Application of Ethernet technology in ROV communication system
                                                         QI Sheng bo1, SU Zhi kun1, JIANG Wen liang2
（1.College of Engineering, Ocean University of China, Qingdao 266100, China;2.Sencott Intelligent Instrument Co., Ltd., Qingdao 266100, China）

Abstract: In order to solve the problems that the signals of video, data and control were transmitted in different cables in traditional ROV communication system, Ethernet communication technology was applied in ROV communication system. According to the analysis of the functional requirements of ROV communication system, a kind of star topology communication network was designed in ROV control system. In terms of hardware, the signals of video, data and control were transmitted in the same channel, that simplified the hardware structure of the communication system. In terms of software, the signal of video was transmitted by RTSP, an application layer protocol in TCP/IP system and the signals of data and control were transmittedby TCP/IP, that achieved three kinds of signal full duplex parallel transmitting. The experimental results show that this communication system can meet the needs of ROV communication. Compared with the traditional ROV communication system, this communication system had higher communication speed and better stability, as well as the simpler structure of hardware, so it can be directly embedded in the ROV control system.

Key words: remote operated vehicle （ROV）; Ethernet; serial server; communication protocol