CN116249138A

CN116249138A - Method, device, equipment and computer readable storage medium for checking false cell

Info

Publication number: CN116249138A
Application number: CN202211739494.6A
Authority: CN
Inventors: 谢纪岭; 和王峰
Original assignee: Beijing Eswin Computing Technology Co Ltd; Guangzhou Quanshengwei Information Technology Co Ltd
Current assignee: Beijing Eswin Computing Technology Co Ltd; Guangzhou Quanshengwei Information Technology Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-09

Abstract

The application discloses a false cell checking method, device and equipment and a computer readable storage medium, and relates to the technical field of communication. The method is applied to the electronic equipment, and the electronic equipment is applied to the LTE system. The method comprises the following steps: acquiring a first MIB transmitted by a PBCH of a candidate cell, wherein the candidate cell corresponds to an LTE system; performing consistency check on the first MIB according to a reference MIB rule, wherein the reference MIB rule is used for indicating at least one reference MIB of PBCH transmission of a real cell, and the consistency check is used for checking whether the first MIB is consistent with the at least one reference MIB; and determining the candidate cell as a false cell based on the first MIB failing the consistency check. In the method, under the condition that the first MIB fails the consistency check, the candidate cell is determined to be a false cell, so that the false cell can be eliminated, and the electronic equipment is prevented from accessing the false cell.

Description

Method, device, equipment and computer readable storage medium for checking false cell

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, a device, and a computer readable storage medium for checking a false cell.

Background

In a long term evolution (long term evolution, LTE) system, if an electronic device in the LTE system does not store a cell list, the electronic device performs full-band scanning on a band range corresponding to the LTE system, and acquires a cell in the band range according to a scanned signal peak value. In the case where there are multiple cells in the frequency band, there may be overlapping of the signals of the multiple cells, resulting in false signal peaks among the scanned signal peaks. The cells acquired according to the false signal peaks are called as false cells, and therefore, a method for checking the false cells is required, so that if the acquired cells include the false cells, the acquired false cells can be eliminated, and the electronic equipment is prevented from accessing the false cells.

Disclosure of Invention

The application provides a method, a device, equipment and a computer readable storage medium for checking false cells. The technical proposal is as follows:

in one aspect, the present application provides a method for checking a false cell, where the method is applied to an electronic device, and the electronic device is applied to an LTE system, and the method includes:

acquiring a first master information block (master information block, MIB) transmitted by a physical broadcast channel (physical broadcast channel, PBCH) of a candidate cell, wherein the candidate cell corresponds to an LTE system;

performing consistency check on the first MIB according to a reference MIB rule, wherein the reference MIB rule is used for indicating at least one reference MIB of PBCH transmission of a real cell, and the consistency check is used for checking whether the first MIB is consistent with the at least one reference MIB;

and determining the candidate cell as a false cell based on the first MIB failing the consistency check.

In one possible implementation, the first MIB includes first downlink system bandwidth indication information, and the reference MIB rule includes at least one candidate downlink system bandwidth indication information; based on the first downlink system bandwidth indication information being different from each of the candidate downlink system bandwidth indication information, the first MIB fails the consistency check.

In one possible implementation, the first MIB includes first reserved bit field information and the reference MIB rule includes at least one candidate reserved bit field information; the first MIB fails the consistency check based on the first reserved bit field information being different from each of the candidate reserved bit field information.

In one possible implementation, the first MIB includes first radio frame number indication information, where the first radio frame number indication information is used to obtain a first radio frame number, and the method further includes: acquiring a second MIB transmitted by the PBCH of the candidate cell based on the first MIB through consistency check, wherein the second MIB comprises second radio frame number indication information which is used for acquiring a second radio frame number;

acquiring a first wireless frame number according to the first wireless frame number indication information, and acquiring a second wireless frame number according to the second wireless frame number indication information; acquiring a reference time interval corresponding to a frame number difference value of the first wireless frame number and the second wireless frame number;

and determining the candidate cell as a false cell based on the difference between the reference time interval and the acquisition time interval being greater than a time interval threshold, wherein the acquisition time interval is the time interval for acquiring the first MIB and the second MIB.

In one possible implementation, the PBCH of the candidate cell further transmits a cyclic redundancy check code (cyclic redundancy check, CRC), and before the first MIB is checked for consistency according to the reference MIB rules, further includes:

performing CRC check on the CRC of PBCH transmission of the candidate cell;

and performing a consistency check operation on the first MIB according to the reference MIB rule based on the CRC passing the CRC check.

In one possible implementation, the PBCH of the candidate cell also transmits a cyclic redundancy check, CRC, code, the method further comprising:

performing CRC check on CRC of PBCH transmission of the candidate cell based on the first MIB through consistency check;

and determining the candidate cell as a false cell based on the CRC failing to pass the CRC check.

In one possible implementation, the LTE system corresponds to a plurality of cells, and the candidate cell is a neighboring cell of a real cell of the plurality of cells, where the electronic device resides.

In another aspect, there is provided an apparatus for checking a false cell, the apparatus being applied to an electronic device, the electronic device being applied to an LTE system, the apparatus comprising:

the acquisition module is used for acquiring a first MIB transmitted by the PBCH of a candidate cell, wherein the candidate cell corresponds to the LTE system;

the checking module is used for checking consistency of the first MIB according to a reference MIB rule, wherein the reference MIB rule is used for indicating at least one reference MIB of PBCH transmission of a real cell, and the consistency check is used for checking whether the first MIB is consistent with the at least one reference MIB;

and the determining module is used for determining that the candidate cell is a false cell based on that the first MIB fails the consistency check.

In one possible implementation manner, the first MIB includes first radio frame number indication information, the first radio frame number indication information is used for acquiring a first radio frame number, the acquisition module is further used for acquiring a second MIB of PBCH transmission of the candidate cell based on the first MIB passing the consistency check, the second MIB includes second radio frame number indication information, and the second radio frame number indication information is used for acquiring a second radio frame number; acquiring a first wireless frame number according to the first wireless frame number indication information, and acquiring a second wireless frame number according to the second wireless frame number indication information; acquiring a reference time interval corresponding to a frame number difference value of the first wireless frame number and the second wireless frame number; and the determining module is further used for determining the candidate cell as a false cell based on the fact that the difference value between the reference time interval and the acquisition time interval is larger than a time interval threshold value, and the acquisition time interval is the time interval for acquiring the first MIB and the second MIB.

In one possible implementation, the PBCH of the candidate cell also transmits a CRC, and the checking module is further configured to perform a CRC check on the CRC transmitted by the PBCH of the candidate cell; and performing a consistency check operation on the first MIB according to the reference MIB rule based on the CRC passing the CRC check.

In one possible implementation, the PBCH of the candidate cell also transmits a Cyclic Redundancy Check (CRC), and the checking module is further configured to perform CRC checking on the CRC transmitted by the PBCH of the candidate cell based on the first MIB through a consistency check; and the determining module is further used for determining that the candidate cell is a false cell based on that the CRC fails the CRC check.

In another aspect, a computer device is provided, the computer device comprising a processor and a memory, the memory storing at least one program code, the at least one program code loaded and executed by the processor to cause the computer device to implement the method for checking for false cells of any of the above.

In another aspect, a computer readable storage medium is provided, in which at least one computer program is stored, where the at least one computer program is loaded and executed by a processor, so that the computer implements the method for checking a false cell according to any one of the above.

In another aspect, a computer program product or computer program is provided, the computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions to cause the computer device to perform any of the above-described methods of checking for false cells.

The technical scheme provided by the application at least brings the following beneficial effects:

in the method, the consistency check is carried out on the first MIB transmitted by the PBCH of the candidate cell according to the reference MIB rule, and the candidate cell is determined to be a false cell under the condition that the first MIB does not pass the consistency check, so that the false cell can be eliminated, and the electronic equipment is prevented from accessing the false cell.

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, and it is 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 is a schematic illustration of an implementation environment provided by embodiments of the present application;

fig. 2 is a flowchart of a method for checking a false cell according to an embodiment of the present application;

FIG. 3 is a flow chart of another method for checking false cells provided by an embodiment of the present application;

fig. 4 is a schematic structural diagram of a device for checking a false cell according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of another checking device for false cells according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

In an LTE system, a procedure for an electronic device to acquire a cell by performing full-band scanning generally includes: the scanning frequency band issued by a high layer is divided into small frequency bands with an interval of 100 kilohertz (kHz) at a physical layer, then signals are scanned on the central frequency points of the small frequency bands, and the possibility that cells exist on the frequency points is determined according to the intensity of the scanned signals. And then, the electronic equipment orders the possibility of the cells on each frequency point at the physical layer, reports the frequency band where the frequency point with the highest possibility of the cells exists in the plurality of frequency points to a high layer, and then the high layer instructs the electronic equipment to search the frequency band at the physical layer according to the reported result so as to acquire the cells.

The process of performing a cell search on the frequency band to obtain cells may include scanning signals on the frequency band and obtaining cells on the frequency band based on the scanned signal peaks. In the case of acquiring multiple cells, the electronic device may read broadcast information on the multiple cells and select a cell among the multiple cells to initiate random access for camping. When the electronic equipment is successfully accessed and resides in the cell, the adjacent cells with the same frequency and different frequencies as the cell need to be acquired so as to meet the mobility requirements of cell reselection and handover. The manner of acquiring the neighboring cells is similar to the above-mentioned process of acquiring the cells, and will not be described here again. Whether the cells are acquired in the sweep frequency stage or the stage of acquiring the adjacent cells, if a plurality of cells exist in the frequency band, signals of the plurality of cells may overlap, so that a false signal peak exists in the scanned signal peak, and further, the false cells are acquired based on the false signal peak.

The embodiment of the application provides a false cell checking method, which is used for checking acquired cells so as to avoid the electronic equipment from accessing the false cells. FIG. 1 is a schematic diagram of an implementation environment provided in an embodiment of the present application, as shown in FIG. 1, including: an electronic device 101 and a base station 102.

The electronic device 101 may be a terminal for accessing a cell or a scanner for acquiring a cell. The terminal may be at least one of a smart phone, a game console, a desktop computer, a tablet computer, an electronic book reader, an MP3 (moving picture experts group audio layer III, moving picture experts compression standard audio layer 3) player, an MP4 (moving picture experts group audio layer IV, moving picture experts compression standard audio layer 4) player, and a laptop portable computer.

The electronic device 101 is configured to perform the method for checking a false cell provided in the embodiment of the present application, and furthermore, the electronic device 101 may be applied to an LTE system. The base station 102 may be applied to an LTE system where the electronic device 101 is located, where the base station 102 is communicatively connected to the electronic device 101 through a network. The base station 102 may be an evolved node B (eNB). The implementation environment shown in fig. 1 may include a plurality of electronic devices 101 and/or a plurality of base stations 102, and only one electronic device 101 and one base station 102 are illustrated in fig. 1, which is not limited in this embodiment of the present application. Further, in the case where the implementation environment includes a plurality of electronic devices 101 and/or base stations 102, the types of the plurality of electronic devices 101 may be the same or different, and the types of the plurality of base stations 102 may be the same or different, which is not limited in this embodiment.

The method for checking the false cell provided by the embodiment of the application can be applied to an implementation environment shown in fig. 1, and the method is executed by electronic equipment, and the electronic equipment is applied to an LTE system. The flow chart of the method is shown in fig. 2, including but not limited to steps 201 to 203.

Step 201, a first MIB of PBCH transmission of a candidate cell is obtained, where the candidate cell corresponds to the LTE system.

In the embodiment of the present application, the candidate cell may be obtained by scanning a frequency band range corresponding to the LTE system, or may be obtained by scanning a part of frequency bands in the frequency band range corresponding to the LTE system. For example, the electronic device may only support operation in a part of the frequency bands in the frequency band range corresponding to the LTE system, and may only scan the part of the frequency bands to obtain the candidate cell.

The embodiments of the present application do not limit the manner in which the candidate cells are obtained by scanning the frequency band. For example, the electronic device scans signals in a reference range centered on a frequency point of a frequency band, detects a primary synchronization signal (primary synchronization, signal PSS) at a position of a peak of the scanned signals, detects a secondary synchronization signal (secondary synchronization signal, SSS) on the signals according to the PSS detected, and acquires candidate cells according to the PSS and SSS detected. The reference range may be set according to experience or actual requirements, which is not limited in the embodiments of the present application. The PSS detection of the signal until the candidate cell is acquired may refer to the following procedure.

Illustratively, the PSS occupies 62 of 72 subcarriers in the center of the signal in the frequency domain, and the received time-domain signal may be downsampled when the signal is PSS detected to reduce computational complexity, e.g., to a sampling rate of 1.92 samples million times per second (million samples per second, msps) or 0.96Msps. Further, in the LTE system, the PSS transmission period is 5 milliseconds (ms), so that the 5ms time-domain signal may be sampled, and the sampled data and the local and primary synchronization sequence numbers of the electronic device may be obtained

Performing correlation operation (correlation operation) on the three corresponding local PSSs to obtain the PSS position and +.>

The number of the main synchronization sequence is the number of the synchronization sequence corresponding to the PSS. The above procedure may correspond to the PSS detection shown in fig. 3.

After the PSS is obtained, frequency offset estimation may be performed according to the PSS, and the embodiment of the present application is not limited to a manner of performing frequency offset estimation according to the PSS. And carrying out frequency correction on the time domain signal according to the estimated frequency deviation, and further carrying out SSS detection on the time domain signal after the frequency correction. Illustratively, the position of the SSS in the frequency corrected time domain signal is calculated from the position of the PSS, and the SSS sequence is derived from the position of the SSS. And estimating the influence of the channel on the SSS sequence according to the PSS, and compensating the SSS sequence according to the estimated influence. Then, the compensated SSS sequence is numbered with 168 auxiliary synchronous sequences locally in the electronic equipment

Performing correlation operation on the corresponding sequence, wherein the maximum correlation value in a plurality of correlation values obtained by the correlation operation corresponds to

As a method for acquiring candidate cells>

The number of the auxiliary synchronization sequence is the number of the synchronization sequence corresponding to the SSS. The embodiments of the present application do not limit the way in which the frequency is corrected, the effect of estimating the channel on the SSS sequence from the PSS, and the way in which the SSS sequence is compensated. The above-described process may correspond to the frequency offset estimation and compensation, and SSS detection shown in fig. 3.

In the embodiments of the present application,

which may be used to represent an intra-group identification number (ID) of the candidate cell,

cell group ID, which can be used to indicate the cell group in which the candidate cell is located, is then based on +.>

And->

The ID of the candidate cell can be obtained, e.g. +.>

Illustratively, after obtaining the ID of the candidate cell, obtaining a cell-specific reference signal (cell-specific reference signal, CRS) of the candidate cell according to the ID of the candidate cell, performing channel estimation on the PBCH according to the CRS, and further obtaining the first MIB of PBCH transmission. The embodiment of the present application does not limit the manner of obtaining the CRS according to the ID of the candidate cell and performing channel estimation on the PBCH according to the CRS, where the first MIB may be obtained by performing channel equalization, demodulation, descrambling and decoding on the PBCH, and the embodiment of the present application does not limit the manner of performing channel equalization, demodulation, descrambling and decoding. The above procedure may correspond to PBCH demodulation shown in fig. 3.

The method provided by the embodiment of the application can be executed in a frequency sweeping stage or in a stage of acquiring the adjacent cells. In the case where the method is performed in the sweep phase, if the acquired candidate cell is a real cell, the candidate cell may be a cell to which the electronic device is to access and camp. In the case where the method is performed in the stage of acquiring the neighboring cells, the LTE system will correspond to a plurality of cells, the electronic device camping on a real cell among the plurality of cells, and the candidate cell is a neighboring cell to the real cell on which the electronic device camps.

Step 202, performing a consistency check on the first MIB according to a reference MIB rule, wherein the reference MIB rule is used for indicating at least one reference MIB of PBCH transmission of a real cell, and the consistency check is used for checking whether the first MIB is consistent with the at least one reference MIB.

The reference MIB rules are available according to the third generation partnership project (3rd generation partnership project,3GPP) technical specification (technical specification, TS) 36.331 protocol. That is, the reference MIB rule may include a reference MIB that the PBCH of the real cell needs to transmit, as specified by the 3gpp TS 36.331 protocol.

For example, the first MIB includes first downlink system bandwidth indication information, and the reference MIB rule includes at least one candidate downlink system bandwidth indication information. Then a consistency check is performed on the first MIB according to a reference MIB rule, including: determining whether the candidate downlink system bandwidth indication information which is the same as the first downlink system bandwidth indication information exists in the at least one candidate downlink system bandwidth indication information. Based on the difference between the first downlink system bandwidth indication information and each candidate downlink system bandwidth indication information, that is, the rule of the first MIB is different from that of the reference MIB, the first MIB fails the consistency check.

Illustratively, according to the 3GPP TS 36.331 protocol, the MIB includes 24 bits, and 3 bits of the 24 bits are used to indicate the downlink system bandwidth, i.e., the downlink system bandwidth indication information includes 3 bits. When the 3 bit value is 000, the downlink system bandwidth is equal to 6 Resource Blocks (RBs); when the 3 bit value is 001, the downlink system bandwidth is equal to 15RB; when the 3 bit value is 010, the downlink system bandwidth is equal to 25RB; when the 3 bit value is 011, the downlink system bandwidth is equal to 50RB; when the 3 bit value is 100, the downlink system bandwidth is equal to 75RB; when the 3 bit value is 101, the downlink system bandwidth is equal to 100RB. Wherein 1RB corresponds to 180kHz. That is, if the 3 bits included in the first MIB are 110 or 111, the first MIB fails the consistency check, and the candidate cell is a dummy cell.

For another example, the first MIB includes first reserved bit field information and the reference MIB rule includes at least one candidate reserved bit field information. Then a consistency check is performed on the first MIB according to a reference MIB rule, including: it is determined whether there is candidate reserved bit field information identical to the first reserved bit field information in the at least one candidate reserved bit field information. Based on the difference between the first reserved bit field information and each candidate reserved bit field information, that is, the rule of the first MIB is different from that of the reference MIB, the first MIB fails the consistency check.

Illustratively, according to the 3GPP TS 36.331 protocol, 10 bits of 24 bits included in the MIB are used as reserved bit fields, and 10 bits of the reserved bit fields are all 0. Then the first MIB fails the consistency check and the candidate cell is a dummy cell in case the 10-bit non-uniformity value comprised by the first MIB is 0.

In the embodiment of the application, the consistency check implemented based on the first downlink system bandwidth indication information and the consistency check implemented based on the first reserved bit field information may be performed in a superimposed manner. For example, in the case where the first MIB passes one of the two consistency checks, the other consistency check is performed again, and the execution order of the two consistency checks is not limited in the embodiments of the present application. The method has flexible mode of carrying out consistency check on the first MIB, and the consistency check on the first MIB is comprehensive under the condition of executing multiple consistency checks, so that the reliability of the candidate cell as a real cell is higher under the condition that the first MIB passes the multiple consistency checks. The above-described procedure of the consistency check may correspond to the MIB consistency check shown in fig. 3.

In step 203, it is determined that the candidate cell is a false cell based on the first MIB failing the consistency check.

In combination with the above-described step 202, in the case that the first MIB fails the consistency check, it may be determined that the candidate cell is a false cell. In one possible implementation manner, the first MIB further includes other information besides the first downlink bandwidth indication information and the first reserved bit field information, for example, the first MIB further includes first radio frame number indication information, where the first radio frame number indication information is used to obtain a first radio frame number. If the electronic device further acquires a second MIB transmitted by the PBCH of the candidate cell, the second MIB being used to acquire the second radio frame number, the electronic device may further check the candidate cell according to the first radio frame number indication information, the second radio frame number indication information, and a time interval for acquiring the first MIB and the second MIB, in case the first MIB passes the consistency check. The principle of the manner in which the electronic device obtains the second MIB is the same as that of the manner in which the electronic device obtains the first MIB, and will not be described herein again.

In this case, the electronic device obtains the first radio frame number according to the first radio frame number indication information, obtains the second radio frame number according to the second radio frame number indication information, and then obtains a reference time interval corresponding to a frame number difference value between the first radio frame number and the second radio frame number, and determines that the candidate cell is a false cell based on a difference value between the reference time interval and the obtaining time interval being greater than a time interval threshold, wherein the obtaining time interval is a time interval for obtaining the first MIB and the second MIB.

In the method provided by the embodiment of the present application, when the MIB is transmitted once every 10ms, the reference time interval may be equal to the product of the frame number difference and 10ms, and the difference between the reference time interval and the acquisition time interval is less than or equal to the time interval threshold, which may be regarded as approximately equal to the two. The specific value of the time interval threshold may be set according to experience or actual requirements, which is not limited in the embodiment of the present application. In the case that the first MIB passes the consistency check, by further determining whether the candidate cell is a false cell according to the second MIB received later, the checking effect on the false cell can be ensured. The above-described procedure may correspond to the reference time interval-based check shown in fig. 3.

Illustratively, the radio frame number comprises 10 bits according to the 3GPP TS 36.331 protocol. Wherein, 8 bits of 24 bits included in the MIB correspond to the upper 8 bits of the wireless frame number, and the lower 2 bits of the wireless frame number are embodied in the scrambling mode of the PBCH. That is, the lower 2 bits of the first radio frame number may be acquired when the first MIB is acquired through the descrambling PBCH, and the lower 2 bits of the second radio frame number may be acquired when the second MIB is acquired through the descrambling PBCH, the 8 bits corresponding to the first radio frame number included in the first MIB are the first frame number indication information, and the 8 bits corresponding to the second radio frame number included in the second MIB are the second frame number indication information, so that the first radio frame number and the second radio frame number can be acquired.

Because the range of the wireless frame number can be 0 to 1023, when the second wireless frame number is smaller than the first wireless frame number, the second wireless frame number can be added with 1024 times of integer, and then the difference between the second wireless frame number and the first wireless frame number is calculated. Illustratively, the electronic device counts the number of received MIBs, and the integer multiple may be determined according to the number of MIBs spaced between the first MIB and the second MIB.

Of course, the first MIB may further include other information than the first downlink system bandwidth indication information, the first reserved bit field information, and the first radio frame number indication information. For example, according to 3gpp TS 36.331 protocol, 1 bit is used to indicate physical hybrid automatic repeat request indicator channel (physical hybrid ARQ indicator channel, PHICH) time domain duration information among 24 bits included in MIB, wherein 0 is used to indicate normal duration and 1 is used to indicate extension duration (extended duration). Further, 2 bits of the 24 bits are used to indicate PHICH resource information, where 00, 01, 10, and 11 are used to indicate that the value of the parameter (Ng) of PHICH is 1/6,1/2,1,2, respectively.

In one possible implementation manner, the above manner of determining whether the candidate cell is a false cell may also be used in superposition with CRC checking, so as to further ensure the checking effect on the false cell.

Illustratively, the PBCH of the candidate cell also transmits a CRC, e.g., the PBCH transmits an information block including the first MIB and the CRC. The method may further comprise, prior to the consistency check of the first MIB in accordance with the reference MIB rules: performing CRC check on the CRC of PBCH transmission of the candidate cell; and performing a consistency check operation on the first MIB according to the reference MIB rule based on the CRC passing the CRC check. The embodiment of the application does not limit the CRC checking mode, and the CRC checking mode is only required to correspond to the type of CRC. For example, if the CRC of the PBCH transmission includes 16 bits, the CRC check mode is a check mode corresponding to CRC-16.

The process of CRC checking the CRC may also be performed after a consistency check, e.g. in case the PBCH of the candidate cell also transmits the CRC, the method further comprises: performing CRC check on CRC of PBCH transmission of the candidate cell based on the first MIB through consistency check; and determining the candidate cell as a false cell based on the CRC failing to pass the CRC check. The execution sequence of the CRC check and the consistency check is flexible.

In the method provided by the embodiment of the application, the consistency check is carried out on the first MIB transmitted by the PBCH of the candidate cell according to the rule of the reference MIB, and the candidate cell is determined to be a false cell under the condition that the first MIB does not pass the consistency check, so that the false cell can be eliminated, and the electronic equipment is prevented from being accessed into the false cell.

In addition, in the case of performing a plurality of consistency checks and CRC checks, the checking effect on the false cells is good. For example, the 16-bit CRC check has a false detection probability of 1/2 ¹⁶ =1/65536, meaning that the probability that the CRC of the PBCH transmission of a false cell can pass the CRC check is 1/65536. Further, the probability of the consistency check performed based on the first downlink system bandwidth indication information is 3/4, and the probability of the consistency check performed based on the first reserved bit field information is 1/1024. Thus, for a false cell, CRC check, consistency check performed based on the first downlink system bandwidth indication information, and consistency check performed based on the first reserved bit field informationThe probability of passing the test is 1.1176e-8 th power, that is, the test effect on the false cell is better.

Referring to fig. 4, an embodiment of the present application provides an apparatus for checking a false cell, where the apparatus is applied to an electronic device, and the electronic device is applied to an LTE system, and the apparatus includes:

an obtaining module 401, configured to obtain a first MIB of PBCH transmission of a candidate cell, where the candidate cell corresponds to the LTE system;

a checking module 402, configured to perform a consistency check on the first MIB according to a reference MIB rule, where the reference MIB rule is used to indicate at least one reference MIB of PBCH transmission of a real cell, and the consistency check is used to check whether the first MIB is consistent with the at least one reference MIB;

a determining module 403, configured to determine that the candidate cell is a false cell based on the first MIB failing the consistency check.

In a possible implementation manner, the first MIB includes first radio frame number indication information, where the first radio frame number indication information is used to obtain a first radio frame number, and the obtaining module 401 is further configured to obtain, based on the first MIB passing the consistency check, a second MIB of PBCH transmission of the candidate cell, where the second MIB includes second radio frame number indication information, where the second radio frame number indication information is used to obtain a second radio frame number; acquiring a first wireless frame number according to the first wireless frame number indication information, and acquiring a second wireless frame number according to the second wireless frame number indication information; acquiring a reference time interval corresponding to a frame number difference value of the first wireless frame number and the second wireless frame number; the determining module 403 is further configured to determine that the candidate cell is a false cell based on a difference between the reference time interval and the acquisition time interval being a time interval for acquiring the first MIB and the second MIB being greater than a time interval threshold.

In a possible implementation manner, the PBCH of the candidate cell also transmits a CRC, and the checking module 402 is further configured to perform a CRC check on the CRC transmitted by the PBCH of the candidate cell; and performing a consistency check operation on the first MIB according to the reference MIB rule based on the CRC passing the CRC check.

In a possible implementation manner, the PBCH of the candidate cell also transmits a CRC, and the checking module 402 is further configured to perform a CRC check on the CRC transmitted by the PBCH of the candidate cell based on the first MIB passing the consistency check; the determining module 403 is further configured to determine that the candidate cell is a false cell based on the CRC failing the CRC check.

In the device provided by the embodiment of the application, the consistency check is performed on the first MIB transmitted by the PBCH of the candidate cell according to the reference MIB rule, and the candidate cell is determined to be a false cell under the condition that the first MIB fails the consistency check, so that the false cell can be eliminated, and the electronic equipment is prevented from accessing the false cell.

It should be noted that, when the apparatus provided in the foregoing embodiment performs the functions thereof, only the division of the foregoing functional modules is used as an example, in practical application, the foregoing functional allocation may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules, so as to perform all or part of the functions described above. For example, as shown in fig. 5, the functions of the acquisition module 401 may be implemented by a PSS detection module 501, a frequency offset estimation and compensation module 502, an SSS detection module 503, and a PBCH demodulation module 504. The functions of the checking module 402 and the determining module 403 are implemented by the MIB consistency checking module 505 and the time interval checking module 506. In addition, the apparatus and the method embodiments provided in the foregoing embodiments belong to the same concept, and specific implementation processes of the apparatus and the method embodiments are detailed in the method embodiments and are not repeated herein.

Fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application, where the electronic device may have a relatively large difference due to different configurations or performances, and may include one or more processors 601 and one or more memories 602, where at least one computer program is stored in the one or more memories 602, and the at least one computer program is loaded and executed by the one or more processors 601, so that the electronic device implements the method for checking a false cell provided by the method embodiments shown in fig. 2 and fig. 3. The processor 601 may be a central processing unit (central processing unit, CPU). Of course, the electronic device may also have components such as a wired or wireless network interface, a keyboard, and an input/output interface, so as to perform input/output, and may further include other components for implementing the functions of the device, which are not described herein.

In an exemplary embodiment, a computer device is also provided, the computer device comprising a processor and a memory, the memory having at least one computer program stored therein. At least one computer program is loaded and executed by one or more processors to cause a computer device to implement any of the methods for checking for false cells described above.

In an exemplary embodiment, there is also provided a computer-readable storage medium having stored therein at least one computer program, the at least one computer program being loaded and executed by a processor of a computer device to cause the computer to implement any of the above-described methods of checking for false cells. The computer readable storage medium may be Read-Only Memory (ROM), random-access Memory (Random Access Memory, RAM), compact disc Read-Only Memory (CD-ROM), magnetic tape, floppy disk, optical data storage device, etc.

In an exemplary embodiment, a computer program product or computer program is also provided, the computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions to cause the computer device to perform any of the above-described methods of checking for false cells.

It should be noted that, information (including but not limited to user equipment information, user personal information, etc.), data (including but not limited to data for analysis, stored data, presented data, etc.), and signals referred to in this application are all authorized by the user or are fully authorized by the parties, and the collection, use, and processing of relevant data is required to comply with relevant laws and regulations and standards of relevant countries and regions. For example, calibration data referred to in this application are all acquired with sufficient authorization.

It should be understood that references herein to "a plurality" are to two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

The foregoing is illustrative of the present application and is not to be construed as limiting thereof, and any modifications, equivalent arrangements, improvements, etc. that fall within the principles of the present application are intended to be included within the scope of the present application.

Claims

1. A method for checking false cells, the method being applied to an electronic device, the electronic device being applied to a long term evolution, LTE, system, the method comprising:

acquiring a first master information block MIB transmitted by a Physical Broadcast Channel (PBCH) of a candidate cell, wherein the candidate cell corresponds to the LTE system;

performing a consistency check on the first MIB according to a reference MIB rule, wherein the reference MIB rule is used for indicating at least one reference MIB of PBCH transmission of a real cell, and the consistency check is used for checking whether the first MIB is consistent with the at least one reference MIB;

and determining that the candidate cell is a false cell based on the first MIB failing the consistency check.

2. The method of claim 1, wherein the first MIB comprises first downlink system bandwidth indication information, and wherein the reference MIB rule comprises at least one candidate downlink system bandwidth indication information; and based on the first downlink system bandwidth indication information and each candidate downlink system bandwidth indication information being different, the first MIB fails the consistency check.

3. The method of claim 1, wherein the first MIB comprises first reserved bit field information, and wherein the reference MIB rule comprises at least one candidate reserved bit field information; based on the first reserved bit field information being different from each candidate reserved bit field information, the first MIB fails the consistency check.

4. The method of claim 1, wherein the first MIB comprises first radio frame number indication information used to obtain a first radio frame number, the method further comprising:

acquiring a second MIB transmitted by the PBCH of the candidate cell based on the first MIB passing the consistency check, wherein the second MIB comprises second radio frame number indication information used for acquiring a second radio frame number;

acquiring the first wireless frame number according to the first wireless frame number indication information, and acquiring the second wireless frame number according to the second wireless frame number indication information; acquiring a reference time interval corresponding to a frame number difference value of the first wireless frame number and the second wireless frame number;

and determining that the candidate cell is a false cell based on the difference value between the reference time interval and the acquisition time interval being greater than a time interval threshold, wherein the acquisition time interval is a time interval for acquiring the first MIB and the second MIB.

5. The method according to any of claims 1-4, wherein the PBCH of the candidate cell further transmits a cyclic redundancy check, CRC, and wherein before the consistency check of the first MIB according to a reference MIB rule, further comprises:

performing CRC check on the CRC of the PBCH transmission of the candidate cell;

and executing the operation of performing consistency check on the first MIB according to a reference MIB rule based on the CRC passing the CRC check.

6. The method according to any of claims 1-4, wherein the PBCH of the candidate cell also transmits a cyclic redundancy check, CRC, the method further comprising:

performing CRC check on CRC transmitted by PBCH of the candidate cell based on the first MIB passing the consistency check;

and determining the candidate cell as a false cell based on the CRC failing the CRC check.

7. The method according to any of claims 1-4, wherein the LTE system corresponds to a plurality of cells, the candidate cell being a neighbor cell of a real cell of the plurality of cells, the electronic device camping on the real cell.

8. An apparatus for checking false cells, the apparatus being applied to an electronic device, the electronic device being applied to a long term evolution LTE system, the apparatus comprising:

an obtaining module, configured to obtain a first master information block MIB transmitted by a physical broadcast channel PBCH of a candidate cell, where the candidate cell corresponds to the LTE system;

a checking module, configured to perform a consistency check on the first MIB according to a reference MIB rule, where the reference MIB rule is used to indicate at least one reference MIB of PBCH transmission of a real cell, and the consistency check is used to check whether the first MIB is consistent with the at least one reference MIB;

9. A computer device, characterized in that it comprises a processor and a memory, in which at least one program code is stored, which is loaded and executed by the processor, in order to cause the computer device to carry out the method of checking false cells according to any of claims 1-7.

10. A computer readable storage medium, characterized in that at least one program code is stored in the computer readable storage medium, the at least one program code being loaded and executed by a processor to cause a computer to implement the method of checking false cells according to any of claims 1-7.