| 摘要 |
PURPOSE:To attain effective utilization of a satellite by reducing a useless call unit of a telephone class communication synchronizing signal at the most frequent time in the international marine satellite communication. CONSTITUTION:A line state transmission section 7 of a communication network management station 1 sends operating state information of a satellite line used for a telephone class communication equipment via a common signaling channel 5 to all coast earth stations 2 and vessel earth stations 3 under the management of the communication network management station 1. A line allocation request regulation section 8 of the coast earth stations 2 and the vessel earth stations 3 receives the operating state information to regulate a line allocation request to the communication network management station 1 when it is identified that no idle satellite line is available. |
