WiCare: A Synthesized Healthcare Service System Based on WiFi Signals

摘要

To help the independent-living elders or patients nursed in a single isolated ward, we propose a proof-of-concept prototype named WiCare, a non-intrusive and device-free healthcare service system based on ubiquitous WiFi signals. It extracts Channel State Information (CSI) from the physical layer and detects the unique variations of CSI values caused by human activities. We implement WiCare on two laptops equipped with the commercial 802.11n network interface cards. Two potential application scenarios are considered: a living room and a bedroom. The results demonstrate that the proposed scheme achieves overall recognition accuracies of 92.3 % in living room and 87.6 % in bedroom with low false positive rates. Moreover, WiCare can send alarm messages when the server recognizes the occurrences of emergency activities, which assist the users in getting help as quickly as possible.