The traffic capacity and the average shortest path length as a function of under the shortest path routing strategy. In each figure, the gray and black colors are for the cases with and, respectively. The network size is set to . The circles, asterisks, and plus signs are the results of the strategy in [69], the random strategy, and the strategy that adds links among hub nodes, respectively. Each result is obtained by averaging over fifty different network configurations and ten independent link-adding processes for each network realization when executing our strategy and the random strategy.
