CN112690011B - Pseudo base station identification method, pseudo base station identification device, mobile terminal and storage medium - Google Patents
Pseudo base station identification method, pseudo base station identification device, mobile terminal and storage medium Download PDFInfo
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- CN112690011B CN112690011B CN201880097435.9A CN201880097435A CN112690011B CN 112690011 B CN112690011 B CN 112690011B CN 201880097435 A CN201880097435 A CN 201880097435A CN 112690011 B CN112690011 B CN 112690011B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/12—Detection or prevention of fraud
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The embodiment of the application discloses a pseudo base station identification method, a pseudo base station identification device, a mobile terminal and a storage medium. The method comprises the following steps: acquiring a frequency point of a wireless signal transmitted by a detected base station; acquiring the bandwidth of the frequency point; judging whether the bandwidth meets a target condition or not; and if the bandwidth meets the target condition, identifying the base station as a pseudo base station. The method judges whether the bandwidth meets a target condition under the condition that the frequency point of the wireless signal transmitted by the detected base station is obtained and the bandwidth of the frequency point is further obtained, and identifies the base station as a pseudo base station if the bandwidth meets the target condition. Therefore, whether the base station is a pseudo base station or not is identified through the bandwidth of the frequency point of the wireless signal sent by the base station, and the safety of the mobile terminal is further improved, so that the probability of information leakage caused by the fact that the mobile terminal is accessed to the pseudo base station is reduced.
Description
Technical Field
The present invention relates to the field of mobile terminal technologies, and in particular, to a method and apparatus for identifying a pseudo base station, a mobile terminal, and a storage medium.
Background
The fake base station is composed of a host and a notebook computer, and can search mobile phone card information in a certain radius range by using the mobile phone card information as a center through a short message mass transmitter, a short message transmitter and other equipment, and can forcibly send short messages such as fraud, advertisement promotion and the like to a user mobile phone by impersonating the mobile phone number of other people by using the mobile communication defect to form a base station of an operator.
Disclosure of Invention
In view of the above, the present application proposes a method, an apparatus, a mobile terminal and a storage medium for identifying a pseudo base station, so as to improve the above problem.
In a first aspect, the present application provides a method for identifying a pseudo base station, which is applied to a mobile terminal, and the method includes: acquiring a frequency point of a wireless signal transmitted by a detected base station; acquiring the bandwidth of the frequency point; judging whether the bandwidth meets a target condition or not; and if the bandwidth meets the target condition, identifying the base station as a pseudo base station.
In a second aspect, the present application provides a pseudo base station identifying apparatus, operating in a mobile terminal, the apparatus comprising: the frequency point information acquisition unit is used for acquiring the frequency point of the wireless signal transmitted by the detected base station; a bandwidth information acquisition unit, configured to acquire a bandwidth of the frequency point; a judging unit, configured to judge whether the bandwidth meets a target condition; and the pseudo base station identification unit is used for identifying the base station as a pseudo base station if the bandwidth meets the target condition.
In a third aspect, the present application provides a mobile terminal comprising 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 configured to perform the methods described above.
In a fourth aspect, the present application provides a computer readable storage medium having program code stored therein, wherein the method described above is performed when the program code is run.
According to the pseudo base station identification method, device, mobile terminal and storage medium, under the condition that the frequency point of a wireless signal transmitted by a detected base station is obtained and the bandwidth of the frequency point is further obtained, whether the bandwidth meets a target condition is judged, and if the bandwidth meets the target condition, the base station is identified as the pseudo base station. Therefore, whether the base station is a pseudo base station or not is identified through the bandwidth of the frequency point of the wireless signal sent by the base station, and further the safety of the mobile terminal is improved, so that the probability of information leakage caused by the fact that the mobile terminal is accessed to the pseudo base station is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a system architecture diagram of a mobile communication network system;
fig. 2 shows a system architecture diagram of another mobile communication network system;
fig. 3 is a flowchart of a pseudo base station identification method according to an embodiment of the present application;
fig. 4 is 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 pseudo base station identification method according to still another embodiment of the present application;
fig. 6 shows a flowchart of a pseudo base station identification method according to still another embodiment of the present application;
fig. 7 is a block diagram showing a configuration of a pseudo base station identifying apparatus according to an embodiment of the present application;
fig. 8 is a block diagram showing a structure of a pseudo base station identifying apparatus according to another embodiment of the present application;
Fig. 9 is a block diagram showing a structure of a pseudo base station identifying apparatus according to still another embodiment of the present application;
fig. 10 is a block diagram showing a structure of a pseudo base station identifying apparatus according to still another embodiment of the present application;
fig. 11 shows a block diagram of a mobile terminal according to the present application;
fig. 12 is a storage unit for storing or carrying program codes for implementing the pseudo base station identifying method according to the embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
With the development of mobile communication technology, mobile communication has undergone the development of multiple versions of 2G, 3G, and 4G. The base station is an important communication device, whether it is the GSM (GlobalSystemforMobile Communication) mobile communication system of the early 2G age or the CDMA (CodeDivisionMultipleAccess) communication system, or the LTE system architecture of the later 4G age.
For example, a 2G mobile communication system architecture is schematically shown in fig. 1. The base station BTS (Base StationController) is connected to BSC (BaseStation Controller) as an access device for mobile communication, and then the BSC is connected to MSC (MobileSwitchingCenter). For example, the architecture of the 4G mobile communication system shown in fig. 2 is shown. The base station eNB is connected to MME (MobilityManagementEntity), and the MME is connected to a serving gateway. As can be seen from fig. 1 and 2, in a mobile communication system, a base station has a relatively important role in the overall system architecture as a device for directly establishing a connection with a mobile terminal. The base station is generally referred to as a "public mobile communication base station", and is mainly used for providing signals for mobile terminals such as mobile phones and tablet computers. With the development of communication technology, the inventors found that a pseudo base station appears.
The pseudo base station is a pseudo base station, the equipment generally comprises a host and a notebook computer, the mobile phone card information in a certain radius range with the mobile phone card information as the center can be searched through related equipment such as a short message group transmitter, a short message sender and the like, and the short messages such as fraud, advertisement promotion and the like are forcibly sent to a user mobile phone by impersonating the mobile phone number of other people through the base station which is disguised as an operator by utilizing the defect of the mobile communication technology.
When the pseudo base station equipment operates, the wireless signal sent by the mobile terminal is forcedly connected to the equipment, so that the mobile terminal cannot normally use the service provided by an operator, the mobile terminal generally returns to normal after being temporarily disconnected for 8-12 seconds, and part of the mobile terminal can be restarted after being started and stopped. In addition, it may cause the mobile terminal user to frequently update the location, so that the wireless network resources in the area are tense and network congestion phenomenon occurs, which affects the normal communication of the user.
Therefore, the inventor proposes a method and a device for identifying a pseudo base station, a mobile terminal and a storage medium, wherein the method and the device can improve the information security of the mobile terminal and reduce the access to the pseudo base station.
Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Referring to fig. 3, the method for identifying a pseudo base station provided in the present application is applied to a mobile terminal, and the method includes:
step S110: and acquiring the frequency point of the wireless signal transmitted by the detected base station.
Typically, the base station will broadcast information outwards in real time or periodically so that the mobile terminal can find the base station. For example, in a system (for example, a GSM system, an LTE-FDD system) that uses frequency to implement multiple access technology, frequencies used when different base stations broadcast information are different, so that a mobile terminal can scan the entire frequency band or scan a part of the frequency band, and check the frequency band one by one from the strongest signal according to the strength of the signal until finding suitable base station broadcast information, so as to identify the frequency point where the suitable base station broadcast information is found as the frequency point where the detected wireless signal transmitted by the base station is located. In the process of scanning the whole frequency band or part of the frequency band, the mobile terminal detects whether the frequency point has synchronous information transmitted by the base station or not.
Optionally, the partial frequency band may be a specified frequency band pre-stored by the mobile terminal. For example, the frequency band specified by the service identification in the identification SIM card configured in the mobile terminal. Furthermore, optionally, the mobile terminal may use the frequency band successfully identified to the base station at the upper side as the partial frequency band.
For a system (CDMA) in which multiple access is implemented by code, a base station generally uses a fixed frequency (control carrier frequency) to broadcast information, and a mobile terminal can receive the guiding information of the base station only by tuning to the frequency, so as to find the base station, and further identify the tuned frequency point as the frequency point where the detected wireless signal transmitted by the base station is located.
Step S120: and acquiring the bandwidth of the frequency point.
As one way, system information broadcast by base stations is generally divided into two main categories: masterInformationBlock (MIB) messages and a plurality of SystemInformationBlocks (SIBs) messages. The MIB message is transmitted in PBCH (PhysicalBroadcastChannel) without scrambling with a radio network temporary identity RNTI; while SIB messages are transmitted in PDSCH (PhysicalDownlinkShared Channel), scrambled using SI-RNTI.
When the network side equipment (e.g., base station) is powered on, MIB messages are sent first, and then a series of SIB messages are sent. The MIB message carries basic information, which relates to decoding of the PDSCH channel, and the mobile terminal first parses out the MIB and then uses parameters in the MIB to continue decoding data in the PDSCH, including decoding SIB information.
The mobile terminal can analyze the fields dl-Bandwidth, field systemFrameNumber and field phich-Config from the MIB message. As one way, dl-Bandwidth is used to carry a downlink Bandwidth parameter, indicating the current downlink Bandwidth size, i.e., the Bandwidth of the frequency bin. The value ranges are n6 (corresponding to 1.4 MHz), n15 (corresponding to 3 MHz), n25 (corresponding to 5 MHz), n50 (corresponding to 10 MHz), n75 (corresponding to 15 MHz) and n100 (corresponding to 20 MHz), and the number of RBs occupied by the current bandwidth is respectively represented, and if n6 represents that the bandwidth occupies 6 RBs. ) The PHICH-Config is used to carry PHICH configuration parameters, including two parameters, PHICH-Duration and PHICH-Resource. The PHICH-Config is used to calculate the position of the PHICH channel. The systemFrameNumber is used to carry a system frame number for frame synchronization of the mobile terminal and the base station.
In this case, the mobile terminal may obtain the Bandwidth of the frequency point from the data carried in the field dl-Bandwidth after parsing the field dl-Bandwidth from the MIB message.
As a way, if the pseudo base station simulates the legal base station broadcasting system message, the format of the broadcasted system message may be configured according to the format of the MIB message broadcasted by the legal base station, so that after receiving the system message broadcasted by the pseudo base station, the mobile terminal identifies the frequency point of the radio signal broadcasted by the pseudo base station as the bandwidth analyzed from the system message, thereby causing the possibility that the mobile terminal identifies the pseudo base station as the legal base station by mistake.
Then, based on the above situation, as a way, the mobile terminal may first acquire the MIB system message transmitted by the detected base station; taking the bandwidth of the frequency point read from the MIB system message as the bandwidth to be compared; then, the highest transmission frequency and the lowest transmission frequency of the frequency band where the frequency point is located are obtained; taking the difference between the highest transmission frequency and the lowest transmission frequency as a reference bandwidth; and comparing the bandwidth to be compared with the reference bandwidth.
And if the difference value between the bandwidth to be compared and the reference bandwidth is smaller than a target threshold value, taking the bandwidth to be compared as the bandwidth of the frequency point. Correspondingly, if the difference between the bandwidth to be compared and the reference bandwidth is not smaller than a target threshold, the reference bandwidth is used as the bandwidth of the frequency point. It can be understood that if the difference between the Bandwidth to be compared and the reference Bandwidth is smaller than the target threshold, it is indicated that the Bandwidth of the frequency point carried by the field dl-Bandwidth in the MIB system message broadcasted by the base station is approximately the same as the Bandwidth of the frequency point actually calculated by the mobile terminal, and the mobile terminal can directly read the Bandwidth of the frequency point from the field dl-Bandwidth. If the difference between the Bandwidth to be compared and the reference Bandwidth is not smaller than the target threshold, the mobile terminal uses the reference Bandwidth as the Bandwidth of the frequency point if the Bandwidth of the frequency point carried by the dl-Bandwidth field in the MIB system message is not the real Bandwidth of the frequency point. Furthermore, the mobile terminal can more accurately acquire the bandwidth of the frequency point of the wireless signal transmitted by the detected base station through the mode.
Step S130: and judging whether the bandwidth meets a target condition.
As one way, the target condition includes at least one of the following conditions: the bandwidth is less than a target value; and the bandwidth is within a target interval. Wherein, as a way, when the maximum number of service channels supported by the base station is identified to be smaller than the target number, the target value is a first target value; and when the maximum number of the service channels supported by the base station is not less than the target number, the target value is a second target value, and the second target value is smaller than the first target value. As one way, the frequencies configured by the base stations are relatively fixed, and then the total bandwidth corresponding to one base station is relatively fixed, and in the case where the bandwidth of the traffic channel is fixed, the more traffic channels supported by the base station, the narrower the bandwidth of each traffic channel.
Then when the number of the maximum traffic channels supported by the base station is detected to be smaller than the target number, it may be determined that the bandwidth of the frequency point of the radio signal broadcast by the currently detected base station is smaller than the bandwidth of the frequency point of the base station detected when the number of the maximum traffic channels supported by the base station is identified as the target number. Accordingly, when the maximum number of traffic channels supported by the base station is detected to be not less than the target number, it may be determined that the bandwidth of the frequency point of the wireless signal broadcast by the currently detected base station is greater than the bandwidth of the frequency point of the base station detected when the maximum number of traffic channels supported by the base station is identified as the target number.
It should be noted that, a field for storing other data is reserved in the MIB system message, so as to enable, as a way, the base station to carry the maximum number of service channels supported by the base station to the field reserved for storing other data in the MIB system message when broadcasting the MIB system message, thereby achieving that the maximum number of service channels supported by the base station is obtained without affecting communication between the mobile terminal and the base station according to a predetermined protocol.
Step S140: and if the bandwidth meets the target condition, identifying the base station as a pseudo base station.
Step S150: and if the bandwidth does not meet the target condition, identifying that the base station is not a pseudo base station.
According to the pseudo base station identification method, under the condition that the frequency point of a wireless signal transmitted by a detected base station is obtained, and the bandwidth of the frequency point is further obtained, whether the bandwidth meets a target condition is judged, and if the bandwidth meets the target condition, the base station is identified as the pseudo base station. Therefore, whether the base station is a pseudo base station or not is identified through the bandwidth of the frequency point of the wireless signal sent by the base station, and further the safety of the mobile terminal is improved, so that the probability of information leakage caused by the fact that the mobile terminal is accessed to the pseudo base station is reduced.
Referring to fig. 4, the method for identifying a pseudo base station provided in the present application is applied to a mobile terminal, and the method includes:
step S210: and acquiring the frequency point of the wireless signal transmitted by the detected base station.
Step S220: and acquiring the bandwidth of the frequency point.
Step S230: and acquiring the MIB system message transmitted by the detected base station.
Step S240: and reading target conditions from target fields configured in the MIB system message.
Referring to the description of the MIB system message, in one manner, the fields dl-Bandwidth, the field systemframe number and the field phich-Config parsed from the MIB message can be encoded only by 14bits, and if the base station adopts the ASN1 encoding manner, byte alignment is required when the ASN1 encoding is considered, so that a space of 16bits can be used for the lowest possible MIB. However, if the MIB occupies 16bits, the number of reserved bits is only 2, and the reserved bits are limited in the future, so that as a way, a space of 24bits can be allocated for the MIB system message, and the reserved bits are 10bits.
Then, as one way, the base station may configure a target field in the reserved location of the MIB system message for writing the target condition. For example, the field target_condition. The mobile terminal may read the Target condition from the Target field, e.g., the field Target _ condition, after receiving the MIB system message. Alternatively, the base station may configure the target area specifying parameter field and the plurality of fields to be selected in the reserved position of the MIB system message, where at least one field of the plurality of fields to be selected carries the target condition described above. Wherein the parameter in the target area designation parameter field is used to instruct the mobile terminal to read the target condition from that one of the plurality of fields to be selected. For example, in the case where the plurality of fields to be selected include a field select_one, a field select_two, and a field select_thr, the base station may write one target condition in each of the field select_one, the field select_two, and the field select_thr, respectively.
Then, the base station can write the target condition carried by which field of the field select_one, the field select_two and the field select_thr of the mobile terminal which subsequently receives the MIB system message as the target condition of the subsequent judging step in the target area specifying parameter field. The data written in the target area specified parameter field may be a specific name of the field to be selected, or may be a number for identifying the field to be selected. For example, if the content in the parameter field specified by the target area is select_one, the mobile terminal is characterized in that after acquiring the MIB system message, the target condition read from the parameter field select_one is used as the target condition of the subsequent judging step. If the content in the target area specified parameter field is select_thr, the mobile terminal is characterized in that after acquiring the MIB system message, the target condition read from the field select_thr is used as the target condition of the subsequent judging step.
And if the content in the specified parameter field of the target area is 1, the target condition read from the field select_one is used as the target condition of the subsequent judging step after the mobile terminal is characterized to acquire the MIB system message. If the content in the specified parameter field of the target area is 2, the target condition read from the field select_two is used as the target condition of the subsequent judging step after the mobile terminal is characterized to acquire the MIB system message. If the content in the specified parameter field of the target area is 3, the target condition read from the field select_thr is used as the target condition of the subsequent judging step after the mobile terminal is characterized to acquire the MIB system message.
It can be understood that by the above method for determining the target condition, the base station can flexibly set the target condition, and the corresponding mobile terminal can also flexibly acquire the target condition, and by the above method for acquiring the target condition, the pseudo base station is not easy to counterfeit, thereby improving the accuracy of the follow-up verification of the pseudo base station.
Step S250: and judging whether the bandwidth meets a target condition.
Step S260: and if the bandwidth meets the target condition, identifying the base station as a pseudo base station.
Step S270: and if the bandwidth does not meet the target condition, identifying that the base station is not a pseudo base station.
According to the pseudo base station identification method, under the condition that a frequency point where a wireless signal transmitted by a detected base station is located is obtained, and the bandwidth of the frequency point is further obtained, whether the bandwidth meets a target condition read from a target field configured in an MIB system message is judged, and if the bandwidth meets the target condition, the base station is identified as the pseudo base station. Therefore, whether the base station is a pseudo base station or not is identified through the bandwidth of the frequency point of the wireless signal sent by the base station, and further the safety of the mobile terminal is improved, so that the probability of information leakage caused by the fact that the mobile terminal is accessed to the pseudo base station is reduced. And, since the target condition is read from the broadcast message of the base station, whether the base station is a pseudo base station can be evaluated in real time with the latest target condition.
Referring to fig. 5, the method for identifying a pseudo base station provided in the present application is applied to a mobile terminal, and the method includes:
step S310: and acquiring the frequency point of the wireless signal transmitted by the detected base station.
Step S320: and acquiring the service identifier stored by the mobile terminal.
As one approach, the mobile terminal may store the service identification in memory. In this case, the mobile terminal may read the stored service identity directly from the memory. Alternatively, in case the mobile terminal is provided with a subscriber identity module SIM card, the mobile terminal may read the service identity directly from the SIM card.
Step S330: and acquiring a set frequency band which can be accessed by the mobile terminal and is identified by the service identification.
Step S340: judging whether the frequency point is in the set frequency band or not.
It will be appreciated that, based on the definition of the 3GPP protocol, there are corresponding band numbers for the different bands and bandwidths for each band. For example, band38 corresponds to a frequency Band of 2570-2620MHz, band39 corresponds to a frequency Band of 1880-1920MHz, band40 corresponds to a frequency Band of 2300-2400MHz, and Band41 corresponds to a frequency Band of 2496-2690MHz. The service identity stored in the mobile terminal may be, as one way, a radio frequency band that the mobile terminal can legally access. Alternatively, the service identifier may be a frequency band number. For example, if the service identifier is band40, the set frequency band that characterizes the mobile terminal can access includes 2300-2400MHz.
Step S350: and if yes, acquiring the bandwidth of the frequency point.
If not, ending the flow.
Step S360: and judging whether the bandwidth meets a target condition.
Step S370: and if the bandwidth meets the target condition, identifying the base station as a pseudo base station.
Step S380: and if the bandwidth does not meet the target condition, identifying that the base station is not a pseudo base station.
According to the pseudo base station identification method, when a frequency point of a wireless signal transmitted by a detected base station is obtained, and when the frequency point is judged to be in a set frequency band which can be accessed by a mobile terminal and the bandwidth of the frequency point is further obtained, whether the bandwidth meets a target condition is judged, and if the bandwidth meets the target condition, the base station is identified as the pseudo base station. Therefore, whether the base station is a pseudo base station or not is identified through the bandwidth of the frequency point of the wireless signal sent by the base station, and further the safety of the mobile terminal is improved, so that the probability of information leakage caused by the fact that the mobile terminal is accessed to the pseudo base station is reduced.
Referring to fig. 6, the method for identifying a pseudo base station provided in the present application is applied to a mobile terminal, and the method includes:
Step S410: and acquiring the frequency point of the wireless signal transmitted by the detected base station.
Step S420: and acquiring the bandwidth of the frequency point.
Step S430: and judging whether the bandwidth meets a target condition.
Step S440: and if the bandwidth meets the target condition, judging whether target neighbor information can be acquired from the system message sent by the base station.
It will be appreciated that the mobile terminal may initiate cell reselection after cell camping. Cell reselection refers to the process by which the mobile terminal provides a service signal by monitoring the signal quality of neighboring cells and the current cell in idle mode. When the signal quality and level of the neighbor cell meet the S criterion and meet a certain reselection decision criterion, the terminal will access the cell to reside. After the mobile terminal successfully camps on a new cell, the cell measurement is continuously performed. In the process of cell reselection, the mobile terminal will first select a cell included in neighbor cell information acquired from the current base station. While typically the pseudo base station is emulated by a single device, in which case the system message broadcast by the pseudo base station will not carry neighbor information.
In this case, as one way, the target neighbor information satisfies at least one of the following conditions: the data format of the neighbor cell information accords with the target format; the bandwidth of the frequency point where the wireless signal is transmitted by the base station carried in the neighbor cell information is the same as the bandwidth of the frequency point where the wireless signal is transmitted by the detected base station.
Step S450: and if the target neighbor cell information cannot be acquired, identifying the base station as a pseudo base station.
According to the pseudo base station identification method, under the condition that the frequency point of a wireless signal transmitted by a detected base station is obtained, and the bandwidth of the frequency point is further obtained, whether the bandwidth meets a target condition is judged, if the bandwidth meets the target condition, whether target neighbor cell information can be obtained from a system message sent by the base station is further judged, and if the target neighbor cell information cannot be obtained, the base station is identified as the pseudo base station. Therefore, whether the base station is a pseudo base station or not is identified through the bandwidth of the frequency point of the wireless signal sent by the base station, and further the safety of the mobile terminal is improved, so that the probability of information leakage caused by the fact that the mobile terminal is accessed to the pseudo base station is reduced.
Referring to fig. 7, a pseudo base station identifying apparatus 500 provided in the present application operates in a mobile terminal, where the apparatus 500 includes: frequency point information acquisition section 510, bandwidth information acquisition section 520, judgment section 530, and pseudo base station identification section 540.
The frequency point information obtaining unit 510 is configured to obtain a frequency point where the wireless signal transmitted by the detected base station is located.
A bandwidth information obtaining unit 520, configured to obtain a bandwidth of the frequency point.
As one way, the bandwidth information obtaining unit 520 is specifically configured to obtain MIB system information transmitted by the detected base station; taking the bandwidth of the frequency point read from the MIB system message as the bandwidth to be compared; acquiring the highest transmission frequency and the lowest transmission frequency of the frequency band where the frequency point is located; taking the difference between the highest transmission frequency and the lowest transmission frequency as a reference bandwidth; comparing the bandwidth to be compared with the reference bandwidth; and if the difference value between the bandwidth to be compared and the reference bandwidth is smaller than a target threshold value, taking the bandwidth to be compared as the bandwidth of the frequency point.
A judging unit 530, configured to judge whether the bandwidth meets a target condition. As one way, the target condition includes at least one of the following conditions: the bandwidth is less than a target value; and the bandwidth is within a target interval. Wherein, as a way, when the maximum number of service channels supported by the base station is identified to be smaller than the target number, the target value is a first target value; and when the maximum number of the service channels supported by the base station is not less than the target number, the target value is a second target value, and the second target value is smaller than the first target value.
And a pseudo base station identifying unit 540, configured to identify the base station as a pseudo base station if the bandwidth meets the target condition.
According to the pseudo base station identification device, under the condition that the frequency point of a wireless signal transmitted by a detected base station is obtained, and the bandwidth of the frequency point is further obtained, whether the bandwidth meets a target condition is judged, and if the bandwidth meets the target condition, the base station is identified as the pseudo base station. Therefore, whether the base station is a pseudo base station or not is identified through the bandwidth of the frequency point of the wireless signal sent by the base station, and further the safety of the mobile terminal is improved, so that the probability of information leakage caused by the fact that the mobile terminal is accessed to the pseudo base station is reduced.
Referring to fig. 8, a pseudo base station identifying apparatus 600 provided in the present application operates in a mobile terminal, where the apparatus 600 includes: frequency point information acquisition unit 610, bandwidth information acquisition unit 620, system message acquisition unit 630, target condition reading unit 640, judgment unit 650, and pseudo base station identification unit 660.
The frequency point information obtaining unit 610 is configured to obtain a frequency point where the wireless signal transmitted by the detected base station is located.
And a bandwidth information obtaining unit 620, configured to obtain the bandwidth of the frequency point.
A system message obtaining unit 630, configured to obtain the MIB system message transmitted by the detected base station.
And a target condition reading unit 640 for reading a target condition from a target field configured in the MIB system message.
A determining unit 650, configured to determine whether the bandwidth meets a target condition.
And a pseudo base station identifying unit 660, configured to identify the base station as a pseudo base station if the bandwidth meets the target condition.
According to the pseudo base station identification device, under the condition that a frequency point where a wireless signal transmitted by a detected base station is located is obtained, and the bandwidth of the frequency point is further obtained, whether the bandwidth meets a target condition read from a target field configured in an MIB system message is judged, and if the bandwidth meets the target condition, the base station is identified as the pseudo base station. Therefore, whether the base station is a pseudo base station or not is identified through the bandwidth of the frequency point of the wireless signal sent by the base station, and further the safety of the mobile terminal is improved, so that the probability of information leakage caused by the fact that the mobile terminal is accessed to the pseudo base station is reduced. And, since the target condition is read from the broadcast message of the base station, whether the base station is a pseudo base station can be evaluated in real time with the latest target condition.
Referring to fig. 9, a pseudo base station identifying apparatus 700 provided in the present application operates in a mobile terminal, where the apparatus 700 includes: frequency point information acquisition unit 710, identification acquisition unit 720, set frequency band identification unit 730, frequency point judgment unit 740, bandwidth information acquisition unit 750, judgment unit 760, and pseudo base station identification unit 770.
And the frequency point information obtaining unit 710 is configured to obtain a frequency point where the wireless signal transmitted by the detected base station is located. An identifier obtaining unit 720, configured to obtain a service identifier stored in the mobile terminal.
And the set frequency band identification unit 730 is configured to obtain a set frequency band that can be accessed by the mobile terminal identified by the service identifier. The frequency point determining unit 740 is configured to determine whether the frequency point is within the set frequency band.
The bandwidth information obtaining unit 750 is configured to obtain the bandwidth of the frequency point if the bandwidth is available. And a judging unit 760 for judging whether the bandwidth satisfies a target condition. And a pseudo base station identifying unit 770, configured to identify the base station as a pseudo base station if the bandwidth satisfies the target condition.
According to the pseudo base station identification device, when the frequency point of the wireless signal transmitted by the detected base station is obtained, and the frequency point is judged to be in the set frequency band which can be accessed by the mobile terminal, and the bandwidth of the frequency point is further obtained, whether the bandwidth meets the target condition is judged, and if the bandwidth meets the target condition, the base station is identified as the pseudo base station. Therefore, whether the base station is a pseudo base station or not is identified through the bandwidth of the frequency point of the wireless signal sent by the base station, and further the safety of the mobile terminal is improved, so that the probability of information leakage caused by the fact that the mobile terminal is accessed to the pseudo base station is reduced.
Referring to fig. 10, a pseudo base station identifying apparatus 800 provided in the present application operates in a mobile terminal, where the apparatus 800 includes: frequency point information acquisition unit 810, bandwidth information acquisition unit 820, judgment unit 830, neighbor information judgment unit 840, and pseudo base station identification unit 850.
The frequency point information obtaining unit 810 is configured to obtain a frequency point where the detected wireless signal transmitted by the base station is located.
And a bandwidth information obtaining unit 820, configured to obtain the bandwidth of the frequency point.
A judging unit 830, configured to judge whether the bandwidth meets a target condition.
And a neighbor information judging unit 840, configured to judge whether the target neighbor information can be obtained from the system message sent by the base station if the bandwidth meets the target condition.
As one way, the target neighbor information satisfies at least one of the following conditions: the data format of the neighbor cell information accords with the target format; the bandwidth of the frequency point where the wireless signal is transmitted by the base station carried in the neighbor cell information is the same as the bandwidth of the frequency point where the wireless signal is transmitted by the detected base station.
And the pseudo base station identifying unit 850 is configured to identify the base station as a pseudo base station if the target neighbor information cannot be acquired.
According to the pseudo base station identification device, under the condition that the frequency point of a wireless signal transmitted by a detected base station is obtained, and the bandwidth of the frequency point is further obtained, whether the bandwidth meets the target condition is judged, if the bandwidth meets the target condition, whether target neighbor cell information can be obtained from a system message sent by the base station is further judged, and if the target neighbor cell information cannot be obtained, the base station is identified as the pseudo base station. Therefore, whether the base station is a pseudo base station or not is identified through the bandwidth of the frequency point of the wireless signal sent by the base station, and further the safety of the mobile terminal is improved, so that the probability of information leakage caused by the fact that the mobile terminal is accessed to the pseudo base station is reduced.
It should be noted that, MIB system information described in the present application is MIB information in a system message broadcasted by a base station.
It should be noted that, for convenience and brevity, specific working procedures of the apparatus and units described above may refer to corresponding procedures in the foregoing method embodiments, and are not described herein again. In several embodiments provided herein, the coupling of the modules to each other may be electrical. In addition, each functional module in the embodiments of the present application may be integrated in one processing module, or two or more modules may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules.
In addition to the judgment conditions described in the present application, other judgment conditions may be added to judge to increase the accuracy of the pseudo base station identification. For example, it is also possible to increase the strength of a broadcast system message of a detected base station or to detect whether the base station can support a data communication function (i.e., whether it has a PS domain) to determine whether the detected base station is a pseudo base station.
In summary, according to the method, the device, the mobile terminal and the storage medium for identifying the pseudo base station provided by the application, under the condition that the frequency point of the wireless signal transmitted by the detected base station is obtained and the bandwidth of the frequency point is further obtained, whether the bandwidth meets the target condition is judged, and if the bandwidth meets the target condition, the base station is identified as the pseudo base station. Therefore, whether the base station is a pseudo base station or not is identified through the bandwidth of the frequency point of the wireless signal sent by the base station, and further the safety of the mobile terminal is improved, so that the probability of information leakage caused by the fact that the mobile terminal is accessed to the pseudo base station is reduced.
A mobile terminal provided in the present application will be described with reference to fig. 11.
Referring to fig. 11, based on the above-mentioned method and apparatus for identifying a pseudo base station, another mobile terminal 100 capable of executing the foregoing method for identifying a pseudo base station is further provided in the embodiments of the present application. The mobile terminal 100 includes one or more (only one shown) processors 102, memory 104, and a wireless module 106 coupled to one another. The memory 104 stores therein a program capable of executing the contents of the foregoing embodiments, and the processor 102 can execute the program stored in the memory 104.
Wherein the processor 102 may include one or more processing cores. The processor 102 utilizes various interfaces and lines to connect various portions of the overall mobile terminal 100, perform various functions of the mobile terminal 100, and process data by executing or executing instructions, programs, code sets, or instruction sets stored in the memory 104, and invoking data stored in the memory 104. Alternatively, the processor 102 may be implemented in hardware in at least one of digital signal processing (DigitalSignalProcessing, DSP), field programmable gate array (Field-ProgrammableGateArray, FPGA), and programmable logic array (ProgrammableLogicArray, PLA). The processor 102 may integrate one or a combination of several of a Central processor (Central ProcessingUnit, CPU), an image processor (GraphicsProcessingUnit, GPU), a modem, etc. The CPU mainly processes an operating system, a user interface, an application program and the like; the GPU is used for being responsible for rendering and drawing of display content; the modem is used to handle wireless communications. It will be appreciated that the modem may not be integrated into the processor 102 and may be implemented solely by a single communication chip.
The memory 104 may include a random access memory (RandomAccessMemory, RAM) or a Read-only memory (Read-only memory). Memory 104 may be used to store instructions, programs, code sets, or instruction sets. The memory 104 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for implementing at least one function (e.g., a touch function, a sound playing function, an image playing function, etc.), instructions for implementing the various method embodiments described below, etc. The storage data area may also store data created by the terminal 100 in use (such as phonebook, audio-video data, chat-record data), etc.
The wireless module 106 is configured to receive and transmit electromagnetic waves, and to implement mutual conversion between the electromagnetic waves and the electrical signals, so as to communicate with a communication network or other devices, such as an audio playback device. The wireless module 106 may include various existing circuit elements for performing these functions, such as an antenna, a radio frequency transceiver, a digital signal processor, an encryption/decryption chip, a Subscriber Identity Module (SIM) card, memory, and the like. The wireless module 106 may communicate with various networks such as the internet, intranets, wireless networks, or other devices via wireless networks. The wireless network may include a cellular telephone network, a wireless local area network, or a metropolitan area network. For example, the wireless module 106 may interact with a base station.
Referring to fig. 12, a block diagram of a computer readable storage medium according to an embodiment of the present application is shown. The computer readable storage medium 900 has stored therein program code that can be invoked by a processor to perform the methods described in the method embodiments described above.
The computer readable storage medium 900 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read only memory), an EPROM, a hard disk, or a ROM. Optionally, the computer readable storage medium 900 comprises a non-volatile computer readable medium (non-transitory computer-readabblestonemagemedium). The computer readable storage medium 900 has storage space for program code 910 that performs any of the method steps described above. The program code can be read from or written to one or more computer program products. Program code 910 may be compressed, for example, in a suitable form.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, one of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (17)
1. A pseudo base station identification method, characterized by being applied to a mobile terminal, the method comprising:
acquiring a frequency point of a wireless signal transmitted by a detected base station;
acquiring MIB system information transmitted by the detected base station;
taking the bandwidth of the frequency point read from the MIB system message as the bandwidth to be compared;
acquiring the highest transmission frequency and the lowest transmission frequency of the frequency band where the frequency point is located;
taking the difference between the highest transmission frequency and the lowest transmission frequency as a reference bandwidth;
comparing the bandwidth to be compared with the reference bandwidth;
if the difference value between the bandwidth to be compared and the reference bandwidth is smaller than a target threshold value, taking the bandwidth to be compared as the bandwidth of the frequency point;
judging whether the bandwidth meets a target condition or not;
and if the bandwidth meets the target condition, identifying the base station as a pseudo base station.
2. The method of claim 1, wherein the target condition comprises at least one of:
the bandwidth is less than a target value; and
the bandwidth is within a target interval.
3. The method of claim 2, wherein the target condition comprises the bandwidth being less than a target value, the method further comprising:
And when the maximum number of the service channels supported by the base station is identified to be smaller than the target number, the target value is a first target value.
4. A method according to claim 3, wherein the target condition comprises the bandwidth being less than a target value, the method further comprising:
and when the maximum number of the service channels supported by the base station is not less than the target number, the target value is a second target value, and the second target value is smaller than the first target value.
5. The method of claim 1, wherein the step of determining whether the bandwidth meets a target condition further comprises:
and reading the target condition from a target field configured in the MIB system message.
6. The method of claim 5 wherein the MIB system message includes a target region specifying parameter field and a plurality of fields to be selected, each field to be selected corresponding to a target condition, the step of reading the target condition from a target field configured in the MIB system message comprising:
determining a target field from the plurality of fields to be selected according to the content of the target area specified parameter field;
The target condition is read from the target field.
7. The method of claim 1, wherein the step of acquiring the bandwidth of the frequency bin is preceded by the step of:
acquiring a service identifier stored by the mobile terminal;
acquiring a set frequency band which can be accessed by the mobile terminal and is identified by the service identification;
judging whether the frequency point is in the set frequency band or not;
and if yes, executing the bandwidth obtaining of the frequency point.
8. The method of claim 7, wherein the step of obtaining the service identity stored by the mobile terminal comprises:
and reading the service identifier from a Subscriber Identity Module (SIM) card configured in the mobile terminal.
9. The method according to any of claims 1-8, wherein the step of identifying the base station as a pseudo base station is preceded by the step of:
judging whether target neighbor cell information can be obtained from a system message sent by the base station;
and if the target neighbor cell information cannot be acquired, executing the identification of the base station as a pseudo base station.
10. The method of claim 9, wherein the target neighbor information satisfies at least one of the following conditions:
The data format of the neighbor cell information accords with the target format;
the bandwidth of the frequency point where the wireless signal is transmitted by the base station carried in the neighbor cell information is the same as the bandwidth of the frequency point where the wireless signal is transmitted by the detected base station.
11. The method according to claim 1, wherein the method further comprises:
and if the difference value between the bandwidth to be compared and the reference bandwidth is not smaller than a target threshold value, taking the reference bandwidth as the bandwidth of the frequency point.
12. A pseudo base station identification apparatus operable in a mobile terminal, the apparatus comprising:
the frequency point information acquisition unit is used for acquiring the frequency point of the wireless signal transmitted by the detected base station;
a bandwidth information acquisition unit, configured to acquire MIB system information transmitted by the detected base station; taking the bandwidth of the frequency point read from the MIB system message as the bandwidth to be compared; acquiring the highest transmission frequency and the lowest transmission frequency of the frequency band where the frequency point is located; taking the difference between the highest transmission frequency and the lowest transmission frequency as a reference bandwidth; comparing the bandwidth to be compared with the reference bandwidth; if the difference value between the bandwidth to be compared and the reference bandwidth is smaller than a target threshold value, taking the bandwidth to be compared as the bandwidth of the frequency point;
A judging unit, configured to judge whether the bandwidth meets a target condition;
and the pseudo base station identification unit is used for identifying the base station as a pseudo base station if the bandwidth meets the target condition.
13. The apparatus of claim 12, wherein the target condition comprises at least one of:
the bandwidth is less than a target value; and
the bandwidth is within a target interval.
14. The apparatus according to claim 12 or 13, characterized in that the apparatus further comprises:
a target condition acquisition unit, configured to acquire MIB system messages transmitted by the detected base station; and reading the target condition from a target field configured in the MIB system message.
15. The apparatus according to any one of claims 12-13, wherein the apparatus further comprises:
the frequency point judging unit is used for acquiring the service identifier stored by the mobile terminal; acquiring a set frequency band which can be accessed by the mobile terminal and is identified by the service identification; judging whether the frequency point is in the set frequency band or not;
the bandwidth information obtaining unit is used for judging that the frequency point is in the set frequency band by the frequency point judging unit and obtaining the bandwidth of the frequency point.
16. A mobile terminal comprising one or more processors and memory;
one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs configured to perform the method of any of claims 1-11.
17. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a program code, wherein the method of any of claims 1-11 is performed when the program code is run.
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| PCT/CN2018/113206 WO2020087416A1 (en) | 2018-10-31 | 2018-10-31 | Pseudo base station recognization method and device, mobile terminal, and storage medium |
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| CN112690011A (en) | 2021-04-20 |
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