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Title: Demystifying and puncturing the inflated delay in smartphone-based WiFi network measurement
Authors: Li, W
Wu, D
Chang, RKC 
Mok, RKP
Keywords: Accuracy
Network measurement
Issue Date: 2016
Publisher: Association for Computing Machinery, Inc
Source: CoNEXT 2016 - Proceedings of the 12th International Conference on Emerging Networking EXperiments and Technologies, 2016, p. 497-504 How to cite?
Abstract: Using network measurement apps has become a very effective approach to crowdsourcing WiFi network performance data. However, these apps usually measure the user-level performancemetrics instead of the network-level performance which is important for diagnosing performance problems. In this paper we report for the first time that a major source of measurement noises comes from the periodical SDIO (Secure Digital Input Output) bus sleep inside the phone. The additional latency introduced by SDIO and Power Saving Mode can inflate and unstablize network delay measurement significantly. We carefully design and implement a scheme to wake up the phone for delay measurement by sending just enough warm-up and background traffic. Our evaluation results show that the overall median delay overheads can be kept within 3ms, regardless of the actual network delay.
Description: 12th ACM Conference on Emerging Networking Experiments and Technologies, ACM CoNEXT 2016, Irvine, US, 12-15 December 2016
ISBN: 9781450342926
DOI: 10.1145/2999572.2999595
Appears in Collections:Conference Paper

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