Lightweight terminal cell selection and reselection method and related equipment

Abstract

The invention provides a lightweight terminal cell selection and reselection method and related equipment. The lightweight terminal cell selection and reselection method comprises the following steps: when a lightweight terminal enters an idle state or an inactive state from a connected state, generating a candidate cell list based on a pre-stored successfully switched cell list and a cell list with switching conditions; attempting to camp on a cell in the candidate cell list based on the candidate cell list; and in response to determining that all the cells in the candidate cell list fail to reside, starting frequency band scanning to select the resident cell.

Description

Technical Field

[0001] The present disclosure relates to the field of mobile communication technology, and in particular to a lightweight terminal cell selection and reselection method and related equipment. Background Art

[0002] The Reduced Capability (RedCap) terminal is a lightweight 5G device introduced by the 3GPP R17 standard, which is designed to provide efficient services for a variety of consumer scenarios and industry application scenarios. On the other hand, 3GPP stipulates that the 5G new air interface includes two major spectrum ranges, namely FR1 and FR2. In terms of bandwidth capability, the bandwidth capability of the RedCap terminal does not exceed 20MHz when it resides in the FR1 cell, and does not exceed 100MHz when it resides in the FR2 cell. The bandwidth capability of non-RedCap terminals (that is, traditional terminals) can exceed 20MHz when they reside in the FR1 cell, and can exceed 100MHz when they reside in the FR2 cell. In other words, according to the 3GPP protocol, RedCap terminals can only access cells that support the above bandwidth capabilities, referred to as RedCap cells, that is, the bandwidth of the FR1 cell does not exceed 20MHz, and the bandwidth of the FR2 cell does not exceed 100MHz. However, since most current 5G networks are based on 3GPP R15 or R16 standards, RedCap cells that support the above bandwidth capabilities are not fully covered, and it is difficult for mobile communication operators to complete the full network upgrade in the short term, resulting in RedCap terminals taking a long time to select cells, consuming more power, and having a poor user experience. Therefore, how to enable RedCap terminals to access RedCap cells as quickly as possible and improve user experience has become an important research and optimization direction for cell selection and cell reselection in RedCap terminal mobility management. Summary of the invention

[0003] In view of this, the embodiments of the present disclosure provide a lightweight terminal cell selection and reselection method and related equipment, which can enable a lightweight terminal to quickly access a RedCap cell that supports lightweight terminal bandwidth capabilities, reduce lightweight terminal access delay and power consumption, and thus greatly improve the user experience.

[0004] The lightweight terminal cell selection and reselection method described in the embodiment of the present disclosure may include: when the lightweight terminal enters an idle state or an inactive state from a connected state, generating a candidate cell list based on a pre-stored list of successful switching cells and a list of cells with switching conditions; based on the candidate cell list, attempting to reside in a cell in the candidate cell list; and in response to determining that all cells in the candidate cell list have failed to reside, initiating a frequency band scan to select a cell to reside in.

[0005] In an embodiment of the present disclosure, the list of cells that have been successfully switched and the list of cells that have switching conditions include multiple cell information; wherein the cell information includes: cell identification, cell frequency, cell frequency band, bandwidth, signal quality and other parameters; generating a candidate cell list includes: sorting the cells in the list of cells that have been successfully switched and the list of cells that have switching conditions in order from good to bad according to the signal quality in the cell information; and adding the cells in the list of cells that have been successfully switched and the list of cells that have switching conditions to the candidate cell list in sequence according to the sorted order.

[0006] The method described in the embodiment of the present disclosure further includes: in the process of sorting, for cells with the same signal quality, based on the cell frequency in the cell information, the cell with the same frequency as the cell where the lightweight terminal resides when leaving the connected state is sorted in front.

[0007] In an embodiment of the present disclosure, attempting to reside in a cell in the candidate cell list based on the candidate cell list includes: selecting the cell with the best signal quality from the candidate cell list as the target cell; attempting to reside in the target cell; in response to determining that the residency in the target cell is successful, ending; and in response to determining that the residency in the target cell fails, deleting the target cell from the candidate cell list and returning to the step of selecting the cell with the best signal quality from the candidate cell list as the target cell.

[0008] In an embodiment of the present disclosure, the initiating frequency band scanning to select a cell to reside in includes: reading a pre-stored list of prohibited access cells; determining a target cell to attempt to reside in through frequency band scanning; comparing the cell identifier of the target cell with the cell identifiers of each cell recorded in the prohibited access cell list; in response to determining that the target cell is a cell in the prohibited access cell list, skipping the target cell and returning to the step of determining the target cell to attempt to reside in through frequency band scanning; in response to determining that the target cell is not a cell in the prohibited access cell list, attempting to reside in the target cell; in response to determining that residency in the target cell fails, returning to the step of determining the target cell to attempt to reside in through frequency band scanning; and in response to determining that residency in the target cell is successful, ending.

[0009] The method described in the embodiment of the present disclosure further includes: receiving an indication to switch to a target cell; determining whether the bandwidth of the target cell supports the bandwidth capability of the lightweight terminal; in response to determining that the bandwidth of the target cell cannot support the bandwidth capability of the lightweight terminal, executing a switching failure process; in response to determining that the bandwidth of the target cell can support the bandwidth capability of the lightweight terminal, executing a switch to the target cell; in response to a successful switch, adding the information of the target cell to the successful switch cell list; and in response to a switching failure, executing the switching failure process.

[0010] The method described in the embodiment of the present disclosure further includes: in response to determining that the bandwidth of the target cell cannot support the bandwidth capability of the lightweight terminal, adding the information of the target cell to a prohibited access cell list.

[0011] The method described in the embodiment of the present disclosure further includes: receiving an RRC reconfiguration message sent by the network side; wherein the RRC reconfiguration message includes the configuration of at least one conditional switching candidate cell; evaluating the conditional switching execution condition of the candidate cell; determining whether the bandwidth of all candidate cells that meet the conditional switching execution condition supports the bandwidth capability of the lightweight terminal; and adding the information of all candidate cells that support the bandwidth capability of the lightweight terminal to the conditional switching cell list.

[0012] The method described in the embodiment of the present disclosure further includes: adding information of all candidate cells that cannot support the bandwidth capability of the lightweight terminal to a prohibited access cell list.

[0013] Corresponding to the above lightweight terminal cell selection and reselection method, some embodiments of the present disclosure further disclose a lightweight terminal cell selection and reselection device, including: A candidate cell list generation module, configured to generate a candidate cell list based on a pre-stored list of successful switching cells and a list of cells with switching conditions when the lightweight terminal enters an idle state or an inactive state from a connected state; a cell selection module, configured to attempt to reside in a cell in a candidate cell list based on the candidate cell list; and The frequency scanning module is used for starting frequency band scanning to select a cell to reside in in response to determining that all cells in the candidate cell list have failed to reside.

[0014] In addition, an embodiment of the present disclosure further provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned lightweight terminal cell selection and reselection method when executing the program.

[0015] An embodiment of the present disclosure further provides a non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the above-mentioned lightweight terminal cell selection and reselection method.

[0016] An embodiment of the present disclosure further provides a computer program product, including computer program instructions. When the computer program instructions are executed on a computer, the computer executes the above-mentioned lightweight terminal cell selection and reselection method.

[0017] In the above-mentioned lightweight terminal cell selection and reselection method and related equipment, the lightweight terminal records and maintains the switching successful cell list (HOList) and the cell list with switching conditions (CHOCelllist) in the connected state, so that the lightweight terminal can preferentially try to access the cells in the switching successful cell list (HOList) and the cell list with switching conditions (CHOCelllist) when entering the idle state or inactive state. And because the cells in the switching successful cell list (HOList) and the cell list with switching conditions (CHOCelllist) are all determined to be cells that can support the bandwidth capabilities of the lightweight terminal, therefore, compared with the method of directly scanning the frequency band to select the cell by the lightweight terminal, it is usually possible to access the cell more quickly with a higher probability. In other words, the above-mentioned lightweight terminal cell selection and reselection method can effectively improve the probability of the lightweight terminal staying in the lightweight terminal can stay in the cell in the current 5G network environment, thereby greatly improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present disclosure or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 The implementation process of the lightweight terminal cell selection and reselection method described in the embodiment of the present disclosure is shown.

[0020] Figure 2 The implementation flow of the method for attempting to reside in a cell in the candidate cell list based on the generated candidate cell list according to the embodiment of the present disclosure is shown.

[0021] Figure 3 The implementation process of the method for selecting a cell by frequency band scanning described in an embodiment of the present disclosure is shown.

[0022] Figure 4The implementation process of the method for recording the list of cells successfully switched by a RedCap terminal described in an embodiment of the present disclosure is shown.

[0023] Figure 5 The implementation process of the method for recording the list of cells with switching conditions for the RedCap terminal described in the embodiment of the present disclosure is shown.

[0024] Figure 6 The internal structure of the lightweight terminal cell selection and reselection device described in some embodiments of the present disclosure is shown.

[0025] Figure 7 A more specific schematic diagram of the hardware structure of an electronic device described in some embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0027] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] It is understandable that before using the technical solutions of each embodiment of the present disclosure, the type, scope of use, usage scenarios, etc. of the personal information involved will be informed to the user in an appropriate manner, and the user's authorization will be obtained.

[0029] For example, in response to receiving an active request from a user, a prompt message is sent to the user to clearly remind the user that the operation requested to be performed will require obtaining and using the user's personal information. Thus, the user can independently choose whether to provide personal information to software or hardware such as an electronic device, application, server, or storage medium that performs the operation of the technical solution of the present disclosure according to the prompt message.

[0030] As an optional but non-limiting implementation, in response to receiving an active request from the user, the prompt information may be sent to the user in the form of a pop-up window, in which the prompt information may be presented in text form. In addition, the pop-up window may also carry a selection control for the user to choose "agree" or "disagree" to provide personal information to the electronic device.

[0031] It is understandable that the above notification and the process of obtaining user authorization are merely illustrative and do not constitute a limitation on the implementation of the present disclosure. Other methods that meet relevant laws and regulations may also be applied to the implementation of the present disclosure.

[0032] As mentioned above, since RedCap terminals can only access RedCap cells that support their bandwidth capabilities, the current situation is that RedCap cells are not fully covered. Therefore, how to enable RedCap terminals to access RedCap cells as quickly as possible and improve user experience has forced cell selection and cell reselection in the mobility management of RedCap terminals to become an important research and optimization direction.

[0033] It can be understood that mobility management of mobile communications generally includes cell selection, cell reselection, redirection, handover and conditional handover (CHO).

[0034] Among them, cell selection and cell reselection refer to the mobile terminal selecting the cell to reside in when in idle state (RRC_IDLE) or inactive state (RRC_INACTIVE) based on the network's reselection parameter configuration (usually configured in the cell's broadcast message for use by all mobile terminals in the cell) and neighboring cell measurement results.

[0035] Redirection means that when the mobile terminal changes from the connected state (RRC_CONNECTED) to the idle state or the inactive state, the network specifies the frequency of the neighboring cell in the RRC Release message, and the mobile terminal changes from the connected state to the idle state or the inactive state, and searches for the target cell to reside on the specified frequency. After redirection, the mobile terminal changes to the idle state or the inactive state.

[0036] Handover refers to the behavior of the mobile terminal in the connected state (RRC_CONNECTED). The target cell is explicitly specified by the network in the RRC reconfiguration message, and the mobile terminal is still in the connected state after switching to the target cell.

[0037] Conditional handover refers to the behavior of the mobile terminal in the connected state (RRC_CONNECTED). The difference between conditional handover and handover is that the network may configure one or more candidate target cells in the RRC reconfiguration message. The mobile terminal will evaluate the handover execution conditions of each candidate target cell according to the configured conditions. If there are multiple target cells that meet the handover execution conditions at the same time, it is up to the mobile terminal to decide which target cell to select and perform conditional handover. After switching to the target cell, the mobile terminal is still in the connected state.

[0038] It can be seen that cell selection and reselection are autonomously determined by the mobile terminal based on the measurement results in the idle state (RRC_IDLE) or inactive state (RRC_INACTIVE) and the reselection parameters configured by the network. Switching and conditional switching are instructed by the network to the mobile terminal, and are generally triggered by the measurement report reported by the mobile terminal in the connected state (RRC_CONNECTED). It can be seen that the mobility management of the mobile terminal in the idle state (RRC_IDLE) or inactive state (RRC_INACTIVE) is only evaluated based on the measurement results of the mobile terminal in the idle state (RRC_IDLE) or inactive state (RRC_INACTIVE) and the historical cells where the mobile terminal has resided, while the mobility management in the connected state (RRC_CONNECTED) is only triggered by the measurement results in the connected state (RRC_CONNECTED).

[0039] In actual applications, the RedCap terminal also performs the above-mentioned cell selection, cell reselection, switching and conditional switching in the same way as ordinary mobile terminals. It can be seen that when the RedCap terminal switches between the connected state (RRC_CONNECTED) and the idle state (RRC_IDLE), and the connected state (RRC_CONNECTED) and the inactive state (RRC_INACTIVE), the cell information obtained in the connected state (RRC_CONNECTED) is not recorded, which leads to problems in the cell selection or cell reselection process. For example: when the RedCap terminal attempts to switch to the target cell specified by the network in the connected state (RRC_CONNECTED), if the bandwidth of the target cell exceeds the capacity of the RedCap terminal, the switching will fail. Alternatively, the bandwidth of the target cell meets the capacity of the RedCap terminal and the switching is successful. In these cases, the RedCap terminal can determine whether the target cell meets its own bandwidth capacity. However, the existing mobility management process does not record the target cell information of these failed or successful switching. This means that when the RedCap terminal enters the idle state (RRC_IDLE) or inactive state (RRC_INACTIVE), it may try again to connect to the cell that failed to switch due to bandwidth problems before, or prioritize trying to connect to the cell that the RedCap terminal cannot access, resulting in unnecessary cell selection time and increased power consumption of the RedCap terminal, which ultimately results in a decreased user experience.

[0040] In order to solve the above problems, an embodiment of the present disclosure provides a lightweight terminal cell selection and reselection method that can record information on whether the cell obtained by the RedCap terminal in the connected state (RRC_CONNECTED) supports the Redcap terminal, and use the recorded information for cell selection and cell reselection when it is in the idle state (RRC_IDLE) or inactive state (RRC_INACTIVE), thereby assisting the Redcap terminal to quickly find an accessible cell, reduce the cell selection time and the power consumption of the RedCap terminal, and thus improve the user experience.

[0041] The lightweight terminal cell selection and reselection method described in the embodiments of the present disclosure can be applied to lightweight terminals, that is, it can be executed by a RedCap terminal. In addition, in order to execute the lightweight terminal cell selection and cell reselection method described in the embodiments of the present disclosure, in some embodiments of the present disclosure, the RedCap terminal can pre-maintain and save the following cell information list: a list of successful switching cells (HOList) and a list of cells with switching conditions (CHOCelllist). In some other embodiments of the present disclosure, the RedCap terminal can further pre-maintain and save a list of cells that meet the prohibited access (BarList).

[0042] The above-mentioned successful handover cell list (HOList) is used to record the target cell information of each successful handover of the RedCap terminal in the connected state (RRC_CONNECTED). The above-mentioned target cell information includes parameters such as cell ID, cell frequency, cell frequency band, bandwidth and signal quality. The RedCap terminal should ensure that when entering the idle state (RRC_IDLE) or inactive state (RRC_INACTIVE), the cells in the successful handover cell list are used as references for terminal cell selection and reselection.

[0043] The above-mentioned cell list with switching conditions (CHOCelllist) is used to record the cell information that can support the bandwidth capability of the RedCap terminal determined by the RedCap terminal during the conditional switching process in the connected state (RRC_CONNECTED), including: cell ID, cell frequency, cell frequency band, bandwidth, signal quality and other parameters. The RedCap terminal should ensure that when entering the idle state (RRC_IDLE) or inactive state (RRC_INACTIVE), the cells in the cell list with switching conditions are used as a reference for terminal cell selection and reselection.

[0044] The above-mentioned prohibited cell list (BarList) is used to record the cell information determined by the RedCap terminal in the connected state (RRC_CONNECTED) because its bandwidth does not support the bandwidth capability of the RedCap terminal. Among them, the above-mentioned cell information includes: cell identification (ID), cell frequency, cell frequency band, bandwidth, signal quality and other parameters. The RedCap terminal should ensure that it does not try to access the cell in the prohibited cell list when entering the idle state (RRC_IDLE) or inactive state (RRC_INACTIVE).

[0045] Based on the above, Figure 1 The implementation process of the lightweight terminal cell selection and reselection method described in some embodiments of the present disclosure is shown. Figure 1 As shown, when the RedCap terminal enters the idle state or the inactive state from the connected state, the RedCap terminal cell selection and reselection method described in the embodiment of the present disclosure includes the following steps: In step 110, a candidate cell list is generated based on a pre-stored handover successful cell list (HOList) and a handover condition cell list (CHOCelllist).

[0046] Specifically, in an embodiment of the present disclosure, a method for generating a candidate cell list may include: first, sorting all cells in a switching successful cell list (HOList) and a switching conditional cell list (CHOCelllist) in order of recorded signal quality from good to bad; then, adding all cells in the switching successful cell list (HOList) and the switching conditional cell list (CHOCelllist) to the above-mentioned candidate cell list in sequence in the sorted order.

[0047] Furthermore, in the process of sorting, for cells with the same signal quality, the cells with the same frequency as the cell where the RedCap terminal resides when leaving the connected state can be sorted in front based on the recorded cell frequency. It should be noted that if the signal quality and cell frequency are the same, the cells can be sorted in any order.

[0048] In step 120, a cell in the candidate cell list is tried based on the generated candidate cell list.

[0049] In the embodiment of the present disclosure, the candidate cell list can be followed in the order of signal quality from good to bad to try to stay in sequence. Specifically, in the embodiment of the present disclosure, the implementation method of trying to stay in a cell in the candidate cell list based on the generated candidate cell list can refer to Figure 2 , including the following steps: In step 210, a cell with the best signal quality is selected from the candidate cell list as a target cell.

[0050] In step 220, an attempt is made to camp on the target cell.

[0051] In step 230, in response to determining that camping on the target cell is successful, the process ends.

[0052] In step 240, in response to determining that the camping in the target cell fails, the target cell is deleted from the candidate cell list, and then the process returns to step 210 to continue trying the cell with the next best signal quality in the candidate cell list until the camping succeeds or all cells in the candidate cell list fail to camp.

[0053] In the above step 120, in response to determining to reside in a cell in the candidate cell list, the current process may be terminated.

[0054] In step 130, in response to determining that all cells in the candidate cell list have failed to camp on, frequency band scanning is initiated to select a cell to camp on.

[0055] In some embodiments of the present disclosure, the above-mentioned frequency band scanning and the process of selecting the cell to reside in can refer to the process specified in the existing 3GPP protocol, and the specific process will not be repeated.

[0056] As an alternative to the process specified in the existing protocol, in some other embodiments of the present disclosure, in the case where a prohibited access cell list is pre-stored, the selection of a cell by frequency band scanning described in step 140 may specifically include: reading the pre-stored prohibited access cell list, and prohibiting attempts to reside in cells in the prohibited access cell list during frequency band scanning. That is, step 140 may specifically be as follows: Figure 3 As shown, the following steps are included: In step 310, a pre-stored prohibited cell list is read.

[0057] In step 320, a target cell to attempt to camp on is determined by frequency band scanning.

[0058] In step 330, the cell ID of the target cell is compared with the cell IDs of each cell in the prohibited cell list.

[0059] In step 340, in response to determining that the target cell is a cell in the prohibited access cell list, the target cell is skipped and the process returns to step 320 to continue the frequency band scanning.

[0060] At step 350, in response to determining that the target cell is not a cell in the prohibited cell list, an attempt is made to camp on the target cell.

[0061] In step 360, in response to determining that the dwelling fails, the process returns to step 320 to continue scanning the frequency band.

[0062] In step 370, in response to determining that the residency is successful, the above process ends.

[0063] It can be seen from this that the RedCap terminal records and maintains the switching success cell list (HOList) and the switching condition cell list (CHOCelllist) in the connected state, so that the RedCap terminal can first try to access the cells in the switching success cell list (HOList) and the switching condition cell list (CHOCelllist) when entering the idle state or inactive state, because the cells in the switching success cell list (HOList) and the switching condition cell list (CHOCelllist) are all determined to meet the bandwidth capability requirements of the RedCap terminal. Therefore, compared with the method of directly scanning the frequency band by the RedCap terminal, the cell selection can usually be completed more quickly with a higher probability. In other words, the above-mentioned RedCap terminal cell selection and reselection method can effectively improve the probability of the RedCap terminal residing in the RedCap terminal residing in the current 5G network environment and the user experience. Furthermore, in the case that all cells in the candidate cell list fail to reside, even if frequency band scanning is required, the prohibited cell list (BarList) recorded and maintained by the RedCap terminal in the connected state can be further used to enable the RedCap terminal to avoid those cells that have been confirmed to not meet the bandwidth capability requirements of the RedCap terminal before trying to reside, thereby shortening the cell selection time and the power consumption of the RedCap terminal, thereby improving the user experience.

[0064] The following will describe in detail the recording method of the above-mentioned successful handover cell list (HOList), the handover condition cell list (CHOCelllist) and the prohibited access cell list (BarList).

[0065] The above-mentioned successful handover cell list (HOList) and prohibited access cell list (BarList) are usually recorded during the handover process of the RedCap terminal. Figure 4 The implementation process of the method for recording the RedCap terminal successful switching cell list (HOList) described in the embodiment of the present disclosure is shown. Figure 4 As shown, the above method may include the following steps. It should be noted that before executing step 410, the RedCap terminal is currently in a connected state, accessing cell A and establishing a service connection.

[0066] In step 410, an indication for handover to target cell B is received.

[0067] In step 420, it is determined whether the bandwidth of the target cell B supports the bandwidth capability of the RedCap terminal.

[0068] Specifically, the RedCap terminal will determine whether the bandwidth of the target cell B is greater than the bandwidth capability of the RedCap terminal. If the bandwidth of the target cell B is greater than the bandwidth capability of the RedCap terminal, the target cell B cannot support the bandwidth capability of the RedCap terminal; otherwise, the target cell B can support the bandwidth capability of the RedCap terminal.

[0069] In step 430, in response to determining that the bandwidth of the target cell B cannot support the bandwidth capability of the RedCap terminal, a handover failure process is performed.

[0070] In an embodiment of the present disclosure, the above step 430 may further include: in response to determining that the bandwidth of the target cell B cannot support the bandwidth capability of the RedCap terminal, adding the information of the target cell B to the above-mentioned prohibited access cell list (BarList), thereby further realizing the generation of the prohibited access cell list (BarList) and information recording.

[0071] At step 440, in response to determining that the bandwidth of the target cell B can support the bandwidth capability of the RedCap terminal, a handover to the target cell B is performed.

[0072] In step 450, in response to the handover being successful, the information of the target cell B is added to a handover successful cell list (HOList).

[0073] In step 460, in response to the handover failure, a handover failure process is performed.

[0074] It can be seen that through the above method, the maintenance and recording of the successful switching cell list (HOList) can be completed during the switching process of the RedCap terminal. At the same time, the maintenance and recording of the prohibited access cell list (BarList) can also be further completed.

[0075] The above-mentioned cell list with switching conditions (CHOCelllist) is usually recorded in the conditional switching process of the RedCap terminal. Specifically, Figure 5 The implementation process of the method for recording the cell list (CHOCelllist) with switching conditions of the RedCap terminal described in the embodiment of the present disclosure is shown. Figure 5 As shown, the above method may include the following steps. It should be noted that before executing step 510, the RedCap terminal is currently in a connected state, accessing cell A and establishing a service connection.

[0076] In step 510, an RRC reconfiguration message sent by the network side is received, wherein the message includes configurations of one or more conditional handover candidate cells and conditional handover execution conditions.

[0077] In step 520, it is evaluated whether the candidate cell satisfies the conditional handover execution condition.

[0078] In step 530, it is determined whether the bandwidth capabilities of all candidate cells that meet the conditional handover execution condition support the bandwidth capability of the RedCap terminal.

[0079] Specifically, the RedCap terminal will determine whether the bandwidth of all candidate cells that meet the conditional switching execution conditions is greater than the bandwidth capability of the RedCap terminal. If the bandwidth of the candidate cell is greater than the bandwidth capability of the RedCap terminal, the candidate cell cannot support the bandwidth capability of the RedCap terminal; otherwise, the candidate cell can support the bandwidth capability of the RedCap terminal.

[0080] In step 540, information of all candidate cells that can support the bandwidth capability of the RedCap terminal is added to a conditional switching cell list (CHOCelllist).

[0081] The above step 540 may further include: adding information of all candidate cells that cannot support the bandwidth capability of the RedCap terminal to a prohibited access cell list (BarList).

[0082] Subsequently, the RedCap terminal will perform a conditional handover process until the handover is completed. Specifically, the RedCap terminal selects a candidate cell that can support the bandwidth capability of the RedCap terminal and performs the handover of the cell. If the handover is successful, the conditional handover process ends. If the handover fails, the RedCap terminal continues to try the next candidate cell that can support the bandwidth capability of the RedCap terminal for handover, and repeats this process until the handover is successful.

[0083] It can be seen that through the above method, the maintenance and recording of the cell list (CHOCelllist) of conditional switching can be completed during the conditional switching of the RedCap terminal. At the same time, the maintenance and recording of the prohibited access cell list (BarList) can also be further completed.

[0084] Corresponding to the above-mentioned lightweight terminal cell selection and reselection method, some embodiments of the present disclosure further disclose a lightweight terminal cell selection and reselection device. Figure 6 The internal structure of the lightweight terminal cell selection and reselection device described in some embodiments of the present disclosure is shown. Figure 6 The above-mentioned lightweight terminal cell selection and reselection device may include: A candidate cell list generating module 610, configured to generate a candidate cell list based on a pre-stored switching successful cell list and a switching conditional cell list when the lightweight terminal enters an idle state or an inactive state from a connected state; A cell selection module 620 is configured to attempt to reside in a cell in a candidate cell list based on the candidate cell list; and The frequency scanning module 630 is configured to initiate frequency band scanning to select a cell to reside in in response to determining that all cells in the candidate cell list have failed to reside.

[0085] It can be seen that by using the above-mentioned lightweight terminal cell selection and reselection device, by recording and maintaining the list of successful switching cells and the list of cells with switching conditions in the connected state, the RedCap terminal can first try to access the cells in the list of successful switching cells and the list of cells with switching conditions when entering the idle state or inactive state, because the cells in the list of successful switching cells and the list of cells with switching conditions are all determined to be cells that can meet the bandwidth capability requirements of the RedCap terminal. Therefore, compared with the method of directly scanning the frequency band by the RedCap terminal, the cell selection can usually be completed more quickly with a higher probability. In other words, the above-mentioned RedCap terminal cell selection and reselection method can effectively improve the probability of the RedCap terminal residing in the RedCap terminal residing in the current 5G network environment and the user experience.

[0086] Based on the same inventive concept, corresponding to any of the above-mentioned embodiments and methods, the present disclosure also provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the lightweight terminal cell selection and reselection method described in any of the above embodiments is implemented.

[0087] Figure 7 A more specific hardware structure diagram of an electronic device provided in this embodiment is shown, and the device may include: a processor 2010, a memory 2020, an input / output interface 2030, a communication interface 2040, and a bus 2050. The processor 2010, the memory 2020, the input / output interface 2030, and the communication interface 2040 are connected to each other in communication within the device through the bus 2050.

[0088] The processor 2010 can be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0089] The memory 2020 may be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 2020 may store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program codes are stored in the memory 2020 and are called and executed by the processor 2010.

[0090] The input / output interface 2030 is used to connect input / output devices to realize information input and output. The input / output devices can be configured in the device as components, or can be externally connected to the device to provide corresponding functions. The input devices can include microphones, various sensors, etc., and the output devices can include displays, speakers, vibrators, indicator lights, etc.

[0091] The communication interface 2040 is used to connect a communication module (not shown) to realize communication interaction between the device and other devices. The communication module can realize communication through wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0092] The bus 2050 includes a path that transmits information between the various components of the device (eg, the processor 2010 , the memory 2020 , the input / output interface 2030 , and the communication interface 2040 ).

[0093] It should be noted that, although the above device only shows the processor 2010, the memory 2020, the input / output interface 2030, the communication interface 2040, and the bus 2050, in the specific implementation process, the device may also include other components necessary for normal operation. In addition, it can be understood by those skilled in the art that the above device may also only include the components necessary for implementing the embodiments of the present specification, and does not necessarily include all the components shown in the figure.

[0094] The electronic device of the above embodiment is used to implement the corresponding lightweight terminal cell selection and reselection method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0095] Based on the same inventive concept, corresponding to any of the above-mentioned embodiment methods, the present disclosure also provides a non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the lightweight terminal cell selection and reselection method as described in any of the above embodiments.

[0096] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0097] The computer instructions stored in the storage medium of the above embodiment are used to enable the computer to execute the lightweight terminal cell selection and reselection method as described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0098] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples; based on the concept of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of the embodiments of the present disclosure as described above, which are not provided in detail for the sake of simplicity.

[0099] In addition, to simplify the description and discussion, and in order not to obscure the embodiments of the present disclosure, known power / ground connections to integrated circuit (IC) chips and other components may or may not be shown in the provided figures. In addition, devices may be shown in the form of block diagrams to avoid obscuring the embodiments of the present disclosure, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform on which the embodiments of the present disclosure are to be implemented (i.e., these details should be fully within the scope of understanding of those skilled in the art). Where specific details (e.g., circuits) are set forth to describe exemplary embodiments of the present disclosure, it is apparent to those skilled in the art that the embodiments of the present disclosure may be implemented without these specific details or with variations in these specific details. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0100] Although the present disclosure has been described in conjunction with specific embodiments of the present disclosure, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the discussed embodiments.

[0101] The embodiments of the present disclosure are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A lightweight terminal cell selection and reselection method, performed by the lightweight terminal, comprising: When the lightweight terminal enters an idle state or an inactive state from a connected state, generating a candidate cell list based on a pre-stored list of successful switching cells and a list of cells with switching conditions; Attempting to camp on a cell in the candidate cell list based on the candidate cell list; as well as In response to determining that camping on all cells in the candidate cell list fails, frequency band scanning is initiated to select a cell to camp on.

2. The method according to claim 1, wherein: The list of cells with successful switching and the list of cells with switching conditions each include at least one piece of cell information; wherein the cell information includes: a cell identifier, a cell frequency, a cell frequency band, a bandwidth, and a signal quality parameter; Generating a candidate cell list comprises: Sort the cells in the successful switching cell list and the cells in the switching condition cell list in descending order of signal quality in the cell information; and The cells in the successful switching cell list and the cells in the switching condition cell list are added to the candidate cell list in sequence according to the sorted order.

3. The method according to claim 2, further comprising: In the process of sorting, for cells with the same signal quality, based on the cell frequency in the cell information, the cell with the same frequency as the cell where the lightweight terminal resides when leaving the connected state is sorted in front.

4. The method according to claim 1, wherein: Attempting to camp on a cell in the candidate cell list based on the candidate cell list comprises: Selecting a cell with the best signal quality from the candidate cell list as a target cell; Trying to camp on the target cell; In response to determining that camping on the target cell is successful, ending; and In response to determining that camping on the target cell fails, the target cell is deleted from the candidate cell list, and the process returns to the step of selecting a cell with the best signal quality from the candidate cell list as the target cell.

5. The method according to claim 1, wherein: The initiating frequency band scanning and selecting a cell to reside in comprises: Reading a pre-stored list of prohibited access cells; Select the target cell to be camped on by scanning the frequency band; Comparing the cell identifier of the target cell with the cell identifiers of each cell recorded in the prohibited access cell list; In response to determining that the target cell is a cell in the prohibited access cell list, skipping the target cell, and returning to the step of determining the target cell to attempt to camp on by frequency band scanning; In response to determining that the target cell is not a cell in the prohibited cell list, attempting to camp on the target cell; In response to determining that camping on the target cell fails, returning to the step of selecting a target cell to attempt camping on through frequency band scanning; and In response to determining that camping on the target cell is successful, the process ends.

6. The method according to claim 1, further comprising: Receiving an instruction to switch to a target cell; Determining whether the bandwidth of the target cell supports the bandwidth capability of the lightweight terminal; In response to determining that the bandwidth of the target cell cannot support the bandwidth capability of the lightweight terminal, executing a handover failure process; In response to determining that the bandwidth of the target cell can support the bandwidth capability of the lightweight terminal, performing a handover to the target cell; In response to a successful handover, adding information of the target cell to the handover successful cell list; as well as In response to a handover failure, the handover failure process is executed.

7. The method according to claim 6, further comprising: In response to determining that the bandwidth of the target cell cannot support the bandwidth capability of the lightweight terminal, information of the target cell is added to a prohibited access cell list.

8. The method according to claim 1, further comprising: Receiving a radio resource control (RRC) reconfiguration message sent by a network side; wherein the RRC reconfiguration message includes a configuration of at least one conditional switching candidate cell; Evaluating whether the candidate cell meets a conditional handover execution condition; Determining whether the bandwidth of all candidate cells that meet the conditional handover execution condition supports the bandwidth capability of the lightweight terminal; and Information of all candidate cells that support the bandwidth capability of the lightweight terminal is added to the conditional switching cell list.

9. The method according to claim 8, further comprising: Information of all candidate cells that cannot support the bandwidth capability of the lightweight terminal is added to a prohibited access cell list.

10. A lightweight terminal cell selection and reselection device, comprising: A candidate cell list generation module, configured to generate a candidate cell list based on a pre-stored list of successful switching cells and a list of cells with switching conditions when the lightweight terminal enters an idle state or an inactive state from a connected state; a cell selection module, configured to attempt to reside in a cell in the candidate cell list based on the candidate cell list; as well as The frequency scanning module is used for starting frequency band scanning to select a cell to reside in in response to determining that all cells in the candidate cell list have failed to reside.

11. An electronic device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the lightweight terminal cell selection and reselection method according to any one of claims 1 to 9 is implemented.

12. A non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable a computer to execute the lightweight terminal cell selection and reselection method according to any one of claims 1 to 9.

13. A computer program product, comprising computer program instructions, which, when executed on a computer, enable the computer to execute the lightweight terminal cell selection and reselection method according to any one of claims 1 to 9.

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