Name
Title | ||
|---|---|---|
E-eyes: device-free location-oriented activity identification using fine-grained WiFi signatures |
Abstract | ||
|---|---|---|
Activity monitoring in home environments has become increasingly important and has the potential to support a broad array of applications including elder care, well-being management, and latchkey child safety. Traditional approaches involve wearable sensors and specialized hardware installations. This paper presents device-free location-oriented activity identification at home through the use of existing WiFi access points and WiFi devices (e.g., desktops, thermostats, refrigerators, smartTVs, laptops). Our low-cost system takes advantage of the ever more complex web of WiFi links between such devices and the increasingly fine-grained channel state information that can be extracted from such links. It examines channel features and can uniquely identify both in-place activities and walking movements across a home by comparing them against signal profiles. Signal profiles construction can be semi-supervised and the profiles can be adaptively updated to accommodate the movement of the mobile devices and day-to-day signal calibration. Our experimental evaluation in two apartments of different size demonstrates that our approach can achieve over 96% average true positive rate and less than 1% average false positive rate to distinguish a set of in-place and walking activities with only a single WiFi access point. Our prototype also shows that our system can work with wider signal band (802.11ac) with even higher accuracy. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1145/2639108.2639143 | MobiCom |
Keywords | Field | DocType |
channel state information,miscellaneous,location-oriented,device-free,activity recognition,wifi | False positive rate,Activity recognition,Computer science,Wearable computer,Computer network,Communication channel,Thermostat,Real-time computing,Mobile device,Elder care,Channel state information,Embedded system | Conference |
Citations | PageRank | References |
185 | 5.12 | 34 |
Authors | ||
6 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Yan Wang | 1 | 811 | 40.19 |
| Jian Liu | 2 | 256 | 7.53 |
| Yingying Chen | 3 | 2495 | 193.14 |
| Marco Gruteser | 4 | 4631 | 309.81 |
| Jie Yang | 5 | 1605 | 83.06 |
| Hongbo Liu | 6 | 186 | 5.47 |