42 results about "Virtual optical network" patented technology

A kind of mapping method based on SDN architecture facing virtual optical network, comprising step 1: determine virtual request and each network parameter and topology diagram of physical bottom layer, and create a topology auxiliary diagram with VON-FP value as link weight, determine Optimization goal; Step 2: Arrange the links on the topology auxiliary map in ascending order of VON-FP value, classify them according to the virtual request, and determine the mapping method according to the mapping rules; Step 3: Develop a population-based global search and individual-based The method frame of the local heuristic search, and use this search method to solve the mapping of the classified virtual optical network requests; Step 4: Repeat the iterative search mapping method to obtain the optimal mapping scheme when the fitness function is the smallest, and use the scheme Assigned to the SDN-based NOX architecture for specific data calculation and traffic forwarding operations. The method of the invention improves the efficiency of multi-domain virtual optical network mapping, and reduces the failure rate of the entire network after mapping.

The invention provides a virtual optical network-oriented spectrum resource trading method and system. The method includes: after virtual optical networks are constructed according to a preset topological structure, in different time slots, controlling, based on capacity demand information of virtual links of the virtual networks, 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 the virtual optical networks trade spectrum resources according to a real-time capacity demand. A virtual link with idle spectrum resources can supply spectrum resources to a virtual link with insufficient capacity, and a virtual optical network with insufficient spectra can perform spectrum trading to use idle spectra of other virtual optical networks to transmit undeployed service traffic of the virtual optical network, thereby effectively improving the utilization of network spectrum resources.

The invention relates to a virtual optical network cooperative mapping method based on spectrum dispersion perception, and belongs to the technical field of optical fiber communication. When the method selects the route according to the weight of the physical node, the node weight considers the remaining computing resources and the geographical location of the physical node in the whole network topology, and the balanced use of the computing resources of multiple physical nodes is achieved by adjusting the weight factor. In spectrum allocation, in order to reduce the number of spectrum usage and spectrum fragmentation, the link spectrum dispersion formula and the criterion for determining the overloaded link are designed in the mapping process. Combined with the location of the mapped physical nodes, the number of spectrum usage on the candidate optical path is calculated. According to the spectral dispersion degree of the link, the optical path with less consumption frequency slots and low spectral dispersion degree is selected for cooperative mapping with its adjacent physical nodes. The invention improves the bandwidth utilization rate and reduces the network blocking rate.