| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
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| Outline of Final Research Achievements |
In multi-hop wireless sensor networks based on carrier-sense multiple access, there is a problem that throughput is lowered in bidirectional communication due to packet collision and packet retransmission caused by a hidden terminal problem. In this research, in order to realize highly efficient and reliable packet transmission in a bidirectional communication environment, IFNC (Inter-flow Network Coding with Passive ACK), which combines IFNC (Inter-flow Network Coding) and Passive ACK), was developed. We examined the control parameter optimization of encoding latency and passive ACK collision avoidance mechanisms in order to improve the performance of IFNCPA. Computer simulations revealed that IFNCPA is effective from the viewpoint of collection ratio and end-to-end delay.
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