Maritime information delivery systems based on mobile ad hoc networks

首先，在海上实验中验证了在27/40 MHz无线频段通过多跳无线通信进行数据传输的可行性。在这种环境下，传输速度极低，即1,200bps。然后，我们开发了一种新的广播方案，称为Discount-SJ(基于距离和计数器的短抖动方案)，以确保从陆地站到船只(特别是。渔船)在如此狭窄的频带环境中。我们还提出了一种称为EqPC(均衡功率控制)的传输功率控制方案来提高单播通信的吞吐量。仿真结果表明，该算法优于已有的算法。

First of all, the feasibility of data transmission over multi-hop wireless communications in 27/40MHz wireless bands was verified in the at-sea experiment. In this environment, transmission speed is extremely low, that is, 1,200bps. Then we developed a new broadcast scheme called DISCOUNT-SJ (distance and counter-based scheme with short jitter) in order to surely and quickly disseminate messages from land-station to vessels (esp. fishing boats) in such a narrow band environment. We also developed a transmission power control called EqPC (equalized power control) scheme to enhance throughput of unicast communications. Our simulation results show that are superior to the existing ones.