Virtual optical network-oriented spectrum resource trading method and system

A virtual optical network-oriented spectrum resource trading method, comprising:

• constructing a group of virtual optical networks in advance according to a preset topological structure, and configuring capacity demand parameters for virtual links of each virtual optical network;
• controlling, based on capacity demand parameters of the virtual links in different time slots, cumulative credit values of the virtual optical networks, and a preset credit threshold, the virtual links between the virtual optical networks to trade spectrum resources of a common physical link, to implement that a virtual link with idle spectrum resources supplies spectrum resources to a virtual link with insufficient capacity, wherein
• the virtual optical networks have a spectrum conversion capability and a subband virtual concatenation transmission capability, and virtual links that trade spectra have a common physical link;
• the capacity demand parameter comprises a virtual optical network to which a virtual link belongs, a source node and a destination node of the virtual link, a time slot index, a start index and an end index of frequency slots (FSs) allocated to the virtual link, and an FS demand quantity for meeting all service traffic on the virtual link (the source node and the destination node) in a current time slot;
• and the cumulative credit value is a sum of credit values of a virtual optical network in time slots before the current time slot.