42 results about "Virtual optical network" patented technology

The invention discloses a virtual optical network mapping method, which calculates the virtual importance of each virtual link according to the bandwidth requirement of the virtual link in the virtual optical network and the resource requirement of the virtual node; according to the path of the physical link in the physical optical network Conditions and resource conditions of physical nodes, calculate the physical importance of each physical link; sort each virtual link in descending order of virtual importance to form a mapping sequence; according to the mapping sequence, obtain the current virtual link that needs to be mapped ; Determining the physical link with the highest physical importance among all the current remaining physical links as the current physical link corresponding to the current virtual link; configuring physical resources that meet the mapping requirements of each virtual link in the physical optical network. In addition, a virtual optical network mapping device, equipment and medium provided by the present invention correspond to the above-mentioned method, so that the network cost of mapping can be reduced as much as possible and the maximum profit can be obtained.

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.

The invention provides a control system and a control method for a virtual network with multiple reliability levels, and aims to meet the reliability requirement that multi-node service is diversified in an existing optical transport network. The control system for the virtual network with multiple reliability levels, provided by the invention comprises a resource abstraction module, a virtual optical network agent, a reliability management module, a path calculation module and a resource database. The control method for the virtual network with multiple reliability levels, disclosed by the invention comprises the following steps: step one, abstract management of resources; step two, judgment of user permission; step three, deployment of a service calculated path. A network node degree requirement in a user request is used as a user reliability level requirement, and whether the user request is received or not is judged according to the user reliability level requirement and the maximum reliability threshold value of the network. According to a virtual network mapping method of the reliability requirement of each user, the access success rate of the virtual network can be increased.

The invention relates to a transparent virtual optical network collaborative mapping method for node importance perception, and belongs to the technical field of optical fiber communication. In the virtual network node mapping stage, the method designs the importance measurement formulas of virtual nodes and physical nodes, comprehensively evaluates the proximity of unmapped nodes and mapped nodes, and the spectral density of mapped paths; and adopts the node-link cooperative mapping method , while successfully mapping a pair of adjacent virtual nodes, immediately map the virtual optical link between them, and allocate spectrum resources on the mapped physical path. The present invention transmits more virtual optical network services by using fewer spectrum resources, reduces link spectrum fragmentation and enhances the compactness of node mapping, improves network operators' income, and shortens the length of virtual optical link mapping. The service quality of the business is guaranteed.