CRAWDAD dataset umich/virgil (v. 2008-03-28)

We collected the data set through war walking, i.e., collecting Wi-Fi beacons by walking around the neighborhoods in different cities in the United States, for the field study and evaluation of Virgil, an access point selection system.我们通过无线漫步扫描（war walking）的方式采集本数据集，具体为在美国不同城市的街区步行采集WiFi信标（Wi-Fi beacons），用于对接入点选择系统Virgil开展现场研究与性能评估。