Apparatus and Method for Network Synchronization Acquisition using GPS receiver in mobile interactive satellite communication system

摘要

1. Technical Field of the invention defined in the claims ; The invention. Thing of network synchronization acquisition apparatus and method for a portable two-way satellite communication system using the receiver jipieseu ; 2. SUMMARY invention ; to the invention is to solve this, in the terminal station of a mobile interactive satellite communication system using a jipieseu (GPS) receiver obtains its own location information, from which accurate timing of the data transmission by calculating a satellite transmission delay time, the central station and to enable accurate data transmission and reception between the terminal station, the network synchronization of the mobile interactive satellite communication system using the acquiring device and its purpose is jipieseu receiver that provides the method. ; 3. Solution subject matter of the invention ; This invention provides a network synchronization acquisition device in the mobile interactive satellite communication system, storage means for storing coordinate information of the repeater / the central station; It receives the "network information and time slot allocation information providing table, to be transmitted to the terminal station from the central station, the table receiving means for extracting a transmission start time of the time slot allocated; The current location information of the terminal station received from the GPS receiver, the repeater / the central station coordinate information stored in the storage means, three-dimensional coordinate conversion means for converting a rectangular coordinate; The station received from the coordinate conversion means / repeater / the central station of the current using three-dimensional orthogonal coordinate, and calculates the satellite position information at the present time and the transmission delay time of the using the calculated current satellite transmission delay Current satellite transmission delay time computing means for updating a transmission time slot starting time derived from the table, the receiving means; The current program clock reference (PCR: Program Clock Reference) that is transmitted from the updated start time, and reverse time slots transmitted by the modulator current satellite transmission delay time calculation means of the terminal station in the actual transmission time of the time slot by using a value prediction means for predicting the location; And calculate the predicted satellite transmission delay time in the future location of the terminal in the prediction means, and calculating the future time slot transmission start time to reflect the calculated future satellite transmission delay time for transmission to the uplink modulator including satellite transmission delay time calculation means. ; 4. An important use of the invention ; The present invention used to fight and net acquisition of portable two-way satellite communication system.