Understanding Packet Delivery Performance in Dense Wireless Networks J. Zhao, R. Govidan The First A

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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

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1. Aggregate Packet Delivery Performance - The
Distribution of Packet Loss
2. Spatial Characteristics of Packet Delivery
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3. Signal Strength and Packet Delivery
4. Temporal Characteristics of Packet Delivery
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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