| | Patent 5982747: Method for managing failures on dynamic synchronous transfer mode dual ring topologies |
 | | The average travel distance in a single ring topology or a dual ring topology, with the same fiber direction, is half the ring circumference while the average travel distance in a dual ring topology having opposite fiber directions is only one quarter of the ring circumference. |
 | | By providing the ring topologies 12, 14 with fiber directions that are opposite to one another, the average distance a time slot must travel from a source node to a destination node is reduced to half the statistical average distance of a single ring topology 12. |
 | | Because the ring topology is round, it is also possible to reserve slots from the end node to the start node, such as from node G to node A. This is an added feature of ring structures that is not available in single or dual straight bus topologies. |
| www.freepatentsonline.com /5982747.html (1069 words) |