Data Transmission And User Management Based On CATV Network

The cable TV is charged and managed to be one of the groundwork of a cable TV station. To cable TV station, it is main sources of its income to charge and pay for the first installment, and it is the foundation of guaranteeing development steady in a long-term of cable TV station. It is an important contents in the user management to regain the charge and reduce installation cost in time, and It determines the economic benefits of a platform and self-development ability to a great extent. To adopt add /solve by way of disturbing, influence quality of the signal and increase cost. After fully comparing, analyzing many kinds of schemesing, This paper design a charge management system which is cheap and suitable for China, and is addressable administrative system of charging by cable TV station relatively. System consists of hardware and software, organize according to C/S mode. Setting up the user's data base in the server systematically at first, according to the situation which the user pays, the server produced the information of controlling automatically; Control information output through the RS-232 port of the server, then channel encoder, modulating machine one by one, coupling in CATV channel at last. At customer terminal station finish undergoing demodulation and decoding, the addressable control terminal station (customer terminal) carry out and offer service or shut off the user TV signal. Customer terminal respond the server's instruction such as querying terminal state, Carry out the relevant operation, and return to the data that server needs. Broadcast communication and one to one of communication are adopted in the communication way ,realizing half a duplexing communication way. The design of the software is had, this system utilizes the platform of management control of independent development. Store user's information with Database, and carry on report form,etc. to deal with to user's information. In order to guarantee systematic performance and stability, the software development mode of package entirely is adopted; It utilizes C/S model and share memories, COMs, many thread,etc. technologieses serve and set free as one a kind of packages operations. As soon as the platform stop to run because of trouble, the whole systematic will not influence either. Whole systems discuss main hardware and the designs of softwares in detail, give test result of producing, The experiment proves, the scheme is rational and have practical value.