arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1701.02528cs.NI
收藏

为什么连接到WiFi接入点需要这么长时间

Why It Takes So Long to Connect to a WiFi Access Point

Changhua Pei, Zhi Wang, Youjian Zhao, Zihan Wang, Yuan Meng, Dan Pei, Yuanquan Peng, Wenliang Tang, Xiaodong Qu

摘要:

今天的WiFi网络提供了很大一部分流量。然而,WiFi网络的性能和质量仍然远远不能令人满意。在许多流行的质量指标(吞吐量、延迟)中,成功连接到WiFi AP的概率和WiFi连接建立过程的时间成本是影响WiFi用户体验的两个最关键的指标。为了了解真实世界设置中的WiFi连接设置过程,我们对$4$代表城市的$5$百万移动用户进行了测量研究,并在$0.4$十亿WiFi会话中与$7$百万AP相关联,这些会话是从Android/iOS应用程序市场的移动“WiFi Manager”应用程序中收集的。据我们所知,我们是第一个做这样大规模的研究:WiFi连接建立时间成本有多大,影响WiFi连接建立过程的因素是什么,以及可以做些什么来减少WiFi连接建立时间成本。基于测量分析,我们开发了一种基于机器学习的AP选择策略,可以显着提高WiFi连接建立性能,对传统的策略纯粹基于信号强度,通过减少连接建立失败从$33\%$到$3.6\%$和减少$80\%$时间成本的连接建立过程超过$10$倍。

英文摘要:

Today's WiFi networks deliver a large fraction of traffic. However, the performance and quality of WiFi networks are still far from satisfactory. Among many popular quality metrics (throughput, latency), the probability of successfully connecting to WiFi APs and the time cost of the WiFi connection set-up process are the two of the most critical metrics that affect WiFi users' experience. To understand the WiFi connection set-up process in real-world settings, we carry out measurement studies on $5$ million mobile users from $4$ representative cities associating with $7$ million APs in $0.4$ billion WiFi sessions, collected from a mobile "WiFi Manager" App that tops the Android/iOS App market. To the best of our knowledge, we are the first to do such large scale study on: how large the WiFi connection set-up time cost is, what factors affect the WiFi connection set-up process, and what can be done to reduce the WiFi connection set-up time cost. Based on the measurement analysis, we develop a machine learning based AP selection strategy that can significantly improve WiFi connection set-up performance, against the conventional strategy purely based on signal strength, by reducing the connection set-up failures from $33\%$ to $3.6\%$ and reducing $80\%$ time costs of the connection set-up processes by more than $10$ times.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑