CN114125974A - Cell selection method, device, terminal and storage medium - Google Patents

Cell selection method, device, terminal and storage medium Download PDF

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Publication number
CN114125974A
CN114125974A CN202111466493.4A CN202111466493A CN114125974A CN 114125974 A CN114125974 A CN 114125974A CN 202111466493 A CN202111466493 A CN 202111466493A CN 114125974 A CN114125974 A CN 114125974A
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China
Prior art keywords
cell
network
current
downlink rate
terminal
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CN202111466493.4A
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Chinese (zh)
Inventor
黄江涛
陈志刚
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Priority to CN202111466493.4A priority Critical patent/CN114125974A/en
Publication of CN114125974A publication Critical patent/CN114125974A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/08Reselecting an access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/16Performing reselection for specific purposes
    • H04W36/165Performing reselection for specific purposes for reducing network power consumption
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/24Reselection being triggered by specific parameters
    • H04W36/30Reselection being triggered by specific parameters by measured or perceived connection quality data
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/24Reselection being triggered by specific parameters
    • H04W36/32Reselection being triggered by specific parameters by location or mobility data, e.g. speed data

Abstract

The embodiment of the application discloses a cell selection method, a cell selection device, a cell selection terminal and a cell selection storage medium, and belongs to the technical field of communication. The method comprises the following steps: acquiring a current downlink rate and a current application scene through an AP; responding to the situation that the current downlink rate does not meet the network access condition corresponding to the current application scene, and sending a cell switching instruction to the BP through the AP; and switching the resident cell through the BP based on the cell switching instruction. On the basis of cell selection and residence through the BP, a mechanism for assisting the BP to perform cell selection by the AP is provided, the terminal can be prevented from residing in a cell with good signal quality but low actual downlink rate for a long time, network access conditions are determined based on a specific application scene, whether resident cells need to be switched or not can be judged based on actual network requirements of users, and the network access requirements of the users are guaranteed.

Description

Cell selection method, device, terminal and storage medium
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a cell selection method, an apparatus, a terminal, and a storage medium.
Background
According to the third Generation partnership project (3)rdProtocol of Generation Partnership Project, 3GPP) protocolSpecifically, a Baseband Processor (BP) of the terminal selects a cell to camp on based on signal quality to provide mobile data service.
In the related art, the BP of the terminal monitors the signal quality (e.g., signal strength) of each cell, and automatically selects the cell with the highest signal quality for camping. When a user accesses a network by using a terminal, the data volume of downlink data is much larger than that of uplink data, so the transmission rate of the downlink data is a main factor influencing user experience. The downlink rate is not only related to the signal quality of the resident cell, but also affected by the scheduling of the base station, the degree of congestion of the base station, the core network connected to the cell, and the like, and even in a cell with good signal quality, the problem of too low downlink rate exists. Therefore, if the camping cell is selected only according to the signal quality, there may be a problem that the signal quality of the cell is high but the downlink rate that can be provided is low, resulting in that the user network is stuck or even unable to access the network.
Disclosure of Invention
The embodiment of the application provides a cell selection method, a cell selection device, a terminal and a storage medium. The technical scheme is as follows:
in one aspect, embodiments of the present Application provide a cell selection method, where the method is applied to a terminal provided with an Application Processor (AP) and a Baseband Processor (BP). The method comprises the following steps:
acquiring a current downlink rate and a current application scene through the AP;
responding to the situation that the current downlink rate does not meet the network access condition corresponding to the current application scene, and sending a cell switching instruction to the BP through the AP, wherein the cell switching instruction is used for indicating the BP to switch the resident cell, and the network access conditions corresponding to different application scenes are different;
and switching the resident cell through the BP based on the cell switching instruction.
In another aspect, an embodiment of the present application provides a cell selection apparatus, where the apparatus includes:
an obtaining module, configured to obtain a current downlink rate and a current application scenario through the AP;
a first sending module, configured to send, in response to that the current downlink rate does not satisfy the network access condition corresponding to the current application scenario, a cell switching instruction to the BP through the AP, where the cell switching instruction is used to instruct the BP to switch a camped cell, and network access conditions corresponding to different application scenarios are different;
and the cell switching module is used for switching the resident cell through the BP based on the cell switching instruction.
In another aspect, an embodiment of the present application provides a terminal, where the terminal includes a processor and a memory; the memory has stored therein at least one instruction, at least one program, set of codes, or set of instructions that is loaded and executed by the processor to implement a method of cell selection as described in the above aspect.
In another aspect, an embodiment of the present application provides a computer-readable storage medium, in which at least one computer program is stored, where the computer program is loaded and executed by a processor to implement the cell selection method according to the above aspect.
According to an aspect of the application, a computer program product or computer program is provided, comprising computer instructions, the computer instructions being stored in a computer readable storage medium. The processor of the terminal reads the computer instructions from the computer-readable storage medium, and executes the computer instructions to cause the terminal to perform the cell selection method provided in the various alternative implementations of the above aspects.
The technical scheme provided by the embodiment of the application at least comprises the following beneficial effects:
in the embodiment of the application, on the basis of cell selection and residence through a BP (back-propagation), a mechanism for assisting the BP to perform cell selection is provided, the current downlink rate is obtained by utilizing the function of the AP, whether the provided downlink rate of the currently resident cell meets the network access condition is judged, and when the current downlink rate is low and normal access of a network cannot be guaranteed, a cell switching notification is sent to the BP through the AP, so that the BP reselects the cell, the terminal can be prevented from residing in the cell with good signal quality but low actual downlink rate for a long time, and the network access requirement of a user is guaranteed; and the network access condition is determined based on a specific application scene, and whether the resident cell needs to be switched or not can be judged based on the actual network requirement of the user, so that various network operations of the user can be normally executed, and the conditions that the cell is switched under an unnecessary scene or cannot be switched in time and the like due to single network access condition are avoided.
Drawings
FIG. 1 is a schematic illustration of an implementation environment shown in an exemplary embodiment of the present application;
fig. 2 is a flowchart illustrating a cell handover method according to an exemplary embodiment of the present application;
fig. 3 is a flowchart illustrating a cell handover method according to another exemplary embodiment of the present application;
fig. 4 is a flowchart illustrating a cell handover method according to another exemplary embodiment of the present application;
fig. 5 is a flowchart illustrating a cell handover method according to another exemplary embodiment of the present application;
fig. 6 is a flowchart illustrating an AP assisting a BP in performing a cell selection task according to an exemplary embodiment of the present application;
fig. 7 is a block diagram illustrating a cell switching apparatus according to an exemplary embodiment of the present application;
fig. 8 shows a block diagram of a terminal according to an exemplary embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Reference herein to "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
In the related art, a terminal monitors signal quality (e.g., signal strength) of each cell, and automatically selects a cell with the highest signal quality for camping. When a user accesses a network by using a terminal, the data volume of downlink data is much larger than that of uplink data, so the transmission rate of the downlink data is a main factor influencing user experience. The downlink rate is not only related to the signal quality of the resident cell, but also affected by the scheduling of the base station, the degree of congestion of the base station, the core network connected to the cell, and the like, and even in a cell with good signal quality, the problem of too low downlink rate exists. Therefore, if the camping cell is selected only according to the signal quality, there may be a problem that the signal quality of the cell is high but the downlink rate that can be provided is low, resulting in that the user network is stuck or even unable to access the network.
In order to solve the foregoing technical problem, an embodiment of the present application provides a cell selection method. FIG. 1 illustrates a schematic diagram of an implementation environment provided by one embodiment of the present application. The implementation environment may include: a terminal 110 and a background server 120, wherein the terminal 110 is internally provided with an AP and a BP. Only one terminal 110 is shown, and in a practical application environment, more terminals may be involved to interact with the background server. The terminal 110 initiates a network registration request to the cell through the BP, and camps on the appropriate cell. In operation, the terminal 110 performs cell selection by AP assisted BP. Specifically, the terminal 110 detects the current downlink rate through the AP, and when the current downlink rate does not satisfy the network access condition, the terminal 110 notifies the BP through the AP to perform cell switching. In the cell switching notification sent by the AP to the BP, a preferred cell set may be specified, and the cell set may be obtained by the AP from the backend server 120 based on the geographic location. When determining that the current downlink rate meets the network access condition or does not meet the network access condition, the AP feeds back the network connection condition to the background server 120. The background server 120 receives the network connection condition sent by each terminal 110, and counts the network abnormal cells and the network normal cells, so as to send a cell set to the terminal 110 based on the network normal cells when receiving the cell recommendation request.
The AP assists the BP to select the cell, and when the current downlink rate is low and normal access of the network cannot be guaranteed, the BP sends a cell switching notice to the BP through the AP, so that the BP reselects the cell, the terminal can be prevented from residing in the cell with good signal quality but low actual downlink rate for a long time, and the network access requirement of a user is guaranteed.
Fig. 2 is a flowchart illustrating a cell selection method according to an exemplary embodiment of the present application. The present embodiment is described by taking as an example that the method is applied to a terminal provided with an AP and a BP, and the method includes the following steps.
Step 201, obtaining a current downlink rate and a current application scenario through an AP.
The AP is a very large scale integrated circuit that extends audio and video functions and a dedicated interface on the basis of a low power consumption Central Processing Unit (CPU). An operating system, a user interface, an application program and the like of the terminal are all run on the AP. And the radio frequency communication control software of the terminal runs on another separated CPU, namely BP. The AP and BP in the terminal are separate hardware.
The uplink rate refers to a data transmission rate when the terminal sends information to the base station, for example, a data transmission rate from a terminal such as a mobile phone or a notebook computer to the base station. The downlink rate refers to a transmission rate when the base station sends information to the terminal, for example, a rate at which the terminal, such as a mobile phone or a notebook computer, downloads data from the base station or a network. Generally, in the process that a user accesses a network by using a terminal, the scene of acquiring downlink data by the terminal is far more than the scene of uploading uplink data, so that the downlink rate is a main factor influencing the actual network experience of the user.
In one possible implementation, the terminal selects the cell with the highest signal quality (e.g., the highest signal strength) for camping through the BP based on the 3GPP specification. And after the terminal selects a cell to reside through the BP, the terminal sends a notice to the AP through the BP to trigger the AP to monitor the downlink rate. Further, the network access condition is related to the application scenario. When the terminal monitors the downlink rate, the terminal acquires the current application scene besides the current downlink rate so as to judge whether the current downlink rate meets the network access condition or not based on the current application scene. The terminal obtains the current downlink rate through the AP, and illustratively, the AP determines the current downlink rate through calculation (the number of received bytes/the target sampling duration).
Optionally, the AP acquires the downlink rate after switching to the new cell, or the AP acquires the downlink rate every predetermined time.
Step 202, in response to that the current downlink rate does not satisfy the network access condition corresponding to the current application scenario, a cell switching instruction is sent to the BP through the AP.
The cell switching instruction is used for indicating BP to switch the resident cell, and the network access conditions corresponding to different application scenes are different.
In a possible embodiment, a network access condition is provided in the terminal. The downlink rate meeting the network access condition can enable the terminal to normally access the network. And after the AP acquires the current downlink rate, judging whether the current downlink rate meets the network access condition, if so, waiting for the next monitoring, and if not, sending a cell switching instruction to the BP by the terminal through the AP so that the BP reselects the cell to reside. The corresponding relation between the application scene and the network access condition is stored in the terminal, and after the terminal acquires the current application scene through the AP, the network access condition corresponding to the current application scene is continuously determined through the AP.
The network access conditions corresponding to different application scenes are different, and the network access conditions corresponding to the application scenes are set by developers in advance according to the requirements of the application scenes on the network. For example, the requirement of the video playing scene on the downlink rate is higher than that of the web browsing scene, and the network access condition corresponding to the video playing scene is stricter.
Optionally, the network access condition is a fixed condition, or the network access condition may be dynamically adjusted in an actual application process.
And step 203, switching the resident cell by BP based on the cell switching instruction.
After the BP receives a cell switching instruction sent by the AP, the terminal cuts off the connection with the current resident cell through the BP, and reselects a cell from other nearby cells for resident. Optionally, the cell to be preferentially camped may be designated or may not be designated in the cell handover command sent by the AP to the BP, which is not limited in this embodiment of the present application.
To sum up, in the embodiment of the present application, on the basis of cell selection and residence in a BP, a mechanism for assisting the BP in cell selection by an AP is provided, a current downlink rate is obtained by using the function of the AP, and it is determined whether the downlink rate provided by the currently resident cell meets a network access condition, when the current downlink rate is low and normal access to a network cannot be guaranteed, a notification of cell switching is sent to the BP through the AP, so that the BP reselects a cell, and a terminal can be prevented from residing in a cell with good signal quality but a low actual downlink rate for a long time, thereby guaranteeing a network access requirement of a user.
Because the requirements of the terminal on the downlink rate are different in different application scenes, for example, the terminal needs a higher downlink rate when playing a video, and the requirement on the downlink rate is lower when browsing a webpage, the terminal determines a network access condition based on the current application scene and performs cell selection according to the actual network requirement of a user. The most important factor affecting the user network experience is the downlink rate, so that the terminal judges whether to switch the cell or not through the AP based on the requirement of the application scene on the downlink rate. Fig. 3 is a flowchart illustrating a cell selection method according to another exemplary embodiment of the present application. The present embodiment is described by taking as an example that the method is applied to a terminal provided with an AP and a BP, and the method includes the following steps.
Step 301, obtaining a current downlink rate through the AP, and determining a current application scenario based on an application type of a foreground application and/or a data type of downlink data.
In a possible implementation manner, the AP determines a current application scenario based on a program type of an application program running in a foreground, for example, when the application program in the foreground is a browser, the terminal determines that the current application scenario is web browsing; or, the terminal determines the current application scene based on the data type of the current downlink data, for example, when the current downlink data includes video data, the terminal determines that the current application scene is a video playing scene; or, the terminal determines the current application scene based on the application type of the foreground application and the data type of the downlink data, for example, the foreground application is a shopping application, and when the downlink data includes video data, the terminal determines that the current application scene is a live broadcast scene.
Optionally, the application scenario includes video playing, audio playing, web browsing, text browsing, online payment, positioning and navigation, instant messaging, and other scenarios.
Step 302, determining a target downlink rate threshold corresponding to the current application scenario.
In a possible implementation manner, downlink rate thresholds corresponding to each application scenario are stored in the terminal, and the AP determines whether the current downlink rate satisfies a network access condition based on whether the current downlink rate satisfies a target downlink rate threshold corresponding to the current application scenario. The downlink rate thresholds corresponding to different application scenarios are different, for example, the downlink rate threshold corresponding to an application scenario (such as a live broadcast scenario, a positioning scenario, and a navigation scenario) in which the amount of downlink data to be acquired by the terminal is large or the real-time requirement on the downlink data is high; and in an application scenario (such as a web browsing scenario) where the amount of downlink data is small or the requirement on the real-time performance of the downlink data is low, the corresponding downlink rate threshold is low.
Step 303, in response to that the current downlink rate is smaller than the target downlink rate threshold, determining that the current downlink rate does not satisfy the network access condition corresponding to the current application scenario.
The terminal determines the network access condition based on the current application scene, and compared with the situation that a single downlink rate threshold value is set, the cell switching control can be carried out according to the current actual network requirements of the user, so that the situation that unnecessary cell switching is carried out under the scene with lower downlink rate requirements due to overhigh downlink rate threshold value or the situation that the network quality still cannot be ensured under the scene with higher downlink rate requirements due to overlow downlink rate threshold value is avoided.
Step 304, sending a cell switching instruction to the BP through the AP.
Optionally, after determining that the current downlink rate does not satisfy the network access condition corresponding to the current application scenario, the AP immediately sends a cell switching instruction to the BP, or after determining that the current downlink rate does not satisfy the network access condition corresponding to the current application scenario n times continuously, the AP sends a cell switching instruction to the BP, so as to avoid a situation that the terminal frequently switches a resident cell when the user switches the application scenario, where n is a positive integer. The embodiments of the present application do not limit this.
And 305, switching the resident cell by BP based on the cell switching instruction.
For a specific implementation of step 305, reference may be made to step 203 described above, and details of this embodiment are not described herein again.
In the embodiment of the application, when the AP acquires the current downlink rate, the AP also acquires the current application scenario corresponding to the current downlink rate, determines the network access condition based on the specific application scenario, and further determines whether the current downlink rate meets the network access condition of the current application scenario, and can determine whether to switch the residential cell based on the actual network access requirement of the user, thereby ensuring that each network operation of the user can be normally executed.
In one possible implementation, the AP may also perform cell handover based on network big data assisted BP. Fig. 4 is a flowchart illustrating a cell selection method according to another exemplary embodiment of the present application. The present embodiment is described by taking as an example that the method is applied to a terminal provided with an AP and a BP, and the method includes the following steps.
Step 401, in response to the network connection command, performing cell measurement by BP to obtain signal strength of each cell network.
And when the terminal is connected with the network for the first time and receives the network connection instruction, carrying out cell measurement through the BP. And selecting the cell with the highest signal quality for connection by the BP based on the rule of 3 GPP. And the BP carries out cell measurement to obtain the signal intensity of each cell.
Step 402, initiating a network registration request to the cell with the highest signal strength through the BP.
The BP establishes Radio Resource Control (RRC) connection to a cell with the highest signal strength, and initiates a Tracking Area Update (TAU) request to the cell to request registration of a network.
Step 403, in response to the successful network registration, sending a network registration result to the AP through the BP, where the network registration result includes a cell identifier of the currently camped cell.
And after the network registration is successful, the terminal sends a network registration result to the AP through the BP, and then informs the AP of the current resident cell, so that the AP feeds back the network connection condition or updates an abnormal cell list and the like to a background server based on the cell identifier of the current registered cell.
Step 404, obtaining the current downlink rate and the current application scenario through the AP.
The specific implementation of step 404 may refer to step 201 described above, and details of this embodiment are not described herein again.
Step 405, in response to that the current downlink rate does not satisfy the network access condition corresponding to the current application scenario, sending a network exception notification to the background server through the AP.
The network anomaly notification comprises a cell identifier of a current resident cell, a scene identifier corresponding to a current application scene and position information of the terminal, and the background server is used for updating an anomalous cell record based on the network anomaly notification sent by each terminal. Optionally, the network anomaly notification may further include the current downlink rate.
In a possible implementation manner, when the current downlink rate does not satisfy the network notification condition, the terminal feeds back the network abnormal condition to the background server through the AP, so that the background server updates the abnormal cell record and the normal cell record. For example, the background server determines whether a certain cell is abnormal based on a network abnormality notification received in the target duration, and if the number of times that the background server receives the network abnormality notification about the target cell sent by the terminal exceeds a threshold number of times, it is determined that the target cell has a network abnormality, and the target cell is removed from the normal cell record and added to the abnormal cell record. And when the background server subsequently receives a cell acquisition request sent by the terminal AP, screening the cell from the normal cell record for feedback.
Further, the network exception notification includes the current application scenario, and the exception cell record of the background server stores the corresponding relationship between the exception cell and the application scenario.
In another possible implementation manner, if the current downlink rate meets the network access condition, the terminal sends a network connection notification to the background server through the AP, so that the background server updates the normal cell record and the abnormal cell record, so that each terminal acquires the recommended cell from the background server. For example, the background server determines whether a certain cell is normal based on a network connection notification received in a target duration, if the number of times that the background server receives the network connection notification about the target cell sent by the terminal exceeds a threshold number of times, it is determined that the network of the target cell is normal, and if the target cell previously belongs to an abnormal cell, the target cell is removed from an abnormal cell record and added to a normal cell record.
And step 406, in response to that the current downlink rate does not satisfy the network access condition corresponding to the current application scenario, sending a cell switching instruction to the BP through the AP.
In a possible embodiment, the cell switching instruction sent by the terminal to the BP through the AP includes a cell set, which may be an exclusive designated set (i.e., which cells are designated to be non-camped), or a preferential designated set (i.e., which cells are designated to be camped are selected from among the cells).
For the exclusive designated set, step 406 specifically includes the following steps:
step 406a, updating, by the AP, the abnormal cell list based on the cell identifier of the currently camped cell and the current application scenario.
The terminal stores an abnormal cell list which comprises cell identifications corresponding to cells of which the downlink rates do not meet the network access conditions. And when the AP determines that the current downlink rate does not meet the network access condition, determining the current resident cell as an abnormal cell and adding the abnormal cell to the abnormal cell list. Specifically, the AP updates an abnormal cell list based on the current application scenario, where the abnormal cell list includes a correspondence between the application scenario and the abnormal cell, that is, the abnormal cell corresponding to each application scenario is recorded.
Step 406b, determining, by the AP, a network abnormal cell corresponding to the current application scenario in the updated abnormal cell list as a first cell set.
When the cell switching instruction is used for notifying the cell where the BP cannot reside, the AP determines a network abnormal cell corresponding to the current application scenario in the updated abnormal cell list as a first cell set.
Further, in step 406a, the terminal updates, through the AP, the abnormal cell list based on the cell identifier of the currently camped cell and the current application scenario. The abnormal cell list also stores the corresponding relation between each network abnormal cell and the application scene, and the application scene corresponding to the network abnormal cell is the current application scene determined by the AP when the cell is determined as the network abnormal cell. Correspondingly, the AP screens the abnormal cell list based on the current application scene to obtain a first cell set. For example, the AP determines, in the abnormal cell list, a network abnormal cell corresponding to the current application scenario and a network abnormal cell corresponding to an application scenario in which the downlink rate threshold is lower than the downlink rate threshold of the current application scenario in the network access condition as a first cell set. For example, if the AP determines that the current downlink rate does not satisfy the network access request in the video playing scene, the network abnormal cell corresponding to the video playing scene and the web browsing scene in the abnormal cell list is determined as the cell in the first cell set.
Step 406c, sending a cell switching instruction including the first cell set to the BP through the AP, where the cell switching instruction is used to instruct the BP to determine a target camping cell from cells outside the first cell set.
For example, if the first cell set includes cell a, cell B, and cell C, the BP performs a network searching action after receiving a cell switching instruction, detects that there are nearby cell a, cell C, cell B, cell D, and cell E, and selects a camping cell from cell D and cell E. Specifically, the cell switching instruction includes a cell identifier of each cell in the first cell set.
And the terminal also sends a network detection request to the background server at regular time through the AP aiming at the abnormal cell list, and eliminates the cells with the normal network recovery in the abnormal cell list, so as to prevent the cells with the speaking downlink rate meeting the network access condition from being added to the first cell set. In a possible implementation manner, the cell selection method provided in an embodiment of the present application further includes the following steps:
step one, a network detection request is sent to a background server through an AP according to a target period, the network detection request comprises an abnormal cell list, the background server is used for generating a network detection result based on the latest updated abnormal cell record, and the network detection result is used for indicating whether each network abnormal cell in the abnormal cell list is recovered to be normal or not.
And the terminal sends a network detection request to the background server through the AP according to the target period so as to detect whether each network abnormal cell in the abnormal cell list is normal or not, and the network access condition of the corresponding application scene can be met. And the background server updates the abnormal cell record in real time based on the network connection notification and the network abnormity notification sent by each terminal, so that when a network detection request is received, a network detection result is generated based on the latest updated abnormal cell record.
And step two, updating the abnormal cell list through the AP based on the network detection result sent by the background server.
And if the network detection result indicates that the downlink rate of the cells in the abnormal cell list can meet the network access condition, the terminal removes the corresponding cells from the abnormal cell list through the AP.
For the priority assignment set, step 406 specifically includes the following steps:
step 406d, a cell acquisition request is sent to the background server through the AP, where the cell acquisition request includes location information and a scene identifier, the background server is configured to determine a second cell set based on the cell acquisition request and a normal cell record, a downlink rate of a cell in the second cell set satisfies a network access condition corresponding to a current application scene, and a distance between the cell in the second cell set and the terminal is smaller than a distance threshold.
Since the AP itself cannot detect the downlink rates of other cells, it needs to acquire the recommended cell from the background server based on the network big data, that is, according to the network connection condition fed back by other terminals.
In a possible implementation manner, the AP sends a cell acquisition request to the background server, and acquires the recommended cell based on the geographic location and the application scenario, where the location information includes the geographic location coordinates of the terminal or the name of the area (city, district, street, etc.) where the terminal is located. And the background server screens out the network normal cells which are distant from the cell distance threshold value between the terminals from the normal cell records corresponding to the current application scene, and generates a second cell set.
And step 406e, receiving the second cell set sent by the background server through the AP.
Step 406f, sending a cell switching instruction containing the second cell set to the BP through the AP, where the cell switching instruction is used to instruct the BP to determine a target camping cell from the second cell set.
And after receiving the second cell set from the background server through the AP, the terminal sends a cell switching instruction containing the second cell set to the BP. Specifically, the cell switching instruction includes a cell identifier of each cell in the second cell set.
Step 407, switching the resident cell by BP based on the cell switching command.
In a possible embodiment, if the cell switching command includes the first cell set, that is, when the AP specifies a cell to be excluded, the terminal selects a camping cell from other cells by BP, for example, selects a cell with the highest signal strength from cells outside the first cell set for network registration.
Illustratively, a BP receives a cell cutting command including a first cell set, where the first cell set includes a cell a and a cell B, and a terminal initiates a network searching behavior through the BP to detect network signals of the cell a, the cell B, the cell C, the cell D, and the cell E, and then determines a cell with the highest signal strength among the cell C, the cell D, and the cell E as a target residence cell.
In another possible embodiment, the cell switching instruction includes a combination of second cells, and the terminal selects a camping cell from the cells preferentially designated by the terminal through the BP, step 407 further includes the following steps:
step 407a, releasing the RRC connection with the currently camped cell by BP.
Step 407b, in response to the modem controlled by the BP being in an idle state, determining the cell with the highest signal strength in the second cell set as the target camping cell by the BP.
And when the BP cuts off the connection with the current resident cell and the modem is in an idle state, the BP performs network searching action, determines the signal intensity of each cell in the second cell set, and determines the cell which can detect that the signal intensity in the second cell set meets the network connection condition and is the highest as the target resident cell.
In a possible embodiment, if the second cell set includes only one cell and the BP determines that the signal strength of the cell satisfies the network connection condition, the BP directly determines the cell as the target camping cell.
In another possible embodiment, the cell switching command sent by the AP to the BP includes both the first cell set and the second cell set. And if the BP detects cell signals in the second cell set, preferentially determining a target resident cell from the second cell set, and if the BP does not search any cell in the second cell set, determining the target resident cell from the cells except the first cell set.
Step 407c, sending a network registration request to the target residential cell through the BP.
The BP establishes RRC connection to the target resident cell and initiates a TAU request to the target resident cell to request for registering the network.
Step 408, in response to the successful network registration, sending the network registration result containing the cell identifier corresponding to the target resident cell to the AP through the BP.
After the network registration is successful, the terminal sends a network registration result to the AP through the BP, so that the AP feeds back the network connection condition to the network big data based on the monitoring result in the subsequent network monitoring process.
Step 409, in response to that the downlink rate in the target resident cell meets the network access condition corresponding to the current application scenario, sending a network connection notification to the background server through the AP.
And the background server updates the normal cell record based on the network connection notification.
Correspondingly, if the downlink rate in the target resident cell does not meet the network access condition, the terminal sends a network exception notification to the background server through the AP.
In the embodiment of the application, on one hand, the AP is responsible for recording network abnormal cells and updating an abnormal cell list based on network big data, so as to notify the BP of the cells to be excluded when determining that the resident cells need to be switched, and on the other hand, the AP can request the background server to acquire the network normal cells, so as to switch the BP to the cells of which the downlink rate can meet the network access conditions as much as possible, improve the cell switching efficiency, and ensure the smooth network operation of the user.
Frequently detecting the downlink rate and cell switching may cause network instability, or repeatedly switching the resident cell when the user temporarily switches the application scenario, so that the AP does not monitor the downlink rate any more or notifies the BP again to perform network switching within a certain time after notifying the BP to perform cell switching. Fig. 5 is a flowchart illustrating a cell selection method according to another exemplary embodiment of the present application. The present embodiment is described by taking as an example that the method is applied to a terminal provided with an AP and a BP, and the method includes the following steps.
Step 501, obtaining a current downlink rate and a current application scenario through an AP.
Step 502, in response to that the current downlink rate does not satisfy the network access condition corresponding to the current application scenario, sending a cell switching instruction to the BP through the AP.
For the specific implementation of steps 501 to 502, reference may be made to steps 201 to 202, which are not described herein again in this embodiment of the present application.
In step 503, a timer is started based on the target duration.
In a possible implementation manner, after the AP sends the cell switching instruction to the BP, a timer is started, and when the timing duration of the timer does not reach the target duration, the AP does not perform downlink rate monitoring or does not send the cell switching instruction to the BP. To avoid too frequent cell handovers.
And step 504, based on the cell switching instruction, switching the resident cell by BP.
For a specific implementation of step 504, reference may be made to step 203 described above, and details of this embodiment are not described herein again.
And 505, in response to that the timing duration of the timer reaches the target duration and the current downlink rate does not meet the network access condition corresponding to the current application scenario, sending a cell switching instruction to the BP through the AP.
Optionally, the AP acquires the current downlink rate after the timing duration of the timer reaches the target duration, or the AP acquires the current downlink rate in real time, and if the current downlink rate does not satisfy the network access condition corresponding to the current application scenario and the timing duration reaches the target duration, the AP sends a cell switching instruction to the BP.
In the embodiment of the application, the timer is set after the AP sends the cell switching instruction to the BP, and the AP is controlled to perform the next round of cell network monitoring after the time of the timer is reached, so that the situation that the network is unstable due to frequent detection of the downlink rate and cell switching or the resident cell is repeatedly switched when a user temporarily switches application scenes can be avoided.
With reference to the foregoing embodiments, in an illustrative example, a flow of performing a cell selection task by an AP and a BP in a terminal is shown in fig. 6, and the flow includes the following steps.
Step 601, the AP acquires the current downlink rate.
In step 602, the AP determines whether the current downlink rate meets the network access condition. If yes, the AP performs step 604; if not, the AP performs step 603.
Step 603, the AP sends a cell switch instruction to the BP.
At step 604, the AP waits for the next round of monitoring.
In step 605, the BP switches the camping cell based on the cell switching instruction.
Fig. 7 is a block diagram of a cell selection apparatus according to an exemplary embodiment of the present application, where the apparatus includes:
an obtaining module 701, configured to obtain a current downlink rate and a current application scenario through the AP;
a first sending module 702, configured to send, in response to that the current downlink rate does not satisfy the network access condition corresponding to the current application scenario, a cell switching instruction to the BP through the AP, where the cell switching instruction is used to indicate that the BP switches to a resident cell, and network access conditions corresponding to different application scenarios are different;
a cell switching module 703, configured to switch the camping cell through the BP based on the cell switching instruction.
Optionally, the obtaining module 701 includes:
a first determining unit, configured to obtain the current downlink rate through the AP, and determine the current application scenario based on an application type of a foreground application and/or a data type of downlink data;
the first sending module 702 includes:
a second determining unit, configured to determine a target downlink rate threshold corresponding to the current application scenario;
a third determining unit, configured to determine, in response to that the current downlink rate is smaller than the target downlink rate threshold, that the current downlink rate does not satisfy a network access condition corresponding to the current application scenario;
a first sending unit, configured to send the cell switching instruction to the BP through the AP.
Optionally, the apparatus further comprises:
the signal measurement module is used for responding to a network connection instruction and carrying out cell measurement through the BP to obtain the signal intensity of each cell network;
a network request module, configured to initiate a network registration request to a cell with the highest signal strength through the BP;
a second sending module, configured to send, in response to a successful network registration, a network registration result to the AP through the BP, where the network registration result includes a cell identifier of the current camped cell;
a third sending module, configured to send, in response to that the current downlink rate does not satisfy the network access condition corresponding to the current application scenario, a network anomaly notification to a background server through the AP, where the network anomaly notification includes a cell identifier of the current residential cell, a scenario identifier corresponding to the current application scenario, and location information of the terminal, and the background server is configured to update an anomalous cell record based on the network anomaly notification sent by each terminal.
Optionally, the first sending module 702 includes:
an updating unit, configured to update, by the AP, an abnormal cell list based on the cell identifier of the current camped cell and the current application scenario;
a fourth determining unit, configured to determine, by the AP, a network abnormal cell corresponding to the current application scenario in the updated abnormal cell list as a first cell set;
a second sending unit, configured to send, to the BP through the AP, the cell switching instruction including the first cell set, where the cell switching instruction is used to instruct the BP to determine a target camping cell from cells outside the first cell set.
Optionally, the apparatus further comprises:
a fourth sending module, configured to send, by the AP, a network detection request to the backend server according to a target period, where the network detection request includes the abnormal cell list, the backend server is configured to generate a network detection result based on the abnormal cell record that is updated last time, and the network detection result is used to indicate whether each network abnormal cell in the abnormal cell list returns to normal;
and the updating module is used for updating the abnormal cell list through the AP based on the network detection result sent by the background server.
Optionally, the first sending module 702 includes:
a third sending unit, configured to send a cell acquisition request to the backend server through the AP, where the cell acquisition request includes the location information and the scene identifier, the backend server is configured to determine a second cell set based on the cell acquisition request and a normal cell record, a downlink rate of a cell in the second cell set meets a network access condition corresponding to the current application scene, and a distance between the cell in the second cell set and the terminal is smaller than a distance threshold;
a receiving unit, configured to receive, through the AP, the second cell set sent by the background server;
a fourth sending unit, configured to send, by the AP, the cell handover instruction including the second cell set to the BP, where the cell handover instruction is used to instruct the BP to determine a target camping cell from the second cell set.
Optionally, the cell switching module 703 includes:
a connection release unit, configured to release the RRC connection with the current camped cell through the BP;
a fifth determining unit, configured to determine, in response to that a modem controlled by the BP is in an idle state, a cell with the highest signal strength in the second cell set as a target camping cell through the BP;
a fifth sending unit, configured to send the network registration request to the target residential cell through the BP.
Optionally, the apparatus further comprises:
a fourth sending module, configured to send, in response to successful network registration, a network registration result including a cell identifier corresponding to the target camped cell to the AP through the BP;
a fifth sending module, configured to send a network connection notification to the background server through the AP in response to that the downlink rate in the target residential cell meets the network access condition corresponding to the current application scenario, where the background server updates a normal cell record based on the network connection notification.
Optionally, the apparatus further comprises:
a timing module for starting a timer based on a target duration;
a sixth sending module, configured to send the cell switching instruction to the BP through the AP in response to that the timing duration of the timer reaches the target duration and the current downlink rate does not satisfy the network access condition corresponding to the current application scenario.
To sum up, in the embodiment of the present application, on the basis of cell selection and residence by a BP, a mechanism for assisting the BP in cell selection by an AP is provided, a current downlink rate is obtained by using the function of the AP, and it is determined whether the downlink rate provided by the currently resident cell meets a network access condition, when the current downlink rate is low and normal access to a network cannot be guaranteed, a notification of cell switching is sent to the BP by the AP, so that the BP reselects a cell, and a terminal can be prevented from residing in a cell with good signal quality but a low actual downlink rate for a long time, and a network access requirement of a user is guaranteed; and the network access condition is determined based on a specific application scene, and whether the resident cell needs to be switched or not can be judged based on the actual network requirement of the user, so that various network operations of the user can be normally executed, and the conditions that the cell is switched under an unnecessary scene or cannot be switched in time and the like due to single network access condition are avoided.
Referring to fig. 8, a block diagram of a terminal according to an exemplary embodiment of the present application is shown. The terminal 800 may be a smart phone, a tablet computer, a notebook computer, etc. The terminal 800 in the present application may include one or more of the following components: a processor 810, a memory 820, and a display screen 830.
Processor 810 may include one or more processing cores. The processor 810, which is connected to various parts throughout the terminal 800 using various interfaces and lines, performs various functions of the terminal 800 and processes data by executing or executing instructions, programs, code sets, or instruction sets stored in the memory 820 and calling data stored in the memory 820. Alternatively, the processor 810 may be implemented in hardware using at least one of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), and Programmable Logic Array (PLA). The processor 810 may integrate one or more of a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), a Neural-Network Processing Unit (NPU), a modem, and the like. Wherein, 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 to be displayed by the touch display screen 830; the NPU is used for realizing an Artificial Intelligence (AI) function; the modem is used to handle wireless communications. It is understood that the modem may not be integrated into the processor 810, but may be implemented by a single chip. In this embodiment, the processor 810 further includes an AP811 and a BP812, where the BP812 is configured to perform activities such as selecting a camping cell and registering a network based on running radio frequency communication control software, and the AP811 is configured to run an operating system, a user interface, an application program, and the like, and simultaneously assist the BP812 in selecting the camping cell based on network big data.
The Memory 820 may include a Random Access Memory (RAM) or a Read-Only Memory (ROM). Optionally, the memory 820 includes a non-transitory computer-readable medium. The memory 820 may be used to store instructions, programs, code sets, or instruction sets. The memory 820 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 various method embodiments described below, and the like; the storage data area may store data (such as audio data, a phonebook) created according to the use of the terminal 800, and the like.
Display screen 830 is a display component for displaying a user interface. Optionally, the display screen 830 further has a touch function, and a user can perform a touch operation on the display screen 830 by using any suitable object such as a finger, a touch pen, and the like.
The display screen 830 is generally provided at a front panel of the terminal 830. The display screen 830 may be designed as a full-face screen, curved screen, contoured screen, double-face screen, or folding screen. The display screen 830 may be designed as a combination of a full-screen and a curved-screen, or a combination of a non-flat screen and a curved-screen, which is not limited in this embodiment.
In addition, those skilled in the art will appreciate that the configuration of terminal 800 illustrated in the above-described figures does not constitute a limitation of terminal 800, and that terminals may include more or less components than those illustrated, or some components may be combined, or a different arrangement of components. For example, the terminal 800 further includes a camera module, a microphone, a speaker, a radio frequency circuit, an input unit, a sensor (such as an acceleration sensor, an angular velocity sensor, a light sensor, and the like), an audio circuit, a WiFi module, a power supply, a bluetooth module, and other components, which are not described herein again.
An embodiment of the present application further provides a computer-readable storage medium, which stores at least one instruction, where the at least one instruction is loaded and executed by a processor to implement the cell selection method according to the above embodiments.
According to an aspect of the application, a computer program product or computer program is provided, comprising computer instructions, the computer instructions being stored in a computer readable storage medium. The processor of the terminal reads the computer instructions from the computer-readable storage medium, and executes the computer instructions to cause the terminal to perform the cell selection method provided in the various alternative implementations of the above aspects.
Those skilled in the art will recognize 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, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable storage medium. Computer-readable storage 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 above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (12)

1. A cell selection method is applied to a terminal provided with an application processor AP and a baseband processor BP, and comprises the following steps:
acquiring a current downlink rate and a current application scene through the AP;
responding to the situation that the current downlink rate does not meet the network access condition corresponding to the current application scene, and sending a cell switching instruction to the BP through the AP, wherein the cell switching instruction is used for indicating the BP to switch the resident cell, and the network access conditions corresponding to different application scenes are different;
and switching the resident cell through the BP based on the cell switching instruction.
2. The method of claim 1, wherein the obtaining, by the AP, a current downlink rate and a current application scenario comprises:
acquiring the current downlink rate through the AP, and determining the current application scene based on the application type of a foreground application program and/or the data type of downlink data;
the sending, by the AP, a cell switching instruction to the BP in response to the current downlink rate not satisfying the network access condition corresponding to the current application scenario includes:
determining a target downlink rate threshold corresponding to the current application scene;
responding to the situation that the current downlink rate is smaller than the target downlink rate threshold value, and determining that the current downlink rate does not meet the network access condition corresponding to the current application scene;
and sending the cell switching instruction to the BP through the AP.
3. The method of claim 1, wherein before the obtaining of the current downlink rate and the current application scenario by the AP, the method comprises:
responding to a network connection instruction, and carrying out cell measurement through the BP to obtain the signal intensity of each cell network;
initiating a network registration request to a cell with the highest signal strength through the BP;
responding to the success of network registration, sending a network registration result to the AP through the BP, wherein the network registration result comprises a cell identifier of the current resident cell;
after the current downlink rate and the current application scenario are obtained through the AP, the method includes:
and in response to that the current downlink rate does not meet the network access condition corresponding to the current application scene, sending a network anomaly notification to a background server through the AP, wherein the network anomaly notification comprises the cell identifier of the current resident cell, the scene identifier corresponding to the current application scene and the position information of the terminal, and the background server is used for updating an abnormal cell record based on the network anomaly notification sent by each terminal.
4. The method of claim 3, wherein the sending, by the AP, the cell switch instruction to the BP comprises:
updating, by the AP, an abnormal cell list based on the cell identifier of the currently camped cell and the current application scenario;
determining the network abnormal cell corresponding to the current application scene in the updated abnormal cell list as a first cell set through the AP;
sending, by the AP, the cell switching instruction including the first cell set to the BP, where the cell switching instruction is used to instruct the BP to determine a target camping cell from cells outside the first cell set.
5. The method of claim 4, further comprising:
sending a network detection request to the background server through the AP according to a target period, wherein the network detection request comprises the abnormal cell list, the background server is used for generating a network detection result based on the abnormal cell record updated last time, and the network detection result is used for indicating whether each network abnormal cell in the abnormal cell list returns to normal or not;
and updating the abnormal cell list through the AP based on a network detection result sent by the background server.
6. The method of claim 3, wherein the sending, by the AP, the cell switch instruction to the BP comprises:
sending a cell acquisition request to the background server through the AP, wherein the cell acquisition request comprises the position information and the scene identifier, the background server is used for determining a second cell set based on the cell acquisition request and a normal cell record, the downlink rate of cells in the second cell set meets the network access condition corresponding to the current application scene, and the distance between the cells in the second cell set and the terminal is less than a distance threshold;
receiving, by the AP, the second set of cells sent by the background server;
sending, by the AP, the cell switching instruction including the second cell set to the BP, where the cell switching instruction is used to instruct the BP to determine a target camping cell from the second cell set.
7. The method of claim 6, wherein the switching the camped cell by the BP based on the cell switching instruction comprises:
releasing Radio Resource Control (RRC) connection with the current resident cell through the BP;
in response to the fact that the modem controlled by the BP is in an idle state, determining the cell with the highest signal strength in the second cell set as a target resident cell through the BP;
and sending the network registration request to the target resident cell through the BP.
8. The method according to any of claims 3 to 7, wherein after the camping on the cell by the BP handover based on the cell handover command, the method further comprises:
responding to the success of network registration, and sending a network registration result containing a cell identifier corresponding to the target resident cell to the AP through the BP;
and in response to that the downlink rate in the target resident cell meets the network access condition corresponding to the current application scene, sending a network connection notification to the background server through the AP, wherein the background server updates a normal cell record based on the network connection notification.
9. The method according to any one of claims 1 to 7, wherein after the step of sending a cell switching instruction to the BP through the AP in response to the current downlink rate not satisfying the network access condition corresponding to the current application scenario, the method further comprises:
starting a timer based on the target duration;
and sending the cell switching instruction to the BP through the AP in response to that the timing duration of the timer reaches the target duration and the current downlink rate does not meet the network access condition corresponding to the current application scene.
10. An apparatus for cell selection, the apparatus comprising:
an obtaining module, configured to obtain a current downlink rate and a current application scenario through the AP;
a first sending module, configured to send, in response to that the current downlink rate does not satisfy the network access condition corresponding to the current application scenario, a cell switching instruction to the BP through the AP, where the cell switching instruction is used to instruct the BP to switch a camped cell, and network access conditions corresponding to different application scenarios are different;
and the cell switching module is used for switching the resident cell through the BP based on the cell switching instruction.
11. A terminal, characterized in that the terminal comprises a processor and a memory; stored in the memory is at least one instruction, at least one program, set of codes or set of instructions that is loaded and executed by the processor to implement the cell selection method according to any of claims 1 to 9.
12. A computer-readable storage medium, in which at least one computer program is stored, which is loaded and executed by a processor to implement the cell selection method according to any of claims 1 to 9.
CN202111466493.4A 2021-12-03 2021-12-03 Cell selection method, device, terminal and storage medium Pending CN114125974A (en)

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