パーソナルコンピュータとWireless Adapterを用いた船内ネットワーク

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Up to now, we have been attempting the construntion of the inboard network that uses the telephone line and inboard power supply (100V). However, since we need to have lines always available for emergency calls and ordinary business calls, we must avoid marking the inboard telephone lines busy. Moreover, if we are using our inboard 100V line for the telecommunication line, we might have some problems such as decrease in data transmission speed, or, in the extreme case, serious problems like communications failure, etc. in case of the occurrence of electric noise on the line. Another problem of the above both systems is that we could not let more than two personal computers access to each other at the same time. In order to solve those problems, we have had experiments on the inboard data transmission that uses Wireless Adapter. The inboard network that combines the modems and the radio lines cannot achieve good compatibilty between a modem and Wireless Adapter, causing poor communications efficiency. Accordingly, when we assume the limited use inboard communications only, we consider it best to install Wireless Adapter directly to RS-232C like System 2. And if the file are compressed before data transmission, data transmission efficiency improves 70-130%. In this case, we’ve confirmed that we’ve been able to support transmission of still images even at this speed. Therefore, we conclude that it would be the best policy to compress network drive file and data before transmission.
長崎大学の論文

パーソナルコンピュータとWireless Adapterを用いた船内ネットワーク

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