Method and device for partitioning physical network resources

In a physical network having physical transmission and switching resources, a method for partitioning the physical transmission resources among logical links, the method comprising the steps of:

• establishing logical nodes and the logical links on top of the physical network, wherein the logical links are used by routes interconnecting nodes of node pairs;
• determining logical link capacities;
• and
• allocating the physical transmission resources among the logical links according to the determined logical link capacities;
• wherein the step of determining logical link capacities is performed under the constraint that the route blocking probability on each individual route is required to be less than or equal to a maximum allowed blocking probability for each individual route, and performed under a distribution, for each individual route, of the route blocking probability evenly among the logical links used by the individual route.

In a physical network having physical transmission resources, a device for partitioning the physical transmission resources among logical networks, the device comprising:

• means for establishing a set of logical networks on top of the physical network, wherein the logical networks include nodes and logical links, and the logical links are used by routes interconnecting nodes;
• means for determining logical link capacities;
• and
• means for allocating the physical transmission resources among the logical links of the logical networks according to the determined logical link capacities;
• wherein the determining means determines the logical link capacities under the constraint that the route blocking probability on each individual route in each logical network is required to be less than or equal to a maximum allowed blocking probability for each individual route, and under a distribution, for each individual route, of the route blocking probability evenly among the logical links used by the individual route.