Table 2.

Simulation parameters.

Parameter	Value
Transmit power of terminal $p_s$ Receive power of terminal	200 mW 90 mW
RRC_Connected power of terminal $E_{connect}$ Battery capacity	90 mW 5 Wh
Satellite orbit altitude $h$	600 km, 1200 km
Sat Rx max Gain $G_0$	24 dBi
Sat beam diameter $R$	90 km
G/T	−4.9 dB/K
Average power of the line-of-sight path ${\mathsf{\Omega }}_s$	0.825
Fading severity parameter $m_s$	10
Average power of the scattered path $2b$	0.252
Noise density ${\sigma }^2$	−174 dBm/Hz
Density of active IoT devices $\lambda$	0.1 device/${\mathrm{km}}^2$
Number of sub-carriers	48
Maximum Number of repetitions $N_{\mathrm{rep}}^{\max }$ Back-off Window size $W_{BO}$ Time of RAO $T_{RAO}$ Packet Size Simulation time	{4, 12}, {8, 18} [0, 256·$2^j$], j$\in${0, 3} ms 640 ms 125 byte 15 min