Network display control method, terminal, usim, and medium

Abstract

This invention provides a network display control method, terminal, USIM, and medium, relating to the field of communication technology. It addresses the problem of the lack of management and control mechanisms for network selection in existing technologies during manual network selection mode. The method includes: in response to entering the Public Land Mobile Network (PLMN) manual network selection mode, obtaining a PLMN display policy change command from the Universal Subscriber Identity Module (USIM); obtaining a PLMN display control file from the USIM according to the PLMN display policy change command; constructing the latest PLMN display policy in the manual network selection mode according to the PLMN display control file; and in response to a searched PLMN in the manual network selection mode, displaying the PLMN in the searched PLMN according to the latest PLMN display policy. This invention provides a management and control mechanism for displaying PLMNs in the manual network selection mode using a USIM-controlled terminal, enabling the terminal to achieve flexible PLMN display based on the real-time configuration of the PLMN display control file by the USIM in the manual network selection mode.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to a network display control method, a terminal, a USIM, and a computer-readable storage medium. Background Technology

[0002] When a terminal accesses a mobile network, it needs to determine the network selection mode. The network selection mode refers to how the terminal selects the network from the operator's network, typically divided into automatic and manual selection. Automatic selection means the customer doesn't need to make any settings on their terminal; the terminal automatically searches for available local networks and selects the most suitable one to provide service. Manual selection, on the other hand, requires the customer to manually select the network from the currently searchable operator networks, which can be achieved by configuring the terminal's user interface.

[0003] In some cases, there is no management or control over network selection in manual network selection mode. USIM cannot change the network display on the terminal in manual network selection mode based on real-time network status or other information. Generally, since users can arbitrarily choose from the networks searched by the terminal, they may lack sufficient understanding of the background information of the available networks and the selection process, leading to a certain degree of blind selection. This could result in network selection that negatively impacts user experience and increases economic costs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the above-mentioned shortcomings of the prior art by providing a network display control method, terminal, USIM and computer-readable storage medium, so as to solve the problem that the prior art lacks management and control means for network selection in manual network selection mode.

[0005] In a first aspect, the present invention provides a network display control method applied to a terminal, the method comprising:

[0006] In response to entering the manual network selection mode of the Public Land Mobile Network (PLMN), obtain the PLMN display policy change command from the General Subscriber Identity Module (USIM);

[0007] According to the PLMN display strategy change command, obtain the PLMN display control file from USIM, and build the latest PLMN display strategy in PLMN manual network selection mode according to the PLMN display control file;

[0008] In response to the searched PLMNs found in the manual PLMN selection mode, display the PLMNs in the searched PLMNs according to the latest PLMN display strategy.

[0009] Optionally, in response to entering PLMN manual network selection mode, a PLMN display policy change command is obtained from the USIM, specifically including:

[0010] In response to a user changing the PLMN automatic network selection mode to the PLMN manual network selection mode, a network search mode change information is sent to the USIM.

[0011] Receive a PLMN display policy change command from USIM. The PLMN display policy change command is read by USIM from the first PLMN list based on the network search mode change information. The first PLMN list includes the display indication of the PLMN in the PLMN manual network selection mode.

[0012] Optionally, the PLMN display control file is obtained from the USIM according to the PLMN display strategy change command, and the latest PLMN display strategy in the PLMN manual grid selection mode is constructed according to the PLMN display control file, specifically including:

[0013] In response to receiving a PLMN display policy change command, the overall PLMN display policy of the USIM is read. The overall PLMN display policy indicates whether to restrict the display of the PLMN in the PLMN manual network selection mode.

[0014] In response to the PLMN overall display policy instruction to restrict the display of PLMNs in PLMN manual network selection mode, the first PLMN list of the USIM is read according to the instruction of the PLMN display policy change command;

[0015] A second PLMN list is constructed based on the first PLMN list. The second PLMN list only includes PLMNs that are indicated to be displayable in the manual PLMN selection mode from the first PLMN list. The second PLMN list serves as the latest PLMN display strategy in the manual PLMN selection mode.

[0016] Optionally, the first PLMN list of the USIM is read according to the instructions of the PLMN display policy change command, specifically including:

[0017] In response to a PLMN display policy change command, the system reads the first user-controlled PLMN list and / or the first operator-controlled PLMN list, and reads the first user-controlled PLMN list and / or the first operator-controlled PLMN list from the USIM. The first user-controlled PLMN list is configured or updated by the USIM according to user requirements, and the first operator-controlled PLMN list is configured or updated by the USIM according to operator requirements.

[0018] Optionally, the first PLMN list includes the PLMN identifier, access technology identifier, and display indication identifier of the PLMN that can be displayed in the manual network selection mode. The PLMN identifier, access technology identifier, and display indication identifier are each recorded in the first PLMN list using a TLV structure that includes a tag, length, and value.

[0019] Optionally, a second PLMN list is constructed based on the first PLMN list. The second PLMN list only includes PLMNs that are displayed in the manual PLMN selection mode as indicated in the first PLMN list. Specifically, it includes:

[0020] Obtain the PLMN identifier, access technology identifier, and display indicator identifier for each PLMN in the first PLMN list;

[0021] In response to the discovery that a certain PLMN has a display indicator, the PLMN identifier and access technology identifier of that PLMN are added to the second PLMN list;

[0022] In response to a PLMN not having a display indicator, the PLMN identifier and access technology identifier of that PLMN will not be added to the second PLMN list. The first PLMN list also includes the PLMN identifier and access technology identifier of PLMNs that cannot be displayed in the manual network selection mode.

[0023] Optionally, the PLMN display control file is obtained from the USIM according to the PLMN display strategy change command, and the latest PLMN display strategy in the PLMN manual grid selection mode is constructed according to the PLMN display control file, specifically including:

[0024] In response to receiving a PLMN display policy change command, the overall PLMN display policy of the USIM is read. The overall PLMN display policy indicates whether to restrict the display of the PLMN in the PLMN manual network selection mode.

[0025] In response to the overall PLMN display policy instruction that the PLMN should not be restricted from displaying in the manual PLMN selection mode, the latest PLMN display policy in the manual PLMN selection mode is determined to be to not restrict the display of the PLMN.

[0026] Optionally, display the PLMNs in the searched PLMNs according to the latest PLMN display strategy, specifically including:

[0027] In response to the latest PLMN display strategy including a second PLMN list, display PLMNs that belong to both the searched PLMN and the second PLMN list; or,

[0028] In response to the latest PLMN display strategy, the display of PLMNs is not restricted in the manual PLMN selection mode, and all searched PLMNs are displayed.

[0029] Secondly, the present invention provides a network display control method applied to a Universal User Identification Module (USIM), the method comprising:

[0030] The terminal is provided with a Public Land Mobile Network (PLMN) policy change command. The PLMN policy change command is obtained from the USIM by the terminal in response to entering the PLMN manual network selection mode.

[0031] The terminal is provided with a PLMN display control file. The PLMN display control file is obtained by the terminal from the USIM according to the PLMN display policy change command. This enables the terminal to build the latest PLMN display policy in the PLMN manual network selection mode according to the PLMN display control file, and to display the PLMN in the search PLMN according to the latest PLMN display policy in response to the search PLMN found in the PLMN manual network selection mode.

[0032] Optionally, before providing the PLMN display policy change command to the terminal, the method further includes:

[0033] Configure or update the overall PLMN display policy, which indicates whether to restrict the display of the PLMN in manual network selection mode.

[0034] Configure or update the first user-controlled PLMN list according to user needs, and configure or update the first operator-controlled PLMN list according to operator needs.

[0035] The first user-controlled PLMN list and the first operator-controlled PLMN list together constitute the first PLMN list, which includes the display indication of the PLMN in the PLMN manual network selection mode.

[0036] The PLMN display control file consists of the first PLMN list and the overall PLMN display strategy.

[0037] Optionally, the first PLMN list includes the PLMN identifier, access technology identifier, and display indication identifier of the PLMN that can be displayed in the manual network selection mode. The PLMN identifier, access technology identifier, and display indication identifier are each recorded in the first PLMN list using a TLV structure that includes a tag, length, and value.

[0038] Optionally, a PLMN display policy change command is provided to the terminal. This command is obtained from the USIM by the terminal in response to entering the PLMN manual network selection mode, and specifically includes:

[0039] Receive network search mode change information from the terminal. The network search mode change information is sent by the terminal to the USIM in response to the user changing the PLMN automatic network selection mode to the PLMN manual network selection mode.

[0040] Based on the network search mode change information, a PLMN display policy change command is generated to instruct the terminal to read the first PLMN list of the USIM and then sent to the terminal.

[0041] Optionally, a PLMN display control file is provided to the terminal. The PLMN display control file is obtained by the terminal from the USIM according to the PLMN display policy change command, and specifically includes:

[0042] Provide the terminal with the overall PLMN display policy, which is read from the USIM by the terminal in response to receiving a PLMN display policy change command; and / or,

[0043] The terminal is provided with a first PLMN list, which is read from the USIM by the terminal in response to the overall PLMN display policy instruction that the PLMN is restricted from display in manual network selection mode, according to the PLMN display policy change command.

[0044] Thirdly, the present invention provides a terminal, the terminal comprising:

[0045] The first acquisition module is used to acquire the PLMN display policy change command from the General Subscriber Identity Module (USIM) in response to entering the manual network selection mode of the Public Land Mobile Network (PLMN).

[0046] The second acquisition module, connected to the first acquisition module, is used to acquire the PLMN display control file from the USIM according to the PLMN display strategy change command, and to construct the latest PLMN display strategy in the PLMN manual network selection mode according to the PLMN display control file.

[0047] The display module, connected to the second acquisition module, is used to respond to the searched PLMN in the PLMN manual selection mode and display the PLMN in the searched PLMN according to the latest PLMN display strategy.

[0048] Fourthly, the present invention provides a Universal User Identification Module (USIM), the USIM comprising:

[0049] The first providing module is used to provide the terminal with a Public Land Mobile Network (PLMN) display policy change command. The PLMN display policy change command is obtained by the terminal from the USIM in response to entering the PLMN manual network selection mode.

[0050] The second providing module, connected to the first providing module, is used to provide the terminal with a PLMN display control file. The PLMN display control file is obtained by the terminal from the USIM according to the PLMN display policy change command, so that the terminal can build the latest PLMN display policy in the PLMN manual network selection mode according to the PLMN display control file, and display the PLMN in the search PLMN according to the latest PLMN display policy in response to the search PLMN found in the PLMN manual network selection mode.

[0051] Fifthly, the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the network display control method described above.

[0052] This invention provides a network display control method, a terminal, a USIM (United States Information Modeling) system, and a computer-readable storage medium. In manual network selection mode, the terminal requests the USIM system to modify the PLMN (Plane Network Management Protocol) display policy. The USIM system provides the terminal with commands and control files for modifying the PLMN display policy. Based on this, the terminal obtains the latest PLMN display policy and displays only PLMNs that meet the policy. This provides a management and control mechanism for the terminal's manual network selection mode. The USIM system can control the terminal to change the network display in manual network selection mode based on real-time network status and other information. This allows the terminal to flexibly display PLMNs according to the real-time configuration of the PLMN display control file by the USIM system, helping users avoid selecting unsuitable networks. This further protects user interests in terms of service quality and economic costs, and also strengthens operator business management and enhances commercial interests in protocol network selection. Attached Figure Description

[0053] Figure 1 This is a flowchart of a network display control method according to an embodiment of the present invention;

[0054] Figure 2 This is a schematic diagram of the structure of a data file management system according to an embodiment of the present invention;

[0055] Figure 3 This is a flowchart of another network display control method according to an embodiment of the present invention;

[0056] Figure 4 This is a flowchart of another network display control method according to an embodiment of the present invention;

[0057] Figure 5 This is a schematic diagram of the structure of a terminal according to an embodiment of the present invention;

[0058] Figure 6 This is a schematic diagram of the structure of a USIM according to an embodiment of the present invention. Detailed Implementation

[0059] To enable those skilled in the art to better understand the technical solution of the present invention, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0060] It is understood that the specific embodiments and accompanying drawings described herein are merely for explaining the invention and are not intended to limit the invention.

[0061] It is understood that, without conflict, the various embodiments and features in the embodiments of the present invention can be combined with each other.

[0062] It is understood that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, while the parts unrelated to the present invention are not shown in the drawings.

[0063] It is understood that each unit or module involved in the embodiments of the present invention may correspond to only one entity structure, or may be composed of multiple entity structures, or multiple units or modules may be integrated into one entity structure.

[0064] It is understood that, without conflict, the functions and steps marked in the flowcharts and block diagrams of this invention may occur in a different order than that marked in the accompanying drawings.

[0065] It is understood that the flowcharts and block diagrams of this invention illustrate the possible architecture, functions, and operations of systems, apparatuses, devices, and methods according to various embodiments of the invention. Each block in the flowchart or block diagram may represent a unit, module, program segment, or code, containing executable instructions for implementing the specified function. Furthermore, each block or combination of blocks in the block diagram and flowchart can be implemented using a hardware-based system to achieve the specified function, or using a combination of hardware and computer instructions.

[0066] It is understood that the units and modules involved in the embodiments of the present invention can be implemented by software or by hardware. For example, the units and modules can be located in a processor.

[0067] To facilitate understanding of this invention, USIM and selection limitations will be introduced first.

[0068] The USIM (Universal Subscriber Identity Module) card is a continuation and advancement of the SIM (Subscriber Identity Module) card used in the UMTS (Universal Mobile Telecommunications System) network. It is used to store user identity information and personal data, ensuring the security of access to mobile network services. It can use necessary functions and data to perform user identification and authorization when users access mobile network services, thus enabling the mobile network to represent and identify user applications.

[0069] The USAT (USIM Application Toolkit) protocol is a service mechanism supported by USIM. It is implemented on the basis of services provided by the transport layer, changing the original passive position of USIM relative to the terminal, which could only passively execute terminal commands and could not actively make command requests to the terminal. USAT allows USIM applications to interact and operate with terminals that support this mechanism, enabling USIM to actively request the terminal to perform a certain operation. USAT is the foundation and main way for telecommunications smart cards to realize services through terminals.

[0070] Network selection mode is an essential capability for any terminal, especially in specific scenarios such as terminal roaming and network sharing. When terminals have specific needs and strategies regarding the operator's network selection mechanism due to commercial or cost reasons, this function plays a more significant role. Currently, network selection mode settings are implemented through the terminal's settings function. These settings primarily involve user behavior; users can choose to have the terminal automatically select a network, or they can choose a network after searching but not select one, and then manually select the network according to their request. This supports users' needs in network selection.

[0071] In automatic network selection mode, the USIM and the terminal have certain management and restrictions on the network selection status. The USIM can provide two priority lists of PLMNs (Public Land Mobile Networks) that are controlled by the user and the operator, respectively. During the network selection process, the terminal will select the network according to the requirements of these two lists. In this way, it can be ensured that the terminal's network selection is prioritized and restricted to the network that the user or the operator intends to select.

[0072] Although USIM can restrict network selection by the terminal in automatic network selection mode, there are no management restrictions on network selection in manual network selection mode. Therefore, the network selection process in manual network selection mode needs to be optimized by adopting certain management restrictions to strengthen the guidance of user behavior, but existing technologies do not support this requirement. This invention proposes that in manual network selection mode, by setting a strategy for displaying network search results, only PLMNs in the PLMN list in the USIM can be displayed, thus objectively restricting the network selected by the user to the PLMNs that exist in the PLMN list. Detailed implementation methods are shown in the following embodiments.

[0073] Example 1:

[0074] like Figure 1 As shown, Embodiment 1 of the present invention provides a network display control method applied to a terminal, the method comprising:

[0075] S11. In response to entering the manual network selection mode of the Public Land Mobile Network (PLMN), obtain the PLMN display policy change command from the General Subscriber Identity Module (USIM).

[0076] S12. Obtain the PLMN display control file from the USIM according to the PLMN display strategy change command, and build the latest PLMN display strategy in the PLMN manual network selection mode according to the PLMN display control file.

[0077] S13. In response to the search PLMN found in the PLMN manual selection mode, display the PLMN in the search PLMN according to the latest PLMN display strategy.

[0078] Specifically, in this embodiment, the terminal requests the USIM to change the PLMN display policy in manual network selection mode. The USIM provides the terminal with commands and control files for changing the PLMN display policy. Based on this, the terminal obtains the latest PLMN display policy and only displays PLMNs that meet the policy. This provides management and control for the terminal's manual network selection mode, enabling the USIM to control the terminal to change the network display in manual network selection mode based on real-time network status and other information. This allows the terminal to achieve flexible PLMN display in manual network selection mode according to the real-time configuration of the PLMN display control file by the USIM. This helps users avoid selecting unsuitable networks, further protecting user interests in terms of service quality and economic costs. It also strengthens the operator's business management and enhances commercial interests in areas such as protocol network selection.

[0079] Optionally, in response to entering PLMN manual network selection mode, a PLMN display policy change command is obtained from the USIM, specifically including:

[0080] In response to a user changing the PLMN automatic network selection mode to the PLMN manual network selection mode, a network search mode change information is sent to the USIM.

[0081] Receive a PLMN display policy change command from USIM. The PLMN display policy change command is read by USIM from the first PLMN list based on the network search mode change information. The first PLMN list includes the display indication of the PLMN in the PLMN manual network selection mode.

[0082] Specifically, in this embodiment, the display strategy for manual network selection is defined by the USIM, i.e., a PLMN display control file is configured in the USIM. This file can change according to the real-time network status, user or operator requirements, etc. Therefore, when the terminal changes the network selection mode, it informs the USIM of the change. Based on the change in network selection mode and its own display strategy, the USIM determines whether to send a PLMN display strategy change command to the terminal. This command instructs the terminal to read which PLMN display control files, specifically which PLMN(s) list(s) to read. Therefore, the basic flow of the method can be represented as follows: the manual network selection PLMN display strategy in the USIM changes—the terminal user changes the network selection mode to manual network selection—the terminal notifies the USIM of the change to manual network selection—the USIM notifies the terminal of the policy change, which may include an indication of which PLMN(s) lists can be displayed—the terminal reads the PLMN display control file according to the command and establishes its own list of displayable PLMNs in the manual network selection mode—the specified PLMN is displayed according to its own PLMN(s) list.

[0083] Optionally, the PLMN display control file is obtained from the USIM according to the PLMN display strategy change command, and the latest PLMN display strategy in the PLMN manual grid selection mode is constructed according to the PLMN display control file, specifically including:

[0084] In response to receiving a PLMN display policy change command, the overall PLMN display policy of the USIM is read. The overall PLMN display policy indicates whether to restrict the display of the PLMN in the PLMN manual network selection mode.

[0085] In response to the PLMN overall display policy instruction to restrict the display of PLMNs in PLMN manual network selection mode, the first PLMN list of the USIM is read according to the instruction of the PLMN display policy change command;

[0086] A second PLMN list is constructed based on the first PLMN list. The second PLMN list includes PLMNs that are displayed in the manual PLMN selection mode as indicated in the first PLMN list. The second PLMN list serves as the latest PLMN display strategy in the manual PLMN selection mode.

[0087] Optionally, the first PLMN list includes the PLMN identifier, access technology identifier, and display indication identifier of the PLMN that can be displayed in the manual network selection mode. The PLMN identifier, access technology identifier, and display indication identifier are each recorded in the first PLMN list using a TLV structure that includes a tag, length, and value.

[0088] Optionally, a second PLMN list is constructed based on the first PLMN list. The second PLMN list only includes PLMNs that are displayed in the manual PLMN selection mode as indicated in the first PLMN list. Specifically, it includes:

[0089] Obtain the PLMN identifier, access technology identifier, and display indicator identifier for each PLMN in the first PLMN list;

[0090] In response to the discovery that a certain PLMN has a display indicator, the PLMN identifier and access technology identifier of that PLMN are added to the second PLMN list;

[0091] In response to a PLMN not having a display indicator, the PLMN identifier and access technology identifier of that PLMN will not be added to the second PLMN list. The first PLMN list also includes the PLMN identifier and access technology identifier of PLMNs that cannot be displayed in the manual network selection mode.

[0092] Specifically, in this embodiment, the aspects involved in the manual network selection display strategy include: whether to restrict PLMN display in manual network selection mode, which first PLMN lists define the range under restriction, optional list 1 being a user-controlled PLMN list, and optional list 2 being an operator-controlled PLMN list. Whether PLMN display is restricted and the two optional lists exist in different files of the USIM. In this case, which PLMN lists need to be read is transmitted to the terminal via a command initiated by the USIM. The terminal obtains the above content from the USIM according to the command, and forms its own second PLMN list that can be displayed in manual network selection mode based on the range of displayable PLMNs indicated by the specified first PLMN list. For the USIM, firstly, the overall PLMN display strategy is configured, including two methods: displaying all PLMNs and displaying restricted PLMNs. Displaying all PLMNs means that there are no restrictions on manual network selection mode; whichever PLMNs are found are displayed, and the user can select any PLMN from them. The first PLMN display strategy is set in the management data file, specifically, it can be set through EF. AD The original reserved bytes are extended to indicate whether PLMN display management operations are supported. EF ADIt is one of the basic files in USIM, and its main function is to store and manage data. It contains information related to the operating mode, additional information indicating USIM management requirements, and some basic data length indicators, etc. The extended reserved bytes can be EF. AD Additional information in the section, such as Figure 2 As shown, the reserved bit B3b5 (the fifth bit of the third byte) of the prior art is enabled. When B3b5=0, all searchable PLMNs must be displayed, including PLMNs that are not in the user PLMN list and operator PLMN list or do not have a display indicator. When B3b5=1, among all searched PLMNs, only those PLMNs that are in the specified user PLMN list and / or operator PLMN list and have a display indicator can be displayed; the rest cannot be displayed. Secondly, the data structure and content of the original PLMN list are changed. The existing PLMN list contains two data items: PLMN and access technology, but no PLMN display indicator. Furthermore, each PLMN and access technology uses a fixed-length structure (5 bytes in total). The original PLMN list is more suitable for a fixed-format data structure. This application requires changing the data content and structure. A PLMN display indicator needs to be added to the data content to indicate whether the corresponding PLMN is displayed in the manual PLMN network selection mode. Since the PLMN display indicator may only exist when there are PLMN display restrictions and may not exist when there are no display restrictions, it is not a fixed format. A more flexible TLV (Tag, Length, Value) structure is more suitable. That is, the original PLMN list is expanded into a first PLMN list with a TLV structure including PLMN, access technology, and PLMN display indicator identifiers. The specific definition of the structure of the first PLMN list is shown in Table 1 below:

[0093] Table 1. Example of the structure of the first PLMN list.

[0094] describe value M / O Length (bytes) PLMN list marker 'A1' M 1 length X M 1 PLMN tag '80' M 1 length 03 M 1 PLMN -- M 3 Access technology marking '81' M 1 length 02 M 1 Access technology - M 2 PLMN displays indicator markers '82' M 1 length 01 M 1 PLMN display indication 00 / 01 M 1

[0095] In Table 1, the PLMN display indicator is an extension parameter of the first PLMN list based on the original PLMN. The PLMN display indicator '82' is coded as '00', which means that the PLMN cannot be displayed when the PLMN is manually selected, and coded as '01', which means that the PLMN can be displayed when the PLMN is manually selected.

[0096] Optionally, the PLMN display control file is obtained from the USIM according to the PLMN display strategy change command, and the latest PLMN display strategy in the PLMN manual grid selection mode is constructed according to the PLMN display control file, specifically including:

[0097] In response to receiving a PLMN display policy change command, the overall PLMN display policy of the USIM is read. The overall PLMN display policy indicates whether to restrict the display of the PLMN in the PLMN manual network selection mode.

[0098] In response to the overall PLMN display policy instruction that the PLMN should not be restricted from displaying in the manual PLMN selection mode, the latest PLMN display policy in the manual PLMN selection mode is determined to be to not restrict the display of the PLMN.

[0099] Specifically, in this embodiment, the strategy for manually selecting the PLMN mode may vary. Operators or users can set the overall PLMN display strategy and the first PLMN list according to their own needs (such as changes in operator protocol networks, users' desire for enhanced network selection guidance, etc.). In particular, the PLMNs included in the first PLMN list and their display instructions are set. Usually, operators configure them in the USIM file according to user needs through local pre-configuration or post-update. This solution has a certain degree of universality and takes into account various USIM strategies, such as no PLMN display restrictions for manual network selection, or selecting the range of PLMNs that can be displayed from different PLMN lists. Correspondingly, the terminal can change different PLMN display strategies. Theoretically, the PLMN display strategy change command can be generated based on three files: the overall PLMN display strategy, the first user-controlled PLMN list, and the first operator-controlled PLMN list. Thus, the overall PLMN display strategy can be directly specified in the command, or only the display control files that the terminal needs to read can be indicated. Furthermore, the overall PLMN display strategy can be read by default every time by setting it to be read by default. When the terminal switches to manual network selection mode, the network selection mode change is downloaded to the USIM as an event. The USIM needs to determine whether to require the terminal to update the PLMN display policy in manual network selection mode based on whether the policy has changed. If the terminal needs to update the policy, it is required to execute the policy update through an active command. To implement this solution, a new command (PLMN display policy change command) needs to be extended, which can be named Update PLMN Display Policy. A feasible command structure is defined as shown in Table 2 below:

[0100] Table 2 shows an example of the structure of the PLMN display strategy change command.

[0101]

[0102]

[0103] In Table 2, the command qualifier b1 indicates whether a PLMN control file exists in this command; the PLMN control file type is a new data object added to this command, and the condition is mandatory (it must exist when the command qualifier b1 = 1). It indicates that when the terminal is required to display the restricted PLMN, the file of the range of PLMNs that can be displayed (i.e., the first PLMN list) is provided. For example, the PLMNs to be displayed are defined in the file list where the user / operator-controlled PLMN files are stored. The definition can be found in Table 1; when the PLMN control file type is not included in this command, the terminal will treat both user-controlled and operator-controlled PLMN files as files of the range of PLMNs that can be displayed. The files are stored on the USIM and are files that the terminal can read. The terminal can read the specified file according to the instruction.

[0104] Optionally, display the PLMNs in the searched PLMNs according to the latest PLMN display strategy, specifically including:

[0105] In response to the latest PLMN display strategy including a second PLMN list, display PLMNs that belong to both the searched PLMN and the second PLMN list; or,

[0106] In response to the latest PLMN display strategy, the display of PLMNs is not restricted in the manual PLMN selection mode, and all searched PLMNs are displayed.

[0107] Specifically, in this embodiment, after receiving the command, the terminal needs to retrieve data from EF according to the command requirements. AD Obtain the overall PLMN display strategy. When the user manually selects a PLMN, display the searched PLMNs according to the strategy requirements. Determine whether to display all PLMNs or restrict PLMNs. If restricting PLMNs is displayed, continue to obtain an updated second PLMN list based on the overall PLMN display strategy and the first PLMN list. The second PLMN list contains PLMNs that are indicated to be displayed in the manual PLMN selection mode.

[0108] A more specific example is as follows Figure 3 As shown, this is used to enable enhanced management of terminals in manual network selection mode via USIM, restricting the range of selectable PLMNs, and optimizing service performance and user experience. The specific process is as follows:

[0109] S001: Configure the overall PLMN display policy and the first PLMN list for manual network selection management. Specifically, the manual PLMN selection policy can be changed, such as generating new policies according to the needs of users or operators, and configuring their content in the USIM. This can be mainly done through the configuration management data file EF. AD The first PLMN list file, along with possible related user / operator control configuration methods and requirements, can be found in [link to relevant documentation]. Figure 2and Table 1;

[0110] S002: The terminal is set to manual network selection mode. Specifically, after the PLMN's manual selection strategy is configured, at some point later, the user will set the terminal to manual network selection mode according to their own network selection needs.

[0111] S003: The terminal sends network search mode change information to USIM. Specifically, the terminal is set by the user to trigger the generation of a network search mode change event download command and send it to USIM.

[0112] S004: USIM generates a PLMN display policy change command and sends it to the terminal. Specifically, after receiving the command from the terminal, USIM parses it and determines the result after the network search mode change. If it is an automatic network selection mode, no further processing is required. If it is a manual network selection mode, USIM generates a PLMN display policy update command, UpdatePLMN Display Policy, in manual network selection mode. The command structure is shown in Table 2. The command indicates that there is follow-up processing and can include a file storing the policy (the file corresponding to the first PLMN list), which serves as the PLMN control file type in the command, providing the range of displayable PLMNs. The generated command is then sent to the terminal.

[0113] S005: The terminal parses the PLMN display policy change command to clarify the policy update requirement;

[0114] S006: Terminal reads EF AD The settings determine the overall display strategy of the PLMN. Specifically, after receiving a command from the USIM, the terminal parses it and determines that the PLMN display strategy needs to be updated. Further processing is required to obtain the updated strategy, and the terminal reads the management data file EF. AD The updated overall PLMN display strategy is obtained from the additional information portion;

[0115] S007: Determine whether the overall display strategy of the PLMN is a display-restricted PLMN. Specifically, determine whether the updated overall PLMN display strategy is a display-restricted PLMN. If yes, continue to the next step S009; otherwise, execute the next step S008.

[0116] S008: When manually selecting a network, the terminal displays all PLMNs. Specifically, the terminal executes the overall PLMN display strategy and displays all searched PLMNs when manually selecting a PLMN.

[0117] S009: The terminal reads the first PLMN list according to the PLMN display policy change command. Specifically, the terminal obtains the file that provides the range of displayable PLMNs from the received Update PLMN Display Policy command. If there is a PLMN control file type data object in the command, the terminal reads the corresponding control file and uses it as the range of displayable PLMNs. If there is no PLMN control file, both the user-controlled PLMN list file and the operator-controlled PLMN list file are used as the range of displayable PLMNs.

[0118] S010: The terminal reads the display identifier in the first PLMN list. Specifically, the terminal reads the PLMN list data in the corresponding first PLMN list file according to the PLMN display strategy change command requirements, and obtains the display identifier of each PLMN in the list.

[0119] S011: Determine whether the display identifier is allowed to be displayed. Specifically, the terminal determines whether the display identifier of the PLMN read this time is allowed to be displayed. If yes, continue to the next step S013; otherwise, execute step S012.

[0120] S012: The corresponding PLMN is not added to the terminal's second PLMN list. Specifically, the terminal does not add the PLMN to the terminal's displayable PLMN list (i.e., the second PLMN list). The terminal executes steps S010 and S011 in a loop, sequentially determining the status of each PLMN in the first PLMN list until the last item in the first PLMN list.

[0121] S013: The corresponding PLMN is added to the terminal's second PLMN list. Specifically, the terminal adds the PLMN to the terminal's displayable PLMN list. The terminal executes steps S010 and S011 in a loop, sequentially determining the status of each PLMN in the first PLMN list until the last item in the first PLMN list.

[0122] S014: Form a second PLMN list for the terminal. Specifically, the terminal forms a complete list of displayable PLMNs (the second PLMN list).

[0123] S015: When manually selecting a network, the terminal only displays PLMNs in the second PLMN list. Specifically, the terminal executes a policy that displays PLMNs according to the list of displayable PLMNs when manually selecting PLMNs, that is, only the PLMNs that are found and exist in the list of displayable PLMNs are displayed, and the rest are not displayed.

[0124] This embodiment 1 addresses the problem that existing methods for managing network selection in PLMN manual selection mode lack effective means, leading to unmet user and operator needs or compromised interests. It proposes a scheme to optimize manual network selection by controlling the PLMN display. The scheme is primarily based on USIM capabilities and emphasizes enhanced management of the PLMN display. This approach addresses the blindness of manual PLMN selection while maintaining maximum transparency for users. Specifically, it proposes improvements to the file content, list data structure, and active commands required for implementation, including extended definitions of parameters, functions, and structures. Furthermore, it specifies the process steps and rules for terminal-USIM interaction during implementation, preventing users from selecting unsuitable networks. This not only further protects user interests in terms of service quality and economic costs but also strengthens operator business management and enhances commercial interests in protocol network selection.

[0125] Example 2:

[0126] like Figure 4 As shown, Embodiment 2 of the present invention provides a network display control method applied to a Universal User Identification Module (USIM), the method comprising:

[0127] S21. Provide the terminal with a Public Land Mobile Network (PLMN) display policy change command. The PLMN display policy change command is obtained by the terminal from the USIM in response to entering the PLMN manual network selection mode.

[0128] S22. Provide the terminal with a PLMN display control file. The PLMN display control file is obtained by the terminal from the USIM according to the PLMN display policy change command, so that the terminal can build the latest PLMN display policy in the PLMN manual network selection mode according to the PLMN display control file, and display the PLMN in the search PLMN according to the latest PLMN display policy in response to the search PLMN found in the PLMN manual network selection mode.

[0129] Optionally, before providing the PLMN display policy change command to the terminal, the method further includes:

[0130] Configure or update the overall PLMN display policy, which indicates whether to restrict the display of the PLMN in manual network selection mode.

[0131] Configure or update the first user-controlled PLMN list according to user needs, and configure or update the first operator-controlled PLMN list according to operator needs.

[0132] The first user-controlled PLMN list and the first operator-controlled PLMN list together constitute the first PLMN list, which includes the display indication of the PLMN in the PLMN manual network selection mode.

[0133] The PLMN display control file consists of the first PLMN list and the overall PLMN display strategy.

[0134] Optionally, the first PLMN list includes the PLMN identifier, access technology identifier, and display indication identifier of the PLMN that can be displayed in the manual network selection mode. The PLMN identifier, access technology identifier, and display indication identifier are each recorded in the first PLMN list using a TLV structure that includes a tag, length, and value.

[0135] Optionally, a PLMN display policy change command is provided to the terminal. This command is obtained from the USIM by the terminal in response to entering the PLMN manual network selection mode, and specifically includes:

[0136] Receive network search mode change information from the terminal. The network search mode change information is sent by the terminal to the USIM in response to the user changing the PLMN automatic network selection mode to the PLMN manual network selection mode.

[0137] Based on the network search mode change information, a PLMN display policy change command is generated to instruct the terminal to read the first PLMN list of the USIM and then sent to the terminal.

[0138] Optionally, a PLMN display control file is provided to the terminal. The PLMN display control file is obtained by the terminal from the USIM according to the PLMN display policy change command, and specifically includes:

[0139] Provide the terminal with the overall PLMN display policy, which is read from the USIM by the terminal in response to receiving a PLMN display policy change command; and / or,

[0140] The terminal is provided with a first PLMN list, which is read from the USIM by the terminal in response to the overall PLMN display policy instruction that the PLMN is restricted from display in manual network selection mode, according to the PLMN display policy change command.

[0141] Example 2 is an implementation process based on USIM, and the specific implementation example is as follows. Figure 2 , Figure 3 As shown, this has been described in detail in Example 1.

[0142] Example 3:

[0143] like Figure 5As shown, Embodiment 3 of the present invention provides a terminal, the terminal comprising:

[0144] The first acquisition module 11 is used to acquire the PLMN display policy change command from the general subscriber identification module USIM in response to entering the manual network selection mode of the public land mobile network (PLMN).

[0145] The second acquisition module 12 is connected to the first acquisition module 11 and is used to acquire the PLMN display control file from the USIM according to the PLMN display strategy change command, and to construct the latest PLMN display strategy in the PLMN manual network selection mode according to the PLMN display control file.

[0146] Display module 13, connected to the second acquisition module 12, is used to display the PLMN in the search PLMN according to the latest PLMN display strategy in response to the search PLMN found in the PLMN manual selection mode.

[0147] Optionally, the first acquisition module 11 specifically includes:

[0148] The first sending unit is used to send network search mode change information to the USIM in response to the user changing the PLMN automatic network selection mode to the PLMN manual network selection mode.

[0149] The first receiving unit is used to receive a PLMN display policy change command from the USIM. The PLMN display policy change command is read by the USIM from the first PLMN list based on the network search mode change information. The first PLMN list includes the display indication of the PLMN in the PLMN manual network selection mode.

[0150] Optionally, the second acquisition module 12 specifically includes:

[0151] The first reading unit is used to read the overall PLMN display policy of the USIM in response to receiving a PLMN display policy change command. The overall PLMN display policy indicates whether the display of the PLMN is restricted in the manual network selection mode of the PLMN.

[0152] The second reading unit, connected to the first reading unit, is used to read the first PLMN list of the USIM in response to the PLMN overall display strategy instruction to restrict the display of PLMNs in the PLMN manual selection mode, according to the instruction of the PLMN display strategy change command.

[0153] The assembly unit, connected to the second reading unit, is used to assemble a second PLMN list based on the first PLMN list. The second PLMN list includes PLMNs that are displayed in the manual PLMN selection mode as indicated in the first PLMN list. The second PLMN list serves as the latest PLMN display strategy in the manual PLMN selection mode.

[0154] Optionally, the second reading unit is specifically used for:

[0155] In response to a PLMN display policy change command, the system reads the first user-controlled PLMN list and / or the first operator-controlled PLMN list, and reads the first user-controlled PLMN list and / or the first operator-controlled PLMN list from the USIM. The first user-controlled PLMN list is configured or updated by the USIM according to user requirements, and the first operator-controlled PLMN list is configured or updated by the USIM according to operator requirements.

[0156] Optionally, the first PLMN list includes the PLMN identifier, access technology identifier, and display indication identifier of the PLMN that can be displayed in the manual network selection mode. The PLMN identifier, access technology identifier, and display indication identifier are each recorded in the first PLMN list using a TLV structure that includes a tag, length, and value.

[0157] Optionally, the assembly unit specifically includes:

[0158] The identification reading subunit is used to obtain the PLMN identifier, access technology identifier, and display indication identifier of each PLMN in the first PLMN list being read;

[0159] The addition subunit, connected to the identifier reading subunit, is used to add the PLMN identifier and access technology identifier of a certain PLMN to the second PLMN list in response to the acquisition that a certain PLMN has a display indication identifier;

[0160] The discard sub-unit is connected to the identifier reading sub-unit and is used to respond to the fact that a certain PLMN does not have a display indicator identifier, and not to add the PLMN identifier and access technology identifier of a certain PLMN to the second PLMN list. The first PLMN list also includes the PLMN identifier and access technology identifier of PLMNs that cannot be displayed in the manual network selection mode of PLMN.

[0161] Optionally, the second acquisition module 12 specifically includes:

[0162] The first reading unit is used to read the overall PLMN display policy of the USIM in response to receiving a PLMN display policy change command. The overall PLMN display policy indicates whether the display of the PLMN is restricted in the manual network selection mode of the PLMN.

[0163] The assembly unit, connected to the first reading unit, is used to determine the latest PLMN display strategy in the manual netting mode as unrestricted display of the PLMN in response to the overall PLMN display strategy instruction that the PLMN should not be restricted in the manual netting mode.

[0164] Optionally, the display module 13 specifically includes:

[0165] The first display unit is configured to, in response to the latest PLMN display strategy including a second PLMN list, display PLMNs that simultaneously belong to both the searched PLMN and the second PLMN list; or...

[0166] The second display unit is used to respond to the latest PLMN display strategy, which allows for the display of all searched PLMNs without restriction in the manual PLMN selection mode.

[0167] Example 4:

[0168] like Figure 6 As shown, Embodiment 4 of the present invention provides a Universal User Identification Module (USIM), the USIM comprising:

[0169] The first providing module 21 is used to provide the terminal with a Public Land Mobile Network (PLMN) display policy change command. The PLMN display policy change command is obtained by the terminal from the USIM in response to entering the PLMN manual network selection mode.

[0170] The second providing module 22, connected to the first providing module 21, is used to provide the terminal with a PLMN display control file. The PLMN display control file is obtained by the terminal from the USIM according to the PLMN display policy change command, so that the terminal can build the latest PLMN display policy in the PLMN manual network selection mode according to the PLMN display control file, and display the PLMN in the search PLMN according to the latest PLMN display policy in response to the search PLMN found in the PLMN manual network selection mode.

[0171] Optionally, the USIM further includes a configuration module for:

[0172] Configure or update the overall PLMN display policy, which indicates whether to restrict the display of the PLMN in manual network selection mode.

[0173] Configure or update the first user-controlled PLMN list according to user needs, and configure or update the first operator-controlled PLMN list according to operator needs.

[0174] The first user-controlled PLMN list and the first operator-controlled PLMN list together constitute the first PLMN list, which includes the display indication of the PLMN in the PLMN manual network selection mode.

[0175] The PLMN display control file consists of the first PLMN list and the overall PLMN display strategy.

[0176] Optionally, the first PLMN list includes the PLMN identifier, access technology identifier, and display indication identifier of the PLMN that can be displayed in the manual network selection mode. The PLMN identifier, access technology identifier, and display indication identifier are each recorded in the first PLMN list using a TLV structure that includes a tag, length, and value.

[0177] Optionally, the first provided module 21 specifically includes:

[0178] The second receiving module is used to receive network search mode change information from the terminal. The network search mode change information is sent by the terminal to the USIM in response to the user changing the PLMN automatic network selection mode to the PLMN manual network selection mode.

[0179] The second sending module is used to generate a PLMN display policy change command that instructs the terminal to read the first PLMN list of the USIM based on the network search mode change information, and send the PLMN display policy change command to the terminal.

[0180] Optionally, the second providing module 22 specifically includes:

[0181] The first file unit is used to provide the terminal with the overall PLMN display strategy, which is read from the USIM by the terminal in response to receiving a PLMN display strategy change command; and / or,

[0182] The second file unit is used to provide the terminal with a first PLMN list. The first PLMN list is read from the USIM by the terminal in response to the PLMN overall display policy instruction that the PLMN manual network selection mode restricts the display of PLMNs, and according to the instruction of the PLMN display policy change command.

[0183] Example 5:

[0184] Embodiment 5 of the present invention provides a computer-readable storage medium storing a computer program. When the computer program is run by a processor, it implements the network display control method as described in Embodiment 1 or 2.

[0185] The computer-readable storage medium includes volatile or non-volatile, removable or non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, computer program modules, or other data). Computer-readable storage media include, but are not limited to, RAM (Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), flash memory or other memory technologies, CD-ROM (Compact Disc Read-Only Memory), DVD or other optical disc storage, cartridges, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer.

[0186] In addition, the present invention may also provide a computer device including a memory and a processor, wherein the memory stores a computer program, and when the processor runs the computer program stored in the memory, the processor executes the network display control method as described in Embodiment 1 or 2.

[0187] The memory is connected to the processor. The memory can be flash memory, read-only memory or other types of memory. The processor can be a central processing unit or a microcontroller.

[0188] Furthermore, the present invention can also provide a network display control system, including a terminal for implementing the network display control method as described in Embodiment 1, and a USIM for implementing the network display control method as described in Embodiment 2.

[0189] Embodiments 1-5 of this invention provide a network display control method, a terminal, a USIM (United States Imaging Module), and a computer-readable storage medium. In manual network selection mode, the terminal requests the USIM whether to change the PLMN display policy. The USIM provides the terminal with commands and control files for changing the PLMN display policy. Based on this, the terminal obtains the latest PLMN display policy and displays only PLMNs that meet the policy. This provides management and control for the terminal's manual network selection mode, enabling the USIM to control the terminal to change the network display in manual network selection mode based on real-time network status and other information. This allows the terminal to achieve flexible PLMN display in manual network selection mode based on the real-time configuration of the PLMN display control file by the USIM. This helps users avoid selecting unsuitable networks, further protecting user interests in terms of service quality and economic costs. It also strengthens operator business management and enhances commercial interests in protocol network selection.

[0190] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A network display control method, characterized in that, Applied to a terminal, the method includes: In response to entering the manual network selection mode of the Public Land Mobile Network (PLMN), obtain the PLMN display policy change command from the General Subscriber Identity Module (USIM); According to the PLMN display strategy change command, obtain the PLMN display control file from USIM, and construct the latest PLMN display strategy in PLMN manual grid selection mode based on the PLMN display control file, specifically including: In response to receiving the PLMN display policy change command, a PLMN overall display policy of the USIM is read, the PLMN overall display policy indicating whether to limit display of the PLMN in a PLMN manual network selection mode, the PLMN overall display policy being preconfigured in an additional information part in a management data file EF AD , In response to the PLMN overall display policy instruction to restrict the display of PLMNs in PLMN manual network selection mode, the first PLMN list of the USIM is read according to the PLMN display policy change command. The first PLMN list includes a first user-controlled PLMN list and / or a first operator-controlled PLMN list. The first PLMN list includes the display instructions of the PLMNs in PLMN manual network selection mode. The first user-controlled PLMN list is configured or updated by the USIM according to user needs, and the first operator-controlled PLMN list is configured or updated by the USIM according to operator needs. A second PLMN list is constructed based on the first PLMN list. The second PLMN list only includes PLMNs that are displayed in the manual PLMN selection mode as indicated in the first PLMN list. The second PLMN list is used as the latest PLMN display strategy in the manual PLMN selection mode. In response to the searched PLMNs found in the manual PLMN selection mode, the PLMNs in the searched PLMNs are displayed according to the latest PLMN display strategy, specifically including: In response to the latest PLMN display strategy which includes a second PLMN list, PLMNs that belong to both the search PLMN and the second PLMN list are displayed.

2. The method according to claim 1, characterized in that, In response to entering PLMN manual grid selection mode, obtain PLMN display policy change commands from USIM, specifically including: In response to a user changing the PLMN automatic network selection mode to the PLMN manual network selection mode, a network search mode change information is sent to the USIM. Receive a PLMN display policy change command from USIM. The PLMN display policy change command is read by USIM based on the network search mode change information.

3. The method according to claim 2, characterized in that, The first PLMN list includes the PLMN identifier, access technology identifier, and display indicator identifier of the PLMN that can be displayed in the manual network selection mode. The PLMN identifier, access technology identifier, and display indicator identifier are each recorded in the first PLMN list using a TLV structure that includes a tag, length, and value.

4. The method according to claim 3, characterized in that, A second PLMN list is constructed based on the first PLMN list. The second PLMN list only includes PLMNs that are displayed in the manual PLMN selection mode as indicated in the first PLMN list. Specifically, these include: Obtain the PLMN identifier, access technology identifier, and display indicator identifier for each PLMN in the first PLMN list; In response to the discovery that a certain PLMN has a display indicator, the PLMN identifier and access technology identifier of that PLMN are added to the second PLMN list; In response to a PLMN not having a display indicator, the PLMN identifier and access technology identifier of that PLMN will not be added to the second PLMN list. The first PLMN list also includes the PLMN identifier and access technology identifier of PLMNs that cannot be displayed in the manual network selection mode.

5. The method according to claim 1, characterized in that, Based on the PLMN display control file, the latest PLMN display strategy in manual mesh selection mode is constructed, specifically including: In response to the overall PLMN display policy instruction that the PLMN should not be restricted from displaying in the manual PLMN selection mode, the latest PLMN display policy in the manual PLMN selection mode is determined to be to not restrict the display of the PLMN.

6. The method according to claim 5, characterized in that, According to the latest PLMN display strategy, the search for PLMNs within PLMNs will be displayed, specifically including: In response to the latest PLMN display strategy, the display of PLMNs is not restricted in the manual PLMN selection mode, and all searched PLMNs are displayed.

7. A network display control method, characterized in that, The method, applied to the Universal User Identification Module (USIM), includes: The terminal is provided with a Public Land Mobile Network (PLMN) policy change command. The PLMN policy change command is obtained from the USIM by the terminal in response to entering the PLMN manual network selection mode. Provide the PLMN display control file for the terminal. The PLMN display control file consists of: The terminal obtains the PLMN display policy change command from the USIM, enabling it to construct the latest PLMN display policy in manual PLMN selection mode according to the PLMN display control file. In response to the searched PLMN in manual PLMN selection mode, the terminal displays the PLMN in the searched PLMN according to the latest PLMN display policy, specifically including: Upon receiving a PLMN display policy change command, the terminal reads the overall PLMN display policy from the USIM. This overall PLMN display policy indicates whether to restrict PLMN display in manual network selection mode. The overall PLMN display policy is pre-configured in the management data file EF. AD Additional information section In response to the PLMN overall display policy instruction that the PLMN manual network selection mode restricts the display of PLMNs, the terminal reads the first PLMN list from the USIM according to the PLMN display policy change command. The first PLMN list includes a first user-controlled PLMN list and / or a first operator-controlled PLMN list. The first PLMN list includes the display instructions for PLMNs in PLMN manual network selection mode. The first user-controlled PLMN list is configured or updated by the USIM according to user needs, and the first operator-controlled PLMN list is configured or updated by the USIM according to operator needs. The terminal constructs a second PLMN list based on the first PLMN list. The second PLMN list only includes PLMNs that are indicated as displayable in the manual PLMN selection mode from the first PLMN list. The second PLMN list serves as the latest PLMN display strategy in the manual PLMN selection mode. The terminal responds to the latest PLMN display strategy, which includes a second PLMN list, by displaying PLMNs that belong to both the searched PLMN and the second PLMN list.

8. The method according to claim 7, characterized in that, Before providing the PLMN display policy change command to the terminal, the method further includes: Configure or update the overall PLMN display policy, which indicates whether to restrict the display of the PLMN in manual network selection mode. Configure or update the first user-controlled PLMN list according to user needs, and configure or update the first operator-controlled PLMN list according to operator needs. The first user-controlled PLMN list and the first operator-controlled PLMN list together constitute the first PLMN list, which includes the display indication of the PLMN in the PLMN manual network selection mode. The PLMN display control file consists of the first PLMN list and the overall PLMN display strategy.

9. The method according to claim 8, characterized in that, The first PLMN list includes the PLMN identifier, access technology identifier, and display indicator identifier of the PLMN that can be displayed in the manual network selection mode. The PLMN identifier, access technology identifier, and display indicator identifier are each recorded in the first PLMN list using a TLV structure that includes a tag, length, and value.

10. The method according to any one of claims 7-9, characterized in that, Provides the terminal with PLMN display policy change commands. These commands are obtained from the USIM by the terminal in response to entering PLMN manual network selection mode, and specifically include: Receive network search mode change information from the terminal. The network search mode change information is sent by the terminal to the USIM in response to the user changing the PLMN automatic network selection mode to the PLMN manual network selection mode. Based on the network search mode change information, a PLMN display policy change command is generated to instruct the terminal to read the first PLMN list of the USIM and then sent to the terminal.

11. A terminal, characterized in that, The terminal includes: The first acquisition module is used to acquire the PLMN display policy change command from the General Subscriber Identity Module (USIM) in response to entering the manual network selection mode of the Public Land Mobile Network (PLMN). The second acquisition module, connected to the first acquisition module, is used to acquire the PLMN display control file from the USIM according to the PLMN display strategy change command, and to construct the latest PLMN display strategy in the PLMN manual grid selection mode according to the PLMN display control file. Specifically, it includes: In response to receiving a PLMN display policy change command, the system reads the overall PLMN display policy from the USIM. This overall PLMN display policy indicates whether to restrict PLMN display in manual network selection mode. The overall PLMN display policy is pre-configured in the management data file EF. AD Additional information section In response to the PLMN overall display policy instruction to restrict the display of PLMNs in PLMN manual network selection mode, the first PLMN list of the USIM is read according to the PLMN display policy change command. The first PLMN list includes a first user-controlled PLMN list and / or a first operator-controlled PLMN list. The first PLMN list includes the display instructions of the PLMNs in PLMN manual network selection mode. The first user-controlled PLMN list is configured or updated by the USIM according to user needs, and the first operator-controlled PLMN list is configured or updated by the USIM according to operator needs. A second PLMN list is constructed based on the first PLMN list. The second PLMN list only includes PLMNs that are displayed in the manual PLMN selection mode as indicated in the first PLMN list. The second PLMN list is used as the latest PLMN display strategy in the manual PLMN selection mode. The display module, connected to the second acquisition module, is used to respond to the searched PLMN found in the PLMN manual selection mode, and display the PLMN in the searched PLMN according to the latest PLMN display strategy, specifically including: In response to the latest PLMN display strategy which includes a second PLMN list, PLMNs that belong to both the search PLMN and the second PLMN list are displayed.

12. A universal user identification module (USIM), characterized in that, The USIM includes: The first providing module is used to provide the terminal with a Public Land Mobile Network (PLMN) display policy change command. The PLMN display policy change command is obtained by the terminal from the USIM in response to entering the PLMN manual network selection mode. The second providing module, connected to the first providing module, is used to provide the PLMN display control file to the terminal. The PLMN display control file consists of: The terminal obtains the PLMN display policy change command from the USIM, enabling it to construct the latest PLMN display policy in manual PLMN selection mode according to the PLMN display control file. In response to the searched PLMN in manual PLMN selection mode, the terminal displays the PLMN in the searched PLMN according to the latest PLMN display policy, specifically including: Upon receiving a PLMN display policy change command, the terminal reads the overall PLMN display policy from the USIM. This overall PLMN display policy indicates whether to restrict PLMN display in manual network selection mode. The overall PLMN display policy is pre-configured in the management data file EF. AD Additional information section In response to the PLMN overall display policy instruction that the PLMN manual network selection mode restricts the display of PLMNs, the terminal reads the first PLMN list from the USIM according to the PLMN display policy change command. The first PLMN list includes a first user-controlled PLMN list and / or a first operator-controlled PLMN list. The first PLMN list includes the display instructions for PLMNs in PLMN manual network selection mode. The first user-controlled PLMN list is configured or updated by the USIM according to user needs, and the first operator-controlled PLMN list is configured or updated by the USIM according to operator needs. The terminal constructs a second PLMN list based on the first PLMN list. The second PLMN list only includes PLMNs that are indicated as displayable in the manual PLMN selection mode from the first PLMN list. The second PLMN list serves as the latest PLMN display strategy in the manual PLMN selection mode. The terminal responds to the latest PLMN display strategy, which includes a second PLMN list, by displaying PLMNs that belong to both the searched PLMN and the second PLMN list.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the network display control method as described in any one of claims 1-6 or 7-10.

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