CN113038476A - Pseudo base station cell identification method and device - Google Patents
Pseudo base station cell identification method and device Download PDFInfo
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- CN113038476A CN113038476A CN202011127260.7A CN202011127260A CN113038476A CN 113038476 A CN113038476 A CN 113038476A CN 202011127260 A CN202011127260 A CN 202011127260A CN 113038476 A CN113038476 A CN 113038476A
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Abstract
The scheme provides a method and a device for identifying at least one pseudo base station cell, wherein the method for identifying the pseudo base station cell comprises the following steps: when the communication device receives the short message within first preset time after residing in the target cell, judging whether position updating is triggered within second preset time after the communication device receives the short message and whether a network corresponding to the target cell refuses a position updating request; and when the communication device triggers the position updating again in the second preset time after receiving the short message and the network corresponding to the target cell rejects the request of the position updating, determining the target cell as a pseudo base station cell. One of the advantages of the invention is that the occurrence of the mobile terminal residing in the pseudo base station can be effectively prevented and reduced, and the probability of the mobile terminal receiving fraud short messages and advertisement promotion is reduced, thereby improving the user experience.
Description
Technical Field
The present invention relates to pseudo base station identification, and more particularly, to a method and apparatus for identifying a pseudo base station cell suitable for a communication device.
Background
With the rapid development of wireless communication technologies such as GSM technology, W-CDMA technology, LTE technology, etc., single-mode mobile phones and multi-mode mobile phones are widely used, and illegal people often send spam short messages (or short messages) to mobile terminal users through pseudo base stations to perform advertising promotion, fraud, etc., which seriously affects user experience.
Generally, a pseudo base station is composed of a host, an engineering machine, a notebook computer and a signal interference unit. The pseudo base station obtains a Broadcast Control Channel (BCCH) frequency point and field intensity information of a 2G adjacent cell (adjacent cell) through an engineering machine, and selects the 2G cell for camouflage. And adjusting the signal strength of the pseudo base station, and sucking the pseudo base station into the mobile terminal for residence. When the mobile terminal resides in the 3G, 4G cell, the pseudo base station will force the mobile terminal to reside to the pseudo base station through the signal interference device. After the pseudo base station sends the spam short message to the mobile terminal, the mobile terminal is forced to leave the cell of the pseudo base station.
Currently, the existing pseudo base station identification method is mainly implemented by detecting a change of a Location Area Code (LAC) of a serving cell. By identifying the pseudo base station cell in the way, the mobile terminal must reside in the pseudo base station cell first, and the invasion of the spam short messages of the pseudo base station cell cannot be avoided. In addition, the pseudo base station can achieve the purposes of not changing LAC and triggering position updating in a short time after sending the spam short message by adjusting the periodic position updating time length, and the existing pseudo base station identification mechanism cannot detect the existence of the pseudo base station cell under the condition.
Therefore, it is desirable to provide a new pseudo base station identification method capable of preventing the pseudo base station cell from camping.
Disclosure of Invention
In view of this, the present invention provides a method and an apparatus for identifying a pseudo base station cell, and a method for preventing a pseudo base station cell from camping.
Before residing, the mobile terminal carries out pseudo base station prejudgment on the target cell according to the prior information and the system information of the target cell, and avoids residing to the pseudo base station cell. After residing, the mobile terminal identifies the pseudo base station for the service cell according to the behavior of the mobile terminal, so that the mobile terminal can be separated from the pseudo base station cell as soon as possible after residing the pseudo base station cell and prevent the pseudo base station cell from residing again.
The method for identifying the pseudo base station cell according to the embodiment of the invention is suitable for a communication device, and comprises the following steps: receiving system information of a target cell; judging whether the target cell is contained in a real cell list or not according to the received system information of the target cell; comparing the received system information of the target cell with system information of the target cell in the real cell list to generate a first comparison result when the target cell is included in the real cell list; and determining whether the target cell is a pseudo base station cell according to the first comparison result.
The method for identifying a pseudo base station cell according to an embodiment of the present invention is characterized in that the step of determining whether the target cell is a pseudo base station cell according to the first comparison result includes: when the first comparison result indicates that the difference between the received system information of the target cell and the system information of the corresponding target cell in the real cell list is greater than or equal to a first threshold value, determining that the target cell is a pseudo base station cell. The method for identifying a pseudo base station cell according to an embodiment of the present invention further includes: judging whether the target cell is contained in a pseudo base station cell list or not according to the received system information of the target cell; and when the target cell is contained in the pseudo base station cell list, determining that the target cell is a pseudo base station cell. The method for identifying a pseudo base station cell according to an embodiment of the present invention further includes: comparing the received system information of the target cell with information in a pseudo base station identification table to generate a second comparison result when the target cell is not included in the real cell list; and determining the target cell as a pseudo base station cell according to the second comparison result. According to an embodiment of the present invention, the step of determining whether the target cell is a pseudo base station cell according to the second comparison result includes: when the second comparison result indicates that the number of the same parameters of the received system information of the target cell and the information in the pseudo base station identification table is greater than or equal to a second threshold value, determining that the target cell is a pseudo base station cell; or comparing part or all of the received system information of the target cell with corresponding part or all of the received system information of the target cell in the pseudo base station identification table, accumulating weights corresponding to one or more parameters which are simultaneously appeared in the pseudo base station identification table and the system information of the target cell, and determining the target cell as the pseudo base station cell when the accumulated weight sum is greater than or equal to a third threshold value; or comparing part or all of the received system information of the target cell with part or all of the corresponding parameters in the pseudo base station identification table, determining corresponding weights according to value range intervals corresponding to the values of the part or all of the parameters of the target cell in preset value ranges of the part or all of the corresponding parameters in the pseudo base station identification table, accumulating the weights of the part or all of the parameters corresponding to the target cell, and determining the target cell as the pseudo base station cell when the accumulated weight sum is greater than or equal to a fourth threshold value. According to an embodiment of the present invention, the pseudo base station identification table includes part or all of information units in cell system information, and a value range of the part or all of the information units is set according to a main characteristic that system information of a pseudo base station cell is different from a normal base station cell. According to an embodiment of the present invention, the pseudo base station cell list is used to record information of pseudo base station cells that the mobile terminal has identified. According to an embodiment of the present invention, the real cell list is used to record information of a real cell in which the mobile terminal successfully camps. The method for identifying a pseudo base station cell according to an embodiment of the present invention further includes: and updating the information of the pseudo base station cell list according to the information of the target cell confirmed as the pseudo base station. According to an embodiment of the present invention, the cell information in the pseudo base station cell list has valid time. According to an embodiment of the present invention, the cell information in the real cell list has a valid time.
According to another embodiment of the present invention, a method for identifying a pseudo base station cell is applied to a communication device, and the method for identifying a pseudo base station cell includes: when the communication device receives a short message within first preset time after residing in a target cell, judging whether position updating is triggered within second preset time after the communication device receives the short message, and whether a network corresponding to the target cell refuses the request of the position updating; and when the communication device triggers position updating again in the second preset time after receiving the short message and the network corresponding to the target cell rejects the request of the position updating, determining that the target cell is a pseudo base station cell.
The method for identifying a pseudo base station cell according to an embodiment of the present invention further includes: if the location update is not triggered within a second predetermined time after the communication device receives the short message or the network corresponding to the target cell does not reject the request of the location update, determining whether the communication device receives bad blocks of which the number is greater than or equal to a fifth threshold value on a control channel within a third predetermined time after the communication device receives the short message or not under the condition that the signal quality of the target cell is not lower than a predetermined level; and when determining that the communication device receives bad blocks with the number larger than or equal to a fifth threshold value on a control channel in a third preset time after receiving the short message, determining that the target cell is a pseudo base station cell. According to an embodiment of the present invention, information of the target cell determined as the pseudo base station cell is added to a pseudo base station list. The method for identifying a pseudo base station cell according to another embodiment of the present invention further includes: when the communication device does not receive the short message within the first preset time after residing in the target cell, determining that the target cell is a non-pseudo base station cell; according to another embodiment of the present invention, when the location update is not triggered within the second predetermined time after the communication device receives the short message or the network corresponding to the target cell does not reject the request for the location update, if the signal quality of the target cell is not lower than the predetermined level, it is determined that the communication device does not receive the bad blocks whose number is greater than or equal to the third threshold on the control channel within the third predetermined time after receiving the short message, and then it is determined that the target cell is a non-pseudo base station cell. According to an embodiment of the present invention, information of the target cell determined to be a non-pseudo base station cell is added to a real cell list.
A communication apparatus according to an embodiment of the present invention includes: the processor is used for judging whether the target cell is contained in a real cell list or not according to the received system information of the target cell, comparing the received system information of the target cell with the system information of the target cell corresponding to the target cell in the real cell list when the target cell is contained in the real cell list to generate a first comparison result, and determining whether the target cell is a pseudo base station cell or not according to the first comparison result. According to an embodiment of the present invention, when the target cell is not included in the real cell list, the processor compares the system information received for the target cell with information in a pseudo base station identification table to generate a second comparison result, and determines whether the target cell is a pseudo base station cell according to the second comparison result.
A communication apparatus according to an embodiment of the present invention includes: the processor is configured to determine whether to trigger location updating within a second predetermined time after the communication device receives the short message and whether the network corresponding to the target cell rejects the request for location updating when the communication device receives the short message within a first predetermined time after residing in the target cell, and determine that the target cell is a pseudo base station cell when the communication device triggers location updating again within the second predetermined time after receiving the short message and the network corresponding to the target cell rejects the request for location updating. According to an embodiment of the present invention, if no location update is triggered within a second predetermined time after the communication device receives the short message or the network corresponding to the target cell does not reject the request for location update, the processor determines whether the communication device receives bad blocks whose number is greater than or equal to a fifth threshold on a control channel within a third predetermined time after the communication device receives the short message if the signal quality of the target cell is not lower than a predetermined level, and determines that the target cell is a pseudo base station cell when the communication device receives bad blocks whose number is greater than or equal to the fifth threshold on the control channel within the third predetermined time after the communication device receives the short message. According to an embodiment of the present invention, when the communication device does not receive the short message within the first predetermined time after camping on the target cell, the processor determines that the target cell is a non-pseudo base station cell; or when the location update is not triggered within the second predetermined time after the communication device receives the short message or the network corresponding to the target cell does not reject the request for the location update, and under the condition that the signal quality of the target cell is not lower than a predetermined level, if the communication device does not receive the bad blocks of which the number is greater than or equal to the fifth threshold value on the control channel within the third predetermined time after the communication device receives the short message, the processor determines that the target cell is a non-pseudo base station cell.
One of the advantages of the method and the device for identifying at least one pseudo base station cell provided by the invention is that the occurrence of the mobile terminal residing in the pseudo base station can be effectively prevented and reduced, and the probability of the mobile terminal receiving fraud short messages and advertising promotion is reduced, thereby improving the user experience.
Drawings
Fig. 1 is a block diagram of a communication device according to an embodiment of the invention.
Fig. 2 is a flow chart of a pre-judging of a pseudo base station cell according to an embodiment of the present invention, wherein fig. 2A is a flow chart of a pre-judging of a pseudo base station cell when there is a priori information of the pseudo base station cell according to an embodiment of the present invention. Fig. 2B is a flow chart of a pre-determination of a pseudo base station cell without prior information according to an embodiment of the present invention.
Fig. 3 is a flow chart of pseudo base station cell identification according to an embodiment of the invention.
Fig. 4 is a pseudo base station identification table according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of an apparatus 500 for identifying a pseudo base station cell according to an embodiment of the invention.
Detailed Description
In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to substantially achieve the technical result. Furthermore, the term "coupled" is intended to include any direct or indirect electrical connection. Thus, if a first device couples to a second device, that connection may be through a direct electrical connection, or through an indirect electrical connection via other devices and connections. The term "connected" is used herein to include any direct and indirect, wired or wireless connection. The present invention is illustrated by the following description of embodiments in conjunction with the accompanying drawings, but the method and steps in the following description are only for the purpose of explanation and should not be used to limit the present invention. Specific embodiments for carrying out the invention are described below. The following description is made for the purpose of illustrating the general principles of the invention and is not to be taken in a limiting sense. Therefore, the protection scope of the present invention should be determined by the appended claims.
Fig. 1 is a block diagram of a communication device according to an embodiment of the invention. The communication device 100 may be a mobile terminal, a notebook computer, a mobile phone, a portable game device, a portable multimedia player, a Global Positioning System (GPS), a receiver, a personal digital assistant, a tablet computer, or other devices. The communication device 100 may include a baseband signal processing device 110, an rf signal processing device 120, a processor 130, a memory device 140, and an antenna module including at least one antenna. It is noted that for purposes of clarity and understanding of the concepts of the present invention, FIG. 1 is a simplified block diagram in which only the components that are relevant to the present invention are shown. However, the invention is not limited to the embodiment shown in fig. 1.
The rf signal processing device 120 may receive an rf signal through an antenna and process the received rf signal to convert the received rf signal into a baseband signal to be processed by the baseband signal processing device 110, or receive a baseband signal from the baseband signal processing device 110 and convert the received baseband signal into an rf signal to be transmitted. The rf signal processing device 120 may include a plurality of hardware components for performing rf conversion. For example, the rf signal processing device 120 may include a power amplifier, a mixer, or other components. The baseband signal processing apparatus 110 may further process the baseband signal to obtain information or data transmitted by the wireless network. The baseband signal processing apparatus 110 may also include a plurality of hardware apparatuses to perform baseband signal processing. Baseband signal processing may include analog-to-digital conversion/digital-to-analog conversion, gain adjustment, modulation/demodulation, encoding/decoding, and so on. The processor 130 can control the operations of the baseband signal processing device 110 and the rf signal processing device 120 to perform the main processing of pseudo base station cell identification and maintain the necessary information of pseudo base station identification. According to an embodiment of the present invention, the processor 130 may execute the program code of the software module corresponding to the baseband signal processing apparatus 110 and/or the rf signal processing apparatus 120. When the program code is executed, the program code in combination with certain data in the data structures may also be considered a processor logic unit or a stack entity. Thus, a processor may be considered to comprise a plurality of processor logic units, each configured to perform a predetermined function or task corresponding to one or more software modules.
According to an embodiment of the present invention, the rf signal processing apparatus 120 and the baseband signal processing apparatus 110 can be regarded as a wireless communication module capable of communicating with a wireless network according to a Radio Access Technology (RAT) to provide wireless communication services. It is noted that, in some embodiments, the communication device 100 may be further extended to include more than one antenna or more than one wireless communication module, and thus the present invention is not limited to the embodiment shown in fig. 1.
According to an embodiment of the invention, the memory 140 may also be located outside the communication device 100 and coupled to the processor through a suitable connection, which is not limited by the invention. In addition, in some embodiments of the present invention, the processor may also be disposed in the baseband signal processing apparatus 110, or the communication apparatus 100 may further include another processor disposed in the baseband signal processing apparatus 110. The present invention is not limited to the architecture shown in fig. 1.
It should be noted that, for the sake of convenience, the following description will use a mobile terminal as one of the embodiments of the communication device 100, however, those skilled in the art can understand that the present invention is not limited thereto.
According to an embodiment of the present invention, the memory device 140 may store prior information for identifying the pseudo base station, where the prior information includes a pseudo base station cell list and a real cell list, and is used to record relevant information of one or more cells corresponding to the mobile terminal. According to an embodiment of the present invention, the pseudo base station cell list is used to record information of pseudo base station cells that the mobile terminal has identified. The real cell list is used for recording the information of the real cell in which the mobile terminal successfully resides. The cell information recorded in the second table may include cell identification, system information, and the like. For example, the Cell identifier included in the real Cell list and/or the pseudo Base Station Cell list may be, for example, a Cell identification Code (Cell ID), an Absolute Radio Frequency Channel Number (ARFCN), a Base Station Identification Code (BSIC), etc., and the system information included in the real Cell list and/or the pseudo Base Station Cell list may be, for example, a Radio LINK TIMEOUT value (Radio-LINK-TIMEOUT), a Cell reselection OFFSET (Cell _ reselection _ OFFSET), a minimum reception level (lerxv-ACCESS-MIN) allowed for ACCESS by a Mobile Station (MS), a maximum transmission power level (MS _ TXPWR _ MAX _ CCH) of a control Channel of the MS, etc. According to an embodiment of the present invention, the system information included in the real cell list and/or the pseudo base station cell list may also include an SI code stream (e.g., SI3, SI4, etc.) received by the MS, an MS average received level (RLA _ C), and the like. Those skilled in the art will appreciate that the above is merely an illustration of parameters of the real cell list and/or the pseudo base station cell list, and the specific determination may be made according to the actual communication environment, and the present invention is not limited thereto. The two tables may further include valid time of corresponding cell information, and the processor of the mobile terminal may delete information of cells whose expiration (time expired) is invalid in the two tables according to the valid time, and the like.
According to an embodiment of the invention, a pseudo base station identification table may also be maintained in memory device 140. The Information in the pseudo base station identification table includes partial Information Elements (IEs) or all IEs in cell System Information (SI), and the parameter Information value range of these Information elements is established according to the main characteristics of the System Information of the pseudo base station cell different from the normal base station cell. Further explanation regarding the pseudo base station identification table may be found in relation to the example of fig. 4 below.
Fig. 2 is a flow chart of a pre-judging of a pseudo base station cell according to an embodiment of the present invention, wherein fig. 2A is a flow chart of a pre-judging of a pseudo base station cell when there is a priori information of the pseudo base station cell according to an embodiment of the present invention. Fig. 2B is a flow chart of a pre-determination of a pseudo base station cell without prior information according to an embodiment of the present invention. In fig. 2A, the mobile terminal receives the system information of the target cell in step 210, and according to the stored prior information (pseudo base station cell list) of the pseudo base station cell, the processor of the mobile terminal determines whether the target cell exists in the pseudo base station cell list. If the pseudo base station cell list contains the target cell information, the mobile terminal determines that the target cell is the pseudo base station cell in step 260, does not reside, and updates the pseudo base station cell list in step 260; otherwise, the mobile terminal will determine whether the target cell exists in the real cell list in step 230. If the target cell exists in the real cell list, the mobile terminal compares the system information of the target cell with the system information of the identified cell in the real cell list in step 240, and determines whether the target cell is a pseudo base station according to the comparison result (step 250). Specifically, the mobile terminal may determine how much the target cell system information differs from the system information of the same identified cell in the real cell list in step 250 (e.g., how many different IEs exist for the target cell system information and the system information of the same identified cell in the real cell list, and compare the number of different IEs to a threshold). If there are more than N (or not less than N) different IEs (N is a natural number), the mobile terminal may determine that the target cell is a pseudo base station cell and cannot camp on the target cell in step 260, update a pseudo base station cell list, and store information of the target cell in the pseudo base station cell list; otherwise, the mobile terminal may determine the target cell as a real cell and attempt to camp on in step 270. It should be noted that the determination of whether the target cell is the pseudo base station cell by determining the number of IEs between the system information of the target cell and the system information of the same identified cell in the real cell list is only an example of the present invention, and on the basis of the contents described in the present specification, a person skilled in the art may also use other alternative ways to determine whether the target cell is the pseudo base station cell according to the comparison result between the system information of the target cell and the system information of the same identified cell in the real cell list, which is not limited by the present invention. If the mobile terminal determines that the target cell does not exist in the real cell list in step 230, go to fig. 2B to perform pseudo base station pre-determination on the target cell in a manner without prior information.
In fig. 2B, if there is no prior information of the target cell, the mobile terminal compares the system information of the target cell with information (e.g., parameters of the system information) in the pseudo base station identification table in step 330, and determines whether the target cell meets the pseudo base station determination criterion according to the comparison result (step 340). If it is determined in step 340 that the target cell meets the criterion of pseudo base station determination, the mobile terminal determines in step 350 that the target cell is a pseudo base station cell and cannot camp, updates a pseudo base station cell list, and stores system information of the target cell in the pseudo base station cell list; otherwise, the mobile terminal determines the target cell to be a non-pseudo base station cell in step 360 and attempts to camp on. The pseudo base station determination criterion in step 340 has multiple implementation manners, and according to multiple embodiments of the present invention, the pseudo base station determination criterion in step 340 may include:
criterion one is as follows: if the system information of the target cell and the information in the pseudo base station identification table have more (or not less) than M IEs with the same value range (M is a natural number), the target cell is judged to be the pseudo base station cell; or
Criterion two: respectively setting corresponding weights for part or all parameter information in the pseudo base station identification table, comparing the system information of the target cell with the part or all parameter information in the pseudo base station identification table, accumulating the weights corresponding to one or more parameters which simultaneously appear in the system information of the target cell and the pseudo base station identification table, and when the accumulated weight sum is greater than (or not less than) a threshold value T1(T1 is a real number), determining the target cell as the pseudo base station cell; or
Criterion three: and dividing part or all parameters in the pseudo base station identification table into different value range intervals in advance according to the value ranges of the parameters, and setting different weights for the different preset value range intervals. And when the system information of the target cell is compared with the part or all of the parameter information in the pseudo base station identification table, determining the corresponding weight according to the value range interval corresponding to the IE in the system information of the target cell in the corresponding parameter value range of the pseudo base station identification table. After weights corresponding to some or all IEs in the system information of the target cell are determined, the weights are accumulated, and when the accumulated weight sum is higher than (or not lower than) a threshold T2(T2 is a real number), the target cell is determined to be a pseudo base station cell.
For criterion two, for example, the weights of the parameter information IE1, IE2 and IE3 included in the pseudo base station identity table are w1, w2 and w3, respectively. Comparing the system information of the target cell with the parameter information in the pseudo base station identification table, wherein if the system information of the target cell comprises IE1, IE2 and IE3, the accumulation weight ws is (w1+ w2+ w 3); if the system information of the target cell includes IE1 and IE3 but does not include IE2, the cumulative weight sum ws is (w1+ w 3). Then, the accumulated weight sum ws is compared with a threshold T1, and when the accumulated weight sum ws is greater than (or not less than) the threshold T1, the target cell is determined to be a pseudo base station cell. The weight value and the threshold T1 may be real numbers, and may be set by a manufacturer, a service provider, etc. according to actual design requirements. It should be noted that the above description of the embodiments is only for illustration and the invention is not limited thereto.
According to an embodiment of the present invention, for criterion three, for example, the value ranges and weights of the parameter information IE1, IE2, IE1 and IE2 included in the pseudo base station identity table may be, for example, as shown in table 1 below, when the values of IE1 and IE2 included in the target cell system information are compared with the information of the pseudo base station identity table, it is determined that the weights corresponding to IE1 and IE2 are w11 and w22, respectively, and the accumulated weight sum ws is (w11+ w 22). Then, the accumulated weight sum ws is compared with a threshold T2, and when the accumulated weight sum ws is greater than (or not less than) the threshold T2, the target cell is determined to be a pseudo base station cell. The weight value and the threshold T2 may be real numbers, and may be set by a manufacturer, a service provider, etc. according to actual design requirements. It should be noted that the above description of the embodiments is only for illustration and the invention is not limited thereto.
TABLE 1
Please note that the flow chart of the pre-determination of the pseudo base station cell shown in fig. 2 is only an example, if the execution result is substantially the same, the execution does not need to be performed strictly according to the sequence of the steps shown in fig. 2, and those skilled in the art can split and combine the steps in fig. 2 or omit and exchange the sequence of some steps without departing from the spirit of the present invention, and the present invention is not limited thereto.
Taking the 2G pseudo base station as an example, after the pseudo base station sends a spam message to the mobile terminal, the mobile terminal is forced to leave the pseudo base station cell by the following two ways:
a) changing the LAC of the service cell, forcing the mobile terminal to perform location updating, and enabling the pseudo base station to refuse the current location updating request of the mobile terminal, so that the mobile terminal triggers network searching to leave the pseudo base station cell; or
b) Under the condition that the signal quality of a cell is normal, a large number of bad blocks (bad blocks) are sent on a Paging Channel (PCH), so that a mobile terminal is triggered to reselect and leaves a pseudo base station cell.
Therefore, the present invention further provides a method for identifying a pseudo base station cell according to various embodiments of the present invention, please refer to fig. 3. Fig. 3 is a flow chart of pseudo base station cell identification according to an embodiment of the invention. After the mobile terminal camps on the target cell in step 410, it determines in step 420: whether the short message sent by the network is received within T1 time after the mobile terminal resides in the target cell (T1 > 0). If not, the mobile terminal determines the target cell (i.e., the current serving cell) as a non-pseudo base station cell in step 460 and adds the serving cell to the real cell list. If the mobile terminal determines in step 420 that the short message is received within T1 time after camping on the target cell, it further determines in step 430: if the location update is triggered again within T2 time after receiving the short message and the network rejects the location update request, if yes, go to step 450, determine the serving cell as the pseudo base station cell, add the information of the serving cell into the pseudo base station cell list, and trigger the cell reselection or network searching process, so that the mobile terminal leaves the pseudo base station cell. If the determination result in step 430 is negative (i.e. the mobile terminal does not trigger location update within T2 time after receiving the short message, or the mobile terminal has triggered location update within T2 time after receiving the short message but the network corresponding to the serving cell does not reject the request for location update), then the mobile terminal further determines in step 440: and under the condition that the signal quality of the serving cell is not lower than a preset level, whether a large number of bad blocks are received on the control channel within T3 time after the short message is received. If yes, go to step 450, otherwise, go to step 460. According to various embodiments of the present invention, the Control Channel may include a PCH, a Broadcast Control Channel (BCCH), a Common Control Channel (CCCH), and the like. In step 450, the mobile terminal determines the serving cell as a pseudo base station cell, adds the information of the serving cell to a pseudo base station cell list to update the pseudo base station cell list, and triggers a cell reselection or network search process to leave the pseudo base station cell. In step 460, the mobile terminal identifies the serving cell as a non-pseudo base station cell and adds the serving cell to the real cell list to update the real cell list.
Note that In the determination of step 430 In this embodiment, the reasons for the network rejecting the Location update request may include #12Location Area not allowed, #13Roaming not allowed In this Location Area, #15No failed Cells In Location Area, and so on. It is noted that the location update rejection reasons mentioned in the present invention are not limited to the three mentioned herein due to the variability of the pseudo base station message.
In addition, in the determination of step 440 in the above embodiment, various implementation manners in the art may be adopted for monitoring the Signal Quality of the serving cell, for example, the Signal Quality may be characterized by parameters such as Received Signal Strength Indicator (RSSI), Received Signal Code Power (RSCP), Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), and the like. In step 440, when the signal quality of the serving cell is not lower than the predetermined level, the normal serving cell can ensure normal signal transceiving with the mobile terminal, and the pseudo base station cell forces the mobile terminal to reselect and leave the pseudo base station cell by sending a large number of bad blocks to the mobile terminal under the condition of having normal signal quality, so that it can determine whether the serving cell having normal signal quality is the pseudo base station cell by determining whether the serving cell has sent a large number of bad blocks to the mobile terminal. According to various embodiments of the present invention, the predetermined level of signal quality may be a preset empirical value of signal quality, or may be an average value of signal quality over a period of time, and the present invention is not limited thereto. In addition, according to various embodiments of the present invention, in step 440, when the serving cell has normal signal quality, the number of bad blocks received within a predetermined time T3 after receiving the short message may be determined by comparing the number of bad blocks with a threshold number K, where the threshold number K is a natural number and may be determined according to an empirical value or an actual implementation and/or design requirement. For example, when the number of bad blocks received by the mobile terminal on the control channel within T3 time after receiving the short message is greater than or equal to K, it is determined that a large number of bad blocks are received in step 440.
Please note that the flowchart of identifying the pseudo base station cell shown in fig. 3 is only an example, and if the execution result is substantially the same, the execution does not need to be performed strictly according to the sequence of the steps shown in fig. 3, and those skilled in the art may split, combine or omit some steps from fig. 3 and exchange the sequence without departing from the spirit of the present invention, and the present invention is not limited thereto.
Fig. 4 is a diagram of a pseudo base station identification table according to an embodiment of the invention. The parameters in the pseudo base station identity table may include part of the IE or all of the IE in the cell system information. As shown in fig. 4, the cell system information IE in the pseudo base station identification table may include: one or more of MSC Release (CR) (version number supported by mobile switching center), T3212 TIMEOUT value (T3212 timer duration), RADIO-LINK-TIMEOUT (RADIO LINK TIMEOUT), DTX Indicator (discontinuous transmission indication), Power control Indicator (PWRC) (Power control indication), Emergency Call (EC) (Emergency call), CELL _ reset _ OFFSET, System Information 2 Indicator (System Information 2 Indicator), GPRS Indicator (GPRS indication), SI2 Indicator (SI2 Indicator), RXLEV-ACCESS-MIN (minimum ACCESS received signal level), and MS-TXPWR-MAX-CCH (mobile station control channel maximum transmit Power). The value range of the parameter in the pseudo base station identification table can be obtained according to the cell system information of the existing pseudo base station. Note that the pseudo base station identification table is used for illustration only, and the pseudo base station identification table mentioned in the present invention is not limited to the mentioned contents due to the configurability of the pseudo base station system parameters. The table contents depend on the specific environment and the actual application.
Please note that, the steps of the method for pre-judging and identifying the pseudo base station cell shown in fig. 2-3 according to the embodiments of the present invention can be performed by the processor 130 included in the communication apparatus 100. However, according to another embodiment of the present invention, the steps of the method for prejudging and identifying a pseudo base station cell shown in fig. 2 to 3 according to various embodiments of the present invention may be performed by a processor externally connected to an external device of the communication device 100. According to another embodiment of the present invention, the present application further provides an apparatus for identifying a pseudo base station cell, as shown in fig. 5. Fig. 5 is a schematic diagram of an apparatus 500 for identifying a pseudo base station cell according to an embodiment of the invention. As shown in fig. 5, the pseudo base station cell identification device 500 may be externally connected to the communication device 100 through an interface (interface) of the communication device 100. According to an embodiment of the present invention, the pseudo base station cell identification apparatus 500 includes a processor 510, and the steps of the pseudo base station cell pre-judging and identifying method shown in fig. 2-3 according to various embodiments of the present invention can be executed by the processor 510, and the storage apparatus 140 of the communication apparatus 100 is used to store related information (e.g., pseudo base station cell list, real cell list, pseudo base station identification table, etc.). According to another embodiment of the present invention, the apparatus 500 for identifying a pseudo base station cell may further comprise a storage device 520 coupled to the processor 510. The steps of the method for prejudging and identifying a pseudo base station cell shown in fig. 2-3 according to various embodiments of the present invention may be executed by the processor 510 included in the pseudo base station cell identifying apparatus 500, and the storage 520 is used to store related information (e.g., pseudo base station cell list, real cell list, pseudo base station identification table, etc.). It should be noted that the above is only an example, and the invention is not limited thereto. The specific operation steps of the pseudo base station cell identification performed by the pseudo base station cell identification apparatus 500 may refer to the detailed descriptions in fig. 2 to fig. 4, and for brevity, are not described again here.
The pseudo base station Cell identification methods and apparatuses provided in various embodiments of the present invention may be applied to processes of network searching, Cell reselection, network controlled Cell Change, handover between different communication technologies, and the like of a communication apparatus, where the network controlled Cell Change may be, for example, a Cell Change operation performed according to a Cell Change Order (CCO) message, a redirection message, and the like sent by a network. Please note that this is for illustrative purposes only, and the present invention is not limited thereto.
By using the method and the device for identifying the pseudo base station cell, the occurrence that the mobile terminal resides in the pseudo base station can be effectively prevented and reduced, the probability that the mobile terminal receives fraud short messages and advertisement promotion is greatly reduced, and the method and the device are particularly important for improving user experience.
Although the present invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A pseudo base station cell identification method is applied to a communication device, and comprises the following steps:
when the communication device receives a short message within first preset time after residing in a target cell, judging whether position updating is triggered within second preset time after the communication device receives the short message, and whether a network corresponding to the target cell refuses the request of the position updating; and
and when the communication device triggers position updating again in the second preset time after receiving the short message and the network corresponding to the target cell rejects the request of the position updating, determining that the target cell is a pseudo base station cell.
2. The method of claim 1, further comprising:
if the location update is not triggered within a second predetermined time after the communication device receives the short message or the network corresponding to the target cell does not reject the request of the location update, determining whether the communication device receives bad blocks of which the number is greater than or equal to a fifth threshold value on a control channel within a third predetermined time after the communication device receives the short message or not under the condition that the signal quality of the target cell is not lower than a predetermined level; and
and when the communication device receives bad blocks of which the number is greater than or equal to a fifth threshold value on a control channel in third preset time after the short message is received, determining the target cell as a pseudo base station cell.
3. The method of identifying the pseudo base station cell according to claim 1 or 2, further comprising:
adding information of the target cell determined as the pseudo base station cell to a pseudo base station list.
4. The method of claim 1, further comprising:
and when the communication device does not receive the short message within the first preset time after residing in the target cell, determining that the target cell is a non-pseudo base station cell.
5. The method of claim 1, further comprising:
when the location update is not triggered within the second predetermined time after the communication device receives the short message or the network corresponding to the target cell does not reject the request for the location update, determining that the target cell is a non-pseudo base station cell if the communication device does not receive the bad blocks of which the number is greater than or equal to the fifth threshold on the control channel within the third predetermined time after the communication device receives the short message under the condition that the signal quality of the target cell is not lower than a predetermined level.
6. The method of claim 4 or 5, further comprising:
adding information of the target cell determined as the non-pseudo base station cell to a real cell list.
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| CN113747546A (en) * | 2021-08-20 | 2021-12-03 | 深圳市广和通无线股份有限公司 | Network access method, device, electronic equipment and storage medium |
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| CN107889112B (en) * | 2017-12-13 | 2019-11-26 | 维沃移动通信有限公司 | A kind of recognition methods of pseudo-base station and mobile terminal |
| CN107948982B (en) * | 2018-01-09 | 2021-04-23 | 北京小米移动软件有限公司 | Method and device for accessing base station |
| WO2020113477A1 (en) * | 2018-12-05 | 2020-06-11 | 深圳市欢太科技有限公司 | Pseudo base station recognition method and apparatus, and electronic device and computer-readable storage medium |
| CN112105027B (en) * | 2019-06-17 | 2022-12-13 | 华为技术有限公司 | Method and device for determining pseudo base station |
| CN112399418B (en) * | 2019-08-02 | 2022-10-18 | 华为技术有限公司 | Method and apparatus for communication |
| CN111278003B (en) * | 2020-01-21 | 2023-02-24 | 青岛海信移动通信技术股份有限公司 | Position updating processing method and mobile terminal |
| CN113068192B (en) * | 2021-03-17 | 2022-08-16 | Oppo广东移动通信有限公司 | Pseudo base station identification method and device, terminal and storage medium |
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| CN107426731A (en) | 2017-12-01 |
| TWI675602B (en) | 2019-10-21 |
| TW201742502A (en) | 2017-12-01 |
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