CN114222338B - Method for preventing terminal from residing under pseudo base station, computer equipment and storage medium - Google Patents

Method for preventing terminal from residing under pseudo base station, computer equipment and storage medium Download PDF

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Publication number
CN114222338B
CN114222338B CN202111657007.7A CN202111657007A CN114222338B CN 114222338 B CN114222338 B CN 114222338B CN 202111657007 A CN202111657007 A CN 202111657007A CN 114222338 B CN114222338 B CN 114222338B
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cell
information
terminal
neighbor
cells
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CN114222338A (en
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苏晓勃
丁国栋
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Xian Aeronautical University
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Xian Aeronautical University
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention belongs to the technical field of mobile communication, and discloses a method for preventing a terminal from residing under a pseudo base station, computer equipment and a storage medium, wherein the method for preventing the terminal from residing under the pseudo base station comprises the following steps: the network adds a cell global identifier in the neighbor cell information of the system information; the terminal reads the neighbor cell information of the system information in all cells meeting the residence threshold and the received signal quality, generates cell topology and performs cell selection; the terminal reads the neighbor cell information of the system information in all the cells which can meet the residence threshold and the received signal quality, generates the cell topology and reselects the existing cells. The method for preventing the terminal from residing under the pseudo base station prevents the mobile terminal from residing in the cell under the pseudo base station by perfecting the cell selection and reselection process of the terminal in the mobile communication system, and prevents the user information from being acquired or pushes the information to the user.

Description

Method for preventing terminal from residing under pseudo base station, computer equipment and storage medium
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a method, a computer device, and a storage medium for preventing a terminal from residing under a pseudo base station.
Background
At present, in a mobile communication system, a pseudo base station is often used to attract a mobile terminal to reside, and thus user privacy information is illegally acquired or information is illegally pushed to a user.
One common working mode of the pseudo base station is to disguise as a neighboring cell or a new cell of a current location cell in the mobile communication network, attract a terminal user to reside in a cell under the pseudo base station in a cell selection or reselection process by transmitting a strong pilot signal, and induce the terminal to initiate a location update process by pushing location information (such as location area, routing area, tracking area, etc.) different from that of an original terminal in system information, thereby acquiring user privacy information and pushing illegal information to the user.
The core of the terminal in cell residence is cell selection and reselection process, and the existing mobile communication system, no matter what technical scheme, the cell selection and reselection process can be basically divided into the following steps:
when the terminal performs cell residence, firstly, PLMN selection is performed, and when the UE selects one PLMN, one cell residence is selected in the PLMN.
When a cell is resident, firstly, cell searching is carried out, after the cell is searched, the UE carries out cell selection and reselection, and when the UE is in an idle state, the relevant parameters of the cell selection and reselection are mainly obtained through a system message; the UE may also be acquired through a connection release message of the RRC layer when it goes from a connected state to an idle state.
When the terminal starts up or re-enters the service area, a cell selection procedure is performed, which can be further divided into initial cell selection and cell selection based on stored information, the selection will vary according to different mobile communication systems, and in general, the cell with the best received signal strength (RSRP) or received signal quality (RSRQ) is selected.
When the terminal is in idle state, a cell reselection procedure occurs when it is necessary to reselect a cell, for example, because of mobility or some other reason, and the selected cell is typically the cell with the best received signal strength (RSRP) or received signal quality (RSRQ) among the neighbor cells notified by the network among the neighbor cells of the home cell notified by the network.
In the cell selection and reselection process, the above scheme prioritizes the received signal strength (RSRP) and the received signal quality (RSRQ) of the terminal in different cells, sorts the signals according to a certain rule, and selects a suitable cell residence.
According to the mobile communication system (the existing system) realized based on the thought, as long as the transmitting power of the pseudo base station is enough, the terminal can be completely attracted to the residence of the cell by being deployed in a specific area and disguised as a proper cell, and the terminal can be further induced to initiate the connection establishment process of the RRC layer by various methods, so that the acquisition of the privacy information of the terminal and the pushing of the information are realized.
Therefore, in the process of cell selection and reselection, in addition to considering physical layer signal factors such as received signal strength (RSRP) and received signal quality (RSRQ) of the terminal in different cells, it is necessary to enhance judgment on network topology, and select a suitable cell residence based on the network topology, so as to prevent the terminal from residing under an illegal cell, namely, a pseudo base station.
Through the above analysis, the problems and defects existing in the prior art are as follows: the existing mobile communication system has insufficient safety, and the situation that the user privacy information is illegally acquired or the information is illegally pushed to the user by using a pseudo base station cannot be avoided.
The difficulty of solving the problems and the defects is as follows: the solution of the above problem must be started from the wireless protocol process of the network and the bottom layer of the mobile terminal, and other schemes cannot completely achieve the intended purpose. The difficulty in solving this problem is therefore mainly the modification of the radio protocol parts of the network and mobile terminals, in particular of the protocol procedures and system information parameters of the cell-resident part.
The meaning of solving the problems and the defects is as follows: the solution of this problem can effectively avoid: the pseudo base station attracts the mobile terminal to reside in a mode of disguising as a neighboring cell or a new cell of the cell at the current position, so that privacy information of a user of the mobile terminal is illegally obtained, and illegal information is pushed to the user.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a method for preventing a terminal from residing under a pseudo base station.
The invention is realized in that a method for preventing a terminal from residing under a pseudo base station comprises the following steps:
the network adds a cell global identifier in the neighbor cell information of the system information; and if the global cell identifier is added in the adjacent cells of the system information broadcast by all cells at the network side, the terminal is facilitated to generate the cell topology taking the resident cell as a core, and whether the topology is abnormal or not is judged.
The terminal reads the neighbor cell information of the system information in all cells meeting the residence threshold and the received signal quality, generates cell topology and performs cell selection; the global identity of the cell has location information (such as a location area, a routing area and a tracking area), but if the camouflaged cell of the pseudo base station wants to acquire the terminal information, the terminal needs to be induced to initiate a location updating process through different location information from other adjacent cells, so that the terminal is helped to find that the terminal resides in an abnormal cell through topology judgment.
The terminal reads the neighbor cell information of the system information in all the cells which can meet the residence threshold and the received signal quality, generates the cell topology and reselects the existing cells. Generating a cell topology according to neighbor information in the cell selection and reselection process, adding judgment according to the topology, optimizing the cell selection and process, and preventing the terminal from residing in an abnormal cell.
Further, the cell global identity includes: location or routing or tracking areas, and other key identifications.
Further, the method for preventing the terminal from residing under the pseudo base station comprises the following steps:
step one, starting up or reentering a service area by a terminal; judging whether stored cell information exists or not, if so, carrying out initial cell search, and turning to the second step; if not, searching in the stored cell information preferentially, and turning to the second step;
step two, generating a to-be-resided cell list by reading cell information, generating cell topology based on neighbor cell information in all cell system information, and selecting optimal cell residency according to a residency threshold;
judging whether the network allows the residence of the cell, if so, the terminal selects the residence of the cell; otherwise, the cell is excluded from the cell list to be resided, and the step two is returned;
judging whether the terminal meets the condition of cell reselection in an idle state, and if so, selecting according to neighbor cell information in resident cell system information;
step five, the terminal reads the adjacent cell information of the system information in all the cells meeting the residence threshold and the received signal quality, generates the cell topology, selects the optimal residence of the cells, and reads the cell information;
step six, judging whether the network allows the residence of the cell, if so, the terminal selects the residence of the cell; otherwise, excluding the cell from the cell list to be camped; and returns to step five.
Further, the reading the cell information, generating a to-be-camped cell list, generating a cell topology based on neighbor cell information in all cell system information, and selecting an optimal cell to camp according to a camping threshold includes:
(1) Searching cells meeting a residence threshold, and reading system information of all cells meeting the residence threshold;
(2) Generating a quasi-resident cell list, and generating a cell topology based on neighbor cell information in system information of all cells; selecting an optimal cell residence according to a residence threshold;
(3) Judging whether the selected cell is an isolated cell or not; if yes, deleting the selected cell from the cell list to be resided, and returning to the step (2); if not, turning to the step (4);
(4) Judging whether the cell can cause the topology to have a one-way neighbor relation, if so, deleting the cell from a cell list to be resided, and returning to the step (2); if not, turning to the step (5);
(5) Judging whether the cell global representation of the cell is consistent with the cell global identifiers of the cells broadcast in other cell neighbor information in the topology, if so, deleting the cell from a cell list to be resided, and returning to the step (2); otherwise, turning to the third step.
Further, the cells capable of meeting the residence threshold are the cells with the received signal strength and the received signal quality reaching a certain threshold.
Further, the isolated cell is a cell in which no neighbor cell exists.
Further, the neighbor cell information includes: cell identification, frequency information, scrambling code information.
Further, the fifth step includes:
1) Selecting a cell designated in neighbor cell information of resident cell system information, and reading system information of all cells meeting a resident threshold;
2) Generating a list of cells to camp on; generating a cell topology based on neighbor cell information in the system information of all cells; selecting an optimal cell residence according to a residence threshold;
3) Judging whether the selected cell is in a one-way neighbor relation with the original resident cell, if so, deleting the cell from the to-be-resident cell list, and returning to the step 2); otherwise, turning to step 4);
4) Judging whether the cell global identification of the cell is consistent with the cell global identification of the cell broadcasted in the neighbor cell information in the original resident cell, if so, deleting the cell from the to-be-resident cell list, and returning to the step 2); otherwise, turning to step 5);
5) Judging whether the cell causes a unidirectional neighbor relation of topology, if so, deleting the cell from a cell list to be resided, and returning to the step 2); otherwise, turning to step 6);
6) Judging that the global cell identifier of the cell is consistent with the global cell identifiers of the cells broadcasted in other cell neighbor cell information in the topology, if so, deleting the cell from the cell list to be resided, and returning to the step 2); otherwise, turning to step six.
Further, the determining whether the selected cell is in a unidirectional neighbor relation with the original camping cell includes:
when the system information neighbor cell information of the original resident cell exists in the neighbor cell information of the original resident cell, but the neighbor cell information of the original resident cell does not exist in the system information of the original resident cell, the selected cell and the original resident cell are judged to be in a one-way neighbor cell relationship.
It is a further object of the present invention to provide a computer device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to perform the steps of the method of preventing a terminal from camping under a pseudo base station.
It is a further object of the present invention to provide a computer readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of the method of preventing a terminal from camping under a pseudo base station.
By combining all the technical schemes, the invention has the advantages and positive effects that: the invention prevents the mobile terminal from residing in the cell under the pseudo base station by perfecting the cell selection and reselection process of the terminal in the mobile communication system, and prevents the user information from being acquired or pushes the information to the user.
Drawings
Fig. 1 is a flowchart of a method for preventing a terminal from residing under a pseudo base station according to an embodiment of the present invention.
Fig. 2 is a flow chart of an improved cell selection provided by an embodiment of the present invention.
Fig. 3 is a flow chart of an improved cell reselection provided by an embodiment of the present invention.
Fig. 4 is a conventional cell selection flowchart provided by an embodiment of the present invention.
Fig. 5 is a conventional cell reselection flow chart provided by an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In view of the problems existing in the prior art, the present invention provides a method for preventing a terminal from residing under a pseudo base station, and the present invention is described in detail below with reference to the accompanying drawings.
The method for preventing the terminal from residing under the pseudo base station provided by the embodiment of the invention comprises the following steps:
the network adds a cell global identifier in the neighbor cell information of the system information;
the terminal reads the neighbor cell information of the system information in all cells meeting the residence threshold and the received signal quality, generates cell topology and performs cell selection;
the terminal reads the neighbor cell information of the system information in all the cells which can meet the residence threshold and the received signal quality, generates the cell topology and reselects the existing cells.
The cell global identifier provided by the embodiment of the invention comprises the following steps: location or routing or tracking areas, and other key identifications.
As shown in fig. 1, the method for preventing a terminal from residing under a pseudo base station according to the embodiment of the present invention includes the following steps:
s101, starting up or reentering a service area by a terminal; judging whether stored cell information exists or not, if so, carrying out initial cell search, and turning to step S102; if not, searching in the stored cell information preferentially, and turning to step S102;
s102, generating a to-be-resided cell list by reading cell information, generating cell topology based on neighbor cell information in all cell system information, and selecting optimal cell residency according to a residency threshold;
s103, judging whether the network allows the residence of the cell, if so, selecting the residence of the cell by the terminal; otherwise, the cell is excluded from the cell list to be resident, and the step S102 is returned;
s104, judging whether the terminal meets the condition of cell reselection in an idle state, and if so, selecting according to neighbor cell information in resident cell system information;
s105, the terminal reads the neighbor cell information of the system information in all cells meeting the residence threshold and the received signal quality, generates cell topology, selects the optimal residence of the cells, and reads the cell information;
s106, judging whether the network allows the residence of the cell, if so, selecting the residence of the cell by the terminal; otherwise, excluding the cell from the cell list to be camped; and returns to step S105.
As shown in fig. 2, reading cell information, generating a to-be-camped cell list, generating a cell topology based on neighbor cell information in system information of all cells, and selecting an optimal cell to camp according to a camping threshold includes:
(1) Searching cells meeting a residence threshold, and reading system information of all cells meeting the residence threshold;
(2) Generating a quasi-resident cell list, and generating a cell topology based on neighbor cell information in system information of all cells; selecting an optimal cell residence according to a residence threshold;
(3) Judging whether the selected cell is an isolated cell or not; if yes, deleting the selected cell from the cell list to be resided, and returning to the step (2); if not, turning to the step (4);
(4) Judging whether the cell can cause the topology to have a one-way neighbor relation, if so, deleting the cell from a cell list to be resided, and returning to the step (2); if not, turning to the step (5);
(5) Judging whether the cell global representation of the cell is consistent with the cell global identifiers of the cells broadcast in other cell neighbor information in the topology, if so, deleting the cell from a cell list to be resided, and returning to the step (2); otherwise, the process goes to step S103.
The cell which can meet the residence threshold, namely the cell with the received signal strength and the received signal quality reaching a certain threshold, is provided by the embodiment of the invention.
The isolated cell provided by the embodiment of the invention is a cell without a neighboring cell.
The neighbor cell information provided by the embodiment of the invention comprises the following steps: cell identification, frequency information, scrambling code information.
As shown in fig. 3, step S105 provided in the embodiment of the present invention includes:
1) Selecting a cell designated in neighbor cell information of resident cell system information, and reading system information of all cells meeting a resident threshold;
2) Generating a list of cells to camp on; generating a cell topology based on neighbor cell information in the system information of all cells; selecting an optimal cell residence according to a residence threshold;
3) Judging whether the selected cell is in a one-way neighbor relation with the original resident cell, if so, deleting the cell from the to-be-resident cell list, and returning to the step 2); otherwise, turning to step 4);
4) Judging whether the cell global identification of the cell is consistent with the cell global identification of the cell broadcasted in the neighbor cell information in the original resident cell, if so, deleting the cell from the to-be-resident cell list, and returning to the step 2); otherwise, turning to step 5);
5) Judging whether the cell causes a unidirectional neighbor relation of topology, if so, deleting the cell from a cell list to be resided, and returning to the step 2); otherwise, turning to step 6);
6) Judging that the global cell identifier of the cell is consistent with the global cell identifiers of the cells broadcasted in other cell neighbor cell information in the topology, if so, deleting the cell from the cell list to be resided, and returning to the step 2); otherwise, the process goes to step S106.
The judging whether the selected cell and the original resident cell are in a one-way neighbor relation comprises the following steps:
when the system information neighbor cell information of the original resident cell exists in the neighbor cell information of the original resident cell, but the neighbor cell information of the original resident cell does not exist in the system information of the original resident cell, the selected cell and the original resident cell are judged to be in a one-way neighbor cell relationship.
The technical scheme of the invention is further described below with reference to specific embodiments.
Example 1:
aiming at the defects of the prior art scheme, the main improvement points of the invention are as follows:
1. the network adds a global cell identifier (which is globally unique and contains a location area, a routing area, a tracking area, or other key identifiers, which are basically agreed in various existing mobile communication technical specifications) to the neighbor cell information of the system information, and the identifier is used in a specific use method of a cell selection and reselection process, as described below.
2. In cell selection, the terminal considers the network topology, and specifically includes the following points:
if the cell to which the terminal is to reside is in an isolated position in the network topology, the cell to which the terminal is to reside is excluded from the list of cells to which the terminal is to reside. The isolated position means that the cell has no neighbor cell.
The terminal reads the neighbor cell information of the system information in all cells which can meet the residence threshold (the received signal strength (RSRP) and the received signal quality (RSRQ) reach a certain threshold value), and generates the cell topology.
And judging the neighbor relation of the cells meeting the residence threshold, and if any cell exists, which leads to the existence of a unidirectional neighbor relation in the whole cell topology, eliminating the cell from the cell list to be resided.
And obtaining the cell global identifiers recorded in the neighbor cells of the cells meeting the residence threshold, and if the basic information of a certain cell (such as the cell identifiers, the frequency information, the scrambling code information and the like) is consistent in the neighbor cell information, but the cell global identifiers are different, eliminating the cell from the to-be-resident cell list.
Represented by a flow chart, the procedure of generating the list of cells to be camped in the existing cell selection procedure is improved with respect to the procedure of the identification 1 and the identification 2 in fig. 4.
3. In the process of cell reselection, the terminal needs to consider the network topology, and specifically includes the following points:
if the cell to which the terminal is to reside has only one-way adjacent relation with the original resident cell in the network topology, the one-way adjacent relation is excluded from the list of the to-be-resident cells, wherein the one-way adjacent relation refers to that the to-be-resident cell exists in the system information adjacent cell information of the original resident cell, but the adjacent cell information of the original resident cell does not exist in the system information of the to-be-resident cell.
For the to-be-camped cell, global information identifiers in the adjacent cell information of the to-be-camped cell and the original camped cell are required to be compared, and if the two are different, the terminal is required to exclude the to-be-camped cell from the list of the to-be-camped cell.
The terminal reads the neighbor cell information of the system information in all cells which can meet the residence threshold (the received signal strength (RSRP) and the received signal quality (RSRQ) reach a certain threshold value), and generates the cell topology.
And judging the neighbor relation of the cells meeting the residence threshold, and if any cell exists, which leads to the existence of a unidirectional neighbor relation of the whole cell topology, eliminating the cell from the cell list to be resided.
And obtaining the cell global identifiers recorded in the neighbor cells of the cells meeting the residence threshold, and if the basic information of a certain cell (such as the cell identifiers, the frequency information, the scrambling code information and the like) is consistent in the neighbor cell information, but the cell global identifiers are different, eliminating the cell from the to-be-resident cell list.
Represented by a flow chart, the procedure of generating the list of cells to camp on in the existing cell reselection procedure is improved with respect to the procedure of the identification 1 and the identification 2 in fig. 5.
Example 2:
taking the embodiment under LTE technology as an example, other systems are similar:
the 3gpp 36.331 (RRC) protocol was modified as follows:
the method comprises the following steps of adding a global cell identifier into common-frequency cell information carried in SIB 4:
the following description is added to the 3Gpp 36.401 protocol:
5.2.3 Cell Selectionprocess
5.2.3.1 Description
The UE shall use one ofthe following two cell selectionprocedures:
a)Initial Cell Selection
this procedure requires no prior knowledge of which RF channels are E-UTRA or NB-IoT carriers.the UE shall scan all RF channels in the E-UTRA bands according to its capabilities to find a suitable cell. For this cell, the UE needs to generate a list of cells to be camped and a cell topology according to neighbor cell information in the system information, and makes the following decisions:
1) If the cell to which the UE is camping is in an isolated position in the network topology, the cell is excluded from the camping cell list. The isolated position means that the cell has no neighbor cell.
2) If the cell topology has unidirectional neighbor relation due to the existence of a certain cell, the UE excludes the cell from the cell list to be camped.
3) If the basic information of a certain cell is consistent (such as cell identification, frequency information, scrambling code information and the like) but the global identifications recorded by different cells are different, the UE excludes the cell from the cell list to be camped.
If the selected cell is in the to-be-camped list, the UE selects the cell as the camped cell, otherwise, the UE performs the cell selection process again after excluding the cell. Once a suitable cell is found this cell shall be selected.
b)Stored Information Cell Selection
This procedure requires stored information of carrier frequencies and optionally also information on cell parameters, from previously received measurement control information elements or from previously detected cells the ue needs to generate a list of cells to be camped and a cell topology according to neighbor cell information in the cell system information, and makes the following decisions:
1) The selected cell is excluded from the list of cells to be camped if it has only one-way neighbor relation with the original cell to be camped. The unidirectional neighbor relation refers to that a selected cell exists in the system information neighbor information of the original resident cell, but the neighbor information of the original resident cell does not exist in the system information of the selected cell.
2) And comparing global information identifiers in the selected resident cell and the original resident cell neighbor information, and if the two information identifiers are different, eliminating the terminal from the to-be-resident cell list.
3) If the cell topology has unidirectional neighbor relation due to the existence of a certain cell, the UE excludes the cell from the cell list to be camped.
4) If the basic information of a certain cell is consistent (such as cell identification, frequency information, scrambling code information and the like) but the global identifications recorded by different cells are different, the UE excludes the cell from the cell list to be camped.
If the selected cell is in the to-be-camped list, the UE selects the cell as the camped cell, otherwise, the UE re-performs the cell reselection process after excluding the cell. Ifno suitable cell is found the Initial Cell Selectionprocedure shall be started.
It should be noted that the embodiments of the present invention can be realized in hardware, software, or a combination of software and hardware. The hardware portion may be implemented using dedicated logic; the software portions may be stored in a memory and executed by a suitable instruction execution system, such as a microprocessor or special purpose design hardware. Those of ordinary skill in the art will appreciate that the apparatus and methods described above may be implemented using computer executable instructions and/or embodied in processor control code, such as provided on a carrier medium such as a magnetic disk, CD or DVD-ROM, a programmable memory such as read only memory (firmware), or a data carrier such as an optical or electronic signal carrier. The device of the present invention and its modules may be implemented by hardware circuitry, such as very large scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, etc., or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., as well as software executed by various types of processors, or by a combination of the above hardware circuitry and software, such as firmware.
The foregoing is merely illustrative of specific embodiments of the present invention, and the scope of the invention is not limited thereto, but any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention will be apparent to those skilled in the art within the scope of the present invention.

Claims (6)

1. A method for preventing a terminal from camping under a pseudo base station, the method comprising:
the network adds a cell global identifier in the neighbor cell information of the system information;
the terminal reads the neighbor cell information of the system information in all cells meeting the residence threshold and the received signal quality, generates cell topology and performs cell selection;
the terminal reads the neighbor cell information of the system information in all cells meeting the residence threshold and the received signal quality, generates cell topology and reselects the existing cells;
the method for preventing the terminal from residing under the pseudo base station comprises the following steps:
step one, starting up or reentering a service area by a terminal; judging whether stored cell information exists or not, if so, searching in the stored cell information preferentially, and turning to the second step; if not, carrying out initial search of the cell, and turning to the second step;
step two, generating a to-be-resided cell list by reading cell information, generating cell topology based on neighbor cell information in all cell system information, and selecting optimal cell residency according to a residency threshold;
judging whether the network allows the residence of the cell, if so, the terminal selects the residence of the cell; otherwise, the cell is excluded from the cell list to be resided, and the step two is returned;
judging whether the terminal meets the condition of cell reselection in an idle state, and if so, selecting according to neighbor cell information in resident cell system information;
step five, the terminal reads the adjacent cell information of the system information in all the cells meeting the residence threshold and the received signal quality, generates the cell topology, selects the optimal residence of the cells, and reads the cell information;
step six, judging whether the network allows to reside in the cell, if so, the terminal selects the cell to reside in; otherwise, excluding the cell from the cell list to be camped; and returning to the fifth step;
the reading of the cell information, the generation of a to-be-resident cell list, the generation of cell topology based on the adjacent cell information in the system information of all the cells, and the selection of the optimal cell resident according to the resident threshold comprises the following steps:
(1) Searching cells meeting a residence threshold, and reading system information of all cells meeting the residence threshold;
(2) Generating a quasi-resident cell list, and generating a cell topology based on neighbor cell information in system information of all cells; selecting an optimal cell residence according to a residence threshold;
(3) Judging whether the selected cell is an isolated cell or not; if yes, deleting the selected cell from the cell list to be resided, and returning to the step (2); if not, turning to the step (4);
(4) Judging whether the cell can cause the topology to have a one-way neighbor relation, if so, deleting the cell from a cell list to be resided, and returning to the step (2); if not, turning to the step (5);
(5) Judging whether the cell global identification of the cell is consistent with the cell global identifications of the cells broadcast in neighbor cell information of other cells in the topology, if so, deleting the cell from a cell list to be resided, and returning to the step (2); otherwise, turning to a third step;
the isolated cell is a cell without a neighboring cell;
the fifth step comprises the following steps:
1) Selecting a cell designated in neighbor cell information of resident cell system information, and reading system information of all cells meeting a resident threshold;
2) Generating a list of cells to camp on; generating a cell topology based on neighbor cell information in the system information of all cells; selecting an optimal cell residence according to a residence threshold;
3) Judging whether the selected cell is in a one-way neighbor relation with the original resident cell, if so, deleting the cell from the to-be-resident cell list, and returning to the step 2); otherwise, turning to step 4);
4) Judging whether the cell global identification of the cell is consistent with the cell global identification of the cell broadcasted in the neighbor cell information in the original resident cell, if so, deleting the cell from the to-be-resident cell list, and returning to the step 2); otherwise, turning to step 5);
5) Judging whether the cell causes a unidirectional neighbor relation of topology, if so, deleting the cell from a cell list to be resided, and returning to the step 2); otherwise, turning to step 6);
6) Judging that the global cell identifier of the cell is consistent with the global cell identifiers of the cells broadcasted in other cell neighbor cell information in the topology, if so, deleting the cell from the cell list to be resided, and returning to the step 2); otherwise, turning to a step six;
the judging whether the selected cell is in a one-way neighbor relation with the original resident cell comprises the following steps:
when the system information neighbor cell information of the original resident cell exists in the neighbor cell information of the original resident cell, but the neighbor cell information of the original resident cell does not exist in the system information of the original resident cell, the selected cell and the original resident cell are judged to be in a one-way neighbor cell relationship.
2. The method of preventing a terminal from camping under a pseudo base station of claim 1, wherein the cell global identity comprises: location or routing or tracking areas, and other key identifications.
3. A method for preventing a terminal from camping under a pseudo base station as claimed in claim 1, wherein said cells capable of meeting a camping threshold are cells whose received signal strength and received signal quality reach a certain threshold.
4. The method for preventing a terminal from camping under a pseudo base station as claimed in claim 1, wherein said neighbor cell information comprises: cell identification, frequency information, scrambling code information.
5. A computer device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to perform the steps of the method of preventing a terminal from residing under a pseudo base station as claimed in any one of claims 1 to 4.
6. A computer readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of the method of preventing a terminal from camping under a pseudo base station as claimed in any one of claims 1 to 4.
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