Due to the particularity of the construction of communication base stations such as mobile and China Unicom, the location distribution of base stations is more complicated. In China, the topography and landscape are ever-changing. It is necessary that urban rural areas and mountain plains may become the stop points of base stations, and they are generally unattended. The phenomenon of theft is becoming more and more rampant, and the outdoor and indoor equipment of the base station are in danger of being stolen, which is likely to cause the base station to fail to work normally and cause immeasurable losses. Therefore, the demand for intelligent access control is becoming more and more urgent. Because of the limitations of network cabling, traditional access control schemes are no longer applicable, and wireless access control solutions have emerged.
When it comes to wireless access control, people may have cognitive misunderstandings, thinking that wireless means that there is no need to connect between the card reader, controller, electronic lock, exit button and door magnet. In fact, this is not true. For the power supply of the electronically controlled lock, it is necessary to connect the power supply with a wired connection. In addition, all of the above devices are installed near the door, and the interconnection is simple, and no wireless is required. The wireless access control technology described in this solution refers to the networking mode of the access controller and the upper management computer. Usually, the access control system is wired rs-485/'target='_blank'>RS-485/422 bus, and newer products use TCP/IP network for networking. These two methods are managed in the base station access control. There are obvious limitations in the application, rs-485/'target='_blank'> RS-485 bus communication distance is not far enough, TCP/IP network wiring wire investment is huge; now our proposed wireless access control system is to wirelessly The access controller is connected with the upper management computer to form a wireless access control network. This wireless method utilizes the off-the-shelf GSM communication network to transmit data through SMS, and the place where the mobile phone signal can be connected.
Chapter 2 System Overview, Design Principles and Functional FeaturesFirst, the system overview
Kingkang series access control products use the most advanced digital electronic technology, identification technology, wireless communication technology and network technology to integrate intelligent identification, computer network management and digital monitoring into one, and promote access control to a new world. . In this solution system, we will use RF card access control to centrally manage and decentralize the access management of each channel (here mainly the base station door). We can use the proximity card as the base station maintenance personnel and patrol personnel to enter and exit the mobile communication base station. The voucher can generate the entry and exit records of the security access control channel of the mobile base station through the computer, and access the linkage device through the access environment detection device to transmit the alarm information in real time to ensure the stable operation of the base station.
Second, the design principle
Due to the need for security and efficient management, the design of the base station access control system should follow the following principles:
System availability
The content of the base station access control system should meet the actual needs. It is convenient and simple to establish the system or the modification. The software operation is simple and easy to use, and the data storage and transplantation is convenient.
System stability
Since the base station access control system is an uninterrupted long-term system, the safe and stable operation of the base station is closely related to people's lives, so the stability of the system is particularly important. The system is required to have more than one year of successful application experience in the market, with a corresponding customer base and customer service system. In terms of communication, the wireless networking method adopted by the system is based on the GSM mobile communication network, and the communication signal is stable in the place where the mobile phone signal is present.
System security
All equipment and accessories in the base station access control system should operate in a safe and reliable manner, and should also comply with relevant Chinese or international safety standards, and can work effectively in non-ideal environments. Powerful real-time monitoring and linkage functions ensure the security of the environment.
System scalability
As the technology of access control systems continues to evolve, user requirements are also changing. Therefore, the design and implementation of the base station access control system also takes into account the actual needs that can be expanded in the future, and can also flexibly increase or decrease or update each subsystem to meet different requirements. The needs of the period, maintaining a long-term leading position, become a model for practical application. When the system is designed, the functions that need to be implemented are properly configured, and the configuration can be changed. The configuration changes are possible and convenient even after the project is completed. The system software is upgraded and improved according to the needs of the developers in different historical periods, and free software upgrades are provided for the corresponding application customers. At the same time, it can be expanded into a card system such as attendance system and patrol management system.
System maintainability
The maintenance of the base station access control system should be as simple as possible during operation. The system is really working when it is powered on, and it can be operated by plugging it in. And there is no need to use too many dedicated maintenance tools during maintenance. From the configuration of the computer to the configuration of the system, the configuration of the front-end equipment fully considers the system reliability and implements the corresponding certification. While minimizing the system failure rate, we also ensure that data is easily saved and quickly restored even when problems occur due to unexpected reasons, and that the channel can be quickly opened in an emergency. The maintenance of the entire system is online and will not stop the normal operation of all equipment due to the maintenance of some equipment.
All in all, the system is more convenient, safer and more reliable for the management and monitoring of the base station.
Third, the main design basis
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