Research Article
Emergency Communication and Quick Seismic Damage Investigation Based on Smartphone
Table 2
Characteristics of the communication protocol used in iPhone.
| | Protocol | Bandwidth (GHz) | Standard transmission rate (Mbit/s) | Max. transmission rate (Mbit/s) | Coverage radius (indoor) | Coverage radius (outdoor) |
| | 802.11a | 5.15–5.35/5.47–5.725/5.725–5.875 | 25 | 54 | 30 m | 45 m | | 802.11b | 2.4–2.5 | 6.5 | 11 | 30 m | 100 m | | 802.11g | 2.4–2.5 | 25 | 54 | 30 m | 100 m | | 802.11n | 2.4 GHz or 5 GHz | 300 (20 MHz 4 MIMO) | 600 (40 MHz 4 MIMO) | 70 m | 250 m | | 802.11ac | 5 GHz | 433, 867 (80 MHz, 160 MHz) | 867, 1730, 3470, 6930 (8 MIMO, 160 MHz) | 35 m | |
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