1 後卓越計畫進度報告 曾煜棋老師實驗室. 2 A Link-layer Protocol for Event-driven...
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Transcript of 1 後卓越計畫進度報告 曾煜棋老師實驗室. 2 A Link-layer Protocol for Event-driven...
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後卓越計畫進度報告曾煜棋老師實驗室
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A Link-layer Protocol for Event-driven WSNs
Joint two subissues Exploiting the spatial correlation of sensor
data Designing a specific MAC protocol
Sink
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Basic IdeaSink
TDMA
CSMA
Built on top of any CSMA-based protocol
A CSMA-basedMAC Protocol
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Proposed Solution Two modes
ES mode & NES mode
Issues involved in the ES mode Entering the ES Mode
The first slot stars on-the-fly in an event-driven manner Slot Assignment Slot Size Synchronization Leaving the ES Mode
Energy efficiency Combine our protocol with the LPL (Low Power
Listening)Chih-Yu Lin, Yu-Chee Tseng, and Ten-Hwang Lai, “Exploiting Spatial Correlation on the Link Layer for Event-driven Sensor Networks” (Submitted to INFOCOM 2008)
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Simulation Results
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e
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SCMAC-TSA SCMAC-SSC SCMAC
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ay (
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CSMA CSMA-SSC SCMAC-SSC-TSA
SCMAC-TSA SCMAC-SSC SCMAC
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Red
unda
nce
CSMA CSMA-SSC SCMAC-SSC-TSA
SCMAC-TSA SCMAC-SSC SCMAC
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MAX_LEVEL
Cov
erag
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CSMA CSMA-SSC SCMAC-SSC-TSA
SCMAC-TSA SCMAC-SSC SCMAC
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Implementation