| Budget Amount *help |
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
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)
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| Research Abstract |
One of the problems affecting sensor networks in natural environments is the attenuation of radio waves due to high moisture objects. This attenuation is greatest in the case of a 2. 4-GHz radio wave. A system is being developed that uses a transmission control method to estimate communication environment fluctuations caused by changes in the natural environment. For developing the above control method, we have investigated a relationship between natural environmental changes and wireless transmission characteristics by developed sensor nodes in real environment. And, it was suggested that the transmission control method by using stored sensing data in each node is suitable by considering the field investigation results and a real requirement of environmental monitoring.
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