Patent ID: 6941108

Claim:
A VSAT communication system for performing mutual communications between a plurality of VSAT stations and a single hub station via a satellite repeater, characterized in that: each of said VSAT stations comprises a transmission controller having a buffer for temporarily reading and storing communication data to be transmitted, and outputting the stored communication data as transmission data after elapse of a given period of time, a transmission data switching circuit for selecting a transmission circuit for the transmission data thus output from the buffer, and a communication traffic monitoring circuit for monitoring the stored amount of communication data in said buffer, and outputting a communication path selecting signal to select a transmission circuit depending on the stored amount of communication data to said transmission data switching circuit, thus providing a demand assign multiple access function for selecting a transmission circuit for the transmission data; and said transmission circuit selected for the transmission data comprises either a CSG line or a dedicated line for a return link, and each of said VSAT stations outputs a dedicated line calling request for keeping a frequency band and establishing said dedicated line through said CSG line to the hub station which is a central one of said VSAT stations, at the same time that said demand assign multiple access function is performed.