Table 3 Employed numerical parameters

Δ τ

Slot length

10 ms

M

Number of sensors

var

λ

Average arrival rate per sensor

var

μ ⁻¹

Average size of data

512 bytes [37]

K

Number of available channels

37 [3]

r

Fixed data rate

236.7 kbit/s

f

Operational frequency

2.4 GHz [3]

w

Spectral bandwidth

2 MHz [3]

k

Propagation exponent

4 [38]

l

Wavelength

0.123 m

p _max

Max power of RF amplifier

10 mW [3]

p _min

Min power of RF amplifier

0.01 mW [3]

P _a

Consumption of a waiting sensor

2 mW [6]

P _c

Circuit power consumption

60 mW [6]

B ₀

Energy buffer capacity

2 mAh [39]

η

Antenna gain

1.64