CN107155203B

CN107155203B - Cell reselection method, device and computer readable storage medium

Info

Publication number: CN107155203B
Application number: CN201710510862.2A
Authority: CN
Inventors: 刘明辉
Original assignee: Nanjing Zhongchengxie Information Technology Co Ltd
Current assignee: Xiamen Jiupin Sesame Information Technology Co ltd
Priority date: 2017-06-28
Filing date: 2017-06-28
Publication date: 2020-12-18
Anticipated expiration: 2037-06-28
Also published as: CN107155203A

Abstract

The invention discloses a cell reselection method, a device and a computer readable storage medium, wherein the cell reselection method comprises the following steps: when the mobile terminal receives a cell reselection instruction, determining a correction coefficient of each adjacent cell reselection parameter according to a call service record of each adjacent cell of the mobile terminal; correcting the reselection parameters of the adjacent cells into reference reselection parameters based on the correction coefficients; and obtaining effective reselection parameters meeting the reselection criteria of each cell from the reference reselection parameters of each adjacent cell, and determining the adjacent cell corresponding to the effective reselection parameter with the maximum value as the reselected cell. According to the scheme, the reselection parameters of each adjacent cell of the cell where the mobile terminal is located are corrected, and the corrected reselection parameters can reflect the service conditions of each adjacent cell more accurately, so that the cell with a good service condition is selected, and the call service quality of the mobile terminal is improved.

Description

Cell reselection method, device and computer readable storage medium

Technical Field

The present invention relates to the field of mobile terminal technologies, and in particular, to a cell reselection method and apparatus, and a computer-readable storage medium.

Background

With the development of communication technology, the popularity of mobile terminals is becoming more and more widespread, the number of users thereof is increasing year by year, and the functions provided by the mobile terminals are becoming more and more colorful, but the conversation is still one of the most important basic functions. Due to the complexity of the mobile communication system and the uncertainty of the wireless communication environment, the situation of the available call services of a plurality of cells covering the same location may vary due to interference, system failure, unbalanced load amount, and the like.

These cells may both satisfy the access conditions of the mobile terminal if measured from only two metrics, conventional signal strength and signal quality. However, the two indexes can only ensure the availability of the wireless link between the mobile terminal and the base station, and cannot reflect the load of the call service of the base station and the stability of the call service, so that the mobile terminal may access a cell with a poor service condition, and the call service of the mobile terminal is affected.

Disclosure of Invention

The invention mainly aims to provide a cell reselection method, a cell reselection device and a computer readable storage medium, and aims to solve the problem that a mobile terminal in the prior art is accessed to a cell with poor service condition to influence call service.

In order to achieve the above object, the present invention provides a cell reselection method, including the following steps:

when the mobile terminal receives a cell reselection instruction, determining a correction coefficient of each adjacent cell reselection parameter according to a call service record of each adjacent cell of the mobile terminal;

correcting the reselection parameters of the adjacent cells into reference reselection parameters based on the correction coefficients;

and obtaining effective reselection parameters meeting the reselection criteria of each cell from the reference reselection parameters of each adjacent cell, and determining the adjacent cell corresponding to the effective reselection parameter with the maximum value as the reselected cell.

Optionally, when the mobile terminal receives the cell reselection instruction, the step of determining the correction coefficient of the reselection parameter of each neighboring cell according to the call service record of each neighboring cell of the mobile terminal includes:

when the mobile terminal receives a cell reselection instruction, acquiring the call failure times of each adjacent cell and the call failure time corresponding to each call failure within preset time of the mobile terminal;

and determining a correction coefficient of the reselection parameters of each adjacent cell based on the call failure times, the call failure time and the preset time.

Optionally, when the mobile terminal receives the cell reselection instruction, the step of obtaining the call failure times of each neighboring cell and the call failure time corresponding to each call failure within the preset time of the mobile terminal includes:

when the mobile terminal fails in conversation, recording the time of the failed conversation and the cell where the mobile terminal is located when the conversation fails;

and saving the call failure time into a corresponding cell list.

Optionally, the step of correcting the reselection parameters of the neighboring cells to reference reselection parameters based on the correction coefficients includes:

and acquiring reselection parameters of adjacent cells, calculating the difference between the reselection parameters and the correction coefficients, and taking the difference as a reference reselection parameter.

Optionally, the step of obtaining effective reselection parameters meeting the cell reselection criterion from the reference reselection parameters of the neighboring cells includes:

determining the current parameters of the current service cell where the mobile terminal is located, and judging the numerical value size relationship between the current parameters and the reference reselection parameters;

and when the numerical value of the reference reselection parameter is larger than the numerical value of the current parameter, judging that the reference reselection parameter is an effective reselection parameter meeting a cell reselection criterion, and acquiring the effective reselection parameter.

Optionally, the step of determining the neighboring cell corresponding to the largest value of the valid reselection parameters as the reselected cell includes:

sequencing the effective reselection parameters, and acquiring the effective reselection parameter with the largest value in the sequencing;

and determining the adjacent cell corresponding to the effective reselection parameter with the largest value, and taking the adjacent cell as the reselected cell.

Optionally, the step of sorting the effective reselection parameters and obtaining the largest effective reselection parameter in the sorting includes:

arranging the numerical values of the effective reselection parameters in a descending order, and acquiring the effective reselection parameter arranged at the first position in the arrangement order;

or, the values of the effective reselection parameters are arranged in a descending order, and the effective reselection parameter arranged at the last position in the arrangement order is obtained.

and accessing the mobile terminal to the reselected cell and initiating a call request.

In addition, to achieve the above object, the present invention further provides a cell reselection apparatus, including: a memory, a processor, a communication bus, and a cell reselection program stored on the memory:

the communication bus is used for realizing connection communication between the processor and the memory;

the processor is configured to execute the cell reselection procedure to implement the following steps:

Further, to achieve the above object, the present invention also provides a computer-readable storage medium storing one or more programs, the one or more programs being executable by one or more processors for:

According to the cell reselection method, when a mobile terminal receives a cell reselection instruction, correction coefficients of reselection parameters of adjacent cells are determined according to call service records of the adjacent cells of the mobile terminal, the reselection parameters are corrected by using the correction coefficients, reference reselection parameters are obtained, effective reselection parameters meeting cell reselection criteria in the reference reselection parameters are obtained, and then the adjacent cell corresponding to the effective reselection parameters with the largest numerical value is determined as a reselected cell. According to the scheme, the reselection parameters of each adjacent cell of the mobile terminal are corrected, and the corrected reselection parameters can more accurately reflect the service condition of each adjacent cell, so that the cell with good service condition is selected, and the call service quality of the mobile terminal is improved.

Drawings

Fig. 1 is a schematic diagram of a hardware structure of an alternative mobile terminal for implementing various embodiments of the present invention;

FIG. 2 is a diagram illustrating a wireless communication system of the mobile terminal shown in FIG. 1;

fig. 3 is a flowchart illustrating a cell reselection method according to a first embodiment of the present invention;

fig. 4 is a flowchart illustrating a cell reselection method according to a second embodiment of the present invention;

fig. 5 is a schematic block diagram illustrating a cell reselection method according to the present invention;

fig. 6 is a schematic diagram illustrating a first scenario of a cell reselection method according to the present invention;

fig. 7 is a schematic device structure diagram of a hardware operating environment related to the method according to the embodiment of the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.

The terminal may be implemented in various forms. For example, the terminal described in the present invention may include a mobile terminal such as a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and the like, and a fixed terminal such as a Digital TV, a desktop computer, and the like.

The following description will be given by way of example of a mobile terminal, and it will be understood by those skilled in the art that the construction according to the embodiment of the present invention can be applied to a fixed type terminal, in addition to elements particularly used for mobile purposes.

Referring to fig. 1, which is a schematic diagram of a hardware structure of a mobile terminal for implementing various embodiments of the present invention, the mobile terminal 100 may include: RF (Radio Frequency) unit 101, WiFi module 102, audio output unit 103, a/V (audio/video) input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 1 is not intended to be limiting of mobile terminals, which may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The following describes each component of the mobile terminal in detail with reference to fig. 1:

the radio frequency unit 101 may be configured to receive and transmit signals during information transmission and reception or during a call, and specifically, receive downlink information of a base station and then process the downlink information to the processor 110; in addition, the uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for Mobile communications), GPRS (General Packet Radio Service), CDMA2000(Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division duplex Long Term Evolution), and TDD-LTE (Time Division duplex Long Term Evolution).

WiFi belongs to short-distance wireless transmission technology, and the mobile terminal can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 102, and provides wireless broadband internet access for the user. Although fig. 1 shows the WiFi module 102, it is understood that it does not belong to the essential constitution of the mobile terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.

The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the mobile terminal 100 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, and the like.

The a/V input unit 104 is used to receive audio or video signals. The a/V input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, the Graphics processor 1041 Processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 may receive sounds (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, or the like, and may be capable of processing such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.

The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or a backlight when the mobile terminal 100 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.

The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Specifically, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect a touch operation performed by a user on or near the touch panel 1071 (e.g., an operation performed by the user on or near the touch panel 1071 using a finger, a stylus, or any other suitable object or accessory), and drive a corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and can receive and execute commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. In particular, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like, and are not limited to these specific examples.

Further, the touch panel 1071 may cover the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although the touch panel 1071 and the display panel 1061 are shown in fig. 1 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the mobile terminal, and is not limited herein.

The interface unit 108 serves as an interface through which at least one external device is connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and external devices.

The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 110 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.

The mobile terminal 100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and preferably, the power supply 111 may be logically connected to the processor 110 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system.

Although not shown in fig. 1, the mobile terminal 100 may further include a bluetooth module or the like, which is not described in detail herein.

In order to facilitate understanding of the embodiments of the present invention, a communication network system on which the mobile terminal of the present invention is based is described below.

Referring to fig. 2, fig. 2 is an architecture diagram of a communication Network system according to an embodiment of the present invention, where the communication Network system is an LTE system of a universal mobile telecommunications technology, and the LTE system includes a UE (User Equipment) 201, an E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, an EPC (Evolved Packet Core) 203, and an IP service 204 of an operator, which are in communication connection in sequence.

Specifically, the UE201 may be the terminal 100 described above, and is not described herein again.

The E-UTRAN202 includes eNodeB2021 and other eNodeBs 2022, among others. Among them, the eNodeB2021 may be connected with other eNodeB2022 through backhaul (e.g., X2 interface), the eNodeB2021 is connected to the EPC203, and the eNodeB2021 may provide the UE201 access to the EPC 203.

The EPC203 may include an MME (Mobility Management Entity) 2031, an HSS (Home Subscriber Server) 2032, other MMEs 2033, an SGW (Serving gateway) 2034, a PGW (PDN gateway) 2035, and a PCRF (Policy and Charging Rules Function) 2036, and the like. The MME2031 is a control node that handles signaling between the UE201 and the EPC203, and provides bearer and connection management. HSS2032 is used to provide registers to manage functions such as home location register (not shown) and holds subscriber specific information about service characteristics, data rates, etc. All user data may be sent through SGW2034, PGW2035 may provide IP address assignment for UE201 and other functions, and PCRF2036 is a policy and charging control policy decision point for traffic data flow and IP bearer resources, which selects and provides available policy and charging control decisions for a policy and charging enforcement function (not shown).

The IP services 204 may include the internet, intranets, IMS (IP Multimedia Subsystem), or other IP services, among others.

Although the LTE system is described as an example, it should be understood by those skilled in the art that the present invention is not limited to the LTE system, but may also be applied to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, and future new network systems.

Based on the hardware structure of the mobile terminal and the structure of the communication device, the embodiments of the cell reselection method are provided.

Referring to fig. 3, the present invention provides a cell reselection method, in a first embodiment of the cell reselection method, the cell reselection method includes:

step S10, when the mobile terminal receives the cell reselection instruction, determining the correction coefficient of each neighboring cell reselection parameter according to the call service record of each neighboring cell of the mobile terminal;

in the field of communications, the PLMN (Public Land Mobile Network), a Network established and operated by the government or its approved operator for the purpose of providing Land Mobile services to the Public. The PLMN consists of MCC and MNC, wherein the MCC is a Mobile Country Code (Mobile Country Code), the resources of the MCC are uniformly distributed and managed by International Telecommunication Union (ITU), the Country to which the Mobile subscriber belongs is uniquely identified, the number of the countries is 3, and the number of the countries is 460; MNC is Mobile Network Code (Mobile Network Code) with 2 bits in total, and is used by a china Mobile TD system 00, a china unicom GSM system 01, a china Mobile GSM system 02 and a china telecommunication CDMA system 03. Thus, the PLMN of China Mobile is 46000 or 46002, the PLMN of China Unicom is 46001, and the PLMN of China telecom is 46003. The mobile terminal must be accessed to the PLMN to implement the communication function. The mobile terminal first selects a PLMN and once the PLMN is selected, the mobile terminal will use the initial cell selection or stored information cell selection procedure to find a suitable cell to camp on to use the services provided by the cell while listening to the control channel of the cell.

Generally, the states of a mobile terminal are classified into 3 types: 1. in the idle state, the power supply of the mobile terminal is not turned on; 2. an idle mode in which a power source of the mobile terminal has been turned on and has resided in a cell but has not yet a call or data transmission service; 3. and in a connection mode, the mobile terminal is in a state of conversation or data transmission service. In the idle mode, the mobile terminal listens to the neighboring cells for power measurement, paging response, calling and location updating, and performs cell reselection according to the measured values and cell reselection antenna parameters calculated by received broadcast system messages so as to reside in a cell with higher priority and better channel quality, so that the cell can better provide service for the mobile terminal. The serving cell refers to a cell in which the mobile phone is camping, and the neighboring cells are cells that are candidates for serving cells. When the downlink signal link of the mobile terminal fails or the current serving cell becomes blocked, the mobile terminal starts cell reselection. During reselection, the reselection is performed according to parameters such as a measured value of a received signal instruction of an adjacent cell, a measured value of a received signal instruction of a serving cell, and the like. Referring to fig. 6, a serving cell where the mobile terminal currently resides is a certain cell, and the serving cell has a plurality of neighboring cells, where a neighboring cell that cannot be accessed as the mobile terminal is a non-neighboring cell, and a neighboring cell that can be accessed as the mobile terminal is a neighboring cell, and the neighboring cells at least satisfy the following conditions: (1) the mobile terminal can receive broadcast signals from the network in which the cell is located; (2) if the mobile terminal user wants to make a call, it can successfully access the system; (3) the mobile terminal user can receive pages from other users of the network in that cell. Specifically, after determining the serving cell in which the mobile terminal is located, the network may issue an accessible neighboring cell name list to the mobile terminal, so as to determine the neighboring cell accessible to the mobile terminal. After the adjacent cells are determined, the communication service quality which can be provided is different due to the environmental difference of different adjacent cells, and the correction coefficient of the reselection parameter of each adjacent cell is determined according to the call service record of each adjacent cell of the mobile terminal, wherein the call service record can represent the parameter representation of the communication service quality such as the call failure times, the call interruption times and the like. After the correction coefficients are determined, the reselection parameters of the neighboring cells are respectively corrected by using the correction coefficients corresponding to the neighboring cells, so that the reselection parameters can more accurately represent the communication quality of the neighboring cells, and the neighboring cells with better channel quality can be selected.

Step S20, based on the correction coefficient, correcting the reselection parameters of each neighboring cell to be reference reselection parameters;

further, after determining the correction coefficients of the reselection parameters of all neighboring cells neighboring the serving cell where the mobile terminal is located, the reselection parameters of the corresponding neighboring cells are corrected according to the correction coefficients of different neighboring cells, and the reselection parameters are corrected into reselection correction coefficients. The correction coefficient is calculated by the historical data of the previous call failure of the mobile terminal of each adjacent cell, so that the frequency of the historical call failure of each adjacent cell, namely the communication quality can be represented, the reselection parameter is corrected by using the correction coefficient, the communication quality of each adjacent cell can be represented more accurately by using the reselection parameter, and the probability of selecting the adjacent cell with better channel quality from each adjacent cell is increased. The correction mode can be to multiply the reselection parameter and the correction coefficient, or to subtract the reselection parameter and the correction coefficient, so as to represent the current communication quality through the previous call failure frequency of each neighboring cell. When the multiplication operation is adopted, the value of the correction coefficient is less than or equal to 1, when the terminal never has the call failure in a certain cell, the correction coefficient can be represented by 1, and when the call failure occurs, the correction coefficient is less than 1 to represent that the adjacent cell has the call failure in combination with the historical parameters, so that the current call quality is less than the reselection parameters obtained by calculation. Understandably, when the call failure times of the adjacent cell are more, the historical call quality of the adjacent cell is worse, so that when the correction mode is multiplication operation, the correction coefficient is smaller, the reselection parameter is corrected to be the reference reselection parameter, and the call quality of the adjacent cell is poor; when the correction mode is subtraction operation, the larger the correction coefficient is, the smaller the reselection parameter is corrected to be the reference reselection parameter correspondingly, and the poor call quality of the adjacent cell is represented.

Step S30, obtaining effective reselection parameters meeting the cell reselection criteria from the reference reselection parameters of the neighboring cells, and determining the neighboring cell corresponding to the effective reselection parameter with the largest value as the reselected cell.

Further, after the reselection parameters are corrected to the reference reselection parameters by using the correction coefficients, due to the difference of the reference reselection parameters, the communication quality provided by the neighboring cells may be inferior to the communication quality provided by the current serving cell of the mobile terminal, and if such neighboring cells are regarded as the camping cells of the mobile terminal, the communication service of the mobile terminal is reduced, so such neighboring cells with inferior communication quality to the current serving cell should be excluded. In this embodiment, a cell reselection criterion is set, and effective reselection parameters are selected from the reference reselection parameters of neighboring cells according to the cell reselection criterion, and the communication quality that can be provided by the neighboring cell corresponding to the selected effective reselection parameters can be better than the communication quality that can be provided by the serving cell where the mobile terminal is located, so as to exclude the neighboring cell whose communication quality is worse than the communication quality of the current serving cell. After selecting effective reselection parameters with communication quality better than that of the currently serving cell from the reference reselection parameters of the neighboring cells, an optimal cell needs to be determined as a reselection cell from the effective reselection parameters. Specifically, the largest effective reselection parameter among the effective reselection parameters is selected, and the neighboring cell having the effective reselection parameter is used as the reselection cell. If only one reselection correction value is available, the neighboring cell corresponding to the reselection correction value is directly used as the reselected cell. Or, if there is no effective reselection parameter meeting the cell reselection criterion in the reference reselection parameters, it indicates that the communication quality of the neighboring cell of the serving cell where the mobile terminal is located is not better than that of the current serving cell, and then the current serving cell is continued to be dropped as the residence of the mobile terminal, and reselection is not performed. To ensure that the mobile terminal is provided with relatively optimal communication quality, thereby guaranteeing the call service of the mobile terminal.

Further, in another embodiment of the cell reselection method of the present invention, when the mobile terminal receives a cell reselection instruction, the step of determining the correction coefficient of the reselection parameter of each neighboring cell according to the call service record of each neighboring cell of the mobile terminal includes:

step S11, when the mobile terminal receives the cell reselection instruction, acquiring the call failure times of each neighboring cell and the call failure time corresponding to each call failure within the preset time of the mobile terminal;

step S12, determining a correction coefficient of the reselection parameter of each neighboring cell based on the call failure times, the call failure time, and the preset time.

Further, when the communication quality provided by the serving cell where the mobile terminal is located is poor and the call service of the mobile terminal is poor, the mobile terminal may reselect the neighboring cell as a new camping cell. Wherein the triggering of the reselection instruction may be: the mobile terminal cannot receive broadcast signals from the network where the current serving cell is located, or the mobile terminal cannot successfully access the system, or the mobile terminal cannot receive pages of other users of the network in the serving cell, and the like. When the mobile terminal receives the cell reselection instruction, the call failure times of each adjacent cell and the call time corresponding to each call failure in the preset time of the mobile terminal are obtained. Understandably, the cell communication quality is influenced by its own factors and the surrounding environment, such as the number of mobile terminals accessing the cell and surrounding obstacles. As time changes, these factors may also change, for example, the number of mobile terminals accessing the cell decreases, surrounding obstacles may be removed, and the like, so that the communication quality of the cell is improved, the number of times of call failures of the mobile terminal is reduced, and the number of times of call failures of the mobile terminal is also improved, so that the number of times of call failures of the mobile terminal is increased. Therefore, the present embodiment presets a preset time, and obtains the number of times of call failure of the mobile terminal in each neighboring cell and the corresponding call failure time within the preset time, and the duration of the preset time should be within a reasonable range. If the time setting is too long, the cell is possibly changed by the external environment, and the communication quality before the long time cannot reflect the current communication quality; and the time setting is too short, and the communication quality of the cell cannot be fully reflected.

And determining a correction coefficient of the reselection parameters of each adjacent cell according to the call failure times of each cell within the preset time and the corresponding call failure time and by combining the current time. Specifically, the correction coefficient is determined as shown in formula (1):

wherein n is the preset time delta between the adjacent cell and the ith adjacent cell_tNumber of internal call failures, Δ_RThe correction quantity of the reselection parameter is represented by a preset empirical value t_cRepresenting the current time, t_kTime of failure of the kth call, Δ_tIs a preset time.

Delta in the formula (1)_RFor a preset empirical value, (t)_c-Δ_t) A timing starting time point for determining the preset time is t if the current time is 10 points and the preset time is 30 minutes_c-Δ_tThe preset time point may be determined to be 9 points 30. And t is_k-(t_c-Δ_t) Indicating that the time at which the kth call failure occurs is closer to the current time point, and the farther from the current time, i.e., closer to the starting time point, the t is set to_k-(t_c-Δ_t) The smaller the value, e.g., when the time of the k-th call failure is 9: 40, the value obtained by subtracting 9: 30 is 10, and when the time of the failure is 9: 35, the value obtained is 5. Further, the smaller the value of the correction coefficient obtained by the calculation of the formula (1); conversely, the closer to the current time, the closer t_k-(t_c-Δ_t) The larger the value, the larger the value of the correction coefficient obtained by the calculation of the formula (1). In addition, the influence of all call failure times occurring in the preset time on the current call quality of the cell is accumulated, and when the call failure times are more, the accumulated value is larger, namely the influence on the current call quality of the cell is influencedThe louder the sound. In this embodiment, according to the number of call failures of different neighboring cells and the corresponding call failure time, the correction coefficient is calculated by using the calculation formula (1) and is used as the probability of call failure occurring in the neighboring cell to correct the reselection parameter, but the reselection parameter is more accurate, and the probability of selecting the neighboring cell with good call quality is improved.

Further, in another embodiment of the cell reselection method of the present invention, the step of obtaining, when the mobile terminal receives the cell reselection instruction, the number of call failures of each neighboring cell and the call failure time corresponding to each call failure in a preset time of the mobile terminal includes:

step S13, when the mobile terminal fails to communicate, recording the time of the failed communication and the cell where the mobile terminal is located when the communication fails;

and step S14, storing the call failure time in a corresponding cell list.

Understandably, in order to obtain the call failure times of each neighboring cell and the corresponding call failure time, when the mobile terminal fails to call, the call failure condition needs to be recorded and stored. Specifically, a cell list of each cell is set in the mobile terminal, and when the mobile terminal fails to communicate in the current service cell, the time of the failure to communicate and the current service cell are recorded; and stores the record in the cell list corresponding to the serving cell. If the current cell of the mobile terminal is A and the neighboring cells have B, C, the cell list comprises A, B, C, when the current cell A has a call failure, the call failure time is recorded in the cell list of the cell A, after one hour, the call failure occurs again, and the call failure time is continuously reduced and recorded in the cell list of the cell A; and then reselecting the serving cell from the cell A to the cell C, and recording the call failure time in a cell list of the cell C when the call failure occurs in the cell C. When a cell reselection instruction is received to perform cell reselection, data stored in a cell list of each adjacent cell is acquired from the mobile terminal so as to calculate a correction coefficient of each cell, and therefore reselection parameters are corrected.

Further, in another embodiment of the cell reselection method of the present invention, the step of correcting the reselection parameters of the neighboring cells to be reference reselection parameters based on the correction coefficients includes:

Further, after determining the correction coefficient of each neighboring cell, the reselection parameter of each neighboring cell is corrected, specifically, the reselection parameter of each neighboring cell is determined first, where the determination manner is calculated by formula (2):

R_n＝Q_{meas_n}-Q_{offset_n} (2)

wherein Q is_{meas_n}Receiving signal quality measurements, Q, for neighboring cells_{offset_n}The difference value of the received signal quality requirements of the adjacent cell and the service cell is sent to the mobile terminal by the network.

After the reselection parameters for each neighboring cell are determined by equation (2), the reselection parameters are corrected. Specifically, the present embodiment adopts a way of subtracting the two to calculate the difference, as shown in formula (3):

R_i'＝R_i-Δ_Ri (3)

wherein R is_i' for reselection correction factor, when the number of call failures occurred in the neighboring cell within a preset time is too large, the correction factor Δ_RiThe value is correspondingly larger, thereby enabling R_i' value is smaller; correspondingly, when the adjacent cell has less call failure times within the preset time, the correction coefficient delta is corrected_RiThe value is correspondingly smaller, thereby enabling R_iThe' value is larger. Therefore, the reselection parameters are corrected into the reference reselection parameters through the correction coefficients, and the reference reselection parameters can represent the communication quality of each adjacent cell more accurately.

Further, in another embodiment of the cell reselection method of the present invention, the step of obtaining effective reselection parameters meeting the cell reselection criterion from the reference reselection parameters of the neighboring cells includes:

step S31, determining the current parameter of the current service cell where the mobile terminal is located, and judging the numerical value relationship between the current parameter and the reference reselection parameter;

step S32, when the value of the reference reselection parameter is greater than the value of the current parameter, determining that the reference reselection parameter is an effective reselection parameter meeting the cell reselection criterion, and acquiring the effective reselection parameter.

After the reselection parameters of the neighboring cell are corrected to the reference reselection parameters, the reference reselection parameters of the neighboring cell having a communication quality better than that of the current serving cell need to be selected from the reference reselection parameters, and the reference reselection parameters are used as effective reselection parameters. The reselection criterion is set in the scheme and is used for selecting the optimal reselection parameter with the value larger than the current parameter value of the current service cell from the reference reselection parameters of the adjacent cells. Firstly, determining the current parameters of the current service cell of the mobile terminal, wherein the determination mode is calculated by formula (4):

R_s＝Q_{meas_s}+Q_hysts (4)

wherein Q is_{meas_n}Receiving signal quality measurements, Q, for a current cell_{offset_n}Cell reselection hysteresis.

After determining the current parameter of the current serving cell where the mobile terminal is located through the formula (4), the correction coefficient of the current serving cell can be obtained through the above method for obtaining the correction coefficient, and the current parameter is corrected, so that the current parameter is more accurate. And judging the magnitude relation between the corrected current parameter value and the reference reselection parameter value, when the value of the reference reselection parameter is greater than the value of the current parameter, indicating that the communication quality of the adjacent cell corresponding to the reference reselection parameter is superior to the communication quality of the current serving cell corresponding to the current parameter and meets the requirement of a cell reselection criterion, taking the reference reselection parameter as an effective reselection parameter, acquiring all effective reselection parameters meeting the cell reselection criterion, and sequencing all effective reselection parameters to determine the corresponding reselection cell. Wherein determining to reselect a cell based on the ranking comprises:

step S33, the effective reselection parameters are sequenced, and the effective reselection parameter with the largest value in the sequencing is obtained;

step S34, determining a neighboring cell corresponding to the largest value of the valid reselection parameters, and using the neighboring cell as a reselected cell.

And sequencing all the obtained effective reselection parameters, and obtaining the effective reselection parameter with the largest value in sequencing, so that the adjacent cell corresponding to the effective reselection parameter with the largest value can be determined, and the cell is taken as a reselection cell. The step of ranking the effective reselection parameters and obtaining the effective reselection parameter with the largest value in the ranking comprises the following steps:

step q1, arranging the values of the effective reselection parameters in a descending order, and acquiring the effective reselection parameter arranged at the first position in the arrangement order;

step q2, or, arranging the values of the effective reselection parameters in a descending order, and obtaining the effective reselection parameter arranged at the last position in the arrangement order.

Understandably, the sorting mode can be from large to small in the value of the effective reselection parameter, and can also be from small to large in the value. And when the sorting is in the order from large to small according to the numerical value, acquiring the effective reselection parameter ranked at the first position in the ranking order, and determining the adjacent cell corresponding to the effective reselection parameter ranked at the first position as the reselection cell. And when the sorting is in the order from small to large according to the numerical value, acquiring the effective reselection parameter ranked at the last position in the sorting order, and determining the adjacent cell corresponding to the effective reselection parameter ranked at the last position as the reselection cell. The effective reselection parameter ranked at the first or last position is the effective reselection parameter with the largest value in the ranking, namely, the adjacent cell corresponding to the maximum value of the effective reselection parameter is taken as the reselection cell, the communication quality of the cell corresponding to the maximum value of the effective reselection parameter is good, and the communication service can be better provided.

Further, referring to fig. 4, a second embodiment of the cell reselection method is proposed based on the first embodiment of the cell reselection method of the present invention, and in the second embodiment, the step of determining the neighboring cell corresponding to the valid reselection parameter with the largest value as the reselected cell includes:

and step S40, accessing the mobile terminal to the reselected cell and initiating a call request.

According to the scheme, after the cell reselection is determined, the mobile terminal is accessed to the cell reselection, and a call request is initiated. Specifically, after determining the reselected cell, the determined reselected cell is used as a current serving cell of the mobile terminal, and the mobile terminal is accessed to the reselected cell for camping. The reselected cell provides better communication quality for the mobile terminal, and improves the communication service of the mobile terminal.

Referring to fig. 5, in an embodiment of the present invention, to implement the cell reselection method, the present invention further relates to a cell reselection device, where the cell reselection device includes a call module, a search module, an access module, a parameter adjustment module, and a sorting module. The call module is used for initiating a call request to a mobile network and providing call service for a user; the searching module is used for searching the available cells covering the current position and meeting the access conditions and providing the required cell information for the access module; the access module is used for accessing a designated service cell and providing wireless link communication support for the call module; the parameter adjusting module is used for correcting the reselection parameters into reference reselection parameters according to the correction coefficients; the sorting module is used for sorting the effective reselection parameters.

Referring to fig. 7, fig. 7 is a schematic device structure diagram of a hardware operating environment related to a method according to an embodiment of the present invention.

The cell reselection device in the embodiment of the present invention may be a mobile terminal device having a display function, such as a smart phone, a tablet computer, an e-book reader, an MP3(Moving Picture Experts Group Audio Layer III, motion video Experts compression standard Audio Layer 3) player, an MP4(Moving Picture Experts Group Audio Layer IV, motion video Experts compression standard Audio Layer 3) player, a portable computer, or the like.

As shown in fig. 7, the cell reselection apparatus may include: a processor 110, such as a CPU, a memory 109, and a communication bus 1002. Wherein the communication bus 1002 is used for implementing connection communication between the processor 110 and the memory 109. The memory 109 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). The memory 109 may alternatively be a storage device separate from the processor 110 described above.

Optionally, the cell reselection device may further include a user interface, a network interface, a camera, a Radio Frequency (RF) circuit, a sensor, an audio circuit, a WiFi module, and the like. The user interface may comprise a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface may also comprise a standard wired interface, a wireless interface. The network interface may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface).

It will be appreciated by those skilled in the art that the cell reselection device structure shown in figure 7 does not constitute a limitation of the cell reselection device and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.

As shown in fig. 7, a memory 1005, which is one type of computer storage medium, may include an operating system, a network communication module, and a cell reselection program. The operating system is a program that manages and controls the cell reselection device hardware and software resources, supporting the operation of the cell reselection program as well as other software and/or programs. The network communication module is used to implement communication between the components inside the memory 1005 and with other hardware and software in the cell reselection device.

In the cell reselection apparatus shown in fig. 7, the processor 1001 is configured to execute a cell reselection program stored in the memory 1005, and implement the following steps:

and obtaining effective reselection parameters meeting the cell reselection criterion from the reference reselection parameters of the adjacent cells, and determining the adjacent cell corresponding to the effective reselection parameter with the maximum value as a reselection cell.

Further, when the mobile terminal receives the cell reselection instruction, the step of determining the correction coefficient of each neighboring cell reselection parameter according to the call service record of each neighboring cell of the mobile terminal includes:

Further, the step of acquiring the call failure times of each neighboring cell and the call failure time corresponding to each call failure within the preset time of the mobile terminal when the mobile terminal receives the cell reselection instruction includes:

and saving the call failure time into a corresponding cell list.

Further, the step of correcting the reselection parameters of the neighboring cells to reference reselection parameters based on the correction coefficients comprises:

Further, the step of obtaining effective reselection parameters meeting the cell reselection criterion from the reference reselection parameters of the neighboring cells comprises:

Further, the step of determining the neighboring cell corresponding to the largest value of the valid reselection parameters as the reselected cell includes:

Further, the step of ranking the effective reselection parameters and obtaining the largest effective reselection parameter in the ranking includes:

Further, after determining the neighboring cell corresponding to the largest value of the valid reselection parameters as the reselected cell, the processor 1001 is configured to execute a cell reselection procedure stored in the memory 1005, and implement the following steps:

The specific implementation of the cell reselection apparatus of the present invention is substantially the same as that of the above-mentioned cell reselection method, and is not described herein again.

The present invention provides a computer readable storage medium storing one or more programs, the one or more programs further executable by one or more processors for:

and saving the call failure time into a corresponding cell list.

Further, the step of obtaining effective reselection parameters meeting the cell reselection criteria from the reference reselection parameters of the neighboring cells comprises:

Further, after determining the neighboring cell corresponding to the largest value of the valid reselection parameters as the reselected cell, the one or more programs may be further executable by the one or more processors for:

The specific implementation of the computer-readable storage medium of the present invention is substantially the same as the embodiments of the cell reselection method described above, and is not described herein again.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A cell reselection method, characterized in that the cell reselection method comprises the steps of:

obtaining effective reselection parameters meeting cell reselection criteria from the reference reselection parameters of all the adjacent cells, and determining the adjacent cell corresponding to the effective reselection parameter with the maximum value as a reselection cell;

when the mobile terminal receives a cell reselection instruction, the step of determining the correction coefficient of each neighboring cell reselection parameter according to the call service record of each neighboring cell of the mobile terminal includes:

determining a correction coefficient of reselection parameters of each adjacent cell based on the call failure times, the call failure time and preset time;

based on the call failure times, the call failure time and the preset time, determining a formula of a correction coefficient of a reselection parameter of each neighboring cell as follows:

wherein n is the preset time delta between the adjacent cell and the ith adjacent cell_tNumber of internal call failures, Δ_RRepresenting the correction of the reselection parameter, t, in a single failure_cRepresenting the current time, t_kTime of failure of the kth call, Δ_tIs a preset time.

2. The cell reselection method of claim 1, wherein the step of obtaining, when the mobile terminal receives the cell reselection instruction, the number of call failures of each neighboring cell and the call failure time corresponding to each call failure within a preset time of the mobile terminal comprises:

and saving the call failure time into a corresponding cell list.

3. The cell reselection method of claim 1, wherein the step of modifying the reselection parameters of the neighboring cells to reference reselection parameters based on the modification coefficients comprises:

4. The cell reselection method of claim 1, wherein the step of obtaining valid reselection parameters meeting cell reselection criteria from the reference reselection parameters of neighboring cells comprises:

5. The cell reselection method of any of claims 1 to 4, wherein said step of determining the neighboring cell corresponding to the largest value of the valid reselection parameters as the reselected cell comprises:

6. The cell reselection method of claim 5, wherein the step of ranking the valid reselection parameters and obtaining the largest value valid reselection parameter in the ranking comprises:

7. The cell reselection method of any of claims 1-4, wherein said step of determining the neighboring cell corresponding to the largest value of said valid reselection parameter as the reselected cell comprises:

8. A cell reselection apparatus, wherein the cell reselection apparatus comprises: a memory, a processor, a communication bus, and a cell reselection program stored on the memory:

the processor is configured to execute the cell reselection procedure to implement the steps of the cell reselection method according to any of claims 1-7.

9. A computer readable storage medium, having stored thereon a cell reselection program which, when executed by a processor, implements the steps of the cell reselection method according to any of claims 1-7.