Development of 27MHz/40MHz bands maritime wireless ad-hoc networks

The maritime MANET (Mobile Ad-hoc Network) system using 27MHz/40MHz bands was developed under the technical committee of the Japanese Ministry of Internal Affairs and Communications for “development of technical examination services concerning frequency crowding.” The maritime MANET is based on AODV (Ad-hoc On-demand Distance Vector) with a transmission power control. After three years study including simulations and demonstrative experiments at sea off Nishinomiya and Kushimoto, the committee has reported the technical standards for the maritime ad-hoc networks using 27MHz/40MHz bands. In this paper, we describe a part of the activities and achievements of the working group constituted under the committee. In the maritime experiments at sea off Kushimoto, five-hop communication was achieved and the effectiveness of the transmission power control was also verified.