1. System overview
In order to meet the development needs of the new situation, improve scientific and technological prevention capabilities, implement strict control and careful prevention of mobile phone signals in the prevention area, and eliminate hidden security risks caused by illegal use of mobile phones. The current mobile communication development has entered a new stage of 4G and 5G. , Put forward higher realistic requirements for mobile phone signal control.
In the past, only traditional mobile phone signal jammers were installed and used mainly for power interference shielding for 2G voice services. The CDMA technology could not break through the technical problems at all, and mainly high-power white noise interference. However, with the evolution of communication standards and the construction and popularization of operators' 3G and 4G communication networks, this technical solution has gradually appeared to prevent loopholes and shielding failures. At the same time, problems such as radiation, multiple equipment failures, and shielding difficulties have gradually emerged.
Based on the current situation of mobile phone signal control and new development needs, with the commercialization of 4G communication networks and future 5G technology research and breakthroughs, mobile phone signal control is facing greater challenges. It is urgent to plan and build a set of low-radiation, comprehensive A mobile phone signal intelligent control system with precise format and perimeter control, highly intelligent self-adaptation, and multiple functions such as signal shielding and illegal mobile phone detection and positioning.
Based on the above background and needs, our company has launched a new generation of mobile phone communication intelligent detection and positioning control system for all base stations.
The system adopts the principle of enterprise-level private network base station, combined with mobile phone detection technology and regional positioning technology, and solves the problem of effective management and control of preventing mobile phone signals in the area.

core advantages:

 (1) Intelligent shielding of base stations in the entire network;

(2) Illegal mobile phone detection;

(3) Illegal mobile phone positioning;

(4) Extraction of illegal mobile phone numbers;

(5) Interception of text messages sent by illegal mobile phones;

(6) Interception of the called mobile phone number of illegal mobile phone calls;

(7) The black and white list of mobile phone users is selected.

(8) Adopt the latest multi-service digital optical fiber distribution technology, optical fiber transmission, simple construction and convenient maintenance. (Optional)

2. Overall system plan

1: Design principles
1) Security
When designing and developing, fully consider the security mechanism of the entire system, with security and confidentiality, strict authority management, and reliable security and confidentiality measures.
2) Advancement and maturity
The system adopts advanced technology and equipment, which can not only ensure the reliable application of the current system, but also adapt to the requirements of future technology and business development.
3) Reliability and stability
The design of the entire system should ensure the connectivity of data transmission and storage to ensure long-term reliable operation of the system.
4) Scalability
The system design should leave sufficient room to facilitate future expansion, upgrade and integration.
5) Practicality and economy
Fully consider the practicability of the system, combine the actual needs of the prison, design a reasonable plan according to the demand, and optimize the combination.

2: Design basis
1) GB50348-2004 "Technical Code for Safety Protection Engineering"
2) EIA/TIA TSB-72 "Standard for Centralized Optical Fiber Cabling System"
3) EIA/TIA TSB-75 "Open Office Wiring System Standard"
4) YD/T 926.1-2001 "General Specification for Building Integrated Wiring System"
5) YD/T 926.2-2001 "Technical Requirements for Cables and Optical Cables for Integrated Wiring"
6) YD/T 926.3-200 "Technical Requirements for Connection Hardware for Integrated Wiring"
7) GB50057-1994 "Code for Lightning Protection Design of Buildings"
8) GB50174-1993 "Code for Design of Electronic Computer Room"


Three, system specific plan
1: System architecture
The whole system consists of 3 parts:


1) Remote equipment: Intelligent detection and positioning control unit for mobile phone communication of all base stations.
In each independent building unit, a set of all-base station mobile phone communication intelligent detection and positioning management and control equipment is arranged, and multiple sets of equipment are combined into a complete regional mobile phone management and control system through the optical fiber local area network.

2) Central computer room equipment:
The system center management server and a set of mobile terminal management and positioning platform software are connected to each remote device through the central computer room optical fiber switch, and receive data collected by each remote device and various instructions issued to the remote device.

3) Indoor, indoor and outdoor antenna signal distribution system
Through the antenna feeder system, the base station signal of each remote device is covered to the indoor and outdoor of the building to ensure that there is no dead angle of the base station signal in the prevention area.
For building areas with a small coverage area, a multi-service digital optical fiber distribution system can be selected to couple base station sources from adjacent main building management and control equipment for coverage, reducing construction costs.


2: Main equipment of the system
(1) Intelligent management and control equipment for mobile phone detection and positioning of all base stations. The control frequency of all base stations is as follows:
Frequency band Uplink (MHz) Downlink (MHz) Operator Network standard
Working frequency band 1 890-915 935-960 China Mobile/Unicom GSM900MHz 2G voice
Working frequency band 2 825-835 870-880 Telecom CDMA800MHz 2G voice and EVDO
Working frequency band 3 1745-1780 1840-1875 China Unicom/Telecom FDD 1800MHz 4G FDD-LTE
Data and intercom
Working frequency band 4 1880-1920 Mobile Band 39 4G TDD-LTE
Data and intercom
Working frequency band 5 2010-2025 Mobile Band 34 3G TD-SCDMA
Data and intercom
Working frequency band 6 1920-1940 2110-2130 Telecom 2100MHz 4G FDD-LTE
Data and intercom
Working frequency band 7 1940-1980 2130-2170 Unicom 2100MHz 3G WCDMA
4G FDD-LTE
Data and intercom
Working frequency band 8 2320-2370 Mobile Band40 4G TDD-LTE
Data and intercom
Working frequency band 9 2575-2635 Mobile Band41 4G TDD-LTE
Data and intercom
When the mobile phone enters the control coverage area, the mobile phone communication control system of the whole base station forces the mobile phone to switch from the public network to the control system and immediately obtains the IMSI and IMEI information (mobile phone body number and mobile SIM card number) of the mobile phone, and then pushes the whitelisted mobile phone to On the public network, blacklisted mobile phones reside in the management and control system.