, and the network device described below may be the fourth network device, the fifth network device, the sixth network device, or the seventh network device in FIG. 3. When the method provided by the embodiment of the present application is applied to the application scenario shown in FIG. 5, the network device described below may be the eighth network device, the ninth network device, or the tenth network device in FIG.

S51. In the process of cell reselection, the terminal device determines the highest ranked cell (highest ranked cell) according to the cell reselection criteria.

For example, according to the R criterion, the terminal device determines the highest ranked cell from the candidate cells included in the candidate list for cell reselection that satisfy the S criterion. For example, according to the R criterion, the terminal device sorts the candidate cells that meet the S criterion included in the candidate list for cell reselection. For example, the terminal device can sort the cells according to the signal quality of the cell from high to low, so that the highest ranked cell can be determined .

Among them, the ranking rules adopted by the terminal equipment are introduced as follows: the ranking criteria Rs and Rn of the serving cell and the neighboring cell are defined as:

Rs = Qmeas, s + Qhyst-Qoffsettemp

Rn = Qmeas, n-Qoffset-Qoffsettemp

among them,

Among them, Qhyst is used to set the hysteresis value of the sorting condition, and Qoffsetfrequency is the frequency offset of the NR frequency point of the same priority. Rs is for the current serving cell, and Rn is for other cells. For example, Rs and Rn both calculate RSRP values. The terminal device can obtain Qmeas, n and Qmeas, s through measurement, and then the RSRP of the current serving cell and the RSRP of other candidate cells can be calculated by the above formula, so that the candidate cells can be matched according to the calculation results (candidate cells also include the current serving cell) Sorting is performed, and after sorting, the cell at the head of the sequence (that is, the cell with the largest R value) is the highest sorted cell.

For example, the highest ranked cell determined by the terminal device is the second cell. Among them, the highest ranked cell may also be described as the best cell. In various embodiments of the present application, the two features may be interchanged.

S52. The terminal device performs bar check on the second cell. If the result of the bar check is "not barred", S53 is executed, or if the result of the bar check is "barred", S54 is executed.

After determining the highest ranked cell, the terminal device may perform a bar check on the determined highest ranked cell to determine whether the terminal device can access the cell. For example, the highest ranked cell determined by the terminal device is the second cell, and the terminal device may perform a bar check on the second cell to determine whether the terminal device can access the second cell.

S53. If the result of the bar check is that the second cell is "not barred", the terminal device reselects to access the second cell. Continue to S58.

For example, the result of the bar check is that the second cell is "not barred", indicating that the terminal device is allowed to access the second cell, then the terminal device may reselect to access the second cell. In various embodiments of the present application, the terminal device reselects to access a cell, which can also be understood as the terminal device camping on a cell, the two concepts are interchangeable, for example, the terminal device reselects to access the second cell, It can also be described as that the terminal device camps on the second cell.

As an optional method, before reselecting to access the second cell, the terminal device may also determine whether the second cell meets the S criterion. If the S criterion is met, the terminal device reselects to access the second cell, otherwise the terminal device may not Reselect the access to the second cell, but continue the cell reselection process.

S54. If the result of the bar check is that the second cell is "barred", the second cell is prohibited from accessing. Next, S55 is executed.

In various embodiments of the present application, access to the second cell is prohibited, which means that the second cell is excluded from the candidate list for cell reselection. In addition, in various embodiments of the present application, the cell is prohibited from accessing, and it can also be understood that the cell is prohibited from camping, "access prohibited" and "parking prohibited", these two concepts are in the embodiments of the present application Interchangeable. For example, the access of the second cell is prohibited, and it can also be described that the second cell is prohibited from camping.

If the result of the bar check is that the second cell is "barred", indicating that the second cell prohibits access to the terminal device, the terminal device does not add the second cell to the candidate cell of the terminal device, that is, the terminal device The cell is excluded from the candidate cell of the terminal device, or the terminal device removes the second cell from the candidate cell of the terminal device, for example, deletes the information of the second cell from the candidate list for cell reselection. In addition, the terminal device also starts a timer. Specifically, if the check result is "barred", it indicates that the second cell is prohibited from accessing the terminal device. If the terminal device does not read the MIB and SIB1 of the second cell, the terminal device determines that the terminal device is barred When accessing the second cell, the terminal device excludes the second cell from the candidate cell of the terminal device and starts a timer. At this time, only the second cell prohibits access to the terminal device. It can be considered that the timer is for the second cell. Cell; and if the terminal device reads the MIB and SIB1 of the highest ranked cell, and, if the parameter intraFreqReselection in the read MIB is "allowed", the terminal device determines that the terminal device prohibits access to the second cell, then The terminal device excludes the second cell from the candidate cells of the terminal device and starts a timer. It can be considered that the timer is for the second cell, and if the parameter intraFreqReselection in the read MIB is "not allowed", then the The terminal device determines that the terminal device prohibits access to the second cell and the co-frequency cell of the second cell, and the terminal device starts a timer. At this time, the second If the same-frequency cell of the cell and the second cell prohibits access to the terminal device, the terminal device excludes the same-frequency cell of the second cell and the second cell from the candidate cell of the terminal device. In the case of two cells, the timer may also be considered for the second cell and the same frequency cell of the second cell.

Regarding the number of timers, there are also different implementations.

As a first implementation of the number of timers, there is only one timer for a cell. No matter whether the parameter intraFreqReselection in the read MIB is "allowed" or "not allowed", the terminal device starts the same timer, so the specific process can refer to the description in the previous paragraph. In this implementation mode, the terminal device only needs to set a timer, which is relatively simple to implement. S54 in FIG. 5 takes this case as an example.

As a second embodiment of the number of timers, two timers can be set for a cell, namely a first timer and a second timer, the first timer is represented as T _barred-cell , the second timer For example, expressed as T _{barred-frequency} . For example, if the result of the bar check is that the second cell is "barred", and the parameter intraFreqReselection in the MIB read by the terminal device is "allowed", that is, the terminal device determines that the terminal device cannot access the second cell, or It is described that the terminal device determines that co-frequency reselection is allowed. Alternatively, the terminal device may start a timer. If the terminal device starts the timer, the first timer is started, or the terminal device may not start the timer. If the result of the bar check is that the second cell is "barred" and the parameter intraFreqReselection in the MIB read by the terminal device is "not allowed", that is, the terminal device determines that the terminal device cannot access the second cell and the second cell Of the same frequency cell, or described as the terminal device determines that the same frequency reselection is not allowed, optionally, the terminal device can start a timer, if the terminal device starts the timer, the second timer is started, or, The terminal device may not start the timer. That is, in the second embodiment of the number of timers, the terminal device may start the first timer and / or the second timer. The first timer and / or the second timer may include the first timer or the second timer, or include the first timer and the second timer.

For example, when there is only one timer, the terminal device can obtain the timer duration from the network device. For example, the network device sends first information to the terminal device, and the first information is used to indicate the timing duration of the timer, and then the terminal device can determine the timing duration of the timer after receiving the first information from the network device. The first information is, for example, system information of the second cell, or may be other information. For example, the network device may determine the timing duration of the timer, and indicate the timing duration of the timer to the terminal device through the system information of the second cell. Or the terminal device may also obtain the timing duration of the timer through other methods, without specific limitation. For example, the network device may set the timing duration of the timer according to the system information update period of the cell, for example, the timer timing duration may be set to be greater than or equal to the system information update period of the cell, or the network device may also set the related system according to the bar of the cell The update time of the information sets the timing duration of the timer, etc., so that the removal of the barred access restriction for the cell can be adapted to the update period of the system information of the cell, or to the update time of the relevant system information of the bar of the cell , Thereby reducing unnecessary cell reselection operations of the terminal device, and correspondingly reducing the power consumption of the terminal device.

When there is a first timer, the terminal device may also obtain the timing duration of the first timer from the network device. For example, the network device sends first information to the terminal device, and the first information is used to indicate the timing duration of the first timer. After receiving the first information from the network device, the terminal device can determine the timing duration of the first timer. Similarly, when there is a second timer, the terminal device can also obtain the timing duration of the second timer from the network device. For example, the network device sends first information to the terminal device, and the first information is used to indicate the timing duration of the second timer. After the terminal device receives the first information from the network device, it can determine the timing duration of the second timer. The first information is, for example, system information of the second cell. For example, the network device may determine the timing duration of the first timer and the timing duration of the second timer, and indicate the timing duration of the first timer and the timing duration of the second timer to the terminal device through the system information of the second cell . Alternatively, the terminal device may also obtain the timing duration of the first timer and the timing duration of the second timer in other ways, without specific limitation. For example, the network device may set the timing duration of the first timer and / or the second timer according to the system information update period of the cell. For example, the timing duration of the first timer and / or the second timer may be set to be greater than or equal to the cell The system information update period, or the network device can also set the timing duration of the first timer and / or the second timer according to the update time of the relevant system information of the cell bar, so that the access prohibition for the cell is lifted It can be adapted to the update period of the system information of the cell, or the update time of the relevant system information of the bar adapted to the cell, thereby reducing unnecessary cell reselection operations of the terminal device and correspondingly reducing the power consumption of the terminal device.

In this embodiment of the present application, the size between the timing duration of the first timer and the timing duration of the second timer is not limited. For example, because the second timer corresponds to a method that does not allow co-frequency reselection, then within the timing duration of the second timer, both the second cell and the same-frequency cell of the second cell are forbidden for the terminal device to connect. If you enter the terminal device, there may be more cells that are prohibited from access for the terminal device. The selection range of the terminal device when performing cell reselection will become smaller, which may affect the terminal device reselection to a more suitable cell. Therefore, , The timing duration of the second timer may be relatively short, so that the terminal device can have a relatively large selection range when performing cell reselection. In this case, the timing duration of the second timer may be less than that of the first timer Time duration. However, the embodiment of the present application is not limited to this, for example, the timing duration of the first timer may be equal to the timing duration of the second timer, or the timing duration of the first timer may also be greater than the timing duration of the second timer.

S55. The terminal device determines the highest ranked cell from the remaining cells included in the candidate list for cell reselection according to the cell reselection criteria.

The so-called remaining cells are the cells that meet the S criterion except for the cells forbidden to access in S54 in the candidate list for cell reselection. For example, the cells forbidden to access in S54 are the second cell, then the remaining cells The cell is the cell that meets the S criterion except the second cell in the candidate list for cell reselection, or the cell whose access is forbidden in S54 is the same frequency cell of the second cell and the second cell, then the remaining cell is the cell In the reselected candidate list, other cells that satisfy the S criterion except for the second cell and the same-frequency cell of the second cell.

It can be understood that, according to the R criterion, the terminal device determines the highest ranked cell from the candidate cells included in the candidate list for cell reselection that meet the S criterion except for the cells that are prohibited from access. For example, according to the R criterion, the terminal device sorts the candidate cells included in the candidate list of the cell reselection that meet the S criterion except for the cells that are prohibited from access. For example, the terminal device sorts the cells according to the signal quality from high to low The order of the order is determined so that the highest ranked cell can be determined. For example, the highest ranked cell determined by the terminal device is the third cell.

S56. The terminal device performs bar check on the third cell.

After determining the highest ranked cell, the terminal device may perform a bar check on the determined highest ranked cell to determine whether the terminal device can access the cell. For example, the highest ranked cell determined by the terminal device is the third cell, and the terminal device may perform a bar check on the third cell to determine whether the terminal device can access the third cell. In this embodiment, the terminal device checks the bar of the third cell as “not barred” as an example.

S57. If the result of the bar check is that the third cell is "not barred", the terminal device reselects to access the third cell. Continue to S58.

For example, the result of the bar check is that the third cell is "not barred", indicating that the terminal device is allowed to access the third cell, and then the terminal device may reselect to access the third cell.

As an optional method, before reselecting to the third cell, the terminal device may also determine whether the third cell satisfies the S criterion. If the S criterion is met, the terminal device reselects to the third cell, otherwise the terminal device may not reselect Go to the third cell, but continue the cell reselection process.

Of course, the result of the bar check may also be that the third cell is "barred". If the result of the bar check is that the third cell is "barred", the terminal device does not add the third cell to the candidate cell of the terminal device, that is, The third cell is excluded from the candidate cells of the terminal device, and the cell reselection process can be continued. For this specific process, refer to S54. If the result of the bar check is that the second cell is "barred", the processing method of the terminal device. This can be understood as a cyclic execution process. If the cell checked by the terminal device is always bar, the terminal device will cyclically execute the process of selecting the cell and performing bar check on the cell until the terminal device reselects to a cell .

In addition, in the embodiments of the present application, in addition to the number of timers described above, there are two ways to implement the setting of the timer.

As a first implementation of setting the timer, a timer may be set for each cell that is forbidden to access before the terminal device reselects to a new cell, in this case, it can be understood as, The second cell is any cell whose access is prohibited during the cell reselection process before the terminal device reselects to the first cell. For example, in S54, the result of the bar check of the second cell by the terminal device is that the second cell is "barred", then the terminal device may start a timer for the second cell, and if in S56, the terminal device The result of the cell's bar check is that the third cell is "barred", then the terminal device can also start a timer for the third cell, which is equivalent to starting the corresponding timer for each "barred" cell, so that The timer setting is more targeted. For different cells, the timing duration of the corresponding timers may be equal, for example, they may all be obtained by the terminal device through the system information of the corresponding cell, or they may not be equal, and there is no specific limitation.

In the first implementation manner of setting the timer, if the timer specifically includes the first timer and the second timer, the implementation manner is also similar, and can also be directed to each terminal device before reselecting to a new cell. Each cell that is forbidden to access is set with a first timer or a second timer. In this case, it can also be understood that the second cell is a terminal device that re-selects the cell before reselecting to the first cell. Any cell that is forbidden to access during the selection process. For example, in S54, the result of the bar check of the second cell by the terminal device is that the second cell is "barred", and the parameter intraFreqReselection in the MIB read by the terminal device is "allowed", the terminal device can target the second cell The cell starts the first timer, or in S54, the result of the bar check of the second cell by the terminal device is that the second cell is "barred", and the parameter intraFreqReselection in the MIB read by the terminal device is "not allowed", The terminal device may start a second timer for the second cell; and if in S56, the terminal device performs a bar check on the third cell, the result is that the third cell is "barred" and the terminal device reads the MIB If the parameter intraFreqReselection is "allowed", the terminal device may start the first timer for the third cell, or in S54, the terminal device performs a bar check on the third cell. As a result, the third cell is "barred" and the terminal device If the parameter intraFreqReselection in the read MIB is "not allowed", the terminal device may start the second timer for the third cell. It is equivalent to that the corresponding first timer or second timer can be started for each "barred" cell. For different cells, the timing duration of the corresponding first timer may or may not be equal , The timing duration of the corresponding second timers may be equal, for example, the timing duration of these first timers and / or the timing duration of the second timers may be obtained by the terminal device through the system information of the corresponding cell, or Not equal, no specific restrictions.

As a second implementation of the timer setting, a unified timer can be set for all cells whose access is forbidden before the terminal device is reselected to a new cell, for example, the terminal device can start cell retry at a certain time After the selection, a timer is set for the cell that is "barred" for the first time. For example, the second cell is the first cell that is prohibited from accessing in the cell reselection process before the terminal device reselects to the first cell. For example, in S54, the result of the bar check of the second cell by the terminal device is that the second cell is "barred", and the second cell is the first one in which the terminal device is prohibited from accessing during the current cell reselection process. Cell, the terminal device can start a timer for the second cell. If, in S56, the terminal device performs a bar check on the third cell, the result is that the third cell is "barred", and the third cell is no longer the first one of the terminal devices in the current cell reselection process. In the entered cell, the terminal device may not start a timer for the third cell.

In the second implementation manner of setting the timer, if the timer specifically includes the first timer and the second timer, the implementation manner is also similar, and can also be directed to the terminal device before being reselected to a new cell. All cells that are prohibited from access are set to a uniform timing. For example, the second cell is the first cell that is prohibited from access during the cell reselection process before the terminal device reselects to the first cell. For example, in S54, the result of the bar check of the second cell by the terminal device is that the second cell is "barred", and the parameter intraFreqReselection in the MIB read by the terminal device is "allowed", and the second cell is the terminal device In the first cell forbidden to access in this cell reselection process, the terminal device may start a first timer for the second cell, or in S54, the terminal device performs a bar check on the second cell The second cell is "barred", and the parameter intraFreqReselection in the MIB read by the terminal device is "not allowed", and the second cell is the first one of the terminal devices that is forbidden to access during the current cell reselection process Cell, the terminal device may start a second timer for the second cell. If, in S56, the terminal device performs a bar check on the third cell, the result is that the third cell is "barred", and the parameter intraFreqReselection in the MIB read by the terminal device is "allowed", and the third cell is no longer a terminal If the device is the first cell forbidden to access in the current cell reselection process, the terminal device may not start the first timer for the third cell, or in S54, the terminal device performs bar check on the third cell The result is that the third cell is "barred", and the parameter intraFreqReselection in the MIB read by the terminal device is "not allowed", and the third cell is no longer the first terminal device in the current cell reselection process is prohibited In the accessed cell, the terminal device may not start the second timer for the third cell.

Or, in the second implementation manner of setting the timer, if the timer specifically includes the first timer and the second timer, the implementation manner is also similar, and may also be directed to the terminal device before reselecting to a new cell All cells whose access is prohibited are set to a uniform timing. For example, the second cell is the first cell whose access is prohibited during the cell reselection process before the terminal device reselects to the first cell. For example, in S54, the result of the bar check of the second cell by the terminal device is that the second cell is "barred", and the parameter intraFreqReselection in the MIB read by the terminal device is "allowed", and the second cell is the terminal device In the first cell forbidden to access in this cell reselection process, the terminal device may start a first timer for the second cell, or in S54, the terminal device performs a bar check on the second cell The second cell is "barred", and the parameter intraFreqReselection in the MIB read by the terminal device is "not allowed", and the second cell is the first one of the terminal devices that is forbidden to access during the current cell reselection process Cell, the terminal device may start a second timer for the second cell. In S56, if the result of the bar check of the third cell by the terminal device is that the third cell is "barred", and the parameter intraFreqReselection in the MIB read by the terminal device is "allowed", then, if the terminal device has If the first timer is started in the second cell, the terminal device may not restart the timer for the third cell, and if the terminal device starts the second timer for the second cell, the terminal device may restart the third timer for the third cell. A timer; or in S56, if the terminal device performs a bar check on the third cell and the result is that the third cell is "barred", and the parameter intraFreqReselection in the MIB read by the terminal device is "not allowed", then, If the terminal device has started the second timer for the second cell, the terminal device may not restart the timer for the third cell, and if the terminal device starts the first timer for the second cell, the terminal device may target The third cell starts the first timer again. That is to say, during the cell reselection process before the terminal device reselects to access the first cell, the terminal device can start up to two timers, namely a first timer and a second timer, each of which is targeted at One type of cell, for example, the first timer is for checking the cell that is "barred" and the parameter intraFreqReselection in the MIB read by the terminal device is "allowed", and the second timer is for checking that the "barred" and The parameter intraFreqReselection in the MIB read by the terminal device is a "not allowed" cell. Of course, it is also possible that during the cell reselection process before the terminal device reselects to access the first cell, the terminal device only starts the first timer or the second timer. For example, for a cell that is "barred" checked, the terminal device reads The parameters in the MIB of intraFreqReselection are all "allowed", then the terminal device starts only the first timer, but not the second timer. Or it is also possible that the terminal device does not start a timer during the cell reselection process before the terminal device reselects to access the first cell. For example, the terminal device reselection succeeds for the first time during the cell reselection process, and no cell is selected. barred ", the terminal device does not start the timer.

Then, in the second implementation manner of setting the timer, during a cell reselection process, the terminal device may start only one timer, or start up to two timers, which is relatively simple.

S58. After accessing the first cell through cell reselection, the terminal device determines the highest ranked cell according to the cell reselection criteria.

Where, if S51, S52, S53, and S58 are executed, then the first cell here is the second cell described above, or, if S51, S52, S54, S55, S56, S57, and S58 are executed, then The first cell here is the third cell mentioned above.

After reselecting to access the first cell, the terminal device may continue to perform the cell reselection process to reselect to a better cell. For example, the terminal device may determine the highest ranked cell from among the cells that satisfy the S criterion except for at least one cell among the candidate cells included in the candidate list of the cell reselection according to the cell reselection criterion, for example, the terminal device according to the R criterion , Determine the highest ranked cell from among the cells that satisfy the S criterion except for at least one cell among the candidate cells included in the candidate list for cell reselection. For example, according to the R criterion, the terminal device sorts the candidate cells included in the candidate list for cell reselection other than at least one cell that meet the S criterion. For example, the terminal device sorts the cells according to the signal quality from high to Sort in a lower order, so that the highest ranked cell can be determined. The at least one cell here includes a cell whose access is prohibited during the cell reselection process before the terminal device accesses the first cell. For example, the at least one cell may include a second cell and / or a co-frequency cell of the second cell. For example, if S51, S52, S54, S55, S56, S57, and S58 are performed, then at least one cell here includes the second cell, or includes the second cell and the same-frequency cell of the second cell.

In the embodiment of the present application, the terminal device determines the highest-ranked cell according to the cell reselection criteria. In addition to the scenario where the terminal device reselects to access the first cell, it can also occur in other scenarios. For example, there is another case, that is, S58 may also be that when no suitable cell is found in the cell reselection process, the terminal device determines the highest ranked cell according to the cell reselection criteria. This situation can be understood as that if the terminal device does not select a suitable cell during the cell reselection process, the terminal device may not camp on any cell, but enters the "select any cell (any cell selection)" state. Or, the terminal device may also enter the state of “camping on any cell”. When the terminal device does not select a suitable cell in the cell reselection process, the terminal device may also sort the candidate cells according to the cell reselection criteria to determine the highest ranked cell. Among them, FIG. 5 only takes the case where the terminal device accesses the first cell through cell reselection as an example.

S59. When the highest ranked cell changes and the first condition is met, the terminal device releases the access prohibition restriction on at least one cell.

In various embodiments of the present application, lifting the prohibited access restriction on the cell can also be understood as lifting the prohibited camping restriction on the cell, and the two concepts can be interchanged. For example, lifting the barred access restriction on at least one cell may also be described as lifting the barred parking restriction on at least one cell. The at least one cell may include a second cell and / or a co-frequency cell of the second cell.

For example, the second cell may be a cell, or may specifically be N cells, that is, the second cell is a general term for N cells, and N is a positive integer. In the introduction process of this article, the second cell is mainly taken as an example. Then, if the second cell is specifically N cells, it can be considered that the N cells are all cells that are prohibited during the cell reselection process before the terminal device reselects to access the first cell. In this case, each cell included in the second cell can be processed according to the solution provided in the embodiment of the present application, that is, the embodiment shown in FIG. 5 treats the second cell as a cell At this time, the processing method for the second cell can be used for processing each cell in the N cells. Then, when the highest ranked cell changes and the first condition is met, the terminal device lifts the access prohibition restriction on at least one cell, which can be considered to be the removal of the cell before the terminal device reselects access to the first cell Forbidden access restriction for all prohibited cells in the reselection process. This does not limit what the first condition is.

The first condition may include multiple types. In this embodiment, the first condition includes, for example, a timer timeout.

The highest ranked cell here is, for example, the first cell or the second cell. Since the terminal device accesses the first cell, it indicates that the first cell is the highest ranked cell when accessing the first cell, so the highest ranked cell may be the first cell. After the terminal device accesses the first cell, if it passes the cell The highest ranking cell determined by the reselection criterion is not the first cell, and it can be determined that the highest ranking cell has changed. Or, the highest-ranked cell here may also be a cell whose terminal device is forbidden to access during the cell reselection process before accessing the first cell, for example, during a cell reselection process before the terminal device accesses the first cell, The first cell to be denied access. Before the terminal device accesses the first cell, there may be a cell that is bard, for example, the second cell is the first cell that is prohibited from accessing, then the highest ranked cell here may be the second cell. Before the terminal device accesses the first cell, after the second cell, there may be a cell that is prohibited from accessing. For example, the third cell is also a cell that is prohibited from accessing, but the third cell is not the first cell to be prohibited from accessing. Cell, so it may not be the highest ranked cell here. Alternatively, the highest ranked cell may also be other cells than the first cell and the second cell, which is not specifically limited.

That is, in the cell reselection process after the terminal device accesses the first cell, if the highest ranked cell changes, a timer may be further determined, and if the timer expires, the terminal device releases the access prohibition on at least one cell Restriction (or release can also be described as removal), for example, the terminal device can add at least one cell to the candidate cell of the terminal device, or the terminal device adds information of at least one cell to the candidate list of the cell reselection of the terminal device, so At least one cell becomes a candidate cell of the terminal device during cell reselection. However, if the highest-ranking cell changes, but the timer does not expire, the terminal device may not remove the access prohibition restriction of at least one cell, that is, do not add at least one cell to the candidate cell of the terminal device, or that at least one The cell information is added to the candidate list for cell reselection of the terminal device, and the terminal device does not consider at least one cell when performing cell reselection. In practical applications, a cell may be blocked from accessing for a long period of time, so by controlling the timing of the timer, it can try to make the terminal device reduce access to the cell when access is prohibited. The number of verifications is performed, thereby reducing the invalid power consumption of the terminal device, and also making the verification of the cell by the terminal device more effective.

For example, if the timer adopts the first implementation in S57 and there is only one timer for a cell (that is, the first timer and the second timer are not distinguished), the timer in S59 can be considered as A cell, for example, S54 is executed in the previous step, and the timer in S59 is for the second cell as described above, then, if access is prohibited to the second cell, the at least one cell, The second cell corresponding to the timer described in S59 may be included, or if access to the second cell and the same-frequency cell of the second cell is prohibited, the at least one cell includes the second cell The same frequency cell as the second cell, or the same frequency cell as the second cell. In this case, for example, the second cell specifically includes N cells, the embodiment of the present application may perform the same operation on each cell included in the second cell, that is, for each cell included in the second cell, When the second cell is regarded as a cell, the operation mode of the second cell is operated, then at least one cell may also include cells whose access is all prohibited during the cell reselection process. Or, it may be that when the highest ranked cell changes and the first condition is met, the terminal device may release the access prohibition restriction on all the cells whose access is prohibited during the cell reselection process, then here is, When the highest-ranking cell changes and the timer expires, the terminal device may release the access prohibition restriction on all cells whose access is prohibited during the cell reselection process, that is, the at least one cell may include All cells whose access is prohibited during the cell reselection process, and the second cell at this time may be a cell, for example, any cell whose access is prohibited during the cell reselection process.

Or, if the timer uses the second timer implementation described in S57, and there is only one timer for a cell (that is, the first timer and the second timer are not distinguished), then the timing in S59 The device is aimed at all the cells whose access is prohibited during the cell reselection process before the terminal device reselects to access the first cell. The at least one cell may include one cell or multiple cells, for example, in the previous step In S54, the second cell is forbidden to access. If the forbidden access is the second cell, the at least one cell may include the second cell corresponding to the timer described in S59, or if the The barred access is the second cell and the same-frequency cell of the second cell, and the at least one cell may include the same-frequency cell of the second cell or the same-frequency cell of the second cell and the second cell. In addition, because cell reselection is a cyclically executed process, if the terminal device is also prohibited from accessing other cells during the cell reselection process before the terminal device accesses the first cell, the at least one cell may also include these A cell, for example, the verification result of the third cell by the terminal device is "barred", then the at least one cell further includes a third cell, or a co-frequency cell of the third cell, or includes a third cell and a third cell Same frequency cell. In this case, for example, the second cell specifically includes N cells, the embodiment of the present application may perform the same operation on each cell included in the second cell, that is, for each cell included in the second cell, When the second cell is regarded as a cell, the operation mode of the second cell is operated, then at least one cell may also include cells whose access is all prohibited during the cell reselection process.

Or, if the timer uses the first timer implementation described in S57, and there is a first timer or a second timer for a cell, then the timer in S59 is the first timer or the second timer The timer can be considered for one cell. For example, in the previous steps, S54 is executed, and S59 is the first timer, and the second cell is as described above, then the at least one cell may include the first timer described in S59. Corresponding second cell, or S54 is executed in the previous step, and the second timer in S59 is for the second cell as described above (or described as being for the second cell and the second cell The same frequency cell), then the at least one cell may include the same frequency cell of the second cell corresponding to the second timer described in S59, or include the same frequency of the second cell and the second cell Cells, in this case, for example, the second cell specifically includes N cells, the embodiment of the present application may perform the same operation on each cell included in the second cell, that is, for each cell included in the second cell, All operations are performed according to the operation mode of the second cell when the second cell is regarded as a cell, and then at least one cell may also include all cells whose access is prohibited during the cell reselection process. Or, it may be that when the highest ranked cell changes and the first condition is met, the terminal device may release the access prohibition restriction on all the cells whose access is prohibited during the cell reselection process, then here is, When the highest-ranking cell changes and the first timer or the second timer expires, the terminal device can release the access prohibition restriction on all cells that are prohibited from access during the cell reselection process, that is, The at least one cell may include all cells whose access is prohibited during the cell reselection process, and the second cell at this time may be a cell, for example, may be any one of the cell reselection processes. Cells that are forbidden to access.

Or, if the timer adopts the second timer implementation described in S57, and there is a first timer or a second timer for a cell, the first timer or the second timer in S59 may It is considered that it is for all cells whose access is prohibited during the cell reselection process before the terminal device accesses the first cell, and the at least one cell may include one cell or multiple cells. For example, if S54 is executed in the previous step, then if S59 is the first timer, then the at least one cell includes the second cell, and because cell reselection is a cyclically executed process, if the terminal device accesses the first During the cell reselection process before a cell, the terminal device is also prohibited from accessing other cells, then the at least one cell may also include these cells, for example, the verification result of the terminal device for the third cell is "barred", then The at least one cell further includes the same frequency cell of the third cell, or the same frequency cell including the third cell and the third cell, or, if it is the second timer in S59, the at least one cell includes the second The same frequency cell of the cell, or the same frequency cell including the second cell and the second cell. Since cell reselection is a cyclically executed process, if the terminal device is also prohibited from accessing other cells during the cell reselection process before the terminal device accesses the first cell, the at least one cell may also include these cells. For example, if the verification result of the third cell by the terminal device is "barred", the at least one cell further includes the same-frequency cell of the third cell, or the same-frequency cell including the third cell and the third cell. In this case, for example, the second cell specifically includes N cells, the embodiment of the present application may perform the same operation on each cell included in the second cell, that is, for each cell included in the second cell, When the second cell is regarded as a cell, the operation mode of the second cell is operated, then at least one cell may also include cells whose access is all prohibited during the cell reselection process.

Or, if the timer adopts the second timer implementation described in S57, and there is a first timer or a second timer for a cell, the first timer or the second timer in S59 may It is considered to be for a type of cell whose terminal equipment is forbidden to access during the cell reselection process before accessing the first cell. The at least one cell may include one cell or multiple cells. For example, if S54 is performed in the previous step, then if S59 includes the first timer, then the at least one cell includes the second cell, and because cell reselection is a cyclically performed process, if the terminal device accesses the first During the cell reselection process before a cell, the terminal device is also prohibited from accessing other cells, and the MIB parameters intraFreqReselection read by the terminal device when verifying these cells are both “allowed”, then the at least A cell may also include these cells; or for example, S59 includes a second timer, then the at least one cell includes the second cell and the same frequency cell of the second cell, or includes the same frequency cell of the second cell, and because Cell reselection is a cyclically executed process. If the terminal device is also prohibited from accessing other cells during the cell reselection process before the terminal device accesses the first cell, and the terminal device reads when checking these cells The parameters intraFreqReselection in the MIB are "not allowed", then the at least one cell may also include these cells and these cells Intra-frequency cells, including intra-frequency cells or these cells. Wherein, S59 may include a first timer and / or a second timer. In this case, for example, the second cell specifically includes N cells, the embodiment of the present application may perform the same operation on each cell included in the second cell, that is, for each cell included in the second cell, When the second cell is regarded as a cell, the operation mode of the second cell is operated, then at least one cell may also include cells whose access is all prohibited during the cell reselection process.

It can be seen that if the access is prohibited to the second cell and the same-frequency cell of the second cell, the terminal device may choose to lift the access prohibition restriction on the same frequency cell of the second cell and the second cell, or may also Only choose to lift the barred access restriction on the same frequency cell of the second cell.

When the same-frequency reselection is not allowed, for example, the access to the second cell and the same-frequency cell of the second cell is prohibited, that is, the terminal device is also prohibited from accessing the second cell at the same time. All other cells at the frequency where the second cell is located, that is, all other cells at the frequency where the second cell is located are implicated. At this time, regardless of whether the current system information of other cells on the same frequency indicates that other cells are Access is prohibited, and the terminal device cannot consider these cells during cell reselection, which greatly reduces the selectable range of the terminal device when performing cell reselection. In this regard, the embodiments of the present application can lift the access prohibition restriction on the involved cell as soon as possible, and try to avoid the terminal device from remarkably reducing the number of candidate cells when performing cell reselection, thereby facilitating the terminal device to reselect to the best signal strength Of the community. In addition, in the embodiment of the present application, when co-frequency reselection is not allowed, it may also choose not to remove the barred access restriction on the original highest-ranking cell (for example, just remove the barred access restriction on the co-frequency cell of the second cell, Without lifting the access prohibition restriction on the second cell), to avoid unnecessary power consumption caused by the terminal device re-considering the original highest-ranking cell in subsequent cell reselection.

In the embodiment of the present application, when the terminal device performs cell reselection again in the first cell, if the highest ranked cell changes, then a timer must also be considered. If the timer expires, the previously blocked second The cell is used again as a candidate cell, and if the timer has not expired, the second cell that was previously prohibited from accessing will not be used as a candidate cell. In practical applications, a cell's access-prohibited state may continue for a long period of time. By controlling the timing of the timer, the terminal equipment can reduce The number of times the cell performs verification, thereby reducing the invalid power consumption of the terminal device, and also making the terminal device more effective in verifying the cell.

In the embodiment shown in FIG. 5, the power consumption of the terminal device can be reduced by setting a timer. In addition, consider another problem: if the terminal device's verification result of a cell does not allow co-frequency reselection, for example, the terminal device verifies the second cell, the verification result is that the terminal device is prohibited from accessing the second cell The same frequency cell as the second cell, that is, when access to the second cell is prohibited, access to all other cells at the frequency of the second cell is prohibited, that is, other cells at the frequency of the second cell All cells are implicated. At this time, regardless of whether the current system information of other cells on the same frequency indicates that other cells are prohibited from accessing the terminal device, the terminal device cannot consider these cells in the cell reselection, so that the terminal device is performing cell re-evaluation. The selectable range of time selection is greatly reduced. In order to solve this problem, a cell reselection method is provided below. The following method helps to increase the selectable range of the terminal device when performing cell reselection.

The embodiment of the present application provides a second cell reselection method, please refer to FIG. 6, which is a flowchart of the method. This method can be applied to the scenario shown in FIG. 2 or FIG. 3 or FIG. 4. In the following introduction process, the method provided in the embodiment of the present application is applied to the application scenario shown in FIG. 2 or FIG. 3 or FIG. 4 as example. In addition, the method may be performed by two communication devices, such as a third communication device and a fourth communication device, where the third communication device may be a network device or a network device capable of supporting the functions required by the method The communication device or the third communication device may be a terminal device or a communication device capable of supporting the functions required by the method by the terminal device, and of course, may be other communication devices, such as a chip system. The same is true for the fourth communication device. The fourth communication device may be a network device or a communication device capable of supporting the functions required by the method by the network device, or the fourth communication device may be a terminal device or a device capable of supporting the terminal device to implement the method Of course, the communication device with the required function can also be other communication devices, such as a chip system. Moreover, there are no restrictions on the implementation manners of the third communication device and the fourth communication device, for example, the third communication device may be a network device, the fourth communication device is a terminal device, or the third communication device and the fourth communication device are both networks The device, or the third communication device and the fourth communication device are both terminal devices, or the third communication device is a network device, and the fourth communication device is a communication device capable of supporting the functions required by the method by the terminal device, and so on. The network device is, for example, a base station.

For ease of introduction, in the following, the method is performed by a network device and a terminal device as an example, that is, the third communication device is a terminal device and the fourth communication device is a network device as an example. If the method provided in the embodiment of the present application is applied to the application scenario shown in FIG. 2, the network device described below may be the first network device, the second network device, or the third network device in FIG. 2. The method provided in the embodiment of the application is applied to the application scenario shown in FIG. 3, and the network device described below may be the fourth network device, the fifth network device, the sixth network device, or the seventh network device in FIG. 3. When the method provided by the embodiment of the present application is applied to the application scenario shown in FIG. 5, the network device described below may be the eighth network device, the ninth network device, or the tenth network device in FIG.

S61. In the process of cell reselection, the terminal device determines the highest ranked cell according to the cell reselection criteria.

S62. The terminal device performs bar check on the second cell. If the result of the bar check is "not barred", S63 is executed, or if the result of the bar check is "barred", S64 is executed.

S63. If the result of the bar check is that the second cell is "not barred", the terminal device reselects to access the second cell. Continue to S68.

With regard to S61-S63, reference may be made to the introduction of S51-S53 in the embodiment shown in FIG. 5, and no more details will be given.

S64. If the result of the bar check is that the second cell is "barred", the second cell is prohibited from accessing. Next, S65 is executed.

If the result of the bar check is that the second cell is "barred", indicating that the second cell prohibits access to the terminal device, the terminal device does not add the second cell to the candidate cell of the terminal device, that is, the terminal device The cell is excluded from the candidate cell of the terminal device, or the terminal device removes the second cell from the candidate cell of the terminal device, for example, deletes the information of the second cell from the candidate list for cell reselection. Specifically, if the check result is "barred", it indicates that the second cell is prohibited from accessing the terminal device. If the terminal device does not read the MIB and SIB1 of the second cell, the terminal device determines that the terminal device is barred When accessing the second cell, the terminal device excludes the second cell from the candidate cell of the terminal device; and if the terminal device reads the MIB and SIB1 of the highest ranked cell, and if the parameter intraFreqReselection in the read MIB is "Allowed", the terminal device determines that the terminal device prohibits access to the second cell, and the terminal device excludes the second cell from the candidate cell of the terminal device, and if the parameter intraFreqReselection in the read MIB is "not allowed", Then, the terminal device determines that the terminal device prohibits access to the second cell and the same-frequency cell of the second cell, and the terminal device excludes the second cell and the same-frequency cell of the second cell from the candidate cells of the terminal device.

S65. The terminal device determines the highest ranked cell from the remaining cells included in the candidate list for cell reselection according to the cell reselection criteria.

The so-called remaining cells are the cells that meet the S criteria except for the cells forbidden to access in S64. For example, the cell forbidden to access in S64 is the second cell, then the remaining cells are candidates for cell reselection In the list, other than the second cell, other cells that meet the S criterion, or the cell whose access is forbidden in S64 is the second cell and the same-frequency cell of the second cell, then the remaining cells are excluded from the candidate list for cell reselection. The second cell and other cells other than the same-frequency cell of the second cell satisfy the S criterion.

It can be understood that, according to the R criterion, the terminal device determines the highest ranked cell from the candidate cells included in the candidate list for cell reselection that meet the S criterion except for the cells that are prohibited from access. For example, according to the R criterion, the terminal device sorts the candidate cells included in the candidate list of the cell reselection that meet the S criterion except for the cells that are prohibited from access, for example, the terminal device sorts the cells from high to low according to the signal quality of the cell The order of the cells in the candidate list included in the cell reselection candidate list satisfies the S criterion and other candidate cells except for the cells that are prohibited from access, so that the highest ranked cell can be determined. For example, the highest ranked cell determined by the terminal device is the third cell.

S66. The terminal device performs bar check on the third cell.

S67. If the result of the bar check is that the third cell is "not barred", the terminal device reselects to access the third cell. Continue to S68.

As an optional method, before reselecting to access the third cell, the terminal device may also determine whether the third cell meets the S criterion. If the S criterion is met, the terminal device reselects to access the third cell, otherwise the terminal device may not Reselect the access to the third cell, but continue the cell reselection process.

Of course, the result of the bar check may also be that the third cell is "barred". If the result of the bar check is that the third cell is "barred", the terminal device does not add the third cell to the candidate cell of the terminal device, that is, The third cell is excluded from the candidate cells of the terminal device, and the cell reselection process can be continued. For this specific process, reference may be made to S64. If the result of the bar check is that the second cell is "barred", the processing method of the terminal device. This can be understood as a cyclic execution process. If the cell checked by the terminal device is always bar, the terminal device will cyclically execute the process of selecting the cell and performing bar check on the cell until the terminal device reselects to a cell .

S68. After accessing the first cell through cell reselection, the terminal device determines the highest ranked cell according to the cell reselection criteria.

Where, if S61, S62, S63, and S68 are performed, then the first cell here is the second cell described above, or, if S61, S62, S64, S65, S66, S67, and S68 are performed, then The first cell here is the third cell mentioned above.

After reselecting to access the first cell, the terminal device may continue to perform the cell reselection process to reselect to a better cell. For example, the terminal device may determine the highest ranked cell from among the cells that satisfy the S criterion except for at least one cell among the candidate cells included in the candidate list of the cell reselection according to the cell reselection criterion, for example, the terminal device according to the R criterion , Determine the highest ranked cell from among the candidate cells included in the candidate list of cell reselection other than at least one cell that meet the S criterion, or satisfy the S among the candidate cells included in the candidate list of cell reselection The cells are sorted according to the criteria. For example, according to the R criterion, the terminal device sorts the candidate cells included in the candidate list for cell reselection other than at least one cell that meet the S criterion. For example, the terminal device sorts the cells according to the signal quality from high to Sort in a lower order, so that the highest ranked cell can be determined. The at least one cell here includes a cell whose access is prohibited during the cell reselection process before the terminal device accesses the first cell. For example, the at least one cell may include a second cell and / or a co-frequency cell of the second cell. For example, if S61, S62, S64, S65, S66, S67, and S68 are performed, at least one cell here includes the second cell, or includes the second cell and the same-frequency cell of the second cell.

In the embodiment of the present application, the terminal device determines the highest-ranked cell according to the cell reselection criteria. In addition to the scenario where the terminal device reselects to access the first cell, it can also occur in other scenarios. For example, there is another case, that is, S68 may also be that, when no suitable cell is found in the cell reselection process, the terminal device determines the highest ranked cell according to the cell reselection criteria. This situation can be understood as that if the terminal device does not select a suitable cell during the cell reselection process, the terminal device may not camp on any cell, but enters the "select any cell (any cell selection)" state. Or, the terminal device may also enter the state of “camping on any cell”. When the terminal device does not select a suitable cell in the cell reselection process, the terminal device may also sort the candidate cells according to the cell reselection criteria to determine the highest ranked cell. Among them, FIG. 6 only takes the case where the terminal device accesses the first cell through cell reselection as an example.

S69. When the highest ranked cell changes and the first condition is met, the terminal device releases the access prohibition restriction on at least one cell.

At least one cell, for example, includes all cells whose access is prohibited during the cell reselection process before the terminal device reselects to access the first cell, that is, when the highest ranked cell changes and the first condition is met, the terminal The device may release the access prohibition restriction on all cells whose access is prohibited during the cell reselection process. This does not limit what the first condition is. The at least one cell may include a second cell and / or a co-frequency cell of the second cell.

For example, the second cell may be a cell, or may specifically be N cells, that is, the second cell is a general term for N cells, and N is a positive integer. In the introduction process of this article, the second cell is mainly taken as an example. Then, if the second cell is specifically N cells, it can be considered that the N cells are all cells that are prohibited during the cell reselection process before the terminal device reselects to access the first cell. In this case, each cell included in the second cell can be processed according to the solution provided in the embodiment of the present application, that is, the embodiment shown in FIG. 6 treats the second cell as a cell At this time, the processing method for the second cell can be used for processing each cell in the N cells. Then, when the highest ranked cell changes and the first condition is met, the terminal device lifts the access prohibition restriction on at least one cell, which can be considered to be the removal of the cell before the terminal device reselects access to the first cell Forbidden access restriction for all prohibited cells in the reselection process.

In this embodiment, the first condition includes, for example, that in the cell reselection process before the terminal device accesses the first cell, the result of performing an access restriction check on the second cell is the second cell and the second Access to the same frequency cell of the cell is prohibited. In addition, in this embodiment, at least one cell may include the second cell and the same-frequency cell of the second cell, or include the same-frequency cell of the second cell but not the second cell. In this case, for example, the second cell specifically includes N cells, the embodiment of the present application may perform the same operation on each cell included in the second cell, that is, for each cell included in the second cell, When the second cell is regarded as a cell, the operation mode of the second cell is operated, then at least one cell may also include cells whose access is all prohibited during the cell reselection process. Or it may be that when the highest ranking cell changes and the first condition is met, the terminal device may release the access prohibition restriction on all cells that are prohibited from access during the cell reselection process, that is, When the highest-ranking cell changes and satisfies the cell reselection process before the terminal device accesses the first cell, the result of performing an access restriction check on the second cell is that the second cell and the second cell have the same When a frequency cell is forbidden to access, the terminal device may release the access barring restriction on all cells whose access is forbidden during the cell reselection process, that is, the at least one cell may be included in the cell All cells whose access is prohibited during the reselection process, and the second cell at this time may be a cell, for example, may be any cell whose access is prohibited during the cell reselection process.

For example, if the second cell is understood as a cell, then the second cell may be the first cell that is prohibited from access during the cell reselection process before the terminal device accesses the first cell, or the terminal device is accessing Before the first cell, any cell whose access is forbidden during the cell reselection process.

When the same-frequency reselection is not allowed, for example, the access to the second cell and the same-frequency cell of the second cell is prohibited, that is, the access to the second cell is also prohibited while accessing the second cell All other cells at the frequency point, that is, all other cells at the frequency point of the second cell are implicated, regardless of whether the current system information of other cells on the same frequency indicates that other cells are prohibited from accessing the terminal device The terminal device cannot consider these cells during cell reselection, which greatly reduces the selectable range of the terminal device when performing cell reselection. In this regard, the embodiments of the present application can remove the prohibited access restriction on the involved cells as soon as possible, and try to avoid the terminal device from significantly reducing the number of candidate cells when performing cell reselection, thereby facilitating the terminal device to reselect to the signal strength as much as possible Good neighborhood. In addition, in this embodiment of the present application, when co-frequency reselection is not allowed, it may also choose not to remove the barred access restriction on the original highest-ranked cell (for example, only to remove the barred access restriction on the co-frequency cell of the second cell) , Without lifting the access prohibition restriction on the second cell), to avoid unnecessary power consumption caused by the terminal device re-considering the original highest-ranking cell in subsequent cell reselection.

The embodiment shown in FIG. 5 helps reduce the power consumption of the terminal device, and the embodiment shown in FIG. 6 can expand the range of candidate cells of the terminal device. How to reduce the power consumption of the terminal device is always a problem that needs to be considered at present, so next, considering the power consumption of the terminal device, another problem needs to be considered: for some cells, a certain or Some terminal devices access, and if the terminal device has been included in the candidate cell for verification, it is also unnecessary power consumption for the terminal device. Therefore, the embodiment of the present application provides a third cell reselection method to reduce the power consumption of the terminal device.

The embodiment of the present application provides a third cell reselection method, please refer to FIG. 7A or FIG. 7B, which is a flowchart of the method. This method can be applied to the scenario shown in FIG. 2 or FIG. 3 or FIG. 4. In the following introduction process, the method provided in the embodiment of the present application is applied to the application scenario shown in FIG. 2 or FIG. 3 or FIG. 4 as example. In addition, the method may be performed by two communication devices, such as a fifth communication device and a sixth communication device, where the fifth communication device may be a network device or a network device capable of supporting the functions required by the method The communication device or the fifth communication device may be a terminal device or a communication device capable of supporting the functions required by the method by the terminal device, and of course may be other communication devices, such as a chip system. The same is true for the sixth communication device. The sixth communication device may be a network device or a communication device capable of supporting the network device to implement the functions required by the method, or the sixth communication device may be a terminal device or a device capable of supporting the terminal device to implement the method. Of course, the communication device with the required function can also be other communication devices, such as a chip system. And there is no restriction on the implementation manner of the fifth communication device and the sixth communication device, for example, the fifth communication device may be a network device, the sixth communication device is a terminal device, or the fifth communication device and the sixth communication device are both networks The device, or the fifth communication device and the sixth communication device are both terminal devices, or the fifth communication device is a network device, and the sixth communication device is a communication device capable of supporting the functions required by the method by the terminal device, and so on. The network device is, for example, a base station.

For ease of introduction, in the following, the method is performed by a network device and a terminal device as an example, that is, the fifth communication device is a terminal device and the sixth communication device is a network device as an example. If the method provided in the embodiment of the present application is applied to the application scenario shown in FIG. 2, the network device described below may be the first network device, the second network device, or the third network device in FIG. 2. The method provided in the embodiment of the application is applied to the application scenario shown in FIG. 3, and the network device described below may be the fourth network device, the fifth network device, the sixth network device, or the seventh network device in FIG. 3. When the method provided by the embodiment of the present application is applied to the application scenario shown in FIG. 5, the network device described below may be the eighth network device, the ninth network device, or the tenth network device in FIG.

S71. In the process of cell reselection, the terminal device determines the highest ranked cell according to the cell reselection criteria.

S72. The terminal device performs bar check on the second cell. If the result of the bar check is "not barred", S73 is executed, or, if the result of the bar check is "barred", S74A or S74B is executed.

S73. If the result of the bar check is that the second cell is "not barred", the terminal device reselects to access the second cell. Continue to S78.

With regard to S71-S73, reference may be made to the introduction of S51-S53 in the embodiment shown in FIG. 5, and no more details will be given.

S74A or S74B. If the result of the bar check is that the second cell is "barred", the second cell is prohibited from accessing. Next, S75 is executed.

If the result of the bar check is that the second cell is "barred", indicating that the second cell prohibits access to the terminal device, the terminal device does not add the second cell to the candidate cell of the terminal device. The cell is excluded from the candidate cell of the terminal device, or the terminal device removes the second cell from the candidate cell of the terminal device, for example, deletes the information of the second cell from the candidate list for cell reselection. Specifically, if the check result is "barred", it indicates that the second cell is prohibited from accessing the terminal device. If the terminal device does not read the MIB and SIB1 of the second cell, or if the terminal device reads MIB and SIB1 of the second cell, and the parameter intraFreqReselection in the read MIB is "allowed", the terminal device determines that the terminal device is prohibited from accessing the second cell, and the terminal device excludes the second cell from the candidate cell of the terminal device, Moreover, if the terminal device has performed a bar check on the second cell before this cell reselection process, and the result of the last bar check on the second cell is that the terminal device cannot access the second cell (or Cannot access the second cell and the co-frequency cell of the second cell), the terminal device has already started the timer corresponding to the second cell, then if the timer does not expire, the terminal device fails the reselection corresponding to the second cell Add 1 to the number of times, or if the terminal device has already performed a bar check on the second cell before this cell reselection, and the result of the last bar check on the second cell If the terminal device can access the second cell, the terminal device clears the number of reselection failures corresponding to the second cell (where, if the number of reselection failures corresponding to the second cell is already 0, the terminal device can perform the reset The operation may also just perform the operation of determining that the number of reselection failures of the second cell is 0, and if the number of reselection failures corresponding to the second cell is greater than 0, the terminal device may perform a clearing operation), optional, The terminal device restarts the timer for the second cell, or alternatively, if the terminal device did not perform a bar check on the second cell in the current cell reselection process, then the result of this bar check is that the terminal device is prohibited When accessing the second cell, the terminal device may add 1 to the number of reselection failures corresponding to the second cell. At this time, it can be understood that the number of reselection failures corresponding to the second cell is 0 itself. If the number of reselection failures is increased by 1, the number of reselection failures corresponding to the second cell becomes 1. Optionally, the terminal device starts a timer for the second cell. In other words, the timer is an optional feature, and the timer may or may not be set. S74A in FIG. 7A is an example in which the terminal device has performed a bar check on the second cell before this cell reselection process.

Or, if the check result is "barred", it indicates that the second cell is forbidden to access to the terminal device. If the terminal device reads the MIB and SIB1 of the second cell, and the parameter in the read MIB intraFreqReselection "Not allowed", the terminal device determines that the terminal device prohibits access to the second cell and the same-frequency cell of the second cell, then the terminal device excludes the second cell and the same-frequency cell of the second cell from the candidate cells of the terminal device And, if the terminal device has performed a bar check on the second cell before this cell reselection process, and the result of the last bar check on the second cell is that the terminal device cannot access the second cell ( Or cannot access the second cell and the same-frequency cell of the second cell), the terminal device increases the number of reselection failures corresponding to the second cell by 1, or if the result of the last bar check of the second cell is the terminal device If the second cell can be accessed, the terminal device clears the number of reselection failures corresponding to the second cell (where, if the number of reselection failures corresponding to the second cell is already 0, the terminal device can The operation of performing the clearing may also be an operation of determining that the number of reselection failures of the second cell is 0, and if the number of reselection failures corresponding to the second cell is greater than 0, the terminal device may perform the operation of clearing). Alternatively, the terminal device restarts the timer for the second cell. Or, if the terminal device did not perform a bar check on the second cell in the current cell reselection process, then the result of this bar check is If the terminal device prohibits access to the second cell, the terminal device may add 1 to the number of reselection failures corresponding to the second cell. At this time, it can be understood that the number of reselection failures corresponding to the second cell is 0 itself, and the terminal device If the number of reselection failures corresponding to the cell is increased by 1, the number of reselection failures corresponding to the second cell becomes 1. Optionally, the terminal device starts a timer for the second cell. Among them, a cell is barred when it participates in the cell reselection for the first time after it is released from restriction, and it is barred when the access restriction check is performed. This is regarded as a reselection failure. In other words, the timer is an optional feature, and the timer may or may not be set. Among them, S74A in FIG. 7A describes this situation, and takes a timer as an example.

In the foregoing manner, the number of reselection failures corresponding to the second cell records the number of times the terminal device is continuously barred from access by the second cell, and as another embodiment, the number of reselection failures may also be considered to be discontinuous. . S74B in FIG. 7B describes this situation.

For example, if the check result is "barred", it indicates that the second cell is forbidden to access to the terminal device. If the terminal device does not read the MIB and SIB1 of the second cell, or if the terminal device reads the first MIB and SIB1 of the second cell, and the parameter intraFreqReselection in the read MIB is "allowed", the terminal device determines that the terminal device is prohibited from accessing the second cell, and the terminal device excludes the second cell from the candidate cell of the terminal device, and If the terminal device has performed a bar check on the second cell before this cell reselection process, and the terminal device has started a timer and the timer has not expired, the terminal device will reset the corresponding cell Add 1 to the number of failed selections, or if the terminal device did not perform a bar check on the second cell during the current cell reselection process, that is, the timer corresponding to the second cell has not been started, considering the current bar check The result is that the terminal device prohibits access to the second cell, the terminal device can start a timer corresponding to the second cell, and the terminal device can Increase the number of failures by 1. At this time, it can be understood that the number of reselection failures corresponding to the second cell is 0 itself, and the terminal device increases the number of reselection failures corresponding to the second cell by 1, and the number of reselection failures corresponding to the second cell Is 1, and the terminal device starts a timer for the second cell.

Or, if the check result is "barred", it indicates that the second cell is forbidden to access to the terminal device. If the terminal device reads the MIB and SIB1 of the second cell, and the parameter in the read MIB intraFreqReselection "Not allowed", the terminal device determines that the terminal device prohibits access to the second cell and the same-frequency cell of the second cell, then the terminal device excludes the second cell and the same-frequency cell of the second cell from the candidate cells of the terminal device And, if the terminal device has performed a bar check on the second cell before this cell reselection, the terminal device has started the timer and the timer has not expired, then the terminal device will correspond to the second cell The number of reselection failures is increased by 1, or if the terminal device did not perform a bar check on the second cell before this cell reselection process, that is, the timer corresponding to the second cell has not been started, considering this bar The result of the verification is that the terminal device prohibits access to the second cell, the terminal device can start a timer corresponding to the second cell, and the terminal device can The number of reselection failures is increased by 1, at this time, it can be understood that the number of reselection failures corresponding to the second cell is 0 itself, and the terminal device increases the number of reselection failures corresponding to the second cell by 1, then the reselection corresponding to the second cell fails The number of times becomes 1, and the terminal device starts a timer for the second cell.

Moreover, in the current cell reselection process, if the timer corresponding to the second cell has not expired, if the subsequent terminal device performs bar check on the second cell again, and the check result is barred, the terminal The device may continue to increase the number of reselection failures corresponding to the second cell by 1.

For example, regarding the timer, the terminal device may obtain the timer duration of the timer from the network device. For example, the network device sends first information to the terminal device, and the first information is used to indicate the timing duration of the timer, and then the terminal device can determine the timing duration of the timer after receiving the first information from the network device. The first information is, for example, system information of the second cell, or may be other information. For example, the network device may determine the timing duration of the timer, and indicate the timing duration of the timer to the terminal device through the system information of the second cell. Or the terminal device may also obtain the timing duration of the timer through other methods, without specific limitation. For example, the network device may set the timing duration of the timer according to the system information update period of the cell, for example, the timer timing duration may be set to be greater than or equal to the system information update period of the cell, or the network device may also set the related system according to the bar of the cell The update time of the information sets the timing duration of the timer, etc., so that the removal of the barred access restriction for the cell can be adapted to the update period of the system information of the cell, or to the update time of the relevant system information of the bar of the cell , Thereby reducing unnecessary cell reselection operations of the terminal device, and correspondingly reducing the power consumption of the terminal device.

S75. The terminal device determines the highest ranked cell from the remaining cells included in the candidate list for cell reselection according to the cell reselection criteria.

The so-called remaining cells are the cells that meet the S criteria except for the cells whose access is prohibited in S74A or S74B in the candidate list for cell reselection. For example, the cell whose access is prohibited in S74A or S74B is the second cell , Then the remaining cells are the cells that meet the S criterion except the second cell in the candidate list for cell reselection, or the cells whose access is forbidden in S74A or S74B are the same frequency cells of the second cell and the second cell, Then, the remaining cells are other cells that satisfy the S criterion except for the second cell and the same-frequency cell of the second cell in the candidate list for cell reselection.

S76. The terminal device performs bar check on the third cell.

S77. If the result of the bar check is that the third cell is "not barred", the terminal device reselects to access the third cell. Continue to S78.

For example, the result of the bar check is that the third cell is "not barred", indicating that the terminal device is allowed to access the third cell, and then the terminal device can be reselected into the third cell.

Of course, the result of the bar check may also be that the third cell is "barred". If the result of the bar check is that the third cell is "barred", the terminal device does not add the third cell to the candidate cell of the terminal device, that is, The third cell is excluded from the candidate cells of the terminal device, and the cell reselection process can be continued. For this specific process, refer to S74A or S74B. If the result of the bar check is that the second cell is "barred", the processing method of the terminal device. This can be understood as a cyclic execution process. If the cell checked by the terminal device is always bar, the terminal device will cyclically execute the process of selecting the cell and performing the bar on the cell until the terminal device reselects to a cell. In the embodiment of the present application, the terminal device may set a corresponding counter and timer for each cell forbidden to access, so as to make a judgment for each cell forbidden to access. The durations of the timers corresponding to different cells may be equal or unequal. For example, terminal devices can be obtained from network devices, and there is no specific limitation.

S78. After accessing the first cell through cell reselection, determine the highest ranked cell according to the cell reselection criteria.

Where, if S71, S72, S73, and S78 are performed, then the first cell here is the second cell described above, or, if S71, S72, S74A, or S74B, S75, S76, S77, and S78 are performed , Then the first cell here is the third cell mentioned above.

After reselecting to access the first cell, the terminal device may continue to perform the cell reselection process to reselect to a better cell. For example, the terminal device may determine the highest ranked cell from among the cells that satisfy the S criterion except for at least one cell among the candidate cells included in the candidate list of the cell reselection according to the cell reselection criterion, for example, the terminal device according to the R criterion , Determine the highest ranked cell from among the cells that satisfy the S criterion except for at least one cell among the candidate cells included in the candidate list for cell reselection. For example, according to the R criterion, the terminal device sorts the candidate cells included in the candidate list for cell reselection other than at least one cell that meet the S criterion. For example, the terminal device sorts the cells according to the signal quality from high to Sort in a low order, so that the highest sorted cell can be determined, or the terminal device can not sort, but directly select from the candidate cells included in the cell reselection candidate list other than at least one cell that meets the S criterion Determine the cell with the best signal quality. The at least one cell here includes a cell whose access is prohibited during the cell reselection process before the terminal device accesses the first cell. For example, the at least one cell may include a second cell and / or a co-frequency cell of the second cell. For example, if S71, S72, S74A or S74B, S75, S76, S77, and S78 are performed, then at least one cell here includes the second cell, or includes the second cell and the same frequency cell of the second cell.

In the embodiment of the present application, the terminal device determines the highest-ranking cell according to the cell reselection criteria. In addition to the scenario where the terminal device reselects to access the first cell, it can also occur in other scenarios. For example, there is another case, that is, S78 may also be that, when no suitable cell is found in the cell reselection process, the terminal device determines the highest ranked cell according to the cell reselection criteria. This situation can be understood as that if the terminal device does not select a suitable cell during the cell reselection process, the terminal device may not camp on any cell, but enters the "select any cell (any cell selection)" state. Or, the terminal device may also enter the state of “camping on any cell”. When the terminal device does not select a suitable cell in the cell reselection process, the terminal device may also sort the candidate cells according to the cell reselection criteria to determine the highest ranked cell. 7A and 7B only take the case where the terminal device accesses the first cell through cell reselection as an example.

S79A or S79B. When the highest-ranking cell changes and the first condition is satisfied, the access barring restriction on at least one cell is lifted.

The at least one cell may include a second cell and / or a co-frequency cell of the second cell.

For example, the second cell may be a cell, or may specifically be N cells, that is, the second cell is a general term for N cells, and N is a positive integer. In the introduction process of this article, the second cell is mainly taken as an example. Then, if the second cell is specifically N cells, it can be considered that the N cells are all cells that are prohibited during the cell reselection process before the terminal device reselects to access the first cell. In this case, each cell included in the second cell can be processed according to the solution provided in the embodiment of the present application, that is, each cell in the N cells can be processed as described above. The second cell is processed as described above. Then, when the highest ranked cell changes and the first condition is met, the terminal device lifts the access prohibition restriction on at least one cell, which may be that the cell before the terminal device reselects access to the first cell is released. Prohibited access restrictions for all cells that are prohibited during the selection process. This does not limit what the first condition is.

In this embodiment, the first type of first condition includes, for example, that the timer expires and the number of reselection failures of the second cell is less than or equal to the threshold. Under the first condition of the first type, the number of reselection failures of the second cell is the number of times the terminal device is continuously barred from access by the second cell within the timing duration of the timer. In addition, in this embodiment, at least one cell may include a second cell, or a co-frequency cell including the second cell and the second cell. In this case, for example, the second cell specifically includes N cells, the embodiment of the present application may perform the same operation on each cell included in the second cell, that is, for each cell included in the second cell, When the second cell is regarded as a cell, the operation mode of the second cell is operated, then at least one cell may also include cells whose access is all prohibited during the cell reselection process. Or it may be that when the highest ranking cell changes and the first condition is met, the terminal device may release the access prohibition restriction on all cells whose access is prohibited during the cell reselection process, that is, when When the highest-ranking cell changes and the timer expires, and the number of reselection failures of the second cell is less than or equal to the threshold, the terminal device may release all cells that are prohibited from access during the cell reselection process Access barring, that is, at least one cell may include all cells whose access is forbidden during the cell reselection process, and the second cell at this time may be a cell, for example, the cell Any cell that is forbidden to access during the reselection process.

Under the first condition of the first type, the number of reselection failures corresponding to the second cell records the number of times the terminal device is continuously barred from access by the second cell within the timing duration of the timer (if there is no continuity in the middle, then The number of failed reselections will be cleared.) Then, when the timer expires, if the number of reselection failures of the second cell is greater than the threshold, the access prohibition restriction on the second cell is not lifted, that is, the second cell is excluded from the candidate cells of the terminal device, The second cell is not a candidate cell of the terminal device. It can be understood that if a cell is continuously bard more than the threshold value under the existing bar release mechanism, it indicates that the existing bar release mechanism may not be applicable to the cell, and the terminal device connects to such a cell Input limit verification will cause unnecessary power consumption of the terminal device. Therefore, in the embodiments of the present application, the bar limit of the cell is no longer lifted according to the existing mechanism, but whether the access barring restriction of the cell is lifted is determined by setting the number of reselection failures, if the reselection of a cell fails If the number is too many, the access prohibition restriction of the cell is not lifted, thereby reducing unnecessary power consumption of the terminal device.

Alternatively, the second first condition includes that the number of reselection failures of the second cell is less than or equal to the threshold value. Under the second first condition, the number of reselection failures of the second cell is the number of times the terminal device is continuously barred from access by the second cell. In addition, in this embodiment, at least one cell may include a second cell, or a co-frequency cell including the second cell and the second cell. In this case, for example, the second cell specifically includes N cells, the embodiment of the present application may perform the same operation on each cell included in the second cell, that is, for each cell included in the second cell, When the second cell is regarded as a cell, the operation mode of the second cell is operated, then at least one cell may also include cells whose access is all prohibited during the cell reselection process. Or it may be that when the highest ranking cell changes and the first condition is met, the terminal device may release the access prohibition restriction on all cells whose access is prohibited during the cell reselection process, that is, when When the highest ranked cell changes, and the number of reselection failures of the second cell is less than or equal to the threshold value, the terminal device may release the access prohibition restriction on all cells whose access is prohibited during the cell reselection process, That is, at least one cell may include all cells whose access is prohibited during the cell reselection process, and the second cell at this time may be a cell, for example, may be any one of the cell reselection processes. Cells that are forbidden to access.

Under the second first condition, the number of reselection failures corresponding to the second cell records the number of times the terminal device is continuously barred from access by the second cell (if there is no continuity in the middle, the number of reselection failures will be cleared zero). Then, if the number of reselection failures of the second cell is greater than the threshold, the terminal device does not remove the access barring restriction on the second cell, that is, the second cell is excluded from the candidate cell of the terminal device, and the second cell does not As a candidate cell for terminal equipment. It can be understood that if a cell is continuously bard more than the threshold value under the existing bar release mechanism, it indicates that the existing bar release mechanism may not be applicable to the cell, and the terminal device connects to such a cell Input limit verification will cause unnecessary power consumption of the terminal device. Therefore, in the embodiments of the present application, the bar limit of the cell is no longer lifted according to the existing mechanism, but whether the access barring restriction of the cell is lifted is determined by setting the number of reselection failures, if the reselection of a cell fails If the number is too many, the access prohibition restriction of the cell is not lifted, thereby reducing unnecessary power consumption of the terminal device.

Among them, S79A in FIG. 7A describes the first type of the first condition and the second type of the first condition. Of course, the first type of the first condition and the second type of the first condition are parallel.

Alternatively, the third first condition includes that the timer expires and the number of reselection failures of the second cell is less than or equal to the threshold. The number of reselection failures of the second cell is the number of times that the terminal device is prohibited from being accessed by the second cell within the timing duration of the timer. In addition, in this embodiment, at least one cell may include a second cell, or a co-frequency cell including the second cell and the second cell. In this case, for example, the second cell specifically includes N cells, the embodiment of the present application may perform the same operation on each cell included in the second cell, that is, for each cell included in the second cell, When the second cell is regarded as a cell, the operation mode of the second cell is operated, then at least one cell may also include cells whose access is all prohibited during the cell reselection process. Or it may be that when the highest ranking cell changes and the first condition is met, the terminal device may release the access prohibition restriction on all cells whose access is prohibited during the cell reselection process, that is, when When the highest-ranking cell changes and the timer expires, and the number of reselection failures of the second cell is less than or equal to the threshold, the terminal device may release all cells that are prohibited from access during the cell reselection process Access barring, that is, at least one cell may include all cells whose access is forbidden during the cell reselection process, and the second cell at this time may be a cell, for example, the cell Any cell that is forbidden to access during the reselection process.

Under the third first condition, the number of reselection failures corresponding to the second cell records the number of times the terminal device is prohibited from being accessed by the second cell within the timer duration of the timer. Within the timer duration of the timer, the terminal The device may be continuously prohibited from being accessed by the second cell, or the event that the terminal device is prohibited from being accessed by the second cell may not occur continuously. There is no restriction on this under the third first condition. Then, when the timer expires, if the number of reselection failures of the second cell is greater than the threshold, the access prohibition restriction on the second cell is not lifted, that is, the second cell is excluded from the candidate cells of the terminal device, The second cell is not a candidate cell of the terminal device. It can be understood that if a cell is barned more than a threshold within a period of time under the existing bar release mechanism, it indicates that the existing bar release mechanism may not be applicable to the cell. Cell access restriction verification will cause unnecessary power consumption of the terminal equipment. Therefore, in the embodiments of the present application, the bar limit of the cell is no longer lifted according to the existing mechanism, but whether the access barring restriction of the cell is lifted is determined by setting the number of reselection failures, if the reselection of a cell fails If the number is too many, the access prohibition restriction of the cell is not lifted, thereby reducing unnecessary power consumption of the terminal device.

Among them, S79B in FIG. 7B describes the third first condition.

The embodiments of the present application introduce various first conditions. Which one of the first conditions the terminal device chooses may be pre-defined through a protocol, or configured by the network device through signaling to the terminal device, or may be pre-configured in the terminal device. No specific restrictions.

The apparatus for implementing the above method in the embodiments of the present application is described below with reference to the drawings. Therefore, the above contents can be used in subsequent embodiments, and the repeated contents will not be repeated.

FIG. 8 is a schematic block diagram of a communication device 800 provided by an embodiment of the present application. The communication device 800 includes:

The first determining module 810 is used to determine that the second cell is forbidden to access during the cell reselection process;

The second determining module 820 is configured to determine the highest ranked cell according to the cell reselection criteria;

The releasing module 830 is configured to release the barred access restriction on at least one cell when the highest ranked cell changes and the first condition is met, the at least one cell is forbidden during the cell reselection process The accessed cell, the at least one cell includes the second cell and / or a co-frequency cell of the second cell.

As an optional implementation manner, the second determining module 820 is configured to determine the highest ranked cell according to the cell reselection criterion by: after accessing the first cell through cell reselection, determining the cell according to the cell reselection criterion The highest ranked cell; or, when no suitable cell is found during the cell reselection, determine the highest ranked cell according to the cell reselection criteria.

As an optional implementation manner, the highest ranking cell is the first cell or the second cell or other cells except the first cell and the second cell.

As an optional implementation manner, that the second cell is prohibited from accessing refers to excluding the second cell from the candidate list for cell reselection.

As an optional implementation manner, the second cell is specifically N cells, and the release module 830 is configured to release the at least one cell when the highest ranked cell changes and the first condition is met in the following manner: Prohibited access restriction: When the highest ranked cell changes and the first condition is met, the access prohibition restriction on the N cells is released, and the N cells are in the process of reselection of the cell All cells that are forbidden to access.

As an optional implementation manner, the second cell is a cell, and the release module 830 is configured to release the prohibition of access to at least one cell when the highest ranked cell changes and the first condition is met in the following manner Entry restriction: When the highest-ranking cell changes and the first condition is met, the access restriction on all cells whose access is prohibited during the cell reselection is released.

As an optional implementation manner, the first condition is that the timer times out.

As an optional implementation manner, the first determining module 810 is used to determine that the second cell is prohibited from access during the cell reselection process in the following manner:

As an optional implementation manner, the first determining module 810 is configured to determine that the result of the access restriction check is that the second cell is prohibited from accessing and start the timer by:

As an optional implementation manner, if the second cell is the first cell to be barred from access during the cell reselection process, the release module 830 is used to determine the highest ranking in the following manner When the cell changes and the timer times out, the access barring restriction on at least one cell is lifted: when the highest ranked cell changes and the first timer or the second timer times out, the pair is released. In the process of cell reselection, all access-restricted cells are restricted from access.

As an optional implementation manner, the second cell is any cell whose access is forbidden during the cell reselection process, then,

The releasing module 830 is configured to release the access restriction of at least one cell when the highest ranked cell changes and the timer expires in the following manner: when the highest ranked cell changes and the first timer When it times out, remove the access prohibition restriction on the second cell; or,

The releasing module 830 is configured to release the access barring restriction on at least one cell when the highest ranked cell changes and the timer expires by: when the highest ranked cell changes and the second timer When it times out, release the access prohibition restriction on the second cell and the same-frequency cell of the second cell, or release the access prohibition restriction on the same-frequency cell of the second cell.

As an optional implementation manner, the communication device 800 further includes a transceiver module 840, which is also shown in FIG. 8. The transceiver module 840 is used to receive a first message from a network device, where the first message is used to indicate the duration of the timer.

As an optional implementation manner, the first condition is that during the cell reselection process, the result of performing an access restriction check on the second cell is the second cell and the second cell Access to the same frequency cell is prohibited.

As an optional implementation manner, the first condition is that the timer times out, and the number of reselection failures of the second cell is less than or equal to a threshold; the at least one cell includes the second cell, or Including the second cell and the same-frequency cell of the second cell, and the number of reselection failures of the second cell is that the communication device 800 is continuously prohibited by the second cell within the timing duration of the timer The number of accesses or the number of reselection failures of the second cell is the number of times the communication device 800 is prohibited from being accessed by the second cell within the timing duration of the timer.

As an optional implementation manner, the first determining module 810 is used to determine that the second cell is prohibited from access during the cell reselection process as follows:

During the cell reselection, an access restriction check is performed on the second cell, and the access restriction check is used to check whether a communication device can access the second cell;

The number of reselection failures of the second cell is the number of times the communication device 800 is continuously prohibited from being accessed by the second cell within the timing duration of the timer, then, when the result of the access restriction check When the second cell is forbidden to access, and the result of the last access restriction check of the second cell is that the second cell is forbidden to access, and the timer has not expired, the The number of reselection failures is increased by 1, or when the result of the access restriction check is that the second cell is barred from access, and the result of the last access restriction check of the second cell is the first When the second cell is not prohibited from accessing, clear the number of reselection failures and start or restart the timer; or, the number of reselection failures of the second cell is the communication device 800 at the timing The number of times access by the second cell is prohibited within the timer duration of the device, then when the result of the access restriction check is that the second cell is prohibited from access and the timer has not timed out, The number of reselection failures is increased by 1, or when the result of the access restriction check The second cell is prohibited access, the timer is started, and the number of failed reselection plus 1.

As an optional implementation manner, the first condition is that the number of reselection failures of the second cell is less than or equal to a threshold, and the at least one cell includes the second cell, or includes the second In the cell of the same frequency as the cell and the second cell, the number of reselection failures of the second cell is the number of times the communication device 800 is continuously prohibited from being accessed by the second cell.

As an optional implementation manner, the first determining module is used to determine that the second cell is forbidden to access during the cell reselection process as follows:

As an optional implementation manner, the communication device 800 is, for example, a terminal device.

It should be understood that the first determination module 810, the second determination module 820, and the release module 830 in the embodiments of the present application may be implemented by a processor or a processor-related circuit component, and the transceiver module 840 may be implemented by a transceiver or a transceiver-related circuit component . The transceiver is, for example, a radio frequency transceiver component in the communication device 800.

As shown in FIG. 9, an embodiment of the present application further provides a communication device 900. The communication device 900 includes a processor 910 and a memory 920. Optionally, the communication device 900 further includes a transceiver 930, where the memory 920 stores Instruction or program, the processor 910 is used to execute the instruction or program stored in the memory 920. When the instruction or program stored in the memory 920 is executed, the processor 910 is used to perform the operations performed by the first determination module 810, the second determination module 820, and the release module 830 in the foregoing embodiment, and the transceiver 930 is used to perform the foregoing implementation In this example, the operations performed by the transceiver module 840. E.g:

The memory 920 is used to store instructions;

The processor 910 is configured to determine that the second cell is forbidden to access during the cell reselection process, determine the highest ranked cell according to the cell reselection criterion, and when the highest ranked cell changes and the first condition is satisfied , Lifting the barred access restriction on at least one cell, which is a barred cell during the cell reselection process, and the at least one cell includes the second cell and / or all The same frequency cell as the second cell.

As an optional implementation manner, the processor 910 is configured to determine the highest ranked cell according to a cell reselection criterion by: after accessing the first cell after cell reselection, determining the highest cell according to the cell reselection criterion Rank cells; or, when no suitable cell is found during the cell reselection process, determine the highest ranked cell according to the cell reselection criteria.

As an optional implementation manner, the second cell is specifically N cells, and the processor 910 is configured to release at least one cell when the highest ranked cell changes and the first condition is met in the following manner: Prohibited access restriction: When the highest ranked cell changes and the first condition is met, the access prohibition restriction on the N cells is released, and the N cells are in the process of reselection of the cell All cells that are forbidden to access.

As an optional implementation manner, the second cell is a cell, and the processor 910 is configured to release the prohibition of access to at least one cell when the highest ranked cell changes and the first condition is met in the following manner: Entry restriction: When the highest-ranking cell changes and the first condition is met, the access restriction on all cells whose access is prohibited during the cell reselection is released.

As an optional implementation manner, the processor 910 is configured to determine that the second cell is forbidden to access during the cell reselection process in the following manner:

As an optional implementation manner, the processor 910 is configured to determine that the result of the access restriction check is that the second cell is prohibited from accessing and start the timer by:

As an optional implementation manner, if the second cell is the first cell to be barred from access in the cell reselection process, the processor 910 is used to determine the highest ranking in the following manner When the cell changes and the timer times out, the access barring restriction on at least one cell is lifted: when the highest ranked cell changes and the first timer or the second timer times out, the pair is released. In the process of cell reselection, all access-restricted cells are restricted from access.

The processor 910 is configured to release the barred access restriction on at least one cell when the highest-ranking cell changes and the timer expires in the following manner: when the highest-ranking cell changes and the first timer When it times out, remove the access prohibition restriction on the second cell; or,

The processor 910 is configured to release the barred access restriction on at least one cell when the highest-ranking cell changes and the timer expires in the following manner: when the highest-ranking cell changes and the second timer When it times out, release the access prohibition restriction on the second cell and the same-frequency cell of the second cell, or release the access prohibition restriction on the same-frequency cell of the second cell.

As an optional implementation, the communication device 900 further includes a transceiver 930, which is also shown in FIG. 9. The transceiver 930 is used to receive a first message from a network device, where the first message is used to indicate the duration of the timer.

As an optional implementation manner, the first condition is that the timer times out, and the number of reselection failures of the second cell is less than or equal to a threshold; the at least one cell includes the second cell, or Including the second cell and the same frequency cell of the second cell, the number of reselection failures of the second cell is that the communication device 900 is continuously prohibited by the second cell within the timing duration of the timer The number of accesses, or the number of reselection failures of the second cell is the number of times the communication device 900 is prohibited from being accessed by the second cell within the timing duration of the timer.

As an optional implementation manner, the processor 910 is configured to determine that the second cell is forbidden to access during the cell reselection process as follows:

The number of reselection failures of the second cell is the number of times the communication device 900 is continuously prohibited from being accessed by the second cell within the timing duration of the timer, then, when the result of the access restriction check When the second cell is forbidden to access, and the result of the last access restriction check of the second cell is that the second cell is forbidden to access, and the timer has not expired, the The number of reselection failures is increased by 1, or when the result of the access restriction check is that the second cell is barred from access, and the result of the last access restriction check of the second cell is the first When the second cell is not prohibited from accessing, clear the number of reselection failures and start or restart the timer; or, the number of reselection failures of the second cell is the communication device 900 at the timing The number of times access by the second cell is prohibited within the timer duration of the device, then when the result of the access restriction check is that the second cell is prohibited from access and the timer has not timed out, The number of reselection failures is increased by 1, or when the result of the access restriction check The second cell is prohibited access, the timer is started, and the number of failed reselection plus 1.

As an optional implementation manner, the first condition is that the number of reselection failures of the second cell is less than or equal to a threshold, and the at least one cell includes the second cell, or includes the second For the cell of the same frequency as the cell and the second cell, the number of reselection failures of the second cell is the number of times the communication device 900 is continuously prohibited from being accessed by the second cell.

As an optional implementation manner, the communication device 900 is, for example, a terminal device.

It should be understood that the communication device 800 or the communication device 900 according to an embodiment of the present application may correspond to the terminal device in the embodiment shown in FIG. 5, the terminal device in the embodiment shown in FIG. 6, or the device shown in FIG. 7A or 7B. The terminal device in the illustrated embodiment, and the operations and / or functions of the respective modules in the communication device 800 or the communication device 900 are to implement the embodiment shown in FIG. 5, the embodiment shown in FIG. 6, or FIG. 7A or The corresponding flow in the embodiment shown in FIG. 7B. For example, the first determination module 810, the second determination module 820, the release module 830, or the processor 910 may be used to execute S51-S59 in the embodiment shown in FIG. 5, and / or used to support the technology described herein In other processes, the transceiving module 840 or the transceiver 930 may be used to perform all the transceiving steps of the terminal device in the embodiment shown in FIG. 5, for example, the step of receiving the first message from the network device in the embodiment shown in FIG. 5, and / Or other processes for supporting the technology described herein; or, the first determination module 810, the second determination module 820, and the release module 830, or the processor 910 may be used to perform S61 ~ in the embodiment shown in FIG. S69, and / or other processes for supporting the technology described herein, the transceiving module 840 or the transceiver 930 may be used to perform all the transceiving steps of the terminal device in the embodiment shown in FIG. 6, and / or to support this document Other processes of the described technology; or, the first determination module 810, the second determination module 820, and the release module 830 or the processor 910 may be used to execute S71-S79A in the embodiment shown in FIG. 7A, and / or Yu Zhi In other processes of the technology described herein, the transceiving module 840 or the transceiver 930 may be used to perform all the transceiving steps of the terminal device in the embodiment shown in FIG. 7A. For example, in the embodiment shown in FIG. The steps of a message, and / or other processes for supporting the technology described herein; or, the first determination module 810, the second determination module 820, and the release module 830, or the processor 910 may be used to perform the process shown in FIG. 7B S71 to S79B in the embodiment, and / or other processes for supporting the technology described herein, the transceiver module 840 or the transceiver 930 may be used to perform all the transceiver steps of the terminal device in the embodiment shown in FIG. 7B, for example The step of receiving the first message from the network device in the embodiment shown in FIG. 7B, and / or other processes for supporting the technology described herein. Wherein, all relevant content of each step involved in the above method embodiments can be referred to the function description of the corresponding function module, which will not be repeated here.

An embodiment of the present application further provides a communication device. The communication device may be a terminal device, or a circuit, or a chip. The communication device may be used to perform the actions performed by the terminal device in the method embodiment shown in FIG. 5, the method embodiment shown in FIG. 6, or the method embodiment shown in FIG. 7A or FIG. 7B.

When the communication device is a terminal device, FIG. 10 shows a simplified structural diagram of the terminal device. It is easy to understand and convenient to illustrate. In FIG. 10, the terminal device uses a mobile phone as an example. As shown in FIG. 10, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and input and output devices. The processor is mainly used for processing communication protocols and communication data, as well as controlling terminal devices, executing software programs, and processing software program data. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal. The antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive user input data and output data to the user. It should be noted that some types of terminal devices may not have input / output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit processes the baseband signal after radio frequency processing, and then sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data. For ease of explanation, only one memory and processor are shown in FIG. 10. In actual terminal equipment products, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium, storage device, or the like. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiments of the present application.

In the embodiments of the present application, an antenna and a radio frequency circuit with a transceiver function can be regarded as a transceiver unit of a terminal device, and a processor with a processing function can be regarded as a processing unit of the terminal device. As shown in FIG. 10, the terminal device includes a transceiver unit 1010 and a processing unit 1020. The transceiver unit may also be called a transceiver, a transceiver, a transceiver device, or the like. The processing unit may also be called a processor, a processing board, a processing module, a processing device, and the like. Optionally, the device used to implement the receiving function in the transceiver unit 1010 can be regarded as a receiving unit, and the device used to implement the sending function in the transceiver unit 1010 can be regarded as a sending unit, that is, the transceiver unit 1010 includes a receiving unit and a sending unit. The transceiver unit may sometimes be called a transceiver, a transceiver, or a transceiver circuit. The receiving unit may sometimes be called a receiver, a receiver, or a receiving circuit. The sending unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit.

It should be understood that the transceiver unit 1010 is used to perform the above-described method embodiment shown in FIG. 5, the method embodiment shown in FIG. 6, or the method embodiment shown in FIG. 7A or FIG. 7B. The processing unit 1020 is used to perform the operations other than the transceiver operation on the terminal device in the method embodiment shown in FIG. 5, the method embodiment shown in FIG. 6, or the method embodiment shown in FIG. 7A or FIG. 7B .

For example, in one implementation, the transceiving unit 1010 is used to perform all the transceiving steps of the terminal device in the embodiment shown in FIG. 5, for example, the step of receiving the first message from the network device in the embodiment shown in FIG. , The processing unit 1020 is used to execute S51 to S59 in the embodiment shown in FIG. 5, and / or the processing unit 1020 is also used to execute other processing steps on the terminal device side other than the transceiving operation in the embodiment of the present application; Or, in one implementation, the transceiver unit 1010 is used to perform all the transceiver steps of the terminal device in the embodiment shown in FIG. 6, and the processing unit 1020 is used to perform S61 to S69 in the embodiment shown in FIG. , And / or the processing unit 1020 is also used to perform other processing steps other than the transceiving operation on the terminal device side in the embodiments of the present application; or, in one implementation, the transceiving unit 1010 is used to perform the process shown in FIG. 7A All the sending and receiving steps of the terminal device in the embodiment, such as the step of receiving the first message from the network device in the embodiment shown in FIG. 7A, the processing unit 1020 is used to execute the embodiment shown in FIG. 7A S71 to S79A, and / or the processing unit 1020 is also used to perform other processing steps other than the transceiving operation on the terminal device side in the embodiment of the present application; or, in an implementation manner, the transceiving unit 1010 is used to execute FIG. 7B All the sending and receiving steps of the terminal device in the embodiment shown, for example, the step of receiving the first message from the network device in the embodiment shown in FIG. 7B, the processing unit 1020 is configured to execute the steps in the embodiment shown in FIG. 7B S71 to S79B, and / or the processing unit 1020 is also used to execute other processing steps other than the transceiving operation on the terminal device side in the embodiment of the present application.

When the communication device is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit may be an input-output circuit and a communication interface; the processing unit is a processor or microprocessor or integrated circuit integrated on the chip.

When the communication device in the embodiment of the present application is a terminal device, reference may be made to the device shown in FIG. 11. As an example, the device can perform functions similar to the processor 910 in FIG. 9. In FIG. 11, the device includes a processor 1110, a transmission data processor 1120, and a reception data processor 1130. The first determination module 810, the second determination module 820, and the release module 830 in the foregoing embodiment may be implemented by the processor 1110 in FIG. 11 and complete corresponding functions. The transceiver module 840 in the foregoing embodiment may be implemented by the sending data processor 1120 and / or the receiving data processor 1130 in FIG. 11.

Although a channel encoder and a channel decoder are shown in FIG. 11, it can be understood that these modules do not constitute a restrictive description of this embodiment, but are only schematic.

FIG. 12 shows another form of this embodiment. The communication device 1200 includes modules such as a modulation subsystem, a central processing subsystem, and peripheral subsystems. The communication device in this embodiment can serve as a modulation subsystem therein. Specifically, the modulation subsystem may include a processor 1203 and an interface 1204. The processor 1203 performs the function of the processing module 810, and the interface 1204 performs the function of the transceiver module 840. As another variation, the modulation subsystem includes a memory 1206, a processor 1203, and a program stored on the memory 1206 and executable on the processor. When the processor 1203 executes the program, the method shown in FIG. 5 is implemented. Examples, the method embodiment shown in FIG. 6, the method embodiment shown in FIG. 7A, or the method on the terminal device side in the method embodiment shown in FIG. 7B. It should be noted that the memory 1206 may be non-volatile or volatile, and its location may be located inside the modulation subsystem or the processing device 1200, as long as the memory 1206 can be connected to the processor 1203 is enough.

An embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, a process related to the terminal device in the embodiment shown in FIG. 5 provided by the foregoing method embodiment can be implemented.

An embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, a process related to a terminal device in the embodiment shown in FIG. 6 provided by the foregoing method embodiment can be implemented .

An embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, a process related to a terminal device in the embodiment shown in FIG. 7A provided by the foregoing method embodiment can be implemented.

An embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, a process related to a terminal device in the embodiment shown in FIG. 7B provided by the foregoing method embodiment can be implemented .

As another form of an embodiment of the present application, a computer program product containing instructions is provided, and when the instructions are executed, the method on the terminal device side in the method embodiment shown in FIG. 5 described above is executed.

An embodiment of the present application further provides a computer program product containing instructions, which execute the method on the terminal device side in the method embodiment shown in FIG. 6 when the instructions are executed.

An embodiment of the present application further provides a computer program product containing an instruction, which executes the method on the terminal device side in the method embodiment shown in FIG. 7A when the instruction is executed.

An embodiment of the present application further provides a computer program product containing an instruction, which executes the method on the terminal device side in the method embodiment shown in FIG. 7B when the instruction is executed.

An embodiment of the present application further provides a computer program product containing instructions, which execute the method on the terminal device side in the method embodiment shown in FIG. 5 when the instructions are executed.

It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), and may also be other general-purpose processors, digital signal processors (DSPs), and special-purpose integrated circuits (DSPs) application, specific, integrated circuit (ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electronically Erasable programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be a random access memory (random access memory, RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous RAM), SDRAM), double data rate synchronous dynamic random access memory (double data SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) ) And direct memory bus random access memory (direct RAMbus RAM, DR RAM).

It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, the memory (storage module) is integrated in the processor.

It should be noted that the memories described herein are intended to include, but are not limited to these and any other suitable types of memories.

It should be understood that in various embodiments of the present application, the size of the sequence numbers of the above processes does not mean that the execution order is sequential, and the execution order of each process should be determined by its function and inherent logic, and should not correspond to the embodiments of the present application The implementation process constitutes no limitation.

Those of ordinary skill in the art may realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application of the technical solution and design constraints. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that for the convenience and conciseness of the description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a division of logical functions. In actual implementation, there may be other divisions, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product, the computer software product is stored in a storage medium, including Several instructions are used to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program codes .

The above are only specific implementations of the present application, but the scope of protection of the embodiments of the present application is not limited to this, and any person skilled in the art can easily think of within the technical scope disclosed in the embodiments of the present application Changes or replacements should be covered within the scope of protection of this application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.

Claims

A cell reselection method is characterized by including:

In the process of cell reselection, it is determined that the second cell is forbidden to access;

Determine the highest ranked cell according to the cell reselection criteria;

When the highest-ranked cell changes and the first condition is met, the access barring restriction on at least one cell is lifted. The at least one cell is a cell barred from access during the cell reselection process. The at least one cell includes the second cell and / or a co-frequency cell of the second cell.
The method according to claim 1, wherein determining the highest ranked cell according to a cell reselection criterion includes:

After accessing the first cell through cell reselection, determine the highest ranked cell according to the cell reselection criteria; or,

When no suitable cell is found during the cell reselection, the highest ranked cell is determined according to the cell reselection criterion.
The method according to claim 1 or 2, wherein the highest ranked cell is the first cell or the second cell or other cells except the first cell and the second cell.
The method according to any one of claims 1 to 3, wherein the second cell is prohibited from accessing means to exclude the second cell from a candidate list for cell reselection.
The method according to any one of claims 1 to 4, wherein the second cells are specifically N cells, and when the highest ranked cell changes and the first condition is satisfied, the at least one cell is released Access restrictions, including:

When the highest-ranked cell changes and the first condition is met, the access prohibition restriction on the N cells is lifted, and the N cells are all prohibited from being accessed during the cell reselection process. Enter the community.
The method according to any one of claims 1 to 5, wherein the first condition is that the timer times out.
The method according to claim 6, characterized in that, in the process of cell reselection, determining that the second cell is prohibited from accessing includes:

During the cell reselection process, perform an access restriction check on the second cell, where the access restriction check is used to check whether a terminal device can access the second cell;

It is determined that the result of the access restriction check is that the second cell is prohibited from accessing, and the timer is started, wherein the second cell is the first to be prohibited from accessing during the cell reselection process The incoming cell, or the second cell is any cell whose access is forbidden during the cell reselection process.
The method according to claim 7, wherein determining that the result of the access restriction check is that the second cell is prohibited from accessing, and starting the timer includes:

Determine that the result of the access restriction check is that the second cell is prohibited from accessing, and start a first timer; or,

The result of determining the access restriction check is that the second cell and the same-frequency cell of the second cell are prohibited from accessing, and a second timer is started.
The method according to claim 8, wherein if the second cell is the first cell to be denied access during the cell reselection process, when the highest ranked cell changes, When the timer expires, the access prohibition restriction on at least one cell is lifted, including:

When the highest-ranked cell changes and the first timer or the second timer times out, the access barring restriction on all cells whose access is barred during the cell reselection process is released.
The method according to claim 8, wherein the second cell is any cell whose access is forbidden during the cell reselection process, then,

When the highest-ranking cell changes and the timer expires, releasing the access barring restriction on at least one cell includes: when the highest-ranking cell changes and the first timer times out, canceling the registration The access prohibition of the second cell; or,

When the highest-ranking cell changes and the timer expires, releasing the access barring restriction on at least one cell includes: when the highest-ranking cell changes and the second timer times out, canceling the registration Prohibiting access restriction of the second cell and the same-frequency cell of the second cell, or lifting prohibited access restriction of the same-frequency cell of the second cell.
The method according to any one of claims 1 to 5, wherein the first condition is that during a cell reselection process, the result of performing an access restriction check on the second cell is the The second cell and the co-frequency cell of the second cell are barred from access.
The method according to any one of claims 1 to 5, wherein the first condition is that a timer expires, and the number of reselection failures of the second cell is less than or equal to a threshold; the at least one The cell includes the second cell, or a co-frequency cell including the second cell and the second cell, and the number of reselection failures of the second cell is the terminal device within the timing duration of the timer The number of times that access is continuously prohibited by the second cell, or the number of reselection failures of the second cell is the number of times the terminal device is prohibited from being accessed by the second cell within the timing duration of the timer.
The method according to claim 12, characterized in that, in the process of cell reselection, determining that the second cell is prohibited from accessing includes:

During the cell reselection process, perform an access restriction check on the second cell, where the access restriction check is used to check whether a terminal device can access the second cell;

The number of reselection failures of the second cell is the number of times the terminal device is continuously prohibited from being accessed by the second cell within the timing duration of the timer, then, when the result of the access restriction check is When the second cell is forbidden to access, and the result of the last access restriction check of the second cell is that the second cell is forbidden to access, and the timer is not timed out, the Increase the number of failed selections by 1, or when the result of the access restriction check is that the second cell is barred from access, and the result of the last access restriction check of the second cell is the second When the cell is not prohibited from accessing, clear the number of reselection failures and start or restart the timer; or, the number of reselection failures of the second cell is the The number of times access by the second cell is prohibited within the time duration, then, when the result of the access restriction check is that the second cell is prohibited from access and the timer has not expired, the Increase the number of failed reselections by 1, or when the result of the access restriction check is The second cell is prohibited access, the timer is started, and the reselection failure count is incremented.
The method according to any one of claims 1 to 5, wherein the first condition is that the number of reselection failures of the second cell is less than or equal to a threshold, and the at least one cell includes the first A second cell, or a co-frequency cell including the second cell and the second cell, and the number of reselection failures of the second cell is the number of times the terminal device is continuously prohibited from being accessed by the second cell.
The method according to claim 14, characterized in that, during the cell reselection process, determining that the second cell is prohibited from accessing includes:

When the result of the access restriction check is that the second cell is forbidden to access, and the result of the last access restriction check of the second cell is that the second cell is forbidden to access, it will The number of reselection failures is increased by 1, or, when the result of the access restriction check is that the second cell is prohibited from access, and the result of the last time the second cell was checked by the access restriction is When the access of the second cell is not prohibited, reset the number of reselection failures to zero.
A communication device is characterized by comprising a processor and a memory coupled to each other, wherein,

The memory is used to store instructions:

The processor is configured to execute the instruction, during the cell reselection process, determine that the second cell is forbidden to access, determine the highest ranked cell according to the cell reselection criteria, and, when the highest ranked cell changes, And when the first condition is met, the access barring restriction on at least one cell is lifted, the at least one cell is a cell barred from access during the cell reselection process, and the at least one cell includes the A second cell and / or a co-frequency cell of the second cell.
The communication device according to claim 16, wherein the processor is configured to determine the highest ranked cell according to the cell reselection criterion in the following manner:

After accessing the first cell through cell reselection, determine the highest ranked cell according to the cell reselection criteria; or,

When no suitable cell is found during the cell reselection, the highest ranked cell is determined according to the cell reselection criterion.
The communication device according to claim 16 or 17, wherein the highest ranked cell is the first cell or the second cell or other cells except the first cell and the second cell .
The communication device according to any one of claims 16 to 18, wherein the access prohibition of the second cell refers to excluding the second cell from a candidate list for cell reselection.
The communication device according to any one of claims 16 to 19, wherein the second cell is specifically N cells, and the processor is used when the highest ranked cell changes and meets the When a condition is met, the access restriction on at least one cell is lifted:

When the highest-ranked cell changes and the first condition is met, the access prohibition restriction on the N cells is lifted, and the N cells are all prohibited from being accessed during the cell reselection process. Enter the community.
The communication device according to any one of claims 16 to 20, wherein the first condition is a timer timeout.
The communication device according to claim 21, wherein the processor is configured to determine that the second cell is forbidden to access during the cell reselection process as follows:

During the cell reselection process, perform an access restriction check on the second cell, where the access restriction check is used to check whether the communication device can access the second cell;

It is determined that the result of the access restriction check is that the second cell is prohibited from accessing, and the timer is started, wherein the second cell is the first to be prohibited from accessing during the cell reselection process The incoming cell, or the second cell is any cell whose access is forbidden during the cell reselection process.
The communication device according to claim 22, wherein the processor is configured to determine that the result of the access restriction check is that the second cell is prohibited from accessing and start the timer by:

Determine that the result of the access restriction check is that the second cell is prohibited from accessing, and start a first timer; or,

The result of determining the access restriction check is that the second cell and the same-frequency cell of the second cell are prohibited from accessing, and a second timer is started.
The communication device according to claim 23, characterized in that if the second cell is the first cell forbidden to access during the cell reselection, the processor is used to: When the highest ranked cell changes and the timer expires, the access barring restriction on at least one cell is lifted:

When the highest-ranked cell changes and the first timer or the second timer times out, the access barring restriction on all cells whose access is barred during the cell reselection process is released.
The communication device according to claim 23, wherein the second cell is any cell whose access is forbidden during the cell reselection, then,

The processor is used to release the access barring restriction on at least one cell when the highest-ranking cell changes and the timer expires in the following manner: when the highest-ranking cell changes and the first timer When it times out, remove the access prohibition restriction on the second cell; or,

The processor is configured to release the access prohibition restriction on at least one cell when the highest-ranking cell changes and the timer expires in the following manner: when the highest-ranking cell changes and the second timer When it times out, release the access prohibition restriction on the second cell and the same-frequency cell of the second cell, or release the access prohibition restriction on the same-frequency cell of the second cell.
The communication device according to any one of claims 16 to 20, wherein the first condition is that the result of performing an access restriction check on the second cell during the cell reselection process is The second cell and the co-frequency cell of the second cell are barred from access.
The communication device according to any one of claims 16 to 20, wherein the first condition is that the timer expires, and the number of reselection failures of the second cell is less than or equal to a threshold; the at least One cell includes the second cell, or a co-frequency cell including the second cell and the second cell, and the number of reselection failures of the second cell is the duration of the communication device at the timing of the timer The number of times that the second cell is continuously barred from access, or the number of reselection failures of the second cell is the number of times the communication device is barred from access by the second cell within the timing duration of the timer .
The communication device according to claim 27, wherein the processor is configured to determine that the second cell is forbidden to access during the cell reselection process as follows:

During the cell reselection process, perform an access restriction check on the second cell, where the access restriction check is used to check whether the communication device can access the second cell;

The number of reselection failures of the second cell is the number of times the communication device is continuously prohibited from being accessed by the second cell within the timing duration of the timer, then, when the result of the access restriction check is When the second cell is forbidden to access, and the result of the last access restriction check of the second cell is that the second cell is forbidden to access, and the timer is not timed out, the Increase the number of failed selections by 1, or when the result of the access restriction check is that the second cell is barred from access, and the result of the last access restriction check of the second cell is the second When the cell is not prohibited from accessing, reset the number of reselection failures to zero and start or restart the timer; or, the number of reselection failures of the second cell is that of the communication device in the timer The number of times access by the second cell is prohibited within the time duration, then, when the result of the access restriction check is that the second cell is prohibited from access and the timer has not expired, the Increase the number of failed reselections by 1, or when the result of the access restriction check is The second cell is prohibited access, the timer is started, and the reselection failure count is incremented.
The communication device according to any one of claims 16 to 20, wherein the first condition is that the number of reselection failures of the second cell is less than or equal to a threshold, and the at least one cell includes the A second cell, or a co-frequency cell including the second cell and the second cell, and the number of reselection failures of the second cell is the number of times the communication device is continuously barred from access by the second cell.
The communication device according to claim 29, wherein the processor is configured to determine that the second cell is forbidden to access during the cell reselection process as follows:

When the result of the access restriction check is that the second cell is forbidden to access, and the result of the last access restriction check of the second cell is that the second cell is forbidden to access, it will The number of reselection failures is increased by 1, or, when the result of the access restriction check is that the second cell is prohibited from access, and the result of the last time the second cell was checked by the access restriction is When the access of the second cell is not prohibited, reset the number of reselection failures to zero.
A computer-readable storage medium on which a computer program is stored, characterized in that, when the program is executed by a processor, the method according to any one of claims 1 to 15 is implemented.
A communication device characterized by executing the method according to any one of claims 1 to 15.
A communication system, characterized by comprising the communication device according to any one of claims 16 to 30.