WO2020113522A1 - Pseudo base station identification method, device, mobile terminal and storage medium - Google Patents

Abstract

The present application discloses a pseudo base station identification method, device, a mobile terminal and a storage medium, which are applied to a mobile terminal, the method comprises: when it is needed to redirect to a second cell of a second base station from a first cell of a first base station, acquiring the current signal strength of a third cell accessed by the mobile terminal before accessing the first cell; determining whether the current signal strength meets a specified condition; if meeting the specified condition, initiating the tracking area update to the first cell; if the tracking area update fails, identifying the first base station as a pseudo base station. This method can accurately identify pseudo base station.

Description

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

The present application relates to the technical field of electronic equipment, and more specifically, to a method, device, mobile terminal, and storage medium for identifying a pseudo base station.

Background technique

Mobile terminals, such as mobile phones and tablet computers, have become one of the most commonly used consumer electronic products in people’s daily lives. People are more and more accustomed to performing various life-related operations through mobile terminals. Mobile terminals usually require operators The base station communicates. In some prosperous commercial areas, fake base stations disguised as operator base stations are often set up, because these fake base stations often impersonate other people’s mobile phone numbers and forcefully send spam messages such as fraud and advertising to the terminal, so in order to protect the data security of the terminal It is necessary to identify these pseudo base stations that cause trouble to people's lives.

Summary of the invention

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

In a first aspect, an embodiment of the present application provides a method for identifying a pseudo base station, which is applied to a mobile terminal. The method includes: when redirecting from a first cell of a first base station to a second cell of a second base station is required, Obtain the current signal strength of the third cell accessed by the mobile terminal before accessing the first cell; determine whether the current signal strength meets a specified condition; if the specified condition is met, initiate tracking to the first cell Area update; if the tracking area update fails, the first base station is identified as a pseudo base station.

In a second aspect, an embodiment of the present application provides a pseudo base station identification device, which is applied to a mobile terminal. The device includes: a signal acquisition module, a signal judgment module, a tracking area tracking new module, and a determination module, wherein the signal The obtaining module is used to obtain the current signal strength of the third cell that the mobile terminal accesses before accessing the first cell when the first cell of the first base station needs to be redirected to the second cell of the second base station The signal judgment module is used to judge whether the current signal strength meets a specified condition; the tracking area and new module are used to initiate a tracking area update to the first cell if the specified condition is met; the determination module uses If the tracking area update fails, the first base station is identified as a pseudo base station.

In a third aspect, an embodiment of the present application provides an electronic device, including: one or more processors; a memory; one or more application programs, wherein the one or more application programs are stored in the memory and Is configured to be executed by the one or more processors, and the one or more programs are configured to perform the method for identifying a pseudo base station provided in the first aspect described above.

According to a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a program code, and the program code can be called by a processor to execute the pseudo provided by the first aspect Base station identification method.

The solution provided in this application is to determine the current signal strength of the third cell that the mobile terminal accesses before accessing the first cell when it needs to be redirected from the cell of the first base station to the second cell of the second base station Whether the current signal strength meets the specified condition, if the specified condition is met, the tracking area update is initiated to the first cell, and if the tracking area update fails, the first base station can be identified as a pseudo base station, so that the pseudo base station can be accurately identified , To avoid troubles caused by pseudo base stations to users.

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 provided by an embodiment of the present application.

FIG. 2 shows a schematic diagram of a system architecture of another mobile communication network provided by an embodiment of the present application.

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

FIG. 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 step S220 in the method for identifying a pseudo base station according to an embodiment of the present application.

FIG. 6 shows another flowchart of step S220 in the method for identifying a pseudo base station according to an embodiment of the present application.

FIG. 7 shows a flowchart of step S250 in the method for identifying a pseudo base station according to an embodiment of the present application.

FIG. 8 shows a flowchart of a method for identifying a pseudo base station according to yet another embodiment of the present application.

FIG. 9 shows a block diagram of a pseudo base station identification device according to an embodiment of the present application.

FIG. 10 shows a block diagram of signal judgment in a device for identifying a pseudo base station according to an embodiment of the present application.

FIG. 11 shows another block diagram of signal judgment in a device for identifying a pseudo base station according to an embodiment of the present application.

12 is a block diagram of a mobile terminal for performing a method for identifying a pseudo base station according to an embodiment of the present application.

13 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

In order to enable those skilled in the art to better understand the solution of the present application, 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.

With the rapid 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, the base station is A more important communication device.

For example, a schematic diagram of the architecture of the 2G mobile communication system shown in FIG. 1. The base station BTS (base transceiver) is used as the access device of the mobile communication channel to connect with the BSC (Base Station Controller), and then the BSC is connected with the MSC (mobile switching center). Another example is the schematic diagram of the 4G mobile communication system architecture shown in FIG. 2. The base station eNB (evolved node B) is connected to the MME (Mobility Management Entity), and the MME is connected to the serving gateway Serving Gateway. 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. Base station facilities are not only in the hands of major operators and equipment manufacturers, they can often be seen in major universities, research institutes, and scientific research institutions, which accelerates the frequency of communication technology updates and shortens the commercial development. The transition time, therefore, and with the development of communication technology, the inventor discovered that a pseudo base station appeared.

The fake base station uses the signal strength, location area, system message and other parameters to fake the mobile communication network of the existing network to trick the user to access within its coverage area to obtain the user's IMSI (International Mobile Subscriber Identification Number). , IMEI (International Mobile Identity, International Mobile Equipment Identity) and other information. The criminals can use the pseudo base station to collect user information, and also use the pseudo base station to maliciously send junk advertisements, fraud and other short messages or make harassing calls, which seriously affects the normal communication of users.

At present, low-standard mobile communication technologies, such as 2G (2-Generation wireless telephone technology, second-generation mobile communication technology), 3G (3rd-Generation, third-generation mobile communication technology), etc., do authentication and protection of the network. The poor results in criminals often carrying out illegal activities through 2G pseudo base stations and 3G pseudo base stations, especially using 2G pseudo base stations to maliciously send junk advertisements, fraud and other short messages. The high-standard communication technology may specifically be an LTE network standard, such as 4G (the 4th Generation, mobile communication technology), 4G+, and 5G (5th-Generation, fifth generation mobile communication technology). The authentication and protection of the network are better, so it is generally considered safe under high-standard communication networks. Therefore, the low-standard mobile communication technology has a relatively low security level compared with the high-standard mobile communication technology, and it is easier for criminals to use the pseudo-base station of the low-standard mobile communication network to realize their illegal activities.

After long-term research, the inventor found that criminals often increase the transmission power of the pseudo base station of the high-standard mobile communication network to enable mobile terminals to access the high-standard mobile communication network and redirect to the pseudo-base station of the low-standard mobile communication network. To achieve illegal activities. Based on the above problems, the inventor proposes a pseudo base station identification method, device, mobile terminal, and storage medium provided by embodiments of the present application. By redirecting from the cell of the first base station to the cell of the second base station, the mobile terminal The current signal strength of the third cell that was accessed before accessing the first cell. If the current signal strength meets the specified conditions, a tracking area update is initiated to the first cell. If the tracking area update fails, the first base station is identified as a pseudo base station, thereby Realize accurate identification of pseudo base stations.

The method for identifying the pseudo base station according to the embodiment of the present application will be described in detail below.

Referring to FIG. 3, an embodiment of the present application provides a method for identifying a pseudo base station, which can be applied to a mobile terminal. The method for identifying a pseudo base station may include:

Step S110: When it is necessary to redirect from the first cell of the first base station to the second cell of the second base station, obtain the current signal strength of the third cell that the mobile terminal accesses before accessing the first cell.

In the embodiment of the present application, since most of the pseudo base stations need to direct the mobile terminal to the pseudo base station of the low-standard mobile communication technology, the low-standard mobile communication technology may be 2G or 3G, so as to achieve illegal behavior. Therefore, it is possible to detect the cell redirection of the base station during the use of the mobile terminal to determine the situation where cell redirection is required, and to perform further confirmation when the cell is redirected to determine the cell of the pseudo base station Redirect. Among them, the cell refers to the area covered by the base station in the mobile communication system, and the mobile terminal can reliably communicate with the base station through the wireless channel in the cell.

When the cell currently accessed by the mobile terminal is the first cell of the first base station, the first base station may establish an RRC (Radio Resource Control, unlimited resource control) connection with the mobile terminal. Among them, the control plane between UE (User Equipment) and eNodeB (Evolved Node-B) includes the first layer, the second layer, and the third layer. The first layer is the physical layer, and the second layer is the media access control layer. The third The layer is RRC. RRC is used to handle layer 3 information of the control plane between UE (User Equipment) and eNodeB (Evolved Node-B), RRC allocates wireless resources and sends related signaling, UE and UTRAN (Evolved Universal Terrestrial Radio Access Access Network) The main part of the inter-control signaling is the RRC message. The RRC message carries all the parameters needed to establish, modify, and release the media access control layer and physical layer protocol entities. It also carries some NAS (non-access layer) messages. make.

Among them, RRC processes the layer 3 information of the control plane between the terminal and the base station, RRC allocates radio resources and sends related signaling. The RRC connection establishment process between the first base station and the mobile terminal includes several steps of reselection of available cells, access admission control, and establishment of a layer 2 signal link.

In some embodiments, the first cell of the first base station may issue a redirection instruction to the mobile terminal. When receiving the redirection command issued by the first cell of the first base station, the mobile terminal may determine The first cell of a base station is redirected to the second cell of a second base station, and the second base station is the target base station to which to redirect. Wherein, the first cell of the first base station may issue the redirection instruction through the above-mentioned RRC connection. Of course, the mobile terminal needs to be redirected from the first cell of the first base station to the second cell of the second base station, or when the location of the mobile terminal changes, or due to fluctuations in the wireless environment (ie, signal strength and interference level Changes) while actively performing the redirection of the cell.

The criminals usually attract the mobile terminal to access the cell of the pseudo base station by increasing the transmission power of the pseudo base station. Therefore, it is possible to determine whether the current redirection is performed after the mobile terminal is attracted to the pseudo base station according to the current signal strength of the third cell by detecting the current signal strength of the third cell accessed by the mobile terminal before accessing the first cell Redirection, that is, the pseudo base station of the LTE network is redirected to a 2G pseudo base station or a 3G pseudo base station. The third cell is a cell where the mobile terminal is successfully registered before accessing the first cell.

In the embodiment of the present application, the mobile terminal may query the historical cell record, and the historical cell record may include information about the historical cell that the mobile terminal has switched to, the location at the time of switching, and the time at the time of switching. Of course, the specific content in the historical cell record can be used as a limitation in the embodiments of the present application. The information of the historical cell may include characteristic parameters of the historical cell, for example, location area code (LAC, location code), location area identification (TAI, Tracking Area, Identity), absolute video channel number (EARFCN, eutra, absolute, radio, frequency, channel) number), physical unit identification (PCI, physical identity), cell identity (CID, cell identity), etc.

According to the above historical cell record, information of the third cell that the mobile terminal accesses before accessing the first cell can be obtained. According to the information of the third cell, the current signal strength of the third cell can be detected. As a way, the current signal strength of the third cell can be obtained according to SIB (System Information Blocks) and the information of the third cell. For example, based on the information of the third cell, a power scan can be initiated to obtain SI information of the first cell that needs to be accessed currently. It can be understood that, after initiating power scan, the terminal device will scan information of multiple cells, that is, receive signal strength of multiple cells. Among them, SIB2～11 are carried in the System Information (SI) message, and the mapping of SIB2～11 to SI message is flexibly configured, which is configured by the schedulingInfoList included in SIB1. For the meaning of the specific SI information, please refer to the provisions in 3GPP TS44.018, which will not be repeated here. Of course, the way to obtain the current signal strength of the third cell that the mobile terminal accesses before accessing the first cell may not be limited in the embodiments of the present application.

Step S120: determine whether the current signal strength meets a specified condition.

In the embodiment of the present application, after acquiring the current signal strength of the third cell that the mobile terminal accesses before accessing the first cell, it may be determined whether the current signal strength meets a specified condition. It can be understood that the mobile terminal sets a specified condition as a determination whether the above redirection is a redirection performed after the mobile terminal is attracted to the pseudo base station. Therefore, the designated condition may be a condition characterizing that the current signal strength of the third cell is better. In other words, when the current signal strength of the third cell meets the specified condition, it means that the current signal strength of the third cell is good and meets the conditions of normal use. The above redirection may be performed after the mobile terminal is attracted to the pseudo base station Redirection; when the current signal strength of the third cell does not meet the specified condition, it means that the current signal strength of the third cell is poor and does not meet the conditions of normal use. The above redirection is performed by the normal base station. For example, the specified condition may be a set signal strength value, and by comparing the current signal strength with the set signal strength value, it may be determined whether the specified condition is satisfied. Of course, the specific designation conditions may not be limited in the embodiments of the present application.

Step S130: If the specified condition is met, a tracking area update is initiated to the first cell.

In the embodiment of the present application, when the current signal strength of the third cell meets the specified condition, it means that the current signal strength of the third cell is good and meets the conditions of normal use. The above redirection may cause the mobile terminal to be attracted to the false The redirection performed after the base station, that is, the pseudo base station cell of the high-standard mobile communication network, is redirected to the cell of the 2G base station or the cell of the 3G base station. Of course, the current redirection may also be normal redirection, such as the redirection that occurs when the mobile terminal has just been turned on and the current base station signal is poor. Therefore, the first base station is a suspected pseudo base station, and the first base station may be further detected to determine whether the first base station is a pseudo base station.

Since the cell location area code (TAC) of the pseudo base station will be deliberately set to the same TAC as the operator's base station, the mobile terminal will not initiate a tracking area update (TAU). Among them, the tracking area update in Long Term Evolution (LTE) refers to that when a mobile terminal moves from a cell location area (TA) to another TA, it must relocate on the new TA Register to notify the network to change the location information of the mobile terminal he stored. For example, when the mobile terminal detects a new cell and finds that the TAC of the cell is different from the TAC of the current cell, it initiates TAU. To determine the location of the mobile terminal, the coverage area of the LTE network will be divided into multiple TAs. The TA functions are similar to the 3G location area and routing area. It is the basic unit of location update and paging in the LTE system. TA is identified by TAC. A TA may contain one or more cells, and TAC is broadcast in SIB1 of these cells. TAI is used as the unique identifier of TA during network operation.

During the TAU, security verification processes such as authentication and integrity protection are performed. If the pseudo base station performs TAU, the TAU update fails because it cannot pass the security verification process described above. Therefore, when it is determined that the current signal strength of the third cell meets the specified condition, a tracking area follow-up can be initiated to the first cell of the first base station to determine whether the first base station is a pseudo base station.

It can be understood that, after increasing power to the pseudo base station of the LTE network, the mobile terminal may be attracted to access the pseudo base station of the LTE network, and may be quickly redirected to a more dangerous pseudo base station cell. In addition, since the TAC of the pseudo base station coincides with the TAC of the operator, TAU will not be performed. Therefore, the mobile terminal may perform TAU when it is determined that the first cell of the first base station needs to be redirected to the second cell of the second base station, and the current signal strength of the third cell satisfies the above specified conditions. Whether a base station is a pseudo base station. When the TAU is initiated to the first cell of the first base station, a TAU request may be sent to the first cell of the first base station, where the TAU request is used to instruct the first base station to perform TAU related operations. When the current signal strength does not meet the specified conditions, it indicates that the above redirection is a normal redirection.

Step S140: If the tracking area update fails, the first base station is identified as a pseudo base station.

In the embodiment of the present application, after initiating TAU to the first cell of the first base station, the mobile terminal may receive the tracking area update result returned by the first cell of the first base station. When refusing to update the information, it means that the tracking area failed to update.

Further, when it is determined that the tracking area update fails, the first base station may be identified as a pseudo base station. It is understandable that mobile terminals are often attracted to pseudo base stations of the LTE network with increased power, and access to the pseudo base stations of the LTE network, and the pseudo base stations of the LTE network will redirect the mobile terminal to a more dangerous pseudo base station cell. Therefore, when it is determined that the first cell of the first base station needs to be redirected to the second cell of the second base station, the current signal strength of the third cell accessed by the mobile terminal before accessing the first cell satisfies the specified condition, and the The first cell of a base station cannot update the tracking area, so it can be determined that the first base station is a pseudo base station.

The method for identifying a pseudo base station provided by the embodiment of the present application, because the pseudo base station is identified when the redirection is required, so that the pseudo base station can be identified before the pseudo base station cell is redirected to a more dangerous base station cell , To facilitate subsequent rapid decision-making and avoid user losses. And through the multiple characteristics of the pseudo base station, the pseudo base station is identified, so that the accuracy of identifying the pseudo base station is high.

Referring to FIG. 4, another embodiment of the present application provides a method for identifying a pseudo base station, which can be applied to a mobile terminal. The method for identifying a pseudo base station may include:

Step S200: When it is necessary to redirect from the first cell of the first base station to the second cell of the second base station, determine whether the redirection is a redirection that occurs when a communication network is used for a call.

In the embodiment of the present application, when the cell currently accessed by the mobile terminal is the first cell of the first base station, the first base station may establish an RRC connection with the mobile terminal. When the first base station needs to redirect the mobile terminal from the first cell of the first base station to the second cell of the second base station, it can transmit a redirection instruction to the mobile terminal through an RRC connection. Therefore, as an implementation manner, the mobile terminal determining that the first cell of the first base station needs to be redirected to the second cell of the second base station may include:

Receiving the release information sent by the first cell of the first base station during the release of the radio resource control connection with the mobile terminal; when the release information carries an indication that the mobile terminal needs to be redirected to the second When instructing the second cell of the base station, it is determined that the cell of the first base station needs to be redirected to the second cell of the second base station.

It can be understood that after the first cell of the first base station establishes an RRC (Radio Resource Control) connection with the mobile terminal, it can send the instruction carrying the redirection instruction by releasing the RRC connection of the mobile terminal through control The release information is used to instruct the mobile terminal to redirect from the first cell of the first base station to the second cell of the second base station. Correspondingly, the mobile terminal can receive the release information sent by the first cell of the first base station in the process of releasing the RRC connection. When it is determined that the above-mentioned instruction instruction exists in the received release information, it can be determined that the The first cell of the first base station is redirected to the second cell of the second base station. Therefore, after establishing the RRC connection with the cell of the first base station, by receiving the message sent by the first cell of the first base station during the process of controlling the release of the RRC connection of the mobile terminal, it can be determined that the first cell of the first base station needs to be restarted The case of the second cell directed to the second base station.

Further, since the mobile terminal is attracted by the pseudo base station of the high-standard mobile communication network after increasing the transmission power, and needs to redirect the mobile terminal to the low-standard mobile communication network when accessing the pseudo base station of the high-standard mobile communication network The pseudo base station, where the high-standard mobile communication network may be an LTE network (for example, 4G), and the low-standard mobile communication network may be 2G or 3G. Therefore, before acquiring the current signal strength of the third cell that the mobile terminal accesses before accessing the first cell, to determine whether the above redirection is a redirection performed after the mobile terminal is attracted to the pseudo base station, it can also determine whether it is necessary Whether the redirected second base station is a 2G base station or a 3G base station. Therefore, the method for identifying the pseudo base station may further include:

Determine whether the second base station is a base station of the second generation mobile communication technology or the third generation mobile communication technology; if it is a base station of the second generation mobile communication technology or the third generation mobile communication technology, execute the acquiring the mobile The step of the current signal strength of the third cell that the terminal accesses before accessing the first cell.

In the embodiment of the present application, it can be determined whether the characteristic parameters of the second base station are consistent with the characteristic parameters of the 2G base station or the 3G base station according to the characteristic parameters of the second base station, thereby determining whether the second base station is a 2G base station or a 3G base station. Among them, the characteristic parameters include location area code (LAC, location, area code), location area identification (TAI, Tracking Area, Identity), absolute video channel number (EARFCN, eutra, absolute frequency, channel number), physical unit identification (PCI, physical) cell identity), cell identity (CID, cell identity), etc. Specifically, taking the LAC as an illustration, since the operator allocated the LAC code in the early stage of network construction, a certain number of LACs were allocated in each region. The 2G network stipulates that the LAC uses BCD encoding (binary-coded decimal, Binary-Coded Decimal). The 2G LAC range is hexadecimal [0x1000-0x1999], [0x2000-0x2999], ..., [0x9000-0x9999 ]. In 3G networks, the LAC range of WCDMA and TD-SCDMA is [0xa000-0xffff]. Therefore, it can be determined whether the LAC is within the above-mentioned LAC range according to the LAC of the second base station. When the LAC of the second base station is within the above-mentioned LAC range, it can be determined that the second base station is a 2G base station or a 3G base station. Of course, the manner of specifically determining whether the second base station is a 2G base station or a 3G base station may not be limited in the embodiments of the present application.

In the embodiment of the present application, it may also be determined whether the first base station is a 4G base station, a 4G+ base station, or a 5G base station, to further determine that the above redirection is that the base station cell under the LTE network is redirected to a 2G or 3G base station cell. Similarly, it can be determined whether the first base station is a pseudo base station according to the characteristic parameters of the first base station. For example, it can be determined whether the first base station is a 4G base station according to whether the TAC of the first base station is within the TAC range of the 4G base station. Of course, the manner of specifically determining whether the first base station is a 4G base station, a 4G+ base station, or a 5G base station may not be limited in the embodiments of the present application.

Since the pseudo base station of the high-standard communication network redirects the mobile terminal to the pseudo base station of the low-standard communication network, it is not a redirection that occurs during a voice call made by the communication network. Therefore, before acquiring the current signal strength of the third cell that the mobile terminal accesses before accessing the first cell, it can also be determined whether the above redirection is a redirection that occurs when a communication network is used for a call. The above redirection is the reason The first cell of the first base station is redirected to the second cell of the second base station.

As a way, the redirection that occurs when using the communication network to make a call may include:

Redirection during the call provided by CSFB.

Among them, because the long-term evolution (LTE, LongTerm Evolution) and 2G/3G dual-mode terminal wireless communication is a single wireless mode (Signal-radio mode), therefore, dual-mode or multi-mode with LTE and 2G/3G access capabilities The terminal, when using LTE access, cannot transmit 2G/3G circuit domain service signals. In order to enable the terminal (UE, User Equipment) to access or camp on LTE, it can conduct voice and other circuit domain (CS, Circuit Switched) services, and can perform the ongoing packet domain (PS, Packet) Switch under the LTE access of the UE ) The business is processed correctly and the CSFB technology is produced.

The CSFB process includes three stages: 1) The mobile terminal initiates a call on the LTE network, corresponding to the originator of the phone, namely the calling (MO, Mobile), or receiving a page, corresponding to the recipient of the phone, namely the called ( MT, Mobile Termination); 2) Mobile terminal falls back under the guidance of LTE network and searches for suitable 2G/3G cells, such as GSM cell/WCDMA cell for access; 3) UE reads the GSM cell/WCDMA cell system broadcast message and establishes Voice calls.

The CSFB needs to redirect the mobile terminal to the 2G/3G cell, and the above redirection will be performed when using the CFSB to make a call. Therefore, as an implementation manner, it may be determined whether the mobile terminal initiated a call request within the LTE coverage within the first set time before determining that the above redirection is required. If a call request is initiated, it is determined that the above redirection is a redirection during a call provided by CSFB, and if no call request is initiated, it is determined that the above redirection is not provided by CSFB. Redirection during the call. As another implementation manner, it may be determined whether the mobile terminal has received the paging request within the LTE coverage within the first set time before determining that the redirection is required. If a paging request has been received, it is determined that the above redirection is a redirection during a call provided by CSFB, and if a paging request has not been received, it is determined that the above redirection is not CSFB. Provide redirection during the call. Wherein, the above call request and paging request may be that the service request carries the CSFB indicator parameter. Of course, specifically determining whether the above redirection is a call redirection method provided by circuit domain fallback (CSFB) may not be limited in the embodiments of the present application.

As another way, the redirection that occurs when a communication network is used for a call may include:

Single wireless mode voice call continuity (SRVCC) provides redirection during calls.

Among them, SRVCC refers to the service continuity of voice calls when a single wireless mode terminal switches from a Time Division LongTerm Evolution (TD-LTE) network to UTRAN/GERAN. The SRVCC decision is made on the evolved Node B (eNB) side. When a user requests, the Mobility Management Entity (MME) will integrate its own SRVCC capability information and the UE's SRVCC capability information to obtain Synthesize the SRVCC capability information, and then notify the eNB of the information. The eNB performs handover judgment. Only when both the MME and the UE support the SRVCC capability, the eNB can initiate an SRVCC handover request for the UE.

SRVCC needs to redirect the mobile terminal to the 2G/3G cell. When using SRVCC to make a call, the above redirection will be performed. Therefore, as an implementation manner, it can be determined whether the mobile terminal initiates a call request within the first set time before determining that the above redirection needs to be performed when the EPC completes attachment and wireless bearer. If a call request is initiated, it is determined that the above redirection is a redirection during a call provided by SRVCC, and if no call request is initiated, it is determined that the above redirection is not a redirection during a call provided by SRVCC. As another implementation manner, it may be determined whether the mobile terminal has received the paging request within the first set time before determining that the above redirection needs to be performed when the EPC completes attachment and wireless bearer. If a paging request has been received, it is determined that the above redirection is a redirection during a call provided by SRVCC, and if a paging request has not been received, it is determined that the above redirection is not a redirection during a call provided by SRVCC. Wherein, the above call request and paging request may be the service request carrying the SRVCC indicator parameter. Of course, specifically determining whether the above redirection is a redirection method during a call provided by the SRVCC may not be limited in the embodiments of the present application.

Therefore, it can be determined whether the redirection is a redirection that occurs during a call using a communication network through the above method. Of course, it is determined whether the redirection is a redirection method that occurs during a call using a communication network. In this embodiment of the present application Can not be limited.

In the embodiment of the present application, when the mobile terminal is attracted by the pseudo base station of the LTE network after increasing the transmission power, when accessing the pseudo base station of the LTE network, the pseudo base station cell will be registered. Since the pseudo base station of the LTE network cannot pass the authentication After the security process, the registration cannot be successful, so the pseudo base station of the LTE network usually redirects the mobile terminal to a 2G pseudo base station or a 3G pseudo base station before the registration is successful. Therefore, before determining whether the redirection is a redirection that occurs during a voice call, it can further determine whether the redirection is a redirection by a pseudo base station of the LTE network according to the registration result of the first cell.

As an implementation, before performing the step of determining whether the above redirection is a redirection that occurs during a voice call, the method for identifying the pseudo base station may further include:

Register the first cell of the first base station; when receiving the indication information sent by the first cell to indicate that the mobile terminal needs to be redirected to the second cell of the second base station, determine whether it is received The information representing the success of registering the first cell; if the information representing the success of registering the first cell is not received, perform the step of determining whether the redirection is a redirection that occurs during a voice call.

It can be understood that, when the mobile terminal accesses the first cell of the first base station, the cell of the first base station may be registered. Among them, the cell of the base station needs to perform an initial access process when registering, for example, the above-mentioned RRC connection. After the initial access process, the attach process is required. The attachment process is a necessary process in the registration process. Only after the attachment is successful can subsequent services be performed. During the attaching process, mutual authentication of the mobile terminal and the network is required, and the mobile terminal and the MM (Mobility Management Entity) establish an MM (mobile management) context. The MME establishes a default bearer for the mobile terminal, and the mobile terminal obtains the IP address assigned by the network side. User location registration and temporary identification (S-TMSI) allocation are also required.

After registering the first cell of the first base station, the registration result returned by the first cell may be received. The registration result may be information characterizing the success of registering the first cell, or may be information characterizing the failure of registering the first cell.

In the embodiment of the present application, when receiving the indication information sent by the first cell to indicate that the mobile terminal needs to be redirected to the second cell of the second base station, that is, when it is determined that the second cell needs to be redirected to the second base station In the second cell, it can be judged whether the information indicating the successful registration of the first cell is received.

If, when it is determined that the second cell of the second base station needs to be redirected, it is determined that the information indicative of the successful registration of the first cell is not received, it indicates that the above redirection may be a case where the pseudo base station of the LTE network is not successfully registered Next, redirect the mobile terminal to a 2G pseudo base station or a 3G pseudo base station. At this time, a step of determining whether the above redirection is a redirection that occurs during a voice call may be performed to further determine whether the first base station is a pseudo base station. If it is judged that the information indicative of successful registration of the first cell is received, it indicates that the first base station is a legitimate base station, so the above redirection is a normal redirection. By performing the process of the foregoing embodiment before performing the step of determining whether the redirection is a redirection that occurs during a voice call, the accuracy of the pseudo base station identification can be improved.

As another implementation manner, before performing the step of determining whether the above redirection is a redirection that occurs during a voice call, the method for identifying the pseudo base station may further include:

Register the first cell of the first base station; when acquiring information characterizing the failure to register the first cell, receive the connection process in which the first cell is releasing radio resource control with the mobile terminal The release information sent in; when the release information carries an instruction instruction indicating that the mobile terminal needs to be redirected to the second cell of the second base station, the execution of the judgment whether the redirection is a heavy voice call occurs Directional steps.

It can be understood that, when the mobile terminal accesses the first cell of the first base station, the cell of the first base station may be registered. For the specific registration method, please refer to the content of the above-mentioned embodiments, which will not be repeated here.

After registering the first cell of the first base station, the registration result returned by the first cell may be received. The registration result may be information characterizing the success of registering the first cell, or may be information characterizing the failure of registering the first cell.

When the information indicating the failure to register the first cell is received, and the release information sent by the first cell during the release of the RRC connection with the mobile terminal is received, and the release information indicates that the mobile terminal needs to be redirected to the first The instruction of the second cell of the second base station also indicates that the above redirection may be that the pseudo base station of the LTE network redirects the mobile terminal to the 2G pseudo base station or the 3G pseudo base station in the case of unsuccessful registration. At this time, a step of determining whether the above redirection is a redirection that occurs during a voice call may be performed to further determine whether the first base station is a pseudo base station. If the release information carrying the above instruction instruction is not received, it indicates that the first base station is a legal base station, so the above redirection is a normal redirection. By performing the process of the foregoing embodiment before performing the step of determining whether the redirection is a redirection that occurs during a voice call, the accuracy of the pseudo base station identification can be improved.

Step S210: If the redirection is not a redirection that occurs during a voice call, obtain the current signal strength of a third cell that the mobile terminal accesses before accessing the first cell.

In the embodiment of the present application, obtaining the current signal strength of the third cell that the mobile terminal accesses before accessing the first cell can participate in the content of the previous embodiment, which will not be repeated here.

Step S220: determine whether the current signal strength meets a specified condition.

In the embodiment of the present application, after acquiring the current signal strength of the third cell that the mobile terminal accesses before accessing the first cell, it may be determined whether the current signal strength meets a specified condition to determine the above redirection, Whether it is the redirection after the mobile terminal is attracted to the pseudo base station.

As a way, referring to FIG. 5, step S220 may include:

Step S221: Determine whether the current signal strength is greater than a preset threshold.

Step S222: If the current signal strength is greater than the preset threshold, determine that the current signal strength meets a specified condition.

It is understandable that it can be judged whether the current signal strength is greater than the preset threshold, and if it is judged that it is greater than the preset threshold, it means that the signal strength of the third cell is at a high normal level, that is, the current of the third cell The signal strength is good, which satisfies the conditions of normal use, rather than the third cell's low signal strength resulting in access to the first cell. Therefore, the current signal strength meets the specified conditions, and the above redirection may cause the mobile terminal to be attracted to false Redirection after the base station. If it is determined that it is not greater than the preset threshold, it means that the current signal strength of the third cell is poor, and the mobile terminal accesses the first base station, possibly because the third cell does not meet the conditions for normal communication, so the current signal strength does not meet Specifying the conditions, the above redirection is performed by the normal base station. The specific preset threshold may not be used as a limitation, and may be a signal strength characterizing a situation where the mobile terminal can communicate well. For example, the preset threshold may be 110 dBm, 120 dBm, 125 dBm, and so on.

As a way, referring to FIG. 6, step S220 may include:

Step S223: Determine whether the current signal strength is not lower than the historical signal strength of the third cell when the mobile terminal accesses the third cell.

Step S224: If the current signal strength is not lower than the historical signal strength, it is determined that the specified condition is satisfied.

It can be understood that, when accessing the third cell, the mobile terminal may store the detected signal strength of the third cell as the historical signal strength. When determining whether the current signal strength of the third cell satisfies the specified condition, it may be determined whether the current signal strength is not lower than the historical signal strength. If it is judged that the current signal strength is not lower than the historical signal strength, it means that the current signal strength of the third cell has not deteriorated, that is, it is not that the signal strength of the third cell has become low, resulting in access to the first cell, so the current signal The strength meets the specified condition. The above redirection may be a redirection performed after the mobile terminal is attracted to the pseudo base station. If it is determined that the current signal strength is lower than the historical signal strength, it indicates that the mobile terminal accesses the first base station, possibly because the third cell does not meet the conditions for normal communication. Therefore, the current signal strength does not meet the specified conditions. Redirect to the normal base station.

Step S230: If the specified condition is met, the redirection operation is suspended.

When the first cell of the first base station needs to be redirected to the second cell of the second base station, it is determined that the redirection is a non-call redirection, and it is determined that the current signal strength of the third cell satisfies a specified condition, It means that the current redirection may be a cell of a pseudo base station under the LTE network, and redirect to a more dangerous base station cell.

In the embodiment of the present application, in order to ensure the safety of users and avoid the criminals from redirecting the mobile terminal to the cell of the 2G base station or the cell of the 3G base station to realize their illegal behavior, the current signal strength of the third cell can be determined When the specified conditions are met, the redirection operation is suspended to avoid user losses.

Step S240: Initiate a tracking area update to the first cell.

Since it is determined that the above redirection may be a pseudo base station cell where the mobile terminal accesses the LTE network, the pseudo base station redirects the mobile terminal to a 2G pseudo base station cell or a 3G pseudo base station cell, so the first base station is a suspected pseudo base station. In the embodiment of the present application, the tracking area update may be initiated to the first cell of the first base station to further detect the first base station to determine whether the first base station is a pseudo base station, specifically to the first cell of the first base station For the content of initiating the update of the tracking area, reference may be made to the content of the foregoing embodiment, and details are not described herein again.

Step S250: If the tracking area update fails, the first base station is identified as a pseudo base station.

After the tracking area update request is initiated, the tracking area update result may be determined according to the information returned by the first cell of the first base station. In the embodiment of the present application, referring to FIG. 7, step S240 may include:

Step S251: Receive an update result returned by the first cell of the first base station.

Step S252: When the update result includes the reason value of the update failure, it is determined that the tracking area has failed to track.

It can be understood that, after receiving the tracking area update requested by the mobile terminal, the first cell of the first base station will return the update result. Correspondingly, the mobile terminal may receive the update result returned by the first cell of the first base station. When the tracking area update fails, the update result delivered by the LTE network is usually a tracking area update rejection message, and the tracking area update rejection message usually carries a rejection reason value, and different rejection reason values indicate different rejection reasons. For example, a rejection reason value of #15 indicates that there is no suitable cell in the tracking area. In practical applications, the mobile terminal can parse the tracking area update rejection message to obtain the base station identification and rejection reason value. Therefore, when the received update result is a tracking area update rejection message, and the tracking area update rejection message carries a rejection reason value, it can be determined that the tracking area update failed.

During the TAU, security verification processes such as authentication and integrity protection are performed, and if the pseudo base station performs TAU, the TAU update fails because it cannot pass the security verification process described above. Therefore, when it is determined that the tracking area update fails, the first base station can be identified as a pseudo base station. Understandably, when accessing the pseudo base station of the LTE network, the mobile terminal will quickly redirect to the more dangerous 2G pseudo base station cell or 3G pseudo base station cell without successfully registering the pseudo base station cell, and the mobile terminal connects When entering a pseudo base station cell, TAU will not be performed. Therefore, when it is determined that the first cell of the first base station needs to be redirected to the second cell of the second base station, the current signal strength of the third cell accessed by the mobile terminal before accessing the first cell satisfies the specified condition, and the The first cell of a base station cannot update the tracking area, so it can be determined that the first base station is a pseudo base station.

Step S260: Identify the second base station as a pseudo base station.

In the embodiment of the present application, when it is determined that the first base station is a pseudo base station, it indicates that the above redirection is to redirect to a more dangerous 2G pseudo base station cell or 3G pseudo base station cell when the mobile terminal accesses the pseudo base station of the LTE network. Therefore, it can be determined that the second base station is also a pseudo base station.

Step S270: Access to the cell managed by the first base station and the second base station is prohibited.

In the embodiment of the present application, when it is determined that the first base station and the second base station are pseudo base stations, in order to prevent users from being attacked by criminals, therefore, access to the cells of the first base station and the second base station may be prohibited.

As an implementation manner, a method for prohibiting a mobile terminal from accessing the cells of the first base station and the second base station includes the mobile terminal prohibiting detection of characteristic parameters corresponding to the first base station and the second base station, where the characteristic parameters include a location area identifier ( TAI, Tracking Area, Identity), absolute video channel number (EARFCN, eutra, absolute frequency, channel number), physical unit identification (PCI, physical, cell identity), cell identity (CID, cell identity), etc. Of course, the first base station and the first The characteristic parameters corresponding to the second base station may also include other, which will not be repeated here. In this embodiment, the first base station and the second base station may be identified by the characteristic parameters corresponding to the first base station and the second base station, and the mobile terminal is prohibited from accessing the first base station and the second base station based on the identification.

In the embodiment of the present application, if the first base station and the second base station are directly prohibited completely, although the possibility of the mobile terminal being attacked by the first base station and the second base station can be avoided again, it also completely prohibits the mobile terminal from being subject to security The monitoring and tracking of the monitoring system will also cause bad influence.

In this embodiment, after the mobile terminal is prohibited from accessing the cells of the first base station and the second base station, the mobile terminal may be prohibited from accessing the cells managed by the first base station and the second base station under certain circumstances. Therefore, the method for identifying the pseudo base station may further include:

When the specified condition is satisfied, the prohibition of access to the cells managed by the first base station and the second base station is canceled.

As an implementation manner, when the mobile terminal is prohibited from accessing the cells managed by the first base station and the second base station, the duration of the mobile terminal's access to the first base station and the second base station is prohibited and monitored, and the monitored The method may include real-time monitoring, interval monitoring at predetermined intervals, or monitoring at intervals set by the user. Optionally, in order to improve the accuracy of the monitoring acquisition duration, real-time monitoring may be used. When it is determined that the monitoring duration exceeds the specified duration, the mobile terminal is prohibited from accessing the first base station and the second base station, that is, the mobile terminal is no longer restricted on the first base station and the registered network of the second base station , In order to cooperate with the information required for reporting the security monitoring system. It can be understood that the above method can reduce the attack of the mobile terminal by the pseudo base station, and at the same time, the mobile terminal is not completely prohibited from accessing the pseudo base station to ensure that the mobile terminal is monitored and tracked by the security monitoring system.

Step S280: refuse to camp on the first cell and redirect to other cells except the cell managed by the first base station and the cell managed by the second base station.

In the embodiment of the present application, when the first base station is determined, the mobile terminal can directly refuse to camp on the cell managed by the first base station. In addition, when the first base station is a pseudo base station, the second base station can also be recognized as a pseudo base station Therefore, it can be redirected to other cells except the cell of the first base station and the cell of the second base station, and the effect of preventing camping on the pseudo base station is achieved. For example, according to the cell list, it can be redirected to a cell managed by a Universal Mobile Telecommunications System (UMTS, Universal Telecommunications System) base station that is not managed by the first base station or the second base station, or a cell managed by an LTE base station. It should be noted that the execution order of step S250, step S260, and step S280 may not be limited in the embodiment of the present application.

Step S290: If the tracking area update is successful, continue the redirection operation.

In the embodiment of the present application, after the tracking area update is initiated to the cell of the first base station, if the update is successful, it indicates that the first base station can implement a security verification process such as authentication and integrity protection that can be performed by the normal base station, and it can be determined The first base station is a legal base station. Therefore, the above redirection from the cell of the first base station to the cell of the second base station is a redirection in normal use, for example, when the signal in the LTE network is poor, the redirection is to a 3G or 2G network, so the above redirection operation can be continued To meet the normal use requirements.

The method for identifying a pseudo base station provided in the embodiment of the present application, because when redirection is required, the redirection is judged, and the current signal strength of the third cell accessed before accessing the first cell is also determined, in addition, Perform tracking area update. When the tracking area update fails, the current cell is determined to be a pseudo base station, so that the pseudo base station can be identified before the pseudo base station cell is redirected to a more dangerous base station cell, and the redirect operation is suspended to avoid User losses. And through the multiple characteristics of the pseudo base station, the pseudo base station is identified, so that the accuracy of identifying the pseudo base station is high. In addition, when the pseudo base station is also identified, by prohibiting the pseudo base station, and refusing to reside in the pseudo base station cell and redirecting to another cell, the pseudo base station can prevent the user from attacking and ensure the security of the user.

Referring to FIG. 8, another embodiment of the present application provides a method for identifying a pseudo base station, which can be applied to a mobile terminal. The method may include:

Step S310: when it is necessary to redirect from the first cell of the first base station to the second cell of the second base station, determine whether the redirection is a redirection that occurs when a communication network is used for a call.

Step S320: If the redirection is not a redirection that occurs during a voice call, obtain the current signal strength of a third cell that the mobile terminal accesses before accessing the first cell.

Step S330: Determine whether the current signal strength meets a specified condition.

In the embodiment of the present application, steps S310 to S320 can refer to the content of the previous embodiment, which will not be repeated here.

Step S340: If the specified condition is satisfied, cancel the redirect operation.

It should be noted that, unlike the previous embodiment, when the first cell of the first base station needs to be redirected to the second cell of the second base station, it is determined that the redirection is a non-call redirection, and it is determined When the current signal strength of the third cell satisfies the specified condition, it indicates the current redirection, which may be a cell of a pseudo base station under the LTE network, and redirects to a more dangerous base station cell.

In the embodiments of the present application, in order to ensure the safety of users, it is avoided that criminals realize their illegal behavior by redirecting the mobile terminal to the cell of the 2G base station or the cell of the 3G base station. Therefore, when it is determined that the current signal strength of the third cell satisfies the specified condition, the redirection operation can be cancelled, that is, the redirection operation can no longer be performed, to avoid the cell redirected to the cell of the 2G base station or the cell of the 3G base station. To attack and cause loss of users.

Step S350: Initiate a tracking area update to the first cell.

Step S360: If the tracking area update fails, identify the first base station as a pseudo base station.

Step S370: Identify the second base station as a pseudo base station.

Step S380: Access to the cell managed by the first base station and the second base station is prohibited.

Step S390: Refuse to camp on the first cell and redirect to other cells except the cell managed by the first base station and the cell managed by the second base station.

In the embodiment of the present application, steps S340 to S390 can refer to the content of the previous embodiment, and will not be repeated here.

The method for identifying a pseudo base station provided in the embodiment of the present application, because when redirection is required, the redirection is judged, and the current signal strength of the third cell accessed before accessing the first cell is also determined, in addition, Perform tracking area update. When the tracking area update fails, the current cell is determined to be a pseudo base station, so that the pseudo base station can be identified before the pseudo base station cell is redirected to a more dangerous base station cell, and the redirection operation is canceled to avoid User losses. And through the multiple characteristics of the pseudo base station, the pseudo base station is identified, so that the accuracy of identifying the pseudo base station is high. In addition, when the pseudo base station is also identified, by prohibiting the pseudo base station, and refusing to reside in the pseudo base station cell and redirecting to another cell, the pseudo base station can prevent the user from attacking and ensure the security of the user.

Please refer to FIG. 9, which shows a block diagram of a device 400 for identifying a pseudo base station according to an embodiment of the present application. The pseudo base station identification device 400 is applied to the above mobile terminal. The following describes the device shown in FIG. 9. The pseudo base station identification device 400 includes: a signal acquisition module 410, a signal judgment module 420, a tracking area and a new module 430和 Determination Module 440. Wherein, the signal acquisition module 410 is used to acquire the first cell that the mobile terminal accesses before accessing the first cell when it needs to be redirected from the first cell of the first base station to the second cell of the second base station The current signal strength of three cells; the signal judgment module 420 is used to judge whether the current signal strength meets a specified condition; the tracking area follow-up module 430 is used to initiate tracking to the first cell if the specified condition is met Area update; the determining module 440 is used to identify the first base station as a pseudo base station if the tracking area update fails.

As an implementation manner, referring to FIG. 10, the signal judgment module 420 may include: a first judgment unit 421 and a first result determination unit 422. The first determining unit 421 is used to determine whether the current signal strength is greater than a preset threshold. The first result determining unit 422 is configured to determine that the current signal strength meets a specified condition if the current signal strength is greater than the preset threshold, and determine the if the current signal strength is not greater than the preset threshold The current signal strength does not meet the specified conditions.

As another implementation manner, referring to FIG. 11, the signal judgment module 420 may include: a second judgment unit 423 and a second result determination unit 424. The second judgment unit 423 is used to judge whether the current signal strength is not lower than the historical signal strength of the third cell when the mobile terminal accesses the third cell. The second result determination unit 424 is configured to determine that the specified condition is satisfied if the current signal strength is not lower than the historical signal strength, and determine that the specified condition is not satisfied if the current signal strength is lower than the historical signal strength.

In the embodiment of the present application, the apparatus 400 for identifying a pseudo base station may further include: a redirection suspension module. The redirection pause module is used to pause the redirection operation if the specified condition is met.

Further, the device 400 for identifying a pseudo base station may further include: a redirection execution module. The redirection execution module is used to continue the redirection operation if the tracking area update is successful.

In the embodiment of the present application, the apparatus 400 for identifying a pseudo base station may further include: a redirection cancellation module. The redirection cancellation module is used to cancel the redirection operation if the cell of the first base station has not been successfully registered.

In the embodiment of the present application, the apparatus 400 for identifying a pseudo base station may further include: a redirection judgment module. The redirection determination module is used to determine whether the redirection is a redirection that occurs during a voice call. If the redirection is not a redirection that occurs during a voice call, the signal acquisition module 410 acquires the current signal strength of the third cell that the mobile terminal accessed before accessing the first cell.

As an implementation manner, the pseudo base station identification device 400 may further include: a cell registration module and an information judgment module. The cell registration module is used to register the first cell of the first base station. The information judgment module is used for judging whether the first cell is successfully received when indicating information sent by the first cell indicating that the mobile terminal needs to be redirected to the second cell of the second base station Information. If the information indicative of successful registration of the first cell is not received, the redirection judgment module judges whether the redirection is a redirection that occurred during a voice call.

As another implementation manner, the apparatus 400 for identifying a pseudo base station may further include: a release information receiving module. After the cell registration module registers the first cell of the first base station, the release information receiving module is used to receive the release of the first cell and the Release information sent during the connection of radio resource control between mobile terminals. When the release information carries an instruction instruction indicating that the mobile terminal needs to be redirected to the second cell of the second base station, the redirection determination module determines whether the redirection is a redirection that occurs during a voice call.

In the embodiment of the present application, the redirection that occurs during a voice call includes: redirection during a voice call provided by CSFB; or voice provided by single wireless mode voice call continuity (SRVCC) Redirection during the call.

In the embodiment of the present application, the pseudo base station identification device 400 may further include: a base station judgment module. The base station judgment module is used to judge whether the second base station is a base station of the second generation mobile communication technology or the third generation mobile communication technology. If it is a base station of the second-generation mobile communication technology or the third-generation mobile communication technology, the signal acquisition module 410 acquires the current signal strength of the third cell that the mobile terminal accesses before accessing the first cell.

In the embodiment of the present application, the pseudo base station identification device 400 may further include: a base station identification module. The base station identification module is used to identify the second base station as a pseudo base station.

In the embodiment of the present application, the apparatus 400 for identifying a pseudo base station may further include: a cell barring module. The cell prohibition module is used to prohibit access to the cells managed by the first base station and the second base station.

Further, the cell prohibition module may specifically: prohibit detection of characteristic parameters corresponding to the first base station and the second base station, where the characteristic parameters include location area identifiers, absolute video channel numbers, physical unit identifiers, and cell identifiers. At least one.

In some embodiments, the apparatus 400 for identifying a pseudo base station may further include: a prohibition cancellation module. The prohibition cancellation module is used to cancel prohibition of access to the cell managed by the first base station and the second base station when the set condition is satisfied.

In the embodiment of the present application, the pseudo base station identification device 400 may further include: a rejection module. The rejection module is used to refuse to camp on the first cell and redirect to other cells except the cell managed by the first base station and the cell managed by the second base station.

In the embodiment of the present application, the apparatus 400 for identifying a pseudo base station may further include: an update result receiving module and an update determining module. The update result receiving module is used to receive the update result returned by the first cell of the first base station; the update determination module is used to determine that the tracking area has failed to track when the update result includes the reason value of the update failure.

Those skilled in the art can clearly understand that for the convenience and conciseness of the description, the specific working processes of the above-described device and module can be referred 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, mechanical, or other forms of coupling.

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, the solution provided by the present application obtains the third cell of the third cell accessed by the mobile terminal before accessing the first cell when the cell of the first base station needs to be redirected to the second cell of the second base station The current signal strength to determine whether the current signal strength meets the specified conditions. If the specified conditions are met, the tracking area update is initiated to the first cell. If the tracking area update fails, the first base station can be identified as a pseudo base station, so that Accurately identify the pseudo base station to avoid the trouble caused by the pseudo base station to users.

Please refer to FIG. 12, which shows a structural block diagram of a mobile terminal provided by an embodiment of the present application. The mobile terminal 100 may be a mobile terminal capable of running application programs such as a smart phone, a tablet computer, and an e-book. The mobile terminal 100 in this application may include one or more of the following components: a processor 110, a memory 120, and one or more application programs, where one or more application programs may be stored in the memory 120 and configured to be configured by one Executed by one or more processors 110, and one or more programs are configured to execute the method as described in the foregoing method embodiments.

The processor 110 may include one or more processing cores. The processor 110 connects various parts of the entire mobile terminal 100 using various interfaces and lines, executes or executes instructions, programs, code sets or instruction sets stored in the memory 120, and calls data stored in the memory 120 to execute Various functions and processing data of the mobile terminal 100. Optionally, the processor 110 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 110 may integrate one or a combination 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 110, and may be implemented by a communication chip alone.

The memory 120 may include random access memory (RAM) or read-only memory (Read-Only Memory). The memory 120 may be used to store instructions, programs, codes, code sets, or instruction sets. The memory 120 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).

Please refer to FIG. 13, 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 (20)

1. A method for identifying a pseudo base station is characterized by being applied to a mobile terminal. The method includes:

   When the first cell of the first base station needs to be redirected to the second cell of the second base station, obtain the current signal strength of the third cell that the mobile terminal accesses before accessing the first cell;

   Determine whether the current signal strength meets the specified conditions;

   If the specified condition is met, initiate tracking area update to the first cell;

   If the tracking area update fails, the first base station is identified as a pseudo base station.
2. The method according to claim 1, wherein the judging whether the current signal strength meets a specified condition includes:

   Determine whether the current signal strength is greater than a preset threshold;

   If the current signal strength is greater than the preset threshold, it is determined that the current signal strength meets a specified condition.
3. The method according to claim 1, wherein the judging whether the current signal strength meets a specified condition includes:

   Determine whether the current signal strength is not lower than the historical signal strength of the third cell when the mobile terminal accesses the third cell;

   If the current signal strength is not lower than the historical signal strength, it is determined that the specified condition is satisfied.
4. The method according to claim 1, wherein if the specified condition is satisfied, the method further comprises:

   Suspend the redirected operation.
5. The method according to claim 4, wherein the method further comprises:

   If the tracking area update is successful, the redirection operation is continued.
6. The method according to claim 1, wherein if the specified condition is satisfied, the method further comprises:

   Cancel the redirection operation.
7. The method according to claim 1, wherein before the acquiring the current signal strength of the third cell that the mobile terminal accesses before accessing the first cell, the method further comprises:

   Determine whether the redirection is a redirection that occurs during a voice call;

   If the redirection is not a redirection that occurs during a voice call, the step of acquiring the current signal strength of a third cell that the mobile terminal accesses before accessing the first cell is performed.
8. The method according to claim 7, wherein before the determining whether the redirection is a redirection that occurs during a voice call, the method further includes:

   Register the first cell of the first base station;

   When receiving the indication information sent by the first cell to indicate that the mobile terminal needs to be redirected to the second cell of the second base station, determine whether the information indicative of successful registration of the first cell is received;

   If the information indicative of successful registration of the first cell is not received, the step of determining whether the redirection is a redirection that occurs during a voice call is performed.
9. The method according to claim 7, wherein before the determining whether the redirection is a redirection that occurs during a voice call, the method further includes:

   Register the first cell of the first base station;

   When acquiring information characterizing the failure to register the first cell, receiving the release information sent by the first cell during the process of releasing the radio resource control connection with the mobile terminal;

   When the release information carries an instruction instruction indicating that the mobile terminal needs to be redirected to the second cell of the second base station, the step of determining whether the redirection is a redirection that occurs during a voice call is performed.
10. The method according to claim 7, wherein the redirection that occurs during the voice call includes:

    Redirection during voice calls using circuit domain fallback (CSFB); or

    Single wireless mode voice call continuity (SRVCC) provides redirection during voice calls.
11. The method according to any one of claims 1-10, wherein before the acquiring the current signal strength of the third cell that the mobile terminal accesses before accessing the first cell, the method Also includes:

    Determine whether the second base station is a base station of the second generation mobile communication technology or the third generation mobile communication technology;

    If it is a base station of the second-generation mobile communication technology or the third-generation mobile communication technology, the step of acquiring the current signal strength of the third cell accessed by the mobile terminal before accessing the first cell is performed.
12. The method according to claim 11, wherein after the identification of the first base station as a pseudo base station if the tracking area update fails, the method further comprises:

    Identify the second base station as a pseudo base station.
13. The method according to claim 11, wherein after the identification of the first base station as a pseudo base station if the tracking area update fails, the method further comprises:

    Access to the cells managed by the first base station and the second base station is prohibited.
14. The method according to claim 13, wherein the prohibiting access to the cell managed by the first base station includes:

    It is prohibited to detect characteristic parameters corresponding to the first base station and the second base station, and the characteristic parameters include at least one of a location area identifier, an absolute video channel number, a physical unit identifier, and a cell identifier.
15. The method according to claim 14, wherein the method further comprises:

    When the set condition is satisfied, the access prohibition to the cell managed by the first base station and the second base station is canceled.
16. The method according to any one of claims 1-10, wherein the method further comprises:

    Reject to camp on the first cell and redirect to other cells than the cell managed by the first base station and the cell managed by the second base station.
17. The method according to any one of claims 1-10, characterized in that before the identification of the first base station as a pseudo base station if the tracking area update fails, the method further comprises:

    Receiving an update result returned by the first cell of the first base station;

    When the update result includes the value of the reason for the update failure, it is determined that the tracking in the tracking area has failed.
18. An identification device for a pseudo base station is characterized by being applied to a mobile terminal. The device includes: a signal acquisition module, a signal judgment module, a tracking area tracking new module, and a determination module, wherein,

    The signal acquisition module is used to acquire the third cell that the mobile terminal accesses before accessing the first cell when the first cell of the first base station needs to be redirected to the second cell of the second base station Current signal strength;

    The signal judgment module is used to judge whether the current signal strength meets a specified condition;

    The tracking area follow-up module is used to initiate tracking area update to the first cell if the specified conditions are met;

    The determining module is used to identify the first base station as a pseudo base station if the tracking area update fails.
19. An electronic device, characterized in that it includes:

    One or more processors;

    Memory

    One or more application programs, wherein the one or more application programs are stored in the memory and are configured to be executed by the one or more processors, the one or more programs are configured to execute as The method of any one of claims 1-15.
20. A computer readable storage medium, characterized in that the computer readable storage medium stores program code, and the program code can be called by a processor to execute the method according to any one of claims 1-15 .

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