A measurement study of interference modeling and scheduling in low-power wireless networks

• DOI: 10.1145/1460412.1460427
• Publication Date: 2008-11-14T13:17:40Z
• Authors: Ritesh Maheshwari; Shweta Jain; Samir R. Das
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology

Accurate interference models are important for use in transmission scheduling algorithms wireless networks. In this work, we perform extensive modeling and experimentation on two 20-node TelosB motes testbeds -- one indoor the other outdoor to compare a suite of their accuracies. We first empirically build validate physical model via packet reception rate vs. SINR relationship using measurement driven method. then similarly instantiate simpler models, such as hop-based, range-based, protocol model, etc. The accuracies evaluated experiments. observe that while is most accurate, it still far from perfect, providing 90-percentile error about 20-25% (and 80 percentile 7-12%), depending scenario. accuracy worse scenario-specific. second best trails by roughly 12-18 points similar targets. Somewhat throughput performance differential between also observed when used with greedy algorithms. Carrying further, look closely into incarnations 'thresholded' (conservative, but typically considered literature) 'graded' (more realistic). show solving shot problem, graded version can improve `expected throughput' over thresholded imperfect links.