| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2008: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Research Abstract |
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.
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