Digital Tv User Management System Design And Development

Digital TV(DTV), as a kind of Information Service, is about to be developed in the whole country. A problem to be faced is how to authorization control & manage for the Pay-TV service. The DTV Subscriber Management System (SMS) are brought to solute the urgent problem. The SMS is an information management system that managers the subscriber's information and requests entitlement management messages (EMM) from Conditional Access System (CAS). Conditional access (CA) is a technology used to control access to digital television (DTV) services to authorized users by encrypting the transmitted programming. An EMM provides general information about the subscriber and the status of the subscription. The EMM is sent with the ECM. The ECM is a data unit that contains the key for decrypting the transmitted programs. The dissertation finishes the system's construction and design work under the background of developing the DTV service in SiChuan. According to an all-ground requirement analysis, a two-tier client/server system model is designed, which fits the facts at the moments. The client tier is developed by PowerBuilder - a software used to develop database application, which finishes the presentation and business logic function. The sever tier is implemented by SQL Server 2000, which provides the data management function. The system also communicates with CAS and bank system on TCP/IP. As a real-time system, providing reliability and rapid service are required. The thesis takes measures from hardware configuration, software development and database design to ensure the system's flexibility, reliability and capability.