In this section we present the scenario under investigation, along with numerical results, We assume a wireless cognitive mesh network where the source and the sink are located in opposite locations inside the cognitive area, An arbitrary number of intermediate secondary nodes, whose selection is based on the multihop selection algorithm presented above with ε = 0.8, act as relays assisting transmission, The primary system is a relay network with at most one relay at its disposal, This choice serves the visualization of the results in terms of primary system SINR, since in more sophisticated network architectures it is difficult to define a global SINR measure, against which to express capacity, Fig, 2 and Fig, 3 illustrate the effect of these parameters on system performance.
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