Table 1.

The parameters of Internet of Things (IoT) devices and mobile edge computing (MEC) server.

Parameter	Description	Value	Unit
$PL$	Pathloss	$35.3+37.6\ast log10\left(d\right)$	dB
${\delta }^2$	Thermal noise	$-179.0$	dBm/Hz
d	Distance between devices and server	$[200,800]$	meter
$f_i$	Computation capability of devices	$\left\{2000,3300\right\}$	cycle/s
$f^e$	Computation capability of MEC server	7000	cycle/s
$P_i$	Transmit power of IoT devices	20	dBm