Table 4 Maximum percentage on Erlang capacity gain given for every single considered resource management mechanism when M = 6, N = 3, f _v  = 0.4767, b _max = 3 and, a maximum value of ρ = 0.23

Buffer for new data calls

E3 vs E4

5.15 (y \( {P}_{\mathrm{ft}\_\mathrm{d}}^{\left(\mathrm{S}\right)}=0 \), at the expense of a longer transmission delay)

72.36

Spectrum adaptation

E2 vs E1

1.65 (and lower \( {P}_{\mathrm{ft}\_\mathrm{d}}^{\left(\mathrm{S}\right)} \) and transmission delay)

43.1

Double preemptive and channel reservation

E5 vs E4

0.16 (the same \( {P}_{\mathrm{ft}\_\mathrm{d}}^{\left(\mathrm{S}\right)} \) and transmission delay)

1.13

Selective interruption

E6 vs E1

{E7 vs E2}

− 0.03^a

{− 0.11^a}

(higher \( {P}_{\mathrm{ft}\_\mathrm{d}}^{\left(\mathrm{S}\right)} \) and similar transmission delay)

-0.43^a

{−1.37^a}

Buffer for interrupted data calls

E5 vs E7

− 0.47^a (\( {P}_{\mathrm{ft}\_\mathrm{d}}^{\left(\mathrm{S}\right)}=0 \) for E5 strategy. The transmission delay is the same for both, E5 and E7, strategies)

−7.23^a