Distances in generalized Double Rings and Degree Three Chordal Rings

Generalized Double Rings (N2R) are compared to Degree Three Chordal Rings (CR) in terms of average distance, diameter, k-average distance and k-diameter. For each number of nodes, structures of each class are chosen to minimize diameter and average distance, an approach which is shown to result in all other parameters being either minimized or nearly minimized. Average distance and diameter are compared for all structures with up to 1000 nodes, and k-average distances and k-diameters for all structures with up to 400-900 nodes. N2R are shown to be superior with regard to these parameters, especially for large structures