生产级企业WLAN上的米级Wi-Fi RTT定位
Meter-Level Wi-Fi RTT Localization on a Production Enterprise WLAN
浏览论文内容
中文总结 AI 辅助
本研究在生产级企业WLAN上评估Wi-Fi RTT定位，发现无需专用基础设施即可实现米级精度，并提出AP感知的软件校准方案。
中文摘要 AI 辅助
Wi-Fi精细时间测量（FTM）通过复用已部署用于连接的接入点（AP）来实现室内定位，但先前的评估大多使用专门部署或为测距校准的AP，这使得尚不清楚生产级企业WLAN能否在无需定位专用基础设施的情况下提供有用的定位。我们在IllinoisNet（一个实时校园WLAN，其AP为覆盖和容量而部署）上评估了Wi-Fi往返时间（RTT）定位。使用五部商用Android手机，在覆盖视距（LOS）、非视距（NLOS）和多径条件的50米×30米办公楼层的10个静态位置进行测试，加权非线性最小二乘实现了1.21米的中位误差和2.68米的第90百分位误差，且无需更换AP、重新定位或测距校准。残差的大小和符号在不同AP和传播条件下有所变化，这表明单一的全局校正不足，并促使采用AP感知的软件校准而非新建定位专用基础设施。
英文摘要
Wi-Fi Fine Time Measurement (FTM) promises indoor localization by reusing access points (APs) already deployed for connectivity, but prior evaluations mostly use APs purpose-deployed or calibrated for ranging, leaving it unclear whether a production enterprise WLAN can provide useful localization without localization-specific infrastructure. We evaluate Wi-Fi round-trip time (RTT) localization on IllinoisNet, a live campus WLAN whose APs were placed for coverage and capacity. Using five commodity Android phones at 10 static locations across a 50 m x 30 m office floor spanning LOS, NLOS, and multipath conditions, weighted nonlinear least squares achieves a median error of 1.21 m and a 90th-percentile error of 2.68 m, with no AP replacement, repositioning, or ranging calibration. Residuals vary in magnitude and sign across APs and propagation conditions, suggesting a single global correction is insufficient and motivating AP-aware software calibration rather than new localization-specific infrastructure.
发表机构
- University of Illinois Urbana-Champaign（伊利诺伊大学厄巴纳-香槟分校）
机构由 AI 辅助整理，请以论文原文为准。
