A Rendezvous Protocol with the Heterogeneous Spectrum Availability Analysis for Cognitive Radio Ad Hoc Networks

Figure 2

Standard torus QS example: node 𝐴 is built by picking the third column as its head and 3 randomly chosen slots from succeeding columns. 𝐵 is formed by selecting the sixth column and its tail from succeeding columns in a wrap-around manner. 𝐶’s head is the second column. 𝐴 and 𝐵 intersect at slots 11 and 14, 𝐵 and 𝐶 at slot 7, and 𝐴 and 𝐶 at slots 2 and 9.