Traffic Grooming in WDM Ring Networks with Grooming Ratio 8

In this paper, we give the number of ADMs in a unidirectional ring, $A(8,N)$=$\lceil 5N(N-1)/16\rceil$ when $N\equiv 0,1,4,6,7$ (mod 16), with the possible exceptions $N$=36, 38, 39.