“…A set of nodes that can transmit simultaneously forms an "independent set" ( [9], [12], [10], [15]) in the conflict graph; an independent set which can't have any more nodes added to it is maximal. In Figure 3a, the maximal independent sets are (1,3,5), (1,4), (2,5), and (2,4). In Figure 3b, the maximal independent sets are (1,4), (1,5), (2,5) and (3).…”