WO2023030219A1 - Procédé et dispositif de sélection préférentielle de cellule, terminal et support d'enregistrement - Google Patents

Procédé et dispositif de sélection préférentielle de cellule, terminal et support d'enregistrement Download PDF

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Publication number
WO2023030219A1
WO2023030219A1 PCT/CN2022/115399 CN2022115399W WO2023030219A1 WO 2023030219 A1 WO2023030219 A1 WO 2023030219A1 CN 2022115399 W CN2022115399 W CN 2022115399W WO 2023030219 A1 WO2023030219 A1 WO 2023030219A1
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Prior art keywords
cell
abnormal
threshold
target
neighboring
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PCT/CN2022/115399
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English (en)
Chinese (zh)
Inventor
司广磊
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Oppo广东移动通信有限公司
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Publication of WO2023030219A1 publication Critical patent/WO2023030219A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular to a cell selection method, device, terminal, and storage medium.
  • Cell selection is a process in which a terminal selects a cell that provides high-quality services, and usually occurs in the phases of cell selection, cell reselection, and cell handover.
  • the terminal performs cell measurement based on the measurement configuration issued by the network device, so as to determine the cell to be camped on, the cell to be reselected, or the cell to be handed over from several cells based on the measurement results.
  • Embodiments of the present application provide a cell selection method, device, terminal and storage medium. Described technical scheme is as follows:
  • the embodiment of the present application provides a cell selection method, the method includes:
  • the abnormal cell is determined based on the number of abnormal occurrences of the cell, and the number of abnormal occurrences of the cell includes at least one of the number of radio link failures and the number of secondary cell failures;
  • the cell selection includes at least one of cell selection, cell reselection, and cell switching.
  • an embodiment of the present application provides a cell selection device, the device includes:
  • a determining module configured to determine an abnormal cell, where the abnormal cell is determined based on the number of cell abnormal occurrences, and the number of cell abnormal occurrences includes at least one of the number of radio link failures and the number of secondary cell failures;
  • An optimal selection module configured to perform optimal cell selection based on the abnormal cell, wherein the optimal cell selection includes at least one of optimal cell selection, optimal cell reselection, and optimal cell switching.
  • an embodiment of the present application provides a terminal, the terminal includes a processor and a memory; the memory stores at least one instruction, and the at least one instruction is used to be executed by the processor to implement the above aspects The cell selection method described above.
  • an embodiment of the present application provides a computer-readable storage medium, the storage medium stores at least one instruction, and the at least one instruction is used to be executed by a processor to implement the cell selection method as described in the above aspect .
  • a computer program product includes computer instructions, the computer instructions are stored in a computer-readable storage medium; a processor of a computer device reads from the computer-readable storage medium The computer instructions, when the processor executes the computer instructions, implement the cell selection method as described in the above aspect.
  • Fig. 1 shows a block diagram of a communication system provided by an exemplary embodiment of the present application
  • Fig. 2 shows a structural block diagram of a terminal provided by an exemplary embodiment of the present application
  • FIG. 3 shows a flowchart of a cell selection method provided by an exemplary embodiment of the present application
  • FIG. 4 shows a flowchart of a cell selection method provided by another exemplary embodiment of the present application.
  • FIG. 5 is a flowchart of an abnormal cell determination process shown in an exemplary embodiment of the present application.
  • FIG. 6 is a flowchart of a cell selection process shown in an exemplary embodiment of the present application.
  • FIG. 7 is a flowchart of a cell reselection process shown in an exemplary embodiment of the present application.
  • FIG. 8 is a flowchart of a cell handover process shown in an exemplary embodiment of the present application.
  • FIG. 9 is a schematic diagram of the implementation of a cell handover process shown in an exemplary embodiment of the present application.
  • Fig. 10 is an implementation schematic diagram of a cell handover process shown in another exemplary embodiment of the present application.
  • Fig. 11 is an implementation schematic diagram of a cell handover process shown in another exemplary embodiment of the present application.
  • Fig. 12 shows a structural block diagram of an apparatus for cell selection provided by an embodiment of the present application.
  • the "plurality” mentioned herein means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B may indicate: A exists alone, A and B exist simultaneously, and B exists independently.
  • the character “/” generally indicates that the contextual objects are an "or” relationship.
  • FIG. 1 shows a block diagram of a communication system provided by an exemplary embodiment of the present application.
  • the communication system may include: an access network 12 and a terminal 13 .
  • the access network 12 includes several network devices 120 .
  • the network device 120 may be a base station, which is a device deployed in an access network to provide a terminal with a wireless communication function.
  • the base station may include various forms of macro base stations, micro base stations, relay stations, access points and so on.
  • the names of devices with base station functions may be different, for example, in LTE systems, it is called evolved Node B (eNodeB) or eNB; in 5G new air interface (New Radio, NR) system, called gNodeB or gNB.
  • eNodeB evolved Node B
  • gNodeB 5G new air interface
  • the description "base station” may change.
  • the above-mentioned devices that provide wireless communication functions for the terminal 13 are collectively referred to as network devices.
  • the terminal 13 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, as well as various forms of user equipment, mobile stations (Mobile Station, MS), Terminal (terminal device) and so on.
  • the network device 120 and the terminal 13 communicate with each other through some air interface technology, such as Uu interface.
  • the technical solution of the embodiment of the present application can be applied to various communication systems, such as: Global System of Mobile communication (Global System of Mobile communication, GSM) system, code division multiple access (Code Division Multiple Access, CDMA) system, broadband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (Time Division Duplex, TDD) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, evolution system of NR system, LTE on unlicensed frequency band (LTE-based access to Unlicensed spectrum, LTE-U) system, NR-U system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, Wireless Local Area Networks (Wireless Local Area Networks, WLAN), Wireless Fidelity (Wireless Fidelity, WiFi), next-generation communication systems or other communication systems, etc
  • the cell selection method provided in the embodiment of the present application is used for the terminal 13 in the communication system shown in FIG. 1 .
  • FIG. 2 shows a structural block diagram of a terminal provided by an exemplary embodiment of the present application.
  • the terminal 13 in this application may include one or more of the following components: a processor 131 , a memory 132 , a receiver 133 and a transmitter 134 .
  • Processor 131 may include one or more processing cores.
  • the processor 131 uses various interfaces and lines to connect various parts of the entire terminal 13, and executes the terminal by running or executing instructions, programs, code sets or instruction sets stored in the memory 132, and calling data stored in the memory 132. 13 various functions and processing data.
  • the processor 131 may adopt at least one of Digital Signal Processing (Digital Signal Processing, DSP), Field Programmable Gate Array (Field-Programmable Gate Array, FPGA), and Programmable Logic Array (Programmable Logic Array, PLA). implemented in the form of hardware.
  • the processor 131 may integrate one or more of a central processing unit (Central Processing Unit, CPU), an image processor (Graphics Processing Unit, GPU), a neural network processor (Neural-network Processing Unit, NPU) and a modem, etc.
  • a central processing unit Central Processing Unit, CPU
  • an image processor Graphics Processing Unit, GPU
  • a neural network processor Neural-network Processing Unit, NPU
  • the CPU mainly handles the operating system, user interface and application programs, etc.
  • the GPU is used to render and draw the content that needs to be displayed on the touch screen
  • the NPU is used to realize the artificial intelligence (Artificial Intelligence, AI) function
  • the modem is used to process Wireless communication. It can be understood that, the above-mentioned modem may not be integrated into the processor 131, but may be realized by a single chip.
  • the memory 132 may include a random access memory (Random Access Memory, RAM), and may also include a read-only memory (Read-Only Memory, ROM).
  • the memory 132 includes a non-transitory computer-readable storage medium.
  • Memory 132 may be used to store instructions, programs, codes, sets of codes, or sets of instructions.
  • the memory 1320 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), Instructions and the like for implementing the following method embodiments; the storage data area can store data created according to the use of the terminal 13 (such as audio data, phonebook) and the like.
  • the receiver 133 and the transmitter 134 can be realized as a communication component, and the communication component can be a communication chip.
  • the terminal 13 may also include a display screen.
  • a display is a display component for displaying a user interface.
  • the display screen also has a touch function, through which the user can use any suitable object such as a finger or a touch pen to perform touch operations on the display screen.
  • the terminal in the embodiment of the present application further includes a microphone and a loudspeaker, which will not be repeated in this embodiment.
  • the structure of the terminal 130 shown in the above drawings does not constitute a limitation on the terminal, and the terminal may include more or less components than those shown in the figure, or combine certain components , or different component arrangements.
  • the terminal 13 also includes a camera component, a radio frequency circuit, an input unit, a sensor (such as an acceleration sensor, an angular velocity sensor, a light sensor, etc.), an audio circuit, a wireless fidelity (Wireless Fidelity, WiFi) module, a power supply, a Bluetooth module, etc. components, which will not be repeated here.
  • the terminal when the terminal selects the best cell, it only uses the reference signal receiving power (Reference Signal Receiving Power, RSRP) of the cell as the basis, and does not consider the availability of the cell.
  • RSRP Reference Signal Receiving Power
  • some abnormal cells that cannot provide services for the terminal often appear.
  • the terminal When the cell is optimized to such abnormal cells, the terminal will not be able to obtain services normally.
  • LTE Long Term Evolution
  • SA standalone
  • abnormal cells may frequently experience radio link failure
  • RLF Radio Link Failure
  • Non-StandAlone , NSA non-standalone networking
  • SCG Failure Secondary Cell Group Failure
  • the terminal accesses the above-mentioned abnormal cell, the normal communication service of the terminal will not be possible, and frequent RFL or SCG Failure will increase the power consumption of the terminal.
  • the embodiment of the present application introduces an abnormal cell detection mechanism based on RLF and SCG Failure.
  • the terminal determines the abnormal cells that frequently appear abnormal based on the number of abnormal occurrences, so that When performing cell selection, consider the availability of the cell, eliminate abnormal cells and perform cell selection, avoid selecting the optimal cell to abnormal cells, and improve the quality of cell selection.
  • the following uses an exemplary embodiment for description.
  • FIG. 3 shows a flowchart of a cell selection method provided by an exemplary embodiment of the present application. This embodiment is described by taking the method executed by the terminal 13 shown in FIG. 1 as an example, and the process includes the following steps:
  • Step 302 determining an abnormal cell.
  • the abnormal cell is determined based on the number of cell abnormal occurrences, and the number of cell abnormal occurrences includes at least one of the number of radio link failures and the number of secondary cell failures.
  • the terminal before performing cell selection, cell reselection or cell handover, the terminal first determines the abnormal cell existing in the current area, wherein the abnormal cell can be determined by the terminal based on the history during the camping process.
  • the frequency of occurrence of cell abnormality is determined, or obtained by the terminal through the server (determined and reported by other terminals in the area based on the frequency of occurrence of cell abnormality).
  • the terminal after the terminal is powered on and camps in a cell corresponding to the network standard, it counts the number of cell abnormal occurrences in the cell where it currently resides, so as to determine whether the cell is an abnormal cell.
  • the abnormal cell may be a cell whose number of cell abnormal occurrences reaches a threshold value.
  • the terminal will count the number of wireless link failures, and determine the cell whose number of wireless link failures reaches the threshold as an abnormal cell; if the current resident cell is an NSA cell , the terminal counts the number of secondary cell failures, and determines the cell whose number of secondary cell failures reaches the number threshold as an abnormal cell.
  • this embodiment only uses the above network standard as an example for schematic illustration. In other possible application scenarios, this solution can also be applied to network standards such as 3G or WiFi, which is not limited in this embodiment.
  • Step 304 performing cell selection based on abnormal cells, wherein the cell selection includes at least one of cell selection, cell reselection, and cell switching.
  • the terminal when performing cell selection based on an abnormal cell, the terminal lowers the priority of the abnormal cell, thereby reducing the probability of selecting an abnormal cell; and/or, The terminal excludes the abnormal cell from the optimal selection range, avoids selecting the optimal cell to the abnormal cell, and reduces the probability that the terminal cannot obtain the service after the optimal cell is selected.
  • the cell selection process may include a cell selection process and a cell reselection process in an idle state (idle), and a cell switching process in a connected state (connected).
  • abnormal cells are first determined based on the number of abnormal cell occurrences, and then cell selection is performed based on the determined abnormal cells, and radio link failures or secondary cell failures will frequently occur.
  • the abnormal cells are excluded from the optimal range, avoiding the failure of the terminal to obtain normal services due to selection to abnormal cells, reselection to abnormal cells, and handover to abnormal cells, which helps to improve the quality of service obtained by terminals and avoid frequent wireless links. Failure or failure of the secondary cell leads to increased power consumption of the terminal.
  • determining an abnormal cell includes:
  • the cause of the abnormality is coverage abnormality, determining the target cell as the first abnormal cell;
  • the target cell is determined as the second abnormal cell.
  • performing cell selection based on abnormal cells includes:
  • reducing the cell priority of the first abnormal cell includes:
  • the RSRP value of the first abnormal cell is reduced based on the target penalty value.
  • determining the target cell as the first abnormal cell includes:
  • If the cause of the abnormality is coverage abnormality, determining the target cell as the first abnormal cell within the second duration;
  • determining the target cell as the second abnormal cell includes:
  • the target cell is determined as the second abnormal cell within a third duration, and the third duration is longer than the second duration.
  • the method when the cause of the abnormality is coverage abnormality, after the target cell is determined as the first abnormal cell within the second duration, the method further includes:
  • the target cell is determined as the second abnormal cell within the third time period.
  • determining the target cell as the second abnormal cell within the third time period includes:
  • the target cell determines the target cell as the second abnormal cell within the third time period
  • the method also includes:
  • the target cell When the number of cell abnormality occurrences is greater than the number threshold, and the abnormality is due to abnormal coverage, and the target cell adopts the second access technology, the target cell is determined as the first abnormal cell within the second time period, and the second access technology
  • the evolution predates the evolution of the first access technology.
  • determining the abnormal cell also includes:
  • the number threshold is determined, wherein the number threshold is negatively correlated with the evolution sequence of the access technology.
  • performing cell selection based on the abnormal cell includes:
  • the candidate cell adopts the third access technology, and the minimum access level threshold is smaller than the first customized threshold, determining the first customized threshold as the minimum cell access level threshold of the candidate cell;
  • Cell selection is performed based on the minimum cell access level threshold and cell selection criteria.
  • performing cell selection based on abnormal cells includes:
  • cell reselection is triggered.
  • performing cell selection based on abnormal cells includes:
  • the cell measurement results include the measurement results of the neighboring cells of the target neighboring cell and the measurement results of the serving cell of the serving cell;
  • the serving cell adopts the fourth access technology
  • the target neighboring cell adopts the fifth access technology
  • the evolution of the fourth access technology is earlier than the evolution of the fifth access technology
  • Cell handover based on cell measurement results and customized handover conditions including:
  • the custom handover condition is met, triggering cell handover, and the third custom threshold is higher than the configured threshold .
  • the serving cell adopts the fifth access technology
  • the target neighboring cell adopts the fourth access technology
  • the evolution of the fourth access technology is earlier than the evolution of the fifth access technology
  • Cell handover based on cell measurement results and customized handover conditions including:
  • the serving cell RSRP value of the serving cell is lower than the RSRP threshold, acquiring the neighboring cell RSRP value and the neighboring cell SNR value of the target neighboring cell;
  • the custom handover condition is met, and the cell handover is triggered, and the fifth custom threshold is lower than the configuration threshold of the network device.
  • the serving cell and the neighboring cell use the same access technology
  • Performing cell handover based on the cell measurement result and customized handover conditions including:
  • the serving cell RSRP value of the serving cell reaches the seventh custom threshold, and the serving cell SNR value reaches the eighth custom threshold, acquiring the neighbor cell RSRP value and the neighbor cell SNR value of the target neighbor cell;
  • the causes of the cell abnormality may be different, and correspondingly, recovery conditions of the cell abnormality caused by different reasons are also different.
  • the RLF anomaly may be caused by coverage (for example, the terminal is located at the edge of the cell range), or it may be caused by network configuration (for example, the configured parameters do not conform to the standard protocol);
  • the RLF anomaly caused by network configuration needs to be recovered after parameter reconfiguration, that is, the RLF anomaly caused by coverage is easier to recover than the RLF anomaly caused by network configuration.
  • the terminal further divides the abnormal cells based on the cause of the abnormality, and adopts different strategies for different abnormal cells during cell selection, as shown in the figure 4, the method may include the following steps:
  • Step 401 determine the number of cell abnormality occurrences of the target cell within a first time period.
  • the target cell is the cell where the terminal currently resides.
  • the terminal After the terminal camps on the target cell, it starts a timer of the first duration, and counts the number of cell abnormal occurrences in the target cell, so that when the timer expires, it is determined that the cell abnormality within the first duration Occurrences.
  • the first duration of the timer may be a preset value or a user-defined value, for example, the first duration is 1 minute.
  • the terminal determines the number of radio link failures within the first duration; when the target cell is an NSA cell, the terminal determines the number of secondary cell failures within the first duration.
  • step 402 if the number of cell abnormality occurrences is greater than the number threshold, determine the cause of the abnormality, which includes abnormal network configuration or abnormal coverage.
  • the terminal determines the abnormal cell based on the number of times threshold.
  • the terminal determines that the target cell is an abnormal cell; when the number of cell abnormalities in the target cell within the first time length is less than the number threshold, the terminal determines that the target cell is a normal cell .
  • the terminal sets a unified threshold of times for cells using different access technologies, for example, the thresholds of times corresponding to LTE cells, SA cells, and NSA cells are all set to 6 times.
  • the terminal needs to further determine the cause of the abnormality, so as to further subdivide the abnormal cells according to the reason for the abnormality.
  • the terminal obtains the abnormality cause value when the cell abnormality occurs, so as to determine the abnormality cause based on the abnormality cause value.
  • abnormal causes are divided into two types, which are network configuration abnormality and coverage abnormality.
  • the abnormal network configuration is caused by improper configuration parameters on the network device side (such as SCG configuration failure).
  • Such abnormalities need to be manually reconfigured to recover.
  • the abnormal recovery is difficult and time-consuming; coverage abnormalities are caused by signal coverage. (such as random access failure, downlink out of synchronization), such anomalies can be recovered when the terminal moves, and the difficulty of anomaly recovery is relatively low and time-consuming.
  • the terminal sets the corresponding numbers of times for cells using different access technologies to be the same.
  • the terminal determines the number of times threshold based on the access technology adopted by the target cell, where the number of times threshold is negatively correlated with the evolution sequence of the access technology, that is, the more advanced the access technology adopted by the cell (that is, the closer the evolution sequence is to later), the smaller the number of times threshold corresponding to the cell.
  • LTE cells compared with 5G (including SA cells and NSA cells), LTE cells have better coverage, fewer abnormal cells, and the difference between QoS and 5G cells is smaller, and when 5G When the cell is determined to be an abnormal cell, the terminal can continue to select the LTE cell; and when the LTE cell is determined to be an abnormal cell, the terminal will drop to the 2/3G cell, and the quality of the service provided by the 2/3G cell (such as network access speed) is far worse than LTE cells.
  • the terminal sets the threshold of times corresponding to the LTE cell to 8 times, and the threshold of times corresponding to the SA and NSA cells to 4 times.
  • the terminal determines that the LTE cell is an abnormal cell; and when the number of wireless link failures in the SA cell reaches 4 times within the first time period, the SA cell is identified as an abnormal cell.
  • Step 403 if the cause of the abnormality is coverage abnormality, determine the target cell as the first abnormal cell.
  • the terminal determines the target cell as the first abnormal cell.
  • the terminal determines the LTE cell whose number of radio link failures reaches 6 times within 1 minute, and the radio link failure is caused by abnormal coverage, as the first abnormal cell.
  • Step 404 if the cause of the abnormality is abnormal network configuration, determine the target cell as the second abnormal cell.
  • the terminal determines the target cell as the second abnormal cell.
  • the terminal determines an NSA cell whose number of failures of the secondary cell reaches 6 times within one minute, and the failure of the secondary cell is caused by SCG configuration failure, as the second abnormal cell.
  • Step 405 lowering the cell priority of the first abnormal cell, and adding the second abnormal cell to the blacklist, and the cells in the blacklist are excluded in the process of cell selection, cell reselection and cell switching.
  • the terminal sets different abnormality penalty policies for different types of abnormal cells, and in the cell selection process, the abnormal cell is selected and punished based on the abnormality penalty policy.
  • the first abnormal penalty strategy corresponds to the first abnormal cell
  • the second abnormal penalty strategy corresponds to the second abnormal cell
  • the punishment degree of the second abnormal penalty strategy is higher than that of the first abnormal penalty strategy.
  • the terminal punishes the first abnormal cell by reducing the priority of the cell, that is, the first abnormal cell may still be selected during the cell selection process, but the priority lower than other normal communities.
  • the terminal lowers the RSRP value of the first abnormal cell based on the target penalty value, that is, During the cell selection process, the RSRP value of the first abnormal cell is the actual RSRP measurement value minus the target penalty value. For example, when the target penalty value is 6dbm and the actual RSRP measurement value of the first abnormal cell is -50dbm, during the cell selection process, the RSRP value of the first abnormal cell is -56dbm.
  • the terminal adds the second abnormal cell to the blacklist, and the cells in the blacklist will be selected during the optimal cell selection process. Excluded, that is, the second abnormal cell is barred during the cell selection process, ensuring that the second abnormal cell will not be selected during the cell selection process.
  • Step 406 perform cell selection based on the blacklist.
  • the terminal After punishing the first abnormal cell and the second abnormal cell through the above steps, the terminal performs cell selection based on the blacklist, and excludes the second abnormal cell from the range of cell selection.
  • the terminal subdivides the abnormal cells into the first abnormal cell which is abnormally easy to recover and the second abnormal cell which is difficult to recover based on the abnormal cause of the cell abnormality, and during the cell selection process, the first abnormal cell It adopts a different punishment mechanism from the second abnormal cell, which improves the rationality of the cell selection process.
  • the terminal before judging the abnormal cell, determines the threshold value of the number of times used to measure the abnormal cell based on the access technology adopted by the cell, avoiding the use of a unified measurement index for all cells, and further improving the determination of the abnormal cell. The rationality, and then improve the quality of the cell selection process.
  • the terminal determines the target cell as the first abnormal cell within the second duration , when the cause of the abnormality is abnormal network configuration, the terminal determines the target cell as the second abnormal cell within the third duration, and since the recovery time of abnormal network configuration is often higher than that of abnormal coverage, the third duration is longer than the second duration.
  • the second duration is 10 minutes
  • the third duration is 4 hours.
  • the terminal increases the cell selection penalty for the target cell.
  • the terminal determines again the number of cell abnormal occurrences of the target cell within the first time period, In the case that the number of occurrences of cell abnormality is greater than the number of times threshold and the cause of the abnormality is coverage abnormality, the terminal determines the target cell as the second abnormal cell within the third time period.
  • the process for the terminal to determine the number of occurrences of the cell abnormality and the cause of the abnormality may refer to the foregoing embodiment, and details are not described in this embodiment here.
  • the terminal detects that the coverage of the target cell is abnormal again, it needs to combine the access technology adopted by the target cell to determine whether the target cell needs to be The cell is determined as the second abnormal cell.
  • the terminal determines the target cell as the first access technology within the third duration.
  • the terminal determines the target cell as the first abnormal cell within the second duration, wherein the second access
  • the evolution of the access technology is earlier than the evolution of the first access technology.
  • the first access technology is LTE technology
  • the second access technology is NR technology, that is, when coverage abnormality occurs in the LTE cell again, the terminal continues to determine the LTE cell as the first abnormal cell, and will not Increase the optimal penalty for LTE cells; when coverage abnormality occurs in the SA cell again, the terminal continues to determine the SA cell as the second abnormal cell, and increases the optimal penalty for the LTE cell.
  • the process for the terminal to determine the abnormal cell includes:
  • the camped cell is an LTE cell, detect whether the number of RLFs in the LTE cell reaches 8 times within 1 minute. If it is reached, execute step 503, if not, end and determine that the LTE cell is a normal cell.
  • step 506 If the camped cell is an SA cell, detect that the number of RLFs in the SA cell within 1 minute reaches 4 times. If it is reached, execute step 507, if not, end and determine that the SA cell is a normal cell.
  • step 507. Detect whether the cause of the RLF is abnormal network configuration. If the network configuration is not abnormal, execute step 508, and if the network configuration is abnormal, execute step 510.
  • step 510 Detect whether the number of RLFs of the SA cell reaches 4 again. If it is reached, execute step 510, and if not, end.
  • step 512 If the camping cell is an NSA cell, detect that the number of SCG failures of the NSA cell reaches 4 times within 1 minute. If yes, execute step 512, if not, end, and determine that the NSA cell is a normal cell.
  • step 514 Detect whether the number of SCG failures of the NSA cell reaches 4 times again. If it is reached, execute step 515, and if not, end.
  • an LTE cell, an SA cell, and an NSA cell are taken as examples for schematic description, but this is not limited thereto.
  • the foregoing embodiments describe the process of determining an abnormal cell, and the following uses the embodiments to describe the process of cell selection, cell reselection, and cell handover after the abnormal cell is determined.
  • FIG. 6 shows a flowchart of a cell selection process provided by an exemplary embodiment of the present application.
  • the process includes the following steps:
  • Step 601 determine candidate cells based on abnormal cells.
  • the terminal determines cells other than the second abnormal cell as candidate cells (including the first abnormal cell).
  • Step 602 acquiring the minimum access level threshold configured by the network device for the candidate cell.
  • Qrxlevmeas is the RSRP value of the candidate cell
  • Qrxlevmin and Qrxlevminoffset are the minimum access level threshold (configured in SIB1) and the offset value of the minimum access level configured in the SIB, respectively;
  • Pcompensation is the maximum value between the maximum usable transmit power PEMAX of the terminal minus the maximum radio frequency output power PUMAX of the terminal, and 0 (that is, MAX(PEMAX-PUMAX, 0)).
  • the values of Qrxlevminoffset and Pcompensation are generally zero.
  • the simple understanding of the S criterion is that the measurement level of a cell is greater than Qrxlevmin, and the cell meets the camping condition.
  • the terminal in order to determine whether the candidate cell satisfies the camping condition, obtains the minimum access level threshold configured for each candidate cell from the SIB1 issued by the network device.
  • Step 603 if the candidate cell adopts the third access technology and the minimum access level threshold is smaller than the first customized threshold, determine the first customized threshold as the minimum cell access level threshold of the candidate cell.
  • the terminal determines that the candidate cell can camp on.
  • the network device In order to make the terminal preferentially camp on a cell using the latest access technology (such as a 5G cell), the network device usually configures a lower minimum access level threshold for such a cell.
  • terminals can easily access weak signal cells using the latest access technology, but in reality, the communication quality of terminals in such weak signal cells is not as good as that of strong signal cells using non-latest access technologies. For example, the communication experience of a terminal in a 5G weak signal cell is not as good as that in an LTE strong signal cell.
  • the terminal sets a customized minimum access level threshold for the cell using the third access technology.
  • the first customized threshold is determined as the minimum access level of the candidate cell. flat threshold.
  • the terminal determines the minimum access level threshold configured by the network as the minimum access level threshold of the candidate cell .
  • the first customized threshold is usually higher than the minimum access level threshold configured by the network side for cells adopting the third access technology.
  • the minimum access level threshold configured by the network device is -120dbm
  • the minimum access level threshold customized by the terminal for the 5G cell is -110dbm.
  • the above-mentioned embodiment only takes the third access technology as 5G technology as an example for illustration, and in other possible embodiments, the third access technology may be other latest communication technologies, which is not discussed in this embodiment. limited.
  • Step 604 perform cell selection based on the minimum cell access level threshold and cell selection criteria.
  • the terminal determines that the candidate cell meets the camping condition; when the RSRP measurement value of the candidate cell does not reach the minimum access level threshold of the cell, the terminal determines the candidate cell The cell does not meet the residency conditions.
  • the terminal needs to punish the actual RSRP measurement value of the candidate cell, and detect whether the punished RSRP measurement value reaches the minimum access level threshold of the cell.
  • the terminal selects a cell based on the customized minimum access level threshold, which prevents the terminal from camping in a weak-signal cell using the latest access technology, and helps to improve the communication quality of the terminal after camping.
  • FIG. 7 shows a flowchart of a cell reselection process provided by an exemplary embodiment of the present application. The process includes the following steps:
  • Step 701 determine a target neighboring cell based on the abnormal cell.
  • the terminal determines neighboring cells other than the second abnormal cell as target neighboring cells (including the first abnormal cell).
  • Step 702 acquiring the RSRP value of the neighboring cell and the SNR value of the neighboring cell of the target neighboring cell.
  • the criterion for cell reselection is called the R criterion, and the Rs of the serving cell and the Rn of the neighboring cell satisfy respectively
  • Qmeas,s is the RSRP measurement value of the serving cell
  • Qmeas,n is the RSRP measurement value of the neighbor cell
  • Qoffset defines the offset value of the neighbor cell
  • QHyst is the cell reselection hysteresis.
  • the terminal may reselect to an adjacent cell with strong interference.
  • SNR Signal-to-Noise Ratio
  • the terminal optimizes the cell reselection process, and uses the RSRP and SNR of neighboring cells as the basis for cell reselection. Therefore, after the target neighbor cell is determined, the terminal measures the target neighbor cell to obtain the neighbor cell RSRP value and the neighbor cell SNR value of the target neighbor cell.
  • Step 703 when the RSRP value of the neighboring cell satisfies the cell reselection criteria and the SNR value of the neighboring cell reaches the second customized threshold, triggering cell reselection.
  • a customized SNR threshold (such as 40dB) is set in the terminal.
  • the terminal detects whether the RSRP value of the neighboring cell satisfies the cell reselection criterion, and detects whether the SNR value of the neighboring cell reaches the second custom threshold (i.e., the SNR custom threshold). If the value satisfies the cell reselection criterion, and the SNR value of the neighboring cell reaches the second customized threshold (need to reach Treselection), the terminal triggers cell reselection.
  • the terminal needs to perform penalty processing on the actual RSRP measurement value of the target neighboring cell, and detect whether the punished RSRP measurement value satisfies the cell reselection criterion.
  • the terminal takes the signal strength and interference of neighboring cells into consideration during the cell reselection process, avoiding the terminal reselecting a cell with strong interference, and helping to improve the efficiency of terminal reselection. subsequent communication quality.
  • FIG. 8 shows a flow chart of a cell handover process provided by an exemplary embodiment of the present application.
  • the process includes the following steps:
  • Step 801 determine a target neighboring cell based on the abnormal cell.
  • the terminal determines neighboring cells other than the second abnormal cell as target neighboring cells (including the first abnormal cell).
  • Step 802 Perform cell measurement based on the measurement configuration delivered by the network device to obtain cell measurement results, which include the measurement results of neighboring cells of the target neighboring cell and the measurement results of the serving cell of the serving cell.
  • the terminal measures the serving cell and the neighboring cell respectively based on the measurement configuration sent by the network device corresponding to the current serving cell, and obtains the measurement result of the serving cell and the neighboring cell.
  • the serving cell measurement result includes the serving cell RSRP value
  • the neighboring cell measurement result includes the neighboring cell RSRP value.
  • the terminal in order to avoid switching to a neighbor cell with strong interference, the terminal also needs to perform SNR measurement on the serving cell and the neighbor cell during the cell measurement process to obtain the SNR value of the serving cell and the SNR value of the neighbor cell.
  • Step 803 perform cell handover based on the cell measurement result and customized handover conditions.
  • Cell handover can be divided into intra-system handover (such as 5G ⁇ LTE) and inter-system handover (such as LTE ⁇ LTE).
  • Intra-system handover is generally based on A3/A4/A5 events
  • inter-system handover is generally based on B1/B2 events.
  • Event A3 (Neighbour becomes offset better than serving): Indicates that the quality of the same-frequency/different-frequency neighboring cell is higher than that of the serving cell.
  • the source cell initiates a handover request (usually coverage-based handover);
  • Event A4 Indicates that the quality of inter-frequency neighboring cells is higher than a certain threshold. When an event meeting this condition is reported, the source cell initiates an inter-frequency handover request (usually based on load balancing);
  • Event A5 (Serving becomes worse than threshold1 and neighbor becomes better than threshold2): indicates that the quality of the serving cell is lower than a certain threshold and the quality of the neighboring cell is higher than a certain threshold;
  • Event B2 (Serving becomes worse than threshold1 and inter RAT neighbor becomes better than threshold2): indicates that the quality of the serving cell is lower than a certain threshold and the quality of the inter-system neighboring cell is higher than a certain threshold.
  • the terminal when the signal strength of the serving cell is lower than the threshold value, the terminal will report the measurement report of A2 to the network, triggering the network to start inter-frequency/inter-system measurement.
  • the terminal When the signal strength of the adjacent cell is low, the terminal will report the measurement report of A3 to the base station. After receiving the measurement report of A3, the base station will issue a handover command including a reconfiguration message to the terminal, instructing the terminal to switch to the adjacent cell.
  • the network device usually configures a lower threshold for such a cell, which makes it easy for the terminal to switch to a weak cell, affecting the normal communication of the terminal .
  • the terminal is set with a customized handover condition, and correspondingly, the terminal triggers the cell handover based on the cell measurement result and the customized handover condition.
  • different cell handover scenarios correspond to different customized handover conditions, and the customized handover conditions customize the threshold values of RSRP and SNR.
  • the cell The switching process may include the following steps.
  • the terminal when the terminal is currently camping on the serving cell using the fourth access technology, and the target neighboring cell uses the fifth access technology, the terminal performs measurement based on the measurement configuration (B1 event measurement configuration) issued by the serving cell. After the target neighbor cell is measured, it is detected whether the neighbor cell RSRP value of the target neighbor cell reaches the configured threshold, and whether the duration reaches the configured duration (Time To Trigger, TTT). If not, it is determined that the target neighboring cell does not satisfy the cell handover condition.
  • the measurement configuration B1 event measurement configuration
  • TTT Time To Trigger
  • the network device in order to make the terminal preferentially switch to the cell using the latest access technology (such as residing in a 5G cell), the network device usually configures a lower minimum access level threshold for this type of cell.
  • the terminal is easy to switch to a weak-signal cell using the latest access technology, but in reality, the communication quality of the terminal in such a weak-signal cell is not as good as a strong-signal cell using a non-latest access technology.
  • the communication experience of a terminal in a 5G weak signal cell is not as good as that in an LTE strong signal cell.
  • the terminal needs to further detect whether the target neighboring cell satisfies the customized cell handover condition. Moreover, in order to avoid switching to a cell with strong interference, the terminal needs to further obtain the SNR value of the neighboring cell of the neighboring cell.
  • the terminal When the RSRP value of the neighboring cell of the target neighboring cell satisfies the cell handover condition configured by the network device, the terminal further obtains the SNR value of the neighboring cell, and determines whether the target neighboring cell meets the customized cell handover condition based on the RSRP value of the neighboring cell and the SNR value of the neighboring cell .
  • the third custom threshold is higher than Configure thresholds.
  • the customized cell switching conditions set by the terminal include customized RSRP conditions and customized SNR conditions.
  • the RSRP value of the neighboring cell reaches the third custom threshold and the duration reaches the configured duration (such as 1 minute)
  • the terminal determines that the target neighboring cell meets the customized RSRP condition;
  • the SNR value of the neighboring cell reaches the fourth custom threshold (such as 30dB)
  • the terminal determines that the target neighboring cell satisfies the customized SNR condition.
  • the third custom threshold is higher than the configuration threshold of the network device, for example, the configuration threshold of the network device is -120dbm, and the third custom threshold is -110dbm.
  • the terminal reports a measurement report to the network device, triggering cell handover.
  • the cell handover process may include the following steps:
  • Step 901 according to the measurement configuration of B1 delivered by the LTE cell, perform cell measurement on the SA neighboring cell.
  • Step 902 detecting whether the RSRP value of the SA neighboring cell reaches the configured threshold and lasts for TTT time. If it is reached, execute step 903, and if not, end (the cell switching condition is not met).
  • Step 903 detecting whether the RSRP value of the SA neighboring cell reaches the third custom threshold, and whether the SNR value reaches the fourth custom threshold, and lasts for TTT time. If it is reached, execute step 904, and if not, end (the custom switching condition is not satisfied).
  • Step 904 report B1 measurement report, and trigger handover.
  • the cell switching process may include the following steps.
  • the serving cell RSRP value of the serving cell is lower than the RSRP threshold, obtain the neighboring cell RSRP value and the neighboring cell SNR value of the target neighboring cell.
  • the terminal needs to delay handover, that is, to prevent the terminal from switching to a target neighboring cell with a weak signal
  • the terminal needs to accelerate the handover in the cell handover scenario in this embodiment, that is, to prevent the terminal from staying in a weak signal service district.
  • the terminal when the terminal is currently camping on the serving cell using the fifth access technology, and the target neighboring cell uses the fourth access technology, the terminal performs measurement based on the measurement configuration (B1 event measurement configuration) issued by the serving cell.
  • the target neighboring cell performs measurement, and when the serving cell RSRP value of the serving cell is lower than the RSRP threshold, obtains the neighboring cell RSRP value and the neighboring cell SNR value of the target neighboring cell.
  • the custom handover condition is met, triggering cell handover, and the fifth custom threshold is lower than the configuration threshold of the network device.
  • the customized cell switching conditions set by the terminal include customized RSRP conditions and customized SNR conditions.
  • the terminal determines that the target neighboring cell meets the customized RSRP condition; when the adjacent cell SNR value reaches the sixth customized threshold (such as 30dB), and the duration reaches the configured When the time is long, the terminal determines that the target neighboring cell satisfies the customized SNR condition.
  • the fifth custom threshold is lower than the configuration threshold of the network device, for example, the configuration threshold of the network device is -80dbm, while the fifth custom threshold is -90dbm.
  • the terminal reports a measurement report to the network device, triggering cell handover.
  • the cell handover process may include the following steps:
  • Step 1001 according to the measurement configuration of B1 delivered by the SA cell, perform cell measurement on the LTE neighbor cell.
  • Step 1002 check whether the RSRP value of the LTE neighbor cell meets the B1 threshold and lasts for TTT time. If it is satisfied, execute step 1003, and if it is not satisfied, end (the cell switching condition is not satisfied).
  • Step 1003 when the RSRP value of the SA cell is lower than the RSRP threshold, it is detected whether the RSRP value of the LTE neighbor cell reaches the fifth custom threshold, and the SNR value reaches the sixth custom threshold. If it is reached, execute step 1004, and if not, end (custom switching condition is not met).
  • Step 1004 report B1 measurement report, and trigger handover.
  • the cell switching process may include the following steps.
  • the serving cell RSRP value of the serving cell reaches the seventh custom threshold and the serving cell SNR value reaches the eighth custom threshold, obtain the neighbor cell RSRP value and neighbor cell SNR value of the target neighbor cell.
  • the idea of handover optimization between cells under the same access technology is: when the RSRP and SNR of the serving cell reach the customized threshold, the serving cell is considered to be able to provide effective services, and when the RSRP or SNR of the neighboring cell does not reach the customized threshold, the neighboring cell is considered If effective services cannot be provided, the handover will be delayed; if the RSRP and SNR of the neighboring cell reach the customized threshold, the neighboring cell will be considered to be able to provide effective services, and the handover process will be triggered.
  • the terminal is set with customization conditions for measuring whether the serving cell can provide effective services, and the customization conditions are composed of RSRP customization conditions and SNR customization conditions.
  • the terminal determines that the RSRP customization condition and the SNR customization condition are met.
  • the seventh custom threshold and the eighth custom threshold may be set by a developer based on experience, which is not limited in this embodiment.
  • the terminal is set with customized conditions for measuring whether the neighboring cells can provide effective services, and the customized conditions are also composed of RSRP customized conditions and SNR customized conditions.
  • the RSRP value of the neighboring cell reaches the ninth custom threshold (such as -60dbm), and the SNR value of the neighboring cell reaches the tenth custom threshold (such as 30dB), it is determined that the custom handover condition is met, and the cell handover is triggered; when the neighboring cell RSRP value If the ninth custom threshold is not reached, or the SNR value of the neighboring cell does not reach the tenth custom threshold, it is determined that the custom handover condition is not met, and the handover trigger is delayed.
  • the ninth custom threshold and the tenth custom threshold may be set by developers based on experience, which is not limited in this embodiment.
  • the cell handover process may include the following steps:
  • Step 1101 according to the A3/A4/A5 measurement configuration issued by the SA serving cell, perform cell measurement on the SA neighboring cell.
  • Step 1102 detecting whether the RSRP of the SA serving cell is greater than the seventh custom threshold and the SNR is greater than the eighth custom threshold. If greater, execute step 1103, and if less, end.
  • Step 1103 detecting whether the RSRP of the SA neighboring cell is smaller than the ninth custom threshold, or whether the SNR is smaller than the tenth custom threshold. If less, execute step 1104; if both are greater, end (trigger cell handover).
  • Step 1104 do not report the measurement report, and delay triggering the handover.
  • FIG. 12 shows a structural block diagram of an apparatus for cell selection provided by an embodiment of the present application.
  • This device can be implemented as all or part of the terminal 13 in FIG. 1 through software, hardware or a combination of the two.
  • the unit includes:
  • a determining module 1201 configured to determine an abnormal cell, where the abnormal cell is determined based on the number of abnormal occurrences of the cell, and the number of abnormal occurrences of the cell includes at least one of the number of radio link failures and the number of secondary cell failures;
  • An optimal selection module 1202 configured to perform optimal cell selection based on the abnormal cell, wherein the optimal cell selection includes at least one of optimal cell selection, optimal cell reselection, and optimal cell switching.
  • the determination module 1201 includes:
  • a first determining unit configured to determine the number of abnormal occurrences of the cell of the target cell within the first time period
  • the second determination unit is configured to determine the cause of the abnormality when the number of abnormal occurrences of the cell is greater than the number of times threshold, and the abnormal cause includes abnormal network configuration or abnormal coverage;
  • a third determining unit configured to determine the target cell as a first abnormal cell when the abnormal cause is coverage abnormality
  • a fourth determining unit configured to determine the target cell as a second abnormal cell when the abnormality cause is an abnormal network configuration.
  • the optimal selection module 1202 is specifically used for:
  • the cell selection is performed based on the blacklist.
  • the optimal selection module 1202 is configured to:
  • the third determining unit is specifically used for:
  • If the cause of the abnormality is coverage abnormality, determining the target cell as the first abnormal cell within a second duration;
  • the fourth determining unit is specifically used for:
  • the target cell is determined as the second abnormal cell within a third duration, and the third duration is longer than the second duration.
  • the first determination unit is further configured to determine again the number of abnormal cell occurrences of the target cell within the first time period when the second time period is reached;
  • the fourth determination unit is further configured to determine the target cell as the target cell within the third duration when the number of cell abnormality occurrences is greater than the number threshold and the cause of the abnormality is coverage abnormality. Describe the second abnormal cell.
  • the fourth determining unit is specifically used for:
  • the target cell determines the target cell as the target cell within a third duration.
  • the second abnormal cell When the number of abnormal occurrences of the cell is greater than the number threshold, and the abnormal cause is coverage abnormality, and the target cell adopts the first access technology, determine the target cell as the target cell within a third duration.
  • the second abnormal cell When the number of abnormal occurrences of the cell is greater than the number threshold, and the abnormal cause is coverage abnormality, and the target cell adopts the first access technology, determine the target cell as the target cell within a third duration.
  • the third determination unit is also used for:
  • the target cell adopts the second access technology
  • the evolution of the second access technology is earlier than the evolution of the first access technology.
  • the determining module 1201 also includes:
  • the fifth determining module is configured to determine the times threshold based on the access technology adopted by the target cell, wherein the times threshold is negatively correlated with the evolution order of the access technologies.
  • the optimal selection module 1202 includes:
  • a sixth determining unit configured to determine a candidate cell based on the abnormal cell
  • a first acquiring unit configured to acquire the minimum access level threshold configured by the network device for the candidate cell
  • a seventh determining unit configured to determine the first customized threshold as the candidate cell when the candidate cell adopts the third access technology and the minimum access level threshold is smaller than the first customized threshold The minimum access level threshold of the cell;
  • a selecting unit configured to select a cell based on the minimum cell access level threshold and a cell selection criterion.
  • the optimal selection module 1202 includes:
  • An eighth determining unit configured to determine a target neighboring cell based on the abnormal cell
  • a second acquiring unit configured to acquire the RSRP value of the neighboring cell and the SNR value of the neighboring cell of the target neighboring cell;
  • a reselection unit configured to trigger cell reselection when the RSRP value of the neighboring cell satisfies a cell reselection criterion and the SNR value of the neighboring cell reaches a second custom threshold.
  • the optimal selection module 1202 includes:
  • a ninth determining unit configured to determine a target neighboring cell based on the abnormal cell
  • the third acquisition unit is configured to perform cell measurement based on the measurement configuration issued by the network device, and obtain a cell measurement result, the cell measurement result including the neighbor cell measurement result of the target neighbor cell and the serving cell measurement result of the serving cell;
  • a handover unit configured to perform cell handover based on the cell measurement result and customized handover conditions.
  • the serving cell adopts a fourth access technology
  • the target neighboring cell adopts a fifth access technology
  • the evolution of the fourth access technology is earlier than the evolution of the fifth access technology
  • the switching unit is used for:
  • the RSRP value of the neighboring cell reaches the third custom threshold, and the SNR value of the neighboring cell reaches the fourth custom threshold, and the duration reaches the configured duration, it is determined that the custom handover condition is met, and cell handover is triggered, the The third customized threshold is higher than the configured threshold.
  • the serving cell adopts a fifth access technology
  • the target neighboring cell adopts a fourth access technology
  • the evolution of the fourth access technology is earlier than the evolution of the fifth access technology
  • the switching unit is used for:
  • the serving cell RSRP value of the serving cell is lower than the RSRP threshold, acquiring the neighboring cell RSRP value and the neighboring cell SNR value of the target neighboring cell;
  • the custom handover condition is met, and cell handover is triggered, and the fifth custom threshold is lower than the network The configuration threshold of the device.
  • the serving cell and the neighboring cell use the same access technology
  • the switching unit is used for:
  • the serving cell RSRP value of the serving cell reaches the seventh custom threshold, and the serving cell SNR value reaches the eighth custom threshold, acquire the neighboring cell RSRP value and neighboring cell SNR value of the target neighboring cell;
  • abnormal cells are first determined based on the number of abnormal cell occurrences, and then cell selection is performed based on the determined abnormal cells, and abnormal cells with frequent radio link failures or secondary cell failures are excluded. Outside the optimal range, avoid the failure of the terminal to obtain normal services due to selection to an abnormal cell, reselection to an abnormal cell, or handover to an abnormal cell, which helps to improve the quality of service obtained by the terminal and avoid frequent wireless link failures or secondary cell failures resulting in increased terminal power consumption.
  • the embodiment of the present application also provides a computer-readable medium, the computer-readable medium stores at least one instruction, and the at least one instruction is loaded and executed by a processor to implement the cell selection method described in each of the above embodiments.
  • the embodiment of the present application also provides a computer program product, the computer program product includes computer instructions, and the computer instructions are stored in a computer-readable storage medium; a processor of a computer device reads the computer-readable storage medium from the computer-readable storage medium.
  • the computer instruction when the processor executes the computer instruction, implements the cell selection method as described in the above embodiment.
  • the functions described in the embodiments of the present application may be implemented by hardware, software, firmware or any combination thereof.
  • the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage media may be any available media that can be accessed by a general purpose or special purpose computer.

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Abstract

Procédé et dispositif de sélection préférentielle de cellule, terminal et support d'enregistrement appartenant au domaine technique des communications. Le procédé comprend : la détermination d'une cellule anormale, la cellule anormale étant déterminée sur la base du nombre de fois qu'une anomalie de cellule se produit, et le nombre de fois qu'une anomalie de cellule se produit comprenant le nombre d'instances de défaillance de liaison radio et/ou le nombre de fois qu'une cellule secondaire échoue (302) ; et la réalisation d'une sélection préférentielle de cellule sur la base de la cellule anormale, ladite sélection préférentielle de cellule comprenant une sélection préférentielle de sélection de cellule et/ou une sélection préférentielle de resélection de cellule et/ou une sélection préférentielle de transfert de cellule (304). La solution fournie dans les modes de réalisation de la présente demande est utile pour améliorer la qualité de service atteinte par un terminal, et empêcher la consommation d'énergie de terminal d'augmenter en raison d'une défaillance de liaison sans fil ou d'une défaillance de cellule secondaire fréquente.
PCT/CN2022/115399 2021-09-02 2022-08-29 Procédé et dispositif de sélection préférentielle de cellule, terminal et support d'enregistrement WO2023030219A1 (fr)

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