METHOD AND DEVICE FOR PRESERVATING TRANSMISSION DATA IN MULTI SATELLITE COMMUNICATION SYSTEM

摘要

PURPOSE: A method and a device for securing/maintaining transmission data of a multimedia satellite communication system are provided to maintain the security of data transmitted in an initialization process for connecting a communication terminal with the Internet. CONSTITUTION: A CDMA(Code Division Multiple Access) code and channel frequency data received from a central station are stored in a data memory(41), and a common PID(Process IDentifier) is stored in a demultiplexer(34). A call connection request with the Internet is received from a communication terminal. Predetermined terminal address data of a set top box, subscriber information inputted from the communication terminal and the common PID are read, to generate a predetermined information message. A control message is generated, and the CDMA code data and the channel frequency data are allocated to be delivered to the central station. A traffic PID is generated using a controlling PID received from the central station and predetermined terminal address data. The controlling PID, channel frequency, CDMA code and the traffic PID are reset for registration.