METHOD AND APPARATUS FOR RECEIVING A SIGNAL FROM AN ARTIFICIAL SATELLITE, SIGNAL TRANSMITTING METHOD, AND INFORMATION SYSTEM FOR RECEIVING AND TRANSMITTING AN INFORMATION TO AND FROM AN ARTIFICIAL SATELLITE

摘要

PPROBLEM TO BE SOLVED: To provide an effective satellite switching means for preventing degradation in throughput at non-switching times, in a communication/broadcast system using an orbit satellite by switching and using the satellites used for services. PSOLUTION: Reference numeral 5505 denotes a transmission/reception pattern of a satellite 1 before being switched, and 5506 denotes a transmission/reception pattern of a satellite 2 after being switched. In this case, the types of data are classified into one 5507 for which a short time response is required and the other one 5508 for which it is not required. The data for which the throughput must be kept constant, such as steaming or broadcasting, is included in 5507. A section sandwiched with inverted triangles 4, 5 is a satellite switching period. The transmission period of 5508 for which a short time response is not required is overlapped on the satellite switching period. In this way, the satellites can be switched without impairing the communication quality of the data for which the throughput must be kept constant, such as streaming or broadcast. PCOPYRIGHT: (C)2004,JPO