| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2010: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Research Abstract |
In delay tolerant networks, global clock synchronization among nodes is a challenging problem because reference clock information cannot be disseminated promptly over nodes due to the lack of stable connections among nodes. We proposed averaging-based algorithms for distributed global clock synchronization, where two mobile nodes exchange their local clock times when they meet and adjust their own clocks to the average of them. We further conducted the continuous-time analysis and revealed how the clock accuracy of nodes and meeting rates among them affect the rate of convergence to the steady state and the accuracy of clock synchronization in steady state.
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