Fig. 6From: Spectrum sharing via hybrid cognitive players evaluated by an M/D/1 queuing modelThe two players’ normalized utilities versus the number of primary users with n s = 3, λ p = 10 kbps, λ s = 1 kbps, and different μ ranging from 100 to 160 kbps for the Stackelberg games in Section 3.2 and cost function defined with Eq. 11 Back to article page