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1. System overview
The campus GPRS one-card system is designed according to the overall idea of the digital campus network. This system is the core of the entire digital campus. It not only has various functions such as consumption and charging, but also virtual financial management, sending and receiving SMS, equipment management, water control, Various management functions such as electronic control, library management, access control attendance, bank deposit and so on.
The system adopts GPRS wireless network, through the one-card general management platform and one-card information release platform, through unified identity authentication, it can be perfectly integrated with the school management information system, so as to achieve no data redundancy and truly realize a digital campus system with high data sharing. , to provide better services for the school management information system.
2. Introduction to GPRS network
GPRS is a relatively perfect business for solving mobile communication information services at present. It is based on data flow, wide coverage and faster data transmission. The introduction of GPRS provides an infrastructure platform for industrial and enterprise users to carry out wireless office, and creates favorable conditions for promoting the application and development of mobile office. Compared with the wired network, the GPRS network has the advantages of low rental cost, mobile office, and no geographical restrictions. The emergence of GPRS provides a new choice for enterprises and industrial users to carry out wireless office.
The GPRS communication method is more suitable for the meteorological information collection business. At present, the meteorological center and each collection point use X.25 and PSTN for interactive transmission. The monthly rental fee is too high. Not cheap either.
3. The main functional characteristics of the system and the benefits it can bring
1. Functions of campus GPRS card system
This system uses broadband IP (DDN dedicated line) + GPRS wireless network technology to ensure the interconnectivity of the network and provide a bandwidth guarantee with a certain QOS. Without changing the existing networking scheme, the remote wireless data transmission function is realized by adding GPRS DTU equipment.
This system is developed by comprehensively applying current advanced computer technology, especially GPRS network technology, IC card technology, data management and other technologies, to improve the school’s ability to manage people, finances and things in a unified way. It has the following functions:
·It can replace the staff ID, student ID, library card, medical card, meal ticket, water ticket, etc.
·School consumption by teachers and students (dining in restaurants, purchase of daily necessities, Internet consumption, sports facilities consumption and other daily consumption, etc.)
·School department, each office expense control management. (Through the virtual account of each department of the school in the All-in-One Card, the school can accurately control and manage the expenses of each department and each office, such as copying from department A to department B, swiping the card on the POS machine of department B and deducting the prepaid amount from the virtual account of department A. In this way, the expenses of each department can be easily controlled, and at the same time, the workload analysis of each department, the use of existing resources, etc. can be done for each department:
·Student status management, school registration.
·Attendance management (through the control of access personnel, the system can accurately grasp the situation of personnel in the whole school, and can accurately provide whether each person is in school for a certain period of time).
· Book loan management.
·Access control management.
·Consumption of living service centers, student activity centers, student apartments, swimming pools and other premises.
2. The benefits of using the campus GPRS card to the school:
Improving the image of the school and simplifying the daily management of the school can greatly reduce the workload of relevant personnel. At the same time, by setting up virtual accounts for each department and office of the school, the school can accurately control and manage the expenses of each department and each office, thereby greatly improving. The management level and management efficiency of the school promote the construction of school spirit and discipline.
3. Financial benefits of using campus GPRS card system:
The school funds are highly centralized, unified and simple fund management, eliminating tedious cash management, simple reconciliation and account transfer, eliminating the leakage of funds and accounts, saving human resources, and reducing the workload of relevant department staff and financial personnel, real-time On-campus consumption inquiry and monitoring.
4. The benefits of using the campus GPRS card system for teachers and students in the whole school:
Safer currency, more convenient, no need to carry cash, unified, simple and fast consumption payment can be convenient to check consumption details at any time.
5. The benefits of using the campus GPRS card system for students and parents:
Reduce the amount of children’s cash, can track and control children’s consumption in school
4. System performance characteristics
1. Seamless integration with campus network.
The system uses the existing school local area network as the basis of the system to avoid re-distribution of the network, the system cost is low, and it can be used for authorization, management and charging of multimedia teaching. It can be used for automatic identification of the school’s fault reporting system and so on.
Powerful system functions: the system software is easy to operate, the functions are well-considered, and the independence of each module is strong. The system provides advanced management functions, and the handling methods for various abnormal situations, such as hardware failures, charging operation errors, blacklists, card failures, etc. , have been carefully considered and set up.
2. Advanced technology:
a) The advanced nature of the system IC card
The system adopts the world’s most advanced Mifare1 contactless radio frequency smart card (S50) as the information carrier of the campus card. The capacity of the card is 8Kbits, divided into 16 independent sectors, which can be applied to at least 16 different applications. Each application has independent multiple password protection without interfering with each other. It has an anti-collision mechanism and supports multi-card operation at the same time.
b) The advanced nature of hardware structure
The hardware of our company’s campus card system adopts a three-layer structure, and the POS consumer machine can run away from the PC; PC local workstation platforms such as (consumption workstation, recharge workstation, access control workstation, attendance workstation, load workstation, etc., require the local workstation to establish a local database, With various data backup functions), the workstation can run away from the central server, and the system (including each workstation) can run normally if the network fails anywhere. Once the network is connected, the workstation software can download the latest information to the center in time.
c) Advances in software architecture
In order to facilitate the expansion of the functions of the one-card card, the software must be divided into a system management layer and a workstation subsystem layer in terms of architecture.The system management center manages each application subsystem in a unified manner, each subsystem can be flexibly customized by the user, and the user can develop the subsystem by himself and join the one-card system
3. Data security and reliability
In terms of security, we adopt the overall security design of the system, including: IC card management security, key management security, transaction access security and GPRS network security to ensure the safety and reliability of the entire system business process and ensure data transactions. Integrity, confidentiality and resistance to repudiation. In terms of data reliability, the system network adopts online mutual backup design, and the server adopts dual-machine hot backup design to ensure the stable and reliable operation of the system. All data will be stored in each management terminal. In the event of network failure or server failure, each terminal, The PC works as usual, and all data will be saved in each read-write terminal. Once the network is restored, all data will be automatically sent back to the system center database.
The system must be specific to the following mechanisms and technologies to ensure the safety and reliability of the system:
Equipment-level reliability: In the design, by selecting network equipment with high reliability design, the equipment failure rate is reduced and the network reliability is improved. The reliability of the device itself is the main factor that determines the reliability of the entire network system. In particular, the GPRS equipment at the collection point is an important guarantee for the normal operation of the entire system business. This time, the Saro 3130P series GPRS DTU equipment of Xiamen Sangrong Technology Co., Ltd. has high reliability and passed the national standard EMC anti-interference test, which fully guarantees the network reliability at the equipment level.
Backup design of interconnecting lines: each node is connected to other nodes through multiple lines to avoid single-channel failure and improve network path redundancy. In addition to using the APN dedicated line as the main network this time, the local city bureau also chose the ADSL/ISDN network as the backup link in order to improve the reliability of the link.
IC card security: The system must use the most advanced non-contact smart IC card in the world, and the communication between the card and the reader must use the internationally accepted DES (US military encryption algorithm) encryption and triple key mutual authentication communication Way.
Authorization control: system operators have strict permission settings, password authentication, and keep operation records for filing; the activation of cards and read-write devices must be authorized by the system. Some special sensitive operations, such as key generation and management, IC card initialization, price setting, etc., must be authorized by two or more people.
System database control: The system database is encrypted, and even if the database file is obtained illegally, it cannot be opened; the system database implements strict partition management, and users with different departments and different permissions can only perform the operations assigned by the system. Important data such as passwords and other key records are encrypted with complex algorithms before being stored in the database.
Data encryption: The data collected from the consumer terminal is packaged into a local data packet according to a certain DES algorithm for transmission.
Advanced hardware technology: adopt the world’s most advanced software and hardware technology to ensure network security. The system network adopts the design of online/offline mutual backup to ensure the stable and reliable operation of the system. In the event of failure of the relevant network components, the system will automatically enter the off-network operation, and all data will be stored in each terminal. Once the network returns to normal, all data will be automatically sent back to the system management center. The system read-write device has built-in environmentally friendly long-life battery, which can ensure the normal operation of the machine for more than a few hours after a power failure.
Strict management system: Set operating authority for each link of the entire system, such as recharge, IC card, equipment, key, management center and other functional groups to establish a strict management system to ensure the stable and safe operation of the entire system.
4. Design in strict accordance with design specifications
The IC cards and various management modules used in this system are designed in strict accordance with the relevant national specifications such as “China Financial Integrated Circuit (IC) Card Specifications”, “China Financial Integrated Circuit (IC Card) Application Specifications”.
5. Strong system scalability:
Considering the needs of future development, our system fully considers the reliability of expansion and upgrade in various aspects such as product selection, capacity and processing capacity. This consideration not only fully protects the original investment, but also has a high comprehensive sex ratio. In terms of implementation, the software and hardware of each subsystem are designed with a modular structure, and it is quite easy to increase or decrease the system functions, only need to increase or decrease the corresponding functional modules and hardware devices. The software upgrade and hardware expansion of the system are quite convenient, and can be flexibly configured according to the needs of users. Our company has successfully developed the following systems that are closely connected with the one-card system: Virtual financial management function; SMS communication subsystem, which can be connected with the SMS services of China Mobile and China Unicom to realize interactive information communication among parents, students and schools. If necessary, it can be installed and used at any time. In addition, in order to ensure particularly great expansion and protect the existing investment, our company provides secondary development interface, card read and write interface, and provides the key of all sectors of the card to the school system administrator.
6. Convenient management and easy maintenance
The system is extensive and we implement real-time control and management in many modules. System administrators can easily adjust the system without changing the operation of the system. The campus GPRS one-card equipment is advanced and stable, the software is mature, the daily failure rate is extremely low, it is easy to eliminate when a failure occurs, and the daily management operation is simple and convenient.
7. Rich and detailed report design:
This system provides full-featured and accurate statistical and management reports, including all consumption data, recharge data, card opening data, card issuance data, settlement and reconciliation, book borrowing data, access data, medical data, student information, etc. Information such as time period, operation location, operator, operation type, and unit can be flexibly queried individually or in combination. It can provide self-defined report function, and can expand the reports in the system through software or special development tools.
8. Cross-platform operation:
The system fully considers the diversity of campus systems, and is compatible with a variety of mainstream operating systems (compatible with various Windows, SCOUnix, Linux, Solaris operating systems) and a variety of large database management systems (Oracle, SQL Server, Sybase).
Five, campus GPRS card system structure
One-card system topology
The campus GPRS one-card system can be divided into three levels according to its functions:
1. System Integrated Management Center
2. Subsystem management
3. Front-end POS machine application control layer.
The whole system is based on GPRS network and supports a variety of network protocols. In order to ensure the stability and reliability of the system, the system server adopts the method of dual-system hot backup. In addition to the system platform software and database installed in the server for sharing by all terminals on the network, network functions such as file sharing, printing sharing, and system security protection can also be provided. The integrated management center is the core of the application management and security of the entire system. It is responsible for the generation and management of system keys and the maintenance and management of the entire system center database, such as system initialization, etc. The system management center is also responsible for information management and distribution of all system operators. Subsystem operator authority, responsible for adding and deleting functions of all devices. At the same time, the system management center is also responsible for the entire system security management, system operation monitoring and so on.
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