“…� communication from i to j: S 1 = {(1, 2), (1, 5), (2, 1), (2, 3), (3, 2), (3,4), (4, 3), (4, 5), (5, 4), (5, 1)}; � communication between i and j: In summary, this means that under communication strategy i → j of Figure 1a, only one edge is activated during one period T c , and that all the edges have been activated once after 2p = 10 periods T c . Under communication strategies i ↔ j and m → i and j (Figure 1b,c), on the other hand, two edges are activated during one period T c .…”