Fig. 1. Examples of virtual network mapping. (a) Physical network; (b) virtual network; (c) result of the first mapping algorithm; (d) result of the second mapping algorithm

Fig. 2. Frequency spectrum state on a link

Fig. 3. Flow chart of NF-VONM algorithm

Fig. 4. Diagram of frequency spectrum constraint

Fig. 5. NSFNET topology

Fig. 6. Blocking probability of virtual network

Fig. 7. Average hop of virtual link

Fig. 8. Average resource consumption in link

Fig. 9. Revenue of physical network

Fig. 10. Number of serviceable virtual network

Fig. 11. Average mapping time