WO2020024689A1 - Network searching method, terminal device, and computer readable storage medium - Google Patents

Abstract

Disclosed in the present invention is a network searching method, the method comprising: acquiring a public land mobile network (PLMN) identification, and reading a local PLMN file, the local PLMN file being used to save a PLMN identification corresponding to an operator that only deploys a Long-Term Evolution (LTE) network; if the PLMN identification and the local PLMN file match, only searching an LTE network corresponding to the PLMN identification according to the PLMN identification so as to register and access the LTE network. Simultaneously disclosed in the embodiments of the present invention are a terminal and a computer readable storage medium.

Description

Network search method, terminal device, and computer-readable storage medium

Cross-reference to related applications

This application is based on a Chinese patent application with an application number of 201810859153.X and an application date of July 31, 2018, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is incorporated herein by reference. Application.

Technical field

Embodiments of the present invention relate to the field of mobile communication technologies, and relate to, but are not limited to, a network search method, a terminal device, and a computer-readable storage medium.

Background technique

In practical applications, the operator networks deployed in different countries and regions are different; however, in order to save the cost of network deployment, many operators only deploy Long Term Evolution (LTE) networks, such as JIO operators in India .

At present, terminal equipment still uses the existing network search technology in areas where only LTE networks are deployed, that is, to search the entire frequency band network; that is, when searching for the network, the terminal needs to search not only the LTE network, but also 3G and 2G. Corresponding network.

However, the use of this traditional network search method in areas where only LTE networks are deployed will undoubtedly extend the time of network search; in addition, in areas where priority search is made for 3G and 2G corresponding networks, terminal devices may appear to search for 3G and 2G Corresponding network conditions, resulting in terminal equipment can not normally access the network, resulting in increased customer complaints.

Summary of the invention

To solve the above technical problems, embodiments of the present invention provide a network search method, a terminal device, and a computer-readable storage medium.

An embodiment of the present invention provides a network search method. The method includes:

Obtaining a Public Land Mobile Network (PLMN) identity and reading a local PLMN file, where the local PLMN file is used to store a PLMN identity corresponding to an operator that only deploys a long-term evolution LTE network;

If the PLMN identity matches the local PLMN file, according to the PLMN identity, only the LTE network corresponding to the PLMN identity is searched to register to access the LTE network.

An embodiment of the present invention further provides a terminal device. The terminal device includes: an obtaining unit and a processing unit, where:

The obtaining unit is configured to obtain a public land mobile network PLMN identity and read a local PLMN file, where the local PLMN file is used to save a PLMN identity corresponding to an operator deploying only an LTE network;

The processing unit is configured to, if the PLMN identifier matches the local PLMN file, search only the LTE network corresponding to the PLMN identifier to register to access the LTE network according to the PLMN identifier.

An embodiment of the present invention further provides a terminal device, where the terminal device includes a processor and a memory configured to store a computer program capable of running on the processor,

Wherein, when the processor is configured to execute the computer program, the processor executes the steps of the network search method.

An embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored, and the computer program is executed by a processor to implement the steps of the foregoing network search method.

The network search method, terminal device, and computer-readable storage medium provided by the embodiments of the present invention first obtain a public land mobile network PLMN identity and read a local PLMN file; wherein the local PLMN file is used to save only a long-term evolution LTE network The PLMN identity corresponding to the operator; if the PLMN identity matches the local PLMN file, according to the PLMN identity, only the LTE network corresponding to the PLMN identity is searched to register for access to the LTE network; thus, the PLMN identity is stored internally with the terminal device. The identity of the deployed LTE-only network can be matched to find out whether the current operator has deployed the LTE-only network. If the result of the judgment is yes, the terminal device searches only the LTE network corresponding to the PLMN. Only searching for LTE networks in the region of the network can improve the timeliness of the network search, and at the same time, reduce the rate of cancellations caused by abnormal network searches and the number of customer complaints.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic flowchart of a network search method according to an embodiment of the present invention;

2 is a schematic flowchart of another network search method according to an embodiment of the present invention;

3 is a schematic diagram of a system architecture of a network search method according to an embodiment of the present invention;

4 is a schematic flowchart of another network search method according to an embodiment of the present invention;

5 is a schematic structural composition diagram of a terminal device according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a hardware structure of a terminal device according to an embodiment of the present invention.

detailed description

In order to understand the features and technical contents of the embodiments of the present invention in more detail, the implementation of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference only and are not intended to limit the embodiments of the present invention.

In actual applications, the terminal device searches the current network after the device is turned on or restarted. In general, the terminal device performs a full-band search of the current network, including LTE networks and 2G and 3G corresponding networks, to complete network registration.

With the continuous expansion of the application range of LTE networks, and in order to save the cost of network deployment, many operators have not established 2G and 3G networks, but have only deployed LTE networks; in this case, terminal equipment still uses the original The method of network search will inevitably increase the time of network search, thereby reducing the efficiency of network search; even, the terminal device may always search the network corresponding to 3G and 2G, resulting in the terminal device not being able to access the network normally, resulting in Consequences of increased customer complaints.

In order to solve such a problem of abnormal network search caused by incomplete network deployment, an embodiment of the present invention provides a network search method, which compares a searched PLMN identifier with a locally saved PLMN identifier that only deploys an LTE network. To determine whether the operator corresponding to the currently searched PLMN identity is an operator that has only deployed the LTE network; if the determination result is yes, the terminal device no longer searches the networks corresponding to 2G and 3G, but only searches the LTE network and registers , Improve the timeliness of network search, at the same time, reduce the rate of rejection caused by abnormal network search and the number of customer complaints.

FIG. 1 is a schematic flowchart of a network search method according to an embodiment of the present invention. As shown in FIG. 1, the network search method includes the following steps:

Step 101: Obtain a public land mobile network PLMN identity, and read a local PLMN file.

Here, step 101 obtains the public land mobile network PLMN identity and reads the local PLMN file. It can be implemented by a terminal device. Here, a terminal device refers to a communication terminal device capable of connecting a mobile communication network and a wireless network, including but not limited to: Mobile phones, smart TVs, tablet computers, Ultra-mobile Personal Computers (UMPCs), netbooks, Personal Digital Assistants (PDAs), etc.

Further, after the terminal device is turned on or restarted, or when it enters another area B from area A, that is, the terminal device leaves the coverage area of the operator's network in area A and enters the coverage area of the operator's network; at this time, A terminal device in an offline state is waiting on a Broadcast Channel (BCH) and can receive broadcast messages sent by a base station; the terminal device can obtain the PLMN identity of the currently accessible network by analyzing the broadcast messages. Here, the PLMN logo is a network established and operated by the government or its approved operator for the purpose of providing land mobile communication services to the public. The PLMN identification is composed of a mobile country code (MCC) and a mobile network code (MNC). Among them, the MCC is composed of 3 digits and can uniquely identify the country to which the mobile customer belongs. For example, China's 460, The United States is 316 and Singapore is 525. In addition, MNC consists of 2 digits to identify the mobile network to which the mobile customer belongs. For example, China Mobile's GSM, TD-SCDMA, and LTE are 00/02/07, China Unicom's GSM is 01, and China Telecom's CDMA is 030.

Further, the foregoing local PLMN file is a file preset inside the terminal device; here, the local PLMN file is used to store a PLMN identity corresponding to an operator who only deploys an LTE network. That is, the local PLMN file stores in advance a PLMN identity corresponding to an operator that has only deployed an LTE network. Here, the PLMN ID corresponding to the operator only deploying the LTE network in the local PLMN file may be obtained from a preset server through a network connection; wherein the preset server can save the PLMN ID corresponding to all operators deploying only the LTE network in the world. . Therefore, as long as the terminal devices in the world are connected to the network, they can automatically connect to this server, obtain the PLMN identity of the operator that only deploys the LTE network, and save the PLMN identity to a local file of the terminal device.

Step 102: If the PLMN identity matches the local PLMN file, according to the PLMN identity, only the LTE network corresponding to the PLMN identity is searched to register to access the LTE network.

Here, in step 102, if the PLMN identity matches the local PLMN file, according to the PLMN identity, searching only the LTE network corresponding to the PLMN identity to register and access the LTE network may be implemented by a terminal device.

Specifically, when the obtained PLMN identity of the accessible network matches the local PLMN file, it can be determined that the operator corresponding to the current PLMN identity is an operator that has only deployed an LTE network. Then the terminal device attempts to register in the LTE network corresponding to the PLMN identity.

The network search method provided by the embodiment of the present invention first obtains a public land mobile network PLMN identity and reads a local PLMN file. The local PLMN file is used to store a PLMN identity where only a long-term evolution LTE network is deployed. File matching. According to the PLMN identification, only the LTE network corresponding to the PLMN identification is searched to register to access the LTE network. In this way, by matching the PLMN identification with the identification of the deployment-only LTE network stored inside the terminal device, it is possible to know the current Whether the operator has only deployed the LTE network. If the judgment result is yes, the terminal device searches only the LTE network corresponding to the PLMN; thus, only the LTE network is searched in the area where only the LTE network is deployed, which can improve the network. The timeliness of search, meanwhile, it reduces the rate of cancellations caused by abnormal Internet searches and the amount of customer complaints.

Based on the foregoing embodiments, an embodiment of the present invention provides a network search method. As shown in FIG. 2, the network search method includes the following steps:

Step 201: The terminal device obtains PLMN list information from a preset server.

Here, the preset server refers to an electronic device capable of providing a network search service for a terminal device, and can be distributed in various regions around the world to provide services to all terminal devices in the world; wherein the preset server can maintain a PLMN list, The PLMN list is used to record a PLMN identity corresponding to an operator who has only deployed an LTE network in various regions of the world. In practical applications, the PLMN list in the preset server can be dynamically configured, that is, a PLMN identity can be added to or deleted from the PLMN list.

Further, the terminal device may automatically establish a connection with the preset server through WIFI or a data network, and obtain PLMN list information from the preset server.

It should be noted that the terminal device may obtain the PLMN list information from a preset server at a preset time interval;

Or when it is detected that the status of the current geographic location changes, the PLMN list information is obtained from a preset server.

Here, the preset time interval may be a fixed time period or may be obtained according to a preset time algorithm, which is not limited in this embodiment of the present invention. In addition, the change of geographic position status can be determined by the Global Positioning System (GPS) chip that comes with the terminal device, which will not be described again here.

In other embodiments of the present invention, step 201 may further include the following steps:

Step 2011: The terminal device obtains an update data packet from a preset server;

Step 2012: If the PLMN list is included in the update data packet, the terminal device obtains the PLMN list information.

In practical applications, the data configured in the preset server is dynamically changed; therefore, the terminal device needs to periodically obtain updated data from the preset server, that is, the update data packet. Further, when the terminal device determines that the PLMN list is included in the update packet, it can be considered that the PLMN list maintained in the preset server is updated, and the terminal device can obtain the PLMN list information in the PLMN list, so that the terminal device stores the PLMN list information. The PLMN identity corresponding to the operator deploying only the LTE network is consistent with the information in the PLMN list of the preset server.

Step 202: The terminal device parses the PLMN list information, and loads the parsed PLMN list information into the local PLMN file.

Here, the terminal device needs to parse the obtained PLMN list information, obtain a PLMN identity corresponding to each operator that has only deployed an LTE network, and save and load the PLMN identity into a local PLMN file.

Step 203: Obtain the PLMN identity of the public land mobile network, and read the local PLMN file.

Wherein, the local PLMN file is used to save a PLMN identity where only a long-term evolution LTE network is deployed.

Step 204: When the PLMN identifier is the same as any PLMN identifier in the local PLMN file, the terminal device initiates network registration at an LTE network frequency corresponding to the PLMN identifier.

Specifically, the terminal device matches the currently acquired PLMN identification with all the PLMN identifications corresponding to all operators deploying only the LTE network stored in the local PLMN file; when the PLMN identification matches any one of the PLMNs in the local PLMN file When the identifiers are the same, the terminal device initiates network registration for the frequency point corresponding to the LTE network.

It should be noted that, for the explanation of the same steps or related concepts in this embodiment as in other embodiments, reference may be made to the description in other embodiments, and details are not described herein again.

The network search method provided by the embodiment of the present invention first obtains a public land mobile network PLMN identity and reads a local PLMN file; wherein the local PLMN file is used to save a PLMN identity where only a long-term evolution LTE network is deployed; if the PLMN identity and the local PLMN are File matching. According to the PLMN identification, only the LTE network corresponding to the PLMN identification is searched to register to access the LTE network. In this way, by matching the PLMN identification with the identification of the deployment-only LTE network stored inside the terminal device, it is possible to know the current Whether the operator has only deployed the LTE network. If the judgment result is yes, the terminal device searches only the LTE network corresponding to the PLMN; thus, only the LTE network is searched in the area where only the LTE network is deployed, which can improve the network. The timeliness of search, meanwhile, it reduces the rate of cancellations caused by abnormal Internet searches and the amount of customer complaints.

Hereinafter, the present invention is described in further detail in combination with an application embodiment.

The network search method provided by this application embodiment may be applied to the system architecture shown in FIG. 3, and the system architecture may include a server side and a terminal device side, wherein the terminal device side is further provided by an application service layer and a modem. (Modem) layer structure.

This application embodiment provides a network search method. As shown in FIG. 3, the network search method includes the following steps:

Step 301: The application service layer of the terminal device obtains an update data packet in the server.

Here, the application service layer can connect to the server through a wireless network to obtain data in the server; wherein the wireless network includes WiFi or a data network.

It should be noted that the terminal device can obtain data in the server at any time when the network is connected.

Step 302: The application service layer of the terminal device saves the update data packet to an update database of the terminal device.

Here, the update database may be a RomUpdate.db database; the RomUpdate.db database is used to store update data of the application service layer.

Step 303: The application service layer determines whether a PLMN list is included in the update database.

In practical applications, the server can maintain a list of PLMNs; specifically, the server can write the PLMN identification corresponding to the operator who has only deployed the LTE network into the "onlyLTEPlmn.xml" file to obtain the PLMN list. When the PLMN list in the server changes, the server can compress and pack the PLMN list into an update data packet and send it to the terminal device.

Step 304: The application service layer reads and parses the PLMN list to obtain PLMN list information.

Specifically, the application service layer can parse the PLMN identifier corresponding to the operator who has only deployed the LTE network from the PLMN list to obtain the PLMN list information.

Step 305: The application service layer sends the above PLMN list information to the Modem layer through a data transmission channel, and writes the PLMN list information into a local PLMN file in the Modem layer.

Step 306: The Modem layer starts to obtain the current PLMN identity.

Here, the Modem layer may be started when the terminal device is powered on or restarted, and enters the network after being disconnected from the network.

Step 307: The Modem layer judges whether the obtained current PLMN identity matches the local PLMN file.

Step 308: If the determination result is a match, the Modem layer registers the LTE network corresponding to the PLMN identity.

It should be noted that steps 301-305 are the process of updating the local PLMN file, and steps 306-308 are the specific process of performing a network search. Among them, steps 301 to 305 are the basis of steps 306 to 308; steps 301 to 305 can be performed when the terminal device is connected to the network; and steps 306 to 308 are performed when the terminal device is turned on or restarted, or after entering the network after being offline. . Steps 301 to 305 and steps 306 to 308 are performed in no particular order, and the embodiment of the present invention is not limited herein.

The network search method provided by the embodiment of the present invention first obtains a public land mobile network PLMN identity and reads a local PLMN file; wherein the local PLMN file is used to save a PLMN identity where only a long-term evolution LTE network is deployed; if the PLMN identity and the local PLMN are File matching. According to the PLMN identification, only the LTE network corresponding to the PLMN identification is searched to register to access the LTE network. In this way, by matching the PLMN identification with the identification of the deployment-only LTE network stored inside the terminal device, it is possible to know the current Whether the operator has only deployed the LTE network. If the judgment result is yes, the terminal device searches only the LTE network corresponding to the PLMN; thus, only the LTE network is searched in the area where only the LTE network is deployed, which can improve the network. The timeliness of search, meanwhile, it reduces the rate of cancellations caused by abnormal Internet searches and the amount of customer complaints.

Based on the foregoing embodiments, this application embodiment provides a network search method. As shown in FIG. 4, the network search method includes the following steps:

Step 401: Obtain an update data packet of the server.

Step 402: Save the update data package to RomUpdate.db.

Step 403: Send a broadcast message that the update is successful.

Step 404: When the application service layer detects that the RomUpdate.db is updated or listens to a broadcast message that the update is successful, it is determined whether the RomUpdate.db includes the onlyLTEPlmn.xml file. If the determination result is yes, step 405 is performed; if the determination result is no, step 409 is performed.

Step 405: Parse the onlyLTEPlmn.xml file to obtain configuration data.

Step 406: Convert the data format of the MCC and MNC corresponding to the PLMN identification in the onlyLTEPlmn.xml file.

Step 407: Save the converted MCC and MNC into an array to obtain PLMN list information.

Step 408: Write the PLMN list information to a local PLMN file in the Modem layer.

Step 409: Prompt the completion of updating the local PLMN file.

Step 410: The Modem layer starts to obtain the current PLMN identity.

Step 411: The Modem layer judges whether the obtained current PLMN identity matches the local PLMN file.

Step 412: If the determination result is a match, the Modem layer attempts to register the LTE network corresponding to the PLMN identity.

It should be noted that, for the explanation of the same steps or related concepts in this embodiment as in other embodiments, reference may be made to the description in other embodiments, and details are not described herein again.

The network search method provided by the embodiment of the present invention first obtains a public land mobile network PLMN identity and reads a local PLMN file; wherein the local PLMN file is used to store a PLMN identity where only a long-term evolution LTE network is deployed; if the PLMN identity and the local PLMN File matching. According to the PLMN identification, only the LTE network corresponding to the PLMN identification is searched to register to access the LTE network. In this way, by matching the PLMN identification with the identification of the deployment-only LTE network stored inside the terminal device, it is possible to know the current Whether the operator has only deployed the LTE network. If the judgment result is yes, the terminal device searches only the LTE network corresponding to the PLMN; thus, only the LTE network is searched in the area where only the LTE network is deployed, which can improve the network. The timeliness of search, meanwhile, it reduces the rate of cancellations caused by abnormal Internet searches and the amount of customer complaints.

To implement the method of the embodiment of the present invention, an embodiment of the present invention further provides a terminal device. As shown in FIG. 5, the terminal device includes: an obtaining unit 51 and a processing unit 52, where:

The obtaining unit 51 is configured to obtain a public land mobile network PLMN identity and read a local PLMN file, where the local PLMN file is used to store a PLMN identity corresponding to an operator that only deploys an LTE network;

The processing unit 52 is configured to, if the PLMN identifier matches the local PLMN file, search only the LTE network corresponding to the PLMN identifier to register to access the LTE network according to the PLMN identifier.

In other embodiments of the present invention, the obtaining unit 51 is further configured to obtain PLMN list information from a preset server; wherein the PLMN list information includes a PLMN identifier corresponding to an operator deploying only an LTE network worldwide;

Preferably, the obtaining unit 51 may be configured as:

Obtaining PLMN list information from the preset server at a preset time interval;

Or when detecting a change in the current geographic position status, obtaining the PLMN list information from the preset server.

The processing unit 52 is further configured to parse the PLMN list information and load the parsed PLMN list information into the local PLMN file.

In other embodiments, the obtaining unit 51 may be further configured to obtain an update data packet from a preset server; if the update data packet includes a PLMN list, obtain the PLMN list information.

In other embodiments of the present invention, the processing unit 52 is specifically configured to: when the PLMN identity is the same as the PLMN identity corresponding to any operator in the local PLMN file that only deploys an LTE network, in the Network registration is initiated at the frequency of the LTE network corresponding to the PLMN identity.

A terminal device provided by an embodiment of the present invention first obtains a public land mobile network PLMN identity and reads a local PLMN file; wherein the local PLMN file is used to save a PLMN identity corresponding to an operator that only deploys a long-term evolution LTE network; if The PLMN ID matches the local PLMN file. According to the PLMN ID, only the LTE network corresponding to the PLMN ID is searched to register to access the LTE network. In this way, the PLMN ID is matched with the ID of the deployment-only LTE network stored inside the terminal device. Match, you can know whether the current operator has only deployed the LTE network. If the judgment result is yes, the terminal device searches only the LTE network corresponding to the PLMN; thus, only the LTE network is deployed in the area where only the LTE network is deployed. Searching can improve the timeliness of online search, and at the same time, reduce the rate of cancellations caused by abnormal network search and the amount of customer complaints.

Based on the hardware implementation of each unit in the terminal device described above, in order to implement the network search method provided in the embodiment of the present invention, an embodiment of the present invention further provides a terminal device. As shown in FIG. 6, the terminal device 60 includes: a processor 61 and a memory 62 configured to store a computer program capable of running on a processor,

Wherein, the processor 61 is configured to execute the method steps in the foregoing embodiments when the computer program is run.

Of course, in actual application, as shown in FIG. 6, various components in the terminal device 60 are coupled together through a bus system 63. It can be understood that the bus system 63 is configured to realize connection communication between these components. The bus system 63 includes a power bus, a control bus, and a status signal bus in addition to the data bus. However, for the sake of clarity, various buses are marked as the bus system 63 in FIG. 6.

In an exemplary embodiment, an embodiment of the present invention further provides a computer-readable storage medium, such as a memory 62 including a computer program, and the computer program may be executed by the processor 61 of the terminal device 60 to complete the steps of the foregoing method. . The computer-readable storage medium may be magnetic random access memory (FRAM, ferromagnetic random access memory), read-only memory (ROM, Read Only Memory), programmable read-only memory (PROM, Programmable Read-Only Memory), and erasable Programmable Read-Only Memory (EPROM, Erasable, Programmable, Read-Only Memory), Electrically Erasable Programmable Read-Only Memory (EEPROM, Electrically Erasable, Programmable Read-Only Memory), Flash Memory (Flash Memory), Magnetic Surface Memory, Optical Disk , Or read-only discs (CD-ROM, Compact Disc-Read-Only Memory) and other storage.

The technical solutions described in the embodiments of the present invention can be arbitrarily combined without conflict.

In the several embodiments provided by the present invention, it should be understood that the disclosed method and smart device may be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, such as multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed components are coupled, or directly coupled, or communicated with each other through some interfaces. The indirect coupling or communication connection of the device or unit may be electrical, mechanical, or other forms. of.

The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, which may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into a second processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into a unit; The above integrated unit may be implemented in the form of hardware, or in the form of hardware plus software functional units.

The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present invention. It should be covered by the protection scope of the present invention.

Industrial applicability

In the embodiment of the present invention, the public land mobile network PLMN identity is obtained and the local PLMN file is read. The local PLMN file is used to save the PLMN identity corresponding to the operator who only deploys the long-term evolution LTE network. Matching: According to the PLMN identity, only the LTE network corresponding to the PLMN identity is searched to register for access to the LTE network; in this way, by matching the PLMN identity with the identity of the deployment-only LTE network stored inside the terminal device, the current operation can be known If the vendor only deploys the LTE network, if the judgment result is yes, the terminal device searches only the LTE network corresponding to the PLMN; in this way, only the LTE network is searched in the area where only the LTE network is deployed, which can improve the network search. Timeliness, at the same time, reduce the rate of cancellations caused by abnormal network searches and the number of customer complaints.

Claims (10)

A network search method, the method includes: Obtaining a public land mobile network PLMN identity and reading a local PLMN file, where the local PLMN file is used to store a PLMN identity corresponding to an operator that only deploys a long-term evolution LTE network; If the PLMN identity matches the local PLMN file, according to the PLMN identity, only the LTE network corresponding to the PLMN identity is searched to register to access the LTE network. The method according to claim 1, wherein before the obtaining a public land mobile network PLMN identity and a local PLMN file, the method further comprises: Obtaining PLMN list information from a preset server, where the PLMN list information includes a PLMN identity corresponding to an operator deploying only an LTE network worldwide; Parse the PLMN list information, and load the parsed PLMN list information into the local PLMN file. The method according to claim 2, wherein the obtaining the PLMN list information from a preset server further comprises: Obtaining an update data packet from a preset server; If the PLMN list is included in the update data packet, the PLMN list information is acquired. The method according to claim 2 or 3, wherein the obtaining the PLMN list information from a preset server comprises: Obtaining PLMN list information from the preset server at a preset time interval; Or when detecting a change in the current geographic position status, obtaining the PLMN list information from the preset server. The method according to claim 1, wherein if the PLMN identification matches the local PLMN file, according to the PLMN identification, only the LTE network corresponding to the PLMN identification is searched to register to access the LTE network. ,include: When the PLMN identity is the same as the PLMN identity corresponding to any operator in the local PLMN file that only deploys an LTE network, network registration is initiated at the LTE network frequency corresponding to the PLMN identity. A terminal device includes: an obtaining unit and a processing unit, wherein: The obtaining unit is configured to obtain a public land mobile network PLMN identity and read a local PLMN file, where the local PLMN file is used to save a PLMN identity corresponding to an operator deploying only an LTE network; The processing unit is configured to, if the PLMN identifier matches the local PLMN file, search only the LTE network corresponding to the PLMN identifier to register to access the LTE network according to the PLMN identifier. The terminal device according to claim 6, wherein: The obtaining unit is further configured to obtain PLMN list information from a preset server, wherein the PLMN list information includes a PLMN identity corresponding to an operator deploying only an LTE network in the world; The processing unit is further configured to parse the PLMN list information and load the parsed PLMN list information into the local PLMN file. The terminal device according to claim 7, wherein: The obtaining unit is specifically configured to obtain an update data packet from a preset server; if the update data packet includes a PLMN list, obtain the PLMN list information. A terminal device, wherein the terminal device includes a processor and a memory configured to store a computer program capable of running on the processor, Wherein, when the processor is configured to run the computer program, the processor executes the steps of the method according to any one of claims 1 to 5. A computer-readable storage medium having stored thereon a computer program that, when executed by a processor, implements the steps of the network search method according to any one of claims 1 to 5. .

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