Rapid and accurate pre-acquisition equipment and pre-acquisition method for IMSI information of mobile phone

Abstract

The invention discloses equipment and a method for quickly and accurately pre-collecting IMSI (International Mobile Subscriber Identity) information of a mobile phone. The method mainly comprises the following steps of: physically blocking an instantaneous communication signal, triggering a measurement signal threshold value of the terminal, forcing the terminal to quickly carry out one-time network scanning and reselection, and combining a multi-PLMN (Public Land Mobile Network) broadcast technology, so that the problems that the IMSI acquisition speed of a mobile phone is not high enough, the IMSI acquisition is not accurate enough, and data analysis cannot be one-to-one and the like are solved.

Description

Technical Field

[0001] The present invention belongs to the field of wireless communication technology, and in particular relates to a method for realizing fast and accurate pre-collection of IMSI information of mobile phone terminals of all standards based on mobile communication technology. Background Art

[0002] Mobile terminal IMSI information collection technology has achieved good results in the field of mobile terminal data collection, and has been widely used in special communication industries such as confidentiality management and public safety, providing a large number of scenario applications and data support for the special communication industry.

[0003] With the popularization of mobile communication networks, smart mobile terminal devices such as mobile phones have been fully upgraded to 4G and 5G networks. While smart devices facilitate daily life, they also bring new challenges in the field of confidentiality management. How to quickly and accurately obtain mobile phone IMSI data to effectively supplement the information files of confidential personnel and achieve more effective and precise management of personnel has become more urgent. This demand is a technical problem that urgently needs innovation and breakthroughs.

[0004] There are two main methods for confidentiality management departments to obtain mobile phone IMSI data: one is to install specific software in the mobile phone, obtain the permission of the mobile phone operating system, and then obtain the mobile phone IMSI data. This method is limited by the mobile phone model and the mobile phone operating system version. For example, all IOS iPhone phones cannot directly obtain IMSI. For the protection of privacy, Android-based mobile phones have upgraded their systems, such as Huawei, Xiaomi, Samsung, OPPO and vivo, and they cannot be read directly. Therefore, the method of obtaining IMSI information by installing specific software cannot ensure full collection, and there is a blind spot in data collection.

[0005] Another way is through big data collision. Mobile phone IMSI data collection is achieved through analog communication base stations. Due to the invisible and uncontrollable boundaries of wireless signals, the collected data cannot be accurately controlled, and full and accurate collection cannot be achieved. Matching can only be done through big data analysis. However, even through big data analysis, there are still large deviations, and one-to-one accurate collection and fast matching cannot be achieved.

[0006] Therefore, quickly collecting IMIS data from mobile phones and accurately matching it with individuals to create files is a technical challenge that urgently needs to be solved in the current field of confidentiality management. Summary of the invention

[0007] Aiming at the insufficiency of traditional IMSI collection technology means that cannot quickly collect and accurately match personnel, the present invention provides a mobile phone IMSI information fast and accurate pre-collection device and pre-collection method. It mainly triggers the measurement signal threshold of the terminal by physically blocking the instantaneous communication signal, forces the terminal to quickly perform a network scan and reselect, and combines multi-PLMN broadcast technology to solve the problems of mobile phone IMSI collection speed not being fast enough, not being accurate enough, and data analysis not being able to be one-to-one.

[0008] In a first aspect, the present invention provides a method for quickly and accurately pre-collecting mobile phone IMSI information: Place the mobile phone terminal in a fully enclosed pre-collection device to completely isolate the mobile phone signal, put the mobile phone into an offline state and trigger network search and network selection; Through the 4G LTE radio frequency system in the pre-acquisition device, the multi-PLMN technology is used to broadcast the operator's MIB system messages and SIB sub-messages, and communicate and interact with the mobile terminal to obtain the IMSI information; The 4G LTE radio frequency system is connected to the host computer through an isolated Ethernet, and the IMSI information is reported to the host computer. The host computer system combines the three-party data to achieve a one-to-one matching of the IMSI data and the personnel information.

[0009] In the second aspect, the present invention provides a pre-collection device, which adopts an electromagnetic isolation box and is used for the above-mentioned pre-collection method. The device includes an upper collection area and a lower wireless transmission area; the collection area is a mobile phone terminal placement area and an antenna area; the wireless transmission area is provided with a 4G LTE radio frequency system.

[0010] Beneficial effects of the present invention: The present invention makes up for many deficiencies in the pre-collection record of mobile phone IMSI information in the current confidentiality personnel management, and can make the pre-collected data 100% complete, and the IMSI collection process can be achieved in seconds, which greatly improves the speed and accuracy of the whole pre-collection process, which is specifically reflected in the following aspects: 1. Using a single TDD and FDD baseband chip instead of multiple base stations, and utilizing multi-PLMN technology, the IMSI collection of all mobile phone terminals of all standards of the four major operators on the market that support 4G network standards, namely, China Mobile, China Unicom, China Telecom, and China Broadcasting.

[0011] 2. The communication signal isolation box can be used to pre-collect IMSI data quickly and conveniently. Whether it is a single-card or dual-card mobile phone, the data can be collected quickly, and the collected data is unique and accurate.

[0012] 3. After the collected IMSI data and personnel data are matched one by one, they can be further used as basic data for management, providing a powerful means for confidentiality and security. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a diagram of the device composition of an embodiment of the present application; Figure 2 This is a 4G LTE radio frequency system architecture diagram of an embodiment of the present application; Figure 3 This is a flowchart of an embodiment of the present application. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] The overall technical concept of the present invention: The present invention involves using communication signal isolation technology to prompt mobile phone terminals to disconnect from the network and reselect the network, and using multiple PLMN site building technology to simulate the signals of the four major operators, namely, China Mobile, China Unicom, China Telecom, and China Broadcasting, so as to achieve rapid collection of the IMSI of mobile phones of all operator standards, and realize accurate matching with personnel information through the host computer system.

[0016] like Figure 1 As shown, the device body provided by the embodiment of the present application is a portable mobile shielding box that can be opened / closed, and the interior is composed of four parts: C1 collection area, C2 wireless transmission area, C3 power isolation (i.e., power isolation management unit) and C4 transmission isolation (i.e., transmission isolation network unit). Among them, the C1 collection area is the upper mobile phone mobile terminal placement area and antenna area, which is divided into two parts with the lower layers C2, C3, and C4; the C2 wireless transmission area is the 4G LTE radio frequency system part, which is composed of two modulation modes, TDD and FDD, and works at the same time, which can ensure compatibility with earlier 4G single-standard (such as single mobile version / single Unicom Telecom version) mobile phone terminals, and both single-card and dual-card mobile phone terminals can be collected one-to-one without distinction, ensuring the uniqueness of the collection. C3 power isolation provides a stable power supply for C2 to ensure the stable operation of C2. The C4 isolation network provides a data transmission channel.

[0017] In a preferred example, the box body is made of cast aluminum and is subjected to conductive oxidation treatment throughout to form an outer shielding layer; the power port and the network port use filtering isolation to prevent crosstalk of high-frequency signals; the inner surface is fully bonded with a wide-screen absorbing material with a frequency of 10MHz to 6GHz and a magnetic permeability of 120H / m, and the closed opening of the box is covered with a self-adhesive foam conductive tape, so that a fully enclosed electromagnetic isolation environment is achieved inside the box after it is closed.

[0018] like Figure 2 As shown, the embodiment of the present application adopts the domestic ARM+FPGA+AD+RF radio frequency solution, wherein ARM is the domestic Rockchip RK3358 processor; FPGA is the domestic Gaoyun GW5A-138 logic programming IC; AD is the Dixin Fengxing series GC0801 radio frequency transceiver; the power chip of the power isolation management unit adopts the domestic SCT9431FSAR wide voltage and high current DC / DC to provide power supply for the entire system. Among them, ARM is responsible for communication control with the host computer through the NET isolation network, such as parameter setting, data reporting and other information processing and loading and running of the 3gpp protocol stack, FPGA is responsible for the implementation of the parsing algorithm, AD is responsible for the conversion and processing of digital signals and analog signals, and the back-end LNA is a low-noise amplifier, that is, the processing of the uplink receiving signal; PA is a primary power amplifier, that is, the amplification and transmission of the downlink transmitting signal, providing a maximum power output of 0dbm. Furthermore, the core DC / DC of the power management unit adopts the domestic SCT9431FSAR, providing power supply for ARM, FPGA, AD, PA and LNA to ensure the stable operation of the system.

[0019] Based on the design of the above-mentioned pre-collection device, the embodiment of the present application also provides a method for quickly and accurately pre-collecting mobile phone IMSI information: The mobile phone terminal is placed in a portable fully enclosed electromagnetic isolation box to completely isolate the mobile phone signal, put the mobile phone into an offline state and trigger network search and network selection. Through the 4G LTE radio frequency system in the box, the MIB system messages and SIB sub-messages of the four major operators, China Mobile, China Unicom, China Telecom, and China Radio and Television, are broadcast using multi-PLMN technology, and the IMSI information is obtained by communicating and interacting with the mobile phone terminal. The 4G LTE radio frequency system is connected to the host computer through an isolated Ethernet and reports the IMSI information to the host computer. The host computer system combines the data of the three parties to achieve a one-to-one match between the IMSI data and the personnel information.

[0020] Furthermore, according to the 3GPP protocol, after the mobile phone terminal is disconnected from the network, it will perform a network search and reselect a cell to enter the reselection process. The present invention isolates the communication signal to put the information of the mobile phone terminal in an offline state, thereby triggering the cell reselection process.

[0021] Furthermore, the 4G LTE radio frequency system will simultaneously transmit TDD modulation signals and FDD modulation signals. The TDD modulation signal mainly collects the IMSI data of China Mobile and China Broadcasting Corporation mobile terminals, while the FDD modulation signal mainly collects the IMSI data of China Unicom and China Telecom mobile terminals, thereby realizing network reselection of mobile terminals under different network standards. The reselection and collection signaling process is completed within 500ms, and the entire collection process is completed within 1s.

[0022] Furthermore, the multi-PLMN technology is specifically: Through a single 4G LTE radio baseband system, the broadcast communication of PLMN information of multiple different operators is realized, that is, the TDD radio baseband realizes the broadcast of mobile and radio and television PLMN information, and the FDD radio baseband chip realizes the broadcast of Unicom and Telecom PLMN information, thereby realizing the interaction between mobile terminals of different operators and a single baseband chip. Among them, each radio baseband system can support five groups of multi-PLMN broadcast, which can meet the collection of all mobile terminals supporting 4G LTE on the market at home and abroad. This design especially solves the problem that mobile operators of old 4G mobile phones only support TDD network standards but not FDD network standards.

[0023] Furthermore, the one-to-one matching of the IMSI data and the personnel information is specifically: The collection and reporting of IMSI data is realized through the radio frequency collection system and transmission link in the collection equipment. The upper computer system automatically binds the information of the collected person through time association, thereby realizing a one-to-one match between IMSI data and personnel information.

[0024] like Figure 3 As shown, the specific workflow of the embodiment of the present application is: After power-on, the acquisition device performs necessary system initialization and RF initialization, and then transmits broadcast signals at an extremely low transmission power of -10dbm. Low-power transmission can control the effective signal coverage range, thereby reducing the problem of being unable to distinguish whether the mobile terminal is the only one being collected due to the mobile terminal being placed in the acquisition box without closing the lid before triggering the acquisition.

[0025] When the mobile phone is placed in the device collection area and the lid is locked, the mobile phone signal is immediately cut off and connectivity is lost due to the physical shielding of the device. At this time, the mobile phone will trigger the process of re-searching the network for signals. Since the radio frequency system in the collection device continuously broadcasts the operator's base station signal, the mobile phone will parse the broadcast message after receiving it during the network search process. When it is found that the PLMN broadcasted is consistent with the PLMN of the operator to which the mobile phone SIM card belongs, it will initiate a connection with it and report its own identity information (IMSI) during the brief signaling interaction process for verification by the device's radio frequency system.

[0026] After parsing the IMSI of the mobile phone, the collection device sends a denial of access command to the mobile phone and reports the collected data to the host computer. Since the collection device has a broadcast bandwidth of no less than 5M, it can process multiple accesses in parallel. The collection process for dual-SIM phones is the same as that for single-SIM phones.

[0027] In summary, the device for rapid and accurate pre-collection of IMSI information and the method for pre-collection thereof described in the present invention, by combining physical shielding with radio frequency communication principles, can quickly solve the problem of rapid detection and registration of mobile wireless electronic products by key confidentiality departments, greatly facilitating the collection of files for one machine and one file. This technical solution is not limited to machine models or operating systems, and can collect SIM card identity information of mobile terminals that meet 3GPP communication technology standards.

[0028] The embodiments described in the present invention are specific embodiments of the present invention, which are used to illustrate the concept of the present invention, are explanatory and exemplary, and should not be interpreted as limiting the embodiments of the present invention and the scope of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the claims and the contents disclosed in the specification of this application, including technical solutions that adopt any obvious replacement and modification of the embodiments described herein.

[0029] The technical features disclosed above are not limited to the disclosed combinations with other features. Those skilled in the art may also make other combinations between the technical features according to the purpose of the invention to achieve the purpose of the invention.

Claims

1. A method for quickly and accurately pre-collecting mobile phone IMSI information, characterized in that: Place the mobile phone terminal in a fully enclosed pre-collection device to completely isolate the mobile phone signal, put the mobile phone into an offline state and trigger network search and network selection; Through the 4G LTE radio frequency system in the pre-acquisition device, the multi-PLMN technology is used to broadcast the operator's MIB system messages and SIB sub-messages, and communicate and interact with the mobile terminal to obtain the IMSI information; The 4G LTE radio frequency system is connected to the host computer through an isolated Ethernet, and the IMSI information is reported to the host computer. The host computer system combines the three-party data to achieve a one-to-one matching of the IMSI data and the personnel information.

2. A method for fast and accurate pre-collection of mobile phone IMSI information according to claim 1, characterized in that: The 4GLTE radio frequency system simultaneously transmits TDD modulation signals and FDD modulation signals, wherein the TDD modulation signals collect IMSI data of mobile and radio and television mobile terminals, and the FDD modulation signals collect IMSI data of China Unicom and China Telecom mobile terminals.

3. A method for fast and accurate pre-collection of mobile phone IMSI information according to claim 2, characterized in that: The mobile phone terminal performs network reselection under different network standards, and the reselection acquisition signaling process is completed within 500ms, and the entire acquisition process is completed within 1s.

4. A method for fast and accurate pre-collection of mobile phone IMSI information according to claim 2, characterized in that: Through the single 4G LTE RF baseband system, the broadcast communication of PLMN information of multiple different operators can be realized, that is, the TDD RF baseband chip realizes the broadcast of PLMN information of China Mobile and China Broadcasting Corporation, and the FDD RF baseband chip realizes the broadcast of PLMN information of China Unicom and China Telecom, thereby realizing the interaction between mobile terminals of different operators and a single baseband chip.

5. A method for fast and accurate pre-collection of mobile phone IMSI information according to claim 4, characterized in that: The transmission power of the broadcast is -10dbm and the bandwidth is not less than 5M.

6. A method for fast and accurate pre-collection of mobile phone IMSI information according to claim 1, characterized in that: The one-to-one matching of the IMSI data and the personnel information is specifically: The host computer system automatically binds the collected information to the person through time association, thereby achieving a one-to-one match between IMSI data and person information.

7. A pre-mining device, using an electromagnetic isolation box, used in the pre-mining method according to any one of claims 1 to 6, characterized in that: It includes an upper collection area and a lower wireless transmission area; the collection area is a mobile phone terminal placement area and an antenna area; the wireless transmission area is equipped with a 4G LTE radio frequency system.

8. A pre-mining device according to claim 7, characterized in that: The main body of the box is made of cast aluminum and is subjected to conductive oxidation treatment to form an outer shielding layer. The inner surface is fully bonded with a wide-screen absorbing material with a frequency of 10MHz to 6GHz and a magnetic permeability of 120H / m. The closed opening of the box is covered with a self-adhesive foam conductive tape, so that the interior of the box can achieve a fully enclosed electromagnetic isolation environment after the box is closed.

9. A pre-mining device according to claim 7, characterized in that: The 4G LTE radio frequency system includes: ARM unit, responsible for communication control with the host system, information processing and loading and running the 3GPP protocol stack; FPGA unit, responsible for the implementation of the parsing algorithm; AD unit is responsible for the conversion and processing of digital signals and analog signals.

10. A pre-mining device according to any one of claims 7 to 9, characterized in that: It also includes a power isolation management unit and a transmission isolation network unit; The power isolation management unit provides a stable power supply for the 4G LTE radio frequency system; The transmission isolation network unit provides a data transmission channel for the 4G LTE radio frequency system.

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