CN111050325B

CN111050325B - Base station verification method and device

Info

Publication number: CN111050325B
Application number: CN201911192673.0A
Authority: CN
Inventors: 许珺; 周晶; 严斌峰; 栾帅
Original assignee: China United Network Communications Group Co Ltd
Current assignee: China United Network Communications Group Co Ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2023-04-07
Anticipated expiration: 2039-11-28
Also published as: CN111050325A

Abstract

The invention discloses a base station verification method and device, and belongs to the technical field of communication. The base station verification method comprises the following steps: the base station sends a request for obtaining base station information to a neighboring base station and receives first base station information returned by the neighboring base station, wherein the first base station information comprises a base station frequency point, a cell identification code and a position coordinate of the neighboring base station; the base station compares the first base station information with the second base station information, and generates a legal neighbor cell base station list according to the comparison result, wherein the second base station information is base station information of a neighbor cell base station prestored by the base station and comprises base station frequency points, cell identification codes and position coordinates of the neighbor cell base station prestored; and the base station sends a radio resource control connection release signal carrying a legal neighbor base station list to the terminal so that the terminal can realize communication connection based on the legal neighbor base station list. The base station verification method can verify the legality of the base station to be accessed when the terminal is switched from the 5G/4G/3G communication network to the 2G communication network, and eliminates the interference of 'pseudo base stations', thereby ensuring the network connection safety of the terminal.

Description

Base station verification method and device

Technical Field

The invention relates to the technical field of communication, in particular to a base station verification method and a base station verification device.

Background

Since the last 80 s, a new generation of revolutionary technology has appeared in the field of mobile communication every decade or so, and mobile communication technology has correspondingly developed from the first generation mobile communication technology to the fifth generation mobile communication technology now. However, the development and maturity of each generation of mobile communication technology must go through a long process. In this process, there is a possibility that the network coverage of the new generation mobile communication technology is smaller than that of the previous generation mobile communication technology which has been developed more maturely. Therefore, a scene that the terminal moves from an area covered by the 5G/4G/3G/2G communication network to an area covered by the 2G communication network only can occur. At this time, the terminal needs to switch from the 5G/4G/3G communication network to the 2G communication network to ensure that the terminal network is always in a connected state. But the terminal is vulnerable to a 'pseudo base station' when switching from the 5G/4G/3G communication network to the 2G communication network. This is because the handover of the communication network involves the handover of the communication base station, but the GSM (Global System for Mobile Communications) System used in 2G communication only allows the base station to authenticate the identity of the terminal, and the terminal cannot authenticate the identity of the base station. The pseudo base station sends the broadcast control signal which is the same as that of the normal base station to the terminal by utilizing the loophole of the one-way authentication, and establishes communication connection with the terminal with the requirement of switching to the 2G network by increasing the signal power of the broadcast control signal, thereby achieving the purpose of intercepting the communication message of the terminal or sending the false message and the harassment message to the terminal. Illegal personnel often use the pseudo base station to implement illegal behaviors such as fraud, advertisement sending and the like, which can bring potential safety hazards to the terminal user and influence the use experience of the terminal user.

Therefore, a base station verification method and a base station verification device are needed, which can verify the validity of a base station to be accessed when a terminal is switched from a 5G/4G/3G communication network to a 2G communication network, and eliminate the interference of a pseudo base station, thereby ensuring the network connection security of the terminal.

Disclosure of Invention

Therefore, the invention provides a base station verification method and a base station verification device, and aims to solve the problems that in the prior art, when a terminal is switched from a 5G/4G/3G communication network to a 2G communication network, the legality of a base station to be accessed cannot be verified, the terminal is easily threatened by a 'pseudo base station', potential safety hazards are brought to users, and the use experience of terminal users is influenced.

In order to achieve the above object, a first aspect of the present invention provides a base station authentication method, which is applied to a base station, and includes:

sending a request for acquiring base station information to a neighboring base station, wherein the neighboring base station comprises a second generation communication base station;

receiving first base station information returned by the neighboring base station, wherein the first base station information comprises a base station frequency point, a cell identification code and a position coordinate of the neighboring base station;

comparing the first base station information with second base station information, and generating a legal neighbor cell base station list according to a comparison result, wherein the second base station information is prestored base station information of a neighbor cell base station and comprises a base station frequency point, a cell identification code and a position coordinate of the prestored neighbor cell base station;

and sending a radio resource control connection release signal carrying the legal neighbor base station list to a terminal so that the terminal can realize communication connection based on the legal neighbor base station list.

Further, the comparing the first base station information with the second base station information, and generating a legal neighboring base station list according to a comparison result includes:

comparing the first base station information with the second base station information;

taking the neighboring cell base station with the first base station information and the second base station information completely consistent as a legal neighboring cell base station;

and generating the legal neighbor cell base station list based on the base station information of all the legal neighbor cell base stations, wherein the base station information of the legal neighbor cell base stations comprises base station frequency points, cell identification codes and position coordinates of the legal neighbor cell base stations.

Further, before sending the request for obtaining the base station information to the neighboring base station, the method further includes:

and receiving a communication system measurement signal sent by the terminal.

Further, the triggering condition for the terminal to send the communication system measurement signal includes that the signal quality of a serving cell is lower than a preset first threshold and/or the quality of an inter-system neighboring cell is higher than a preset second threshold, and the serving cell is a cell where the terminal is currently located; the inter-system neighboring cell refers to a target cell with a different wireless access technology from the serving cell.

In order to achieve the above object, a second aspect of the present invention provides a base station authentication method, which is applied to a terminal, and includes:

transmitting a communication system measurement signal to a base station;

receiving a radio resource control connection release signal returned by a base station, wherein the radio resource control connection release signal carries a legal adjacent cell base station list, the legal adjacent cell base station list is obtained by comparing first base station information and second base station information by the base station, the first base station information is base station information returned by an adjacent cell base station feedback base station request sent by the base station, the first base station information comprises a base station frequency point, a cell identification code and a position coordinate of the adjacent cell base station, the second base station information is base station information of an adjacent cell base station prestored by the base station, the second base station information comprises the base station frequency point, the cell identification code and the position coordinate of the adjacent cell base station prestored, and the adjacent cell base station comprises a second generation communication base station.

Further, after receiving the rrc connection release signal sent by the base station, the method further includes:

performing cell search based on the legal neighbor cell base station list in the radio resource control connection release signal, and obtaining cell system information;

and carrying out random access with a legal neighbor base station based on the cell system information to realize communication connection.

Further, the triggering condition for the terminal to send the communication system measurement signal to the base station includes that the quality of a serving cell signal is lower than a preset first threshold and/or the quality of an inter-system neighboring cell is higher than a preset second threshold, and the serving cell is a cell where the terminal is currently located; the inter-system neighboring cell refers to a target cell with a different wireless access technology from the serving cell.

Further, the request for obtaining base station information is sent to the neighboring base station by the base station after receiving the communication system measurement signal sent by the terminal.

In order to achieve the above object, a third aspect of the present invention provides a base station authentication apparatus, which is applied to a base station, the apparatus comprising:

a first sending module, configured to send a request for obtaining base station information to a neighboring base station, where the neighboring base station includes a second-generation communication base station;

a first receiving module, configured to receive first base station information returned by the neighboring base station, where the first base station information includes a base station frequency point, a cell identification code, and a position coordinate of the neighboring base station;

the comparison module is used for comparing the first base station information with second base station information, wherein the second base station information is prestored base station information of a neighboring base station and comprises a base station frequency point, a cell identification code and a position coordinate of the prestored neighboring base station;

the generating module is used for generating a legal neighbor cell base station list according to the comparison result;

the first sending module is further configured to send a radio resource control connection release signal carrying the legal neighbor base station list to a terminal, so that the terminal can implement communication connection based on the legal neighbor base station list.

In order to achieve the above object, a fourth aspect of the present invention provides a base station authentication apparatus, which is applied to a terminal, the apparatus comprising:

a second sending module, configured to send a communication system measurement signal to a base station;

the second receiving module is used for receiving a radio resource control connection release signal returned by the base station, wherein the radio resource control connection release signal carries a legal neighbor base station list, the legal neighbor base station list is obtained by comparing first base station information with second base station information, the first base station information is base station information returned by a request for obtaining base station information sent by the base station and fed back by the neighbor base station, the base station information comprises base station frequency points, cell identification codes and position coordinates of the neighbor base station, the second base station information is base station information of the neighbor base station prestored by the base station, the base station information comprises the base station frequency points, the cell identification codes and the position coordinates of the prestored neighbor base station, and the neighbor base station comprises a second-generation communication base station.

Further, the base station authentication apparatus further includes:

a cell search module, configured to perform cell search based on the legal neighbor cell base station list in the rrc connection release signal, and obtain cell system information;

and the random access module is used for carrying out random access with a legal neighbor base station based on the cell system information to realize communication connection.

The invention has the following advantages:

the base station sends a request for obtaining base station information to a neighboring base station, and receives first base station information returned by the neighboring base station, wherein the neighboring base station comprises a second generation communication base station, and the first base station information comprises a base station frequency point, a cell identification code and a position coordinate of the neighboring base station; the base station compares the received first base station information with prestored second base station information, and generates a legal neighbor cell base station list according to the comparison result, wherein the second base station information is the base station information of the neighbor cell base station prestored by the base station and comprises a base station frequency point, a cell identification code and a position coordinate of the neighbor cell base station prestored; and the base station sends a radio resource control connection release signal carrying a legal neighbor base station list to the terminal so that the terminal can realize communication connection based on the legal neighbor base station list.

The base station verification method can verify the legality of the base station to be accessed when the terminal is switched from the 5G/4G/3G communication network to the 2G communication network, and eliminates the interference of a pseudo base station, thereby ensuring the network connection safety of the terminal.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

Fig. 1 is a flowchart of a base station authentication method according to a first embodiment of the present invention;

fig. 2 is a flowchart of a base station authentication method according to a second embodiment of the present invention;

fig. 3 is a schematic block diagram of a base station authentication method according to a third embodiment of the present invention;

fig. 4 is a schematic block diagram of a base station authentication method according to a fourth embodiment of the present invention.

Detailed Description

The following describes in detail embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

The base station verification method and the device provided by the invention can verify the legality of the base station to be accessed when the terminal is switched from the 5G/4G/3G communication network to the 2G communication network, and eliminate the interference of a pseudo base station, thereby ensuring the network connection safety of the terminal.

Fig. 1 is a flowchart of a method for authenticating a base station, which can be applied to the base station according to a first embodiment. As shown in fig. 1, the base station authentication method may include the following steps:

step S101, sending a request for obtaining base station information to a neighboring base station.

The neighboring cell base station refers to a base station corresponding to a target cell when a terminal is switched to a network. Generally, a base station sends a request for obtaining base station information to a neighboring base station only when it is known that a terminal has a handover requirement, and obtains base station information of the neighboring base station through the request for obtaining base station information.

There are various reasons for the terminal to generate the handover requirement, and the conventional reasons include, but are not limited to, the signal quality of the serving cell is lower than a preset first threshold and/or the quality of the inter-system neighboring cell is higher than a preset second threshold. The service cell is a cell where the terminal is currently located; the inter-system neighbor cell refers to a target cell different from the serving cell in radio access technology. These causes trigger the terminal to generate a network handover request, which results in the terminal sending a measurement communication system signal to the base station. Accordingly, there are various ways for the base station to know that the terminal has a handover requirement, and one of the most common ways is to know the handover requirement through a measurement signal of the communication system transmitted by the terminal. Specifically, after receiving a signal of a measurement communication system sent by a terminal, a base station learns that the terminal has a handover requirement, and then sends a request for obtaining base station information to a neighboring base station to obtain base station information of the neighboring base station.

Suppose a terminal is in a 4G network connection state, and the cell in which the terminal is located is a serving cell.

For example, at a certain time, the serving cell signal quality of the terminal is lower than the preset first threshold (A1 event), which indicates that the current signal quality of the terminal is not good and the signal quality is already lower than the preset minimum signal quality, and the terminal generates a network handover request and sends a communication system measurement signal to the base station. After receiving a communication system measurement signal sent by a terminal, a base station learns that the terminal has a network switching requirement, and then sends a request for obtaining base station information to a neighboring base station so as to obtain the base station information of the neighboring base station.

For another example, at a certain time, the quality of the inter-system neighboring cell of the terminal is higher than the preset second threshold (B1 event), which means that the signal quality of the inter-system neighboring cell of the terminal is higher than the preset second threshold, and at this time, the terminal generates a network handover request, and sends a communication system measurement signal to the base station. After receiving a communication system measurement signal sent by a terminal, a base station learns that the terminal has a network switching requirement, and then sends a request for obtaining base station information to a neighboring base station so as to obtain the base station information of the neighboring base station.

For another example, at a certain time, the signal quality of the serving cell of the terminal is lower than a preset first threshold, and the quality of the inter-system neighbor cell is higher than a preset second threshold (B2 event), which means that the current signal quality of the terminal is not good and the signal quality is already lower than a preset minimum signal quality, and meanwhile, the signal quality of the inter-system neighbor cell is higher than the preset second threshold, at this time, the terminal generates a network handover request, and sends a communication system measurement signal to the base station. After receiving a communication system measurement signal sent by a terminal, a base station learns that the terminal has a network switching requirement, and then sends a request for obtaining base station information to a neighboring base station so as to obtain the base station information of the neighboring base station.

It should be noted that the neighboring base station includes, but is not limited to, a second generation communication base station. This is because in the 3G/4G/5G communication technology, a bidirectional authentication mode is used between the base station and the terminal (i.e., the base station can perform identity authentication on the terminal, and similarly, the terminal can also perform identity authentication on the base station to be accessed), whereas the 2G communication technology only allows the base station to perform unidirectional authentication on the terminal, but the terminal cannot perform identity authentication on the base station, which causes that when the terminal is switched from the 5G/4G/3G communication network to the 2G communication network, the second generation communication base station to be accessed cannot be authenticated, so that the interference of the "pseudo base station" is more likely to be caused, and the network connection security of the terminal cannot be effectively guaranteed. Therefore, the base station authentication method provided by the embodiment is particularly suitable for authenticating the validity of the second generation communication base station to be accessed when the terminal is switched from the 5G/4G/3G communication network to the 2G communication network.

Step S102, receiving first base station information returned by the adjacent base station.

The first base station information is a message which is fed back by the neighboring base station to the request for obtaining the base station information and is returned, and the first base station information includes, but is not limited to, a base station frequency point, a cell identification code and a position coordinate of the neighboring base station.

In step S101, the base station sends a request for obtaining base station information to its neighboring base station. And after receiving the base station information acquisition request sent by the base station, the neighbor cell base station returns the base station frequency point, the cell identification code and the position coordinate of the neighbor cell base station to the base station.

It should be noted that the request for obtaining base station information sent by the base station to the neighboring base station may be intercepted by the "pseudo base station," and after intercepting the request, the pseudo base station will forge a piece of base station information based on the request and return to the base station. Therefore, the first base station information received by the base station includes the neighbor base station information returned by the neighbor base station, and may also include the "pseudo base station" information sent by the "pseudo base station". After the base station receives the returned base station information, the base station information itself cannot directly judge which base station information is the information returned by the real neighboring base station and which base station information is the information sent by the 'pseudo base station'. Therefore, after receiving the first base station information, the base station needs to further discriminate whether the first base station information is true or false (i.e., step S103).

And step S103, comparing the first base station information with the second base station information, and generating a legal neighbor base station list according to the comparison result.

The second base station information is base station information of a neighboring base station prestored by the base station, and includes but is not limited to prestoring a base station frequency point, a cell identification code and a position coordinate of the neighboring base station. Specifically, the base station acquires the base station information of the neighboring base stations from the data source side with higher reliability and credibility, configures the base station information of the neighboring base stations in advance according to the use requirements to form second base station information, and then stores the second base station information in the corresponding physical address for standby. The reason why the first base station information and the second base station information need to be compared is that the first base station information may include the "pseudo base station" information transmitted by the "pseudo base station". If the terminal does not discriminate the first base station information, if the cell search and random access process is directly carried out based on the first base station information, the connection with the pseudo base station is possibly established, and then the pseudo base station intercepts the communication message of the terminal or sends the false message and the harassment message to the terminal through the pseudo base station, and finally the network security of the terminal is threatened. Therefore, after the base station receives the first base station information, the base station needs to further discriminate whether the first base station information is true or false. In this embodiment, the base station compares the received first base station information with the prestored second base station information with higher reliability and reliability, and generates a corresponding legal neighbor base station list according to the comparison result, so that the terminal performs communication connection based on the legal neighbor base station list.

In one embodiment, comparing the first base station information with the second base station information, and generating a legal neighbor base station list according to the comparison result includes:

comparing the similarities and differences between the first base station information and the second base station information;

and generating a legal neighbor cell base station list based on the base station information of all legal neighbor cell base stations, wherein the base station information of the legal neighbor cell base stations comprises but is not limited to base station frequency points, cell identification codes and position coordinates of the legal neighbor cell base stations.

For example, the information of the first base station that a certain base station receives and returns from the neighboring base station is shown in table 1.

TABLE 1

The second base station information pre-stored by the base station is shown in table 2.

TABLE 2

It should be noted that the base station information in table 1 includes base station information returned by the neighboring base station, and may also include "pseudo base station" information sent by the "pseudo base station". Therefore, the contents in table 1 and table 2 are compared, and a corresponding legal neighbor base station list is generated according to the comparison result.

The specific process is as follows:

first, the base station information of base station No. 1 in table 1 is compared with the base station information in table 2. The base station information of base station No. 1 in table 1 and base station No. i in table 2 are most similar and compared. Specifically, the base station frequency point information of the base station No. 1 in table 1 and the base station No. i in table 2 is consistent with the cell identification code, but the position coordinates of the base station No. 1 and the cell identification code are inconsistent, so that the base station No. 1 does not belong to a legal neighbor base station;

next, the base station information of base station No. 2 in table 1 is compared with the base station information in table 2. The base station information of base station No. 2 in table 1 and base station No. ii in table 2 are most similar and the two are compared. Specifically, the base station frequency point information, the cell identification code and the position coordinate of the base station No. 2 in table 1 and the base station No. ii in table 2 are completely consistent, so the base station No. 2 is a legal neighbor base station;

third, the base station information of base station No. 3 in table 1 is compared with the base station information in table 2. Base station information of base station No. 3 in table 1 and base station No. iii in table 2 are most similar and the two are compared. Specifically, the position coordinates of the base station No. 3 in table 1 and the base station No. iii in table 2 are consistent, but the frequency point information and the cell identification code are inconsistent, so the base station No. 3 does not belong to a legal neighbor base station;

fourth, the base station information of base station No. 4 in table 1 is compared with the base station information in table 2. The base station information of base station No. 4 in table 1 and base station No. iv in table 2 are most similar and the two are compared. Specifically, the base station frequency point information, the cell identification code and the position coordinate of the base station No. 4 in table 1 and the base station No. iv in table 2 are completely consistent, so the base station No. 4 is also a legal neighbor base station;

finally, the base station information of base station No. 5 in table 1 is compared with the base station information in table 2. Through comparison, the base station frequency point information, the cell identification code and the position coordinates of the No. 5 base station in the table 1 and all the base stations in the table 2 are inconsistent, so that the No. 5 base station does not belong to a legal adjacent cell base station.

In summary, the base station No. 2 in the first base station information (corresponding to the base station No. ii in the second base station information) and the base station No. 4 in the first base station information (corresponding to the base station No. iv in the second base station information) are legal neighboring base stations.

And listing base station information corresponding to the No. 2 base station in the first base station information or the No. II base station in the second base station information and the No. 4 base station in the first base station information or the No. IV base station in the second base station information into a table to form a legal neighbor base station list, wherein the table is shown in a table 3.

TABLE 3

Step S104, sending a radio resource control connection release signal carrying a legal neighbor base station list to the terminal so that the terminal can realize communication connection based on the legal neighbor base station list.

The rrc connection release signal is a signaling for causing the terminal to release the radio resource in the connected state and to connect to another radio resource. The radio resource control connection release signal carries the legal neighbor base station list generated in step S103. The terminal receives a wireless resource control connection release signal sent by the base station, releases the infinite resource in the connection state, performs cell search through the legal neighbor cell base station list to obtain cell system information, performs random access based on the cell system information, and finally realizes new communication connection.

Fig. 2 is a flowchart of a base station authentication method provided in a second embodiment, which may be used for a terminal. As shown in fig. 2, the base station authentication method may include the steps of:

step S201, a communication system measurement signal is transmitted to a base station.

The communication system measurement signal is sent to the base station when the terminal has a network switching requirement. There are various reasons for the terminal to generate the network handover requirement, and generally, the conditions for the terminal to generate the network handover requirement and trigger the terminal to send the communication system measurement signal to the base station include, but are not limited to: the signal quality of the service cell is lower than a preset first threshold and/or the quality of the inter-system adjacent cell is higher than a preset second threshold. The service cell is the cell where the terminal is currently located, and the inter-system neighboring cell refers to a target cell with a different wireless access technology from that of the service cell.

For the base station, after receiving the communication system measurement signal sent by the terminal, the base station learns that the terminal has a network switching requirement, and sends a request for obtaining base station information to the neighboring base station. After receiving a request for acquiring base station information sent by the base station, the neighboring base station feeds back first base station information to the base station, wherein the first base station information includes, but is not limited to, a base station frequency point, a cell identification code and a position coordinate of the neighboring base station. And after receiving the first base station information, the base station compares the first base station information with the pre-stored second base station information, and takes the adjacent base station with the first base station information and the second base station information completely consistent as a legal adjacent base station. The second base station information is pre-stored base station information of the neighboring base station, and includes but is not limited to pre-storing a base station frequency point, a cell identification code and a position coordinate of the neighboring base station. The base station generates a legal neighbor cell base station list based on the base station information of all legal neighbor cell base stations, and sends a radio resource control connection release signal carrying the legal neighbor cell base station list to the terminal so that the terminal can realize communication connection based on the legal neighbor cell base station list. The base station information of the legal neighbor base station includes, but is not limited to, a base station frequency point, a cell identification code and a position coordinate of the legal neighbor base station. For the specific implementation of the foregoing process, reference may be made to the description of relevant contents in the embodiment corresponding to fig. 1, and details are not repeated here.

Step S202, receiving a radio resource control connection release signal returned by the base station, wherein the radio resource control connection release signal carries a legal neighbor base station list.

After the base station receives the communication system measurement signal sent by the terminal through step S201, it learns that the terminal has a network switching requirement, generates a radio resource control connection release signal carrying a legal neighbor base station list and sends the radio resource control connection release signal to the terminal, so that the terminal releases radio resources in a connection state, and establishes a new communication connection based on the legal neighbor base station list.

The legal neighbor cell base station list is obtained by the base station through comparing first base station information and second base station information, wherein the first base station information is base station information which is fed back by the neighbor cell base station to the base station and is returned by a base station information obtaining request and comprises a base station frequency point, a cell identification code and a position coordinate of the neighbor cell base station, the second base station information is base station information of the neighbor cell base station which is prestored by the base station and comprises a base station frequency point, a cell identification code and a position coordinate of the neighbor cell base station which is prestored by the base station, and the neighbor cell base station comprises a second-generation communication base station. The specific steps of obtaining the legal neighbor cell base station list by comparing the first base station information and the second base station information comprise:

the base station compares the similarities and the differences of the first base station information and the second base station information;

After the terminal receives the rrc connection release signal transmitted by the base station, the method further includes:

performing cell search based on a legal neighbor cell base station list in a radio resource control connection release signal, and obtaining cell system information, wherein the cell system information comprises but is not limited to cell sending bandwidth, cell identification codes and radio frame synchronization information;

and carrying out random access with a legal neighbor base station based on the cell system information so as to realize communication connection of the terminal.

Fig. 3 is a schematic block diagram of a base station authentication apparatus provided in a third embodiment, which can be used in a base station. As shown in fig. 3, the base station authentication apparatus includes: a first sending module 310, a first receiving module 320, a comparing module 330, and a generating module 340.

A first sending module 310, configured to send a request for obtaining base station information to a neighboring base station.

The neighboring cell base station refers to a base station corresponding to a target cell when a terminal is switched to a network. In general, a base station sends a request for obtaining base station information to a neighboring base station only when it is known that a terminal has a handover requirement, and obtains base station information of the neighboring base station through the request for obtaining base station information.

There are various reasons for the terminal to generate the handover requirement, and the conventional reasons include, but are not limited to, the signal quality of the serving cell is lower than a preset first threshold and/or the quality of the inter-system neighbor is higher than a preset second threshold. The service cell is a cell where the terminal is currently located; the inter-system neighbor cell refers to a target cell with a different wireless access technology from the serving cell. These causes trigger the terminal to generate a network handover request, which results in the terminal sending a measurement communication system signal to the base station. Accordingly, there are various ways for the base station to know that the terminal has a handover requirement, and one of the most common ways is to know the handover requirement through a measurement signal of the communication system transmitted by the terminal. Specifically, after receiving a signal of a measurement communication system sent by a terminal, the base station learns that the terminal has a handover requirement, and then sends a request for obtaining base station information to the neighboring base station through the first sending module 310, so as to obtain the base station information of the neighboring base station.

For example, at a certain time, the serving cell signal quality of the terminal is lower than a preset first threshold (A1 event), which indicates that the current signal quality of the terminal is poor and the signal quality is lower than a preset minimum signal quality, and at this time, the terminal generates a network handover request and sends a communication system measurement signal to the base station. After receiving a communication system measurement signal sent by a terminal, a base station learns that the terminal has a network handover requirement, and then sends a request for obtaining base station information to a neighboring base station through a first sending module 310, so as to obtain base station information of the neighboring base station.

For another example, at a certain time, the quality of the inter-system neighboring cell of the terminal is higher than the preset second threshold (B1 event), which means that the signal quality of the inter-system neighboring cell of the terminal is higher than the preset second threshold, and at this time, the terminal generates a network switching requirement, and sends a communication system measurement signal to the base station. After receiving a communication system measurement signal sent by a terminal, a base station learns that the terminal has a network handover requirement, and then sends a request for obtaining base station information to a neighboring base station through a first sending module 310, so as to obtain base station information of the neighboring base station.

For another example, at a certain time, the signal quality of the serving cell of the terminal is lower than a preset first threshold, and the quality of the inter-system neighbor cell is higher than a preset second threshold (B2 event), which means that the current signal quality of the terminal is not good and the signal quality is already lower than a preset minimum signal quality, and meanwhile, the signal quality of the inter-system neighbor cell is higher than the preset second threshold, at this time, the terminal generates a network handover request, and sends a communication system measurement signal to the base station. After receiving a communication system measurement signal sent by a terminal, a base station learns that the terminal has a network handover requirement, and then sends a request for obtaining base station information to a neighboring base station through a first sending module 310, so as to obtain base station information of the neighboring base station.

It should be noted that the neighboring base station includes, but is not limited to, a second generation communication base station. This is because in the 3G/4G/5G communication technology, a bidirectional authentication mode is used between the base station and the terminal (i.e., the base station can perform identity authentication on the terminal, and similarly, the terminal can also perform identity authentication on the base station to be accessed), whereas the 2G communication technology only allows the base station to perform unidirectional authentication on the terminal, but the terminal cannot perform identity authentication on the base station, which results in that when the terminal is switched from the 5G/4G/3G communication network to the 2G communication network, the terminal cannot perform authentication on the second-generation communication base station to be accessed, and thus is more susceptible to interference of the "pseudo base station", and network connection security of the terminal cannot be effectively guaranteed. Therefore, the base station authentication device provided by the embodiment is particularly suitable for verifying the validity of the second generation communication base station to be accessed when the terminal is switched from the 5G/4G/3G communication network to the 2G communication network.

A first receiving module 320, configured to receive first base station information returned by a neighboring base station.

The base station sends a request for obtaining base station information to its neighboring base station through the first sending module 310. After receiving the request for obtaining the base station information sent by the base station, the neighboring base station sends back the base station frequency point, the cell identification code and the position coordinate of the neighboring base station itself, and receives the base station information (i.e., the first base station information) returned by the neighboring base station through the first receiving module 320 of the base station.

It should be noted that the request for obtaining base station information sent by the base station to the neighboring base station may be intercepted by a "pseudo base station," and after intercepting the request, the "pseudo base station" may forge a piece of base station information based on the request and send the forged piece of base station information to the first receiving module 320 of the base station. Therefore, the first base station information received by the first receiving module 320 of the base station includes the neighboring base station information returned by the neighboring base station, and may also include the "pseudo base station" information sent by the "pseudo base station". The base station information itself received by the first receiving module 320 cannot directly determine which base station information is the information returned by the real neighboring base station, and which base station information is the information sent by the "pseudo base station". Therefore, after the first receiving module 320 receives the first base station information, the base station needs to further discriminate whether the first base station information is true or false (completed by the comparing module 330 and the generating module 340).

A comparing module 330, configured to compare the first base station information with the second base station information.

The second base station information is base station information of a neighboring base station prestored by the base station, and includes but is not limited to prestored base station frequency points, cell identification codes and position coordinates of the neighboring base station. Specifically, the base station acquires the base station information of the neighboring base stations from the data source side with higher reliability and credibility, configures the base station information of the neighboring base stations in advance according to the use requirements to form second base station information, and then stores the second base station information in the corresponding physical address for standby. The comparison module 330 is required to compare the first base station information with the second base station information because the first base station information may include the "pseudo base station" information transmitted by the "pseudo base station". If the terminal does not discriminate the first base station information, if the cell search and random access process is directly carried out based on the first base station information, the connection with the pseudo base station is possibly established, and then the pseudo base station intercepts the communication message of the terminal or sends the false message and the harassment message to the terminal through the pseudo base station, and finally the network security of the terminal is threatened. Therefore, after the first receiving module 320 of the base station receives the first base station information, the base station needs to further discriminate whether the first base station information is true or false. In this embodiment, the comparison module compares the received first base station information with the pre-stored second base station information with higher reliability and reliability, and obtains a corresponding comparison result.

For example, the information of the first base station that a certain base station receives and returns from the neighboring base station is shown in table 4.

TABLE 4

The second base station information pre-stored by the base station is shown in table 5.

TABLE 5

It should be noted that the base station information in table 4 includes base station information returned by the neighboring base station, and may also include "pseudo base station" information sent by the "pseudo base station". The comparison module 330 compares tables 4 and 5 and obtains the corresponding comparison result as follows:

first, the base station information of base station No. 1 in table 4 is compared with the base station information in table 5. The base station information of base station No. 1 in table 4 and base station No. i in table 5 are most similar and the two are compared. Specifically, the base station frequency point information of the base station No. 1 in table 4 and the base station No. i in table 5 is consistent with the cell identification code, but the position coordinates of the base station No. 1 and the base station No. i in table 5 are inconsistent, so that the base station information of any one base station in table 5 is inconsistent;

next, the base station information of base station No. 2 in table 4 is compared with the base station information in table 5. The base station information of base station No. 2 in table 4 is most similar to that of base station No. ii in table 5, and the two are compared. Specifically, the base station frequency point information, the cell identification code and the position coordinates of the base station No. 2 in table 4 and the base station No. ii in table 5 are completely consistent, so the base station information of the base station No. 2 and the base station No. ii are completely consistent;

third, the base station information of base station No. 3 in table 4 is compared with the base station information in table 5. Base station information of base station No. 3 in table 4 is most similar to base station No. iii in table 5, and the two are compared. Specifically, the position coordinates of the base station No. 3 in table 4 are consistent with the position coordinates of the base station No. iii in table 5, but the frequency point information is inconsistent with the cell identification code, so that the base station information of the base station No. 3 is inconsistent with the base station information of any one base station in table 5;

fourth, the base station information of base station No. 4 in table 4 is compared with the base station information in table 5. The base station information of base station No. 4 in table 4 is most similar to that of base station No. iv in table 5, and the two are compared. Specifically, the base station frequency point information, the cell identification code and the position coordinate of the base station No. 4 in table 4 and the base station No. iv in table 5 are completely consistent, so the base station No. 4 is also a legal neighbor base station;

finally, the base station information of base station No. 5 in table 4 is compared with the base station information in table 5. Through comparison, the frequency point information, the cell identification code and the position coordinate of the base station No. 5 in the table 4 are inconsistent with those of any base station in the table 5.

In summary, the base station information of the base station No. 2 in the first base station information is consistent with the base station information of the base station No. ii in the second base station information, the base station information of the base station No. 4 in the first base station information is consistent with the base station information of the base station No. iv in the second base station information, and the base station information of any one of the base stations No. 1, no. 3, and No. 5 in the first base station information is inconsistent with the base station information of the base station No. ii in the second base station information.

And a generating module 340, configured to generate a legal neighbor base station list according to the comparison result.

Wherein the comparison result is obtained by comparing the first base station information and the second base station information by the comparison module 330.

In an embodiment, the step of generating, by the generating module 340, a legal neighbor cell base station list according to the comparison result includes:

For example, the comparison result obtained by the comparison module 330 by comparing the first base station information shown in table 4 and the second base station information shown in table 5 is: the base station information of the No. 2 base station in the first base station information is consistent with the base station information of the No. II base station in the second base station information, the base station information of the No. 4 base station in the first base station information is consistent with the base station information of the No. IV base station in the second base station information, and the base station information of any one of the No. 1, no. 3 and No. 5 base stations in the first base station information is inconsistent with the base station information of any one of the second base station information.

And taking the adjacent base station with the first base station information and the second base station information completely consistent as a legal adjacent base station, so that the No. 2 base station in the first base station information (corresponding to the No. II base station in the second base station information) and the No. 4 base station in the first base station information (corresponding to the No. IV base station in the second base station information) are legal adjacent base stations.

According to the contents of table 4 or table 5, the base station information corresponding to the base station No. 2 in the first base station information or the base station No. ii in the second base station information and the base station No. 4 in the first base station information or the base station No. iv in the second base station information is tabulated to form a legal neighboring base station list, as shown in table 6.

TABLE 6

The first sending module 310 is further configured to send a radio resource control connection release signal carrying the legal neighboring base station list to the terminal, so that the terminal can implement communication connection based on the legal neighboring base station list.

After the generating module 340 generates the legal neighbor base station list, it is also necessary to send the legal neighbor base station list to the terminal, so that the terminal performs communication connection based on the legal neighbor base station list. In one embodiment, the base station sends a radio resource control connection release signal carrying a legal neighbor base station list to the terminal. The function of sending rrc connection release signal to the terminal is also performed by the first sending module 310. It should be noted that the rrc connection release signal is signaling for the terminal to release the connected radio resource to connect to another radio resource. The rrc connection release signal carries the legal neighbor base station list generated by the generating module 340. The terminal receives a wireless resource control connection release signal sent by the base station, releases the infinite resource in the connection state, performs cell search through the legal neighbor cell base station list to obtain cell system information, performs random access based on the cell system information, and finally realizes new communication connection.

Fig. 4 is a schematic block diagram of a base station authentication apparatus provided in a fourth embodiment, which may be used for a terminal. As shown in fig. 4, the base station authentication apparatus includes: a second transmitting module 410 and a second receiving module 420.

A second sending module 410, configured to send the communication system measurement signal to the base station.

The communication system measurement signal is sent to the base station through the second sending module 410 when the terminal has a network handover requirement. There are various reasons for the terminal to generate the network handover requirement, and generally, the conditions for the terminal to generate the network handover requirement and trigger the terminal to send the communication system measurement signal to the base station include, but are not limited to: the signal quality of the service cell is lower than a preset first threshold and/or the quality of the inter-system adjacent cell is higher than a preset second threshold. The service cell is the cell where the terminal is currently located, and the inter-system neighboring cell refers to a target cell with a different wireless access technology from that of the service cell.

For the base station, after a receiving module of the base station receives a communication system measurement signal sent by the terminal, the base station learns that the terminal has a network switching requirement through the communication system measurement signal, and sends a request for obtaining base station information to a neighboring base station. After receiving a request for acquiring base station information sent by the base station, the neighboring base station feeds back first base station information to the base station, wherein the first base station information includes, but is not limited to, a base station frequency point, a cell identification code and a position coordinate of the neighboring base station. And after receiving the first base station information, the base station compares the first base station information with the pre-stored second base station information, and takes the adjacent base station with the first base station information and the second base station information completely consistent as a legal adjacent base station. The second base station information is pre-stored base station information of the neighboring base station, and includes but is not limited to pre-storing a base station frequency point, a cell identification code and a position coordinate of the neighboring base station. The base station generates a legal neighbor cell base station list based on the base station information of all legal neighbor cell base stations, and sends a radio resource control connection release signal carrying the legal neighbor cell base station list to the terminal so that the terminal can realize communication connection based on the legal neighbor cell base station list. The base station information of the legal neighboring base station includes, but is not limited to, a base station frequency point, a cell identification code and a position coordinate of the legal neighboring base station. For the specific implementation of the above process, reference may be made to the description of relevant contents in the embodiment corresponding to fig. 3, and details are not described herein again.

A second receiving module 420, configured to receive a radio resource control connection release signal returned by the base station, where the radio resource control connection release signal carries a legal neighbor base station list.

After the base station receives the communication system measurement signal sent by the terminal through the first receiving module 320, it is known that the terminal has a network switching requirement, and then a radio resource control connection release signal carrying a legal neighbor base station list is generated based on the comparing module 330 and the generating module 340, and is sent to the terminal through the first sending module 310, so that the terminal releases the radio resource in a connection state, and a new communication connection is established based on the legal neighbor base station list.

The legal neighbor cell base station list is generated by the base station generating module 340 based on a result of comparing the first base station information and the second base station information by the comparing module 330, wherein the first base station information is the base station information returned by the request for obtaining the base station information sent by the neighbor cell base station in the first sending module 310 of the base station, and includes the base station frequency point, the cell identification code and the position coordinate of the neighbor cell base station, the second base station information is the base station information of the neighbor cell base station prestored by the base station, and includes the base station frequency point, the cell identification code and the position coordinate of the neighbor cell base station prestored in the base station, and the neighbor cell base station includes a second generation communication base station. The specific process of comparing the first base station information with the second base station information by the comparing module 330 to obtain the comparison result, and generating the legal neighbor base station list based on the comparison result by the generating module 340 includes:

the base station comparing module 330 compares the similarities and differences between the first base station information and the second base station information, and obtains a comparison result;

the generating module 340 takes the neighboring base station with the completely consistent first base station information and second base station information in the comparison result as a legal neighboring base station;

the generating module 340 generates a legal neighbor cell base station list based on the base station information of all legal neighbor cell base stations, wherein the base station information of the legal neighbor cell base stations includes but is not limited to base station frequency points, cell identification codes and position coordinates of the legal neighbor cell base stations.

The base station authentication apparatus further includes:

a cell search module, configured to perform cell search based on a legal neighbor cell base station list in the radio resource control connection release signal, and obtain cell system information;

It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims

1. A base station authentication method is applied to a base station, and comprises the following steps:

comparing the first base station information with the second base station information, and generating a legal neighbor base station list according to the comparison result, wherein the method comprises the following steps:

taking the neighboring base station with the first base station information and the second base station information completely consistent as a legal neighboring base station; the second base station information is pre-stored base station information of a neighboring base station, and the pre-stored base station information of the neighboring base station comprises a base station frequency point, a cell identification code and a position coordinate of the pre-stored neighboring base station;

generating the legal neighbor cell base station list based on the base station information of all the legal neighbor cell base stations; the base station information of the legal neighbor cell base station comprises a base station frequency point, a cell identification code and a position coordinate of the legal neighbor cell base station;

2. The method as claimed in claim 1, wherein before sending the request for obtaining base station information to the neighboring base station, the method further comprises:

and receiving a communication system measurement signal sent by the terminal.

3. The base station verification method according to claim 2, wherein the triggering condition for the terminal to send the measurement signal of the communication system includes that a signal quality of a serving cell is lower than a preset first threshold and/or a quality of an inter-system neighbor cell is higher than a preset second threshold, and the serving cell is a cell where the terminal is currently located; the inter-system neighboring cell refers to a target cell with a different wireless access technology from the serving cell.

4. A base station verification method is applied to a terminal and comprises the following steps:

transmitting a communication system measurement signal to a base station;

receiving a radio resource control connection release signal returned by a base station, wherein the radio resource control connection release signal carries a legal neighbor cell base station list, the legal neighbor cell base station list is obtained by the base station through comparing first base station information and second base station information, the first base station information is base station information returned by a request for obtaining base station information sent by the neighbor cell base station in a feedback manner, the base station information comprises a base station frequency point, a cell identification code and a position coordinate of the neighbor cell base station, the second base station information is base station information of the neighbor cell base station prestored by the base station, the second base station information comprises the base station frequency point, the cell identification code and the position coordinate of the prestored neighbor cell base station, and the neighbor cell base station comprises a second generation communication base station; after receiving the rrc connection release signal sent by the base station, the method further includes:

5. The base station verification method according to claim 4, wherein the triggering condition for the terminal to send the communication system measurement signal to the base station includes that the signal quality of a serving cell is lower than a preset first threshold and/or the quality of an inter-system neighbor cell is higher than a preset second threshold, and the serving cell is a cell where the terminal is currently located; the inter-system neighboring cell refers to a target cell with a different wireless access technology from the serving cell.

6. The method as claimed in claim 4, wherein the request for obtaining base station information is sent by the base station to the neighboring base station after receiving the communication system measurement signal sent by the terminal.

7. A base station authentication device, applied to a base station, includes:

a generating module, configured to generate a legal neighbor cell base station list according to the comparison result, where the neighbor cell base station with the first base station information completely consistent with the second base station information is used as a legal neighbor cell base station; the second base station information is pre-stored base station information of a neighboring base station, and the pre-stored base station information of the neighboring base station comprises a base station frequency point, a cell identification code and a position coordinate of the pre-stored neighboring base station;

generating the legal neighbor cell base station list based on the base station information of all the legal neighbor cell base stations; the base station information of the legal adjacent cell base station comprises a base station frequency point, a cell identification code and a position coordinate of the legal adjacent cell base station;

8. A base station verification device is applied to a terminal and comprises the following components:

a second receiving module, configured to receive a radio resource control connection release signal returned by a base station, where the radio resource control connection release signal carries a legal neighbor base station list, where the legal neighbor base station list is obtained by the base station by comparing first base station information with second base station information, where the first base station information is base station information returned by a request for obtaining base station information, which is sent by a neighbor base station and is fed back by the base station, and includes a base station frequency point, a cell identification code, and a position coordinate of the neighbor base station, the second base station information is base station information of a neighbor base station prestored by the base station and includes a base station frequency point, a cell identification code, and a position coordinate of the neighbor base station prestored by the base station, and the neighbor base station includes a second-generation communication base station; the base station authentication apparatus further includes: