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Experiments on packet delivery performance at the PHY/MAC layer Experiments set-up

“Understanding Packet Delivery Performance in Dense Wireless Networks” - J. Zhao, R. Govidan The First ACM Conference on Embedded Networked Sensor Systems , Nov. 2003. Experiments on packet delivery performance at the PHY/MAC layer Experiments set-up

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Experiments on packet delivery performance at the PHY/MAC layer Experiments set-up

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  1. “Understanding Packet Delivery Performance in Dense Wireless Networks” - J. Zhao, R. GovidanThe First ACM Conference on Embedded Networked Sensor Systems, Nov. 2003 • Experiments on packet delivery performance at the PHY/MAC layer • Experiments set-up • 60 Mica motes / RF Monolithics radio / Tiny OS • Varying factors • The choice of environments • Office building / Local state park / Large, spacious parking lot • Physical layer coding schemes • 4b6b / Manchester / SECDED • Transmit power settings • High (potentiometer 0) / Medium (potentiometer 50) / low (potentiometer 90) • Packet delivery at the physical layer • Spatial Characteristics of Packet Delivery • Signal Strength and Packet Delivery • Coding Schemes • Temporal Characteristics of Packet Delivery

  2. 1. Aggregate Packet Delivery Performance - The Distribution of Packet Loss 2. Spatial Characteristics of Packet Delivery

  3. 3. Signal Strength and Packet Delivery 4. Temporal Characteristics of Packet Delivery

  4. Conclusions • Describing the results from measurement experiments • Performance of the packet delivery • Dense sensor network deployments • Realistic environments • Contributions • First step of studying the performance of sensor networks in various environments • Insights for modeling packet loss • Useful measurement data for sensor network simulation • Future works • Causes for the experimental results • Multi-path, transceiver calibration …

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