Table 2.
Summary of techniques for WiFi-based IPS.
| Technique | Advantages | Disadvantages | Accuracy (m) |
|---|---|---|---|
| RSS Ranging [38] | - Low cost of | - RSS values fluctuate | 2.397 |
| implementation | when stationary | ||
| - No hardware | |||
| modifications required | |||
| RSS | - Low cost of | - Extensive site survey | 0.169–7.6 |
| Fingerprinting | implementation | required before | |
| [39,40,41,42,43,44,45,46,47] | - No hardware | implementation | |
| modifications | |||
| required | |||
| CSI | - Capable of low | - Requires specific | 0.09–2.087 |
| Fingerprinting | localization errors | hardware and | |
| [32,48,49,50], | firmware to access CSI | ||
| - Extensive site survey | |||
| required before | |||
| implementation | |||
| Hybrid AoA/ | - Capable of | - Requires specific | 0.75–1.5 |
| Ranging | localization with | hardware | |
| [51,52,53,54], | a single anchor | ||
| RTT Ranging | - Supported on | - Poor performance | 0.5-2.10 |
| [36,37,38,55], | commodity devices | in NLoS | |
| - Disrupts regular | |||
| network traffic |