You are to consider various designs and find the maximum throughput. Which network provides the maximum capacity per user. The re-circulating perfect shuffle network gives max. Only four wavelengths are possible on the optical medium. A node may have no more than four transmitters and receivers and all may operate in parallel.
Traffic is uniform.
For the 8 node re-circulating perfect shuffle lightwave network. Consider heavy traffic from node 1 to nodes 4 and 2 and from node 8 to node 2. Repeat the above if node 6 fails after node 8 fails. Now, suggest re-arranging the network to reduce the number of hops. The number of hops is 1 in each case.