| 摘要 |
PURPOSE:To improve the operating efficiency of a time division multiple access(TDMA) frame of the assignment system at any time by varying the ratio of constitution of a control area and a traffic area in a frame at any time in response to the number of participated earth stations and data traffic quantity. CONSTITUTION:An area whose length is not fixedly assigned but set by a required length for an earth station participating in the satellite communication system actually to send/receive synchronizing bursts 2-27 is set as a control area in a TDMA frame for each occasion and the remaining area of the said frame is used as the traffic area. That is, each traffic station sends the synchronizing bursts 2-27 closely to the area timewise after the reference burst 1 being the time reference of the system for each participation actually to form the control area with expansion and if a traffic station quitting the system exists, the synchronizing bursts 2-27 located at the tail end timewise in the control area are moved to the synchronizing burst position. Thus, the remaining traffic area in the frame is secured at the maximum. |
