WO2020087417A1

WO2020087417A1 - Pseudo base station identification method and device, mobile terminal and storage medium

Info

Publication number: WO2020087417A1
Application number: PCT/CN2018/113207
Authority: WO
Inventors: 李伟清; 王芷
Original assignee: 深圳市欢太科技有限公司; Oppo广东移动通信有限公司
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2020-05-07
Also published as: CN112673662A; CN112673662B

Abstract

Disclosed by embodiments of the present application are a pseudo base station identification method and device, a mobile terminal and a storage medium. The method comprises: determining a target base station; sending to the target base station a registration request for registration to a mobile communication network; detecting whether registration is successful; and if detected that the registration request fails, determining the target base station to be a pseudo base station. In the method, it is determined whether a target base station is a pseudo base station by means of detecting whether a registration request for registration to a mobile communication network that is sent to the target base station is successful, thereby improving the security of a mobile terminal and reducing the probability of leaking information of the mobile terminal.

Description

Pseudo base station identification method, device, mobile terminal and storage medium

Technical field

The present application relates to the field of communication technology, and more specifically, to a pseudo base station identification method, device, mobile terminal, and storage medium.

Background technique

"Pseudo base station" is a fake base station. The pseudo base station is generally composed of a host computer and a laptop computer. It can retrieve mobile phone card information centered on it and within a certain radius through the SMS group sender, SMS sender and other related equipment, using mobile communications The shortcomings of the system, by disguising themselves as the base station of the operator, used the mobile phone numbers of others to forcibly send short messages such as scams and advertisement sales to the user's mobile phone.

Summary of the invention

In view of the above problems, this application proposes a pseudo base station identification method, device, mobile terminal, and storage medium to achieve the improvement of the above problems.

In the first aspect, the present application provides a pseudo base station identification method, which is applied to a mobile terminal. The method includes: determining a target base station; sending a registration request to the target base station to register with a mobile communication network; detecting whether the registration is successful ; If it is detected that the registration request fails, the target base station is determined to be a pseudo base station.

In a second aspect, the present application provides a pseudo base station identification device, which runs on a mobile terminal, and the device includes: a base station determination unit for determining a target base station; and a registration unit for sending registration to the target base station to mobile communication A registration request of the network; a registration detection unit, used to detect whether the registration is successful; a pseudo base station identification unit, used to determine that the target base station is a pseudo base station if the registration request fails.

In a third aspect, the present application provides a mobile terminal, including one or more processors and a memory; one or more programs are stored in the memory and configured to be executed by the one or more processors, The one or more programs are configured to perform the above method.

According to a fourth aspect, a computer-readable storage medium provided by the present application, in which a program code is stored, wherein the above method is executed when the program code is run.

A pseudo base station identification method, device, mobile terminal and storage medium provided by this application, after determining a target base station, send a registration request to the target base station to register to a mobile communication network, and start to detect whether the registration is successful; if Detecting that the registration request fails, it is determined that the target base station is a pseudo base station. Therefore, whether the target base station is a pseudo base station is determined by detecting whether the registration request sent to the target base station to register to the mobile communication network is successful, thereby improving the security of the mobile terminal and reducing the probability of information leakage of the mobile terminal.

BRIEF DESCRIPTION

In order to more clearly explain the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without paying any creative work, other drawings can be obtained based on these drawings.

FIG. 1 shows a schematic diagram of a system architecture of a mobile communication network system;

2 shows a schematic diagram of a system architecture of another mobile communication network system;

FIG. 3 shows a flowchart of a method for identifying a pseudo base station according to an embodiment of the present application;

4 shows a flowchart of a method for identifying a pseudo base station according to another embodiment of the present application;

FIG. 5 shows a flowchart of a method for identifying a pseudo base station according to another embodiment of the present application;

FIG. 6 shows a structural block diagram of a pseudo base station identification device according to an embodiment of the present application;

7 shows a structural block diagram of a pseudo base station identification device according to another embodiment of the present application;

FIG. 8 shows a structural block diagram of a pseudo base station identification device according to another embodiment of the present application;

9 shows a structural block diagram of a mobile terminal proposed in this application;

10 is a storage unit for storing or carrying a program code for implementing a method for identifying a pseudo base station according to an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

With the development of mobile communication technology, mobile communication has experienced the development of multiple versions such as 2G, 3G and 4G. Whether it is the GSM (Global System for Mobile Communication) mobile communication system or the CDMA (Code Division Multiple Access) communication system in the early 2G era, or the LTE (Long Term Evolution) system architecture in the later 4G era, base stations are more important A communication device.

For example, a schematic diagram of the architecture of the 2G mobile communication system shown in FIG. 1. BTS base station 99 (Base Station) as an access device for mobile communication is connected to the base station controller 98, and then the base station controller 98 is connected to the mobile switching center 97, and the mobile switching center 97 will also be connected to the public switched telephone network 96 other connections. Another example is the schematic diagram of the architecture of the 4G mobile communication system shown in FIG. 2. The eNB base station 95 is connected to an MME (Mobility Management Entity), that is, a mobile management node 94, and the MME is connected to a serving gateway 93, which is then connected to a packet data gateway 92, and the packet data gateway 92 is connected to a packet data network 91. It can be seen from FIGS. 1 and 2 that in the mobile communication system, the base station, as a device that directly establishes a connection with the mobile terminal, has a relatively important position in the entire system architecture. A base station generally refers to a "public mobile communication base station", and its role is mainly used to provide signals to mobile terminals such as mobile phones and tablet computers. With the development of communication technology, the inventor discovered that pseudo base stations appeared.

The pseudo base station is a fake base station. The device is generally composed of a host computer and a laptop computer. Through the SMS group sender, SMS sender and other related devices, it can retrieve the mobile phone card information centered on it and within a certain radius, using the defects of 2G mobile communication , By disguising as the operator's base station, using the mobile phone number of others to forcibly send short messages such as fraud and advertising to the user's mobile phone.

When the pseudo base station device is running, the wireless signal sent by the mobile terminal is forced to connect to the device, resulting in the mobile terminal not being able to use the services provided by the operator normally. The mobile terminal will temporarily go offline for 8 to 12 seconds and return to normal. Some mobile terminals Then you must switch on and off to reconnect to the network. In addition, it will cause mobile terminal users to frequently update their locations, making the wireless network resources in this area tight and causing network congestion, affecting the user's normal communication.

Therefore, the inventor proposes that in this application, the security of the information of the mobile terminal can be improved, and the method, device, mobile terminal, and storage medium for identifying the pseudo base station accessing the pseudo base station can be reduced.

The embodiments of the present application will be described in detail below with reference to the drawings.

Referring to FIG. 3, a pseudo base station identification method provided by an embodiment of the present application is applied to a mobile terminal, and the method includes:

Step S110: Determine the target base station.

Among them, the mobile terminal can determine the target base station in multiple stages.

It can be understood that after the mobile terminal is turned on, or after switching from the flight mode to the online mode, the cell search will be started. During the cell search process, several center frequencies of the cell where a mobile network (such as an LTE network) may exist Receive data at the point and calculate the bandwidth RSSI to determine whether there may be a cell around this frequency point based on the received signal strength. If the mobile terminal can save the frequency point and operator information at the last power-off, it may be the first time after the power-on. Try to camp on the camped cell; if there is no a priori information, it is likely to search the full frequency point, find the frequency point with stronger signal, and then try to camp.

Cell reselection refers to the process in which the mobile terminal selects a best cell to provide a service signal by monitoring the signal quality of the neighboring cell and the current cell in the idle mode. When the signal quality and level of the neighboring cell meet the S criterion and a certain reselection decision criterion, the terminal will access the cell and camp. After the mobile terminal has successfully camped, it will continue to carry out its own cell measurement. The RRC layer calculates Srxlev (S criterion) based on the RSRP measurement results, and compares it with Sintrasearch (start threshold for co-frequency measurement) and Snonintrasearch (start threshold for inter-frequency / different system measurement) as a decision condition for whether to start neighboring zone measurement.

Based on the above situation, as a way, the mobile terminal may use the base station obtained in the cell reselection phase as the target base station. As another way, the mobile terminal may use the base station obtained in the cell search phase as the target base station.

Step S120: Send a registration request for registration to the mobile communication network to the target base station.

It should be noted that a mobile communication network usually includes three major components: an access network, a bearer network, and a core network. Among them, the access network is the "window", responsible for receiving the data; the bearer network is the "truck", responsible for sending the data; the core network is the "management center", which is responsible for managing these data and dividing the data Pick and tell it where to go.

Generally, the network air interface in the access network is used to implement information interaction between the mobile terminal and the base station of the mobile communication network, and the information on the network air interface is carried by various logical channels. Among them, logical channels are divided into two major categories: traffic channels (TCH, Traffic) and control channels (CCH, Control). Among them, TCH mainly transmits services between the network and mobile terminals, such as voice and data; CCH is used For transmitting signaling information and short packet data channels, the broadcast channel (BCH, Broadcast) in CCH is used to transmit information by broadcast, and the broadcast control channel (BCCH, Broadcast) in BCH is used by the base station to Mobile terminals broadcast common information, such as system messages.

After receiving the system message, the mobile terminal can select whether to camp on the cell based on the measurement of the system message. Among them, after the synchronization of the mobile terminal and the base station is successful, it will read the MIB (master information) block information and SIB (system information block) information in the system message, and analyze the sib1 in the SIB information to determine whether the current cell can reside.

The sib1 message can be roughly divided into cell access related information (cellAccessRelatedInfo), cell selection information (cellSelectionInfo), and cell band information (freqBandIndicator). After acquiring the sib message, the mobile terminal pays more attention to cellSelectionInfo. It should be noted that if the mobile terminal wants to successfully camp on a cell, the current cell must meet the S criterion. During the cell selection process, the mobile terminal needs to measure the cell to be selected in order to evaluate the channel quality and determine whether it meets the camping standard. The measurement criterion for cell selection is called S criterion. When the channel quality of a certain cell meets the S criterion, it can be selected as a camping cell.

After the mobile terminal camps in a certain cell, in order to obtain the corresponding mobile communication service through the camped cell, a registration request is sent to the core network through the camped cell. Then, the registration request sent by the mobile terminal to the target base station here essentially expects to register the mobile terminal in the core network. Only when the mobile terminal is registered in the core network can it obtain the corresponding service based on the mobile communication network.

It should be noted that in the foregoing, if there is only one cell under one base station, in this case, the base station refers to the cell, and if there are multiple cells under the base station, then the camped cell refers to the camp Stay at the base station described in the cell.

Step S130: Detect whether the registration is successful.

Step S140: If the registration request fails, the target base station is determined to be a pseudo base station.

Step S150: If it is detected that the registration request fails, it is determined that the target base station is not a pseudo base station.

It can be understood that the pseudo base station is usually based on the communication protocol between the mobile terminal and the base station, and configures some methods that allow the mobile terminal to determine the parameters of the communication protocol that the pseudo base station is more suitable for camping to attract the mobile terminal to connect with the pseudo base station of. And usually the purpose of the pseudo base station to attract the connection of the mobile terminal is to intercept the user information of the mobile terminal, or send some short message to the mobile terminal. And usually the pseudo base station does not have the core network of the mobile terminal.

The core network is a network that connects the service provider with the access network, or connects the access network with other access networks. Usually refers to the part of the network except the access network and the customer premises network. The main function of the core network is to connect the call request or data request sent from the air interface to different networks. Mainly involves the connection of the call, charging, mobility management, supplementary service implementation, intelligent triggering, etc. The main body is supported by the switch. As for softswitch, there are two obvious concepts, the separation of control and bearer, and the separation of control channel and data channel.

Then it can be seen that if the mobile terminal establishes a wireless connection with the base station, if it is desired to implement communication services through the base station, it also needs to be registered with the core network. In general, the pseudo base station is not connected to the core network or does not have all core network functions. It is difficult to determine that the target base station is a pseudo base station when the registration request fails.

A pseudo base station identification method provided by the present application, after determining a target base station, sends a registration request to the target base station to register with a mobile communication network, and begins to detect whether the registration is successful; if the registration request is detected to fail, It is determined that the target base station is a pseudo base station. Therefore, whether the target base station is a pseudo base station is determined by detecting whether the registration request sent to the target base station to register to the mobile communication network is successful, thereby improving the security of the mobile terminal and reducing the probability of information leakage of the mobile terminal.

Referring to FIG. 4, a pseudo base station identification method provided by another embodiment of the present application is applied to a mobile terminal. The method includes:

Step S210: Determine the target base station.

It should be noted that, in this embodiment, the method for determining the target base station may refer to the foregoing content, and details are not described herein again.

Step S220: Send a registration request for registration to the mobile communication network to the target base station.

Step S230: Detect whether the target registration request response information sent by the target base station is received within the target time length after the registration request is sent.

As a method, it is detected whether registration request response information indicating successful registration sent by the target base station is received within a target time length after the registration request is sent. If it is detected that no registration request response information indicating successful registration is received, it is determined that the target registration request response information is not received. If it is detected that the registration request response information indicating successful registration is received, it is determined that the target registration request response information is received.

It can be understood that after the mobile terminal determines to camp on the test base station (or cell), in order to facilitate subsequent communication services, the mobile terminal will register with the core network of the mobile communication network. Then as a way, the mobile terminal may pre-configure a target registration request response information, and if the mobile terminal detects that the response information returned by the base station matches the aforementioned target registration request response information, it may determine that the target registration request response is received information. Among them, the registration request response information indicating successful registration may be used as a target registration request response information. It can be understood that, when both the mobile terminal and the base station follow a pre-negotiated communication protocol, the mobile terminal can determine whether it is a registration request indicating whether the registration is successful or not through the format and content of the received response information. Response information.

As another way, it is detected whether the registration request response message sent by the target base station that meets the target format and indicating that the registration is rejected is received within the target time length after the registration request is sent; if it is detected that the signature is rejected The registered registration request response information determines that the target registration request response information has not been received. If it is detected that the registration request response information indicating that the registration is rejected is received, it is determined that the target registration request response information is received.

It is understandable that even for legal base stations, registration may fail due to some reasons. For example, when registering, the mobile terminal sends a MAR message to the HSS to obtain the authentication set information. After the S-CSCF receives the MAA authentication information returned by the HSS, the S-CSCF reports an error internally, causing the registration process to be interrupted. After research, it is found that in the MAA message returned by HSS, the M-bit of the SIP-Authenticate parameter is "0", and the value of the M-bit is checked according to the 3GPP protocol, and the parameter value is required to be "1". In addition, due to background configuration parameters, signal problems (RSRP <-105dB, SINR <-3dBm), equipment failures (including Mifi, computer, and base station failures), equipment failures (including Mifi, computer, and base station failures), etc. registration failed.

Then, in this case, the mobile terminal may also set the registration request response information that is in accordance with the target format to be rejected for registration as the target registration request response information, if the mobile terminal does not detect the registration that is in the target format and is rejected for registration The request response information determines that the target registration request response information has not been received.

As a way, after receiving the response information, the mobile terminal can compare the received response information with multiple formats in the stored target format list, and if there is a successful comparison, it will determine that a match is detected The response information of the registration request indicating that the target format is rejected for registration.

Step S240: If the target registration request response information is received within the target time length, it is determined that the registration is successful.

Step S250: If the target registration request response information is not received within the target time length, it is determined that the registration has failed.

It can be understood that factors such as the distance and the signal strength between the mobile terminal and the base station will cause different time-consuming information transmission. For example, if the mobile terminal is far away from the base station, relatively speaking, it will take more time to transmit information if the mobile terminal is located closer to the mobile terminal. For another example, in a state with poor signal strength, even the same transmission distance will consume more transmission time. In this case, in order to avoid the influence of the parameters that affect the information transmission rate and the accuracy of the verification of the pseudo base station, as a method, based on the time-consuming calculation of the last successful registration of the mobile terminal to the mobile communication network, The target length of time. It can be understood that if the mobile terminal successfully registers with the mobile communication network through the base station, the base station is characterized as a normal legal base station. The wireless environment at the time when the mobile terminal was last registered with a normal legal base station is similar to the current environment, so the target time length can be calculated based on the time-consuming calculation of the last successful registration of the mobile terminal to the mobile communication network. Reduces the impact of the actual wireless environment on false verification of the pseudo base station.

Optionally, the step of calculating the target time length based on the elapsed time of the last successful registration of the mobile terminal with the mobile communication network includes: acquiring the strength of the wireless signal transmitted by the target base station; The strength is less than the strength threshold, and the time required for the mobile terminal to successfully register with the mobile communication network last time is increased by the correction time to obtain the target time length.

It can be understood that, in order to satisfy the normal communication between the mobile terminal and the base station, the base station needs to maintain a certain signal transmission strength, and correspondingly, the mobile terminal will also maintain a certain reception strength. It can be understood that the strength of the wireless signal received by the mobile terminal when it is broadcast by the base station will vary within a certain range. However, although the strength within this certain range is different, it does not affect the signal transmission between the mobile terminal and the base station. However, if the signal strength is not within this certain range, information may not be successfully transmitted between the mobile terminal and the base station. For example, it will consume more transmission time. In order to avoid the identification error of the pseudo base station caused by this reason, a reference time may be stored to calculate the target time length.

Optionally, the step of calculating the target time length based on the elapsed time of the last successful registration of the mobile terminal with the mobile communication network includes: if it is detected that the strength is not less than the strength threshold, the mobile terminal The time taken to successfully register with the mobile communication network at one time is taken as the target length of time.

Step S260: If the registration request fails, the target base station is determined to be a pseudo base station.

A pseudo base station identification method provided by the present application, after determining a target base station, sends a registration request to the target base station to register to a mobile communication network, and begins to detect whether a target station is received within a target length of time after the registration request is sent The target registration request response information sent by the target base station; if the target registration request response information is not received within the target time length, the target base station is determined to be a pseudo base station. Therefore, whether the target base station is a pseudo base station is determined by detecting the target registration request response information, thereby improving the security of the mobile terminal and reducing the probability of information leakage of the mobile terminal.

Referring to FIG. 5, a pseudo base station identification method provided by yet another embodiment of the present application is applied to a mobile terminal, and the method includes:

Step S310: Determine the target base station.

Step S320: Send a registration request for registration to the mobile communication network to the target base station.

Step S330: Detect the connection status of the RRC connection established with the target base station in the process of sending the registration request.

Step S340: If it is detected that the connection status is a connection release before detecting that the registration is successful, it is determined that the registration fails.

As a way, if the connection status is detected as releasing the connection before the registration is detected successfully, the step of determining the registration failure includes: if it is detected that the target registration request response information is not received, and the The connection status is to release the connection, and it is determined that the registration has failed.

Step S350: If the registration request fails, the target base station is determined to be a pseudo base station.

Step S360: If the connection status is always the connection status before detecting that the registration is successful.

As a way, before the step of determining that the target base station is a pseudo base station, the method further includes: acquiring the RRC connection release message returned by the target base station during the release of the RRC connection; if the RRC connection release message is identified The redirection information meets the target condition, and the target base station is determined to be a pseudo base station.

Optionally, the target condition includes: the target base station is a 4G base station, and the redirection frequency band in the redirection information belongs to a 2G frequency band.

Optionally, the target condition further includes: the cell to which the redirection in the redirection information belongs belongs to a cell detected as a pseudo base station cell in advance.

A pseudo base station identification method provided by the present application, after determining a target base station, sends a registration request to the target base station for registration to a mobile communication network, and starts to detect the establishment of the target base station in the process of sending the registration request If the connection status of the RRC connection is detected before the registration is successful, the connection status is detected as a connection release, the registration fails, and then the target base station is determined to be a pseudo base station. Therefore, whether the target base station is a pseudo base station is determined by detecting the connection status of the RRC connection during the registration request to the mobile communication network sent to the target base station, thereby improving the security of the mobile terminal and reducing the mobile terminal The probability of information leakage.

Referring to FIG. 6, a pseudo base station identification device 400 provided by an embodiment of the present application runs on a mobile terminal. The device 400 includes: a base station determination unit 410, a registration unit 420, a registration detection unit 430, and a pseudo base station identification unit 440.

The base station determining unit 410 is used to determine the target base station.

As a way, the base station determining unit 410 uses the base station obtained by cell reselection as the target base station. As another way, the base station determining unit 410 uses the base station obtained by the cell search as the target base station.

The registration unit 420 is configured to send a registration request for registration to the mobile communication network to the target base station.

The registration detection unit 430 is used to detect whether the registration is successful.

The pseudo base station identification unit 440 is configured to determine that the target base station is a pseudo base station if the registration request fails.

A pseudo base station identification device provided by the present application, after determining a target base station, sends a registration request to the target base station to register with a mobile communication network, and starts to detect whether the registration is successful; if it is detected that the registration request fails, It is determined that the target base station is a pseudo base station. Therefore, whether the target base station is a pseudo base station is determined by detecting whether the registration request sent to the target base station to register to the mobile communication network is successful, thereby improving the security of the mobile terminal and reducing the probability of information leakage of the mobile terminal.

Referring to FIG. 7, a pseudo base station identification device 500 provided by yet another embodiment of the present application runs on a mobile terminal, and the device 500 includes: a base station determination unit 510, a registration unit 520, a response information detection unit 530, and a pseudo base station identification Unit 540 and duration calculation unit 550.

The base station determining unit 510 is used to determine the target base station.

The registration unit 520 is configured to send a registration request for registration to the mobile communication network to the target base station.

The response information detection unit 530 is configured to detect whether the target registration request response information sent by the target base station is received within the target time length after the registration request is sent.

As a way, the response information detection unit 530 is specifically configured to detect whether a registration request response message indicating successful registration sent by the target base station is received within the target time length after the registration request is sent; if the detection is not received The registration request response information indicating successful registration determines that the target registration request response information has not been received. If it is detected that the registration request response information indicating successful registration is received, it is determined that the target registration request response information is received.

As another way, the response information detection unit 530 is specifically configured to detect whether within the target time length after the registration request is sent, whether the registration request response information sent by the target base station that conforms to the target format and that the registration is refused is received ; If it is detected that no registration request response information indicating that registration is rejected is received, it is determined that the target registration request response information is not received. If it is detected that the registration request response information indicating that the registration is rejected is received, it is determined that the target registration request response information is received.

The pseudo base station identification unit 540 is configured to determine that the registration is successful if the target registration request response information is received within the target time length.

The pseudo base station identification unit 540 is configured to determine that the registration fails if the target registration request response information is not received within the target time length.

As a way, the device 500 further includes:

The duration calculation unit 550 is configured to calculate the target duration based on the elapsed time of the last successful registration of the mobile terminal to the mobile communication network.

Optionally, the duration calculation unit 550 is specifically configured to obtain the strength of the wireless signal transmitted by the target base station; if it is detected that the strength is less than the strength threshold, the consumption of the last successful registration of the mobile terminal to the mobile communication network Increase the correction time to obtain the target time length.

Optionally, the duration calculation unit 550 is specifically configured to, if it is detected that the strength is not less than the strength threshold, take the time of the last successful registration of the mobile terminal to the mobile communication network as the target length of time.

A pseudo base station identification device provided by the present application, after determining a target base station, sends a registration request to the target base station to register to a mobile communication network, and starts to detect whether a target is received within a target time length after the registration request is sent The target registration request response information sent by the target base station; if the target registration request response information is not received within the target time length, the target base station is determined to be a pseudo base station. Therefore, whether the target base station is a pseudo base station is determined by detecting the target registration request response information, thereby improving the security of the mobile terminal and reducing the probability of information leakage of the mobile terminal.

Referring to FIG. 8, a pseudo base station identification device 600 provided by yet another embodiment of the present application runs on a mobile terminal, and the device 600 includes: a base station determination unit 610, a registration unit 620, a connection detection unit 630, and a pseudo base station identification unit 640.

The base station determining unit 610 is used to determine the target base station.

The registration unit 620 is configured to send a registration request for registration to the mobile communication network to the target base station.

The connection detection unit 630 is configured to detect the connection status of the RRC connection established with the target base station in the process of sending the registration request.

The registration unit 620 is further configured to determine that the registration has failed if it detects that the connection status is a connection release before detecting the successful registration.

The pseudo base station identification unit 640 is configured to determine that the target base station is a pseudo base station if the registration request fails.

As a way, the pseudo base station identification unit 640 is also used to obtain the RRC connection release message returned by the target base station during the release of the RRC connection; if it is identified that the redirection information in the RRC connection release message meets the target condition, It is determined that the target base station is a pseudo base station.

A pseudo base station identification device provided by the present application, after determining a target base station, sends a registration request registered to a mobile communication network to the target base station, and starts to detect the establishment of the target base station with the target base station If the connection status of the RRC connection is detected before the registration is successful, the connection status is detected as a connection release, the registration fails, and then the target base station is determined to be a pseudo base station. Therefore, whether the target base station is a pseudo base station is determined by detecting the connection status of the RRC connection during the registration request to the mobile communication network sent to the target base station, thereby improving the security of the mobile terminal and reducing the mobile terminal The probability of information leakage.

It should be noted that those skilled in the art can clearly understand that for the convenience and conciseness of the description, the specific working processes of the devices and units described above can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here. . In the several embodiments provided in this application, the coupling between the modules may be electrical. In addition, each functional module in each embodiment of the present application may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module. The above integrated modules may be implemented in the form of hardware or software function modules.

In summary, a pseudo base station identification method, device, mobile terminal, and storage medium provided in this application, after determining a target base station, send a registration request to the target base station to a mobile communication network, and start to detect the Whether the registration is successful; if it is detected that the registration request fails, it is determined that the target base station is a pseudo base station. Therefore, whether the target base station is a pseudo base station is determined by detecting whether the registration request sent to the target base station to register to the mobile communication network is successful, thereby improving the security of the mobile terminal and reducing the probability of information leakage of the mobile terminal.

The mobile terminal provided by the present application will be described below with reference to FIG. 9.

Referring to FIG. 9, based on the above pseudo base station identification method and device, another mobile terminal 100 that can perform the foregoing pseudo base station identification method is further provided by embodiments of the present application. The mobile terminal 100 includes one or more processors (only one shown in the figure), a memory 104, and a wireless module 106 coupled to each other. Wherein, the memory 104 stores a program that can execute the content in the foregoing embodiment, and the processor 102 can execute the program stored in the memory 104.

The processor 102 may include one or more processing cores. The processor 102 uses various interfaces and lines to connect various parts of the entire mobile terminal 100, executes or executes instructions, programs, code sets or instruction sets stored in the memory 104, and calls data stored in the memory 104 to execute Various functions and processing data of the mobile terminal 100. Optionally, the processor 102 may adopt at least one of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), programmable logic array (Programmable Logic Array, PLA) Various hardware forms. The processor 102 may integrate one or a combination of one of a central processing unit (Central Processing Unit, CPU), an image processing unit (Graphics Processing Unit, GPU), and a modem. Among them, CPU mainly deals with operating system, user interface and application program, etc .; GPU is used for rendering and rendering of display content; modem is used for handling wireless communication. It can be understood that the above-mentioned modem may not be integrated into the processor 102, and may be implemented by a communication chip alone.

The memory 104 may include random access memory (RAM) or read-only memory (Read-Only Memory). The memory 104 may be used to store instructions, programs, codes, code sets, or instruction sets. The memory 104 may include a storage program area and a storage data area, where the storage program area may store instructions for implementing an operating system and instructions for implementing at least one function (such as a touch function, a sound playback function, an image playback function, etc.) , Instructions for implementing the following method embodiments. The storage data area may also store data created by the terminal 100 in use (such as a phone book, audio and video data, and chat history data).

The wireless module 106 is used to receive and send electromagnetic waves to realize the mutual conversion of electromagnetic waves and electrical signals, so as to communicate with a communication network or other devices, such as audio playback devices. The wireless module 106 may include various existing circuit elements for performing these functions, for example, an antenna, a radio frequency transceiver, a digital signal processor, an encryption / decryption chip, a subscriber identity module (SIM) card, a memory, etc. . The wireless module 106 can communicate with various networks such as the Internet, intranet, wireless network, or communicate with other devices through the wireless network. The aforementioned wireless network may include a cellular telephone network, a wireless local area network, or a metropolitan area network. For example, the wireless module 106 can exchange information with the base station.

Please refer to FIG. 10, which shows a structural block diagram of a computer-readable storage medium provided by an embodiment of the present application. The computer readable medium 800 stores program codes, and the program codes can be called by a processor to execute the method described in the above method embodiments.

The computer-readable storage medium 800 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read Only Memory), EPROM, hard disk, or ROM. Optionally, the computer-readable storage medium 800 includes a non-transitory computer-readable storage medium. The computer-readable storage medium 800 has a storage space for the program code 810 that performs any of the method steps described above. These program codes can be read from or written into one or more computer program products. The program code 810 may be compressed in an appropriate form, for example.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still Modifications to the technical solutions described in the foregoing embodiments, or equivalent replacements to some of the technical features; and these modifications or replacements do not drive the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

A pseudo base station identification method, which is characterized in that it is applied to a mobile terminal, the method includes:

Determine the target base station;

Send a registration request for registration to the mobile communication network to the target base station;

Detect whether the registration is successful;

If it is detected that the registration request fails, it is determined that the target base station is a pseudo base station.
The method according to claim 1, wherein the step of detecting whether the registration is successful includes:

Detecting whether the target registration request response information sent by the target base station is received within the target time length after the registration request is sent;

If the target registration request response information is not received within the target time length, it is determined that the registration has failed.
The method according to claim 2, wherein the step of detecting whether the target registration request response information sent by the target base station is received within a target time length after the registration request is sent includes:

Detecting, within the target time length after the registration request is sent, whether a registration request response message indicating successful registration sent by the target base station is received;

If it is detected that no registration request response information indicating successful registration is received, it is determined that the target registration request response information is not received.
The method according to claim 2, wherein the step of detecting whether the target registration request response information sent by the target base station is received within a target length of time after the registration request is sent comprises:

Detecting, within the target time length after the registration request is sent, whether a registration request response message sent by the target base station that conforms to the target format and that the registration is rejected is received;

If it is detected that the registration request response information indicating that the registration is rejected is not received, it is determined that the target registration request response information is not received.
The method according to any one of claims 2-4, wherein the method further comprises:

The target time length is calculated based on the elapsed time of the last successful registration of the mobile terminal to the mobile communication network.
The method according to claim 5, wherein the step of calculating the target time length based on the elapsed time of the last successful registration of the mobile terminal with the mobile communication network includes:

Obtaining the strength of the wireless signal transmitted by the target base station;

If it is detected that the strength is less than the strength threshold, the time required for the mobile terminal to successfully register with the mobile communication network last time is increased by the correction time to obtain the target time length.
The method according to claim 5, wherein the step of calculating the target time length based on the elapsed time of the last successful registration of the mobile terminal to the mobile communication network includes:

If it is detected that the strength is not less than the strength threshold, the time duration of the last successful registration of the mobile terminal with the mobile communication network is taken as the target time length.
The method according to claim 1, wherein the step of detecting whether the registration is successful includes:

Detecting the connection status of the RRC connection established with the target base station in the process of sending the registration request;

If before detecting that the registration is successful, the connection status is detected as releasing the connection, it is determined that the registration has failed.
The method according to claim 8, wherein the step of determining that the registration fails includes detecting that the connection status is a connection release before detecting the successful registration.

If it is detected that the target registration request response information is not received, and the connection status is to release the connection, it is determined that the registration has failed.
The method according to claim 8 or 9, wherein the step of determining that the target base station is a pseudo base station further comprises:

In the process of obtaining the release of the RRC connection, the RRC connection release message returned by the target base station;

If it is recognized that the redirection information in the RRC connection release message meets the target condition, the target base station is determined to be a pseudo base station.
The method of claim 10, wherein the target condition comprises:

The target base station is a 4G base station, and the redirection frequency band in the redirection information belongs to a 2G frequency band.
The method according to claim 11, wherein the target condition further comprises:

The redirected cell in the redirection information belongs to a cell detected in advance as a pseudo base station cell.
The method according to any one of claims 1-12, wherein the step of determining the target base station comprises:

Use the base station obtained by cell reselection as the target base station.
The method according to any one of claims 1-13, wherein the step of determining the target base station comprises:

The base station obtained by the cell search is used as the target base station.
A pseudo base station identification device, characterized in that it runs on a mobile terminal, the device includes:

The base station determining unit is used to determine the target base station;

A registration unit, configured to send a registration request for registration to the mobile communication network to the target base station;

A registration detection unit for detecting whether the registration is successful;

The pseudo base station identification unit is configured to determine that the target base station is a pseudo base station if the registration request fails.
The apparatus according to claim 15, wherein the registration detection unit is specifically configured to detect whether the target registration request response information sent by the target base station is received within a target time length after the registration request is sent; if If the target registration request response information is not received within the target time length, it is determined that the registration has failed.
The apparatus according to claim 16, wherein the registration detection unit is specifically configured to detect whether a registration request sent by the target base station indicating successful registration is received within a target length of time after the registration request is sent Response information; if it is detected that no registration request response information indicating successful registration is received, it is determined that the target registration request response information is not received.
The apparatus according to claim 15, wherein the registration detection unit is specifically configured to detect the connection status of the RRC connection established with the target base station in the process of sending the registration request; if the Before the registration is successful, it is detected that the connection status is to release the connection, and it is determined that the registration fails.
A mobile terminal is characterized by comprising one or more processors and memory;

One or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs are configured to perform the method of any one of claims 1-14.
A computer-readable storage medium, characterized in that program code is stored in the computer-readable storage medium, wherein the method according to any one of claims 1-14 is executed when the program code runs.