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. 2020 Aug 20;8:153479–153507. doi: 10.1109/ACCESS.2020.3018140

TABLE 2. Summary of Wireless Technologies Applications to Social Distancing.

Technology Range Accuracy Cost Privacy Scalability Indoor/Outdoor Readily available devices
Wi-Fi [20], [51], [53], [55], [59], [168] Typically up to 50 m indoors and 100 m outdoors [164] 1–5 m [54] Low Low High Indoor Mobile phones, smart home, smart city [66], [168]
Cellular [86], [87], [90], [93], [97] Short to Long Less than 50 cm [77] High Low to High High Both Smartphone, Smartwatch, Mobile phones [226], Intelligent Transportation Systems [213], [220], [221]
Ultra- wideband [121][124], [128], [129], [131], [132] Short to Medium Less than 10 cm [121], [122], [128] Medium High Medium Both Smartphone [131], Smart industry [121][123], Public transport management [124], Commercial vehicles [121], [124]
Bluetooth [103], [105], [108], [111][116], [168] Outdoor: 55–78 m. Office: 15–19 m. Home: 26–35 m [165] 1–2 m [114] Low Low High Both Mobile phones, smart home, smart city [113], [117], [168]
Zigbee [159], [162], [163], [168] Up to 300+ m (line of sight). Up to 100 m indoor [160] 3–5 m [159] Low to Medium Low Low Indoor Mobile phones, smart home, smart city [171][173]
GNSS [136], [138][140], [142][144], [146][149] World-wide coverage Outdoor less than 10 cm [141], indoor inm High Medium High Outdoor Mobile phones [217], [219], [224], Intelligent Transportation Systems [213], [214]
RFID [150], [152], [154], [168] Active: 100 m or more. Passive: 10 m [166] Less than 1 m [152] Low to Medium Low Medium Indoor Mobile phones, smart home, smart city [169], [170]