CN113727400B

CN113727400B - Cell preferred method, device, terminal and storage medium

Info

Publication number: CN113727400B
Application number: CN202111027005.XA
Authority: CN
Inventors: 司广磊
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-09-02
Filing date: 2021-09-02
Publication date: 2024-08-27
Anticipated expiration: 2041-09-02
Also published as: CN113727400A; WO2023030219A1

Abstract

The embodiment of the application discloses a cell preferred method, a cell preferred device, a cell preferred terminal and a cell preferred storage medium, and belongs to the technical field of communication. The method comprises the following steps: determining an abnormal cell, wherein the abnormal cell is obtained based on the cell abnormal occurrence times, and the cell abnormal occurrence times comprise at least one of radio link failure times and auxiliary cell failure times; and performing cell preference based on the abnormal cell, wherein the cell preference comprises at least one of cell selection preference, cell reselection preference and cell switching preference. By adopting the scheme provided by the embodiment of the application, the abnormal cells which frequently generate radio link failure or auxiliary cell failure are excluded from the preferred range, so that the situation that the terminal cannot acquire normal service due to the selection of the abnormal cells, the reselection of the abnormal cells and the switching of the abnormal cells is avoided, the quality of service acquired by the terminal is improved, and the increase of the power consumption of the terminal due to the frequent radio link failure or auxiliary cell failure is avoided.

Description

Cell preferred method, device, terminal and storage medium

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a cell preferred method, a device, a terminal and a storage medium.

Background

Cell preference is the process by which a terminal selects a cell that provides high quality of service, typically occurring during cell selection, cell reselection, and cell handover phases.

In the related art, a terminal performs cell measurement based on measurement configuration issued by a network device, so as to determine a cell to be camped, a cell to be reselected or a cell to be switched from a plurality of cells based on measurement results.

Disclosure of Invention

The embodiment of the application provides a cell preferred method, a cell preferred device, a terminal and a storage medium. The technical scheme is as follows:

in one aspect, an embodiment of the present application provides a cell preference method, where the method includes:

determining an abnormal cell, wherein the abnormal cell is obtained based on the cell abnormal occurrence times, and the cell abnormal occurrence times comprise at least one of radio link failure times and auxiliary cell failure times;

And performing cell preference based on the abnormal cell, wherein the cell preference comprises at least one of cell selection preference, cell reselection preference and cell switching preference.

In another aspect, an embodiment of the present application provides a cell preference apparatus, where the apparatus includes:

the determining module is used for determining an abnormal cell, wherein the abnormal cell is obtained based on the determination of the occurrence times of cell abnormality, and the occurrence times of cell abnormality comprise at least one of the failure times of a radio link and the failure times of a secondary cell;

and the preferential module is used for carrying out cell preferential based on the abnormal cells, wherein the cell preferential comprises at least one of cell selection preferential, cell reselection preferential and cell switching preferential.

In another aspect, an embodiment of the present application provides a terminal, where the terminal includes a processor and a memory; the memory stores at least one instruction for execution by the processor to implement the cell preference method as described in the above aspect.

In another aspect, embodiments of the present application provide a computer-readable storage medium storing at least one instruction for execution by a processor to implement a cell preference method as described in the above aspects.

In another aspect, there is also provided a computer program product comprising at least one instruction loaded and executed by a processor to implement a cell preference method as described in the above aspect.

In the embodiment of the application, before cell preference is carried out, firstly, the abnormal cell is determined based on the occurrence times of the abnormal cell, then the cell preference is carried out based on the determined abnormal cell, the abnormal cell with frequent radio link failure or auxiliary cell failure is excluded from the preferred range, the phenomenon that the terminal cannot acquire normal service due to the selection of the abnormal cell, the reselection of the abnormal cell and the switching to the abnormal cell is avoided, the quality of service acquired by the terminal is improved, and the increase of the power consumption of the terminal due to the frequent radio link failure or the auxiliary cell failure is avoided.

Drawings

FIG. 1 illustrates a block diagram of a communication system provided by an exemplary embodiment of the present application;

fig. 2 is a block diagram showing a structure of a terminal according to an exemplary embodiment of the present application;

fig. 3 is a flow chart illustrating a cell preference method according to an exemplary embodiment of the present application;

Fig. 4 is a flowchart of a cell preference method according to another exemplary embodiment of the present application;

fig. 5 is a flowchart illustrating an abnormal cell determination procedure according to an exemplary embodiment of the present application;

fig. 6 is a flow chart illustrating a cell selection process according to an exemplary embodiment of the present application;

Fig. 7 is a flow chart illustrating a cell reselection procedure in accordance with an exemplary embodiment of the present application;

fig. 8 is a flowchart illustrating a cell handover procedure according to an exemplary embodiment of the present application;

Fig. 9 is a schematic diagram illustrating an implementation of a cell handover procedure according to an exemplary embodiment of the present application;

Fig. 10 is a schematic diagram illustrating an implementation of a cell handover procedure according to another exemplary embodiment of the present application;

Fig. 11 is a schematic diagram illustrating an implementation of a cell handover procedure according to another exemplary embodiment of the present application;

Fig. 12 is a block diagram of a cell preference apparatus according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

References herein to "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

Fig. 1 shows a block diagram of a communication system provided by an exemplary embodiment of the present application, which may include: access network 12 and terminal 13.

Access network 12 includes a number of network devices 120 therein. The network device 120 may be a base station, which is a means deployed in an access network to provide wireless communication functionality for terminals. The base stations may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems employing different radio access technologies, the names of devices with base station functions may be different, for example, in LTE systems, called evolved Node bs (enodebs) or enbs; in a 5G New air interface (NR) system, it is called gNodeB or gNB. As communication technology evolves, the description of "base station" may change. For convenience, the above-mentioned devices for providing the wireless communication function for the terminal 13 are collectively referred to as a network device in the embodiments of the present application.

The terminal 13 may include various handheld devices, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment, mobile Stations (MSs), terminals (TERMINAL DEVICE), and the like, having wireless communication capabilities. For convenience of description, the above-mentioned devices are collectively referred to as a terminal. The network device 120 and the terminal 13 communicate with each other via some kind of air interface technology, e.g. Uu interface.

The technical scheme of the embodiment of the application can be applied to various communication systems, such as: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, general Packet Radio Service (GPRS), long term evolution (Long Term Evolution, LTE) system, LTE frequency division duplex (Frequency Division Duplex, FDD) system, LTE time division duplex (Time Division Duplex, TDD) system, long term evolution advanced (Advanced Long Term Evolution, LTE-a) system, new Radio (NR) system, NR system evolution system, LTE on unlicensed band (LTE-based access to Unlicensed spectrum, LTE-U) system, NR-U system, universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), global interconnect microwave access (Worldwide Interoperability for Microwave Access, wiMAX) communication system, wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (WIRELESS FIDELITY, WIFI), next generation communication system or other communication system, and the like.

The cell preference method provided by the embodiment of the application is used for the terminal 13 in the communication system shown in fig. 1.

Referring to fig. 2, a block diagram of a terminal according to an exemplary embodiment of the present application is shown. The terminal 13 in the present application may comprise one or more of the following components: processor 131, memory 132, receiver 133, and transmitter 134.

Processor 131 may include one or more processing cores. The processor 131 connects various parts within the overall terminal 13 using various interfaces and lines, performs various functions of the terminal 13 and processes data by executing or executing instructions, programs, code sets, or instruction sets stored in the memory 132, and invoking data stored in the memory 132. Alternatively, the processor 131 may be implemented in at least one hardware form of digital signal Processing (DIGITAL SIGNAL Processing, DSP), field-Programmable gate array (Field-Programmable GATE ARRAY, FPGA), programmable logic array (Programmable Logic Array, PLA). The processor 131 may integrate one or a combination of several of a central processing unit (Central Processing Unit, CPU), an image processing unit (Graphics Processing Unit, GPU), a neural network processing unit (Neural-network Processing Unit, NPU), a modem, etc. The CPU mainly processes an operating system, a user interface, an application program and the like; the GPU is used for rendering and drawing the content required to be displayed by the touch display screen; the NPU is used for realizing an artificial intelligence (ARTIFICIAL INTELLIGENCE, AI) function; the modem is used to handle wireless communications. It will be appreciated that the modem may not be integrated into the processor 131 and may be implemented by a single chip.

The Memory 132 may include random access Memory (Random Access Memory, RAM) or Read-Only Memory (ROM). Optionally, the memory 132 includes a non-transitory computer readable medium (non-transitory computer-readable storage medium). Memory 132 may be used to store instructions, programs, code sets, or instruction sets. The memory 132 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playing function, an image playing function, etc.), instructions for implementing the various method embodiments described below, etc.; the storage data area may store data (such as audio data, phonebook) created according to the use of the terminal 13, and the like.

The receiver 133 and the transmitter 134 may be implemented as one communication component, which may be a communication chip.

Optionally, the terminal 13 may also include a display screen. The display screen is a display component for displaying a user interface. Optionally, the display screen also has a touch function, through which a user can perform a touch operation on the display screen using any suitable object such as a finger, a touch pen, or the like.

In addition, in order to realize the voice call function, the terminal in the embodiment of the present application further includes a microphone and a speaker, which are not described herein.

In addition, it will be appreciated by those skilled in the art that the structure of the terminal 13 illustrated in the above-described figures is not limiting and that the terminal may include more or less components than illustrated, or certain components may be combined, or different arrangements of components. For example, the terminal 13 further includes components such as a camera module, a radio frequency circuit, an input unit, a sensor (such as an acceleration sensor, an angular velocity sensor, a light sensor, etc.), an audio circuit, a wireless fidelity (WIRELESS FIDELITY, WIFI) module, a power supply, a bluetooth module, etc., which are not described herein.

In the related art, when a terminal performs cell preference, the terminal is based on the reference signal received Power (REFERENCE SIGNAL RECEIVING Power, RSRP) of the cell only, and the availability of the cell is not considered. However, in the real network, abnormal cells which cannot provide services for the terminal often occur, and when the cells preferentially reach the abnormal cells, the terminal cannot normally acquire the services. For example, for long term evolution (Long Term Evolution, LTE) and stand alone networking (SA) cells, radio link failure (Radio Link Failure, RLF) may occur frequently in abnormal cells; for Non-independent Networking (NSA) cells, secondary cell failures (Secondary Cell Group Failure, SCG Failure) may frequently occur in abnormal cells. The terminal accesses the abnormal cell, normal communication service of the terminal cannot be performed, and frequent RFL or SCG Failure can cause the increase of power consumption of the terminal.

In order to improve the cell preferred effect, the embodiment of the application introduces an abnormal cell detection mechanism based on RLF and SCG Failure, under the mechanism, before cell preferred, the terminal determines the abnormal cell frequently abnormal based on the occurrence times of the abnormality, thereby considering the availability of the cell when the cell preferred, removing the abnormal cell and carrying out the cell preferred, avoiding the preferred to the abnormal cell, and further improving the preferred quality of the cell. The following description uses exemplary embodiments.

Referring to fig. 3, a flowchart of a cell preference method according to an exemplary embodiment of the present application is shown. This embodiment is illustrated by way of example in which the method is performed by the terminal 13 shown in fig. 1, the process comprising the steps of:

step 302, determining an abnormal cell, wherein the abnormal cell is determined based on the abnormal occurrence times of the cell, and the abnormal occurrence times of the cell comprise at least one of the failure times of a radio link and the failure times of a secondary cell.

In one possible implementation manner, before performing cell selection, cell reselection or cell handover, the terminal first determines an abnormal cell existing in the current area, where the abnormal cell may be determined by the terminal based on the number of occurrence of cell abnormality in the history residence process, or may be obtained by the terminal through a server (determined and reported by other terminals in the area based on the number of occurrence of cell abnormality).

In some embodiments, after the terminal is started and camps on a cell corresponding to the network system, counting the abnormal occurrence times of the cell of the current camping cell, so as to determine whether the cell is an abnormal cell. The abnormal cell may be a cell in which the number of times of occurrence of cell abnormality reaches a threshold number of times.

Optionally, if the current resident cell is an LTE cell or an SA cell, the terminal counts the number of radio link failures, and determines a cell with the number of radio link failures reaching a number threshold as an abnormal cell; if the current resident cell is an NSA cell, the terminal counts the failure times of the auxiliary cell, and determines the cell with the failure times reaching the threshold of the times as the abnormal cell. It should be noted that, in this embodiment, the network system is only described by way of example, and the present embodiment may also be applied to network systems such as 3G or WiFi, and the present embodiment is not limited to this configuration.

Step 304, performing cell preference based on the abnormal cells, wherein the cell preference comprises at least one of cell selection preference, cell reselection preference and cell switching preference.

In order to reduce the probability of failure to obtain service after cell preference, in one possible implementation, when cell preference is performed based on an abnormal cell, the terminal reduces the priority of the abnormal cell, thereby reducing the probability of preference to the abnormal cell; and/or the terminal excludes the abnormal cell from the preferred range, avoids preferred to the abnormal cell, and reduces the probability that the terminal cannot acquire service after the cell is preferred.

Alternatively, the cell preference procedure may include a cell selection procedure and a cell reselection procedure in an idle state (idle), and a cell handover procedure in a connected state (connected).

In summary, in the embodiment of the present application, before cell preference is performed, firstly, an abnormal cell is determined based on the occurrence times of cell abnormality, then cell preference is performed based on the determined abnormal cell, and the abnormal cell in which radio link failure or secondary cell failure frequently occurs is excluded from the preferred range, so that the problem that the terminal cannot obtain normal service due to selection to the abnormal cell, reselection to the abnormal cell, and switching to the abnormal cell is avoided, which is conducive to improving the quality of service obtained by the terminal, and avoiding the increase of power consumption of the terminal due to frequent radio link failure or secondary cell failure.

For the same type of cell abnormality, the reasons for causing the cell abnormality may be different, and accordingly, the recovery conditions of the cell abnormality caused by different reasons also have differences. For example, RLF anomalies may be caused by coverage (e.g., terminals are at the cell-wide edge) or by network configuration (e.g., configured parameters do not conform to standard protocols); and, the RLF abnormality caused by the coverage can be recovered when the terminal position moves, and the RLF abnormality caused by the network configuration needs to be recovered after the parameter reconfiguration, i.e. the RLF abnormality caused by the coverage is easier to recover than the RLF abnormality caused by the network configuration.

Obviously, it is evident from the above analysis that it is obviously inappropriate to apply the same strategy to all abnormal cells during cell preference, which may lead to a terminal being unable to prefer to the cell that has recovered from the abnormality for a long time. In order to improve the rationality of cell preference based on abnormal cells, in one possible implementation, the terminal further divides the abnormal cells based on the reasons of the abnormality and adopts different strategies for different abnormal cells when the cells are preferred, as shown in fig. 4, the method may include the following steps:

step 401, determining the occurrence times of cell abnormality of a target cell in a first duration.

Wherein the target cell is a current resident cell of the terminal. In one possible implementation manner, after the terminal resides in the target cell, a timer of a first duration is started, and the number of times of occurrence of cell abnormality of the target cell is counted, so that the number of times of occurrence of cell abnormality in the first duration is determined when the timer is overtime. The first duration of the timer may be a preset value or a custom value, for example, the first duration is 1 minute.

In some embodiments, when the target cell is an LTE cell or an SA cell, the terminal determines a number of radio link failures within a first duration; when the target cell is an NSA cell, the terminal determines the number of times of secondary cell failure in the first time period.

In step 402, in response to the number of occurrences of the cell anomaly being greater than the number threshold, an anomaly cause is determined, the anomaly cause including a network configuration anomaly or a coverage anomaly.

Optionally, the terminal determines the abnormal cell based on the frequency threshold. When the abnormal occurrence times of the target cell in the first time length reach a time threshold, the terminal determines that the target cell is an abnormal cell; when the abnormal occurrence times of the target cell in the first time period are smaller than the time threshold, the terminal determines that the target cell is a normal cell.

In one possible implementation, the terminal sets a uniform frequency threshold for cells using different access technologies, e.g., the frequency thresholds corresponding to LTE, SA, and NSA cells are all set to 6 times.

And, for the target cell whose number of occurrence of cell abnormality is greater than the number threshold, the terminal needs to further determine the cause of the abnormality so as to further subdivide the abnormal cell according to the cause of the abnormality later. In one possible embodiment, the terminal acquires an abnormality cause value at the time of occurrence of a cell abnormality, thereby determining the cause of the abnormality based on the abnormality cause value.

In this embodiment, the reasons for the anomaly are divided into two categories, namely network configuration anomaly and coverage anomaly. The network configuration abnormality is caused by improper configuration parameters (such as SCG configuration failure) at the network equipment side, the abnormality can be recovered by manually re-configuring the parameters, the abnormality recovery difficulty is high, and the time consumption is long; the coverage abnormality is caused by signal coverage (such as random access failure and downlink out-of-step), and the abnormality can be recovered when the position of the terminal moves, so that the abnormality recovery difficulty is low and the time consumption is short.

However, in view of the difference in quality of service provided by cells employing different access technologies (i.e., cells of different network systems), and the subsequent cell preference is generally performed in the evolution order of the access technologies (e.g., in the order of 5g→lte→3G), in order to avoid easily determining cells that are better in coverage and capable of improving better service as abnormal cells, in another possible embodiment, the terminal sets respective corresponding times for the cells employing different access technologies.

Optionally, the terminal determines the frequency threshold based on the access technology adopted by the target cell, wherein the frequency threshold and the evolution sequence of the access technology are in a negative correlation relationship, i.e. the more advanced the access technology adopted by the cell (i.e. the more backward the evolution sequence), the smaller the frequency threshold corresponding to the cell.

In one illustrative example, LTE cells have better coverage, fewer abnormal cells, less difference in quality of service from 5G cells than 5G (including SA cells and NSA cells), and when a 5G cell is determined to be an abnormal cell, the terminal may continue to select LTE cells; when the LTE cell is determined to be an abnormal cell, the terminal may drop to the 2/3G cell, and the quality of service (such as the network access speed) provided by the 2/3G cell is far worse than that of the LTE cell. In order to avoid easily determining the LTE cell as an abnormal cell, the terminal sets the frequency threshold corresponding to the LTE cell to 8 times, and the frequency threshold corresponding to the SA and NSA cells to 4 times. When the radio link failure times of the LTE cell in the first time length reach 8 times, the terminal determines that the LTE cell is an abnormal cell; when the number of radio link failures of the SA-cell in the first duration reaches 4, the SA-cell is determined as an abnormal cell.

In step 403, in response to the abnormality being a coverage abnormality, the target cell is determined to be a first abnormal cell.

When the number of times of occurrence of cell abnormality of the target cell is greater than the number threshold and the abnormality cause is coverage abnormality, the terminal determines the target cell as a first abnormal cell. Illustratively, the terminal determines the number of radio link failures within 1 minute to be 6, and the LTE cell resulting from the coverage abnormality of the radio link failure is determined as the first abnormal cell.

And step 404, determining the target cell as a second abnormal cell in response to the abnormality cause being the network configuration abnormality.

And when the number of times of occurrence of the cell abnormality of the target cell is larger than the number threshold and the abnormality reason is network configuration abnormality, the terminal determines the target cell as a second abnormal cell. Illustratively, the terminal determines that the secondary cell failure number reaches 6 times within 1 minute, and the NSA cell caused by the SCG configuration failure is the second abnormal cell.

Step 405, decrease the cell priority of the first abnormal cell and add the second abnormal cell to the blacklist, cells in the blacklist being excluded during cell selection, cell reselection and cell handover.

In a possible implementation manner, the terminal sets different abnormal punishment strategies for different types of abnormal cells, and performs preferential punishment on the abnormal cells in the cell preferential process, namely based on the abnormal punishment strategies. The first abnormal punishment strategy corresponding to the first abnormal cell and the second abnormal punishment strategy corresponding to the second abnormal cell are higher than the first abnormal punishment strategy in punishment degree.

Optionally, since the abnormality of the first abnormal cell is easy to recover, the terminal performs preferential punishment on the first abnormal cell by adopting a mode of reducing the priority of the cell, that is, the first abnormal cell is still likely to be selected in the cell preferential process, and the priority is only lower than that of other normal cells.

With respect to the specific way of reducing the priority of the cell, since the RSRP value of the cell is an important indicator in the cell preference procedure, in one possible implementation, the terminal reduces the RSRP value of the first abnormal cell based on the target penalty value, i.e. in the cell preference procedure, the RSRP value of the first abnormal cell is the actual RSRP measured value minus the target penalty value. For example, when the target penalty value is 6dbm and the actual RSRP measured value of the RSRP of the first abnormal cell is-50 dbm, in the cell preference process, the RSRP value of the first abnormal cell is-56 dbm.

Optionally, because the abnormal recovery of the second abnormal cell is difficult, in order to avoid selecting the second abnormal cell in the preferential process, the terminal adds the second abnormal cell to a blacklist, wherein cells in the blacklist are to be removed in the preferential process of the cell, that is, the second abnormal cell is blocked (barred) in the preferential process of the cell, so as to ensure that the second abnormal cell is not selected in the preferential process of the cell.

In step 406, cell preference is performed based on the blacklist.

After punishment is carried out on the first abnormal cell and the second abnormal cell through the steps, the terminal carries out cell preference based on the blacklist, and the second abnormal cell is excluded from the cell preference range.

In this embodiment, the terminal subdivides the abnormal cell into a first abnormal cell which is easy to recover from the abnormality and a second abnormal cell which is difficult to recover from the abnormality based on the abnormality cause causing the abnormality of the cell, and adopts different punishment mechanisms for the first abnormal cell and the second abnormal cell in the cell preference process, thereby improving the rationality of the cell preference process.

In addition, in this embodiment, before the terminal determines the abnormal cell, the number of times threshold used when measuring the abnormal cell is determined based on the access technology adopted by the cell, so as to avoid using uniform measurement indexes for all cells, further improve the rationality of the determined abnormal cell, and further improve the quality of the cell preference process.

In order to enable the abnormal cell to be selected in the cell selection process after the abnormal cell is recovered, in one possible implementation manner, the terminal determines the target cell as the first abnormal cell in the second time period in response to the abnormal source being the coverage abnormality, determines the target cell as the second abnormal cell in the third time period in response to the abnormal source being the network configuration abnormality, and the third time period is longer than the second time period because the recovery time of the network configuration abnormality is often longer than the coverage abnormality.

Illustratively, the second duration is 10 minutes and the third duration is 4 hours.

Further, if the coverage abnormality still exists in the target cell after the cell preferred penalty of the second duration, the terminal increases the cell preferred penalty of the target cell. In one possible implementation manner, after determining the target cell as the first abnormal cell in the second time period, the terminal determines the number of times of occurrence of cell abnormality of the target cell in the first time period again in response to reaching the second time period, and determines the target cell as the second abnormal cell in the third time period in response to the number of times of occurrence of cell abnormality being greater than the number threshold and the abnormality cause being coverage abnormality.

The process of determining the occurrence times and the reasons of the cell abnormality by the terminal may refer to the above embodiment, and this embodiment is not described herein.

In order to avoid easily determining a cell which has better coverage and can improve better service as a second abnormal cell, when the terminal detects that the coverage of the target cell is abnormal again, the terminal needs to combine with the access technology adopted by the target cell to determine whether the target cell needs to be determined as the second abnormal cell.

In one possible implementation manner, in response to the occurrence number of cell anomalies being greater than the number threshold, and the anomaly cause being coverage anomalies, and the target cell adopting the first access technology, the terminal determines the target cell as a second anomaly cell within a third duration;

And in response to the occurrence times of the cell anomalies being greater than the time threshold, wherein the anomaly cause is coverage anomalies, and the target cell adopts a second access technology, the terminal determines the target cell as a first anomaly cell within a second duration, wherein the evolution of the second access technology is earlier than that of the first access technology.

In some embodiments, the first access technology is an LTE technology, and the second access technology is an NR technology, that is, when coverage abnormality occurs again in an LTE cell, the terminal continues to determine the LTE cell as a first abnormal cell, which does not increase preferential penalty to the LTE cell; and when the coverage abnormality occurs again in the SA cell, the terminal continuously determines the SA cell as a second abnormal cell, and the preferential penalty of the LTE cell is improved.

In an illustrative example, as shown in fig. 5, the process of determining an abnormal cell by the terminal includes:

501, a1 minute timer is started.

502, If the resident cell is an LTE cell, detecting whether the RLF number of the LTE cell reaches 8 times within 1 minute. If so, step 503 is executed, and if not, the process is ended, and the LTE cell is determined to be a normal cell.

503, Detecting whether the RLF cause is a network configuration abnormality. If the network configuration is not abnormal, step 504 is executed, and if the network configuration is abnormal, step 505 is executed.

504, The priority of the LTE cell is reduced for 10 minutes.

505, LTE cells are added to the blacklist for 4 hours.

506, If the camping cell is the SA cell, the RLF number of the SA cell is detected for 4 times within 1 minute. If so, step 507 is executed, and if not, the process is ended, and the SA cell is determined to be a normal cell.

507, Detecting whether the RLF cause is a network configuration anomaly. If the network configuration is not abnormal, step 508 is executed, and if the network configuration is abnormal, step 510 is executed.

508, The priority of the SA-cell is reduced for 10 minutes.

509 Detects whether the RLF number of the SA cell reaches 4 again. If so, go to step 510, and if not, end.

510, Adding the SA-cell to the blacklist for 4 hours.

511, If the resident cell is an NSA cell, the number of SCG failures of the NSA cell in 1 minute is up to 4. If so, step 512 is performed, and if not, the process ends, and the NSA cell is determined to be a normal cell.

512, Detecting whether the reason for the SCG failure is network configuration abnormality. If the network configuration is not abnormal, step 513 is executed, and if the network configuration is abnormal, step 515 is executed.

513, The priority of NSA cells is reduced for 10 minutes.

514, It is checked whether the number of SCG failures of NSA cells reaches 4 again. If so, step 515 is performed, and if not, the process ends.

515, NSA cells are added to the blacklist for 4 hours.

In the above embodiments, the LTE cell, the SA cell, and the NSA cell are described schematically as examples, but this configuration is not limited thereto.

The above embodiments have described the determination process of the abnormal cell, and the following embodiments are used to describe the cell selection process, the cell reselection process, and the cell handover process after the determination of the abnormal cell, respectively.

Referring to fig. 6, a flowchart of a cell selection process provided by an exemplary embodiment of the present application is shown. The process comprises the following steps:

Step 601, a candidate cell is determined based on the abnormal cell.

In one possible embodiment, when the determined abnormal cell includes a first abnormal cell and a second abnormal cell, the terminal determines cells other than the second abnormal cell as candidate cells (including the first abnormal cell).

Step 602, obtaining a minimum access level threshold configured by the network device for the candidate cell.

The decision criterion for cell selection is called S criterion, a cell with Srxlev >0 is selectively camped, where srxlev=qrxlevmeas- (qrxlevmin+ Qrxlevminoffset) -Pcompensation.

Qrxlevmeas is the RSRP value of the candidate cell;

Qrxlevmin and Qrxlevminoffset are the minimum access level threshold (configured in SIB 1) for cell camping configured in SIB, and the offset value of the minimum access level, respectively;

Pcompensation is to take the difference between the maximum available transmit power PEMAX of the terminal uplink minus the maximum radio frequency output power PUMAX of the terminal, and the maximum value among 0 (i.e., MAX (PEMAX-PUMAX, 0)). In the existing network, the values of Qrxlevminoffset and Pcompensation are generally zero, and the simple understanding of the S criterion is that the measurement level of the cell is greater than Qrxlevmin, and the cell meets the residence condition.

In one possible implementation, to determine whether the candidate cells meet the camping condition, the terminal obtains the minimum access level threshold configured by each candidate cell from SIB1 issued by the network device.

In step 603, in response to the candidate cell adopting the third access technology, and the minimum access level threshold being less than the first customized threshold, the first customized threshold is determined as the cell minimum access level threshold of the candidate cell.

In the related art, when the RSRP value of the candidate cell reaches the configured minimum access level threshold, the terminal determines that the candidate cell can camp on. In order for a terminal to preferentially camp on a cell employing the latest access technology (e.g., camping on a 5G cell), the network device typically configures a lower minimum access level threshold for such cells.

However, in this configuration, the terminal easily accesses the weak signal cell using the latest access technology, and in practical cases, the communication quality of the terminal in such a weak signal cell is not as good as that of the strong signal cell using the non-latest access technology. For example, the communication experience of the terminal in the 5G weak signal cell is not as good as that in the LTE strong signal cell.

Thus, to improve the quality of service in the camping cell, the terminal sets a customized minimum access level threshold for the cell employing the third access technology. And when the candidate cell adopts a third access technology and the minimum access level threshold is smaller than the first customized threshold (namely, the customized minimum access level threshold), determining the first customized threshold as the cell minimum access level threshold of the candidate cell. When the minimum access level threshold is greater than or equal to the first customized threshold (i.e., the customized minimum access level threshold), the terminal determines the minimum access level threshold configured by the network as the cell minimum access level threshold of the candidate cell.

Wherein the first customized threshold is generally higher than a minimum access level threshold configured by the network side for a cell employing the third access technology. For example, for a 5G cell, the minimum access level threshold configured by the network device is-120 dbm, while the minimum access level threshold customized by the terminal for the 5G cell is-110 dbm.

In the above embodiment, the third access technology is only exemplified by the 5G technology, and in other possible embodiments, the third access technology may be another latest communication technology, which is not limited in this embodiment.

Step 604, cell selection is performed based on the cell minimum access level threshold and cell selection criteria.

Further, when the RSRP measured value of the candidate cell reaches the minimum access level threshold of the cell, the terminal determines that the candidate cell meets the residence condition; when the RSRP measured value of the candidate cell does not reach the minimum access level threshold of the cell, the terminal determines that the candidate cell does not meet the residence condition.

When the candidate cell is the first abnormal cell, the terminal needs to punish the actual RSRP measured value of the candidate cell, and detect whether the punished RSRP measured value reaches the minimum access level threshold of the cell.

In this embodiment, the terminal performs cell selection based on the customized minimum access level threshold, so as to avoid the terminal from camping on the weak signal cell adopting the latest access technology, and facilitate improving the communication quality of the terminal after camping.

Referring to fig. 7, a flowchart of a cell reselection procedure provided by an exemplary embodiment of the present application is shown. The process comprises the following steps:

step 701, determining a target neighbor cell based on the abnormal cell.

In one possible implementation, when the determined abnormal cell includes the first abnormal cell and the second abnormal cell, the terminal determines neighboring cells other than the second abnormal cell as target neighboring cells (including the first abnormal cell).

Step 702, acquiring a neighbor cell RSRP value and a neighbor cell SNR value of a target neighbor cell.

The criterion of cell reselection is called R criterion, and Rs of the serving cell and Rn of the neighbor cell respectively meet the following criteria

Rs＝Qmeas,s+QHyst

Rn＝Qmeas,n–Qoffset

Wherein Qmeas s is an RSRP measurement value of a serving cell, qmeas, n is an RSRP measurement value of a neighboring cell, qoffset defines an offset value of the neighboring cell, QHyst is a cell reselection hysteresis. In Treselection (the default configuration of the current network is 1 s), if Rn is continuously greater than Rs, the terminal reselects to the neighbor cell.

Obviously, in the related art, only RSRP of the neighboring cell is considered during cell reselection, and Signal-to-Noise Ratio (SNR) of the neighboring cell is not considered, that is, interference condition of the neighboring cell is not considered. In this way, the terminal may reselect to a neighboring cell where strong interference exists.

In order to improve the quality of cell reselection, in this embodiment, the terminal optimizes the cell reselection process, and uses the RSRP and the SNR of the neighboring cell together as the basis of cell reselection. Therefore, after determining the target neighbor cell, the terminal measures the target neighbor cell to obtain the neighbor cell RSRP value and the neighbor cell SNR value of the target neighbor cell.

In step 703, in response to the neighboring cell RSRP value meeting the cell reselection criterion, and the neighboring cell SNR value reaching a second customized threshold, triggering cell reselection.

In some embodiments, an SNR customization threshold (e.g., 40 dB) is provided in the terminal. And when determining whether the target neighbor cell meets the cell reselection condition, the terminal detects whether the neighbor cell RSRP value meets the cell reselection criterion and detects whether the neighbor cell SNR value meets a second customized threshold (namely the SNR customized threshold), and if the neighbor cell RSRP value meets the cell reselection criterion and the neighbor cell SNR value meets the second customized threshold (required to reach Treselection), the terminal triggers cell reselection.

When the target neighbor cell is the first abnormal cell, the terminal needs to punish the actual RSRP measured value of the target neighbor cell, and detects whether the punished RSRP measured value meets the cell reselection criterion.

In this embodiment, the terminal considers the signal strength and the interference condition of the neighboring cells together in the cell reselection process by customizing the SNR threshold, so as to avoid the terminal from reselecting to the cell with strong interference, and thus, the terminal is beneficial to improving the communication quality after reselection.

Referring to fig. 8, a flowchart of a cell handover procedure according to an exemplary embodiment of the present application is shown. The process comprises the following steps:

step 801, determining a target neighbor cell based on the abnormal cell.

In one possible implementation manner, when the determined abnormal cell includes a first abnormal cell and a second abnormal cell, the terminal determines neighboring cells except the second abnormal cell as target neighboring cells (including the first abnormal cell) in a cell switching process.

Step 802, performing cell measurement based on measurement configuration issued by the network device to obtain a cell measurement result, where the cell measurement result includes a neighbor cell measurement result of the target neighbor cell and a serving cell measurement result of the serving cell.

In a possible implementation manner, the terminal measures the serving cell and the neighbor cell based on the measurement configuration issued by the network device corresponding to the current serving cell, so as to obtain a serving cell measurement result and a neighbor cell measurement result. The serving cell measurement result comprises a serving cell RSRP value, and the neighbor cell measurement result comprises a neighbor cell RSRP value.

Optionally, in order to avoid switching to a strong interference neighbor cell, in the process of cell measurement, the terminal also needs to perform SNR measurement on the serving cell and the neighbor cell to obtain the SNR value of the serving cell and the SNR value of the neighbor cell.

Step 803, performing cell handover based on the cell measurement result and the customized handover condition.

Cell handovers can be categorized into intra-system handovers (e.g., 5g→lte) which are typically based on A3/A4/A5 events and inter-system handovers (e.g., lte→lte) which are typically based on B1/B2 events.

Event A1 (Serving becomes better than threshold): indicating that the signal quality of the serving cell is higher than a certain threshold, and stopping inter-frequency/inter-system measurement by the cell when an event meeting the condition is reported;

Event A2 (Serving becomes worse than threshold): indicating that the signal quality of the serving cell is lower than a certain threshold, and starting inter-frequency/inter-system measurement by the cell when an event meeting the condition is reported;

Event A3 (Neighbour becomes offset better THAN SERVING): indicating that the same frequency/different frequency neighbor cell quality is higher than the service cell quality, when an event meeting the condition is reported, the source cell starts a handover request (usually coverage-based handover);

event A4 (Neighbour becomes better than threshold): when an event meeting the condition is reported, the source cell starts a pilot frequency switching request (switching based on load balancing in general);

Event A5 (Serving becomes worse than threshold1 and neighbour becomes better than threshold 2): indicating that the quality of the serving cell is lower than a certain threshold and the quality of the neighbor cell is higher than a certain threshold;

Event B1 (Inter RAT neighbour becomes better than threshold): indicating that the quality of the neighboring cells of the different system is higher than a certain threshold, and starting a switching request of the different system by a source cell when an event meeting the condition is reported;

Event B2(Serving becomes worse than threshold1 and inter RAT neighbour becomes better than threshold2)： Indicating that the quality of the serving cell is below a certain threshold and that the quality of the inter-system neighbor cell is above a certain threshold.

Taking A3 inter-frequency handover as an example, when the signal strength of a serving cell is lower than a threshold value, a terminal reports A2 measurement report to a network, the network is triggered to start inter-frequency/inter-system measurement, when the serving cell continues to fall for a certain time and is lower than the signal strength of a neighboring cell, the terminal reports A3 measurement report to a base station, and after receiving the A3 measurement report, the base station sends a handover command containing a reconfiguration message to the terminal to instruct the terminal to switch to the neighboring cell.

Obviously, in the related art, only RSRP of a cell is considered in cell reselection, but not SNR of the cell, in this way, a terminal may reselect to a neighboring cell with strong interference. In addition, in order to make the terminal switch to the cell adopting the latest access technology (such as camping on the 5G cell) preferentially, the network device generally configures a lower threshold for such a cell, which causes that the terminal is easy to switch to the weak cell, and affects the normal communication of the terminal.

In order to improve the service quality of the terminal after cell switching, in the embodiment of the application, the terminal is provided with customized switching conditions, and correspondingly, the terminal triggers cell switching based on the cell measurement result and the customized switching conditions. Optionally, different cell handover scenarios correspond to different customized handover conditions, and the customized handover conditions customize thresholds of both RSRP and SNR.

In one possible implementation, when the serving cell adopts the fourth access technology and the target neighbor cell adopts the fifth access technology, and the evolution of the fourth access technology is earlier than the evolution of the fifth access technology, the cell handover procedure may include the following steps.

1. And responding to the neighbor cell RSRP value of the target neighbor cell reaching the configuration threshold of the network equipment, and obtaining the neighbor cell SNR value of the target neighbor cell when the duration reaches the configuration duration.

In some embodiments, when the terminal currently resides in a serving cell adopting the fourth access technology and the target neighboring cell adopts the fifth access technology, after the terminal measures the target neighboring cell based on a measurement configuration (B1 event measurement configuration) issued by the serving cell, it is detected whether an RSRP value of the neighboring cell of the target neighboring cell reaches a configuration threshold and whether a duration reaches a configuration duration (TTT). If not, determining that the target neighbor cell does not meet the cell switching condition.

Since in the current network, in order to make a terminal switch preferentially in a cell employing the latest access technology (such as camping on a 5G cell), the network device typically configures a lower minimum access level threshold for such a cell. However, with this configuration, the terminal is easy to switch to the weak signal cell using the latest access technology, and in practical cases, the communication quality of the terminal in such a weak signal cell is not as good as that of the strong signal cell using the non-latest access technology. For example, the communication experience of the terminal in the 5G weak signal cell is not as good as that in the LTE strong signal cell.

Therefore, in order to avoid switching to the weak signal neighbor cell adopting the fifth access technology, the terminal needs to further detect whether the target neighbor cell satisfies the customized cell switching condition. In addition, in order to avoid switching to the strong interference cell, the terminal needs to further acquire the neighbor cell SNR value of the neighbor cell.

When the neighbor cell RSRP value of the target neighbor cell meets the cell switching condition configured by the network equipment, the terminal further acquires the neighbor cell SNR value and determines whether the target neighbor cell meets the customized cell switching condition based on the neighbor cell RSRP value and the neighbor cell SNR value.

2. And responding to the fact that the RSRP value of the adjacent cell reaches a third custom threshold, the SNR value of the adjacent cell reaches a fourth custom threshold, the duration reaches the configuration duration, the custom switching condition is met, the cell switching is triggered, and the third custom threshold is higher than the configuration threshold.

In some embodiments, the terminal-set customized cell handover conditions include customized RSRP conditions and customized SNR conditions. When the RSRP value of the neighbor cell reaches a third customized threshold and the duration reaches a configuration duration (for example, 1 minute), the terminal determines that the target neighbor cell meets the customized RSRP condition; when the SNR value of the neighboring cell reaches a fourth customized threshold (e.g., 30 dB) and the duration reaches the configured duration, the terminal determines that the target neighboring cell satisfies the customized SNR condition. Wherein the third custom threshold is higher than the configuration threshold of the network device, such as the configuration threshold of the network device is-120 dbm and the third custom threshold is-110 dbm.

Further, when the customized switching condition is met, the terminal reports a measurement report to the network equipment to trigger cell switching.

Illustratively, as shown in fig. 9, when the terminal resides in the LTE cell and the target neighbor cell is the SA cell, the cell handover procedure may include the following steps:

step 901, according to the measurement configuration of the LTE cell issuing B1, cell measurement is performed on the SA neighboring cell.

Step 902, it is detected whether the RSRP value of the SA-neighboring cell reaches a configuration threshold and the TTT time is continued. If so, step 903 is executed, and if not, the process ends (the cell handover condition is not satisfied).

In step 903, it is detected whether the RSRP value of the SA-neighboring cell reaches the third custom threshold, and the SNR value reaches the fourth custom threshold, and the TTT time is continued. If so, step 904 is performed, and if not, the process ends (the custom switch condition is not satisfied).

Step 904, reporting the B1 measurement report, triggering handover.

In another possible implementation, when the serving cell adopts the fifth access technology and the target neighbor cell adopts the fourth access technology, and the evolution of the fourth access technology is earlier than the evolution of the fifth access technology, the cell handover procedure may include the following steps.

1. And acquiring the neighbor cell RSRP value and the neighbor cell SNR value of the target neighbor cell in response to the serving cell RSRP value of the serving cell being lower than the RSRP threshold.

Unlike the first cell switching scenario described above, in which the terminal needs to delay switching, i.e., to prevent the terminal from switching to the target neighbor cell of the weak signal, the terminal in the cell switching scenario in this embodiment needs to accelerate switching, i.e., to avoid the terminal from camping on the weak signal serving cell.

In some embodiments, when the terminal currently resides in a serving cell adopting the fifth access technology and the target neighbor cell adopts the fourth access technology, the terminal measures the target neighbor cell based on a measurement configuration (B1 event measurement configuration) issued by the serving cell, and acquires a neighbor cell RSRP value and a neighbor cell SNR value of the target neighbor cell when the serving cell RSRP value of the serving cell is lower than an RSRP threshold.

2. And responding to the fact that the RSRP value of the adjacent cell reaches a fifth customizing threshold and the SNR value of the adjacent cell reaches a sixth customizing threshold, determining that the customizing switching condition is met, triggering the cell switching, wherein the fifth customizing threshold is lower than the configuration threshold of the network equipment.

In some embodiments, the terminal-set customized cell handover conditions include customized RSRP conditions and customized SNR conditions. When the RSRP value of the neighbor cell reaches a fifth customization threshold and the duration reaches the configuration duration, the terminal determines that the target neighbor cell meets the customization RSRP condition; when the SNR value of the neighboring cell reaches a sixth customized threshold (e.g., 30 dB), and the duration reaches the configured duration, the terminal determines that the target neighboring cell satisfies the customized SNR condition. In order to make the terminal switch to the target neighbor cell with better signal as soon as possible, the fifth customized threshold is lower than the configuration threshold of the network device, for example, the configuration threshold of the network device is-80 dbm, and the fifth customized threshold is-90 dbm.

Illustratively, as shown in fig. 10, when the terminal resides in the SA cell and the target neighbor cell is the LTE cell, the cell handover procedure may include the following steps:

in step 1001, according to the measurement configuration of the SA cell issue B1, cell measurement is performed on the LTE neighbor cell.

Step 1002, it is detected whether the RSRP value of the LTE neighboring cell satisfies the B1 threshold value, and the TTT time is continued. If so, step 1003 is executed, and if not, the process ends (the cell handover condition is not satisfied).

In step 1003, when the RSRP value of the SA-cell is lower than the RSRP threshold, it is detected whether the RSRP value of the LTE neighbor cell reaches the fifth customization threshold, and the SNR value reaches the sixth customization threshold. If so, step 1004 is executed, and if not, the process ends (the custom switch condition is not satisfied).

Step 1004, reporting a B1 measurement report, and triggering handover.

In another possible implementation, when the serving cell and the target neighbor cell employ the same access technology, the cell handover procedure may include the following steps.

1. And acquiring the neighbor cell RSRP value and the neighbor cell SNR value of the target neighbor cell in response to the serving cell RSRP value of the serving cell reaching a seventh customized threshold and the serving cell SNR value reaching an eighth customized threshold.

The switching optimization thought between cells under the same access technology is as follows: when the RSRP and the SNR of the serving cell reach the customized threshold, the serving cell can be considered to provide effective service, and when the RSRP or the SNR of the neighbor cell does not reach the customized threshold, the neighbor cell can not be considered to provide effective service, and then the handover is triggered in a delayed manner; if the RSRP and the SNR of the neighbor cells reach the customization threshold, the neighbor cells are considered to provide effective service, and the switching flow is triggered.

In one possible implementation, the terminal is provided with a subscription condition that measures whether the serving cell is capable of providing a valid service, the subscription condition being constituted by an RSRP subscription condition and an SNR subscription condition. Optionally, the terminal determines that the RSRP subscription condition and the SNR subscription condition are met when the serving cell RSRP value of the serving cell reaches a seventh subscription threshold (e.g., -100 dbm) and the serving cell SNR value reaches an eighth subscription threshold (e.g., 10 dB). The seventh custom threshold and the eighth custom threshold may be set empirically by a developer, which is not limited in this embodiment.

2. And in response to the neighbor cell RSRP value reaching a ninth customized threshold and the neighbor cell SNR value reaching a tenth customized threshold, determining that the customized switching condition is met, and triggering the cell switching.

Optionally, the terminal is provided with a subscription condition for measuring whether the neighbor cell can provide a valid service, and the subscription condition is also composed of an RSRP subscription condition and an SNR subscription condition. Optionally, when the RSRP value of the neighboring cell reaches a ninth customized threshold (for example, -60 dbm), and the SNR value of the neighboring cell reaches a tenth customized threshold (for example, 30 dB), it is determined that the customized handover condition is satisfied, and cell handover is triggered; and when the RSRP value of the adjacent cell does not reach the ninth customized threshold value or the SNR value of the adjacent cell does not reach the tenth customized threshold value, determining that the customized switching condition is not met, and delaying triggering switching. The ninth custom threshold and the tenth custom threshold may be set empirically by a developer, which is not limited in this embodiment.

Illustratively, as shown in fig. 11, when the terminal resides in the SA cell and the target neighbor cell is the SA cell, the cell handover procedure may include the following steps:

Step 1101, according to the measurement configuration of the SA serving cell transmitting A3/A4/A5, cell measurement is performed on the SA neighbor cell.

In step 1102, it is detected whether the RSRP of the SA-serving cell is greater than a seventh customized threshold and the SNR is greater than an eighth customized threshold. If yes, go to step 1103, if no, end.

In step 1103, it is detected whether the RSRP of the SA-neighboring cell is smaller than a ninth customized threshold, or whether the SNR is smaller than a tenth customized threshold. If so, executing step 1104; if both are greater than each other, the process ends (cell handover is triggered).

Step 1104, the measurement report is not reported, and the handover is triggered by delay.

Referring to fig. 12, a block diagram of a cell preference apparatus according to an embodiment of the present application is shown. The apparatus may be implemented as all or part of the terminal 13 in fig. 1 by software, hardware or a combination of both. The device comprises:

A determining module 1201, configured to determine an abnormal cell, where the abnormal cell is determined based on a number of occurrence times of cell abnormality, and the number of occurrence times of cell abnormality includes at least one of a number of radio link failures and a number of secondary cell failures;

a preference module 1202, configured to perform cell preference based on the abnormal cell, where the cell preference includes at least one of cell selection preference, cell reselection preference, and cell handover preference.

Optionally, the determining module 1201 includes:

a first determining unit, configured to determine the number of occurrence times of the cell abnormality of the target cell in a first duration;

A second determining unit, configured to determine an abnormality cause in response to the occurrence number of the cell abnormality being greater than a number threshold, where the abnormality cause includes a network configuration abnormality or a coverage abnormality;

A third determining unit configured to determine the target cell as a first abnormal cell in response to the abnormality cause being a coverage abnormality;

And a fourth determining unit configured to determine the target cell as a second abnormal cell in response to the abnormality cause being a network configuration abnormality.

Optionally, the preferential selection module 1202 is specifically configured to:

reducing the cell priority of the first abnormal cell and adding the second abnormal cell to a blacklist, wherein cells in the blacklist are eliminated in the processes of cell selection, cell reselection and cell switching;

And performing cell preference based on the blacklist.

Optionally, when the cell priority of the first abnormal cell is reduced, the preferential module 1202 is configured to:

And reducing the RSRP value of the first abnormal cell based on the target penalty value.

Optionally, the third determining unit is specifically configured to:

Determining the target cell as the first abnormal cell for a second period of time in response to the abnormality being a coverage abnormality;

The fourth determining unit is specifically configured to:

And in response to the abnormality being a network configuration abnormality, determining the target cell as the second abnormal cell within a third time period, the third time period being longer than the second time period.

Optionally, the first determining unit is further configured to determine, again, the number of times of occurrence of the cell abnormality of the target cell in the first duration in response to reaching the second duration;

the fourth determining unit is further configured to determine, in response to the number of occurrence of the cell abnormality being greater than the number threshold, the target cell as the second abnormal cell within the third duration, the abnormality being a coverage abnormality.

Optionally, the fourth determining unit is specifically configured to:

Responding to the occurrence times of the cell abnormality is larger than the time threshold, the abnormality is coverage abnormality, the target cell adopts a first access technology, and the target cell is determined to be the second abnormal cell in a third duration;

the third determining unit is further configured to:

And in response to the occurrence times of the cell anomalies being greater than the time threshold, wherein the anomaly cause is coverage anomalies, and the target cell adopts a second access technology, the target cell is determined to be the first anomaly cell in the second time period, and the evolution of the second access technology is earlier than that of the first access technology.

Optionally, the determining module 1201 further includes:

And a fifth determining module, configured to determine the frequency threshold based on an access technology adopted by the target cell, where the frequency threshold and an evolution sequence of the access technology are in a negative correlation.

Optionally, the preferential selection module 1202 includes:

A sixth determining unit configured to determine a candidate cell based on the abnormal cell;

a first obtaining unit, configured to obtain a minimum access level threshold configured by a network device for the candidate cell;

A seventh determining unit, configured to determine, in response to the candidate cell adopting a third access technology, the minimum access level threshold being smaller than a first customized threshold, the first customized threshold as a cell minimum access level threshold of the candidate cell;

and the selection unit is used for selecting the cell based on the minimum access level threshold of the cell and the cell selection criterion.

Optionally, the preferential selection module 1202 includes:

an eighth determining unit configured to determine a target neighbor cell based on the abnormal cell;

a second obtaining unit, configured to obtain a neighboring cell RSRP value and a neighboring cell SNR value of the target neighboring cell;

And the reselection unit is used for responding to the fact that the RSRP value of the adjacent cell meets the cell reselection criterion, and the SNR value of the adjacent cell reaches a second customized threshold to trigger cell reselection.

Optionally, the preferential selection module 1202 includes:

a ninth determining unit, configured to determine a target neighboring cell based on the abnormal cell;

A third obtaining unit, configured to perform cell measurement based on measurement configuration issued by the network device, to obtain a cell measurement result, where the cell measurement result includes a neighbor cell measurement result of the target neighbor cell and a serving cell measurement result of a serving cell;

And the switching unit is used for switching the cells based on the cell measurement result and the customized switching condition.

Optionally, the serving cell adopts a fourth access technology, the target neighbor cell adopts a fifth access technology, and the evolution of the fourth access technology is earlier than the evolution of the fifth access technology;

the switching unit is used for:

Responding to the neighbor cell RSRP value of the target neighbor cell reaching the configuration threshold of the network equipment, and obtaining the neighbor cell SNR value of the target neighbor cell when the duration reaches the configuration duration;

And responding to the fact that the RSRP value of the adjacent cell reaches a third custom threshold, the SNR value of the adjacent cell reaches a fourth custom threshold, the duration reaches the configuration duration, the fact that custom switching conditions are met is confirmed, cell switching is triggered, and the third custom threshold is higher than the configuration threshold.

Optionally, the serving cell adopts a fifth access technology, the target neighbor cell adopts a fourth access technology, and the evolution of the fourth access technology is earlier than that of the fifth access technology;

the switching unit is used for:

Acquiring a neighbor cell RSRP value and a neighbor cell SNR value of the target neighbor cell in response to the serving cell RSRP value of the serving cell being lower than an RSRP threshold;

And responding to the neighbor cell RSRP value reaching a fifth customization threshold, and the neighbor cell SNR value reaching a sixth customization threshold, determining that a customization switching condition is met, and triggering cell switching, wherein the fifth customization threshold is lower than a configuration threshold of the network equipment.

Optionally, the serving cell and the neighbor cell adopt the same access technology;

the switching unit is used for:

responding to the serving cell RSRP value of the serving cell reaching a seventh customized threshold value, and the serving cell SNR value reaching an eighth customized threshold value, and acquiring the neighbor cell RSRP value and the neighbor cell SNR value of the target neighbor cell;

and in response to the neighbor cell RSRP value reaching a ninth customized threshold and the neighbor cell SNR value reaching a tenth customized threshold, determining that a customized switching condition is met, and triggering cell switching.

Embodiments of the present application also provide a computer readable medium storing at least one instruction that is loaded and executed by a processor to implement the cell preference method described in the above embodiments.

Embodiments of the present application also provide a computer program product storing at least one instruction that is loaded and executed by a processor to implement the cell preference method as described in the above embodiments.

Those skilled in the art will appreciate that in one or more of the examples described above, the functions described in the embodiments of the present application may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, these functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The foregoing description of the preferred embodiments of the present application is not intended to limit the application, but rather, the application is to be construed as limited to the appended claims.

Claims

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

determining the abnormal occurrence times of a target cell in a first time period, wherein the abnormal occurrence times of the cell comprise at least one of radio link failure times and auxiliary cell failure times;

Determining an abnormality cause including a network configuration abnormality or a coverage abnormality in response to the number of cell abnormalities occurring being greater than a number threshold;

determining the target cell as a first abnormal cell for a second period of time in response to the abnormality being a coverage abnormality;

determining the target cell as a second abnormal cell within a third time period in response to the abnormality being a network configuration abnormality, the third time period being longer than the second time period;

And performing cell preference based on the abnormal cells, wherein the cell preference comprises at least one of cell selection preference, cell reselection preference and cell switching preference.

2. The method of claim 1, wherein the cell preference based on the abnormal cell comprises:

And performing cell preference based on the blacklist.

3. The method of claim 2, wherein said reducing the cell priority of the first abnormal cell comprises:

4. The method of claim 1, wherein the determining the target cell as the first abnormal cell within a second time period in response to the abnormality being a coverage abnormality, the method further comprises:

In response to reaching the second duration, determining again the number of occurrences of the cell anomaly for the target cell within the first duration;

And in response to the number of times of occurrence of the cell abnormality being greater than the number of times threshold and the abnormality cause being coverage abnormality, determining the target cell as the second abnormal cell within the third period of time.

5. The method of claim 4, wherein the determining the target cell as the second abnormal cell for the third period of time in response to the number of occurrences of the cell anomaly being greater than the number threshold and the anomaly cause being a coverage anomaly comprises:

The method further comprises the steps of:

6. The method according to claim 1, characterized in that the method further comprises:

And determining the frequency threshold based on the access technology adopted by the target cell, wherein the frequency threshold and the evolution sequence of the access technology are in a negative correlation.

7. The method according to any one of claims 1 to 6, wherein said cell preference based on abnormal cells comprises:

determining candidate cells based on the abnormal cells;

acquiring a minimum access level threshold configured by network equipment for the candidate cell;

Determining the first customized threshold as a cell minimum access level threshold of the candidate cell in response to the candidate cell adopting a third access technology and the minimum access level threshold being smaller than the first customized threshold;

and selecting the cell based on the minimum access level threshold and the cell selection criterion.

8. The method according to any one of claims 1 to 6, wherein said cell preference based on abnormal cells comprises:

determining a target neighbor cell based on the abnormal cell;

acquiring a neighbor cell RSRP value and a neighbor cell SNR value of the target neighbor cell;

and triggering cell reselection in response to the neighbor cell RSRP value meeting a cell reselection criterion and the neighbor cell SNR value reaching a second customized threshold.

9. The method according to any one of claims 1 to 6, wherein said cell preference based on abnormal cells comprises:

determining a target neighbor cell based on the abnormal cell;

cell measurement is carried out based on measurement configuration issued by network equipment, so as to obtain cell measurement results, wherein the cell measurement results comprise neighbor cell measurement results of the target neighbor cell and service cell measurement results of the service cell;

and carrying out cell switching based on the cell measurement result and the customized switching condition.

10. The method of claim 9, wherein the serving cell employs a fourth access technology and the target neighbor cell employs a fifth access technology, the fourth access technology evolving earlier than the fifth access technology;

The cell handover based on the cell measurement result and the customized handover condition includes:

11. The method of claim 9, wherein the serving cell employs a fifth access technology and the target neighbor cell employs a fourth access technology, the fourth access technology evolving earlier than the fifth access technology;

12. The method of claim 9, wherein the serving cell and the neighbor cell employ the same access technology;

13. A cell preference apparatus, the apparatus comprising:

the determining module is used for determining the abnormal occurrence times of the target cell in the first time length, wherein the abnormal occurrence times of the cell comprise at least one of the radio link failure times and the auxiliary cell failure times;

And the preferred module is used for carrying out cell preferred based on the abnormal cells, wherein the cell preferred comprises at least one of cell selection preferred, cell reselection preferred and cell switching preferred.

14. A terminal, the terminal comprising a processor and a memory; the memory stores at least one instruction for execution by the processor to implement the cell preference method of any one of claims 1 to 12.

15. A computer readable storage medium storing at least one instruction for execution by a processor to implement the cell preference method of any one of claims 1 to 12.