| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve such a problem that data information can not be restored if halfway information disappears when a master station performs simultaneous reporting to terminal stations in an integrated communication system, wherein a digital line network is composed of satellite connections or terrestrial channels in a system (group) comprising the master station and several terminal stations. SOLUTION: Since follow control can not be performed in simultaneous reporting, a protocol that replaces the follow control is necessary. By using an IP (Internet protocol) with a master station for officially announcing a simultaneous report as a host station and terminal stations for receiving the simultaneous report as a client station because the system is composed of digital lines, a simultaneous report is divided into unit data such as a frame and packet, an error check is performed in each of the unit, and retransmission is requested. If an error is detected in data transmitted from, a terminal station requests the master station to retransmit the data. The master station retransmits a packet for the data error sent from the terminal station to repair the data.</p> |
