1aUW7. Development of the acoustic packet data relay communication system and the results of its sea trial.

Session: Monday Morning, December 2

Time: 11:32


Author: Hiroshi Ochi
Location: Deep-Sea Technol. Dept., Japan Marine Sci. and Technol. Ctr., Natsushima-cyo 2-15, Yokosuka, 237 Japan
Author: Takuya Shimura
Location: Deep-Sea Technol. Dept., Japan Marine Sci. and Technol. Ctr., Natsushima-cyo 2-15, Yokosuka, 237 Japan
Author: Yasutaka Amitani
Location: Deep-Sea Technol. Dept., Japan Marine Sci. and Technol. Ctr., Natsushima-cyo 2-15, Yokosuka, 237 Japan
Author: Toshio Tsuchiya
Location: Deep-Sea Technol. Dept., Japan Marine Sci. and Technol. Ctr., Natsushima-cyo 2-15, Yokosuka, 237 Japan

Abstract:

In order to recover the data obtained by various sensors deployed in the ocean, a study was made concerning the acoustic digital data communication system [Ochi et al., Proc. Meeting Marine Acoust. Soc. Jpn., pp. 85--86 (1996) (in Japanese)]. The data communication system was constructed by up to 99 of the same type of equipment in the area, and its specifications are: a half-duplex communication, FSK modulation, a 2500bps data rate, HDLC (high-level data link control procedure) protocol packet transmission, CRC (cyclic redundancy check) code, and frame retransmission for error detection/correction. The sea trial of this system was done at about a 4000-m depth area. Three sets of equipment were deployed in the ocean, and one of them hangs from the ship. Then, relay data transmission, among the three sets of equipment, was carried out. The detail of that sea trial will be shown at this presentation.


ASA 132nd meeting - Hawaii, December 1996